Latent catalysts for promoting reaction of epoxides with phenols

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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568609, 568637, 568638, 260 18EP, 2606065F, 260836, 260837R, 560209, 528 99, 528112, 528104, 528365, C08L 6300

Patent

active

041327063

ABSTRACT:
The trisubstituted (2,5-dihydroxyphenyl)phosphonium hydroxide inner salts and their hydrolyzed derivatives are novel latent catalysts for promoting reaction between vicinal epoxides and phenols and/or carboxylic acids (or anhydrides). Precatalyzed epoxy resins are easily prepared using such catalysts.

REFERENCES:
patent: 3477990 (1969-11-01), Dante et al.
J. Am. Chem. Soc., vol. 78 Romirez et al., 11/1956 (pp. 5614-5622).

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