Polymerization of lactam with graft copolymer promoter

Details Polymerization of lactam with graft copolymer promoter Polymerization of lactam with graft copolymer promoter

1983-05-10

1984-05-15

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

525178, 525183, 525184, 525426, 528315, 528316, 528318, 528323, 528326, C08G 6920

Patent

active

044489560

ABSTRACT:
Polyamides such as nylon-6 type polyamides are prepared by the reaction or copolymerization of a major amount by weight of a lactam and a minor amount by weight of a graft copolymer of maleic anhydride on a low molecular weight liquid conjugated diene polymer or copolymer or of a copolymer of a conjugated diene and a monovinyl aryl monomer or a nitrile. For example, a graft of maleic anhydride on liquid butadiene/acrylonitrile copolymer is copolymerized with epsilon-caprolactam using an anionic lactam polymerization catalyst (a lactamate salt) like the reaction product of ethyl magnesium bromide and epsilon-caprolactam. The present invention may be useful in a RIM (Reaction Injection Molding) process. The resulting polyamides have improved impact strength and water resistance. They can be used to make automobile and truck bodies and parts.

REFERENCES:
patent: 2303177 (1942-11-01), Schlack
patent: 3017391 (1962-01-01), Mottus et al.
patent: 3017392 (1962-01-01), Butler et al.
patent: 3481923 (1969-12-01), Naarmann et al.
patent: 3622535 (1971-11-01), Greenley
patent: 3887643 (1975-06-01), Selman

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