Electrically-controlled composite dimming film and preparation method and application thereof

Abstract

The invention provides an electric control composite dimming film and a preparation method and application thereof. The electric control composite dimming film comprises a water sticker adhesive film and an electric control dimming film, the water sticker adhesive film comprises components capable of being cured by moisture. The adhesive film attached to the electrically-controlled composite dimming film provided by the invention only needs a layer of structure (a water adhesive film); the electric control composite dimming thin film can be pasted on the surface of glass in a water pasting mode, and after water pasting operation is completed, water left between the water pasting adhesive film and the glass reacts with moisture curing components in the water pasting adhesive film to be consumed completely, and the water cannot permeate into a dimming medium layer of the electric control dimming thin film. By using the electronic control composite dimming film, the construction speed of glass film pasting reconstruction projects of buildings, automobiles and other traffic carriers can be greatly increased, and the film pasting quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of projection display and applications, and relates to an electrically controlled composite dimming film, a preparation method thereof, and an application thereof. Background Art

[0002] Electrically controlled dimming films are widely used in building glass and glass for vehicles such as automobiles. One of its main application methods is to attach the electrically controlled dimming film to the glass surface. The specific method is as follows: A layer of adhesive film is pre-attached to one side surface of the film; after the glass surface is cleaned, the adhesive side of the electrically controlled dimming film is attached to the glass.

[0003] Different from common products such as heat insulation films and solar films widely used in buildings and automobiles, the electrically controlled dimming film attached to glass generally cannot be operated by the water-attaching method. The advantage of the water-attaching method is that it is convenient for precise alignment after the film is attached to the glass surface and it is not easy to leave dust residues; however, even with very good tools, the water between the film and the glass cannot be completely scraped off by the water-attaching method. A small amount of residual water will penetrate through the polyester film layer that makes up the electrically controlled dimming film and enter the dimming functional medium, damaging the electrical properties of the dimming functional medium. In severe cases, the electrically controlled dimming film will burn out when powered on. Therefore, for the application of the electrically controlled dimming film, the silicone static electricity film attachment method is generally adopted, and the film attachment operation must be carried out under dry conditions. Its adhesive layer has a three-layer structure. One side is an acrylic adhesive layer for closely adhering to the electrically controlled dimming film; the middle layer is an ultra-thin PET substrate for support, and the other side is a silicone layer for adhering to the glass. The dry attachment construction process is very likely to introduce dust particles, and the alignment of the film and the glass is very troublesome. In addition, the static adsorption force of silicone is limited, and there is a risk of peeling off after a long time.

[0004] Therefore, in this field, it is desirable to develop an electrically controlled composite dimming film that can be attached to glass by the water-attaching method. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an electrically controlled composite dimming film, a preparation method thereof, and an application thereof.

[0006] To achieve the purpose of this invention, the following technical solutions are adopted in the present invention:

[0007] In the first aspect, the present invention provides an electrically controlled composite dimming film, which comprises a water-attaching adhesive film and an electrically controlled dimming film;

[0008] The water-attaching adhesive film contains components that can be cured by moisture.

[0009] The adhesive film attached to the electro-control composite dimming film provided by the present invention only requires one layer of structure (water-attached adhesive film); the electro-control composite dimming film can be attached to the glass surface by the water-attached method. After the water-attached operation is completed, the moisture remaining between the water-attached adhesive film and the glass reacts and is exhausted with the moisture-curable components in the water-attached adhesive film, and cannot penetrate into the dimming medium layer of the electro-control dimming film. Using the electro-control dimming film of the present invention can greatly improve the construction speed of the glass film renovation projects of buildings, automobiles and other transportation vehicles, and improve the film attachment quality.

[0010] Preferably, the moisture-curable component includes any one or a combination of at least two of an isocyanate group, an alkyloxysilyl group, and a ketoxime-based silyl group.

[0011] Preferably, the raw materials for preparing the water-attached adhesive film include the following components by weight:

[0012] Resin: 1-35 parts;

[0013] Monomer: 6-55 parts;

[0014] Initiator: 0.1-3 parts.

[0015] Preferably, when the raw materials for preparing the water-attached adhesive film are calculated by weight, the amount of the resin can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 35 parts, etc.

[0016] Preferably, when the raw materials for preparing the water-attached adhesive film are calculated by weight, the amount of the monomer can be 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts, 55 parts, etc.

[0017] Preferably, when the raw materials for preparing the water-attached adhesive film are calculated by weight, the amount of the initiator can be 0.1 part, 0.3 part, 0.5 part, 0.8 part, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, etc.

[0018] Preferably, the resin includes any one or a combination of at least two of an acrylate polymer, a polyurethane acrylate polymer, a modified polyurethane acrylate polymer, a polyurethane polymer, a vinyl polymer, a polyurea polymer, a polyether polymer, a vinyl-vinyl acetate copolymer, and a silicone polymer.

