Dimming window assembly and preparation method

Abstract

The invention provides a dimming window assembly which comprises window glass (1), an adhesive (2), an adhesive film (3), an adhesive (4) and dimming glass (5), a cavity (6) is defined by the inner side of the window glass (1), the adhesive (2), the adhesive film (3), the adhesive (4) and the dimming glass (5), and the cavity (6) is filled with nano SiO2 aerogel particles or / and inert gas. Transparent glass on an existing vehicle window and an existing building window can be subjected to after-installation transformation, and therefore the functions of dimming, heat insulation, energy saving, displaying and the like of the existing window are achieved.

Description

Technical Field

[0001] The present invention relates to the field of electronic light-controlling materials, and in particular to a dimming window assembly and a preparation method thereof. Background Art

[0002] A dimming film is an electronic light-control device that essentially places a light-control layer between two layers of transparent conductive film. When an electric field is applied, the arrangement or state of the materials in the light-control layer changes, thereby altering the device's light transmission characteristics, such as switching from low transmittance to high transmittance, or vice versa. Through the action of the electric field, rapid switching between on and off states can be achieved. Depending on the light-control mechanism of the light-control layer, dimming films can be categorized as suspended particle dimming films, polymer dispersed liquid crystal dimming films, and electrochemical reaction dimming films.

[0003] Smart glass mainly sets a smart film between two layers of transparent glass.

[0004] Dimming interior spaces can serve numerous functions, including adjusting light, protecting privacy, displaying content, and providing environmental protection and sound insulation. These functions can be easily achieved by retrofitting standard glass in existing vehicles or buildings.

[0005] The purpose of this application is to provide a solution for retrofitting dimming glass to existing standard glass in vehicles and buildings, thereby enhancing its dimming function. The dimming window assembly of the present invention is lightweight and easy to construct, while achieving excellent thermal insulation, dimming performance, and stable, long-lasting technical effects. Summary of the Invention

[0006] The inventors have developed a retrofittable dimming window assembly that can add dimming functionality to standard glass in existing vehicle and building windows. This assembly achieves numerous functions, including light adjustment, privacy protection, content display, environmental protection, and sound insulation, without disrupting the existing window structure, and does so with stability and durability.

[0007] A first aspect of the present invention provides a dimming window assembly, comprising window glass (1), adhesive (2), adhesive film (3), adhesive (4) and dimming glass (5), wherein a cavity (6) is formed by the inner side of the window glass (1), the adhesive (2), the adhesive film (3), the adhesive (4) and the dimming glass (5), and the cavity (6) is filled with nano-SiO2 aerogel particles and / or an inert gas.

[0008] Furthermore, the adhesive (2) and the adhesive (4) are formed by curing a precursor glue.

[0009] Furthermore, the curing is performed by subjecting the precursor glue to at least one of UV curing and thermal curing to form the adhesive (2) and / or the adhesive (4).

[0010] Furthermore, the precursor glue contains UV-curable or heat-curable functional groups.

[0011] Furthermore, the precursor glue contains at least one of an unsaturated double bond functional group and an epoxy functional group.

[0012] Furthermore, the adhesive film (3) is selected from at least one of PVB, EVA, TPU, TPO and SGP adhesive films.

[0013] Furthermore, the width of the adhesive film (3) is 5 to 50 mm.

[0014] Furthermore, the dimming glass (5) comprises a first transparent thin sheet (5-1), a second transparent thin sheet (5-2), and a dimming film (5-3) arranged between the first transparent thin sheet (5-1) and the second transparent thin sheet (5-2); a first interlayer (5-4) is arranged between the first transparent thin sheet (5-1) and the dimming film (5-3), and a second interlayer (5-5) is arranged between the second transparent thin sheet (5-2) and the dimming film (5-1).

[0015] In some embodiments, the switchable glass (5) has a pattern display effect.

[0016] In some embodiments, the switchable glass (5) has a gradient display effect.

[0017] In some embodiments, the switchable glass (5) has butyl rubber sealing strips around its periphery.

[0018] In some embodiments, the dimming glass (5) has a screen-printed frame with a width of 1 to 4 cm around it.

