RU2451064C2 - Cleaning bar soap - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: cleaning soap composition for enhancing deposition of hydrophobic active substances contains: soap, wax having melting point from about 50°C to about 75°C, sunflower oil and myristyl myristate. In one version, the wax is beeswax. The invention also relates to a method of producing cleaning soap. The method of producing cleaning soap involves heating wax, having melting point from 50°C to 75°C, until it melts and forming a solution of wax melt, adding sunflower oil, myristyl myristate and one material selected from propylene glycol and a hydrophobic agent which provides a beneficial effect into the wax melt while simultaneously heating, stirring to obtain a homogeneous solution, cooling the solution, adding the homogeneous solution into the soap component during extrusion, and extruding to obtain cleaning bar soap.

EFFECT: cleaning soap composition facilitates deposition of hydrophobic material into skin and has a beneficial effect on skin.

18 cl, 3 tbl, 4 ex

Description

BACKGROUND OF THE INVENTION

In the commercial products, various aesthetics of the bar soap were used, for example, furrowed, marbled, spotted and multi-colored cleansing soaps. There is a striped or marbled soap on the market, such as, for example, IRISH SPRING® bar soap from Colgate-Palmolive Co., COAST® soap from Procter & Gamble, SKIN SO SOFT® from Avon, DOVE NUTRIUM® from Unilever and other specialized products, including Kappus "Lavendel" (a German product imported into the USA) and Apothary Stone Washed Cleansing Soap from Yardley, London.

Although there are many varieties of bar soap available on the market, the delivery of beneficial agents to the skin has been difficult for ordinary soaps because the hydrophobic agent that has the beneficial effect interacts with the hydrophobic areas of the surfactant of the soap chips. In addition, this conventional bar soap, which is made without the use of co-extrusion technology, typically uses color schemes to produce the desired visual effect, and is only done for visual aesthetics. Therefore, there is a need for cleaning soap formulations that achieve close visual aesthetic effects, while providing many benefits, such as the softness of the soap, enhanced deposition of hydrophobic active substances on the skin, leaving the skin feeling smooth, and improving the massage mechanism when taking a shower.

The essence of the invention

The invention is based in part on the discovery that a combination of hydrophobic ingredients containing wax, sunflower oil and myristyl myristate in a cleansing soap can provide improved deposition of hydrophobic agents having a beneficial effect on the skin.

In a first illustrative embodiment, the invention relates to a composition for a lump cleansing soap, comprising:

a) soap and

b) a wax having a melting point of from about 50 ° C to about 75 ° C, sunflower oil and myristyl myristate.

In a second illustrative embodiment, the invention includes a method for producing a cleaning soap containing a wax mixture, comprising:

a) heating the wax having a melting point of from about 50 ° C to about 75 ° C, before melting and forming a wax melt;

b) introducing sunflower oil, myristyl myristate and, optionally, at least one material selected from propylene glycol and a hydrophobic agent having a beneficial effect into the wax melt while heating;

c) mixing to obtain a homogeneous solution;

d) cooling the solution;

e) introducing a homogeneous solution into the soap component during extrusion;

f) extrusion to obtain a lump cleansing soap.

In one embodiment, the wax is beeswax.

DETAILED DESCRIPTION OF THE INVENTION

Unless otherwise indicated, all percentages and amounts expressed here and everywhere in the description should be understood as weight percent. Also, the term “about”, when used in reference to a range of values, should be understood to refer to any value of the range boundary, or both values of the range boundary. Everywhere, the boundaries of the range are used as an abbreviation for describing, without exception, all values within the range. Any value within the range can be selected as the limit of the range.

As used here, the term "cleaning lump soap" will mean a lump soap for cleaning and personal care use containing a cleaning soap material.

As used here, the term "beeswax" will include white or yellow to brown wax produced by bees to build honeycombs, commercial wax obtained by processing and refining raw wax produced by bees, and synthetic beeswax. Examples of beeswax that can be used include, without limitation, beeswaxes available from Strahl & Pitsch, such as S&P 422, 424 or 426, or the synthetic version of S&P 772.

