Silicone antifoam composition

B - Operations – Transporting – 01 – D

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B01D 19/04 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2629475

There is provided antifoam composition comprising an antifoaming-effective amount of at least one antifoam component, where antifoam component comprises product of the reaction of (a) at least one silicone fluid, (b) at least one silicone resin selected from the group consisting of silicone resin (i) having a ratio of M to Q units of from about 0,6/1 to about 0.8/1 and a different silicone resin (ii) having a ratio of M to Q units of from about 0.55/1 to about 0.75/1, optionally, (c) at least one inorganic particulate possessing reactive surface groups; and, optionally, (d) catalyst for the reaction of (a) and/or (b) with (c).

La présente invention concerne une composition antimousse comprenant une quantité antimousse efficace d~au moins un composant antimousse, le composant antimousse comprenant le produit de la réaction (a) d~au moins un fluide de silicone, (b) d~au moins une résine de silicone choisie dans le groupe constitué par une résine de silicone (i) ayant un rapport des motifs M sur Q d~environ 0,6/1 à environ 0,8/1 et une résine de silicone différente (ii) ayant un rapport des motifs M sur Q d~environ 0,55/1 à environ 0,75/1, éventuellement, (c) d~au moins une substance particulaire inorganique possédant des groupes de surface réactifs ; et, éventuellement, (d) d~un catalyseur pour la réaction de (a) et/ou (b) avec (c).

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