Process for preparing elastomeric polyurethane or polyurethane-urea polymers, and polyurethanes so prepared
US5106874A · kind A · utility
70Cited by
3References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Jun 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2380/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is disclosed for preparing a polyurethane or polyurea elastomer by reacting in a closed mold a reaction mixture comprising a polyisocyanate and a relatively high equivalent weight polyether. The process is characterized by employing as said polyether a polymer or copolymer of propylene oxide having at least two hydroxyl groups per molecule, an equivalent weight from about 1000 to about 5000 and a monofunctional species content of about 0.04 milliequivalents/gram of polymer or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.