- Preparation method of unsaturated organosilazane
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The invention provides a preparation method of unsaturated organosilazane, and the method comprises the following steps: mixing an organic silicide, an organic solvent and a metal halide, dropwisely adding an acylation reagent at 50-100 DEG C under stirring conditions, and refluxing for 3-8 hours to obtain R1R2R3SiX; X is selected from Cl, Br or I; the organic silicide is selected from R1R2R3SiO4or R1R2R3SiOSiR1R2R3; R1 is selected from alkyl containing a double-bond functional group; R2 and R3 are selected from alkyl containing a double-bond functional group, C1-C4 alkyl or phenyl; R4 is selected from a C1-C4 alkyl group; and by introducing ammonia gas into the R1R2R3SiX to carry out a reaction, unsaturated organosilazane R1R2R3SiNHSiR1R2R3 is obtained. The method is simple, mild in condition, free of pollution and high in yield. The yield of the R1R2R3SiNHSiR1R2R3 is 95-96%.
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Paragraph 0041-0042; 0044-0050
(2020/09/16)
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- Preparation method of silazane
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The invention provides a preparation method of silazane. The preparation method comprises the following steps: carrying out a stirring reaction on monochlorosilane, alkali metal amide, a catalyst anda solvent in a reaction container completely; and after the reaction is finished, carrying out reduced pressure distillation to obtain the silazane. Compared with the prior art, the invention providesa new silazane synthesis technology, the process is simple, the yield is as high as 93.0%, and the purity can reach 93.6%.
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Paragraph 0022-0023
(2020/10/14)
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