MXPA00004009A - Cleansing and conditioning article for skin or hair having improved fragrance delivery - Google Patents

Cleansing and conditioning article for skin or hair having improved fragrance delivery

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Publication number
MXPA00004009A
MXPA00004009A MXPA/A/2000/004009A MXPA00004009A MXPA00004009A MX PA00004009 A MXPA00004009 A MX PA00004009A MX PA00004009 A MXPA00004009 A MX PA00004009A MX PA00004009 A MXPA00004009 A MX PA00004009A
Authority
MX
Mexico
Prior art keywords
fragrance
substrate
conditioning
water
layer
Prior art date
Application number
MXPA/A/2000/004009A
Other languages
Spanish (es)
Inventor
Erik John Hasenoehrl
Emily Elizabeth Gottlieb
Original Assignee
The Procter&Ampgamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter&Ampgamble Company filed Critical The Procter&Ampgamble Company
Publication of MXPA00004009A publication Critical patent/MXPA00004009A/en

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Abstract

The present invention relates to a substantially dry, disposable, personal cleansing product useful for both cleansing and conditioning the skin/hair and providing improved fragrance delivery. These articles are used by the consumer by wetting the dry article with water. The article comprises a water insoluble substrate, a lathering surfactant, and a fragrance-releasing complex. Preferably, the articles of the present invention further comprise a conditioning component. Use of the substrate enhances lathering at low surfactant levels, increases cleansing and exfoliation, optimizes delivery and deposition of conditioning ingredients, and provides desirable characteristics such as texture, thickness and bulk. As a result, this invention provides effective cleansing using low, and hence less irritating, levels of surfactant while providing superior conditioning benefits by using a substrate having desirable characteristics. The invention also encompasses products further comprising a coating material for encapsulating the fragrance-releasing complex. The invention also encompasses products comprising various active ingredients for delivery to the skin or hair. The invention also encompasses methods for manufacturing these products.

Description

CONDITIONING AND CLEANING ARTICLE FOR SKIN OR HAIR THAT HAS SUPPLY OF IMPROVED FRAGRANCE TECHNICAL FIELD The present invention relates to a disposable, substantially dry, personal cleansing product useful for cleansing and conditioning skin / hair and providing an improved fragrance supply. These items are used by the consumer moistening the dry item with water. The article comprises a non-water soluble substrate, a foaming surfactant, and a fragrance release complex. Preferably the articles of the present invention additionally comprise a conditioning component.
BACKGROUND OF THE INVENTION The present invention relates to conditioning and personal cleansing articles for the skin or hair that have improved fragrance delivery. Fragrances, for example, perfumes, are a desirable part of personal cleansing articles for two main reasons: they cover unpleasant odors from raw materials, and provide a benefit of aesthetic odor. Fragrances are also used in personal cleansing items to serve as a sign that the product is effective (for example, that the skin is clean and fresh). Articles for personal cleansing have traditionally been marketed in a variety of forms such as bar soaps, creams, lotions and gels. These cleaning formulations attempt to satisfy a number of criteria to be acceptable to consumers. These criteria include cleansing effectiveness, skin sensation, softness to the skin, hair and ocular mucosa, and volume of foam. Ideal personal cleansers should gently cleanse the skin or hair, cause little or no irritation, and not leave skin or hair extremely dry after frequent use. However, those traditional forms of personal cleansing products have the inherent problem of balancing cleaning efficiency against the provision of a conditioning benefit. Although a solution to this problem is the separate use of cleaning and conditioning items, this is not always convenient or practical and many consumers would prefer to use a single item that can clean and condition the skin or hair. In a typical cleaning composition the conditioning ingredients are difficult to formulate because many conditioners are incompatible with surfactants, resulting in an undesirable inhomogeneous mixture. To obtain a homogeneous mixture with conditioning ingredients, and to avoid the loss of conditioning ingredients prior to deposition, additional ingredients, for example emulsifiers, thickeners and gelatinizers are often added to suspend the conditioning ingredients within the surfactant mixture. This results in an aesthetically pleasing homogeneous blend, but often results in poor deposition of conditioning ingredients, because the conditioners are emulsified and not released efficiently during cleaning. In addition, many conditioning agents have the disadvantage of suppressing foam generation. The suppression of foam is a problem because many consumers look for cleaning supplies that provide a rich, creamy and generous foam. Therefore, it is noted that conventional personal cleansing articles that attempt to combine surfactants and conditioning ingredients suffer from the disadvantages inherently resulting from the incopatibilities of surfactants and conditioners. An effective solution is an article that provides effective cleaning and conditioning consistent with a disposable, convenient, inexpensive and hygienic personal cleansing article having the desirable properties of a wash cloth. These items provide the convenience of not needing the use of a separate cleaning and conditioning item. These items are also very convenient to use because they are in the form of a substantially dry article that is moistened before being used., and therefore, avoids the need to carry bottles, bars, jars, tubes and other cumbersome forms of cleaning and conditioning items. Disposable articles are also a more hygienic alternative to the use of a sponge, wash cloth, or other cleaning implement designed to be reused multiple times, because such implements develop bacteria growth, unpleasant odors, and other undesirable characteristics related to the repeated use. Fragrances such as perfumes can be added directly to the disposable articles described above. There are, however, several disadvantages when perfumes are added as a pure oil on or impregnated in substantially dry articles. One problem is that some of the perfume ingredients are not stable and, therefore, are subject to damage and / or loss. They can also suffer an oxidative reaction or other chemical reaction (for example by oxygen, light, heat, etc.) and cause discoloration of the articles that contain them. A further disadvantage that arises from the direct addition of perfumes to substantially dry cleaning articles is that the perfume components are, in general, volatile and, therefore, easily lost from the product during processing or storage. The loss of the highly volatile fraction of the perfume is especially high. As a result, in the past, personal cleansing products tended to use perfumes composed primarily of less volatile, high-boiling perfume components (which have high boiling points) to maximize the survival of the fragrance during product processing and storage. and therefore provide better fragrance benefits in use and after use. This was not the most desirable situation, however, because some of the low boiling, volatile perfume ingredients can provide an impression of freshness and cleanliness, and it is highly desirable that these ingredients are supplied and are present in the product. for personal cleaning. Another problem that arises from the direct addition of perfume to substantially dry disposable articles is that there is no flexibility to simultaneously optimize the demonstration of fragrance in the pure product (for example the disposable article) and during the use of the product. For example, the optimum fragrance level may result in the pure product having too strong a smell. Similarly, the optimum fragrance level in the disposable article can lead to less satisfactory results during use. It would be desirable to be able to adjust the fragrance demonstration independently in the pure product and in use. Perfumes are ingredients that have been commonly added to personal cleansing products to impart aesthetically pleasing aromas, as mentioned herein above. Perfumes can be designed and selected to make a variety of impressions about the user. Unfortunately a particular perfume will typically carry a single or total continuous message, and it would not clearly communicate the multiple functions of a multi-function cleaning product or be improved during the use of the product to reinforce the performance of the product. Therefore, it is highly desirable that double fragrance characters be supplied in the personal cleansing products to achieve the distinguishing capacity of the product or the multiple, different functions of the product. The inventors hereby have surprisingly discovered that the use of a perfume release complex provides the item for disposable cleaning and conditioning, dry (i) improved fragrance stability, (ii) fragrance evanescence in improved use of the article for disposable cleaning, and (iii) the ability to supply double fragrance. The perfume component may consist of a perfume in complex with a variety of organic and inorganic materials. Is, therefore, an object of the present invention to provide such articles for personal, disposable, substantially dry cleaning. It is another object of the present invention to provide conditioning and personal cleansing articles which consistently provide fragrance in which the articles are used in combination with water. These and other objects of the invention will be apparent from the lus of the following description.
BRIEF DESCRIPTION OF THE INVENTION The present invention relates to a disposable conditioner and disposable personal cleansing product which is rinsed from the skin or hair and which has desirable fragrance delivery properties, comprising: (A) a substrate not soluble in water, (B) at least one foaming surfactant added on or impregnated into the substrate, and (C) from 0.015% to 15% by weight of said non-water soluble substrate, from an added fragrance release complex over or impregnated in said substrate, characterized in that said product is substantially dry before use. The fragrance release complex comprises (i) from 10% to about 90% by weight of the complex, of a porous fragrance carrier, and (ii) from 1% to about 90% by weight of the complex, of a fragrance impregnated within of said carrier. The present invention also relates to a method for manufacturing a disposable, disposable, single-use conditioner and personal cleansing product which is rinsed from the skin or hair and which has desirable fragrance delivery properties, comprising the steps of separately or simultaneously add on or impregnate in a water-insoluble substrate (A) at least one foaming surfactant added on or impregnated on said substrate, and (B) from 0.015% to about 15% by weight of said substrate not soluble in water, of a fragrance release complex added on or impregnated in said substrate, characterized in that said product is substantially dry before use. The fragrance release complex comprises (i) from 10% to about 90% by weight of the complex, of a porous fragrance carrier, and (ii) from 1% to about 90% by weight of the complex, of a fragrance impregnated within of said carrier. In further embodiments the fragrance release complex is encapsulated with a coating material that is selected from the group consisting of paraffin waxes, micro crystalline waxes, animal waxes, vegetable waxes, saturated fatty acids and fatty alcohols, fatty esters, cellulose esters , polyalkylene glycol, polyvinyl alcohol, and mixtures thereof, and wherein the coating material is present in an amount ranging from 2% to about 50% of the fragrance release complex. In further embodiments, the present invention further comprises a conditioning component added on or impregnated in said substrate. The conditioning component comprises materials which is selected from the group consisting of water-soluble conditioning agents, oil-soluble conditioning agents, conditioning emulsions, lipid hardening materials, and mixtures thereof. The conditioning component preferably has a larger lipid hardness value of about 0.02 kg. The conditioning component also preferably has a surface to saturation ratio of greater than about 1.25 at any point on the surface of the substrate. All percentages and ratios used herein, unless otherwise specified, are by weight and all measurements made are at 25 ° C, unless otherwise designated. The invention herein may comprise, consist of, or consist essentially of, the optional as well as optional ingredients and components described therein.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view illustration of a cleaning and conditioning article of the present invention, the article includes a paper layer with openings and a non-woven layer, with the paper layer shown in front of view, and with a portion of the apertured layer shown cut away to show spaced apart, generally parallel, areas of adhesive extending parallel to the machine directions of the paper and non-woven layer. Figure 2 is an illustration of a portion of the article for cleaning and conditioner shown in Figure 1, Figure 2 being enlarged in relation to Figure 1 to show the curled edges of the paper layer. Figure 3A is a cross-sectional illustration of the cleaning and conditioning article of the present invention taken along the direction indicated by line 3-3 in Figure 1, and showing the article before moistening the first layer.
Figure 3 B is a cross-sectional illustration taken along the direction indicated by line 3-3 in Figure 1, and showing the article after wetting the first layer. Figure 4 is an illustration of a paper machine that can be used to make paper webs that can be used to form the substrate portion of the conditioner and cleaning articles herein. Figure 5 is an illustration of a forming element that can be used to form a paper web with openings.
DETAILED DESCRIPTION OF THE INVENTION The present invention provides fragrances in an efficient and cost effective manner for a substantially dry, disposable conditioner and disposable article. In particular, the cleaning articles of the present invention may transmit double fragrance characteristics and may exhibit desirable fragrance characteristics in their pure (i.e., dry) form as well as during use. Therefore, the personal cleansing articles of the present invention provide (i) improved fragrance stability, (ii) improved fragrance evanescence during the use of the product for disposable cleaning, and (iii) the ability to supply double fragrance while It is highly effective for cleaning skin or hair. The articles may also contain active conditioning ingredients and other non-conditioning active ingredients to be deposited on the skin or hair. By a "foaming surfactant" it means a surfactant, which when combined with water and mechanically stirred generates a foam or foaming. Preferably these surfactants should be soft, which means that these surfactants provide sufficient cleaning or detersive benefits but do not extremely dry the skin or hair (for example by removing too much natural oil and / or moisture), and yet meet the criteria of Foaming described above. The terms "disposable" or "single-use" are used herein in their ordinary sense to mean an article that is discarded or discarded after an event of use. The term "conditioning component", as used herein, means a combination of the conditioning agents. The combination may also include lipid hardening materials. The term "water activated", as used herein, means that the present invention is presented to the consumer in a dry form to be used after it is moistened with water. It has been found that these articles produce a foam or are "activated" by contacting them with water and then further subjecting the article to mechanical forces, such as carving.
The term "substantially dry", as used herein, means that before use the article is substantially free of water and generally feels dry to the touch. Therefore, the articles of the present invention will generally comprise less than 10% by weight of water, preferably less than 5% by weight of water, and more preferably less than 1% by weight of water, the foregoing measured in an environment dry, for example, low humidity. One of ordinary skill in the art will recognize that the water content in an article as in the present invention may vary with the relative humidity of the environment. The term "surface to saturation ratio" is a measure of the proportion of the conditioning agent and active ingredient that is on the surface of the substrate against the interior of the substrate. Someone of normal skill in the analytical chemistry technique would be well versed in measurements obtained from Attenuated Total Reflection Spectroscopy (ATR) FT-IR. What is believed is a complete description is provided in the section entitled "Method for measuring the Surface Application of active ingredients and conditioning agents". The term "soft" as used herein with reference to the foaming surfactants and articles of the present invention means that the articles of the present invention demonstrate skin softness comparable to a mild synthetic bar based on surfactant. of alkylglyceryl ether sulfonate (AGS), that is, a synthetic bar. The methods for measuring the softness, or conversely the irritation capacity, of articles containing surfactant, are based on a skin barrier destruction test. In this test, the milder the surfactant, the less the skin barrier is destroyed. Skin barrier destruction is measured by the relative amount of radio-labeled water (labeled with tritium) (3H-H2O) which passes from the test solution through the epidermis of the skin into the physiological pH regulator contained in the diffusion chamber. The test is described by T.J.Franz in J. Invest. Dermatol., 1975, 64, pp. 190-195; and in U.S. Patent No. 4,673,525, to Small et al, June 16, 1987, both of which are hereby incorporated by reference in their entirety. Other test methodologies for determining the surfactant softness well known to one of skill in the art can be used. The term "deposition consistency" as used herein, means that the deposition of the conditioning agents comprising the conditioning component will be relatively invariant no matter how prepared to use, and the current uses of the conditioner and cleaning article (eg. example, foaming with the side of the substrate carrying the conditioning component against foaming with the substrate side with the surfactant). The articles of the present invention will have a deposition consistency of greater than 60%, preferably greater than 65%, more preferably greater than 70% and more preferably greater than 75%. The measurement of deposition consistency is the quotient obtained by dividing the amount of deposition of conditioning agents that occurs through "foam formation and non-ideal use" by the amount of deposition of conditioning agents that occurs through "foam formation and ideal use. " The non-ideal foam formation, as used herein, means that foaming is achieved by carving together or against itself the surface of the article containing the conditioning agents and then contacting the skin or hair with the same surface. This causes an inefficient deposition of the conditioning agents because some of the conditioning agents are emulsified by the surfactant. The ideal foam formation, as used herein, means that foaming is achieved by carving together or against the surface of the surfactant-containing article, but not containing the conditioning agents, and then contacting the skin or hair with the surface that contains the conditioning component. The same reference points would be applied if both surfaces of the substrate are treated with the conditioning agents (for example the deposition obtained from the formation of foam and the contact of the skin with the same surface with foam containing the conditioning agents emulsified against contact of the skin with the non-foamed surface which contains the non-emulsified conditioning agents). The deposition consistency is maximized when the lipid hardness value of the conditioning component is larger than about 0.02 kg.
The personal care articles of the present invention comprise the following essential components: (A) a water-insoluble substrate, (B) at least one foaming surfactant added on or impregnated into the substrate and (C) a fragrance release complex added on or impregnated in said substrate. The articles of the present invention may additionally comprise a conditioning component added on or impregnated in said substrate.
[- Substrate not soluble in water The products of the present invention comprise a substrate not soluble in water. By "not soluble in water" it means that the substrate does not dissolve in or decompose easily with immersion in water. The substrate not soluble in water is the implement or vehicle for supplying the surfactant and the conditioning component of the present invention to the skin or hair to be cleaned and conditioned. Without being limited by theory, it is believed that the substrate, by providing mechanical forces and agitation, provides a foaming effect and also aids in the deposition of the conditioning component. A wide variety of materials can be used as the substrate. The following non-limiting characteristics are desirable: (i) sufficient wet strength for use; (ii) sufficient abradability, (iii) sufficient sponginess and porosity, (iv) sufficient thickness, and (v) adequate size.
Non-limiting examples of suitable non-soluble substrates that meet the foregoing criteria include non-woven substrates, woven substrates, hydroentangled substrates, air-entrained substrates, natural sponges, synthetic sponges, polymeric network screens, and the like. Preferred embodiments use non-woven substrates because they are inexpensive and readily available in a variety of materials. By non-woven means that the layer is composed of fibers that are not woven into fabric but rather are formed into a sheet, mat or cushioned layer. The fibers may be either randomly (i.e., randomly oriented), or may be carded (i.e. combed to be oriented primarily in one direction). Additionally, the non-woven substrate may be composed of a combination of random and carded fiber layers. Nonwoven substrates may consist of a number of materials and synthetics. By natural means that the materials are derived from plants, animals, insects or byproducts of plants, animals and insects. By synthetic means that the materials are obtained mainly from various materials made by man or from natural materials that have been altered further. Conventional basic starting materials are usually a fibrous network comprising any of the common synthetic or natural fibers of textile length, or mixtures thereof.
Non-limiting examples of natural materials useful in the present invention are silk fibers, keratin fibers and cellulosic fibers. Non-limiting examples of keratin fibers include those that are selected from the group consisting of wool fibers, camel hair fibers, and the like. Non-limiting examples of cellulosic fibers include those selected from the group consisting of wood pulp fibers, cotton fibers, hemp fibers, jute fibers, flax fibers, and mixtures thereof. Non-limiting examples of synthetic materials useful in the present invention are those that are selected from the group consisting of acetate fibers, acrylic fibers, estercellulose fibers, modacrylic fibers, polyamide fibers, polyester fibers, polyolefin fibers, alcohol fibers polyvinyl, rayon fibers, polyurethane foam, and mixtures thereof. Examples of some of these synthetic materials include acrylics such as acrillan, creslan, and acrylonitrile-based fiber, orlon; cellulose ester fibers such as cellulose acetate, arnel and accelerator; polyamides such as nylons, (for example nylon 6, nylon 66, nylon 610 and the like); polyesters such as fortrel, kodel, and polyethylene terephthalate fiber, dacron; polyolefins such as polypropylene, polyethylene, polyvinyl acetate fibers, polyurethane foams and mixtures thereof. Those and other suitable fibers and the nonwoven materials prepared therefrom are generally described in Riedel, "Nonwoven Bonding Methods and Materials." Nonwoven World (1987); The Encyclopedia Americana, vol. 1 1, pp. 147-153 and vol. 26, pp. 566-581 (1984); U.S. Patent No. 4,891, 227, to Thaman et al, dated January 2, 1990; and U.S. Patent No. 4,891, 228, which are all incorporated herein by reference in their entirety. Nonwoven substrates made from natural materials consist of webs or sheets more commonly formed on a fine wire screen from a liquid suspension of the fibers. See C.A.Hampel et al, The Encyclopedia of Chemistry, third edition, 1973, p. 793-795 (1973); The Encyclopedia Americana, vol. 21, pp. 376-383 (1984); and G.A.Smook, Handbook of Pulp and Paper Technologies. Technical Association for the Pulp and Paper Industry (1986), which are all incorporated herein by reference in their entirety. Substrates made from natural materials useful in the present invention can be obtained from a wide variety of commercial sources. Non-limiting examples of suitable commercially available paper layers useful herein include Airtex®, an enhanced air-laid cellulosic layer having a basis weight of about 6,017 g / m2, available from James River, Green Bay, Wl; and Walkisoft®, a raised air-laid cellulosic layer having a basis weight of approximately 6,356 g / m2 available from Walkisoft U.S.A., Mount Holly, NC: Methods for making nonwoven substrates are well known in the art. In general, these non-woven substrates can be manufactured from air-laid, water-laid, blow-melt, shaping, twist-binding, or carding processes in which the fibers or filaments are first cut to the desired lengths from large strands, they are passed in a stream of water or air, and then they are deposited on a screen through which the fiber stretched to the air or in water is passed. The resulting layer, regardless of its production method or composition, is then subjected to at least one of several types of bonding operations to anchor the individual fibers together to form a self-sustained network. In the present invention, the non-woven layer can be prepared by a number of processes including hydroentangling, thermally bonding or thermal bonding, and combinations of those methods. Moreover, the substrates of the present invention may consist of a single layer or multiple layers. In addition, a multi-layer substrate may include films and other non-fibrous materials. Nonwoven substrates made from synthetic materials useful in the present invention can also be obtained from a wide variety of commercial sources. Non-limiting examples of suitable nonwoven layer materials useful herein include HEF 40-047, a knotted, hydroentangling, apertured material containing approximately 50% rayon and 50% polyester, and having a basis weight of approximately 3,644 g / m2 available from Veratec, Inc., Walpole, MA; HEF 140-102, a water-entangled material with openings containing approximately 50% rayon and 50% polyester, and having a basis weight of approximately 4,749 g / m2 available from Veratec, Inc., Walpole, MA; Novonet ® 149-616 a thermobonded material with grid pattern containing approximately 100% polypropylene, and having a basis weight of approximately 4,237 g / m2 available from Veratec, Inc., Walpole, MA; Novonet ® 149-801 a thermo-bonded material with grid pattern containing approximately 69% rayon, approximately 25% polypropylene, and approximately 6% cotton, and having a basis weight of approximately 6,356 g / m2 available from Veratec, Inc., Walpole, MA; Novonet ® 149-191 a grid pattern heat-bonded material containing approximately 69% rayon, approximately 25% polypropylene, and approximately 6% cotton, and having a basis weight of approximately 8,475 g / m2 available from Veratec, Inc., Walpole, MA; HEF Nubtex® 149-801, a knotted, water-entangled, knitted material containing approximately 100% polyester, and having a basis weight of approximately 5,932 g / m2 available from Veratec, Inc., Walpole, MA; Keybak ® 951V, a dry-formed apertured material containing approximately 75% rayon, approximately 25% acrylic fibers and having a basis weight of approximately 3,644 g / m2, available from Chicopee, New Brunswick, NJ; Sontara 8868, a hydroentangled material containing approximately 50% cellulose and approximately 50% polyester, and having a basis weight of approximately 5,085 g / m2, available from Dow Chemical Corp.
