Two component polyurethane sealants, a process for preparing them and their use for bonding a windscreen.

摘要

Two-component polyurethane sealants, in particular for the direct glazing of windscreens comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty water-containing component, component (A) containing a blocked curing agent which can be liberated by water, and component (B) containing water reversibly bonded to a carrier substance which liberates water in a delayed manner after components (A) and (B) have been mixed.