Preparation method of electromagnetic shielding polystyrene foam

A polystyrene foam and electromagnetic shielding technology, which is applied in the field of preparation of special foams, can solve the problems of high cost, low electromagnetic shielding efficiency, poor electromagnetic radiation resistance, etc., and achieves anti-charge accumulation, good electromagnetic shielding performance and low price. Effect

Inactive Publication Date: 2019-01-25
德清舒华泡沫座椅有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low electromagnetic shielding efficiency, poor anti-electromagnetic radiation ability and high cost of foamed plastics in the prior art, and provides a low-cost foam plastic that can effectively improve its anti-electromagnetic radiation ability. A kind of preparation method of electromagnetic shielding polystyrene foam

Method used

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  • Preparation method of electromagnetic shielding polystyrene foam

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of electromagnetic shielding polystyrene foam, the preparation method includes the following steps:

[0030] (1) Nano lead tungstate silica gel: Weigh 10 parts of methyl phenyl dimethoxy silane, 30 parts of methyl trimethoxy silane and 80 parts of n-butyl acetate at room temperature in parts by weight. In the reactor, after stirring evenly, add 0.5 part of hydrochloric acid with pH 1 to it and stir at room temperature for 15 minutes, continue to add 15 parts of nano-lead tungstate powder and stir evenly, add 20 parts of water to it, heat and reflux for 40 minutes, and complete the reaction , Remove water and other small molecules under reduced pressure to obtain nano-lead tungstate silica gel;

[0031] (2) Preparation of silane-modified carboxymethyl starch: weigh 100 parts of carboxymethyl starch in parts by weight and add it to 200 parts of absolute ethanol, stir well, add 100 parts of distilled water and 0.5 parts of glacial acetic acid, then liters ...

Embodiment 2

[0036] A preparation method of electromagnetic shielding polystyrene foam, the preparation method includes the following steps:

[0037] (1) Nano lead tungstate silica gel: Weigh 10 parts of methyl phenyl dimethoxy silane, 45 parts of methyl trimethoxy silane and 100 parts of n-butyl acetate at room temperature according to parts by weight In the reactor, after stirring, add 3 parts of hydrochloric acid with pH 1 and stir for 30 minutes at room temperature, continue to add 20 parts of nano-lead tungstate powder and stir evenly, add 35 parts of water to it, heat and reflux for 120 minutes to complete the reaction , Remove water and other small molecules under reduced pressure to obtain nano-lead tungstate silica gel;

[0038] (2) Preparation of silane-modified carboxymethyl starch: Weigh 100 parts of carboxymethyl starch in parts by weight and add it to 200 parts of absolute ethanol, stir well, add 100 parts of distilled water and 3 parts of glacial acetic acid, then liters High te...

Embodiment 3

[0043] A preparation method of electromagnetic shielding polystyrene foam, the preparation method includes the following steps:

[0044] (1) Nano-lead tungstate silica gel: Weigh 10 parts of methyl phenyl dimethoxy silane, 35 parts of methyl trimethoxy silane and 85 parts of n-butyl acetate at room temperature according to parts by weight. In the reaction kettle, after stirring evenly, add 2 parts of hydrochloric acid with pH 1 to it and stir at room temperature for 20 minutes, continue to add 18 parts of nano-lead tungstate powder and stir evenly, add 25 parts of water to it, heat and reflux for 60 minutes to complete the reaction , Remove water and other small molecules under reduced pressure to obtain nano-lead tungstate silica gel;

[0045] (2) Preparation of silane-modified carboxymethyl starch: Weigh 100 parts of carboxymethyl starch in parts by weight and add it to 200 parts of absolute ethanol, stir well, add 100 parts of distilled water and 3 parts of glacial acetic acid, ...

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Abstract

The invention relates to the field of preparation methods of special foam, in particular to a preparation method of electromagnetic shielding polystyrene foam. The preparation method comprises the following steps of (1) nanometer lead tungstate silica gel preparation, (2) preparation of silane modified carboxymethyl starch, (3) blending, (4) prefoaming, (5) ageing and the like, so that the electromagnetic shielding polystyrene foam is obtained. By means of the preparation method of the electromagnetic shielding polystyrene foam, the problems that in the prior art that , foam plastic is low inelectromagnetic shielding efficiency, poor in anti-electromagnetic radiation capability and high in cost are solved, therefore, the preparation method of the electromagnetic shielding polystyrene foamhas the following beneficial effects that the obtained electromagnetic shielding polystyrene foam has good electromagnetic shielding performance; the raw materials are simple and cheap; the electromagnetic shielding polystyrene foam has the characteristic of preventing charge accumulation, so that static is effectively prevented; a the flame retarding effect is excellent.

Description

Technical field [0001] The invention relates to a method for preparing special foam, in particular to a method for preparing electromagnetic shielding polystyrene foam. Background technique [0002] Polystyrene foam is made of polystyrene resin as the main body, adding foaming agent and other additives. It is currently the most used cushioning material. It has a closed cell structure, low water absorption, and excellent water resistance; low density, generally 0.015~0.03; good mechanical strength, excellent cushioning performance; good processability, easy to mold; good coloring, strong temperature adaptability , Excellent radioactivity resistance, high dimensional accuracy and uniform structure. [0003] At present, many precision instruments need foam materials to wrap them during transportation, so as to effectively avoid the buffering effect of mechanical vibration on them. However, some precision instruments need to be protected not only from vibration and shock, but also to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L3/08C08L83/04C08K3/24C08K3/04C08K3/08C08K5/3492C08K3/32C08J9/14
CPCC08J9/0028C08J9/0061C08J9/0066C08J9/141C08J2203/14C08J2325/06C08J2403/08C08J2483/04C08K3/042C08K3/24C08K5/34922C08K2003/0856C08K2003/323C08K2201/011
Inventor 卢伟蔡盼盼
Owner 德清舒华泡沫座椅有限公司
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