TRILAMINAR-STRUCTURED ACRYLIC POLYMER PARTICLE, PREPARATION METHOD THEREFOR AND PLASTISOL

摘要

PROBLEM TO BE SOLVED: To provide an acrylic polymer particle which is excellent in dispersibility in a plasticizer and is suitable for obtaining a plastisol which is excellent in shelf stability of sol viscosity, shows no bleeding of the plasticizer and yields a molded product excellent in adhesion to a metal. SOLUTION: The trilaminar-structured acrylic polymer particle consists of (A1) 30-80 mass% core polymer layer obtained by polymerizing (a1) a (meth)acrylate monomer, (A2) 16-66 mass% intermediate polymer layer obtained by polymerizing (a2) a (meth)acrylate monomer mixture containing a (meth)acrylate monomer having a hydroxyl group and (A3) 4-9 mass% outer shell polymer layer obtained by polymerizing (a3) a (meth)acrylate monomer mixture containing a monomer having an organic acid group. The organic acid group contained in the outer shell polymer layer (A3) is neutralized. COPYRIGHT: (C)2005,JPO&NCIPI