Silicone resin compositions which can be cured at room temperature

A composition, comprising:

• (a) a binder comprising at least one alkoxy-functional polysiloxane;
• and
• (b) at least one crosslinking catalyst which is a silicon-containing guanidine moiety of formula (IVa), (IVb) or (IVc):
• wherein:
• R3 are divalent radicals which, independently of one another, are identical or different linear or branched hydrocarbon radicals containing 1 to 50 carbon atoms, and which may be interrupted by at least one heteroatom, and/or may be substituted by at least one hydroxyl radical, at least one amino radical, or a mixture thereof;
• R11, R12, R21, R22 and R31 independently of one another, are identical or different and are hydrogen, linear or branched or cyclic hydrocarbons containing 1 to 15 carbon atoms, it being possible for the hydrocarbons also to contain 1 or 2 heteroatoms;
• a silicon compound is bonded to R3 via a Si atom,
• wherein component b) further comprises at least one crosslinking catalyst of the formula (I):
• MaMGbDcDGdTeQf (I),
• wherein:
• a=0 to 10,
• b=0 to 10,
• c=0 to 350,
• d=0 to 50,
• e=0 to 50,
• f=0 to 10,
• where the sum of the indices b and d is greater than or equal to 1 to 20,
• with the proviso that when the index a is 2 and at the same time the sum of the indices b, c, e and f is zero, the index d is other than 1,
• M=[R3SiO1/2]
• MG=[RGR 2SiO1/2],
• D=[R2SiO2/2],
• DG=[RG2SiO2/2],
• T=[RSiO3/2],
• Q=[SiO4/2],
• R are, independently of one another, identical or different and are ORa groups and/or linear or branched, saturated or else mono- or polyunsaturated hydrocarbon radicals, which may be interrupted by heteroatoms and/or may be substituted one or more times by hydroxyl, amino, carboxyl or aryl radicals,
• Ra is identical or different and is hydrogen and/or alkyl groups having 1 to 12 carbon atoms,
• RG is a radical containing guanidine groups and of the formula (IVa), (IVb) or (IVc), the tautomers and/or salts thereof,
• R3 are divalent radicals which, independently of one another, are identical or different, linear or branched hydrocarbon radicals containing 1 to 50 carbon atoms, and may be interrupted by heteroatoms, and
• R11, R12, R21, R22 and R31 are, independently of one another, identical or different and are hydrogen, linear or branched or cyclic hydrocarbons containing 1 to 15 carbon atoms, it being possible for the hydrocarbons also to contain 1 or 2 heteroatoms,
• wherein the alkoxy-functional polysiloxane of component (a) satisfies the general formula (II):
• RaSi(OR′)bO(4-a-b)/2 (II),
• wherein:
• a and b independently of one another are greater than 0 to less than 2,
• R are, independently of one another, identical or different, linear or branched, saturated or else mono- or polyunsaturated or aromatic hydrocarbon radicals, and
• R′ is an alkyl group consisting of 1 to 8 carbon atoms.