Patent ID: 8039541

Claim:
A method for producing a (meth)acrylic polymer particle, comprising polymerizing a monomer or monomer mixture (B) to form a polymer (b) in the presence of a polymer (a) obtained by a process comprising polymerizing a monomer or monomer mixture (A), wherein a glass transition temperature (Tg) of the polymer (a) as calculated from the FOX equation is 90° C. or above, a solubility parameter of the polymer (a) is 19.90 (J/cm 3 ) 1/2 or below, and a solubility parameter of the polymer (b) is 20.22 (J/cm 3 ) 1/2 or above, and the monomer or monomer mixture (A) comprises 10% by mass or more of t-butyl methacrylate.