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US 6,646,102 B2Granted
Process for manufacturing an alpha-dihydroxy derivative and epoxy resins prepared therefrom
AssigneeDow Global Technologies LLC
InventorsClinton J. Boriack, Zeng K. Liao, Thomas H. Kalantar
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Abstract
A process for manufacturing an α-dihydroxy derivative from an aryl allyl ether wherein such α-dihydroxy derivative can be used to prepare an α-halohydrin intermediate and an epoxy resin prepared therefrom including epoxidizing an α-halohydrin intermediate produced from a halide substitution of an α-dihydroxy derivative which has been obtained by a dihydroxylation reaction of an aryl allyl ether in the presence of an oxidant or in the presence of an oxidant and a catalyst.
Claims92
A process for making an epoxy compound or resin comprising:
- (a) converting an aryl allyl ether of a phenol or mixture of phenols to an α-dihydroxy derivative of a phenol or mixture of phenols (i) in the presence of an oxidant or (ii) in the presence of an oxidant and a catalyst;
- (b) reacting the α-dihydroxy derivative prepared in step (a) with a hydrogen halide and a carboxylic acid or a carboxylic acid ester to form a phenolic-based α-halohydrin intermediate, and
- (c) converting the phenolic-based α-halohydrin intermediate prepared instep (b) to an aryl glycidyl ether of a phenol or mixture of phenols as an epoxy compound or resin.
Dependencies are inferred from the claim text.