US 12,258,533 B2
Silicone-based defoamer composition
Tsunehito Sugiura, Ichihara (JP); Kazuhiko Kojima, Ichihara (JP); Ikutaro Morikawa, Ichihara (JP); and Takeshi Yoshizawa, Ichihara (JP)
Assigned to DOW TORAY CO., LTD., Tokyo (JP)
Appl. No. 18/269,827
Filed by DOW TORAY CO., LTD., Tokyo (JP)
PCT Filed Dec. 23, 2021, PCT No. PCT/JP2021/047974
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2022/145348, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 2020-219094 (JP), filed on Dec. 28, 2020.
Prior Publication US 2024/0076572 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 155/02 (2006.01); B01D 19/04 (2006.01); C08G 77/46 (2006.01); C10M 125/26 (2006.01); C10M 161/00 (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 155/02 (2013.01) [B01D 19/0409 (2013.01); C08G 77/46 (2013.01); C10M 125/26 (2013.01); C10M 161/00 (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)] 12 Claims
 
1. A silicone anti-foaming agent composition, comprising a polyorganosiloxane polymer crosslinked product having a polyoxyalkylene group, which includes:
moiety structure (I):
—R1—(R22SiO)d—R1—
where R1 represents an alkylene group having 2 to 20 carbon atoms bonded to a silicon atom on the polysiloxane chain, R2 represents a monovalent hydrocarbon group, and d is a number in the range of 200 to 1,000; and
moiety structure (II):
—(CeH2e)—O—(EO)x—(PO)y—(BO)z—R3
where
EO represents an ethyleneoxy unit expressed by C2H4O,
PO represents a propyleneoxy unit expressed by C3H6O,
BO represents a butyleneoxy unit expressed by C4H8O,
a single bond on the left end is bonded to a silicon atom on the polysiloxane chain,
R3 represents a hydrogen atom, an alkyl group, an aryl group or an acyl group,
e is a number ranging from 2 to 10,
(x+y+z) is a number ranging from 40 to 100,
x is a number ranging from 15 to 50,
y is a number ranging from 15 to 50, and
z is a number ranging from 0 to 50.