Water dispersible copolymers for scavenging formaldehyde
US11549032B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Nov 14, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2800/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is a water dispersible copolymer for scavenging formaldehyde, the copolymer being based on acrylic copolymer comprising one or more acetoacetyl functional groups and one or more hydrophilic groups chemically bonded to its molecular backbone, wherein the acrylic copolymer has a number average molecular weight of 2000-100,000 g/mol; and wherein the acrylic copolymer comprises between 10 wt % and 30 wt % of the acetoacetyl functional groups relative to the weight of the acrylic copolymer. The present invention also refers to an aqueous dispersion containing said water dispersible copolymer, as well as an article coated by a coating comprising the aqueous dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.