Low copper-containing friction material composition used as brake pad

• US 8,980,974 B2
• Filed: 06/22/2011
• Issued: 03/17/2015
• Est. Priority Date: 05/21/2011
• Status: Active Grant

• Current Assignee: Ruiyang Automotive Materials (Xiantao) Co., Ltd.
• Original Assignee: Ruiyang Automotive Materials (Xiantao) Co., Ltd.
• Inventors: Zhang, Jim Zewei
• Primary Examiner(s): KOLLIAS, ALEXANDER C
• Application Number:
  US14/118,873
• Publication Number:
  US 20150031788A1
• Time in Patent Office: 1,364 Days
• Field of Search: 524/433, 524/424, 524/428, 524/437, 524/540, 524/440, 524/442, 524/404, 523/149, 523/150, 523/153, 523/156
• US Class Current: 523/156
• CPC Class Codes: F16D 69/02 Composition of linings ; Methods of manufacturing
• CPC Class Codes: F16D 69/026 containing fibres

Abstract

A low copper-containing friction material composition used for brake pad is provided, which consists of 4-6 parts of aramid fiber, 2-2.5 parts of tire powder, 5-6 parts of magnesia, 5-6 parts of red vermiculite, 8-10 parts of ceramic fiber, 3.5-5 parts of magnetite, 7-8 parts of boron-containing phenolic resin, 15-17 parts of calcium sulfate crystal whisker, 16-18 parts of potassium titanate, 15-17 parts of barite, 5.5-7 parts of flake graphite, 6-8 parts of friction powder of cashew nut oil, 6-8 parts of calcined petroleum coke, 1.5-2 parts of boron nitride, 5-7 parts of flake aluminum powder, 0.4-0.5 parts of pure copper fiber, and 0.4-0.6 parts of black silicon carbide. The friction material composition has low content of heavy metal, wherein the content of copper is lower than 0.5%, has a satisfactory high temperature and thermal decay resistant performance, long service life, good abrasion resistance and stable friction coefficient.

Claims

1. A copper-containing friction material composition for a brake pad, wherein the amount copper is less than 0.5 wt. % based on the total copper-containing friction material composition, the copper-containing friction material composition consisting of:

4-6 parts by weight aramid fiber;

2-2.5 parts by weight tire powder;

5-6 parts by weight of heavy magnesia;

5-6 parts by weight red vermiculite;

8-10 parts by weight ceramic fiber;

3.5-5 parts by weight magnetite;

7-8 parts by weight boron-containing phenolic resin;

15-17 parts by weight calcium sulfate crystal whiskers;

16-18 parts by weight potassium titanate;

15-17 parts by weight barite;

5.5-7 parts by weight graphite flake;

6-8 parts by weight friction powder of cashew nut oil;

6-8 parts by weight calcined petroleum coke;

1.5-2 parts by weight boron nitride;

5-7 parts by weight aluminum powder flake;

0.4-0.5 parts by weight pure copper fiber; and

0.4-0.6 parts by weight black silicon carbide.

2. The copper-containing friction material of claim 1, wherein:

the aramid fiber is 4.5 parts by weight;

the tire powder is 2.5 parts by weight;

the magnesia is 6 parts by weight;

the red vermiculite is 5.7 parts by weight;

the ceramic fiber is 9.5 parts by weight;

the magnetite is 5 parts by weight;

the boron-containing phenolic resin is 7.7 parts by weight;

the calcium sulfate crystal whisker is 16 parts by weight;

the potassium titanate is 16.7 parts by weight;

the barite is 16 parts by weight of barite;

the graphite flake is 6 parts by weight;

the friction powder of cashew nut oil is 7.5 parts by weight;

the calcined petroleum coke is 7 parts by weight;

the boron nitride 1.5 parts by weight;

the aluminum flake powder is 5.5 parts by weight;

the pure copper fiber is 0.43 parts by weight; and

the silicon carbide is 0.5 parts by weight.

3. The copper-containing friction material of claim 1, wherein:

the aramid fiber is 5 parts by weight;

the tire powder is 2.3 parts by weight;

the magnesia is 5.7 parts by weight;

the red vermiculite is 5.5 parts by weight;

the ceramic fiber is 10 parts by weight;

the magnetite is 4.7 parts by weight;

the boron-containing phenolic resin is 7.3 parts by weight;

the calcium sulfate crystal whisker is 16.3 parts by weight;

the potassium titanate is 16.7 parts by weight;

the barite is 15.5 parts by weight of barite;

the graphite flake is 6.2 parts by weight;

the friction powder of cashew nut oil is 6.9 parts by weight;

the calcined petroleum coke is 7.3 parts by weight;

the boron nitride 1.7 parts by weight;

the aluminum flake powder is 5.5 parts by weight;

the pure copper fiber is 0.46 parts by weight; and

the silicon carbide is 0.6 parts by weight.