[0019] Furthermore, the first transparent sheet (5-1) and the second transparent sheet (5-2) are each independently selected from at least one of an ultra-thin transparent glass sheet and a transparent plastic sheet.

[0020] Furthermore, the thickness of the first transparent sheet (5-1) and the second transparent sheet (5-2) is between 0.1 and 0.5 mm.

[0021] In some embodiments, the first transparent sheet (5-1) and / or the second transparent sheet (5-2) is provided with an infrared reflective coating.

[0022] In some embodiments, the infrared reflective coating is at least one of nano-titanium dioxide or nano-silver.

[0023] Furthermore, the transparent plastic sheet is selected from at least one of PET, PMMA and PC sheets.

[0024] Furthermore, a hardening coating is provided on the surface of the transparent plastic sheet.

[0025] Furthermore, the pencil hardness of the hardened coating is greater than or equal to 4H.

[0026] Furthermore, the pencil hardness of the hardened coating is 4H to 10H.

[0027] Furthermore, the hardened coating has a thickness of 10 to 40 μm.

[0028] Furthermore, the hardened coating comprises silicon dioxide.

[0029] Furthermore, the dimming film (5-3) is selected from at least one of a suspended particle dimming film, an electrochromic dimming film and a polymer dispersed liquid crystal dimming film.

[0030] Furthermore, the window glass (1) and the dimming glass (5) have similar outer contours.

[0031] Furthermore, the similarity in the outer contours means that the window glass (1) has a certain arch height shape, and the arch height parameters of the dimming glass (5) are substantially consistent with the arch height parameters of the window glass (1).

[0032] Furthermore, the pressure of the cavity (6) is between 0.5 and 1.5 atm.

[0033] Furthermore, the cavity (6) is cooled / heated by an air-conditioning system.

[0034] Furthermore, the cavity (6) is cooled / heated by a vehicle air-conditioning system.

[0035] Furthermore, the density of the nano-SiO2 aerogel particles is 0.08-0.12 g / cm 3 The transmittance is greater than or equal to 80%.

[0036] Furthermore, the inert gas is at least one of argon and nitrogen.

[0037] The second aspect of the present invention provides a method for preparing a dimming window assembly, comprising the following steps: using existing window glass as window glass (1), applying a precursor glue of an adhesive (2) to the inner edge portion or the inner profile frame of the window, adhering a film (3) to the precursor glue of the adhesive (2), and then applying a precursor glue of an adhesive (4) to the other side of the film (3), and then adhering a dimming glass (5) to the precursor glue of the adhesive (4) and curing the adhesive to obtain the result.

[0038] In some embodiments, a method for preparing a rear-mounted dimming window assembly includes the following steps: using existing window glass as window glass (1), applying a precursor glue of an adhesive (2) to the inner edge portion or the inner profile frame of the window, adhering a film (3) to the precursor glue of the adhesive (2), curing the precursor glue of the adhesive (2), and then applying a precursor glue (4) of an adhesive (4) to the other side of the film (3), and then adhering a dimming glass (5) to the precursor glue of the adhesive (4), and finally curing the precursor glue of the adhesive (4) to obtain the result.

[0039] Furthermore, the curing is performed by subjecting the precursor glue to at least one of UV curing and thermal curing to form the adhesive (2) and / or the adhesive (4).

[0040] Furthermore, the precursor glue contains UV-curable or heat-curable functional groups.

[0041] Furthermore, the precursor glue contains at least one of an unsaturated double bond functional group and an epoxy functional group.

[0042] A third aspect of the present invention provides an application of the aforementioned dimming window assembly in vehicle windows and building windows.

[0043] This invention provides a dimming window assembly based on existing ordinary glass, enhancing the dimming, energy-saving, and display functions of existing transparent glass in vehicle and building windows. The incorporation of nano-SiO2 aerogel particles and an inert gas significantly improves the seismic stability of the dimming window assembly, enhancing the dimming performance of buildings in windy conditions and vehicles subjected to long periods of turbulence. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are merely embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive effort.

