Cosmetic composition

Abstract: A cosmetic emulsion suitable for topical application to the lips comprises in addition to oil and water, an emulsifier system comprising: i) as a first emulsifier, a phospholipid, and ii) a second emulsifier having a melting point of from -20°C to 80°C. Preferred emulsions are lipsticks and lip gloss product which can additionally comprise wax.

Description: Field of the Invention The invention relates to a cosmetic emulsion composition, particularly to an emulsion which is adapted to be applied to human skin. The cosmetic emulsion is particularly useful for depositing thereon a protective and/or therapeutic and/or coloured film, and can be used in a variety of product forms, particularly cosmetic product forms, including lipstick, blusher, eyeliner, mascara, and lip balms or lip glosses, but is especially suitable for lip products. The invention is accordingly particularly concerned with an improved emulsion lipstick having an enhanced in use feel, moisturisation, protection, and reparative properties. Background and Prior Art In conventional cosmetic product manufacture in general, but especially in the manufacture of lipsticks, fats and/or oils, together with pigments and/or lakes, and other non-aqueous ingredients, are usually added to a wax base which is melted to enable the ingredients to be thoroughly mixed and is then cast into moulds which, after cooling, provide the shaped product. In for example commercially available lipsticks, water is not usually incorporated into the lipstick formulation, and therefore, the lipstick when applied to the lips does not necessarily possess the smooth, soft attributes associated with other skin treatment products, such as skin creams, particularly those intended for moisturising the lips, or other parts of the skin. It is accordingly desirable to provide for some users a lipstick that has more of the moisturising attributes of skin products, such as those referred to above, than conventional water-free lipsticks. It has been proposed in JP-A-61/83110 (Konuki) to incorporate water into a lipstick to achieve in use a fat/oil coating containing water on the lip surface, to provide, so it is stated, healthy, beautiful lips. Moreover, the product is said to have a soft and good feeling in use. To achieve this, dispersing agents such as cholesterol, phytosterol, phospholipids and/or saponins are employed. Also, anionic surfactants, cationic surfactants, nonionic surfactants or amphoteric surfactants may be used so that water or a solution of water-soluble substances in water can be more homogenously and stably dispersed in this type of product. Our attempts to repeat the teaching of JP-A-61/83110 have resulted in lipsticks which, although possessing some moisturising capacity in view of the small amount of water present, still do not meet the requirements of the more discerning user, in that the products are too soft and/or do not glide easily over the lip surface during application and/or leave an imperfect film or undesirable after feel on the lip surface following application. Furthermore, it has been found that products according to the teaching of JP-A-61/83110 (see for example formulation 3) have been found to have undesirable storage characteristics. In particular, in accelerated storage tests conducted at 50°C (to simulate the effects of longer term storage tests conducted at lower temperatures) it has been found that formulations according to JP-A-61/83110 have a tendency to display "sweating" i.e. oil in the formulations leaches out to the surface of the lipstick within a very short time (i.e. 1 day or less). It is thought that this could well be due to the fact that a large proportion (around 73%) of the ingredients of the formulations of JP-A-61/83110 are liquid at room temperature. It is accordingly with the avoidance of these disadvantages, particularly with improving moisturisation of the lips and delivery thereto of skin care active ingredients that this invention is concerned. Summary of the Invention We have now discovered that by employing a special mixture of emulsifiers, a superior water-in-oil lipstick can be obtained which possesses none of the negative attributes of the lip products made according to the teaching of JP-A-61/83110. Definition of the Invention A water-in-oil cosmetic emulsion suitable for use as a stick formulation which comprises: i) from 30 to 97% by weight of oil; ii) from 1 to 25% by weight of