Method for preparation of a stable polymer dispersion with colloidal silica particles
US10040921B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jul 4, 2014 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Aug 10, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of preparing a polymer dispersion comprising (i) contacting an aqueous dispersion of de-ionized acidic colloidal silica particles with a first mixture of monomers to form a combination; (ii) polymerizing such combination at an initial pH of from 2 to 5 to at least 90% in completion; and (iii) adding a second mixture of monomers at a rate substantially equal to the rate of consumption of such second mixture of monomers to continue and complete the polymerization. The present invention further provides a polymer dispersion made from the above method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.