The present invention relates to a cleaning bar soap containing a hydrophilic component, soap chips and a mixture of hydrophobic ingredients, including two or more of beeswax, sunflower oil and myristyl myristate, and optionally including other beneficial agents that can provide several advantages, such as for example, providing visual aesthetics, smoothness, softness of soap and improved deposition of hydrophobic active substances on the skin.

In one illustrative embodiment, the invention relates to a composition for a cleansing soap, comprising:

a) a hydrophilic soap component and

b) a wax having a melting point of from about 50 ° C to about 75 ° C, sunflower oil and myristyl myristate.

Soap component

The cleansing soap of the present invention includes a soap component. In some embodiments, the soap component is a hydrophilic soap chip (eg, “base component”). Reference is made to US patents 6,383,999 (Coyle et al.) And 6,248,703 (Finucane et al.), Each of which discloses the soap components of a bar of cleaning soap. The term “soap” or “soap shavings” is used here in its generally accepted sense, i.e. alkali metal salts or alkanolammonium salts of aliphatic alkane or alkene monocarboxylic acids. Sodium, potassium, mono-, di- and triethanolammonium cations or combinations thereof are suitable for the purposes of this invention. Generally, sodium soaps are used in the compositions of the present invention, but from about 1% to about 25% soaps can be ammonium, potassium, magnesium, calcium soap, or a mixture of these types of soap.

Soap chips suitable for the purposes of the present invention also include, without limitation, the well-known salts of alkali metals and aliphatic (alkanoic or alkene) acids having an alkyl chain with carbon atoms from about 8 to 22, preferably from 10 to 20. They can be described as carboxylates of alkali metals and acrylic hydrocarbons containing from about 12 to about 22 carbon atoms. Any other surfactant may also be present in the soap shavings, which includes, but is not limited to, sulfate, sulfonate, alpha olefin sulfonates, isethionates, such as SCI, taurates, sulfosuccinates, phosphates, glycinates, amphoteric surfactants such as betaines, sulfobetaines, etc. .p., and nonionic surfactants such as alkanolamide, alkyl polyglycosides, and generally all surfactants referred to in US Pat. No. 5,139,781 (Colgate), column 5, line 35, column 11, line 46.

In one illustrative embodiment, the cleansing soap of the present invention contains at least about 70 wt.% Active soap compounds.

In an alternative illustrative embodiment, the hydrophilic soap chips in the composition of the present invention mainly consists of anionic surfactants, nonionic surfactants, amphoteric surfactants, cationic surfactants, and mixtures thereof.

A mixture of hydrophobic ingredients

One embodiment further comprises a hydrophobic mixture of ingredients in a cleansing soap, which provides several advantages. The hydrophobic mixture includes wax, sunflower oil and myristyl myristate, which has a positive effect on the substrate to be cleaned, such as skin. In some embodiments, the hydrophobic mixture further comprises one or more hydrophobic beneficial agents, propylene glycol and chrome greens. A mixture of hydrophobic components can be introduced uniformly into soap chips.

In one embodiment, a combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) is present in bulk soap in an amount of from about 1% to about 5% by weight.

In one embodiment, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) contains beeswax in an amount of from about 25 to about 37 wt.%. In another embodiment, the amount is from about 28 to about 34 wt.%.

In one embodiment, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) contains sunflower oil in an amount of from about 7% to about 47% by weight.

In one embodiment, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) contains myristyl myristate in an amount of about 15% to about 24% by weight.

In some embodiments, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) also includes a hydrophobic agent that has a beneficial effect. If present, a hydrophobic agent having a beneficial effect may be present in an amount of from about 0.001 to about 10% by weight. Any desired hydrophobic agent having a beneficial effect may be included in the mixture. The mixture helps in the deposition of a hydrophobic agent that has a beneficial effect on the skin.

In some embodiments, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) further includes water miscible organic solvents. Miscible with water, the organic solvent may be one or more polyhydric alcohol. Typical polyols include, but are not limited to, propylene glycol and / or polyethylene glycol.

In one embodiment, the combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) contains the following ingredients: beeswax in an amount of from about 28% to about 34 wt.%; sunflower oil in an amount of from about 7% to about 47% by weight; myristyl myristate in an amount of from about 15% to about 24% by weight, an optional hydrophobic agent having a beneficial effect, and optionally propylene glycol.

