Process for the production of high impact block copolyamide

Details Process for the production of high impact block copolyamide Process for the production of high impact block copolyamide

1983-03-28

1984-11-27

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525183, 525184, C08F 830, C08L 7700, C08L 3500

Patent

active

044852134

ABSTRACT:
A process for producing high impact block copolyamide is described, comprising anion polymerizing .omega.-lactam in the presence of a prepolymer polymerization accelerator. The prepolymer is prepared by reacting a butadiene homopolymer and/or butadiene-acrylonitrile copolymer containing hydroxyl groups at the terminals thereof with polymethylene polyphenylene isocyanate or tolylene diisocyanate at an equivalent ratio of isocyanate group to hydroxyl group (NCO/OH) of 1:1 or more. With the thus-produced high impact block copolyamide, impact strength is greatly improved, and bleeding of polybutadiene is not observed.

REFERENCES:
patent: 2877212 (1959-03-01), Seligman
patent: 3859382 (1975-01-01), Hergenrother
patent: 3887643 (1975-06-01), Selman
patent: 4070344 (1978-01-01), Hergenrither
patent: 4151222 (1979-04-01), Hergenrother

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