Grease composition and rolling device

Patent metadata

Field	Value
Publication number	US-10041540-B2
Application number	US-201314384251-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Mar 22, 2012
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A grease composition which is excellent in seizure resistance can be provided without deteriorating resistance to stirring in the rolling device, and a rolling device in which the grease composition intervenes to a predetermined portion can be also provided by use of a grease composition comprising a base oil and a thickener, the thickener being a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, an alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, the amount of cyclohexylamine in the amine mixture being 80% by mole or more and less than 91% by mole, and a worked penetration being 300 to 330.

First claim

The invention claimed is:

1. A grease composition comprising a base oil and a thickener,
wherein said thickener is a diurea compound obtained by allowing an amine mixture consisting of para dodecylaniline and cyclohexylamine to react with diphenylmethane-4′4 diisocyanate in a ratio of 2 moles of the amine to 1 mole of diphenylmethane-4′4 diisocyanate,
an amount of cyclohexylamine in said amine mixture of 80% by mole or more and less than 91% by mole and an amount of para dodecylanin is more than 9% by mole to 20% by mole thereby totaling 100% by mole,
wherein said base oil is alkyl diphenyl ether oil,
wherein an amount of said thickener in the total amount of said base oil and said thickener is 9 to 25% by mass, and
a worked penetration of the grease composition in accordance with JIS K2220-7 is 300 to 330.

2. A rolling device comprising:
a first race member having a first raceway surface,
a second race member having a second raceway surface, and
a plurality of rolling elements rotatably arranged between said first raceway surface and said second raceway surface,
wherein said first race member and said second race member can move relative to each other, and
said rolling device comprises the grease composition of claim 1 intervening to rolling contact parts and/or sliding contact parts between said plurality of rolling elements and said first raceway surface and rolling contact parts and/or sliding contact parts between said plurality of rolling elements and said second raceway surface.

3. The grease composition of claim 1 , wherein the worked penetration is 305 to 313.

Assignees

• Jtekt Corp
• Nippon Grease Co Ltd

Inventors

• Yoshizaki Koji
• Suzuki Kensuke
• Iwamatsu Hiroki
• Mitsuoka Masashi

Classifications

• F16C29/0695

  with balls · CPC title

• C10N2030/08

  Resistance to extreme temperature · CPC title

• C10M2215/064

  Di- and triaryl amines · CPC title

• C10N2050/10

  semi-solid; greasy · CPC title

• C10M2219/066

  Thiocarbamic type compounds · CPC title