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Rubber composition and pneumatic tire using same
US12595319B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12595319-B2 |
| Application number | US-202318119087-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2023 |
| Priority date | Mar 28, 2022 |
| Publication date | Apr 7, 2026 |
| Grant date | Apr 7, 2026 |
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Abstract
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Provided is a rubber composition having excellent breaking strength. The rubber composition contains an inverse vulcanizate containing 10 mass % or more of carbon atoms and 30 mass % or more of sulfur atoms.
First claim
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What is claimed is: 1 . A rubber composition comprising: an inverse vulcanizate which is obtained by reacting limonene, dicyclopentadiene, and sulfur, wherein a content ratio of the carbon atoms in the inverse vulcanizate is 10 mass % or more, a content ratio of the sulfur atoms in the inverse vulcanizate is 30 mass % or more, and a content ratio (carbon atoms/sulfur atoms) of the carbon atoms to the sulfur atoms in the inverse vulcanizate is 31/66 to 40/56 in terms of mass ratio. 2 . A pneumatic tire produced using the rubber composition according to claim 1 . 3 . The rubber composition according to claim 1 , wherein a compounding ratio (limonene/sulfur) of the limonene to the sulfur is 0.1 to 2.5 in terms of mass ratio, a compounding ratio (dicyclopentadiene/limonene) of the dicyclopentadiene to the limonene is 0.01 to 1 in terms of mass ratio; and a compounding ratio (dicyclopentadiene/sulfur) of the dicyclopentadiene to the sulfur is 0.01 to 0.4 in terms of mass ratio. 4 . The rubber composition according to claim 1 , wherein the content ratio of the carbon atoms in the inverse vulcanizate is 31 to 40 mass %, and the content ratio of the sulfur atoms in the inverse vulcanizate is 56 to 66 mass %. 5 . A pneumatic tire produced using the rubber composition according to claim 3 . 6 . A pneumatic tire produced using the rubber composition according to claim 4 .
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- What does patent US12595319B2 cover?
- Provided is a rubber composition having excellent breaking strength. The rubber composition contains an inverse vulcanizate containing 10 mass % or more of carbon atoms and 30 mass % or more of sulfur atoms.
- Who is the assignee on this patent?
- Toyo Tire Corp
- What technology area does this patent fall under?
- Primary CPC classification B60C1/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 07 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).