WEATHER-RESISTANT RUBBER-MODIFIED VINYL-BASED GRAFT COPOLYMER WITH GOOD ELONGATION PROPERTY, HEAT-RESISTNCE, AND HARDNESS AND RESIN COMPOSITION THEREOF

摘要

PURPOSE: A weather-resistant rubber-modified vinyl-based graft copolymer is provided to ensure excellent heat resistance, tensile strength, and hardness while maintaining optical properties. CONSTITUTION: A rubber-modified vinyl-based graft copolymer resin is formed by performing graft polymerization of a vinyl cyanide monomer and an aromatic vinyl monomer into elastomer latex. The rubber latex is formed by surface-modifying a butadiene rubber with an acrylate rubber having a glass transition temperature lower than a room temperature(25 °C). The grain size of the butadiene rubber is 250-350 nm. The vinyl cyanide monomer is one or more selected from the group consisting of acrylonitrile, methacrylonitrile and ethacrylonitrile.