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Priority to TW82108494ApriorityCriticalpatent/TW255906B/en
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Publication of TW255906BpublicationCriticalpatent/TW255906B/en
A polystyrenic resin composition, which comprises: (1) 40~90 wt% of polystyrenic copolymer (A) in which the polystyrenic copolymer comprises 60~90 wt% of ethylenic aromatic monomer, 10~40 wt% of unsaturated nitrile monomer and/or methyl acrylate monomer, and 0~40 wt% of other copolymerizable monomer; (2) 10~60 wt% of rubber-like graft copolymer (B) in which the rubber-like graft copolymer comprises 70~95 wt% of rubber (B1) and 5~30 wt% of styrenic copolymer (B2) (including grafted and not grafted on the rubber) in which the styrenic copolymer (B2) comprises 60~90 wt% of ethylenic aromatic monomer, 10~40 wt% of unsaturated nitrile monomer and/or methyl acrylate monomer, and 0~30 wt% of other copolymerizable monomer, and the un-grafted styrenic copolymer is less than 10 wt% of the total styrenic copolymer (B2), and the molecular weight of the graft styrenic copolymer is 20,000~150,000.