Process for the continuous preparation of polyglycidyl...

Details Process for the continuous preparation of polyglycidyl... Process for the continuous preparation of polyglycidyl...

C - Chemistry, Metallurgy

07

D

260/370.8

C07D 301/28 (2006.01) C07D 303/24 (2006.01) C08G 59/06 (2006.01)

Patent

CA 1041107

ABSTRACT OF THE DISCLOSURE Liquid epoxy resins are produced by contacting a di- hydroxy phenol with an excess of epihalohydrin and an aqueous solution of an alkali metal hydroxide in a molar ratio of hydroxide to phenol not exceeding 2:1, recovering from the reaction products an epoxy resin having a content of hydro- lyzable chlorine of from 1 to 6% by weight, contacting a solu- tion of the resin in a hydrocarbon with an aqueous solution of an alkali metal hydroxide while maintaining an atomic ratio of alkali metal to hydrolyzable chlorine contained in the resin of from 1:1 to 1.17:1 and recovering from the reaction products a liquid epoxy resin having a content of hydro- lyzable chlorine less than 0.02% by weight. These epoxy resins of high purity are particularly useful as varnishes or coatings.

227599

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