| 摘要 |
The present invention pertains to a vinyl chloride resin composition that includes 100 parts by weight of a vinyl chloride resin (A) and 0.1-20 parts by weight of a processing aid (B), said vinyl chloride resin composition being characterized in that: the processing aid (B) includes 50-95 wt% of a first polymer (b1) and 5-50 wt% of a second polymer (b2); the processing aid (B) has a weight average molecular weight of 100,000-4,000,000; the glass transition temperature Tg of the first polymer (b1) in the processing aid (B) is 5-110°C; the first polymer (b1) in the processing aid (B) comprises, per 100 wt% of the first polymer (b1) as a whole, 12-28 wt% of a vinyl cyanide compound, 32-88 wt% of an aromatic vinyl compound, 0-40 wt% of an alkyl acrylate, and 0-30 wt% of other vinyl compounds capable of copolymerization with the other constituents; the glass transition temperature Tg of the second polymer (b2) in the processing aid (B) is -40-50°C; and the glass transition temperature Tg of the first polymer (b1) is at least 40°C higher than the glass transition temperature Tg of the second polymer (b2). |
