Process for preparing polyvinylamine and salts thereof
US4018826A · kind A · utility
58Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1974 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Nov 4, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Poly(vinylamine) salts of mineral acids are produced by reacting acetaldehyde and acetamide at a mole ratio of 1:2-4 with acid catalyst, cracking the ethylidene-bis-acetamide which results into vinylacetamide, polymerizing the vinylacetamide with a free radical polymerization catalyst, and hydrolyzing the poly(vinylacetamide) to the desired amine salts by contacting the polyvinylacetamide with an aqueous solution of the corresponding mineral acid. This product may be converted to the free amine, which in turn may function as a precursor in the manufacture of certain polymeric dyes and colorants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.