Aqueous, two-component binders and their use in coating and...

Details Aqueous, two-component binders and their use in coating and... Aqueous, two-component binders and their use in coating and...

C - Chemistry, Metallurgy

09

D

C09D 175/04 (2006.01) C03C 17/30 (2006.01) C04B 41/48 (2006.01) C08G 18/70 (2006.01) C08G 18/72 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2234337

The present invention relates to a binder composition containing a) 30 to 90 wt.% of an aqueous, hydroxy- and/or amino-functional resin dispersion and b) 10 to 70 wt.% of a curing agent containing alkoxysilyl groups and having a free isocyanate group content of 10 to 23 wt.% and a viscosity of 50 to 10000 mPa~s at 23°C, wherein the molar ratio of the hydroxyl groups of component a) to the isocyanategroups of component b) is 0.5:1 to 2:1. The present invention also relates to the use of these binder compositions in coating and sealing compositions.

La présente invention a trait à une composition liante renfermant a) 30 à 90 % d'une dispersion aqueuse de résine à groupement fonctionnel hydroxy et/ou amino et b) 10 à 70 % d'un agent de polymérisation renfermant des groupements alcoxysilyle et présentant une teneur en groupements isocyanate libres de 10 à 23 % et une viscosité de 50 à 10 000 mPa~s à 23.degrés.C, dans laquelle le ratio molaire des groupement hydroxyles du constituant a) aux groupements isocyanate du constituant b) est compris entre 0,5:1 et 2:1. La présente invention a trait également à l'utilisation de ces compositions liantes dans des compositions de revêtement et de scellement.

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