Process for producing biphenol skeleton-containing epoxy resins

Details Process for producing biphenol skeleton-containing epoxy resins Process for producing biphenol skeleton-containing epoxy resins

C - Chemistry, Metallurgy

08

G

C08G 59/06 (2006.01) C08G 59/24 (2006.01)

Patent

CA 2098678

A B S T R A C T PROCESS FOR PRODUCING BIPHENOL SKELETON-CONTAINING EPOXY RESINS A process for producing 4,4'-biphenol skeleton-containing epoxy resins, by reacting a mixture of phenols containing of from 20 to 80% by weight of 4,4'-biphenols with an epihalohydrin in a reaction medium of glycol monoethers, while gradually adding thereto an alkali metal hydroxide, said reaction being carried out in the presence of more than 6 wt%, based on the total weight of the reaction mixture of water, at least ln the initial stage of the reaction i.e. up to the moment that 0.2 mol of alkali metal hydroxyl, per mol of phenolic hydroxyl groups, has been added to the reaction mixture.

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