FIELD: technological processes.
SUBSTANCE: spherical silica contains powder of precipitated silica having particle size d50 selected in the range of more than 20 mcm to 80 mcm, absorption of dioctyl adipate oil selected in range of 150 to 500 ml/100 g, medium roundness selected within range of 0.70 up to 1.0, and internal friction angle is less than 30°. Process of obtaining silica powder of spherical shape is also included.
EFFECT: invention extends the range of spherical-shape silica with simple production method.
29 cl, 3 tbl, 3 dwg
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Year |
Author |
Number |
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1998 |
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|
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