C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) B05D 1/34 (2006.01) C04B 28/02 (2006.01) C04B 41/48 (2006.01) C04B 41/63 (2006.01) C08G 18/08 (2006.01) C09D 175/08 (2006.01)
Patent
CA 2205668
A sealing composition is described which is curable by a coagulation process whereby the cured film has good mechanical and chemical properties as well as good adhesion on cementitious bases without the need of a primer. Such a sealing composition consists of at least two components, one of them being a polyurethane and/or polyurethane urea dispersion wherein no free isocyanate groups but ionic groups are present, particularly carboxylate and/or sulfonate groups, and a second one being a coagulation agent.
Une composition d'imperméabilisation est décrite, composition qui est thermodurcissable par un processus de coagulation qui confère au film thermodurci des propriétés mécaniques et chimiques avantageuses, en plus d'une bonne adhésion sur des subjectiles cimentieux, sans qu'une couche d'apprêt ne soit nécessaire. Ladite composition étanche consiste en au moins deux composants, dont un est une dispersion polyuréthane et/ou polyuréthane urée qui ne comporte aucun groupe d'isocyanates libre, mais qui comporte des groupes ioniques, surtout les groupes carboxylate et/ou sulfonate, et dont le deuxième composant est un agent de coagulation.
Bosch Klemens
Burge Theodor A.
Pfenninger Ueli
Stadelmann-Sidler Ursula
Osler Hoskin & Harcourt Llp
Sika Ag Vorm. Kaspar Winkler & Co.
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