Glycidylethers of fluorene-containing bisphenols
AssigneeMinnesota Mining and Manufacturing Company
InventorWilliam J. Schultz
Life of this patent
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Abstract
Diglycidyl ethers of ortho-substituted-4-hydroxyphenylfluorenes, curable compositions comprising the diglycidyl ethers, and cured resins thereof have a high glass transition and an improved modulus of elasticity. The diglycidyl ethers of the invention for use in the curable composition of the invention can be mixtures obtained by the reaction of epihalohydrin with mixtures of fluorenebisphenols obtained by the reaction of one mole of one or more fluorenones with two or more moles or mixtures of two or more ortho-substituted phenols. The compositions are useful in molding and coating applications and in composite articles where the operating temperature of the article or material is elevated.
Claims14
Glycidyl ethers of ortho-substituted-4-hydroxyphenylfluorenes.
A curable epoxy resin composition comprising
- (a) at least one curable epoxy resin of which at least 25 percent by weight is a glycidyl ether of an ortho-substituted-4-hydroxyphenylfluorene;
- and
- (b) epoxy resin curatives.
A method comprising the steps:
- (a) condensing at least one ortho-substituted phenol and optionally an unsubstituted phenol with fluorenone or a substituted fluorenone to provide at least one ortho-substituted bisphenol,
- (b) reacting the resulting ortho-substituted bisphenol with an excess of epichlorohydrin to provide at least one diglycidyl ether of 9,9-bis (ortho-substituted-4-hydroxy-phenyl)fluorene, and
- (c) isolating the resulting at least one diglycidyl ether of 9,9-bis (ortho-substituted-4-hydroxyphenyl)fluorene.
Dependencies are inferred from the claim text.