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Low-temperature type ADCA (Azodicarbonamide) foaming agent and preparation method as well as application thereof

A foaming agent, low-temperature technology, applied in the field of foaming agents, can solve the problems of low foaming agent magnification, reduced foaming agent gas generation, poor anti-aging degree, etc., so as to improve the degree of production automation and reduce foaming temperature. , the effect of extensive use of value

Inactive Publication Date: 2013-03-20
ZAOZHUANG ZHONGKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing ADCA foaming agent is used, it has the following disadvantages: high decomposition temperature, greater than 210°C, low foaming agent ratio, poor tensile and aging resistance of the foam layer material, poor color and poor compactness, and many more
Although these decomposition accelerators can reduce the decomposition temperature of the low-temperature ADCA foaming agent, they also reduce the gas generation of the foaming agent, thereby reducing the foaming ratio of the foamed product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare the material according to the weight percentage of 25% activator and 75% ADCA, and then prepare according to the following method.

[0032] The ADCA is mixed and crushed by supersonic airflow. When the airflow is forced through the nozzle of the crushing chamber under the action of its own high pressure, a high-speed airflow will be generated. ADCA enters the supersonic nozzle through the ejection effect of negative pressure, and is accelerated to a certain level under the action of high-speed airflow. The high-pressure airflow carries the particles in the crushing chamber for rotary motion and forms a strong swirling airflow, which accelerates, mixes and impacts, collides, and other behaviors of the particles. The particles continue to be crushed in the crushing chamber. After multi-channel sub-sieving and filtration, it reaches 10-18um (that is, sub-micron level) professional products.

[0033] Under the action of compressed air, the activator forms a high-sp...

Embodiment 2

[0037] By weight percent, in the blowing agent, azodicarbonamide is 50%, sodium carbonate is 20%, sodium stearate is 10%, zinc oxide is 2%, guanidine nitrate is 13%, and white carbon black is 2%. %. The preparation method is the same as in Example 1.

[0038] The obtained product was tested, and the foaming temperature was 112°C. The amount of gas generated under the conditions of 25° C. and 1 atmospheric pressure was 218 ml / g. The particle size of the product is 10-18um.

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PUM

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Abstract

The invention relates to a low-temperature type ADCA (Azodicarbonamide) foaming agent. The low-temperature type ADCA foaming agent is formed by combining one or more activating agents and ADCA according to a certain proportion, wherein the activating agent can be selected from metallic compounds such as chromium, zinc and lead, urea derivatives, nitroguanidine and the like. The lowest decomposition temperature of the foaming agent provided by the invention can reach 150 DEG C-112 DEG C; the forming agent is a novel heat absorption type forming agent and has a stable, compact and regular foam structure; and the foaming agent can be widely used for rolling leathers and rubbers and is simultaneously used for foaming medicines.

Description

technical field [0001] The invention relates to a foaming agent, in particular to a low-temperature ADCA foaming agent. The invention also relates to the preparation and application of the foaming agent. Background technique [0002] ADCA, that is, azodicarbonamide, the molecular formula is H 2 NCONNCONH 2 , Appearance is light yellow crystalline powder. ADCA itself is non-toxic, odorless, non-flammable, and has the characteristics of large gas generation, uniform bubbles, no pollution to the product, no corrosion to the mold, adjustable decomposition temperature, and does not affect the curing and molding speed, so it is widely used in PVC Foaming of synthetic materials such as ethylene, polyethylene, polypropylene, polystyrene, ABS and various rubbers. [0003] When the existing ADCA foaming agent is used, it has the following disadvantages: high decomposition temperature, greater than 210°C, low foaming agent ratio, poor tensile and aging resistance of the foam layer ...

Claims

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Application Information

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IPC IPC(8): C08J9/10
Inventor 田振民秦峰鲍家民杨杰卓猛赵春花褚建
Owner ZAOZHUANG ZHONGKE CHEM
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