Liquid crystalline polymer composition
AssigneeE.I. du Pont de Nemours and Company
InventorsRichard Jackson, Marion Waggoner
Life of this patent
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Abstract
Liquid crystalline polymers containing specified ratios of repeat units derived from hydroquinone, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid and optionally terephthalic acid have exceptionally high heat distortion temperatures, making especially useful for service at high temperatures. Compositions containing reinforcing agents, especially fibrous or platy reinforcing agents are particularly useful. These polymers and compositions are useful for electrical and electronic connectors, and as films for the electronics industry, and for other uses.
Claims9
A composition comprising a liquid crystalline polymer consisting essentially of repeat units derived from:
- (a) 100 molar parts of hydroquinone;
- (b) about 85 to 100 molar parts of 2,6-naphthalenedicarboxylic acid;
- (c) 0 to about 15 molar parts of terephthalic acid;
- and
- (d) about 50 to about 150 molar parts of 4-hydroxybenzoic acid;
- and provided that:
- the total molar parts of (b) plus (c) is 100;
- and
- when said molar parts of said 2,6-naphthalenedicarboxylic acid is about 85 to 88, said molar parts of said 4-hydroxybenzoic acid is about 50 to about 130.
Dependencies are inferred from the claim text.