C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 33/193 (2006.01) A43B 13/04 (2006.01) A61Q 11/00 (2006.01) C08K 3/36 (2006.01) C08L 7/00 (2006.01) H01M 2/16 (2006.01)
Patent
CA 2457769
The invention relates to a novel method of preparing silicas and to highly-structured silicas having the following characteristics: a specific surface area CTAB (S¿CTAB?) of between 40 and 525 m?2¿/g; a specific surface area BET (S¿BET?) of between 45 and 550 m?2¿/g; an object size distribution width Ld ((d84 - d16)/d50), which is measured by XDC particle size analysis after deagglomeration with ultrasound, of at least 0.91; and a pore-size distribution such that ratio V¿(d5-d50)?/V¿(d5-d100)? is at least 0.66. The invention also relates to the use of said silicas as polymer reinforcing fillers.
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)/V(d5-d100) est d'au moins 0,66. Elle est également relative à l'utilisation de ces silices comme charges renforçantes de polymères.
Hernandez Julien
Valero Remi
Rhodia Chimie
Robic
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