An accurate method for determining the relative tinting strength of titanium dioxide

By employing a combined calibration method using a fineness meter and a Zeta potentiometer, the problem of detection deviation caused by differences in titanium dioxide dispersibility has been solved, achieving high accuracy and repeatability in the detection of titanium dioxide tinting strength. This method is suitable for titanium dioxide production and application enterprises.

CN122306507APending Publication Date: 2026-06-30NANJING BERSILION IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING BERSILION IND CO LTD
Filing Date
2026-04-13
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing methods for testing the tinting strength of titanium dioxide, the differences in the dispersibility of titanium dioxide lead to systematic biases in the test results, and there is a lack of fineness threshold correction methods, which affects the accuracy and repeatability of the test.

Method used

By combining a scraper fineness meter and a Zeta potential meter, and through comprehensive rating and correction of fineness difference and Zeta potential difference, the uniformity of titanium dioxide dispersibility is ensured. Combined with multi-point detection and repeated verification, an accurate method for tinting strength testing is established.

Benefits of technology

It achieves high accuracy and repeatability of chromogenic force test results. When the fineness difference is ≤10μm, the relative deviation is ≤2%, and when it is ≥10μm, the relative deviation jumps to ≥3.5%, ensuring the reliability and stability of the test results.

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Abstract

This invention discloses an accurate method for determining the relative tinting strength of titanium dioxide, belonging to the field of pigment performance testing technology. The method includes steps such as base material homogenization pretreatment, test slurry preparation, dispersibility correction, coating preparation and multi-point testing, tinting strength calculation, and accuracy verification. This invention introduces a scraper fineness meter into the titanium dioxide tinting strength testing system, establishing a quantitative relationship between fineness difference and tinting strength measurement deviation. A critical threshold of 10 μm was discovered. When the fineness difference is <10 μm, the relative deviation is <2%; when the fineness difference is ≥10 μm, the relative deviation jumps to ≥3.5%. By actively correcting to below the threshold, the interference of dispersibility differences on the test results is fundamentally eliminated. By simultaneously introducing two dimensions, fineness and Zeta potential, a comprehensive rating and differential correction system is constructed. Fineness and Zeta potential are complementary; the former reflects the current state, while the latter predicts trends. The combination of the two can achieve a comprehensive dispersibility assessment that cannot be achieved by a single parameter, producing a synergistic effect.
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