ES2402486T3 - Microcapsules in compositions containing surfactants - Google Patents

Abstract

A composition comprising, from 1% to 99% by weight A composition comprising, from 1% to 99% by weight of surfactant and at least one microparticle of surfactant and at least one microparticle having a diameter of 100 nm to 2 mm, comprising a diameter of 100 nm to 2 mm, said microparticle comprising: i) a core comprising or said microparticle: i) a core comprising a hydrophobic beneficial agent, and, ii) a shell with a hydrophobic beneficial agent, and, ii) a shell comprising comprises a film-forming polymer comprising a water-soluble, hydrophobically modified, n, water-soluble, hydrophobically modified, uncharged, film-forming polymer by which the film remains substantiated or charged, by which the film remains substantially intact in the presence of surfactant partially intact in the presence of surfactant but dissolves when concentration is reduced or dissolves when concentration is reduced surfactant, thereby releasing the bensurfactant, thereby releasing the beneficial agent efficent

Description

Microcapsules in compositions containing surfactants

Field of the Invention

The present invention relates to compositions containing surfactants that include particles comprising a beneficial agent and its use, in particular as laundry detergent products or fabric conditioners. The invention can also be applied to other products containing surfactants such as those suitable for use on skin and hair and on hard surfaces.

Background and prior art

The invention will be described in particular with reference to the beneficial agents that are cationic perfumes, dyes and surfactants.

Perfumes are important and expensive components of laundry detergent compositions and other products containing surfactants. It is important to ensure that perfumes are not lost during the processing or storage of the compositions and that they are deposited on the items and surfaces that are washed. Being volatile, perfumes tend to evaporate from the composition, especially if the composition is subjected to high temperatures. The procedures for the deposition of perfume components and other beneficial agents of the compositions containing surfactants are diverse and, frequently, the perfume is incorporated into a vehicle or other delivery system. Typically, vehicle systems for perfumes are based on encapsulation or entrapment of perfume in a matrix. The perfume can be emulsified easily, but often the deposit on a substrate, such as tissue, skin or hair, is ineffective and problems of poor retention or stability can occur. The preparation of materials by diffusion of the perfume in a vehicle can undergo a complex preparation, prolonged diffusion times, poor retention of the perfume in the matrix and subsequent poor deposit in the substrate.

Perfume encapsulates have been proposed as a means to overcome these problems. EP 332175 (Lion, 1988) discloses a method of producing water insoluble microcapsules comprising the steps of mixing (i) an aqueous dispersion containing capsules with a wall-membrane containing PVOH and a solution containing an electrolyte and (ii) a crosslinking agent comprising an aldehyde. The electrolyte stabilizes the capsules until the membrane wall has been crosslinked. These particles are stable against washing with water and in aqueous dispersion. Also known are controlled release compositions comprising nanospheres encapsulated in a pH sensitive or salt sensitive matrix of WO 03/087287.

Commercially available perfume encapsulates are based on aminoplast materials and can be modified with cationic materials to improve deposition on surfaces such as textiles. These charged capsules encounter difficulties if they are used in an environment that contains anionic surfactants, since the capsules and the surfactant will interact.

Polyvinyl alcohol (PVOH) has been used to form water soluble sachets containing cationic surfactants. WO 2004/031271 discloses modified polyvinyl alcohol (PVOH) sachets that are surrounded by films with a preferred average thickness of from 50 to 500 micrometers. Preferably, the sachets contain from 0.5 ml to 100 ml of a material such as a laundry conditioner.

GB 0803165.0 (filed on Feb. 8, 2008), see also WO 2009/103576, discloses a microcapsule, having a diameter of less than 2 mm, comprising: (a) a beneficial agent (such as perfume) and (b) a polymeric water-soluble film-forming material modified with a hydrophobic group and a first charged bypass group (s). The film: remains substantially intact in the presence of a surfactant and disintegrates when the concentration of the surfactant decreases sufficiently, thereby releasing the beneficial agent.

Dyes are another useful component of many compositions containing surfactants. For example, in casting compositions, dyes can be used as "shading" or "shading" agents. Dyes may be present in hair products to dye hair. As with perfumes, it is difficult to deposit the dyes of the surfactant compositions, since the surfactant has to collaborate in removing the dye from the article or surface being washed. The same is true for many other beneficial agents.

Brief Description of the Invention

The inventors have determined that a hydrophobic modified polymer (in particular modified polyvinyl alcohol (mPVOH)) can be used that does not have the charged shunt group that GB 0803165.0 required to coat microparticles comprising a beneficial agent and that these particles Although they are stable at high concentrations of surfactant, they release the beneficial agent at low concentrations of surfactant. These microparticles are much smaller than the bags of WO 2004/031271 and, at

Unlike the crosslinked, water insoluble particles of EP 332175, it is not necessary to crush them to release their contents.

Accordingly, the first aspect of the invention provides a composition comprising, 1-99% by weight of surfactant and at least one microparticle having a diameter of 100 nm-2 mm, said microparticle comprising:

i) a core comprising a hydrophobic beneficial agent, and,

ii) a cover comprising a film-forming, water-soluble, hydrophobically modified, uncharged polymer, whereby the film remains substantially intact in the presence of surfactant but dissolves when the surfactant concentration decreases, thereby releasing the beneficial agent

Preferably, the microparticles have a diameter of 1-1000 micrometers, more preferably 1-100 micrometers, most preferably 1-50 micrometers.

In accordance with a further aspect of the present invention, there is provided a process for preparing a composition according to the present invention consisting of the steps of:

a) providing an aqueous solution of a film-forming polymer, hydrophobically modified, uncharged having a hydrophobic beneficial agent dispersed therein,

b) forming a layer of the film-forming polymer, hydrophobically modified, not charged, around dispersed hydrophobic beneficial agent, and

c) stabilize said layer with surfactant.

In the context of the present invention, hydrophobic beneficial agents have a ClogP greater than 0.5, preferably greater than 1 and more preferably greater than 2. Without wishing to be bound by any theory, it is believed that when the core and polymer are joined , the hydrophobic moiety causes the polymer to be added to the aquifer interface. In a particularly preferred embodiment, when the temperature of the solution rises above the lower critical solution temperature (LCST) of the polymer, this coating crystallizes, becoming insoluble in water and forming part of the shell. When a suitable surfactant is added, an additional layer is formed by interaction between the surfactant and the hydrophobic moieties of the polymer, thereby creating a shell around the core. When the temperature drops below the LCST, the surfactant-polymer shell remains stable, provided that there is sufficient surfactant present.

The cover is stable in a product containing surfactant. However, after dilution of the product, the cover becomes unstable and the beneficial agent is released.

