High molecular weight ortho cresol-novolak resins and process fo

Details High molecular weight ortho cresol-novolak resins and process fo High molecular weight ortho cresol-novolak resins and process fo

1987-05-13

1989-10-24

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528144, C08G 812

Patent

active

048763241

ABSTRACT:
Orthocresol or a mixture of orthocresol and paracresol and an aldehyde compound or a derivative thereof are subjected to polycondensation in a solvent selected from an aliphatic alcohol having 3 to 12 carbon atoms, a glycol ether having 3 to 6 carbon atoms, benzyl alcohol and an aliphatic carboxylic acid having 2 to 6 carbon atoms, in the presence of an acid catalyst, to obtain linear and high molecular weight orthocresol-novolak resins or orthocresol/paracresol random copolymerized novolak resins which have a high softening point of 145.degree. C. or higher and a high number average molecular weight of 1500 or more and which are highly soluble in alcohols and ketones and are highly compatible with resins.

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F. S. Granger, Industrial and Engineering Chemistry, 29, 860-866 (1937).
R. F. Hunter, V. Vand, Journal of Applied Chemistry, (London), 1, 298 (1951).

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