[0019] Preferably, the resin includes, but is not limited to, any one or a composition of at least two of CN9001 NS, CN8888 NS, and CN8898 NS.

[0020] Preferably, the monomer includes a moisture-curable monomer.

[0021] Preferably, the moisture-curable monomer includes any one or a combination of at least two of KH570, 2-pentanone oxime silane, and KH550.

[0022] Preferably, the monomer further includes other monomers.

[0023] Preferably, the other monomers include any one or a combination of at least two of acrylate, methacrylate, poly dimethyl siloxane acrylate, poly dimethyl siloxane polyacrylate, acrylate modified poly dimethyl siloxane, and polyacrylate modified poly dimethyl siloxane.

[0024] Preferably, the other monomers include, but are not limited to, any one or a combination of at least two of SR420, SR502, SR601, and SR395.

[0025] Preferably, the monomer includes 1-15 parts (such as 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 15 parts, etc.) of moisture-curable monomer and 5-40 parts (such as 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, etc.) of other monomers.

[0026] Preferably, the initiator includes any one or a combination of at least two of Irgacure TPO, Irgacure 184, Irgacure 819, Irgacure754, and azobisisobutyronitrile (AIBN).

[0027] Preferably, the thickness of the water sticker film is 5-50 microns, such as 5 microns, 8 microns, 10 microns, 13 microns, 15 microns, 18 microns, 20 microns, 23 microns, 25 microns, 28 microns, 30 microns, 33 microns, 35 microns, 38 microns, 40 microns, 43 microns, 45 microns, 48 microns, 50 microns, etc.

[0028] Preferably, the electro - controlled dimming film includes, but is not limited to, any one or a combination of at least two of polymer - dispersed liquid crystal film, dye - doped polymer - dispersed liquid crystal film, nanoparticle - doped polymer - dispersed liquid crystal film, suspended - dispersed nanoparticle film, polymer - dispersed suspended - dispersed nanoparticle film, and electrochromic film. The electro - controlled dimming film of the present invention can be directly purchased or prepared by conventional methods in the prior art.

[0029] Preferably, the electro - controlled dimming film includes a first transparent conductive film, a dimming functional medium layer, and a second transparent conductive film that are sequentially stacked.

[0030] It should be noted that there is no substantial difference between the first transparent conductive film and the second transparent conductive film. It is just for convenience of expression that the transparent conductive film is divided into the first transparent conductive film and the second transparent conductive film; that is, the electro - controlled dimming film is composed of two flexible transparent conductive films and a dimming functional medium layer sandwiched therebetween.

[0031] Preferably, the dimming functional materials in the dimming functional medium layer include any one or a combination of at least two of polymer - dispersed liquid crystal, dye - doped polymer - dispersed liquid crystal, nanoparticle - doped polymer - dispersed liquid crystal, suspended - dispersed nanoparticles, polymer - dispersed suspended - dispersed nanoparticles, and electrochromic materials.

[0032] Preferably, the thickness of the dimming functional medium layer is 5 - 200 microns, such as 5 microns, 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, 120 microns, 130 microns, 140 microns, 150 microns, 160 microns, 170 microns, 180 microns, 190 microns, 200 microns, etc.

[0033] Preferably, the first transparent conductive film is adjacent to the water - adherent adhesive film.

[0034] Preferably, a protective film is further provided on the side of the second transparent conductive film away from the dimming functional medium layer; the protective film protects the electro - controlled composite dimming film from being scratched and soiled during processing, transportation, and film - sticking construction.

[0035] Preferably, a high - barrier PET release film is further provided on the side of the water - adherent adhesive film away from the electro - controlled dimming film; the high - barrier PET release film plays a role in waterproofing and moisture - proofing.

[0036] Preferably, the electro - controlled composite dimming film includes a high - barrier PET release film, a water - adherent adhesive film, a first transparent conductive film, a dimming functional medium layer, a second transparent conductive film, and a protective film that are sequentially stacked.

[0037] Second aspect, the present invention provides a method for preparing an electro-control composite dimming film as described in the first aspect, and the preparation method includes the following steps:

[0038] Method 1: Mix the raw materials for preparing the water-adhesive film to obtain a mixed material, coat the mixed material on one side surface of the electro-control dimming film, cure it, and then attach an optional high-barrier PET release film on the surface of the water-adhesive film (ensuring that wet curing does not occur prematurely during storage, processing, and transportation) to obtain the electro-control composite dimming film;

[0039] Alternatively, the preparation method includes the following steps:

[0040] Method 2: (1) Mix the raw materials for preparing the water-adhesive film to obtain a mixed material, coat the mixed material on the high-barrier PET release film, cure it, and then attach another high-barrier PET release film on the surface of the water-adhesive film;

[0041] (2) Remove one of the high-barrier PET release films, and then attach the electro-control dimming film to the water-adhesive film to obtain the electro-control composite dimming film.

