Process for reacting a phenol with an epoxy compound
AssigneeShell Oil Company
InventorThomas F. Brownscombe
Life of this patent
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Abstract
The instant invention provide a process for increasing the molecular weight of an epoxy resin by reacting (1) a polyepoxide containing more than one vicinal epoxy group in the molecule, preferably a normally liquid polyether of a polyhydric phenol, (2) a polyhydric phenol, (3) a catalytic amount of an alkali metal or alkaline earth metal salt of a non-nucleophilic acid, especially fluoboric acid and perchloric acid, preferably in the presence of (4) a base such as pyridine.
Claims9
A process for increasing the molecular weight of an epoxy compound which comprises reacting (1) an epoxy compound containing at least one vicinal epoxy group in the molecule with (2) a polyhydric phenol, in the presence of (3) a catalytic amount of a lithium or calcium salt of a non-nucleophilic acid selected from the group consisting of fluoroboric acid and perchloric acid in the presence of (4) a base.
Dependencies are inferred from the claim text.