C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/10 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C09J 175/02 (2006.01) C09J 175/08 (2006.01)
Patent
CA 2473437
The invention relates to a two-constituent composition, wherein the first constituent (A) contains at least one polyurethane prepolymer which has isocyanate end groups and is produced from at least one aromatic polyisocyanate and at least one polyol, and at least one polyaldimine which can be obtained from at least one polyamine having aliphatic primary amino groups and at least one aldehyde which, in position .alpha. in relation to the carbonyl group, does not have any C-H groups. The second constituent (B) contains water which is bound to a carrier material. The inventive composition is characterised in that it exhibits a high early strength, and hardens quickly, thus not forming any bubbles.
L'invention concerne une composition à deux composants, dans laquelle le premier composant (A) contient au moins un prépolymère de polyuréthanne qui comporte des groupes terminaux isocyanate et qui est produit à partir d'au moins un polyisocyanate aromatique et d'au moins un polyol, et au moins une polyaldimine pouvant être obtenue à partir d'au moins une polyamine comportant des groupes amino primaires aliphatiques et au moins un aldéhyde qui, en position .alpha. par rapport au groupe carbonyle, ne présente pas de groupement C-H. Le deuxième composant (B) contient de l'eau liée à un matériau support. Cette composition est caractérisée en ce qu'elle présente une grande résistance initiale et durcit rapidement sans former de bulle.
Burckhardt Urs
Konstanzer Martin
Stadelmann Ursula
Gowling Lafleur Henderson Llp
Sika Technology Ag
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