METHACRYLIC RESIN COMPOSITION

摘要

A methacrylic resin composition, comprising a methacrylic resin which comprises 50-90% by mass of a structural unit derived from methyl methacrylate and 10-50% by mass of a structural unit derived from methacrylic acid alicyclic hydrocarbon ester, wherein the difference between the yellow index (YI4) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 4 minutes and the yellow index (YI1) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 1 minute is 3 or less, and the melt flow rate at a temperature of 230° C. and under a load of 3.8 kg is 5 g/10 min or more.

主权项

1. A methacrylic resin composition, comprising a methacrylic resin which comprises 50 to 90% by mass of a structural unit derived from methyl methacrylate and 10 to 50% by mass of a structural unit derived from methacrylic acid alicyclic hydrocarbon ester,
wherein the difference between the yellow index (YI4) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 4 minutes and the yellow index (YI1) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 1 minute is 3 or less, and the melt flow rate at a temperature of 230° C. and under a load of 3.8 kg is 5 g/10 min or more.