Nano silicon dioxide for rubber reinforcement and preparation method thereof

A nano-silicon dioxide and carbon dioxide technology, applied in the field of rubber reinforcing additives and rubber additives, can solve the problems of solid materials unable to pass through microchannels, continuous production, and low gas utilization, achieving good dispersion and low wear. , the effect of improving utilization

CN111440358AActive Publication Date: 2020-07-24麒祥新材料(山东)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-07-24

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Abstract

The invention provides nano silicon dioxide for rubber reinforcement and a preparation method thereof. The average pore size of the nano silicon dioxide is less than or equal to 25nm, dV / dlogD (a corresponding numerical value at 80nm in nitrogen adsorption data) is less than or equal to 1.8, the nitrogen adsorption specific surface area is 180-360m < 2 > / g, the total pore volume is 1.1-2.0 cm < 3> / g, and the median particle size is 1.0-10mu m. Specifically, the nano silicon dioxide is prepared by taking water glass and carbon dioxide as raw materials, carrying out multistage carbonization reaction in a membrane dispersion reaction kettle, and then carrying out aging, filtering pressing, pulping and spraying processes. The nano silicon dioxide prepared by the invention is added into the rubber composition, so that the mechanical property of rubber can be improved, the abrasion of a rubber composition can be reduced, and the wet skid resistance of the rubber composition can be improved.
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Description

technical field

[0001] The invention relates to the technical field of rubber additives, in particular to the technical field of rubber reinforcing additives, in particular to a rubber reinforcing nano silica and a preparation method thereof. Background technique

[0002] Silica is an amorphous silicic acid and Silicate The general name of the product, its chemical composition is SiO 2 ·nH 2 O, which has excellent reinforcing properties, is often used in tires in the rubber industry, and is also used in industries such as pesticides, feed and coatings. It is an important basic material.

[0003] With the increasing pressure of environmental protection, the problem of "black pollution" of traditional tires urgently needs to be solved. Green tires made of highly dispersed silica are becoming more and more popular. Green tires have good elasticity, low rolling resistance, low fuel consumption, and It has the advantages of low heat, wear resistance, puncture resistance, large...

Examples

Embodiment 1

[0044] A kind of preparation method that is used for rubber reinforcing additive described in this embodiment, comprises the steps:

[0045] 1) Install a 1μm dispersion film on the stirring blade of the reactor.

[0046] 2) Take the first grade sodium silicate solution with a modulus of 3.4 and a commercially available Baume degree of 38, and prepare 120L of dilute water glass with a Baume degree of 22;

[0047] 3) Pump the sodium silicate solution in step 1) into a 150L reactor, turn on the stirring and heat the liquid, set the stirring speed to 12Hz, and the temperature to 70°C;

[0048] 4) When the temperature reaches 70°C, open the carbon dioxide valve, the gas enters the solution through the hollow shaft of the stirring paddle and the membrane dispersion paddle, and the carbon dioxide gas with a concentration of 100wt% is introduced, and the stirring speed is increased to 20Hz at the same time;

[0049] 5) After injecting carbon dioxide gas for 28 minutes, stop the venti...

Embodiment 2

[0056] A kind of preparation method that is used for rubber reinforcing additive described in this embodiment, comprises the steps:

[0057] 1) Install a 5μm dispersion film on the stirring blade of the reactor.

[0058] 2) Take the first grade sodium silicate solution with a modulus of 3.2 and a commercially available Baume degree of 38, and prepare 120L of dilute water glass with a Baume degree of 25;

[0059] 3) Pump the sodium silicate solution in step 2) into a 150L reactor, turn on the stirring and heat the liquid, set the stirring speed to 12Hz, and the temperature to 70°C;

[0060] 4) When the temperature reaches 70°C, open the carbon dioxide valve, the gas enters the solution through the hollow shaft of the stirring paddle and the membrane dispersion paddle, and the carbon dioxide gas with a concentration of 100wt% is introduced, and the stirring speed is increased to 20Hz at the same time;

[0061] 5) After injecting carbon dioxide gas for 20 minutes, stop the venti...

Embodiment 3

[0068] A kind of preparation method that is used for rubber reinforcing additive described in this embodiment, comprises the steps:

[0069] 1) Install a 20μm dispersion film on the stirring blade of the reactor.

[0070] 2) Take the first grade sodium silicate solution with a modulus of 3.3 and a commercially available Baume degree of about 38, and prepare 120L of dilute water glass with a Baume degree of 16;

[0071] 3) Pump the sodium silicate solution in step 2) into a 150L reactor, turn on the stirring and heat the liquid, set the stirring speed to 12Hz, and the temperature to 70°C;

[0072] 4) When the temperature reaches 70°C, open the carbon dioxide valve, the gas enters the solution through the hollow shaft of the stirring paddle and the membrane dispersion paddle, and the carbon dioxide gas with a concentration of 100wt% is introduced, and the stirring speed is increased to 20Hz at the same time;

[0073] 5) After injecting carbon dioxide gas for 20 minutes, stop th...