Method for producing one-component sealing and coating compounds with a polyurethane base
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United States of America Patent
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Aug 5, 2003
Grant Date -
Oct 24, 2002
app pub date -
Dec 1, 1999
filing date -
Jun 4, 1997
priority date (Note) -
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Abstract
A method for producing a one-component sealing and coating compound with a polyurethane base. The method provides a simpler means of production as well as guarantees improved storage stability of the compounds produced, and comprises the following steps: agitating a mixture of poly components and one diisocyanate component to obtain an isocyanate prepolymer with a residual content of monomeric diisocyanate of >2 wt per ct; dispersing pigments and inorganic fillers in the mixture and adding a solvent whilst agitating, the residual content of monomeric diisocyanate reacting with the moisture provided by the fillers so as to obtain a H.sub.2 O content of <0.01 wt per ct in the reaction mixture; adding a H.sub.2 O--reactive latent hardener and optionally, at least one catalyst, and airtight packing of the resulting sealing and coating compound.
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