Preparation method of organosilicon powder waterproofing agent

A technology of organosilicon powder and water repellent, which is applied in the chemical field to achieve the effects of good workability, excellent hydrophobicity and simple production process

Inactive Publication Date: 2011-11-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for preparing silicone

Method used

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  • Preparation method of organosilicon powder waterproofing agent
  • Preparation method of organosilicon powder waterproofing agent
  • Preparation method of organosilicon powder waterproofing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Dissolve the film-forming substance polyvinyl alcohol powder in water at room temperature, and add it into the water while stirring. If the dissolution is not complete, heat it to 50°C, preferably 70°C, and the dissolution time is about 30min, then cool to At room temperature, it remains in a solution state with a mass fraction of 3%.

[0044] (2) The nano-calcium carbonate is prepared into ethanol suspension, and the mass ratio of calcium carbonate and ethanol is 1:2.

[0045] Mix the nano-calcium carbonate carrier and the octyltriethoxysilane waterproofing agent to form a uniform binary dispersion, wherein the quality of the nano-calcium carbonate is 8% of the mass of the octyltriethoxysilane waterproofing agent, and the stirring speed is 600r / min , stirring time 30min.

[0046] (3) Add a polyvinyl alcohol aqueous solution with a mass fraction of 3% to the binary dispersion of the nanometer calcium carbonate carrier-octyltriethoxysilane high-efficiency waterproof...

Embodiment 2

[0052] (1) Dissolve the film-forming substance polyvinyl alcohol powder in water at room temperature, and add it into the water while stirring. If the dissolution is not complete, heat it to 50°C, preferably 70°C, and the dissolution time is about 30min, then cool to At room temperature, it remains in a solution state with a mass fraction of 5%.

[0053] (2) The nano-calcium carbonate is prepared into ethanol suspension, and the mass ratio of calcium carbonate and ethanol is 1:3.

[0054] Mix the nano-calcium carbonate carrier and the polydimethylsiloxane waterproofing agent to form a uniform binary dispersion, wherein the quality of the nano-calcium carbonate is 15% of the mass of the polydimethylsiloxane waterproofing agent, and the stirring speed is 900r / min , stirring time 45min.

[0055] (3) Add polyvinyl alcohol aqueous solution with a mass fraction of 5% to the binary dispersion of nano calcium carbonate carrier-polydimethylsiloxane high-efficiency waterproofing agent,...

Embodiment 3

[0060] (1) Dissolving the film-forming substance hydroxyethyl cellulose in water at room temperature, and adding it into the water while stirring, the dissolution time is more than 20 minutes, and the mass fraction is 5%.

[0061] (2) Mix the nano-silica carrier with octyltriethoxysilane-polydimethylsiloxane composite high-efficiency waterproofing agent to form a uniform binary dispersion, in which octyltriethoxysilane and polydimethylsiloxane The base siloxane is compounded according to the ratio of 97:3, the nano-silica is 18% of the mass of the waterproofing agent, the stirring speed is 1500r / min, and the stirring time is 1h.

[0062] (3) the hydroxyethyl cellulose aqueous solution that mass fraction is 5% is added in the binary dispersion of nano-silica carrier-octyltriethoxysilane and polydimethylsiloxane composite waterproofing agent, and Stir to form a homogeneous ternary dispersion of hydroxyethyl cellulose film-forming material-nano-silica carrier-octyltriethoxysilane...

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Abstract

The invention belongs to the chemical field, and relates to a preparation method of an organosilicon powder waterproofing agent; the method comprises the following steps: preparing a solution of a water-soluble film-forming substance; stirring and mixing an ultrafine mineral carrier and an organosilicon high-efficient waterproofing agent according to a certain proportion to form a homogeneous binary disperse system; adding the binary disperse system into the solution prepared by the water-soluble film-forming substance, well mixing to form a homogeneous ternary disperse system; performing vacuum drying of the homogeneous ternary disperse liquid to obtain a dried polymer rigid block; cooling to room temperature; pulverizing the obtained dried polymer rigid block to powder with a certain fineness. The equipment used by the invention is simple and easy to operate; the finished product of an organosilicon powder waterproofing material is suitable for the practical application of building waterproofing; the organosilicon waterproofing agent prepared by the invention is white or offwhite powder, and has outstanding waterproofing effect with a low mixing amount; the powder is easy to redisperse, has good water workability, is convenient for practical application, has solvent-free design, and is environment friendly.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a preparation method of an organic silicon powder waterproofing agent. Background technique [0002] The basic structural unit of organosilicon compounds is composed of silicon-oxygen chain links, and the side chains are connected to various other organic groups through silicon atoms. Therefore, the structure of organosilicon compounds contains both "organic groups" and "inorganic structures". This special composition and molecular structure makes organosilicon compounds combine organic characteristics and inorganic functions. This makes organosilicon compounds outstanding in terms of heat resistance, stability and weather resistance. [0003] In addition, the silicone material has a very low surface tension, which can reduce the surface energy of the covered substrate, making it have excellent hydrophobicity; at the same time, it does not close the air-permeable micropores of the ...

Claims

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Application Information

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IPC IPC(8): C04B24/40C04B103/65
CPCC04B24/42C04B24/40
Inventor 张雄张永娟夏小丹
Owner TONGJI UNIV
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