Aqueous urethane/acrylic resins with branched chain extension and coating compositions made therefrom
US5854332A · kind A · utility
21Cited by
20References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aqueous dispersions of urethane polymers and vinyl polymers (e.g., acrylics) that provide water-based coating compositions with good adhesion following humidity exposure are further improved by providing branching chain extension of the polyurethane. The branched polymers provide improved metallic pigment orientation in coating compositions. Branching is provided by the use of chain extending agents selected from polyamines having at least three primary amine groups and polyols having at least three hydroxyl groups. The vinyl monomers are polymerized in the presence of the aqueously dispersed polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.