Preparation of N-(aminomethyl)-.alpha.,.beta.-ethylenically unsaturated carboxamides and their polymers
US4166828A · kind A · utility
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6Claims
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Key dates
| Filing date | Dec 2, 1977 |
| Grant date | Sep 4, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N-(aminomethyl)-.alpha.,.beta.-ethylenically unsaturated carboxamides such as N-(dimethylaminomethyl)acrylamide are readily prepared without coincident production of saturated impurities by reacting an .alpha.,.beta.-ethylenically unsaturated carboxamide such as acrylamide with a lower aldehyde such as formaldehyde and a secondary amine such as dimethylamine at a pH below 7. The resulting aminomethyl carboxamides are polymerized at a pH of 7 or less to form polymers containing essentially no gelled product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.