How to Choose the Right Titanium Dioxide for Paints and Coatings?

aTitanium dioxide (TiO₂) is one of the most important white pigments used in the paint and coatings industry. It directly affects paint whiteness, hiding power, brightness, color stability and overall coating appearance. However, not all titanium dioxide grades perform the same way. Choosing the wrong grade may lead to poor dispersion, insufficient coverage, higher formulation costs or unsatisfactory coating performance.

For paint manufacturers, the right choice depends on the coating application, formulation system, required performance and production budget.

So, how do you choose the right titanium dioxide for paints and coatings? Here are several practical factors worth considering before purchasing.

The first step is to understand the difference between the two main crystal forms of titanium dioxide: rutile and anatase.

Although both are white pigments, their optical properties and application performance are different.

Rutile Titanium Dioxide

Rutile TiO₂ has a higher refractive index than anatase, which means it generally provides stronger light scattering and better hiding power at comparable particle sizes and formulation conditions.

It also offers better stability and weather resistance, making it a common choice for architectural paints, industrial coatings and exterior coating applications.

For manufacturers producing interior and exterior paints, powder coatings or other demanding coating products, rutile titanium dioxide is usually the first type worth evaluating.

SHYJ Chem offers several rutile grades, including R1930 General Use Rutile Titanium Dioxide, Rutile Titanium Dioxide R1931, R218 and R216.

R1930 is a multipurpose rutile grade with dense zirconia and alumina inorganic treatment and special organic surface treatment. According to its product specifications, it has a TiO₂ content of at least 94%, rutile content of at least 98%, and oil absorption of no more than 18 g/100g. It is designed for interior and exterior latex paints, industrial coatings and powder coatings.

For buyers looking for a general-purpose rutile pigment, R1930 is a product worth considering.

Anatase Titanium Dioxide

Anatase TiO₂ is another option for manufacturers who prioritize whiteness, pigment properties and cost considerations in suitable applications.

It can be used in selected paint and coating formulations, as well as plastics, rubber, inks and other industrial products. However, its weather resistance is generally lower than that of rutile, so it is not usually the preferred option for demanding exterior coatings.

SHYJ Chem provides Anatase Titanium Dioxide A101, with a reported TiO₂ content of at least 98.5%, making it an option for buyers evaluating anatase grades for their specific formulations.

Before making a decision, manufacturers should test both the pigment and the finished coating rather than comparing price alone.

Hiding power is one of the most important properties when selecting titanium dioxide for paints.

In simple terms, hiding power determines how effectively a paint covers the original surface. If the pigment has insufficient hiding power, manufacturers may need to increase the amount of TiO₂ in the formulation to achieve the desired coverage.

This can increase raw material costs and affect the overall formulation balance.

Tinting strength is another important factor. It indicates how effectively a white pigment influences the color strength of a mixed pigment system.

For paint manufacturers producing white, light-colored or pastel coatings, both properties deserve attention.

When evaluating a titanium dioxide supplier, ask for:

• TiO₂ content and rutile content.
• Tinting strength test results.
• Brightness and whiteness data.
• Particle size distribution.
• Relevant technical data sheets.

For example, SHYJ Chem's R1930 has a reported tinting strength of at least 100%, while R1931 lists a tint reducing power of at least 1800 under its stated test method.

These figures should be evaluated using the corresponding test methods and reference standards, rather than compared directly without checking how they were measured.

A common problem in paint manufacturing is that titanium dioxide does not disperse evenly in the formulation.

Poor dispersion can cause pigment agglomeration, uneven color, reduced gloss and inconsistent hiding power.

In some cases, manufacturers may need additional grinding or dispersion time, which increases production costs.

This is why dispersibility should be considered when choosing titanium dioxide for paints and coatings.

Several factors influence dispersion performance:

• Particle size and particle size distribution.
• Surface treatment.
• Compatibility with the binder system.
• Wetting and dispersing additives.
• Grinding equipment and processing conditions.
• Surface treatment is particularly important.

Some rutile titanium dioxide grades use inorganic treatments such as alumina, silica or zirconia, together with organic treatments to improve surface compatibility and dispersion in different coating systems.

