| 摘要 |
<p>1301374 N-vinyl pyrrolidone copolymers L'OREAL 8 April 1970 [8 April 1969] 11416/71 Divided out of 1301373 Heading C3P N-vinyl pyrrolidone (NVP) copolymers comprise 90 to 85% NVP and 10 to 15 % of allyl stearate, octadecyl vinyl ether, octadecene-1 or methallyl stearate, or 50 to 85% NVP, 10 to 40% of allyl acetate or stearate, octadecane-1 or octadecylvinylether, and 5 to 10% of allyloxyacetic acid, crotonic acid, vinyl acetic acid or allylacetic acid. The copolymers are obtained by conventional free-radical copolymerization and may be neutralized.</p> |