Alternatively, the water-insoluble substrate can be a polymeric mesh sponge, as described in European Patent No. EP 702550 A1 published March 27, 1996, incorporated herein by reference in its entirety. The polymeric sponges comprise a plurality of strata of an extruded tubular netting prepared from a strong flexible polymer, such as polymers of addition of olefin monomers and polyamides of polycarboxylic acids. Although such polymeric sponges are designed to be used in conjunction with a liquid cleaner, those types of sponges can be used as the non-water soluble substrate in the present invention. The substrate can be manufactured in a wide variety of shapes and sizes including flat pads, thick pads, thin sheets, ball-shaped implements, irregularly shaped implements, and having sizes on the scale from a surface area of approximately 2.54 cm2 to hundreds of square centimeters. The exact size will depend on the desired use and the characteristics of the product. Particularly suitable are square, circular, rectangular or oval pads having a surface area of 2.54 cm2 to 365 cm2, preferably 25.40 cm2 to 304.8 cm2 and more preferably 76.2 cm2 to 203.2 cm2 and a thickness of 25.4 microns to 12700 microns , preferably from 127 microns to 6350 microns, and more preferably from 254 microns to 2540 microns.
The water-insoluble substrates of the present invention can consist of two or more layers, each having different textures and different abrasion capacity. Different textures can result from the use of different combinations of materials or the use of different manufacturing processes or a combination thereof. A dual texture substrate can be manufactured to provide the advantage of having a more abrasive side for exfoliation and a softer, absorbent side for gentle cleaning. In addition, separate layers of the substrate can be fabricated to have different colors, thereby helping the user to further distinguish the surfaces.
A. Water-insoluble substrate having at least a wet-extensible portion. The articles of the present invention may preferably consist of a water-insoluble substrate in which at least a first portion of said substrate is wet extensible and at least one second portion of said substrate is less extensible wet than the first portion. By wet extensible it means that the material has a tendency to elongate at least in one direction when it is moistened. A test is then provided to measure extensibility. It is highly desirable to provide a conditioner and cleaning article having the qualities of a wash cloth. These desirable characteristics can be realized in disposable articles providing adequate texture, thickness (gauge), and volume (volume per unit weight). A relatively high texture value is desirable to aid in the cleansing of skin and hair. Relatively high values of caliper and volume are desirable to provide volume in the article for receiving and containing liquids. Typically, such laundry fabric articles have a substrate that includes one or more materials or layers. It has been surprisingly discovered that the present substrates, in which at least a first portion of said substrate is wet extensible and at least a second portion of said substrate is less extensible wet than said first portion, provide those desirable qualities of type washing cloth. One embodiment of a non-water-soluble substrate having at least one portion that is wet extensible is illustrated in Figures 1-2. In this embodiment, the present invention comprises an article 20 for disposable, multi-layer cleaning. Figures 1 and 2 illustrate a two-layer modality, or two layers of the present invention. Alternatively, the disposable cleaning article may include more than two layers. The disposable conditioner and cleaning article 20 consists of a substrate generally designated with the reference numeral 22. The substrate 22 consists of a first layer 100 and a second layer 200. The first layer 100 is openings, the first layer 100 comprises a plurality of openings 102 extending through the thickness of first layer 100. In Figure 1, openings 102 are shown on only a portion of first layer 100 for clarity. The first layer 100 is wet extensible when the first layer is wetted. The extensibility is measured according to the "Wet extensibility test" described below, and is reported as a percentage. The second layer 200 is relatively less extensible in wet when wetted than the first layer 100. The selected portions of the first layer 100 are bonded, directly or indirectly, to the second layer 200 to inhibit wet extensibility of the first layer in the first layer. plane of the first layer. In Figures 1 and 2, select portions of the first layer 100 are attached to the second layer 200 to provide designated regions 1 10 and unattached regions designated 1 14. In the embodiment shown in Figure 1, the joined regions 1 are spaced apart regions, generally parallel, extending along substantially the entire length of the article 20, and defining unbonded, spaced apart, generally parallel regions 14 of the first layer 100. In Figure 1, the unbonded regions 14 extend along substantially the entire length of the article 20. An adhesive, designated by the reference numeral 300 in the figures 1 and 2, can be used to join the first layer 100 to the second layer 200.
When the first layer is moistened, there is a tendency for the first layer 100 to expand along one or more directions in the plane of the first layer. (The plane of the first layer is parallel to the plane of Figure 1). However, due to the relatively lower wet extensibility of the second layer 200, the second layer limits the extension of the first layer 100 in the plane of the first layer. As a result, the unbonded regions 14 of the first layer 100 are deformed, such as by bulging or creasing in the Z direction, perpendicular to the plane of the first layer 100. Figure 3 A is a cross-sectional illustration of the article. conditioner and for cleaning 20 before moistening the first layer 100. As shown in Figure 3A, the cleaning article is generally flat before it is moistened. Figure 3B is a cross-sectional illustration similar to that of Figure 3 A, but showing the article 20 after the first layer 100 is moistened. Figure 3B shows the out-of-plane deformation of the first layer 100 upon wetting the first layer. layer 100. The Z direction is indicated in figures 3 A and 3B. The deformation of the first moistened layer 100 provides the article 100 with raised edges 120 which increase the wet texture, the wet gauge (thickness) and the wet volume of the article 20. In particular, the article 20 has a ratio of wet gauge at dry gauge which is larger than 1.0, and preferably at least 1.1. The ratio of wet gauge to dry gauge is a measurement of the thickness of article 20 before it is moistened. The ratio of wet gauge to dry gauge is measured according to the procedure "Wet gauge ratio to dry gauge" which is provided below. The raised edges 120 also provide sacks 150 disposed between the unattached portions of the first layer 100 and the underlying portions of the second layer 200. The openings 102 provide a flow path through which the liquids and / or small particles can flow. entering the bags 150. Additionally, because the article 20 is used with, or includes a foaming agent, as a surfactant, the openings 120 may assist in the incorporation of air during the foaming process, thus improving the generation of foam. For example, a portion of article 20 may be coated with or otherwise treated with a surfactant composition, as described more fully below. The article 20 can be moistened with water to activate the surfactant, and the flow of air generated through the openings 102 during the use of the article (eg washing or carving) can help to generate foam. The number and size of the openings 102 can influence the speed of foam generation and the quality of the foam produced. A relatively small number of relatively large openings 102 will tend to reduce the time required to generate foam, but will yield relatively large foam bubbles with a translucent appearance.
On the other hand, a relatively large number of relatively small apertures 102 will tend to reduce the size of the bubble, thereby increasing the creaminess and opacity of the foam, but at the expense of increasing the time required to generate foam. Between about 4 and about 100 openings per 2.54 cm2 can provide adequate foaming speed and quality.
First layer With reference to the components of article 20 in more detail, suitable materials from which the first layer 100 can be formed include pre-cut wet laid paper webs (such as by creping). Other suitable materials may include woven materials, non-woven materials, foams, wadding, and the like. The first layer 100 should be constructed to have a wet extensibility of at least 4 percent, more preferably at least 10 percent and even more preferably at least 20 percent. In one embodiment, first layer 100 has a wet extensibility of at least 25 percent. Preferably, the difference between the wet extensibility of the first layer and the wet extensibility of the second layer (the wet extensibility of the second layer subtracted from the wet extensibility of the first layer) is at least 4 percent, more preferably at least about 10 percent, and even more preferably at least about 20 percent.
The fibers or filaments of the first layer 100 may be natural (for example cellulosic fibers such as wood pulp fibers, cotton linters, rayon and bagasse fibers) or synthetic fibers (for example polyolefins, polyamides or polyesters), or combinations thereof. same. In a preferred embodiment, the first layer 100 comprises a wet-laid paper web of wood pulp cellulosic fibers which are pre-cut at least about 4 percent, more preferably at least 10 percent, and even more preferably at least 20 percent. percent, by dry matting. With reference to Figure 2, the first layer 100 is shown consisting of curled edges 105 corresponding to the foreshortening of the first layer 100. The machine direction (MD) and the machine cross direction (CD) are indicated in figures 1 and 2. The machine direction corresponds to the manufacturing direction of the paper web of the first layer 100. The curled edges 105 are generally perpendicular to the machine direction, and generally parallel to the machine cross-machine direction of the web. paper of the first layer 100. The paper web of the first layer 100 can have a basis weight of between 25 to about 45 grams per square meter. In one embodiment, the basis weight of the first layer 100 is about 33 grams per square meter. The openings 102 can be formed in the first layer 100 in a suitable manner. For example, the openings 102 may be formed in the first layer 100 during the formation of the paper web of the first layer 100, or alternatively, after the paper web of the first layer 100 is manufactured. embodiment, the paper web of the first layer 100 is produced in accordance with the teachings of one or more of the following US patents, which patents are incorporated herein by reference: US Patent No. 5,245,025, September 14, 1993 to Trokhan et al; patent of E.U.A. No. 5,277,761 of January 11, 1994 to Phan et al; and patent of E.U.A. No. 5,674,076 of August 5, 1997 to Trokhan et al. In particular, U.S. Patent No. 5,277,761 in column 10 describes the formation of the paper web having openings. Prior to moistening the first layer, the first crusted layer 100 can have between 4 and 300 apertures 102 by 2.54 cm 2 and more preferably between 4 and 100 apertures 102 by 2.54 cm 2. When wetting a grid of creped paper causes the network, if not restricted, expand in at least one direction, such as the machine direction, so that the number of openings 102 by 2.54 cm2 after wetting may be smaller than the number of openings by 2.54 cm2 before wetting. Similarly, when openings are formed in a paper web, and the paper web is subsequently creped, the number of openings by 2.54 cm2 before curling will be less than the number of openings by 2.54 cm 2 after frizz. Accordingly, references to the dimensions of the paper web refer to the dimensions after curling and before wetting. The openings 102 may comprise between 15 and about 75 percent of the total surface of the first layer 100. The openings 102 shown in Figure 2 are staggered bilaterally (staggered in the machine and machine transverse directions) in a pattern repeated, not random. In one embodiment, the first layer 100 comprises a paper web which is 25 percent dry-matched (25 percent pre-trimmed) with a wet extensibility greater than 25 percent, and has approximately 40 to 50 apertures 102 by 2.54 cm2, the openings 102 have a length of 0.254 to 0.457 centimeters and a width 104 of 0.177 to 0.381 centimeters. The paper web is manufactured by first forming an aqueous papermaking furnish. The supply material comprises papermaking fibers, and may additionally consist of several additives. U.S. Patent No. 5,223,096 of June 29, 1993 to Phan et al, is incorporated herein by reference. For the purpose of describing various wood pulps and papermaking additives. A paper web suitable for manufacturing the first layer 100 can be manufactured according to the following description. A papermaking supply material is prepared from highly refined kraft water and pulp derived from northern softwoods (NSK), the paper supply material having a fiber consistency of about 0.2 percent (weight of dry fiber divided by the total weight of the supply material equal to 0.002). A dry strh additive such as carboxymethylcellulose (CMC) is added to the 100% NSK supply material in an amount of about 2,721 kg of CMC solids per ton of dry fibers for papermaking. A wet strh additive such as Kymene 557H (available from Hercules, Inc. of Wilmington, Del.) Is added to the supply material in the amount of 10,884 kg of Kymene solids per tonne of dry fibers for papermaking. With reference to Figure 4, the supply material is deposited from a feed head 500 of a papermaking machine to a forming element 600 at a fiber consistency of about 0.2 percent. The forming element 600 is in the form of a continuous band in Figure 4. The gaseous pulp of papermaking fibers is deposited on the forming element 600, and the water is drained from the slurry through a watering element. forming 600 to form an embryonic fiber network for papermaking designated by reference number 543 in Figure 4. Figure 5 shows a portion of forming element 600. The forming element 600 has two mutually opposite faces. The face shown in Figure 5 is the face that contacts the papermaking fibers of the network being formed. A description of a training element of the type shown in Figure 5 is provided in the U.S. Patents. Nos. 5,245,025; 5,277,761 and 6,654,076 mentioned above. The forming element 600 has flow restricting members in the form of resin protuberances 659. The forming element 600 shown comprises a pattern arrangement of protuberances 659 attached to a reinforcing structure 657, which may comprise a foraminous element, such as a non-woven mesh or other structure with openings. The protuberances 659 extend above the reinforcing structure 657. A suitable forming element 600 has approximately 37 protuberances 659 by 2.54 cm2 of surface of the forming element 600, with the protuberances 659 covering approximately 35 percent of the surface of the element. of formation 600, as seen in Figure 5, and the protuberances extend 0.064 cm above the reinforcing structure 657. The protrusions may have a machine direction length X of about 0.457 cm and a direction Y width machine cross section of approximately 0.355 cm. The reinforcing structure 657 is substantially fluid permeable, while the protuberances 659 are substantially fluid impervious. Accordingly, as the liquid in the papermaking supply material is drained through the forming element, the papermaking fibers in the supply material will be retained on the reinforcing structure 657, leaving openings in the fabric. embryonic network 543 which generally correspond in shape, size and location to the size, shape and location of the protuberances 659. Referring again to Figure 4, the embryonic network 543 is transferred to a conventional dehumidifier felt 550 with the aid of an apparatus 560 Vacuum Transition Transition. The network 543 is transferred to the felt 550 at a fiber consistency of about 4 percent. The network 543 is transferred over the felt 550 to a juicer 570 formed between a vacuum pressure roller 572 and a Yankee dryer drum 575. The network 543 is dried on the Yankee drum 575 at a fiber consistency of about 96 percent, at which point the net is curled from the Yankee drum 575 with a spatula 577 having a bevel angle of about 25 degrees and an impact angle of about 81 degrees. The net is entangled on a reel at a speed (0.304 linear meters per second) that is 25 percent slower than the surface speed of the Yankee drum (reel speed equal to 0.75 of the Yankee drum speed) to pre-cut the network approximately 25 percent. The precut network can have a basis weight of approximately 33 grams per square meter, a thickness of approximately 304.8 to 330.2 microns (0.03 to 0.033 cm) as measured with a confining pressure of 95 grams per 2.54 cm2 and a loading foot that It has a diameter of 5.08 cm. The pre-cut web can be used to form a first layer 100 having a wet extensibility of at least about 25 percent.
Second layer With reference again to Figures 1, 3 A, and 3B, the first layer 100 is attached to the second layer 200 to limit the extension of selected portions of the first layer 100 when the first layer is wetted. The second layer 200 has a lower wet extensibility than that of the first layer 100. Suitable materials from which the second layer 200 can be formed include woven materials, nonwovens, foams, wadding, and the like. Particularly preferred materials are non-woven webs having fibers or filaments randomly distributed as in "air laying" or certain "wet laying" procedures, or with a degree of orientation, as in certain "wetting" procedures. wet laid "and" carded ". A material from which the second layer 200 can be formed is a nonwoven web formed by hydroentangling fibers. A suitable hydroentangulated network is a non-woven, hydroentangled network comprising about 50 weight percent rayon fibers and about 50 weight percent polyester fibers, and having a basis weight of about 62 grams per square meter. A suitable non-woven, hydroentangled network is commercially available from PGI Nonwovens de benson, N.C. under the designation Chicopee 9931.
Adhesion Referring again to Figures 1, 3 A, and 3B, selected portions of the first layer 100 are bonded directly (or indirectly as by a third component) to the second layer 200 in a predetermined adhesion pattern. to provide a plurality of adhered and non-adhered regions of the first layer 100. In Figures 1 and 2, the adhered regions are designated 1 10, and the non-adhered regions are designated 1 14. Each of the first and second layers 100 and 200 may have a machine direction, and the first and second layers may be adhered so that the machine direction of the first layer is generally parallel to the machine direction of the second layer. The first layer 100 and the second layer 200 may be joined using any suitable method, including but not limited to adhesion by adhesive, mechanical adhesion, thermal adhesion, thermo-mechanical adhesion, ultrasonic adhesion and combinations thereof. In one embodiment, the first layer 100 and the second layer 200 can be bonded with an adhesive 300 applied to select portions of the second layer 200. The adhesive is preferably water-insoluble so that the article 20 can be moistened with water without delamination. the first and second layers. The adhesive is also preferably tolerant to the surfactant. By "surfactant tolerant" it means that the adhesion characteristics of the adhesive are not degraded by the presence of surfactants. Suitable adhesives include hot melt adhesives based on EVA (ethylene vinyl acetate). A suitable adhesive is a hot melt adhesive commercially available as H 1382-01 from Findley Adhesives of Wauwatos, Wiscons. With reference to Figures 1 and 2, the hot melt adhesive can be applied to the second nonwoven layer 200 in bands extending generally parallel to the machine direction of the second nonwoven layer 200. The hot melt adhesive can be applied to webs 310 having a width W (Fig. 1) of about 0.31 cm to 2.54 cm. The spacing D between adjacent adhesive bands can be from about 0.31 cm to 5.08 cm. In Figure 1, five bands 310 A, 310B, 310C, 310D, and 310E are shown. In one embodiment, the width W of the bands 310 A, 310 C and 310 E can be approximately 1.27 cm, the width W of the bands 310 B and 310 D can be approximately 0.63 cm, and the spacing between adjacent bands can be approximately 2.54. cm. The adhesive can be applied to the second nonwoven layer 200 using a slot coating applicator. A suitable slot coating applicator is a Nordson MX series of hot melter with extrusion head commercially available from Norcross Company of Norcross, Ga. The H1382-01 adhesive referred to above can be applied to the second layer 200 at a temperature of 176.6 ° C at an application level of about 0.03 grams of adhesive per 2.54 cm2. Immediately following the application of the adhesive to the second nonwoven layer 200, the second nonwoven layer 200 and the first paper layer 100 can be joined together by pressing the two layers 100 and 200 together with an adhesive disposed between the second layer 200. and the first layer 100. A suitable means for pressing the two layers 100 and 200 together is by passing the two layers through a juicer formed between two rollers, with the rollers loaded to provide roller pressure suitable for adhesion. The resulting laminate of the first and second layers may have an average dry gauge of approximately 723.9 microns (0.072 cm), and an average wet gauge of approximately 815.3 microns (0.081 cm), and a wet-gauge to gauge ratio in dry of about 1.1. Dry gauge, wet gauge, and dry caliber wet gauge ratio are measured as described below under "Wet gauge to dry caliper ratio". The laminate resulting from the first and second layers has joined regions, generally rectangular, spaced apart, and unbonded regions 14, generally rectangular, spaced apart. Alternatively, the first and second layers 100 and 200 may be joined together to provide different patterns of joined and unattached regions. For example, the adhesive could be applied in a continuous network to the second layer 200, to provide a continuous joined region 10 and small unbonded regions 14 having a suitable shape, including but not limited to circles, ovals, triangles, diamonds and similar.
Wet extensibility test The wet extensibility of a layer, such as layer 100 or layer 200, is determined using the following procedure. The samples are conditioned at 21.1 ° C and 50 percent relative humidity for two hours before the test. First, the direction of the largest wet extensibility in the plane of the layer is determined. For dry-matched paper webs, this address will be parallel to the machine direction, and generally perpendicular to the creped edges. If the direction of the largest wet extensibility is not known, the direction can be determined by cutting seven samples of a sheet with sample lengths oriented between 0 degrees and 90 degrees, inclusive, with reference to a line drawn on the sheet. The samples are then measured as set forth below to determine the direction of the greatest wet extensibility. Once the direction of the largest wet extensibility is determined, 8 samples are cut to have a length of approximately 17.78 cm measured parallel to the direction of the greatest wet extensibility, and a width of at least 2.54 cm. Samples are cut from unattached portions of layers 100 and 200, or, if unattached portions having the above dimensions can not be cut from article 20, then samples of layers 100 and 200 are cut before adhering the layers together . Two marks are placed on each sample, as with an ink pen. The marks are spaced apart 12.7 cm as measured parallel to the direction of the largest wet extensibility. This length of 12.7 cm is the length of the initial dry sample test. Each sample is intensely moistened by immersing the sample in distilled water for 30 seconds in a water bath. Each sample is removed from the water bath and immediately held to hang vertically so that a line through the two marks is generally vertical. The wet sample is held in such a way that the support does not interfere with the extension between the two marks (for example with a fastener which does not contact the sample between the two marks). The length of the wet test of the sample is the distance between the two marks. The distance is measured within 30 seconds of removing the sample from the water bath. For each sample, the wet extension of the sample is calculated as follows: Wet sample extension = [wet test length - initial dry test length (12.7 cm)] / (initial dry test length) x 100 For example, for a measured wet length of 16.51 cm and a dry length of 12.7 cm, the wet extension is [(16.51-12.7) /12.7] x 100 = 30 percent. The wet extensibility of the samples is the average of the 8 calculated wet extension values of the sample.
Wet gauge to dry gauge ratio The ratio of wet gauge to dry gauge is measured using the following procedure. The samples are conditioned at 21.1 ° C and 50 percent relative humidity for two hours before the test. The dry bore of article 20 is measured using a confining pressure of 95 grams per 2.54 cm2 and a loading foot that has a diameter of 5.08 cm. The dry caliber is measured for eight samples. For each sample, the gauge is measured with the loading foot centered over an unbound region of the first layer 100. The eight gauge measurements are averaged to provide an average wet gauge. Each sample is then moistened by immersing the sample in a bath of distilled water for 30 seconds. The sample is then removed from the water bath. The size of the wetted sample is measured within 30 seconds of removing the sample from the bath. The wet caliber is measured in the same location in which the dry caliber was previously measured. The eight wet-gauge measurements are averaged to provide an average wet gauge.
The ratio of wet caliber to dry caliber is the average wet caliber divided by the average dry caliber.
II.- Foaming surfactant The articles of the present invention comprise from about 0.5% to about 12.5%, preferably from about 0.75% to about 11% and more preferably from about 1% to about 10%, based in the weight of water insoluble substrate, of a foaming surfactant. By "sudsing surfactant" is meant a surfactant which, when combined with water and mechanically stirred, generates a foam or suds. Preferably, these surfactants or combinations of surfactants should be soft, which means that these surfactants provide sufficient cleansing or detersive benefits, but do not dry the skin or hair too much and still meet the foaming criteria described above. . A wide variety of foaming surfactants are useful herein and include those selected from the group consisting of anionic lathering surfactants, nonionic foaming surfactants, amphoteric lathering surfactants, and mixtures thereof. The cationic surfactants can be used as optional components, provided they do not negatively impact the total foaming characteristics of the required foaming surfactants.
