US 4,245,066 AGranted

Wholly aromatic polyamide blend composition

AssigneeTeijin Limited

InventorsYasuo Nakagawa, Keizo Shimada, Tsutomu Nakamura

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Abstract

A wholly aromatic polyamide composition which is suitable for producing filaments or fibers having not only an excellent heat-resisting property but also, a superior dyeing property, which comprises: (A) 50 to 95% by weight of poly-m-phenylene isophthalamide, and; (B) 5 to 50% by weight of at least one other aromatic polyamide comprising: (1) an amine moiety consisting of essentially of (a) 35 to 100 molar % of at least one phenylene diamine in which the phenylene group has 1 to 4 substituents respectively selected, independently from each other, from the group consisting of halogen atoms and alkyl radicals having 1 to 4 carbon atoms, and (b) 0 to 65 molar % of at least one other aromatic diamine, and; (2) an acid moiety consisting essentially of at least one aromatic dicarboxylic acid.

Claims11

Dependent claims

A wholly aromatic polyamide composition, comprising:

(A) 50 to 95% by weight of a poly-m-phenylene isophthalamide having an inherent viscosity of from 0.8 to 2.5, determined at a concentration of 0.5 g/dl in a concentrated sulfuric acid at a temperature of 30.degree. C., and;
5 to 50% by weight of at least one other aromatic polyamide which comprises:
(1) an amine moiety consisting essentially of
(a) 35 to 100 molar % of at least one phenylene diamine in which the phenylene group has 1 to 4 substituents respectively selected, independently from each other, from the group consisting of halogen atoms and alkyl radicals having 1 to 4 carbon atoms, and;
(b) 0 to 65 molar % of at least one other aromatic diamine, and;
(2) an acid moiety consisting essentially of at least one aromatic dicarboxylic acid and which has an inherent viscosity of from 0.05 to 3.0, determined at a concentration of 0.5 g/dl, in a concentrated sulfuric acid, at a temperature of 30.degree. C.

3 more elements

Dependencies are inferred from the claim text.