Hollow silica particles and methods for making same

Details Hollow silica particles and methods for making same Hollow silica particles and methods for making same

C - Chemistry, Metallurgy

01

B

C01B 33/18 (2006.01)

Patent

CA 2618552

Methods for making hollow silica particle are disclosed, said particles made from a composition comprising a silicon-containing compound selected from the group consisting of tetraalkoxysilanes, trialkyloxysilanes and derivatives thereof, dialkoxysilanes and derivatives thereof, alkoxysilanes and derivatives thereof, silicone oligomers, oligomeric silsesquioxanes and silicone polymers distributed over a polymer template core that is eliminated from the particle. The particles of the present invention have a substantially uniform particle size and exhibit low permeability to liquids.

L'invention concerne des procédés de fabrication de particules de silice creuses. Ces particules sont élaborées à partir d'une composition renfermant un composé qui contient du silicium sélectionné parmi le groupe englobant des tétraalkoxysilanes, des trialkyloxysilanes et ses dérivés, des dialkoxysilanes et ses dérivés, des alkoxysilanes et ses dérivés, des oligomères de silicone, des silsesquioxanes oligomères et des polymères de silicone distribués sur un noyau polymère de modèle qui est éliminé de la particule. Lesdites particules de l'invention présentent une granulométrie sensiblement uniforme et une faible perméabilité vis-à-vis des liquides.

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