Ciba-geigy Corporation

Bryan Dobinson

Michael R Thoseby

Christopher M Andrews

William M Rolfe

Heinz Abel

George E Green

Bernard Peter Stark

Kenneth Winterbottom

Melvin Harris

Mark R Southcott

A process for the production of glycidyl ether of an aliphatic, cycloaliphatic or araliphatic primary or secondary alcohol, comprising:

Glycidyl ether from alcohol and epichlorohydrin

The new compound N,N,N'N'-tetraglycidyl-3,3'-diethyl-4,4'-diaminodiphenylmethane and curable resin compositions containing it.

N-glycidyl compound

A process for the production of a material having an increased molecular weight relative to the diepoxide starting material the material being either a hydroxy-terminated or an epoxy-terminated material comprising

Production of compounds

A compound having the formula (I): ##STR1## in which n is an integer ranging from 2 to 6; X is the residue of an optionally substituted primary or secondary aliphatic or cycloaliphatic polyol of formula II:

Polyglycidyl compounds

A polyimide-forming composition comprising

Polyimide-forming compositions

Aromatic N-glycidylamines are prepared by treatment of an amine having at least one, and preferably two or more aromatic amino hydrogen atoms, with epichlorohydrin in the presence, as catalyst, of a di- or higher-valent metal salt of nitric or perchloric acid, or of a carboxylic or sulphonic acid substituted by fluorine, chlorine or bromine on the carbon atom alpha to the carboxylic or sulphonic acid group, and dehydrochlorinating the product. The presence of the metal salt gives a product having a higher glycidyl content and a lower viscosity than does the same reaction in the absence of such a salt. Suitable aromatic amines include aniline, phenylene diamines, phenylene diamines substituted on the aromatic ring and bis(4-aminophenyl)methane. The metal salt may be of, for example, magnesium, calcium, zinc, manganese, nickel, iron, lanthanum, vanadium, ytterbium or uranium.

Preparation of N-glycidyl compounds

To accelerate the curing of an epoxide resin by means of an aromatic or cycloaliphatic polyamine there is incorporated magnesium, calcium, zinc, manganese, cobalt, or nickel perchlorate. Typically, from 0.2 to 2 parts by weight of the perchlorate is used per 100 parts of the combined weights of the epoxide resin and the polyamine.

Curable epoxide resin compositions

A process for finishing keratinous material, especially rendering it shrink-resistant or imparting to it durably pressed effects, comprises

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Duxford, United Kingdom

Bryan Dobinson