INFRARED (IR)-REFLECTING COMPOSITION AND INFRARED (IR)-REFLECTING BUILDING MATERIALS

Abstract

The invention relates to an IR-reflecting composition that features a mixture of glass components selected from the group comprising hollow glass balls, full glass balls, hollow glass balls coated with silver, full glass balls coated with silver, hollow glass balls coated with aluminum and full glass balls coated with aluminum. The subject of the invention are further also construction materials which feature a coating that contains the IR-reflecting composition.

Claims

1. IR-reflecting composition, comprising: a mixture of glass systems selected from one or more of hollow glass balls, full glass balls, hollow glass balls coated with silver, full glass balls coated with silver, hollow glass balls coated with aluminum and full glass balls coated with aluminum, and with hollow glass balls or full glass balls coated with both metals, or mixtures of the above systems.

2. The IR-reflecting composition according to claim 1, wherein the composition contains a mixture of hollow glass balls, full glass balls, hollow glass balls coated with silver, full glass balls coated with silver, hollow glass balls coated with aluminum and full glass balls coated with aluminum.

3. The IR-reflecting composition according to claim 1, wherein the uncoated and coated hollow glass balls and full glass balls preferably feature a diameter of 10 to 200 m.

4. The IR-reflecting composition according to claim 1, wherein the IR-reflecting composition further contains comprises fillers, pigments and/or carrier materials.

5. The IR-reflecting composition according to claim 4, wherein the fillers, pigments and/or carrier materials include one or more of defoamers, binding agents, thickening agents, sheet silicates, titanium oxide, carbonates, silica gel, diatomite, silicates, amphiboles, talcum, kaolin, attaclay, cement, limestone, lime, chalk, loess, clay, dolomite, diatomaceous earth, attapulgite, montmorillonite, bentonite, volcanic ashes, mica, vermiculite, synthetic silicic acids, rice husk ash, amorphous glass structures, amorphous silicic acids and synthetic calcium silicates, aluminosilicates, biominerals (nacre) and anorganic color pigments.

6. The IR-reflecting composition according to claim 1, wherein the hollow glass balls and full glass balls coated with silver and/or aluminum make up a weight proportion of 1 to 75 weight % in relation to 100% of the mixture.

7. The IR-reflecting composition according to claim 1, containing 1 to 20 weight % hollow glass balls with a diameter of 1 to 90 m; 1 to 20 weight % hollow glass balls coated with silver and a diameter of 10 to 90 m; and 2 to 25 weight % Titanium dioxide as a filler.

8. The IR-reflecting composition according to claim 7, wherein the IR-reflecting composition contains 1 to 25 weight % calcium carbonate with a grading curve of 10 to 4,000 m as a filler.

9. The IR-reflecting composition according to claim 1, containing 12.5% hollow glass balls with a diameter of 0.5 to 50 m; 7.5% hollow glass balls coated with aluminum with a diameter of 0.5 to 50 m; 1.25% hollow glass balls coated with silver with a diameter of 0.5 to 50 m; 25% full glass balls with a diameter of 0.5 to 70 m; 7.5% full glass balls coated with aluminum with a diameter of 0.5 to 70 m; 3.5% full glass balls coated with silver with a diameter of 0.5 to 70 m; and 42.75% mica (0.5 to 200 m).

10. The IR-reflecting composition according to claim 1, containing 8.5% hollow glass balls with a diameter of 0.5 to 170 m; 12% hollow glass balls coated with aluminum with a diameter of 0.5 to 170 m; 5% hollow glass balls coated with silver with a diameter of 0.5 to 170 m; 35% full glass balls with a diameter of 0.5 to 150 m; 2.5% full glass balls coated with aluminum with a diameter of 0.5 to 150 m; 5.5% full glass balls coated with silver with a diameter of 0.5 to 150 m; 10% titanium oxide; and 21.5% mica (0.5 to 200 m).

11. An IR-reflecting construction material, wherein the construction material features a coating that contains the IR-reflecting composition of claim 1.

12. The IR-reflecting construction material according to claim 11, wherein the coating contains a binding system.

13. The IR-reflecting construction material according to claim 12, wherein the binding system contains binding agents based on acrylate, vinyl acetate or silicon resin, cement, gypsum, gypsum anhydride, a latent hydraulic binding agent, water glass, bitumen, clay, a ceramic binding agent or lignin and its derivatives.

