Optimized process for inert fluorinated silanes
US5453528A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved method for preparing a fluorinated silane having the formula EQU R.sup.1.sub.4 Si (I) or the formula EQU R.sup.2.sub.3 Si(R.sup.3 SiR.sup.4.sub.2).sub.z R.sup.3 SiR.sup.2.sub.3(II) said method comprising reacting the corresponding halide-functional or alkoxy-functional silane with lithium aluminum hydride or sodium borohydride to form a hydride-functional silane and then reacting the latter with a vinyl-terminated fluorotelomer or an allyl-terminated fluorotelomer, wherein at least three R.sub.1 of said silane (I), at least two of the R.sup.2 and at least one R.sup.4 of said silane (II) are selected from derivatives of fluorotelomers or fluorocotelomers, z has an average value of 0 to 4 and R.sup.3 is a derivative of an alkylene-terminated telechelic divalent telomer or cotelomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.