Liquid-crystalline resin compositions and moldings
First Claim
1. A liquid-crystalline resin composition comprising 100 parts by weight of a semi-aromatic liquid-crystalline compound selected from the group consisting of polyester and polyester-amide, from 0.001 to 5 parts by weight of at least one or more compounds selected from the group consisting of phosphorous acid and hypophosphorous acid and their salts with a metal selected from the group consisting of Group I and Group II metals, and from 0.01 to 10 parts by weight of red phosphorus.
1 Assignment
0 Petitions
Accused Products
Abstract
A liquid-crystalline resin composition comprising 100 parts by weight of a semi-aromatic liquid-crystalline polyester and/or a semi-aromatic liquid-crystalline polyester-amide, from 0.001 to 5 parts by weight of at least one or more compounds selected from phosphorous acid, hypophosphorous acid and their salts, and from 0.01 to 10 parts by weight of red phosphorus has good flame retardancy, low anisotropy, good heat resistance and good hydrolysis resistance, and is useful as engineering plastic.
-
Citations
13 Claims
- 1. A liquid-crystalline resin composition comprising 100 parts by weight of a semi-aromatic liquid-crystalline compound selected from the group consisting of polyester and polyester-amide, from 0.001 to 5 parts by weight of at least one or more compounds selected from the group consisting of phosphorous acid and hypophosphorous acid and their salts with a metal selected from the group consisting of Group I and Group II metals, and from 0.01 to 10 parts by weight of red phosphorus.
- 2. A liquid-crystalline resin composition comprising a semi-aromatic liquid-crystalline compound selected from the group consisting of polyester and polyester-amide, which has a phosphorus content of from 0.01 to 15% by weight, and a metal selected from the group consisting of Group I and Group II metals in a content of from 5 to 15000 ppm, the ratio of said phosphorus content (a) to said metal content (b) being not smaller than 1.5.
-
11. A method for producing a liquid-crystalline resin composition, comprising adding to a polymer selected from the group consisting of a semi-aromatic liquid-crystalline polyester and a semi-aromatic liquid-crystalline polyester-amide, at least one or more compounds of phosphorous acid, hypophosphorous acid and their metal salts in an amount of from 0.001 to 5 parts by weight relative to 100 parts by weight of said polymer, and adding thereto red phosphorus in an amount of from 0.01 to 10 parts by weight relative to the same after the completion of the polymerization.
Specification