Method for preparing pH-insensitive surfactant free polymer particle dispersion in aqueous medium
US9309329B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Mar 31, 2011 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Nov 11, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a polymer particle dispersion in an aqueous medium and a method of making the same, which comprises an emulsion polymerized polymer and a macroinitiator covalently bonded to the emulsion polymerized polymer. The living macroinitiator comprises a hydrophilic, pH-insensitive monomer in reacted form. The polymer particle dispersion may be obtained by reacting at least one monomer with the living macroinitiator and without a surfactant to effect polymerization of the monomer(s). The emulsion polymerized polymer may be comprised of at least one additional ethylenically unsaturated monomer in polymerized form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.