Partially hydrophobic precipitated silicas
Номер патента: CA2201186A1
Опубликовано: 29-09-1997
Автор(ы): Anja Ramb, Astrid Muller, Heinz-Gunter Lux, Karl Meier, Rolf Oelmuller
Принадлежит: Degussa GmbH
Опубликовано: 29-09-1997
Автор(ы): Anja Ramb, Astrid Muller, Heinz-Gunter Lux, Karl Meier, Rolf Oelmuller
Принадлежит: Degussa GmbH
Реферат: Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 µm and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.
PARTIALLY HYDROPHOBIC SEDIMENTARY SILICIC ACID, METHOD OF ITS PRODUCTION AND USE (Versions)
Номер патента: RU2140871C1. Автор: Карл МАЙЕР,Хайнц-Гюнтер Люкс,Астрид Мюллер,Рольф Оэлмюллер,Аня Рамб. Владелец: Дегусса Акциенгезельшафт. Дата публикации: 1999-11-10.