Humidity reactive adhesive compositions with very low temperature dependency of shear modulus

摘要

Moisture-reactive adhesive composition (I) comprises: at least one dialdimine compound (II) and at least one polyurethane polymer (P1), which is liquid at room temperature and comprises isocyanate groups, where after 7 days storage at room temperature and 50% relative humidity, (I) has a ratio of a shear modulus measured at -20[deg] C to 23[deg] C of less than 1.7, where the shear moduli is measured at the stated temperatures according to DIN 54 451. Moisture-reactive adhesive composition (I) comprises: at least one dialdimine compound of formula (Y 1-CH=N-A-N=CH-Y 1) (II) and at least one polyurethane polymer (P1) which is liquid at room temperature and comprises isocyanate groups, where after 7 days storage at room temperature and 50% relative humidity, (I) has a ratio of a shear modulus measured at -20[deg] C to 23[deg] C of less than 1.7, where the shear moduli is measured at the stated temperatures according to DIN 54 451. A : divalent aliphatic, cycloaliphatic or arylaliphatic hydrocarbon radical having 2-15C atoms; and Y 1radical of an aldehyde produced by removing an O=CH group in it. Independent claims are included for: (1) a method of bonding sheets in constructing means of transport, comprising adhering the sheet with (I); (2) a method of reducing temperature dependency of a shear modulus of moisture-reactive polyurethane adhesives with DIN 54 452, comprising adding (II) to (I); and (3) a bonded article obtained by adhesive bonding two substrates S1 and S2 by (I) and moisture-curing the adhesive composition.