A. Anionic Foaming Means Surfactants Non-limiting examples of anionic foaming surfactants useful in the compositions of the present invention are described in McCutcheon's, Detergents and Emulsifiers, North American edition (1986), published by Allured Publishing Corporation; McCutcheon's, Functional Materials, North American Edition (1992); and U.S. Patent No. 3,929,678 to Laughlin et al., issued December 30, 1975, all of which are hereby incorporated by reference in their entirety. A wide variety of anionic foaming surfactants is useful here. Non-limiting examples of anionic foaming surfactants include those selected from the group consisting of sarcosinates, sulfates, isethionates, taurates, phosphates and mixtures thereof. Among the isethionates, the alkylisethylethates are preferred and among the sulphates, the alkyl and alkyl ether sulfates are preferred. Typically, the alkylisethionates have the formula RCO-OCH2CH2SO3M wherein R is alkyl or alkenyl of about 10 to about 30 carbon atoms and M is a water-soluble cation such as ammonium, sodium, potassium and triethanolamine. Non-limiting examples of these isethionates include the allyl isethionates selected from the group consisting of ammonium cocoyl isethionate, sodium cocoyl isioneate, sodium lauroyl isethionate and mixtures thereof. Alkyl sulfates and ether sulfates typically have the respective formulas ROS3M and RO (C2H4O) xSO3M, wherein R is alkyl or alkenyl of about 10 to about 30 carbon atoms, x is about 1 to about 10, and M is a cation soluble in water such as ammonium, sodium, potassium and triethanolamine. Another suitable class of anionic surfactants are the water-soluble salts of organic, sulfuric acid reaction articles of the general formula: Ri- -SO3-M wherein R1 is selected from the group consisting of a saturated aliphatic hydrocarbon radical of chain straight or branched having from about 8 to about 24, preferably from about 10 to about 16 carbon atoms; and M is a cation. Still other synthetic anionic surfactants include the class designated as succinamates, olefin sulfonates having from about 12 to about 24 carbon atoms., and b-alkyloxyalkanesulfonates. Examples of these materials are sodium lauryl sulfate and ammonium lauryl sulfate. Other anionic materials include sarcosinates, non-limiting examples of which include sodium lauryl sarcosinate, sodium cocoyl sarcosinate, and ammonium lauryl sarcosinate. Other anionic materials useful herein are soaps (e.g., alkali metal salts, e.g., sodium or potassium salts) or fatty acids, typically having from about 8 to about 24 carbon atoms, preferably from about 10 to about 20 carbon atoms. The fatty acids used to manufacture the soaps can be obtained from natural sources such as, for example, glycerides derived from plants or animals (for example, palm oil, coconut oil, soybean oil, castor oil, tallow, butter, etc.). Fatty acids can also be prepared synthetically. The soaps are described in more detail in the U.S. patent. No. 4,557,853, cited above. Other anionic materials include phosphates such as monoalkyl, dialkyl and trialkyl phosphate salts. Other anionic materials include alkanoylsarcosinates corresponding to the formula RCON (CH3) CH2CH2CO2M, in which R is alkyl or alkenyl of about 10 to about 20 carbon atoms, and M is a water-soluble cation such as ammonium, sodium, potassium and trialkanolamine (for example, triethanolamine), a preferred example of which is sodium lauroyl sarcosinate. Taurates that are based on taurine, which is also known as 2-aminoethanesulfonic acid, are also useful. Examples of taurates include N-alkyl taurines such as the one prepared by reacting dodecylamine with sodium isethionate in accordance with what is taught in the US patent.
No. 2,658,072 which is incorporated herein by reference in its entirety. Lactylates are also useful. Non-limiting examples of lactylates include sodium lauroyl lactylate, sodium cocoyl lactylate, ammonium lauroyl lactylate, caprylic lactylate, and triethanolamine lauroyl lactylate ('TEA'). Non-limiting examples of preferred anionic lathering surfactants useful in present include those selected from the group consisting of sodium lauryl sulfate, ammonium lauryl sulfate, ammonium laureth sulfate, sodium laureth sulfate, sodium tridecetsulfate, ammonium cetyl sulfate, sodium cetyl sulfate, ammonium cocoyl isethionate, sodium lauroyl isethionate, sodium lauroyl lactylate, triethanolamine lauroyl lactylate, sodium lauroyl sarcosinate and mixtures thereof Especially preferred for use herein are ammonium lauryl sulfate and ammonium laureth sulfate, sodium lauroyl lactylate, capryl lactylate, and triethanolamine lauroyl lactylate.
B. Non-ionic Foaming Means Non-limiting examples of non-ionic foaming surfactants for use in the compositions of the present invention are described in McCutcheon's, Detergents and Emulsifiers, North American edition (1986), published by Allured Publishing Corporation; and McCutcheon's, Functional Materials, North American Edition (1992); both of which are incorporated by reference herein in their entirety. Nonionic foaming surfactants useful herein include those selected from the group consisting of alkyl glycosides, alkyl polyglycosides, polyhydroxy fatty acid amides, alkoxylated fatty acid esters, sucrose esters of foaming, amine oxides and mixtures of the same. The alkyl glycosides and alkyl polyglucosides are useful herein and can be broadly defined as condensation products of long chain alcohols, for example, C8-3o alcohols, with sugars or starches or sugar or starch polymers, for example glycosides or polyglycosides. These compounds can be represented by the formula (S) n-O-R in which S is a sugar portion such as glucose, fructose, mannose and galactose; n is an integer from about 1 to about 1000, and R is an alkyl group of C8-30. Examples of long chain alcohols from which the alkyl group may be derived include decyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, myristyl alcohol, oleyl alcohol, and the like. Preferred examples of these surfactants include those in which S is a portion of glucose, R is an alkyl group of C8-20, and n is an integer from about 1 to about 9. Commercially available examples of these surfactants include decylpolyglucoside ( available as APG 325 CS from Henkel) and lauryl polyglucoside (available as APG 600CS and 625 CS from Henkel). Also useful are sucrose ester surfactants such as sucrose cocoate and sucrose laurate. Other useful nonionic surfactants include polyhydroxy fatty acid amide surfactants, more specific examples of which include glucosamides, corresponding to the structural formula: OR 1 9"R¿ C- -N- in which R1 is H, C?-C, 2-hydroxyethyl, 2-hydroxypropyl, preferably C 1 -C 4 alkyl, more preferably methyl or ethyl, more preferably still methyl R2 is C5-C31 alkyl or alkenyl, preferably C7-C9 alkyl or alkenyl, more preferably Cg-C7 alkyl or alkenyl, more preferably still C-11 alkyl or alkenyl, and Z is a polyhydroxyhydrocarbyl moiety having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative (preferably ethoxylated or propoxylated) thereof: Z is preferably a sugar portion selected from the group consisting of glucose, fructose, maltose, lactose, galactose, mannose, xylose and mixtures thereof. An especially preferred surfactant corresponding to the aforementioned structure is cocoalkyl N-methylglucosidoamide (ie, in which the portion R CO- is derived from fatty acid of coconut oil). Methods for making the polyhydroxy fatty acid amide containing compositions are described, for example, in Great Britain Patent Specification 809,060, published February 18, 1959 by Thomas Hedley &; Co., Ltd .; patent of E.U.A. No. 2,965,576, by E.R. Wilson, issued December 20, 1960; patent of E.U.A. No. 2,703,798, by A.M. Schwartz, issued on March 8, 1955 and patent of E.U.A. No. 1, 985,424 of Piggott, issued on December 25, 1934; which are incorporated herein by reference in their entirety. Other examples of nonionic surfactants include amine oxides. The amine oxides correspond to the general formula of R 1 R 2 R 3 NO, in which R 1 contains an alkyl, alkenyl or monohydroxyalkyl radical of from about 8 to about 18 carbon atoms, from 0 to about 10 portions of ethylene oxide and from 0 to about 1 glyceryl moiety, and R2 and R3 contain from about 1 to about 3 carbon atoms and from 0 to about 1 hydroxy group, for example methyl, ethyl, propyl, hydroxyethyl or hydroxypropyl radicals. The arrow in the formula is a conventional representation of a semipolar link. Examples of amine oxides suitable for use in this invention include dimethyl dodecylamine oxide, oleyl di (2-hydroxyethyl) amine oxide, dimethyloctylamine oxide, dimethyl-decylamine oxide, dimethyl-tetradecylamine oxide, 3,6,9-oxide. trioxaheptadecyldietylamine, d, (2-hydroxyethyl) -tetradecylamine oxide, 2-dodecoxyethyldimethylamine oxide, 3-dodecoxy-2-hydroxypropyldi (3-hydroxypropyl) amine oxide, dimethylhexadecylamine oxide. Non-limiting examples of preferred nonionic surfactants for use herein are those selected from the group consisting of C8-C14 glucosamides, C8-C14 alkyl polyglycosides, sucrose cocoate, sucrose laurate, lauramine oxide, cocoamine oxide and mixtures thereof.
Amphoteric Foaming Surfactant The term "amphoteric foam forming surfactant" as used herein, is also designed to encompass zwitterionic surfactants, which are well known to formulators skilled in the art as a subset of agents amphoteric surfactants. A wide variety of amphoteric foaming surfactants can be used in the compositions of the present invention. Particularly useful are those which are broadly described as derivatives of secondary and tertiary aliphatic amines, preferably in which the nitrogen is in a cationic state, in which the aliphatic radicals can be direct or branched chains and in which one of the radicals contains a group soluble in ionizable water, for example, carboxy, sulfonate, sulfate, phosphate or phosphonate. Non-limiting examples of amphoteric surfactants useful in the compositions of the present invention are described in McCutcheon's, Detergents and Emulsifiers. North American edition (1986), published by Publishing Corporation; and McCutcheon's, Functional Materials, North American Edition (1992); both of which are incorporated by reference to the present in its entirety.
Non-limiting examples of amphoteric or zwitterionic surfactants are those which are selected from the group consisting of betaines, sultaines, hydroxysultaines, alkyliminoacetates, iminodialkanoates, aminoalkanoates and mixtures thereof. Examples of betaines include higher alkyl betaines, such as cocodimethylcarboxymethylbetaine, lauryldimethylcarboxymethylbetaine, lauryldimethylalphacarboxyethylbetaine, cetyldimethylcarboxymethylbetaine, cetyl dimethylbetaine (available as Lonzaine 16SP from Lonza Corp.), lauryl bis- (2-hydroxyethyl) carboxymethylbetaine, oleyldimethylgamma-carboxypropylbetaine, lauryl bis- (2-hydroxypropyl) alpha-carboxyethylbetaine, cocodimetiisulfopropylbetaine, lauryldimethylsufoethylbetaine, lauryl bis- (2-hydroxyethyl) sulfopropylbetaine, amidobetaine and amidosulfobetaines (in which the radical RCOHN (CH2) 3 is bonded to the nitrogen atom of betaine), oleylbetaine (available as Velvetex OLB- Amphoteric Henkel) and cocamidopropyl betaine (available as Velvetex BK-35 and BA-35 from Henkel). Examples of sultaines and hydroxysultaines include materials such as cocamidopropylhydroxysultaine (available as Mirataine CBS from Rhone-Poulenc). Preferred amphoteric surfactants for use herein have the following structure: O R R1- (C-NH- (CH2) m) n-N-R4-X R3 wherein R1 is unsubstituted, saturated or unsaturated, straight or branched chain alkyl having from about 9 to about 22 carbon atoms. The preferred R1 has from about 11 to about 18 carbon atoms; more preferably about 12 about 18 carbon atoms; more preferably still from about 14 to about 18 carbon atoms; m is an integer from about 1 to about 3, more preferably from about 2 to about 3 and more preferably from about 3; n is 0 or 1, preferably 1; R2 and R3 are independently selected from the group consisting of alkyl having 1 to about 3 carbon atoms, unsubstituted or monosubstituted with hydroxy, preferred R2 and R3 are CH3; X is selected from the group consisting of the group consisting of CO2, SO3 and SO4; R4 is selected from the group consisting of saturated or unsaturated alkyl, straight or branched chain, unsubstituted or monosubstituted with hydroxy, having from 1 to about 5 carbon atoms. When X is CO2, R4 preferably has 1 or 3 carbon atoms, more preferably 1 carbon atom. When X is SO3 or SO4, R4 preferably has from about 2 to about 4 carbon atoms, more preferably 3 carbon atoms.
Examples of amphoteric surfactants of the present invention include the following compounds: Cetyldimethylbetaine (this material also has the designation CTFA cetylbetaine) Cocamidopropylbetaine wherein R has from about 9 to about 13 carbon atoms.
Cocamidopropylhydroxysultaine wherein R has from about 9 to about 13 carbon atoms. Examples of other useful amphoteric surfactants are alkyliminoacetates and iminodyalkanoates and aminoalkanoates of the formulas RN [(CH2) mCO2M] 2 and RNH (CH2) mCO2M, wherein m is from 1 to 4, R is an alkyl or alkenyl of C8- C22, and M is H, alkali metal, earth alkali metal ammonium or alkanolammonium. Also, imidazolinium and ammonium derivatives are included. Specific examples of suitable amphoteric surfactants include sodium 3-dodecyl aminopropionate, sodium 3-dodecylaminopropansulfonate, higher N-alkyl aspartic acids as produced in accordance with what is taught in the US patent. 2,438,091 which is incorporated herein by reference in its entirety; and the products sold under the trade name "Miranol" and described in US patent. 2,528,378, which is incorporated herein by reference in its entirety. Other examples of useful amphoteric include amphoteric phosphates, such as chloride-phosphate coamidopropyl PG-dimonium (commercially available as Monaquat PTC, from Mona Corp.). Also useful are amphoacetates such as disodium lauroamphodiacetate, sodium lauroamphoacetate and mixtures thereof. Preferred foaming surfactants for use herein are the following, in which the anionic lathering surfactant is selected from the group consisting of ammonium lauroyl sarcosinate, sodium tridecetsulfate, sodium luroyl sarcosinate, ammonium laureth sulfate. , sodium laureth sulfate, ammonium lauryl sulfate, sodium lauryl sulfate, ammonium cocoyl isethionate, sodium cocoyl isethionate, sodium lauroyl isethionate, sodium cetyl sulfate and mixtures thereof; wherein the nonionic foam forming surfactant is selected from the group consisting of lauramine oxide, cocoamine oxide, decyl polyglucose, lauryl polyglucose, sucrose cocoate, C12-14 glucosamides, sucrose laurate and mixtures thereof; and wherein the amphoteric foam-forming surfactant is selected from the group consisting of disodium lauroamphodiacetate, sodium lauroamphoacetate, cetyldimethylbetaine, cocoamidopropylbetaine, cocoamidopropylhydroxysultaine, and mixtures thereof.
III.- Fragrance Component The personal cleansing articles of the present invention comprise from 0.01% to approximately 20%, preferably from 0.015% to approximately 15%, more preferably from 0.02% to approximately 10%, by weight of the substrate, of a fragrance release complex. The fragrance release complex comprises a porous fragrance carrier and a fragrance that is impregnated within the fragrance carrier. Preferred fragrance release complexes are those that (i) protect the fragrance from loss, oxidation, and chemical reaction, before use by the consumer and (ii) effectively release the fragrance when moistened with an aqueous solution, by example, water. The ratio of the fragrance to the fragrance carrier within the fragrance release complex is in the range from about 5: 1 to about 1: 10, preferably from about 5: 1 to about 1: 2, more preferably about 2: 1. to about 1: 2, depending on the absorption capacity of the fragrance carrier. When a fragrance carrier with a high absorption capacity is used, the ratio of fragrance to fragrance carrier is about 1: 10. For fragrance carriers with moderate absorption capacities, the fragrance: fragrance carrier ratio is on a scale of 5: 1 to 1: 10. Some typical fragrance: fragrance carrier relationships for certain key fragrance carriers are listed in the chart below: The fragrance The fragrance release complex comprising the personal cleansing products of the present invention comprises from about 1% to about 90%, preferably from about 15% to about 80%, more preferably from about 40% to about 70% in weight of the complex, of a fragrance. As used herein, the term "fragrance" may include perfume ingredients, cooling agents and other tactile agents, or a combination thereof. The perfume ingredients employed in the personal cleansing products of the present invention are the conventional ones known in the art. Even perfume ingredients that are unstable due to volatility (as exhibited by changes in intensity) or discoloration when used in pure form are stable and suitable for use in the personal cleansing products of the present invention when they are impregnated in a fragrance carrier as described above. As used herein, a fragrance is considered "stable" if the fragrance exhibits no appreciable changes in color or intensity and exhibits no appreciable loss due to volatility after 10 days at 48.8 ° C. Suitable perfume compositions and compositions can be found in the art, including US patents. Nos. 4,145,184, Brain and Cummins, issued March 20, 1979; 4,209,417, Whyte, issued June 24, 1980; 4,515,705, Moeddel, issued May 7, 1985 and 4,152,272, Young issued May 1, 1979, U.S. Patent No. 5,378,468 to Suffis et al, January 3, 1995; U.S. Patent No. 5,266,592 Grub et al, November 30, 1993; patent of E.U.A. No. 5,081, 1 1 1 Akimoto et al, January 14, 1992; patent of E.U.A. No. 4,994,266, Wells, February 19, 1991; patent of E.U.A. No. 4,524,018, Yemoto et al, June 18, 1985; patent of E.U.A. No. 3,849,326, Jaggers et al, November 19, 1974; patent of E.U.A. No. 3,779,932 Jaggers et al, December 18, 1973; JP 07-179,328 of July 18, 1995; JP 05-230496 of September 7, 1993; WO 96/38528, December 5, 1996; and WO 95/16660 of June 22, 1995; all of these patents and references being incorporated herein by reference.
In addition, P.M. Muller, D.Lamparsky Perfumes Art, Science, & Technology Blackie Academic and Professional, (New York, 1994), is included herein by reference. Perfumes can be classified according to their volatility. The highly volatile, low boiling perfume ingredients typically have boiling points of less than about 250 ° C or lower. Low-boiling, moderately volatile perfume ingredients are those having boiling points from about 250 ° C to about 300 ° C. The high-boiling and less volatile perfume ingredients are those that have boiling points of about 300 ° C or higher. Many of the perfume ingredients are described hereinafter, along with their odor and / or taste characteristics, and their physical and chemical properties, such as boiling point and molecular weight, are given in "Perfume and Flavor Chemical (Aroma) Chemicals) "," Steffen Arctander, published by the author, 1969, incorporated herein by reference Examples of the low-boiling and highly volatile perfume ingredients are: anethole, benzaldehyde, benzyl acetate, benzyl alcohol , benzyl formate, isopropyl acetate, camphene, cis-citral (neral), citronellal, citronellol, citronellyl acetate, para-cymene, decanal, dehydrolinool, dihydromyrcenol, dimethylphenylcarbinol, eucalyptol, geranial, geraniol, geranyl acetate, geranyl nitrile, cis-3-hexenyl acetate, hydroxycitronellal, d-limonene, linalool, linalool oxide, linalyl acetate, linalyl propionate, methyl anthranilate, alpha-methylionone, methyl acetaldehyde nonyl, methylphenylcarbinyl acetate, laevo-menthyl acetate, menthone, iso-menthone, myrcene, myrcenyl acetate, mircenol, nerol, neryl acetate, nonyl acetate, phenylethyl alcohol, alpha-pinene, beta-pinene, gamma-terpinene , alpha-terpineol, beta-terpineol, terpinyl acetate and vertenex (para-tertiary-butylcyclohexyl acetate). Some natural oils also contain large percentages of highly volatile perfume ingredients. For example, bleach contains as main components: linalool, linalyl acetate, geraniol and citronellol. Lemon oil and orange terpenes contain both approximately 95% d-limonene. Examples of moderately volatile perfume ingredients are: amylcinnamic aldehyde, isoamyl salicylate, beta-caryophyllene, cedrene, cinnamic alcohol, coumarin, dimethyl benzyl carbinyl acetate, ethyl vanillin, eugenol, iso-eugenol, flower acetate, eliotropin, sodium salicylate, 3-cis-hexenyl, hexyl salicylate, lilial (para-tertiary butyl-alpha-methyl hydroxylamic aldehyde), gamma-methyl ionone, nerolidol, patchouli alcohol, phenyl hexanol, beta-selinolyl, trichloromethyl phenyl carbinyl acetate, citrate triethyl, vanillin and veratraldehyde. Cedar wood terpenes are mainly composed of alpha-cedrene, beta-cedrene and other sesquiterpenes of CI 5H24. Examples of the less volatile high-boiling perfume ingredients are: benzophenone, benzyl salicylate, ethylene brasilate , galaxolide (1, 3,4,6,7,8-hexhydro-4,6,6,7,8,8-hexamethyl-cyclopenta-gamma-2-benzopyran), hexyl cinnamic aldehyde, lyral, (4- (4 -hydroxy-4-methyl pentyl) -3-cyclohexane-10-carboxaldehyde), methyl cedrilone, methyl dihydro-jasmonate, methyl-beta-naphthyl ketone, mustard indanone, muskyl ketone, musk tibetan and phenylethylethylphenyl acetate. As indicated hereinabove, the fragrance used in the personal cleansing products of the present invention may also consist of a cooling agent or a combination of cooling agents. Cooling agents are compounds that directly affect those nerve endings that are responsible for hot or cold sensations. Suitable cooling agents are menthol, acrylic or menthol-based carboximides, camphor, eucalyptus, and acyclic or menthol-based chelates. Particularly preferred cooling agents for use in the personal cleansing products of the present invention are those that are selected from the group consisting of 3-1-methoxypropane-1., 2-diol, N-substituted-p-mentane-3-carboxamides and acyclic carboxamides and mixtures thereof. 3-1-methoxypropane-1,2-diol is fully described in detin U.S. Patent No. 4,459,425 of July 10, 1984, to Amano et al, incorporated herein by reference in its entirety. This volatile aromatic is commercially avble, such as TK-10 from Takasago Perfumery Co., Ltd., Tokyo, Japan. The N-substituted-p-mentane-3-carboxamides are fully described in detin U.S. Patent No. 4,459,163 to Watson et al, January 23, 1979, incorporated herein by reference in its entirety. The most preferred cooling agent of this class is N, 2,3-trimethyl-2-isopropyl-butanamide which is commercially avble as WS-23 from Wilkinson Sword Limited. Preferred to be used herein is a mixture of 3-1-methoxypropane 1,2-diol, N-ethyl-p-methane-3-carboxamide and N, 2,3-trimethyl-2-isopropylbutanamide in a ratio of 1: 75:42, respectively.