wax; iii) from 1 to 20% by weight of water; iv) from 0.2 to 10 % by weight of a phospholipid; and v) from 0.2 to 10% by weight of a glycerol derivative having a melting point of from -20 to 80°C. Disclosure of the Invention The invention is concerned with an improved cosmetic emulsion, particularly a lipstick, which comprises a very special emulsifier system that imparts to the emulsion a consumer-perceivable improved in-use benefits. The function of the special emulsifier system is not only to provide these in-use benefits, but also to aid the delivery to the skin of the product, particularly the lips, of skin care active ingredients, as hereinafter disclosed, which can function to provide moisturisation, emollience and other improvements. According to a particularly preferred embodiment of the invention, formulations according to the invention should comprise no more than 68% by weight of the formulation of components which are liquid at room temperature, preferably not more than 65% by weight of components which are liquid at room temperature, most preferably no more than 60% by weight of components which are liquid at room temperature. The emulsifier system The emulsifier system comprises, as a first emulsifier, a phospholipid, which contributes to the stability and pleasing appearance of the emulsion. Examples of three classes of phospholipids are phosphoglycerides, lysophosphoglycerides and the important but smaller group of sphingomyelins. It is also possible to employ a mixture of two or more of these phospholipids, which together would then comprise the first emulsifier. Examples of phosphoglycerides include: phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl serine, phosphatidyl inositol, diphosphatidyl glycerol ammonium phosphatides (e.g. Chocothin YN (Trade Mark) of general structure lyso and phospholipids from egg containing more saturate fatty acids (e.g. Ovathins 120-200 (Trade Mark)) or synthetic analogues with saturated fatty acids from C10 and C20. mono and/or dialkyl and mono and di-alkenyl phosphates or mixtures of the same e.g. dicetyl and dioleyl phosphates and oleth-n-phosphates (where n=3 to 50). sphingomyelins consisting of single fatty acyl chain conjugated via an amide linkage to the nitrogen of sphingosine which is again linked to phosphoryl choline or other bases. ceramides in which the phosphoryl base head group of sphingomyelins is absent. cerebrosides and gangliosides which contain polysaccharide head groups in place of the phosphoryl base groups of sphingomyelins. plasmogens in which the 1' position is occupied by an ether linked alk-l-enyl chain. cardiolipin in which two molecules of diacyl glycerol phosphatide are linked by a molecule of glycerol and mixtures thereof. The most preferred phosphoglyceride is that known as lecithin, particularly soyabean lecithin, which comprises a mixture of some of the above examples of specific phosphoglycerides. Examples of lysophosphoglycerides includes: lysophosphatidyl choline, lysophosphatidyl ethanolamine, lysophosphatidyl serine, lysophosphatidyl inositol, and mixtures thereof The amount of phospholipid normally present in the cosmetic emulsion of the invention is from 0.2 to 10%, preferably from 0.5 to 2% by weight of the cosmetic emulsion. The emulsifier system also comprises, in addition to the phospholipid, a second emulsifier having a melting point of from -20°C to 80°C, preferably -10 to 60°C, more preferably from -5 to 50°C. It is also possible to employ a mixture of two or more of these second emulsifiers, which together would then comprise the second emulsifier. The second emulsifier comprises derivatives of glycerol, all of which have a melting point in the range -20°C to 80°C, including: i) monoacyl (mainly 1-substituted) glycerol, such as glyceryl monoalkanoates, in which the alkanoate group has from 2 to 20 carbon atoms, with or without one or more hydroxyl groups, and is branched or unbranched, specific examples of which are: glyceryl caprylate glyceryl caprate glyceryl laurate glyceryl myristate glyceryl palmitate glyceryl stearate glyceryl isostearate or glyceryl monoalkenoates, in which the alkenoate group has from 3 to 20 carbon atoms, with or without one or more hydroxyl groups, and is branched or unbranched, and has from 1 to 4 double bonds, specific examples of which are: glyceryl oleate glyceryl linoleate glyceryl ricinoleate. ii) diacyl (1,2- or 1,3- di substituted) glycerol, such as glyceryl dialkanoates, in