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Preparation method for rubber composite material

A composite material and rubber technology, applied in the field of material preparation, can solve problems such as poor compatibility and difficulty in dispersing

Inactive Publication Date: 2019-04-23
惠明伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of a large number of silanol groups on the surface of silica, the polarity is strong, and the compatibility with most hydrocarbon rubbers is poor. The high surface energy makes the agglomeration of silica particles serious, making it more difficult to disperse in rubber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] The preparation method of rubber composite material of the present invention, comprises the steps:

[0021] (1) Weigh the silica slurry, make a suspension with a mass fraction of 0.1, and place it on an electric stirrer to stir for pre-dispersion; Slowly add the ethanol solution of coupling agent Si69 dropwise in the medium, the addition amount is 3% of the quality of the silica; high-speed stirring makes the coupling agent Si69 and the silica suspension fully mixed uniformly to obtain an activated modified silica suspension;

[0022] (2) Prepare modified silica in the same way, and grind it in a colloid mill for 30 minutes;

[0023] (3) Use potassium hydroxide to adjust the pH value of the modified silica suspension or modified white carbon black dispersion system to about 9, then weigh the natural rubber latex into the dispersion system, stir and disperse with an electric stirrer for 2 hours;

[0024] (4) Coagulate with calcium chloride solution, crepe, granulate, an...

Embodiment 2

[0038] On the basis of embodiment one, the preparation method of rubber composite material of the present invention comprises the following steps:

[0039] (1) Weigh the silica slurry, make a suspension with a mass fraction of 0.1, and place it on an electric stirrer to stir for pre-dispersion; Slowly add the ethanol solution of coupling agent Si69 dropwise in the medium, and the addition amount is 4% of the silica mass; high-speed stirring makes the coupling agent Si69 and the silica suspension fully mixed uniformly to obtain an activated modified silica suspension;

[0040] (2) Prepare modified silica in the same way, and grind it in a colloid mill for 33 minutes;

[0041] (3) Use potassium hydroxide to adjust the pH value of the modified silica suspension or modified white carbon black dispersion system to about 9, then weigh the natural rubber latex into the dispersion system, stir and disperse with an electric stirrer for 2 hours;

[0042] (4) Coagulate with calcium chlo...

Embodiment 3

[0045] The preparation method of rubber composite material of the present invention, comprises the steps:

[0046] (1) Weigh the silica slurry, make a suspension with a mass fraction of 0.1, and place it on an electric stirrer to stir for pre-dispersion; Slowly add the ethanol solution of coupling agent Si69 dropwise, the addition is 5% of the quality of the silica; high-speed stirring makes the coupling agent Si69 and the silica suspension fully mixed evenly to obtain an activated modified silica suspension;

[0047] (2) Prepare modified silica in the same way, and grind it in a colloid mill for 35 minutes;

[0048] (3) Use potassium hydroxide to adjust the pH value of the modified silica suspension or the modified silica dispersion system to about 9, then weigh the natural rubber latex into the dispersion system, stir and disperse with an electric mixer for 2 hours;

[0049] (4) Coagulate with calcium chloride solution, crepe, granulate, and dry at 65°C for 48 hours to obta...

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PUM

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Abstract

The invention discloses a preparation method for a rubber composite material, and belongs to the field of the material preparation. The preparation method comprises the following steps: weighing silica slurry, preparing suspension, stirring and pre-dispersing; dropwise adding a coupling agent in a room temperature, and adding silica; stirring and enabling the coupling agent to be adequately and uniformly mixed with the silica suspension, preparing activation modified silica suspension; preparing white carbon black by the same method; adjusting a pH value of a modified silica suspension or modified white carbon black dispersion system, and weighing natural latex and adding to the dispersion system, stirring and dispersing by using an electric stirrer; co-coagulating by using calcium chloride solution, performing crepe, pelletizing to obtain a silica or white carbon black filled natural rubber master batch; and mixing the white carbon black / natural rubber master batch and the silica / natural rubber master batch according to a matching ratio. After the silica is added, a filler network of a white carbon black / silica filling rubber material is more uniform, and rolling resistance is reduced; hardness of vulcanized rubber is slightly reduced, stress at definite elongation, tensile strength, tear strength and elongation at break are increased, and physical properties are improved.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a rubber composite material. Background technique [0002] With the global resource crisis and people's increasing awareness of environmental protection, green tires are the future development direction of the automobile tire industry, which promotes the increasing use of white carbon black in tire tread rubber. Compared with carbon black, silica can reduce the rolling resistance of vulcanized rubber and reduce hysteresis loss, but there are also some problems. Due to the existence of a large number of silanol groups on the surface of silica, which has strong polarity and poor compatibility with most hydrocarbon rubbers, the high surface energy makes the aggregation of silica particles serious, making it more difficult to disperse in rubber. [0003] Silica is a new type of non-metallic mineral, which was first discovered and developed in Neuberger, Ger...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08K13/06C08K9/06C08K7/26C08K3/36C08K3/22C08K5/09C08J3/22B29C35/02
CPCC08J3/226B29C35/02C08J2307/02C08K3/36C08K5/09C08K7/26C08K9/06C08K13/06C08K2003/2296
Inventor 惠明伟
Owner 惠明伟
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