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Production process of melamine-formaldehyde resin foam sponge

A technology of melamine resin and foam sponge, which is applied in the field of organic synthesis, can solve the problems of low tensile and tear strength, easy to drop powder, and high brittleness, and achieve high tensile tear strength, not easy to drop powder, and low brittleness. Effect

Active Publication Date: 2017-05-10
郑州峰泰纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a production process of a melamine resin foam sponge, which solves the problems of the existing melamine resin foam sponges such as high brittleness, easy powder drop, and low tensile and tear strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The present embodiment provides a kind of production technology of melamine resin foam sponge, comprises the following steps:

[0042] (1) Take melamine and paraformaldehyde with a molar ratio of 1:3 and mix them evenly;

[0043] (2) The mixed material is imported into the first screw machine by the material pump, and 0.3% NaOH aqueous solution is added at the feed port of the first screw machine, so that the pH value of the internal material is 9, and the reaction system reacts during the conveying and mixing process. The time is 8min, and the reaction temperature is 120°C;

[0044] (3) Add 20% sodium bisulfite aqueous solution at the feed end, middle position or end of the first screw machine; the addition amount of the auxiliary material solution is 0.05g / g relative to the mixed material.

[0045] (4) The transparent resin extruded from the outlet of the first screw machine enters the second screw machine, and the polymerization reaction is continued in the second s...

Embodiment 2

[0062] The present embodiment provides a kind of production technology of melamine resin foam sponge, comprises the following steps:

[0063] (1) Take melamine and paraformaldehyde with a molar ratio of 1:2 and mix them evenly;

[0064] (2) The mixed material is imported into the first screw machine by the material pump, and 0.2% triethylamine aqueous solution is added at the feed port of the first screw machine, so that the pH value of the internal material is 8, and the reaction system reacts during the conveying and mixing process , the reaction time is 10min, and the reaction temperature is 80°C;

[0065] (3) Add 10% sodium sulfite solution at the feed end, middle position or end of the first screw machine; the addition amount of the auxiliary material solution is 0.1 g / g relative to the mixed material.

[0066] (4) The transparent resin extruded from the outlet of the first screw machine enters the second screw machine, and the polymerization reaction is continued in the...

Embodiment 3

[0083] The present embodiment provides a kind of production technology of melamine resin foam sponge, comprises the following steps:

[0084] (1) Take melamine and paraformaldehyde with a molar ratio of 1:4 and mix them evenly;

[0085] (2) The mixed material is imported into the first screw machine by the material pump, and 0.5% NaOH aqueous solution is added at the feed port of the first screw machine, so that the pH value of the internal material is 10, and the reaction system reacts during the conveying and mixing process. The time is 5min, and the reaction temperature is 160°C;

[0086] (3) Add 45% sodium metabisulfite aqueous solution at the feeding end, middle position or end of the first screw machine; the addition amount of sodium metabisulfite aqueous solution is 0.01g / g relative to the mixed material.

[0087] (4) The transparent resin extruded from the outlet of the first screw machine enters the second screw machine, and the polymerization reaction is continued i...

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Abstract

The invention discloses a production process of melamine-formaldehyde resin foam sponge. The production process comprises the following steps: melamine and paraformaldehyde are taken and mixed evenly; the mixed material is conveyed into a first screw machine by a material pump, and lye is added at a feed inlet of the first screw machine; an auxiliary material solution is added to the feed end, the middle position or the tail end of the first screw machine; transparent resin extruded from an outlet of the first screw machine enters a second screw machine to be subjected to a polymerization reaction continuously in the second screw machine; the transparent resin discharged out of the tail of the second screw machine enters a third screw machine after passing through a cooling device; a foaming agent, an emulsifier, a stabilizer and a curing agent are fed from the middle of the third screw machine and mixed with the resin uniformly; the resin mixed uniformly is introduced into a microwave foaming furnace for foaming, and the melamine-formaldehyde resin foam sponge with high aperture ratio is formed. The production process of the melamine-formaldehyde resin foam sponge has high utilization rate and high yield, the melamine-formaldehyde resin foam sponge with stable production quality can be produced continuously, and the aperture ratio is high.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a production process of a melamine resin foam sponge. Background technique [0002] Melamine resin, also known as melamine-formaldehyde resin, is a polymer obtained by the reaction of melamine and formaldehyde. A cross-linking reaction occurs during processing and molding, and the product is an infusible thermosetting resin. It is customarily called amino resin together with urea-formaldehyde resin. [0003] Melamine resin foam sponge refers to the use of melamine resin to make melamine formaldehyde foam through foaming reaction. This foam is non-flammable, water-resistant, heat-resistant, aging-resistant, arc-resistant, chemical-resistant, and has good insulation properties and gloss. And mechanical strength, but also has a good sound-absorbing effect. Therefore, it is widely used in sound-absorbing and flame-retardant buildings, automobiles, aircraft carriers, subma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/32C08J9/14C08L61/28B29C69/02B29C47/38B29C47/92B29C44/02B29C48/395B29C48/92
CPCB29C44/02B29C48/0012B29C48/395B29C48/92B29C2948/92704C08G12/32C08J9/141C08J9/147C08J2203/14C08J2203/144C08J2203/182C08J2361/28
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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