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Preparation technology for dimethyl diethoxy silane

The technology of dimethyldiethoxysilane and dimethyldichlorosilane is applied in the field of improvement of organosilane preparation process, and achieves the effects of improving reaction speed, high reaction purity and accelerating sedimentation

Active Publication Date: 2013-01-09
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the introduction of dimethyldiethoxysilane into epoxy resin can achieve the purpose of simultaneously improving the comprehensive properties of the cured material such as mechanics and heat resistance. Similar studies have not yet been reported in domestic and foreign literature.

Method used

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  • Preparation technology for dimethyl diethoxy silane

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Experimental program
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Effect test

Embodiment 1

[0012] Example 1, the preparation process of dimethyldiethoxysilane, including the following chemical raw materials and neutralization treatment agent in mass proportion: 100 parts of silicon dimethyldichlorosilane; 150 parts of absolute ethanol; 0.05 part of sodium ethylate ; 0.02 parts of hexamethyldisilazane and 0.01 parts of N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane.

[0013] Its process flow: send absolute ethanol from its storage tank to the ethanol vaporization kettle for vaporization with a delivery pump; Vaporization: Vaporized anhydrous ethanol enters the stripping kettle, and then the stripping kettle enters the alcoholysis kettle to react with vaporized dimethyldichlorosilane, and the reacted material enters the alcoholysis kettle; when the liquid level of the alcoholysis kettle reaches the At 60% of the total height of the inner cavity, use the transfer pump to send half of the material in the alcoholysis kettle to the stripping kettle for acid removal, ...

Embodiment 2

[0022] Embodiment 2. The dimethyldiethoxysilane involved in the present invention includes chemical raw materials in the following mass proportions: 100 parts of dimethyldichlorosilane, 150 parts of absolute ethanol, 0.02 part of sodium ethylate, hexamethyl 0.01 part of disilazane, 0.01 part of N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane. All the other are with embodiment 1.

Embodiment 3

[0023] Embodiment 3. The dimethyldiethoxysilane involved in the present invention includes chemical raw materials in the following mass proportions: 100 parts of dimethyldichlorosilane, 150 parts of absolute ethanol, 0.01 part of sodium ethylate, hexamethyl 0.02 part of disilazane, 0.02 part of N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane. All the other are with embodiment 1.

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Abstract

The invention relates to improvement on preparation technology for dimethyl diethoxy silane. The referred dimethyl diethoxy silane comprises the following chemical raw materials and neutralization treating agents in part by weight: 100 parts of dimethyl dichloro silicane, 150 parts of absolute ethanol, 0.05 part of sodium ethylate, 0.02 part of hexamethyldisilazane and 0.01 part of amino monomer.The preparation technology has the advantages of increasing the height of an alcoholysis kettle to make the alcoholysis reaction more sufficient, raising the reaction temperature to make chlorine in the materials better substituted to ensure full reaction and increase the yield rate, enlarging a comprehensive tank to reduce the consumption of a neutralizing agent and save the neutralizing agent, adding an external circulating pump and a gas filtration pump to realize continuous production by the alcoholysis reaction, increase the reaction speed and reduce byproducts generated by the overlong reaction, adding a settling tank which is favorable for performing rectification reaction to isolate air, eliminate salt slurry, reduce corrosion and protect a rectification tower.

Description

technical field [0001] The invention relates to an improvement of a preparation process of organosilane in the field of chemistry, in particular to an improvement of a preparation process of dimethyldiethoxysilane. Background technique [0002] Silicone material is a new type of chemical material developed in recent decades, and has been given the double reputation of "catalyst" for technological development and "industrial monosodium glutamate" by experts. [0003] The dimethyldiethoxysilane involved in the present invention is used to modify the epoxy resin, and it is introduced into the epoxy resin to form a moderately cross-linked network system to achieve the purpose of increasing the glass transition temperature; and And because its molecular structure contains alkoxy groups, it is easily hydrolyzed in the presence of a catalyst, and a small part of dimethyldiethoxysilane then undergoes self-crosslinking reaction to form silicone oligomers and introduce them into epoxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18
Inventor 余文清龚文冷发钱
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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