In another embodiment, in a combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture), wax and sunflower oil are in a ratio of from about 1: 1 to about 1: 6.

Myristyl myristate in a combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) allows the mixture to rinse / wash at the usual speed, like soap. This allows a bar of soap to remain smooth. Without myristyl myristate in the mixture, the mixture becomes stiff and the soap becomes bumpy after abrasion.

The combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) can be used in any type of bar soap, which includes synthetic detergents and combination soap.

Other ingredients

Optional ingredients may be present in the cleansing soap composition. Non-limiting examples include skin conditioners, moisturizers, perfumes, dyes and pigments, titanium dioxide, chelating agents such as EDTA, sunscreen active ingredients such as butylmethoxy benzoylmethane, polyols such as polyethylene glycols; stabilizers such as alpha hydroxy acids, beta hydroxy acids; antimicrobial materials, such as triclocarban, triclosan, etc., preservatives, such as hidantoins, imidazolines; vitamins such as A, E, K and C; essential oils and their extracts, such as oils and extracts of rosewood and jojoba, solid particles, such as polyethylene balls, jojoba balls, loofah, or oily, and mixtures of any of the above components.

In one embodiment, the cleansing soap comprises perfume in an amount of from about 0.001% to about 2% by weight of the composition.

In one embodiment, the cleaning soap comprises titanium dioxide in an amount of from about 0.01% to 1% by weight.

In one embodiment, the cleansing soap comprises one or more pigments, such as chrome greens, in an amount of from about 0.001% to about 1% by weight.

Preparation of Cleansing Soap

In one embodiment, a cleansing soap containing a combination of wax, sunflower oil and myristyl myristate (hydrophobic mixture) can be obtained by heating the wax until it melts and forms a wax melt; the introduction of other components, including sunflower oil, myristyl myristate and, optionally, propylene glycol, optionally, octyl methoxycinnamate and, optionally, chrome greens, in a wax melt while heating; mixing to obtain a homogeneous solution; cooling the solution to 50-55 ° C; introducing a homogeneous solution into the soap component (hydrophilic component) during extrusion; and extrusion to obtain a lump cleansing soap.

In one embodiment, the cleaning soap of the present invention is prepared using (co) extrusion equipment (e.g., combining two components). We refer to US patents US 3940220 (D'Arcageli and others), US 4096221 (Fischer and others); US 7128901 (Jonas et al.), US 4318878 (Hornig); 6878319 (Browne), each of which describes an extrusion and coextrusion process for producing bar soap. Typically, coextrusion equipment includes two separate pieces of extrusion equipment connected together by a common die, which combines two streams of soap with a different striped or furrowed structure.

The shape of a lump cleansing soap

The bar soap of the present invention obtained by the extrusion method may have various sizes and shapes, for example, an ovoid shape or a rectangular shape with a flat or curved profile as a general appearance. It should be noted that in some embodiments of the invention, the initial surface of the bar of soap can be either smooth, or initially have some texture formed by extrusion and / or pressing of the bar. Additionally, the hydrophobic components of the soap may vary, giving different wear characteristics and visual effects. When used, a smooth piece will exhibit corresponding protrusions, and non-smooth pieces will be able to enhance texture. Compositions for soaps that are washed off unevenly create a hilly surface that massages the skin when washing and cleansing. Cleansing soap can be washed off evenly or unevenly. Cleansing soap can be marbled or grooved. Also, soap can be extruded through a shaped nozzle to obtain the desired shape, for example a star.

In other embodiments, the implementation of the bar soap is one of a single-phase soap, two-phase soap, grooved soap or marble-like soap. In some embodiments, the furrow or marbled imitation is due to the addition of a wax mixture. In another embodiment, in a two-phase soap, the soap is in one phase and the other phase contains a wax mixture.

In one embodiment, the cleansing soap may enhance the deposition of hydrophobic active substances on the skin.

Examples

Representative embodiments of the present invention will be illustrated by the following examples, which are included to illustrate, but not to limit the scope of the present invention.

