Silylated polyurethane-polyurea protective coating compositions

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 175/06 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/42 (2006.01) C08G 18/75 (2006.01) C09J 175/06 (2006.01)

Patent

CA 2631939

A moisture-curable composition includes a silane-terminated polyurethane- polyurea polymer made by reacting a polyol, polyisocyanate, and polyamine together to provide an isocyanate-terminated polyurethane-polyurea polymer with at least two urethane linkages and at least two urea linkages in the polymer chain, and capping at least a portion of the isocyanate-terminated polymer with a silane having at least one alkoxy group to provide the moisture- curable silane-terminated polymer.

L~invention concerne une composition durcissable à l'humidité comprenant un polymère polyurée-polyuréthane à extrémités silane obtenu en faisant réagir un polyol, un polyisocyanate et une polyamine afin de former un polymère polyurée-polyuréthane à extrémités isocyanate comportant au moins deux liaisons uréthane et au moins deux liaisons urée dans la chaîne polymérique, et en coiffant au moins une partie du polymère à extrémités isocyanate avec un silane comportant au moins un groupement alcoxy afin de former le polymère à extrémités silane durcissable à l~humidité.

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