Rubber composition and pneumatic tire using same

一种橡胶组合物、化合物的技术，应用在特殊轮胎、轮胎零部件、运输和包装等方向，能够解决低燃料消耗性、加工性变差、tanδ变差等问题，达到提高分散性、低燃料消耗性的效果

Inactive Publication Date: 2017-05-10
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a polymer has a strong interaction between silica-polymer and polymer-polymer, and there is a problem that the viscosity of unvulcanized rubber increases and processability deteriorates.
[0004] Therefore, although the viscosity can be lowered by increasing the amount of softening agent such as processing oil, in this case, there are problems such as lowering of hardness, impairment of handling stability, and deterioration of tan δ (60°C) , the desired low fuel consumption cannot be obtained
However, in the prior art, sufficient dispersibility of silica cannot be obtained, and it is impossible to simultaneously improve hardness and low fuel consumption without reducing processability and hardness.

Method used

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  • Rubber composition and pneumatic tire using same
  • Rubber composition and pneumatic tire using same
  • Rubber composition and pneumatic tire using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0154] Hereinafter, the present invention will be further described using examples and comparative examples, but the present invention is not limited to the following examples.

[0155] Standard Example 1, Examples 1-2 and Comparative Examples 1-7

[0156] sample preparation

[0157] The components other than the vulcanization accelerator and sulfur in the formulation (parts by mass) shown in Table 1 were kneaded for 5 minutes with a 1.7-liter closed-type Banbury mixer, and then the kneaded product was discharged into the internal mixer In addition, mass cooling was performed, and a vulcanization accelerator and sulfur were added in the Banbury mixer to further knead to obtain a rubber composition. Next, press vulcanize the obtained rubber composition at 160°C for 20 minutes in a predetermined mold to obtain a vulcanized rubber test piece, and measure the physical properties of the unvulcanized rubber composition and the vulcanized rubber test piece by the test method shown b...

Embodiment 3～8 and comparative example 5～8

[0191] The above-mentioned example was repeated except that the compounding quantity of (D) monoglyceride of a fatty acid with respect to (B) silica was changed variously. The results are shown in Table 2. It should be noted that the results of the aforementioned standard example 1 are also collectively described in Table 2.

Embodiment 9～10 and comparative example 10

[0193] In the system to which the resin was added, the effect of the compounding of (D) monoglyceride of a fatty acid was examined. Otherwise, the above-mentioned examples were repeated. The results are combined and shown in Table 2.

[0194] [Table 2]

[0195]

[0196] *17: Resin (Terpene Styrene Resin TO-125 manufactured by Yasuhara Chemical Co., Ltd.)

[0197] From the results in Table 2, the compounding amount of (D) monoglyceride of fatty acid in Comparative Examples 5 and 7 was lower than the lower limit specified in the present invention, and thus no improvement effect of physical properties was confirmed.

[0198] On the other hand, in Examples 3 and 6, the compounding amount of (D) monoglycerides of fatty acids is within the range specified in the present invention. Therefore, the dispersibility of (B) silica, Improved processability and low fuel consumption. Examples 4, 5, 7, and 8 are examples in which the compounding amount of (D) monoglycerides of fatty aci...

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Abstract

The invention provides a rubber composition which achieves higher silica dispersibility without lowering workability and hardness, while having excellently low fuel consumption properties; and a pneumatic tire which uses this rubber composition. A rubber composition which is obtained by blending 5-200 parts by mass of (B) silica relative to 100 parts by mass of (A) a diene rubber, 1-20% by mass of (C) a silane coupling agent relative to the silica, and 1-20% by mass of (D) a glycerol mono-fatty acid ester relative to the mass of silica, said glycerol mono-fatty acid ester being derived from a fatty acid having 8-24 carbon atoms. With respect to this rubber composition, 10 parts by mass or more in 100 parts by mass of the component (A) has a heteroatom-containing functional group in the main chain and / or at an end.

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire using the same. pneumatic tires. Background technique [0002] In recent years, the method of compounding silica into tires has been known in response to the increasingly stringent demand for high performance tires. However, silica tends to aggregate due to the formation of hydrogen bonds due to silanol groups present on the surface of its particles, and it is generally difficult to improve its dispersibility. [0003] Therefore, a technique of introducing a functional group that interacts with silica into a polymer constituting the matrix of the rubber composition has been proposed. However, such a polymer has a strong interaction between silica-polymer and polymer-polymer, and there is a problem that the viscosity of unvulcanized rubber increases and processability deteriorates. [0004] Therefore, although the viscosity can be lowered by increasing the amount of softening ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00B60C1/00C08K3/36C08K5/103C08K5/54C08L9/00C08L25/02C08L45/00
CPCB60C1/00C08K3/36C08K5/103C08K5/54B60C1/0016C08L9/06C08L45/00C08K5/548
Inventor 筑岛新冈美幸芦浦诚
Owner THE YOKOHAMA RUBBER CO LTD
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