Sulfur-crosslinkable rubber mixture and vehicle tire

Patent metadata

Field	Value
Publication number	US-10214635-B2
Application number	US-201515310862-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	May 15, 2014
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

The invention relates to a sulfur-crosslinkable rubber mixture, in particular for treads of vehicle tires, and to a vehicle tire. The rubber mixture contains at least the following components: at least one diene rubber and 10 to 200 phr of at least one silicic acid and 2 to 20 phf of at least one silane having general empirical formula I) [(R1)3Si—X]mSn(R2)2-m, wherein the residues R1 within a molecule can be the same or different and are alkoxy groups having 1 to 10 carbon atoms or cyclic dialkoxy groups having 2 to 10 carbon atoms or cycloalkoxy groups having 4 to 10 carbon atoms or phenoxy groups or aryl groups having 6 to 20 carbon atoms or alkyl groups having 1 to 10 carbon atoms or alkenyl groups having 2 to 20 carbon atoms or aralkyl groups having 7 to 20 carbon atoms or halides and wherein X is a polar organic group containing urea and wherein m assumes the value 1 or 2 and wherein n is an integer from 1 to 8 and wherein R2 is a hydrogen atom or an acyl group having 1 to 20 carbon atoms.

First claim

The invention claimed is:

1. A sulfur-crosslinkable rubber mixture comprising:
at least one diene rubber;
10 to 200 phr of at least one silica; and,
2 to 20 phf of at least one silane having the general empirical formula:
[(R 1 ) 3 Si—X] m S n (R 2 ) 2-m

wherein the R 1 radicals may be the same or different within one molecule, wherein the R 1 radicals selected from the group consisting of alkoxy groups having 1 to 10 carbon atoms, cyclic dialkoxy groups having 2 to 10 carbon atoms, cycloalkoxy groups having 4 to 10 carbon atoms or phenoxy groups, aryl groups having 6 to 20 carbon atoms, alkyl groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, aralkyl groups having 7 to 20 carbon atoms, and halides, wherein X is a polar organic urea-containing group, wherein m assumes the value of 1 or 2, wherein n is an integer from 1 to 8, and wherein R 2 is a hydrogen atom or an acyl group having 1 to 20 carbon atoms; and,
wherein the polar organic urea-containing X group comprises at least one urea derivative as polar functionality which bears an organic hydrocarbyl group on the two nitrogen atoms, wherein the group between the first nitrogen atom of the urea-containing group and the sulfur of the S n group is aliphatic, and wherein the group between the second nitrogen atom of the urea-containing group and the silicon atom of the (R 1 ) 3 Si group is aliphatic or aromatic.

2. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the polar organic urea-containing X group comprises at least one urea derivative as polar functionality which bears an organic hydrocarbyl group on the two nitrogen atoms, wherein the group between the first nitrogen atom of the urea-containing group and the sulfur of the S n group is aliphatic, and wherein the group between the second nitrogen atom of the urea-containing group and the silicon atom of the (R 1 ) 3 Si group is aliphatic.

3. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the polar organic urea-containing X group is a 1-ethyl-3-propylurea radical.

4. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the silane has the following structure:

5. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein n=1, X=1-ethyl-3-propylurea radical, m=2 and R 1 =EtO.

6. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein n=4, X=1-ethyl-3-propylurea radical, m=2 and R 1 =EtO.

7. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein n=1, X=1-ethyl-3-propylurea radical, m=1, R 1 =EtO and R 2 ═H.

8. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein n=1, X=1-ethyl-3-propylurea radical, m=1, R 1 =EtO and R 2 =acetyl.

9. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the mixture comprises 5 to 40 phr of at least one natural polyisoprene and at least one synthetic polyisoprene, and 25 to 85 phr of at least one styrene-butadiene rubber.

10. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the mixture comprises 5 to 40 phr of at least one natural polyisoprene or at least one synthetic polyisoprene, and 25 to 85 phr of at least one styrene-butadiene rubber.

11. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the mixture comprises 5 to 30 phr of at least one natural polyisoprene and at least one synthetic polyisoprene, 25 to 80 phr of at least one styrene-butadiene rubber, and 5 to 50 phr of at least one butadiene rubber.

12. The sulfur-crosslinkable rubber mixture as claimed in claim 1 , wherein the mixture comprises 5 to 30 phr of at least one natural polyisoprene or at least one synthetic polyisoprene, 25 to 80 phr of at least one styrene-butadiene rubber, and 5 to 50 phr of at least one butadiene rubber.

13. A vehicle tire comprising a sulfur-crosslinkable rubber mixture, the mixture comprising:
at least one diene rubber;
10 to 200 phr of at least one silica; and,
2 to 20 phf of at least one silane having the general empirical formula:
[(R 1 ) 3 Si—X] m S n (R 2 ) 2-m

wherein the R 1 radicals may be the same or different within one molecule, wherein the R 1 radicals selected from the group consisting of alkoxy groups having 1 to 10 carbon atoms, cyclic dialkoxy groups having 2 to 10 carbon atoms, cycloalkoxy groups having 4 to 10 carbon atoms or phenoxy groups, aryl groups having 6 to 20 carbon atoms, alkyl groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, aralkyl groups having 7 to 20 carbon atoms, and halides, wherein X is a polar organic urea-containing group, wherein m assumes the value of 1 or 2, wherein n is an integer from 1 to 8, and wherein R 2 is a hydrogen atom or an acyl group having 1 to 20 carbon atoms; and,
wherein the polar organic urea-containing X group comprises at least one urea derivative as polar functionality which bears an organic hydrocarbyl group on the two nitrogen atoms, wherein the group between the first nitrogen atom of the urea-containing group and the sulfur of the S n group is aliphatic, and wherein the group between the second nitrogen atom of the urea-containing group and the silicon atom of the (R 1 ) 3 Si group is aliphatic or aromatic.

14. The vehicle tire as claimed in claim 13 , wherein the mixture is a component of a tread of the vehicle tire.

15. The vehicle tire as claimed in claim 13 , wherein the polar organic urea-containing X group comprises at least one urea derivative as polar functionality which bears an organic hydrocarbyl group on the two nitrogen atoms, wherein the group between the first nitrogen atom of the urea-containing group and the sulfur of the S n group is aliphatic, and wherein the group between the second nitrogen atom of the urea-containing group and the silicon atom of the (R 1 ) 3 Si group is aliphatic.

16. The vehicle tire as claimed in claim 13 , wherein the silane has the following structure:

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Schwekendiek Kirsten
• MüLLER NORBERT
• Recker Carla
• Schoeffel Julia

Classifications

• B60C1/00

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

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L9/00 Primary

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

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title