Polyamides and objects obtained from them

Details Polyamides and objects obtained from them Polyamides and objects obtained from them

1992-12-30

1995-06-06

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528326, 5283291, 528331, C08G 6908, C08G 6914, C08G 6936

Patent

active

054224187

ABSTRACT:
The present invention relates to new polyamides comprising, on a mass basis:
(a) 45 to 75% of an x,T unit, x being between 4 and 12 inclusive, the x,T unit being the condensation product of a diamine having x carbon atoms and of terephthalic acid, and
(b) 55 to 25% of an aliphatic unit -HN-(CH.sub.2).sub.n -CO, n being between 6 and 14 inclusive. and the terpolyamides obtained by including a monomeric unit (c) such as the unit 6 or 6,I as a replacement for part of the aliphatic unit (b).
The polyamide compositions thus obtained exhibit a Tg lower than 130.degree. C., a Tm higher than 230.degree. C. and a good crystallizability.

REFERENCES:
patent: 4113708 (1978-09-01), Chapman et al.
patent: 4218509 (1980-08-01), Edgar et al.
patent: 5081222 (1992-01-01), Reimann et al.
Patent Abstracts of Japan, vol. 11 No. 394 (C465) (2841), Dec. 1987.

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