Product of and process for polymerizing an aqueous reaction mixture containing ionizing agent and cosolvent that forms an aqueous dispersion of resinous polyelectrolyte
US4218356A · kind A · utility
7Cited by
18References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 24, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Oct 24, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A resinous copolymer polyelectrolyte product is produced by a process for addition polymerization of reactants having from about 0.0005 to 0.0050 neutralization equivalents of ionizable monomer per gram. The aqueous reaction mixture for polymerization contains both a cosolvent in proportions low enough to avoid formation of a solution of the polyelectrolyte in the final aqueous medium and an ionizing agent sufficient to ionize at least about 0.0001 neutralization equivalent of said ionizable monomer. The polyelectrolyte has a mean weight average not substantially in excess of 100,000 molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.