Patent ID: 8202943

Claim:
A fluidity-improving agent, comprising: 0.5 to 99.5 parts by mass of a polymer (A) which is obtained by polymerizing a monomer mixture (a) comprising 0.5 to 99% by mass of (a1) an aromatic vinyl monomer, 0.5 to 99% by mass of (a2) a phenyl(meth)acrylate or a phenyl(meth)acrylate comprising a substituent in a phenyl group, and 0.5 to 5% by mass of (a3) a vinyl monomer comprising at least one functional group (X) selected from the group consisting of an epoxy group, a carboxyl group, a hydroxyl group and an amino group; and 0.5 to 99.5 parts by mass of a polymer (B) which is obtained by polymerizing a monomer mixture (b) comprising (b1) a phenyl(meth)acrylate or a phenyl(meth)acrylate comprising a substituent in a phenyl group with a compound comprising a functional group (Y) capable of reacting with the functional group (X), with the proviso that a total of the polymer (A) and the polymer (B) is 100 parts by mass.