Self-cleaning paint coating and a method and agent for...

B - Operations – Transporting – 32 – B

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B32B 27/14 (2006.01) B05D 5/08 (2006.01) B05D 7/00 (2006.01) B08B 17/06 (2006.01) B32B 33/00 (2006.01) C09D 5/28 (2006.01) B05D 3/02 (2006.01)

Patent

CA 2437436

The invention relates to self-cleaning paint coatings that exhibit the Lotus effect® and to an agent and a method for producing the same. The inventive paint coatings comprise a paint base coat and a top coat, which has structure- forming particles with an average particle diameter of < 100 nm; said top coat is at least partially hydrophobic and has elevations interspaced at a distance of > 50 nm. The agent contains a liquid medium, at least one hydrophobing agent that has been dissolved therein and the aforementioned structure-forming particles held in suspension. The method comprises the following steps: coating of a substrate with a paint coat, application of the liquid to pasty agent that forms the top coat to the partially cured or uncured paint base coat and curing of the top coat and if required, the paint base coat.

Revêtement autonettoyant sous forme de peinture qui possède un effet lotus ®, et procédé et agent permettant de fabriquer ladite peinture. Selon la présente invention, ledit revêtement comporte une couche de peinture de base et une couche supérieure contenant des particules formant une structure qui possèdent un diamètre moyen inférieur à 100 nm. La couche supérieure est au moins partiellement hydrophobe et présente des bosses séparées d'une distance supérieure à 50 nm. L'agent contient un milieu liquide, au moins une substance destinée à rendre le revêtement hydrophobe dissoute dans le milieu liquide et les particules susmentionnées formant une structure en suspension dans ledit milieu liquide. Le procédé selon la présente invention consiste à appliquer une couche de peinture de base sur un substrat, à appliquer l'agent liquide à pâteux formant la couche supérieure sur la couche de peinture de base partiellement durcie ou non durcie et à laisser durcir la couche supérieure et, si nécessaire, la couche de peinture de base.

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