METHACRYLIC POLYMER PARTICLES, PROCESS FOR PRODUCTION THEREOF, PLASTISOL COMPOSITIONS MADE BY USING THE PARTICLES, AND ARTICLES MADE BY USING THE COMPOSITIONS

摘要

The invention provides industrially useful (meth)acrylic polymer particles capable of forming a plastisol which is so excellent in storage stability, particularly at 40°C or above, that it little causes gelation in storage and can be kept in a sol state and which can give moldings excellent in flexibility and chipping resistance; a process for the production of the particles; and plastisol compositions made by using the particles. A process for the production of (meth)acrylic polymer particles which comprises polymerizing a monomer or monomer mixture (B) in the presence of a polymer (a) obtained by the polymerization of a monomer or monomer mixture (A) to form a polymer (b), wherein the glass transition temperature (Tg) of the polymer (a) is 90°C or above as calculated from the FOX equation and the solubility parameters of the polymers (a) and (b) are 19.90(J/cm3)1/2 or below and 20.22(J/cm3)1/2 or above respectively.