Emulsion polymers and stain resistant coating compositions made therefrom
US11059980B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Feb 14, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J143/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Emulsion polymers and coating compositions made therefrom that exhibit exceptional stain resistance to both hydrophilic and hydrophobic stains. The emulsion polymers include, as polymerized units: a) at least one ethylenically unsaturated nonionic monomer in an amount ranging between about 85 wt. % to less than 100 wt. % based on the overall weight of the polymer composition; b) a first acid monomer in an amount ranging from about 0.1 to 2 wt. %, the first monomer being a strong acid monomer selected as a phosphorus-based acid monomer, a sulfur-based acid monomer, or a mixture thereof, and c) a second acid monomer in an amount ranging from about 0.1 to 2 wt. %, the second monomer being one or more ethylenically unsaturated monomers having at least one carboxyl or carboxylic anhydride functional group. The relative amounts of the first and second acid monomers are such that the ratio of b/c is greater than 0.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.