Rubber composition and tire
US-2017218170-A1 · Aug 3, 2017 · US
Cap tread rubber composition for cold weather tires
US10493801B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10493801-B2 |
| Application number | US-201715721054-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 29, 2017 |
| Priority date | Sep 30, 2016 |
| Publication date | Dec 3, 2019 |
| Grant date | Dec 3, 2019 |
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Abstract
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Provided are a cap tread rubber composition for cold weather tires enabling a balanced improvement in fuel economy, abrasion resistance, performance on ice/snow, and high-speed performance on snow-/ice-free cold roads, and a cold weather tire formed from the same. The rubber composition contains: a rubber component including BR, SBR, and NR and/or IR; and a filler, the composition having a combined amount of NR, IR, and BR of 80% by mass or more, an amount of BR of 30% by mass or more, and an amount of SBR of 0.3-10% by mass, each per 100% by mass of the rubber component, the filler including 60% by mass or more of silica per 100% by mass of the filler, the composition containing, per 100 parts by mass of the rubber component, 50 parts by mass or more of a fine particle silica having a N2SA of 190 m2/g or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cap tread rubber composition for cold weather tires, the cap tread rubber composition comprising: a rubber component including polybutadiene rubber, styrene butadiene rubber, and at least one of natural rubber or polyisoprene rubber; and a filler, the rubber composition having a combined amount of the natural rubber, the polyisoprene rubber, and the polybutadiene rubber of 80% by mass or more, an amount of the polybutadiene rubber of 30% by mass or more, and an amount of the styrene butadiene rubber of 0.3% to 10% by mass, each based on 100% by mass of the rubber component, the filler including 60% by mass or more of silica based on 100% by mass of the filler, the rubber composition comprising a fine particle silica having a nitrogen adsorption specific surface area of 190 m 2 /g or more in an amount of 50 parts by mass or more per 100 parts by mass of the rubber component. 2. The cap tread rubber composition for cold weather tires according to claim 1 , wherein the rubber composition has a combined amount of the natural rubber, the polyisoprene rubber, and the polybutadiene rubber of 90% by mass or more, and an amount of the styrene butadiene rubber of 0.3% to 5% by mass, each based on 100% by mass of the rubber component. 3. The cap tread rubber composition for cold weather tires according to claim 1 , wherein the rubber composition comprises the silica in an amount of 80 parts by mass or more per 100 parts by mass of the rubber component, and the fine particle silica has a nitrogen adsorption specific surface area of 210 m 2 /g or more. 4. The cap tread rubber composition for cold weather tires according to claim 1 , wherein the polybutadiene rubber has a cis content of 70% by mass or more. 5. The cap tread rubber composition for cold weather tires according to claim 1 , wherein the rubber composition comprises a plasticizer in an amount of 20 parts by mass or more per 100 parts by mass of the rubber component. 6. A cold weather tire comprising a cap tread produced using the rubber composition according to claim 1 .
Assignees
Inventors
Classifications
with cap and base layers · CPC title
containing two or more polymers of the same C08L -group · CPC title
Fillers, pigments or reinforcing additives · CPC title
Compositions of natural rubber · CPC title
Carbon · CPC title
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Frequently asked questions
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- What does patent US10493801B2 cover?
- Provided are a cap tread rubber composition for cold weather tires enabling a balanced improvement in fuel economy, abrasion resistance, performance on ice/snow, and high-speed performance on snow-/ice-free cold roads, and a cold weather tire formed from the same. The rubber composition contains: a rubber component including BR, SBR, and NR and/or IR; and a filler, the composition having a comb…
- Who is the assignee on this patent?
- Sumitomo Rubber Ind
- What technology area does this patent fall under?
- Primary CPC classification B60C1/0016. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 03 2019 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).