Acrylic latex binder and method of preparation
US9273221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2014 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Jan 31, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D133/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process comprising contacting methyl methacrylate or styrene; a C1-C10-alkyl acrylate; and a polymerizable carboxylic acid monomer with a stable aqueous dispersion of first polymer particles, under emulsion polymerization conditions, to form a stable aqueous dispersion of second polymer particles. The first polymer particles have a Tg in the range of from −30° C. to 30° C., and the monomers have a calculated Tg in the range of 50° C. to 120° C. The present invention also relates to the dispersion of second polymer particles, which is useful as a binder to improve freeze-thaw stability in a coatings formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.