Co-Formula Silane Coupling Agent CFS-973, Hexamethyldisilazane is an easily hydrolyzed liquid that releases NH3 to form hexamethyldisiloxane. In the presence of a catalyst, it reacts with alcohol or phenol to generate trimethylalkoxysilane or trimethylaryloxysilane. It reacts with anhydrous hydrogen chloride to release NH3 or NH4Cl to generate trimethylchlorosilane. It can be prepared by the reaction between trimethylchlorosilane and NH3. CFS-973 can be used as a hydrophobic treatment agent for the surface of fumed silica and a reagent for providing N atoms in organic synthesis reactions. It can also be used as an auxiliary agent for silicon carbide fibers to improve the heat resistance and strength of silicon carbide fibers. Used as an anti-settling agent for coatings. And for the preparation of organosilicon compounds. 

Preparation of Silane Coupling Agent CFS-997

1. Dissolve 109 g (1.0 mol) trimethylchlorosilane in 500 ml of anhydrous ether, pass ammonia gas, and a white precipitate will appear immediately. Heat to reflux, slowly pass ammonia for 6h, make ammonium chloride settle, filter, take ether solution to distill out diethyl ether first, then distill out hexamethyldisilazane to obtain 52.5g, the yield is 65%.

2. Dissolve trimethylchlorosilane with anhydrous diethyl ether, pass in ammonia gas while stirring, a white precipitate appears, and the temperature rises slightly. While ventilating, the reaction solution was heated to reflux and maintained for 6 h. During the process, diethyl ether was continuously supplemented. After the ammonium chloride precipitation was complete, it was filtered. The obtained ammonium chloride precipitation was washed several times with diethyl ether. Dry over anhydrous sodium sulfate, carefully evaporate the ether, and collect the fractions at 124-126°C by atmospheric distillation to obtain the finished product hexamethyldisilazane.

Application of Silane Coupling Agent CFS-997

1. Silane Coupling Agent CFS-997 can be used for the production of rubber and medicine. This product is a tail reducing agent that reduces the adsorption activity on the surface of the gas chromatography carrier. It is a pharmaceutical intermediate of amikacin and a protective agent for hydroxyl and amino groups.

2. Silane Coupling Agent CFS-997 can be used for special organic synthesis. It can be used for silylation in the synthesis of amikacin, penicillin, cephalosporin, fluorouracil and various penicillin derivatives.

3. Silane Coupling Agent CFS-997 can be used for the surface treatment of diatomite, white carbon black, titanium and other powders.

4. Silane Coupling Agent cfs-997 can used as a bonding aid for photoresist in the semiconductor industry. In organosilazane chemistry, it can be used for chlorine exchange with chlorosilane monomers to obtain polysilazane. This method has a huge advantage in synthesis over the direct ammonia method.