Brick, tile, floorboard, ceiling panel, and roofing material, and method for manufacturing same
US-2016368824-A1 · Dec 22, 2016 · US
Iron oxide powder for brake friction material
US11359689B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11359689-B2 |
| Application number | US-201716466427-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2017 |
| Priority date | Dec 12, 2016 |
| Publication date | Jun 14, 2022 |
| Grant date | Jun 14, 2022 |
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- Title
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- Abstract
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1. An iron oxide powder for a brake friction material, having: an average particle diameter of 30 μm or more, a chlorine content of 150 ppm or less in a combustion ion chromatography, a saturation magnetization of 20 emu/g or less, and a blackness (L* value) of 23 or more and 33 or less. 2. The iron oxide powder for a brake friction material according to claim 1 , having: a shape factor SF-1 of 100 or more and 150 or less. 3. The iron oxide powder for a brake friction material according to claim 1 , having: a pore volume of 10 mm 3 /g or more and 180 mm 3 /g or less. 4. The iron oxide powder for a brake friction material according to claim 1 , having: a BET specific surface area of 0.05 m 2 /g or more and 1.20 m 2 /g or less. 5. The iron oxide powder for a brake friction material according to claim 1 , having: a peak pore diameter of 0.2 μm or more and 1.2 μm or less.
Assignees
Inventors
Classifications
Surface area · CPC title
L* (lightness axis) · CPC title
Pore diameter · CPC title
by chromatography data, e.g. HPLC, gas chromatography · CPC title
obtained by SEM · CPC title
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- What does patent US11359689B2 cover?
- 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…
- Who is the assignee on this patent?
- Powdertech Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16D69/027. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 14 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).