which the alkanoate groups each have from 2 to 20 carbon atoms, with or without one or more hydroxyl groups, and each are branched or unbranched, specific examples of which are: glyceryl diacetate, glyceryl dibutanoate, glyceryl dilaurate, glyceryl dicaprate. or glyceryl dialkenoates, in which the alkenoate groups each have from 3 to 20 carbon atoms, with or without one or more hydroxyl groups, and each are branched or unbranched, and have from 1 to 4 double bonds, specific examples of which are: glyceryl dioleate glyceryl dilinoleate. iii) polyglyceryl esters, in which up to 5 glycerol residues are linearly linked with one to two acyl groups each having from 2 to 20 carbon atoms, with or without one or more hydroxyl groups, are each branched or unbranched, saturated or unsaturated, specific examples of which are polyglyceryl ricinoleate and polyglycerol-3-monooleate. other preferred glycerol derivatives include: glycerol ether derivatives of the above mono and diacyl types, for example CH 2 OH. CHOH. CH 2 OX. Examples include where X = CH 3 (CH 2 ) 17 (batyl alcohol), and where X = CH 3 (CH 2 ) 15 CH=CH (selachyl alcohol). mixed acyl, ether derived glycerols, including the neutral plasmogens which are structurally 1'-alk-1-enyl, 2'3' diacyl glycerols. polyglycerol esters, including polyglyceryl polyricinoleate and fatty esters of blown soya bean oil (Homodan PT-trademark). polyhydethers and esters of saturated and unsaturated alcohols and fatty acids respectively, particularly with ethylene, propylene, butylene glycols and polyethylene glycols. betaines of general form R-N(Me) 2 CH 2 COOH. Particularly preferred examples of the second emulsifiers are: melting point glyceryl caprate: 40°C, glyceryl laurate: 51°C, glyceryl myristate: 61°C, glyceryl palmitate: 69°C, glyceryl stearate: 75°C, glyceryl oleate: 35°C, glyceryl linoleate: 12°C, glyceryl isostearate: 5°C, glyceryl dilinoleate: -3°C, glyceryl dicaprate: 44°C. The melting points quoted above are applicable to the most stable, highest melting forms in each case. The second emulsifier can comprise one or more pure glycerides, but it is usually more convenient to employ glycerides derived from natural oils such as vegetable or seed oils, examples of which are sunflower seed oil, soyabean oil, palm kernel oil and palm oil. Particularly preferred are monoglycerides of sunflower seed oil and of palm oil, and mono-and di-glycerides of soyabean oil. Further examples of the second emulsifier include esters of fatty alcohols with a hydroxy acid, such as cetyl recinoleate, glyceryl citrate, cetyl citrate and cetyl lactate (having a melting point of 24°C). The amount of the second emulsifier normally present in the cosmetic emulsion of the invention is from 0.2 to 10%, more preferably 0.5 to 10%, most preferably from 0.5 to 5% by weight of the cosmetic emulsion. It is apparent that cosmetic emulsions containing less than 0.2% by weight of either the first or the second emulsifier can be unstable and lack the desirable pleasing appearance attributable to the presence of a higher level of either of these emulsifiers. It has been found that optimal qualities in a formulation for application to the lips are achieved when the formulation contains at least about 0.5% by weight of each emulsifier, or more than about 1% in total of the combined emulsifiers. The cosmetic emulsion contains less than about 10% in total of either emulsifier. In many of the preferred formulations according to the invention, the HLB value of the emulsifier system is between 4 and 8, more preferably 4 and 6. The oil The cosmetic emulsion of the invention also comprises an oily ingredient, hereinafter referred to as an "oil" which together with water and the emulsifier system, forms a water-in-oil or oil-in-water emulsion. A chosen oil will normally be liquid at room temperature (i.e. 20°C), and can comprise a single oil or a mixture of two or more oils. Example of suitable oils include: caprylic triglycerides capric triglycerides isostearic triglycerides adipic triglycerides propylene glycol myristyl ether acetate lanolin oil polybutene isopropyl palmitate isopropyl myristate diethyl sebacate diisopropyl adipate hexadecyl stearate cetyl oleate oleyl alcohol hexadecyl alcohol wheatgerm oil hydrogenated vegetable oils petrolatum modified lanolins branched-chain hydrocarbons, alcohols and esters castor oil corn oil cotton seed oil olive oil palm kernal oil rapeseed oil safflower seed oil