Polyamide block copolymer from lactam and azetidine-2,4-dione

Details Polyamide block copolymer from lactam and azetidine-2,4-dione Polyamide block copolymer from lactam and azetidine-2,4-dione

1984-05-07

1985-10-29

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

525419, 525420, 525434, 525435, 528292, 528323, 528342, C08G 6914, C08G 7310

Patent

active

045501572

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 polyamine 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 bis azetidine-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), Hendrick et al.
patent: 4031164 (1977-06-01), Hedrick et al.
patent: 4034015 (1977-07-01), Hedrick et al.

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