# US 12,110,395 B2 · Rubber composition, crosslinked body, and tire

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- Number: US 12,110,395 B2
- Document ID: US12110395B2
- Status: Granted
- Kind: B2
- Application number: 17/423,639
- Filed: 2020-01-27
- Published: 2022-03-03
- Granted: 2024-10-08
- Earliest claimed: 2019-01-30
- Assignees: ENEOS Materials Corporation
- Applicants: Eneos Materials Corporation
- Inventors: Masaaki Inoue
- Web page: https://patentgrep.com/patent/US12110395B2

## CPC

- C08L 9/06: Copolymers with styrene
- B60C 1/0016: {Compositions of the tread}
- B60C 1/0025: {Compositions of the sidewalls}
- C08C 19/02: Hydrogenation
- C08C 19/22: Incorporating nitrogen atoms into the molecule
- C08C 19/25: Incorporating silicon atoms into the molecule
- C08C 19/44: of polymers containing metal atoms exclusively at one or both ends of the skeleton
- C08K 3/06: Sulfur
- C08L 7/00: Compositions of natural rubber
- C08L 15/00: Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence)
- C08L 23/06: Polyethylene
- C08L 53/025: {modified}
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2207/04: Thermoplastic elastomer
- 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
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Provided is a rubber composition containing: (A) a polymer which has a carbon-carbon unsaturated bond and in which a value a represented by the following equation (i) is 0.70 or more and 0.99 or less when p, q, r, and s are defined as constituent proportions (molar proportions), in the polymer, of a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), a structural unit represented by the following formula (3), and a structural unit represented by the following formula (4), respectively; and (B) a thermoplastic resin, in which the polymer (A) is contained in an amount of 60% to 95% by mass relative to the total amount of the polymer (A) and the resin (B), α=(p+(0.5×r))/(p+q+(0.5×r)+s) (i)

## Claims

### Claim 1

A rubber composition, comprising:
(A) a polymer which has a carbon-carbon unsaturated bond, and in which a value a represented by the following equation (i) is 0.70 or more and 0.99 or less when p, q, r, and s are defined as constituent molar proportions, in the polymer, of a structural unit represented by the following formula (1), a structural unit represented by the following formula (2), a structural unit represented by the following formula (3), and a structural unit represented by the following formula (4), respectively; and
(B) a thermoplastic resin,
wherein the polymer (A) is contained in an amount of 60% to 95% by mass and the resin (B) is contained in an amount of 5% to 40% by mass relative to a total amount of the polymer (A) and the resin (B), the resin (B) is a styrene-based resin and the styrene-based resin is a block polymer having a conjugated diene-based polymer block and a polystyrene-based block,
α=(p+(0.5×r))/(p+q+(0.5×r)+s) (i)

### Claim 2 (depends on 1)

The rubber composition according to claim 1, wherein the polymer (A) has one or more functional groups selected from the group consisting of an amino group, a nitrogen-containing heterocyclic group, a phosphino group, a hydroxyl group, a thiol group, and a hydrocarbyloxysilyl group.

### Claim 3 (depends on 1)

The rubber composition according to claim 1, wherein the polymer (A) has a partial structure derived from at least one selected from the group consisting of a compound represented by the following formula (9), a compound represented by the following formula (10), a compound represented by the following formula (11), and a compound represented by the following formula (12)
where A1 is a monovalent functional group having at least one atom selected from the group consisting of nitrogen, phosphorus, oxygen, sulfur and silicon and bonding to R5 with a nitrogen atom, a phosphorus atom, an oxygen atom, a sulfur atom, a silicon atom or a carbon atom contained in a carbonyl group, or a (thio)epoxy group; R3 and R4 are hydrocarbyl groups, R5 is a hydrocarbylene group, and r is an integer of 0 to 2; provided that when there is more than one R3, R3s are the same group or different groups from each other; and provided that when there is more than one R4, R4s are the same group or different groups from each other;
where A2 is a monovalent functional group having at least one atom selected from the group consisting of nitrogen, phosphorus, oxygen, sulfur and silicon, having no active hydrogen, and bonding to R9 with a nitrogen atom, a phosphorus atom, an oxygen atom, a sulfur atom or a silicon atom, or a hydrocarbyl group having 1 to 20 carbon atoms; R6 and R7 are each independently a hydrocarbyl group; R8 is a hydrocarbylene group; R9 is a single bond or a hydrocarbylene group, and m is 0 or 1; and provided that when there is more than one R7, R7s are the same group or different groups from each other;
where A3 is a monovalent group bonding to L2 with an imino group, an amide group, a (thio)carbonyl group, a (thio)carbonyloxy group, a sulfide group or a polysulfide group, or is a protected primary amino group, a protected secondary amino group, a tertiary amino group, a nitrile group, a pyridyl group, a (thio)epoxy group, a (thio)isocyanate group, a (thio)formyl group, a (thio)carboxylic acid ester group, a metal salt of a (thio)carboxylic acid ester group, —COX1 (in which X1 is a halogen atom, an imidazolyl group or a group represented by the following formula (11a); L2 and L3 are each independently a single bond or a hydrocarbylene group having 1 to 20 carbon atoms, and R9 and R10 are each independently a hydrocarbyl group, K is an integer of 0 to 2, and j is 0 or 1; and when the formula includes more than one of the same symbols for each symbol of R9, R10 and L3, the groups represented by the symbols are the same group or different groups from each other; when there is more than one k in the formula, and k's are the same number or different numbers;
where L4 is a single bond or a hydrocarbylene group having 1 to 20 carbon atoms, and R11 and R12 are each independently a hydrocarbyl group, and i is an integer of 0 to 3; “*” represents a site that bonds to L2; for each symbol of R11, R12, and L4, the groups represented by the symbols are the same group or different groups from each other; and more than one i in the formula is the same number or different numbers; and
where A4 is an imino group, an amide group, a (thio)carbonyl group, or a (thio)carbonyloxy group; Z1 is a t-valent group having 1 to 20 carbon atoms and having a nitrogen atom or having no nitrogen atom; L5 is a single bond or a hydrocarbylene group having 1 to 20 carbon atoms; L6 is a hydrocarbylene group having 1 to 20 carbon atoms; and R13 and R14 are each independently a hydrocarbyl group, h is 0 or 1 and t is 2 or 3; for each symbol of R14, L5, L6, and A4, the groups represented by the symbols are the same group or different groups from each other; and more than one h in the formula is the same number or different numbers.

### Claim 4 (depends on 1)

The rubber composition according to claim 1, further comprising: a crosslinking agent.

### Claim 5 (depends on 1)

A crosslinked body, which is obtained by using the rubber composition according to claim 1.

### Claim 6 (depends on 5)

A tire in which one or both of a tread and a sidewall are formed by the crosslinked body according to claim 5.