Kao Corporation

Koji Taira

Toshiya Hagihara

Hiroyasu Togashi

Shoji Nakagawa

Yuichiro Kobayashi

Yuzo Yamamoto

Shigeo Fujii

Yoshiaki Oshima

Manabu Shibata

Akimitsu Sakai

Koichi Naito

A polishing composition comprising a chelating compound or a salt thereof; a partially esterified product and/or partially etherified product of a polyhydric alcohol compound; and water; a polishing composition comprising water, an abrasive, an intermediate alumina, and a chelating compound or a salt thereof, wherein the content of the intermediate alumina is from 1 to 50 parts by weight, based on 100 parts by weight of the abrasive; and a polishing composition comprising water, an abrasive, an intermediate alumina, a chelating compound or a salt thereof, and a partially esterified product and/or partially etherified product of a polyhydric alcohol compound, wherein the content of the intermediate alumina is from 1 to 50 parts by weight, based on 100 parts by weight of the abrasive. By using the polishing composition, the polishing rate can be increased, and the surface roughness can be lowered, without causing defects such as scratches and pits on the surface of an object to be polished.

Abrasive fluid compositions

The present invention relates to an abrasive composition for substrates of magnetic recording media, containing at least an abrasive, an abrasive auxiliary and water. The abrasive auxiliary comprises an aliphatic organic sulfate, an oxyalkylene alkyl ether sulfate or an amphoteric surface active agent, and the abrasive composition has a pH of 1 to 13.

Abrasive composition for the base of magnetic recording medium and process for producing the base by using the same

A lubricating oil composition including a phosphorus compound having two or more hydroxyl groups and a P&mdash;N bond in a molecule selected from the group consisting of compounds represented by the general formula (3), (4) or (5):

Phosphorus-comprising lubricating oil composition

Synthetic lubricating oil

Growing community of inventors

Wakayama, Japan

Koji Taira