Isp Investments Inc.

Roger L Mc Mullen, Jr

Janusz Z Jachowicz

Kou-Chang Liu

Philip F Wolf

Yuanzhen Zhong

Thomas Winkler

A stable, aqueous cationic hydrogel of, by weight, 1-50% of a crosslinked cationic copolymer of 5-95% vinylpyrrolidone (VP) and 5-95% 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomers, a crosslinking agent in an amount of 0.05-1% of said monomers, and water is described. The hydrogel has a pH of about 10 and a Brookfield viscosity of about 650 (Model DV-II&plus;, RV spindle &num;3, speed 10 rpm); it can increase its viscosity by up to 40&times; at a pH of 3-9 and absorb up to 200&times; its weight of water. The hydrogel also can effectively condition hair even in the presence of an anionic surfactant.

Stable, aqueous cationic hydrogel

What is described herein are conditioning/styling terpolymers of vinylpyrrolidone (VP), dimethylaminopropyl methacrylamide (DMAPMA) and C,-C,alkyl dimethylaminopropyl methacrylic acid quaternized monomers (QDMAPMA), in a defined compositional range. Hair and skin care compositions which include these terpolymers exhibit advantageous low tackiness and high humidity resistance.

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Bloomfield, NJ, United States of America

Roger L Mc Mullen, Jr