US 4,075,172 AGranted

Novel aromatic copolyamides prepared from 3,4' diphenylene type diamines, and shaped articles therefrom

AssigneeTeijin Limited

InventorsShuji Ozawa, Yasuo Nakagawa, Kichiro Matsuda, Toshio Nishihara, Hideki Yunoki

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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.

Claims15

Dependent claims

A fiber- or film-forming high-molecular weight aromatic copolyamide consisting essentially of (1-A) a diamine recurring unit of the following formula ##STR72## wherein Y.sub.1 is at least one divalent-moiety selected from the group consisting of --O--, --S--, --SO.sub.2 --, ##STR73## (1-B) a diamine recurring unit of the following formula

--HN--AR.sub.1 --NH-- (1-B)
wherein Ar.sub.1 represents a phenylene group, a naphthylene group, a biphenylene group or a group of the formula ##STR74## wherein Y.sub.2 has the same definition as Y.sub.1 and is identical to, or different from, Y.sub.1, all of which groups have their bond chains extending in a coaxial or parallel direction, and (2) a dicarboxylic acid-type recurring unit of the following formula
--OC--Ar.sub.2 --CO-- (2)
wherein Ar.sub.2 has the same definition as Ar.sub.1, and is identical to, or different from, Ar.sub.1, the total mole number of the diamine recurring units of formulae (1-A) and (1-B) being substantially equal to the mole number of the dicarboxylic acid-type recurring unit of formula (2), and the proportion of the diamine recurring unit (1-A) being 7.5 to 40 mole% of the entire recurring units.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/641,898Filed 18 Dec 1975
Priority: JA 49-14902727 Dec 1974
Granted: 21 Feb 1978
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C08G 69/32
Derived from polyamines and polycarboxylic acids: from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups…
D01F 6/805
From copolyamides: from aromatic copolyamides
C08G
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
D01F
Chemical features in the manufacture of artificial filaments, threads, fibres, bristles or