Olefinic siloxanes as platinum inhibitors
US3989667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Dec 2, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Olefinic siloxanes which are inhibitors for platinum catalyst can be made by the reaction of secondary or tertiary acetylenic alcohols with siloxanes having silicon-bonded-hydrogen atoms. These olefinic siloxanes inhibit the platinum catalyst such that it will not catalyze the addition of SiH to aliphatic unsaturation at room temperature and does not inhibit the reaction at elevated temperatures. These olefinic siloxanes contain from 3 to 10 siloxane units with a total of at least three units from at least one RHSiO and/or R.sub.2 HSiO.sub.0..sub.5, at least one ##EQU1## and the remaining siloxane units being ##EQU2## PAC R.sub.3 SiO.sub.0..sub.5, SiO.sub.2 or RSiO.sub.1..sub.5 but no more than three units of any one of these siloxane units. An example of such an olefinic siloxane is
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.