High standard viscosity quaternary Mannich microemulsions
US6037406A · kind A · utility
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5References
13Claims
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Key dates
| Filing date | Jun 4, 1996 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Jun 4, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Inverse microemulsions having a Standard Viscosity of at least about 3.3 cps are disclosed which comprise an aqueous phase of dispersed micelles containing water and an (alk)acrylamide-based polymer substituted with at least 1 mole percent of quaternized tertiary aminomethyl groups, wherein said microemulsion is derived from a microemulsion containing greater than about 20 percent, by weight, and less than about 40 percent, by weight, of aqueous phase polymer solids, based on said microemulsion. A method of making said microemulsions and use thereof to dewater dispersions of suspended solids are also taught.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.