[0042] Preferably, the curing in Method 1 includes thermal curing or ultraviolet curing.

[0043] Preferably, the curing in Method 1 is carried out in an inert atmosphere.

[0044] Preferably, the inert atmosphere includes nitrogen or argon.

[0045] Preferably, the curing in step (1) includes thermal curing or ultraviolet curing.

[0046] Preferably, the curing in step (1) is carried out in an inert atmosphere.

[0047] Preferably, the inert atmosphere includes nitrogen or argon.

[0048] Third aspect, the present invention provides an application of the electro-control composite dimming film as described in the first aspect in architectural glass and transportation glass.

[0049] The usage method of the electro-control composite dimming film provided by the present invention can be, for example, after spraying water on the surface of the attachment, covering it on the attachment, and then using a squeegee to drain the water under the water-adhesive film to achieve a tight fit between the electro-control composite dimming film and the attachment.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The adhesive film attached to the electrically controlled composite dimming film provided by the present invention only needs a layer of structure (water-adhesive film); the electrically controlled composite dimming film can be applied to the glass surface by water-adhesive method. After the water-adhesive operation is completed, the moisture remaining between the water-adhesive film and the glass is consumed by the reaction with the moisture-curable component in the water-adhesive film and cannot penetrate into the dimming medium layer of the electrically controlled dimming film. The electrically controlled composite dimming film of the present invention can greatly improve the construction speed of glass film modification projects for buildings, automobiles and other transportation vehicles, and improve the film quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of the structure of the electrically controlled composite dimming film provided in Example 1;

[0053] Among them, 101-high barrier PET release film, 102-water adhesive film, 103-first transparent conductive film, 104-dimming functional medium layer, 105-second transparent conductive film, 106-protective film. DETAILED DESCRIPTION

[0054] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0055] Example 1

[0056] In this embodiment, an electrically controlled composite dimming film is provided, and its structural schematic diagram is shown as follows: Figure 1 As shown, the electrically controlled composite dimming film includes a high-barrier PET release film 101, a water-adhesive film 102, a first transparent conductive film 103, a dimming functional medium layer 104, a second transparent conductive film 105, and a protective film 106 which are stacked in sequence;

[0057] Among them, the brand of high barrier PET release film 101 is -MDA; the first transparent conductive film 103, the dimming functional medium layer 104, the second transparent conductive film 105, and the protective film 106 constitute an electrically controlled dimming film, which is a CKW1-SL125 dimming film product of Jiangsu Tonghui New Materials Co., Ltd.

[0058] The thickness of the water-based adhesive film 102 is 30 microns, and the raw materials for its preparation include the following components in parts by weight:

[0059]

[0060] The resin is a mixture of CN9001 NS, CN8888 NS and CN8898 NS, and the addition ratio is CN9001: 5 parts, CN8888: 3 parts, CN8898: 12 parts; the monomer is a mixture of SR420, SR502, SR601 and SR395, and the addition ratio is SR420: 8 parts, SR502: 1 part, SR601: 3 parts, SR395: 8 parts; the moisture-curable monomer is a mixture of KH570, 2-pentanone oxime silane and KH550, and the addition ratio is KH570: 4 parts, 2-pentanone oxime silane: 2 parts, KH550: 4 parts; the initiator is a mixture of Irgacure TPO and Irgacure 184, and the addition ratio is Irgacure TPO: 0.2 parts, Irgacure 184:0.8 parts.

[0061] The preparation method of the electrically controlled composite dimming film comprises the following steps:

[0062] Under nitrogen protection, the raw materials for preparing the water-adhesive film are mixed to obtain a mixture, and then the mixture is coated on one side of the electrically-controlled dimming film under nitrogen protection, and then cured by ultraviolet light. After the water-adhesive film is cured and shaped, a high-barrier PET release film is quickly attached to the surface of the water-adhesive film to obtain the electrically-controlled composite dimming film.

[0063] Example 2

[0064] The difference between this embodiment and embodiment 1 is that the amount of each component in the raw materials for preparing the water-adhesive film is different, as follows:

[0065] The raw materials for preparing the water-based adhesive film include the following components in parts by weight:

[0066]

[0067] The resin is CN9001 NS; the monomer is a mixture of SR420 and SR502, and the addition ratio is: SR420: 20 parts, SR502: 20 parts; the moisture-curable monomer is KH570; and the initiator is Irgacure TPO.

