Method for making polyetherimides using carboxylic acid salts of

Details Method for making polyetherimides using carboxylic acid salts of Method for making polyetherimides using carboxylic acid salts of

1980-07-11

1981-10-06

Schain, Howard E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 26, 528179, 528181, 528182, 528185, C08G 6904, C08G 7310

Patent

active

042936837

ABSTRACT:
A method is provided for enhancing the rate of formation of polyetherimides under melt or solution polymerization conditions by using either an alkali metal carboxylic acid salt, or a zinc carboxylic acid salt as a catalyst. The aforementioned catalysts are employed in a polymerization mixture of aromatic bis(ether anhydride) and an organic diamine.

REFERENCES:
patent: 3803085 (1974-04-01), Takekoshi et al.
patent: 3847867 (1974-11-01), Heath et al.
patent: 3905942 (1975-09-01), Takekoshi et al.
patent: 3983093 (1976-09-01), Williams et al.
patent: 3989670 (1976-11-01), Takekoshi et al.
patent: 4221897 (1980-09-01), Takekoshi

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