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Process for preparing self-cleaning bionic organic paint with lotus leaf function of external wall of building

An organic coating and self-cleaning technology, applied in the direction of coating, etc., can solve the problems of expensive raw materials and limited market, and achieve the effect of simple method

Inactive Publication Date: 2002-06-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

German patent DE19921876A1 prepared a self-cleaning organic coating with lotus leaf function by blending powder materials, silicon emulsion, water repellent, etc., but the market is limited due to the high price of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0023] Add 10μm 50g lithopone or calcium carbonate powder, 7g hydrogen-containing silicone oil, and 150ml water into a three-necked flask equipped with a stirring device and a thermometer, and keep the temperature at 130°C. After reacting for 2.0 hours, the above mixture is suction-filtered with a sand core funnel, and the filter cake is dried at 90-100° C. to obtain a modified powder. According to the general preparation method of exterior wall latex paint, the above-mentioned modified powder is mixed with silicone modified acrylic emulsion in a weight ratio of 50:50, and mixed with appropriate pigments and fillers and appropriate amount of additives as required. The self-cleaning biomimetic exterior wall architectural organic coating with lotus leaf function is obtained. The surface contact angle of the coating film to water is ≥140°C, the artificial accelerated aging resistance time is ≥1000 hours, and the performance of other exterior wall latex paints is passed. Example ...

example 3

[0024] Add 50g of 20μm quartz powder, 7g of chlorotrifluoroethylene-vinyl ether oligomer, and 150ml of xylene into a three-necked flask equipped with a stirring device and a thermometer, and keep the temperature at 130°C. After reacting for 2.5 hours, the above mixture was suction-filtered with a sand core funnel, and the filter cake was dried at 100° C. to obtain a modified powder. According to the general preparation method of exterior wall latex paint, the above-mentioned modified powder is mixed with the commonly used pure acrylic emulsion in a weight ratio of 60:40, and mixed with appropriate pigments and fillers and an appropriate amount of additives as required to obtain Self-cleaning bionic exterior wall architectural organic coating with lotus leaf function. The surface contact angle of the coating film to water is ≥140°C, the artificial accelerated aging resistance time is ≥1500 hours, and the performance of other exterior wall latex paints is passed. Example 4

example 4

[0025]Add 50g of 830-45μm quartz powder, titanium dioxide and talcum powder, 5g of heptadecafluoro-(1,1,2,2-tetrahydro)decyltrimethoxysilane, and 150ml of xylene into a stirring device and In the three-necked flask with a thermometer, the temperature was kept at 70°C. After reacting for 3 hours, the above mixture was suction-filtered with a sand core funnel, and the filter cake was dried at 100° C. to obtain a modified powder. According to the general preparation method of exterior wall latex paint, the above-mentioned modified powder is mixed with organic fluorine-modified acrylic emulsion in a weight ratio of 50:50, and mixed with appropriate pigments and fillers and appropriate amount of additives as required. The self-cleaning biomimetic exterior wall architectural organic coating with lotus leaf function is obtained. The surface contact angle of the coating film to water is ≥145°C, the artificial accelerated aging resistance time is ≥1000 hours, and the performance of ot...

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Abstract

A bionic organic paint with self-cleaning performance of lotus leaf for external wall is prepared through reaction of inorganic pigment with the compound or resin with low surface tension while stirring for modification, filtering, baking, and then according to requirement, proportionally mxing with acrylic emulsion, other pigment and filler, and assistant. Its advantages include excellent self-cleaning performance and anti-ageing nature.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and relates to a self-cleaning bionic exterior wall building organic coating with lotus leaf function 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. According to the estimates of the Ministry of Construction, the current annual construction area in my country is 500 million M 2 Above, the rural area is 700 million M 2 Above, the area to be decorated is at least 6 billion M 2 Above, plus the decoration of various public high-end buildings newly built in the same period. If we take 7 years as a renovation cycle for the exterior walls of ordinary houses in foreign countries and 10 years as a renovation cycle for the exterior walls of high-rise buildings, the demand for e...

Claims

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Application Information

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