The fragrance carrier The fragrance release complex used in the personal cleansing products of the present invention comprises from about 10% to about 90%, preferably from 20% to about 85%, more preferably from about 30% to about 60% in weight of the complex, of a porous fragrance carrier. The fragrance carrier is typically present in the personal cleansing products of the present invention at a level in the range of 0.01% to about 10%, preferably from 0.1% to about 5%, more preferably from 0.2% to about 2% in substrate weight. Fragrance carriers improve the fragrance supply. By "improve the fragrance supply" it means that the stability of the fragrance and the evanescence of the fragrance in use are improved. The fragrance carriers used in the personal cleansing products of the present invention comprise particles having a diameter of from 0.001 microns to about 50 microns, preferably from about 0.01 microns to about 20 microns, more preferably from about 0.1 microns to about 10 microns . As used herein, a "carrier particle" means a particle that traps a fragrance (e.g., perfume oil) in the personal dry cleaning product (e.g., pure) and releases trapped fragrance when the product is moistened. Suitable carrier particles include, but are not limited to, cyclodextrins, silicas (e.g., fuming silica, colloidal silica, spheroidal silica, amorphous silica, precipitated silica, and calcium silicate), starches, (e.g., porous starch and agglomerated starch), polymethacrylate copolymers, and mixtures thereof, as described in U.S. Patent No. 5,236,615 to Trinh et al, August 17, 1993; patent of E.U.A. No. 5,139,687, to Borgher Sr. Et al, of August 18, 1992; patent of E.U.A. No. 5,552,378, to Trinh et al, September 3, 1996; patent of E.U.A. No. 5,246.61 1 to Trinh et al, September 21, 1993; patent of E.U.A. No. 5,112,612 to Garvey et al, May 12, 1992; patent of E.U.A. No. 5,292,533 to McMahon et al, March 8, 1994; patent of E.U.A. No. 5,466,460 to McMahon et al, November 14, 1995; patent of E.U.A. No. 5,376,287 to Borcher Sr. Et al, of December 27, 1994; All mentioned patents are incorporated herein by reference in their entirety. One type of inorganic carriers suitable for use herein include amorphous silica, precipitated silica, fuming silica and aluminosilicates such as zeolite and alumina with a pore volume of at least 0.1 ml / g consisting of pores with a diameter between 4 and 100. A, which by their nature are hydrophilic. Preferably amorphous silica gel is used due to its high oil absorption capacity: The silica gel particles include Syloid® silicas as the numbers: 72; 74; 221; 2. 3. 4; 235; 244; etc. Syloid® silicas are available from W.R.Grace & Co., Davison Chemical Division, P.O.Box 2117, Baltimore, Maryland 21203. Said particles have surface areas of from 250 to about 340 m2 / g, pore volumes from 1.1 to about 1.7 cc / g; and average particle sizes from 2.5 to about 6 microns. The fumed silica particles have primary particle diameters of from 0.007 to about 0.025 microns and include the numbers Cab-O-SilR: L-90; LM-130; LM-5; PTG; MS-55; HS-5; and EH-5. Cab-O-Sil® silicas are available from Cabot Corp., P.O.Box 188, Tuscola, Illinois 61953. It is preferred that only minimal amounts of other materials be present when the perfume is added to the silica particles to maximize adsorption. It is especially preferred that only small amounts, for example less than 10% organic materials, including waxes, are present. Another type of inorganic carrier suitable for use in the present invention includes cyclodextrin. As used herein, the term "cyclodextrin" (CD) includes any of the cyclodextrins known as unsubstituted cyclodextrins containing from six to twelve glucose units, especially alpha-, beta-, gamma-cyclodextrins, and mixtures thereof. themselves, and / or their derivatives, and / or mixtures thereof, which are capable of forming inclusion complexes with perfume ingredients. The alpha-, beta-, and gamma-cyclodextrins can be obtained from, among others, American Maize-products Company (Amaizo), Corn Processing Division, Hammond, Indiana; and Roquette Corporation, Gurnee, Illinois. There are many cyclodextrin derivatives that are known. The representative derivatives are those that are described in the patents of E.U.A. Nos. 3,426,011, Parmerter et al, February 4, 1969; 3,453,257, 3,453,258, 3,453,259, and 3,453,260, all in the name of Parmerter et al, and all of July 1, 1969; 3,459,731, Gramera et al, August 5, 1969; 3,553,191, Parmerter et al, January 5, 1971; 3,565,887 Parmerter et al, February 23, 1971; 4,535,152, Szejtli et al, August 13, 1985; 4,616,008, Hirai et al, dated October 7, 1986; 4,638,058, Brandt et al, January 20, 1987; 4,746,734, Tsuchiyama et al, May 24, 1988; and 4,678,598, Ogino et al, July 7, 1987, all of said patents being incorporated herein by reference. Examples of suitable cyclodextrin derivatives for use herein are methyl-β-CD, hydroxyethyl-β-CD, and hydroxypropyl-β-CD, of varying degrees of substitution (DS) available from Amaizo and Aldrich Chemical Company, Milwaukee , Wisconsin. Water-soluble derivatives are also highly desirable. Individual cyclodextrins can also be chained together, for example using multifunctional agents to form oligomers, cooligomers, polymers, copolymers, etc. Examples of such materials are commercially available from Amaizo and from Aldrich Chemical Company (β-CD / epichlorohydrin copolymers). It is also desirable to use mixtures of cyclodextrins and / or precursor compounds to provide a mixture of complexes. Such mixtures, for example, can provide more uniform odor profiles by encapsulating a larger scale of perfume ingredients and / or preventing the formation of large crystals of said complexes. Mixtures of cyclodextrins can be conveniently obtained using intermediates from known procedures for the preparation of cyclodextrins including those methods described in the U.S. Patents. Nos. 3,425,910, to Armbruster et al, February 4, 1969; 3,812,011 to Okada et al, May 21, 1974; 4,317,881 to Yagi et al, March 2, 1982; 4,418,144, to Okada et al, November 29, 1983; and 4,738,923 to Ammeraal, April 19, 1988, all of the aforesaid patents incorporated herein by reference in their entirety. Preferably at least a major portion of the cyclodextrins are alpha-cyclodextrin, beta-cyclodextrin, and / or gamma-cyclodextrin, more preferably beta-cyclodextrin. Some mixtures of cyclodextrin are commercially available from, for example, Ensuiko Sugar Refining Company, Yokohama, Japan. The fragrance carriers comprising the fragrance release complexes of the present invention can be incorporated into personal cleansing products as they are or can be or can be encapsulated in, for example, wax materials, such as fatty acids.
Complex formation The complexes of this invention are formed in any of the ways known in the art. Typically, the complexes are formed by either bringing the perfume and the cyclodextrin together as solutions in suitable solvents, preferably water, or in suspension or by kneading the ingredients together in the presence of a suitable, preferably minimum, amount of solvent, preferably water. Other polar solvents such as ethylene glycol, propylene glycol, diethylene glycol, tretylene glycol, 2-methoxyethanol, 2-ethoxyethanol, glycerin, dimethyl sulfoxide, dimethylformamide, 1,2-propanediol, ethanol, methanol, isopropanol, etc. And mixtures of said polar solvents with themselves and / or with water can be used as solvents for complex formation. The use of such solvents in complex formation has been described in an article in Chemistry Letters by A. Harada and S.Takahashi, pp. 2089-2090 (1984), said article being incorporated herein by reference. The method of suspension / kneading is particularly desirable because less solvent is needed and therefore less separation of solvent is required. Suitable procedures are described in the patents incorporated hereinbefore hereby reference. Additional descriptions of complex formation can be found in Atwood, J.L., J.E.D. Davies & D.D.MacNichol, (Ed.): Inclusion Compounds Vol. Ill, Academic Press (1984), especially Chapter 11; Atwood J.L., and J.E.D. Davies (Ed.): Proceedings of the Second International Symposium of Cyclodextrins Tokyo, Japan, (July, 1984); Cvclodextrin Technology. J. Szejtli, Kluwer Academic Publishers (1988); all mentioned publications being incorporated herein by reference. In general, fragrance-releasing complexes have a molar fragrance-to-carrier ratio (eg, cyclodextrin) of about 1: 1. However, the molar ratio can be higher or lower, depending on the molecular size of the active component and the identity of the cyclodextrin compound. The molar ratio can easily be determined by forming a saturated solution of the carrier and adding the fragrance to form the complex. In general, the complex will easily precipitate. If not, the complex can be precipitated normally by the addition of electrolyte, pH change, cooling, etc. The complex can then be analyzed to determine the ratio of fragrance to carrier. The current complexes are determined by the size of the cavity in the carrier and the size of the fragrance molecule. Although the normal carrier is a fragrance molecule in a carrier molecule, the complexes can be formed between a fragrance molecule and two carrier molecules when the fragrance molecule is large and contains two portions that can be adjusted in the carrier. Highly desirable complexes can be formed using mixtures of carrier sizes 61 because some fragrances are usually mixtures of materials that vary widely in size. It is usually desirable that at least a majority of the material be alpha-, beta-, and / or gamma-cyclodextrin, more preferably beta-cyclodextrin. The processes for the production of carriers and complexes are described in the U.S. Patents. Nos. 3,812.01 1, Okada, Tsuyama and Tsuyama, May 21, 1974; 4,317,881, Yagi, Kouno and Inui, March 2, 1982; 4,418,144, Okada, Matsuzawa, Uezima, Nakakuki, and Hirikoshi, November 29, 1983; 4,378,923, Ammeraal, April 19, 1988, all of said patents being incorporated herein by reference. The materials obtained by any of those variations are acceptable for the purposes of this invention. It is also acceptable to initially isolate the inclusion complexes directly from the reaction mixture by crystallization. The continuous operation normally involves the use of supersaturated solutions, and / or suspension / kneading, and / or temperature manipulation, for example heating and then either cooling, freeze drying, etc. The complexes may or may not be dried depending on the next step in the process for making the desired composition. The incorporation of the complex / solvent mixture (water) in some carriers, for example polyalkylene glycol, eliminates the need for a drying step. In this way, it is desirable to use the wet complex suspension, without drying with a liquid carrier to improve handling and ease of incorporation into subsequent compositions. In general, the least possible procedural steps are used to avoid the loss of assets and expensive processing costs.
Encapsulation of the fragrance release complex It is preferred to encapsulate the fragrance release complex with a coating material. Preferred coating materials include water-soluble and water-insoluble materials. Water-soluble materials are more preferred because they allow a rapid release of fragrance in the presence of an aqueous solution, e.g., water. Encapsulation materials and suitable techniques are described in U.S. Patent No. 5,236,615 to Trinh et al, August 17, 1993; patent of E.U.A. No. 5,139,687, to Borgher Sr. Et al, of August 18, 1992; patent of E.U.A. No. 5,552,378, to Trinh et al, September 3, 1996; patent of E.U.A. No. 5,246.61 1 to Trinh et al, September 21, 1993; patent of E.U.A. No. 5,112,612 to Garvey et al, May 12, 1992; patent of E.U.A. No. 5,292,533 to McMahon et al, March 8, 1994; patent of E.U.A. No. 5,466,460 to McMahon et al, November 14, 1995; patent of E.U.A. No. 5,376,287 to Borcher Sr. Et al, of December 27, 1994; All mentioned patents are incorporated herein by reference in their entirety. Non-limiting examples of water-insoluble materials are typically selected from waxy materials such as paraffin waxes, microcrystalline waxes, animal waxes, vegetable waxes, saturated fatty acids and fatty alcohols having from 12 to 40 carbon atoms in their alkyl chain, and fatty esters such as fatty acid triglycerides, sorbitan fatty acid esters and fatty acid esters of fatty alcohols, or from water-insoluble polymers. Suitable typical specific waxy coating materials include lauric, myristic, palmitic, stearic, arachidic and behenic acids, stearyl and behenyl alcohol, microcrystalline wax, beeswax, spermaceti wax, candelilla wax, sorbitan sorbate, sorbitan tetralaurate, tripalmitin. , trimiristine and octacosan. A preferred waxy material is coconut fatty acid. Non-limiting examples of suitable water-soluble materials include, but are not limited to, polyalkylene glycol materials, water-soluble polymers, glycerol esters, and polyols. Especially preferred are polyethylene glycols which are liquid or molten at less than 100 ° C, especially polyalkylene glycol materials such as: (A) Polyalkylene glycols and / or mixed polyalkylene glycols having average molecular weight (MW) of from 400 to about 20,000, preferably between 600 and approximately 10,000. Examples include: Polyethylene glycols, preferably having a molecular weight of from 1,000 to about 400,000, more preferably having a molecular weight of from 4,400 to about 400,000. Suitable examples of polyethylene glycols ("PEG") include but are not limited to, PEG 600, PEG 1450, PEG 3350, PEG 4600, and PEG 8000, as designated by the CTFA Cosmetic Ingredient Handbook. Second Edition, (1992); Polypropylene glycols preferably having a molecular weight of from 600 to about 4,000; poly (tetramethylene) glycol) preferably having a molecular weight of from 1,000 to about 10,000; Polyalkylene glycols mixed as poly (ethylene oxide-propylene oxide). Examples: average MW 1, 100, E / P ratio 0.15: 1; Average MW 3.440, E / P ratio 0.33: 1; Average MW 2.920, E / P ratio 0.8: 1; Average MW 13.333, E / P ratio 3: 1; and average MW 8,750, ratio E / P 5: 1; Polyalkylene glycol block copolymers mixed as HO- [CH2CH2O] x- [CH2CH (CH3) O] and- [CH2CH2O] xH and / or HO- [CH (CH3) CH2O] and- [CH2CH2O] x- [CH2CH (CH3 ) O] yH in which the sum of y's is on the scale of 50 to 70, and the ratio of the sum of x's to the sum of y's is from 1: 10 to about 1 1: 10, preferably from 1: 2 at about 1: 1. Examples include materials manufactured by BASF Corporation and sold under the trade names of surfactant Pluronic R and Pluronic RR, respectively. (B) Alkylated polyalkylene glycols of C -? - C22, preferably of C1-C4 [mono- and dialkyl ethers of poly (alkylene glycol)], RO- (R2 =) nH and / or RO- (R2O) nR, with each R being methyl, ethyl, propyl, or butyl; each R2 being an alkylene group of C2-C4, and n on a scale of 1 to 200, with the percentage of polyalkylene glycol preferably being more than 50%. Specific examples include: RO- [CH2CH (CH3) O] m-H with R being methyl, ethyl, propyl, or butyl; and m being from 1 to about 200 (MW from 90 to about 20,000); RO- (CH2CH2O) n-H with each R being methyl, ethyl, propyl, or butyl, preferably methyl; and n being from 2 to about 200 (MW from 120 to about 9,000), preferably from 15 to about 150 (MW from 700 to about 6,700), more preferably from 15 to 100 (MW of from 700 to about 4,500); and / or RO- (CH2CH2O) n -R with each R being methyl, ethyl, propyl, or butyl; and n being from 2 to about 200 (MW from 134 to about 9,000), preferably from 15 to about 150 (MW from 700 to about 6,700), more preferably from 15 to 100 (MW from 700 to about 4,500). (C) Polyalkoxylated materials having an average molecular weight of from 200 to 20,000 and the weight percentage of the polyalkoxy portion being from 50% to about 99%. Specific examples include: Tetronic ® and Tetronic R ®; and Varsat 66®. Tetronic ® and Tetronic R ® are copolymer block surfactants, manufactured by BASF Corporation. The Tetronic ® surfactants have the general formula: And the Tetronic R ® surfactants have the general formula: In which the sum of y's is on the scale from 8 to about 120, and the ratio of the sum of x's to the sum of y's is from about 1: 10 to about 1 1: 10, preferably from 1: 2 to about eleven. Varsat 66R, sold by Sherex Chemical Company, has the formula: [H- (OCH2CH2) p-NT (C2H5) (R3) - (CH2CH2O) q-H] C2H5SO4? with R3 being an alkyl or alkenyl radical of C? 2-C? s, and with p + q being preferably from 10 to about 30. Surfynol 465®, sold by Air Products and Chemicals, Inc. is an adduct of ethylene oxide of 2,4,7,9-tetramethyl-5-decin-4,7-dioI of the formula CH, CH, CH, CH, CH 3 -CH- CH 2 -C C = C- C- CH 2 -CH- CH 3 HO (CH2CH20) r _J - (OCH2CH2) s- OH With r + s being about 8. In Surfynol 465® the weight percentage of the polyethylene oxide portion is about 65%. The encapsulation materials may contain other portions as long as they do not disturb the complex excessively. The weight ratio of the complex to the encapsulating material is from 1: 1 to approximately 1: 5, preferably from 2: 3 to approximately 1: 3. The level of the encapsulation material should be relatively high so that the complex can be supported and the mixture of complex and encapsulation material can be relatively fluid when the carrier is in the liquid state. Preferred encapsulation materials are those that are solid at room temperature but can be rendered fluid or molten below about 100 ° C, more preferably those that can become fluid or molten below about 80 ° C.
Specific examples are: Polyethylene glycols with an average molecular weight (MW) of 600 to about 20,000; Poly (tetramethylene glycols) with an average molecular weight (MW) of from 1,000 to about 10,000; and poly (ethylene glycol) methyl ether with an average MW of 600 to about 20,000. The complexes herein are desirably formed by a process of the type described hereinabove, in which the cyclodextrin is mixed with the fragrance, preferably perfume, in a limited amount of water, then the water is evaporated by air or lyophilization, as described here below. The complex is then mixed with the encapsulating material, or preferably with the normally solid molten encapsulation material, at a ratio of complex to encapsulating material of from 1: 1 to about 1: 5, to form pumpable fluid complex compositions for additional processing. A preferred composition and processing comprises applying the melted mixtures of (a) dry fragrance / carrier complex and (b) the normally solid hydrophilic polyethylene glycol material on a solid substrate surface, then allowing the droplets to solidify on said surface. Said drops are rapidly soluble by water or other aqueous medium such as body fluids (eg, sweat, saliva, urine, menses, etc.) to release the active. Said hydrophilic polyethylene glycol materials have the general formula RO- (CH2CH2O) nR in which each R is a hydrogen radical, a C1-C22 alkyl or alkenyl radical, or mixtures of said radicals, and n is from 13 to about 450 (Average MW from 600 to about 20,000) with the percentage of polyethylene glycol preferably being more than 50%. Preferred R groups include a hydrogen radical, C 1 -C 4 alkyl radicals, or mixtures of said radicals. The most preferred polyethylene glycol materials are hydrophilic polyethylene glycol materials, poly (ethylene glycol) methyl ethers, or mixtures thereof, with average MW's of from 600 to about 20,000 (n is from 13 to about 450), preferably from 1 , 000 to about 9,000 (n is from 20 to about 200), more preferably from 1,400 to about 4,500 (n is from 30 to about 100). The weight ratio of the complex to the polyethylene glycol material is from 1: 1 to about 1: 5, preferably from 1: 2 to about 1: 4. Other preferred compositions and methods involve the formation of molten mixture pills of (a) dry fragrance / carrier complex and normally solid hydrophilic polyethylene glycol material as described above by, for example, spray drying, maruization, in solid pills with sizes of particle from 10 microns to about 1,000 microns, preferably from 50 microns to about 600 microns. Said solid pills may then be used, for example, either (a) adhered to a solid substrate surface by distributing the pills on said surface, melting said pills, and then re-solidifying to bind the pills to said surface or (b) placed in a bag or bag, not water-soluble, but porous.
These items will easily release the asset when treated with water or other aqueous media. Other preferred compositions and methods comprise forming the complex in the presence of a limited amount of solvent, for example, water, then without removing the solvent (water), the polyethylene glycol hydrophilic materials normally solids are mixed in molten form with the complex mixture. water to form a pumpable mixture that can be used directly to form solid compositions by mixing with molten materials that would not normally be compatible with the complex / water mixture alone. In the above composition and process which uses a mixture of encapsulating material and solvent to suspend the complex, the ratio of encapsulation material to complex typically ranges from 0.5 to about 3, preferably from 0.6 to about 2, and more preferably from 0.75 to about 1. The ratio of solvent plus encapsulation material to complex typically ranges from 1: 1 to about 5: 1, preferably from 1: 1 to about 3: 1. Preferably there is more encapsulation material than solvent, the solvent is water, and / or the encapsulating material is polyethylene glycol or alkylated polyethylene glycol, preferably having a molecular weight of from 600 to 20,000, and more preferably from 1,000 to about 9,000 .
The process using a mixture of encapsulating material and solvent is also desirable because the removal of the solvent adds a step, or additional steps, and can result in the loss of some asset, for example, perfume. The polyalkylene glycol materials preferably do not have any hydrophobic end group that will displace the cyclodextrin active. The polyalkylene glycols may contain other monomers in the chains, but the level of other monomers should be kept low to avoid the displacement of the active cyclodextrin complex. Surprisingly, the complexes are effectively dispersed in the aforementioned carrier (water) but are not destroyed, for example, by the carrier that displaces the active in the form of a complex, for example, perfume. Solvents such as ethylene glycol, propylene glycol, ethanol, glycerin, and molten sorbitol can form pumpable suspensions, but will at least partially dissolve the active ingredients and therefore release the active ingredient. Once the complexes are dispersed in the encapsulation material, the complexes can be applied directly to substrates using the complex suspension in the carrier to achieve good distribution. For example, the fragrance / carrier in the encapsulation material may be sprinkled and / or spread over the desired surface. The impellers, or air under pressure, can be used to form a dispersion of the encapsulation material and the complex. The complexes can release some of the active (perfume) when they are exposed to water in the atmosphere, but, surprisingly, a large amount of the active, still active, volatile perfume remains in the complexes adhered to the surface. When the encapsulation material is used to roll up and / or protect the complex and / or adhere the complex to the substrate, the carrier is preferably solid at temperatures that are normally encountered. Propylene glycols are not solids so they will be used only as part of a mixture of encapsulation materials. Whether a specific carrier or mixture of carriers is solid can be easily determined by inspection. Examples of polymeric materials that can be used for coating the particles herein are cellulose ethers such as ethyl, propyl, or butylcellulose; cellulose esters such as cellulose acetate, propionate, butyrate or acetate-butyrate; polyalkylene glycol such as ethylene, propylene, tetramethylene glycol; urea-formaldehyde resins, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, polyacrylates, polymethacrylates, polymethyl methacrylates and nylon. Such materials and their equivalents are described in greater detail in any conventional manual of synthetic organic plastics, for example, in Modern Plastics Encyclopedia Volume, Vol. 62, No. 10 A (for 1985-1986) on pages 768-787, published by McGraw-Hill, New York, NY (October 1985), incorporated herein by reference. A preferred polymeric material is ethyl cellulose. The polymeric coating materials can be plasticized with known plasticizing agents, such as phthalate, adipate and sebacate esters, polyols (for example ethylene glycol), tricresylphosphate, castor oil and camphor. These polymer coatings are preferred by the superior protection they provide. The coating, when present, is generally present in an amount of from 2% to about 50%, preferably from 20% to about 40%, by weight of the fragrance release complex. The coating material may comprise a mixture of water-soluble coating materials, non-water-soluble coating materials, and polymeric coating materials. In such mixtures the waxy coating material will typically comprise from 10% to about 90% of the mixture and the polymeric material from about 10% to 90%. The function of the coating surrounding the fragrance-releasing complex is to provide improved additional stability, as well as to allow double delivery of fragrances in which different fragrances can be impregnated in various complexes.
Impregnation of the fragrance within the carrier At least a portion of the fragrance used in the personal cleansing products of the present invention is impregnated within the fragrance carrier as described hereinbefore. To impregnate the fragrance within the fragrance carrier, the fragrance and carrier are mixed together under conditions of high shear to provide a homogeneous mixture.
Pure fragrances In addition to the fragrances impregnated within the fragrance carrier, the personal cleansing products of the present invention may also optionally contain fragrances present in their pure form (eg, not impregnated within a fragrance carrier). The incorporation of a pure fragrance into the personal cleansing products herein can contribute to unique fragrance impressions for the product. For example, a personal cleansing product that contains both a fragrance impregnated within a fragrance carrier and a pure fragrance can 1) give a double fragrance impression (for example it can exhibit different fragrance impressions for the dry (pure) against the product in use) or 2) can optimize the fragrance impression for the pure product and the product in use. The fragrances that can be used as pure fragrances for the personal cleansing products of the present invention are the same as those described herein above for incorporation into the fragrance release complex. The pure fragrance is typically present in an amount in the range of from 0.01% to about 10%, preferably from 0.01% to about 2%, more preferably from 0.1% to about 2% by weight of the substrate. The total fragrance (for example the pure fragrance and the fragrance incorporated in the fragrance release complex) typically present in the products of the present invention is in the range of 0.01 to about 10%, preferably 0.1 to about 5%, more preferably from 0.4 to about 2%.
