Patent ID: 7153923

Claim:
A moisture curable, non-aqueous, alkoxy-crosslinking one-component polymer blend comprising at least one alkoxysilane-terminated polymer (A) having end groups of the formula (1) -A-CH 2 —SiR 1 a (OR 2 ) 3-a (1) and, optionally, one or more tin catalysts in an amount of not more than 100 ppm Sn, based on the weight of the polymer blend, where A is an —O—, —S—, —(R 3 )N—, O—CO—N(R 3 )—, or —N(R 3 )—CO—O—, divalent linker group, R 1 is an optionally halogen-substituted alkyl, cycloalkyl, alkenyl or aryl radical having 10 carbon atoms or less, R 2 is an alkyl radical having 1–6 carbon atoms or an ω-oxyalkyl-alkyl radical having in total 2–10 carbon atoms, R 3 is hydrogen, an optionally halogen-substituted cyclic, linear, or branched C 1 to C 18 alkyl, C 2-18 alkenyl, or C 6 to C 18 aryl radical, and a is an integer from 0 to 2, with the proviso that said polymer blend is not: a foamable mixture comprising an isocyanate-free, alkoxysilane-terminated prepolymer of the formula [2], —X—CO—Y—CH 2 —SiR α w (OR β ) 3-w [2] in which X and Y are an oxygen atom, an NRγ group or a sulfur atom, R α is an alkyl, alkenyl or aryl radical having 1–10 carbon atoms, R β is an alkyl radical having 1–2 carbon atoms or an ω-oxyalkyl-alkyl radical having in total 2–10 carbon atoms, Rγ is a hydrogen atom, an alkyl, cycloalkyl, alkenyl or aryl radical having less than 10 carbon atoms or a CH 2 —SiR α w (OR β ) 3-w group, and w is 0 or 1, where at least one of the two groups, X or Y, is an NH function, and at least one propellant.