FIELD: chemistry.
SUBSTANCE: invention relates to silicon dioxides having a modified surface, a method of producing said dioxides and use thereof as filler material in silicone rubber compositions. Pyrogenic silicon dioxide has the following characteristics: BET surface area 25-400 m2/g, average size of primary particles 5-50 nm, pH 3-10, carbon content 0.1-10 wt %, potassium content in terms of potassium oxide 0.000001-40 wt %. According to the invention, silicon dioxide is obtained by modifying the surface of pyrogenic silicon dioxide doped with potassium oxide.
EFFECT: high transparency of the silicone rubber.
4 cl, 4 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| HYDROPHOBIC SILICON DIOXIDE AND ITS APPLICATION IN SILICON RUBBER | 2005 |
|
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| SILICON DIOXIDES WITH MODIFIED SURFACE | 2007 |
|
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| DISPERSION OF HYDROPHOBISATED SILICON DIOXIDE PARTICLES AND GRANULES MADE THEREFROM | 2009 |
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| SILOXANES FUNCTIONALIZED WITH AZOCARBONYL | 2015 |
|
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| RUBBER COMPOSITION, CONTAINING BINDER (CARBON WHITE/ELASTOMER) WITH COMPLEX FUNCTION FOR PNEUMATIC TIRES AND INTERMEDIATES THEREOF, AND METHOD FOR PRODUCTION THE SAME | 2000 |
|
RU2266929C2 |
| ORGANOSILICON COMPOUNDS, SYNTHESIS AND USE THEREOF | 2006 |
|
RU2417998C2 |
| RUBBER MIXTURE | 2012 |
|
RU2612148C2 |
| MODIFIED ELASTOMERIC POLYMERS | 2009 |
|
RU2504555C2 |
