18586-22-6Relevant articles and documents
Preparation method of 1,5-divinyl-3,3-diphenyl-1,1,5,5-tetramethyltrisiloxane
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Paragraph 0063-0065, (2019/09/14)
The invention relates to a preparation method of 1,5-divinyl-3,3-diphenyl-1,1,5,5-tetramethyltrisiloxane. The preparation method comprises the steps: under the protection of protective gas, mixing anorganic solvent, diphenylsilyl glycol, divinyltetramethyldisiloxane and a catalyst at a ratio, raising the temperature for reflux, performing a reaction, performing reflux and separation on water generated during the reaction by using a water separator, lowering the temperature after completion of the reaction, performing neutralization and washing with water so as to obtain an organic phase, andperforming vacuum distillation so as to obtain the product. The problems of environmental protection and low selectivity which are caused by using chlorosilane as a reaction raw material are solved, and the preparation method has the advantages of simple operation, a high catalytic efficiency, a high yield, good safety and the like.
Method of manufacturing polyimidesiloxane compd. divinylbenzyl
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Paragraph 0021; 0023-0025, (2018/02/06)
PROBLEM TO BE SOLVED: To provide a production method by which a divinyl siloxane compound such as a divinyltrisiloxane is obtained in a high yield without using dimethyl vinyl chlorosilane.SOLUTION: A method of producing a divinyl siloxane compound represented by general formula (3) includes reacting of a silane diol compound with a divinyl siloxane compound by using an alkali metal catalyst. In the general formula(3), Ris an aryl group having 6 to 10 carbon atoms, Ris an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a cycloalkyl group or a cycloalkenyl group having 5 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms, and Rand Rare each independently an alkyl group having 1 to 4 carbon atoms.