Preferably, the modified polymer has:

a) a solubility or dispersibility at 20 ° C in water containing a concentration of one or more anionic / non-ionic or cationic surfactants of more than 1 g / l of less than 0.5 g per hour, and,

b) a solubility or dispersibility of more than 0.5 g per hour when the concentration of anionic / non-ionic or cationic surfactant in water is less than 1 g / l.

The invention finds special utility when applied to beneficial agents that are droplets of oily material such as perfumeless oil or even to particles comprising pre-encapsulated perfumes, in particular to urethane or aminoplast encapsulates (including melamine-formaldehyde encapsulates) and polyolefin encapsulates. (including those based on poly (meth) acrylates). Other suitable oily materials include oils that have oil soluble dyes or other beneficial agents dispersed therein. In a preferred embodiment the beneficial agent has a solubility in water (at 20 degrees Celsius) of less than 600 mg / l, preferably less than 200 mg / l.

The invention can also be used to encapsulate charged species, preferably cationic materials, so that they can be added to a solution containing materials of the opposite charge without causing flocculation / instability.

Preferably, the hydrophobic bypass group of the polymer is derived from an original material having a ClogP of more than 0.5.

In accordance with a further aspect of the present invention there is provided a process for the treatment of tissues comprising the step of contacting a composition according to the present invention, in net or diluted form, with tissue. It should be noted that the use of the invention is not limited to laundry applications and that it can be used on other surfaces such as hair or live tissue. The present invention can be used to stabilize and administer hydrophobic beneficial agents from any system containing surfactants.

to be diluted during use. Accordingly, the invention further provides a method for treating a surface comprising the step of contacting a composition according to the present invention, in net or diluted form, with the surface.

Detailed description of the invention

In order that the invention can be better understood, it is described below with particular reference to the preferred features of specific elements of the invention.

Polymer

Polymers suitable for use as all or part of the hydrophobic modified water soluble polymer backbone are preferably selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, cellulose ethers, polyethylene oxide, starch, polyvinylpyrrolidone, polyacrylamide , methyl polyvinyl ether maleic anhydride, polyimaleic anhydride, styrene maleic anhydride, hydroxyethyl cellulose, methyl cellulose, polyethylene glycols, carboxymethyl cellulose, polyacrylic acid salts, alginates, copolymers of acrylamide, guar gum, casein, series of ethyl ethylene cellulose, ethyl ethylene cellulose and hydroxyethylmethylcellulose. Copolymer blends of polymers derived from the aforementioned skeletons are also suitable.

Preferably, the water-soluble polymer has a skeleton comprising hydroxyl side chain groups.

The most preferred skeleton for the water-soluble polymer comprises polyvinyl alcohol (PVAc), preferably with an average molecular weight of from 10 kD to 300 kD, preferably from 20 kD to 200 kD, most preferably from 75 kD to 175 kD.

Polyvinyl alcohol (PVOH) can be supplied in a form comprising a certain amount of polyvinyl acetate (PVAc), in that a quantity of the hydroxyl groups (OH) of the PVOH material are substituted with acetate groups (OCOCH3). Hydrolysis of PVAc is a common way to prepare PVOH. However, carrying out total hydrolysis is expensive and typical materials are hydrolyzed only up to about 99%. Therefore, the PVOH used herein generally comprises some PVAc. The PVOH materials (either before or after hydrophobic modification) may comprise from 0.01 to 40% PVAc, preferably from 0.01 to 20%, more preferably from 0.1 to 15% , most preferably from 0.5 to 10%, based on the% of the total number of monomers that form the polymer. As used herein, the term "PVOH" includes compounds of PVOH with a concentration of PVAc as defined above. In this context, the reference that the material is not charged means that the PVOH does not comprise any charged shunt group as required by GB 0803165.0, but does not have residual PVAc.

Preferably, the modified polymer has an average degree of hydrolysis in the range of 70 to 99%. Preferably, the modified polymer has a viscosity as a 4% solution at 20 ° C measured in accordance with DIN 53 015 in the range of 1 to 100 mPa.s.

As indicated above, the water soluble polymer is modified to comprise hydrophobic substituents. Preferred hydrophobic derivatization groups include those based on original groups selected from acetals, aldehydes, ketals, esters, fluorinated organic compounds, ethers, alkanes, alkenes and aromatics.

Highly preferred hydrophobic substituents are hydrocarbyl groups of carbon chain length from C4 to C22. These hydrocarbyl groups may be based on alkyls or alkenyls, which may be straight chain, branched or comprise rings; also, or alternatively, they can incorporate aromatic moieties.

More preferably, the hydrocarbyl group has a carbon chain length of from C4 to C20, even more preferably from C4 to C15, most preferably from C4 to C10, for example, from C4 to C8.

Hydrocarbyl chain lengths greater than C22 are not desirable, since the original material from which the derivation group is obtained reacts poorly or does not react at all with the polymeric skeleton. The shorter C4 hydrocarbyl groups provide negligible additional hydrophobicity.

Aldehydes such as butyraldehyde, octylaldehyde, dodecyl aldehyde, 2-ethylhexanal, cyclohexanecarboxydehyde, citral and 4-aminobutyraldehyde dimethyl acetal are especially preferred materials for use to introduce hydrophobic derivatization groups into the water-soluble polymer.

Preferably, the hydrophobic material is present in the polymer in a concentration from 0.1 to 40% by weight, based on the total weight of the polymer, more preferably from 2 to 30%, most preferably from 5 to the 15 %.

Preferably, when the polymer skeleton is based on polyvinyl alcohol, the derivatization material

Hydrophobic is present in a concentration such that the numerical ratio of the hydrophobic groups and the free hydroxyl pairs of the skeleton is from 1: 3 to 1:30, more preferably from 1: 4 to 1:20, most preferably from 1: 7 to 1:15.

The variation in the degree of derivatization of the polymer allows the properties of the shell to be modified so that the shell releases the core materials at a particular surfactant concentration. Thus, covers that are stable in the product containing surfactant but which are unstable at the concentration of surfactant found in a wash water (for example, which become unstable in the main wash of a process of production) can be manufactured laundry or during skin or hair treatment with the product in the presence of water). These systems can help the stability of the beneficial agent during product storage. Alternatively, the covers may be stable in the wash water, but become unstable during rinsing of the surface wash water or the item being treated. Accordingly, particles that release the beneficial agent can be formed during a rinse process, and reduce the tendency of the beneficial agent to be removed by the surfactant. There may be more than one type of particle present in a given product to prevent the interaction of the components, for example, sunscreens, which could otherwise interact.

Other components of the film

It may be advantageous to provide the water soluble film from a material having a partially crosslinked polymeric structure. However, it should be kept under the degree of crosslinking in order to avoid the formation of an insoluble material. It is preferable that the material from which the film is formed is not crosslinked at all.

