High impact nylon/polyurea copolymer

Details High impact nylon/polyurea copolymer High impact nylon/polyurea copolymer

1985-12-23

1987-06-16

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 61, 528 68, 528 76, C08G 1834

Patent

active

046737227

ABSTRACT:
A method of forming a high impact strength article of nylon/polyurea copolymer by reaction injection molding precursors of a polyurea prepolymer and a caprolactam together including the steps of prereacting a diisocyanate, a diamine and caprolactam to form a polyurea prepolymer having carbamyl caprolactam terminated end groups and then rapidly mixing the prepolymer with suitable amounts of caprolactam and a caprolactam alkali metal salt initiator and adding the mixture to a heated mold to polymerize the mixture and form the article.

REFERENCES:
patent: 4154773 (1979-05-01), Hergenrother et al.

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