[0045] Figure 1 is a schematic cross-sectional view of a dimming window assembly according to an embodiment of the present invention;

[0046] Figure 2 is a schematic cross-sectional view of the switchable glass according to an embodiment of the present invention;

[0047] Among them, 1 is window glass, 2 is adhesive, 3 is film, 4 is adhesive, 5 is dimming glass, 5-1 is first transparent sheet, 5-2 is second transparent sheet, 5-3 is dimming film, 5-4 is first interlayer, 5-5 is second interlayer, 6 is cavity. DETAILED DESCRIPTION

[0048] The present invention provides a simple and easy-to-operate dimming window assembly, which can provide dimming, energy saving, display and other functions to the window glass of existing buildings or vehicles, and has the characteristics of stable working performance, light weight and low cost.

[0049] In the present invention, the concepts of the first transparent sheet, the second transparent sheet, the first interlayer, and the second interlayer merely indicate the relative relationship between the two, and are not restrictive conditions. They do not necessarily have to be first and second, but may also be up, down, front, back, left, right, and other directional relationships.

[0050] In order to better illustrate the present invention, the following specific examples are provided.

[0051] Example 1: Building rear-mounted dimming window assembly

[0052] A first transparent sheet, a first interlayer, a suspended particle dimming film, a second interlayer, and a second transparent sheet are stacked in sequence and then laminated in an autoclave at 110° C. and 1.0 MPa to obtain a dimming glass; wherein the first transparent sheet and the second transparent sheet are PC sheets, each having a thickness of 0.2 mm and a surface containing a silica hardening coating having a pencil hardness of 6H; and the first interlayer and the second interlayer are TPU films;

[0053] The glass on the existing building window is used as the window glass. The acrylic modified polyurethane glue is applied to the aluminum profile frame inside the window using a dispensing machine. The PVB film is adhered to the glue. The acrylic modified polyurethane glue is also applied to the other side of the PVB film using a dispensing machine. The aforementioned dimming glass that matches the size of the aluminum profile frame is adhered to the acrylic modified polyurethane glue. The glue area is exposed to UV light for curing. The UV light intensity is 2000W / m 2 , curing time 60s;

[0054] There are holes on the edge of the PVB film, and the cavity is evacuated to 0.01atm by vacuum equipment;

[0055] The cavity is filled with a density of 0.09 g / cm 3 , nano-SiO2 aerogel particles with a transmittance of 88%, and then filled with argon gas until the cavity pressure reaches 0.85atm to produce a post-installed dimming window assembly.

[0056] Example 2: Automobile rear-mounted dimming skylight assembly

[0057] A first transparent sheet, a first interlayer, a suspended particle dimming film, a second interlayer, and a second transparent sheet are stacked in sequence and then laminated in an autoclave at 110° C. and 1.0 MPa to obtain a dimming glass; wherein the first transparent sheet and the second transparent sheet are PET sheets having a thickness of 0.25 mm and a surface containing a silica hardening coating having a pencil hardness of 6H; and the first interlayer and the second interlayer are EVA films;

[0058] The glass on the existing car sunroof is used as the window glass. A two-component epoxy glue is applied to a 1cm wide area along the inner edge of the window glass using a glue dispenser. PVB film is adhered to the glue. After curing at room temperature, acrylic modified polyurethane glue is applied to the other side of the PVB film using the same glue dispenser. The aforementioned dimming glass that matches the size of the car sunroof is adhered to the acrylic modified polyurethane glue. The glued area is exposed to a UV lamp for curing at an intensity of 2000W / m 2 , curing time 60s;

[0059] There are holes on the edge of the PVB film, and the cavity is evacuated to 0.01atm by vacuum equipment;

[0060] The cavity is filled with a density of 0.10 g / cm 3 , nano-SiO2 aerogel particles with a light transmittance of 86%, and then filled with nitrogen until the cavity pressure reaches 1.15atm to produce a car rear-mounted dimming skylight component;

[0061] The thermal insulation performance of the after-installed dimming skylight assembly of the automobile was tested. Two cars of the same model were measured at the same time, one of which was an original skylight (without dimming function) and the other was equipped with the aforementioned after-installed dimming skylight assembly. The two cars were exposed to the sun for 1 hour. The temperature inside the car equipped with the aforementioned after-installed dimming skylight assembly was 9°C lower than that of the car with the original skylight, indicating that the dimming and heat insulation function of the after-installed dimming skylight assembly is effective.

