# US 11,999,854 B2 · Rubber composition

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- Number: US 11,999,854 B2
- Document ID: US11999854B2
- Status: Granted
- Kind: B2
- Application number: 17/606,392
- Filed: 2020-04-27
- Published: 2022-06-23
- Granted: 2024-06-04
- Earliest claimed: 2019-04-25
- Assignees: Compagnie Generale Des Etablissements Michelin
- Applicants: Compagnie Generale Des Etablissements Michelin
- Inventors: Tenko Hayashi; Christine Nourry
- Web page: https://patentgrep.com/patent/US11999854B2

## CPC

- C08L 9/06: Copolymers with styrene
- B60C 1/0016: {Compositions of the tread}
- C08L 15/00: Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence)
- C08L 57/02: Copolymers of mineral oil hydrocarbons
- C08C 19/25: Incorporating silicon atoms into the molecule
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/03: containing three or more polymers in a blend
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- C08C: TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

## Abstract

A rubber composition is based on at least an elastomer matrix, a reinforcing filler comprising a reinforcing inorganic filler, and a plasticizing agent comprising a hydrocarbon resin and a liquid plasticizer comprising a vegetable oil and a liquid diene polymer bearing at least one silane function, wherein the amount in phr of hydrocarbon resin is higher than that of the liquid diene polymer, and wherein the amount in phr of vegetable oil is higher than one-third of the amount in phr of the liquid diene polymer.

## Claims

### Claim 1

A rubber composition based on at least:
an elastomer matrix;
a reinforcing filler comprising a reinforcing inorganic filler; and
a plasticizing agent comprising a hydrocarbon resin and a liquid plasticizer comprising a vegetable oil and a liquid diene polymer bearing at least one silane function,
wherein the amount in phr of hydrocarbon resin is higher than that of the liquid diene polymer, and
wherein the amount in phr of vegetable oil is higher than one-third of the amount in phr of the liquid diene polymer.

### Claim 2 (depends on 1)

The rubber composition according to claim 1, wherein the elastomer matrix comprises at least one first diene elastomer bearing at least one SiOR function, R being hydrogen atom or a hydrocarbon radical.

### Claim 3 (depends on 2)

The rubber composition according to claim 2, wherein the at least one first diene elastomer is a styrene-butadiene copolymer.

### Claim 4 (depends on 1)

The rubber composition according to claim 1, wherein the amount of the reinforcing inorganic filler is more than 90 phr.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

The rubber composition according to claim 1, wherein the reinforcing filler further comprises less than 10 phr of carbon black.

### Claim 7 (depends on 1)

The rubber composition according to claim 1, wherein the amount of the liquid diene polymer is at most 25 phr.

### Claim 8 (depends on 1)

The rubber composition according to claim 1, wherein the liquid diene polymer has a glass transition temperature of less than −60° C.

### Claim 9 (depends on 1)

The rubber composition according to claim 1, wherein the liquid diene polymer has a number average molar mass of less than 6000 g/mol.

### Claim 10 (depends on 1)

The rubber composition according to claim 1, wherein the liquid diene polymer comprises 1,3-butadiene derived monomer units being 1,2-vinyl, 1,4-trans and 1,4-cis,
wherein a proportion of 1,2-vinyl in an entirety of the 1,3-butadiene derived monomer units present in the liquid diene polymer is less than 40 mol %, and
wherein a sum of proportions of 1,4-trans and 1,4-cis in the entirety of the 1,3-butadiene derived monomer units present in the liquid diene polymer is more than 60 mol %.

### Claim 11 (depends on 1)

The rubber composition according to claim 1, wherein the liquid diene polymer is a liquid polybutadiene.

### Claim 12 (depends on 1)

The rubber composition according to claim 1, wherein the amount of the vegetable oil is more than 5 phr.

### Claim 13 (depends on 1)

The rubber composition according to claim 1, wherein the vegetable oil is selected from the group consisting of linseed oil, safflower oil, soybean oil, corn oil, cottonseed oil, turnip seed oil, castor oil, tung oil, pine oil, sunflower oil, palm oil, olive oil, coconut oil, groundnut oil, grapeseed oil, and the combinations thereof.

### Claim 14 (depends on 1)

The rubber composition according to claim 1, wherein the amount of the hydrocarbon resin is more than 10 phr.

### Claim 15 (depends on 1)

The rubber composition according to claim 1, wherein the amount in phr of the hydrocarbon resin is higher than that of the vegetable oil.

### Claim 16 (depends on 1)

The rubber composition according to claim 1, wherein the amount in phr of the hydrocarbon resin is higher than the total amount in phr of the vegetable oil and the liquid polymer.

### Claim 17 (depends on 1)

The rubber composition according to claim 1, wherein the hydrocarbon resin is selected from the group consisting of cyclopentadiene homopolymer or copolymer resins, dicyclopentadiene homopolymer or copolymer resins, terpene homopolymer or copolymer resins, C5 fraction homopolymer or copolymer resins, C9 fraction homopolymer or copolymer resins, alpha-methyl styrene homopolymer or copolymer resins, and combinations thereof.

### Claim 18 (depends on 1)

A tire tread comprising a rubber composition according to claim 1.