Incorporating an asymmetrical siloxane into a composition in need of hydrolysis resistance
US7968666B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jan 29, 2010 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Jan 29, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An asymmetric siloxane is made by reacting a silicone having the formula MHDxM′H where MH is R1R2HSiO1/2, M′H is R4R5HSiO1/2 and x is an integer 0≦x≦10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound. The formed asymmetric siloxane is incorporated into a composition in need of hydrolysis resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.