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Production process of melamine foamed plastic

A technology of melamine and foam plastics, which is applied in the field of polymer material synthesis, can solve the problems of excessive waste gas, air pollution, and high content, and achieve the effects of simple production process, full use of energy, and low production cost

Active Publication Date: 2015-06-24
JIAXING HANGXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing production process of melamine foamed plastics often has complicated procedures, and more waste gas is often generated during the production process. If it is directly discharged into the air, it will pollute the atmospheric environment
In addition, the content of free formaldehyde in the melamine foam prepared by the existing production process is often high, which cannot be used as an environmentally friendly and safe material

Method used

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  • Production process of melamine foamed plastic
  • Production process of melamine foamed plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of production technology of melamine foamed plastics, mainly comprises the following steps:

[0029] (1) Put a certain amount of paraformaldehyde in the reaction kettle, then add a certain amount of formaldehyde solution, heat the reaction kettle until the solid particles of paraformaldehyde in the reaction kettle are completely dissolved, add an appropriate amount of alkali to adjust the pH value in the reaction kettle 8.5~10;

[0030] (2) Put quantitative solid powdery melamine into the reaction kettle of the above step 1, raise the temperature in the reaction kettle to 70° C., and continue the insulation reaction for 60 minutes;

[0031] (3) After the material in the kettle in the above step 2 is cooled to room temperature, adjust the pH value of the material solution in the reaction kettle with an appropriate amount of acid to be 2.5 to 4.5;

[0032] (4) Heating the material solution in the above step 3, when the temperature rises to 70°C, heat the reaction ...

Embodiment 2

[0049] A kind of production technology of melamine foamed plastics, mainly comprises the following steps:

[0050] (1) Put a certain amount of paraformaldehyde in the reaction kettle, then add a certain amount of formaldehyde solution, heat the reaction kettle until the solid particles of paraformaldehyde in the reaction kettle are completely dissolved, add an appropriate amount of alkali to adjust the pH value in the reaction kettle 8.5~10;

[0051] (2) Quantitative solid powdery melamine is put into the reaction kettle of the above-mentioned step 1, after raising the temperature in the reaction kettle to 75° C., continue the insulation reaction for 45 minutes;

[0052](3) After the material in the kettle in the above step 2 is cooled to room temperature, adjust the pH value of the material solution in the reaction kettle with an appropriate amount of acid to be 2.5 to 4.5;

[0053] (4) Heating the material solution in the above step 3, when the temperature rises to 75° C., ...

Embodiment 3

[0070] A kind of production technology of melamine foamed plastics, mainly comprises the following steps:

[0071] (1) Put a certain amount of paraformaldehyde in the reaction kettle, then add a certain amount of formaldehyde solution, heat the reaction kettle until the solid particles of paraformaldehyde in the reaction kettle are completely dissolved, add an appropriate amount of alkali to adjust the pH value in the reaction kettle 8.5~10;

[0072] (2) Put quantitative solid powdery melamine into the reaction kettle of the above-mentioned step 1, after raising the temperature in the reaction kettle to 80° C., continue the insulation reaction for 30 minutes;

[0073] (3) After the material in the kettle in the above step 2 is cooled to room temperature, adjust the pH value of the material solution in the reaction kettle with an appropriate amount of acid to be 2.5 to 4.5;

[0074] (4) Heating the material solution in the above step 3, when the temperature rises to 80° C., he...

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Abstract

The invention provides a production process of a melamine foamed plastic. Melamine, paraformaldehyde and formaldehyde solution are used as raw materials to prepare the melamine foamed plastic with excellent sound absorption property, fire resistance, heat-resisting stability and sanitary security; in the production process, the mole ratio of the melamine to the paraformaldehyde to the formaldehyde solution are 1:(2.0-3.0):(1.0-2.0); the microwave foaming is performed in a microwave heating cavity to finally generate the highly opened melamine foamed plastic. The tail gas produced in the microwave foaming process and an oven baking process is led to a heating power incinerator to incinerate after being collected, and then is discharged at high altitude through an induced draft fan; and meanwhile, the heating power incinerator can be used for supplying the heat for the microwave foaming furnace and the oven. The production process of the melamine foamed plastic provided by the invention is simple, low in production and small in environment pollution; the free formaldehyde residual quantity of the obtained product is not more than 10ppm, and the production process is extremely safe and environmentally friendly.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a production process of melamine foamed plastics. Background technique [0002] Melamine foam plastic, also known as melamine foam plastic, is a new type of foam plastic with a low-density three-dimensional grid structure made of melamine as the main raw material with an opening rate of more than 97%. It is called melamine foam or melamine sponge. Melamine foam plastic has excellent sound absorption, flame retardancy, heat resistance stability, hygiene safety and good secondary processing performance, and is widely used in construction, transportation, industry, vehicle manufacturing, acoustic engineering, military, daily chemical, electronic information , Aerospace navigation, surface cleaning and decontamination and other fields have broad application prospects. [0003] The existing melamine foamed plastics production process often has complicated procedures, and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/28C08J9/14C08G12/32
Inventor 蒋红卫
Owner JIAXING HANGXING FINE CHEM