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.:
Date of Patent:
Dec. 17, 2024
Filed:
Aug. 20, 2021
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Nobuhiro Naito, Kyoto, JP;
Hiroki Yamashita, Kyoto, JP;
Kenyuu Yoshida, Kyoto, JP;
Hiroki Hagihara, Kyoto, JP;
SANYO CHEMICAL INDUSTRIES, LTD., Kyoto, JP;
Abstract
The present invention aims to provide a viscosity index improver composition capable of providing a lubricant composition that has an excellent viscosity index improving effect, excellent antifoaming properties, and excellent persistence of the antifoaming properties. The present invention relates to a viscosity index improver composition, containing: a (co)polymer (A) containing a monomer (a) represented by the following formula (1) as an essential monomer; a C18-C40 chain aliphatic alcohol (B); and a base oil, [Chem. 1] wherein Ris a hydrogen atom or a methyl group; —X— is a group represented by —O— or —NH—; Ris a C2-C4 alkylene group; Rand Rare each independently a C8-C24 linear or branched alkyl group; and p is an integer of 0 to 20, with each Rbeing optionally the same as or different from each other when p is 2 or greater.