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HIGHLY DISPERSIBLE SILICA FOR RUBBERS AND THE PROCESS FOR OBTAINING IT

  • US 20120041128A1
  • Filed: 10/11/2009
  • Published: 02/16/2012
  • Est. Priority Date: 10/06/2008
  • Status: Abandoned Application
First Claim
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1. A highly dispersible silica characterized by a DA coefficient which ranges from 0.4 to 0.6, wherein DA is calculated according to Formula I:


  • DA=1−

    (CDBP/DBP0)  



    Formula IwhereinDBP0 is the dibutyl phthalate absorption of a primary uncompressed sample of said silica, as measured according to ASTM D-2441 test; and

    CDBP is the dibutyl phthalate absorption after compression of said silica, as measured according to ASTM D-3493 test, said test being modified to a pressure of 40 MPa.

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