IV.- Conditioner component The articles of the present invention may preferably comprise a conditioning component that is useful for providing a conditioning benefit to the skin or hair during use of the article. The conditioning component comprises from about 0.05% to 99%, preferably from about 0.1% to 50% and more preferably from about 1% to about 25% by weight of said water-insoluble substrate. The conditioning component of the present invention may comprise: a water soluble conditioning agent; an oil-soluble conditioning agent, conditioning emulsion; lipid hardening material; or any combination or permutation of the four. The oil-soluble conditioning agent is selected from one or more oil-soluble conditioning agents, so that the heavy arithmetic average solubility parameter of the oil-soluble conditioning agent is less than or equal to 10.5. The water-soluble conditioning agent is selected from one or more water-soluble conditioning agents, so that the heavy arithmetic average solubility parameter of the water-soluble conditioning agent is less than or equal to 10.5. It is recognized, based on this mathematical definition of solubility parameters, that it is possible, for example, to achieve the required arithmetic mean solubility parameter, for example, less than or equal to 10.5, for an oil-soluble conditioning agent that includes two or more compounds, if one of the compounds has an individual solubility parameter greater than 10.5. Contrarily, it is possible to achieve the appropriate heavy arithmetic mean solubility parameter, ie, greater than 10.5, for a water-soluble conditioning agent, which consists of two or more compounds, if one of the compounds has an individual solubility parameter of less than or equal to 10.5 Solubility parameters are well known in formulation chemistry for those skilled in the art and are routinely used as a guide to determine the compatibility and solubilities of materials in formulation processes. The solubility parameter of a chemical compound, d, is defined as the square root of the cohesive energy density for that compound. Typically, a solubility parameter for a compound is calculated from tabulated values of the contributions of the additive group for the heat of vaporization and the molar volume of the components of that compound, using the following equation: in which S¡ S¡ = the sum of the heat of vaporization of the contributions of the additive group, and Sjm = the sum of the contributions of the additive group of molar volume. Standard vaporization heat tabs and additive molar volume group contributions for a wide variety of atoms and groups of atoms are pooled in Barton, A.F.M. Handbook of Solubility Parameters, CRC Press, Chapter 6, Table 3. Pp. 64-66 (1985), which is uncolored here by reference in its entirety. The above solubility parameter equation is described in Fedors, R.F., "A Method for Estimating Both the Solubility Parameters and Molar Volumes of Liquids," Polvmer Engineering and Science, vol. 14, no. 2, pp. 147-154 (February 1974), which is hereby incorporated by reference in its entirety. The solubility parameters obey the laws of mixtures, so the solubility parameter for a mixture of materials is given by the heavy arithmetic medium (for example, the heavy average) of the solubility parameters for each component of that mixture. See, Handbook of Chemistry and Physiscs. 57th edition, CRC Press, p. C-726 (1976-1977), which is hereby incorporated by reference in its entirety. The formulation chemicals typically report and use solubility parameters in units of (cal / cm3) 1 2. The tabulated values of additive groups for vaporization heat in Handbook of Solubilitv Parameters are reported in units of kJ / mol. However, those tabulated values of heat of vaporization are easily converted to cal / mol using the following well known ratios: 1 J / mol = 0.239006 cal / mol and 1000 J = 1 Kj. See Gordon, A.J. et al., The Chemist's Companion. John Wiley & Sons, pp. 456-463. (1972), which is hereby incorporated by reference in its entirety. The solubility parameters have also been tabulated for a wide variety of chemical materials. Solubility parameter tabulations are found in the aforementioned Handbook of Solubilitv Parameters. Also see "Solubility Effets In Product, Package, Penetration, And Preservation," C.D. Vaughan, Cosmetics and Toiletries. vol. 103, October 1988, pp. 47-69, which is incorporated herein by reference in its entirety.
A. Oil-soluble conditioning agents Non-limiting examples of conditioning agents useful as oil-soluble conditioning agents include those selected from the group consisting of mineral oil, petrolatum, branched chain hydrocarbons of C7-C40, alcohol esters of C1-C30 of C 1 -C 30 carboxylic acids, C 1 -C 30 alcohol esters of C 1 -C 30 dicarboxylic acids, monoglycerides of C 1 -C 30 carboxylic acids, diglycerides of C 1 -C 30 carboxylic acids, triglycerides of C 1 -C 30 carboxylic acids, monoesters of ethylene glycol of C 1 -C 30 carboxylic acids, ethylene glycol diesters of C 1 -C 30 carboxylic acids, propylene glycol monoesters of C 1 -C 30 carboxylic acids, propylene glycol diesters of C 1 -C 30 carboxylic acids, monoesters and polyesters of acid sugars C1-C30 carboxylic acid, polydialkylsiloxanes, polydiarylsiloxanes, polyalkarylsiloxanes, cyclomethicones having to 9 silicon atoms, vegetable oils, vegetable oils, hydrogenated vegetable oils, polypropylene glycol of C 4 -C 20 alkyl ethers, C 8 -C 30 alkyl diethers and mixtures thereof. Mineral oil, which is also known as petrolatum liquid, is a mixture of liquid hydrocarbons obtained from petroleum. See The Merck Index, tenth edition, Entry 7048, p. 1033 (1983) and International Cosmetic Ingredient Dictionary, 5th Edition vol. 1 p. 415-417 (1993), which are hereby incorporated by reference in their entirety. Petrolatum, which is also known as petroleum jelly, is a colloidal system of non-direct chain solid hydrocarbons and high boiling liquid hydrocarbons, in which most liquid hydrocarbons are kept within micelles. See The Merck Index, tenth edition, Entry 7047, p. 1033 (1983); Schindler, Druq Cosmet. lnd., 89, 36-37, 76, 78-80, 82 (1961); and International Cosmetic Ingredient Dictionary, 5th Edition, vol. 1 p. 537 (1993), which are hereby incorporated by reference in their entirety. Straight and branched chain hydrocarbons having from about 7 to about 40 carbon atoms are useful herein. Non-limiting examples of these hydrocarbon materials include dodecane, isododecane, squalene, cholesterol, hydrogenated polyisobutylene, docosane (e.g., C22 hydrocarbon), hexadecane, isohexadecane (a commercially available hydrocarbon sold as Permethyl® 101 A from Presperse, South Plainfield, NJ ). Also useful are isoparaffins of C7-C40, which are branched C7-C40 hydrocarbons. Also useful are C 1 -C 30 alcohol esters of C 1 -C 30 carboxylic acids and C 2 -C 30 dicarboxylic acids, including direct or branched chain materials, as well as aromatic derivatives. Also useful are esters such as monoglycerides of C 1 -C 30 carboxylic acids, diglycerides of C 1 -C 30 carboxylic acids, triglycerides of C 1 -C 30 carboxylic acids, monoesters of ethylene glycol of C 1 -C 30 carboxylic acids, ethylene glycol diesters of carboxylic acids of C1-C30, monoesters of propylene glycol of carboxylic acids of C1-C30 and diesters of propylene glycol of carboxylic acids of C1-C30. The direct or branched chain aryl carboxylic acids are also included here. The propoxylated and ethoxylated derivatives of these materials are also useful.
Nonlimiting examples include diisopropilsebacato, diisopropyl adipate, isopropyl myristate, isopropyl palmitate, miristilpropionato, etilenglicoldistearato, 2-etilhexilpalmitato, isodecilneopentanoato, di-2-etilhexilmaleato, cetylpalmitato, miristilmiristato, estearilestearato, ceti I stearate, behenilbehenrato, dioctyl maleate, dioctyl sebacate, diisopropyl adipate, cetiloctanoato, diisopropildilinoleato, caprylic / capric triglyceride, triglyceride PEG-6 caprylic / capric, triglyceride PEG-8 caprylic / capric; and mixtures thereof. Also useful are various C1 -C30 monoesters and polyethers of glycerin and related materials. These esters are derived from glycerin and one or more portions of carboxylic acid. Depending on the constituent acid and sugar, the esters may be in liquid or solid form at room temperature. Non-limiting examples of solid esters include glyceryl tribehenate, glyceryl stearate, glyceryl palmitate, glyceryl distearate, glyceryl dipalmitate. Also useful are various C 1 -C 30 monoesters and polyesters of sugars and related materials. These esters are derived from a sugar or polyol portion and one or more carboxylic acid moieties. Depending on the constituent acid and sugar, the esters may be in liquid or solid form at room temperature. Examples of liquid esters include: glucose tetraoleate, glucose tetraesters, glucose tetraesters of soybean oil fatty acids (unsaturated), mixed soybean oil fatty acid tetraesters, galactose tetraesters of oleic acid, tetraesters of arabinose of linoleic acid, tetralinoleate of xylose, pentaoleate of galactose, tetraoleate of sorbitol, hexaesters of sorbitol of unsaturated soybean oil fatty acids, xylitol pentaoleate, sucrose tetraoleate, sucrose pentaolate, sucrose hexaoleate, sucrose heptaleate, sucrose octaoleate and mixtures thereof. Examples of solid esters include: sorbitol hexaester in which the carboxylic acid ester moieties are palimotoleate and araquidate in a molar ratio of 1: 2; the octaester of raffinose in which the carboxylic acid ester portions are linoleate and behenate in a molar ratio of 1: 3; the maltose heptaester wherein the esterifying carboxylic acid moieties are lignocerate sunflower seed oil fatty acids in a molar ratio of 3: 4; the octaester of sucrose wherein the esterifying carboxylic acid moieties are oleate and behenate in a molar ratio of 2: 6; and the octaester of sucrose wherein the esterifying carboxylic acid moieties are laurate, linoleate and behenate in a molar ratio of 1: 3: 4. A preferred solid material is sucrose polyester in which the degree of esterification is 7-8, and in which the fatty acid portions with mono- and / or di-unsaturated and behenic C18, in a molar ratio of not saturated: behenic from 1: 7 to 3: 5. A preferred solid sugar polyester is the sucrose octaester in which there are 7 behenic fatty acid portions and about 1 oleic acid portion in the molecule. Other materials include cottonseed oil or fatty acid esters of sucrose soybean oil. Ester materials are further described in U.S. Patent No. 2,831, 854, U.S. Patent 4,005,196, Jandacek, issued January 25, 1977; U.S. Patent No. 4,005, 195, to Jandacek, issued January 25, 1977, U.S. Patent No. 5,306,516 to Letton et al., Issued April 26, 1994; U.S. Patent No. 5,306,515 to Letton et al., Issued April 26, 1994; U.S. Patent No. 5,305,514 to Letton et al., Issued April 26, 1994; U.S. Patent No. 4,797,300 to Jandacek et al., Issued January 10, 1989; U.S. Patent No. 3,963,699 to Rizzi et al., Issued June 15, 1976; U.S. Patent No. 4,518,772 to Volpenhein, issued May 21, 1985; and U.S. Patent No. 4,517,360 to Volpenhein, issued May 21, 1985; which are incorporated herein by reference in their entirety. Non-volatile silicones such as polydialkylsiloxanes, polydiarylsiloxanes, and polyalkarylsiloxanes are also useful oils. These silicones are described in U.S. Patent No. 5,069,897 to Orr, issued December 3, 1991, which is incorporated herein by reference in its entirety. The polyalkylsiloxanes correspond to the general chemical formula R3SiO [R2SiO] xSiR3 in which R is an alkyl group (preferably R is methyl or ethyl, more preferably methyl) and x is an integer of up to about 500, chosen to achieve the desired molecular weight. Commercially available polyalkylsiloxanes include the polydimethylsiloxanes, which are also known as dimethicones, non-limiting examples thereof include the Vicasil® series sold by the General Electric Company and the Dow Corning® 200 series sold by Dow Corning Corporation. Specific examples of polydimethylsiloxanes that are used herein include Dow Corning® 225 fluid having a viscosity of 10 centistokes and a boiling point greater than 200 ° C, and Dow Corning® 200 fluids having viscosities of 50, 350 and 12,500 centistokes, respectively and boiling points greater than 200 ° C. Also useful are materials such as trimethylsiloxysilicate, which is a polymeric material corresponding to the general chemical formula [(CH2) 3SiO? / 2] x [SiO2] y, in which x is an integer from about 1 to about 500 ey is an integer from about 1 to about 500. A commercially available trimethylsiloxysilicate is sold as a mixture with dimethicone as Dow Coming®593 fluid. Also useful here are dimethiconols, which are hydroxy terminated in dimethylsilicon. These materials can be represented by the general chemical formulas R3SiO [R2SiO] xSiR2OH and HOR2SiO [R2SiO] xSiR2OH, wherein R is an alkyl group (preferably R is methyl or ethyl, more preferably methyl) and x is an integer of about 500, chosen for achieve the desired molecular weight. Commercially available dimethiconols are typically sold as mixtures such as dimeticon or cyclomethicon (eg Dow Corning® 1401, 1402, and 1403 fluids). Also useful herein are polyalkylarylsiloxanes, with polymethylphenylsiloxanes having viscosities of about 15 centrioxes at 25 ° C are preferred. These materials are available, for example, as SF 1075 methylphenyl fluid (sold by General Electric Company) and feniltrimeticon 556 Cosmetic Grade fluid (sold by Dow Corning Company). Vegetable oils and hydrogenated vegetable oils are also useful here. Examples of vegetable oils and hydrogenated vegetable oils include safflower oil, castor oil, coconut oil, cottonseed oil, shad oil, palm kernel oil, palm oil, peanut oil, soybean oil, oil colaza, linseed oil, rice bran oil, pine oil, sesame oil, sunflower seed oil, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated coconut oil, hydrogenated cottonseed oil, oil of hydrogenated bran, hydrogenated palm kernel oil, hydrogenated palm oil, hydrogenated peanut oil, hydrogenated soybean oil, hydrogenated soybean oil, hydrogenated colaza oil, hydrogenated flaxseed oil, hydrogenated rice bran oil, Hydrogenated sesame, hydrogenated sunflower seed oil and mixtures thereof. Also useful herein are the C4-C2O alkyl ethers of polypropylene glycols, C1-C2O carboxylic acid esters of polypropylene glycols and C8-C3O dialkylethers. Non-limiting examples of such materials include butyl ether PPG-14, stearyl ether of PPG-15, dioctyl ether, dodecyl octyl ether and mixtures thereof.
B. Water-soluble conditioning agents Non-limiting examples of conditioning agents useful as water-soluble conditioning agents include those selected from the group consisting of polyhydric alcohols, polypropylene glycols, polyethylene glycols, ureas, pyrrolidone carboxylic acids, ethoxylated C3-C6-diols and triols and / or propoxylates, C2-C6 alpha-hydroxy carboxylic acids, ethoxylated and / or propoxylated sugars, polyacrylic acid copolymers, sugars having up to 12 carbon atoms, sugar alcohols having up to 12 carbon atoms, and mixtures of the same. Specific examples of useful water soluble conditioning agents include materials such as urea; guanidine; glycolic acid and glycolate salts (for example ammonium and quaternary alkylammonium); lactic acid and lactate salts (ammonium and quaternary alkylammonium); sucrose, fructose, glucose, erutrosa, erythritol, sorbitol, mannitol, glycerol, hexanetriol, propylene glycol, butylene glycol, hexylene glycol, and the like; polyethylene glycols such as PEG-2, PEG-3, PEG-30, PEG-50, polypropylene glycols such as PPG-9, PPG-12, PPG-15, PPG-17, PPG-20, PPG-26, PPG-30, PPG-34; alkoxylated glucose, hyaluronic acid; and mixtures thereof. Also useful are materials such as aloe vera in any of its variety of forms (for example aloe vera gel), citin, sodium polyacrylates grafted with starch such as Sanwet (RTM) IM-1000, IM-1500, and IM-2500 (available from Celanese Superabsorbent Materials, Portsmouth, VA); lactamide monoethanolamine; monoethanolamine acetamide; and mixtures thereof. Propoxylated glycerols are also useful as described in propoxylated glycerols described in the US patent. 4,976,953, to Orr et al., December 1 1, 1990, which is incorporated herein by reference in its entirety.
C - Conditioning emulsions The conditioning component of the present invention may also comprise a conditioning emulsion to provide a conditioning benefit to the skin or hair during use of the article. The term "conditioning emulsion" as used herein means the combination of an internal phase comprising a water-soluble conditioning agent that is surrounded by an external phase comprising an oil-soluble agent. In preferred embodiments, the conditioning emulsion comprises from 0.25% to about 150%, preferably from 0.5% to about 100%, and more preferably from 1% to about 50% by weight of said non-water-soluble substrate. By conditioning emulsion means a combination of an internal phase comprising a water-soluble conditioning agent which is surrounded by an external phase comprising an oil-soluble agent. In preferred embodiments, the conditioning emulsion would additionally comprise an emulsifier. The conditioning emulsion comprises (i) an internal phase comprising water-soluble conditioning agents as described above, and (i) an external phase comprising oil-soluble agents (e.g., conditioning agents and non-conditioning agents) as described above and herein right away. In further embodiments, the conditioning emulsion additionally comprises an emulsifier capable of forming an emulsion of said internal and external phases. Although an emulsifier capable of forming an emulsion of the internal and external phases is preferred in the present invention, it is recognized in the art of skin care formulations that a water-soluble conditioning agent may be enveloped by an oil-soluble agent without an emulsifier. . As long as the water-soluble conditioning agent is surrounded by an oil-soluble agent, thus protected from being rinsed during the cleaning process, the composition would be within the scope of the present invention. The internal phase may optionally comprise other water-soluble or water-dispersible materials that do not adversely affect the stability of the conditioning emulsion. One of said materials is a water-soluble electrolyte. The dissolved electrolyte minimizes the tendency of the materials present in the lipid phase to also dissolve in the water phase. An electrolyte capable of imparting ionic resistance to the internal phase can be used. Suitable electrolytes include, the water-soluble mono-, di-, or trivalent inorganic salts such as water-soluble halides, for example chlorides, nitrates and sulfates of alkali metals and alkaline earth metals. Examples of such electrolytes include sodium chloride, calcium chloride, sodium sulfate, magnesium sulfate, and sodium bicarbonate. The electrolyte will typically be included in a concentration on the scale of 1 to 20% of the internal phase. Other water-soluble or dispersible materials that may be present in the internal phase include egrosers and viscosity modifiers. Suitable thickeners and viscosity modifiers include water-soluble polyacrylic resins and hydrophobically modified polyacrylic resins such as Carbopol and Pemulen, starches such as corn starch, potato starch, tapioca, gums such as guar gum, gum arabic, cellulose ethers such as hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and the like. These viscosifiers and viscosity modifiers will typically be included in a concentration on the scale of 0.05 to about 0.5% of the internal phase. Other water-soluble or dispersible materials that may be present in the internal water phase include polycationic polymers to provide steric stabilization at the water-lipid interface and non-ionic polymers that also stabilize the water-in-lipid emulsion. Suitable polycationic polymers include polyethylene glycols (PEG) such as Carbowax. These polycationic and non-ionic polymers will typically be included in a concentration on the scale from 0.1 to about 1.0% of the internal phase. Preferred embodiments of the present invention containing conditioning emulsions comprise an emulsifier capable of forming an emulsion of the internal and external phases. In the emulsions of the present invention, the emulsifier is included in an effective amount. What comprises an "effective amount" will depend on a number of factors including the respective amounts of oil-soluble agents, the type of emulsifier used, the level of impurities present in the emulsifier and the like. Typically, the emulsifier comprises from 0.1% to about 20%, preferably from 1% to about 10%, and more preferably from 3% to about 6% by weight of the conditioning emulsion. The emulsifiers useful in the present invention are typically oil soluble or miscible with the materials of the oil-soluble outer phase, especially at the temperature at which the lipid material melts. It must also have a relatively low HLB value. Emulsifiers suitable for use in the present invention have HBL values typically in the range of 1 to about 7 and may include mixtures of different emulsifiers. Preferably, those emulsifiers will have HBL values of from 1.5 to about 6, and more preferably from 2 to about 5. A wide variety of emulsifiers are useful herein and include, but are not limited to, those that are selected from the group consisting of of sorbitan esters, glyceryl esters, polyglyceryl esters, methylglucose esters, sucrose esters, ethoxylated fatty alcohols, ethoxylates of hydrogenated castor oil, sorbitan ester ethoxylates, polymeric emulsifiers, and silicone emulsifiers.
Sorbitan esters are useful in the present invention. The sorbitan esters of branched-chain, saturated and unsaturated C16-C22 fatty acids are preferable. Due to the manner in which they are typically manufactured, those sorbitan esters usually comprise mixtures of mono-, di-, tri-, etc., esters. Representative examples of suitable sorbitan esters include sorbitan monooleate (for example SPAN ® 80), sorbitan sesquioleate (for example Arlacel ® 83), sorbitan monoisostearate (for example CRILL ® manufactured by Croda), sorbitan stearates (for example SPAN) ® 60), sorbitan trioleate (for example SPAN ® 85), sorbitan sorbate (for example SPAN ® 65), sorbitan dipalmitatos (for example SPAN ® 40), and sorbitan isostearate. Sorbitan monoisostearate and sorbitan sesquioleate are particularly preferred emulsifiers for use in the present invention. Other emulsifiers suitable for use in the present invention include, but are not limited to, glyceryl monoesters, preferably glyceryl monoesters of branched chain fatty acids, saturated, unsaturated C16-C22 such as glyceryl oleate, glyceryl monostearate, monopalmitate of glyceryl, glyceryl monobehenate, and mixtures thereof; polyglyceryl esters of branched chain fatty acids, saturated, unsaturated C16-C22 such as polyglyceryl-4 isostearate, polyglyceryl-3 oleate, diglycerol monoleate, tetraglycerol monooleate, and mixtures thereof; methylglucose esters, preferably branched chain, saturated, unsaturated C 16 -C 22 fatty acid methyl glucose esters such as methyl glucose dioleate, methyl glucose sesquiisostearate, and mixtures thereof; fatty acid esters of sucrose, preferably sucrose esters of branched chain fatty acids, saturated, unsaturated of C 2 -C 22 such as sucrose stearate, sucrose trilaurate, sucrose distearate (for example Crodesta® F10), and mixtures thereof: ethoxylated C12-C22 fatty alcohols such as oleth-2, oleth-3, steareth-2, and mixtures thereof; ethoxylates of hydrogenated castor oil such as hydrogenated castor oil PEG-7, ethoxylates of sorbitan ester such as sorbitan peroleate PEG-40, Polysorbate-80, and mixtures thereof; polymeric emulsifiers such as copolymer of ethoxylated dodecylglycol; and silicone emulsifiers such as laurylmethicone copolyol, cetyldimethicone, dimethicone copolyol, and mixtures thereof. In addition to those primary emulsifiers, the compositions of the present invention may optionally contain a co-emulsifier to provide additional water-lipid emulsion stability. Suitable co-emulsifiers include, but are not limited to, phosphatidylcholines and compositions containing phosphatidylcholines such as lecithins; C16-C22 long chain fatty acid salts such as sodium stearate; dialiphatic quaternary ammonium salts of C 1 -C 4 short chain, dialiphatic long chain C 16 -C 22 such as dimethyl ammonium dichloride chloride and dimethylammonium ditallow methylisulfate; dialkyl (alkenoyl) -2-hydroxyethyl C16-C22, dialiphatic quaternary ammonium salts of short chain C1-C4 like ditallowyl-2-hydroxyethyl dimethylammonium chloride; the dialiphatic quaternary ammonium salts of C1-C4 short chain, long chain C16-C22 imidazolinium dialiphatic as methyl-1-tallowamidoethyl-2-seboimidazoiumium methylisulfate, and methyl-1-oleyl-amidoethyl-2-oleylimidazolinium methylisulfate; monoaliphatic quaternary ammonium salts of C16-C22 long chain, dialiphatic short chain C1-C4 such as dimethyl stearylbenzyl ammonium chloride, and synthetic phospholipids such as steramidopropyl PG-dimonium chloride (Phospholipid PTS from Mona Industries).
