Rapid-cure, one-component mixtures, which contain alkoxysilane-terminated polymers

A polymer blend comprising at least one alkoxysilane-terminated polymer (A) having end groups of the formula (1)

• -A-CH2—SiR1a(OR2)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—, —(R3)N—, O—CO—N(R3)—, —N(R3)—CO—O—, —N(R3)—CO—NH—, —NH—CO—N(R3)—, or —N(R3)—CO—N(R3)— divalent linker group,
• R1 is an optionally halogen-substituted alkyl, cycloalkyl, alkenyl or aryl radical having 10 carbon atoms or less,
• R2 is an alkyl radical having 1-6 carbon atoms or an ω-oxyalkyl-alkyl radical having in total 2-10 carbon atoms,
• R3 is hydrogen, an optionally halogen-substituted cyclic, linear, or branched C1 to C18 alkyl, C2-18 alkenyl, or C6 to C18 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—CH2—SiRa60 w(ORβ)3-w [2]
• in which
• X and Y are an oxygen atom, an NRγ group or a sulfur atom,
• Rα is an alkyl, alkenyl or aryl radical having 1-10 carbon atoms,
• Rβ 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 CH2—SiRαw(ORβ)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.