2627-95-4Relevant articles and documents
PROCESSES FOR SYNTHESIZING UNSYMMETRICAL DISILOXANES
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Paragraph 0044-0046, (2021/06/22)
Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with an alkyl halosilane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the alkyl halosilane is about 10:1 to about 1:10. The alkenyl halosilane and the alkyl halosilane are mixed at about 20 °C to about 45 °C. The reaction product is separated and washed with saturated alkali carbonate solution.
Preparation method of 1-vinyl-1,1,3,3,3-pentamethyldisiloxane
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Paragraph 0039-0041, (2018/09/11)
The invention relates to a preparation method of 1-vinyl-1,1,3,3,3-pentamethyldisiloxane, prepared by: using 1,3-divinyl-1,1,3,3,-tetramethyldisiloxane ad 1,1,1,3,3,3-hexamethyldisiloxane as materials, carrying out rearrangement reaction under the catalytic action of a complexing catalyst KOH/18-crown ether-6; neutralizing the catalyst, filtering, and distilling filtrate. The macromolecular ring compound 18-crown ether-6 and KOH form the complexing agent; the compound reaction helps improve catalyst activity and efficiently catalyzes for rearrangement reaction. The macromolecular ring compound18-crown ether-6 and KOH form a complexing catalyst; complexing reaction is performed to obtain improved catalyst activity, and rearranging reaction is efficiently catalyzed. In addition, the preparation method is simple, the reacting is fast and stable, and the preparation method has the advantages of high yield, good safety, good environmental friendliness and the like.
Method for preparing 1,3-divinyl-1,1,3,3-tetramethyldisiloxane
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Paragraph 0014; 0015; 0016-0019; 0020-0023; 0024-0027, (2018/06/26)
The invention discloses a method for preparing 1,3-divinyl-1,1,3,3-tetramethyldisiloxane. The method comprises the following step: 1,3-divinyl-1,1,3,3-tetramethyldisiloxane is prepared from 1,1,3,3-tetramethyldisiloxane, acetylene, cocatalyst amine compounds and a reaction system formed by a catalyst ruthenium compound through reaction. According to the preparation method, 1,1,3,3-tetramethyldisiloxane and acetylene can be subjected to reaction in one step under the mild condition for generation of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane. The method has the advantages of few side reactions,high yield of main products, lower cost and high safety, and is suitable for industrial production.