Particularly suitable crosslinking agents include formaldehyde; polyesters; epoxides, amidoamines, anhydrides, phenols; isocyanates; vinyl esters; urethanes; polyimides; acrylics; bis (methacryloxypropyl) tetramethylsiloxane (styrene, ethyl methacrylates); n-diazopyruvates; phenylboronic acids; cis-platinum; divinylbenzene; polyamides; dialdehydes; triallylcyanurates; N - (- 2-ethanesulfonylethyl) pyridinium halides; tetraalkyl titanates; mixtures of titanates and borates or zirconates; polyvalent ions of Cr, Zr, Ti; dialdehydes, diketones; alcoholic organotitanate, zirconate and borate complexes and copper (II) complexes. For PVOH-based films, the preferred cross-linking agent is a metalloid oxide such as borate, telluride, arsenate and precursors thereof. Other known crosslinkers include vanadyl ion, titanium ion in a valence state greater than three or a permanganate ion (disclosed in US Patent 3,518,242). Alternative crosslinkers are given in the book: Polyvinylalcohol -Properties and applications, chapter 9 by C.A. Finch (John Wiley & Sons, New York, 1973).

The film may incorporate a plasticizer and / or a crystallinity disruptor. It should be understood that the term "plasticizer" and the expression "crystallinity disruptor" are interchangeable, so that the reference to one is an implicit reference to the other.

Water itself is a plasticizer suitable for mPVOH films, but other common plasticizers include: polyhydroxy compounds, e.g. eg, glycerol, trimethylolpropane, diethylene glycol, triethylene glycol, sorbitol, dipropylene glycol, poletylene glycol; starches, p. eg, starch ether, esterified starch, oxidized starch and potato, tapioca and wheat starches; cellulosics / carbohydrates, p. eg, amylopectin, dextrin, carboxymethyl cellulose and pectin. Amines are particularly preferred plasticizers.

Plasticizers suitable for mPVP-based films of one or more of: phosphates, e.g. eg, tris (2-ethylhexyl) phosphate, isopropyldiphenyl phosphate, tributoxyethyl phosphate; polyols, p. eg, glycerol, sorbitol, diethylene glycol diperlargonate, polyethylene glycol di-2-ethylhexanoate, dibutyltartrate; polyol esters, e.g. eg, hydroxyl-containing polycaprolactones, hydroxyl-containing poly-L-lactides; lower phthalates, p. eg, dimethyl phthalate, diethyl phthalate, dibutyl phthalate; and sulfonamides, e.g. eg, toluenesulfonamide, N-ethyl toluenesulfonamide.

Plasticizers suitable for mPEO-based films can be selected from one or more of: phosphates, e.g. eg, tris (2-ethylhexyl) phosphate, isopropyldiphenyl phosphate, tributoxyethyl phosphate; polyols, p. eg, glycerol, sorbitol, diethylene glycol diperlargonate, polyethylene glycol di-2-ethylhexanoate, dibutyltartrate; lower phthalates, p. eg, dimethyl phthalate, diethyl phthalate, dibutyl phthalate; and sulfonamides, e.g. eg, toluenesulfonamide, N-ethyl toluenesulfonamide.

Encapsulating surfactants

Preferably, the surfactant used to form the gel barrier with the film is anionic, although nonionic or cationic surfactants can be used. If the particle is to be used in a laundry detergent, preferably, the surfactant used is anionic or non-ionic. Anionic products are also typically used in hair and / or skin wash compositions. If the particle is to be used in a wash rinse conditioner, then, preferably, the surfactant is cationic or non-ionic. Similarly, cationic surfactants are typically used in hair conditioning products.

Suitable anionic surfactants are: linear alkylbenzenesulfonate (LAS), primary alkyl sulfate (PAS), fatty ester sulfates (LES), secondary alkanesulfonate, α-olephinsulfonate, α-sulfonic fatty acid methyl ester, methyl ester sulfonates (MES). Preferred surfactants are LAS, PAS, LES and mixtures thereof. The

Preferred materials include fatty alcohol sodium sulfate, fatty alcohol ammonium sulfate, alcohol ether ammonium sulfate, fatty ether sodium sulfate, alcohol ether carboxylate and polyoxyethylene nonylphenol ether carboxylate. The most preferred surfactant for casting compositions is LAS.

Suitable non-ionic surfactants include linear and branched ethoxylated alcohols, ethoxylated alkylphenols, fatty acid esters, amine and amide derivatives, alkyl polyglucosides, EO / PO block copolymers, ethoxylated polyols and polyols.

For hair and skin products, preferably, the present surfactant is an anionic surfactant having from 8 to 14 carbons, more preferably from 10 to 12 and most preferably 12 carbons. More preferably, these carbons are present in a single alkyl group. Preferred anionic surfactants for hair and skin products comprise include alkali metal alkyl sulfates, more preferably, alkyl ether sulfates. Particularly preferred cleaning surfactants include sodium lauryl ether sulfate. Typically, the cleaning phase of a hair or skin product (which is different from any conditioning or moisturizing phase) comprises from 27 to 70% by weight of cleaning surfactant, preferably from 35 to 50% by weight of the composition.

In hair and skin conditioning products, the preferred cationic surfactants have the formula N + (R1) (R2) (R3) (R4), wherein R1, R2, R3 and R4 are independently alkyl (C16 to C30) or benzyl . Preferably, one, two or three of R1, R2, R3 and R4 are independently (C16 to C30) alkyl and the other group or groups R1, R2, R3 and R4 are (C1-C6) alkyl or benzyl. Optionally, the alkyl groups may comprise one or more ester (-OCO-or -COO-) and / or ether (-O-) bonds in the alkyl chain. Optionally, the alkyl groups may be substituted with one or more hydroxyl groups. The alkyl groups may be straight or branched chain and, for alkyl groups with 3 or more carbon atoms, cyclic. The alkyl groups may be saturated or may contain one or more carbon-carbon double bonds (eg, oily). Optionally, the alkyl groups are ethoxylated in the alkyl chain with one or more ethyleneoxy groups.

Cationic surfactants suitable for use in conditioning compositions according to the invention include cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetylpyridinium chloride, tetramethylammonium chloride, tetraethylammonium chloride, stearyl dimethylbenzylammonium chloride, coconutrimethylammonium chloride 2- oleamonium and the corresponding hydroxides thereof. Other suitable cationic surfactants include materials having the CTFA designations Quaternium-5, Quaternium-31 and Quaternium-18. Mixtures of any of the above materials may also be suitable.

