Process for producing scratch-resistant coatings, especially...

B - Operations – Transporting – 05 – D

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B05D 7/00 (2006.01) B05D 5/00 (2006.01)

Patent

CA 2283419

A process for producing scratch resistant coatings is characterised in that a coating medium is applied which in the hardened state has a storage module E' in a rubber-elastic range of at least 107,6 Pas and a loss factor tan.delta. at 20 ~C of maximum 0.10. The storage module E' and the loss factor have been measured by thermodynamic-mechanical analysis of homogeneous free films with a 40 µm thick layer, ~10. Also disclosed is the use of this process for producing multilayered coats of enamel and a coating medium suitable for carrying out this process.

Ce procédé de production d'enduits résistants aux égratignures se caractérise en ce que l'on applique un milieu d'enduction qui à l'état durci a un module accumulateur E' d'au moins 10<7,6>Pas, dans une plage élastique comme du caoutchouc, et un facteur de perte tan delta à 20 DEG C d'au maximum 0,10. Le module accumulateur E' et le facteur de perte ont été mesurés par une analyse thermodynamomécanique de films libres homogènes d'une épaisseur de couche de 40 mu m, +/-10. L'invention concerne en outre la mise en ouvre du procédé pour produire des peintures à plusieurs couches, ainsi que le milieu d'enduction utile pour mettre en oeuvre ce procédé.

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