Method for preparing high-filling composite masterbatch through semi-open type superheated steam spray-drying method

A technology of spray drying and superheated steam, which is applied in the field of preparing high-filling composite masterbatch, can solve the problems of restricting the development of spray drying, rubber thermal oxygen aging, combustion, etc. low effect

Active Publication Date: 2016-03-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there are many problems in the application of spray drying in the field of rubber, which limits the development of spray drying in the field of rubber drying.
The main limitation is that during the drying process, due to the high local temperature, the thermal oxygen aging of the rubber will be more serious, and even combustion will occur.

Method used

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  • Method for preparing high-filling composite masterbatch through semi-open type superheated steam spray-drying method
  • Method for preparing high-filling composite masterbatch through semi-open type superheated steam spray-drying method

Examples

Experimental program
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Effect test

Embodiment 1

[0036]Add 30 g of commercially available carbon black N234 powder into 970 g of water, stir evenly, then add 15 g of ethanol, stir and grind for 15 minutes to obtain a carbon black suspension. Under stirring, 333.3g of natural emulsion with a solid content of 30% was mixed to obtain a mixed solution with a particle size of 5 μm colloidal particles, and the evenly stirred mixed solution was subjected to semi-open superheated steam spray drying treatment, and the atomized droplets were controlled at 30 μm , the spray drying inlet temperature is 150°C, and the outlet temperature is 80°C to obtain powdered nanocomposite masterbatch, and ethanol is condensed and recovered during the drying process. Take the above masterbatch 130phr, ZnO5phr, stearic acid 2phr, anti-aging agent 1010NA1phr, accelerator CZ1.2phr, sulfur 2phr, mix the rubber, measure the vulcanization curve and rubber processing performance after parking for 8 hours, vulcanize at 143 ° C, and measure the mechanical prop...

Embodiment 2

[0038] Add 60 g of commercially available carbon black N330 powder into 140 g of water, stir evenly, then add 60 g of ethanol, stir and grind for 15 min to obtain a carbon black suspension. Under stirring, mix 333.3g of natural rubber latex with a solid content of 30% to obtain a mixed solution with a particle size of 20 μm, and carry out a semi-open superheated steam spray drying treatment on the mixed solution evenly stirred, and control the atomized droplets at 100 μm , the spray drying inlet temperature is 350°C, and the outlet temperature is 120°C to obtain powdered nanocomposite masterbatch, and ethanol is condensed and recovered during the drying process. Get above-mentioned masterbatch 160phr, all the other steps are with embodiment 1.

Embodiment 3

[0040] Add 50 g of commercially available carbon black N110 powder into 450 g of water, stir evenly, then add 30 g of ethanol, stir and grind for 15 min to obtain a carbon black suspension. Under stirring, mix 250g of styrene-butadiene latex with a solid content of 40% to obtain a mixed solution with a particle size of 10 μm colloidal particles, and carry out a semi-open superheated steam spray drying process on the evenly stirred mixed solution, and control the atomized droplets at 50 μm , the spray drying inlet temperature is 250°C, and the outlet temperature is 100°C to obtain powdered nanocomposite masterbatch, and ethanol is condensed and recovered during the drying process. Get above-mentioned masterbatch 150phr, all the other steps are with embodiment 1.

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Abstract

The invention provides a method for preparing high-filling composite masterbatch through a semi-open type superheated steam spray-drying method, and relates to the field of preparation of high-filling composite rubber masterbatch. Modification treatment is conducted on inorganic filler through a modifying agent, the modified inorganic filler is ground and uniformly dispersed into a rubber emulsion, and then the technology of using a spray-drying technology to prepare the high-filling composite masterbatch is adopted. The technology comprises the steps that inorganic suspension liquid is prepared by adding water, the modifying agent is added for treatment, the fully-ground inorganic suspension liquid is added to the rubber emulsion and stirred to be uniform, spray drying is conducted under the condition without demulsification, and a powder or microbead-shaped composite masterbatch product is obtained. According to the method for preparing the high-filling composite masterbatch through the semi-open type superheated steam spray-drying method, the technology is simple, the rubber component is completely reserved, the problem of high-filling masterbatch is solved, no flocculant is added, pollution does not exist, the drying time is short, human factors are few, continuous production can be achieved, the product quality is stable, and industrialization is easy. By means of the nano composite masterbatch, the inorganic filler can be uniformly dispersed in a rubber matrix in a nano-scaled mode, and the nano composite masterbatch can be applied to the fields such as saloon car tires and engineering tread rubber.

Description

technical field [0001] The invention relates to a method for preparing high-filling composite masterbatch by a semi-open superheated steam spray drying method. The rubber high-filling nano-composite masterbatch obtained by the method is mainly used in the fields of car tread rubber, engineering tread rubber and the like. Background technique [0002] The traditional method of preparing rubber uses rubber emulsion as raw material, which is solidified by adding acid, and then compressed into tablets or granulated, dried and dehydrated to make rubber. The traditional process not only takes a long time to prepare, but also is basically a manual operation, and there are large errors. The production process requires a large amount of acid as a desiccant, and the waste water generated during the treatment process cannot be treated, polluting the environment. At the same time, the quality of the traditional rubber preparation process is not easy to control, resulting in poor produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L9/08C08L9/04C08L11/02C08K13/06C08K9/04C08K9/06C08K3/04C08K3/36C08K3/34
CPCC08K3/04C08K3/34C08K9/04C08K9/06C08K13/06C08L7/02C08L9/04C08L9/08C08L11/02C08K3/346C08K3/36
Inventor 王益庆沈家锋张志辉张立群
Owner BEIJING UNIV OF CHEM TECH
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