Synthesizing method for organic silicon micro-balls with performances of super hydrophobicity and high temperature resistant

A technology of organosilicon microspheres and synthesis methods, which is applied in the field of organosilicon synthesis, can solve problems such as large differences in reactivity, irregular product shapes, and non-environmental protection in the preparation process, and achieve the goal of overcoming large differences in reaction rates, regular shapes, The effect of excellent heat resistance

Active Publication Date: 2012-09-19
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above studies require toluene and acetone as hydrolysis solvents, resulting in heavy pollution during the reaction, and the preparation process is not environmentally friendly.
In addition, due to the large difference in the reactivity of different monomers, especially the use of chlorosilanes, it is easy to produce large gels during the preparation process, resulting in irregular shapes of the generated products.

Method used

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  • Synthesizing method for organic silicon micro-balls with performances of super hydrophobicity and high temperature resistant
  • Synthesizing method for organic silicon micro-balls with performances of super hydrophobicity and high temperature resistant
  • Synthesizing method for organic silicon micro-balls with performances of super hydrophobicity and high temperature resistant

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Experimental program
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Effect test

Embodiment 1

[0026] Under nitrogen protection, 32ml of tetramethyl orthosilicate, 21ml of hexane and 26ml of distilled water join in In the reaction bottle, react at 25°C for 0.5 hours. Add 27ml of dichlorodimethylsilane dropwise to the reaction system at a rate of 0.03ml / s, and then react for 1.0 hour after the dropwise addition, the temperature rises to 50°C, continue the reaction for 2.0 hours, add 20ml of silane coupling agent KH570 After reacting for 1.0 hour, it was precipitated by alcohol or acetone, filtered by suction, and dried to obtain organosilicon microspheres.

Embodiment 2

[0028] Under nitrogen protection, 44ml of tetraethyl orthosilicate, 35ml of hexane and 15ml of distilled water join in In the reaction bottle, react at 25°C for 1.0 hours, add 24ml of dichlorodiethylsilane dropwise to the reaction system at a speed of 0.45ml / s, and react for 2.0 hours after the dropwise addition, the temperature rises to 50°C, and continue the reaction for 1.5 hour, add 18ml of silane coupling agent A151 and react for 1.0 hour, precipitated by alcohol or acetone, filtered by suction, and dried to obtain silicone microspheres.

Embodiment 3

[0030] Under nitrogen protection, 23ml of propyl orthosilicate, 30ml of hexane and 20ml of distilled water join in In the reaction bottle, react at 25°C for 1.5 hours, add 18ml of dimethyldiethoxysilane dropwise to the reaction system at a speed of 0.4ml / s, and react for 3.0 hours after the dropwise addition, the temperature rises to 50°C, continue After reacting for 1.0 hour, add 23ml of silane coupling agent KH560 and react for 3.0 hours, precipitate through alcohol or acetone, filter with suction, and dry to obtain silicone microspheres.

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Abstract

The invention discloses a synthesizing method for organic silicon micro-balls with performances of super hydrophobicity and high temperature resistant, which relates to the synthesizing method of organic silicon. The synthesizing method for the organic silicon micro-balls comprises the following steps: firstly hydrolyzing n-silicate ester of which the structural formula is Si(ORn)4 (n is the number of carbon atom), and then forming a spherical pre-polymer after polycondensation; adding alkylchlorosilane of which the structural formula is Cl2Si(Rn)2 (n is the number of carbon atoms) or alkoxy silane of which the structural formula is (Rn)2Si(ORn)2 (n is the number of carbon atoms), so as to obtain the organic silicon micro-balls of which surfaces are fully provided with alkyls after copolycondensation. The obtained micro-balls have good dispersibility, and have characteristics of super hydrophobicity and high temperature resistant and the range of particle diameter is within 0.5-10 microns. The organic silicon micro-balls are simple in production technology, free form pollution during the production process and convenient for post-treatment technology, and can be widely applied to rubber, plastic and adhesive, so as to improve the temperature resistant performance of basis materials. The organic silicon micro-balls also can be applied to coating and self-prepared hydrophobic self-cleaned coating.

Description

technical field [0001] The invention relates to a method for synthesizing organosilicon, in particular to a method for synthesizing superhydrophobic and high-temperature-resistant organosilicon microspheres. Background technique [0002] At present, the synthesis method of silicone microspheres is mainly hydrolysis-polycondensation method. The most researched is the hydrolysis-polycondensation reaction of trifunctional alkoxysilane and difunctional alkoxysilane together or alone. In addition, there are also alkylchlorosilanes used as starting reaction monomers. Most of the above studies require toluene and acetone as hydrolysis solvents, resulting in heavy pollution during the reaction and the preparation process is not environmentally friendly. In addition, due to the large difference in the reactivity of different monomers, especially the use of chlorosilanes, it is easy to produce large pieces of gel during the preparation process, resulting in irregular shapes of the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/06
Inventor 杨凤金峰李晓鹏
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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