Rubber mixture, vulcanizate of the rubber mixture, and vehicle tires

Patent metadata

Field	Value
Publication number	US-10577488-B2
Application number	US-201716097847-A
Country	US
Kind code	B2
Filing date	Feb 20, 2017
Priority date	May 4, 2016
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

A vulcanizate of a rubber mixture for a vehicle tire, the rubber mixture containing at least one filler and 10 to 100 phr of at least one polymer A of the following formula:

P S—R 1 —S—R 2 ) n

where S is a sulfur atom, and P is a polymer chain which is obtainable by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified, R 1 is most preferably C 1 -C 8 -alkyl, R 2 is preferably selected from H and —SiR 3 R 4 R 5 in which R 3 , R 4 and R 5 are independently selected from H, C 1 -C 16 -alkyl, C 6 -C 16 -aryl and C 7 -C 16 -aralkyl, and n is an integer selected from 1 to 200, where the —S—R 1 —S—R 2 group(s) are bonded to the backbone of the polymer chain P.

First claim

The invention claimed is:

1. A sulfur-crosslinkable rubber mixture comprising at least the following constituents:
at least one filler; and,
10 to 100 phr of at least one polymer A of the following formula I):
P S—R 1 —S—R 2 ) n   I)

wherein
S is a sulfur atom,
P is a polymer chain which is obtained by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified,
R 1 is selected from C 1 -C 8 -alkyl,
R 2 is selected from —SiR 3 R 4 R 5 in which R 3 , R 4 and R 5 are selected from H, C 1 -C 16 -alkyl, C 6 -C 16 -aryl and C 7 -C 16 -aralkyl, and
n is an integer selected from 1 to 200; and,
wherein the —S—R 1 —S—R 2 group(s) are bonded to the backbone of the polymer chain P.

2. The rubber mixture as claimed in claim 1 , wherein the at least one conjugated diene is selected from the group consisting of 1,3-butadiene, 2-(C 1 -C 5 -alkyl)-1,3-butadiene, especially isoprene (2-methyl-1,3-butadiene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2,4-hexadiene, 1,3-hexadiene, 1,3-heptadiene, 1,3-octadiene, 2-methyl-2,4-pentadiene, cyclopentadiene and 1,3-cyclooctadiene.

3. The rubber mixture as claimed in claim 2 , wherein the at least one conjugated diene is 1,3-butadiene.

4. The rubber mixture as claimed in claim 1 , wherein the vinylaromatic compound is selected from the group consisting of styrene, C 1 -C 4 -alkyl-substituted styrene, especially 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2,4-dimethylstyrene, 2,4,6-trimethylstyrene, α-methylstyrene, 2,4-diisopropylstyrene and 4-tert-butylstyrene, stilbene, vinylbenzyldimethylamine, 4-vinylbenzyl dimethylaminoethyl ether, N,N-dimethylaminoethylstyrene, tert-butoxystyrene, vinylpyridine, 1,2-divinylbenzene, 1,3-divinylbenzene and 1,4-divinylbenzene, and any mixture of two or more of these.

5. The rubber mixture as claimed in claim 4 , wherein the vinylaromatic compound is styrene.

6. The rubber mixture as claimed in claim 1 , wherein the filler is at least one silica and/or at least one carbon black.

7. The rubber mixture as claimed in claim 1 , wherein the rubber mixture contains 20 to 300 phr of said at least one filler.

8. The rubber mixture as claimed in claim 1 , wherein it contains 40 to 90 phr of the at least one polymer A and 10 to 60 phr of at least one further rubber.

9. The rubber mixture as claimed in claim 8 , wherein the at least one further rubber is a diene rubber selected from the group consisting of natural polyisoprene, synthetic polyisoprene, butadiene rubber and styrene-butadiene rubber.

10. A vulcanizate which is obtained by sulfur vulcanization of at least one rubber mixture as claimed in claim 1 .

11. A vehicle tire comprising at least one vulcanizate of at least one rubber mixture as claimed in claim 10 in at least one component.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Pruss Noa
• Grosse Julia
• Recker Carla
• Herzog Katharina

Classifications

• C08C19/00

  Chemical modification of rubber · CPC title

• B29B7/7495

  for mixing rubber · CPC title

• C08L19/00

  Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00 · CPC title

• B60C1/00 Primary

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08L15/00

  Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence) · CPC title