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Process for preparing methyl tri (methyl isobutyl ketoximino) silanes

A technology of methyl isobutyl ketone oxime and monomethyltrichlorosilane, which is applied in the direction of silicon organic compounds, can solve the problems of slow vulcanization speed, fast surface vulcanization, and metal corrosion, and achieve improved stability and transparency, The effect of increasing the relative content and improving the cohesiveness

Inactive Publication Date: 2004-12-29
蔡培元
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Problems solved by technology

[0002] At present, the well-known ones used in silicone rubber (RTV) include deacetate type, deamination type, deketone type and deoxime type as crosslinking agents. The deamination type has a special amine odor and is corrosive to copper; the deketone type is odorless and non-corrosive, but the surface vulcanization is fast and the internal vulcanization speed is slow, which has the disadvantage of easy cracking; Although the oxime type has a small taste, it has the disadvantages of corroding copper metals and corroding some plastics

Method used

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  • Process for preparing methyl tri (methyl isobutyl ketoximino) silanes

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Embodiment 1

[0013] Embodiment 1: In a 1 liter dry four-neck flask with a thermometer condenser, stirring, and a constant pressure barrel funnel, add 180 grams of methyl isobutyl ketoxime, 283 grams of petroleum ether and 175 grams of urea, and stir to dissolve for 5 minutes Finally, under continuous stirring and at 20°C, start to add 80 grams of methyltrichlorosilane dropwise. When the dropwise addition is completed in 1 hour, the temperature is 40°C, and then the temperature is raised to 50-55°C, and within this temperature range The stirring reaction was continued for 3 hours. Stand in a separatory funnel to separate into two phases. The lower phase was separated and neutralized with 270 grams of ammonia water. Move the supernatant liquid to another dry three-necked flask, and pass through ammonia to neutralize to PH=7.5 under stirring to precipitate ammonium chloride, separate the ammonium chloride after filtration, and transfer the filtrate to a distillation flask, Pressure distilla...

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Abstract

The preparation process of methyl tri(methylisobutylketoximyl) silane used as organic silicon rubber cross-liking agent includes dissolving methyl isobutyl ketoxime and urea in organic solvent, dropping methyl silane trichloride, heating to 50-55 deg.c for constant temperature reaction, letting stand for lamination, neutralizing the lower layer liquid, neutralizing and distilling the supernatant, and removing organic solvent to obtain product. The organic silicon rubber cross-liking agent has improved performance.

Description

technical field [0001] The present invention relates to the method that is applied to the preparation of silicone rubber (RTV) crosslinking agent Background technique [0002] At present, the well-known ones used in silicone rubber (RTV) include deacetate type, deamination type, deketone type and deoxime type as crosslinking agents. The deamination type has a special amine odor and is corrosive to copper; the deketone type is odorless and non-corrosive, but the surface vulcanization is fast and the internal vulcanization speed is slow, which has the disadvantage of easy cracking; Although the oxime type has a small taste, it has the disadvantages of corroding copper metals and eroding some plastics. Contents of the invention [0003] In order to improve the problems of metal corrosion, bonding performance, stability, cracking, transparency and toxicity of silicone rubber crosslinking agent, the present invention provides a A method for preparing methyl tri(methyl isobuty...

Claims

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Application Information

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IPC IPC(8): C07F7/08
Inventor 蔡培元刘树臣蔡邦成
Owner 蔡培元
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