Heat-activatable adhesive composition

Details Heat-activatable adhesive composition Heat-activatable adhesive composition

C - Chemistry, Metallurgy

09

J

C09J 133/06 (2006.01) B32B 7/10 (2006.01) B32B 27/36 (2006.01) G02B 5/12 (2006.01)

Patent

CA 2234772

A heat-activatable adhesive comprising an acrylic copolymer, which copolymer comprises a monomer consisting of an acrylate or methacrylate ester of a non- tertiary alkyl alcohol having a Tg of about 0 ~C or lower; a monomer consisting of an acrylate or methacrylate ester of an alcohol having a Tg of at least about 50 ~C; and a functional monomer. Selected embodiments include a retroreflective article comprising a film having a substantially flat surface and a structured surface, the structured surface comprising a plurality of precisely shaped projections, a colored layer disposed on the structured surface and adhered thereto in a plurality of discrete locations, and a heat- activatable adhesive layer disposed on the colored layer.

La présente invention concerne un adhésif thermocollable contenant un copolymère acrylique, ledit copolymère comprenant un monomère consistant en un ester acrylate ou méthacrylate d'un akylalcool non tertiaire ayant un Tg d'environ 0 ·C ou moins, un monomère consistant en un ester acrylate ou méthacrylate d'un alcool ayant un Tg d'au moins environ 50 ·C; et un monomère fonctionnel. Dans certaines formes d'exécution sélectionnées, on trouve un article réfléchissant composé d'un film dont une surface est pratiquement plate et l'autre est structurée, ladite surface structurée étant composée d'une pluralité de saillies de forme précise, d'une couche colorée disposée sur cette surface structurée et collée à elle au niveau de plusieurs emplacements distincts, et d'une couche adhésive thermocollable disposée sur la couche colorée.

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