Aqueous copolymer dispersion and coating composition
US8802765B2 · kind B2 · utility
18Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Sep 9, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to an aqueous copolymer dispersion comprising an emulsion copolymer and two hydrophobic aromatic ketones, wherein the aromatic ketones are, based on the dry weight of the copolymer, from 0.1 to 3 wt % benzophenone and from 0.1 to 4 wt % a benzophenone derivative; wherein the dispersion comprises 0 or less than 0.1 wt % hydrophilic aromatic ketone. The copolymer dispersion is suitable for preparation of aqueous coating compositions which yields a relatively hard surface to provide not only short term but also long term dirt pick up resistance effects, after exposure to ultraviolet radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.