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Preparation method of AC foaming agent

A technology of foaming agent and crystal seed is applied in the field of preparation of AC foaming agent, which can solve the problems of rough surface of particles, single variety, unable to meet market demand, etc.

Active Publication Date: 2020-07-07
JIANGXI SELON INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the products exported and sold in my country are the original foaming agent AC powder, which has a single variety, and has the characteristics of rough particle surface and wide particle size distribution range.

Method used

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  • Preparation method of AC foaming agent
  • Preparation method of AC foaming agent
  • Preparation method of AC foaming agent

Examples

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preparation example Construction

[0050] A preparation method of AC blowing agent, comprising the following steps:

[0051] (1). Grinding the biurea raw material: filter and wash the synthesized biurea, and ultrafinely pulverize the biurea to a particle size of 4-8 μm;

[0052] (2). Preparation of biurea slurry: Add water to the pulverized biurea to make a biurea slurry containing 20-40% of biurea, and then add biurea with a mass ratio of 0.3-10%. Oxidation aids;

[0053] (3). Generation of seed crystals: The configured 3% to 10% biurea slurry is sprayed at high speed through a liquid injection device, and enters the injection reaction device from an inlet of the injection reaction device, and forms in the injection reaction device. Vacuum, the chlorine gas is sucked into the jet reaction device from another inlet of the jet reaction device, and the two are vigorously mixed in the jet reaction device to form a large number of AC blowing agent seeds in an instant, and the reaction mixture with AC blowing agent...

Embodiment 1

[0066] (1). Grinding the biurea raw material: filter and wash the synthesized biurea, and ultrafinely pulverize the biurea to a particle size of 4-8 μm;

[0067] (2). Preparation of biurea slurry: add water to the pulverized biurea to form a biurea slurry containing 20% ​​biurea, and then add an oxidation aid with a mass ratio of 5% biurea;

[0068] (3). Generation of crystal seeds: the configured 10% biurea slurry is ejected at high speed through a liquid injection device, and enters the injection reaction device from an inlet of the injection reaction device, and a vacuum is formed in the injection reaction device. Chlorine gas is sucked into the jet reaction device from another inlet of the jet reaction device, and the two are violently mixed in the jet reaction device to form a large amount of AC blowing agent crystal seeds instantly, and collect the reaction mixture with the AC blowing agent crystal seeds;

[0069] (4). Mix evenly: add the remaining biurea slurry and the ...

Embodiment 2

[0073] (1). Grinding the biurea raw material: filter and wash the synthesized biurea, and ultrafinely pulverize the biurea to a particle size of 4-8 μm;

[0074] (2). Preparation of biurea slurry: add water to the pulverized biurea to form a biurea slurry containing 35% biurea, and then add an oxidation aid with a mass ratio of 10% biurea;

[0075] (3). Generation of crystal seeds: the configured 10% biurea slurry is ejected at high speed through a liquid injection device, and enters the injection reaction device from an inlet of the injection reaction device, and a vacuum is formed in the injection reaction device. Chlorine gas is sucked into the jet reaction device from another inlet of the jet reaction device, and the two are violently mixed in the jet reaction device to form a large amount of AC blowing agent crystal seeds instantly, and collect the reaction mixture with the AC blowing agent crystal seeds;

[0076] (4). Mix evenly: add the remaining biurea slurry and the A...

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Abstract

The invention relates to a preparation method of an AC foaming agent, which comprises the following steps: violently mixing part of biurea slurry and chlorine by using a jet reaction device, instantaneously reacting to generate an AC foaming agent crystal nucleus, adding the crystal nucleus into the residual biurea slurry, and adding an oxidant to oxidize to generate the AC foaming agent. The process has the advantages that the particle size and the particle size distribution range of the AC foaming agent can be controlled, the use stability of the AC foaming agent is improved, and the added value and the market competitiveness of products are improved.

Description

technical field [0001] The invention relates to the technical field of AC foaming agent, in particular the invention relates to a preparation method of AC foaming agent. Background technique [0002] AC (scientific name azodicarbonamide) foaming agent can decompose in a very narrow temperature range and produce a large amount of gas in a very short time, and the generated gas and residue are non-toxic, odorless, non-polluting, non-coloring, and non-toxic. Corrosion processing equipment, does not affect the mechanical properties and stability of the product, has good dispersion in plastics and rubber, and forms fine and uniform cells. It is the most widely used organic foaming agent in the world. [0003] An important indicator to measure the quality of AC foaming agent products is the particle size and distribution state of the product. The particle size distribution of existing products is wide and irregular. If the particle size distribution of AC foaming agent is too wide...

Claims

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Application Information

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IPC IPC(8): C07C281/20
CPCC07C281/20
Inventor 宋新民郑小辉潘晓海
Owner JIANGXI SELON INDAL
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