jojoba oil evening primrose oil avocado oil mineral oil volatile and non-volatile silicone oils The amount of the oil normally present in the cosmetic emulsion of the invention is from 30 to 97%, preferably 30 to 90% by weight of the cosmetic emulsion. Water The cosmetic emulsion of the invention also comprises water which forms the basis of the aqueous phase of the emulsion and provides a solvent for any water-soluble ingredients present in the cosmetic emulsion. The amount of water present in the cosmetic emulsion of the invention is from 1 to 20%, the preferred amount depending on the product form of the cosmetic emulsion. Wax The cosmetic emulsion of the invention comprises one or more waxy ingredients, hereinafter referred to as a "wax". Examples of waxes include: candelilla wax ozokerite wax carnauba wax beeswax spermaceti lanolin cetyl alcohol stearyl alcohol high melting point parafinic hydrocarbons. The amount of wax present in the cosmetic emulsion of the invention is from 1 to 25% and, preferably from 5 to 20% by weight of the cosmetic emulsion. Skin care active ingredients The cosmetic emulsion of the invention can optionally also comprise skin care active ingredients which can improve the quality of skin, particularly dry or damaged skin especially the lips, or which can possess a therapeutic or pharmaceutical benefit. By way of example, the following skin care active ingredients can be employed, in the amounts stated, in lip treatment emulsions of the invention, especially in lipsticks. % w/w zinc oxide 1 to 2 β -glycyrrhetic acid 0.1 to 1 camomile oil 0.1 to 1 ginko biloba extract 0.1 to 1 pyroglutamic acid, salts or esters 0.5 to 5 sodium hyaluronate 0.1 to 5 For the treatment of spots, pimples and acne comedones, additional therapeutically or pharmaceutically active ingredients can be employed. Examples are: % w/w 2-hydroxyoctanoic acid 0.5 to 5 sulphur 1 to 10 salicylic acid 1 to 3 carboxymethyl cysteine 0.1 to 5 The amount of skin care active ingredients when present in the cosmetic emulsion of the invention will normally be from 0.0001 to 10% by weight of the cosmetic emulsion. In general terms it can be stated that the amount of any skin care active ingredient can be that which is conveniently employed in products intended for topical application to human skin. Other ingredients The cosmetic emulsion of the invention can optionally also comprise other ingredients as conventionally employed in lipsticks or other lipcare products. Examples of other ingredients include perfumes, antioxidants, colorants such as staining dyes and pigments, humectant, germicides, sunscreens, lipid materials, and vitamins. Particularly preferred pigments, when present, include calcium, barium and aluminium lakes, iron oxides, titanium dioxide, and mica. Particularly preferred humectant include glycerol, sorbitol and other polyols. Particularly preferred germicides include Triclosan. Particularly preferred sunscreens include octyl methoxycinnamate and butyl methoxydibenzoylmethane. Particularly preferred lipid materials include ceramides and liposomes. Particularly preferred vitamins include vitamin A, C, D and E. Product form When used as a lip formulation (i.e. a pigmented lipstick formulation, or a lip balm or gloss) the cosmetic emulsion of the invention can take the form of a solid stick, which can be applied to the lips with a suitable applicator. The emulsion is a water-in-oil emulsion, the amount of each phase present being governed by the form of the product itself. A preferred embodiment of the invention is a water-in-oil emulsion lipstick comprising: i from 30 to 97%, most preferably from 70 to 80%, by weight of oil ii. from 1 to 25%, most preferably from 12 to 20%, by weight of wax iii. from 1 to 20%, most preferably from 1 to 10%, by weight of water iv. a sufficient amount of an emulsifier system comprising: a. from 0.2 to 10%, most preferably 0.2 to 4%, by weight of a phospholipid, and b. from 0.2 to 10%, most preferably from 0.2 to 4%, by weight of a glyceryl monoalkenoate, in which the alkenoate group has from 3 to 20 carbon atoms; and v. a sufficient amount of pigment. Use of the Emulsion The cosmetic emulsion of the invention is ideally suited for use as a stick formulation in treating the lips, especially for applying to the lips a permanent or semi-permanent colour, ideally with a gloss or lustre finish. The emulsion can also be used in treating the lips with a skin care agent for protection