B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
B05D 3/12 (2006.01) B05D 7/16 (2006.01) C08G 18/38 (2006.01) C08G 18/46 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2383502
The invention provides a method for coating bare, untreated metal substrates wherein a coating composition comprising one or more particularly defined additives is applied directly to a bare metal substrate which has not been chemically and/or mechanically altered. The method requires the steps of (i) providing a bare, untreated metal substrate, the substrate being substantially free of mechanical and/or chemical alterations, (ii) applying a two-component urethane coating composition directly to the bare, untreated metal substrate so as to make a coated metal substrate, and (iii) sanding at least a portion of the coated metal substrate within one hour from the time the two-component urethane coating composition was applied to the bare, untreated metal substrate. The resulting coated metal substrate has an initial adhesion loss of less than 20% as measured by a cross hatch adhesion test per ASTM D-335993.
L'invention concerne un procédé d'application d'un revêtement sur des substrats métalliques nus non traités, consistant à appliquer directement une composition renfermant un ou plusieurs additifs spécifiques sur un substrat métallique nu n'ayant subi aucune altération chimique et/ou mécanique. Ce procédé consiste (i) à utiliser un substrat métallique nu non traité, ledit substrat n'ayant subi aucune altération chimique et/ou mécanique, (ii) à appliquer directement une composition de revêtement à base d'uréthane à deux composants sur le substrat métallique nu non traité de façon à obtenir un substrat métallique revêtu, et (iii) à poncer au moins une partie du substrat métallique obtenu dans l'heure qui suit l'application de la composition de revêtement à base d'uréthane à deux composants sur le substrat métallique nu non traité. Le substrat métallique ainsi obtenu présente une perte d'adhérence initiale inférieure à 20 % selon un essai de quadrillage réalisé conformément à la norme ASTM D-3359 93.
Newton David
Plassmann William
Basf Corporation
Marks & Clerk
LandOfFree
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