# US 10,479,878 B2 · Anti-vibration rubber composition

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- Number: US 10,479,878 B2
- Document ID: US10479878B2
- Status: Granted
- Kind: B2
- Application number: 15/432,276
- Filed: 2017-02-14
- Published: 2017-06-01
- Granted: 2019-11-19
- Earliest claimed: 2014-09-29
- Assignees: Sumitomo Riko Company Limited
- Applicants: Sumitomo Riko Company Limited
- Inventors: Keiichi Muratani; Kenji Yamamoto
- Web page: https://patentgrep.com/patent/US10479878B2

## CPC

- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- C08K 3/04: Carbon
- C08K 3/22: of metals
- C08K 3/36: Silica
- C08K 5/02: Halogenated hydrocarbons {(C08K5/0091 takes precedence)}
- C08L 7/00: Compositions of natural rubber
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- F16F 1/3605: {characterised by their material (F16F1/362, F16F1/364, F16F1/366, F16F1/37 take precedence; composition of macromolecular compounds in general C08L)}
- F16F 15/08: with rubber springs {(grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38); with springs made of rubber and metal (arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604)}
- C08K 3/105: Compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table
- C08K 3/2279: {of antimony}
- C08K 5/34924: {containing cyanurate groups; Tautomers thereof}
- C08K 5/521: Esters of phosphoric acids, e.g. of H3PO4
- C08K 2003/2227: {of aluminium}
- C08K 2201/003: Additives being defined by their diameter
- C08L 2666/54: Inorganic substances
- F16F 2224/025: Elastomers
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION

## Abstract

Provided is an anti-vibration rubber composition, including: the following component (A); and the following components (B) and (C), in which a blending amount of the component (B) falls within a range of from 15 parts by weight to 60 parts by weight with respect to 100 parts by weight of the component (A), and a blending amount of the component (C) falls within a range of from 50 parts by weight to 150 parts by weight with respect thereto. Thus, the anti-vibration rubber composition is excellent in anti-vibration rubber properties, such as rubber physical properties and durability, and is excellent in flame retardancy. (A) A diene-based rubber. (B) A halogen-based flame retardant having a melting point of 150° C. or less. (C) Aluminum hydroxide having an average particle diameter of 0.75 μm or less.

## Claims

### Claim 1

An anti-vibration rubber composition, comprising:
(A) a diene-based rubber;
(B) a halogen-based flame retardant having a melting point of 150° C. or less; and
(C) aluminum hydroxide having an average particle diameter of 0.4 μm or less,
wherein a blending amount of the halogen-based flame retardant (B) falls within a range of from 15 parts by weight to 60 parts by weight with respect to 100 parts by weight of the diene-based rubber (A), and a blending amount of the aluminum hydroxide (C) falls within a range of from 50 parts by weight to 150 parts by weight with respect to 100 parts by weight of the diene-based rubber (A).

### Claim 2 (depends on 1)

The anti-vibration rubber composition according to claim 1, further comprising a silane coupling agent.

### Claim 3 (depends on 2)

The anti-vibration rubber composition according to claim 2, wherein the silane coupling agent comprises at least one of sulfide-based silane coupling agent and mercapto-based silane coupling agent.

### Claim 4 (depends on 2)

The anti-vibration rubber composition according to claim 2, wherein a blending amount of the silane coupling agent falls within a range of from 0.2 part by weight to 20 parts by weight with respect to 100 parts by weight of the diene-based rubber (A).

### Claim 5 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the diene-based rubber (A) comprises at least one selected from the group consisting of a natural rubber, an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, an acrylonitrile-butadiene rubber, and an ethylene-propylene-diene-based rubber.

### Claim 6 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the halogen-based flame retardant (B) comprises a halogen-based flame retardant having a melting point of 120° C. or less.

### Claim 7 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the halogen-based flame retardant (B) comprises at least one of a bromine-based flame retardant and a chlorine-based flame retardant.

### Claim 8 (depends on 7)

The anti-vibration rubber composition according to claim 7, wherein the bromine-based flame retardant comprises at least one selected from the group consisting of bis(dibromopropyl)tetrabromobisphenol A, bis(dibromopropyl)tetrabromobisphenol S, tris(dibromopropyl) isocyanurate, tris(tribromoneopentyl) phosphate, and a brominated epoxy resin.

### Claim 9 (depends on 7)

The anti-vibration rubber composition according to claim 7, wherein the chlorine-based flame retardant comprises at least one of chlorinated paraffin and chlorinated polyethylene.

### Claim 10 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the blending amount of the aluminum hydroxide (C) falls within a range of from 70 parts by weight to 100 parts by weight with respect to 100 parts by weight of the diene-based rubber (A).

### Claim 11 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the blending amount of the aluminum hydroxide (C) falls within a range of from 70 parts by weight to 80 parts by weight with respect to 100 parts by weight of the diene-based rubber (A).

### Claim 12 (depends on 1)

The anti-vibration rubber composition according to claim 1, further comprising an antimony-based flame retardant.

### Claim 13 (depends on 12)

The anti-vibration rubber composition according to claim 12, wherein the antimony-based flame retardant comprises an antimony-based flame retardant having a particle diameter of 0.5 μm or less.

### Claim 14 (depends on 1)

The anti-vibration rubber composition according to claim 1, wherein the anti-vibration rubber composition further comprises a reinforcing agent which comprises at least one of carbon black and silica.

### Claim 15 (depends on 14)

The anti-vibration rubber composition according to claim 14, wherein a blending amount of the reinforcing agent falls within a range of from 10 parts by weight to 100 parts by weight with respect to 100 parts by weight of the diene-based rubber (A).

### Claim 16 (depends on 1)

A vulcanized body of the anti-vibration rubber composition of claim 1.