Fusible adhesives which can be cross-linked by radiation

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 109/00 (2006.01) C09J 4/06 (2006.01) C09J 121/00 (2006.01) C09J 157/00 (2006.01)

Patent

CA 2493312

According to the invention, in order to prepare an adhesive having both a high initial adhesive capacity and high heat resistance, a fusible adhesive which can be cross-linked by radiation and has a low tendency to creep is provided, said adhesive containing: between 0 and 40 wt. % of at least one natural or synthetic elastomer which cannot be cross-linked by radiation, as constituent (A); between 15 and 40 wt. % of at least one compound containing at least two olefinic double bonds, as constituent (B); and between 20 and 85 wt. % of a tackifying resin, as constituent (C). The inventive fusible adhesive is especially suitable for using on high-speed labelling machines, does not pull any threads, and is characterised not only by high heat resistance but also by a good adhesive capacity in relation to plastics and metals.

La présente invention concerne la préparation d'un adhésif qui a à la fois un pouvoir adhésif initial et une résistance à la température élevés. A cet effet, l'invention a pour objet un adhésif fusible réticulable par rayonnement qui à une tendance au fluage faible et comprend : 0 à 40 % en poids d'au moins un élastomère naturel ou synthétique non réticulable par rayonnement qui joue le rôle de composante (A) ; 15 à 40 % en poids d'au moins un composé qui comprend au moins deux doubles liaisons oléfiniques et joue le rôle de composante (B) ; et 20 à 85 % en poids d'une résine à pouvoir adhésif qui joue le rôle de composante (C). L'adhésif fusible de l'invention convient particulièrement à l'utilisation dans des machines d'étiquetage à cadence élevée, ne provoque pas la formation de fils, et se caractérise, en plus d'une résistance élevée à la chaleur, par un bon pouvoir adhésif vis-à-vis des plastiques et des métaux.

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