Title:
IRON OXIDE POWDER FOR BRAKE FRICTION MATERIAL
Document Type and Number:
WIPO Patent Application WO/2018/110563
Kind Code:
A1
Abstract:
Provided is an iron oxide powder for a brake friction material which can be suitably used in a brake friction material that is less likely to cause problems regarding brake squealing and that provides superior braking performance. The iron oxide powder for a brake friction material according to a first embodiment of the present invention is characterized by having a sulfur content of 150 ppm or less as measured by combustion ion chromatography, and a saturation magnetization of 20 emu/g or less. The iron oxide powder for a brake friction material according to a second embodiment of the present invention is characterized by having an average particle size of 1.0 μm or more, a chlorine content of 150 ppm or less as measured by combustion ion chromatography, and a saturation magnetization of 20 emu/g or less.
Inventors:
AGA KOJI (JP)
KOJIMA TAKASHI (JP)
KOJIMA TAKASHI (JP)
Application Number:
PCT/JP2017/044611
Publication Date:
June 21, 2018
Filing Date:
December 12, 2017
Export Citation:
Assignee:
POWDERTECH CO LTD (JP)
International Classes:
C09K3/14; C01G49/06; F16D69/02
Domestic Patent References:
| WO2017170532A1 | 2017-10-05 |
Foreign References:
| JP2007197533A | 2007-08-09 | |||
| JP2008291108A | 2008-12-04 | |||
| JP2015010015A | 2015-01-19 | |||
| JPS5760599B2 | 1982-12-20 | |||
| JP2016240077A | 2016-12-12 | |||
| JP2017061855A | 2017-03-30 | |||
| JP2017150981A | 2017-08-31 |
Other References:
See also references of EP 3553148A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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