Redispersible polymer powder mixtures for use in dry-mix formulations
US9212280B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 13, 2013 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Sep 13, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/70
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A mixture of first and second redispersible polymer powders where the first redispersible polymer powder has a copolymer having a glass transition temperature of 60 degrees Celsius or higher and an acid level in a range of 0.1 to 8 weight-percent percent as determined by potentiometric titration according to ASTM D664 and the second redispersible polymer powder is selected from vinyl acetate ethylene copolymer redispersible polymer powders and polymer powders of a blend of vinyl acetate ethylene copolymer and vinyl ester of versatic acid copolymer is useful as a component in a dry-mix formulation that further contains Portland cement, alumina rich cement and calcium sulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.