Patent ID: 8748511

Claim:
A curable composition, comprising a. an alkoxysilane- and/or acyloxysilane-terminated polymer containing at least one end group of the general Formula (I) -A n -R—SIXYZ (I), in which A stands for a divalent binding group, R stands for a divalent C 1 -C 12 hydrocarbon group that optionally contains a heteroatom, X, Y, Z each independently of one another stand for a C 1 -C 8 alkyl, C 1 -C 8 alkoxy or C 1 -C 8 acyloxy group, wherein at least one of the groups X, Y, Z is a C 1 -C 8 alkoxy or C 1 -C 8 acyloxy group, and n stands for 0 or 1, and b. hollow microspheres, made of a copolymer obtained by polymerizing methacrylonitrile and at least one monomer M2, selected from acrylic acid, methacrylic acid, acrylic acid alkyl esters and methacrylic acid alkyl esters, wherein the copolymer comprises maximum 5 wt. % of units incorporated from additional monomers, wherein the copolymer is free of chlorine atoms.