Pressure sensitive adhesive sheet

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 133/08 (2006.01) A61L 15/58 (2006.01) C08J 5/18 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2429388

A pressure sensitive adhesive sheet which has a moderate adhesive strength, does hardly add physical stimuli to the adherend at the time of peeling and also has such a good processing suitability that the support does not generate swelling deformation by transfer of a liquid component from the adhesive layer. The pressure sensitive adhesive sheet has an adhesive layer formed from a resin composition comprising an acrylic acid ester polymer, a carboxylic acid ester having 16 or more carbon atoms which is compatible with the acrylic acid ester polymer and is liquid or paste at ordinary temperature, and a crosslinking component, and a film supporting the adhesive layer, comprising a polyether urethane resin obtained by allowing a polyol component to react with a polyisocyanate component, wherein the polyol component constituting the urethane resin contains at least one kind of polyether polyol having a polyoxyalkylene backbone represented by a specified repeating unit.

Une feuille adhésive autocollante qui a une force d'adhérence modérée, n'ajoute à peu près pas de stimuli physiques à l'adhérent lorsqu'on retire la feuille d'une surface et a également une telle adéquation de traitement que le support ne génère pas de déformation de gonflement par le transfert d'un composant liquide de la couche adhésive. La feuille adhésive autocollante a une couche d'adhésif formée d'une composition de résine comprenant un ester polymère d'acide acrylique, un ester d'acide carboxylique ayant 16 ou plus atomes de carbone qui est compatible avec l'ester polymère d'acide acrylique et qui est sous forme de liquide ou de pâte à la température ambiante, et un composant de réticulation, et un film supportant la couche adhésive, comprenant une résine uréthane polyéther obtenue en permettant un composant polyol à réagir avec un composant polyisocyanate, dans lequel le composant polyol constituant la résine uréthane contient au moins un type de polyéther polyol ayant un squelette de polyoxyalkylène représenté par une unité spécifiée à répétition.

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