Preparation method of high reinforced white carbon black for rubber

A technology of silica and rubber, which is applied in the field of preparation of high-reinforcement silica for rubber, can solve the problems that silane coupling agents cannot modify silica, and achieve improved modification effect, low cost, and drying effect better effect

Inactive Publication Date: 2019-03-12
HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL
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  • Abstract
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Problems solved by technology

In addition, since the traditional silane coupling agent is not easily soluble in the silica slurry, which causes the silane coupling a...

Method used

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Experimental program
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Effect test

Embodiment 1

[0033] In the reactor, modifying agent hexamethyldisilazane (HMDS) and Si69 according to the mass ratio of 1:1 and ethylene glycol (modifying agent and ethylene glycol mass ratio are 1:1, and the modified The quality of agent is 2.0% of gained white carbon black slurry gross mass) joins in the water glass solution that 2.38mol / L modulus is 3.3, passes into water (the addition volume ratio of water, water glass is 43:52), in Heat up to 85°C at a rotating speed of 150r / min, then slowly add dilute sulfuric acid with a mass fraction of 20%, the reaction time is 90min, continue to feed dilute sulfuric acid, and carry out post-acidification treatment (the volume ratio of adding dilute sulfuric acid twice before and after is 6 : 1), control the pH of the reaction solution to be 4.5-5.0, age for 10min to obtain the aged slurry, wash the slurry generated by the reaction, cool, then pump the slurry into the filter press, and control the compaction pressure to 20MPa , and then pass the s...

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Abstract

The invention belongs to the technical field of white carbon black, and particularly relates to a preparation method of high reinforced white carbon black for rubber. According to the method, solid sodium silicate and water serve as raw materials, hexamethyl disilazane and Si69 serve as modifiers, and ethylene glycol is added and serves as an adjuvant to prepare the high reinforced white carbon black. Compared with a traditional white carbon black preparation method, the preparation method has the advantages that silicon hydroxyl on the surface of the white carbon black can be decreased, and liquid water-soluble alcohol is further added to promote modification of the modifiers. The silicon hydroxyl on the surface of the white carbon black prepared by the preparation method can be greatly decreased, compatibility of the white carbon black and rubber is improved, the processability of the rubber is improved, detection finds that mechanical performances such as wear resistance, tensile strength and stress at definite elongation of the rubber prepared from the modified white carbon black are improved, and the reinforcing property of the white carbon black is improved.

Description

technical field [0001] The invention belongs to the technical field of white carbon black production, and in particular relates to a preparation method of high-reinforcement white carbon black for rubber. Background technique [0002] Precipitated hydrated silica, also known as white carbon black, is a highly active reinforcing filler material, which is widely used in tires, rubber, paint, feed and many other fields because of its special surface structure and unique physical and chemical properties. For example, in the field of rubber, white carbon black is an important reinforcing agent, which can improve the strength of the rubber compound, reduce the hysteresis of the rubber compound, and reduce the rolling resistance of the tire. However, there are too many silanol groups on the surface of silica produced by ordinary precipitation method, which has a certain degree of hydrophilicity, resulting in low dispersion of silica and easy agglomeration, low reinforcing effect, a...

Claims

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Application Information

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IPC IPC(8): C08K3/36C08L21/00C08L9/04C08L9/06
CPCC08K3/36C08K9/04C08K9/06C08L21/00
Inventor 任立荣赵孝敏王文君胡明涛
Owner HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL
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