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Superclean external wall organic coating for building and preparing method thereof

An organic coating, super self-cleaning technology, applied in the coating and other directions, to achieve the effect of a simple method

Inactive Publication Date: 2005-03-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In German patent DE19921876A1 and Chinese patent 01142643.8, two kinds of organic coatings with self-cleaning function and their preparation methods have been reported through the surface modification of powder, the use of special shape inorganic pigments and fillers and low surface tension hydrophobic agents, both of which only It is limited to the wall dust to achieve self-cleaning effect through rainwater, and there is nothing to do with the oil stains attached to the wall and the dust on the oil stains

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Paint Basic Formula 1

[0027] Raw material dosage (wt%)

[0028] water 25

[0029] Silicone acrylic emulsion 20

[0030] Hydrophobic Auxiliary 4

[0031] Titanium dioxide 17

[0032] Calcite (7μm) 20

[0033] Anatase Nano Dioxide 10

[0034] titanium

[0035] Thickener 0.2~1

[0036] pH adjuster 0.2~1

[0037] Defoamer 0.1~0.5

[0038] Dispersant 0.4

[0039] Coalescent 1.5

[0040] Antifreeze 1

[0041] According to the above formula prepared by the method of exterior wall latex paint, an organic architectural coating for exterior walls with super self-cleaning function can be obtained. The surface contact angle of the coating film to water is ≥122°C, the artificial accelerated aging resistance time is ≥700 hours, the decomposition rate of oil stains is ≥90%, and the performance of other exterior wall latex paints is passed.

example 2

[0043] Paint Basic Formula 2

[0044] Raw material dosage (wt%)

[0045] water 28

[0046] Fluorocarbon emulsion 26

[0047] Hydrophobic Auxiliary 4

[0048] Titanium dioxide 15

[0049] Quartz powder (35μm) 10

[0050] Modified anatase nano-dioxide 5

[0051] titanium

[0052] Wollastonite 10

[0053] Thickener 0.2~1

[0054] pH adjuster 0.2~1

[0055] Defoamer 0.1~0.5

[0056] Dispersant 0.4

[0057] Coalescent 1.5

[0058] antifreeze 1

[0059] The above formula is prepared according to the method of exterior wall latex paint, and an exterior wall organic architectural coating with self-cleaning function can be obtained. The surface contact angle of the coating film to water is ≥130°C, the artificial accelerated aging resistance time is ≥1000 hours, the decomposition rate of oil stains is ≥90%, and the performance of other exterior wall latex paints is passed.

example 3

[0061] Paint Basic Formula 3

[0062] Raw material dosage (wt%)

[0063] water 28

[0064] Fluorocarbon emulsion (containing 5wt% pure acrylic 26

[0065] acrylate emulsion)

[0066] Hydrophobic Auxiliary 3

[0067] Titanium dioxide 15

[0068] Silica fume powder (45μm) 8

[0069] Modified Anatase Titanium Dioxide 3

[0070] Calcite (7μm) 15

[0071] Thickener 0.2~1

[0072] pH adjuster 0.2~1

[0073] Defoamer 0.1~0.5

[0074] Dispersant 0.4

[0075] Coalescent 1.5

[0076] antifreeze 1

[0077] The above formula is prepared according to the general method of exterior wall latex paint, and an exterior wall organic architectural coating with self-cleaning function can be obtained. The surface contact angle of the coating film to water is ≥150°C, the artificial accelerated aging resistance time is ≥1000 hours, the decomposition rate of oil stains is ≥90%, and the performance of other exterior wall latex paints is passed.

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Abstract

The present invention relates to an organic coating material with super-self-cleaning function for external wall and its preparation method. Said invention selects inorganic pigment filling material with a certain size and form, hydrophobic adjuvant with low surface tension and nano titanium dioxide photocatalyst, and utilizes the properly-proportional mixing of emulsion base material, pigment filling material and adjuvant to obtain the invented product. Its preparation method is simple and low in cost.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and relates to a super self-cleaning organic paint for external wall construction and a preparation method thereof. Background of the invention [0002] With the continuous and stable growth of my country's economy and the continuous improvement of people's living standards, the construction and decoration industry is developing rapidly, and the annual demand for domestic building exterior wall coatings can reach more than 2 million tons. However, the typical disadvantages of exterior wall architectural coatings at home and abroad are poor stain resistance and poor outdoor durability, which makes the exterior walls of buildings, especially buildings and other construction facilities near various roads (highways, railways, urban roads) often All kinds of dust, dirt, oil, etc. (due to exhaust gas), affect the appearance. Although the outdoor durability, water resistance and sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00
Inventor 武利民顾广新游波周树学
Owner FUDAN UNIV
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