Curable compositions containing epoxidized phenolformaldehyde re

Details Curable compositions containing epoxidized phenolformaldehyde re Curable compositions containing epoxidized phenolformaldehyde re

1989-11-17

1992-01-07

Michl, Paul R.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528499, 528165, 528500, 528493, 528494, 528495, 528496, C08G 5932, C08G 804

Patent

active

050793144

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: 1683702 (1928-09-01), Seebach
patent: 3928288 (1975-12-01), Walker
patent: 4259464 (1981-03-01), Buriks et al.
patent: 4468507 (1984-08-01), Parker
patent: 4649188 (1987-03-01), Bertram et al.
patent: 4755543 (1988-07-01), Bertram et al.
patent: 4965324 (1990-10-01), Bertram et al.

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