Patent ID: 8039539

Claim:
A process for producing an artificial stone composite, comprising mixing an inorganic component comprising 10-40% by weight of particles having a size of <0.1 mm, 10-40% by weight of particles having a size of 0.1-0.6 mm, 1-80% by weight of particles having a size of 0.61-1.2 mm and 10-50% by weight of particles having a size of 1.21-15 mm, wherein the inorganic powder comprises at least 90% of the composite, with at least one organic polymer binder and simultaneously or subsequently mixing with a mixture comprising (A) at least one silane adhesion promoter of the formula (1) H 2 C═C(R 1 )[C(O)O] w (O) x —(R 2 ) y —Si(R 3 ) z —(OR 4 ) 3-z (1), in which R 1 is a hydrogen atom or a linear or branched hydrocarbon radical having 1-10 carbon atoms, R 2 is a divalent linear, cyclic or branched hydrocarbon radical having 1-40 carbon atoms optionally containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, and phosphorus, R 3 and R 4 are linear, cyclic or branched hydrocarbon radicals having 1-10 carbon atoms, w is 0 or 1, x is 0 or 1, y is 0 or 1 and z is 0, 1 or 2, with the proviso that w and x must not both simultaneously be 1, and one or more organosilicon compounds (B), (C), and (D): (B) siloxanes comprising from 0.0 to 80.0 mol % of units of the formula (2) [R 5 3 SiO 1/2 ] (2), from 0 to 5.0 mol % of units of the formula (3) [R 5 2 SiO 2/2 ] (3), from 0 to 99.5 mol % of units of the formula (4) [R 5 SiO 3/2 ] (4) and from 0 to 90.0 mol % of units of the formula (5) [SiO 4/2 ] (5), in which R 5 is a hydrogen atom, hydroxyl group, SiC-bonded, optionally substituted C 1 - to C 18 -hydrocarbon radical, optionally interrupted by divalent radicals —O—, —COO—, —OOC—, —CONR 6 —, —NR 6 CO— and —CO— bonded on both sides to carbon atoms, or a C 1 - to C 18 -hydrocarbonoxy radical, R 6 is a hydrogen atom or C 1 to C 18 -hydrocarbon radical, with the proviso that the organopolysiloxanes (B) have at least 2 units of the formulae (2) to (5) and the sum of the units of the formulae (2) to (5) is 100 mol %, (C) organosilicon compounds comprising from 0.0 to 100.0 mol % of units of the formula (6) [R 7 3 SiO 1/2 ] (6), from 0.0 to 98.0 mol % of units of the formula (7) [R 7 2 SiO 2/2 ] (7), from 0.0 to 98.0 mol % of units of the formula (8) [R 7 SiO 3/2 ] (8) and from 0.0 to 98.0 mol % of units of the formula (9) [SiO 4/2 ] (9), in which R 7 is a hydroxyl group, divalent SiC-bonded, optionally substituted C 1 - to C 18 -hydrocarbon radical, which may be interrupted by divalent radicals from the group consisting of —O—, —COO—, —OOC—, —CONR 6 —, —NR 6 CO— and —CO— bonded on both sides to carbon atoms, or a C 1 - to C 18 -hydrocarbon-oxy radical, with the proviso that, in the organosilicon compounds (C), at least 90 mol % of the radicals R 7 are C 1 - to C 18 -hydrocarbonoxy radicals and the sum of the units of the formulae (1) to (4) is 100 mol %, and (D) organosilanes of the formula (10) Si(R 8 ) 4 (10), in which R 8 are C 1 to C 18 -hydrocarbonoxy radicals.