Method of preparing silicas, silicas with specific pore-size...

C - Chemistry – Metallurgy – 01 – B

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C01B 33/12 (2006.01) C08K 3/36 (2006.01) C08L 7/00 (2006.01)

Patent

CA 2729228

L'invention concerne un nouveau procédé de préparation de silices, ainsi que des silices hautement structurées présentant les caractéristiques suivantes : une surface spécifique CTAB (SCTAB) comprise entre 40 et 525 m2/g, une surface spécifique BET (SBET) comprise entre 45 et 550 m2/g, une largeur Ld ((d84 - - d16)/d50) de distribution de taille d'objets mesurée par granulométrie XDC après désagglomération aux ultra-sons d'au moins 0,91 et une répartition poreuse telle que le rapport V(d5-d50)N(d5-d100) est d'au moins 0,66. Elle est également relative à l'utilisation de ces silices comme charges renforçantes de polymères.

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