Rubber composition and pneumatic tire
A rubber composition and rubber technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of reduced wear resistance and unsatisfactory friction on ice, and achieve friction on ice excellent effect
Active Publication Date: 2015-02-18
THE YOKOHAMA RUBBER CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] This technology utilizes the irregularities formed on the surface of the tread portion to discharge the water film formed on the ice surface at high temperature, and to improve the friction on ice by scraping the surface of ice at low temperature, but the ice in the prior art The upper friction force is not yet satisfactory, and further improvement is desired because it causes a decrease in wear resistance
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1～8 and comparative example 1～7
[0109] The components shown in Table 1 below were mixed in the ratio (parts by mass) shown in Table 1 below.
[0110] Specifically, first, the ingredients shown in the following Table 1 except for sulfur and the vulcanization accelerator were kneaded for 5 minutes in a 2-liter internal mixer, and released when the temperature reached 150°C to obtain a masterbatch .
[0111] Next, sulfur and a vulcanization accelerator were mixed into the obtained master batch using an open roll to obtain a rubber composition.
[0112] Next, the obtained rubber composition was vulcanized at 170° C. for 15 minutes in a Lamborn wear mold (disc shape with a diameter of 63.5 mm and a thickness of 5 mm) to produce a vulcanized rubber sheet.
[0113]
[0114] Attach the vulcanized rubber sheet prepared above to the flat cylindrical base rubber, and use an inside drum type ice friction tester to measure temperature: -1.5°C, load: 5.5kg / cm 3 1. Drum rotation speed: the coefficient of friction on ic...
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Abstract
The purpose of the present invention is to provide a rubber composition with which it is possible to produce a tire that retains wear resistance and has excellent frictional force on ice, and a pneumatic tire using the rubber composition. The rubber composition of the present invention is a rubber composition comprising a diene rubber, carbon black and / or a white filler, and a master batch prepared by premixing a non-diene rubber and an organic peroxide, wherein a total content of carbon black and white filler is from 20 to 70 parts by mass per 100 parts by mass of diene rubber and a content of the non-diene rubber in the master batch is from 3 to 30 parts by mass per 100 parts by mass of the diene rubber.
Description
technical field [0001] The present invention relates to a rubber composition and a pneumatic tire. Background technique [0002] As one of the methods for improving the frictional force on ice of studless tires, there is known a technique of forming concavities and convexities on the surface of the tread portion by blending fine substances into the rubber material (for example, refer to Patent Document 1 ~3.). [0003] This technology utilizes the irregularities formed on the surface of the tread portion to discharge the water film formed on the ice surface at high temperature, and to improve the friction on ice by scraping the surface of ice at low temperature, but the ice in the prior art The upper frictional force is not yet sufficiently satisfactory, and furthermore, since it causes a decrease in wear resistance, further improvement is desired. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Application Laid-Open No...
Claims
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IPC IPC(8): C08L9/00B60C1/00C08J3/22C08K3/04C08K5/14
CPCC08L7/00C08K5/12C08L9/00B60C1/0016C08K5/0016C08K5/14C08L9/06C08K3/04C08L23/16C08L23/286C08L23/22C08L23/283C08L21/00
Inventor 三原谕清水克典前岛圭介赤堀弥生
Owner THE YOKOHAMA RUBBER CO LTD