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Preparation method of melamine-formaldehyde resin foam

A technology of formaldehyde resin and melamine, which is applied in the field of microwave foaming, can solve the problems of high foam brittleness and easy powder drop, and achieve the effect of low brittleness, low powder drop, and high tensile tear strength

Inactive Publication Date: 2016-11-30
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

[0004] The invention provides a method for preparing melamine-formaldehyde resin foam, which solves the problems of the existing melamine-formaldehyde resin foam such as high brittleness, easy powder drop, and tensile tear strength

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] The present embodiment provides a kind of preparation method of melamine-formaldehyde resin foam, comprising the following steps: take 150 parts by weight of melamine-formaldehyde resin, add 8 parts by weight of foaming agent, 5 parts by weight of emulsifier, stabilizer of 5 parts by weight, 4 parts by weight of curing agent, mixed and stirred evenly, put into a microwave oven for foaming, the foaming temperature is 130°C, and the foaming time is 5 minutes; then put the foam into an oven for curing, the oven temperature is 210°C, 2 Cut to shape after hours.

[0018] The foaming agent in this embodiment is n-pentane, n-hexane and dichlorotetrafluoroethane in a weight ratio of 1:2:1.

[0019] In this example, the emulsifiers are sodium benzenesulfonate, sodium dodecylbenzenesulfonate, and OP-10 in a weight ratio of 2:1:2.

[0020] In this embodiment, the curing agent is formic acid or acetic acid.

[0021] The stabilizer in this embodiment is polysiloxane.

[0022] The...

Embodiment 2

[0024] The present embodiment provides a kind of preparation method of melamine-formaldehyde resin foam, comprising the following steps: take 120 parts by weight of melamine-formaldehyde resin, add 12 parts by weight of foaming agent, 3 parts by weight of emulsifier, stabilizer of 6 parts by weight, 2 parts by weight of curing agent, mixed and stirred evenly, put into a microwave oven for foaming, the foaming temperature is 160°C, and the foaming time is 2 minutes; then put the foam into an oven for curing, the oven temperature is 180°C, 2 Cut to shape after hours.

[0025] The foaming agent in this embodiment is n-hexane and dichlorotetrafluoroethane in a weight ratio of 2:1.

[0026] In this embodiment, the emulsifier is sodium benzenesulfonate and sodium dodecylbenzenesulfonate in a weight ratio of 1:2.

[0027] In this embodiment, the curing agent is formic acid.

[0028] The stabilizer in this embodiment is organotin.

[0029] The foam density of the melamine formaldeh...

Embodiment 3

[0031] The present embodiment provides a kind of preparation method of melamine-formaldehyde resin foam, comprising the following steps: take 180 parts by weight of melamine-formaldehyde resin, add 5 parts by weight of foaming agent, 6 parts by weight of emulsifier, stabilizer of 6 parts by weight, 2 parts by weight of curing agent, mixed and stirred evenly, put into a microwave oven for foaming, the foaming temperature is 100°C, and the foaming time is 6 minutes; then put the foam into an oven for curing, the oven temperature is 250°C, 2 Cut to shape after hours.

[0032] The blowing agent in this embodiment is n-pentane.

[0033] In this embodiment, the emulsifier is sodium benzenesulfonate by weight.

[0034] In this embodiment, the curing agent is acetic acid.

[0035] The stabilizer in this example is organic antimony.

[0036] The foam density of the melamine formaldehyde resin foam that present embodiment makes is 10kg / m , tensile strength ≥ 150KPa, elongation at bre...

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Abstract

The invention discloses a preparation method of melamine-formaldehyde resin foam, and belongs to the technical field of microwave foaming. The method comprises the following steps: taking 120-180 parts by weight of a melamine-formaldehyde resin; adding 5-12 parts by weight of a foaming agent, 3-6 parts by weight of an emulsifier, 3-6 parts by weight of a stabilizing agent, and 2-5 parts by weight of a curing agent in sequence, performing mixing and uniform stirring, and putting the obtained product in a microwave oven for foaming; and putting the obtained foam in an oven for curing for 2 h, wherein the temperature of the oven is 180-250 DEG C, and performing cutting molding. The melamine-formaldehyde resin foam is small in brittleness, not prone to shred particles, and high in tensile and tearing strength. The problem existing in the prior art is effectively solved, and the melamine-formaldehyde resin foam in excellent in mechanical property, flame retardance and sound attenuation.

Description

technical field [0001] The invention relates to the technical field of microwave foaming, in particular to a preparation method of melamine-formaldehyde resin foam. Background technique [0002] Melamine-formaldehyde 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 customary to call it amino resin together with urea-formaldehyde resin. [0003] Melamine foam is a kind of flame retardant foam plastic made by special foaming process based on melamine formaldehyde resin. An is light in texture, has excellent flame retardancy, heat insulation, thermal stability, sound absorption and noise reduction, safety and sanitation and good secondary processability, and can be widely used in construction, machinery, chemical industry, transportation and other fields. The curing of melamine formaldeh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L61/28
CPCC08J9/141C08J9/147C08J2203/14C08J2203/144C08J2203/182C08J2203/202C08J2361/28
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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