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Dow Introduces EVOQUE™ Pre-Composite Polymer Technology for Paints & Coatings

Published on 2011-03-28. Author : SpecialChem

PHILADELPHIA -- Dow Coating Materials (DCM), a global business unit of The Dow Chemical Company, announces EVOQUE™ Pre-Composite Polymer Technology - a revolutionary development for paints and coatings that promises to change the way formulators think about hiding and the use of titanium dioxide (TiO2).

"Hiding is at the heart of every paint formulation and without TiO2, we would not have paint as we know it today," says Joan Schuller, general manager, North America, Dow Coating Materials. "But TiO2 has been stretched to its limits, both in terms of hiding efficiency and supply."

EVOQUE™ Pre-Composite Polymer Technology improves the particle distribution and light scattering efficiency of TiO2, facilitating improvements in hiding efficiency and allowing for up to 20 percent less TiO2 used in the formulation. Additional benefits include improved barrier properties such as stain and corrosion resistance.

"This is game-changing technology that will make paint formulators rethink hiding," says Schuller.

Depending on their formulation goals, paint manufacturers can use EVOQUE™ Pre-Composite Polymer Technology to reduce TiO2 content or improve hiding while they improve paint performance. The technology may also help formulators reduce the carbon footprint of their end products by reducing the energy footprint that comes from mining, processing and transporting TiO2 to their formulation plants. DCM is conducting a life cycle analysis, which will be verified by a third party, to quantify the full spectrum of sustainability advantages that may result from using EVOQUE™ Pre-Composite Polymer Technology.

"EVOQUE™ Pre-Composite Polymer Technology gives formulators new options and more flexibility when tailoring paint performance to meet the demands of specific markets and applications," points out Ashok Kalyana, North America strategic marketing manager, Dow Coating Materials. "For example, formulators can use EVOQUE™ Pre-Composite Polymer Technology to increase the hiding performance and market value of premium paints. They can also use EVOQUE™ Pre-Composite Polymer Technology to maintain equal hiding and improve paint performance while reducing TiO2 content and raw material cost. It truly provides flexibility to the formulators in designing performance in their paint lines."

EVOQUE™ Pre-Composite Polymer Technology is compatible with ROPAQUE™ Opaque Polymers, which were successfully introduced by DCM 30 years ago. EVOQUE™ Pre-Composite Polymer Technology works in tandem with ROPAQUE™ Opaque Polymers to further increase hiding efficiency and reduce TiO2.

How it works

Titanium dioxide, or TiO2, is the world's most widely used white pigment due to its brightness and high refractive index. In typical paint formulations, however, the efficiency of TiO2 is limited by uneven particle distribution. This effect can be due to poor dispersion and crowding. Adding more TiO2 helps, but only up to a point before formulators reach a level of diminishing hiding returns.

"We decided to take a different approach," relates Dave Fasano, research scientist. "Instead of using more TiO2 to improve hiding, we looked at ways to make it more efficient."

EVOQUE™ Pre-Composite Polymers surround and attach to the surface of TiO2 particles.

As the two materials come together, they form a composite that makes TiO2 better dispersed and more resistant to crowding.

"In effect, we're making every particle of TiO2 work smarter," says Fasano. "That opens up a whole new range of options that formulators do not have with TiO2 alone. Depending on the formulation, EVOQUE™ Pre-Composite Polymer Technology can also impart improved stain resistance and removal, as well as primer-like properties such as tannin, marker stain blocking or corrosion resistance."

EVOQUE™ Pre-Composite Polymer Technology is acrylic based and early testing indicates excellent durability properties for this platform. These properties are further enhanced by removal of some of the TiO2, which participates in some of the photochemical processes that degrade films. Samples of paint formulated using EVOQUE™ Pre-composite Polymer Technology are undergoing exterior exposure testing, and they are performing well. Dow anticipates offering EVOQUE™ Pre-Composite Polymer Technology for exterior waterborne paints by 2012.

Dow expects full commercialization of EVOQUE™ Pre-Composite Polymer Technology during the third quarter of 2011, with rapid expansion of the line in 2012.

About Dow Coating Materials

Dow Coating Materials is the premier supplier of products and technologies to architectural and industrial coatings manufacturers worldwide. Combining the extensive resources of Dow and recently-acquired Rohm and Haas Company, the new business provides formulators a wide range of chemistries and support across many different product lines, including core binder technologies, additives and solvents. Additionally, Dow Coating Materials operates 13 dedicated R&D labs across all major geographies where Dow does business.

About Dow

Dow combines the power of science and technology with the "Human Element" to passionately innovate what is essential to human progress. The Company connects chemistry and innovation with the principles of sustainability to help address many of the world's most challenging problems such as the need for clean water, renewable energy generation and conservation, and increasing agricultural productivity. Dow's diversified industry-leading portfolio of specialty chemical, advanced materials, agrosciences and plastics businesses delivers a broad range of technology-based products and solutions to customers in approximately 160 countries and in high growth sectors such as electronics, water, energy, coatings and agriculture. In 2010, Dow had annual sales of $53.7 billion and employed approximately 50,000 people worldwide. The Company's more than 5,000 products are manufactured at 188 sites in 35 countries across the globe. References to "Dow" or the "Company" mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted.

Source: Dow


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