C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/42 (2006.01) C04B 28/02 (2006.01) C04B 28/14 (2006.01) C08G 77/08 (2006.01)
Patent
CA 2615010
A method of preparing a hydrophobic mineral and/or filler material, for example a gypsum material, comprises (i) preparing a hydrolyzate containing polysiloxanes by hydrolyzing a hydrolysable silane or hydrolysable silane mixture in the presence of an acid hydrolysis catalyst; and (ii) combining the polysiloxane hydrolyzate with the mineral and/or filler, and optionally water and/or a catalyst for condensation of the hydrolysate.
L'invention porte sur un procédé de préparation d'un minéral et/ou d'une matière de remplissage hydrophobe, par exemple un gypse, qui consiste à: (i) préparer un hydrolysat contenant des polysiloxanes en hydrolysant un silane hydrolysable ou un mélange de silanes hydrolysable en présence d'un catalyseur d'hydrolyse acide; et (ii) combiner l'hydrolysat de polysiloxanes avec le minéral et/ou la matière de remplissage et, facultativement, de l'eau et/ou un catalyseur afin de provoquer la condensation de l'hydrolysat.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Dow Corning Corporation
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