REAXIS® C314, also known as (Dioctyltin bis-2-ethylhexyl maleate,) is a member of the dialkyl family of organotins. As an octyltin carboxylate with a unique ligand, REAXIS® C314 is characterized by an improved hydrolytic stability and lower toxicity versus its dibutyl -based analogue, REAXIS® C317. REAXIS® C314 is primarily used as a Lewis Acid -based homogeneous catalyst in a wide range of silicone (condensation reactions) and polyurethane applications. Similar products would include, REAXIS® C216 (Dioctyltin Dilaurate), REAXIS® C318 (Dioctyltin Dineodecanoate) and REAXIS® C228 (Dioctyltin Diacetate).
|Tin Content (%)||15.4 Max|
|Color (Gardner Number)||3 Max|
|Viscosity (cP @ 20°C)||400 Max|
|Density (g/ml)||1.08 - 1.11|
|Water Content (%)||0.5 Max|
REAXIS® C314 and its alternatives can be used as a homogenous catalyst in a wide spectrum of silicone and polyurethane applications including adhesives, sealants, coatings, plastics, and foams. 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). As a polyurethane catalyst, REAXIS® C314 is a suitable catalyst for a wide range of aromatic isocyanate-based formulations, specifically those used in adhesives, sealants, and elastomers. REAXIS® C314 is present on most international regulatory lists including US TSCA and Canada DSL.
As an octyl tin with large ligand, the reactivity of REAXIS® C314 is best characterized as balanced, with moderate front and back-end reactivity in both silicone and polyurethane applications. REAXIS® C314 is a good catalyst for applications requiring moderate front-end reactivity or require a gradual curing process, such as coatings, adhesives, sealants, and elastomers. In regard to silicone reactions, REAXIS® C314 will catalyze the silanol/silane condensation reaction, acting as both a polymerization and crosslinking catalyst. As a polyurethane catalyst, REAXIS® C314 will more selectively ity catalyze the isocyanate-polyol reaction in addition to some catalysis of the water reaction. Thus, in polyurethanes, REAXIS® C314 acts as a polymerization & gelation catalyst. If a catalyst with a higher reactivity is required, the butyl analogue, REAXIS® C317, is recommended. To a limited extent, reactivity can be controlled via adjusting dosing concentration.
REAXIS® C314 should be stored in the original packaging at moderate temperatures and kept from freezing. The container should be closed tightly after each use to maximize shelf life. Characteristic of most Sn (IV) organotins, the primary cause of instability would be hydrolysis. Hydrolysis results in the formation of tin oxide insolubles leading to deactivation of REAXIS® C314.