Method for preparing small-fraction 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 small-volume filled composite masterbatches, can solve problems such as low volume heat transfer coefficient and thermal efficiency, large power consumption, and environmental protection issues, and achieve excellent air permeability resistance and reduce Waste of energy, cost-saving effect

Inactive 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

However, there are disadvantages such as large power consumption, low volumetric heat transfer coefficient and thermal efficiency, potential safety hazards, and environmental protection problems.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 5 g of carbon black to 495 g of water, stir to obtain a solid content of 1% carbon black aqueous solution, mix with 500 g of field natural latex with a solid content of 20%, add 3 g of zinc oxide and 1 g of stearic acid after stirring.

[0036] The prepared mixed slurry is passed into a semi-open superheated steam spray drying tower, the atomized particle size is controlled to 10 μm, the drying medium is superheated steam at 140°C, the inlet temperature of the spray drying equipment is 180°C, and the outlet air temperature is Pass through a 20um sieve at 100°C to collect the dried carbon black / natural rubber nanocomposite masterbatch. The rubber mixing formula is 109phr of the above-mentioned masterbatch, 1.2phr of accelerator CZ, 40101phr of anti-aging agent, and 2phr of sulfur. Then the rubber is mixed, vulcanized, and tested for mechanical properties.

Embodiment 2

[0038] Add 20 g of carbon black into 80 g of water, stir to obtain a solid content of 20% carbon black aqueous solution, mix with 333 g of field natural latex with a solid content of 30%, add 5 g of zinc oxide and 3 g of stearic acid after stirring.

[0039] The prepared mixed slurry is passed into the semi-open superheated steam spray drying tower, the atomized particle size is controlled to 100 μm, the drying medium is superheated steam at 250 °C, the inlet temperature of the spray drying equipment is 300 °C, and the outlet air temperature is 120°C, pass through a 100um sieve plate, collect the carbon black / natural rubber nanocomposite masterbatch that has been calendered and dried into blocks, and the mixing formula is 128phr of the above masterbatch, and the rest of the steps are as in Example 1.

Embodiment 3

[0041] Add 20 g of white carbon black into 80 g of water, stir evenly to obtain a white carbon black aqueous solution with a solid content of 20%. Mix with 250g of neoprene latex with a solid content of 40%, add latex consumption 5g of zinc oxide and 1g of stearic acid after stirring.

[0042] The prepared mixed slurry is passed into the semi-open superheated steam spray drying tower, the atomized particle size is controlled to 80 μm, the drying medium is superheated steam at 200 °C, the inlet temperature of the spray drying equipment is 250 °C, and the outlet air temperature is Pass through a 100um sieve plate at 110°C to collect the dried and calendered white carbon black / chloroprene rubber nanocomposite masterbatch. The rubber mixing formula is 126phr of the above-mentioned masterbatch, and the remaining steps are as in Example 1.

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Abstract

The invention provides a method for preparing small-fraction filling composite masterbatch through a semi-open type superheated steam spray-drying method. The technological method is used for preparing rubber nanocomposites through wet mixing and is less in energy consumption, safe and simple in technology. Rubber latex is selected and used for being mixed with filler slurry, a certain quantity of rubber auxiliary is added and stirred to be uniform, an obtained mixture is dried through a semi-open type superheated steam spray tower at a certain feed rate, the nano composite rubber masterbatch is prepared and collected and passes through a sieve plate, and blocks are formed after rolling is conducted. The method is simple in technology, complete in reaction, safe, free of hidden dangers, less in energy consumption and capable of reducing cost; human factors are few, continuous production can be achieved, the product quality is stable, industrial research is easy, and green and environmental protection is achieved. By means of the rubber masterbatch produced through the method, inorganic filler can be uniformly dispersed in a rubber matrix in a nano-scaled mode, and the rubber masterbatch can be applied to the fields such as saloon car tread rubber and engineering tread rubber.

Description

technical field [0001] The invention relates to a method for preparing a small portion of filled composite masterbatch by a semi-open superheated steam spray drying method. The rubber nanocomposite masterbatch obtained by the method is mainly used in the fields of car tread rubber, engineering tread rubber and the like. Background technique [0002] Carbon black, silica, and clay are the most widely used fillers in rubber today. In the traditional dry mixing process of carbon black, carbon black has the disadvantages that most of the combination with colloidal particles is physical adsorption, large rolling resistance, and large internal friction loss. However, white carbon black is easy to absorb water, and its binding ability with non-polar rubber is weak. During the dry mixing process, the specific gravity of white carbon black is small, which will cause dust to fly and cause environmental pollution, and it is easy to cause self-agglomeration in the rubber matrix. And o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L11/02C08L9/08C08K3/04C08K3/36C08K3/22C08K5/09
Inventor 王益庆张志辉沈家锋张立群
Owner BEIJING UNIV OF CHEM TECH
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