US Patent 6921781 Process for covering silicas with wax
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Patent abstract
The present invention provides a process, which includes:coating at least a portion of a surface of at least one silica particle with at least one wax, wherein the coating is carried out in at least one gas at a temperature above the melting point of the wax and below the decomposition temperature of the wax, to obtain at least one wax-coated silica particle. Other embodiments of the present invention provides processes for impregnating the silica particle with wax and uses of the wax-coated or wax-impregnated particles.
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Patent Inventor Names
Hans-Dieter Puetz0
Juergen Schubert0
Klaus-Dieter Hellwig0
Michael Pickel0
Date of Patent
July 26, 2005
0Patent Application Number
099344710
Date Filed
August 23, 2001
0Patent Primary Examiner
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US Patent 6921781 Process for covering silicas with wax
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