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Preparation method of melamine resin foam

A technology of melamine resin and foam, which is applied in the field of preparation of melamine resin foam, which can solve the problems of high brittleness and easy powder drop, and achieve the effects of low brittleness, low powder drop, and good flame-retardant and sound-absorbing performance

Inactive 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

[0004] The invention provides a preparation method of melamine 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
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment provides a kind of preparation method of melamine resin foam, comprises the following steps:

[0026] (1) Mixing: get 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, and curing agent of 4 parts by weight, mix and stir evenly;

[0027] (2) Pre-foaming: put it into a pre-foaming microwave oven for pre-foaming, and the pre-foaming time is 2 minutes;

[0028] (3) Foaming: transport it to a microwave oven for foaming, and the foaming time is 5 minutes;

[0029] (4) Curing and cutting: then put the foam into an oven for curing, the temperature of the oven is 210°C, and cut into shape after 2 hours.

[0030] Wherein, the microwave frequency in the pre-foaming microwave oven is 2450MHz or 915MHz; two rows of microwave sources are respectively arranged on the top wall and the bottom wall of the pre-foaming microwave oven, each row has 5 microwave ...

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of melamine resin foam, comprises the following steps:

[0039] (1) Mixing: get 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, and curing agent of 2 parts by weight, mix and stir evenly;

[0040] (2) Pre-foaming: put it into a pre-foaming microwave oven for pre-foaming, and the pre-foaming time is 1 minute;

[0041] (3) Foaming: transport it to a microwave oven for foaming, and the foaming time is 10 minutes;

[0042] (4) Curing and cutting: then put the foam into an oven for curing, the temperature of the oven is 180°C, and cut into shape after 2 hours.

[0043] Wherein, the microwave frequency in the pre-foaming microwave oven is 2450MHz or 915MHz; two rows of microwave sources are respectively arranged on the top wall and the bottom wall of the pre-foaming microwave oven, each row has 5 microwave...

Embodiment 3

[0051] The present embodiment provides a kind of preparation method of melamine resin foam, comprises the following steps:

[0052] (1) Mixing: get 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, and curing agent of 2 parts by weight, mix and stir evenly;

[0053] (2) Pre-foaming: put it into a pre-foaming microwave oven for pre-foaming, and the pre-foaming time is 3 minutes;

[0054] (3) Foaming: transport it to a microwave oven for foaming, and the foaming time is 2 minutes;

[0055] (4) Curing and cutting: Then put the foam into an oven for curing, the temperature of the oven is 250°C, and cut into shape after 2 hours.

[0056] Wherein, the microwave frequency in the pre-foaming microwave oven is 2450MHz or 915MHz; two rows of microwave sources are respectively arranged on the top wall and the bottom wall of the pre-foaming microwave oven, each row has 5 microwave ...

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Abstract

The invention discloses a preparation method of melamine resin foam, and belongs to the technical field of microwave foaming. The steps of the preparation method includes mixing the material: by weight, taking 120-180 parts of melamine formaldehyde resin, in sequence adding 5-12 parts of foaming agent, 3-6 parts of emulsifier, 3-6 parts of stabilizer, 2-5 parts of curing agent, mixing then stirring evenly; pre-frothing: putting the mixture into the pre-frothing microwave oven to pre-froth, the duration for pre-frothing is 1-3 minutes; frothing: transferring the mixture into the microwave oven again to froth, the duration for frothing is 2-10 minutes; curing and cutting: then putting the foam into a baking oven to cure, keeping the oven temperature at 180-250 DEG C, after two hours cutting the foam into desired shape. The melamine resin foam is small in brittleness; the powder does not easily come off, the foam has high stretching and tearing intensity. The preparation method provides an effectively solution to problems present in existing technology, and equips melamine formaldehyde resin foam with excellent mechanical property and flame retardation and noise reduction property.

Description

technical field [0001] The invention relates to the technical field of microwave foaming, in particular to a preparation method of melamine resin foam. 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 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 formaldehyde resin is through inter...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L61/28B29C44/34
CPCC08J9/141B29C44/34B29C44/3415C08J9/147C08J9/149C08J2203/14C08J2203/142C08J2203/182C08J2203/202C08J2205/05C08J2361/28C08L2201/02C08L2203/14
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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