Patent ID: 8664338

Claim:
A processability improver for foam molding, comprising: a (meth)acrylic polymer powder with a weight average molecular weight of 2,000,000 to 7,000,000, wherein the (meth)acrylic polymer powder comprises 1 to 20% by weight of a (meth)acrylic polymer (A) with a weight average molecular weight of 10,000 to 300,000, and 80 to 99% by weight of a (meth)acrylic polymer (B) with a weight average molecular weight of greater than 2,000,000 to 7,000,000, and the (meth)acrylic polymer powder comprises a primary particle having a multilayer structure, and the primary particle comprises an inner layer containing the (meth)acrylic polymer (A) and an outer layer containing the (meth)acrylic polymer (B).