Compatible LCP blends via direct esterification

Details Compatible LCP blends via direct esterification Compatible LCP blends via direct esterification

1991-04-03

1993-01-26

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525905, C08L 6702, C08L 7112

Patent

active

051823349

ABSTRACT:
A process for making a compatible LCP blend by reactively esterifying an LCP having a carboxylic acid or ester end group with either PPO or PPS, or derivatives thereof, using a catalytic mixture containing boric acid and polyphosphoric acid or sulfuric acid. The carboxylic functionality on the LCP reacts with the hydroxyl end group on the PPO or the thiol end group on the PPS to form an ester or thioester linkage. The two polymers to be blended are melt mixed with the catalyst mixture and extruded.

REFERENCES:
patent: 4403057 (1983-09-01), Yamashita et al.
patent: 4855484 (1989-08-01), Muller et al.
patent: 4906693 (1990-03-01), Craun et al.

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