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Modified foaming agent and preparation method thereof

A foaming agent and modification technology, applied in the field of modified foaming agent and its preparation, can solve the problems of unfavorable extrusion and injection molding process, affecting product quality and output, inconvenient product processing, etc., to achieve stable product quality, Guaranteed non-caking and fluidity-enhancing effects

Active Publication Date: 2007-02-28
HANGZHOU HI TECH FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Processing machinery must be stopped regularly to remove deposits, and their formation is especially unfavorable to extrusion and injection molding processes, which brings great inconvenience and uneconomical product processing, and affects the quality and output of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of ZnX zeolite

[0033] 150 g ZnSO 4 .7H 2 O was dissolved in 300 ml of deionized water, and 30 g of sodium zeolite (13X molecular sieve) was added, and stirred at room temperature for ion exchange for 24 hours. Then filter with suction, wash the filter cake twice with deionized water, then dry the filter cake at 150°C for 2 hours, and finally bake it at 400°C for 2 hours, and cool it in a desiccator to obtain ZnX molecular sieve activated powder. The zinc content was determined to be 14.1% (Na%=2.8%).

Embodiment 2

[0035] 200 grams of ADCA whipping agent (average particle diameter 4-6 μm), is placed in the food blender, adds the ZnX molecular sieve prepared in the embodiment 1 of different amounts respectively, then the blender is covered and sealed, and stirred for 5 minutes to obtain Blowing agent of the present invention.

[0036] Add 0.5 g of the above sample into a 25 m test tube, heat it in an oil bath, and raise the temperature to 220 °C at a rate of 2-3 °C per minute, and the released gas enters the burette through the hose. Record the temperature, atmospheric pressure and room temperature when the blowing agent decomposes, and calculate the gas generation under S.T.P. The results are listed in Table-1.

[0037] Foaming agent

[0038] Comparing sample No. 1 without molecular sieve and other samples No. 2, 3, 4, and 5, it can be found that the fluidity of samples No. 2, 3, 4, and 5 is significantly improved, and it is placed in a sealed polyethylene plastic bag for 3 mon...

Embodiment 3

[0040] 200 grams of ADCA foaming agent (average particle diameter 4-6 μ m) is placed in a food blender, and various amounts of 3A, 4A, and 5A molecular sieves are added respectively, then the blender is covered and sealed, and stirred for 5 minutes to obtain this product. Invented blowing agent.

[0041] Add 0.5 g of the above sample into a 25 m test tube, heat it in an oil bath, and raise the temperature to 220 °C at a rate of 2-3 °C per minute, and the released gas enters the burette through the hose. Record the temperature, atmospheric pressure and room temperature when the blowing agent decomposes, and calculate the gas generation under S.T.P. The results are listed in Table-2.

[0042] Foaming agent

[0043] Comparing sample No. 1 without molecular sieve and other samples No. 6-11, it can be found that the fluidity of sample No. 6-11 has been significantly improved, and the fluidity has not decreased significantly after being placed in a sealed polyethylene plas...

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PUM

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Abstract

The invention discloses a modification vesicant, which consists of modification vesicant and molecular sieve, wherein the dosage of the molecular sieve is 0.5-30 parts by weight, when the modification vesicant is 100 parts by weight; the modification vesicant is elected from azobisformamide, 4, 4'-oxo dianil sulfuryl, benzene sulfonyl hydrazide, Unifor, dinitroso pentamethine fouramine and sodium bicarbonate or their mixtures. The modification vesicant is prepared by mixing up with the kibbling modification vesicant and molecular sieve in mixing plant proportions by weight.

Description

technical field [0001] The invention relates to the field of foaming agents, and mainly relates to a modified 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. The most commonly used chemical blowing agents are organic chemical blowing agents, specifically including azodicarbonamide (ADCA), dinitrosopentamethylenetetramine (DPT), and sulfonyl hydrazides. The commonly used inorganic blowing agent is sodium bicarbonate. [0003] These blowing agents are usually in powder form, and during transportation or storage, they usually condense and solidify to form agglomerates, and their fluidity decreases. The finer the particle size of the blowing agent, the more seri...

Claims

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Application Information

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IPC IPC(8): C08J9/06C08J9/10C09K3/00
Inventor 于家波汪慧军陈海贤
Owner HANGZHOU HI TECH FINE CHEM
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