Composite material, moulding, electronic unit comprising moulding, and process for producing a moulding

A technology of composite materials and electronic devices, applied in measuring devices, chemical instruments and methods, measuring fluid pressure, etc., can solve problems such as unproven long-term use

Inactive Publication Date: 2013-06-12
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the described absorber has not proven to be satisfactory for long-term use, especially in case of temperature changes

Method used

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  • Composite material, moulding, electronic unit comprising moulding, and process for producing a moulding
  • Composite material, moulding, electronic unit comprising moulding, and process for producing a moulding
  • Composite material, moulding, electronic unit comprising moulding, and process for producing a moulding

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Embodiment Construction

[0033] As the zeolite in this embodiment, the zeolites Purmol 4ST (Z4A) or 3ST (Z3A) from the company Zeochem are chosen. Both zeolites are white powders that react with water in a highly exothermic manner under dry conditions. The water absorption of the powder Z4A at 50% relative humidity and 20° C. within 24 hours was 24% by mass. For powder Z3A, under the same conditions, the maximum water absorption rate was 22% by mass.

[0034] For the polymer used in the polymer matrix in this embodiment, PFA was used, which was used as the aqueous dispersion DuPont Teflon PFA TE-7224. The dispersion is 60.4% by mass of PFA nanoparticles (50-500nm), about 5% by mass of nonionic surfactant and water. The viscosity is about 20 cP. The pH was 10, which is perfectly adequate for the pH of the zeolite in water (pH 10.3). The dispersion is completely dried at 100-120°C; at 250-290°C the surfactant is pyrolyzed; at 305-340°C the PFA particles melt and form 3D crosslinks in the composite. ...

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PUM

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Abstract

A composite material comprises a polymer matrix; and zeolite bound within the polymer matrix; where the proportion by volume of the zeolite in the volume of the composite material is at least 50%, especially at least 65%. The polymer matrix may especially comprise a polymer selected from a group of polymers consisting of fluoropolymers, polyaryl ether ketones, sulphur polymers and polymers of high heat resistance. The zeolite comprises especially a type A zeolite, especially a 4A or 3A zeolite.

Description

technical field [0001] The invention relates to a composite material, a shaped body comprising such a composite material, an electronic device comprising such a shaped body, and a method for producing such a shaped body. Background technique [0002] Electronic devices often contain housings that are inherently designed in such a way that moisture in the form of water vapor can penetrate into the housing. Condensation of water vapor on circuit components inside the housing can lead to adverse effects or, as the case may be, cause a malfunction of the device. Therefore, long-term occurrence of this condition must be prevented. [0003] For this purpose, it is known to provide a moisture filter in the housing opening or to arrange an absorber in the housing. However, the described absorbers have not proven satisfactory for long-term use, especially in the event of temperature changes. It is therefore an object of the present invention to take corrective action at this point...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/26B01J20/28G01L13/00
CPCB01J20/28026C08K3/34G01L19/0654B01J20/183B01J20/2803B01J20/3007B01J20/28042G01D11/245
Inventor 谢尔盖·洛帕京托马斯·尤林亚历山大·古根伯格米夏埃尔·休格尔安德烈亚斯·罗斯伯格
Owner EHNDRESS KHAUZER GMBKH KO KG
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