Adhesives

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 8/00 (2006.01) C09J 133/08 (2006.01)

Patent

CA 2305796

An adhesive composition which is switchable under irradiation to change from a tacky to a less tacky state which includes a switchable polymer. The polymer comprises a backbone polymeric moiety bound to a plurality of curable moieties, each of which comprises a free-radically active group and has an amine functionality. Also, the switchable polymer, processes for producing such polymers and compositions, and switchable adhesive articles comprising the adhesive compositions, such as light-switchable pressure sensitive adhesive dressings, and methods of using such articles.

L'invention concerne une composition adhésive pouvant passer, par exposition à un rayonnement, d'un état collant à un état moins collant et qui comprend un polymère changeant d'état. Le polymère comprend une fraction polymère squelette liée à plusieurs fractions polymérisables, chacune d'elles comprenant un groupe actif à radicaux libres et possédant une fonctionnalité amine. L'invention concerne également ce polymère changeant d'état, des procédés de production de ces polymères et de ces compositions, et des produits adhésifs changeant d'état comportant ces compositions adhésives, tels que des pansements adhésifs autocollants changeant d'état à la lumière, ainsi que des procédés d'utilisation de ces produits.

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