Wholly aromatic polyesters with reduced char content

Details Wholly aromatic polyesters with reduced char content Wholly aromatic polyesters with reduced char content

1988-06-17

1990-08-28

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

524601, 528179, 528180, C08G 6360

Patent

active

049526634

ABSTRACT:
This invention relates to the preparation of wholly aromatic polyesters from monomers having a total ash content of no more than 50 ppm and a total potassium content of no more than 20 ppm. These polyesters have good color and good thermal stability and are essentially free of char material which can lead to unacceptable molded and extruded articles.

REFERENCES:
patent: 3637595 (1972-01-01), Cottis et al.
patent: 4107143 (1978-08-01), Inata et al.
patent: 4436894 (1984-03-01), Urasaki et al.
patent: 4447593 (1984-05-01), Funakoshi et al.
patent: 4563508 (1986-01-01), Cottis et al.
patent: 4639504 (1987-01-01), Cottis
patent: 4742149 (1988-05-01), Finestone
Article from Journal of Applied Polymer Science, vol. II, Issue No. 5 (1959), pp. 198-202 entitled "Polyesters of Hydroxybenzoic Acids".

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