Cross-linkable compositions

A crosslinkable composition comprising

• (A) at least one crosslinkable compound selected from the group consisting of compounds (A1) of formula
• A-[(CR12)b—SiRa(OR2)3-a]x (II)
• where
• A is an x-valent polymer radical bonded via nitrogen, phosphorus, oxygen, sulfur, carbon or a carbonyl group,
• R are identical or different and are monovalent, optionally substituted hydrocarbyl radicals,
• R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical which may be attached to the carbon atom via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group,
• R2 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
• x is an integer from 1 to 10,
• a is 0, 1 or 2 and
• b is an integer from 1 to 10
• with the proviso that at least two OR2 groups per molecule are present, and
• compounds (A2) of the formula
• R5cZdSiO(4-c-d)/2 (III)
• where
• R5 are identical or different and each is an optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms,
• Z are identical or different and are a hydroxyl radical or hydrolyzable radical,
• c is 0, 1, 2 or 3 and
• d is 0, 1, 2 or 3
• with the proviso that the sum of c+d is less than or equal to 4 and at least two Z radicals are present per molecule;
• and
• (B) a calcium carbonate-containing filler (B0) surface-treated with carboxylic acids (C) of the formula
• R4—(OCR32—C(═O)OH)y (I)
• where
• R3 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
• R4 is a y-valent, carbon-bonded, optionally substituted hydrocarbyl radical which may be interrupted by oxygen atoms, and
• y is an integer from 1 to 3.