| 摘要 |
A storage-stable, moisture-cured, single-component polyurethane system comprising (a) a polyurethane prepolymer having an NCO content of from about 1 to 10 weight percent prepared by the reaction of higher molecular polyols and aromatic polyisocyanates, (b) at least one polyaldimine having the structural formula <IMAGE> <IMAGE> in which R is a multivalent linear or branched or cyclic hydrocarbon radical, which optionally is interrupted by alkylene-, sulfonyl-, thio- and/or oxy groups as bridge members, or is a multivalent polyoxyalkylene radical, (c) optionally an aromatic and/or aliphatic carboxylic acid or arylsulfonic acid, and (d) optionally auxiliaries and/or additives. The polyurethane systems are useful as sealing, casting, patching, cementing and coating compounds.
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