Idemitsu Kosan Company, Limited

Idemitsu Petrochemical Co., Ltd.

Yutaka Takakura

Shuji Machida

Haruo Shikuma

Ayami Hoshino

Hideo Funabashi

Hiroshi Fujita

Junichi Deshimaru

Kenji Nakacho

Ryou Yamada

A lubricating oil composition of the invention includes a lubricant base oil of which kinematic viscosity at 100 degrees C. is 1 to 5 mm/s; and at least one component selected from an olefin copolymer (OCP) and a poly-&#x3b1;-olefin (PAO) of which kinematic viscosity at 100&#xb0; C. is 20 to 2000 mm/s, a kinematic viscosity of the lubricating oil composition at 100 degrees C. being 8 mm/s or less and viscosity index thereof being 155 or more.

Lubricant composition

A lubricating oil composition which comprises a lubricating base oil and a sulfonate, phenate or salicylate of an alkaline earth metal and has a friction coefficient between metals of 0.12 or higher at &minus;20&deg; C. as measured in accordance with a block-on-disk test. The friction coefficient between metals in the use of a metal belt can be kept high within a wide range of temperature from low temperatures to high temperatures. In particular, the lubricating oil exhibits a high performance of &mgr;&equals;0.12 or higher at a low temperature of &minus;20&deg; C. in accordance with a block-on-disk test.

Lubricating oil composition

Process for producing polyolefin

Polyethylenes are disclosed herein which are derived from an ethylene monomer and in which any quaternary carbon atom is not present in a polymeric main chain; and the activation energy (Ea) of melt flow is in the range of 8 to 20 kcal/mol; as well as

Polyethylene, thermoplastic resin composition containing same, and

Ethylene copolymer, thermoplastic resin composition containing same, and

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Sodegaura, Japan

Yutaka Takakura