Method for modifying the properties of an aqueous suspension
US9617503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2010 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Feb 3, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for modifying the properties of a suspension of solid or liquid particles in an aqueous medium, includes the step of adding to the suspension or to the aqueous medium a polymer prepared by inverse emulsion polymerization of monomers Ab, comprising a betaine group, and of nonionic monomers Ba included in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase, wherein the molar ratio of the monomers Ab to the monomers Ba is from about 4/96 to about 40/60, the polymer exhibits an intrinsic viscosity of greater than 600 mL/g, the reduced specific viscosity being measured by dissolving the polymer in a 20% by weight aqueous NaCl solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.