Method of preparing epoxy resins having low hydrolyzable chlorid

Details Method of preparing epoxy resins having low hydrolyzable chlorid Method of preparing epoxy resins having low hydrolyzable chlorid

1983-04-07

1984-05-08

Nielsen, Earl A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

525507, 525523, 528 87, 528 98, 528 99, 528405, 549517, C08G 5914

Patent

active

044475985

ABSTRACT:
The hydrolyzable "chloride" contents of epoxides prepared from epihalohydrins and phenols, aromatic amines or >N-H group-containing heterocycles are considerably reduced by a second dehydrochlorination step which comprises dissolving the epoxide in a solvent having the characteristics of a 1:1 by weight blend of methylethylketone and toluene and treating it with amounts of base and water ensuring a final base concentration equivalent to that of about 4 wt. % aqueous NaOH.

REFERENCES:
patent: 4132718 (1979-01-01), Vargiu et al.
patent: 4394496 (1983-07-01), Schrader

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