Process for producing polyurethane/urea elastomers
US4722989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1987 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Mar 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a solvent-free process for producing polyurethane/urea elastomers wherein an aromatic diisocyanate is reacted with a compound having active Zerewitinoff hydrogen atoms and an aromatic diamine chain extender. The improvement for producing urethanes having a wide range of properties comprises including a urethane-linked diisocyanate in the polyurethane urea elastomer. The urethane-linked diisocyanate is one that is formed by reacting toluenediisocyanate or substituent thereof with a short chain diol under conditions such that the urethane linked diisocyanate comprises two equivalents isocyanate per equivalent diol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.