A surfactant particularly useful for use in conditioners according to the invention is cetyltrimethylammonium chloride, commercially available, for example, as GENAMIN CTAC, from Hoechst Celanese. Another cationic surfactant particularly useful for use in conditioners of the invention is behenyltrimethylammonium chloride, commercially available, for example, as GENAMIN KDMP, from Clariant.

Another example of a class of cationic surfactants suitable for use in the invention, either alone or in admixture with one or more other cationic conditioning surfactants, is amidoamines. The useful herein include stearamidopropyldimethylamine preferred amidoamines document, stearamidopropyldiethylamine, stearamidoethyldiethylamine, stearamidoethyldimethylamine, palmitamidopropyldimethylamine, palmitamidopropyldiethylamine, palmitamidoetildietilamina, palmitamidoethyldimethylamine, behenamidopropyldimethylamine, behenamidopropildietilmina, behenamidoetildietilamina, behenamidoetildimetilamina, arachidamidopropyldimethylamine, araquidamidopropildietilamina, arachidamidoethyldiethylamine, arachidamidoethyldimethylamine, and mixtures thereof.

Particularly preferred amidoamines herein are stearamidopropyldimethylamine, stearamidoethyldiethylamine, and mixtures thereof.

Commercially available amidoamines useful herein include:

stearamidopropyl dimethylamine with trademarks LEXAMINE S-13 available from Inolex (Philadelphia, Pennsylvania, USA) and AMIDOAMINE MSP available from Nikko (Tokyo, Japan), stearamidoethyldiethylamine with trademark AMIDOAMINE S available from Nikko, behenamidopropyldimethylamine with trademark INCROMINE available from Croda (North Humberside, England) and various amidoamines with trademarks of the SCHERCODINE series available from Scher (Clifton, New Jersey, USA).

The concentration of cationic surfactant in hair conditioning products will generally vary from 0.01 to 10%, more preferably from 0.02 to 7.5%, most preferably from 0.05 to 5% by weight. Total cationic surfactant based on the total weight of the composition.

Beneficial agents

Using the present invention, a variety of beneficial agents can be incorporated. Preferred beneficial agents include perfumes, lubricants and any other oily material. Particularly preferred beneficial agents include, but are not limited to, the following:

a) silicone oils, resins, and modifications thereof, such as linear and cyclic polydimethylsiloxanes, aminomodified silicone oils of allyl, aryl and alkylaryl, which preferably have a viscosity greater than 50,000 cst (50 cm2 / s);

b) perfume components, including fragrances and essential oils, perfumery and resins;

c) photoactive materials, including dyes and pigments, including inorganic compounds with hydrophobic modified surface and / or dispersed in an oil or hydrophobic liquid, also including fluorescent agents, for example: 2,5-bis (2-benzoxazolyl) thiophene for use in fabrics (such as cotton, nylon, polycotton or polyester) in laundry products; UV protection agents, such as sunscreens, for example, octylmethoxycinnamate (Parsol MCX), butylmethoxydibenzoylmethane (Parsol 1789) and benzophenone-3 (Uvinul M-40), and ferulic acid; active organic sunscreens, for example octylmethoxycinnamate;

d) antimicrobial agents, for example, 2-hydroxy-4,2,4-trichlorodiphenyl ether; anti-dandruff agents, for example, zinc pyrithione;

e) skin lightening agents, for example, 4-ethylresorcinol

f) ester solvents; for example, isopropyl myristate;

g) lipids and substances of the lipid type, for example, cholesterol; fish and vegetable oils, hydrophobic plant extracts; waxes;

h) hydrocarbons such as paraffins, petrolatum and mineral oil

i) pre-encapsulated materials, p. eg, encapsulated perfume

j) surfactants of the opposite charge to that of encapsulating surfactants.

k) other pharmaceutical compounds, and on the other hand, biologically active, such as biocides and agrochemicals

Among the most preferred beneficial agents are the perfume components. Perfume components include both odorous materials and fragrance precursor materials, encapsulated or not. Among the preferred beneficial agents are also oily materials that are used as vehicles for smaller amounts of oil-soluble beneficial agents, that is, in amounts of less than 50% by weight of the vehicle. These oil-soluble beneficial agents include hydrophobic dyes and other hydrophobic assets such as agrochemicals.

Fragrance precursors can be, for example, a food lipid. Food lipids are oily materials and typically contain structural units with pronounced hydrophobicity. Most lipids are derived from fatty acids. In these "acyl" lipids, fatty acids are predominantly present as esters and include mono-, di-, triacylglycerols, phospholipids, glycolipids, diol lipids, waxes, sterol esters and tocopherols. In their natural state, plant lipids comprise antioxidants to prevent oxidation. Although they can be removed, at least in part, during the isolation of plant oils, some antioxidants may remain. These antioxidants can also be fragrance precursors. In particular, carotenoids and related compounds, including vitamin A, retinol, retinal, retinoic acid and provitamin A, can become fragrant species that include ionones, damasconas and damascenones. Preferred fragrance precursor food lipids include olive oil, palm oil, rapeseed oil, squalene, sunflower seed oil, wheat germ oil, almond oil, coconut oil, grape seed oil, Rapeseed, castor oil, corn oil, cottonseed oil, safflower oil, peanut oil, poppyseed oil, palm kernel oil, rice bran oil, sesame oil, soybean oil, Pumpkin seed oil, jojoba oil and mustard seed oil. Perfume components that are odorous materials are described in more detail below.

Perfumes as beneficial agents:

Typically, the perfume is present in an amount of from 10-85% by total particle weight, preferably from 20 to 75% by total particle weight. Suitably, the perfume has a molecular weight of from 50 to 500.

Useful components of the perfume include both natural and synthetic materials. They include individual compounds and mixtures. Specific examples of these components can be found in the current literature, p. eg, in Fenaroli’s Handbook of Flavor Ingredients, 1975, CRC Press; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; o Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to those skilled in the art of perfuming, flavoring and / or aromatizing consumer products, that is, imparting a smell and / or a taste or taste to a traditionally scented or flavored consumer product, or modifying the smell and / or taste of said consumer product.

In this context, perfume not only means a fully formulated product fragrance, but also

Selected components of that fragrance, particularly those that tend to get lost, such as the so-called ’high notes’.

Poucher (Journal of the Society of Cosmetic Chemists 6 (2): 80 [1955]) defines the high marks. Examples of well-known high notes include citrus oils, linalool, linalyl acetate, lavender, dihydromyrcenol, rose oxide and cis-3-hexanol. Typically, the high notes comprise 15-25% by weight of a perfume composition and in those embodiments of the invention that contain an increased concentration of high notes, it is expected that at least 20% by weight are present within the encapsulation.

Typical perfume components that are advantageous to encapsulate include those that have a relatively low boiling point, preferably those that have a boiling point of less than 300, preferably 100-250 degrees Celsius.

