Process for preparing hydrolytically stable poly (ethylene-2,6-n

Details Process for preparing hydrolytically stable poly (ethylene-2,6-n Process for preparing hydrolytically stable poly (ethylene-2,6-n

1993-07-26

1994-06-14

Acquah, Samuel A.

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...

528272, 528275, 528298, 528308, 524788, C08K 310

Patent

active

053210743

ABSTRACT:
The present invention relates to a process for preparing poly(ethylene-2,6-naphthalene dicarboxylate) polymers wherein a low concentrations of an alkali metal salt is present. More specifically, 15 ppm to 100 ppm of an alkali metal derived from an alkali metal salt is added in the melt polymerization reaction mixture during formation of such polymers. The polymers are useful in applications where improved hydrolytic stability at elevated temperatures and high humidity (>50% relative humidity) are required.

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patent: 4357461 (1982-11-01), Go et al.
patent: 4732799 (1988-03-01), Sakamoto et al.
patent: 4812360 (1989-03-01), Utsumi
patent: 5017680 (1991-05-01), Sublett
patent: 5106694 (1992-04-01), Sublett

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