Method for producing coatings, adhesive coatings and seals...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 4/06 (2006.01) C08F 290/12 (2006.01) C09D 133/06 (2006.01) C09J 4/06 (2006.01) C09J 133/06 (2006.01)

Patent

CA 2402920

The invention relates to a method for producing coatings, adhesive coatings and/or seals from coating materials, adhesives and/or sealants that can be cured using actinic radiation, on or in primed and unprimed substrates. According to said method, the coating materials, adhesives and/or sealants are applied to and/or induced in the substrates and the resultant layers are subsequently cured using actinic radiation. Said method uses coating materials, adhesives and sealants which are devoid of photoinitiators and which contain or consist of the following as components that can be activated by actinic radiation: A) at least one (meth)acrylate copolymer which contains as the statistical mean per molecule at least one group (a) comprising at least one bond that can be activated by actinic radiation, whereby group (a) is linked to the basic structure of the (meth)acrylate copolymer (A) by reactions similar to those of polymers, or alternatively B) at least one compound which contains as the statistical mean per molecule at least one group (a) comprising at least one bond that can be activated by actinic radiation and C) at least one (meth)acrylate copolymer which is devoid of groups of type (a). Said coating materials, adhesives and sealants have a concentration of groups that can be activated by actinic radiation of between 70 and 400 mequ./100g solids.

L'invention concerne un procédé pour fabriquer des revêtements, des couches adhésives et/ou des joints constitués de substances d'enduction, d'adhésifs et/ou de masses d'étanchéité durcissables par rayonnement actinique. Selon l'invention, lesdits revêtements, couches adhésives et/ou joints sont enduits sur et dans des substrats apprêtés et non apprêtés par l'application des substances d'enduction, des adhésifs et/ou des masses d'étanchéité sur et/ou dans lesdits substrats, les couches obtenues durcissant sous l'effet d'un rayonnement actinique. Selon ledit procédé, on utilise des substances d'enduction, des adhésifs et des masses d'étanchéité, qui ne sont pas photoinitiatrices et qui contiennent comme composants activables par rayonnement actinique: A) au moins un copolymère (méth)acrylate présentant par molécule en moyenne statistique au moins un groupe (a) doté d'au moins une liaison activable par rayonnement actinique, ce groupe (a) étant lié à la structure de base du copolymère (méth)acrylate par réactions analogues à celles des polymères, ou alternativement, B) au moins une liaison présentant par molécule en moyenne statistique au moins un groupe (a) doté d'au moins une liaison activable par rayonnement actinique, et C) au moins un copolymère (méth)acrylate exempt de tels groupes (a), ou en sont constitués et qui ont une teneur en groupes activables par rayonnement actinique de 70 à 400 mEq/100g de solides.

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