Preparation method of high-yield high-activity alkynol-coated vinyl platinum complex

Abstract

The invention discloses a preparation method of a high-yield high-activity alkynol-coated vinyl platinum complex. The preparation method is characterized by comprising the following steps that 1, 100 parts by weight of 1,3-divinyltetramethyldisiloxane is taken to be poured into a reaction kettle; 2, 1-8 parts by weight of chloroplatinic acid is dissolved with solvent to obtain a chloroplatinic acid solution, the chloroplatinic acid solution is poured into the reaction kettle to be stirred, the temperature is increased to 50-60 DEG C, and the reaction time is set for 0.5-2 h; 3, 5-30 parts by weight of sodium bicarbonate is added into the reaction kettle, then the temperature is increased to 60-80 DEG C, and stirring is continuously performed to enable a reaction to be performed for 1-3; 4, 1-10 parts by weight of alkynol is dissolved with 10-100 parts by weight of solvent to obtain an alkynol solution, the alkynol solution is dropwise added into the reaction kettle, and dropwise adding is completed in 0.5-2 h; 5, filtering is performed to obtain filtrate and sodium bicarbonate residues; 6, reduced-pressure solvent removing is performed on the filtrate at 60 DEG C to obtain liquid; 7, vinyl silicone oil is added into the liquid to obtain the high-yield high-activity alkynol-coated vinyl platinum complex. The preparation method is simple and easy to achieve, and the yield of the prepared product can be more than 98 percent.

Description

technical field [0001] The invention belongs to the field of preparation of organosilicon addition reaction catalysts, in particular to a preparation method of vinyl platinum complex coated with acetylenic alcohol with high yield and high activity. Background technique [0002] Silicone addition reaction uses platinum as a catalyst to produce transparent and non-yellowing silicone products. Vinyl platinum complex, also known as platinum water and Karstedt catalyst (English full name: KarstedtCatalystSolution) on the market, is mainly a catalyst with zero-valent platinum as the active component. It is a colorless, transparent or light yellow liquid with high catalytic efficiency. It can suppress the side reactions accompanying Si-Vi (Vi is the abbreviation of vinyl Vinyl) and Si-H during the reaction process, avoid the formation of black substances, and overcome the yellowing or blackening of products during the use of other catalysts, so it can Prepare highly transparent pr...

AI Technical Summary

Problems solved by technology

However, the Karstedt catalyst has the disadvantage of easily losing activity, which is not conducive to storage and use

Chinese patent CN102302951A discloses a special catalyst for hydrosilylation reaction, but the catalyst is only a mixture of chloroplatinic acid and divinyltetramethyldisiloxane, and this simple mixture cannot form vinyl platinum complex catalyst, and the yield is low