SILICONE-BASED DEFOAMER COMPOSITION

Title:

SILICONE-BASED DEFOAMER COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2022/145348

Kind Code:

A1

Abstract:

Provided is a silicone defoamer composition that not only has exceptional defoaming speed, but experiences no loss in defoaming performance even under repeated or prolonged use. The present invention is a silicone defoamer composition that contains a polyoxyalkylene-group-containing polyorganosiloxane polymer crosslinked material, said silicone defoamer composition containing partial structure (I) – R1–(R2 2SiO)d–R1– (where R1 is a C2-20 alkylene group that bonds with a silicon atom on a polysiloxane chain, R2 is a univalent hydrocarbon group, and d is a number within the range of 200–1000) and partial structure (II) –(CeH2e)–O–(EO)x–(PO)y–(BO)z–R3 (where: EO is an ethyleneoxy unit expressed by C2H4O; PO is a propyleneoxy unit expressed by C3H6O; BO is a butyleneoxy unit expressed by C4H8O; the left-end single bond bonds with a silicon atom on the polysiloxane chain; R3 is a hydrogen atom, an alkyl group, an aryl group, or an acyl group; e is a number within the range of 2–10; x+y+z is a number within the range of 40–100; x is a number within the range of 15–50; y is a number within the range of 15–50; and z is a number within the range of 0–50).

Inventors:

SUGIURA TSUNEHITO (JP)
KOJIMA KAZUHIKO (JP)
MORIKAWA IKUTARO (JP)
YOSHIZAWA TAKESHI (JP)

Application Number:

PCT/JP2021/047974

Publication Date:

July 07, 2022

Filing Date:

December 23, 2021

Export Citation:

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Assignee:

DOW TORAY CO LTD (JP)

International Classes:

B01D19/04; C08G77/50; C08K3/36; C08L83/04; C08L83/06; C08L83/12

Foreign References:

JP2014077218A	2014-05-01
JPH07185212A	1995-07-25
JPS6443312A	1989-02-15
JPS63147507A	1988-06-20
JPS63147507A	1988-06-20
JPH07185212A	1995-07-25