Las Vegas, NV, February 04, 2011 --(PR.com
)-- Direct-to-metal (DTM) coatings formulations are a popular choice across a variety of markets. A number of variables relevant to each industry dictates which formulation of DTM coatings is best suited for the job. For example, the light industrial and do-it-yourself markets require simple, easy-to-use, one-component DTM formulations.
Dr. Raymond Stewart, senior R&D scientist, Bayer MaterialScience LLC, presented “One Component Waterborne Resins for Direct-to-Metal Applications” 3:30 p.m., February 2, as part of SSPC 2011 featuring GreenCOAT. The conference takes place in Las Vegas, January 31 – February 3, at the Mandalay Bay Resort.
In his presentation, Stewart will focus on oxidatively curing polyurethane dispersions (PUDs), which provide unique opportunities for the formulation of coatings for DTM applications.
Selecting the best technologies to use in coatings for DTM usage is based on the following criteria: ease of application, speed of drying, environmental compatibility, early water resistance, anti-corrosion properties, high abrasion resistance, good optical properties, cost (paint, application and maintenance) and how quickly it achieves strength necessary for assembly and packaging (stacking tests, rub tests). Polyurethane coatings satisfy these criteria, according to Stewart.
The presentation examines tests performed to measure adhesion, humidity resistance and corrosion resistance. Results show that oxidatively curing PUDs perform well against other PUDs, as well as a commercially available latex emulsion touted for its DTM use. Additional salt fog testing on iron phosphate-treated steel and cold-rolled steel show the oxidatively curing PUD provides comparable performance to a solventborne topcoat system.
Stewart’s presentation demonstrates the power and versatility of waterborne PUDs. “As found through the testing, direct-to-metal requirements relating to cure response, adhesion, water resistance and general coating performance can be met with PUDs based on aliphatic diisocyanates and appropriate polyols,” said Stewart.
Bayer MaterialScience LLC is one of the leading producers of polymers and high-performance plastics in North America and is part of the global Bayer MaterialScience business with approximately 14,300 employees at 30 production sites around the world and 2009 sales of 7.5 billion euros. The company manufactures high-tech polymer materials and develops innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction, medical, and sports and leisure industries. Sustainability is central to Bayer MaterialScience LLC’s business and is based around the key areas of innovation, product stewardship, excellence in corporate management, social responsibility and respect for the environment.