Patent ID: 7776964

Claim:
A thermoplastic ABS resin composition comprising: (a) 2 to 25 parts by weight of a graft copolymer particle comprising rubber having a volume average particle diameter ranging from 0.05 μm to less than 0.18 μm; (b) 2 to 25 parts by weight of a graft copolymer particle comprising rubber having a volume average particle diameter ranging from 0.18 μm to less than 0.4 μm; (c) 2 to 18 parts by weight of a graft copolymer particle comprising rubber having a volume average particle diameter ranging from 0.4 μm to 4 μm; (d) 20 to 70 parts by weight of a branched vinyl cyanide-vinyl aromatic copolymer; and (e) 1 to 60 parts by weight of a long-chain linear vinyl cyanide-vinyl aromatic copolymer, wherein each of graft copolymer particles (a), (b), and (c) comprises butadiene.