Method for making polyetherimide using a phenolic or carboxylic

Details Method for making polyetherimide using a phenolic or carboxylic Method for making polyetherimide using a phenolic or carboxylic

1980-09-19

1982-04-13

Welsh, Maurice J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G 7310

Patent

active

043248837

ABSTRACT:
A method is provided for making polyetherimide based on the use of an organic carboxylic acid or phenolic catalyst which is added in a controlled manner to a solution polymerization mixture of an organic dianhydride and organic diamine. An enhancement of the rate of polymerization is achieved if the catalyst addition is effected after at least a predetermined amount of water of reaction is separated from the mixture.

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patent: 4048142 (1977-09-01), Takekoshi
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Structural Effects on the Rates of Formation of Amic Acids and Imides, Dror et al., J. Chem. Soc., Perkin II, 1425 (1974).
NASA Tech Brief, PB80-972160, ARC-11107, Improved Imide Polymerization Catalyst.
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Preparation of Acyclic Imides, Hurd et al., J. of Org. Chem., vol. 24, pp. 388-392 (1959).
Cyclization of Aromatic Polyamido Acids to Polyimides, Lavrov et al., Chemical Abstracts, vol. 87, (1977), p. 4.
A Case History of Transmuting an Idea into Money, M. Orchin., J. of Chem. Education, p. 782.
The Preparation of Phthalamic Acids and their Conversion into Anthranilic Acids, Chapman et al., J. Chem. Soc. 127, 1791 (1925).

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