D.- Lipid hardness In embodiments further comprising a conditioning component, the article may preferably have a minimum lipid hardness value of about 0.02 kg. Consumer habits when using disposable items that have two surfaces vary considerably. When they prepare to use such items, consumers will generally moisten the item and then "foam" it before making the item contact the skin or hair. "Foaming" is achieved by carving the surfaces of the article on or against each other before using the article. If the surface containing the conditioning agents is first used in the formation of foam and the same surface is then used to contact the skin or hair, the deposition of the conditioning agents is considerably reduced due to the emulsification of the conditioning agents by the agent surfactant. If, however, the surface that does not contain the conditioning agents (for example, a surface containing surfactant) is carved together to produce the foam and the surface containing the conditioning agents is then used to contact the skin or hair, achieves maximum deposition of conditioning agents. If both surfaces of the article are treated with the conditioning agents, the same inconsistent deposition may result. Maximum deposition of conditioning agents would result only if an unfoamed surface containing conditioning agents is brought into contact with the skin or hair. It has been surprisingly discovered that if the conditioning component (the combination of conditioning agents) has a minimum lipid hardness value of 0.02 kg, this inconsistent deposition of conditioning agents is considerably reduced. It is believed that increasing the hardness of the conditioning component decreases the transfer within the substrate and also decreases the emulsification of the conditioning agents by the surfactants during the foaming step. As a result, more conditioning agents for mechanical transfer remain available through contact with the skin or hair. The lipid hardness value is a physical hardness measurement of the combination of all conditioning agents within the conditioning component. It is believed that increasing the lipid hardness value increases the deposition consistency of the conditioning agents despite variations in the foam forming techniques used by the consumer. It is believed that increasing the hardness of the conditioning component decreases the transfer within the substrate and also decreases the emulsification of the conditioning agents by the surfactants during the foaming step. As a result, more conditioning agents for mechanical transfer remain available through contact with the skin or hair. The conditioning component of the present invention has a lipid hardness value of greater than 0.02 kg, preferably larger than 0.05 kg, and more preferably larger than 0.10 kg. Preferably, the lipid hardness value of the conditioning component should not be greater than 5.00 kg, more preferably approximately 4.00 kg, more preferably 3.00 kg, because hardness levels beyond this point can negatively affect deposition of the conditioning agents in the conditioning component to the skin or hair.
Lipid hardness test The lipid hardness value is measured by a test traditionally used to measure the hardness of bar soaps. A Chatillon force gauge is used to measure the hardness value of a sample of 147.8-236.5 ml. of the conditioning component. Several readings are taken, each on a fresh sample, to obtain an average value. The Chatillon force gauge model DFIS100 is manufactured by Chatillon Corporation which is located in Greensboro, North Carolina.
Materials used to increase the lipid hardness value The cleaning and conditioning articles of the present invention may comprise a hardening material used in combination with the conditioning agents comprising the conditioning component described hereinbefore. Many materials can be used as a conditioning agent and as a lipid hardening material. In fact, any solid conditioning agent, as described above, can be used as a lipid hardening material. The amount of hardening material necessary to achieve the minimum lipid hardness value of 0.02 kg depends on the particular material used and can easily be determined by one of ordinary skill in the art. The hardening material can be used as an individual hardening material or a combination of hardening materials, and is included in concentrations in the range of 0.1% to about 99.9%, preferably from 0.5% to about 75%, more preferably from about 1% to about 50%, even more preferably from 2% to about 25%, by weight of the conditioning component.
As used herein, the term "hardening material" refers to those materials that have a boiling point above 30 ° C, preferably above 30 ° C and about 250 ° C, more preferably from 37 ° C at about 100 ° C, even more preferably from 37 ° C to about 80 ° C. Any material can be used to increase the lipid hardness value of the conditioning component provided it meets the following criteria: (i) the material must be soluble in conditioning agents of the conditioning component and (ii) the material must have a boiling point of greater than 20 ° C (for example, being a solid at room temperature). Examples of suitable hardening materials include, but are not limited to, petrolatum, highly branched hydrocarbons, fatty alcohols, fatty acid esters, vegetable oils, hydrogenated vegetable oils, polypropylene glycols, alpha-hydroxy fatty acids, fatty acids having from 10 to 40 carbon atoms, alkylamides of di-, and / or tri-basic carboxylic acids, n-acyl amino acid derivatives, and mixtures thereof. Hardening materials useful in the present invention are further described in U.S. Patent No. 4,919,934 to Deckner et al, April 24, 1990, which is incorporated herein by reference. The highly branched hydrocarbons suitable for use herein include hydrocarbon compounds having 1 to 4 carbon atoms. approximately 17 to 40 carbon atoms. Non-limiting examples of these hydrocarbon compounds include squalene, cholesterol, lanolin, docosane (i.e. a C22 hydrocarbon), and isoparaffins. Fatty alcohols suitable for use herein include monohydric alcohols, ethoxylated fatty alcohols, and fatty alcohol esters, excluding ethoxylated fatty alcohols and fatty alcohol esters useful as emulsifiers herein. Specific examples of commercially available fatty alcohols include, but are not limited to, Unilin 550, Unilin 700, Unilin 425, Unilin 400, Unilin 350, and Unilin 325., all supplied by Petrolite. The ethoxylated fatty alcohols include, but are not limited to, Unithox 325, Unithox 400 and Unithox 450, Unithox 480, Unithox 520, Unithox 550, Unithox 720, Unithox 750, all of which are available from Petrolite. Non-limiting examples of suitable fatty alcohol esters include tri-isostearyl citrate, ethylene glycol di-12-hydroxystearate, tristearyl citrate, stearyl octanoate, stearyl heptanoate, trilauryl citrate. Fatty acid esters suitable for use herein include ester waxes, monoglycerides, diglycerides, triglycerides, and mixtures thereof. Non-limiting examples of suitable ester waxes include stearyl stearate, stearyl behenate, palmityl stearate, octyldodecanolestearyl, cetyl esters, cetearyl behenate, behenyl behenate, ethylene glycol distearate, ethylene glycol dipalmitate, and beeswax.
Examples of commercial ester waxes include Kester Kees from Kester, Crodamol SS from Croda and Demalcare SPS from Rhone Poulenc. Vegetable oils and hydrogenated vegetable oils that are solid or semi-solid at room temperature of from 20 ° C to about 25 ° C are also useful herein as hardening materials. Examples of suitable vegetable oils and hydrogenated vegetable oils include fat shortening, chicken fat, goose fat, horse fat, lard oil (fatty tissue), rabbit fat, sardine oil, tallow (meat), tallow (from lamb), Chinese vegetable suet, babassu oil, cocoa butter, coconut oil, palm oil, almond seed oil, hydrogenated safflower oil, hydrogenated castor oil, hydrogenated coconut oil, hydrogenated cottonseed oil , hydrogenated fish oil, hydrogenated almond oil, hydrogenated palm oil, hydrogenated peanut oil, hydrogenated soybean oil, hydrogenated colaza oil, hydrogenated flax oil, hydrogenated rice bran oil, hydrogenated sesame oil, hydrogenated sunflower, derivatives thereof and mixtures thereof. Suitable polypropylene glycols for use herein include C4-C16 alkyl esters of polypropylene glycols, and C1-C6 carboxylic acid esters of polypropylene glycols. Non-limiting examples of these materials include butyl ether of PPG-14, stearyl ether of PPG-15, PPG-9, PPg-12, PPG-15, PPG-17, PPG-20, PPG-26, PPG-30, PPG -34 and mixtures thereof. Examples of alpha-hydroxy fatty acids and fatty acids having from 10 to about 40 carbon atoms include 12-hydroxystearic acid, 12-hydroxylauric acid, 16-hydroxyhexadecanoic acid, behenic acid, euric acid, stearic acid, caprylic acid, lauric acid , isostearic acid, and mixtures thereof. Examples of some suitable fatty acids are further described in U.S. Patent No. 5,429,816 to Hofrichter et al, on July 4, 1995; and U.S. Patent No. 5,552,136, to Motley of September 3, 1996, the descriptions of which are incorporated herein by reference. The alkylamides of di- and / or tri-basic carboxylic acids suitable for use herein include disubstituted or branched monoamides, monosubstituted or branched diamides, triamides and mixtures thereof: Some specific examples of di- and / or tri-carboxylic acid alkylamides basic include, but are not limited to, citric acid alkylamides, tricarballylic acid, aconitic acid, nitrilotriacetic acid and itaconic acid such as 1,2,3-propanetributylamide, 2-hydroxy-1,2,3-propanetributylamide, 1-propane 1, 2,3-trioctylamide, N.N'N "-tri (methyldecylamide) amine, 2 dodecyl-N, N'-dibutyl succinamide, and mixtures thereof Other suitable amides include the n-acylamino acid derivatives described in U.S. Patent No. 5,429,816, to Hofrichter et al, July 4, 1995.
Also suitable for use in the present invention are waxes having an HLB of from 1 to about 10, preferably from 6 and more preferably about 5. The HLB value system (abbreviation for "Hydrophilic-Lipophilic Balance") is fully described. , and the values for various materials are provided in The Time-Saving Guide to Emulsifier Selection (published by ICI Americas Inc., Willmington, Del., 1984), the description of which is incorporated herein by reference in its entirety Useful ester waxes include C 0 -C 0 fatty acid, fatty acid diesters of C 0 C 0 wherein the alcohol is propylene glycol, ethylene glycol, polyethylene glycol, polypropylene glycol, polyglycerin or glycerin, triglycerides or diglycerides of C fatty acids. 0-C 0, pentaerythritol tri- or tetraesters of fatty acids of C? OC or, sorbitan triesters of C10-C40 fatty acids, sucrose polyesters of C10-C40 fatty acids, having from 3 to 8 moles of substitution, myristyl myristate, paraffin, synthetic waxes such as Fischer-Tropsche waxes, microcrystalline waxes, castor wax, partially hydrogenated vegetable oils, behenate behenyl and myristyl propionate and mixtures thereof. Diester waxes include Synchrowax ERL-C (C18-36 glycosteric acid) (available from Croda) and propylene glycol diester waxes including ethylene glycol distearate and glycol distearate. Useful triglyceride waxes include Shea butter, cocoa butter, SynchrowaxHGL-C (triglyceride acid of C18-36), Synchrowax HRC (tribehenin), Synchrowax HRS-C [tribehenin (and) calcium behenate] (all available from Croda Inc.), Tristearin, trimyristate and fully hydrogenated vegetable oils and mixtures thereof. A mixture of diester and triglyceride waxes in a ratio of from 5: 1 to about 1: 1, and more preferably from 4: 1 to about 1: 1 is preferred. Waxes useful in the compositions of the present invention are described in the following, all of which are incorporated herein by reference in their entirety: US patent. No. 5,219,558 to Woodin, Jr. et al, June 15, 1993; patent of E.U.A. No. 4,049,792, to Elsnau, September 20, 1977; patent of E.U.A. No. 4,151, 272, to Geary et al, April 24, 1975; patent of E.U.A. No. 4,229,432, to Geria, dated October 21, 1980; patent of E.U.A. No. 4,280,994, to Turney, July 28, 1981; patent of E.U.A. No. 4,126,679, to Davy et al, November 21, 1978; and in European Patent Application Publication No. 1 17,070 to May, August 29, 1984; "The Chemistry and Technology of Waxes", A.H.Warth, 2nd edition, reprinted in 1960, Reinhold Publishing Corporation, pp. 391-393 and 421; "The Petroleum Chemicals Industry", R.F. Goldstein and A.L.Waddeam, 3rd edition (1967), E &F.N. Span Ltd., pp. 33-40; "The Chemistry and manufacture of Cosmetics", M.G.DeNavarre, 2nd edition, (1970), Van Nostrand & Company, pp. 354-376; and in "Encyclopedia of Chemical Technology", vol. 24, Kirk Othmer, 3rd edition (1979), pp. 466-481.
Non-limiting examples of additional hardening materials are those selected from the group consisting of sorbitan esters, glyceryl esters, polyglyceryl esters, methylglucose esters, sucrose esters, ethoxylated fatty alcohols, ethoxylates of hydrogenated castor oil, ethoxylated sorbitan esters, polymeric emulsifiers and silicone emulsifiers. Sorbitan esters are useful in the present invention. The sorbitan esters of branched-chain, saturated and unsaturated C16-C22 fatty acids are preferable. Due to the manner in which they are typically manufactured, those sorbitan esters usually comprise mixtures of mono-, di-, tri-, etc., esters. Representative examples of suitable sorbitan esters include sorbitan monooleate (for example SPAN ® 80), sorbitan sesquioleate (for example Arlacel ® 83), sorbitan monoisostearate (for example CRILL ® manufactured by Croda), sorbitan stearates (for example SPAN) ® 60), sorbitan trioleate (for example SPAN ® 85), sorbitan sorbate (for example SPAN ® 65), sorbitan dipalmitatos (for example SPAN ® 40), and sorbitan stearate. Sorbitan monoisostearate and sorbitan sesquioleate are particularly preferred emulsifiers for use in the present invention. Other hardeners suitable for use in the present invention include, but are not limited to, glyceryl monoesters, preferably glyceryl monoesters of branched chain fatty acids, saturated, unsaturated C16-C22 such as glyceryl oleate, glyceryl monostearate, monopalmitate of glyceryl, glyceryl monobehenate, and mixtures thereof; polyglyceryl esters of branched chain fatty acids, saturated, unsaturated C16-C22 such as polyglyceryl-4 isostearate, polyglyceryl-3 oleate, diglycerol monoleate, tetraglycerol monooleate, and mixtures thereof; methylglucose esters, preferably branched chain, saturated, unsaturated C 16 -C 22 fatty acid methyl glucose esters such as methyl glucose dioleate, methyl glucose sesquiisostearate, and mixtures thereof; fatty acid esters of sucrose, preferably sucrose esters of branched chain fatty acids, saturated, unsaturated of C 2 -C 22 such as sucrose stearate, sucrose trilaurate, sucrose distearate (for example Crodesta® F10), and mixtures thereof: ethoxylated C12-C22 fatty alcohols such as oleth-2, oleth-3, steareth-2, and mixtures thereof; ethoxylates of hydrogenated castor oil such as hydrogenated castor oil PEG-7, ethoxylates of sorbitan ester such as sorbitan peroleate PEG-40, Polysorbate-80, and mixtures thereof; polymeric emulsifiers such as copolymer of ethoxylated dodecylglycol; and silicone emulsifiers such as laurylmethicone copolyol, cetyldimethicone, dimethicone copolyol, and mixtures thereof. Other useful hardeners include, but are not limited to, phosphatidylcholines and compositions containing phosphatidylcholines such as lecithins; C16-C22 long chain fatty acid salts such as sodium stearate; dialiphatic quaternary ammonium salts of C 1 -C 4 short chain, dialiphatic long chain C 16 -C 22 such as dimethyl ammonium dichloride chloride and dimethylammonium ditallow methylisulfate; C16-C22 dialkoyl (alkenoyl) -2-hydroxyethyl, dialiphatic quaternary ammonium salts of short chain C1-C4 such as ditallowyl-2-hydroxyethyl dimethylammonium chloride; dialiphatic quaternary ammonium salts of long chain C 16 -C 22 imidazolinium such as methyl-1-tallowamidoethyl-2-seboimidazolinium methylisulfate, and methyl-1-oleyl-amidoethyl-2-oleylimidazolinium methylisulfate; monoaliphatic quaternary ammonium salts of C16-C22 long chain, dialiphatic short chain C1-C4 such as dimethyl stearylbenzyl ammonium chloride, and synthetic phospholipids such as steramidopropyl PG-dimonium chloride (Phospholipid PTS from Mona Industries).
V. - Weight ratios and percentages by weight In the present invention, the weight ratio of the surfactant to the conditioning component is less than about 40: 7, preferably less than 5: 1, more preferably less than about 2.5: 1, and more preferably less than 1: 1. In certain embodiments of the present invention, the conditioning and cleaning component, which is defined as comprising a surfactant and a conditioning component further comprising an oil-soluble conditioning agent and a water-soluble conditioning agent, the surfactant comprises from 1% to about 75%, preferably from 10% to about 65%, and more preferably from 15% to about 45%, by weight of the conditioning and cleaning component, and the conditioning component comprises from 15% to about 99%, preferably from 20% to about 75%, and more preferably from 25% to about 55%, by weight of the conditioning and cleaning component.
VI.- Surface to saturation ratio A. - Method for mediating the surface application of conditioning agents The products of the present invention may preferably have the conditioning agent substantially on the surface of the substrate. By "substantially above the surface of the substrate" it means that the surface to saturation ratio is larger than about 1.25, preferably larger than 1.50, and preferably larger than 2.00, still more preferably larger than 2.70, and more preferably larger. that 3.00. The surface to saturation ratio is a ratio of the measurement of the conditioning agent within the substrate. These measurements are obtained from the Total Attenuated Reflection Spectroscopy (ATR) FT-IR, the use of which is well known to someone of normal skill in the analytical chemistry technique. The same method can be applied to measure the combination of conditioning agent and active ingredients.
The procedure to obtain the measurements is as follows: Instrument Installation A BioRad FTS-7 spectrometer, manufactured by Bio Rad Labs, Digital Laboratory Division, located in Cambridge, MA, is used to collect the infrared spectrum. Typically, measurements consist of 100 sweeps at a resolution of 4 cm'1. The collection lenses consist of a flat 60 degree ZnSe ATR glass, manufactured by Graseby Specac, Inc., located in Fairfield, CT. The data is collected at 25 ° C and analyzed using Grams 386 software, distributed by Galactic Industries Corp., located in Salem, New Hampshire. Before measuring, the glass is cleaned with a suitable solvent. The sample is placed on the ATR glass and maintained under a constant weight of 4.535 kg.
Experimental procedure (1) Measurement of the reference spectrum (background): First clean the ATR cell with a suitable solvent (for example isopropyl alcohol). Then air-dry the ATR cell. Then measure the spectrum of the background (typically 100 sweeps @ a resolution of 4 cm "1). (2) Place the substrate on top of the glass ATR: first the flat substrate is placed on the measuring platform. A weight of 4.535 kg is then placed on top of the substrate. Then, measure the spectrum (typically 100 sweeps @ at a resolution of 4 cm "1) .The substrate acts as an internal standard because the absorption capacity of the substrate can only be identified. (3) Analyze the spectrum for conditioning ingredients first identifying the absorption capacity due to the substrate and measuring the maximum point, then identifying the maximum points of absorption capacity due to the conditioning agent and measuring the maximum point.The following contains some examples: 1 polyester: C = O stretch mode at 1710 cm "1 2 polypropylene: C-H stretch mode at 2822 cm" 1 3 petrolatum: C-H stretch mode at 2923 cm "1 4 glycerin: C-O stretch mode at 1710cm" 1 Obtaining the surface to saturation ratio (1) If the ratio of absorption capacity of the conditioning agent to the absorption capacity of the substrate is > 1.25, then the conditioning agent is substantially on the surface of the substrate. This is because the FT-IR absorption capacity reading measures the amount of conditioning agent up to 7 microns in the substrate. (2) If the ratio of absorption capacity of the conditioning agent to the absorption capacity of the substrate is < 1 .25, then the conditioning agent is not substantially on the surface.
B. - Methods for maintaining the conditioning component substantially on the surface of the substrate. It has been discovered that certain methods and improvements in the compositions greatly improve the effectiveness and effectiveness of delivering conditioning components to the skin or hair. Those procedures and improvements in the compositions allow the same or better effect of the conditioning component at lower levels by keeping the conditioning component on the surface of the substrate. The products of the present invention effectively and efficiently deliver conditioning agents to the skin or hair by maintaining the conditioning component, comprising the conditioning agents, substantially on the surface of the substrate. The following subsections discuss in further detail the procedural and compositional improvements that allow the surface to saturation ratio of greater than or equal to 1.25. All of the following process and composition improvements can be used individually or in combination to keep the conditioning agent substantially on the surface. The term "chemical component", as used herein, means the conditioning component or a combination of conditioning agent and the active ingredient.
Guimic substrate treatment A method for substantially maintaining the chemical component on the surface of the substrate is by chemically treating the substrate or substrate fibers with either a hydrophilic or a hydrophobic substance. The choice of the appropriate substance (hydrophilic or hydrophobic) depends on the chemical component that is to be deposited. For example, if an oil-soluble conditioning agent is to be deposited on the skin or hair, the substrate or its fibers would typically be treated with a hydrophilic substance, and vice versa. Because most substances are hydrophobic in nature, for example, normally derived from polyolefins, this section will concentrate on the hydrophilic chemical treatment of the substrate. Any of a wide variety of surfactants, including ionic and nonionic surfactants, can be used to hydrophobically modify the substrate. Suitable surfactants can be internal modifiers, for example, the modifying compounds are added to the polymer composition before the illation or fiber formation, or the topical modifiers, for example, the modifying compounds are applied topically during or subsequent to the formation of fibers or non-woven networks. An internal modification procedure is described in U.S. Patent No. 4,578,414 to Sawyer et al, and a method of topical modification is described in U.S. Patent No. 5,057,361, to Sayovitz et al, both references being incorporated herein by reference. its entirety Non-limiting examples of suitable surfactants include silicon-based surfactants, for example, modified polyalkylene oxide polydimethylsiloxane, fluoroaliphatic surfactants, for example perfluoroalkyl polyalkylene oxides, and other surfactants, for example non-ionic surfactants of actyl-phenoxy polyethoxy ethanol , polyether alkylaryl alcohols, and polyethylene oxides. Commercially available surfactants suitable for the present invention include various surfactants based on poly (ethylene oxide), available under the tradename Triton, for example, grade X-102, from Rohm and Hass Corp.; various polyethylene glycol-based surfactants available under the trade name Emerest, eg grades 2620 and 2650, from Emery Indust .; various surfactants based on polydimethylsiloxane modified alkylene oxide available under the tradename Silwet, for example grade Y12488, from OSI Specialty Chemicals; and alkenyl succinamide surfactants, available under the trade name Lubrizol, for example grade OS85870, from Lubrizol Corp .; and polyoxyalkylene modified fluoroaliphatic surfactants available from Minnesota Mining and Manufacturing Co. The amount of surfactants required and the hydrobility of the substrate or modified fibers of the substrate for each application will vary depending on the type of surfactant selected and the polymer components. used. In general, the surfactant can be added, topically or internally, in the scale of from 0.1 to about 5%, preferably from 0.3% to about 4% by weight of the substrate or the fibers of the substrate.
