WATERPROOF GREASE COMPOSITION AND ROLLER BEARING FOR WHEEL SUPPORT

WIPO Patent Application WO/2006/043566

A1

A waterproof grease composition comprising a base oil of 10 to 400 mm²/s kinematic viscosity at 40°C composed of at least one of a mineral oil and a synthetic oil, a thickening agent, a surfactant, a metal soap, a fluorinated water repellent agent, a silicone water repellent agent, a pH adjusting agent and a water resistance imparting agent selected from among waxes, polymers and graphite. This waterproof grease composition even when water is mixed therein can avoid exfoliation, such as white tissue exfoliation. Further, there is provided a roller bearing for wheel support, comprising an inner member with a track surface on its outer circumferential surface; an outer member having on its inner circumferential surface a track surface opposed to the track surface of the inner member, the outer member disposed outside the inner member; and multiple rolling elements disposed rotatably between the two track surfaces, wherein the above waterproof grease composition is enclosed. This roller bearing excels in water resistance.

NAKATANI SHINYA
KURAISHI JUN
MATSUMOTO TOMOAKI

PCT/JP2005/019143

April 27, 2006

October 18, 2005

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NSK LTD (JP)
KYODO YUSHI (JP)
NAKATANI SHINYA
KURAISHI JUN
MATSUMOTO TOMOAKI

C10M171/00; B60B35/18; C10M125/02; C10M129/28; C10M147/00; C10M155/02; C10M159/06; C10M169/06; F16C33/66; C10M115/08; C10N20/00; C10N20/02; C10N30/00; C10N30/06; C10N40/02; C10N50/10

JP2003301190A	2003-10-21
JPS59131698A	1984-07-28
JPS57111395A	1982-07-10
JP2004269789A	2004-09-30
JPS60149696A	1985-08-07
JPH0331394A	1991-02-12
JPS6011591A	1985-01-21
JPH0711276A	1995-01-13
JPH0446997A	1992-02-17
JPH0370797A	1991-03-26
JPS4819604A

Oguri, Shohei (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)

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