Urethane oligomers and polyurethanes
US5175231A · kind A · utility
31Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1992 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Apr 17, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G71/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A urethane is formed in a new way, without requiring the use of isocyanates. The urethane is formed by reacting a compound containing a plurality of cyclocarbonate groups with a diamine in which the two amine groups have different reactivities with cyclocarbonate, so as to form a urethane oligomer with amine end groups. The urethane oligomer can then be reacted in several different ways to form polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.