Silane coupling agent, preparation method and application thereof

A technology of silane coupling agent and vinyltrichlorosilane, which is applied in the field of silane coupling agent and its preparation, can solve problems such as instability of acrylic emulsion, improve storage stability, reduce slag rate, and improve paint film performance Effect

Active Publication Date: 2020-03-24
湖北新蓝天新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of instability of acrylic emulsion caused by the addition of silane coupling agent in the prior art, the present invention provides a silane coupling agent to solve the problem of instability of acrylic emulsion

Method used

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  • Silane coupling agent, preparation method and application thereof
  • Silane coupling agent, preparation method and application thereof
  • Silane coupling agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Carry out feeding reaction according to the molar ratio of vinyltrichlorosilane and ethanol as 1:1.1: first add ethanol to the reaction kettle, heat it to 80°C to make it slightly boiling, and then add it at a rate of 3.8g / min Slowly add vinyl trichlorosilane dropwise from the top of the packed tower to make the two fully contact and react in the tower. After the dropwise addition is completed, keep the reaction at 100°C for 2 hours. , to obtain intermediate C 2 h 3 Si(OC 2 h 5 )Cl 2 ;

[0030] (2) Carry out feeding reaction according to the molar ratio of vinyltrichlorosilane and ethyl lactate as 1:2: first add ethyl lactate to the reaction kettle, heat to slight boiling, and then mix the intermediate obtained in step (1) with 6.6 The dropping rate of g / min is dripped into the reaction kettle from the top of the tower, and after the dropping is completed, it is incubated and reacted at 160°C for 4 hours. During the reaction, the hydrochloric acid produced by t...

Embodiment 2

[0033] (1) Feed reaction according to the molar ratio of vinyltrichlorosilane and ethanol as 1:1.2: first add ethanol to the reaction kettle, heat it to 80°C to bring it into a slightly boiling state, and then drop it at a rate of 3.8g / min from Slowly add vinyl trichlorosilane to the top of the packed tower to make it fully contact and react in the tower. After the dropping is completed, keep it warm at 100°C for 2 hours. Body C 2 h 3 Si(OC 2 h 5 )Cl 2 ;

[0034] (2) Carry out feeding reaction according to the molar ratio of vinyltrichlorosilane and ethyl lactate as 1:2: first add ethyl lactate to the reaction kettle, heat to slight boiling, and then mix the intermediate obtained in step (1) with 6.6 The dropping rate of g / min is dripped into the reaction kettle from the top of the tower, and after the dropwise addition is completed, it is incubated at 150°C for 5 hours. During the reaction, the hydrochloric acid produced by the reaction is introduced into 10wt% ammonia w...

Embodiment 3

[0037] (1) Feed reaction according to the molar ratio of vinyltrichlorosilane and ethanol as 1:1.2: first add ethanol to the reaction kettle, heat it to 80°C to bring it into a slightly boiling state, and then drop it at a rate of 3.8g / min from Slowly add vinyl trichlorosilane to the top of the packed tower to make it fully contact and react in the tower. After the dropping is completed, keep it warm at 100°C for 2 hours. Body C 2 h 3 Si(OC 2 h 5 )Cl 2 ;

[0038] (2) Carry out feeding reaction according to the molar ratio of vinyltrichlorosilane and ethyl lactate as 1:2: first add ethyl lactate to the reaction kettle, heat to slight boiling, and then mix the intermediate obtained in step (1) with 6.6 The dropping rate of g / min is dripped into the reaction kettle from the top of the tower, and after the dropwise addition is completed, it is incubated at 160°C for 4 hours. During the reaction, the hydrochloric acid produced by the reaction is introduced into 10wt% ammonia wat...

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Abstract

The invention discloses a silane coupling agent, a preparation method and application thereof. The chemical name of the silane coupling agent is vinyl ethoxy ethyl dilactate silane, and the preparation method includes: carrying out stirring reaction on vinyl trichlorosilane and ethanol in a molar ratio of 1:1.1-1.2 at 100DEG C-110DEG C for 2-3h to obtain an intermediate; reacting the intermediatewith ethyl lactate at 150-160DEG C for 4-6h to obtain a crude product, wherein the molar ratio of vinyl trichlorosilane to ethyl lactate is 1:2-4; heating the crude product to 90-110DEG C, also conducting vacuum pumping to a vacuum degree ranging from -0.09MPa to -0.095MPa, and keeping a constant temperature and constant pressure for 2-3h, reducing the pressure, then adding magnesium powder to neutralize the crude product to neutral, and performing rectification to obtain the vinyl ethoxy ethyl dilactate silane. According to the method, hydrochloric acid generated in the reaction process is adsorbed with ammonia water with a concentration of 10wt%, thus preventing environmental pollution; after being added into an acrylic emulsion, the silane coupling agent not only can the improve performance of a paint film, but also can improve the storage stability of the emulsion, and is pollution-free after decomposition.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a silane coupling agent and its preparation method and application. Background technique [0002] With the improvement of people's living standards and the emphasis on health, the demand for environmentally friendly materials is increasing. Traditional oil-based paints not only smell bad and pollute the environment, but also produce VOC after use, which is harmful to human health, especially ethers. , Aldehyde substances will cause great harm to human health. At this stage, traditional oil-based coatings cannot meet the current needs. Water-based coatings are developing rapidly because of their environmental protection and health. At present, the most widely used water-based paint with increasing demand is acrylic emulsion. Compared with oil-based paint, its high gloss and environmental protection have irreplaceable advantages. It is widely used in automobiles, machinery, paperm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18C09D125/14C09D7/63
CPCC07F7/188C07F7/1804C09D125/14C09D7/63C08K5/5425
Inventor 王昆李胜杰冯琼华肖俊平
Owner 湖北新蓝天新材料股份有限公司
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