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Preparation method of sol-gel based interior wall paint containing needle-like wollastonite

A needle-shaped wollastonite and interior wall coating technology, which is applied in the direction of coating, etc., can solve the problems of not too thick coating thickness and cracking, and achieve the effect of solving cracking, improving cracking resistance and excellent performance

Pending Publication Date: 2020-04-07
JIANGXI GUANGYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the coating prepared by the sol-gel method should not be too thick, because the

Method used

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  • Preparation method of sol-gel based interior wall paint containing needle-like wollastonite

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Experimental program
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Effect test

Embodiment 1

[0033] The wollastonite concentrate with a calcium silicate content of 93% is crushed, washed, and sent to a ring roller mill for dry grinding to a coarse powder of 300-400 mesh, and the coarse powder is blended with water into a slurry with a solid content of 72%. Add 3‰ sodium polyacrylate during the pulping process, pump the slurry to a vertical wet stirring mill for grinding, add 3‰ sodium polyacrylate during the grinding process, grind for 60 minutes, and flash dry the slurry into Powder, the secondary classification of powder is D 97 ≤1.8um ultrafine wollastonite powder. Take 50g of ultra-fine wollastonite and water to prepare a slurry with a solid content of 15%, add 50g of alkaline silica sol dropwise to the slurry, stir for 5 minutes to obtain wollastonite-silica sol composite glue. Weigh 20g of PVA solid in another container, add 180g of water and stir until the PVA is completely dissolved, add 7g of silica sol, 0.18g of defoamer and 4g of crosslinking agent dropwis...

Embodiment 2

[0035] The wollastonite concentrate with a calcium silicate content of 93% is crushed, washed, and sent to a ring roller mill for dry grinding to a coarse powder of 300-400 mesh, and the coarse powder is blended with water into a slurry with a solid content of 72%. Add 3‰ sodium polyacrylate during the slurry mixing process, pump the slurry to a vertical wet stirring mill for grinding, add 3‰ sodium polyacrylate during the grinding process, grind for 60 minutes, and flash dry the slurry into Powder, the secondary classification of powder is D 97 ≤1.8um ultrafine wollastonite powder. Take 40g of ultra-fine wollastonite and water to prepare a slurry with a solid content of 20%, add 40g of alkaline silica sol dropwise to the slurry, and stir for 5 minutes to obtain a wollastonite-silica sol composite glue. Weigh 15g of PVA solid in another container, add 120g of water and stir until the PVA is completely dissolved, add 5g of silica sol, 0.12g of defoamer and 3g of crosslinking a...

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Abstract

The invention relates to a preparation method of a sol-gel based interior wall paint containing needle-like wollastonite. The method includes: blending 300-400mesh wollastonite coarse powder into a slurry, and under the condition that a dispersing agent is added, conducting vertical wet grinding to obtain a slurry of certain fineness; carrying out flash drying on the slurry, and carrying out secondary classification through a classifier to obtain ultrafine wollastonite powder; blending the ultrafine wollastonite powder and water into a wollastonite solution, adding silica sol dropwise into thewollastonite solution to prepare a wollastonite-silica sol composite glue; dissolving PVA solid with water to prepare a PVA solution; adding silica sol, a defoaming agent and a cross-linking agent dropwise into the PVA solution, and performing stirring to obtain a uniform semitransparent PVA-silica sol composite glue; adding the wollastonite-silica sol system into the PVA-silica sol system, and performing stirring until gelatination of the wollastonite-silica sol/PVA-silica sol composite hydrosol; and spraying the gelatinized composite sol to the surface of a base material, and performing natural drying to form a film. The method provided by the invention utilizes repeated grading system for ultrafining of wollastonite, and combines sol-gel technology to solve the defect of non-uniform dispersion of wollastonite in paint.

Description

technical field [0001] The invention relates to a preparation method of a sol-gel based interior wall paint containing acicular wollastonite, which belongs to the technical field of paint. Background technique [0002] Sol-gel technology (Sol-Gel) has broad application prospects in the preparation of functional materials, thin films, and ultrafine powders, especially in the preparation of organic / inorganic hybrid materials, which can combine the advantages of inorganic materials and organic polymers. Excellent performance, overcoming the shortcomings of traditional organic polymers. After decades of development, this technology has become one of the methods for preparing multifunctional coatings. This method firstly mixes the inorganic and organic precursors uniformly in the solution, then hydrolyzes and condenses to form a sol, and then makes the sol form a three-dimensional space network structure and transforms it into a coagulated coating. The organic-inorganic hybrid c...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D7/61
CPCC08K2201/014C09D129/04C09D7/61C09D7/70C08L33/02C08K3/36C08K7/26
Inventor 吴平飞温声平彭鹤松袁斌徐永华宋波
Owner JIANGXI GUANGYUAN CHEM