Two-component polyurethane sealants, and a mixing method therefor
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United States of America Patent
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Nov 23, 1993
Grant Date -
N/A
app pub date -
Dec 4, 1991
filing date -
Dec 5, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
2-component polyurethane sealants for the direct glazing of motor vehicles, comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty solvent-containing component, where component (A) contains at least one latent, solvent-activatable curing agent which can be activated by means of solvents, and component (B) contains a polar, aprotic solvent and water reversibly bonded to a carrier substance which liberates the water in a delayed manner after components (A) and (B) have been mixed.
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