In examples and elsewhere in the description of the invention, chemical symbols and terms have their usual and familiar meanings. Temperatures are given in degrees Celsius unless otherwise indicated. The quantities of components are given in weight percent based on the described standard; if no other standard is described, the full weight of the composition is implied. Various names of chemical components include those listed in the CTFA International Cosmetic Ingredient Dictionary (Cosmetics, Toiletry and Fragrance Association, Inc., 7 ed. 1997).

In the examples below, octyl methoxycinnamate is used as a hydrophobic agent having a beneficial effect.

Example 1

A composition is being prepared for a cleaning soap, including a hydrophilic component containing 1) soap chips 96.7%; 2) titanium oxide 0.55%; 3) perfume 1.65% and 1.1% hydrophobic component containing i) beeswax; ii) sunflower oil; iii) chrome green; with a ratio of beeswax: sunflower oil is approximately 1: 1. The formulation is detailed in table 1.

Example 2

A composition is being prepared for a cleaning soap, including a hydrophilic component, containing: 1) 96% soap chips; 2) titanium oxide 0.5%; 3) fragrance of 1.5% and 2% hydrophobic component, including i) beeswax; ii) sunflower oil; iii) chrome green; with respect to beeswax: sunflower oil is approximately 15:85. The formulation is detailed in table 1.

Example 3

A composition is being prepared for a cleaning soap, including a hydrophilic component, containing: 1) 96% soap chips; 2) titanium oxide 0.5%; 3) perfume 1.5%; and 2% hydrophobic component, including i) beeswax 0.5%; ii) sunflower oil 1.0%; iii) myristyl myristate 0.45% and propylene glycol 0.05%. The formulation is detailed in table 1.

Example 4A

A composition is being prepared for a cleaning soap, comprising a hydrophilic component containing: 1) soap chips 96.4%; 2) titanium oxide 0.5%; 3) perfume 1.5%; 4) octylmethoxycinnamate 1.6% and 0% hydrophobic (wax mixture) component.

Example 4B

A composition is being prepared for a cleaning soap, comprising a hydrophilic component containing: 1) soap chips 94%; 2) titanium oxide 0.5%; 3) perfume 1.5%; octyl methoxy cinnamate 0% and 4% hydrophobic (wax mixture) component.

All the soap in Examples 4A and 4B was prepared by adding a mixture with beeswax as part of the soap (without furrows) so that the gain was not the result of the concentrated form of the wax mixture found in some places of the bar.

Table 1 Composition of Cleansing Soap Ingredients Example 1 wt.% Example 2 wt.% Example 3 wt.% Example 4A wt.% Example 4B wt.% Hydrophilic component (soap chips) 96.7 96 96 96 94 Titanium dioxide 0.55 0.5 0.5 0.5 0.5 Perfume 1.65 1,5 1,5 1,5 1,5 Octylmethoxycinnamate (OMC) - - - 1,6 - Hydrophobic components, including OMC (beeswax blend) 1,1 2 2 - four Wash texture Uneven abrasion; the soap becomes lumpy; delamination Uneven abrasion; the soap becomes lumpy; delamination Uniform abrasion, smooth piece Single phase - not good Single phase - not good

Table 2 illustrates cleansing soap compositions containing various wax mixtures for Example 4B.

table 2 Various wax mixtures for example 4B Sample W X Y Z Beeswax 27.9 27.9 27.9 33.6 Sunflower oil 46.5 7.0 15.0 43.07 Myristyl myristate 23.27 23 fifteen 21 Propylene glycol 2,33 2,33 2,33 2,33 Octylmethoxycinnamate (OMS) - 39.77 39.77 -

Soap softness test

The softness of the soap was measured in vitro using a collagen swelling test. When a collagen film swells as a result of incubation with soapy solutions, it absorbs water. The detected collagen swelling is in the following order: control soap> Example 4B with mixture Z> Synthetic detergent (bar of DOVE ™ soap). The results show that the softness of the soap improves with the introduction of a hydrophobic wax mixture into the soap shavings.

