Patent ID: 11939446
Assignee: NOURYON CHEMICALS INTERNATIONAL B.V.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 2:
3. The process according to claim 1, wherein the colloidal silica that is surface-modified with the hydrophobic organosilane groups has a degree of surface modification (DM) of up to 190%, wherein 190% means an amount of 4.5 μmol hydrophobic organosilane groups per m2 of the colloidal silica, and wherein DM is calculated according to the equation:, DM
  =
  
   
    N
    Sil
   
   ⁢
   
    W
    CS
   
   ×
   
    C
    CS
   
   ×
   
    SA
    CS
   
  
 

in which;
DM is the Degree of Surface Modification in units of μmol m−2 
Nsil is the quantity of organosilane added to colloidal silica in units of μmol
WCS is the weight of colloidal silica before it is surface modified in units of g (grams)
CCS is the percentage by weight of silica in the colloidal silica before it is surface-modified; and
SACS is the surface area of the silica in the colloidal silica before it is surface modified, the surface area being calculated by Sears Titration, in units of m2 g−1.