US 12,134,745 B2
Oil compound for silicone-based defoaming agents, method for producing same, and defoaming agent containing oil compound for silicone-based defoaming agents
Kazuhiko Kojima, Ichihara (JP); Ikutaro Morikawa, Ichihara (JP); Tsunehito Sugiura, Ichihara (JP); and Takeshi Yoshizawa, Ichihara (JP)
Assigned to DOW TORAY CO., LTD., Tokyo (JP)
Appl. No. 18/269,824
Filed by DOW TORAY CO., LTD., Tokyo (JP)
PCT Filed Dec. 23, 2021, PCT No. PCT/JP2021/047962
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2022/145345, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 2020-219095 (JP), filed on Dec. 28, 2020.
Prior Publication US 2024/0093119 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 161/00 (2006.01); B01D 19/04 (2006.01); C10M 125/26 (2006.01); C10M 155/02 (2006.01); C10M 173/02 (2006.01); C10N 30/02 (2006.01); C10N 30/18 (2006.01); C10N 40/20 (2006.01); C10N 50/00 (2006.01)
CPC C10M 161/00 (2013.01) [B01D 19/0409 (2013.01); C10M 125/26 (2013.01); C10M 155/02 (2013.01); C10M 173/02 (2013.01); C10M 2201/105 (2013.01); C10M 2229/041 (2013.01); C10M 2229/047 (2013.01); C10N 2030/02 (2013.01); C10N 2030/18 (2013.01); C10N 2040/20 (2013.01); C10N 2050/011 (2020.05)] 13 Claims
 
1. A silicone based anti-foaming agent oil composition, comprising:
(A) an essentially hydrophobic organopolysiloxane having a viscosity of 2,500 to 50,000 mPa's at 25° C.: 20 to 80 parts by mass;
(B) a hydrophobic organopolysiloxane or a cyclic organopolysiloxane containing silanol groups at least at both terminals: 20 to 80 parts by mass;
(C) a silane or silane condensation product: 1 to 10 parts by mass; and
(D) a fine powder silica having a specific surface area of 50 m2/g or more: 2 to 10 parts by mass;
wherein the total amount of (A) and (B) is 100 parts by mass.