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Straining at a Gnat and Swallowing a Camel: Safety and Performance Issues with Two - Part Urethane Finish Coats

Straining at a Gnat and Swallowing a Camel: Safety and Performance Issues with Two - Part Urethane Finish Coats
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An escalating amount of negative press on the tried-and-true polyurethane finish coats has arisen due to concerns with their free-isocyanate content. This paper explores performance aspects of polyurethanes with respect to their UV resistance properties, and safety issues associated with polyurethanes as a function of their precursor isocyanate molecules. 

Product Number: 41206-272-SG
Author: Mike O’Donoghue, Ron Garrett, V.J. Datta
Publication Date: 2006
Industries: Coatings , Coatings and Linings
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$20.00
$20.00

An escalating amount of negative press on the tried-and-true polyurethane finish coats has arisen due to concerns with their free-isocyanate content. This paper explores performance aspects of polyurethanes with respect to their UV resistance properties, and safety issues associated with polyurethanes as a function of their precursor isocyanate molecules. A brief exploration is undertaken to ascertain whether or not the perceived assault on polyurethanes is justified when certain non-isocyanate replacement technologies deserve more scrutiny. Ironically, could it be that industry might be “straining at a gnat and swallowing a camel” (biblical: highly concerned about an arguably small matter while ignoring or unwittingly ignorant of something far bigger)?

An escalating amount of negative press on the tried-and-true polyurethane finish coats has arisen due to concerns with their free-isocyanate content. This paper explores performance aspects of polyurethanes with respect to their UV resistance properties, and safety issues associated with polyurethanes as a function of their precursor isocyanate molecules. A brief exploration is undertaken to ascertain whether or not the perceived assault on polyurethanes is justified when certain non-isocyanate replacement technologies deserve more scrutiny. Ironically, could it be that industry might be “straining at a gnat and swallowing a camel” (biblical: highly concerned about an arguably small matter while ignoring or unwittingly ignorant of something far bigger)?

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Product Number: 41206-255-SG
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Product Number: 41206-289-SG
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The Florida Department of Transportation (FDOT) spends over $50 million in steel bridge fabrication and shop painting annually.  According to a recent Federal Highway Administration (FHWA) sponsored study by Appleman, approximately 7% of the cost of a steel bridge is budgeted for blast cleaning and primer application in most shops.  FDOT knows that proper surface preparation and primer application are the best ways to assure long-term corrosion protection.  
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