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Platinum catalyst and preparing method thereof and preparing method of silicone rubber

A platinum catalyst and compound technology, which is applied in the preparation of platinum catalysts and silicone rubber, and its preparation field, can solve the problems of poor vulcanization activity and mechanical properties of silicone rubber, poor catalytic activity of platinum complexes, and poor stability of platinum catalysts, and achieves excellent performance. Excellent effect of vulcanization activity and mechanical properties, catalytic activity and storage stability

Active Publication Date: 2017-02-22
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, adopting these two methods can only obtain platinum catalysts with low platinum content, and the stability of platinum catalysts is all poor, especially at room temperature, it is easy to precipitate platinum black, and meanwhile, the catalytic activity of platinum complexes is poor, Silicone rubber synthesized with this platinum catalyst has poor vulcanization activity and mechanical properties

Method used

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  • Platinum catalyst and preparing method thereof and preparing method of silicone rubber
  • Platinum catalyst and preparing method thereof and preparing method of silicone rubber
  • Platinum catalyst and preparing method thereof and preparing method of silicone rubber

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of platinum catalyst, comprises the following steps:

[0037] A) the alcohol solution of chloroplatinic acid is mixed with the compound containing vinyl, and the first reaction is carried out by heating;

[0038] B) mixing the product obtained by the first reaction with the nitrogen-containing organic compound, and heating to carry out the second reaction to obtain a platinum catalyst.

[0039] The present invention has no special limitation on the preparation method of the alcohol solution of chloroplatinic acid, and the preparation method well known to those skilled in the art can be adopted. In the present invention, preferably, chloroplatinic acid is added to liquid alcohol, and mixed to obtain an alcoholic solution of chloroplatinic acid. The liquid alcohol is preferably absolute ethanol or isopropanol. The dosage ratio of the chloroplatinic acid to the liquid alcohol is preferably 50-80g:200-500mL....

Embodiment 1

[0077] 78 grams of chloroplatinic acid are added to 250 milliliters of ethanol, mixed to form an alcoholic solution of chloroplatinic acid, added dropwise to a round-bottomed flask containing 60 grams of tetramethyldivinyldisiloxane, stirred evenly, and Under the condition of nitrogen protection, heat and reflux in 35°C water bath or oil bath for 2 hours, then add 0.5 g of N,N,N',N'-tetramethylethylenediamine, react at 65°C for 1 hour, add 250 grams of sodium bicarbonate were neutralized, and then under a vacuum of 6.66kpa, small molecular substances such as alcohol and water were distilled off under reduced pressure at 50°C, and solid impurities were removed by filtration to obtain a platinum catalyst. The mass content of platinum in the platinum catalyst was 32.51%. .

[0078] The above-mentioned platinum catalyst made with 100mm 2 / s diluted with simethicone oil, the mass content of platinum in the diluted platinum catalyst is 0.25%. Liquid silicone rubber BQ-6250 base ma...

Embodiment 2

[0082] Add 50 grams of chloroplatinic acid to 200 milliliters of isopropanol, mix to form an alcohol solution of chloroplatinic acid, add dropwise to a round-bottomed flask containing 30 grams of tetramethyldivinyldisiloxane, and stir evenly , and under the condition of nitrogen protection, heat and reflux in a water bath or an oil bath at 35°C for 2 hours, then add 0.8 g of N,N-dimethylformamide, react at 65°C for 1 hour, and add 160 g of sodium bicarbonate Neutralize, and then under vacuum 6.66kpa, 50 ℃ under reduced pressure distillation to remove small molecular substances such as alcohol and water, filter to remove solid impurities, to obtain a platinum catalyst, the mass content of platinum in the platinum catalyst is 38.02%.

[0083] The above-mentioned platinum catalyst made with 100mm 2 / s diluted with simethicone oil, the mass content of platinum in the diluted platinum catalyst is 0.25%. Liquid silicone rubber BQ-6250 base material (produced by Dongguan Betley New ...

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Abstract

The invention discloses a platinum catalyst. In the platinum catalyst, organic ligands are a compound containing vinyl and an organic compound containing nitrogen. A platinum complex formed through coordination of the two organic ligands and chloroplatinic acid not only breaks through traditional imprisonment that only a platinum catalyst containing a low content of platinum can be synthesized, and synthesizes the platinum catalyst with a high content of platinum, but also forms the platinum catalyst which has excellent catalytic activity and excellent storage stability. When the platinum catalyst is used for catalyzing and synthesizing silicone rubber, the obtained silicon rubber has excellent vulcanization activity and an excellent mechanical property. In addition, the prepared platinum catalyst can be diluted to various suitable concentrations according to the need so as to be used for silica gel products of various forms, and thus being easy to weigh and accurate in dosage.

Description

technical field [0001] The invention relates to the technical field of noble metal and unsaturated olefin coordination synthesis catalysts, in particular to a platinum catalyst, a preparation method thereof and a preparation method of silicon rubber. Background technique [0002] Silicone rubber is widely used in many fields because of its high and low temperature resistance, weather resistance, ultraviolet resistance, insulation, radiation resistance, ozone resistance, etc. Coatings, wires, chip contact protection coatings, kitchen tableware cookware products, medical products, molds and rollers, etc. In addition to the above general properties, the addition-type silicone rubber in silicone rubber has the advantages of stable size, no vulcanization products, and products that can directly contact food and human body, so it is more popular. The synthesis of addition-type silicone rubber is based on the addition reaction of the silicon-hydrogen bond and the double bond in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/20C08G77/08
CPCC08G77/08C08G77/20
Inventor 王全林柱锋苏俊柳丰正光殷恒
Owner 东莞市贝特利新材料有限公司
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