Preparation of branched polyamides

Details Preparation of branched polyamides Preparation of branched polyamides

1996-11-14

1998-06-02

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528323, 528327, 528328, 528332, 528397, 528403, 528405, C08G 6908, C08G 6914, C08G 7310

Patent

active

057601631

ABSTRACT:
Branched polyamides are prepared by mixing
A) from 10 to 99.7% by weight of a melt of a polyamide prepolymer having a viscosity number of from 40 to 90 ml/g with
B) from 0.3 to 6% by weight of a polybasic carboxylic acid, where the number n of the free carboxylic acid groups is 3.ltoreq.n.ltoreq.10, and also
C) from 0 to 80% by weight of further additives and processing aids,
where the percentages by weight of the components A) to C) add up to 100%, and subsequently further condensing the mixture in the solid phase.

REFERENCES:
patent: 4599400 (1986-07-01), Tomalia et al.
patent: 5346984 (1994-09-01), Hasegawa et al.
J.M. Warakomski, Polymer Preprints, vol. 30, No. 1, pp. 117-118.

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