Increase in viscosity Another method for maintaining the chemical component on the surface of the substrate is increasing the viscosity before application on the substrate. This prevents saturation of the substrate with the chemical component. In general there are two methods to increase the viscosity of the chemical component: (i) application on the substrate at the transition temperature of the chemical component; and (ii) introducing a thickener to the chemical component mixture before application to the substrate. A combination of these methods is preferable.
Application of phase transition temperature to the substrate One method for maintaining the chemical component on the surface of the substrate is to apply the chemical component to the substrate at the phase transition temperature of the chemical component. This method can be used with any chemical component in which the phase transition temperature of the chemical component is above about 35 ° C (eg Vicoso at room temperature): The phase transition temperature is defined, as used in the present, as the temperature at which the chemical component is transformed from a fluid, liquid to a viscous state. In essence, this method applies the chemical component to the temperature at which the chemical component becomes viscous from a fluid liquid state during the cooling process. Typically the chemical component is applied to the substrate by melting or heating. Alternatively, the chemical component can be heated and dissolved in a solvent before application on the substrate. However, some chemical components can be viscous, however, enough fluids to be applied without heating. If a chemical component has a transition temperature at about room temperature or slightly above room temperature the other methods within this section should be used to maintain the chemical component on the surface of the substrate. The transition temperatures (also known as melting points) of most chemicals can be easily obtained from The Merck Index, tenth edition, (1983) and the CTFA Cosmetic Ingredient Handbook, 2nd Edition (1992), which are incorporated to the present by reference in its entirety. A corollary to the application of transition temperature to the substrate is by supercooling the chemical component during application to the substrate. By supercooling means that the cooling rate is artificially increased above the normal rate of cooling to room temperature. This provides the double benefit of having fluidity of the chemical component during processing and yet reaching the transition phase temperature before the substrate is saturated by the chemical component. This method would be used when a chemical component is viscous and plastic at room temperature.
Thickening agent If a chemical component is a liquid at room temperature (for example, not viscous), the chemical component will not remain mainly on the surface of the substrate. Instead, the chemical component will tend to migrate and flow into the empty volume of the substrate. The present method provides a solution by introducing a thickening agent into the chemical component. This increases the viscosity of the chemical component thereby achieving a result equivalent to the application of phase transition temperature to the substrate. Because the viscosity of the chemical component is effectively increased, it remains substantially above the surface of the substrate without saturating the substrate. In general, the thickening agent must be viscous at room temperature, and must be mixable in the chemical component. The phase transition temperatures and the suitable viscosities of the thickening agent will vary drastically with the particular thickener. Nevertheless, typically, the phase transition temperature of the thickening agent should be greater than about 35 ° C, preferably larger than 40 ° C. In general, anything that is viscous at room temperature can be a thickener. The CTFA Cosmetic Ingredient Handbook, second edition, (1992), which is incorporated herein by reference in its entirety, discloses many suitable thickeners. In fact, any conditioning agent, as described above, which is more viscous than the chemical component and which is miscible in the chemical component can be a suitable thickener. Nonlimiting examples of useful thickening agents of the present invention are selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol ethoxylates having a degree of ethoxylation in the range from 2 to about 30, sorbitan esters, glyceryl esters, polyglyceryl esters, esters of methyl glucose, sucrose esters, ethoxylated sorbitan esters, natural and synthetic waxes, polyacrylic resins and polyacrylic resins are hydrophobically modified starches, gums, cellulose ethers, polycationic polymers, nonionic polymers, polyethylene glycols (PEG) and mixtures thereof. Nonlimiting examples of useful thickening agents of the present invention include stearic acid, behenic acid, stearyl alcohol, cetyl alcohol, sorbitan monooleate, sorbitan sesquioleate monoisostearate, sorbitan, sorbitan stearates, sorbitan trioleate, sorbitan tristearate, dipalmitates sorbitan, sorbitan stearate, glyceryl oleate, glyceryl monostearate, glyceryl monopalmitate, glyceryl monobehenate, polyglyceryl-4 isostearate, polyglyceryl-3 oleate, diglycerol monooleate, tetraglycerol monooleate, methyl glucose dioleate, methyl glucose sesquiisostearate stearate sucrose trilaurate, sucrose, oleth-2 distearate sucrose, oleth-3, steareth-2, PEG-40 petrolatum sorbitan, Polysorbate-80, beeswax, polyethylene wax, carbopol, Pemulen, corn starch , tapioca, guar gum, gum arabic, hydroxypropylcellulose, hydroxyethylcellulose, carboxymethylcellulose, Reten 201, Kymene 557H , Acco 71 12 Carbowax.
Non-uniform application to the substrate Another method for substantially maintaining the chemical component on the surface of the substrate is by applying the chemical component non-uniformly to the surface of the substrate. By "non-uniform" it means that the quantity, pattern of distribution, etc., of the chemical component can vary over the surface of the substrate. For example, some portions of the substrate surface may have larger or smaller amounts of the chemical component, including portions of the surface that have no chemical component.
Order of application of ingredients to the substrate Another method for substantially maintaining the chemical component on the surface of the substrate is by determining the order of application of ingredients to the substrate. In general, the best results are obtained when the chemical component is added on a dry substrate. In this way, first applying the foaming surfactant, and then drying the substrate treated with surfactant prior to the application of the chemical component will greatly improve the supply of the chemical component.
VIL- Additional ingredients The articles of the present invention may comprise a wide variety of optional ingredients. Some of those ingredients are listed in more detail in the present. Particularly useful are several useful active ingredients for providing various non-conditioning and non-cleansing benefits to the skin or hair during cleaning and conditioning procedures. In these compositions, the article is useful for administering the active ingredient to the skin or hair.
A. Active ingredients The compositions of the present invention may comprise a safe and effective amount of one or more active ingredients or pharmaceutically acceptable salts thereof.
The term "safe and effective amount" as used herein means an amount of an active ingredient high enough to modify the condition to be treated or to provide the desired benefit to the skin, but low enough to avoid serious effects secondary in a reasonable ratio of benefit to risk within the scope of reliable medical judgment. What is a safe and effective amount of active ingredient will vary with the specific active ingredient, the ability of the active ingredient to penetrate through the skin, the age, health condition and condition of the user's skin and other similar factors. The active ingredients useful herein can be categorized by their therapeutic benefit and their postulated mode of action. However, it should be understood that the active ingredients useful herein may, in some instances provide more than one therapeutic benefit or operate by more than one mode of action. Therefore, the classifications herein are made for the sake of convenience and not to limit the active ingredient to a particular application or applications listed. Also, the pharmaceutically acceptable salts of these active ingredients are useful herein. The following active ingredients are useful in the compositions of the present invention.
Anti-acne Active Ingredients Examples of useful anti-acne active ingredients include keratolytics such as salicylic acid (o-hydroxybenzoic acid), salicylic acid derivatives such as 5-octanoyl salicylic acid and resorcinoi, retinoids such as retinoic acid and its derivatives (e.g., cis and trans); amino acids containing sulfur D and L and their derivatives and salts, particularly their N-acetyl derivatives, a preferred example of which is N-acetyl-L-cysteine; lipoic acid; antibiotics and antimicrobials such as benzoyl peroxide, octopirox, tetracycline, 2, 4, 4'-trichloro-2'-hydroxy diphenyl alcohol, 3,4'-trichlorobanalide, azelaic acid and its derivatives, phenoxyethanol, phenoxypropanol, phenoxy isopropanol , ethyl acetate, clindamycin and meclocycline; sebostats such as flavonoids; and bile salts such as scimolsulfate and its derivatives, deoxycholate and cholate.
Active ingredients for anti-wrinkles and anti-antrophy of the skin Examples of active ingredients for anti-wrinkles and anti-anantrophy of the skin include retinoic acid and its derivatives (for example, cis and trans); retinol; retinyl esters; niacinamide; salicylic acid and derivatives thereof, amino acids D and L containing sulfur and its derivatives and salts, particularly the N-acetyl derivatives, a preferred example of which is N-acetyl-L-cysteine; thiols, for example, etantiol; hydroxy acid, phytic acid, lipoic acid; lysophosphatidic acid and skin peeling agents (eg, phenol and the like).
Non-spheroidal anti-inflammatory active ingredients (NSAIDS) Examples of NSAIDS include the following categories derived from propionic acid; acetic acid derivatives; phenamic acid derivatives; biphenylcarboxylic acid derivatives; and oxicamas. All of these NSAIDS are fully described in U.S. Patent 4,895,459 to Sunshine et al, issued January 15, 1991 incorporated herein by reference in its entirety. Examples of useful NSAIDS include acetylsalicylic acid, ibuprofen, naproxen, benoxaprofen, flurbiprofen, fenoprofen, fenbufen, ketoprofen, indoprofen, piprofen, carprofen, oxaprozin, pranoprofen, microprofen, thioxaprofen, suprofen, alminoprofen, thiaprofenic acid, fluprofen and bucilloxic acid. Also useful are spheroidal anti-inflammatory drugs that include hydrocortisone and the like.
Topical Anesthetics Examples of topical anesthetic drugs include benzocaine, lidocaine, bupivacaine, chlorprocaine, dibucaine, etidocaine, mepivacaine, tetracaine, diclonine, hexylcaine, procaine, cocaine, ketamine, pramoxin, phenol, and pharmaceutically acceptable salts thereof.
Artificial tanning agents and artificial tanning accelerators Examples of artificial tanning agents and accelerators include dihydroxyacetaone, tyrosine, tyrosine esters such as ethyl tyrosinate and phospho-DOPA.
Antimicrobial and antifungal active ingredients Examples of antimicrobial and antimicrobial active ingredients include β-lactam drugs, quinolone drugs, ciprofloxacin, norfloxacin, tetracycline, erythromycin, amikacin, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4, 4'-trichlorobanilide, phenoxyethanol, phenoxypropanol, phenoxyisopropanol, doxycycline, capreomycin, chlorhexidine, chlortetracycline, oxytetracycline, clidamycin, ethambutol, hexamidine isethionate, metronidazole, pentamidine, gentamicin, kanamycin, liomycin, metacycline, methenamine, minocycline, neomycin, netilmicin, paromonicin, streptomycin, tobramycin, miconazole, tetracycline hydrochloride, erythromycin, zinc erythromycin, erythromycin estolate, erythromycin stearate, amicacinsulfate, doxycycline hydrochloride, capreomyinsulfate, chlorhexidingluconate, chlorhexidine hydrochloride, chlortetracycline hydrochloride, oxytetracycline hydrochloride, clindamycin hydrochloride, hydrochloride d ethambutol, metronizadol hydrochloride, pentamidine hydrochloride, gentamicinsulfate, canamicin sulfate, lineomycin hydrochloride, metacycline hydrochloride, methenaminhipurate, methenaminmandelate, minocycline hydrochloride, neomycin sulfate, netilmicin sulfate, paromomycin sulfate, streptomycin sulfate, tobramycin sulfate, miconazole hydrochloride, amanfadine hydrochloride, amanfadinsulfate , octopirox, parachloromethyleneol, nystatin, tolnaftate, zinc pyrithione and clotrimazole. Examples of preferred actives useful herein include those selected from the group consisting of salicylic acid, benzoyl peroxide, 3-hydroxybenzoic acid, lactic acid, 4-hydroxybenzoic acid, acetylsalicylic acid, 2-hydroxybutanoic acid, 2-hydroxypentanoic acid, 2-hydroxyhexanoic acid, cis-retinoic acid, trans-retinic acid, retinol, phytic acid, N-acetyl-L-cysteine, lipoic acid, azelaic acid, arachidonic acid, benzoylperoxide, tetracycline, ibuprofen, naproxen, hydrocortisone, acetominophen, resorcinium, phenoxyethanol, phenoxypropanol, phenoxyisoproranol, 2, 4, 4'-trichloro-2'-hydroxydipenilic acid, 3,4'-trichlorocarbanilide, octopirox, lidocaine hydrochloride, clotrimazole, micronazole, neocicin sulfate and mixtures thereof.
Active Sunscreen Ingredients The active ingredients of sunscreen are also useful herein. A wide variety of active sunscreen agents are described in U.S. Patent No. 5,087,445 to Haffey et al, issued February 11, 1992; U.S. Patent No. 5,073,372 to Turner et al, issued December 17, 1991; U.S. Patent No. 5,073,371 to Turner et al, issued December 17, 1991; and Segarin et al, in chapter VIII, page 189 et seq, of Cosmetics Science and Technology; which are hereby incorporated by reference in their entirety. Non-limiting examples of sunscreens that are useful in the compositions of the present invention are those selected from the group consisting of 2-ethylhexyl p-methoxycinnamate, 2-ethylhexyl N, N, -dimethyl-p-aminobenzoate, p-aminobenzoic acid, -phenylebenzimidazole-5-sulfonic acid, octocrylene, oxybenzone, homomethylsalicylate, octylsalicylate, 4,4'-methoxy-t-butyldibenzoylmethane, 4-isopropyldibenzoylmethane, 3-benzylidenecamphor, 3- (4-methylbenzylidene) acancer, titanium dioxide, zinc oxide , silica, iron oxide, and mixtures thereof. Still other useful sunscreens are those described in U.S. Patent No. 4,937,370 to Sabatelli, issued June 26, 1990; and U.S. Patent No. 4,999,186, to Sabatelli et al, issued March 12, 1991; these two references are incorporated herein by reference in their entirety. Especially preferred examples of these sunscreens include those selected from the group consisting of 4-N, N-2 (-ethylhexyl) methylaminobenzoic acid ester of 2,4-dihydroxybenzophenone, 4-N, N- (2-ethylhexyl) ester methylaminobenzoic acid with 4-hydroxydibenzoylmethane, 4-N, N- (2-ethylhexyl) -methylaminobenzoic acid ester of 2-hydroxy-4- (2-hydroxyethoxy) benzophenone, 4-N, N- (2-ethylhexyl) ester ) -methylaminobenzoic acid 4- (2-hydroxyethoxy) dibenzoylmethane, and mixtures thereof: Exact quantities of sunscreens that can be used will vary depending on the chosen sunscreen and the desired sun protection factor (SPF) that will be achieved. FPS is a commonly used photoprotection measure of a sunscreen against erythema. See Federal Reqister Vol. 43, No. 166, pp. 38206-38269, August 25,1978, which is incorporated herein by reference in its entirety. Non-limiting examples of preferred active ingredients useful herein include those selected from the group consisting of salicylic acid, benzoyl peroxide, niacinamide, cis-retinoic acid, trans-retinoic acid, retinol, retinylpalmitate, phytic acid, N-acetyl- cysteine, acelaic acid, lipoic acid, resorcinol, lactic acid, glycolic acid, and ibuprofen, naproxen, hydrocortisone, phenoxyethanol, phenoxypropanol, phenoxypropanol, 2,4,4, -trichloro-2'-hydroxydiphenyl ether, 3,4 , 4'-trichlorocarbanilide, 2-ethylhexyl p-methoxycinnamic acid, oxybenzone, 2-phenylbenzimidozole-5-sulfonic acid, dihydroxyacetone and mixtures thereof.
B. Cationic Surfactants The articles of the present invention may optionally include one or more cationic surfactants, provided that these materials are selected so as not to interfere with the total foaming characteristics of the required foaming surfactants. The cationic surfactants are useful as anti-static agents or as emulsifiers. Non-limiting examples of cationic surfactants useful herein are described in McCutcheon's, Detergents and Emulsifiers. North American edition (1986), published by Publishing Corporation; and McCutcheon's, Functional Materials, North American Edition (1992); which are incorporated herein by reference in their entirety. Non-limiting examples of cationic surfactants useful herein include cationic alkylammonium salts having the formula: R! R2R3R4N + X "wherein Ri is selected from an alkyl group having from about 12 to about 18 carbon atoms or aromatic, aryl or alkaryl groups, which have from about 12 to about 18 carbon atoms; R2, R3 and R4 are independently selected from hydrogen, an alkyl group having from about 1 to about 18 carbon atoms, or aromatic, aryl or alkaryl groups having from about 12 to about 18 carbon atoms; and X is an anion selected from chloride, bromide, iodide, acetate, phosphate, nitrate, sulfate, methylisulfate, etiisulfate, ethoxylate, lactate, citrate, glycolate and mixtures thereof. Additionally, the alkyl groups may also contain ether linkages, or substituents of the hydroxyamino group (for example, the alkyl groups may contain portions of polyethylene glycol and prolipropylene glycol). More preferably, Ri is an alkyl group having from about 12 to about 18 carbon atoms; R2 is selected from H or an alkyl group having from about 1 to about 18 carbon atoms; R3 and R4 are independently selected from H an alkyl group having from about 1 to about 3 carbon atoms; and X is as described above.
More preferably, Ri is an alkyl group having from about 12 to about 18 carbon atoms; R2, R3 and R4 are selected from H or an alkyl group having from about 1 to about 3 carbon atoms; X is as described above. Alternatively, other useful cationic surfactants include aminoamides, wherein the above structure Ri is alternatively R5cO- (CH2) n-, wherein R5 is an alkyl group having from about 12 to about 22 carbon atoms, and n is an integer from about 2 to about 6, more preferably from about 2 to about 4, and more preferably from about 2 to about 3. Non-limiting examples of these cationic emulsifiers include chloride-phosphate stearamidopropyl PG-dimonium, stearamidopropylethyldimonethoesulfate, stearamidopropyl dimethyl (myristylacetate) ammonium, stearamidopropyldecyl-cetearylammonium ethoxylate, stearamidopropyl dimethyl ammonium chloride, stearamidopropyl dimethyl ammonium lactate and mixtures thereof. Non-limiting examples of cationic surfactants of quaternary ammonium salts include those selected from the group consisting of cetyl ammonium chloride, cetyl ammonium bromide, lauryl ammonium chloride, laurylammonium bromide, stearylammonium chloride, stearylammonium bromide, cetyldimethyl ammonium chloride, cetildimetilamonio, lauryldimethylammonium chloride, bromide lauryl, of stearyldimethylammonium chloride, bromide stearyldimethylammonium of cetildimetilamonio chloride, bromide cetildimetilamonio, lauryldimethylammonium chloride, bromide lauryl, stearyl chloride, bromide stearyltrimethylammonium lauryldimethylammonium chloride, estearildimetilcetildisebodimetilamonio chloride, dicethylammonium chloride, dicythylammonium bromide, dilaurammonium chloride, dilauryl ammonium bromide, disterearyl ammonium chloride, distearylammonium bromide, dicetylmethylammonium chloride, dicetylmethylammonium bromide, chlorine urea of dilaurylmethylammonium, dilaurylmethylammonium bromide, distearylmethylammonium chloride, distearyl methylmethyl chloride, distearyl methyl ammonium bromide and mixtures thereof. Additional quaternary ammonium salts include those in which the C12 to C22 alkylcarbon chain is derived from a tallow fatty acid or a coconut fatty acid. The term "tallow" refers to an alkyl group derived from tallow fatty acids (usually hydrogenated tallow fatty acids), which generally has mixtures of alkyl chains on the C16 to C18 scale. The thermal "coconut" refers to an alkyl group derived from a coconut fatty acid, which generally has mixtures of alkyl chains on the scale of C12 to C14. Examples of quaternary ammonium salts derived from these coconut and tallow sources include ditallowdimethylammonium chloride, disodimethylammoniomethylsulfate, di (sebohydrogenated) dimethylammonium chloride, di (sebohydrogenated) dimethylammonioacetate, disodiopropyl ammonium phosphate, disodimethylammonitrate, di (cocoalkyl) dimethylammonium chloride, di ( cocoalkyl) dimethylammonium, tallowammonium chloride, cocoammonium chloride, stearamidopropyl PG dimonium chloride-phosphate, stearamidopropyl dimothioethosulfate, stearamidopropyl dimethyl (myristylacetate) ammonium chloride, stereoamidopropylmethylcetethylammonium ethoxylate, stearamidopropyl dimethyl ammonium chloride, propyl dimethyl ammonium lactam stearate and mixtures thereof. Preferred cationic surfactants useful herein include those selected from the group consisting of dilauryldimethylammonium chloride, chlorurodistearyldimethylammonium, dimyristylammonium chloride, dipalmityldimethylammonium chloride, distearyldimethylammonium chloride, and mixtures thereof.
C- Other optional ingredients The compositions of the present invention may comprise a wide variety of other optional components. These additional components must be pharmaceutically acceptable. The CTFA Cosmetic Ingredient Handbook, 2a. Edition, 1992, which is incorporated by reference to the present in its entirety, discloses a wide variety of non-limiting cosmetic and pharmaceutical ingredients commonly used in the skin care industry, which are suitable for use in the compositions of the present invention. . Non-limiting examples of functional ingredient classes are described on page 537 of this reference. Examples of these and other functional classes include: abrasives, absorbents, anti-caking agents, antioxidants, vitamins, binders, biological additives, pH improving agents, volume, chelating agents, chemical additives, colorants, astringents with cosmetics, cosmetic biocides, denaturants, drug astringents, external analgesics, film formers, fragrance components, humectants, opacifying agents, pH adjusters, preservatives, promoters, reducing agents, skin bleaching agents, and sunscreen agents. Also useful herein are the aesthetic components such as fragrances, pigments, dyes, essential oils, skin sensitizers, astringents, skin softening agents and skin healing agents.
