Process for preparing polyarylate having high...

Details Process for preparing polyarylate having high... Process for preparing polyarylate having high...

2008-07-22

2008-07-22

Boykin, Terressa (Department: 1796)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S176000, C528S190000, C528S191000, C528S196000, C528S198000, C528S271000, C528S272000

Reexamination Certificate

active

11225885

ABSTRACT:
A process for preparing polyarylate wherein a bivalent phenol compound having the structure of Formula 1 and an aromatic dicarboxylic acid halogen compound react to prepare a polyarylate, and wherein a nonionic surface-active agent is added. This decreases residual salts and improves the transmittance and the heat-resistance. In Formula 1, R1, R2, R3 and R4 denote the same as illustrated in the description.

REFERENCES:
patent: 4992526 (1991-02-01), Wang
patent: 6753363 (2004-06-01), Harashina
patent: 6831112 (2004-12-01), Kaku et al.
patent: 5-43670 (1993-02-01), None

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