Coating composition comprising self-crosslinkable core-shell particles and imparting improved stain resistance
US11111409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2019 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Jul 19, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A coating composition includes: an aqueous dispersion of self-crosslinkable core-shell particles, where the core-shell particles include (1) a polymeric core at least partially encapsulated by (2) a polymeric shell having urethane linkages, keto and/or aldo functional groups, and hydrazide functional groups, where the polymeric core is covalently bonded to at least a portion of the polymeric shell, and a hydrophobic additive including a wax and/or a silicon-containing compound, where the hydrophobic additive is non-reactive with the polymeric core and the polymeric shell. A substrate coated with a coating formed from the coating composition and a method for improving stain resistance of a substrate are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.