Aqueous polyurethane dispersions formed from polyisocyanates having a methylene bridge
US5900457A · kind A · utility
15Cited by
18References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2170/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to aqueous polyurethane dispersions and aqueous polyurethane-acrylic dispersions, especially polymer dispersions formed from norbornane diisocyanate. The dispersions, and the dried polymers therefrom, are useful adhesives that provide enhanced bond strength when subjected to increased thermal and mechanical stress. Additionally, the inventive dispersions form polymers having increased adhesion compared to similar polymers based on cycloaliphatic diisocyanates which are free of a methylene bridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.