Frequently asked questions about ROPAQUE™ Opaque Polymer


How much TiO2 can I replace with ROPAQUE™ Opaque Polymer?

Every paint formulation is different, with varying limitations on the amount of ROPAQUE™ Opaque Polymer that can be added or the amount of TiO2 that can be removed for optimal cost and performance balance. Based on 30 years of experience with ROPAQUE™ Opaque Polymer, our studies demonstrate that the TiO2 savings in satin to semi-gloss acrylics can be up to 20%. In high-quality acrylic flats, it can be up to 35%. There are some cases where the savings may be even more. Your savings will depend on your starting formulation and desired performance properties. Contact us to learn more.

How much cost can I save with ROPAQUE™ Opaque Polymer?

Even small amounts of TiO2 replacement may yield significant cost savings. There is also strong economic incentive to replace as much TiO2 as possible to yield even greater savings. Your specific cost savings will depend upon the current market price of TiO2 and the amount of TiO2 replacement that you can achieve with ROPAQUE™ Opaque Polymer. Dow Coating Materials has developed a reformulation tool that can help you determine the optimum balance of ROPAQUE™ Opaque Polymer and TiO2. The reformulation tool is in a Microsoft Excel format that is easy to download and use within the security and convenience of your own computer.

Where can I save with ROPAQUE™ Opaque Polymer?

The formulation spaces where cost savings can be achieved with ROPAQUE™ Opaque Polymer are expanding, thanks to changing price points for TiO2, advances in ROPAQUE™ Polymer Technology and new reformulation strategies. For example, formulators can use ROPAQUE™ Opaque Polymer to lower the cost of hiding in paints with as little as 100 lbs. of dry TiO2. In wood coatings, we are seeing opportunities for complete TiO2 replacement. And in solventborne-alkyd formulations, we’re seeing completely new opportunities, thanks to the development of ROPAQUE™ DUAL Opaque Polymer. Contact us to learn more.

How far can I push TiO2 replacement before affecting other performance properties?

The upper limit of TiO2 replacement with ROPAQUE™ Opaque Polymer will vary from one formulation to another and depends on your formulation goals. Possible formulation constraints may include gloss and sheen, burnish resistance and scrub resistance. In satin through semi-gloss formulations, we have achieved TiO2 replacement of up to 20% with little to no attrition in these performance properties. In flat sheens, we have achieved replacement rates of up to 35%, again with little to no attrition in these performance properties. Because wet-hide performance is a function of TiO2, higher replacement levels will result in a corresponding decline in wet hide across sheens. Our formulation experts and our reformulation tool can help you find the right balance of TiO2 and ROPAQUE™ Opaque Polymer for optimum cost efficiency and paint performance.
Contact us to learn more.

Why can’t I just use extenders to develop air-void hiding?

You can, but air-void hiding developed with extenders rapidly degrades paint performance. These air voids lead to porosity in a paint film, which weakens the film and allows water to migrate through the film. This can adversely affect the substrate. The air voids developed in ROPAQUE™ Opaque Polymer are different. They are encapsulated with a hard polymer shell and, thus, do not contribute to porosity, subsequently weakening the paint film.

Is ROPAQUE™ Opaque Polymer suitable for exterior paint formulations?

Yes. ROPAQUE™ Opaque Polymer is an excellent light-scattering pigment for exterior-paint formulations, including acrylics, vinyl acetates, styrene/acrylics and alkyd emulsions. In addition to providing more cost-efficient hiding, replacing a portion of TiO2 with ROPAQUE™ Opaque Polymer contributes to important performance improvements in exterior-paint formulations. These may include tint retention and dirt-pickup resistance.

Can ROPAQUE™ Opaque Polymer replace TiO2 in solventborne alkyds?

Yes. ROPAQUE™ DUAL Opaque Polymer brings the benefits of ROPAQUE™ Opaque Polymer Technology to solventborne alkyds in architectural- paint applications. It’s an industry first, and we’re very excited to be able to bring a new offering that works in both waterborne and solventborne alkyds. Like its counterparts for waterborne paints, ROPAQUE™ DUAL Opaque Polymer reduces hiding costs while offering key performance benefits, including improved tint retention and dirt-pickup resistance in exterior formulations, and improved block resistance and washability in interior formulations.