Polyurethane compositions on the basis of...

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 175/06 (2006.01) C08G 18/12 (2006.01) C08G 18/42 (2006.01)

Patent

CA 2395463

The invention relates to compositions containing conversion products of a polyisocyanate with a polyester-polyether copolymer and a method for producing the same. Said compositions are suitable as a humidity-hardening hot-melt-type adhesive. The hot-melt-type adhesive composition can optionally also contain a conversion product of a polyisocyanate with a polyesterpolyol and/or a conversion product of a polyisocyanate with a polyetherpolyol. Such polyurethane hot-melt-type adhesive compositions are provided with good creep property and interfacial bonding values on synthetic materials and very high solidity values.

La présente invention concerne des compositions contenant des produits de réaction d'un polyisocyanate avec un copolymère de polyester-polyéther, ainsi qu'un procédé de production de ces compositions. Ces compositions conviennent en tant que colle fusible durcissant à l'humidité. Ladite composition de colle fusible peut éventuellement également contenir un produit de réaction d'un polyisocyanate avec un polyesterpolyol et/ou un produit de réaction d'un polyisocyanate avec un polyétherpolyol. Les compositions de colle fusible de polyuréthanne selon cette invention présentent de bonnes valeurs de résistance au fluage et d'adhérence à l'interface sur des matières plastiques et de très hautes valeurs de résistance.

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