Carboxylic acid dianhydrides based on trimellitic anhydride

Details Carboxylic acid dianhydrides based on trimellitic anhydride Carboxylic acid dianhydrides based on trimellitic anhydride

1979-07-16

1981-08-25

Schwartz, Richard A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260 304EP, 548310, 548312, C07D40514

Patent

active

042860970

ABSTRACT:
Novel carboxylic acid dianhydrides are obtained by esterifying or trans-esterifying hydantoindiols, or diesters thereof, of the formula ##STR1## in which m and n are each a number from 1 to 4 and R.sub.1 and R.sub.2 are each an alkyl having 1 to 5 C atoms, or R.sub.1 and R.sub.2 together are the pentamethylene radical, R.sub.3 is a hydrogen atom or methyl and R.sub.4 is a hydrogen atom, acetyl or propionyl, with trimellitic anhydride.
The novel dianhydrides are valuable curing agents for epoxide resins and are suitable for the preparation of polymers which are derived from carboxylic acid dianhydrides.

REFERENCES:
patent: 3293248 (1966-12-01), Sheffer
patent: 3631221 (1971-12-01), Batzer et al.
patent: 4016330 (1977-04-01), Laganis
patent: 4126619 (1978-11-01), Darms et al.
Sorenson, W., et al., Preparative Methods of Polymer Chemistry, Interscience, New York, 1968, pp. 153, 157, 158.
March, J., Advanced Organic Chemistry, McGraw Hill, New York, 1968, p. 320.
Loncrini, D., J. Polymer Sci., A-1, 4, 1531 (1966).
Porret, D., et al., Helv. Chim. Acta, 54(6), 1695 (1971).

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