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Rubber composition and use thereof

A rubber composition and rubber technology, which is applied in the field of automobile tires and rubber shock-absorbing materials, can solve the problems of high cross-linking density and poor tensile elongation at break, etc.

Inactive Publication Date: 2003-01-01
MITSUI CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the prior art, when trying to balance the dynamic properties of ethylene-α-olefin with 3-12 carbon atoms-non-conjugated polyolefin copolymer rubber for diene-type rubbers such as NR, the crosslink density became too high , resulting in deterioration of mechanical properties such as tensile elongation at break; thus it is impossible to make dynamic properties compatible with physical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0099] Except for using polysiloxane-2 instead of polysiloxane-1, vulcanized rubber moldings were prepared by the same formulation and molding conditions as in Example 1, and their physical properties were evaluated. The results are shown in Table 3. The usage-amount of the said polysiloxane is 0.89 mol with respect to 1 mol of the said alkoxysilane compound. (Example 3)

Embodiment 3

[0100] Except for changing the formulation amount of polysiloxane-1 to 6 parts by weight, vulcanized rubber moldings were prepared by the same formulation and molding conditions as in Example 1, and their physical properties were evaluated. The results are shown in Table 3. The usage-amount of the said polysiloxane was 0.66 mol with respect to 1 mol of the said alkoxysilane compound. (Example 4)

Embodiment 4

[0101] Except for changing the formulation amount of the alkoxysilane compound to 2.25 parts by weight, vulcanized rubber moldings were prepared by the same formulation and molding conditions as in Example 1, and their physical properties were evaluated. The results are shown in Table 3. The alkoxysilyl weight of the above-mentioned alkoxysilane compound is 1.1×10 per square meter of the specific surface area of ​​the above-mentioned fine powder silicic acid. -5 Moore. The usage-amount of the said polysiloxane is 0.23 mol with respect to 1 mol of the said alkoxysilane compound. (comparative example 4)

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PUM

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Abstract

This invention relates to a rubber composition comprising an ethylene-alpha-olefin having 3 to 12 carbon atoms-non-conjugated polyene copolymer rubber, a specific alkoxysilane compound, a specific polysiloxane and a specific fine-powdered silicic acid and / or silicate, to vulcanizing method of the rubber composition, and to a rubber product obtainable by the vulcanizing method.

Description

field of invention [0001] The present invention relates to a rubber composition containing ethylene-α-olefin having 3 to 12 carbon atoms-non-conjugated polyolefin copolymer rubber, which is excellent in dynamic characteristics, that is, it has a low dielectric loss angle Tangent δ (tanδ), and is also excellent in heat resistance and fatigue resistance, it is suitable for automobile tires and rubber shock-absorbing materials. Background technique [0002] Diene-type rubbers, such as natural rubber (NR), styrene-butadiene rubber (SBS) and butadiene rubber (BR), are considered to be excellent rubbers in terms of dynamic fatigue resistance and dynamic characteristics, and it is It is used as raw material rubber in automobile tires and rubber shock-absorbing materials. However, in recent years, the environment in which rubber products are used has changed greatly, and improvements in heat resistance and weather resistance of rubber products have been demanded. [0003] In the c...

Claims

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Application Information

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IPC IPC(8): C08K5/5419C08L23/16C08L83/00C08L83/04
CPCC08L83/00C08G77/02C08G77/70C08K5/5419C08L23/16C08G77/18C08G77/20C08L83/04C08L2666/04C08L2666/54
Inventor 松永慎也仲滨秀齐川崎雅昭石川和宪
Owner MITSUI CHEM INC
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