Kao Corporation

Naomi Hori

Takashi Oda

Osamu Takiguchi

Katsumi Mita

Takako Taya

A film-forming resin which is a copolymer comprising (a) 30-80 mol % of a (meth)acrylamide monomer represented by the formula (1) wherein R.sup.1 represents CH.sub.3 or the like, R.sup.2 and R.sup.3 each represents H or a C.sub.4 -C.sub.12 alkyl group; (b) 2-50 mol % of a (meth)acrylamide monomer represented by the formula (2) wherein R.sup.4 and R.sup.5 each represents H or a C.sub.1 -C.sub.3 alkyl group; (c) 0.0001-50 mol % of a (meth)acrylate monomer or (meth)acrylamide monomer represented by the formula (3) wherein R.sup.6 represents C.sub.2 -C.sub.3 alkylene group, R.sup.7,R.sup.8 and R.sup.10 each represents CH.sub.3 or C.sub.2 H.sub.5, R.sup.9 represents an alkyl or phenyl group, a stands for 0 or 1 and b stands for 0 or 1, (d) 0-40 mol % of a (meth) acrylate monomer represented by the formula (4) wherein R.sup.11 and R.sup.12 each represents a C.sub.2 -C.sub.4 alkylene group, R.sup.13 represents H, CH.sub.2 or C.sub.6 H.sub.5 and d and e stands for an integer of 0-50; and (e) 0-20.0 mol % of a cross-linkable vinyl monomer; and a hair cosmetic composition containing the resin. ##STR1## The film-forming resin according to the present invention permits the retention of hair style for long hours even under high humidity conditions and in addition, has excellent removability upon hair washing. It permits the retention of beautiful finish when used as a hair-styling resin.

Film-forming resin and hair cosmetic composition containing the same

A film-forming resin which is a copolymer of (meth)acrylamide and (meth)acrylate monomers is disclosed. The film-forming resin can sustain a hair style over a prolonged period of time, even under high humidity, when used in a hair care product. Further, it is excellent in shampoo-washability and set-retaining power.

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Wakayama, Japan

Naomi Hori