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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 direction of coating, etc., to achieve the effect of simple method

Inactive Publication Date: 2003-11-12
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] Coating basic formula 1

[0027] Raw material Amount (wt%)

[0028] water 25

[0029] Silicone acrylic emulsion 20

[0030] Hydrophobic Additives 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] Prepared by the method of exterior wall latex paint according to the above formula, the super self-cleaning function exterior wall organic architectural paint can be obtained. The surface contact angle of the coating film to water is ≥122℃, the artificial accelerated aging resistance time is ≥700 hours, the decomposition rate of oil pollution is ≥90%, and the performance ...

example 2

[0043] Coating Basic Recipe 2

[0044] Raw material Amount (wt%)

[0045] water 28

[0046] Fluorocarbon Emulsion 26

[0047] Hydrophobic Additives 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 the exterior wall organic architectural paint with self-cleaning function can be obtained. The surface contact angle of the coating film to water is greater than or equal to 130°C, the artificial accelerated aging resistance time is greater than or equal to 1000 hours, the decomposition rate of...

example 3

[0061] Coating Basic Recipe 3

[0062] Raw material Amount (wt%)

[0063] water 28

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

[0065] alkenoate emulsion)

[0066] Hydrophobic Additive 3

[0067] Titanium dioxide 15

[0068] Silica fume powder (45μm) 8

[0069] Modified Anatase Nano 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 the exterior wall organic architectural paint 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 decomp...

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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 exterior wall buildings and a preparation method thereof. Background of the Invention [0002] With the continuous and steady 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 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 building facilities near various roads (highways, railways, urban roads) often All kinds of dust, dirt, oil, etc. (due to exhaust gas), affect the appearance. Silicon-acrylic exterior latex coatings and fluorocarbon coatings hav...

Claims

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Application Information

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Patent Type & Authority Applications(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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