Sulfur-crosslinkable rubber mixture, vulcanizate of the rubber mixture, and vehicle tire

Patent metadata

Field	Value
Publication number	US-11952494-B2
Application number	US-201816652112-A
Country	US
Kind code	B2
Filing date	Jul 23, 2018
Priority date	Oct 10, 2017
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

The invention relates to a sulfur-crosslinkable rubber mixture, to the vulcanizate thereof, and to a vehicle tire. The rubber mixture according to the invention comprises at least the following constituents: at least one diene rubber; and, at least one char (HTC char) obtained by hydrothermal carbonization of at least one starting substance. A vehicle tire according to the invention comprises at least one vulcanizate according to the invention of the rubber mixture in at least one component.

First claim

The invention claimed is:

1. A sulfur-crosslinkable rubber mixture comprising:
at least one diene rubber, and
at least one hydrothermal carbonized coal produced by hydrothermal carbonization of at least one starting substance,
wherein the at least one hydrothermal carbonized coal has a BET nitrogen surface area according to DIN ISO 9277 of 20 to 200 m 2 /g;
wherein the at least one hydrothermal carbonized coal is unactivated hydrothermal carbonized coal;
wherein the hydrothermal carbonization is carried out at a temperature of 150° C. to 300° C. and a pressure of 2 bar to 20 bar;
wherein the at least one hydrothermal carbonized coal has a surface functionality;
wherein the sulfur-crosslinkable rubber mixture is free from silane coupling agents; and
wherein at least one metal halide is used in the hydrothermal carbonization.

2. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one metal halide is at least one metal chloride.

3. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one starting substance is a degradation product of at least one biomass.

4. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one starting substance is two starting substances comprising a biomass and a degradation product of the biomass.

5. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one starting substance is selected from the group consisting of lignin, cellulose, hemicellulose and sugar.

6. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one starting substance is glucose.

7. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the sulfur-crosslinkable rubber mixture further comprises 5 to 100 phr of the at least one hydrothermal carbonized coal.

8. The sulfur-crosslinkable rubber mixture according to claim 1 , which is incorporated in at least one of side wall, horn profile and inner component of a vehicle, and subjected to sulfur vulcanization.

9. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the surface functionality is functional groups at the surface of the at least one hydrothermal carbonized coal, and the functional groups are carbon-oxygen-containing functional groups, nitrogen, sulfur, and/or halides.

10. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the hydrothermal carbonization is carried out at a temperature of 210° C. to 230° C.

11. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein a weight ratio of the at least one metal halide to starting substance is 0.3:1 to 3.0:1.

12. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the sulfur-crosslinkable rubber mixture is devoid of any further reinforcing filler.

13. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one metal halide is at least ZnCl 2 .

14. The sulfur-crosslinkable rubber mixture according to claim 13 , further comprising a salt selected from the group consisting of LiCl, NaCl and KCl.

15. The sulfur-crosslinkable rubber mixture according to claim 1 , wherein the at least one starting substance is at least one biomass.

16. The sulfur-crosslinkable rubber mixture according to claim 15 , wherein the biomass is selected from the group consisting of cereal husks, nut husks, fruit peels, green waste, wood waste, sawdust, and algae.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Hojdis Nils
• Recker Carla
• Wark Michael
• Multhaupt Hendrik

Classifications

• C08L9/00 Primary

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

• B60C1/0025

  Compositions of the sidewalls · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08K3/04 Primary

  Carbon · CPC title

• C08K3/36

  Silica · CPC title