Thin dirt-repelling coatings

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/40 (2006.01) B05D 7/16 (2006.01) C08G 18/10 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01) C09D 175/04 (2006.01) B05D 5/00 (2006.01)

Patent

CA 2388581

The invention relates to aqueous compositions which contain at least one dispersed polyurethane prepolymer with at least partially blocked isocyanate groups as well as at least one additional cross-linkable polymer dispersion or polymer solution and optionally surface-active and dispersing agents and flow- control agents. The inventive compositions are useful for producing thin, dirt- repelling functional coatings for stainless steel surfaces. Stainless steel surfaces coated according to the invention are especially useful in households, in sanitary fields, in clinical fields as well as in the food- processing industry and pharmaceutical industry because said stainless steel surfaces are no longer prone to become dirty by virtue of food, cleaning agents or finger marks.

Compositions aqueuses qui contiennent au moins un prépolymère de polyuréthanne en dispersion à groupes isocyanate au moins en partie bloqués, ainsi qu'au moins une autre dispersion ou solution polymère pouvant être réticulée et éventuellement des agents mouillants et dispersants et des agents d'écoulement. Lesdites compositions sont appropriées pour la fabrication de revêtements fonctionnels minces résistant aux salissures pour des surfaces en acier inoxydable. Des surfaces en acier inoxydable dotées dudit revêtement peuvent être utilisées en particulier dans les domaines ménager, sanitaire et hospitalier ainsi que dans l'industrie pharmaceutique et dans les industries alimentaires, étant donné qu'elles ne sont plus susceptibles d'être salies par des produits alimentaires, des produits de nettoyage ou des traces de doigt.

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