HEAT-RESISTANT SAN RESIN, METHOD FOR MANUFACTURING SAME, AND HEAT-RESISTANT ABS RESIN COMPOSITION COMPRISING SAME

摘要

Disclosed are a heat-resistant SAN resin, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same. More particularly, a heat-resistant SAN resin comprising 60 to 75 wt% of ±-methylstyrene, 25 to 35 wt% of a vinyl cyan compound, and 0 to 10 wt% of an aromatic vinyl compound (except for ±-methylstyrene), the heat-resistant SAN resin having a degree of branching of 0.40 to 0.60, a molecular weight of 90,000 to 150,000 g/mol, and a glass transition temperature (Tg) of 124 to 140°C, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same are disclosed. According to the present invention, a heat-resistant SAN resin having excellent heat resistance and productivity, and excellent improvement effects for heat resistance, environmental crack resistance, color, and processability when applied to an ABS resin, a method of preparing the same, and a heat-resistant ABS resin composition comprising the same are disclosed.