US 4,623,701 A · Multifunctional epoxy resins

Abstract

Multifunctional epoxy resins are prepared by reacting (1) a polyglycidyl ether of a polyhydroxyl-containing material said glycidyl ether having an average of at least 0.05 aliphatic hydroxyl group per molecule and an average of more than one glycidyl ether group per molecule such as a diglycidyl ether of bisphenol A, (2) a hydrolyzed monoglycidyl ether of a material having one aromatic hydroxyl group such as hydrolyzed phenyl glycidyl ether or one aliphatic hydroxyl group such as hydrolyzed butyl glycidyl ether, (3) a hydrolyzed glycidyl ether of a material having an average of more than one aromatic hydroxyl group per molecule such as hydrolyzed diglycidyl ether of bisphenol A or an average of more than one aliphatic hydroxyl group per molecule such as hydrolyzed cyclohexanedimethanol diglycidyl ether, (4) the reaction product of monoglycidyl ether with a polyphenolic compound, or (5) a combination of (1), (2), (3) or (4) with an epihalohydrin such as epichlorohydrin and dehydrohalogenating the resultant halohydrin ether intermediate product with a suitable dehydrohalogenating agent such as sodium hydroxide. These epoxy resins when cured with a suitable curing agent such as methylene dianiline result in an improvement in one or more properties such as toughness, heat distortion temperature, glass transition temperature, acid resistance or the like.

Claims55

Dependent claims

A multifunctional epoxy resin obtained by dehydrohalogenating the reaction product of (A) an epihalohydrin with (B) at least one material selected from those materials represented by the following formulas VI-IX ##STR7## wherein each A is independently the residue which would remain if the hydroxyl groups of a material having two hydroxyl groups were removed;

A' is the residue which would result if the hydroxyl groups of a material having from 2 to about 10 aromatic hydroxyl groups were removed;
A" is a monovalent hydrocarbyl group having from 1 to about 20 carbon atoms;
each R is independently hydrogen or an alkyl group having from 1 to about 4 carbon atoms;
R.sup.1 is an aliphatic or aromatic or alkyl or halogen substituted aliphatic or aromatic hydrocarbon group;
n has an average value of from about 0.5 to about 150 and n' has a value from 2 to about 10.

2 more elements

Dependencies are inferred from the claim text.

Multifunctional epoxy resins

Life of this patent

Multifunctional epoxy resins

Life of this patent

Abstract

Claims55