Patent ID: 8349399
Filing Date: 2013-01-08
Classification: A61K,A61Q,C01P,C08K,C09C,C09D

Abstract:
1. A method of producing coated powder particles that are uniformly coated with functional groups, said method consisting of the steps of: a) homogenizing, in an agitator mill, a suspension of glass particles, quartz particles, glass ceramic particles, and/or ceramic particles in a suspending agent together with a functionalized silane and reacting, in the agitator mill, the particles with the functionalized silane during the homogenizing to form the uniformly coated powder particles without agglomerates; and b) when the reacting is finished, removing the suspension from the agitator mill and removing the uniformly coated powder particles from the suspending agent and from any unreacted silane that is present by a separation process, said separation process consisting of drying and optionally extracting with a solvent, so that the coated powder particles are obtained without any and all unbound silane and without said agglomerates; wherein a weight ratio of the suspending agent to the particles is from 0.5:1 to 5:1; wherein said suspending agent comprises water and/or at least one water-soluble oxygen-containing organic compound with 1 to 5 carbon atoms; and wherein said functionalized silane comprises at least one trialkoxysilane selected from the group consisting of 3-triaminopropyltrimethoxysilane, 3-triaminopropyltriethoxysilane, 3-chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane 2-aminoethyl-3-aminopropyltrimethoxysilane, 3-glycidyloxy-propyltrimethoxysilane, 3-glycidyloxypropyltriethoxysilane, hexadecyltrimethoxysilane, iso-butyltrimethoxysilane, isobutyl-triethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-methacryl-oxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, methyltrimethoxy-silane, methyltriethoxysilane, octyltrimethoxy-silane, octyltriethoxysilane, pentyltrimethoxysilane, propyl-trimethoxysilane, propyltriethoxysilane, (2-aminoethyl)-2-aminoethyl-3-aminopropyltrimethoxysilane, vinyltrimethoxysilane, vinyl-triethoxysilane, tetramethoxysilane and tetraethoxysilane.