Friction material

Patent metadata

Field	Value
Publication number	US-10151367-B2
Application number	US-201715798441-A
Country	US
Kind code	B2
Filing date	Oct 31, 2017
Priority date	Nov 1, 2016
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A friction material includes a fiber base material, a friction modifier and a binder. The friction modifier includes two or more kinds of titanate compounds. The two or more kinds of titanate compounds have a median diameter (D50) of 20 μm or more. At least one of the two or more kinds of titanate compounds is a porous titanate compounds. The friction material includes no copper component.

First claim

The invention claimed is:

1. A friction material comprising a fiber base material, a friction modifier and a binder, wherein
the friction modifier comprises two or more kinds of titanate compounds,
the two or more kinds of titanate compounds have a median diameter (D50) of 20 μm or more,
the two or more kinds of titanate compounds include a porous titanate compound having a median diameter (D50) of 70 μm to 200 μm and a titanate compound other than the porous titanate compound having a median diameter (D50) of 20 μm to 60 μm, and
the friction material comprises no copper component.

2. The friction material according to claim 1 , wherein all of the two or more kinds of titanate compounds are potassium titanate.

3. The friction material according to claim 2 , wherein the potassium titanate is potassium hexatitanate.

4. The friction material according to claim 1 , wherein a content of the two or more kinds of titanate compounds is from 5 to 40% by volume in total.

5. The friction material according to claim 1 , wherein a content of the porous titanate compound is from 1 to 20% by volume.

6. The friction material according to claim 1 , wherein a content of the titanate compound other than the porous titanate compound is from 3 to 20% by volume.

7. The friction material according to claim 1 , wherein the friction modifier comprises the two kinds of titanate compounds, and a volume ratio of the porous titanate compound to the titanate compound other than the porous titanate compound is from 1/10 to 5/1.

8. The friction material according to claim 4 , wherein all of the two or more kinds of titanate compounds are potassium titanate.

9. The friction material according to claim 5 , wherein all of the two or more kinds of titanate compounds are potassium titanate.

10. The friction material according to claim 6 , wherein all of the two or more kinds of titanate compounds are potassium titanate.

11. The friction material according to claim 1 , wherein a content of the two or more kinds of titanate compounds is from 10 to 30% by volume in total.

12. The friction material according to claim 1 , wherein a content of the two or more kinds of titanate compounds is from 15 to 25% by volume in total.

13. The friction material according to claim 2 , wherein a content of the two or more kinds of titanate compounds is from 5 to 40% by volume in total.

14. The friction material according to claim 7 , wherein a content of the two or more kinds of titanate compounds is from 5 to 40% by volume in total.

15. The friction material according to claim 8 , wherein a content of the two or more kinds of titanate compounds is from 5 to 40% by volume in total.

16. The friction material according to claim 9 , wherein a content of the two or more kinds of titanate compounds is from 5to 40% by volume in total.

17. The friction material according to claim 1 , wherein the porous titanate compound has a specific surface area of 1 to 13 m 2 /g.

18. The friction material according to claim 1 , wherein the titanate compound other than the porous titanate compound has a specific surface area of 0.1 to 2.0 m 2 /g.

19. The friction material according to claim 1 , wherein the porous titanate compound has a specific surface area of 3 to 9 m 2 /g, and the titanate compound other than the porous titanate compound has a specific surface area of 0.2 to 1.5 m 2 /g.

Assignees

• Akebono Brake Ind

Inventors

• Iwai Yu
• Maruta Saki
• Kawashima Yoichi
• Isobe Hiroshi

Classifications

• C09K3/14

  Anti-slip materials; Abrasives {(products specifically intended for the fabrication of abrasive tools, blocks or papers, or for operations of the kind of sand-blasting and barrelling B24B31/14, B24C1/00; polishing compositions containing abrasive or grinding agents C09G1/02; friction compositions for brakes or clutches F16D69/02; polishing of semi-conductors H10P52/40)} · CPC title

• F16D2200/0065

  Inorganic, e.g. non-asbestos mineral fibres · CPC title

• C04B35/80

  Fibres, filaments, whiskers, platelets, or the like · CPC title

• F16D2200/0086

  Moulding materials together by application of heat and pressure · CPC title

• C04B35/462

  based on titanates · CPC title