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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11390825 B1

PDFFull Text
Date of Patent:
Jul. 19, 2022

Filed:

Mar. 29, 2019

Dispersing agent for lubricating oil, method for producing same, and lubricating oil composition

Applicant:

Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;

Inventors:

Hiroaki Koshima, Chiba, JP;

Yoriyuki Takashima, Ichihara, JP;

Moritsugu Kasai, Chiba, JP;

Assignee:

IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

James C Goloboy

Int. Cl.
CPC ...
C10M 133/56 (2006.01); C08F 8/46 (2006.01); C08F 110/08 (2006.01); C10M 169/04 (2006.01); C10N 30/04 (2006.01); C10N 40/25 (2006.01); C10N 30/02 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01);
U.S. Cl.
CPC ...
C10M 133/56 (2013.01); C08F 8/46 (2013.01); C08F 110/08 (2013.01); C10M 169/044 (2013.01); C10M 2203/003 (2013.01); C10M 2203/1006 (2013.01); C10M 2205/12 (2013.01); C10M 2207/284 (2013.01); C10M 2215/28 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01); C10N 2030/04 (2013.01); C10N 2040/25 (2013.01);
Abstract

A dispersant for a lubricating oil, containing at least one compound selected from a specific nitrogen-containing compound which is obtained by using, as raw materials, (A) at least one polyolefin selected from polybutene and polyisobutene, (B) at least one maleic acid compound selected from maleic acid and maleic anhydride, and (C) polyamine; a boride of the specific nitrogen-containing compound; and an acylated product of the specific nitrogen-containing compound. The polyolefin (A) satisfies at least one of the following conditions (α) and (β). (α) a ratio (Sb/Sa) of an integrated value (Sb) of a peak present at 4.40 to 5.00 ppm in aH-NMR spectrum to an integrated value (Sa) of a peak present at 5.01 to 5.60 ppm in the 1H-NMR spectrum is 2 or more. (β) a ratio (Sd/Sc) of an integrated value (Sd) of a peak present at 1.76 to 2.10 ppm in theH-NMR spectrum to an integrated value (Sc) of a peak present at 1.65 to 1.75 ppm in theH-NMR spectrum is 1 or more.

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