Tire tread rubber composition
US-10086652-B2 · Oct 2, 2018 · US
Rubber composition for tire tread
US10501608B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10501608-B2 |
| Application number | US-201515561971-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 26, 2015 |
| Priority date | Mar 26, 2015 |
| Publication date | Dec 10, 2019 |
| Grant date | Dec 10, 2019 |
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- Title
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Abstract
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Provided is a rubber composition for tire treads containing a diene rubber, from 1 to 20 parts by weight of a silica containing millable silicone rubber compound, and from 0.2 to 20 parts by weight of thermally expandable microcapsules, per 100 parts by weight of the diene rubber. A rubber hardness of the millable silicone rubber compound is from 10 to 50.
First claim
Opening claim text (preview).
The invention claimed is: 1. A rubber composition for a tire tread, wherein the rubber composition comprises: a diene rubber comprising natural rubbers and/or butadiene rubbers, from 1 to 20 parts by weight of a millable silicone rubber compound and from 0.2 to 20 parts by weight of a thermally expandable microcapsule having a structure in which a thermally expandable substance in encapsulated in a shell material formed from a thermoplastic resin, per 100 parts by weight of the diene rubber, the millable silicone rubber compound containing silica, and a rubber hardness of the millable silicone rubber compound being from 10 to 50. 2. The rubber composition for a tire tread according to claim 1 , wherein a weight ratio (X/Y) of a compounded amount (X) of the millable silicone rubber compound to a compounded amount (Y) of the thermally expandable microcapsule is from 20/80 to 90/10. 3. The rubber composition for a tire tread according to claim 1 , wherein the composition further comprises a peroxide-based cross-linking agent. 4. The rubber composition for a tire tread according to claim 1 , wherein the rubber hardness of the millable silicone rubber compound is from 5 to 40 lower than a rubber hardness of a base rubber excluding the millable silicone rubber compound and the thermally expandable microcapsule from the rubber composition. 5. A method of producing the rubber composition for a tire tread described in claim 1 , the method comprising: preparing a master batch by mixing the millable silicone rubber compound and the thermally expandable microcapsule in advance, and mixing the master batch and the diene rubber. 6. The method of producing the rubber composition for a tire tread according to claim 5 , wherein the master batch further contains a peroxide-based cross-linking agent. 7. A studless tire comprising a tread portion formed from the rubber composition for a tire tread described in claim 1 . 8. The rubber composition for a tire tread according to claim 2 , further comprising a peroxide-based cross-linking agent. 9. The rubber composition for a tire tread according to claim 8 , wherein the rubber hardness of the millable silicone rubber compound is from 5 to 40 lower than a rubber hardness of a base rubber excluding the millable silicone rubber compound and the thermally expandable microcapsule from the rubber composition. 10. A method of producing the rubber composition for a tire tread described in claim 9 , the method comprising: preparing a master batch by mixing the millable silicone rubber compound and the thermally expandable microcapsule in advance, and mixing the master batch and the diene rubber. 11. The method of producing the rubber composition for a tire tread according to claim 10 , wherein the master batch further contains a peroxide-based cross-linking agent. 12. A studless tire comprising a tread portion formed from the rubber composition for a tire tread described in claim 9 . 13. The rubber composition for a tire tread according to claim 1 , wherein the rubber composition is a studless tire tread rubber composition.
Assignees
Inventors
Classifications
Preparation or use of a blowing agent concentrate, i.e. masterbatch in a foamable composition · CPC title
using a polymer as a carrier · CPC title
Crosslinking before of after foaming · CPC title
characterized by the use of several polymeric components · CPC title
Polysiloxanes · CPC title
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Frequently asked questions
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- What does patent US10501608B2 cover?
- Provided is a rubber composition for tire treads containing a diene rubber, from 1 to 20 parts by weight of a silica containing millable silicone rubber compound, and from 0.2 to 20 parts by weight of thermally expandable microcapsules, per 100 parts by weight of the diene rubber. A rubber hardness of the millable silicone rubber compound is from 10 to 50.
- Who is the assignee on this patent?
- Yokohama Rubber Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08J9/32. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 10 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).