Polyurethane elastomer for heart assist devices
US4131604A · kind A · utility
71Cited by
16References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Nov 23, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/73
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rubbery reaction products of an aliphatic organic diisocyanate, a high molecular weight polyether polyol (poly tetra methylene ether glycol), a low molecular weight glycol chain extender and a polyhydic alcohol crossliker such as trimethylol propane. The resulting polymers have improved thromboresistant properties and a long flexural life. Bladders for heart pumps may be formed from the resulting polymer, and a novel process for forming bladders for heart pumps is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.