Phenol-formaldehyde resins containing reduced quantities of 2-fu

Details Phenol-formaldehyde resins containing reduced quantities of 2-fu Phenol-formaldehyde resins containing reduced quantities of 2-fu

1987-02-18

1988-07-05

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523466, 523468, 525481, 525507, C08L 6210, C08L 6302, C08K 706

Patent

active

047555432

ABSTRACT:
Phenol-aldehyde novolac resins having reduced quantities of 2-functional material are prepared by removing all or part of the 2-functional material from this product resulting from reacting phenol with an aldehyde. Epoxy novolac resins prepared from the novolac resin containing less 2-functional product exhibit increased Tg values when cured.

REFERENCES:
patent: 4611036 (1986-09-01), Sekiguchi et al.
patent: 4649188 (1987-03-01), Bertram et al.
Lee et al.; Handbook of Epoxy Resins; McGraw Hill Book Co.; 1967; pp. 2-10, 2-11, 11-14, 11-15.
Quatrex; Dow Chemical Co.; Form No. 296-598-85.

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