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Preparation method of melamine hard closed pore foams

A melamine and closed-cell foam technology, which is applied in the field of polymer foam material preparation, can solve the problems of environmental pollution, difficult removal of alcohol substances, unstable foam quality, etc. The effect of reducing viscosity

Active Publication Date: 2019-04-16
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201410494905 discloses a technical scheme of using methanol as a solvent to modify melamine resin by carbonate. Although a melamine hard foam with better flame retardancy has been prepared, the process is industrially scaled up due to the increase in the volume of the synthetic resin. , the alcohols are difficult to completely remove, resulting in unstable foam quality and causing some pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 252g of melamine, 75.6g of hydroxyethoxyethyl melamine, 194.4g of paraformaldehyde, 23.2g of hexamethylenediamine and 134.9g of water into a 1L glass flask with stirring, start stirring to mix the materials evenly, and use triethylamine to dissolve the materials Adjust the pH to about 9.5, react in a water bath at 90°C until the material is clear and transparent, then lower the temperature to 70°C and continue the reaction for 4 hours. The resin has a solid content of 80%, a viscosity of 12500mpa.s (25°C), and is cooled for later use.

[0025] Get this resin 100g and surfactant sodium dodecylbenzenesulfonate 1.5g, curing agent p-toluenesulfonic acid 5g, blowing agent n-pentane 5g, auxiliary agent FQ-5503 (Jiangsu Meiside Chemical Co., Ltd.) 3g was forced to mix uniformly at 1200rpm, poured into a pre-prepared mold, placed in an oven at 70°C for foaming for 15 minutes, and then transferred to 100°C for curing for 2 hours to obtain foam MF2.

Embodiment 2

[0027] Add 252g of melamine, 50.4g of hydroxyethoxyethyl melamine, 189.4g of paraformaldehyde, 23.2g of hexamethylenediamine and 128.7g of water into a 1L glass flask with stirring, start stirring to mix the materials evenly, and use triethylamine to dissolve the materials Adjust the pH to about 9.5, react in a water bath at 90°C until the material is clear and transparent, then lower the temperature to 70°C and continue the reaction for 4 hours. The resin has a solid content of 80%, a viscosity of 13000mpa.s (25°C), and is cooled for later use.

[0028]Get this resin 100g and surfactant sodium dodecylbenzenesulfonate 1.5g, curing agent phosphoric acid (85%) 5g, blowing agent n-pentane 5g, silane coupling agent KBE-403 (Shin-Etsu Chemical Organic Silicon Co., Ltd. )3g was mixed uniformly at 1200rpm, poured into a pre-prepared mold, placed in an oven at 70°C for foaming for 15 minutes, and then transferred to 100°C for curing for 2 hours to obtain foam MF3.

Embodiment 3

[0030] Add 252g of melamine, 25.2g of hydroxyethoxyethyl melamine, 184.8g of paraformaldehyde, 17.6g of butanediamine and 119.9g of water into a 1L glass flask with stirring, start stirring to mix the materials evenly, and use diethanolamine to adjust the pH of the materials to Adjust to about 9.5, react in a water bath at 90°C until the material is clear and transparent, then lower the temperature to 70°C and continue the reaction for 4 hours. The resin has a solid content of 80%, a viscosity of 13700mpa.s (25°C), and is cooled for later use.

[0031] Get this resin 100g and surfactant nonylphenol polyoxyethylene ether sodium sulfate 1.5g, curing agent sulfuric acid (65%) 5g, whipping agent cyclopentane 5g, silane coupling agent KBE-402 (Shin-Etsu Chemical Organic Silicon Co., Ltd. Company) 3g was mixed uniformly at 1200rpm, poured into a pre-prepared mold, placed in an oven at 70°C for foaming for 15 minutes, and then transferred to 100°C for curing for 2 hours to obtain foa...

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PUM

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Abstract

The invention belongs to the technical field of macromolecule foam materials, and particularly relates to a preparation method of melamine hard closed pore foams. The method includes the steps that melamine, paraformaldehyde, hydroxyethoxyethyl melamine and diamine are pre-polymerized to form foaming resin, then a solidifying agent, and a foaming agent, an additive and others are added for preparing the melamine hard closed pore foams through heating. The melamine hard closed pore foams prepared through the method has the advantages of being high in compressive strength, weather resistance andporosity by closed pore and excellent in flame retardancy, and can be applied to markets of air conditioner air hoses, batten boards and external wall thermal-insulation materials.

Description

technical field [0001] The invention relates to the technical field of polymer foam material preparation, in particular to a preparation method of melamine rigid closed-cell foam. Background technique [0002] Efficient utilization of energy has become a common topic for all mankind. There are a large number of various buildings used in people's daily life and work. Every year, huge energy waste is caused by building heat loss. Building insulation maintenance has become a hot research topic. However, in recent years, fires have occurred frequently in the field of construction at home and abroad, especially the fires in high-rise buildings have caused great property losses and casualties. One of the reasons is that the flammable external wall insulation materials have caused the rapid spread and expansion of the fire. For this reason, the Ministry of Public Security, the Ministry of Housing and Urban-Rural Development issued a series of documents and notices such as Document ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L61/30C08G12/34
CPCC08G12/34C08J9/141C08J2203/14C08J2205/052C08J2361/30
Inventor 王顺平邓朝元李刚郭志刚
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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