For example, R1930 uses dense zirconia and alumina coating with special organic treatment. R1931 also uses zirconium- and aluminum-based inorganic treatments combined with an organic surface layer.

These treatments help improve pigment dispersion and coating performance, but actual results still depend on the complete paint formulation.

Oil absorption is another technical specification that paint manufacturers should not overlook.

It indicates how much oil is required to wet a certain amount of pigment under a specified test method.

In practical formulation work, a pigment with lower oil absorption may require less binder or dispersing medium to achieve the desired wetting condition.

This can influence formulation costs, pigment loading and the final coating properties.

For example:

• R1930 has a maximum oil absorption of 18 g/100g.
• R1931 has a maximum oil absorption of 21 g/100g.
• Anatase Titanium Dioxide A101 has a maximum oil absorption of 23 g/100g.

These figures provide a useful starting point for comparing products. However, lower oil absorption does not automatically mean better overall performance.

Manufacturers should also consider hiding power, gloss, dispersion, binder compatibility and finished paint performance.

The best choice is the grade that delivers the required coating quality at an acceptable total formulation cost.

Different coatings have different performance requirements. A pigment that works well in one paint formulation may not be the best option for another.

Here are some common applications to consider.

Interior Architectural Paints

Interior paints generally focus on whiteness, hiding power, smooth appearance and good dispersion.

A general-purpose rutile grade such as R1930 can be considered for this type of application.

Exterior Architectural Paints

Exterior coatings are exposed to sunlight, rain, temperature changes and other environmental conditions.

For these applications, weather resistance, color retention and chalking resistance are particularly important.

Rutile titanium dioxide is generally preferred over anatase for demanding exterior coating systems.

Industrial Coatings

Industrial coatings may require a combination of opacity, gloss, chemical resistance and long-term coating stability.

Manufacturers should select titanium dioxide according to the resin system, processing conditions and final coating requirements.

Powder Coatings

Powder coatings require pigments with good dispersion, consistent color performance and compatibility with the resin and curing system.

Rutile grades such as R1930 and R1931 can be included in the initial evaluation, followed by laboratory testing in the actual powder coating formulation.

When purchasing titanium dioxide in bulk, do not rely only on the product name or quoted price.

Two grades may both be described as rutile titanium dioxide, but their technical specifications and performance in a particular coating system can be different.

Before placing an order, compare the following parameters:

It is also advisable to request a recent Certificate of Analysis (COA), Technical Data Sheet (TDS) and Safety Data Sheet (SDS) before purchasing.

For long-term supply, batch consistency and stable quality are just as important as the initial product price.

Choosing the right pigment is only part of the purchasing process. The supplier also plays an important role in maintaining stable production.

For paint and coatings manufacturers, it is worth checking several points:

• Does the supplier offer different rutile and anatase grades?
• Can they provide complete technical specifications and quality documents?
• Is product quality consistent between batches?
• Can they recommend suitable grades based on the application?
• Are packaging and delivery arrangements suitable for bulk purchasing?
• Can they provide samples for formulation testing?

Shanghai Yuejiang Titanium Chemical Manufacturer Co., Ltd. specializes in titanium dioxide pigments and related chemical products, with an annual production capacity in the tens of thousands of metric tons.

Its product range includes general-purpose rutile titanium dioxide, anatase titanium dioxide and other grades for different industrial applications.

With products such as R1930, R1931, R218, R216 and A101, buyers can evaluate different options according to their coating requirements and production needs.

Choosing the right titanium dioxide for paints and coatings is not simply about finding the highest TiO₂ content or the lowest price.

Manufacturers should consider crystal type, hiding power, tinting strength, dispersibility, oil absorption, surface treatment and the actual application environment.

For most demanding architectural and industrial coating applications, rutile titanium dioxide is a practical starting point. Anatase grades can also be considered for applications where their properties meet the formulation requirements.

If you are looking for a suitable titanium dioxide grade for your paint or coating production, Shanghai Yuejiang Titanium Chemical Manufacturer Co., Ltd. can provide different product options for evaluation.

Contact the SHYJ Chem team with your coating application, formulation requirements and target specifications to discuss suitable titanium dioxide grades and request product samples.