초록 ▼

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 struc

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 [Figure] [Figure] 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.

대표청구항 ▼

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 weight polyols and an aromatic polyisocyanate; (b) at least one polyaldimine havi

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 weight polyols and an aromatic polyisocyanate; (b) at least one polyaldimine having the structural formula [Figure] and mixtures thereof, in which R is selected from the group consisting of a linear or branched, multivalent hydrocarbon radical having from 2 to 16 carbon atoms, linear or branched, multivalent, hydrocarbon radical containing in bonded form oxy groups as bridge members, having from about 4 to 16 carbon atoms, a cycloalkylene radical having from about 6 to 20 carbon atoms, a multivalent polyoxyalkylene radical having the following structural formulas: [Figure] [Figure] and mixtures thereof, in which M is the hydroxyl group-free radical of an initiator molecule, R5 is a hydrogen atom, methyl group, ethyl group and mixtures thereof, and m is a whole number of from 1 to 25, wherein R1 and R2 are the same or different, linear or branched alkyl groups having from 1 to 6 carbon atoms or are a cycloalkyl group, R3 is [Figure] radical, wherein R6 is a linear or branched alkyl group having from 1 to 10 carbon atoms or a cycloalkyl group, and R7 is the same as R6 or is a linear or branched oxyalkyl radical having from 1 to 10 carbon atoms, R4, R3 and R7 are a hydrogen atom or the radical [Figure] wherein R8 is [Figure] and R9 is an aromatic radical having from about 6 to 15 carbon atoms, and n is a whole number of from 2 to 8.