Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2001-03-16
2004-08-10
Harlan, Robert D. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C424S070100, C424S070600, C424S070700, C424S070160, C424S078030
Reexamination Certificate
active
06774175
ABSTRACT:
The present invention relates to compositions comprising (i) at least one anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from a fatty alcohol and a carboxylic acid; and (ii) at least one additional anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from an alkoxylated fatty alcohol and a carboxylic acid, wherein the fatty chain of the alkoxylated fatty alcohol comprises more than 18 carbon atoms.
When formulating compositions in general, and in particular compositions comprising at least two components, one faces the challenges of chemical stability of the at least two components and physical stability of the composition as a whole. The physical stability, for example, may be important to ensure that a composition exhibits homogeneity, which may, for example, permit homogeneous activity, such as, where the composition is to be used on keratinous material, conditioning activity, cleansing activity and oxidizing activity and/or even distribution to the keratinous material. An non-homogeneous composition may lead to variation in activity that may result in problems with safety and/or performance, and/or variation in viscosity that may also result in performance issues.
Thus, there is a need for compositions that are physically stable and may be used in conjunction with treatments for keratinous materials. The inventors have found that the use of at least one anionic associative polymer and at least one additional anionic associative polymer in a composition may provide physical stability to the composition.
In one embodiment, therefore, the invention provides a composition comprising (i) at least one anionic associative polymer comprising at least carboxylic acid group and at least one ester derived from a fatty alcohol and a carboxylic acid; and (ii) at least one additional anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from a carboxylic acid and an alkoxylated fatty alcohol wherein the fatty chain of the alkoxylated fatty alcohol comprises more than 18 carbon atoms. In a further embodiment, the at least one anionic associative polymer and the at least one additional anionic associative polymer are present in a combined amount effective to provide stability to at least one non-solid composition different from the composition comprising the at least one anionic associative polymer and the at least one additional anionic associative polymer. As used herein, “at least one” means one or more and thus includes individual components as well as mixtures/combinations. Accordingly, “at least two” means two or more individual components as well as mixtures/combinations.
The inventive compositions may provide physical stability to at least one non-solid composition. As used herein, “non-solid” refers to compositions that are not in a solid state, such as compositions in a liquid state. A “composition,” as used herein, means a combination of at least two components.
According to the present invention, the method for providing physical stability to at least one non-solid composition comprises including in the at least one non-solid composition at least one stabilizing composition comprising (i) at least one anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from a fatty alcohol and a carboxylic acid; and (ii) at least one additional anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from an alkoxylated fatty alcohol and a carboxylic acid wherein the fatty chain of the alkoxylated fatty alcohol comprises more than 18 carbon atoms. The at least one anionic associative polymer and the at least one additional anionic associative polymer are present in the at least one stabilizing composition in a combined amount effective to provide stability to the at least one non-solid composition.
Further, the invention provides for a method for making up, caring for or treating at least one keratinous material comprising applying to the at least one keratinous material at least one non-solid composition containing, as a stabilizing composition, the combination of (i) at least one anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from a fatty alcohol and a carboxylic acid; and (ii) at least one additional anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from an alkoxylated fatty alcohol and a carboxylic acid, wherein the fatty chain of the alkoxylated fatty alcohol comprises more than 18 carbon atoms. The at least one anionic associative polymer and the at least one additional anionic associative polymer are present in the non-solid composition in a combined amount effective to provide stability to the at least one non-solid composition. The at least one keratinous material may be human keratinous material, such as hair, eyelashes, eyebrows, nails, and skin (including lips, facial skin and body).
Another subject of the present invention is a non-solid composition comprising at least one stabilizing composition which comprises (i) at least one anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from a fatty alcohol and a carboxylic acid; and, (ii) at least one additional anionic associative polymer comprising at least one carboxylic acid group and at least one ester derived from an alkoxylated fatty alcohol and a carboxylic acid, wherein the fatty chain of said alkoxylated fatty alcohol comprises more than 18 carbon atoms. The at least one anionic associative polymer and the at least one additional anionic associative polymer are present in the at least one stabilizing composition in a combined amount effective to provide stability to the at least one non-solid composition.
The non-solid compositions of the invention may be, for example, suitable for application to at least one keratinous material. The inventive non-solid compositions may be useful for making up, for care of and/or for treatment of at least one keratinous material. Non-limiting examples of such non-solid compositions include non-solid compositions for making up keratinous fibers, such as mascara compositions, and compositions for eyebrows; non-solid compositions for making up the skin of the face and/or body, such as lip compositions, eyeliner compositions, eyeshadow compositions, blusher compositions, foundation compositions, and concealer compositions; non-solid compositions for making up, caring for and/or treating the nails, such as nail polish compositions; non-solid compositions for care of and/or treatment of the skin of the face and/or body, such as moisturizing compositions, and compositions comprising medicaments which may be applied topically; non-solid compositions for making up the hair, such as topical hair coloring compositions (e.g., hair mascara) and hair styling compositions (such as gels, mousses, sprays, lacquers, pomades, and glossers); and non-solid compositions for caring for and/or treating hair, such as shampoo compositions, conditioning compositions, hair dyeing compositions, hair bleaching compositions, hair relaxing compositions, and permanent hair waving compositions.
In one embodiment, the non-solid compositions of the invention are physically stable. As used herein, “physical stability” is tested by placing the composition in a controlled environment chamber for 8 weeks at 45° C. In this test, the physical condition of the sample is inspected as it is placed in the chamber. The sample is then inspected again at 24 hours, 3 days, 1 week, 2 weeks, 4 weeks and 8 weeks. At each inspection, the sample is examined for phase separation. A composition is considered to lack physical stability if separation of the phases of a composition is observed by the human eye. Accordingly, a composition is considered “physically stable” if no phase separation is observed at 8 weeks in the above te
Ascione Jean-Marc
De George Michael
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Harlan Robert D.
L'Oreal (S.A.)
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