Transparent copolyamide from 1,10-disubstituted C.sub.10 diamine

Details Transparent copolyamide from 1,10-disubstituted C.sub.10 diamine Transparent copolyamide from 1,10-disubstituted C.sub.10 diamine

1979-10-09

1981-03-24

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528339, 528340, 528346, 528347, 528349, C08G 6926

Patent

active

042581770

ABSTRACT:
There are described transparent copolyamides which consist of recurring structural elements of the formula I ##STR1## wherein R.sub.1 to R.sub.4 independently of one another are each hydrogen or alkyl having 1-4 C atoms, R.sub.5 and R.sub.6 independently of one another are each ethyl, n-propyl, isobutyl, --CH(R.sub.7)(R.sub.8) or --CH.sub.2 CH(R.sub.9)(R.sub.10), R.sub.7 is alkyl having 1-8 C atoms, R.sub.8 is alkyl having 1-4 C atoms, R.sub.9 is hydrogen or alkyl having 1-4 C atoms, and R.sub.10 is alkyl having 2-8 C atoms, and wherein the proportion of structural elements (I) where R.sub.5 /R.sub.6 .noteq.--CH.sub.2 CH(R.sub.9)(R.sub.10) is 10-40 percent by weight, and where R.sub.5 /R.sub.6 =--CH.sub.2 CH(R.sub.9)(R.sub.10) it is 35-55 percent by weight, relative to the total weight of the polymer. The novel copolyamides are characterized by good thermoplastic processing characteristics, low water absorption, good stability to hydrolysis, and negligible dependence of the mechanical and electrical properties on the surrounding humidity, and are suitable for producing transparent moulded articles.

REFERENCES:
patent: 3563959 (1971-02-01), Schade et al.

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