Patent ID: 6812264
Filing Date: 2004-11-02
Classification: C08J

Abstract:
A foamable polyester resin composition comprising:(A) 100 parts by weight of a polyester resin; (B) from 0.5 to 30 parts by weight of a (meth)acrylic ester polymer or a polymer mixture obtained by polymerizing (i) from 5 to 40 parts by weight of a second monomer mixture comprising (a) from 0 to 49% by weight methyl methacrylate, (b) from 51 to 100% by weight of at least one monomer selected from methacrylic esters other than methyl methacrylate and acrylic esters, and (c) from 0 to 20% by weight of at least one vinyl monomer copolymerizable therewith, in the presence of a polymer latex which is obtained by emulsion-polymerizing (ii) from 60 to 95 parts by weight of a first monomer mixture comprising (a) from 51 to 100% by weight methyl methacrylate, (b) from 0 to 49% by weight at least one monomer selected from methacrylic esters other than methyl methacrylate and acrylic esters, and (c) from 0 to 20% by weight of at least one vinyl monomer copolymerizable therewith wherein when 0.1 g of said polymer latex is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.7 to 1.9 as measured at 30Â° C., andwherein, when 0.1 g of the (meth)acrylic ester polymer or the polymer mixture is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.65 to 1.7 as measured at 30Â° C., andwherein the sum of the first and second monomer mixtures is 100 parts by weight;(C) from 0.1 to 30 parts by weight of a filler; and (D) a blowing agent.