发明授权
US5032661A Thermoplastic polyester-carbonate/polysiloxane block copolymers 失效
热塑性聚酯 - 碳酸酯/聚硅氧烷嵌段共聚物

Thermoplastic polyester-carbonate/polysiloxane block copolymers
摘要:
Polyester-carbonate/polysiloxane block copolymers containing the following recurring structural units: ##STR1## wherein the structural units (1) comprise at least 75 wt.% of the sum of the structural units (1) and (2), exhibit better low temperature tough fracture properties than the known polyester-carbonate/polysiloxane block copolymers containing comparable recurring structural units on comparison of polyester-carbonate/polysiloxane block copolymers of the same heat resistance.
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