against exposure to adverse weather, including the wind and the rain or exposure to excessive doses of sunlight. The cosmetic emulsion in the form of a stick, can accordingly be applied to the lips in the traditional manner using a convenient holder or applicator to provide a decorative and/or protective film thereto. The cosmetic emulsion according to the invention is also suitable to act as the base material for a variety of make up formulations, including mascara, eyeliner and blusher. Examples The invention is further illustrated by the following examples. Example 1 A cosmetic emulsion lipstick in accordance with the invention contained the following ingredients: Ingredient % w/w A. Oily Phase Oil caprylic/capric triglyceride 5.8 propylene glycol myristyl ether acetate 6.0 lanolin oil 2.5 polybutene 0.8 caprylic/capric/isostearic/adipic triglyceride 7.0 isopropyl palmitate 11.6 Wax candelilla wax 6.6 ozokerite wax 2.5 carnauba wax 0.4 beeswax 4.1 lanolin 7.0 Emulsifier system phospholipid, namely soyabean lecithin 1.0 glyceride, namely Hymono 7804 3.5 B. Aqueous phase glycerol 5.0 water 5.0 C. Pigments dispersed in castor oil titanium dioxide 4.7 colourants 7.0 castor oil 19.5 The lipstick having the above formulation was manufactured as follows: 1. The combined wax, oil and emulsifier which comprise the oily phase (A) were heated and stirred in a sealed vessel to a temperature of 90°C, until the mass has melted. 2. The melt so obtained was then cooled to 75-80°C and stirred under vacuum to remove air. 3. The aqueous phase comprising water and water-soluble ingredients (B) was heated to a temperature of 75-80°C and then slowly added, with mixing, to the molten oily phase (A) and the mixture homogenised for from 5 to 10 minutes. 4. Pigments and fragrance dispersed in castor oil (C) were finally added and the water-in-oil emulsion so formed was further deaerated prior to cooling. 5. The deaerated emulsion was finally poured into moulds and cooled to form lipsticks. Examples 2 to 12 Examples 2 to 12 illustrate further cosmetic emulsion lipsticks according to the invention. In each example the emulsifier was varied, while the remaining ingredients remained unchanged. The phospholipid emulsifier employed in each case was as follows: Example No. Phospholipid % w/w 2 Soya lecithin 1 3 Soya lecithin 1 4 Soya lecithin 1 5 Soya lecithin 1 6 Soya lecithin 1 7 Soya lecithin 0.5 8 Soya lecithin 2 9 Soya lecithin 1 10 Soya lecithin 1 11 Lyso-soya lecithin 1 12 Phosphatidyl choline-enriched soya lecithin 1 The glyceride emulsifier employed in each case was as follows: Example No. Glyceride % w/w 2 Sunflower oil monoglyceride 3.5 3 Glyceryl isostearate 3.5 4 Glyceryl caprate 3.5 5 Sunflower oil monoglyceride 2.5 6 Sunflower oil monoglyceride 5 7 Sunflower oil monoglyceride 3.5 8 Sunflower oil monoglyceride 3.5 9 Soyabean oil mono/diglyceride 3.5 10 Polyglyceryl ricinoleate 3.5 11 Sunflower oil monoglyceride 3.5 12 Sunflower oil monoglyceride 3.5 Example 13 A cosmetic emulsion lip gloss in accordance with the invention contained the following ingredients: A) Oily phase % w//w Oil polybutene 34 lanolin oil 20 preservative 1 PPG-5-lanolin wax 13 Wax lanolin wax 13 Emulsifier system soya lecithin 1 sunflower oil monoglycerides 3.5 B) Aqueous phase glycerol 5 water 5 C) Pigments dispersed in lanolin oil (as above) titanium dioxide 3 colourants 1.5 Examples 14 & 15 Examples 14 & 15 illustrate further cosmetic emulsion lip gloss products according to the invention. In each case, the formulation was similar to that of Example 13 except that the aqueous phase or the emulsifier system was varied as follows: In Example 14, the aqueous phase formed 20% w/w of the formulation (1:1 glycerol:water) with all other ingredients, except the emulsifier system being reduced proportionately. In example 15, the emulsifier was 1.0% soya lecithin and 3.5% distilled monoglyceride (>90%) based on palm oil. Example 16 This example illustrates a further cosmetic emulsion lipstick according to the invention. The formulation and processing were identical to Example 1 except that the aqueous phase was varied as follows:- In Example 16, the aqueous phase included 2.5% by weight, in terms of the finished product, of a lecithin liposome ingredient based on dispersed and included sodium hyaluronate. The liposome ingredient contained 0.1% by weight sodium hyaluronate and 10% by weight lecithin and had a maximum particle size of 100nm. Examples 17-19 