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A method for preparing high-filling composite masterbatch by semi-open superheated steam spray drying method

A spray-drying and superheated steam technology is applied in the field of preparing high-filling compound masterbatches, which can solve the problems of restricting the development of spray-drying, rubber thermal-oxidative aging, serious problems, etc. high effect

Active Publication Date: 2019-03-01
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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  • A method for preparing high-filling composite masterbatch by semi-open superheated steam spray drying method
  • A method for preparing high-filling composite masterbatch by semi-open 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 130phr of the above masterbatch, 5phr of ZnO, 2phr of stearic acid, 1phr of antioxidant 1010NA, 1.2phr of accelerator CZ, 2phr of sulfur, mix the rubber, measure the vulcanization curve and rubber processing performance after parking for 8 hours, vulcanize at 143°C, and measure the m...

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

A method for preparing high-filling composite masterbatch by means of a semi-open type superheated steam spray drying method. The method is characterized in that: preparing inorganic filler suspension by adding water, adding a modifier for treatment, adding the fully-ground inorganic filler suspension into rubber emulsion and stirring the rubber emulsion to be uniform, carrying out spray drying under the condition without demulsification, so as to obtain a powder or microbead-shaped composite masterbatch product. In the method, the process is simple, the rubber component is completely reserved, the problem of high-filling masterbatch is resolved, 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 the industrialization is easy. By means of the prepared nano composite masterbatch, an inorganic filler can be uniformly dispersed in a rubber matrix in a nano-scale form, and the nano composite masterbatch can be applied to car tires, engineering tread rubber and other fields.

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