Hot melt moisture-cure polyurethane adhesive

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/42 (2006.01) C08G 18/10 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08G 81/00 (2006.01) C09J 175/04 (2006.01)

Patent

CA 2077336

Hot melt adhesive compositions combining the characteristics of thermoplastic hot melt adhesives and reactive adhesives can be prepared by blending a polyester polyether thermoplastic elastomer having formula (I) wherein Nu is a predominately cyclic nucleus and R1 is randomly selected from either a C2-6 alkylene or an amorphous polyether subunit comprising a polyoxyalkylene group with a polyisocyanate prepolymer. The resulting composition is flexible and may be used as an adhesive or as a sealant.

n peut préparer des compositions d'adhésif thermofusible combinant les caractéristiques d'adhésifs thermoplastiques thermofusibles et d'adhésifs réactifs en mélangeant un élastomère thermoplastique de type polyester polyéther de formule (I) où Nu est principalement un noyau cyclique et R1 est un radical choisi au hasard entre un groupe alkylène en C2-6 et une sous-unité de polyéther amorphe comportant un groupe polyoxyalkylène avec un prépolymère de polyisocyanate. La composition qui en résulte est souple et peut être utilisée comme adhésif ou comme résine de scellement.

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