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Processing technology of 3-aminopropyl trimethoxysilane

A technology of aminopropyltrimethoxysilane and aminopropyltriethoxysilane, which is applied in the field of processing technology of 3-aminopropyltrimethoxysilane, can solve the problems of poor storage stability and achieve coupling Strong activity, low ethanol content, good storage stability

Inactive Publication Date: 2019-09-13
湖北华欣有机硅新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of strong coupling activity, good storage stability, low ethanol content, to solve the existing 3-aminopropyltriethoxysilane used directly in the water-based system, which is prone to premature self-polymerization and cross-linking failure , 3-aminopropyltriethoxysilane with poor storage stability and ethanol release

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a 2000ml glass four-neck reaction flask with mechanical stirring, spherical reflux condenser, thermometer and oil bath heating, add 1000g of distilled water and heat up to 20°C, then start stirring at a stirring speed of 80 rpm. Under the condition of rpm, 400 g of 3-aminopropyltriethoxysilane with a content of 98.5% and a colorless and transparent appearance was added dropwise into a four-necked flask for hydrolysis reaction, and the dropping time was controlled to be 2 hours. After the dropwise addition, the temperature was raised to 60° C. to continue the reaction for 2 hours, and the temperature was lowered to below 30° C. after the reaction was completed.

[0021] Add the material obtained by the reaction into a 2000ml three-necked flask with a fractionating tower, a thermometer and oil bath heating. The fractionating tower is a glass packed tower with a length of 400 mm and an inner diameter of 10 mm, filled with glass spring packing. Under the condition of nor...

Embodiment 2

[0024] In a 2000ml glass four-neck reaction flask with mechanical stirring, spherical reflux condenser, thermometer and oil bath heating, add 1000g of distilled water and heat up to 60°C, then start stirring at a stirring speed of 300 rpm. Under the stirring condition of 300 rpm, 500 g of 3-aminopropyltriethoxysilane with a content of 98.5% and a colorless and transparent appearance was added dropwise into a four-necked flask, and the dropping time was controlled to be 6 hours. After the dropwise addition, the temperature was raised to 80° C. to continue the reaction for 3 hours, and the temperature was lowered to below 30° C. after the reaction was completed.

[0025] Add the material obtained by the reaction into a 2000ml three-necked flask with a fractionating tower, a thermometer and oil bath heating. The fractionating tower is a glass packed tower with a length of 400 mm and an inner diameter of 10 mm, filled with glass spring packing. Under the condition of normal pressu...

Embodiment 3

[0028] In a 2000ml glass four-neck reaction flask with mechanical stirring, spherical reflux condenser, thermometer and oil bath heating, add 1000g of distilled water and heat up to 50°C, then start stirring at a stirring speed of 200 rpm. 600 g of 3-aminopropyltriethoxysilane with a content of 98.5% and a colorless and transparent appearance was added dropwise into a four-necked flask, and the dropping time was controlled to be 5 hours. After the dropwise addition, the temperature was raised to 70° C. to continue the reaction for 2 hours, and the temperature was lowered to below 30° C. after the reaction was completed.

[0029] Add the material obtained by the reaction into a 2000ml three-necked flask with a fractionating tower, a thermometer and oil bath heating. The fractionating tower is a glass packed tower with a length of 400 mm and an inner diameter of 10 mm, filled with glass spring packing. Under the condition of normal pressure 101.3Kpa, the by-product ethanol produ...

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PUM

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Abstract

Belonging to the technical field of fine chemical industry, the invention relates to a processing technology of 3-aminopropyl trimethoxysilane. Specifically, 3-aminopropyl triethoxysilane is subjectedto prehydrolysis under certain condition to hydrolyze most ethoxy in 3-aminopropyl triethoxysilane molecule into silanol (Si-OH), and polycondensation of silanol into siloxane is inhibited, thus solving the problem of premature crosslinking of existing 3-aminopropyl triethoxysilane in an aqueous system. The product prepared by the technology provided by the invention has the characteristics of strong coupling activity, good storage stability and low ethanol content, and can be directly applied to glass fiber reinforcement, waterborne polyurethane modification, waterborne paint tackifying andother waterborne systems.

Description

technical field [0001] The invention relates to a processing technology of 3-aminopropyltrimethoxysilane, which belongs to the technical field of fine chemicals. Background technique [0002] 3-Aminopropyltriethoxysilane (KH550) is a general-purpose silane coupling agent, which can almost couple with various resins, and is widely used in glass fiber reinforcement, resin surface modification, textile finishing, etc. , but in some water-based systems, its actual use effect is often not ideal. [0003] If 3-aminopropyltriethoxysilane is directly added to the water-based system in proportion according to the conventional use method, its storage life is very short, generally not more than one week, and it needs to be added again after a period of time, so in the actual application process It needs to be prepared and used immediately, otherwise the coupling effect will be gradually lost with the prolongation of storage time, which will bring difficulties to the application of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08C07F7/10
CPCC07F7/0836
Inventor 夏正东李新春
Owner 湖北华欣有机硅新材料有限公司