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

12 Cites 6 Cited by

AI-Extracted 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 s...

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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.

Technology Topic

Silane couplingButadiene-styrene rubber +6

Examples

Experimental program(8)

Example Embodiment

[0052] Example 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 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℃; after 3~5min, add 1.0% coupling agent WD-50 of blending filler weight; when the temperature reaches 100℃, add blending filler weight 1.5 % Stearic acid, control the temperature at 98~102℃, and stir for 20min to prepare kaolin/silica modified filler.

[0055] The prepared No. 1 kaolin/silica modified filler was mixed according to the following formula: natural rubber, 20 parts; styrene butadiene rubber, 45 parts; butadiene rubber, 35 parts; industrial grade zinc oxide, 3 parts; industrial Grade stearic acid, 1 part; solid coumarone resin, 7 parts; accelerator M, 2.5 parts; accelerator D, 0.7 parts; accelerator CZ, 0.7 parts; accelerator TMTD, 0.15 parts; antioxidant 2246, 1 Parts; Kaolin/silica modified filler, 60 parts; Sulfur, 1 part; Mix the next piece, and leave it for 12 hours for vulcanization.

[0056] After the mixed rubber is sliced, it is vulcanized on a 0.25MN semi-automatic pressure forming machine. The vulcanization temperature is 145~150℃, the vulcanization time is 8min, and the vulcanization pressure is 15.5MPa. The vulcanized rubber is parked for 24 hours, sliced and sampled, and the mechanical properties are tested.

[0057] Use the National Standard of the People’s Republic of China "Determination of the Tensile Stress and Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 528-1998) and the National Standard of the People’s Republic of China "Determination of the Tear Strength of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 529- 1999), the People's Republic of China National Standard "Determination of Abrasion Resistance of Vulcanized Rubber" (GB/T 1689-1998) tests the physical and mechanical properties of composite materials. The specific indicators are:

[0058] Maximum load: 250.85N; tensile strength: 16.51MPa; 300% tensile stress: 3.78 MPa; breaking elongation: 867.72%; 1MPa constant stress elongation: 37.73%; breaking strength: 16.51MPa; tearing strength: 32.67KN/m; permanent deformation at break: 48.8%; Sauer A hardness: 59 degrees; abrasion: 0.27cm 3. Meet the national standard requirements for the physical and mechanical properties of construction machinery tire tread rubber (GB/T 1190-2009).

Example Embodiment

[0059] Example 2:

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

[0061] The specific modification process, conditions and steps: the same as in Example 1.

[0062] The prepared No. 2 kaolin/white carbon black modified filler was mixed according to the formula in Example 1. The next piece is mixed and vulcanized after being left for 12 hours.

[0063] After the mixed rubber is sliced, it is vulcanized on a 0.25MN semi-automatic pressure forming machine. The vulcanization temperature is 145~150℃, the vulcanization time is 8min, and the vulcanization pressure is 15.5MPa. The vulcanized rubber is parked for 24 hours, sliced and sampled, and the mechanical properties are tested.

[0064] Use the National Standard of the People’s Republic of China "Determination of the Tensile Stress and Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 528-1998) and the National Standard of the People’s Republic of China "Determination of the Tear Strength of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 529- 1999), the People's Republic of China National Standard "Determination of Abrasion Resistance of Vulcanized Rubber" (GB/T 1689-1998) tests the physical and mechanical properties of composite materials. The specific indicators are:

[0065] Maximum load: 246.67N; tensile strength: 16.78MPa; 300% tensile stress: 3.59 MPa; breaking elongation: 889.54%; 1MPa constant stress elongation: 44.26%; breaking strength: 14.78MPa; tearing strength: 30.69KN/m; permanent deformation at break: 44.8%; Sauer A hardness: 58 degrees; abrasion: 0.25cm 3. Meet the national standard requirements for the physical and mechanical properties of construction machinery tire tread rubber (GB/T 1190-2009).

Example Embodiment

[0066] Example 3:

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

[0068] The specific modification process, conditions and steps: the same as in Example 1.

[0069] The prepared No. 3 kaolin/white carbon black modified filler was mixed according to the formula in Example 1. The next piece is mixed and vulcanized after being left for 12 hours.

[0070] After the mixed rubber is sliced, it is vulcanized on a 0.25MN semi-automatic pressure forming machine. The vulcanization temperature is 145~150℃, the vulcanization time is 8min, and the vulcanization pressure is 15.5MPa. The vulcanized rubber is parked for 24 hours, sliced and sampled, and the mechanical properties are tested.

[0071] Use the National Standard of the People’s Republic of China "Determination of the Tensile Stress and Strain Properties of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 528-1998) and the National Standard of the People’s Republic of China "Determination of the Tear Strength of Vulcanized Rubber or Thermoplastic Rubber" (GB/T 529- 1999), the People's Republic of China National Standard "Determination of Abrasion Resistance of Vulcanized Rubber" (GB/T 1689-1998) tests the physical and mechanical properties of composite materials. The specific indicators are:

[0072] Maximum load: 224.13N; tensile strength: 15.11MPa; 300% tensile stress: 3.47 MPa; breaking elongation: 890.03%; 1MPa constant stress elongation: 39.8%; breaking strength: 13.64MPa; tearing strength: 31.67KN/m; permanent deformation at break: 50.0%; Sauer A hardness: 58 degrees; abrasion: 0.34cm 3. Meet the national standard requirements for the physical and mechanical properties of industrial vehicle pneumatic tire tread rubber (GB/T 2981-2001).

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PUM

Property	Measurement	Unit
Tensile strength	250.85	N
300% modulus stress	3.78 ~ 16.51	mPa
Breaking strength	16.51	mPa
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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