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Hard carbon black

A technology of hard carbon black and adsorption ratio, applied in the direction of fibrous fillers, etc., can solve the problems of lack of wear resistance and low heat generation, and achieve the effect of high wear resistance and excellent low heat generation

Active Publication Date: 2013-01-16
日铁碳株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The problem to be solved is that there is still not enough hard carbon black which maintains a high level of wear resistance and has very excellent low heat generation properties.

Method used

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Embodiment 1～3 and comparative example 1～4

[0067] After using a combustion chamber (900 mm in inner diameter, 2100 mm in length) having an air inlet for supplying combustion air from around a fuel burner installed in the axial direction of the furnace, it includes a reduced cone with a cone angle with a half angle of 15° , cylindrical straight tube portion (inner diameter 530mm, length 400mm), the first reaction chamber (inner diameter 370mm, length 3700mm) of the raw material supply port that can supply raw materials at right angles to the furnace axis, the second reaction chamber (inner diameter 254mm, 500mm in length), a third reaction chamber (900mm in length) with a cone angle of half angle 15°, and a reaction stopper (inner diameter 420mm) equipped with a plurality of reaction stop cooling water spraying devices (QWNo.1 to QWNo.8) . In addition, four raw material supply ports (FNo.1 to FNo.4) are provided in the first reaction chamber, one (FNo.5) is provided in the second reaction chamber, and three (FNo. .6~FN...

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PUM

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Abstract

The present invention provides hard carbon black having high scuff resistance and excellent low heat generation. The hard carbon black has selectivity characteristics of formula (1) and (2). Wherein, SF is a number average value of a shape factor calculated by formula (3), D50 is a 50% frequency value of a congeries, Dpa is a number average value of an equivalent weight round diameter calculated by a projected area of the congeries, and CTAB is CTAB adsorption ratio surface area. SF < -D50 +430 (1); Dpa < 0.2 * DBP - 0.2 * CTAB + 120 (2); SF = (girth) 2 / (projected area) * (1 / 4Pi) * 100 (3).

Description

technical field [0001] The present invention relates to hard carbon black having an excellent balance between abrasion resistance and low heat build-up. Background technique [0002] There are many kinds of carbon blacks for rubber compounding according to their uses and purposes, and they are classified according to various characteristics such as specific surface area and aggregates. [0003] Among them, carbon black for tire treads is required to achieve high wear resistance and low fuel consumption. Of these two desired properties, the latter low fuel consumption was evaluated as low heat generation. In particular, in tires for trucks and buses, since the load is greater than that of automobiles, the conditions for wear resistance are severe. As a result, high wear resistance and low fuel consumption under these severe conditions need to be combined. [0004] As a carbon black for satisfying these required performances, for example, it is effective to have a high aggre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/04C09C1/50
Inventor 栗原正树太田裕治吉永省三广濑伸洋牧野年宏
Owner 日铁碳株式会社