[0062] The above embodiments are intended only to facilitate understanding of the methods and core concepts of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A dimming window assembly, characterized in that: The invention comprises window glass (1), adhesive (2), adhesive film (3), adhesive (4) and dimming glass (5), wherein a cavity (6) is formed by the inner side of the window glass (1), the adhesive (2), the adhesive film (3), the adhesive (4) and the dimming glass (5), and the cavity (6) is filled with nano-SiO2 aerogel particles and / or an inert gas.

2. The dimming window assembly according to claim 1, characterized in that: The adhesive (2) and the adhesive (4) are formed by curing the precursor glue.

3. The dimming window assembly according to claim 1, characterized in that: The adhesive film (3) is selected from at least one of PVB, EVA, TPU, TPO and SGP adhesive films.

4. The dimming window assembly according to claim 1, characterized in that: The switchable glass (5) comprises a first transparent sheet (5-1), a second transparent sheet (5-2), and a switchable film (5-3) arranged between the first transparent sheet (5-1) and the second transparent sheet (5-2); a first interlayer (5-4) is arranged between the first transparent sheet (5-1) and the switchable film (5-3), and a second interlayer (5-5) is arranged between the second transparent sheet (5-2) and the switchable film (5-3).

5. The dimming window assembly according to claim 4, characterized in that: The first transparent sheet (5-1) and the second transparent sheet (5-2) are each independently selected from at least one of an ultra-thin transparent glass sheet and a transparent plastic sheet.

6. The dimming window assembly according to claim 4, characterized in that: The thickness of the first transparent sheet (5-1) and the second transparent sheet (5-2) is between 0.1 and 0.5 mm.

7. The dimming window assembly according to claim 5, characterized in that: The transparent plastic sheet is selected from at least one of PET, PMMA and PC sheets.

8. The dimming window assembly according to claim 5, characterized in that: The surface of the transparent plastic sheet is provided with a hardening coating.

9. The dimming window assembly according to claim 8, characterized in that: The pencil hardness of the hardened coating is greater than or equal to 4H.

10. The dimming window assembly according to claim 8, characterized in that: The hardened coating has a thickness of 10 to 40 μm.

11. The dimming window assembly according to claim 8, characterized in that: The hard coating includes silicon dioxide.

12. The dimming window assembly according to claim 4, characterized in that: The dimming film (5-3) is selected from at least one of a suspended particle dimming film, an electrochromic dimming film and a polymer dispersed liquid crystal dimming film.

13. The dimming window assembly according to claim 1, characterized in that: The window glass (1) and the dimming glass (5) have similar outer contours.

14. The dimming window assembly according to claim 1, characterized in that: The pressure of the cavity (6) is between 0.5 and 1.5 atm.

15. The dimming window assembly according to claim 1, characterized in that: The cavity (6) is cooled / heated by an air conditioning system.

16. The dimming window assembly according to claim 1, characterized in that: The density of the nano-SiO2 aerogel particles is 0.08-0.12 g / cm 3 The transmittance is greater than or equal to 80%.

17. The dimming window assembly according to claim 1, characterized in that: The inert gas is at least one of argon and nitrogen.

18. A method for preparing a dimming window assembly, characterized in that: The following steps are involved: The existing window glass is used as the window glass (1), and a precursor glue of the adhesive (2) is applied to the inner edge portion or the inner profile frame of the window, and then a film (3) is adhered to the precursor glue of the adhesive (2), and then a precursor glue of the adhesive (4) is applied to the other side of the film (3), and then a dimming glass (5) is adhered to the precursor glue of the adhesive (4) and cured.

19. The method for preparing the dimming window assembly according to claim 18, characterized in that: The curing is to form adhesive (2) and / or adhesive (4) by UV curing or thermal curing of the precursor glue.

20. Use of the dimming window assembly according to any one of claims 1 to 17 and the dimming window assembly prepared by the preparation method according to any one of claims 18 to 19 in vehicle windows and building windows.

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