Ultraviolet-proof exterior wall coating and preparation method therefor

A technology for exterior wall coating and UV protection, applied in coatings and other directions, can solve the problem of unsolved compatibility between nano-titanium dioxide and polymers, and achieve environmental protection and construction safety, excellent stability, and enhanced hardness. Effect

Active Publication Date: 2015-11-04
HEBEI CARPOLY PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the combination of hydrotalcite and nano-titanium dioxide will enhance the anti-ultraviolet performance of nano-titanium dioxide, the compatibility problem between nano-titanium dioxide and polymers is still unsolved

Method used

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  • Ultraviolet-proof exterior wall coating and preparation method therefor
  • Ultraviolet-proof exterior wall coating and preparation method therefor
  • Ultraviolet-proof exterior wall coating and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In terms of parts by mass, the formula of the anti-ultraviolet exterior wall paint consists of:

[0056]

[0057] Prepare UV-resistant exterior paints as follows:

[0058] (1) Preparation of Nano Titanium Dioxide / Acrylic Ester Polymer Composite Emulsion

[0059] 1) Preparation of modified nano titanium dioxide

[0060] In terms of parts by mass, mix 5 parts of nano-titanium dioxide with 200 parts of ethanol, 800W ultrasonic dispersion for 35 minutes, add 5 parts of vinyltriethoxysilane, react at 80°C for 6 hours, centrifuge, wash with absolute ethanol, centrifuge and wash Repeat 3 times, and bake at 100° C. for 12 hours to obtain modified nano-titanium dioxide.

[0061] 2) Preparation of nano-titanium dioxide / acrylate polymer composite emulsion

[0062] In terms of parts by mass, 5 parts of modified nano-titanium dioxide were dispersed in a mixed solution of 25 parts of acrylamide, 25 parts of butyl acrylate and 2 parts of cetyl alcohol, ultrasonically dispersed a...

Embodiment 2

[0069] In terms of parts by mass, the formula of the anti-ultraviolet exterior wall paint consists of:

[0070]

[0071] Prepare UV-resistant exterior paints as follows:

[0072] (1) Preparation of Nano Titanium Dioxide / Acrylic Ester Polymer Composite Emulsion

[0073] 1) Preparation of modified nano titanium dioxide

[0074] In terms of parts by mass, mix 3.2 parts of nano-titanium dioxide with 150 parts of isopropanol, disperse with 400W ultrasonic for 20 minutes, add 1.2 parts of vinyltrimethoxysilane, react at 70°C for 3.5h, centrifuge, wash with absolute ethanol, and centrifuge 1. Washing was repeated 3 times, and the modified nano titanium dioxide was obtained after drying at 50° C. for 24 hours.

[0075] 2) Preparation of nano-titanium dioxide / acrylate polymer composite emulsion

[0076] In terms of parts by mass, 3.2 parts of modified nano-titanium dioxide were dispersed in a mixed solution of 40 parts of methyl methacrylate and 1.8 parts of hexadecane, 500W ultr...

Embodiment 3

[0083] In terms of parts by mass, the formula of the anti-ultraviolet exterior wall paint consists of:

[0084]

[0085]

[0086] Prepare UV-resistant exterior paints as follows:

[0087] (1) Preparation of Nano Titanium Dioxide / Acrylic Ester Polymer Composite Emulsion

[0088] 1) Preparation of modified nano titanium dioxide

[0089] In terms of parts by mass, mix 2.25 parts of nano-titanium dioxide with 110 parts of methanol, 600W ultrasonic dispersion for 10 minutes, add 2.25 parts of γ-methacryloxypropyltrimethoxysilane, react at 60°C for 3.5h, centrifuge, and use Washing with absolute ethanol, centrifugation and washing were repeated 3 times, and drying at 75° C. for 18 hours to obtain modified nano titanium dioxide.

[0090] 2) Preparation of nano-titanium dioxide / acrylate polymer composite emulsion

[0091] In terms of parts by mass, 2.25 parts of modified nano-titanium dioxide were dispersed in a mixed solution of 20 parts of acrylate, 14.1 parts of tert-butyl...

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Abstract

The invention discloses ultraviolet-proof exterior wall coating and a preparation method therefor. The preparation method comprises: coating a nano titanium dioxide surface with a layer of acrylate polymer to obtain nano titanium dioxide / acrylate polymer to obtain compound emulsion; and then, sufficiently mixing the compound emulsion with acrylate polymer exterior wall emulsion to obtain mixed emulsion, and adding pigments, auxiliaries and water into the mixed emulsion. According to the coating, the nano titanium dioxide surface is coated with one layer of acrylate polymer, so that dispersion and stability of nano titanium dioxide in coating are remarkably improved, and therefore, nano titanium dioxide aggregates are avoided, and anti-ultraviolet property of the aggregates is greatly reduced or even avoided. The coating not only has characteristics such as excellent water resistance, excellent alkali resistance, excellent scrubbing resistance and the like of the acrylate polymer exterior wall coating, but also has improved hardness and anti-ultraviolet property, so that the service life of the coating is prolonged; and the preparation method is simple, low in production cost and beneficial for industrial production.

Description

technical field [0001] The invention relates to an exterior wall coating, in particular to an anti-ultraviolet exterior wall coating and a preparation method thereof; it belongs to the technical field of material synthesis and coating preparation technology. Background technique [0002] Light, heat, water, oxygen, inorganic salts, organic solvents and pollutants in the environment are the main factors that promote the degradation of film-forming substances. Among these factors, solar ultraviolet radiation is the most important and most common factor leading to the degradation of film-forming substances. From the moment the exterior wall paint is used, it begins its irreversible degradation process. Therefore, it is necessary to enhance the anti-ultraviolet performance of exterior wall coatings. The simplest and most effective method is to add additives with anti-ultraviolet properties to exterior wall coatings, mainly organic ultraviolet shielding agents and inorganic ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D133/04C09D7/12
Inventor 张心亚汪春玲
Owner HEBEI CARPOLY PAINT CO LTD
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