Method for making alkoxy-siloxane polyether carboxylates terminated with functional olefin groups
US7625991B2 · kind B2 · utility
2Cited by
39References
11Claims
0Family size
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Key dates
| Filing date | Feb 21, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jun 19, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/46
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A resin that may be used, for example, in dental impression materials, and a method of making the resin. The resin comprises an alkoxy-siloxane polyester or polyether carboxylate backbone functionalized with at least two cycloolefin groups capable of undergoing a metathesis reaction. The method of making the resin comprises reacting a hydride terminated siloxane with a polyether or polyester diol containing propylene oxide and ethylene oxide fragments, and a cycloolefinic group functionalized hydroxyalkyl carboxylic acid ester, in the presence of a Group 3 or 13 catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.