It is also advantageous to encapsulate perfume components that have a low LogP (ie, those that will be distributed in water), preferably with a LogP of less than 3.0. These relatively low boiling and relatively low LogP materials have been called the "late blooming" perfume ingredients and include the following materials:

allyl caproate, amyl acetate, amyl propionate, anisic aldehyde, anisole, benzaldehyde, benzyl acetate, benzyl acetone, benzyl alcohol, benzyl formate, benzyl isovalerate, benzyl propionate, beta gamma hexenol, camphor gum, levo-carvone, d-carvone, cinnamic alcohol, cinnamyl formate, cisjasmona, cis-3-hexenyl acetate, cuminic alcohol, cyclal C, carbinol dimethyl benzyl, dimethylbenzylcarbinol, ethyl acetate, ethyl acetoacetate, ethyl amyl ketone , ethyl benzoate, ethyl butyrate, ethyl hexyl ketone, ethyl phenyl acetate, eucalyptol, eugenol, phenyl acetate, flower acetate (tricyclo decenyl acetate), frutene (tricyclodecyl propionate), geraniol, hexenol, acetate hexenyl, hexyl acetate, hexyl formate, hydrophobic alcohol, hydroxycitronellal, indone, isoamyl alcohol, isomentone, isopulegyl acetate, isoquinolone, ligustral, linalool; linalool oxide, linalyl formate, chin, mentyl acetophenone, methyl amyl ketone, methyl anthranilate, methyl benzoate, methylbenyl acetate, methyl eugenol, methyl heptenone, methyl heptin carbonate, methyl heptyl ketone, methyl hexyl ketone, acetate of methyl phenyl carbinyl, methyl salicylate, methyl-N-methyl anthranilate, nerol, octalactone, octyl alcohol, p-cresol, pcresol methyl ether, p-methoxy acetophenone, p-methyl acetophenone, phenoxy ethanol, phenyl acetaldehyde, acetate of ethyl phenyl, ethyl phenyl alcohol, phenylethyldimethylcarbinol, penyl acetyl, propyl boronate, pulegone, rose oxide, safrole, 4terpinenol, alpha-terpinenol and / or viridine.

It is common for a plurality of perfume components to be present in a formulation. In the encapsulates of the present invention it is envisioned that there are four or more, preferably five or more, more preferably six or more or even seven or more, perfume components different from the list of late blooming perfumes given previously present in the encapsulated perfume .

Another group of perfumes with which the present invention can be applied are the so-called 'aromatherapy' materials. These include many components also used in perfumery, including essential oil components such as clear sage, eucalyptus, geranium, lavender, mace extract, neroli, nutmeg, peppermint, sweet violet leaf and Valerian. By means of the present invention these materials can be transferred to textile articles that will dress or otherwise come into contact with the human body (such as tissue and bedding).

As indicated above, the core of the particles of the present invention may be an encapsulated perfume such as a melamine / urea / formaldehyde encapsulation. The present invention can be used to "improve" leaking capsules by adding an additional layer that is impermeable to perfume. During use in a cleaning procedure, the additional layer (PVOH and surfactant) is removed. The capsules can then release perfume for a period of time and / or, in the case of laundry, when the clothes are dressed and the capsules are crushed.

As will be illustrated below with reference to specific examples, the present invention can be used to encapsulate pre-encapsulated beneficial agents (such as perfumes) that have been provided, in their first encapsulation, with a cationic capsule. It is believed that these cationic capsules are deposited better, for example, on cloth, than unloaded capsules. However, they show negative interactions with anionic surfactants. These unwanted interactions can be reduced by further encapsulating these capsules in accordance with the present invention.

Dyes as beneficial agents

Dyes are a beneficial agent that can be present in particles as an alternative to or in addition to perfumes. Typically, dyes are present in concentrations that make them effective as a shading dye. Preferably, the tint dye is blue or violet. Suitable and preferred tinting dyes are those described in WO05 / 003274, WO06 / 032327, WO 06/032397, EP08167033, WO 06/045375, WO 06/053598 and WO 08/017570. Blends of shading dyes can be used.

Preferred shading dye classes are cationic dyes of thiazolium, cationic dyes of isothiazolium, cationic dyes of azine, cationic dyes of pyridine / pyridazine, acidic dyes of azine, hydrophobic anthraquinone dyes and hydrophobic azo dyes.

The most preferred shading dyes are those selected from: Direct Violet 9; Direct Violet 35; Direct Violet 51; Direct Violet 99; Acid Violet 50; Disperse Violet 28 and Solvent Violet 13. When any other beneficial agent is encapsulated in accordance with the present invention, the dyes may be present as an additional adjunct instead of within the capsule or in the bulk of the product.

Surfactants as beneficial agents

The beneficial agent may be a surfactant itself or may include a surfactant. In laundry products, for example, the beneficial agent may be a cationic surfactant that is prevented from interacting with the anionic surfactant of the bulk of the product by the cover formed around it. For casting products, cationic surfactants of this type are suitable, water-soluble cationic species having at least one alkyl or alkenyl chain. It is preferable that the sum of the length of the alkyl chains is less than

20. Preferred cationic surfactants are quaternary ammonium compounds having aliphatic groups of a single long chain. Cetyltrimethylammonium chloride is particularly preferred.

Other beneficial agents

The beneficial agent may comprise a silicone, preferably as a conditioning agent, especially for products suitable for use in hair and skin products. Alternatively, or in addition, silicone conditioning agents may be present in the bulk of the composition. Particularly preferred silicone conditioning agents are silicone emulsions such as those formed from silicones such as polydiorganosiloxanes, in particular polydimethylsiloxanes having the designation CTFA dimethicone, polydimethyl siloxanes with terminal hydroxyl groups having the designation CTFA dimethiconol, and polydimethyl amino functional siloxanes having the designation CTFA amodimethicone.

Also suitable are silicone emulsions in which certain types of high molecular weight surfactant block copolymers have been mixed with silicone emulsion droplets, as described, for example, in WO03 / 094874. In these materials, silicone emulsion droplets are preferably formed from polydiorganosiloxanes such as those described above. A preferred form of the surfactant block copolymer is in accordance with the following formula:

HO (CH2CH2O) x (CH (CH3) CH2O) and (CH2CH2O) x H

in which the average value of x is 4 or more and the average value of y is 25 or more.

Another preferred form of the surfactant block copolymer is according to the following formula:

(HO (CH2CH2O) a (CH (CH3) CH2O) b) 2-N-CH2-CH2-N ((OCH2CH (CH3)) b (OCH2CH2) to OH) 2

in which the average value of a is 2 or more and the average value of b is 6 or more.

Mixtures of any of the silicone emulsions described above may also be used.

