Surfactant for dry grinding-assisted modification of silica powder and preparation method of surfactant

A surfactant and silicon micropowder technology, applied in chemical instruments and methods, silicone organic compounds, dyed organic silicon compound treatment, etc. It can improve the efficiency of dry grinding, improve mechanical and electrical properties, and reduce energy consumption.

Pending Publication Date: 2020-04-14
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no specific grinding aid modified surfactant on the market, which is suitable for the dry grinding process of silica powder, and takes into account the functions of grinding aid and modification at the same time; silane surfactants can be used as grinding aids, but due to their The molecular chain is short, the steric hindrance effect is not enough, and the grinding aid and dispersion effect are not obvious in the ultrafine grinding process. In addition, its hydrophobic group only contains one functional functional group, which cannot be suitable for various resin systems at the same time.

Method used

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  • Surfactant for dry grinding-assisted modification of silica powder and preparation method of surfactant
  • Surfactant for dry grinding-assisted modification of silica powder and preparation method of surfactant
  • Surfactant for dry grinding-assisted modification of silica powder and preparation method of surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Taking epoxy-aminosilane co-modified hydroxyl-terminated silicone oil as an example:

[0025] (1) Preparation of ethanol solution of 3-(2,3-epoxypropoxy)propylmethyldimethoxysilane: take 4.0mol 3-(2,3-epoxypropoxy)propylmethyldimethylsilane Add oxysilane to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid solution to adjust the pH to 3, stir slowly and uniformly for 2 hours, then add 5ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0026] (2) Preparation of EtOH solution of γ-aminopropylmethyldimethoxysilane: Take 4mol γ-aminopropylmethyldimethoxysilane and add it to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid Adjust the pH of the acetic acid solution to 3, stir slowly and uniformly for 2 hours, then add 5ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0027] (3) Ether diluent of low-viscosity hydroxyl-terminated silicone oil: Take 1.0mol of low-vis...

Embodiment 2

[0030] Embodiment 2: Taking epoxy-ethylene silane co-modified hydroxyl-terminated silicone oil as an example:

[0031] (1) Preparation of EtOH solution of 3-(2,3-epoxypropoxy)propylmethyldimethoxysilane: take 5.0mol 3-(2,3-epoxypropoxy)propylmethyldimethylsilane Add oxysilane to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid solution to adjust the pH to 3, stir slowly and uniformly for 2 hours, then add 80ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0032] (2) Preparation of EtOH solution of vinylmethyldimethoxysilane: Take 4mol γ-aminopropylmethyldimethoxysilane and add it to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid solution to adjust the acetic acid The pH of the solution is 3, stir slowly and uniformly for 2 hours, then add 80ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0033] (3) Ether diluent of low-viscosity hydroxyl-terminated silicone oil: Take 1.0...

Embodiment 3

[0036] Embodiment 3: Taking epoxy-vinyl-aminosilane co-modified hydroxyl-terminated silicone oil as an example:

[0037] (1) Preparation of EtOH solution of 3-(2,3-epoxypropoxy)propylmethyldimethoxysilane: take 4.0mol 3-(2,3-epoxypropoxy)propylmethyldimethylsilane Add oxysilane to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid solution to adjust the pH to 3, stir slowly and uniformly for 2 hours, then add 60ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0038] (2) Preparation of EtOH solution of vinylmethyldimethoxysilane: Take 2mol γ-aminopropylmethyldimethoxysilane and add it to 1000ml 5% EtOH (volume ratio) aqueous solution, slowly add acetic acid solution to adjust the acetic acid The pH of the solution is 3, stir slowly and uniformly for 2 hours, then add 60ml of 1,2-octanediol, continue to stir slowly for 30 minutes, and set aside;

[0039] (3) Preparation of EtOH solution of γ-aminopropylmethyldimethoxysilane: Take ...

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PUM

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Abstract

The invention relates to a surfactant for dry grinding-assisted modification of silica powder, which is characterized in that the surfactant has the following structure: R is alkanes, the number n ofchain segments is x + y + z, n is more than or equal to 4 and less than or equal to 12, and A and B groups are any one of epoxy groups, amino groups and vinyl groups. The preparation method has the advantages that 1, the surfactant prepared by the preparation method has grinding aid and modification effects, the dry grinding efficiency can be improved, the energy consumption is reduced, and the problem that the particle size limit is difficult to reach due to agglomeration of ultrafine particles is solved; the silicon micro-powder can be subjected to surface modification, so that the silicon micro-powder has good compatibility with various resin systems, and the mechanical and electrical properties of the terminal composite material are improved while the use amount of the resin is reduced; and 2, the preparation method is simple to operate, the condition parameters are easy to control, and no pollution is caused to the environment;

Description

technical field [0001] The invention belongs to the technical field of powder surface modification, relates to the technical field of silicon micropowder dry method modification, in particular to a surfactant for dry method grinding modification of silicon micropowder and a preparation method thereof. Background technique [0002] Microsilica powder is a non-toxic, odorless, non-polluting inorganic non-metallic material. It has excellent properties such as good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, stable chemical properties, and high hardness. It is widely used in chemical industry, electrical and electronics, functional plastics, functional coatings, functional rubber and other fields. The processing technology of microsilica powder includes dry method and wet method. Considering the economic cost and quality stability, for the requirement of D100≥5um particle size index, dry grinding-classi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08C07F7/20C09C1/28C09C3/12C08G77/38
CPCC07F7/087C07F7/20C07F7/0874C09C1/28C09C3/12C08G77/045
Inventor 李佩悦彭寿马立云吴建新谢恩俊周新军任子杰高惠民
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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