Copolymers of lactams and azetidine-2,4-dione-based prepolymers

Details Copolymers of lactams and azetidine-2,4-dione-based prepolymers Copolymers of lactams and azetidine-2,4-dione-based prepolymers

C - Chemistry, Metallurgy

08

G

400/2016

C08G 69/14 (2006.01) C08G 69/16 (2006.01) C08G 73/10 (2006.01) C08G 73/14 (2006.01)

Patent

CA 1223683

-1- ABSTRACT OF THE DISCLOSURE 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.

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