Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Reexamination Certificate
2000-07-17
2002-06-11
Page, Thurman K. (Department: 1615)
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
C424S078030, C424S064000, C424S070700
Reexamination Certificate
active
06402408
ABSTRACT:
The present invention relates to compositions for care of, for treating and for making-up at least one keratinous material, in particular at least one human keratinous material, such as skin, including the scalp, lips, eyelashes and eyebrows, comprising at least one liquid fatty phase gelled with at least one structuring polymer. This invention may be in the form of make-up sticks such as lipsticks and may give a glossy and non-migrating deposit when applied.
Structured liquid fatty phases in cosmetic or dermatological products are known in the art. As used herein, “structured” means gelled and/or rigidified. Structured liquid fatty phases may be found in solid compositions such as deodorants, balms, lip compositions, concealer products and cast foundations. In general, this structuring may be obtained with the aid of waxes or fillers. However, these waxes and fillers have a tendency to make the compositions matte and matte compositions may not be desired. For example, women may desire lip compositions in the form of a tube which deposit glossy films.
As used herein, “liquid fatty phase” means a fatty phase which is liquid at room temperature (25° C.) and at atmospheric pressure (760 mmHg) and which is composed of at least one fatty substance, such as an oil, which is liquid at room temperature. If the liquid fatty phase comprises two or more fatty substances, they should be mutually compatible.
Structured liquid fatty phases may make it possible to control the exudation of the liquid fatty phase from the solid compositions of which they are components. Structuring of the liquid fatty phase may also limit the migration of this phase into wrinkles and fine lines after it has been deposited, for example, on the skin or the lips. A large migration of a liquid fatty phase comprising dyestuffs such as in lip compositions may lead to an unaesthetic effect around the lips which may accentuate the wrinkles and fine lines. Women have cited this migration as a drawback of conventional lip compositions.
The gloss of cosmetic and dermatological compositions may be associated with the nature of the liquid fatty phase. Reduction of the concentration of waxes and fillers in such compositions may increase gloss, but the migration of the liquid fatty phase may increase. In other words, the concentration of waxes and fillers required to prepare cosmetic and dermatological compositions in the form of a stick which have a suitable hardness may limit the gloss of the deposited compositions.
The inventor has found that the observed decrease in gloss of cosmetic and dermatological compositions in the form of a stick which comprise waxes may be associated with the anisotropic crystal structure of the waxes. One aim of the present invention is to provide cosmetic and/or dermatological compositions for the manufacture of wax-free compositions in the form of a stick.
Another subject of the invention is cosmetic and/or dermatological compositions which are useful for the care, make-up and/or treating of at least one keratinous material which may be of suitable hardness to allow preparation of these compositions in the form of a stick, which may be glossy and which may be non-migrating. As used herein, “keratinous material” is meant to comprise hair, lips, skin, scalp and superficial body growths such as eyelashes, eyebrows and nails.
The inventor has found, surprisingly, that the use of specific polymers may make it possible to structure, even, in some embodiments, in the absence of wax, liquid fatty phases in the form of a stick, which may give a glossy and non-migrating film when applied to a keratinous material.
The invention applies not only to make-up products for at least one keratinous material such as lip compositions, lip pencils, foundations which may be cast in the form of a stick or a dish, concealer products, temporary tattoo products, eyeliners which may be in pencil form, mascara tablets, but also to body hygiene products such as deodorant sticks, and to care products and products for treating at least one keratinous material such as sunscreen and after-sun products which may be in stick form. The present invention can be in the form of mascara product, an eyeliner product, a foundation product, a lipstick product, a deodorant product, a make-up product for the body, a make-up-removing product, an eyeshadow product, a face powder product, a concealer product, a treating shampoo product, a hair conditioning product, an antisun product or a care product for the face or the body.
The present invention is also directed to a structured composition comprising at least one liquid fatty phase comprising at least one structuring polymer which comprises a polyamide skeleton comprising at least one end group with at least one chain chosen from alkyl chains comprising at least four carbon atoms and alkenyl chains comprising at least four carbon atoms, bonded to the polyamide skeleton via at least one ester group, the at least one structuring polymer being combined with at least one amphiphilic compound which is liquid at room temperature and has an HLB value of less than 8.
The term “HLB” represents the hydrophilic/lipophilic balance. According to the present invention, one or more amphiphilic compounds that are liquid at room temperature (25° C.) and atmospheric pressure may be used. In one embodiment, the at least one amphiphilic compound has an HLB value ranging from 1 to 7, such as from 1 to 5, further such as from 3 to 5. The purpose of the at least one amphiphilic compound may be to reinforce the structuring properties of the at least one structuring polymer, to facilitate the use of the inventive compositions and to improve the depositability of the inventive compositions, which may be in the form of a stick.
As used herein, “at least one end group” means one or more end groups. As used herein, “polyamide” means at least two repeating amide units.
Due to the at least one chain chosen from alkyl chains and alkenyl chains at the end of the polyamide skeleton, the at least one structuring polymer in the composition of the present invention may have good solubility in oils (i.e. water-immiscible liquid compounds) and thus may give macroscopically homogeneous compositions even with a high content (at least 25%) of the at least one structuring polymer, unlike certain polymers of the prior art that do not contain such alkyl or alkenyl chains at the end of the polyamide skeleton.
The at least one structuring polymer can be chosen from polymers resulting from at least one polycondensation reaction between at least one dicarboxylic acid comprising at least 32 carbon atoms, such as 32 to 44 carbon atoms, with at least one diamine comprising at least 2 carbon atoms, such as from 2 to 36 carbon atoms. The at least one dicarboxylic acid can, for example, be chosen from dimers of at least one fatty acid comprising at least 16 carbon atoms such as oleic acid, linoleic acid and linolenic acid. The at least one diamine can, for example, be chosen from ethylenediamine, hexylenediamine, hexamethylenediamine, phenylenediamine and ethylenetriamine.
The at least one structuring polymer can also be chosen from polymers comprising one or two terminal carboxylic acid groups. The terminal carboxylic acid groups can, for example, be esterified with at least one alcohol chosen from monoalcohols comprising at least 4 carbon atoms. For example, the at least one alcohol can be chosen from monoalcohols comprising from 10 to 36 carbon atoms. In a further example, the monoalcohols can comprise from 12 to 24 carbon atoms, while in yet another example, they can comprise from 16 to 24 carbon atoms.
The composition of the present invention may be in a form chosen from a paste, a solid and a cream. It may be an oil-in-water emulsion, a water-in-oil emulsion, a solid or supple anhydrous gel. The composition can also be in a form chosen from a translucent anhydrous gel and a transparent anhydrous gel. The composition can also be cast as a stick or a dish.
The composition can comprise at least one structuring polymer which has a weight
Finnegan Henderson Farabow Garrett & Dunner LLP
Howard S.
L'Oreal (S.A.)
Page Thurman K.
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