| 摘要 |
Producing a dispersion of surface modified silica particles with an average particle diameter of 100 nm comprises high pressure grinding a predispersion comprising: 10-50 wt.% of surface modified silicon dioxide particles that are at least partially aggregated, connected with the surface modified components via silicon-oxygen-silicon bonds and exhibit reactive groups on their surface; at least a glycolmonoether compound (I); and at least a carboxylic acid ester compound (II), where the molar ratio of (I) and (II) is 10:90-40:60. Producing a dispersion of surface modified silica particles with an average particle diameter of 100 nm comprises high pressure grinding a predispersion comprising: 10-50 wt.% of surface modified silicon dioxide particles that are at least partially aggregated, connected with the surface modified components via silicon-oxygen-silicon bonds and exhibit reactive groups on their surface; at least a glycolmonoether compound of formula (CH 3(CH 2) m-O-(CH 2) n-[O-(CH 2) o] p-OH) (I); and at least a carboxylic acid ester compound of formula (H 2 x + 1C x-O-CH 2-(CHR)-[O-CHR] y-O-C(=O)-C zH 2 z + 1) (II), where the molar ratio of (I) and (II) is 10:90-40:60. R : H, CH 3, C 2H 5or C 3H 7; m : 0-3; n, o : 2-4; p, y : 0 or 1; and x, z : 1-3. Independent claims are included for: (1) the dispersion, obtained by the above method; (2) a method for the preparation of surface modified silicon dioxide particle granules, in which liquid phase of the dispersion is separated; and (3) the granules of surface modified silicon dioxide particles, obtained by the above method. |
