Novel aromatic copolyamides prepared from 3,4' diphenylene type

Details Novel aromatic copolyamides prepared from 3,4' diphenylene type Novel aromatic copolyamides prepared from 3,4' diphenylene type

1975-12-18

1978-02-21

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 302, 260 306R, 260 308R, 260 324, 260 326N, 260 49, 260 63R, 260 65, 260 78R, 264184, C08G 6932, C08G 6940, C08G 6942

Patent

active

040751724

ABSTRACT:
A novel fiber- or film-forming high-molecular-weight aromatic copolyamide consisting essentially of (1-A) a diamine recurring unit of the formula ##STR1## such as 3,4'-diaminodiphenyl ether or 3,4'-diaminodiphenyl sulfone, (1-B) a diamine recurring unit of the formula --HN--Ar.sub.1 --NH-- such as p-phenylene diamine, and (2) a dicarboxylic acid recurring unit of the formula --OC--Ar.sub.2 --CO-- such as terephthaloyl dichloride, wherein Y.sub.1, Ar.sub.1 and Ar.sub.2 are as defined in the specification, the total amount of recurring units (1-A) and (1-B) being substantially equimolar to recurring unit (2), and the proportion of recurring unit (1-A) being 7.5 to 40 mole% of the entire recurring units. The copolyamide is well soluble in solvents to give solutions having good flowability and stability that can afford shaped articles with superior thermal stability, fire retardancy and mechanical properties. A process for preparing the copolymer, and a dope of the copolymer are also provided.

REFERENCES:
patent: 3354127 (1967-11-01), Hill, Jr. et al.
patent: 3631003 (1971-12-01), Goodman et al.
patent: 3673162 (1972-06-01), Buckley et al.

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