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Novel environmentally friendly foaming agent and preparation method thereof

A foaming agent, environmental protection technology, applied in the field of new environmental protection foaming agent and its preparation, can solve the problems of high production cost, limited application, long decomposition temperature range, etc., achieve low production cost, broad market prospect, high decomposition temperature short-term effect

Inactive Publication Date: 2019-04-05
SHANGHAI YIKE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pollution caused by azodicarbonamide in the production process is serious, and formamide will be produced after use and decomposition. The pressure on environmental protection is high, and it will produce unpleasant ammonia odor during the application process. The above defects make azodimethylamine The application of the
The preparation process of foamed microspheres is complicated, the production cost is high, and its application is also greatly restricted.
[0003] Sodium bicarbonate is a cheap, easy-to-obtain, and environmentally friendly endothermic foaming agent. It generates carbon dioxide and water after heating. The decomposition temperature of untreated sodium bicarbonate is low and the decomposition temperature range is long. It is extremely difficult to meet the requirements of general-purpose plastics. Therefore, increasing the decomposition temperature of sodium bicarbonate and reducing the decomposition temperature range of sodium bicarbonate are urgent problems to be solved at present
Some literatures focus more on the modification of sodium bicarbonate in the adjustment of acidic substances, but the reaction speed of sodium bicarbonate and acidic substances is accelerated under the condition of water, and the decomposition temperature of sodium bicarbonate cannot be improved, resulting in its Applications in foamed products are limited

Method used

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  • Novel environmentally friendly foaming agent and preparation method thereof
  • Novel environmentally friendly foaming agent and preparation method thereof
  • Novel environmentally friendly foaming agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A novel environment-friendly blowing agent, its preparation method is as follows:

[0025] (1) Prepare sodium bicarbonate powder;

[0026] S1, take by weighing the sodium bicarbonate of 100kg, under dry condition, pulverize after pulverizer, obtain sodium bicarbonate powder, the average particle diameter of sodium bicarbonate is 10 μ m;

[0027] S2, in the sodium bicarbonate powder agitator obtained in S2, adopt pressurized nozzle to spray liquid paraffin spray to the surface of sodium bicarbonate powder;

[0028] S3. Mix the sodium bicarbonate powder and the liquid paraffin in a stirrer, the speed of the stirrer is 100 rpm, and the stirring time is 10 min.

[0029] Among them, S2 and S3 are performed simultaneously.

[0030] (2) Prepare foaming agent;

[0031] Weigh 5 kg of crushed citric acid in a blender, the average particle size of the crushed citric acid is 10 μm, add 2 kg of calcium hardate to the blender, stir for 3 min at a speed of 100 rpm, and add 3 kg of ...

Embodiment 2

[0033] (1) Prepare sodium bicarbonate sodium bicarbonate powder;

[0034] S1, take by weighing the sodium bicarbonate of 100kg, under dry condition, pulverize after pulverizer, obtain sodium bicarbonate powder, the average particle diameter of sodium bicarbonate is 10 μ m;

[0035] S2, in the sodium bicarbonate powder agitator obtained in S2, adopt pressurized nozzle to spray liquid paraffin spray to the surface of sodium bicarbonate powder;

[0036] S3. Mix the sodium bicarbonate powder and the liquid paraffin in a stirrer, the speed of the stirrer is 100 rpm, and the stirring time is 10 min.

[0037] Wherein, S3 is performed after S2.

[0038] (2) Preparation of foaming agent

[0039] Weigh 5 kg of crushed citric acid in a blender, the average particle size of the crushed citric acid is 10 μm, add 5 kg of calcium hardate to the blender, stir for 5 min at a speed of 100 rpm, add (1) The sodium bicarbonate powder 90kg that prepares in, under the rotating speed condition of ...

Embodiment 3

[0041] A novel environment-friendly blowing agent, its preparation method is as follows:

[0042] (1) Prepare sodium bicarbonate powder;

[0043] S1, take by weighing the sodium bicarbonate of 100kg, under dry condition, pulverize after pulverizer, obtain sodium bicarbonate powder, the average particle diameter of sodium bicarbonate is 10 μ m;

[0044] S2, in the sodium bicarbonate powder agitator obtained in S2, adopt pressurized nozzle to spray liquid paraffin spray to the surface of sodium bicarbonate powder;

[0045] S3. Mix the sodium bicarbonate powder and the liquid paraffin in a stirrer, the speed of the stirrer is 100 rpm, and the stirring time is 10 min.

[0046] Among them, S2 and S3 are performed simultaneously.

[0047] (2) Prepare foaming agent;

[0048] Weigh 5 kg of crushed citric acid in a blender, the average particle size of the crushed citric acid is 10 μm, add 5 kg of calcium oxide to the blender, continue stirring for 3 min at a speed of 100 rpm, add (...

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Abstract

The invention discloses a novel environmentally friendly foaming agent. The foaming agent is characterized by including, by weight, the following components: 50-90 parts of sodium bicarbonate powder,5-40 parts of a pH regulating agent, 0-10 parts of a dispersion and separation agent, and 0-10 parts of a dehumidifying agent. The decomposition temperature of the novel environmentally friendly foaming agent of the invention reaches 185 DEG C-190 DEG C, and the foaming agent can replace a decomposition field of azodicarbonamide in the range from 180 DEG C to 190 DEG C; the decomposition temperature range is shorter, an ammoniacal odour does not generate during a decomposition process, a hidden danger of formamide residues does not exist, and the foaming agent is safe and environmentally friendly, is far lower in production cost than that of foaming microspheres, is broad in market prospect, and has positive social significance.

Description

technical field [0001] The invention relates to the technical field of polymer additives, in particular to a novel environment-friendly foaming agent and a preparation method thereof. Background technique [0002] With the wide application of foaming materials, foaming agents, as a key factor in the preparation of foaming materials, have received more and more attention. According to whether chemical reactions occur, foaming agents can be divided into physical foaming agents and chemical foaming agents. Among them, the chemical foaming agent is a foaming material. The common chemical foaming agents on the market are azodicarbonamide and foaming microspheres. The pollution caused by azodicarbonamide in the production process is serious, and formamide will be produced after use and decomposition. The pressure on environmental protection is high, and it will produce unpleasant ammonia odor during the application process. The above defects make azodimethylamine application is...

Claims

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Application Information

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IPC IPC(8): C08J9/08C08L25/06C08L23/12C08L21/00
CPCC08J9/0023C08J9/0066C08J9/08C08J2203/02C08J2321/00C08J2323/12C08J2325/06
Inventor 杨晓梅张瑞洋
Owner SHANGHAI YIKE IND CO LTD
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