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Silicon acrylic paint

A coating, silicone-acrylic technology, applied in the field of exterior wall coatings, can solve the problems of powder coating deterioration, coating film weather resistance deterioration, coating water resistance and other problems, to prevent migration, excellent performance, water resistance and scrub resistance good effect

Inactive Publication Date: 2005-03-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the silicone acrylic emulsion used in domestic silicone acrylic coatings is generally synthesized with a low molecular weight emulsifier. After the polymerization is completed, it still remains in the emulsion. In the middle, it is easy to migrate to the surface of the coating film, because these emulsifier molecules are easy to absorb moisture, so that the water resistance of the coating is very poor
In addition, these low-molecular-weight emulsifiers are easy to decompose and change color under the action of ultraviolet light, causing the emulsion coating to powder and deteriorate, which to a certain extent leads to poor weather resistance of the coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0008] The preparation of embodiment 1-4 silicone acrylic coating

[0009] The color paste method is used to prepare silicone-acrylic coatings. The formula is shown in Table 1. Water, dispersant, talcum powder, fumed silica, titanium dioxide, barium sulfate, defoamer 1, anti-corrosion, anti-fungal agent and propylene glycol After pre-mixing with a mixer or a kneader, depolymerize and disperse the secondary pigment particles with a sand mill or a colloid mill, and control the sand mill speed to make the particle size below 30 μm; neutralize the silicone acrylic emulsion with ammonia water to pH =8-9, add the ground pigment slurry and defoamer 2, thickener, and film-forming aid, stir evenly at low speed with a mixer, add water to adjust the viscosity, and filter to obtain the silicon compound corresponding to Example 1-4. Acrylic paint.

[0010] component name

[0011] Table 2 and Table 3 are the performances of silicon-acrylic emulsion coatings. The silicon-acrylic e...

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PUM

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Abstract

The invention provides a slicone modified coating synthesized by reactive emulsifying agent especially used for high-grade exterior wall paint, wherein the pigment of the coating employs titanium dioxide powder, talcum powder and barium sulfate, the flowing deformation auxiliary agent employs gaseous phase silicon dioxide, the levelling agent employs propylene glycol, and the thickening agent employs polyacrylates. The coating is prepared by the color paste method.

Description

technical field [0001] The invention relates to a silicone-acrylic paint prepared from a silicone-acrylic emulsion synthesized with a reactive emulsifier, especially for high-grade exterior wall paint. Background technique [0002] Acrylic resin is a high-molecular material with strong adhesion and high film-forming properties, and it has been widely used in the field of domestic coatings. As an exterior wall coating, it must have good weather resistance, but the heat resistance, cold resistance, and solvent resistance of acrylic resin are not ideal; at the same time, the coating has defects such as stickiness and poor stain resistance of the paint film. Its further application in the field of exterior wall coatings. Silicone resin has high flexibility, high temperature resistance, chemical resistance, resistance to ultraviolet light and infrared radiation, resistance to oxidative degradation and other properties; and the surface energy of silicone is low, the coating is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D143/04
Inventor 李玮张黎明陈丽琼刘杰
Owner SUN YAT SEN UNIV
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