In general, the silicone described above will be present in a composition of the invention in concentrations of from 0.05 to 15%, preferably from 0.5 to 12% in total silicone weight based on the total weight of the composition.

Additional hydrophobic beneficial agents can be provided. Many agrochemicals are hydrophobic and can be potentially dangerous when used. These materials may be present as a solution in an oily material that forms the core of the particles according to the present invention. It is believed that the presence of the surfactant stabilized shell around these cores delays the release of these materials until the composition is diluted, preferably just before use, thereby reducing unwanted exposure.

Specific water-insoluble agrochemical materials, with a solubility of less than or equal to 200 mg / l, include: gamma-cihalotrine, deltamethrin, fluvalinate, fenvalerate, sphevalerate, flucycloxuron, ciflutrin, metaflumizona, chlorentezine, biphentrine, novaluron, alpha- cypermethrin, flufenoxuron, lambdacyhalothrin, acequinocyl, cypermethrin, zeta-cypermethrin, ethalfluralin, teflubenzuron, pyridaben, cyflufenamid, fenbutatin oxide, tefluthrin, chlorfluazuron, acrinathrin, etofenprox, fenpyroximate, hexaflumuron, cyflumetofen, flubendiamide, bistrifluron, dimethomorph, triflumuron, azocyclotin, silthiofam , lufenuron, picolinafen, quinoxyfen, diflufenican, spirodiclofen, benzobicyclon, cinidonetilo, diafenthiuron, sulfur, quinclorac, benfluralin, prothiofos, etoxazole, diflubenzuron, pyraflufen, cycloprothrin, bifenox, chlorethoxyfos, hexythiazox, amitraz, fenazaquin, carbosulfan, famoxadone, chlorfenapyr, cyazofamid , oxyfluorfen, benzofenap, spiromesifene, fluazinam, dinocap, flumicloraco, noviflumuron, permethrin, indoxacarb, propargite, pentoxazone, trifluralin, diflovidazine, meptildinocap, paclobutrazol, quizalofop, pencicuron, butraline, endosulfan, pendimethalin, pyrimydipyriane, pyripropyl oxadipropyl oxadipropyl pyripropyl oxadipropyl oxadipropyl oxadipropyl oxadipropyl pyripropyl oxadipropyl oxadipropyl pyripropyl oxane, pyripropyl oxadilipropyrineal, pyrimatipyrone, pyrimatipyrone, pyrimatipyrone, pyrimatipyrone, pyrimatipyrone, pyrimatipyrone

quintozene, buprofezin, metrafenone, chlorthal, lactofen, oxadiazon, trifloxystrobin, propaquizafop, zoxamide, metamifop, cyhalofop, tolclofos-methyl, diclomezine, naproanilide, bensultap, dicofol, folpet, chlorothalonil, tebufenozide, fluthiacet, milbemectin, fenoxaprop, tolylfluanid, isoxaben, proquinazid, ziram, fluazifop, cyhexatin, chinomethionat, chlorantraniliprole, chlorpyrifos, tridamorf, chromafenozide, fluquinconazole, abamectin, dichlofluanid, dithiopyr, aclonifen, phosalone, pyridate, phoxim, haloxyfop, oryzalin, imibenconazole, flumioxazin, pyriftalid, phenmedipham, fludioxonil, carpropamid, isoxathion, pyraclostrobin, ethion, kresoxim-methyl, metiram, benomyl, bifenazate, mepanipyrim, MCPA-thioethyl, fluoxastrobin, fentrazamide, tebufenpyrad, procymidone, cafenestrol, thiazopyr, phthalide, nitrotalisopropilo, lenacil, flusulfamide, fluopicolide, picoxystrobin, quizalofop-P- tefuryl, beflubutamide, methoxyphenozide, vinclozoline, pyribenzoxime, bromobutide, fenbuconazole, fipronil, bitertanol, mefenacet, clodinafop, diniconazole, triallate, fenthion, mandipropamid, pyrazophos, dimoxystrobin, fenpropimorph, terbufos, azinphos-methyl, boscalid, ethaboxam, esprocarb, simazine, captan, profoxydim, tralcoxidima, isoxaflutole, mancozeb, diclosulam, cyclosulfamuron, terbutylazine, azoxystrobin, imazosulfuron, ipconazole, desmedifam, epoxiconazole, pentiopirad, tifluzamide, acibenzolar, fenamidone, phenoxycarb, carbendazim, flutolanyl, benfuracarb, uniconazole, lindane, propazine, propizamine, trifacetylbenzylthis, trifacetazolidone, trifacetyl trichlorobenzine, trifacetyl trichlorobenzine, trifacetyl trichlorobenzine, trifacetyl trichlorobenzene, trifacetyl trichloroacetic acid , Zinab, triflumizole, flurtamone, thenylchlor, pirimiphos-methyl, phenthoate, flamprop-M, iprodione, halofenozide, mepronil, cyprodinil, bupirimate, benthiavalicarb, prosulfocarb, anilofos, fenarimol, tecloftalam, pirazosulfurona, dichlobenil, difenoconazole, phosmet, thiram, thiobencarb , indanofán, quinalfós, iprovalicarb, hexaconazol, fenitrotiona, butaclor, dimepiperato, alanicarb, espinatoram, fenhexamid, thiophanate, thidiazuron, quinoclamine, carfentrazone, Terbutryn, Thiodicarb, imazalil, benzoate emamectin, disulfoton, nuarimol, diethofencarb, methiocarb, profenofos, benalaxyl, spirotetramat, benzoximate, fenothiocarb, thiabendazole, metconazole, prometryn, pyraclofos, diflumetorim, norflurazon, prochloraz, atrazine, triazophos, flurochloridone, diuron, tebuconazole, bromuconazole, flusilazole, cyclanilide, etofumesate, ethametsulfurone, pretilachlor, phosphaphephene, forate, cycloxidim, isoprotiolane, parathion-methyl, methylenomethyl, flufenacetyl, dimethiazine, diaphthiazine, methylphezine, cyclobenzine, diaphthiazine, methylphenazine, methazine, diaphthiazine, methylphene, cyclobenzine, diaphthiazine, diaphthiazine, diaphthiazine, diaphthiazine, diaphthiazine, methazine, diaphthiazione Linuron, Bensulfuron, Primisulfuron, Sulfometuron, Triadimefon, Isoproturon, Fuberidazole, Triadimenol, Penconazole, Chlorotoluron, Napropamide, Orisaestrobin, Oxpoconazole, Bromoxynil, Ciproconazole, Pyridafention, Dodemorf, Fluometuron, Methtromethyl, Pyrotin, Methylthistrinoethane, Methylthistrinoethane, Methylthistrine, Carbethane, Pyrotin, Methylthistrine, Methylthistrine, Carbethane, Methylthistrine, Carbethane, Pyrotin, Methylthistrine, Carbethane, Pyrotin, Methylthistrine, Carbetol malathion, propiconazole, tea traconazole, mesotrione, prohexadione, maneb, chloransulam, thiacloprid, metaldehyde, pinoxadene and ametrine. It is envisioned that these materials can be formulated as described herein.

