Determination method for covering power of titanium dioxide

A measurement method, titanium dioxide technology, applied in the field of titanium dioxide production, can solve the problems of low accuracy and long time consumption, and achieve the effect of high accuracy of results, simple and easy operation, and fast and effective analysis process

Active Publication Date: 2012-06-20
PANZHIHUA TAIHAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for measuring the hiding power of titanium dioxide, which solves the defects of low accuracy and long time-consuming in the prior art.

Method used

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  • Determination method for covering power of titanium dioxide
  • Determination method for covering power of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1 Weigh 10g of Meitushi paint (packed in a drinking cup) on a coarse balance, then add 1g of a batch of samples produced by our company, and stir evenly with a glass rod for 5 minutes; the standard sample preparation method is the same;

[0060] 2 Place the prepared paint paste on a black and white cardboard whiteboard with a glass rod, place the standard sample on the left, and the sample on the right (the sample and the standard sample are basically parallel, and there is an interval of 3 mm), and then prepare it with a wet film scrape from the whiteboard to the blackboard;

[0061] 3 Place the cardboard horizontally in the room for 0.5h at room temperature;

[0062] 4 First measure the reflectance of the coating film on the white board, measure four points up, down, left, and right, and calculate the average value R W ; Measure the coating film on the blackboard again, measure four points up and down, left and right, and calculate the average value R B The standard s...

Embodiment 2

[0065] Step is the same as embodiment 1, adopts two batches of samples produced by our company (different from the production time of a batch of samples), the selected standard sample is the same as the embodiment standard sample; test contrast ratio, test result is as shown in table 1 .

Embodiment 3

[0067] Step is the same as embodiment 1, adopts three batches of samples produced by our company (different from the production time of one batch and two batches of samples), the selected standard sample is the same as the embodiment standard sample; test contrast ratio, test result is as follows As shown in Table 1; if the contrast ratio of the sample is greater than the contrast ratio of the agreed standard sample, it indicates that the hiding power index of this batch of samples is qualified, otherwise it is unqualified.

[0068] In practical application, the inventor often combines the method of the present invention with a relatively accurate visual method to compare two kinds of titanium dioxide hiding powers. The visual method adopted is specifically: take by weighing 10g Metosil paint (with Drinking cup), then add 1g of a batch of samples produced by our company, stir evenly with a glass rod for 5 minutes, the standard sample preparation method is the same; use a glass ...

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Abstract

The present invention relates to a determination method for covering power of titanium dioxide, and belongs to the field of titanium dioxide production. The present invention provides a determination method for the covering power of the titanium dioxide, wherein the concrete steps comprise that: a varnish and a titanium dioxide specimen are uniformly stirred and mixed to obtain a titanium dioxide paint paste; B the titanium dioxide paint paste is respectively coated on a whiteboard and a blackboard to form coating films, and a natural air drying treatment is performed on the coating films at a room temperature; and C the reflectivity on the whiteboard after film coating and the reflectivity on the blackboard after film coating are respectively determined, and the reflectivity on the blackboard is divided by the reflectivity on the whiteboard to calculate the contrast ratio to characterize the covering power of the titanium dioxide. The method of the present invention is adopted to determine the covering power of the titanium dioxide, such that result has the high precision, the operation is simple and feasible, and the analysis process is rapid and effective.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and in particular relates to a method for measuring the hiding power of titanium dioxide. Background technique [0002] Titanium dioxide has excellent optical properties and pigment properties, so it is widely used in coatings and other industries. The hiding power is a very important technical indicator for the quality of the coating. The hiding power of titanium dioxide is also called opacity, which refers to the ability of titanium dioxide as a coating to completely cover the substrate. [0003] However, many manufacturers still use the traditional "black and white grid method" GB 1709-1979 in the measurement of hiding power, that is, grind the titanium dioxide sample and linseed oil into a slurry, and evenly paint it on the black and white grid glass until the naked eye sees it. Can not see the black and white grid, the minimum amount of sample used to make the black and white grid...

Claims

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Application Information

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IPC IPC(8): G01N21/55
Inventor 杜长山吴桂兰郭靖瑜梁秀梅刘燕珍
Owner PANZHIHUA TAIHAI TECH
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