Acrylic amphoteric polymers
US4749762A · kind A · utility
12Cited by
16References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1982 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | May 12, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Amphoteric polymers prepared by polymerization of (a) acrylic acid, (b) N,N-dimethyl- orN,N-diethylaminoethyl methacrylate and, optionally, (c) esters of methacrylic or acrylic acid prepared by (i) emulsion polymerization of (b), (c) and the methyl ester of (a), followed by basic hydrolysis, or (ii) polymerization of (a), (b) and (c) in the presence of a strong acid, and photographic emulsions comprised of said polymers in which the molar ratio of (a) to (b) is at least 2 to 1 and a silver halide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.