Thermoplastic polyurethane method of making same and forming a medical article therefrom
US5545708A · kind A · utility
49Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L29/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A thermoplastic polyurethane having inherent softness properties is formed from a diisocyanate, a polyetherglycol and a mixture of diol chain extenders. The mixture of chain extenders includes a first diol and a second diol which has side chain branching. A method for making the polyurethane of the present invention includes mixing the components to induce an exothermic reaction, followed by curing. The polyurethane formed is suitable for melt processing into medical devices such as catheters, other tubing, hubs and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.