Radiopaque polyurethanes
US5346981A · kind A · utility
46Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Jan 13, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/6633
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to radiopaque polyurethane compositions that are reaction products of PA1 (a) cycloaliphatic diisocyanates; PA1 (b) at least one polyester, polycarbonate, and/or polyester carbonate diol having a molecular weight of from about 1000 to about 6000; PA1 (c) an isocyanate-reactive bromine-containing aromatic chain extender; and PA1 (d) optionally, a catalyst; wherein the quantity of component (c) is such that the amount of bromine in the polyurethane composition is from 10 to 35% by weight, and wherein the components are reacted at an isocyanate index of from 0.95 to 1.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.