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Preparation method of hydrophobic silica powder

A technology of silicon micropowder and hydrophobicity is applied in the field of preparation of hydrophobic silicon micropowder, which can solve the problems of easy agglomeration and unsatisfactory modification effect, and achieve the effects of improving dispersibility, improving effect and solving poor compatibility.

Active Publication Date: 2021-07-23
JIANGSU NOVORAY NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method is to directly add the silane coupling agent to the powder for modification, the modification effect is not ideal, and the powder is still easy to agglomerate when mixed with the resin

Method used

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  • Preparation method of hydrophobic silica powder
  • Preparation method of hydrophobic silica powder
  • Preparation method of hydrophobic silica powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The 1.5 kg of silicon fine powder was added to a high-speed mixed modifier, and the temperature was provided to 100 ° C, preheating for 30 min, and the atomized pressure was 0.5 MPa, and the Y9669 mixture of pre-water was added (7.5 g coupling agent, 7.5 g of isopropion) Alcohols and 15 g of deionized water, hydrolysis time of 30 min, hydrolyzed pH of 7.5), modified 20 min, resulting in high phase hydrophobic silicon fine powder for epoxy resin.

Embodiment 2

[0037] 1.5kg silicon fine powder was added to a high-speed mixed modifier, and the temperature was set to 110 ° C, preheating for 30 min, and the atomized pressure was 0.5 MPa, and the Y9669 mixture of pre-water was added (7.5 g coupling agent, 7.5 g isopropad Alcohols and 15 g of deionized water, hydrolysis time 30 min, hydrolyzed pH of 7.5), modified 20 min, resulting in high phase hydrophobic silicon fine powder for epoxy resin.

Embodiment 3

[0039] The 1.5 kg of silicon fine powder was added to a high-speed mixed modifier, and the temperature was provided to 100 ° C, preheating for 30 min, and the atomized pressure was 0.5 MPa, and the Y9669 mixture of pre-water was added (7.5 g coupling agent, 7.5 g of isopropion) Alcohols and 15 g of deionized water, hydrolysis time 30 min, hydrolyzed pH 8.5), modified 20 min to obtain a high phase hydrophobic silicon fine powder for epoxy resin.

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PUM

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Abstract

The invention discloses a preparation method of hydrophobic silica powder. The method comprises the following steps: mixing a silane coupling agent N-phenyl gamma-aminopropyltrimethoxysilane, isopropanol and water, carrying out a hydrolysis reaction to obtain a silane coupling agent hydrolysate, atomizing the silane coupling agent hydrolysate by using an atomizer, mixing the atomized silane coupling agent hydrolysate with silica powder, and carrying out a modification reaction to obtain the hydrophobic silica powder. The method is simple in process, the prepared modified silica powder is high in activity, good in hydrophobicity and low in surface hydroxyl, and when the modified silica powder is applied to epoxy resin, the viscosity of the epoxy resin can be greatly reduced, and the dispersity of the epoxy resin in the resin is improved.

Description

Technical field [0001] The present invention belongs to the field of inorganic material, and is related to the preparation method of hydrophobic silicon fine powder. Background technique [0002] Silicon fine powder is used as a temperature resistance, acid-based corrosion, high thermal conductivity, high insulated inorganic non-metallic materials, is widely used in chemical, electronics, integrated circuits, electrical, plastic, coatings, advanced paints, rubber, defense Equisical fields. With the continuous development of the downstream high-end application market, the quality and stability requirements of non-metallic mineral powder materials are continuously improved. [0003] Due to the small particle size of the silicon fine powder, the surface can be high, easy to reunite, and affects subsequent use. The problem of solving its agglomeration by surface modification of silicon fine powder. For example, China Patent Application CN107841186A discloses a method of modifying sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K3/36C08L63/00
CPCC08K9/06C08K3/36C08L63/00
Inventor 李晓冬曹家凯孙小耀周垒郭登峰朱刚
Owner JIANGSU NOVORAY NEW MATERIAL CO LTD
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