# US 4,394,478 A · Oxidized carbonaceous materials and vulcanized and vulcanizable rubber compositions reinforced with such carbonaceous materials

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- Number: US 4,394,478 A
- Document ID: US4394478A
- Status: Granted
- Kind: A
- Application number: 06/278,921
- Filed: 1981-06-29
- Granted: 1983-07-19
- Earliest claimed: 1981-06-29
- Assignees: TRW Inc.
- Inventors: Jon W. Martin
- Web page: https://patentgrep.com/patent/US4394478A

## CPC

- C08K 3/22: of metals
- C08K 3/11: Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Oxidized carbonaceous materials suitable for reinforcing such diene rubbers as styrene-butadiene rubber and natural rubber include carbon, oxidized iron dispersed in, intimately associated with and at least partially bonded to the carbon, and hydrogen.

## Claims

### Claim 1

A composition comprising a major amount of diene rubber and a minor amount of oxidized carbonaceous material comprising carbon in an amount of about 80% to about 99%; oxidized iron dispersed in, intimately associated with and at least partially bonded to the carbon in an amount of about 1% to about 15%; and hydrogen in an amount of about 0.1% to about 1.5% by weight.

### Claim 2 (depends on 1)

The composition of claim 1 wherein said diene rubber is styrene-butadiene rubber, said styrene-butadiene rubber comprising an amount of about 90% to about 45% by weight of the composition and the carbonaceous material comprising an amount from about 5% to about 40% by weight of said composition.

### Claim 3 (depends on 1)

The composition of claim 1 wherein said diene rubber is selected from the group consisting of styrene-butadiene rubber, natural rubber amd mixtures thereof, said rubber comprising an amount of about 90% to about 45% by weight of said composition and the carbonaceous material comprising an amount of about 5% to about 40% by weight of said composition.