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LS-623 1,3-Divinyl-1,1,3,3-tetramethyldisilazane
CAS NO. 7691-02-3
Silfluo LS-623 is 1,3-Divinyltetramethyldisilazane (DVTMDZ . VMN), a divinyl-functional disilazane.
The molecule contains two dimethylvinylsilyl groups connected by an Si–N–Si linkage.
The silazane N–H bond reacts with silanol groups (Si–OH) on inorganic surfaces, silica fillers, or polymer chain ends without external catalyst, releasing ammonia as the sole byproduct.
The terminal vinyl groups participate in platinum-catalyzed hydrosilylation in addition-cure silicone systems, enabling covalent incorporation into the crosslinked network.
Used as vinyl-functional end-capping agent in silicone rubber and resin synthesis, adhesion promoter in microelectronics and semiconductor photoresist applications, and surface treatment agent for silica and inorganic fillers.
