Process for making epoxy novolac resins with high epoxy values

Details Process for making epoxy novolac resins with high epoxy values Process for making epoxy novolac resins with high epoxy values

1983-09-08

1985-05-21

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528106, 528 86, 528 87, 528110, 523400, 523401, 523402, 549517, C08G 5940, C08G 5900

Patent

active

045187622

ABSTRACT:
An improved process for making glycidyl ethers of novolac resins, particularly cresol and phenol novolacs, by reaction of the novolac with a solid alkali metal hydroxide in excess epichlorohydrin and in the presence of an alcohol cosolvent where the reaction mixture contains a small amount of water, wherein the improvement comprises carrying out the etherification and dehydrochlorination in a combined one step process, in the absence of a catalyst specific for chlorohydrin formation, and using the solid alkali metal hydroxide in the form of tiny beads.

REFERENCES:
patent: 2840541 (1958-06-01), Pezzaglia
patent: 2848435 (1958-08-01), Griffin et al.
patent: 2943096 (1960-06-01), Reinking
patent: 2995583 (1961-08-01), Larkin et al.
patent: 3336342 (1967-08-01), Frank et al.
patent: 3372142 (1968-05-01), Smith
patent: 3766221 (1973-10-01), Becker
patent: 3980679 (1976-09-01), Becker

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