REAXIS® C417VM, Dioctyltin Oxide + Silane, is a liquid version of dioctyltin oxide (DOTO) containing vinyltrimethoxysilane (VTMO) and is commonly used as a catalyst for silicone chemistries. As an octyltin-based catalyst, REAXIS® C417VM is a moderately active catalyst and is ideal for use in adhesive and sealant formulations utilizing VTMO as an additive for increasing hydrolytic stability. Other silane grades include REAXIS® C248T (DBTO+ tetraethylortho silane/TEOS) and REAXIS® C417(DOTO + TPOS). Other liquid grades are available upon request. REAXIS® C417VM is present on a wide range of international regulatory inventories, making it a great choice for multinational formula development. REAXIS® C417VM is an ideal replacement for the acetyl acetonate-based catalysts, REAXIS® C226 and REAXIS® C2013.
|Tin Content (%)
|17.6 - 23.0
|1.0 - 1.2
|Color (Gardner Number)
REAXIS® C417VM and its alternatives can be used as a homogeneous catalyst in a wide spectrum of silicone applications including adhesives, sealants, coatings and elastomers. Silicone-based applications include: acetoxy-, ethoxy- and oxime-based Room Temperature Vulcanizing (RTV) adhesives and sealants, polyethylene crosslinked silanes (PEX), and select silane-modified polymers (SMPs) such as those based MS Polymer™ and SPUR+™ polymer platforms. REAXIS® C417VM is ideal for use in adhesive and sealant formulations utilizing VTMO as an additive for increasing hydrolytic stability. REAXIS® C417VM is ideal replacement for the acetyl acetonate-based catalysts, REAXIS® C226 and REAXIS® C2013 in most MS Polymer™ based formulations.
Given its high tin content, liquid form, and good compatibility with a wide range of raw materials, REAXIS® C417VM tends to be a moderately reactive catalyst across a broad range of silicone formulations. In regard to silicone reactions, REAXIS® C417VM, like all tin-based catalysts, will catalyze the silanol/silane condensation reaction, thus acting as both a polymerization and crosslinking catalyst. REAXIS® C417VM is hydrolytically stable within typical formulation moisture levels, but this stability tends to break down with increasing moisture content. This characteristic hydrolytic stability is enhanced given REAXIS® C417VM’s octyl nature and is typically an improvement compared to the use of similar butyl-based, like REAXIS® C248T and REAXIS® C248VM,) and methyl-based organotin catalysts. It has been determined that the silane acts as a non-reactive diluent and thus does not affect catalyst efficiency.
REAXIS® C417VM should be stored in the original packaging at moderate temperatures. The container should be closed tightly after each use to maximize shelf life. Given the presence of a silane, hydrolytic instability could occur resulting in reduced catalytic performance. Due to the presence of VTMO, REAXIS® C417VM is classified as a flammable compound.