Cosmetic emulsion lipsticks/lipbalm formulations in accordance with the invention contained the following ingredients, and were prepared according to the method of example 1. Example 17 Ingredient Parts by weight of the composition Squalene 3.2 Vegetable fatty acids 12.4 Assorted oils 47.1 Glycerol tripalmitate 7.0 Cholesterol/esters 2.0 Mica 0.5 Sunflower oil monoglycerides 3.0 Soya lecithin 1.0 Antioxidants 0.6 Caprylic/capric/isostearic/Adipic triglycerides 9.0 H 2 O 9.0 Glycerol 5.0 Example 18 - Vegetable oil based lipstick formulation Ingredient Parts by weight of the composition Tristearin 6.4 Tripalmitin 3.3 Beeswax 3.9 Trilarin 4.9 Caprylic/capric triglyceride 5.9 Caprylic/capric/isostearic/Adipic triglycerides 8.8 Sunflower oil 19.6 Vit. E linoleate 0.5 BHA 0.1 Soya lecithin 1.0 Sunflower oil monoglycerides 5.1 Mica UF 1.0 Castor oil/natural pigment 25.8 Water 8.8 Glycerol 4.9 Example 19 - Lipbalm formulation A. Oily Phase Parts by weight of the composition Oil Caprylic/capric triglyceride 5.8 Propylene glycol myristyl ether acetate 6.0 Lanolin oil 2.5 Caprylic/capric/isostearic/adipic triglyceride 9.6 Isopropyl palmitate 11.6 Wax Candelilla Wax 11.4 Ozokerite Wax 5.2 Carnauba Wax 0.8 Beeswax 7.1 Lanolin 5.0 Emulsifier system Soya lecithin 1.0 Sunflower oil monoglyceride 3.5 B. Aqueous Phase Glycerol 5.0 Water 3.2 C. Pigments dispersed in Castor Oil Colourant 0.1 Castor oil 21.6 D. Moisturiser Sodium pyrrolidone carboxylic acid 0.6 Example 20 Crayon Lipstick % w/w Beeswax 2.0 Candelilla Wax 5.0 Ozokenite 8.0 Carnauba Wax 2.5 Lanolin 5.0 Isopropyl myristate 10.0 Oleyl alcohol 16.0 Mineral oil 65/75 5.0 Preservative 0.1 Antioxidant 0.1 Barium Lake 5.0 Castor oil 20.8 Perfume 1.0 Sunflower Oil Monoglyceride 3.5 Soya lecithin 1.0 Water 3.0 Glycerol 5.0 Titanium Dioxide/Mica 5.0 Example 21 Lip Balm Formulations % w/w Hydrocarbon Wax 15.0 Petroleum jelly 69.6 Camphor 0.6 Perfume 0.3 Soya Lecithin 1.0 Sunflower Oil Monoglyceride 3.5 Glycerol 5.0 Sodium PCA 1.0 Water 4.0

Claims: A water-in-oil cosmetic emulsion suitable for use as a stick formulation which comprises: i) from 30 to 97% by weight of oil; ii) from 1 to 25% by weight of wax; iii) from 1 to 20% by weight of water; iv) from 0.2 to 10 % by weight of a phospholipid; and v) from 0.2 to 10% by weight of a glycerol derivative having a melting point of from -20 to 80°C. A cosmetic emulsion according to claim 1 wherein the glycerol derivative has a melting point of from -15 to 60°C. A cosmetic emulsion according to claim 1 or 2 wherein the phospholipid is selected from phosphoglycerides, lysophosphoglycerides, sphingomyelins and mixtures thereof. A cosmetic emulsion according to claim 3 wherein the phosphoglyceride is selected from phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl serine, phosphatidyl inositol, diphosphatidyl glycerol and mixtures thereof. A cosmetic emulsion according to claim 3 wherein the phosphoglyceride is a lecithin. A cosmetic emulsion according to claim 3 wherein the lysophosphoglyceride is selected from lysophosphatidyl choline, lysophosphatidyl ethanolamide, lysophosphatidyl serine, lysophosphatidyl inositol and mixtures thereof. A cosmetic emulsion according to any one of the preceding claims wherein the glycerol derivative is selected from glyceryl monoalkanoates in which the alkanoate group has from 2 to 20 carbon atoms, glyceryl monoalkenoates in which the alkenoate group has from 3 to 20 carbon atoms, and mixtures thereof. A cosmetic emulsion according to any one of the preceding claims 1 to 6 wherein the glycerol derivative is a diglyceride selected from glyceryl dialkanoates in which the alkanoate groups each have from 2 to 20 carbon atoms, glyceryl dialkenoates in which the alkenoate groups each have from 3 to 20 carbon atoms, and mixtures thereof. A cosmetic emulsion according to any of the preceding claims which is in the form of a water-in-oil emulsion lipstick. A cosmetic emulsion according to claim 9 which further comprises a sufficient amount of pigment. A cosmetic emulsion according to any one of the preceding claims wherein less than 65 % by weight of the components of the cosmetic emulsion are liquid at room temperature.

Inventors: DUNPHY PATRICK JOSEPH, MEYERS ALAN JOEL, RIGG RICHARD TYSON, DUNPHY, PATRICK JOSEPH, MEYERS, ALAN JOEL, RIGG, RICHARD TYSON
Applicants: UNILEVER NV, UNILEVER PLC, UNILEVER N.V.
Application year: 1991
Main classification: A61K7
IPC codes: A61K8, B01F17, A61Q19, A61Q1, B01J13