Claims
- 1. A silica-filled, sulfur-vulcanizable rubber composition comprising an unsaturated rubber, 20 to 100 phr of a silica, 1.6 to 8 phr of a silica coupling agent, 0.05 to 5 phr of an antidegradant, 0.1 to 5 phr of a vulcanization accelerator, 0.1 to 10 phr of sulfur, and 0.5 to 5 phr of a quinone diimine, with the proviso that the antidegradant is not a quinone diimine.
- 2. The composition of claim 1 wherein the composition comprises 0.5 to 3.5 phr of a quinone diimine.
- 3. The composition of claim 1 wherein the quinone diimine is selected from the group consisting of N-isopropyl-N′-phenyl-p-quinone diimine, N-(1,3-dimethylbutyl)-N′-phenyl-p-quinone diimine, N,N′-bis-(1,4-dimethylpentyl)-p-quinone diimine, N,N′-bis-(1-ethyl-3-methylpentyl)-p-quinone diimine, N,N′-diphenyl-p-quinone diimine, N,N′-ditolyl-p-quinone diimine, and N,N′-di-β-naphthyl-p-quinone diimine.
- 4. The composition of claim 1 wherein the antidegradant is a p-phenylenediamine.
- 5. The composition of claim 4 wherein the p-phenylenediamine is selected from the group consisting of N-isopropyl-N′-phenyl-p-phenylenediamine, N-(1,3-dimethyl-butyl)-N′-phenyl-p-phenylenediamine (6PPD), N,N′-bis-(1,4-dimethyl-pentyl)-p-phenylene-diamine, N,N′-bis-(1-ethyl-3-methylpentyl)-p-phenylenediamine, N,N′-diphenyl-p-phenylenediamine, N,N′-ditolyl-p-phenylenediamine, and N,N′-di-β-naphthyl-p-phenylenediamine.
- 6. The composition of claim 1 wherein the rubber is selected from the group consisting of stirene-butadiene rubber, butadiene rubber, natural rubber, isoprene rubber, and mixtures thereof.
- 7. The composition of claim 1 wherein the composition comprises 1.6 to 6 phr of a silica coupling agent.
- 8. The composition of claim 7 wherein the silica coupling agent is a silane coupling agent.
- 9. The composition of claim 1 wherein the composition comprises 40 to 100 phr of a silica.
- 10. A vulcanization process comprising mixing and heating the rubber composition of claim 1 at a temperature of 110-200° C. for a period of time of up to 12 hours.
- 11. An article of manufacture comprising the rubber vulcanizate obtained by the process of claim 10.
- 12. The article of manufacture of claim 11 comprising a pneumatic tire.
Priority Claims (1)
Number |
Date |
Country |
Kind |
00204661.3 |
Dec 2000 |
EP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority from U.S. Provisional Application No. 60/265,385, filed Jan. 30, 2001 and EP Application No. 00204661.3, filed Dec. 20, 2000, the entire contents of which are incorporated by reference herein.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60265385 |
Jan 2001 |
US |