Preparation method of hydrophobic ultrafine silicon dioxide for coating agent

A technology of ultra-fine silica and silica, applied in chemical instruments and methods, coatings, dyeing organosilicon compound treatment, etc., can solve problems such as inability to bond

Inactive Publication Date: 2017-08-04
德清美联新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own characteristics, the catalyst cannot be effectively and firmly combined with the plasma oxidation environmental pro

Method used

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  • Preparation method of hydrophobic ultrafine silicon dioxide for coating agent
  • Preparation method of hydrophobic ultrafine silicon dioxide for coating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of the hydrophobic superfine silicon dioxide that is used for coating agent, this preparation method comprises the steps:

[0021] (1) Put 5Kg of dry powdered precipitated silica with a particle size of 8 μm to 12 μm and 5 Kg of dry powdered precipitated silica with a particle size of 3 μm to 7 μm in a glass container and mix evenly;

[0022] (2) Mix 2% formic acid aqueous solution and methanol according to the ratio of 2:5 by weight to obtain a formic acid-methanol mixture, slowly pour the formic acid-methanol mixture into a glass container, the weight of the formic acid-methanol mixture is two different particle sizes 15% by weight of the silicon oxide mixture, kept stirring for 30 minutes;

[0023] (3) The hydrophobically modified silane coupling agent 3-aminopropyltriethoxysilane is atomized, and then evenly sprayed into the glass container by the atomization reactor, and the addition amount of the hydrophobically modified silane couplin...

Embodiment 2

[0028] A kind of preparation method of the hydrophobic superfine silicon dioxide that is used for coating agent, this preparation method comprises the steps:

[0029] (1) Put 10Kg of dry powdered sol-gel method silica with a particle size of 8 μm to 12 μm and 5 Kg of dry powdered sol-gel method silica with a particle size of 3 μm to 7 μm in a glass container and mix evenly;

[0030] (2) Mix 2% formic acid aqueous solution and methanol according to the weight ratio of 1:6 to obtain a formic acid-methanol mixture, slowly pour the formic acid-methanol mixture into a glass container, the weight of the formic acid-methanol mixture is two different particle sizes 20% by weight of the silicon oxide mixture, kept stirring for 20 minutes;

[0031] (3) Atomize the hydrophobically modified silane coupling agent N-(2-aminoethyl-3-aminopropyl)methyldimethoxysilane, and then evenly spray it into the glass container through the atomization reactor, The addition amount of the hydrophobically...

Embodiment 3

[0036] A kind of preparation method of the hydrophobic superfine silicon dioxide that is used for coating agent, this preparation method comprises the steps:

[0037] (1) Put 5Kg of dry powdered precipitated silica with a particle size of 8 μm to 12 μm and 10 Kg of dry powdered sol-gel silica with a particle size of 3 μm to 7 μm in a glass container and mix evenly;

[0038] (2) Mix 2% formic acid aqueous solution and methanol according to the ratio of 1:8 by weight to obtain a formic acid-methanol mixture, slowly pour the formic acid-methanol mixture into a glass container, the weight of the formic acid-methanol mixture is two different particle sizes 25% by weight of the silicon oxide mixture, kept stirring for 40 minutes;

[0039] (3) Atomize the hydrophobically modified silane coupling agent 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, and then evenly spray it into the glass container through the atomization reactor, and then hydrophobically modify The amount of the silane...

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Abstract

The invention discloses a preparation method of hydrophobic ultrafine silicon dioxide for a coating agent. The preparation method includes steps: (1) well mixing dry powdered silicon dioxide being 8-12micron in particle size and dry powdered silicon dioxide being 3-7micron in particle size in a glass container; (2) mixing formic acid aqueous solution being 2% in weight percent with methyl alcohol, slowly pouring formic acid and methyl alcohol mixed solution into the glass container, and keeping stirring for 20-40min; (3) atomizing a hydrophobic modified silane coupling agent, uniformly spraying into the glass container, and stirring at a constant speed to allow complete reaction of raw materials for 30-60min at a reaction temperature of 40-70 DEG C; (4) hermetically placing reaction products, and ageing for 3-6h; (5) drying the aged materials, and performing airflow ultrafine grinding to obtain a finished product. The preparation method of hydrophobic ultrafine silicon dioxide for the coating agent has the advantage that an uneven state is achieved while a hydrophobic property of silicon dioxide on the surface of the coating agent is realized.

Description

technical field [0001] The invention relates to a method for preparing hydrophobic ultrafine silicon dioxide used in coating agents, and belongs to the technical field of coating agents. Background technique [0002] Smog has become a major problem affecting and perplexing the work and life of our country and the people. Our country also attaches great importance to the problem of smog, and conducts multi-faceted control and governance from technical, material and policy aspects. According to the investigation and research conducted by the Ministry of Environmental Protection, the main substances of smog include sulfide and nitrate. The sources of these substances mainly include coal-fired heating in people's lives, automobile exhaust, and flue gas emitted by various thermal power plants and industrial boilers. [0003] At present, there is a kind of plasma oxidation environmental protection equipment combined with a catalyst, which is suitable for treating sulfur-containi...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09C1/28C09C3/08C09C3/12
CPCC09C1/28C09C3/006C09C3/08C09C3/12C09D7/62
Inventor 蔡烈
Owner 德清美联新材料科技有限公司
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