# US 2019/0376573 A1 · Friction material

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- Number: US 2019/0376573 A1
- Document ID: US20190376573A1
- Status: Published application
- Kind: A1
- Application number: 16/485,260
- Filed: 2018-03-15
- Published: 2019-12-12
- Earliest claimed: 2017-03-15
- Assignees: Advics Co., Ltd.
- Applicants: Advics Co., Ltd.
- Inventors: Yuta KOIKE; Takuo YOSHIDA
- Web page: https://patentgrep.com/patent/US20190376573A1

## CPC

- F16D 69/026: {containing fibres}
- F16D 69/028: {containing fibres}
- F16D 65/12: Discs; Drums for disc brakes
- F16D 69/025: {Compositions based on an organic binder}
- F16D 2200/0008: Ferro
- F16D 2200/003: Light metals, e.g. aluminium
- F16D 2200/006: containing fibres or particles
- F16D 2200/0065: Inorganic, e.g. non-asbestos mineral fibres
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A friction material containing a fiber base material, a binder, an organic filler, and an inorganic filler, wherein the copper content in the friction material in terms of elemental copper is 0.5% by weight or less relative to the whole friction material, and a particulate or fibrous aluminum alloy and zinc oxide are contained as the inorganic filler.

## Claims

### Claim 1

A friction material comprising:
a fiber base material;
a binder;
an organic filler; and
an inorganic filler,
wherein
in the friction material, a content of copper as an element is less than or equal to 0.5 wt % relative to the whole friction material, and
a particulate or fibrous aluminum alloy and zinc oxide are contained as the inorganic filler.

### Claim 2 (depends on 1)

The friction material according to claim 1, wherein the aluminum alloy contains 70 to 85 wt % of an aluminum component.

### Claim 3 (depends on 1)

The friction material according to claim 1, wherein the aluminum alloy is contained in an amount of 0.3 to 3.0 wt % relative to the whole friction material.

### Claim 4 (depends on 1)

The friction material according to claim 1, wherein iron oxide is contained as the inorganic filler.

### Claim 5 (depends on 4)

The friction material according to claim 4, wherein the zinc oxide is contained by 1 to 10 wt % relative to the whole friction material, and the iron oxide is contained by 1 to 15 wt % relative to the whole friction material.

### Claim 6 (depends on 2)

The friction material according to claim 2, wherein the aluminum alloy is contained in an amount of 0.3 to 3.0 wt % relative to the whole friction material.

### Claim 7 (depends on 2)

The friction material according to claim 2, wherein iron oxide is contained as the inorganic filler.

### Claim 8 (depends on 3)

The friction material according to claim 3, wherein iron oxide is contained as the inorganic filler.

### Claim 9 (depends on 6)

The friction material according to claim 6, wherein iron oxide is contained as the inorganic filler.

### Claim 10 (depends on 7)

The friction material according to claim 7, wherein the zinc oxide is contained by 1 to 10 wt % relative to the whole friction material, and the iron oxide is contained by 1 to 15 wt % relative to the whole friction material.

### Claim 11 (depends on 8)

The friction material according to claim 8, wherein the zinc oxide is contained by 1 to 10 wt % relative to the whole friction material, and the iron oxide is contained by 1 to 15 wt % relative to the whole friction material.

### Claim 12 (depends on 9)

The friction material according to claim 9, wherein the zinc oxide is contained by 1 to 10 wt % relative to the whole friction material, and the iron oxide is contained by 1 to 15 wt % relative to the whole friction material.