Improved pressure sensitive labeling adhesive

Details Improved pressure sensitive labeling adhesive Improved pressure sensitive labeling adhesive

C - Chemistry, Metallurgy

09

J

C09J 153/02 (2006.01) C08L 53/02 (2006.01) C09J 153/00 (2006.01) G09F 3/10 (2006.01)

Patent

CA 2247060

A pressure sensitive adhesive which exhibits both improved adhesive characteristics and improved convertibility. This adhesive is obtained by combining a typical styrenic block copolymer, blended with tackifying resins, whether natural or hydrocarbon based, and including, a styrene isoprene di- block copolymer. The effect of this use of styrene isoprene di-block copolymer, besides the expected result of reducing the tendency of conventional plasticizers to migrate from the adhesive and cause staining of the label stock or release liner, also has the unexpected results of substantially improved temperature performance and a very substantial improvement in ability to be die cut.

L'invention porte sur un adhésif autocollant doté de propriétés améliorées d'adhérence et de convertibilité. On produit cet adhésif en associant un copolymère bloc styrénique typique à des résines collantes, naturelles ou à base d'hydrocarbures, et à un copolymère di-blocs styrène-isoprène. L'utilisation de ce copolymère di-blocs, en sus du résultat escompté, à savoir la réduction de la tendance des agents plastifiants classiques à quitter l'adhésif et à maculer le film à étiquettes ou le revêtement protecteur, a des incidences imprévues en ce sens qu'elle permet d'obtenir un adhésif dont le rendement en température est sensiblement accru et qui se prête beaucoup mieux au découpage à l'emporte-pièce.

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