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Composite foamable agent and its preparation method

A composite foaming agent and inorganic foaming agent technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve problems such as foaming agent failure, increase foaming ratio, improve fluidity and dispersibility , the effect of improving liquidity

Active Publication Date: 2007-02-07
HANGZHOU HI TECH FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, acidic surfactants and coupling agents will react with bicarbonate, causing the blowing agent to decompose. At the same time, most of the treatment process is carried out in a solvent or heated at a high temperature, which will also cause the blowing agent to decompose. fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 25 kg of sodium bicarbonate is pulverized by a jet mill, 15 kg of the pulverized product is placed in a high-speed mixer, 1.5 kg of activated 3A molecular sieves are added, the mixer is sealed, and the mixture is quickly mixed for 5 minutes to obtain the present invention. blowing agent powder. The remaining 10 kg of untreated sodium bicarbonate was used as a contrast blowing agent. It can be found that the fluidity of the composite blowing agent powder provided by the invention is greatly improved, and it does not agglomerate after being placed in the polyethylene bag for a long time, and still has good fluidity.

Embodiment 2

[0035] 15 kilograms of sodium bicarbonate are pulverized by a jet mill, the pulverized product is placed in a high-speed mixer, 1.5 kilograms of activated 4A molecular sieves are added, and after the mixer is sealed, it is quickly mixed for 5 minutes to obtain the invention. Foam powder. It can be found that the fluidity of the composite blowing agent powder provided by the invention is greatly improved, and it does not agglomerate after being placed in the polyethylene bag for a long time, and still has good fluidity.

Embodiment 3

[0037] 15 kilograms of sodium bicarbonate are pulverized by a jet mill, the pulverized product is placed in a high-speed mixer, 1.0 kilograms of activated 13X molecular sieves are added, and after the mixer is sealed, it is quickly mixed for 5 minutes to obtain the invention's Foam powder. It can be found that the fluidity of the composite blowing agent powder provided by the present invention is greatly improved, and it does not agglomerate after being placed in the polyethylene bag for a long time, and still has good fluidity.

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PUM

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Abstract

The invention relates to a composites foaming agent, which comprises inorganic foaming agent as bicarbonate and molecule screen, while the amount of molecule screen is 0.5-50 deals when the bicarbonate is 100 deals, wherein the bicarbonate can use baking soda, potassium acid carbonate, or ammonium acid carbonate or the mixture of them; and the preparation comprises: selecting the bicarbonate; breaking with machine or airflow; then mixing the inorganic foaming agent with molecule screen in the mixer; the invention has the advantages that: 1, it has better flow property and disperse property; it can effectively increase the foaming time and the contract rate of product; 3, it can foam the macromolecule polymer that sensitive to water; 4, the added macromolecule screen will not affect the property of macromolecule polymer.

Description

technical field [0001] The invention relates to the field of foaming agents, and mainly relates to a composite foaming agent and a preparation method thereof. Background technique [0002] It is well known that foam sponges can be produced by adding foaming agents to plastics and rubber. The added foaming agent decomposes and releases gas under specific temperature and pressure, forming a porous foam-like structure in resin and other expandable materials. There are many kinds of commonly used chemical foaming agents, which can be divided into exothermic foaming agents and endothermic foaming agents according to the heat generated by decomposition. Exothermic foaming agents include azodicarbonamide (ADC), disulfide Various organic foaming agents such as nitropentamethylenediamine and sulfonyl hydrazide; the endothermic foaming agent is mainly bicarbonate and bicarbonate and citric acid compound, usually an inorganic foaming agent. [0003] In...

Claims

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Application Information

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IPC IPC(8): B01F17/00C08K3/26C08K9/00C08J9/00C09K23/00
Inventor 于家波王振飞胡传飞陈海贤
Owner HANGZHOU HI TECH FINE CHEM
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