Dirt pickup resistant coating binder and coatings
US6258887A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D151/003
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multi-stage aqueous emulsion-polymer suitable for use in dirt pickup resistant coatings and coatings containing the polymer are provided. The multi-stage aqueous emulsion polymer includes (i) a first polymer including at least one nonionic copolymerized monoethylenically unsaturated monomer, from 0.5% to 7% of a copolymerized monoethylenically unsaturated ionic monomer, based on the weight of the first polymer, and from 0% to 1.0%, based on the weight of the first polymer, of a copolymerized multi-ethylenically unsaturated monomer, the first polymer having a Tg of 15.degree. C. to 105.degree. C.; and (ii) a second polymer comprising at least one nonionic copolymerized monoethylenically unsaturated monomer, from 0% to 2% of a copolymerized monoethylenically unsaturated ionic monomer, and from 0.25% to 6%, based on the weight of the second polymer, copolymerized multi-ethylenically unsaturated monomer, the second polymer having a Tg of -55.degree. C. to 30.degree. C., the second polymer having a different composition than the first copolymer, and the second polymer being from 25% to 75% of the total weight of the first polymer and the second polymer, based on dry polymer weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.