Thermoplastic polyurethanes with high glass transition temperatures
US4822827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are novel high flexural modulus polyurethane plastics wherein a polyisocyanate and a particular combination of extenders including cycloalkane diol are reacted optionally in the presence of a minor proportion of high molecular weight polyol. The polymers have outstanding resistance to high temperatures thereby expanding their utilities into higher temperature end-use environments than related prior art materials. Certain members of these new polymers are also possessed of outstanding optical clarity which thereby provides a combination of properties heretofore not available in a polyurethane. These polymers are easily melt-fabricated notwithstanding their inherent high temperature properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.