Elastomeric composition with improved thermal conductivity

Patent metadata

Field	Value
Publication number	US-9499730-B2
Application number	US-201314405993-A
Country	US
Kind code	B2
Filing date	Jun 10, 2013
Priority date	Jun 12, 2012
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A rubber composition based on at least one diene elastomer, a filler that contains carbon black and an inorganic filler, and a crosslinking system, wherein the inorganic filler content is greater than or equal to 5 parts by weight per hundred parts by weight of elastomer, phr, and represents at most 50% as a weight fraction of the whole of the total filler of the composition, and wherein the carbon black includes at least one acetylene-derived carbon black, with a content of greater than 3 phr, the amount of acetylene-derived carbon black representing more than 50% of the carbon black present in the composition as a weight fraction, and wherein the composition contains a plasticizing oil or a plasticizing resin with a total content of plasticizing oil and plasticizing resin of less than 30 phr.

First claim

The invention claimed is:

1. A rubber composition based on at least one diene elastomer, a filler that comprises carbon black and an inorganic filler, and a crosslinking system,
wherein the inorganic filler content is from 8 to 30 parts by weight per hundred parts by weight of elastomer, phr, and represents at most 50% as a weight fraction of the total filler of the composition
wherein the carbon black comprises at least one acetylene-derived carbon black, wherein the acetylene-derived carbon black content is from 10 to 40 phr,
wherein the amount of acetylene-derived carbon black represents more than 50% of the carbon black present in the composition as a weight fraction, and
wherein the composition comprises a plasticizing oil, aplasticizing resin, or both, with a total content of plasticizing oil and plasticizing resin of less than 30 phr.

2. The rubber composition according to claim 1 , wherein the amount of acetylene-derived carbon black represents more than 50% of the total filler present in the composition, as a weight fraction.

3. The rubber composition according to claim 1 , wherein the inorganic filler content represents more than 30% as a weight fraction of the total filler of the composition.

4. The rubber composition according to claim 3 , wherein the inorganic filler content represents more than 40% as a weight fraction of the total filler of the composition.

5. The rubber composition according to claim 1 , wherein the amount of acetylene black represents more than 90% of the carbon black present in the composition, as a weight fraction.

6. The rubber composition according to claim 1 , wherein the inorganic filler comprises silica.

7. The rubber composition according to claim 6 , wherein the silica is a precipitated silica.

8. The rubber composition according to claim 6 , wherein the inorganic filler consists of silica.

9. The rubber composition according to claim 1 , wherein the total filler content is from 20 to 150 phr.

10. The rubber composition according to claim 1 , wherein the acetylene-derived carbon black content is equal to 10 phr.

11. The rubber composition according to claim 1 , wherein the inorganic filler content is equal to 8 phr.

12. The rubber composition according to claim 1 , wherein the inorganic filler content is from 12 to 30 phr.

13. The rubber composition according to claim 1 , wherein the total content of plasticizing oil and plasticizing resin is from 0 to 5 phr.

14. The rubber composition according to claim 1 , wherein the diene elastomer is selected from the group consisting of polybutadienes, synthetic polyisoprenes, natural rubber, butadiene copolymers, isoprene copolymers and mixtures of these elastomers.

15. A finished or semi-finished article comprising a rubber composition according to claim 1 .

16. A tire tread comprising, at least partially, a rubber composition according to claim 1 .

17. A tire or semi-finished product comprising at least one rubber composition according to claim 1 .

Assignees

• Michelin & Cie
• Michelin Rech Tech

Inventors

• Joseph Jr Aurelie
• De Gaudemaris Benoit
• Sevignon Marc

Classifications

• C08L7/00

  Compositions of natural rubber · CPC title

• B29C43/24

  Calendering · CPC title

• C08K3/36

  Silica · CPC title

• B29L2007/00

  Flat articles, e.g. films or sheets (B29L2024/00 takes precedence) · CPC title

• B29K2507/04

  Carbon · CPC title