发明授权
US4015031A Process for hydrophobizing silicas and silicates with organosilanes
失效
用有机硅烷疏水化二氧化硅和硅酸盐的方法
- 专利标题： Process for hydrophobizing silicas and silicates with organosilanes
- 专利标题（中）： 用有机硅烷疏水化二氧化硅和硅酸盐的方法
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申请号： US654707申请日： 1976-02-02
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公开(公告)号： US4015031A公开(公告)日： 1977-03-29
- 发明人: Helmut Reinhardt , Karl Trebinger , Gottfried Kallrath
- 申请人： Helmut Reinhardt , Karl Trebinger , Gottfried Kallrath
- 申请人地址： DT Frankfurt
- 专利权人： Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
- 当前专利权人： Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
- 当前专利权人地址： DT Frankfurt
- 优先权： DT2513608 19750327
- 主分类号： C01B33/18
- IPC分类号： C01B33/18 ; C01B33/20 ; C09C1/00 ; C09C1/28 ; C09C1/30 ; B05D1/00 ; B05D7/00
摘要：
Finely divided hydrophobic silica or silicate is produced by treating the dry, moving particles with an organic silane at elevated temperature. The silica or silicate which had been prepared by wet precipitation or pyrogenically and which is in powdered form is heated to a temperature of about 200.degree. to 300.degree. C. with agitation and is brought to a fluidized condition and then is treated dropwise with an organosilane which is stable and boils below 300.degree. C.
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