Composite Material, Molded Body, Electronic Device with Molded Body, and Method for Fabricating a Molded Body

• US 20130125647A1
• Filed: 07/11/2011
• Published: 05/23/2013
• Est. Priority Date: 08/05/2010
• Status: Active Grant

• Current Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Original Assignee: Endress + Hauser GmbH + Company KG (Endress+Hauser AG)
• Inventors: Lopatin, Sergej, Uehlin, Thomas, Hugel, Michael, Rossberg, Andreas, Gugenberger, Alexander
• Granted Patent: US 9,239,251 B2
• Time in Patent Office: Days
• US Class Current: 73/431
• CPC Class Codes: B01J 20/183 Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
• CPC Class Codes: B01J 20/28026 Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
• CPC Class Codes: B01J 20/2803 Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B01J 20/3007 Moulding, shaping or extruding
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01L 19/0654 against moisture or humidity

Abstract

A composite material comprises a polymer matrix; and zeolite, which is bonded in the polymer matrix; wherein the percent of volume of the zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%. The polymer matrix can in particular comprise a polymer, which is selected from a group of polymers that consist of fluoroplastics, polyaryletherketones, sulphur-containing polymers and high heat resistant polymers. The zeolite comprises in particular a zeolite of type A, in particular a zeolite 4A or 3A.

Claims

1-13. -13. (canceled)

14. A composite material, comprising:

a polymer matrix; and

zeolite, which is bonded in said polymer matrix, wherein;

the portion of volume of said zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%.

15. The composite material according to claim 14, wherein:

said polymer matrix comprises a polymer, which is selected from a group of polymers that consists of fluoroplastics, polyaryletherketones, sulphur-containing polymers and high heat resistant polymers.

16. The composite material according to claim 14, wherein:

said zeolite comprises a zeolite of type A, in particular a 4A or 3A zeolite.

17. The composite material according to claim 14, wherein:

the average density of the composite material, in a dry condition, amounts to not more than 1.7 g/cm³, in particular not more than 1.5 g/cm³.

18. The composite material according to claim 14, wherein:

the packing density of said zeolite in the composite material in a dry condition amounts to not less than 0.8 g/cm³, in particular not less than 1.0 g/cm³.

19. A molded body, comprising a composite material comprising:

a polymer matrix; and

zeolite, which is bonded in said polymer matrix, wherein;

the portion of volume of said zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%.

20. The molded body according to claim 19, wherein:

for the volume V_min of a minimal convex hull of the molded body and for the surface area A_min of the minimal convex hull, (V_min)^2/3/A_min>

1/20, in particular >

1/10, is true.

21. The molded body according to claim 20, wherein:

for the volume V_K of the molded body and for the surface area A_K of the molded body, (V_K)^2/3/A_K>

1/30, in particular >

1/20, and preferably >

1/15, is true.

22. An electronic device, in particular a measurement device, which comprises:

at least one housing; and

at least one inner space, which contain an electronic circuit, wherein the device comprises at least one gas line, via which water vapor can enter into said at least one housing; and

the device comprises at least one molded body comprising;

a polymer matrix; and

zeolite, which is bonded in said polymer matrix, wherein;

the portion of volume of said zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%.

23. The electronic device according to claim 22, wherein:

the molded body is arranged in the inner space.

24. The electronic device according to claim 22, wherein:

the device comprises a gauge pressure sensor for measuring the difference between a pressure of a medium and an ambient atmospheric pressure near the sensor; and

the device comprises an atmospheric pressure line in order to expose the pressure sensor to the atmospheric pressure, wherein the atmospheric pressure line runs, in particular, through the molded body.

25. The electronic device according to claim 22, wherein:

the volume of the molded body amounts to not less than 20%, preferably not less than 40% and particularly preferably not less than 60% of the free volume of the inner space.

26. A method for fabricating a molded body, comprising:

a molded body, comprising a composite material comprising;

a polymer matrix; and

zeolite, which is bonded in said polymer matrix, wherein;

the portion of volume of said zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%, comprising the steps of;

fabricating a dispersion, which contains particles of a polymer for forming a polymer matrix and which contains zeolite; and

molding out of the dispersion; and

hardening the molded body.