Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1983-12-27
1985-03-26
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525420, 528313, 528314, 528315, 528317, 528323, C08G 6920
Patent
active
045074658
ABSTRACT:
A block copolyamide having effectively improved impact strength is obtained by polymerizing a mixture comprising substantially from about 50 to about 95 parts by weight of lactam and from about 50 to about 5 parts by weight of polyol in the presence of catalyst for an anionic polymerization and activator represented by the following formula (I); ##STR1## wherein A denotes a bifunctional organic residue having at least one kind of heteroatoms selected from the group consisting of N, O, S, F, Cl, Br and I, and Y and Y' denote an acyl group selected from the group consisting of ##STR2## respectively, and n and n' denote an integer of 3 to 11 respectively, or by polymerizing, in the presence of catalyst for anionic polymerization, a mixture comprising substantially from about 50 to about 95 parts by weight of lactam and from about 5 to about 50 parts by weight of prepolymer obtained by a reaction of polyol and activator represented by the above formula (I), wherein A denotes a bifunctional aromatic residue having at least one halogen atom attached to the aromatic ring, and Y, Y', n and n' denote the same.
REFERENCES:
patent: 4031164 (1977-06-01), Hedrick et al.
Chiba Kazumasa
Kobayashi Kazuhiko
Susuki Tosaku
Anderson Harold D.
Miller Austin R.
Toray Industries Inc.
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