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Preparation method of environment-friendly type melamine-based foamed plastic

A foamed plastic and melamine-based technology, which is applied in the field of preparation of environment-friendly melamine-based foamed plastics, can solve problems such as hindering the application range of products, affecting people's physical and mental health, restricting market application fields, etc., achieving non-volatile, convenient storage, smooth response

Active Publication Date: 2019-06-04
PUYANG GREEN FOAM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high formaldehyde emission of melamine-based foam plastics currently on the market, which pollutes the environment and affects people's physical and mental health, it seriously hinders the promotion of the product's application range and limits its market application field.

Method used

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  • Preparation method of environment-friendly type melamine-based foamed plastic
  • Preparation method of environment-friendly type melamine-based foamed plastic
  • Preparation method of environment-friendly type melamine-based foamed plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the environment-friendly melamine-based foam plastic of the present invention, the detailed steps of the preparation method are as follows:

[0042] (1) Preparation of expandable low-formaldehyde melamine-based resin:

[0043] a, with melamine, paraformaldehyde and water as main raw materials; expressed in weight kg, the addition of three main raw materials is respectively melamine 600Kg, paraformaldehyde 328.6Kg and desalted water 310Kg;

[0044] B, take by weighing melamine, paraformaldehyde and water according to the addition of three kinds of main raw materials described in step a, add three kinds of raw materials that take by weighing in the reactor and stir evenly, then add modified monomer benzomelamine 3Kg, then Add a sodium hydroxide solution with a mass percentage concentration of 20% to adjust the pH value to 8-9; when the steam is heated until the temperature of the reaction solution reaches 90°C, reduce the amount of steam introduc...

Embodiment 2

[0058] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0059] The preparation method of the environment-friendly melamine-based foamed plastic of the present invention is basically the same as that of Example 1, except that:

[0060] (1) Preparation of expandable low-formaldehyde melamine-based resin:

[0061] a, represented by weight kg, the addition of three main raw materials is respectively melamine 600Kg, paraformaldehyde 357.1Kg and desalted water 319Kg;

[0062] b. Then use a sodium hydroxide solution with a mass percentage concentration of 25% to adjust the pH value to 8-9, then add 6Kg of modified monomer ultrafine polyimide resin powder; Reduce the amount of steam input and react at a constant temperature for 2.5 hours, close the steam inlet valve, and the reaction is over;

[0063] c. Then add 6.4Kg of aldehyde-removing functional monomer 1,3-dimethyl-2-imidazolidinone;

[0064] (2) Preparation of mixing aids:

[0065] Add 60Kg of 40% sodi...

Embodiment 3

[0074] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0075] The preparation method of the environment-friendly melamine-based foamed plastic of the present invention is basically the same as that of Example 1, except that:

[0076] (1) Preparation of expandable low-formaldehyde melamine-based resin:

[0077] a, represented by weight kg, the addition of three main raw materials is respectively 600Kg of melamine, 400Kg of paraformaldehyde and 340Kg of desalted water;

[0078] b. Then use a sodium hydroxide solution with a concentration of 25% by mass to adjust the pH value to 8-9, then add 9Kg of modified monomer tris-(2-hydroxyethyl)isocyanate; , turn down the amount of steam into the constant temperature reaction for 2 hours, close the steam inlet valve, the reaction is over;

[0079] c, then add 13.4Kg of aldehyde-removing functional monomer melamine,

[0080] (2) Preparation of mixing aids:

[0081] Add 64Kg of 25% sodium alkylnaphthalene sulfona...

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Abstract

The invention discloses a preparation method of environment-friendly type melamine-based foamed plastic, comprising the following steps: firstly adding melamine, paraformaldehyde and water into a reactor, adding a modified monomer, adjusting pH value of the solution, and then reacting by steam heating; adding a formaldehyde-removal functional monomer after the reaction and continuously stirring and reacting to obtain expandable low-formaldehyde melamine-based resin; successively adding an emulsifier, a compound curing agent and a foaming agent into an auxiliary agent reaction vessel and uniformly mixing to obtain a mixed auxiliary agent; cooling the resin, respectively metering and carrying out high-speed emulsification on the resin and the mixed auxiliary agent in a twin-screw extruder, carrying out microwave foaming after the emulsification to obtain melamine-based foam M1; and finally drying the melamine-based foam M1 successively by superheated steam and microwave drying treatmentso as to obtain the environmentally-friendly type melamine-based foamed plastic product. According to the invention, industrial production of the melamine-based foamed plastic product with zero formaldehyde release is realized, and the key indexes for industrialization of the melamine-based foamed plastic and the environmental safe process bottleneck are solved.

Description

1. Technical field: [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing an environment-friendly melamine-based foam plastic. 2. Background technology: [0002] Melamine-based foam, also known as melamine foam, is mostly made of melamine formaldehyde resin through microwave foaming to obtain a three-dimensional network cross-linked structure with an opening rate of more than 99%. This product has excellent sound absorption and flame retardancy. Performance, heat insulation, anti-fungal, friction, health and safety and good secondary processability and other comprehensive properties. These characteristics make the product widely used in the fields of aerospace, navigation and aviation, construction venues, factory construction, air conditioning equipment, rail transit, electronic products, biological pollution control engineering and other fields, especially for flame retardant, high temperature, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/40C08J9/14C08L61/32
Inventor 史悦智胜兆泉陈言胜何利华蒋凡顺魏兰军刘军法李金纳李慧霞孟凡会孙伟李岳站程红光陈永达
Owner PUYANG GREEN FOAM CO LTD
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