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Nano self-crosslinked acrylate paint for external wall and method for making same

A technology of acrylate and exterior wall coatings, applied in the field of coating compositions, which can solve the problems of small cracks, poor water resistance, and poor pollution resistance of coatings

Inactive Publication Date: 2005-06-29
上海梅盛企业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of coating has good light aging resistance, scrub resistance and corrosion resistance, but usually has poor water resistance, becomes brittle at low temperature, and becomes sticky at high temperature. The coating itself is prone to small cracks and poor pollution resistance. Well, the general service life is about 5 years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Synthetic nano-acrylic latex with a solid content of about 35%. First prepare mixed monomers, the ratio is: methyl methacrylate, 8.8g, butyl acrylate, 13.4g, N-methylolacrylamide, 1.4g, ethylene glycol methacrylate, 0.8g. The initial microemulsion consists of 0.5g mixed monomers, 0.2g n-pentanol (1-pentanol), 1.4wt% SDS and 0.2wt% 1-pentanol, 2mM APS and 2mM TMEDA, 46.6g H 2 0, the reaction was initiated at 40° C., then 24.6 g of mixed monomers were added dropwise to the reacting microemulsion, and the addition was completed in 5 hours, and then reacted for 1 hour to end the reaction. D of polymer microlatex n at 31nm (D v / D n =1.5) or so.

[0019] Self-crosslinking silicon-containing acrylate emulsion is prepared by ordinary emulsion polymerization, the solid content is about 50%, and the initiator is KPS / FeSO 4 , the emulsifier is CO-436, the pH value of the prepared emulsion is about 5-6, the silicon-containing monomer is methacryloyltrimethoxysilane, the conte...

Embodiment 2

[0024] Synthesis of nanometer acrylate latex: the method is the same as in Example 1 to prepare nanometer polymer latex with a solid content of about 35%. Replace the N-methylolacrylamide in the monomer with methacryloyltrimethoxysilane, and the D of the polymer microlatex n at 38nm (D v / D n =1.5) or so.

[0025] The self-crosslinking silicon-containing acrylate emulsion was prepared by the common emulsion polymerization method as in Example 1.

[0026] Preparation of nano-inorganic dispersion: take by weighing 25 grams of nano-silica produced by Cabot Company, 25 grams of nano-titanium dioxide, add 0.4 gram of sodium polyacrylate dispersant, 50 grams of water, disperse for 2 hours with a high-speed emulsifier, and then ball mill with a ball mill After 3 hours, a stable nano-dispersion was obtained.

[0027] Preparation of pigment paste: Weigh 50 grams of rutile titanium dioxide, 40 grams of calcium carbonate, 20 grams of zinc oxide, 30 grams of talcum powder, 2 grams of ...

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Abstract

The invention relates to a method to prepare a new hydrophilic coating for outside wall containing nmself-crosslinking acrylic ester latices and nm inorganic powder. Its dispensation is:nm indoor crosslinking acrylic ester latex(5-40%), indoor crosslinking acrylic ester latex(20-50%),inorganic nm powder(0.1-20%),inorganic filler(10-50%),film-forming assistant(0.05-5.0%) and the other is water without ion. Its preparing method is:firstly use high speed dispersion and sand grinding method to prepare nm disperseion and filler color which are then mixed with nm self-crosslinking acrylic ester latex and general acrylic ester latex, add into assistant and stir them by media-low speed for 0.5-1.5h,filter and package. The coating has good stability and film-forming performance,strong adhesive force and resistance to pollution, outstanding thermo insulating property, as well as self-cleaning performance.

Description

technical field [0001] The invention relates to a paint composition, in particular to a preparation method of a self-crosslinking exterior wall paint compounded by nano organic materials and nano inorganic materials. Background technique [0002] The invention relates to a coating, in particular to a high weather resistance exterior wall coating. In the prior art, most exterior wall paints use styrene-acrylic emulsion, pure acrylic emulsion or elastic pure acrylic emulsion as the base material, combined with appropriate inorganic pigments and fillers, to prepare water-based paints. This type of coating has good light aging resistance, scrub resistance and corrosion resistance, but usually has poor water resistance, becomes brittle at low temperature, and becomes sticky at high temperature. The coating itself is prone to small cracks and poor pollution resistance. Well, the general service life is about 5 years. [0003] Due to the surface effect, small size effect, quantum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/06
Inventor 吴则嘉张林春
Owner 上海梅盛企业发展有限公司
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