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A kind of preparation method of special hydrated silicon dioxide for engineering tire

A technology of hydrated silica and engineering tires, which is applied in the field of chemical manufacturing, can solve the problems of poor affinity between silica and rubber, insufficient reinforcement effect, unsatisfactory wear resistance and reinforcement effect, etc. Achieve good compatibility and high reinforcement effect

Active Publication Date: 2019-08-23
QUECHEN SILICON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear resistance and reinforcement effect of the rubber composition introduced with silica are still not satisfactory. The reason is that the affinity between silica and rubber is poor, which leads to insufficient reinforcement effect. full

Method used

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  • A kind of preparation method of special hydrated silicon dioxide for engineering tire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 1L of sodium silicate solution whose mass concentration is 0.1kg / L into the reactor, and add 2g of hydroquinone;

[0023] (2) Control the stirring speed to 400r / min and heat to 40℃;

[0024] (3) 0.8L of sulfuric acid solution with a mass concentration of 0.04kg / L was added to the reaction system at one time, and the reaction was allowed to stand for 30 minutes after 2 hours;

[0025] (4) add 1g sodium dodecyl sulfate to the reaction system;

[0026] (5) Under the same stirring speed as above, add dropwise a total of 0.4L of sulfuric acid solution with a mass concentration of 0.04kg / L into the reaction system, and the dropping speed is 0.5L / h, and react at 50°C for 5 hours;

[0027] (6) After the above reaction is completed, the temperature is raised to 90° C. for aging for 2 hours, washed, filtered and dried to obtain hydrated silica. Determination of specific surface area of ​​hydrated silica according to GB / T3073-1999 200.5m 2 / g.

Embodiment 2

[0029] (1) Add 1L of sodium silicate solution with a mass concentration of 0.2kg / L into the reactor, and add 6g of polyvinylpyrrolidone;

[0030] (2) Control the stirring speed to 500r / min and heat to 50℃;

[0031] (3) 1L of sulfuric acid solution with a mass concentration of 0.05kg / L was added to the reaction system at one time, and the reaction was allowed to stand for 30 minutes after 3 hours;

[0032] (4) add 4g sodium citrate to the reaction system;

[0033] (5) Under the same stirring speed as above, add dropwise a total of 0.6L of sulfuric acid solution with a mass concentration of 0.05kg / L into the reaction system, and the dropping rate is 0.5L / h, and react at 60°C for 5 hours;

[0034] (6) After the above reaction is completed, the temperature is raised to 95°C for aging for 2 hours, washed, filtered and dried to obtain hydrated silica. Determination of specific surface area of ​​hydrated silica according to GB / T3073-1999 205.3m 2 / g.

Embodiment 3

[0036] (1) Add 1L of sodium silicate solution whose mass concentration is 0.1kg / L into the reactor, and add 5g of hydroquinone;

[0037] (2) Control the stirring speed to 450r / min and heat to 45℃;

[0038] (3) 0.9L of sulfuric acid solution with a mass concentration of 0.04kg / L was added to the reaction system at one time, and the reaction was allowed to stand for 30 minutes after 2 hours;

[0039] (4) add 2g sodium p-toluenesulfonate to the reaction system;

[0040] (5) Under the same stirring speed as above, add dropwise a total of 0.5L of sulfuric acid solution with a mass concentration of 0.04kg / L into the reaction system, and the dropping speed is 0.5L / h, and react at 55°C for 5 hours;

[0041] (6) After the above reaction is completed, the temperature is raised to 95°C for aging for 2 hours, washed, filtered and dried to obtain hydrated silica. Determination of specific surface area of ​​hydrated silica according to GB / T3073-1999 203.9m 2 / g.

[0042] The hydrated si...

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Abstract

The invention discloses a preparation method of silicon dioxide hydrate special for an engineering tyre. The preparation method is characterized by comprising the following steps: (1) adding a sodium silicate solution of 0.1 to 0.2 kg / L into a reaction kettle, and adding a stabilizer; (2) controlling the stirring speed to be 400 to 500 r / min and heating to 40 to 50 DEG C; (3) adding a sulfuric acid solution of 0.04 to 0.05 kg / L into a reaction system at one time, reacting for 4 to 5 hours and leaving to stand for 2 hours; (4) adding a dispersing agent into a reaction system; (5) at the same stirring speed, adding a sulfuric acid solution of 0.04 to 0.05 kg / L into the reaction system dropwise, and reacting at 50 to 60 DEG C for 5 to 6 hours; and (6) after the reaction, heating to 90 to 95 DEG C, ageing for 2 hours, washing, performing filter pressing and drying to obtain the silicon dioxide hydrate. The silicon dioxide hydrate prepared by the method has high compatibility with rubber and good reinforcing effect.

Description

technical field [0001] The invention relates to the field of chemical manufacturing, in particular to a preparation method of hydrated silica specially used for engineering tires. Background technique [0002] In recent years, the transportation equipment used in engineering construction and mining production at home and abroad has become larger and larger, which leads to more stringent requirements on the carrying load and performance of construction machinery and its tires. [0003] Compared with ordinary tires, due to the heavy load of engineering vehicles, engineering tires need to have more excellent wear resistance, that is, the tire surface is not easy to wear. With the development of the industry, the requirements for the high performance of engineering tires are also increasing year by year, which requires the tire tread to have excellent wear resistance. [0004] On the other hand, since the 1990s, silica has been widely used in tire tread formulations as a reinfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C08K3/36
Inventor 王永庆
Owner QUECHEN SILICON CHEM