Curable mixtures containing epoxy resins and isomelamines

Details Curable mixtures containing epoxy resins and isomelamines Curable mixtures containing epoxy resins and isomelamines

1984-11-28

1985-08-27

Nielsen, Earl

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525504, 528361, 528407, 528393, C08G 5950

Patent

active

045379467

ABSTRACT:
A novel process for the preparation of isomelamines of the formula I, ##STR1## which is characterized in that an N-cyano-N-(ar or cyclo)alkylcarboxylic acid amide or N-cyano-N-allylcarboxylic acid amide of the formula II or III ##STR2## is reacted with aqueous sodium hydroxide solution, potassium hydroxide solution or ammonia solution or a primary aliphatic or cycloaliphatic amine in a solvent or with a primary aliphatic alcohol in the presence of a catalytic amount of a basic compound in a temperature range from -20.degree. C. to 200.degree. C., at least 3 hydroxyl or amino group equivalents being used per 3 carboxylic acid amide group equivalents.
The isomelamines prepared by the process according to the invention are valuable curing agents for epoxide resins.

REFERENCES:
patent: 4393181 (1983-07-01), Allen
patent: 4486583 (1984-12-01), Takahashi et al.

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