Silane functional prepolymer and isocyanate functional...

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 183/12 (2006.01) C09J 11/06 (2006.01) C09J 171/02 (2006.01) C09J 175/08 (2006.01)

Patent

CA 2625303

The invention is an adhesive composition comprising a) one or more silane functional prepolymers comprising a polyether or a polyolefin backbone and silane moieties capable of silanol condensation; b) one or more isocyanate functional prepolymers comprising a polyether backbone and isocyanate moieties; c) one or more organotin compounds or titanate or zirconate compounds having one or more ligands comprising a hydrocarbyl phosphate ester or a hydrocarbyl sulfonate ester, or a mixture thereof; d) a tertiary amine or an anhydrous strong organic acid which is miscible with the polymer and enhances the bonding of the adhesive to a coated unprimed substrate. In one embodiment, the invention is a method of bonding two or more substrates together using the adhesive compositions of this invention. The process comprises applying an adhesive as described herein to one or more of the substrates; contacting the one or more substrates with the adhesive disposed between the substrates; and allowing the adhesive to cure.

La présente invention a trait à une composition adhésive comportant: a) un ou des prépolymères à fonctions silane comprenant un squelette polyéther ou un squelette polyoléfine et des groupes fonctionnels silane aptes à la condensation silanol; b) un ou des prépolymères à fonctions isocyanate comprenant un squelette polyéther et des groupes fonctionnels isocyanate; c) un ou des composés d'organotine ou des composés de titanate ou de zirconate ayant un ou des ligands comprenant un ester de phosphate d'hydrocarbyle ou un ester de sulfonate d'hydrocarbyle, ou un mélange de ceux-ci; d) une amine tertiaire ou un acide organique fort anhydre qui est miscible avec le polymère et améliore la liaison de l'adhésif à un substrat non apprêté. Dans un mode de réalisation, l'invention a trait à un procédé pour la liaison mutuelle d'au moins deux substrats comprenant l'application d'un adhésif de l'invention à un ou deux des substrats; la mise en contact d'un ou de plusieurs substrats avec l'adhésif disposé entre les substrats; et la cuisson de l'adhésif.

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