| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive polymer emulsion for forming a flexible film, and useful for a cosmetic having excellent formulation stability (ethanol resistance) and coatability (slippage resistance); and to provide the cosmetic obtained by formulating the emulsion. SOLUTION: The polymer emulsion for the cosmetic contains (A) a polymer containing a hydrophobic monomer such as a 1-6C alkyl (meth)acrylate, and (B) a hydrophilic monomer such as a (meth)acrylic acid (salt) and a compound represented by formula (III-1) [wherein, R<SP>1</SP>is H or a methyl group; X is -O- or -NH-; R<SP>4-1</SP>is -R<SP>5</SP>SO<SB>3</SB>M or -R<SP>6</SP>N<SP>+</SP>(R<SP>7</SP>)(R<SP>8</SP>)(R<SP>9</SP>)-Y<SP>-</SP>(R<SP>5</SP>is a 1-5C alkylene group; M is H or a cation; R<SP>6</SP>is a 1-4C alkylene group; R<SP>7</SP>, R<SP>8</SP>and R<SP>9</SP>are each a 1-3C alkyl group; and Y<SP>-</SP>is an anion)], obtained by copolymerizing the monomer components satisfying the relation of (A)/(B) (by weight)=(80/20)-(99.9/0.1), and having 5-(-50)°C Tg. The cosmetic contains the polymer emulsion. COPYRIGHT: (C)2006,JPO&NCIPI
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