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US4611034A Branched thermoplastically processible impact-resistant polyamides 失效
分支热塑性可加工的耐冲击聚酰胺

Branched thermoplastically processible impact-resistant polyamides
摘要:
Polyamide block copolymers obtained by activated anionic polymerization of lactams having at least 5 ring members in the presence of basic catalysts, polyisocyanates as activators and amino-terminated polyethers, which are characterized in that the amino-terminated polyethers have a functionality of at least 3.0 preferably at least 3.2, and a molecular weight of at least 3500, and the polyisocyanates are aliphatic or cycloaliphatic polyisocyanates.
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