Aromatic copolyamide containing 3,4'-diphenylene moiety

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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528176, 528179, 528180, 528182, 528184, 528208, 528229, 528321, 528331, 528337, 528340, 528344, 528348, C08G 6932

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active

044131143

ABSTRACT:
An aromatic copolyamide comprising recurring units (A) of the formula (I), (B) of the formula (II) and (C) of the formula (III): ##STR1## wherein in (I), (II) and (III), Ar.sub.1 is phenylene, naphthylene or biphenylene radicals, each having two valence bonds oriented meta; Ar.sub.2 is phenylene, naphthylene or biphenylene radicals, each having two valence bonds oriented coaxially or in parallel to each other and radicals of the formula (IV): ##STR2## wherein Y.sub.1 and Y.sub.2 are independently ##STR3## and; X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5 and X.sub.6 respectively are independently --NH-- and --CO-- radicals, connected to each other to form an amide bond (--NHCO-- or --CHNH--), and the molar proportions of said recurring units (A), (B), and (C) fall within a quadrilateral defined by the co-ordinates P, Q, R and S or on a twice-turned line defined by the co-ordinates Q, R, S and P:

REFERENCES:
patent: 4075172 (1978-02-01), Ozawa et al.

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