Promotion of .epsilon.-caprolactam block copolymerization

Details Promotion of .epsilon.-caprolactam block copolymerization Promotion of .epsilon.-caprolactam block copolymerization

1984-12-17

1986-06-24

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

525420, 525432, 525437, 528313, 528315, 528318, 528319, 528323, C08G 6920

Patent

active

045968659

ABSTRACT:
A process for polymerizing .epsilon.-caprolactam to form a nylon-6 block copolymer in which a reactant stream containing .epsilon.-caprolactam, and a lactam polymerization initiator is brought into polymerizing admixture with a reactant stream containing .epsilon.-caprolactam and a lactam magnesium halide, wherein sufficient 2-oxo-1-pyrrolidinyl compound is added to the admixture either as 2-pyrrolidinone, 2-oxo-pyrrolidinyl magnesium halide or 2-oxo-1-pyrrolidinyl capped initiator compound to enhance the rate of polymerization of the .epsilon.-caprolactam. The lactam polymerization initiator is a telechelic oligomer or polymer containing a backbone which provides elastomeric segments in the nylon-6 block copolymer, and attached to the backbone are activated initiator groups which initiate the polymerization of .epsilon.-caprolactam in the presence of the lactam magnesium halide.

REFERENCES:
patent: 4223112 (1980-09-01), Hedrick et al.

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