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Patents

Abrasion resistant

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Abrasion resistant
coatings from dupont
Patent No. U.S. 6,592,977 B2
E. I. du Pont de Nemours and Company has received a patent for a primer composition capable of forming an adherent coating to a substrate and exhibiting abrasion resistance. It is comprised of fluoropolymer, polymer binder and inorganic filler film hardener, the fluoropolymer to polymer binder weight ratio being 0.5 to 2.0:1 and the filler film hardener to fluoropolymer weight ratio being at least 1.4:1, at least 30% weight of the filler film hardener comprising large ceramic particles having an average particle size of at least 14 micrometers and a Knoop hardness of at least 1200. The fluoropolymer is polytetrafluoroethylene or a copolymer of tetrafluoroethylene and at least one fluorinated copolymerizable monomer.

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