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Tuesday, 17 September 2019

Ways to use TiO2 more efficiently

Thursday, 13 October 2011 | Posted by: Kirsten Wrede, European Coatings Journal

We are reading a lot about tight supplies and increasing prices of titanium dioxide these days. As TiO2 is the most important white pigment in the coatings industry, known for its ability to improve opacity and whiteness, paint manufacturers need new technologies to use TiO2 more efficiently or replace it with equivalent materials.

I have just leaved through two interesting papers on exactly this subject, which I would like to share with you.

The authors of the first piece stress that if you simply reduce a coating's TiO2 content, you will have a negative impact on opacity. Functional fillers can lead to an increase in opacity, they say. Thus the TiO2 content can be reduced without any loss in quality.
In another article, two new approaches are introduced: an opaque polymer that can partly replace TiO2, and a pre-composite polymer that directly improves the wet and dry hiding power of this pigment. According to the authors, the use of TiO2 can be reduced by 50 %, while opacity is maintained or even increased.

What do you think about these concepts – do they work, and/or are there other ways to use TiO2 more efficiently or even replace it with less expensive materials?

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Kirsten Wrede
European Coatings Journal
Kirsten Wrede
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