Patent ID: 8497335

Claim:
A surface conditioner for a coating agent comprising: a copolymer comprising an acrylate monomer (A) having a siloxy group, an N-vinyllactam monomer (B), and an alkyl(meth)acrylate monomer (C) of which an alkyl group has 1 to 12 carbon atoms; wherein a ratio by weight of the monomer (A): the monomer (B): the monomer (C): is 1-40: 2-80: 10-97, weight average molecular weight of the copolymer is 1000 to 120000, and the copolymer has a rising temperature ranging from 280 to 400°, and the rising temperature is obtained by thermo-gravimetric analysis and identified by the temperature when a weight of a sample of the copolymer is reduced during heat up beyond 10% through decomposition or sublimation thereof.