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Method for preparing blend composite material by virtue of performing blending modification on kaolin/white carbon black

A composite material and silica technology, which is used in the deep processing, application and composite material fields of non-metallic minerals, can solve the problems of high processing cost and insufficient comprehensive performance of silica filling alone, and is beneficial to industrial application and solves comprehensive problems. The effect of insufficient performance and low energy consumption

Inactive Publication Date: 2013-03-20
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kaolin / white carbon black blended modified filling not only better solves the problem of insufficient comprehensive performance of kaolin filling alone, but also better solves the problem of high processing cost of white carbon black filling alone; compared with single rubber filling, natural rubber, The combined use of styrene-butadiene rubber and butadiene rubber can reduce the processing cost and improve the overall performance of the composite material, meeting the requirements of high-performance application standards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The No. 1 kaolin sample used in Example 1 comes from Maoming, Guangdong. The particle size characteristics of the kaolin sample: -2μm content 60.07%, -5μm content 96.79%, -10μm content 99.96%.

[0054] The specific modification process, conditions and steps are as follows: put the No. 1 kaolin sample and white carbon black in a high-speed mixer at a weight ratio of 3:2, heat and stir, and when the temperature reaches 90°C, add the weight of the blended filler 0.5% coupling agent WD-81, control the temperature at 88~92°C; add 1.0% of the weight of the blended filler WD-50 after 3~5 minutes; when the temperature reaches 100°C, add the blended filler weight 1.5 % stearic acid, control the temperature at 98~102°C, and stir for 20 minutes to prepare kaolin / silica modified filler.

[0055] The prepared No. 1 kaolin / white carbon black modified filler is mixed according to the following formula: natural rubber, 20 parts; styrene-butadiene rubber, 45 parts; butadiene rubber, 35...

Embodiment 2

[0060] The No. 2 kaolin sample used in Example 2 comes from Maoming, Guangdong. The particle size characteristics of the kaolin sample: -2μm content 49.12%, -5μm content 90.49%, -10μm content 98.73%.

[0061] Concrete modification technique, condition and step: with embodiment 1.

[0062] The prepared No. 2 kaolin / silica modified filler was mixed according to the formula in Example 1. Mix the next sheet, park it for 12 hours and vulcanize it.

[0063] After slicing, the compound rubber was vulcanized on a 0.25 MN semi-automatic pressure molding machine. The vulcanization temperature was 145-150°C, the vulcanization time was 8 minutes, and the vulcanization pressure was 15.5 MPa.

[0064] Using the National Standard of the People's Republic of China "Determination of Tensile Stress-Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" (GB / T 528-1998), the National Standard of the People's Republic of China "Determination of Tear Strength of Vulcanized Rubber or Ther...

Embodiment 3

[0067] The No. 3 kaolin sample used in Example 3 is Guangxi Beihai exfoliated kaolin. The particle size characteristics of the kaolin sample: -2μm content 36.94%, -5μm content 79.67%, -10μm content 95.07%.

[0068] Concrete modification technique, condition and step: with embodiment 1.

[0069] The prepared No. 3 kaolin / silica modified filler was mixed according to the formula in Example 1. Mix the next sheet, park it for 12 hours and vulcanize it.

[0070] After slicing, the compound rubber was vulcanized on a 0.25 MN semi-automatic pressure molding machine. The vulcanization temperature was 145-150°C, the vulcanization time was 8 minutes, and the vulcanization pressure was 15.5 MPa.

[0071] Using the National Standard of the People's Republic of China "Determination of Tensile Stress-Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" (GB / T 528-1998), the National Standard of the People's Republic of China "Determination of Tear Strength of Vulcanized Rubber o...

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Abstract

The invention relates to a method for preparing blend composite material by virtue of performing blending modification on kaolin / white carbon black. The method provided by the invention comprises the following steps of: placing kaolin and white carbon black into a high speed mixer, heating and stirring until temperature is 90 DEG C, sequentially adding two silane coupling agents, adding an auxiliary modifier at the temperature of 100 DEG C, stirring for 20 minutes to prepare a modified filler, filling the modified filler into blend of natural rubber, butadiene styrene rubber and butadiene rubber, wherein the mechanical properties of the prepared composite material meet requirements in the national standard for tread rubber of an off-the-road tyre or other tyres. According to the method provided by the invention, two fillers are filled in a blending modification manner, and the problems that comprehensive performance is poor when the kaolin is independently filled and the processing cost is high when the white carbon black is independently filled; the blend is adopted, so that the processing cost can be reduced while the comprehensive performance of the composite material can be improved; and the modification process and the medicament system are simple, a matched sulphurization formula is provided, the applicability is wide, and the production cost is low, so that the method provided by the invention is convenient for industrial production and application.

Description

technical field [0001] The invention relates to the deep processing, application and composite material technology of non-metallic ore, in particular to the modification of kaolin / white carbon black blend filler and its application in compound materials with glue. Background technique [0002] Nano-scale carbon black and white carbon black are traditional reinforcing fillers in the rubber industry, but the production of carbon black mainly comes from petroleum, which has high production costs and environmental protection problems. The production cost of white carbon black is high no matter it is produced by vapor phase method or precipitation method. Using kaolin from a wide range of sources and low price to partially replace carbon black and white carbon black as a reinforcing filler can not only reduce the production cost of composite materials, but also can It plays a reinforcing role. Therefore, using modified kaolin to partially replace carbon black and white carbon bla...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L7/00C08L9/00C08K13/06C08K9/06C08K9/04C08K3/36C08K3/34C08K3/22C08K3/06
Inventor 管俊芳陈阳曾伟能胡雪峰高惠民张凌燕王志国
Owner WUHAN UNIV OF TECH
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