Curable mixtures containing epoxy resins and isomelamines
US4537946A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/5086
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.