Title:
WATERPROOF GREASE AND HERMETICALLY FILLED WITH THE GREASE, ROLLING BEARING AND HUB BEARING
Document Type and Number:
WIPO Patent Application WO/2007/037308
Kind Code:
A1
Abstract:
A waterproof grease that even under harsh lubrication conditions such as those
causing water mixing in grease at the time of bearing operation, improves the
resistance to surface starting peeling of bearing of, for example, carbon steel
for mechanical structure; and making use of the grease and exhibiting prolonged
life, a rolling bearing and hub bearing. There is provided a waterproof grease
comprising a nonaqueous base oil, a thickening agent and, as an additive, a water
dispersant, wherein the saturated water content dispersible in the waterproof
grease is in the range of 30 to 60 wt.%, and wherein the water dispersant capable
of dispersing water in the waterproof grease is a surfactant, and wherein the
nonaqueous base oil is a mineral oil and the thickening agent is a urea compound.
Further, there are provided, hermetically filled with the grease, a rolling
bearing and hub bearing.
Inventors:
SATO YOUJI
EGAMI MASAKI
EGAMI MASAKI
Application Number:
PCT/JP2006/319266
Publication Date:
April 05, 2007
Filing Date:
September 28, 2006
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
SATO YOUJI
EGAMI MASAKI
SATO YOUJI
EGAMI MASAKI
International Classes:
C10M169/00; F16C19/18; F16C33/62; F16C33/66; C10M101/02; C10M105/04; C10M107/02; C10M115/08; C10M129/76; C10M133/06; C10M137/10; C10M145/26; C10M159/24; C10N10/04; C10N30/00; C10N30/06; C10N40/02; C10N50/10
Domestic Patent References:
| WO2006043566A1 | 2006-04-27 |
Foreign References:
| JPH0987652A | 1997-03-31 | |||
| JP2003013083A | 2003-01-15 | |||
| JP2004269789A | 2004-09-30 | |||
| JPH0331394A | 1991-02-12 | |||
| JP2004051912A | 2004-02-19 | |||
| JPH05171172A | 1993-07-09 | |||
| JP2005195165A | 2005-07-21 |
Other References:
See also references of EP 1988147A4
Attorney, Agent or Firm:
WAKI, Misao (Toin-cho Inabe-gun, Mie 33, JP)
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