Thermoplastic polyurethane article treated with iodine for antibacterial use
US4381380A · kind A · utility
95Cited by
13References
18Claims
0Family size
Inventors
Key dates
| Filing date | Nov 3, 1980 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Nov 3, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/905
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is provided a polymeric bacteriocidal composition comprising a thermoplastic, partially cross-linked polyurethane having --NH--(C.dbd.O)--O-- urethane linkages and/or urea linkages --NH--(C.dbd.O)--NH-- and iodine complexed with a sufficient number of these linkages to provide bacteriocidal properties to said composition. The polyurethane has an average molecular weight between 35,000 and 50,000, an ultimate elongation of 200 to 800% and a Shore A scale hardness of 60 to 95. The composition is shaped into a conventional medical appliance form, e.g. a catheter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.