Strongly adherent surface coatings

B - Operations – Transporting – 05 – D

Patent

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Details

B05D 3/14 (2006.01) B05D 3/08 (2006.01) C07F 9/50 (2006.01) C07F 9/53 (2006.01)

Patent

CA 2522898

In a process for the production of a strongly adherent coating on an inorganic or organic substrate, wherein a), a low-temperature plasma treatment, a corona discharge treatment or a flame treatment is carried out on the inorganic or organic substrate, b) one or more photoinitiators or mixtures of photoinitiators with monomers or/and oligomers, containing at least one ethylenically unsaturated group, or solutions, suspensions or emulsions of the afore-mentioned substances, are applied to the inorganic or organic substrate, and optionally, c) using suitable methods those afore-mentioned substances are dried and/or are irradiated with electromagnetic waves, it proves advantageous to use compounds of formula (I), (II), (III) and/or (IV), IN-L-RG (I), IN-L- RG1-L1-H (II), IN-L-RG1-L1-IN1 (III), IN-L-RG1-L1-RG2-L2-IN1 (IV), wherein IN and IN1 are each independently of the others a monacylphosphine, monoacylphosphine oxide or monoacylphosphine sulfide photoinitiator group; L1 L1 and L2 are a single bond or a spacer group; RG is a monovalent radical having at least one ethylenically unsaturated C=C bond; and RG1 and RG2 are each independently of the other a divalent radical having at least one ethylenically unsaturated C=C bond.

La présente invention concerne un procédé de production d'un revêtement à forte adhérence sur un substrat inorganique ou organique, selon lequel : a) on soumet le substrat inorganique ou organique à un traitement au plasma à basse température, à un traitement par effet couronne ou à un flammage; b) on applique sur le substrat inorganique ou organique un ou plusieurs photoinitiateurs ou mélanges de photoinitiateurs et de monomères et/ou oligomères, contenant au moins un groupe éthyléniquement insaturé, ou des solutions, suspensions ou émulsions des substances précitées ; et, facultativement, c) selon des procédés appropriés, on sèche les substances précitées et/ou on les irradie avec des ondes électromagnétiques. Selon l'invention, il est avantageux d'utiliser des composés des formules (I), (II), (III) et/ou (IV), IN-L-RG (I), IN-L-RG¿1?-L¿1?-H (II), IN-L-RG¿1?-L¿1?-IN¿1? (III), IN-L-RG¿1?-L¿1?-RG¿2?-L¿2?-IN¿1? (IV), où IN et IN¿1? sont chacun indépendamment de l'autre un groupe initiateur de monoacylphosphine, d'oxyde de monoacylphosphine ou de sulfure de monoacylphosphine; L¿1? L¿1? et L¿2? sont une liaison simple ou un groupe espaceur; RG est un radical monovalent possédant au moins une liaison C=C éthyléniquement insaturée ; et RG¿1? et RG¿2? sont chacun indépendamment l'un de l'autre un radical divalent possédant au moins une liaison C=C éthyléniquement insaturée.

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