Additive for rubber, rubber composition, and tire using the same

Patent metadata

Field	Value
Publication number	US-2021108048-A1
Application number	US-201716464508-A
Country	US
Kind code	A1
Filing date	Nov 29, 2017
Priority date	Nov 30, 2016
Publication date	Apr 15, 2021
Grant date	—

Abstract

An additive for rubber that enables a rubber composition to have excellent low heat generating property and processability, a rubber composition containing the additive for rubber, and a tire using the same are provided. A rubber composition comprises a hydrazone compound represented by the following Formula (I):

where R 1 and R 2 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 16, or an alkenyl group with a carbon number of 2 to 6, and A represents a group represented by the following Formula (A-1) or Formula (A-2):

First claim

1 . An additive for rubber, comprising
a hydrazone compound represented by the following Formula (I):

where R 1 and R 2 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 16, or an alkenyl group with a carbon number of 2 to 6, and A represents a group represented by the following Formula (A-1) or Formula (A-2):

where R 3 , R 4 , R 5 , and R 6 each independently represent a hydrogen atom, a hydroxy group, a group of —N(R 7 )(R 8 ), or a nitro group, R 7 and R 8 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 4, or an acyl group with a carbon number of 1 to 4, not both R 3 and R 4 are a hydrogen atom, and not both R 5 and R 6 are a hydrogen atom.

2 . The additive for rubber according to claim 1 , for use as a low heat generating agent.

3 . A rubber composition comprising:
a rubber component containing diene-based rubber; a filler; and the additive for rubber according to claim 1 .

4 . The rubber composition according to claim 3 , wherein a content of the additive for rubber is 0.05 parts to 30 parts by mass with respect to 100 parts by mass of the rubber component.

5 . The rubber composition according to claim 3 , wherein the diene-based rubber is natural rubber.

6 . The rubber composition according to claim 3 , wherein the filler includes carbon black.

7 . The rubber composition according to claim 3 , wherein a content of the filler is 10 parts to 160 parts by mass with respect to 100 parts by mass of the rubber component.

8 . A tire comprising
the rubber composition according to claim 3 .

9 . A hydrazone compound represented by the following Formula (I):

where R 1 and R 2 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 16, or an alkenyl group with a carbon number of 2 to 6, and A represents a group represented by the following Formula (A-1) or Formula (A-2):

where R 3 , R 4 , R 5 , and R 6 each independently represent a hydrogen atom, a hydroxy group, a group of —N(R 7 )(R 8 ), or a nitro group, R 7 and R 8 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 4, or an acyl group with a carbon number of 1 to 4, not both R 3 and R 4 are a hydrogen atom, and not both R 5 and R 6 are a hydrogen atom.

10 . The rubber composition according to claim 4 , wherein the diene-based rubber is natural rubber.

11 . The rubber composition according to claim 4 , wherein the filler includes carbon black.

12 . The rubber composition according to claim 4 , wherein a content of the filler is 10 parts to 160 parts by mass with respect to 100 parts by mass of the rubber component.

13 . A The rubber composition according to claim 5 , wherein the filler includes carbon black.

14 . The rubber composition according to claim 5 , wherein a content of the filler is 10 parts to 160 parts by mass with respect to 100 parts by mass of the rubber component.

15 . The rubber composition according to claim 6 , wherein a content of the filler is 10 parts to 160 parts by mass with respect to 100 parts by mass of the rubber component.

Assignees

• Bridgestone Corp
• Otsuka Chemical Co Ltd

Inventors

• Hamatani Satoshi
• Shinozaki Shinya
• Ueno Mifuyu
• Abe Masaki

Classifications

• B60C1/0016

  Compositions of the tread · CPC title

• C07C251/76 Primary

  to carbon atoms of a saturated carbon skeleton · CPC title

• C08L9/00

  Compositions of homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• C08K5/30 Primary

  Hydrazones; Semicarbazones · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title