Trichlorosilyl groups containing organochlorosilanes and their preparation methods by the double-silylation of olefins with trichlorosilane
申请人:KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
公开号:US20040082803A1
公开(公告)日:2004-04-29
The present invention provides organosilicon compounds containing two trichlorosilyl groups and their preparation methods. Organosilicon compounds of formula II are prepared by reacting linear chain or cyclic olefins of formula I with trichlorosilane in the presence of quaternary organophosphonium salt as a catalyst.
R
1
—HC═CH—R
2
(I)
1
In formulas I and II, R
1
and R
2
may be identical or different and represent a hydrogen atom, a linear or a cyclic C
1
-C
8
alkyl, a linear or a cyclic C
1
-C
8
alkenyl, benzyl, phenyl, a C
1
-C
8
alkyl substituted phenyl group, two functional groups between R
1
and R
2
may be covalently bonded to form a C
4
-C
8
ring with or without a carbon-carbon double bond.
Processes for manufacturing organochlorosilanes and dipodal silanes and silanes made thereby
申请人:Janeiro A. Benigno
公开号:US20050027138A1
公开(公告)日:2005-02-03
Processes are provided for producing organchlorosilanes and dipodal silanes in which an organic halide or alkene or chloralkene is reacted with a hydridochlorosilane in the presence of a quarternary phosphonium salt catalyst by providing sufficient heat to effect a dehydrohalogenative coupling reaction and/or a hydrosilylation reaction and venting the reaction to control reaction pressure and to remove gaseous byproducts from the reaction. The processes are preferably continuous using a catalyst in fluid form at reaction pressures not exceeding about 600 psi. The reactions may be carried out substantially isothermally and/or isobarically, for example in a plug flow reactor or continuous stirred tank reactor. The processes may produce novel silylated compounds including 1,2-bis(trichlorosilyl)decane or 1,2-bis(trimethoxysilyl)decane.
Enhanced Hydrolytic Stability of Siliceous Surfaces Modified with Pendant Dipodal Silanes
作者:Barry Arkles、Youlin Pan、Gerald L. Larson、Mani Singh
DOI:10.1002/chem.201402757
日期:2014.7.21
The stability of surfaces in aqueous environments prepared from dipodalsilanes with hydrophobic alkyl functionality is compared to the stability of similar surfaces prepared from the conventional silanes. In strongly acidic and brine environments, surfacesmodified with dipodalsilanes demonstrate markedly improved resistance to hydrolysis compared to surfaces prepared from conventional silanes. Pendant
双足硅烷具有两个可以共价键合到表面的硅原子。与通常用于表面改性的传统硅烷相比,它们在保持表面涂层、粘合剂底漆和复合材料在水性环境中的完整性方面具有明显的优势。引入了新的非功能性和功能性双足硅烷,其结构包含“侧链”而非“桥连”有机官能团。将由具有疏水性烷基官能团的双足硅烷制备的表面在水性环境中的稳定性与由常规硅烷制备的类似表面的稳定性进行比较。在强酸性和盐水环境中,与由传统硅烷制备的表面相比,用双足硅烷改性的表面显示出显着提高的耐水解性。悬垂双足硅烷比桥连双足硅烷表现出更高的稳定性。通过二硅氧烷键的水解形成硅烷醇物质的表观平衡常数被确定为K c =[SiOH] 2 /[Si-O-Si][H 2 O]=6±1×10 -5有助于理解双足硅烷改性表面的水解稳定性增强。