C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/12 (2006.01) C08J 3/21 (2006.01) C08J 3/26 (2006.01) C08L 83/04 (2006.01) C08L 83/05 (2006.01) C08L 83/07 (2006.01)
Patent
CA 2236056
A highly productive process is disclosed for preparing cured silicone powder having a uniform particle size, in which a platinum-alkenylsiloxane complex catalyst is added to a water-based dispersion of a silicone composition.The silicone composition is (i) an organopolysiloxane having at least two silicon-bonded alkenyl groups in each molecule, and (ii) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule. The catalyst is added and dispersed in the form of liquid particles with an average particle size in volumetric particle size distribution in water of no more than one micrometer.
Divulgation d'un processus très productif pour préparer de la poudre de silicone durcie dont les particules ont des dimensions uniformes, dans lequel un catalyseur à base d'un complexe de platine-alcénylsiloxane est ajouté à une dispersion à base d'eau d'une composition de silicone. La composition de silicone est (i) un organopolysiloxane ayant au moins deux groupements alcényles liés au silicium dans chaque molécule, et (ii) un organopolysiloxane ayant au moins deux atomes d'hydrogène liés au silicium dans chaque molécule. Le catalyseur est ajouté et dispersé sous la forme de particules liquides, la taille moyenne de ces dernières dans leur distribution volumétrique dans l'eau ne dépassant pas un micromètre.
Kobayashi Kazuo
Morita Yoshitsugu
Tachibana Ryuji
Dow Corning Toray Silicone Company Ltd.
Gowling Lafleur Henderson Llp
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