AMPS copolymer emulsions with improved stability
US5185395A · kind A · utility
10Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Mar 27, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymer water-in-oil emulsions of 2-acrylamido-2-methylpropane sulphonic acid (AMPS) monomer and an anionic comonomer such as methacrylic acid are prepared with substantially less coagulum formation by means of a specific dual surfactant system. The resultant emulsions have enhanced long-term storage stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.