Multistage aqueous emulsion polymer and aqueous coating composition formed therefrom
US11136428B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Apr 29, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multistage aqueous emulsion polymer comprising from 88% to 98% by dry weight, based on total dry weight of the multistage aqueous emulsion polymer, of a first polymer core; and from 2% to 12% by dry weight, based on total dry weight of the multistage aqueous emulsion polymer, of a second polymer shell, wherein the first polymer core and the second polymer shell each independently comprises, as polymerized units, one or more ethylenically unsaturated nonionic monomers, wherein the second polymer shell further comprises, as polymerized units, from 20% to 60% by dry weight, based on total dry weight of the second polymer shell, of an acid monomer, wherein said acid monomer is, as polymerized units, from 1.1% to 4.2% by dry weight, based on total dry weight of the multistage aqueous emulsion polymer. An aqueous coating composition comprising said multistage aqueous emulsion polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.