ADDITIVE COMPOSITION FOR LUBRICATING OILS, AND LUBRICATING OIL COMPOSITION

WIPO Patent Application WO/2024/005185

A1

An additive composition for lubricating oils which includes a copolymer (X) that comprises the following constituent units (a) and (b) and satisfies the following requirements (1) to (3). Constituent unit (a): A constituent unit derived from a monomer (A) having a (meth)acryloyl group and a C8-C20 alkyl group Constituent unit (b): A constituent unit derived from a monomer (B) having a (meth)acryloyl group and a polar group Requirement (1): The copolymer (X) has one or more side chains having at least any of the following: a phosphorus- and sulfur-containing group; a phosphorus-containing group and a sulfur-containing group (The phosphorus-containing group is a sulfur-free group and the sulfur-containing group is a phosphorus-free group.); and the sulfur-containing group. Requirement (2): When the copolymer (X) contains phosphorus atoms, the phosphorus atom content (P) in the copolymer (X) is 0.01-2.00 mass% with respect to the whole copolymer (X). Requirement (3): The sulfur atom content (S) in the copolymer (X) is 0.01-2.00 mass% with respect to the whole copolymer (X).

YOSHIDA YUKIO (JP)
KATO SHOTA (JP)

PCT/JP2023/024357

January 04, 2024

June 30, 2023

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IDEMITSU KOSAN CO (JP)

C10M153/02; C10M145/14; C10M151/02; C10N30/06; C10N30/08; C10N40/00; C10N40/02; C10N40/04; C10N40/06; C10N40/08; C10N40/12; C10N40/25; C10N40/30

JP2020026519A	2020-02-20
JP2009149874A	2009-07-09
JP2016169368A	2016-09-23
JP2016065221A	2016-04-28
JP2017106016A	2017-06-15
JP7061242B1	2022-04-27
JP2016074657A	2016-05-12
JPH06172774A	1994-06-21
JPH0641160A	1994-02-15
KR20180112211A	2018-10-12
JPH06505276A	1994-06-16

OHTANI PATENT OFFICE (JP)

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