Polyurethane or polyurethane-urea aqueous dispersion, preparation method therefor, and use thereof
US11118000B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 2016 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Jul 13, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2427/006
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A self-crosslinkable polyurethane or polyurethane-urea aqueous dispersion, a preparation method therefor, and a use thereof. Side chains of the polyurethane or polyurethane-urea contain non-sterically-hindered siloxy groups. During the drying and activation of the aqueous dispersion, the siloxys in the side chains are hydrolyzed and crosslinked with each other to increase the cross-linking density, significantly improving the heat resistance, the humidity resistance, and other properties of an adhesive obtained therefrom. The aqueous dispersion itself has a good stability. In addition, an application system based thereon has an excellent stability and a long storage time. The aqueous dispersion is suitable for the preparation of high quality paints and sealants, especially adhesives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.