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High-flexibility melamino-formaldehyde foam material and preparation method thereof

A technology of melamine formaldehyde and foam materials, which is applied in the field of polymer foam materials and foam materials, can solve the problems of complicated preparation process, easy powder drop of foam, high production cost, etc., achieve simple production process, improve foam powder drop, and low production cost Effect

Inactive Publication Date: 2010-06-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For the shortcoming of the existing manufacturing technology of melamine formaldehyde foam, the object of the invention aims to disclose a kind of new highly flexible melamine formaldehyde foam material and its manufacturing technology, to solve the brittleness that the melamine formaldehyde foam material of prior art exists is big, Poor flexibility, easy foam powder drop, complex preparation process, high production cost, etc.

Method used

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  • High-flexibility melamino-formaldehyde foam material and preparation method thereof
  • High-flexibility melamino-formaldehyde foam material and preparation method thereof
  • High-flexibility melamino-formaldehyde foam material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] (1) Pour the formaldehyde solution with a weight concentration of 37% into the reactor, heat and stabilize it in a water bath at about 30°C, adjust the pH value of the solution to about 8.8 with triethanolamine, and then use the molar ratio of formaldehyde and melamine to be 2.5 / 1 Add melamine, and at the same time raise the temperature to about 90°C and react for about 70 minutes. Then the reactor was separated from the water bath, stirred and cooled to obtain a transparent prepolymer solution.

[0029] (2) Measure 100 parts of the prepolymer solution prepared in step 1 and pour it into a container. In a water bath at about 40°C, add 2 parts of sodium lauryl sulfate and stir at 400 rpm for about 1 minute, then add 9.5 parts of chlorine Ammonium chloride, stir until it is completely dissolved, add 10 parts of petroleum ether and increase the speed to 1200rpm. After the petroleum ether is completely dispersed in the suspension, add 3 parts of hydrochloric acid, then pour...

Embodiment 2

[0031] (1) Pour the formaldehyde solution with a weight concentration of 37% into the reactor, heat and stabilize it in a water bath at about 30°C, adjust the pH value of the solution to about 8.8 with triethanolamine, and then use the molar ratio of formaldehyde and melamine to be 3 / 1 Add melamine and starch, and raise the temperature to about 90°C to react for about 70 minutes. Then the reactor was separated from the water bath, stirred and cooled to obtain a transparent prepolymer solution.

[0032] (2) Measure 100 parts of the prepolymer solution prepared in step 1 and pour it into a container, add 2 parts of sodium dodecylbenzenesulfonate in a water bath at about 40°C and stir at 400 rpm for about 1 minute, then add 7 1 part of ammonium sulfate, stir until it is completely dissolved, add 8 parts of chloroform and increase the speed to 1200rpm, wait until the chloroform is completely dispersed in the suspension, add 4 parts of phosphoric acid, then pour it into a microwave...

Embodiment 3

[0034] (1) Pour 37% formaldehyde solution into a three-necked flask, heat and stabilize it in a water bath at about 35°C, adjust the pH value of the solution to about 9.0 with triethanolamine, and then add melamine according to the molar ratio of formaldehyde and melamine as 3.5 / 1 And polyvinyl alcohol 1099, after the polyvinyl alcohol swells for 1 hour, raise the temperature to 90°C and react for 70 minutes. Lift the flask out of the water bath, stir and cool to obtain a transparent solution.

[0035] (2) Measure 100 parts of the prepolymer solution prepared in step 1 and pour it into a container, put it in a water bath at 50°C, add 1.5 parts of Span 80 and stir at 400 rpm for about 1 minute, then add 6 parts of ammonium bisulfate, and stir After it is completely dissolved, add 12 parts of cyclohexane and increase the rotating speed to 1200rpm. After the cyclohexane is completely dispersed in the suspension, add 2 parts of sulfuric acid, then pour it into a microwave oven bow...

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Abstract

The invention discloses a high-flexibility melamino-formaldehyde foam material and a preparation method thereof. The preparation method comprises: firstly, preparing melamino-formaldehyde prepolymer modified by polyol into aqueous solution with definite weight concentration; weighting 100 parts by weight of prepolymer aqueous solution; adding 0-15 parts by weight of surfactant, 1-20 parts by weight of foaming agent, 0-10 parts by weight of accelerator and 0-10 parts by weight of curing agent to be fully stirred and mixed to prepare foaming liquid; filling foaming liquid into a microwave chemical reactor or a high-temperature oven; and foaming for 30s-15min at the temperature of 100-300 DEG C to prepare the foam material. The melamino-formaldehyde foam material disclosed by the invention solves the problems of big brittleness, poor flexibility, easy duslting of foam, complex preparation technology, high production cost and the like of the existing melamino-formaldehyde foam material and has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of polymer foam materials, and more specifically relates to a foam material prepared from melamine-formaldehyde resin as a raw material and a preparation method of the foam material. technical background [0002] Melamine formaldehyde foam (MF Foam) has low density and open-cell structure, which has excellent sound insulation, noise reduction and sound absorption effects, and also has good mechanical properties, heat resistance, aging resistance, impact resistance, acid and alkali resistance and dielectric properties. performance. The most important property of melamine formaldehyde foam is its body flame retardancy, which can completely eliminate the fire safety hazards of traditional foam plastics. Because of its excellent flame retardancy, sound insulation and mechanical properties, melamine formaldehyde foam has been widely used in public places, vehicles, road sound insulation, etc., and plays an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/32C08J9/14
Inventor 包建军卓坚锐孙杨宣贾向明黄静
Owner SICHUAN UNIV
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