Cross-linkable polymer blends containing alkoxysilane-terminated polymers

A crosslinkable polymer blend, comprising at least one polymer A having endgroups of the formula (1)

• -L-CH2—SiR1a(OR2)3-a (1)
• wherein
• L is a divalent linking group selected from —O—CO—NH—, —N(R3)—CO—NH—, —S—CO—NH—,
• R1 is an optionally halogen-substituted alkyl, cycloalkyl, alkenyl or aryl radical having 1–10 carbon atoms,
• R2 is an alkyl radical having 1–6 carbon atoms or an ω-oxyalkylalkyl radical having a total of 2–10 carbon atoms,
• R3 is hydrogen, an optionally halogen-substituted cyclic, linear or branched C1 to C18 alkyl or alkenyl radical or a C6 to C18 aryl radical, and
• a is an integer from 0 to 2,
• with the proviso that the fraction of the endgroups of the general formula (1) where a=2, relative to all the endgroups of the polymers present in the mixture which have alkoxysilane endgroups, is from 5% to 100%.