Process for production of polyamides, polyamides produced by sai

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528335, 528347, C08G 6926, C08G 6928

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active

055041850

ABSTRACT:
A process for the production of a polyamide, which comprises polycondensing adipic acid prepared by nitric acid oxidation and containing 1 ppm by weight or less of a free mineral acid as an impurity with a diamine represented by formula (1)

REFERENCES:
patent: 4185150 (1980-01-01), Kuceski
patent: 4352926 (1982-10-01), Matsuoka et al.
patent: 4375552 (1983-03-01), Kuceski
patent: 4640976 (1987-02-01), Curatolo et al.
patent: 4719284 (1988-01-01), Nielinger et al.
patent: 4760129 (1988-07-01), Haering et al.
Database WPI, Week 7452, Derwent Publications Ltd., London, GB; AN 74-89316V & JP-A-49 053 945 (Toyobo Co) 25 May 1974.

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