Viscosity index improver and lubricating oil composition

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12258534
APP PUB NO 20230323241A1
SERIAL NO

18025430

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Abstract

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The present invention aims to provide a viscosity-index improving agent having an excellent friction reduction effect to reduce friction of a lubricating oil composition when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent. The present invention relates to, for example, a viscosity-index improving agent containing: (co)polymer (A) containing, as an essential constituent monomer, a polyolefin-based monomer (a) represented by the following formula (1); an ester oil (B1) having a kinematic viscosity at 100° C. of 1.00 to 2.50 mm2/s; and an ester oil (B2) having a kinematic viscosity at 100° C. of 2.51 to 5.00 mm2/s:

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Patent Owner(s)

Patent OwnerAddress
SANYO CHEMICAL INDUSTRIES LTDKYOTO-SHI KYOTO 605-0995

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimoto, Masahiro Kyoto, JP 99 970
Matsumoto, Satoshi Kyoto, JP 209 1933
Naito, Nobuhiro Kyoto, JP 15 39
Sato, Ryota Kyoto, JP 47 243
Yamashita, Hiroki Kyoto, JP 144 1350
Yoshida, Kenyuu Kyoto, JP 4 12

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