Azetidinedione-monocarbonamide capped prepolymer

Details Azetidinedione-monocarbonamide capped prepolymer Azetidinedione-monocarbonamide capped prepolymer

1985-11-21

1987-05-26

Anderson, Harold D.

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 73, 528322, 528323, C08G 1828, C08G 6914

Patent

active

046687564

ABSTRACT:
Novel polyamide block copolymers are provided which comprise a central block of a soft segment derived from the residue of a polymeric polyol or polycarboxylic acid joined to terminal hard segment polyamide blocks. The linkages which join the blocks are of a novel type and are the opened form of certain monoazetidine-2,4-dione rings.
The block copolymers can be prepared very rapidly via anionically polymerizing lactams on to prepolymer soft segments containing terminal azetidine-2,4-dione rings.
The speed with which the polymerizations can be carried out make the block copolymers particularly useful for the RIM preparation of molded parts.

REFERENCES:
patent: 3862262 (1975-01-01), Hedrick et al.
patent: 4031164 (1977-06-01), Hedrick et al.
patent: 4034015 (1977-07-01), Hedrick et al.
patent: 4550157 (1985-10-01), Dai et al.

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