Manufacturing procedure (polymer)

The modification of the polymer can be carried out by a variety of known procedures. For example, in the manufacture of modified PVOH, an acid solution of PVOH (preferably formed at a temperature above 80 degrees Celsius) is reacted at about 70 degrees Celsius with an aldehyde / acetal (preferably added dropwise). After the addition of the components, the reaction is allowed to proceed for several hours at PTN. However, suitable polymeric materials are commercially available and include Mowiflew ™ LPFX 416 (from Kuraray).

Particularly preferred embodiments of the present invention are main wash detergent compositions comprising an anionic surfactant. Preferably, the surfactants are present in the composition in a concentration of from 1% to 60% by weight. Suitable anionic surfactants are well known to those skilled in the art and include alkylbenzenesulfonate, primary and secondary alkyl sulfates, in particular C8-C15 alkyl sulfates; alkyl ether sulfates; olefinsulfonates; alkyl xylenesulfonates, dialkylsulfosuccinates; ether carboxylates; isothionates; sarcosinates; sulphonates of fatty acid esters and mixtures thereof. In general, sodium salts are preferred. When included, the composition usually contains from about 1% to about 50%, preferably from 10% by weight to 40% by weight, based on the tissue treatment composition of an anionic surfactant such as linear alkylbenzenesulfonate, alpha- olefinsulfonate, alkylsulfate (fatty alcohol sulfate), alcohol ethoxy sulfate, secondary alkanesulfonate, alpha-sulfo fatty acid methyl ester, alkyl- or alkenyl succinic acid or soap. Preferred surfactants are alkyl ester sulfates and mixtures of alkoxylated alkyl nonionic surfactants with alkyl ester sulphonates or alkyl ester sulfates. Preferred alkyl ether sulfates are C8-C15 alkyl and have 2-10 moles of ethoxylation. Preferred alkyl sulfates are alkylbenzenesulfonates, in particular linear alkylbenzenesulfonates having an alkyl chain length of C8-C15. Typically, the counterion for anionic surfactants is sodium, although other counters such as TEA or ammonium can be used. Suitable anionic surfactant materials are available on the market such as the Clarap Genotol range. In these preferred embodiments the beneficial agent is selected from:

a) perfume per se;

b) encapsulated perfume; Y,

c) cationic surfactant.

In order that the present invention be more and better understood, it will be illustrated below with reference to particular examples.

Measurement of particle size

Two procedures were used to measure particle size.

one.

Images of the particles were taken in solution using an Olympus BX-41 optical microscope equipped with a digital camera. Images were captured using the Olympus Cell P software that allows you to measure particle sizes.

2.

The particles were air dried on a non-absorbent surface and images were taken on a Hitachi TM-1000 desktop scanning electron microscope. The particle size was determined using the length scale added to the image by the associated computer program.

Examples: Example 1: perfume and dye as beneficial agents

1a) Control solution without polymer content: 30 ml demineralized water 500 μl of AKK perfume * + 5 μl of Oil Red EGN (* 15 component perfume model) Perfume, water and Oil Red EGN are mixed using a high speed stirrer for 20 minutes (1200

rpm, Jiffy® stirrer). Then, the temperature is raised to 55 ° C using a water bath and the product is mixed for another 10 minutes. 10 ml of a 20% active solution of linear alkylbenzenesulfonate (LAS) are added. The product is mixed for another 10 minutes at 800 rpm and then allowed to cool to room temperature with stirring for a period of 20 minutes at 800 rpm.

1 b) Solution modified with polymer: 10 ml of Mowiflex LPFX 416 (5% active mPVOH, from Kuraray) 500 pl of AKK perfume * + 5 μl of Oil Red EGN (* 15 component perfume model) 20 ml of demineralized water Perfume, water and Oil Red EGN are mixed using a high speed stirrer for 10 minutes (1200

rpm, Jiffy® stirrer). Mowiflex LPFX 416 is added and stirring is continued for another 10 minutes. Then the temperature rises up to 55 ° C using a water bath and mixing is continued for another 10 minutes. 10 ml of a

20% active solution of linear alkylbenzenesulfonate (LAS) and mixing is continued for another 10 minutes at 800 rpm The product is allowed to cool to room temperature with stirring for 20 minutes at 800 rpm. After 24 hours, the control solution (1 a) had a pronounced red layer of free perfume and dye. The

solution containing Mowiflex (1b) remained homogeneous.

Example 2: perfume and dye as beneficial agents

1 ml of the solution prepared in example (1 b) was dispersed in a 19 ml aliquot of fragrance-free detergent base to form the product (2a). 1 ml of the solution prepared in example (1 b) was also dissolved in 19 ml of demineralized water to form the product (2b).

Both solutions were placed in glass vials, closed and left at room temperature for 24 hours. After this time, both samples were evaluated to determine the presence of perfume in the upper space.

In the case of (2a), no perfume was detected. In (2b), perfume was detected.

Example 3: cationic surfactant as a beneficial agent

(3a) control encapsulation without polymer

1.75 g of Praepagen ™ TQ (Clariant triethanolamine quat diester meth sulfate) was dispersed in 46.5 ml of demined water. at 50 ° C. Then, the solution was cooled to 20 ° C and 0.5 ml of AKK model perfume was added. The solution was then stirred using a high speed stirrer for 10 minutes. After the solution was heated to 60 ° C and stirred for another 10 minutes. Then 1.25 ml of a 20% linear alkylbenzenesulfonate (LAS) solution was added and the solution was stirred for another 10 minutes. The solution was then cooled to 20 ° C and stirred for another 20 minutes.

(3b) with modified PVOH

The same procedure was repeated using 42.75 ml of demined water, 1.75 g of Praepagen TQ, 0.5 ml of AKK model perfume and 3.75 ml of a 5% solution of modified polyvinyl alcohol (Mowiflex ™ LPFX 416 of Kuraray).

In the preparation of the control solution (3a), intense flocculation was observed when the LAS was added, indicating that an insoluble complex had formed between the LAS and the Praepagen TQ, as expected.

However, when the solution (3b) containing the modified PVOH was prepared, no flocculation was observed, indicating that the perfume / Praepagen TQ droplets were protected from the anionic surfactant by the Mowiflex coating.

Example 4: perfume encapsulates as a beneficial agent

As in Example 3, but Praepagen TQ was replaced by cationically modified perfume encapsulates (Coolwear ™ from Firmenich).

