| Patent Number |
Title Of Patent |
Date Issued |
| 6384125 |
Chemically modified silica fillers, process for producing, and silicone compositions containing |
May 7, 2002 |
| This invention is a process for making modified silica filler comprising the steps of:(A) contacting an acidic aqueous suspension of precipitated or colloidal silica, optionally in the presence of a surfactant and/or a water-miscible solvent, with a combination of(a) a functionalizing co |
| 6239243 |
Method for preparing hydrophilic silica gels with high pore volume |
May 29, 2001 |
| A method for the preparation of hydrophilic silica gels with high pore volume. In the preferred method a hydrophilic silica hydrogel treated with an organosilicon compound to effect hydrophobing of the silica hydrogel is heated in the presence of an oxidizing atmosphere to a temperature |
| 6184408 |
Method for preparation of hydrophobic precipitated silica |
February 6, 2001 |
| A method for the preparation of hydrophobic precipitated silica. The method comprises contacting an aqueous suspension of a hydrophilic precipitated silica with (1) a catalytic amount of an acid and (2) an organosilicon compound in the presence of (3) a water-miscible organic solvent in |
| 6107351 |
Neutral-aged hydrophobic silica gels with reduced surface area |
August 22, 2000 |
| The present invention is neutral-aged hydrophobic silica gels having a reduced surface area and a method for their preparation. The method comprises three steps, where in the first step a mixture comprising a silica hydrosol and colloidal silica is contacted with a strong mineral aci |
| 6051672 |
Method for making hydrophobic non-aggregated colloidal silica |
April 18, 2000 |
| A method for making hydrophobic non-aggregated colloidal silica comprising reacting an aqueous suspension of a hydrophilic non-aggregated colloidal silica having an average particle diameter greater than about 4 nm with a silicon compound at a pH less than about pH 4 in the presence of a |
| 6013187 |
Method for removing metal contaminants from solution using mercapto-functional silica xerogels |
January 11, 2000 |
| A method for removing metal contaminates from solution using mercapto-functional silica xerogels. The mercapto-functional silica xerogels are characterized by having a surface area greater than 365 m.sup.2 /g, an average pore diameter of at least 6 nm, and a pore volume of at least 2 |
| 5942590 |
Process for making hydrophobic silica with reduced surface area under neutral conditions |
August 24, 1999 |
| The present invention is hydrophobic silica gels having a reduced surface area and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a mixture comprising a silica hydrosol and colloidal silica is adjusted with a bas |
| 5807501 |
Neutral-aged hydrophobic organosilicate-modified silica gels |
September 15, 1998 |
| The present invention is neutral-aged hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises three steps, where in the first step an organosilicate-modified silica hydrosol is contacted with a strong mineral acid at a pH less than about 1 |
| 5789514 |
Method for preparing hydrophobic silica gels |
August 4, 1998 |
| A method for the preparation of hydrophobic silica gels which are useful as reinforcing fillers in rubber compositions. The method comprises two steps, where in the first step a silica hydrosol is contacted with a sufficient concentration of a strong mineral acid at a pH less than about |
| 5789495 |
Method for making hydrophobic organosilicate-modified silica gels under neutral conditions |
August 4, 1998 |
| The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of an organosilicate-modified silica hydrosol is adjusted with a base to within a range |
| 5750610 |
Hydrophobic organosilicate-modified silica gels |
May 12, 1998 |
| The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises two steps, where in the first step an organosilicate-modified silica hydrosol is heat treated in the presence of a strong mineral acid at a pH less than about |
| 5708069 |
Method for making hydrophobic silica gels under neutral conditions |
January 13, 1998 |
| The present invention is hydrophobic silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of a |
