POLYURETHANSAMMENSÆTNING INDEHOLDENDE ASYMMETRISK DIALDIMIN

Composition (A) comprise at least one aromatic isocyanate group-bearing polyisocyanate and at least one dialdimine compound (I). Composition (A) comprise at least one aromatic isocyanate group-bearing polyisocyanate and at least one dialdimine compound of formula (X-(N=CH-C(Y 1>)(Y 2>)(Y 3>)) 2) (I). X : a diamine with two primary amino group after the removal of these two amino group; either Y 1>, Y 2> : univalent 1-12C-hydrocarbon; or Y 1>Y 2> : 4-20C-bivalent hydrocarbon, whose one part is optionally substituted by 5-8, preferably 6C carbocyclic rings; and Y 3> : a univalent hydrocarbon optionally exhibiting at least a heteroatom, preferably O in the form of ether, carbonyl or ester. Provided that: at least one of both primary amino group of the diamine is an aliphatic amino group and the two primary amino group of the diamine is either in the amount of the hydrogen atoms at the alpha position of the alpha -carbon atoms of the respective amino group, or in the amount of the hydrogen atoms at beta position of the beta -carbon atoms of the respective amino group. Independent claims are included for: (1) a hardening composition, obtained by either reacting (A) with water, preferably in the form of humidity, or mixing two components K1 and K2 optionally with water; (2) a process for adhering a substrate (S1) with a substrate (S2) comprising either applying (A) on the substrate (S1) and contacting substrate (S1) having the applied composition with the substrate (S2) within the open time of (A), or either applying (A) on the substrate (S1) and substrate (S2) and contacting the applied composition within the open time of (A), where the substrate (S2) is from same or different material of substrate (S1); (3) a process for sealing comprising applying (A) between a substrate (S1) and a substrate (S2) such that the composition contacts with the substrates (S1) and (S2); and (4) coating a substrate (S1) comprising applying (A) on a substrate S1 within the open time of (A).