Vinyl functional silane

In this context, we here describe the synthesis and reaction behavior of the pentacoordinated vinyl-functionalized silane (2-Me2NCH2C6H4)(CH=CH2)Si(H)2. 

Vinyl functional silanes have been used for over 35 years to crosslink polyethylene. The most common commercial products using this crosslinking technology are crosslinked PE insulations for the global wire and cable market [11] and crosslinked HDPE pipes for potable water and natural gas. Some work recently has been done to combine this crosslinking technology with wood-filled polyethylene. 

SOcat, Modified vinyl functional silanes, Witco Cotp., OrganoSihcones... 

Vinyl functional silane (Dow-Coming z6032), 40% solution in methanol 338 g/mol N/A... 

In PE/aluminium laminates, which are used for packaging, the bond strength can be improved by surface oxidation of the polymer. An alternative to surface oxidation is to use copolymers of ethylene and monomers containing polar groups that can provide stronger bonds to metal thus increasing adhesion [24,25]. The effects of three functional groups in ethylene copolymers, namely EVS [polyethylene-co-vinyl trimethoxy silane], EBA [polyethylene-co-butyl acrylate], EAA [polyethylene-co-acrylic acid) on the adhesion was studied [25]. The interface in polymer/metal laminates has been analysed by FT-IR... 

The formulator or the chemist can choose among a large variety of functional silanes with the triethoxysilanol function on one end, the substituents at the other end (Y in Eqs. 1 and 2) can be alkyl, alkylene oxide, isocyanurate, mercapto, polysulfide, amino, ureido, epoxy, isocyanato, vinyl, or methacrylic groups. 

Other vinyl esters and other monomers (e.g., acrylates and methacrylates, or ethylene and vinyl silanes) can also be copolymerized with vinyl-functional silicones. The introduction of chemical functions (e.g., carboxyl groups) and charged groups is possible in order to further improve the properties. 

Silanes can be polymerized into the backbone of a polymer during its synthesis [6]. Emulsion polymerization of methacryloxyalkyl or vinyl functional organosilanes has been shown to be a particularly useful method of incorporating a crosslinking silane into a waterborne system. Subsequent to reaction of the methacryl or vinyl functionality, the alkoxy groups are left available either to react with a substrate or filler, or to crosslink upon film formation. 

In addition to the head-to-tail hydrosilylation described above we could show that monomeric vinyl-functionalized hypervalent silanes can be used for the preparation of polycarbosilanes containing silicon atoms in a trigonal-bipyramidal environment [7b, 8] Treatment of... 

Modern electron processors offer high speed (high dose-rate) curing of low viscosity liquid coatings so that surface modification of films becomes practicable. A process has been developed for grafting vinyl monomers to polyolefin film surfaces with the aid of functional silane primers using electron initiated polymerization. 

The surface primer was prepared as a 40% methanol solution of a vinyl benzyl amine functional silane (Dow Corning Corporation Z-6032) by slowly adding methanol and then water. The mixture was allowed to stand for 24 hours to hydrolyze the silane and allow the low molecular weight oligomers to form. Samples of low density polyethylene (LDPE) film. 005" thick, supplied by U. S. Industrial Chemical Company (Resin NA140-00 containing no antioxidants) were prepared for use as the oleflnlc substrate. 

Chem. Descrip. Waterborne silane with vinyl functionality Uses Coupling agent in mineral surface treatment, acrylic coatings and caulks, antifreeze systems, and metal primers Properties Completely sol. in water dens. 1.1 g/ml vise. 7-9 mPa-S f.p. 

On the basis of all the experiments with vinyl-substituted silanes and siloxanes with heteroatom-functionalized alkenes, catalyzed by ruthenium complexes, we were able to propose general synthetic routes. The reaction of vinyl-substituted silanes with vinyl-substituted heteroorganic (N,0,S) compounds proceeds effectively and yields, under optimum conditions (usually a five-fold excess of alkene 80-110 °C) and in the presence of ruthenium complexes containing or generating Ru-H and/or Ru-Si bonds, l-silyl-2-N(0 or S)-substituted ethenes with a high preference for the -isomer, according to Eq. 4, where R3 = Mea, Me2Ph, or (OEt)3. 

Silquest A-2171 offers vinyl and silane functionality making it suitable for crosslinking of organic polymers. It is also useful as a crosslinker in systems where greater elongation is required. It is also recommended for chain extension of RTV silicones or other silane or HO functional polymers. The resulting Si-O-Si crosslinked sites are resistant to exposure to moisture, chemicals, and UV. Siloxane crosslinkers tend not to generate color and are resistant to environmental factors such as acid rain. 

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