Rubber mixture and vehicle tires

Patent metadata

Field	Value
Publication number	US-10273351-B2
Application number	US-201715836401-A
Country	US
Kind code	B2
Filing date	Dec 8, 2017
Priority date	Jun 8, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Disclosed are sulfur-crosslinkable rubber mixtures that can be incorporated into treads of vehicle tires, and vehicle tires comprising the disclosed sulfur-crosslinkable rubber mixtures. The rubber mixtures comprise: at least one diene rubber, at least one silica, at least one hydrocarbon resin, and 1 to 40 phr of at least one liquid polybutadiene having terminal organosilicon modification and having a weight-average molecular weight Mw by GPC of 500 to 12 000 g/mol.

First claim

What is claimed is:

1. A sulfur-crosslinkable rubber mixture comprising:
at least one diene rubber,
at least one silica,
at least one hydrocarbon resin, and
1 to 40 phr of at least one liquid polybutadiene having terminal organosilicon modification and having a weight-average molecular weight Mw by GPC of 500 to 12 000 g/mol.

2. The rubber mixture according to claim 1 , wherein the at least one liquid polybutadiene is modified with at least one radical of formula I):
(R 1 R 2 R 3 )Si—  I)

wherein:
R 1 , R 2 , R 3 are the same or different and are selected from: linear or branched alkoxy, cycloalkoxy, alkyl, cycloalkyl, or aryl groups having 1 to 20 carbon atoms, the radical of formula I) is attached to the polymer chain of the at least one liquid polybutadiene directly or via a bridge, and
the bridge consists of a saturated or unsaturated carbon chain that optionally comprises cyclic aliphatic or aromatic elements and heteroatoms in or on the carbon chain.

3. The rubber mixture according to claim 2 , wherein the radical of formula I) is attached not directly but via a bridge of formula II):
(R 1 R 2 R 3 )Si—Y—X—  II)

wherein:
Y is an alkyl chain (—CH 2 ) n — with n=1 to 8, and
X is a functional group selected from the group consisting of: ester, ether, urethane, urea, amine, amide, thioether, and thioester.

4. The rubber mixture according to claim 3 , wherein the organosilicon-modified at least one liquid polybutadiene has a structure of formula III):

5. The rubber mixture according to claim 1 , wherein the at least one liquid polybutadiene with terminal organosilicon modification has a glass transition temperature T g by DSC of −85 to −30° C.

6. The rubber mixture according to claim 1 , wherein the at least one liquid polybutadiene having terminal organosilicon modification is present in the mixture in an amount of 2 to 17 phr.

7. The rubber mixture according to claim 1 , wherein the hydrocarbon resin has a softening point to ASTM E 28 of 60 to 99° C.

8. The rubber mixture according to claim 1 , wherein the hydrocarbon resin has a molecular weight Mw of 500 to 4000 g/mol and a Z-average molecular weight Mz of 2500 to 10 000 g/mol.

9. The rubber mixture according to claim 1 , wherein the hydrocarbon resin is an aliphatic C 5 resin and/or a hydrocarbon resin formed from alpha-methylstyrene and styrene.

10. A vehicle tire comprising at least one component comprising the sulfur-vulcanized rubber mixture according to claim 1 .

11. The vehicle tire according to claim 10 , where the at least one component is a tire tread.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Pavon Sierra Viktoria
• Mueller Norbert
• Sá Catarina
• Torbruegge Thorsten
• Vatterott Christoph
• Stark Anette

Classifications

• B60C1/0016

  Compositions of the tread · CPC title

• C08L2201/52

  Aqueous emulsion or latex, e.g. containing polymers of a glass transition temperature (Tg) below 20°C · CPC title

• C08L9/06 Primary

  Copolymers with styrene · CPC title

• C08L7/00

  Compositions of natural rubber · CPC title

• B29B7/7495 Primary

  for mixing rubber · CPC title