Rubber composition for conveyor belt and conveyor belt

Patent metadata

Field	Value
Publication number	US-2022010103-A1
Application number	US-201917295276-A
Country	US
Kind code	A1
Filing date	Aug 30, 2019
Priority date	Nov 28, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present invention is to provide a rubber composition that can be a conveyor belt having excellent heat resistance and wear resistance, and a conveyor belt. An embodiment of the present invention is a rubber composition for a conveyor belt containing: per 100 parts by mass of a rubber component containing at least an ethylene-1-butene copolymer, from 1 to 10 parts by mass of antimony trioxide, and from 10 to 50 parts by mass of a compound represented by Formula (1). In Formula (1), R represents an aliphatic hydrocarbon group that may contain an unsaturated bond.

First claim

1 . A rubber composition for a conveyor belt comprising:
per 100 parts by mass of a rubber component containing at least an ethylene-1-butene copolymer, from 1 to 10 parts by mass of antimony trioxide, and from 10 to 50 parts by mass of a compound represented by Formula (1):

where R represents an aliphatic hydrocarbon group that may contain an unsaturated bond.

2 . The rubber composition for a conveyor belt according to claim 1 , wherein a total content of the antimony trioxide and the compound represented by Formula (1) is from 5 to 20 mass % relative to a total amount of the rubber composition for a conveyor belt.

3 . The rubber composition for a conveyor belt according to claim 1 , wherein a content of the compound represented by Formula (1) is from 1 to 10 times a content of the antimony trioxide.

4 . The rubber composition for a conveyor belt according to claim 1 , wherein the rubber component further contains an ethylene-propylene copolymer 1 having a weight average molecular weight of greater than 100000.

5 . The rubber composition for a conveyor belt according to claim 4 , wherein a mass ratio of the ethylene-propylene copolymer 1 to the ethylene-1-butene copolymer (ethylene-propylene copolymer 1/ethylene-1-butene copolymer) is from 5/95 to 95/5.

6 . The rubber composition for a conveyor belt according to claim 4 , wherein a mass ratio of the ethylene-propylene copolymer 1 to the ethylene-1-butene copolymer (ethylene-propylene copolymer 1/ethylene-1-butene copolymer) is from 20/80 to 75/25.

7 . The rubber composition for a conveyor belt according to claim 1 , further comprising a softener.

8 . The rubber composition for a conveyor belt according to claim 7 , wherein the softener contains at least an ethylene-propylene copolymer 2 having a weight average molecular weight of 100000 or less.

9 . The rubber composition for a conveyor belt according to claim 7 , wherein a mass ratio of the softener to the compound represented by Formula (1) (softener/compound represented by Formula (1)) is from 0.3 to 2.0.

10 . The rubber composition for a conveyor belt according to claim 7 , wherein a mass ratio of the softener to the compound represented by Formula (1) (softener/compound represented by Formula (1)) is from 0.67 to 0.80.

11 . The rubber composition for a conveyor belt according to claim 7 , wherein a content of the softener is from 5 to 30 parts by mass per 100 parts by mass of the rubber component.

12 . A conveyor belt produced by using the rubber composition for a conveyor belt according to claim 1 .

13 . The conveyor belt according to claim 12 , comprising a cover rubber formed by using the rubber composition for a conveyor belt.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• YAGIHASHI Saori

Classifications

• C08K3/2279

  of antimony · CPC title

• C08K5/03

  aromatic {, e.g. C6H5-CH2-Cl} · CPC title

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• B65G15/36

  the layers incorporating ropes, chains, or rolled steel sections · CPC title

• B65G15/38 Primary

  with flame-resistant layers, e.g. of asbestos, glass · CPC title