Efficient anti-poisoning Karstedt catalyst and synthesis and application in hydrosilylation reaction

Abstract

Disclosed are an efficient anti-poisoning Karstedt catalyst and synthesis and application in hydrosilylation reaction. Certain-proportion trialkylboron and a derivative thereof are added into a classical Karstedt catalyst, backflow is conducted in solvent at certain temperature for certain time, and the Karstedt catalyst with high activity and high anti-poisoning performance is obtained. The efficient anti-poisoning Karstedt catalyst can be applied to additivity liquid liquid silicone rubber, silica gel ink, silane coupling agent synthesis, hydrogen-containing silane, olefin and other hydrosilylation reactions. According to the efficient anti-poisoning Karstedt catalyst and synthesis and application in hydrosilylation reaction, the activity of the classical Karstedt catalyst and the anti-poisoning performance of the Karstedt catalyst under relatively high (halogen, phosphorus, sulfur and the like) concentration are improved greatly, the usage quantity of the catalyst is high (by Pt), and the economy is good. The hydrosilylation efficiency is high, and the reaction condition is mild. The influence on the finished product appearance is low, and the defective rate is low. The efficient anti-poisoning Karstedt catalyst and synthesis and application in the hydrosilylation reaction can be widely applied to organosilicone monomers and organosilicone polymers.

Description

technical field [0001] The invention relates to the synthesis and application of organosilicon catalyst, and relates to the synthesis of catalyst and its application in hydrosilylation reaction. [0002] technical background [0003] The hydrosilylation reaction is one of the most important reactions in the synthesis of organosilicon monomers and polymers. It is an addition reaction of hydrosilane and unsaturated bond compounds under the action of metal catalysts. Catalysts play a vital role in this. Since 1947 Sommer et al. ( J. Am. Chem. Soc., 1947,69:188 ) since the discovery of this reaction, hydrosilylation catalysts have been continuously evolving. Specifically, from 1947 to 1957, the main reason is that potassium chloroplatinate and chloroplatinic acid are less active as catalysts ( French, 961816[P], 1949; USA, 2632013[P], 1953; USA, 2637738[P], 1953. ), in 1957 Speier found that dissolving chloroplatinic acid in isopropanol as a catalyst for this reaction had a q...

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Problems solved by technology

Moreover, many hydrosilylation systems contain heteroatoms that poison the Pt in the Karstedt catalyst. At present, there is still no good way to improve its anti-poisoning performance in the literature and industry, and most of the methods are to add more catalysts. Or pre-deactivate the Pt center of Karstedt catalyst with ligands (such as adding acetylenic alcohol, fumaric anhydride and non-volatile vinyl silicone oil and vinyl ring body)

These practices will increase the amount of platinum used, which will lead to a sharp increase in the platinum content of the reaction system, which will increase the production cost and cause yellowing after the final silicone product is formed, which is prone to rapid aging and low yield.

[0004] While studying platinum-based catalysts, scientists are also trying to find cheaper alternatives. Trialkylborane and its derivatives are the most studied cheap hydrosilylation catalysts in recent years ( J. Org. Chem., 2013, 78 (24), 12505; Angew. Chem. Int. Ed. 2013, 52, 11905. ) has been proved by many scientists to activate the Si-H bond so that it can add to unsaturated compounds to a certain extent, but this effect is far from industrial application

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