| abstract |
The invention relates to polymer mixtures (P) which contain A) alkoxysilane-terminated polymers (A) with at least one terminal group of general formula (I), -A-(CH2)m-SiR1a(OR2)3-a, wherein A represents a divalent bond selected from -O-, -S-, -(R3)N-, -O-CO-N(R3)-, -N(R3)-CO-O-, -N(R3)-CO-NH-, -NH-CO-N(R3)-, -N(R3)-CO-N(R3)-, R1 represents an optionally halogen-substituted alkyl, cycloalkyl, alkenyl or aryl group with 1-10 carbon atoms, R2 represents an alkyl group with 1-6 carbon atoms or an ω-oxaalkyl-alkyl group with a total of 2-10 carbon atoms, R3 represents hydrogen, an optionally halogen-substituted cyclic, linear or branched C1 to C18 alkyl or alkenyl group or a C6 to C18 aryl group, a is an integer from 0 to 2 and m is an integer from 1 to 6, B) fumed or precipitated silica having a BET surface of at least 50 m2/g and C) a catalyst with not more than 0.05% by weight of amino compounds and no additional fillers. |