14. The IR-reflecting construction material according to claim 11, wherein the construction materials are selected from one or more of calcium silicate panels, gypsum panels, insulation panels, XPS panels, hard foam panels, Promat panels, gypsum board construction panels GBP, eternit, LUX elements, plasterboard construction panels, KNAUF construction panels, Fermacell, Phonewall panels, KS construction panels, gypsum fiberboard panels, wood panels, wood fiber panels, impregnated gypsum board panels, panels, tiles, WEDI panels, acrylic glass panels, porous concrete panels, brick panels, cement-bonded construction panels, vermiculite panels and perlite panels, foam glass, panels based on regenerative materials (such as bulrush plants or sweet grasses ((poaceae)), bisulfite panels, noise-reducing panels, magnesia binders, asphalt, tar and bitumen.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0041] The one FIGURE shows the progress of the degree of reflection in % compared to the wavelength in the near IR range of an IR-reflective composition according to a variant of the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0042] The invention will be explained below in greater detail with reference to exemplary embodiments.

Example 1

[0043] Preferred composition, suitable in particular for applications to reflect the entire close IR range using gypsum board panels. It is composed of the following:

[0044] 10.5% hollow glass balls with a diameter of 1 to 90 m

[0045] 12% hollow glass balls with a diameter of 10 to 90 m, coated with silver

[0046] 5.5% full glass balls coated with silver

[0047] 13.8% mica

[0048] 0.5% dispersant (Ciba)

[0049] 0.5% Dehydran 1620 (Cognis)

[0050] 0.5% propylene carbonate (Merck)

[0051] 0.2% Walocel MKX 20000 PF 40 (Wolf Cellul. AG)

[0052] 0.5% Wallatrop S (Osthoff-Petrasch GmbH)

[0053] 14.5% Mowelith 1871

[0054] 20% titanium dioxide

[0055] 21.5% filler, e.g. calcium carbonate, with a grading curve of 10 to 4000 m.

Example 2

[0056] Preferred compositions that demonstrate a good reflection of the IR radiation in the A range of 780 to 1,400 nm and in the B range of 1,400 to 3,000 nm:

[0057] a) Composition 1:

[0058] 12.5% hollow glass balls with a diameter of 0.5 to 50 m

[0059] 7.5% hollow glass balls coated with aluminum

[0060] 25% full glass balls with a diameter of 0.5 to 70 m

[0061] 3.5% full glass balls coated with silver

[0062] 7.5% full glass balls coated with aluminum

[0063] 1.25% hollow glass balls coated with silver

[0064] 42.75% filler (mica with a diameter of 0.5 to 200 m).

[0065] When irradiated with IR light in wavelength ranges A, B and C, 91.5% of the wavelength

[0066] ranges IR-A and IR-B were reflected.

[0067] b) Composition 2:

[0068] 8.5% glass hollow balls with a diameter of 0.5 to 170 m

[0069] 12% hollow glass balls coated with aluminum

[0070] 5% hollow glass balls coated with silver

[0071] 35% full glass balls with a diameter of 0.5 to 150 m

[0072] 5.5% full glass balls coated with silver

[0073] 2.5% full glass balls coated with aluminum

[0074] 10% titanium dioxide

[0075] 21.5% filler (mica with a diameter of 0.5 to 200 m).

[0076] Composition 2 reflects the IR-A range up to 60% and the IR-B range up to 29%.

Example 3

[0077] A further IR-reflecting composition suitable for coating comprises a combination of the compositions according to Composition 1 and 2, wherein in Composition 3, 1:1 surplus is present.

Example 4

[0078] Standard composition for coating using the composition according to Example 3, which is composed as follows (data in weight %):

[0079] 26.6 water

[0080] 0.5 dispersant (Ciba)

[0081] 0.5 Dehydran 1620 (Cognis)

[0082] 0.5 Propylene carbonate (Merck)

[0083] 0.2 Walocel MKX 20000 PF 40 (Wolf Cellul. AG)

[0084] 0.5 Wollatrop S (Osthoff-Petrasch GmbH)

[0085] Omyacarb 2GU (Omya GmbH)

[0086] Omyacarb 5GU (Omya GmbH)

[0087] 4.7 titanium dioxide RDI-S (Kemira)

[0088] Mowilith 1871 (Celanese AG)

[0089] 21.5 composition according to Example 3

[0090] water for adjusting the viscosity.

[0091] The degree of reflection of this composition is shown in FIG. 1.

[0092] The measured wellbeing effect in rooms showed that the combination described of Compositions 1+2 demonstrated the greatest benefit for the room climate and for therapeutic purposes.