Method for rapidly testing weather resistance of titanium dioxide and application

A test method and technology for titanium dioxide, which are applied in the preparation of test samples, weather resistance/light resistance/corrosion resistance, measuring devices, etc., can solve the problems affecting the weather resistance test of titanium dioxide, low data reliability, and the inability of titanium dioxide to be uniform and stable. Dispersion and other problems, to achieve the effect of no adsorption and agglomeration phenomenon, obvious change in color image, and simple test method

Active Publication Date: 2019-09-27
上海龙蟒佰利联技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The photocatalytic method of degradation of rhodamine and similar organic dyes can reflect the weather resistance of titanium dioxide, but the surface of titanium dioxide will adsorb organic dyes, and titanium dioxide is also easy to adsorb each other in the organic dye solution, so that titanium dioxide cannot be uniformly and stably dispersed In the solution, it affects the weather resistance test of titanium dioxide, and the data reliability is low

Method used

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  • Method for rapidly testing weather resistance of titanium dioxide and application
  • Method for rapidly testing weather resistance of titanium dioxide and application
  • Method for rapidly testing weather resistance of titanium dioxide and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) The material formula for preparing the test sample is calculated in parts by weight: 100 parts of polyvinyl chloride resin, 5 parts of titanium dioxide, 3 parts of lead salt stabilizer (tribasic lead sulfate), 2 parts of chlorinated polyethylene, plasticizer ( DEHP) 1 part, light calcium carbonate 3 parts, ACR-401 1 part, paraffin 0.1 part; Add the materials in the formula to the high mixer in order, mix at 1000rpm for 15min, take it out and let it stand for 12 hours;

[0030] 2) Add the mixture obtained in step 1) into the hopper of the extruder, set the temperature of the extruder at 180°C, and extrude the sample;

[0031] 3) Cut the sample piece obtained in step 2) into a test piece of 3.5cm×8cm, and test its color value L 0 、a 0 , b 0 ;

[0032] 4) Put the test sample in a water tank (degassed tap water), isolate the air, and put it in a place exposed to direct sunlight (high temperature and clear weather at noon in summer: temperature > 35 ° C, humidity > 70%...

Embodiment 2

[0036] 1) The material formula for preparing the test sample is calculated in parts by weight: 100 parts of polyvinyl chloride resin, 10 parts of titanium dioxide, 10 parts of lead salt stabilizer (tribasic lead maleate), 8 parts of chlorinated polyethylene, plastic 3 parts of DOP, 20 parts of light calcium carbonate, 3 parts of ACR-4013, 1 part of paraffin; add the materials in the formula into the high mixer in order, mix at 1200rpm for 12 minutes, take it out and let it stand for 12 hours.

[0037] 2) Add the mixture obtained in step 1) into the hopper of the extruder, set the temperature of the extruder at 160°C, and extrude the sample;

[0038] 3) Cut the sample piece obtained in step 2) into a test piece of 3.5cm×10cm, and test its color value L 0 、a 0 , b 0 ;

[0039] 4) Seal the test piece with water to isolate the air and put it in the UV aging box (test conditions: 60°C, 0.78W / m 2 ); after 2 hours of exposure, test its color value L 1 、a 1 , b 1 ;

[0040] 5)...

Embodiment 3

[0043] 1) The material formula for preparing the test sample is calculated in parts by weight: 100 parts of polyvinyl chloride resin, 8 parts of titanium dioxide, 8 parts of lead salt stabilizer (dibasic lead phthalate), 5 parts of chlorinated polyethylene, 2 parts of plasticizer (DBP), 10 parts of light calcium carbonate, 2 parts of ACR-4012, 0.5 parts of paraffin; add the materials in the formula to the high mixer in order, mix at 1500rpm for 10 minutes, take it out and let it stand for 12 hours .

[0044] 2) Add the mixture obtained in step 1) into the silo of the extruder, set the temperature of the extruder at 190°C, and extrude the sample;

[0045] 3) Cut the sample piece obtained in step 2) into a test piece of 3.5cm×10cm, and test its color value L 0 、a 0 , b 0 ;

[0046] 4) Put the test piece into the xenon lamp aging box after sealing it with water and isolating the air (test conditions: 45°C, 0.51W / m 2 ); after 2 hours of exposure, test its color value L 1 、a ...

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Abstract

The invention belongs to the technical field of titanium dioxide performance testing, and discloses a method for rapidly testing weather resistance of titanium dioxide and application. The method comprises the following steps of (1) uniformly mixing materials for preparing a test sample wafer, wherein the material formula comprises the following components in parts by weight: 100 parts of polyvinyl chloride resins, 5-10 parts of titanium dioxide, 3-10 parts of lead salt stabilizers, 2-8 parts of chlorinated polyethylene, 1-3 parts of plasticizers, 3-20 parts of calcium carbonate, 1-3 parts of ACR-401 and 0.1-1 part of paraffin; (2) processing a mixture obtained in the step (1) into a sample wafer by adopting an extruder; (3) cutting the mixture obtained in the step (2) into a test sample wafer, and testing color values L0, a0 and b0; (4) sealing the test sample wafer in water, isolating air and carrying out sun exposure for 2-48 hours, and testing color values L1, a1 and b1; and (5) computing a color difference before and after the sun exposure, and judging the weather resistance of the titanium dioxide. According to the method, the weather resistance of the titanium dioxide can be rapidly, efficiently and accurately detected.

Description

technical field [0001] The invention belongs to the technical field of performance testing of titanium dioxide, and in particular relates to a rapid test method and application of the weather resistance of titanium dioxide. Background technique [0002] Titanium dioxide is one of the most important white pigments widely used in coatings, plastics, papermaking, ink and other industries, and weather resistance is an important property that affects the application field and service life of titanium dioxide. At present, the weather resistance testing methods of titanium dioxide mainly include natural exposure test, artificial accelerated aging method and other methods. Natural exposure generally takes several years, and artificial accelerated aging also takes more than several months, which cannot reflect the weather resistance of titanium dioxide in time, and the testing cost is high, which cannot meet the urgent needs of product development and production. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N1/28G01N1/38G01N1/44
CPCG01N17/002G01N17/004G01N1/28G01N1/38G01N1/286G01N1/44G01N2001/2873
Inventor 陈建立张美杰王永珊石强强冯亚阳苏光明宋运萍赵姗姗周文静王欢欢
Owner 上海龙蟒佰利联技术服务有限公司
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