Liquid crystalline polyester compositions containing carbon blac

Details Liquid crystalline polyester compositions containing carbon blac Liquid crystalline polyester compositions containing carbon blac

1998-03-31

2000-09-19

Cain, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524498, C08K 300

Patent

active

061213691

ABSTRACT:
Disclosed are liquid crystalline polyester molding compositions which are capable of being molded into an article having a thickness of less than 1.5 mm and a flammability classification of 94V-O as determined by the UL-94 20 mm Vertical Burning Test (ASTM D 3801) which are comprised of (i) certain all-aromatic, liquid crystal polyester consisting essentially of terephthalic acid residues, 2,6-naphthalenedicarboxylic acid residues, hydroquinone residues, and p-hydroxybenzoic acid residues; and (ii) about 0.1 to 10 weight percent, based on the total weight of the liquid crystalline polyester molding composition, carbon black. These liquid crystalline polyester molding compositions also may contain glass fiber. The disclosed molding compositions are particularly useful for manufacturing circuit boards and electrical connectors for use in various electronic devices.

REFERENCES:
patent: 4169933 (1979-10-01), Jackson, Jr., et al.
patent: 5110896 (1992-05-01), Waggoner et al.
patent: 5124397 (1992-06-01), Kanazawa et al.
Derwent Publications Ltd., London, GB; Class A23, AN 95-299707, XP002077694, & JP 07 196894 (Toray Ind Inc.) Aug. 1, 1995 (abstract).
Derwent Publications Ltd., London, GB; XP002077695, & JP 05 344049 A (Unitika Ltd) Nov. 22, 1993 (abstract).
JP 8-220407, Derwent Abstract, Aug. 30, 1996.
JP 08-013248, Derwent Abstract, Jan. 16, 1996 and translated claims.

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