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US 12,203,047 B2Granted
Defoaming agent, lubricating oil composition containing defoaming agent, and machine using lubricating oil composition
AssigneeDIC Corporation
InventorsRyuta Fujiwara, Yoshiyuki Yaoita, Nobuyuki Koike
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Abstract
Provided is a defoaming agent showing an excellent defoaming property. Specifically, the defoaming agent includes a polymer containing as a polymerization component a polymerizable monomer (1) having a urethane bond and a fluorine-containing functional group and/or a silicone chain-containing functional group.
Claims18
A defoaming agent comprising a polymer containing as a polymerization component a polymerizable monomer (1) that is one or more selected from the group consisting of a compound represented by general formula (1-1) below and a compound represented by general formula (1-2) below,
- in the general formulae (1-1) and (1-2),
- R1 is a hydrogen atom or a methyl group,
- L1 is a divalent organic group or a single bond,
- L2 is a divalent or trivalent organic group or a single bond,
- L3 is a divalent organic group or a single bond,
- U is a urethane bond,
- R2 is a fluorine-containing functional group or a silicone chain-containing functional group,
- R3 is a divalent fluorine-containing functional group or a divalent silicone chain-containing functional group, and
- x is an integer of 1 or 2.
6 more elements
Dependencies are inferred from the claim text.