High molecular weight thermoplastic polyurethanes made from polyols having high secondary hydroxyl content
US6734273B2 · kind B2 · utility
18Cited by
8References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic polyurethane compositions are prepared from polyols having high secondary hydroxyl content, diisocyanates, chain extenders and catalysts. The resulting polyurethanes have high molecular weight and can be prepared by a one-shot process wherein the reactants and any additional desired components are brought together and reacted simultaneously or substantially simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.