Paint & Coatings Industry - March 2008 - (Page 34)

Reaching Strict VOC Requirements with Outstanding Durability for Industrial Maintenance and Marine Coatings he he world is sh ri nki ng! I 1903, ld shrinking! In 1903 h i ki ! 1903, Orville and Wilbur Wright flew the first self-propelled aircraft. That same year, H. Nelson Jackson and Sewall Crocker were the first to drive across the United States via automobile, which took them 57 days! During this time frame most citizens did not travel outside of their county, much less to other states and countries. However, a short 44 years later, Orville and Nelson both lived to hear about Chuck Yeager flying at the speed of sound. Now, we are able to cross oceans, deserts, forests and reach any destination on earth within 24 hours or so. This poses the question: Who are our neighbors? How can manufacturers provide workable solutions according to regional needs? What might be the impact regarding such issues as environmental sustainability? Responsible companies ask themselves this question daily, thinking globally about the economic and environmental impact they have on countries beyond their continent. The focus on preserving the quality of life – the “GREEN REVOLUTION”1 – has forced companies to develop marketing strategies focused on decreasing VOCs and toxicity in coating systems,2 and, in addition, meet customer needs. “Reaching strict VOC limitations with outstanding durability for industrial maintenance and marine coatings” are some of the largest challenges faced today by coating formulators.3 Due to increasing maintenance costs, customers in these market segments are looking for longer-lasting, more durable coatings. Some of the most important criteria remain corrosion resistance, UV resistance and lower VOCs. The new polysiloxane hybrid technologies are meeting these challenges. The focus of this paper is on the advancements of “Addition Curing” technologies pertaining to the reduction of VOCs, and improving exterior durability, T particularly as it relates to gloss, color and corrosion ill l l color and cor olor corrosion particularly it relates resistance with minimal impact on cost. Background Some of the first coatings or varnishes were derived from naturally occurring resins such as rosin (sap from pine trees) and oils (coconut, sunflower, etc.), which required a large amount of solvent for application.3 There was less of a concern regarding the VOC of these older technologies and more of a concern for cost and performance. The modification of these technologies and the development of synthetic products have created several new classes of resins with several different types of functionality. Alkyd, epoxy, polyester and acrylic resins are a few of the basic types of synthetic organic resins, and these could be subcategorized by type of functionality such as Table 1 | VOC emission according to EPA Method 24. Technology Commercial Polysiloxane I Commercial Polysiloxane II Commercial Polysiloxane III Commercial Polysiloxane IV Commercial Polysiloxane V Commercial Acrylic Urethane I Commercial Acrylic Urethane II Commercial Acrylic Urethane III Commercial Acrylic Urethane IV Commercial Acrylic Urethane V Commercial Acrylic Urethane VII Commercial Epoxy Commercial Polyester Urethane I Silicone Epoxy I/Acrylic Silicone Epoxy II/Acrylic Silicone Amine/Epoxy As Recommended Supplied Dilution 120 160 240 216 172 435 450 287 246 340 420 311 433 160 145 50 200 275 218 336 282 370 336 160 145 50 By Dieter K. Heldman, Kristi K. Larzelere and James D. Greene | Wacker Chemical Corporation, Adrian, MI 34 MARCH 2008 | W W W . P C I M A G . C O M http://WWW.PCIMAG.COM

Table of Contents Feed for the Digital Edition of Paint & Coatings Industry - March 2008

Viewpoint Industry News Calendar of Events Company News Mergers and Acquisitions Names in the News Marketplace Quarterly Stock Watch Reaching Strict VOC Requirements With Outstanding Durability for Industrial Maintenance and Marine Coatings A Unique Fungicide for Wood-Filled Plastic deSigns of the Times: Slacking Off! From Rocks to Nanos Shear-Free Dispersion Process Fluorinated Oxetane Oligomers as Versatile Intermediates for Polymer Modification The Effects of TPO Composition on Adhesion and Proposed Chemical Mechanism Supplier Showcase Color Management Materials Watch Products Classifieds Advertiser Index

Paint & Coatings Industry - March 2008

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