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Rheology Modifier/Hair Styling Resin

IP.com Disclosure Number: IPCOM000128968D
Publication Date: 2005-Sep-23

Publishing Venue

The IP.com Prior Art Database

Abstract

A rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer exhibits advantageous hair care properties of high viscosity and long-lasting curl retention.

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RD-2881

RHEOLOGY MODIFIER/HAIR STYLING RESIN

Abstract

            A rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer exhibits advantageous hair care properties of high viscosity and long-lasting curl retention.

RHEOLOGY MODIFIER/HAIR STYLING RESIN

            This invention relates to hair care compositions, and, more particularly, to a rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer for use in such compositions.

            J. Shih, in

U.S.

Pat. 5,015,708, described a process for making terpolymers of vinyl pyrrolidone, acrylic acid and lauryl methacrylate monomers by precipitation polymerization in an aliphatic hydrocarbon solvent.

            Frenz, V. in WO 02/32975, April 25, 2002, described absorbent materials made by grafting acrylic acid monomer onto polyvinyl pyrrolidone polymer in water in the presence of a crosslinking agent.  The resultant crosslinked graft copolymer matrix contained 79.9-99.9% of acrylic acid.

            Accordingly, it is an object of this invention to provide a rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer; and a process for making same.

Another object herein is to provide a crosslinked, linear copolymer which is particularly advantageous for use in hair care compositions.

Still another object is to provide hair care formulations which exhibits both high viscosity and long-lasting curl retention for the user.

            What is described herein is a rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer.

            Suitable vinyl amides include vinyl pyrrolidone, vinyl caprolactam, N-vinyl formamide, N-vinylacetamide, N-vinyl-N-methylacetamide and mixtures thereof, preferably vinyl pyrrolidone.

            Suitable polymerizable carboxylic acids include (meth)acrylic acid, crotonic acid, itaconic acid, maleic acid and mixtures thereof, preferably acrylic acid.

            Suitable crosslinkers have at least two free radical polymerizable groups in the molecule, e.g. pentaerythritol triallylether, pentaerythritol triacrylate, pentaerythritol tetraacrylate or methylene bisacrylamide.

            The composition of the rheology modifier/hair styling resin of the present invention includes a vinyl amide, in an amount of by weight, 1-99% of the composition, a polymerizable carboxylic acid in an amount of 1-99% of the composition, and a crosslinker in an amount of 0.2-3%, based on total weight of monomers.

            Preferably, the vinyl amide monomer is present in an amount of 25-80%, the polymerizable carboxylic acid in an amount of 20-80%, and the crosslinker 0.4-2%, based on total weight...