Production method of ultralow density high-tenacity high-elasticity melamine foams

A technology of ultra-low density and production method, which is applied in the production field of ultra-low density, high toughness and high elasticity melamine foam, can solve the problems that there is no effective method for controlling the length-to-diameter ratio, so as to reduce the apparent density and improve the toughness and elasticity , the effect of uniform pore size distribution

Inactive Publication Date: 2012-07-18
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only US4540717 mentions the influence of the length-to-diameter ratio of foam ribs on foam performance, but does not propose an effective method for controlling the length-to-diameter ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 100g of melamine formaldehyde resin with a viscosity of 1500cp, 1.5g of sodium dodecylsulfonate, 8g of pentane, 2.0g of dodecyl alcohol, and 5g of formic acid, adjust the speed to 1500 rpm, stir for 3 minutes, and put the mixture into Microwave foaming for 1 minute to obtain white foam. After curing at 200°C for 3 hours, the product has a compressive strength of 0.005MP, a rebound rate of 15%, and a tensile strength of 0.0652MP.

Embodiment 2

[0024] 100g of melamine formaldehyde resin with a viscosity of 800cp, 2.0g of sodium dodecyl sulfonate, 3g of silicone oil L-580, 5g of pentane, 5g of formic acid, stir until evenly mixed, put the mixture into a microwave oven for 30 seconds to foam, and obtain a white foam . After aging at 220°C for 3 hours, the obtained product has a density of 8g / L, a compressive strength of 0.015MP, a rebound rate of 23%, and a tensile strength of 0.0824MP.

Embodiment 3

[0026] 100g of modified melamine-formaldehyde resin with a viscosity of 2000cp, 2g of Op-10, 8g of n-hexane, 3g of silicone oil L-600, 5g of acetic acid, at a speed of 2000 rpm, after 120 seconds, put the mixture into a microwave oven for 90 seconds to foam to obtain a white The foam was aged at 180°C for 4 hours to obtain a product with a compressive strength of 0.046MP, a tensile strength of 0.0125MP, and a rebound rate of 47%.

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Abstract

The invention discloses a production method of ultralow density high-tenacity high-elasticity melamine foams, which comprises the following steps: using melamine formaldehyde resin or modified melamine formaldehyde resin as a base material, and adding an emulsifier, a foaming agent, a curing agent and molecules with an enhanced Marangoni effect; and after uniform emulsification, heating in a microwave oven, curing for a while, and molding. During the microwave foaming process, the addition of the molecules with an enhanced Marangoni effect not only can reduce the use amount of the foaming agent to a large extent, but also can regulate the aperture and the length-diameter ratio of edges of the foams in a large range, so as to greatly improve the various properties of melamine foams.

Description

technical field [0001] The invention discloses a production method of ultra-low density, high toughness and high elasticity melamine foam. Improve the toughness and elasticity by improving the structure of the foam, while reducing the density of the foam and reducing the amount of blowing agent. Background technique [0002] In recent years, with the development of society and the improvement of people's safety awareness, melamine formaldehyde foam with low density, low thermal conductivity, high flame retardancy, good sound insulation, acid and alkali resistance and dielectric properties has been developed rapidly. In addition, the residual free formaldehyde content of melamine formaldehyde foam is low, so its application range is wider and wider. [0003] The earliest research on melamine-formaldehyde foam was Germany's BASF company, and in 1982 it obtained the US patent US4334971. At the same time, many countries in the world have also begun to carry out research on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L61/28C08L61/32
Inventor 段洪东张玉森孟霞王兴建卜娟秦大伟
Owner QILU UNIV OF TECH
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