VIII.- Manufacturing methods The disposable disposable personal care and conditioner articles of the present invention are manufactured by the simultaneous addition, or separately on or impregnated in a non-water-soluble substrate, of a surfactant of foaming, a conditioning component and a fragrance component, characterized in that said resulting article is substantially dry. By "separately" it means that the surfactants and the conditioning agents can be added sequentially, in any order without having been combined together first. Preferably the fragrance component must be added on or impregnated in the substrate, or in any layer thereof, in a manner separated from the surfactants, due to the possibility of solubilizing the water-soluble encapsulation material. The fragrance component is also preferably added on or impregnated into the substrate or any layer thereof, when the substrate is dry. When there is more than one layer, the surfactant and / or the conditioning component can also be added on or impregnated in each layer in any sequence. Alternatively, the foaming surfactant and / or the conditioning component can be added onto or impregnated into the substrate. The treatment with the foaming surfactant, the conditioning component and / or the fragrance component can be achieved at any time before or after joining the first layer and the second layer. Without considering the order of treatment, the excess surfactant, conditioning component and / or fragrance component must be removed (for example by means of a clamping roller method). Therefore, the treated material (e.g., first layer 100, second layer 200, both layers 100 and 200, or bonded substrate) must be dried by conventional means. For example, before joining the first layer 100 to the second layer 200, the second layer can be treated with the foaming surfactant. After joining the two layers, any of the outer surfaces (e.g. unbonded surfaces) of layers 100 and / or 200 may be treated with the conditioning component and / or the fragrance component. Alternatively, the foaming surfactants and conditioning agents can be added onto or impregnated in the second layer 200 at the same time before joining the two layers. Alternatively, the foaming surfactants and the conditioning agents they can be combined together before being added on or impregnated in the second layer 200. In any sequence, the fragrance component should not be added in conjunction with the surfactant. If the fragrance component is added after the surfactant, any excess solvent (eg water) must be removed before adding the fragrance component. Alternatively, before joining the two layers, the first layer 100 can be treated with the foaming surfactant using methods which do not cause the first layer to elongate or spread. This can be achieved in the manufacture of the first layer or by various application methods well known to those of ordinary skill in the art. Non-limiting examples of application methods include extrusion coating and slot coating. The surfactant, the conditioning agents, the fragrance component, and any optional components can be added onto or impregnated in any layer (100 or 200) or the resulting bonded layers (100 v 200) by any means known to those skilled in the art. technique, for example by spraying, laser printing, splashing, dipping, soaking or coating. When water or moisture is used or is present in the manufacturing process, the fragrance component d is added after the resulting treated substrate and then dried so that it is substantially free of water. The treated substrate can be dried by any means known to those skilled in the art. Non-limiting examples of known drying media include the use of convection ovens, radiant heat sources, microwave ovens, forced air ovens, and hot rollers or cans. Drying also includes air drying without the addition of heat energy, different from that present in the environment. In addition, a combination of various drying methods can be used.
IX.- Methods of cleaning and conditioning the skin or hair The present invention also relates to a method for cleaning and conditioning the skin or hair with a personal cleansing article of the present invention. These methods comprise the steps of moistening with water a disposable, substantially dry personal cleansing article, comprising a water-insoluble substrate, a foaming surfactant, and a conditioning component, and contacting the skin or hair with said article. moistened In additional embodiments, the present invention is also useful for delivering various active ingredients to the skin or hair. The articles of the present invention are substantially dry and are designed to be moistened with water before use. The article is moistened by immersion in water or by placing it under a stream of water. The foam is generated in the article by mechanically shaking and / or deforming the article either before or during contact of the article with the skin or hair. The resulting foam is useful for cleansing and conditioning the skin or hair. During the cleaning procedure and subsequent rinsing with water, conditioning agents and active ingredients are deposited on the skin or hair. The deposition of conditioning agents and active ingredients is improved by physical contact of the substrate with the skin or hair.
X. Method for consistently depositing conditioning agents and any active ingredients on the skin or hair The articles of the present invention are useful for consistently depositing the conditioning agents of the present invention to the skin or hair. In additional embodiments wherein an active ingredient is present, the compositions are also useful for consistently depositing the active ingredient on the skin or hair. The articles of the present invention have a deposition consistency of greater than 60%, preferably larger than 65%, more preferably larger than about 70% and more preferably larger than about 75%. The measurement of deposition consistency is the quotient obtained from the division of the deposition of conditioning agents through "foam formation and non-ideal use" by the deposition of conditioning agents through "foam formation and ideal use". The non-ideal foaming, as used herein, means that foaming is achieved by carving the surface of the article containing the conditioning agents and then contacting the skin or hair with the same surface. This causes inefficient deposition of the conditioning agents because some conditioning agents become emulsified by the surfactant. The ideal foam formation, as used herein, means that foaming is achieved by carving the surface of the article that does not contain the conditioning agents and then contacting the skin or hair with the surface containing the conditioning component. The same reference points would be applied if both surfaces of the substrate are treated with the conditioning agents (for example the deposition obtained from foaming and making skin contact with the same surface with foam containing the emulsifying conditioning agents against making contact on the skin with the surface without foam containing non-emulsified conditioning agents). The deposition consistency is maximized when the lipid hardness value of the conditioning component is greater than about 0.02 kg. The quantification of the conditioning component deposited on the skin or hair can be measured using a variety of standard analytical techniques well known to the chemistry of ordinary skill in the art. Such methods include for example the removal of an area of the skin or hair with a suitable solvent followed by analysis by chromatography (i.e., gas chromatography, liquid chromatography, supercritical fluid chromatography, etc.), IR spectroscopy, UVA / IS spectroscopy, mass spectrometry, etc. Direct measurements can be made on the skin or hair by techniques such as IR spectroscopy, UV / VIS spectroscopy, opacity measurements, fluorescence spectroscopy, ESCA spectroscopy, and the like. In a typical method for measuring deposition, an article of the present invention is moistened with water and squeezed and stirred to generate a foam. The article is then carved for about 15 seconds on a site, from about 25 cm2 to 300 cm2, preferably 50 cm2 to 100 cm2, on the skin or head which has been demarcated using a suitable indelible marker. The site is then rinsed for approximately 10 seconds and then allowed to dry for about 10 minutes. The site is then either extracted and the extracts analyzed, or analyzed directly using any techniques such as those described above.
EXAMPLES The following examples further describe and demonstrate embodiments within the scope of the present invention. In the following examples, all ingredients are listed at an active level. The examples are given only for purposes of illustration and are not construed as limitations of the present invention, since many variations thereof are possible without departing from the spirit and scope of the invention. The ingredients are identified by chemical name or CTFA, and all the weights are in percentages of assets.
EXAMPLES 1-5 A. The substrate A multi-layer substrate, as described in Figures 1, 3 A, and 3B, is prepared as described herein. This substrate can be replaced with any nonwoven, for example Veratec 104-102 or Chicopee C5763.
B. The surfactant phase In a suitable container, the following ingredients are mixed at room temperature. Once the polyquatemium has been dispersed, the mixture is heated to 65 ° C.
While the above mixture is being heated to 65 ° C the following ingredients are added to the mixture.
Once the above ingredients are thoroughly mixed, cooling of the mixture starts at 45 ° C. In a separate container the following is added: Once the Slider Plus has dissolved, this mixture is added to the first mixing vessel and cooled to room temperature. Once cooled, apply 1.5 g of this solution to a non-woven substrate and then dry.
C- Conditioner phase: In a suitable container, the following ingredients are mixed at room temperature and heated to 70 ° C during mixing. 1 Available as Abil WE-09 from Goldschmit 2 Available as Lonza Chemical TGMS PoIyAldo 3 Available as Lonza Chemical 10-2P PoIyAldo * SEFA stands for sucrose esters of fatty acids. Cool to room temperature while mixing. Then add 0.17 g of this phase to the substrate which already contains the surfactants of the surfactant phase. The resulting cleaning article is used by moistening with water and is useful for cleaning skin or hair and for depositing conditioning agents on the skin or hair in a consistent manner. The resulting lipid hardness values and deposition consistencies are as follows: In alternative manufacturing processes, the foaming surfactants, the conditioning component, and the optional ingredients separately or simultaneously are added onto or impregnated in (i) either or both layers before combining the layers in a laminate, or (ii) after the layers are combined in a laminate. The method of adding on or impregnating the surfactant and / or the conditioning component to the substrate is achieved by spraying, printing, splashing, dipping or coating. Similarly, the foaming surfactant and the conditioning emulsion can be added to the substrate in any order. Non-limiting examples of the process sequences include (i) first adding surfactant to the second layer, then bonding the substrate, then treating with the conditioning component; (I) first combining the surfactant with the conditioning component and then treating the second layer, then joining the two layers; (Ii) before joining the two layers, treat the second layer with the surfactant first and the second conditioning component, then join the two layers. In alternative embodiments, other substrates such as nonwoven substrates, hydroentangled substrates, natural sponges, synthetic sponges, or polymeric network screens are replaced by the substrate present.
D.- Fragrance phase Approximately 66.5% of beta cyclodextrin, approximately 22% water and approximately 1.5% perfume are added at a total rate of 450 grams / minute to a twin screw extruder without an exit die. The mixer speed is approximately 400 RPM and the pallet configuration is selected to provide specific mechanical feed to the mixer that is larger than 1 horsepower per 0.4535 kg per minute. In a suitable container, the beta cyclodextrin complex is added to PEG 4600 (65c) cast at a ratio of 25% complex to 75% PEG 4600. The resulting mixture is milled with a techmar mill for 2.5 theoretical phases. The mixture is then pumped into suitable storage containers.
The resulting mixture is then added to the dried substrate at a rate of 0.3 grams per sheet. 1 Cerastar Corp. 2 Givaudan Roure EXAMPLES 6-9 A product for personal cleansing and conditioning is prepared as follows: Ingredients Percent by weight Phase A Example 6 Example 7 Example 8 Example Water CS100 CS100 CS100 CS100 Glycerin 10.00 10.00 10.00 10.00 Lau roamfod 4.00 4.00 - - sodium acetate and sodium tridecetsulfate Lauroamphoacetate - - 2.40 2.40 sodium Lauroilsarcosinate 4.00 4.00 - - sodium Ammonium Laureth Sulfate - - 4.20 4.20 Ammonium lauryl sulphate - - 1.40 1.40 Polyquaternium-10 0.25 0.25 0.25 0.25 Disodium EDTA 0.10 0.10 0.10 0.10 Phase B Acid cotton 3.00 3.00 3.00 3.00 fatty acid sucrose ester Petrolat 1.50 Cetildimethicone 2.00 Phase C Butylene glycol 2.00 2.00 2.00 2.00 DMDM Hidantoina (and m).
Yodopropinyl carbamate Phase D Water 5,500 5,500 5,500 5,500 PEG 4600 75.00 75.00 75.00 75.00 Beta cyclodextrin 1 16,625 16,625 16,625 16,625 Selina PG Mod 12 2.975 - 2.875 2.000 Menthol 2,875 - 0.875 1 Cerestar Corp. 2 Givaudan Roure Non-water-soluble substrate A non-woven substrate, with hydro-openings having a basis weight of about 5087 g / m2 comprising 50% rayon and 50% polyester of about 15.24 cm by 19.30 cm and a thickness of about 508 microns.
In a suitable vessel, the ingredients of phase A are mixed at room temperature to form a dispersion and heated with stirring at 65 ° C. The ingredients of phase B are mixed in a suitable container separately and heated to 65 ° C. Once the temperatures are the same, the ingredients of phase B are mixed in the container containing the ingredients of phase A and then cooled to 45 ° C. The ingredients of phase C are then mixed together in a separate vessel at room temperature. Then, the mixture of phase C is added to the vessel containing the combination of phases A and B at room temperature. 1.5 grams of the resulting solution are sprinkled on each substrate. Alternatively, the substrate can be immersed in the resulting solution. The treated substrate is then dried in a constant weight oven. Alternatively, the treated substrate is dried in a convection oven at 45 ° C at constant weight. The ingredients of phase D are prepared in the following manner. Approximately 66.5% beta cyclodextrin, approximately 22% water and approximately 1.5% perfume are added at a total rate of approximately 450 grams / minute to a twin screw extruder without die. The mixer speed is approximately 400 RPM and the pallet configuration is selected to provide specific mechanical feed to the mixer that is larger than 1 horsepower per 0.4535 kg per minute.
In a suitable vessel, the beta cyclodextrin complex is added to PEG 4600 (65c) cast at a ratio of 25% complex to 75% PEG 4600. The resulting mixture is ground with a techmar mill for 2.5 theoretical phases. The mixture is then pumped into suitable storage containers. The resulting mixture is then added to the dried substrate at a rate of 0.3 grams per sheet. The resulting cleaning composition is used by moistening with water and is useful for cleansing the skin or hair and for depositing the conditioning agents on the skin or hair. In alternate manufacturing processes, the foaming surfactants, conditioning agents and optional ingredients may be separately or simultaneously added onto or impregnated into the water-insoluble substrate by spraying, laser printing, splashing, dipping or coating. . In alternate embodiments, other substrates such as non-woven substrates, hydroentangled substrates, natural sponges, synthetic sponges or polymeric mesh screens.
EXAMPLES 10-14 Phase A. Surfactant phase In a suitable container, the following ingredients are mixed at room temperature. Once the polyquaternium has been dispersed, the mixture is heated to 65 ° C.
While the above mixture is being heated to 65 ° C the following ingredients are added to the mixture.
Once the above ingredients are thoroughly mixed, cooling of the mixture starts at 45 ° C. In a separate container the following is added: Once the Slider Plus has dissolved, this mixture is added to the first mixing vessel and cooled to room temperature. Once cooled, apply 1.5 g of this solution to a non-woven substrate and then dry.
Phase B. - Conditioning emulsion: In a suitable container, the following ingredients are mixed at room temperature and heated to 70 ° C during mixing. 1 Available as Abil WE-09 from Goldschmit * SEFA stands for sucrose esters of fatty acids. Once the mixture reaches 70 ° C, stop the heating and slowly add the following ingredients while continuing the mixture: Cool to room temperature while mixing. Then add 0.17 g of this phase to the substrate which already contains the surfactants of the surfactant phase. 1 Cerestar Corp. 2 Givaudan Roure Approximately 66.5% of beta-cyclodextrin, approximately 22% water and approximately 1.5% perfume are added at a total rate of 450 grams / minute to a twin screw extruder without an exit die. The mixer speed is approximately 400 RPM and the pallet configuration is selected to provide specific mechanical feed to the mixer that is larger than 1 horsepower per 0.4535 kg per minute.
In a suitable vessel, the beta cyclodextrin complex is added to PEG 4600 (65c) cast at a ratio of 25% complex to 75% PEG 4600. The resulting mixture is ground with a techmar mill for 2.5 theoretical phases. The mixture is then pumped into suitable storage containers. The resulting mixture is then added to the dried substrate at a rate of 0.3 grams per sheet. The resulting cleaning composition is used by moistening it with water and is useful for cleaning the skin or hair and for depositing the conditioning emulsions on the skin or hair. In alternate manufacturing processes, the foaming surfactants, conditioning emulsions, and optional ingredients are added separately or simultaneously over or impregnated into the water-insoluble substrate by spraying, printing, splashing, dipping or coating. In alternate embodiments, other substrates, such as woven substrates, hydroentangled substrates, natural sponges, synthetic sponges, or polymeric net meshes are substituted by the present substrate.

Claims (2)

  1. NOVELTY OF THE INVENTION CLAIMS 1. - A disposable and personal disposable conditioner and cleaning product, which deposits rinsing materials of the skin or hair, and which has desirable properties of fragrance supply, and which is characterized in that it comprises: (A) a substrate not soluble in water, (B) at least one foaming agent surfactant added on or impregnated in said substrate, and (C) from 0.015% to 15% by weight of said water-insoluble substrate, a complex of release of fragrance added on or impregnated on said substrate, said fragrance release complex comprising (i) from 10% to about 90% by weight of the complex, of a porous fragrance carrier, and (ii) from 1% to about 90 % by weight of the complex, of a fragrance impregnated within said carrier, further characterized in that said product is substantially dry before use.
  2. 2. A product according to claim 1, further characterized in that said foam-forming surfactant comprises from 0.5% to 12.5% by weight of said non-water-soluble substrate, and in which the fragrance-to-carrier ratio of porous fragrance It is on a scale of 5: 1 to 1: 10. 3. - A product according to claim 1 or claim 2, further characterized in that said fragrance carrier comprises carriers that is selected from the group consisting of cyclodextrin, preferably alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, or mixtures and derivatives thereof. the same; amorphous silicas; precipitated silicas; fumed silicas; colloidal silicas; silicas spheroids; aluminosilicates, preferably zeolite, alumina or mixtures thereof; calcium silicates; porous starches; agglomerated starches; polymethacrylate copolymers; and mixtures thereof. 4. A product according to any of claims 1 to 3, further characterized in that said fragrance is selected from the group consisting of perfume ingredients, cooling ingredients, and mixtures thereof. 5. A product according to any of claims 1 to 4, further characterized in that at least a portion of the fragrance is selected from the group consisting of: highly volatile perfume components having a boiling point up to 250 ° C, moderately volatile perfume components having a boiling point of from 250 ° C to 350 ° C; and mixtures thereof. 6. A product according to any of claims 1 to 5 further comprising 0.1% to 10% by weight of the substrate, of a pure fragrance. 1. - A product according to any of claims 1 to 6, further characterized in that the fragrance release complex is encapsulated with a coating material that is selected from the group consisting of paraffin waxes; microcrystalline waxes; animal waxes; vegetable waxes; saturated fatty acids and fatty alcohols; fatty esters; cellulose esters; polyalkylene glycol, preferably polyethylene glycols, polypropylene glycols, mixed polyalkylene glycols, and mixed polyalkylene glycol copolymers; polyvinyl alcohol; and mixtures thereof, and further characterized in that the coating material is present in an amount in the range of 2% to 50% of the fragrance release complex. 8. A product according to claim 7, further characterized in that said fragrance carrier is cyclodextrin, and in which the coating material is polyethylene glycol, preferably having a molecular weight of from 4,400 to 400,000. 9. A product according to any of claims 1 to 8 further comprising from 3% to 99% by weight of the water-insoluble substrate, of a conditioning component added on or impregnated in said substrate, said conditioning component comprises materials that are selects from the group consisting of water soluble conditioning agents, oil soluble conditioning agents, conditioning emulsions, lipid hardening materials, and mixtures thereof. 10. - A product according to any of claims 1 to 9, further characterized in that said foaming surfactant is selected from the group consisting of anionic lathering surfactants, nonionic lathering surfactants, lathering surfactants. amphoteric foam formation, and mixtures thereof. 1 - A product according to any of claims 1 to 10, further characterized in that said water-insoluble substrate is selected from the group consisting of non-woven substrates, woven substrates, hydroentangled substrates, natural sponges, synthetic sponges, polymeric net meshes , films formed, and mixtures thereof. 12. A product according to any of claims 9 to 11, further characterized in that said oil-soluble conditioning agent and said lipid hardening material are selected from the group consisting of fatty acids, fatty acid esters, fatty alcohols, alcohols ethoxylates, polyol polyesters, glycerin monoesters, glycerin polyesters, sebaceous and epidermal hydrocarbons, lanolin, mineral oil, silicone oil, silicone gum, vegetable oil, vegetable oil adduct, petrolatum, nonionic polymers, hydrogenated vegetable oils, nonionic polymers, natural waxes, synthetic waxes, polefinic glycols, polyolefin monoester, polyolefin polyesters, cholesterols, cholesterol esters, and mixtures thereof; and wherein said water-soluble conditioning agent is selected from the group consisting of glycerin, glycerol, propylene glycols, polypropylene glycols, polyethylene glycols, ethylhexanediol, hexylene glycols, other aliphatic alcohols, panthenol, urea, cationic polymers, polyols, glycolic acid, lactic acid and mixtures thereof. same. 13. A product according to any of claims 9 to 11, further characterized in that said conditioning emulsion comprises: (A) an internal phase comprising a water-soluble conditioning agent selected from one or more water-soluble agents so that the solubility parameter heavy arithmetic medium of said water-soluble conditioning agent is larger than 10.5, and (B) an external phase comprising an oil-soluble conditioning agent selected from one or more oil-soluble agents such that the heavy arithmetic mean solubility parameter of said Oil-soluble conditioning agent is larger than 10.5. 14. A product according to claim 13 further comprising from 0% to 20% by weight of the conditioning emulsion of an emulsifier capable of forming an emulsion of said internal and external phases, further characterized in that said emulsifier is selected from one or more emulsifiers so that the heavy arithmetic mean HBL value is from 1 to 7. 15. A product according to any of claims 9 to 14, further characterized in that said conditioning component has a larger surface to saturation ratio. that or equal to 1.25 at any point on the surface of the substrate. 16. A product according to any of claims 9 to 15, further characterized in that said conditioning component has a lipid hardness value of greater than 0.02 kg. 17. A product according to any of claims 9 to 16, further characterized in that said water-insoluble substrate comprises at least two sheets of fibers each in turn having different textures. 18. A product according to claim 17, further characterized in that said water-insoluble substrate comprises at least a portion that is extensible in wet and at least a second portion that is less extensible in wet than said first portion. 19. An article according to claim 17 or claim 18, further characterized in that said water-insoluble substrate comprises: (A) a first layer with openings, the first layer is extensible wet in the plane of the first layer when the first layer is moistened; and (B) a second layer that is less wet extensible when wetted than the first layer, in which select portions of said first layer are attached to said second layer in a manner that is sufficient to inhibit wet extension of said layer. first layer in the plane of said first layer. 20. - A product according to any of claims 1 to 19, further characterized in that said cleaning product additionally comprises a safe and effective amount of one or more active ingredients selected from the group consisting of anti-acne active, anti-wrinkle and anti-wrinkle active ingredients. skin aging, nonsteroidal anti-inflammatory active agents, topical anesthetics, artificial tanning agents and accelerators, antimicrobial and anti-fungal agents, sunscreen active agents, anti-oxidants and mixtures thereof. 21. A method for manufacturing a disposable, single-use conditioner and personal care product, which deposits materials that are rinsed from the skin or hair and which has desirable fragrance supply properties, which method is characterized by comprising the steps of adding on or impregnating in a separate or simultaneously on a water-insoluble substrate (A) at least one foaming surfactant added on or impregnated in said substrate, and (B) from 0.015% to 15%. % by weight of the non-water soluble substrate, of a fragrance release complex added on or impregnated in said substrate, said fragrance release complex comprises: (i) from 10% to 90% by weight of the complex, a porous fragrance carrier , and (ii) from 1% to 90% by weight of the complex, of a fragrance impregnated in said carrier, further characterized in that said product is substantially dry before use. 22. - A method for manufacturing a product according to claim 21, further characterized in that said fragrance release complex is encapsulated with a coating material that is selected from the group consisting of paraffin waxes, microcrystalline waxes, animal waxes, waxes vegetable, saturated fatty acids and fatty alcohols, fatty esters, cellulose esters, polyalkylene glycol, polyvinyl alcohol, and mixtures thereof and further characterized in that the coating material is present in an amount in the range of 2% to 50% of the complex of fragrance release. 23. A method for manufacturing a product according to claim 21 or claim 22, comprising the additional step of adding on or impregnating in, separately or simultaneously in a water-insoluble substrate from 0.1% to 10% in weight of the substrate, of a pure fragrance.
MXPA/A/2000/004009A 1997-10-24 2000-04-24 Cleansing and conditioning article for skin or hair having improved fragrance delivery MXPA00004009A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/957,174 1997-10-24

Publications (1)

Publication Number Publication Date
MXPA00004009A true MXPA00004009A (en) 2001-05-07

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