Rubber composition and pneumatic-tyre using the rubber composition
A technology of rubber composition and pneumatic tires, which is applied in the direction of pneumatic tires, reinforcement layers of pneumatic tires, special tires, etc., and can solve the problems of inability to obtain rigidity, heat generation and changes in physical properties, etc.
Inactive Publication Date: 2004-08-04
SUMITOMO RUBBER IND LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Such rubber formulations include: for example, a rubber composition in which a phenolic resin and a methylene group-imparting compound have been developed (refer to Patent No. 3135650), but it is still not possible to obtain Good balance of rigidity, heat generation and physical property changes like a rubber composition of a diphenol resin and a methylene group-imparting compound
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-24 and comparative example 1-7
[0040] (Production method)
[0041] The basic formula shown in Table 2 and the formula shown in Table 3-5 to remove sulfur and vulcanization accelerator were mixed with a Banbury mixer at about 150°C for 5 minutes. Subsequently, sulfur and a vulcanization accelerator were added to the obtained rubber composition, and kneaded at about 80°C for 5 minutes using a biaxial kneader.
[0042] The obtained rubber composition for film was molded and vulcanized under the conditions of 150° C., 30 minutes, and 20 kgf to produce 11R22.5 automobile tires.
[0043] Basic formula
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Abstract
The present invention provides a rubber composition in which increase in elastic modulus due to thermal fatigue is small, change in properties over time is prevented, durability is significantly improved, and the pneumatic tire has a strip which includes the rubber composition. More specifically, the present invention provides a rubber composition which includes 100 parts by weight of (A) a rubber component which includes natural rubber and / or isoprene rubber, 4 to 6 parts by weight of (B) sulfur, 0.5 to 2.0 parts by weight of (C) a resin containing resorcin or a derivative thereof, 0.5 to 2.0 parts by weight of (D) a compound capable of donating a methylene group, and (E) a cobalt metallic salt. The present invention also provides a pneumatic tire having a strip with the above-described rubber composition, which is located on a breaker edge.
Description
Technical field [0001] The present invention relates to a rubber composition and a pneumatic tire; specifically, the present invention relates to a rubber composition for a film having excellent durability, and a pneumatic tire containing a film composed of the rubber composition in the bund edge portion. Background technique [0002] In recent years, people have a strong demand for extending the life of tires, so the wear resistance of tread rubber has been continuously improved, and the width of tire treads has also been continuously expanded. Along with this, the heat generation of tires has increased, causing various problems. In particular, with the curing of the bundling edge rubber, the rubber and steel cords peel off at the bundling edge, and the breaking elongation performance of the bundling edge rubber is reduced, thereby destroying the bundling edge rubber and easily causing tire burst. [0003] In the existing rubber formulations for bund...
Claims
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IPC IPC(8): B60C1/00C08K3/04C08K3/06C08K5/00C08K5/098C08K5/3477C08L7/00C08L9/00C08L21/00C08L61/12
CPCC08L7/00C08K5/098C08L61/12C08L21/00C08K5/3477B60C1/00B60C2009/1864C08L2666/16
Inventor 水野洋一大槻洋敏平山道夫石田博一
Owner SUMITOMO RUBBER IND LTD