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Method for preparing inorganic compound melamine hard foaming nano-material

A technology for compounding melamine and inorganic nanomaterials is applied in the field of polymer foam materials, which can solve the problems of not very obvious effect, easy powder loss of materials, insufficient strength, etc., and achieve excellent mechanical properties and flame retardant properties, mild reaction process, and toughness. Good results

Inactive Publication Date: 2017-08-04
HENAN JUNHUA DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to foreign technical secrecy and technical barriers, the current domestic research on melamine rigid foam materials is still in the laboratory stage.
[0004] The main reasons that affect the advancement of melamine rigid foam materials are the shortcomings of easy powder loss, insufficient strength, and poor toughness. Current research is mainly focused on using organic polymer modifiers to increase the chain structure of melamine formaldehyde to improve its toughness. Or improve the composition of the foaming liquid and the foaming process conditions to improve the overall performance of the material, etc., but the effect is not very obvious, but the research on the inorganic nanocomposite melamine rigid foam material is due to the compatibility between the inorganic material and the organic resin. Poor and no progress

Method used

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  • Method for preparing inorganic compound melamine hard foaming nano-material
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  • Method for preparing inorganic compound melamine hard foaming nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An inorganic nanocomposite melamine rigid foam material is prepared according to the following steps:

[0038] A. Add 3 mol of paraformaldehyde and 6.0 mol of water into the reactor, add dropwise triethanolamine, adjust the pH to 8.5, then add 1 mol of melamine, heat up to 80°C, and stir for 1.5 hours to obtain polyhydroxymelamine;

[0039] B, in the polyhydroxy melamine, drop into the hydrochloric acid that massfraction is 2%, regulate system pH value to 6.5; Then add 2.52g nano silicon dioxide (0.02 times of melamine quality) and 12.6g polycyanamide under the condition of 60~70 ℃ Ethylene glycol (0.1 times the mass of melamine), acidic polymerization reaction at 65 ° C, polymerization reaction 1.0h, a three-dimensional network polymerization reaction occurs, until the reaction solution is slightly turbid, to obtain a prepolymer resin solution;

[0040] C, under room temperature, in the prepolymer resin solution, add the emulsifier sodium dodecylbenzene sulfonate, 5% b...

Embodiment 2

[0042] An inorganic nanocomposite melamine rigid foam material is prepared according to the following steps:

[0043]A. Add 3.5 mol of paraformaldehyde and 5.5 mol of water into the reactor, add dropwise a 20% sodium hydroxide solution, adjust the pH to 9.0, then add 1 mol of melamine, raise the temperature to 90°C, and stir for 1.5 hours , namely polyhydroxymelamine;

[0044] B, in the polyhydroxy melamine, drip the hydrochloric acid that mass fraction is 2%, regulate system pH value to 6.0; Then add 1.26g nano titanium dioxide (0.01 times of melamine quality) and 6.31g polyvinyl alcohol under the condition of 70~80 ℃ (0.05 times the mass of melamine), acidic polymerization reaction was carried out at 75°C, the polymerization reaction was 1.0h, and a three-dimensional network polymerization reaction occurred until the reaction solution was slightly turbid to obtain a prepolymer resin solution;

[0045] C, under room temperature, in prepolymer resin solution, adding weight is...

Embodiment 3

[0047] An inorganic nanocomposite melamine rigid foam material is prepared according to the following steps:

[0048] A. Add 4mol paraformaldehyde and 6.0mol water into the reactor, add triethylamine dropwise, adjust the pH value to 8.0, then add 1mol melamine, heat up to 80°C, and stir for 1.5h to obtain polyhydroxymelamine;

[0049] B, in polyhydroxy melamine, drip the hydrochloric acid that massfraction is 2%, regulate system pH value to 5.5; Then add 1.89g nanometer montmorillonite (0.015 times of melamine quality) and 15.13g on the condition of 60~70 ℃ Toluenesulfonamide (0.12 times the mass of melamine) was subjected to an acidic polymerization reaction at 65° C. for 1.0 h, and a three-dimensional network polymerization reaction occurred until the reaction solution was slightly turbid to obtain a prepolymer resin solution;

[0050] C, under room temperature, in prepolymer resin solution, adding weight is the emulsifier fatty alcohol polyoxyethylene ether sodium sulfate o...

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Abstract

The invention discloses a method for preparing an inorganic compound melamine hard foaming nano-material. The method comprises the following steps: A, causing melamine, paraformaldehyde and water to react to produce polyhydroxy melamine; B, adding an inorganic nano-material and a modifying agent into the polyhydroxy melamine to form a prepolymer resin solution; C, adding an emulsifying agent, a foaming agent, a foam stabilizer and a curing agent into the prepolymer resin solution, uniformly stirring, foaming in a microwave oven, and curing to obtain the inorganic compound melamine hard foaming nano-material. According to the method, an inorganic nano-material having an inorganically treated surface and the modifying agent are added into polyhydroxy melamine, so that the inorganic nano-material is directly dispersed in a resin system and participates in an acidic polycondensation process to form a crossed three-dimensional reticular structure with resin, and therefore, the product has the advantages of melamine and the special properties of nano-particles, and has the advantages of high strength, high modulus, good toughness, high temperature resistance and the like on mechanical performance.

Description

technical field [0001] The invention relates to a preparation method of an inorganic nanocomposite melamine rigid foaming material, belonging to the technical field of polymer foaming materials. Background technique [0002] Melamine foam plastic is a deep-processing product of melamine developed in recent years. It has the characteristics of high porosity, low density, high flame retardancy, sound absorption, heat insulation, safety and environmental protection, etc. It is used in industry, civil, construction, transportation, aviation, military , electronic information and other fields have very important application value, and are especially suitable for use in environmental conditions that require flame retardancy, high temperature, and low-frequency noise absorption. [0003] The current domestic industrialized melamine foam material is a soft foam with an open-cell structure, while the rigid foam material shows some excellent characteristics due to its special closed-c...

Claims

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Application Information

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IPC IPC(8): C08G12/40C08K9/00C08K3/36C08K3/22C08K3/34C08J9/14
CPCC08G12/40C08J9/141C08J9/145C08J2203/14C08J2203/142C08J2205/052C08J2361/32C08K3/22C08K3/34C08K3/346C08K3/36C08K9/00C08K2003/2241C08K2201/003C08K2201/011C08G2110/0025C08G2110/005
Inventor 汤广斌孙浩杰
Owner HENAN JUNHUA DEV
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