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Natural rubber masterbatch and method for production thereof

A technology of natural rubber latex and natural rubber, which is applied in the direction of transportation and packaging, special tires, tire parts, etc., can solve the problems of high heat generation, deterioration of carbon black dispersion, lack of wear resistance, etc., and achieve improvement Effect of abrasion resistance and low heat generation

Active Publication Date: 2007-12-05
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Considering that it is suitable for heavy-duty tires under bad road conditions, and attempting to lower the structure of the carbon black to be mixed and sharpen the distribution of aggregates, there is a disadvantage that all of these will cause deterioration of the dispersibility of carbon black in rubber , not only cannot obtain sufficient wear resistance, but also cause high heat generation

Method used

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  • Natural rubber masterbatch and method for production thereof
  • Natural rubber masterbatch and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] Hereinafter, the present invention will be described based on examples.

[0070] Various measurements of the respective Examples and Comparative Examples were performed as follows.

[0071] (1) Wear resistance test

[0072] Each test rubber composition was used for a tire tread, and various tires of size 1000R2014PR were manufactured, and the tires were driven for 6000 km in rough road conditions.

[0073] Abrasion resistance index=(running distance / wear amount of the test tire for the test) / (running distance / wear amount of the tire of Comparative Example 3)

[0074] The larger the value, the better the abrasion resistance.

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Abstract

The present invention provides a natural rubber masterbatch, a method for producing the same, a natural rubber composition using the masterbatch, and a tire. The natural rubber masterbatch can provide a tread rubber composition with significantly improved wear resistance, which It is especially suitable for heavy-duty tires in bad road conditions without compromising low heat generation. In the mixing process of mixing the natural rubber latex with a slurry solution obtained by dispersing carbon black in water in advance, 10 to 100 parts by weight of carbon black is mixed with respect to 100 parts by weight of the natural rubber component in the natural rubber latex. Black satisfies the following relationship: (1) N2SA is 120-180m2 / g; (2) the relationship between 24M4DBP and N2SA is expressed as 15≤24M4DBP-0.375N2SA≤38; (3) Dst of carbon black aggregates is expressed as Dst≤65nm, And the ratio of ΔD50 to Dst (ΔD50 / Dst) of the carbon black aggregate is expressed as ΔD50 / Dst≤0.70.

Description

technical field [0001] The present invention relates to a natural rubber masterbatch and a manufacturing method thereof, in detail, to a natural rubber masterbatch and a manufacturing method thereof. The natural rubber masterbatch can provide a rubber composition for treads with significantly improved wear resistance performance. , which is suitable for heavy-duty tires in bad road conditions without damaging the low heat generation properties of the tires, and further relates to a rubber composition and tires using the natural rubber masterbatch, especially heavy-duty tires in bad road conditions. Background technique [0002] At present, as a reinforcing filler for rubbers such as tires, carbon black is often used. This is because carbon black can impart high reinforcement and excellent wear resistance compared to other filler materials. In addition, it is known that the low structuring of carbon black can improve the abrasion resistance and tear resistance, especially fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08K3/04C08J3/22
CPCC08J3/226B60C1/0016C08C1/04C08J3/215C08J2307/02C08J2321/00C08J2407/00C08K3/04C08L7/02
Inventor 山田浩柳泽和宏
Owner BRIDGESTONE CORP
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