Rubber composition comprising a specific hydrocarbonated resin

Patent metadata

Field	Value
Publication number	US-2018001702-A1
Application number	US-201515538687-A
Country	US
Kind code	A1
Filing date	Dec 18, 2015
Priority date	Dec 22, 2014
Publication date	Jan 4, 2018
Grant date	—

Abstract

A rubber composition is based on at least one diene elastomer, a reinforcing filler, a crosslinking system and a hydrocarbon-based resin. The hydrocarbon-based resin has a number-average molecular weight (Mn) of between 700 and 1000 g/mol, an average molecular weight Mz of greater than 6000 g/mol and a polydispersity index (PI) of greater than 2.4.

First claim

1 .- 15 . (canceled)

16 . A rubber composition comprising at least one diene elastomer, a reinforcing filler, a crosslinking system and a hydrocarbon-based resin,
wherein said hydrocarbon-based resin has a number-average molecular weight Mn of between 700 and 1000 g/mol, an average molecular weight Mz of greater than 6000 g/mol and a polydispersity index PI of greater than 2.4.

17 . The rubber composition according to claim 16 , wherein the at least one diene elastomer is selected from the group consisting of essentially unsaturated diene elastomers.

18 . The rubber composition according to claim 16 , wherein the at least one diene elastomer is selected from the group consisting of polybutadienes, synthetic polyisoprenes, natural rubber, butadiene copolymers, isoprene copolymers and mixtures thereof.

19 . The rubber composition according to claim 16 , wherein a predominant diene elastomer is selected from the group consisting of polybutadienes, copolymers of butadiene and styrene, and natural rubber.

20 . The rubber composition according to claim 16 , wherein the reinforcing filler is selected from the group consisting of silicas, carbon blacks and mixtures thereof.

21 . The rubber composition according to claim 16 , wherein a content of reinforcing filler is within a range extending from 5 to 200 phr.

22 . The rubber composition according to claim 21 , wherein the content of reinforcing filler is within a range extending from 40 to 160 phr.

23 . The rubber composition according to claim 16 , wherein a content of the hydrocarbon-based resin is within a range extending from 1 to 15 phr.

24 . The rubber composition according to claim 23 , wherein the content of the hydrocarbon-based resin is within a range extending from 2 to 12 phr.

25 . The rubber composition according to claim 24 , wherein the content of the hydrocarbon-based resin is within a range extending from 3 to 10 phr.

26 . The rubber composition according to claim 25 , wherein the content of the hydrocarbon-based resin is within a range extending from 3 to 8 phr.

27 . The rubber composition according to claim 16 , wherein the Mn of the hydrocarbon-based resin is between 800 and 1000 g/mol.

28 . The rubber composition according to claim 16 , wherein the Mz of the hydrocarbon-based resin is within a range extending from 6000 to 8000 g/mol.

29 . The rubber composition according to claim 16 , wherein the PI of the hydrocarbon-based resin is within a range extending from 2.4 to 2.8.

30 . The rubber composition according to claim 16 , wherein the hydrocarbon-based resin is selected from the group consisting of aliphatic hydrocarbon-based resins and mixtures thereof.

31 . The rubber composition according to claim 16 further comprising a plasticizing system.

32 . The rubber composition according to claim 31 , wherein the plasticizing system comprises a hydrocarbon-based resin with a Tg of greater than 20° C., a plasticizing oil, or a combination thereof.

33 . A tire comprising a composition according to claim 16 .

Assignees

• Michelin & Cie
• Michelin Rech Tech

Inventors

• Chatard Julien
• De Gaudemaris Benoit
• Hut Alain
• Hellot Fabien
• Dimier Francois

Classifications

• C08K3/06

  Sulfur · CPC title

• C08L45/00

  Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers (of cyclic anhydrides or imides C08L35/00; of cyclic esters of polyfunctional acids C08L31/00) · CPC title

• C08F2500/02

  Low molecular weight, e.g. <100,000 Da. · CPC title

• C08K5/18

  with aromatically bound amino groups · CPC title

• C08K2003/2296

  of zinc · CPC title