摘要:
Composite inorganic particles and compositions containing silica particles are disclosed. Methods of making silica particles and methods of using composite inorganic particles are also disclosed.
摘要:
The present invention relates to a dispersion of porous surface modified silica particles including fluid and the porous particles, wherein the maximum fractional occupied volume (Φmax) of the particles in the dispersion is at least about 0.55 as determined from the relationship (I) wherein Φ is the fractional occupied volume of the solids in the fluid, Φmax is the asymptotic limit (maximum) of fractional occupied volume as the viscosity approaches infinity, b is the intrinsic viscosity, no is the viscosity of the fluid and n is the viscosity of the dispersion. &eegr;/&eegr;0=[1−(Φ/Φmax)]−[b]Φmax (1)
摘要:
The invention concerns methods for polymerization of olefins comprising contacting one or more monomers selected from ethylene and α-olefins with a supported single site catalyst in the presence of one or more magnesium alkyl compounds wherein said magnesium alkyl is present during the major portion of said polymerization.