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Methods for Making Polyurethanes as Thin Films

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Methods for Making Polyurethanes as Thin Films
l Patent No. U.S. 6,506,461 B2
Battelle Memorial Institute, Richland, WA, has received a patent for a method of making a thin film of a polyurethane comprising flash evaporating a solventless monomer mixture that is a combination of a polyol and a polyisocyanate by contact with a heated surface under vacuum to form a vapor; condensing the monomer mixture onto a substrate under vacuum in a vacuum chamber; and curing the monomer mixture as a film of the polyurethane.

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