Process for producing melamine foam sponge

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

Active Publication Date: 2017-02-15
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 melamine foam sponge, which solves the problems of high brittleness, easy powder drop and low tensile tear strength of existing melamine foam sponge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides a kind of production technique of melamine foam sponge, comprises the following steps:

[0030] (1) Take melamine and paraformaldehyde with a molar ratio of 1:3 and mix them evenly;

[0031] (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;

[0032] (3) Add 20% of one or more aqueous sodium bisulfite solutions at the feed end, middle position or end of the first screw machine; the amount of the auxiliary material solution is 0.05g / g relative to the mixed material.

[0033] (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

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

[0042] (1) Take melamine and paraformaldehyde with a molar ratio of 1:2 and mix them evenly;

[0043] (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;

[0044] (3) Add 10% of one or more sodium sulfite solutions 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.

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

Embodiment 3

[0053]The present embodiment provides a kind of production technique of melamine foam sponge, comprises the following steps:

[0054] (1) Take melamine and paraformaldehyde with a molar ratio of 1:4 and mix them evenly;

[0055] (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;

[0056] (3) Add 45% of one or more sodium metabisulfite aqueous solutions at the feed end, middle position or end of the first screw machine; the amount of sodium metabisulfite aqueous solution is 0.01g / g relative to the mixed material.

[0057] (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 th...

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Abstract

The invention discloses a process for producing melamine foam sponge, comprising the steps of mixing well melamine and paraformaldehyde; pumping the mixture to a first screw unit by a material pump, and adding alkali liquid to a feed port of the first screw unit; adding auxiliary solution to the feed end, middle or tail end of the first screw unit; feeding to a second screw unit, transparent resin extruded from an outlet of the first screw unit, and continuing polymerization in the second screw unit; allowing transparent resin from the tail of the second screw unit to pass through a cooling device and then enter a third screw unit; introducing a foaming agent, an emulsifying agent, a stabilizer and a curing agent from the middle of the third screw unit, and mixing well with the resin; introducing the mixed resin to a microwave foaming furnace for foaming to form high-porosity melamine foam sponge; the process of the invention makes high use of materials, has high yield, and can provide continuous production of melamine foam sponge with stable quality and high porosity.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a production process of melamine 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 foam sponge refers to melamine formaldehyde foam that can be made from melamine resin through foaming reaction. This foam is non-flammable, water-resistant, heat-resistant, aging-resistant, arc-resistant, chemical-resistant, and has good insulation performance, gloss and mechanical properties. Strength, but also has a good sound-absorbing effect. Therefore, it is widely used in sound-absorbing and flame-retardant buildings, automobiles, aircraft carriers, submari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/32C08J9/14C08L61/28
CPCC08G12/32C08J9/141C08J9/147C08J2203/14C08J2203/144C08J2203/182C08J2361/28
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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