Transparent polymer mixtures which contain alkoxysilane-terminated polymers

A polymer blend which cures to a transparent solid polymer, comprising:

• A) alkoxysilane-terminated polymer(s) (A) having a main chain and at least one end group of the formula (1)
• -A-(CH2)m—SiR1a(OR2)3-a (1)
• where
• A each independently is a divalent linker group selected from the group consisting of —O—, —S—, —O—CO—N(R3)—, —N(R3)—CO—O—, —N(R3)—CO—NH—, —NH—CO—N(R3)—, and —N(R3)—CO—N(R3)—,
• R1 is an optionally halogen-substituted alkyl, cycloalkyl, alkenyl or aryl radical having 1 up to 10 carbon atoms,
• R2 is an alkyl radical having 1-6 carbon atoms or an ω-oxaalkyl-alkyl radical having in total 2-10 carbon atoms,
• R3 is hydrogen, an optionally halogen-substituted cyclic, linear or branched C1 to C18 alkyl or C2 to C18 alkenyl radical or a C6 to C18 aryl radical,
• a is an integer from 0 to 2, and
• m is 1,
• B) fumed or precipitated silica having a BET surface area of at least 50 m2/g, and
• C) a catalyst with not more than 0.05% by weight of amino compounds, and no other fillers.