Method for forming reactive coatings

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 7/16 (2006.01) B05D 3/06 (2006.01) B05D 3/10 (2006.01) B05D 3/14 (2006.01) C09J 5/02 (2006.01) B05D 1/42 (2006.01)

Patent

CA 2510380

The invention relates to a method for forming coatings on an inorganic or organic substrate, in addition to substrates that have been coated according to said method. The invention is characterised in that a) the inorganic or organic substrate is exposed to a low-temperature plasma, a corona discharge, an intense irradiation and/or a flame-treatment, b) 1.) at least one activatable initiator or 2.) at least one activatable initiator and at least one ethylenically unsaturated compound in the form of melts, solutions, suspensions or emulsions is/are applied to the inorganic or organic substrate, whereby at least one group, which interacts with a subsequently applied coating as an adhesion promoter or reacts with groups contained in said coating, is incorporated into the activatable initiator and/or the ethylenically unsaturated compound c) the coated substrate is heated and/or irradiated with electromagnetic waves and an adhesion-promoter layer is formed, d) the substrate that has been pre-treated in this manner is provided with an additional coating containing reactive groups that react with the groups in the adhesion-promoter layer and/or that interact with said layer.

L'invention concerne un procédé pour former des revêtements sur un substrat inorganique ou organique, ainsi que des substrats revêtus au moyen de ce procédé. Le procédé selon l'invention est caractérisé en ce qu'il consiste : a) à soumettre le substrat inorganique ou organique à un plasma basse température, une décharge par effet couronne, un rayonnement dur et/ou à un traitement à la flamme ; à appliquer sur ce substrat inorganique ou organique 1.) au moins un initiateur activable ou 2.) au moins un initiateur activable et au moins un composé éthyléniquement insaturé sous forme de masses fondues, solutions, suspensions ou émulsions, et à incorporer, dans l'initiateur activable et/ou le composé éthyléniquement insaturé, au moins un groupe qui interagit, de manière adhésive, avec un revêtement appliqué ultérieurement ou avec des groupes contenus dans celui-ci, ; c) à chauffer le substrat ainsi revêtu et/ou à l'irradier au moyen d'ondes électromagnétiques, et à former une couche adhésive ; d) à pourvoir le substrat ainsi prétraité d'un revêtement supplémentaire contenant des groupes réactifs qui réagissent avec les groupes de la couche adhésive et/ou interagissent avec cette couche adhésive.

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