Aqueous dispersion of a particulate high molecular weight anionic or nonionic polymer
US6265477A · kind A · utility
23Cited by
4References
12Claims
0Family size
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Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous dispersion of a particulate high molecular weight water soluble anionic or nonionic polymer is prepared by polymerizing 0-7 mole percent of at least one anionic monomer and 100-93 mole percent of at least one non-ionic monomer under free radical forming conditions in an aqueous solution of a water-soluble salt at a pH greater than 5 in the presence of an anionic water soluble stabilizer polymer containing from about 1.25 to about 20 mole percent 2-acrylamido-2-methyl-l-propanesulfonic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.