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Preparation method of organic silicon microcapsule powder waterproof agent

An organosilicon and water repellent technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of condensation reaction, stabilization difficulties, poor stability of liquid water repellants, etc., to improve water resistance and hydrophobicity Effect

Inactive Publication Date: 2011-10-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, silicone waterproofing agents are mainly in liquid form such as emulsions or microemulsions. Liquid waterproofing agents have disadvantages such as poor stability and difficult transportation and storage. very difficult to exist
In addition, liquid waterproofing agents cannot be used in dry powder products, such as the dry powder mortar that has flourished in recent years.

Method used

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  • Preparation method of organic silicon microcapsule powder waterproof agent
  • Preparation method of organic silicon microcapsule powder waterproof agent
  • Preparation method of organic silicon microcapsule powder waterproof agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Add solid polyvinyl alcohol into water at room temperature while stirring, and heat the water to about 70°C for about 30 minutes to dissolve, then cool to room temperature with a concentration of 2%;

[0049] (2) Select nano-calcium carbonate as the inorganic mineral filler; compound polydimethylsiloxane and isobutyltriethoxysilane at a mass ratio of 3:97 to form a complex high-efficiency silicone waterproofing agent occupying silicone microparticles. 63% of the total mass of the capsule powder; add nano-calcium carbonate, which accounts for 15% of the total mass of the high-efficiency silicone waterproofing agent, to the composite waterproofing agent, and then put it in an ultrasonic disperser for 15 minutes to make a uniform dispersion;

[0050] (3) The polyvinyl alcohol aqueous solution prepared by step (1) is added in the dispersion of (4), so that the polyvinyl alcohol polymer accounts for 28% of the total mass of the organosilicon microcapsule powder, and place...

Embodiment 2

[0057] (1) Add solid polyvinyl alcohol into water at room temperature while stirring, and heat the water to about 70°C for about 30 minutes to dissolve, then cool to room temperature with a concentration of 8%;

[0058] (2) Nano-metakaolin is selected as the mineral filler; polydimethylsiloxane and octyltriethoxysilane are compounded into a complex high-efficiency silicone water repellent at a mass ratio of 50:50. In this embodiment, organic The specific dosage of the silicon water repellent accounts for 66.7% of the total mass of the silicone microcapsule powder water repellent; then weigh the nano-metakaolin which accounts for 18% of the total mass of the high-efficiency water repellent, add it to the water repellant, and then put it into an ultrasonic disperser for 30 minutes to prepare into a uniform dispersion;

[0059] (3) the polyvinyl alcohol aqueous solution prepared by step (1) is added in the dispersion system of (2), so that the polyvinyl alcohol polymer accounts f...

Embodiment 3

[0065] (1) Add solid polyvinyl alcohol into water at room temperature while stirring, and heat the water to about 70°C for about 30 minutes to dissolve, then cool to room temperature with a concentration of 20%;

[0066] (2) select nano-silica as the inorganic mineral filler; select butyltriethoxysilane as an efficient organosilicon waterproofing agent, and the specific consumption of the organosilicon waterproofing agent accounts for 1 / 3 of the total mass of the organosilicon microcapsule powder waterproofing agent in the present embodiment 54%; Add nano-silica, which accounts for 8% of the total mass of high-efficiency silicone water repellent, into the water repellent, and then put it into an ultrasonic disperser for 15 minutes to make a uniform dispersion;

[0067] (3) Add the polyvinyl alcohol aqueous solution prepared by step (1) into the dispersion of (2) again, so that the polyvinyl alcohol polymer accounts for 42% of the total mass of the organic silicon microcapsule p...

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Abstract

The invention belongs to the fields of waterproofing of buildings and solid powdering and relates to a preparation method of an organic silicon microcapsule powder waterproof agent. The preparation method comprises the following steps: preparing water-soluble high polymer wall material into a water solution; mixing a superfine inorganic mineral filler with an organic silicon high-efficient waterproof agent according to a certain proportion for forming homogeneous dispersion; adding a polymer solution and other auxiliaries into the dispersion and dispersing for forming a homogeneous, stable and dry dispersion liquid; performing spray-drying on the uniform and stable dispersion liquid for getting organic silicon waterproof agent microcapsule powder with a certain fineness; and collecting a product, sealing and preserving. The adopted water-soluble polymer film-forming wall material, the inorganic filler and the organic silicon high-efficient waterproof core material have good performances and have no adverse effects on the performances of basic materials, the adopted equipment is easy to operate and the prepared organic silicon powder is white; the organic silicon microcapsule powder waterproof agent has excellent water repellency and water vapor permeability; the organic silicon microcapsule powder waterproof agent can be re-dispersed and has excellent workability with water; and the solvent-free design is healthy and environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of building waterproofing and solid powdering, and relates to a preparation method of an organosilicon microcapsule powder waterproofing agent. Background technique [0002] It is well known that silicone polymers have two most notable characteristics: low surface tension and high oxidation resistance. Low surface tension will produce excellent hydrophobicity, and high oxidation resistance makes organosilicon compounds resistant to oxygen, ozone and ultraviolet light. Organosilicon compounds have become the main materials for hydrophobic treatment of building materials, especially silane / polysiloxane organosilicon compounds with certain reactive groups. When these organosilicon materials are painted on the surface of silicate substrates or mixed into their mixtures, siloxanes with reactive groups can not only form a network of hydrophobic silicones through the interaction of active groups alkane film, and ...

Claims

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Application Information

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IPC IPC(8): C09K3/18B01J13/04
CPCC04B20/1051C04B14/022C04B14/06C04B14/28C04B20/0092C04B20/1029C04B20/1033C04B20/1048C04B2103/40C04B2103/402C04B2103/404C04B2103/406
Inventor 张雄张永娟夏小丹
Owner TONGJI UNIV
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