Rubber composition and tire comprising sustainable resources and related methods

Patent metadata

Field	Value
Publication number	US-10227479-B2
Application number	US-201515538908-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Dec 23, 2014
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

Recycled elements and/or renewable resources, such as recycled carbon black or recycled carbon black and recycled particulate rubber, are incorporated into a rubber composition. The rubber composition can be used to manufacture tires or various tire components including tire subtreads.

First claim

What is claimed is:

1. A rubber composition comprising:
a rubber elastomer comprising at least 50 phr of natural rubber or polyisoprene,
a recycled particulate rubber in an amount of 1 phr to 75 phr;
1 to 75 phr of a plant oil; and
reinforcing filler including 1 to 80 phr of a recycled carbon black,

wherein the composition contains no more than 10 phr of any oil other than the plant oil and contains no more than 5 phr of any carbon black other than the recycled carbon black.

2. The rubber composition of claim 1 , wherein the plant oil comprises at least one of: soybean oil, palm oil, rapeseed oil, sunflower seed, peanut oil, cottonseed oil, oil produced from palm kernel, coconut oil, olive oil, corn oil, grape seed oil, hazelnut oil, a nut oil, hemp oil, linseed oil, rice oil, safflower oil, sesame oil, mustard oil, or flax oil.

3. The rubber composition of claim 1 , wherein the plant oil comprises soybean oil.

4. The rubber composition of claim 1 , wherein the plant oil consists of soybean oil.

5. The rubber composition of claim 1 comprising 5 phr to 30 phr of the plant oil.

6. The rubber composition of claim 1 , wherein at least one of the following is met:
a. the rubber elastomer comprises at least 70 phr of natural rubber or natural polyisoprene;
b. the rubber composition comprises 1 to 45 phr of recycled carbon black;
c. the recycled particulate rubber has a mean average particle size of about 35 to about 600 microns; or
d. the recycled particulate rubber is present in an amount from 3 phr to 45 phr.

7. A rubber composition comprising:
a rubber elastomer comprising at least 50 phr of natural rubber or polyisoprene;
a recycled particulate rubber in an amount of about 1 phr to about 75 phr;
about 1 to about 75 phr of a plant oil; and
reinforcing filler including about 1 to about 80 phr of a recycled carbon black and less than 5 phr of silica.

8. The rubber composition of claim 7 , wherein the plant oil comprises at least one of: soybean oil, palm oil, rapeseed oil, sunflower seed, peanut oil, cottonseed oil, oil produced from palm kernel, coconut oil, olive oil, corn oil, grape seed oil, hazelnut oil, a nut oil, hemp oil, linseed oil, rice oil, safflower oil, sesame oil, mustard oil, or flax oil.

9. The rubber composition of claim 7 , comprising about 5 phr to about 30 phr of the plant oil.

10. The rubber composition of claim 7 , wherein the rubber elastomer comprises at least 70 phr of natural rubber or natural polyisoprene.

11. The rubber composition of claim 7 , wherein the recycled carbon black is present in an amount of about 1 to about 45 phr.

12. The rubber composition of claim 7 , wherein the recycled particulate rubber has a mean average particle size of about 35 to about 600 microns.

13. The rubber composition of claim 7 , wherein the recycled particulate rubber is present in an amount from about 3 phr to about 45 phr.

14. The rubber composition of claim 7 , wherein the composition contains no more than 10 phr of any oil other than the plant oil and contains no more than 5 phr of any carbon black other than the recycled carbon black.

15. A tire tread or subtread comprising the rubber composition of claim 1 .

16. A tire tread or subtread comprising the rubber composition of claim 7 .

17. A tire subtread comprising a rubber composition comprising:
a rubber elastomer comprising at least 50 phr of natural rubber or polyisoprene,
a recycled particulate rubber in an amount of 1 phr to 75 phr;
1 to 75 phr of a plant oil; and
reinforcing filler including 1 to 80 phr of a recycled carbon black,

wherein the composition contains no more than 10 phr of any oil other than the plant oil and contains no more than 5 phr of any carbon black other than the recycled carbon black.

18. The tire subtread of claim 17 , wherein the reinforcing filler includes less than 5 phr of silica.

19. The tire subtread of claim 17 , wherein the recycled particular rubber has a U.S. mesh size of 400 to 25.

Assignees

• Bridgestone Americas Tire Operations Llc

Inventors

• Styer Justin J

Classifications

• C08L91/06

  Waxes · CPC title

• C08K3/04

  Carbon · CPC title

• C08K5/09

  Carboxylic acids; Metal salts thereof; Anhydrides thereof · CPC title

• C08L7/00 Primary

  Compositions of natural rubber · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title