Two-component polyurethane composition with high early strength

Details Two-component polyurethane composition with high early strength Two-component polyurethane composition with high early strength

C - Chemistry, Metallurgy

08

G

C08G 18/12 (2006.01) C08G 18/48 (2006.01)

Patent

CA 2551404

The invention relates to a two-component compound in which the first component A comprises at lest one type of polyurethane prepolymer A1 which contains isocyanate end-groups and is produced from at least one type of polyisocyanate and the second component B which comprises water and at least one type of polyaldimine B1 and is obtainable from at least one type of polyamine PA containing aliphatic primary aminogroups and at least one type of aldehyde ALD of formula (I) or formula (II). The inventive compound is outstanding by the fact of the long processing time and high early strength thereof, a fast setting time, nevertheless without bubble formation, in particular said compound is odourless or exhibits a very low odour before, during and after thermosetting.

L'invention concerne une composition à deux composants, dans laquelle le premier composant A comprend au moins un prépolymère de polyuréthanne A1 à groupes terminaux isocyanate, produit à partir d'au moins un polyisocyanate et d'au moins un polyol, et dans laquelle le second composant B comprend de l'eau et au moins une polyaldimine B1 qui est obtenue à partir d'au moins une polyamine PA à groupes amino primaires aliphatiques, et d'au moins un aldéhyde ALD selon la formule (I) ou la formule (II). La composition est remarquable en ce qu'elle présente un temps de transformation élevé et une résistance initiale élevée, en ce qu'elle durcit rapidement et, toutefois, sans formation de bulles et, en particulier, en ce qu'elle ne présente avant, pendant et après durcissement, aucune odeur ou seulement une très faible odeur.

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