Block copolymer blend adhesives with multiple tackifiers

Details Block copolymer blend adhesives with multiple tackifiers Block copolymer blend adhesives with multiple tackifiers

C - Chemistry, Metallurgy

09

J

C09J 109/06 (2006.01) C09J 11/00 (2006.01) C09J 109/00 (2006.01)

Patent

CA 2671033

Pressure sensitive adhesives comprising a linear block copolymer having a rubbery block and at least one glassy block; a multi-arm block copolymer having at least three arms, each having both a rubbery block and a glassy block; a first high glass transition temperature tackifier compatible with the rubbery blocks; a second high glass transition temperature tackifier having compatible with the glassy blocks; and at least one of a low Tg tackifier, a plasticizer, and combinations thereof, are disclosed. Tapes that include such adhesive, methods of making such tapes, and bonded composites using such adhesives and tapes are also disclosed.

Adhésifs sensibles à la pression comprenant un copolymère bloc linéaire à bloc caoutchouteux et au moins un bloc vitreux; un copolymère bloc multibras ayant au moins trois bras, chacun doté d'un bloc caoutchouteux et d'un bloc vitreux; un premier agent collant à haute température de transition vitreuse compatible avec des blocs caoutchouteux; un second agent collant à haute température de transition vitreuse compatible les trois blocs vitreux; et au moins l'un ou l'autre des éléments suivants: agent collant à faible Tg, agent plastifiant et combinaisons correspondantes. On décrit des rubans comportant ce type d'adhésif, des procédés d'élaboration de ces rubans et des composites liés faisant appel à ce type d'adhésif et ce type de ruban.

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