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Patent Searching and Data


Title:
SULFUR-CONTAINING EXTREME-PRESSURE AGENT AND METAL WORKING OIL
Document Type and Number:
WIPO Patent Application WO/2020/158205
Kind Code:
A1
Abstract:
In a metal working process, the amount of sulfur to be fed can be stabilized in a broad temperature range or when an external force such as a pressure or a shear force is applied and, as a result, a stable iron sulfate film can be formed on the surface of a metal and lubrication performance can be retained for a long period. Furthermore, by using a bulky sulfurized oil or fat having a large molecular weight, it becomes possible to form a rigid lubricant oil film having a large oily film thickness on the surface of a metal and, as a result, it becomes possible to prevent the close contact of metals with each other. The present invention relates to: a sulfur-containing extreme-pressure agent characterized by containing a polysulfide (a) and a sulfurized oil or fat (b) at a ratio of 1:0.1 to 1:10 by mass; and a metal working oil containing the sulfur-containing lubricant oil composition.

Inventors:
OOTSUKI SHUUJIROU (JP)
IBA TAKAFUMI (JP)
SAKATA HIROSHI (JP)
Application Number:
PCT/JP2019/048661
Publication Date:
August 06, 2020
Filing Date:
December 12, 2019
Export Citation:
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Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C10M135/00; C10M135/06; C10M135/22; C10N30/06; C10N40/20
Domestic Patent References:
WO2016158534A12016-10-06
WO2015046008A12015-04-02
Foreign References:
JP2012197329A2012-10-18
JP2015074694A2015-04-20
Attorney, Agent or Firm:
OGAWA Shinji (JP)
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