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Uniformly dispersed ultrafine ADC foaming agent preparation method

An ADC foaming agent and dispersion technology, which is applied in the field of preparation of uniformly dispersed ultrafine ADC foaming agent, can solve the problem that the particle size distribution and ultrafine particle size cannot be guaranteed, and the ADC particle size distribution and particle size value are not recorded. problems, to achieve the effect of reducing production costs and improving production efficiency

Active Publication Date: 2019-05-10
JIANGSU SOPO CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention does not record the particle size distribution and particle size value of the prepared ADC, that is, the ADC prepared by the invention cannot guarantee excellent particle size distribution and ultrafine particle size

Method used

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  • Uniformly dispersed ultrafine ADC foaming agent preparation method
  • Uniformly dispersed ultrafine ADC foaming agent preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of biurea suspension: Add 5.0g of biurea, 0.1g of sodium bromide (NaBr) and 0.05g of polyvinylpyrrolidone (PVP K30) into a 250mL round bottom flask, then add 150mL of distilled water to prepare biurea suspension;

[0029] (2) Disperse biurea suspension: put the container in step (1) into a water bath, control the temperature at 25°C, pre-stir the biurea suspension prepared in step (1), and the stirring speed is 400r / min, to fully disperse the raw materials;

[0030] (3) Oxidation reaction: keep the stirring speed and the temperature constant in the step (2), connect the ventilation pipe and the glass rotameter, pass into chlorine gas, take no tail gas leakage as the standard, carry out the oxidation reaction until the end of the reaction;

[0031] (4) After the reaction, the slurry was filtered, washed and dried to obtain an ultrafine ADC foaming agent with an average particle size (D50) of 0.939 μm.

[0032] The prepared ultrafine ADC blowing agent i...

Embodiment 2

[0034] (1) Preparation of biurea suspension: Add 5.0g of biurea, 0.1g of sodium bromide (NaBr) and 0.15g of polyvinylpyrrolidone (PVP K30) into a 250mL round bottom flask, then add 150mL of distilled water to prepare biurea suspension;

[0035] (2) Disperse biurea suspension: put the container in step (1) into a water bath, control the temperature at 25°C, pre-stir the biurea suspension prepared in step (1), and the stirring speed is 400r / min, to fully disperse the raw materials;

[0036] (3) Oxidation reaction: keep the stirring speed and the temperature constant in the step (2), connect the ventilation pipe and the glass rotameter, pass into chlorine gas, take no tail gas leakage as the standard, carry out the oxidation reaction until the end of the reaction;

[0037] (4) After the reaction, the slurry was filtered, washed and dried to obtain an ultrafine ADC foaming agent with an average particle size (D50) of 0.878 μm.

Embodiment 3

[0039] (1) Preparation of biurea suspension: Add 5.0g of biurea, 0.1g of sodium bromide (NaBr) and 0.05g of polyvinylpyrrolidone (PVP K90) into the container, then add 150ml of distilled water into the container to prepare Diurea suspension was obtained;

[0040] (2) Disperse biurea suspension: put the container in step (1) into a water bath, control the temperature at 25°C, pre-stir the biurea suspension prepared in step (1), and the stirring speed is 400r / min, to fully disperse the raw materials;

[0041] (3) Oxidation reaction: keep the stirring speed and the temperature constant in the step (2), connect the ventilation pipe and the glass rotameter, pass into chlorine gas, take no tail gas leakage as the standard, carry out the oxidation reaction until the end of the reaction;

[0042] (4) After the reaction, the slurry was filtered, washed and dried to obtain an ultrafine ADC foaming agent with an average particle size (D50) of 1.49 μm.

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Abstract

The invention discloses a uniformly dispersed ultrafine ADC foaming agent preparation method. The method includes steps: biurea suspension preparation, to be more specific, adding biurea, a catalyst and a surfactant into a container, and adding distilled water into the container to obtain biurea suspension; biurea suspension dispersion, to be more specific, putting the container into a water bath,controlling the temperature at 25 DEG C, and pre-stirring the biurea suspension to enable complete dispersion of raw materials; oxidation reaction, to be more specific, keeping the stirring speed andtemperature unchanged, turning on a chlorine valve to feed chlorine, and performing oxidation reaction until reaction is finished; after reaction is finished, filtering, washing and drying slurry toobtain a uniformly dispersed ultrafine ADC foaming agent. By adding of the surfactant, the gibbs free energy of ADC crystal grains can be reduced so as to control ADC particle size. By adoption of themethod, the ultrafine ADC foaming agent uniform in particle size can be directly prepared, a mechanical crushing process of large-particle-size ADC foaming agents in conventional production is avoided, and accordingly production cost is sharply reduced.

Description

technical field [0001] The invention relates to the field of ADC foaming agents, in particular to a method for preparing a uniformly dispersed ultrafine ADC foaming agent. Background technique [0002] A foaming agent is a substance that can make a polymer matrix or a metal melt produce a microporous structure, so that the polymer or metal has certain special properties. Hancock and others used physical foaming agents to produce sponges in 1846, which opened the prelude to the industrial application of foaming agents. Foaming agents have developed from simple physical foaming agents and inorganic chemical foaming agents to today's wide variety of organic chemical foaming agents and composite foaming agents, and their application fields are also constantly expanding. The emergence of foaming agent has led to the rapid development of foamed products. Foamed products have excellent properties such as heat insulation, sound insulation, insulation, light weight, low density, str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C281/20C08J9/10B22F3/11C22C1/08
Inventor 郝春成黄永明朱桂生郭如涛
Owner JIANGSU SOPO CHEM