Silicone pressure sensitive adhesive compositions

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 183/04 (2006.01) C08G 77/44 (2006.01) C09J 5/06 (2006.01) C09J 155/00 (2006.01) C09J 183/10 (2006.01)

Patent

CA 2231312

This invention provides pressure sensitive adhesive compositions which are obtainable by a method comprising reacting a mixture comprising at least one polydiorganosiloxane, at least one silicone resin copolymer, at least one solvent or plasticizer selected carboxylic acids having at least six carbon atoms and having a boiling point of at least 200°C. or amines having at least 9 carbon atoms and having a boiling point of at least 200°C. to form a reaction product, and then adding an organic peroxide or azo compound to the resultant reaction product. The silicone pressure sensitive adhesives of this invention are useful in preparing articles such as pressure sensitive tapes, labels, emblems and other decorative or informational signs.

Le présent brevet porte sur des compositions adhésives auto-collantes obtenues par une méthode par laquelle on fait réagir un mélange renfermant au moins un polydiorganosiloxane, au moins un copolymère de résine de silicone, au moins un solvant ou un plastifiant, certains acides carboxyliques comptant au moins six atomes de carbone et dont le point d'ébullition est d'au moins 200 degrés C ou des amines comptant au moins 9 atomes de carbones et dont le point d'ébullition est d'au moins 200 degrés C pour obtenir un produit de réaction, puis on ajoute un peroxyde organique ou un composé azoïque au produit de réaction ainsi obtenu. Les adhésifs auto-collants au silicone obtenus décrits dans le présent brevet servent à la préparation d'articles auto-collants comme des rubans, des étiquettes, des écussons et d'autres éléments décoratifs ou indicateurs.

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