Skin Deposition Test

Precipitation of the active substances was measured in vitro using Vitro Skin (IMS technologies) as a substrate. A bar of soap was tested according to examples 4A and 4B. The beneficial agent, octyl methoxycinnamate (OMS), deposited on a substrate, was extracted with ethanol, dried and reduced in methanol. The amount of OMS in the extract was measured using HPLC (high performance liquid chromatography) with a methanol / water mixture as mobile phase. The deposition results on Vitro Skin using the cleansing composition according to examples 4A and 4B (X and Y) are shown in table 3.

Table 3 Precipitation of active substances Tests Precipitation on Vitro Skin
(mcg / cm ² ) Example 4A (control) 1.48 Beeswax Example 4B Mixture Y 1.67 (p ≤ 0.05) Beeswax Example 4B Blend X 1.60 (p ≤ 0.05)

Vitro Skin Precipitation Tests for Examples 4B with hydrophobic mixtures X and Y clearly show that beeswax cleansing soap enhances the deposition of hydrophobic active substances, such as OMC, on the skin compared to a cleansing soap that does not contain a hydrophobic mixture with bees wax, which follows from a larger number of active substances determined by analysis for examples with a wax mixture with active ingredients.

Skin sensation tests

A lump cleansing soap was tested for smoothness. Eight test participants were recruited for this study. Participants were asked to wash one forearm with the cleaning soap in Example 4B (with a wax mixture) and the other forearm with a control soap of Example 4A (soap without a wax mixture). Seven out of eight participants preferred a hand washed with a wax mixture, the most frequently indicated reason being smoothness, indicating the benefits of soap with a wax mixture to feel on the skin after application.

Claims (18)

1. Composition for cleaning soaps to enhance the deposition of hydrophobic active substances, containing:
a) soap and
b) a wax having a melting point of from 50 ° C to 75 ° C, sunflower oil and myristyl myristate. 2. The composition according to claim 1, wherein the wax is beeswax. 3. The composition according to claim 2, wherein beeswax and sunflower oil are in a ratio of from 1: 1 to 1: 6. 4. The composition according to claim 2, wherein beeswax, sunflower oil and myristyl myristate are present in combination in an amount of from 1% to 5% of the total weight of the composition for cleansing soap. 5. The composition according to claim 2, wherein beeswax is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of from 25 to 37 wt.%. 6. The composition according to claim 2, wherein beeswax is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of from 28% to 34% by weight. 7. The composition according to claim 2, wherein the sunflower oil is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of from 7% to 47 wt.%. 8. The composition according to claim 2, wherein myristyl myristate is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of 15% to 24% by weight. 9. The composition according to claim 2, additionally containing propylene glycol. 10. The composition according to claim 9, wherein the propylene glycol is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of from 2% to 3% by weight. 11. The composition according to claim 2, additionally containing a hydrophobic agent that has a beneficial effect. 12. The composition according to claim 11, wherein the hydrophobic agent having a beneficial effect is present in a combination of beeswax, sunflower oil and myristyl myristate in an amount of from 0.001% to 10% by weight. 13. The composition according to claim 1, additionally containing titanium oxide in an amount of from 0.1% to 1 wt.%. 14. The composition according to claim 1, additionally containing chrome greens. 15. The composition according to claim 2, wherein the combination of beeswax, sunflower oil and myristyl myristate contains beeswax in an amount of from 28 to 34 wt.%; sunflower oil in an amount of from 7% to 47 wt.%; myristyl myristate in an amount of from 15% to 24 wt.%; propylene glycol in an amount of from 2% to 3% by weight and, optionally, a hydrophobic agent having a beneficial effect. 16. The composition according to claim 1, wherein the bar of soap is a single-phase soap, two-phase soap, grooved soap or marble-like soap. 17. A method of obtaining a cleaning soap, including:
a) heating the wax having a melting point of from 50 ° C to 75 ° C, before melting and the formation of a solution of wax melt;
b) introducing sunflower oil, myristyl myristate and, optionally, at least one material selected from propylene glycol and a hydrophobic agent having a beneficial effect into the wax melt while heating;
c) mixing to obtain a homogeneous solution;
d) cooling the solution;
e) introducing a homogeneous solution into the soap component during extrusion and
f) extrusion to obtain a lump cleansing soap. 18. The method according to 17, where the wax is beeswax.