Zwitterion terpolymers of a vinyl lactam, an amino alkyl acrylamide or acrylate, and a polymerizable carboxylic acid
US5045617A · kind A · utility
15Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F226/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The terpolymers of the invention: PA0 (a) a vinyl lactam, such as vinyl pyrrolidone or vinyl caprolactam; PA0 (b) an amino alkyl acrylamide or acrylate, such as dimethylaminopropyl methacrylamide or dimethylaminoethyl methacrylate; and PA0 (c) a polymerizable carboxylic acid, such as acrylic acid or methacrylic acid. The zwitterion terpolymers of the invention are made from the terpolymers by internal transfer of the proton of the carboxylic acid to the amino group of the acrylamide or acrylate monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.