Transparent copolyamide from isophorone diamine and substituted

Details Transparent copolyamide from isophorone diamine and substituted Transparent copolyamide from isophorone diamine and substituted

1981-06-12

1983-03-22

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528338, 528339, 528340, 528346, 528347, 528349, C08G 6926

Patent

active

043776833

ABSTRACT:
Transparent copolyamides are obtained by reacting a mixture (A) of isophoronediamine and isophthalic acid, terephthalic acid or a mixture of isophthalic acid and terephthalic acid with a mixture (B) of a diamine ##STR1## and terephthalic acid or a mixture of terephthalic acid and isophthalic acid or with a mixture (C) of a diamine ##STR2## and terephthalic acid or isophthalic acid or mixtures thereof, R', R" and R.sub.1 to R.sub.6 being as defined in the patent claim.
The reaction can also be carried out with an excess of diamine and with addition of H.sub.3 PO.sub.2 or salts thereof or white phosphorus.
The novel copolyamides are distinguished by good thermoplastic processability, low water absorption and good resistance to hydrolysis, and are useful for the production of transparent mouldings.

REFERENCES:
patent: 3173898 (1965-03-01), Sum
patent: 3294759 (1966-12-01), Gabler
patent: 3352831 (1967-11-01), Schmitt et al.
patent: 3352834 (1967-11-01), Schmitt et al.
patent: 3352942 (1967-11-01), Schmitt et al.
patent: 3627736 (1971-12-01), Raum et al.
patent: 4258176 (1981-03-01), Pfeifer et al.
CA, 93, 168846z (1980) (.dbd.AN).
CA, 52, 19161c (1958) (.dbd.AF).
CA, 46, 132f (1952) (.dbd.AH).
CA, 72, 91104n (1970) (.dbd.AN).
CA, 90, 104626h (1979) (.dbd.AO).

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