C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/7218, 117/47
C08L 83/04 (2006.01) C08K 9/06 (2006.01) C09C 1/30 (2006.01) C09C 3/12 (2006.01)
Patent
CA 2003838
The invention relates to a process for rendering particulate solids containing Si-OH groups hydrophobic which comprises reacting a water repellent containing an organosilicon compound with particulate solids containing Si-OH groups with simultaneous mechanical loading of the reaction mixture, in which from 5 to 50 percent by weight of the particulate solids containing Si-OH groups are used, based on the total weight of the reaction mixture containing particulate solids and water repellent, and the use of the resultant hydrophobic particulate solids in compositions containing diorganopolysiloxanes, which can be cured to form elastomers.
L'invention concerne un procédé pour rendre hydrophobes des solides particulaires contenant des groupes Si-OH; le procédé comprend la réaction d'un agent hydrofuge contenant un composé organosilicié avec des solides particulaires contenant des groupes Si-OH avec charge mécanique simultanée du mélange réactionnel, dans lequel de 5 à 50 pour cent en poids des solides particulaires contenant des groupes Si-OH sont utilisés, par rapport au poids total du mélange réactionnel contenant les solides particulaires et l'agent hydrofuge, et l'utilisation des solides particulaires hydrophobes ainsi obtenus dans des compositions contenant des diorganopolysiloxanes, qui peuvent être durcis pour former des élastomères.
Maier Anton
Muller Horst
Pradl Ferdinand
Schuster Johann
Vorbuchner Helmut
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Wacker-Chemie G.m.b.h.
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