At the end, the solution containing the modified PVOH was translucent with clearly dispersed encapsulates visible with optical microscopy. The control solution was opaque with few encapsulates. After 24 hours, the control solution showed both sedimentation and separation at the top, none of which was present in the solution containing the modified PVOH.

As in example 3, the presence of the modified PVOH effectively selects the cationic charge of the anionic surfactant encapsulation, thus making it stable in anion-rich detergent products.

Example 5: dye as a beneficial agent in a variety of products

In these examples the beneficial agent selected was Solvent Violet 13, a hydrophobic dye of cosmetic quality, which is suitable for use as a fabric shading agent. The dye (0.1 g) was mixed with 10 ml of mineral oil (white, light, from Sigma Aldrich, CAS No. 8042-47-5) until completely dissolved.

Product samples comprising encapsulated SV13 were obtained as follows: 500 ul of oil / SV13 was dispersed in 50 ml of demined water. using a Jiffy shaker at 1200 rpm for 10 minutes. After the solution was heated to 50 ° C, 10 ml of 20% LAS solution was added and the stirring speed was reduced to 800 rpm. After 3 minutes, the solution was cooled to 20 ° C with stirring at 800 rpm.

Product samples comprising encapsulated SV13 were obtained as follows: 500 ul of oil / SV13 was dispersed in 32 ml of demined water. using a Jiffy shaker at 1200 rpm for 5 minutes. Then 18 ml of a 5% solution of Mowiflex LPFX416 was added and the solution was stirred for another 5 minutes. After the solution was heated to 50 ° C, 10 ml of 20% LAS solution was added and the stirring speed was reduced to 800 rpm. After 3 minutes, the solution was cooled to 20 ° C with stirring at 800 rpm.

To test whether the dye had been successfully encapsulated or not, 3 ml of each of the solutions were added to 10 ml of a product containing commercially available surfactant. The reflectance spectrum of the solution was then measured by filling a 1 cm PMMA cuvette with the solution, covering three sides with white paper and then placing the exposed face against the opening of a Color i7 spectrophotometer (6 mm aperture plate, with specular exclusion, with UV exclusion). A value of -b * higher indicates that more dye has been released into the product.

Product

b * before the addition b * with SV13 b * with SV13 + Mowiflex

5th

Small-and-Mighty ™ (laundry detergent) 6.94 -10.17 -0.49

5b

Dettol ™ antibacterial surface cleaner -1.69 -7.52 -5.37

5c

Pantene Pro-V ™ Ice Shine Shampoo -0.23 -6.43 -5.19

5 d

Simple ™ refreshing shower gel -0.63 -5.26 -4.33

5e

Boots ™ foam bath -7.19 -10.92 -9.94

5f

Palmolive ™ Aquarium Gel hand soap -2.35 -7.18 -5.89

It can be seen that in all examples 5a-5f the encapsulation of the dye significantly reduced the extent to which the dye colored the bulk of the product.

Claims (14)

1. A composition comprising, from 1% to 99% by weight of surfactant and at least one microparticle having a diameter of 100 nm to 2 mm, said microparticle comprising: i) a core comprising a hydrophobic beneficial agent, and, ii) a cover comprising a film-forming, water-soluble, hydrophobicly modified, uncharged polymer, whereby the film remains substantially intact in the presence of surfactant but dissolves when the concentration of surfactant is reduced, releasing it beneficial agent mode

2.

A composition according to claim 1 wherein the, or each, particle has a diameter of 1-1000 micrometers, preferably 1-100 micrometers, most preferably 1-50 micrometers.

3.

A composition according to any of the preceding claims, wherein the skeleton of the film-forming polymer is selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, cellulose ethers, polyethylene oxide, starch, polyvinylpyrrolidone, polyacrylamide, ether methyl polyvinyl maleic anhydride, polyimaleic anhydride, styrene maleic anhydride, hydroxyethyl cellulose, methyl cellulose, polyethylene glycols, carboxymethyl cellulose, salts of polyacrylic acid, alginates, copolymers of acrylamide, guar gum, casein, series of ethyl ethylene cellulose, ethyl ethylene cellulose, ethyl ethylene cellulose , hydroxyethylmethylcellulose and mixtures thereof.

Four.

A composition according to any of the preceding claims, wherein the hydrophobic modification is obtained by prior reaction of the film-forming polymer with an acetal or aldehyde.

5.

A composition according to any preceding claim, wherein the modified polymer has:

a) a solubility or dispersibility at 20 ° C in water containing a concentration of one or more anionic / non-ionic or cationic surfactants of more than 1 g / l of less than 0.5 g per hour, and, b) a solubility or dispersibility of more than 0.5 g per hour when the concentration of anionic / non-ionic or cationic surfactant in water is less than 1 g / l.

6.

A composition according to any of the preceding claims, wherein the modified polymer is derived from polyvinyl alcohol with a molecular weight of from 10 kD to 300 kD, preferably from 20 kD to 200 kD, most preferably from 75 kD to 175 kD .

7.

A composition according to any of the preceding claims, wherein the modified polymer is derived from polyvinyl alcohol with a hydrolysis range of 60 to 99%.

8.

A composition according to any of the preceding claims, wherein the modified polymer is derived from polyvinyl alcohol and has a viscosity as a solution of 4%, in the range of 1 to 100 mPa.s at 20 ° C measured in accordance with the standard DIN 053 015.

9.

A composition according to any of the preceding claims, wherein the polymer is modified with a hydrophobic bypass group that is derived from an original material having a ClogP of more than 0.5.

10.

A composition according to any of the preceding claims, wherein the original material for the hydrophobic bypass group is selected from the group comprising: butyraldehyde, octylaldehyde, dodecyl aldehyde, 2-ethylhexanal, cyclohexanecarboxyaldehyde, citral, propionaldehyde, (2-methoxyethoxy ) acetaldehyde dimethylacetal and benzaldehyde.

eleven.

A composition according to any of the preceding claims, wherein the surfactant is selected from anionic detersive surfactant and cationic surfactant, which is a softening conditioning active.

12.

A composition according to any of the preceding claims, wherein the beneficial agent comprises a perfume.

13.

A process for the treatment of surfaces comprising the step of contacting a composition according to any of claims 1-12 with tissue, hair or living tissue.

14.

A process for preparing compositions according to claims 1-13 comprising the steps of:

a) providing an aqueous solution of a film-forming polymer, hydrophobically modified, uncharged having a hydrophobic beneficial agent dispersed therein, b) forming a layer of the film-forming polymer, hydrophobically modified, not charged, around dispersed hydrophobic beneficial agent, and c) stabilize said layer with surfactant.