[0068] Example 3

[0069] The difference between this embodiment and embodiment 1 is that the amount of each component in the raw materials for preparing the water-adhesive film is different, as follows:

[0070] The raw materials for preparing the water-based adhesive film include the following components in parts by weight:

[0071]

[0072]

[0073] Among them, the resin is a mixture of CN9001 NS, CN8888 NS and CN8898 NS, and their addition ratios are: CN9001: 20 parts, CN8888: 3 parts, CN8898: 12 parts; the monomers are a mixture of SR420, SR502, SR601, SR395, and their addition ratios are: SR420: 1 part, SR502: 1 part, SR601: 2 parts, SR395: 1 part; the moisture-curable monomer is 2-pentanone oxime silane; the initiator is Irgacure 184.

[0074] Example 4

[0075] The difference between this example and Example 1 is only that the thickness of the water sticker film is 50 microns.

[0076] Example 5

[0077] The difference between this example and Example 1 is only that the thickness of the water sticker film is 5 microns.

[0078] Example 6

[0079] The difference between this comparative example and Example 1 is only that the thickness of the water sticker film is 100 microns.

[0080] Example 7

[0081] The difference between this comparative example and Example 1 is only that the thickness of the water sticker film is 3 microns.

[0082] Comparative Example 1

[0083] The difference between this comparative example and Example 1 is only that the water sticker film does not contain a moisture-curable component and is a single-layer acrylate-based OCA film (Model T3050 of Suzhou Tongwang Power Electronics Technology Co., Ltd.).

[0084] Comparative Example 2

[0085] The difference between this comparative example and Example 1 is only that the water sticker film does not contain a moisture-curable component and is a single-layer silicone-based OCA film (Model TS108 of Palomar Co., Ltd.).

[0086] Perform performance tests on the electro-controlled composite dimming films provided in the examples and comparative examples. The test method is as follows:

[0087] (1) Stick the electro-controlled composite dimming film sample on a clean glass plate of the same material by water sticking method, and the same operator scrapes off the water between the film and the glass with the same force.

[0088] (2) Wipe off the water droplets at the edge of the sample film.

[0089] (3) After the sample is left standing at room temperature for 3 hours, the haze of the sample is measured after power-on.

[0090] (4) The sample is connected to an electric power meter, and at room temperature, the apparent power consumption value of the sample is measured and recorded in real time during long-term power-on. The measurement interval is once every 1 hour, and the maximum test duration is 2000 hours.

[0091] (5) Observe the increase in the power consumption of the sample.

[0092] (6) If the power consumption of the sample increases significantly during long-term power-on, it is determined that the absorption of water by the adhesive film fails.

[0093] (7) After power-on is completed, the haze of the sample in the powered-on state is tested again.

[0094] The performance test results are shown in Table 1.

[0095] Table 1

[0096]

[0097] As can be seen from Table 1, for ordinary water sticker adhesive films without wet-curable components (Comparative Examples 1-2), residual moisture will cause an increase in the power consumption of the electro-control dimming film and is prone to electric breakdown; for water sticker adhesive films with wet-curable components (Examples 1-5), it is possible to prevent residual moisture from penetrating into the electro-control dimming film, thus ensuring the long-term stable operation of the dimming film; if the thickness of the water sticker adhesive film with wet-curable components is too large (Example 6), it will likely increase the haze in the transparent state of the electro-control composite dimming film and affect the product quality; if the thickness of the water sticker adhesive film with wet-curable components is too small (Example 7), it will likely not be able to completely remove the residual moisture, and will still affect the long-term stable operation of the electro-control composite dimming film.

[0098] The applicant declares that the present invention uses the above embodiments to illustrate the electro-control composite dimming film and its preparation method and application of the present invention, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of the raw materials selected for the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. An electronically controlled composite dimming film, characterized in that, The electrically controlled composite dimming film comprises a water-adhesive film and an electrically controlled dimming film; The water-adhesive film includes a moisture-curable component.

2. The electro-control composite dimming film according to claim 1, wherein The moisture-curable component includes any one of an isocyanate group, an alkyloxysilyl group, and a ketoxime silicon group, or a combination of at least two of them.

3. The electro-controlled composite dimming film according to claim 1 or 2, characterized in that, The raw materials for preparing the water-based adhesive film include the following components in parts by weight: Resin 1-35 parts; 6-55 parts of monomer; Initiator 0.1-3 parts; Preferably, the resin includes any one of acrylate polymer, polyurethane acrylate polymer, modified polyurethane acrylate polymer, polyurethane polymer, vinyl polymer, polyurea polymer, polyether polymer, vinyl-vinyl acetate copolymer, and silicone polymer, or a combination of at least two thereof; Preferably, the monomer comprises a moisture curable monomer; Preferably, the moisture-curable monomer includes any one of KH570, 2-pentanone oxime silane, and KH550, or a combination of at least two thereof; Preferably, the monomer further comprises other monomers; Preferably, the other monomers include any one or a combination of at least two of acrylate, methacrylate, polydimethylsiloxane acrylate, polydimethylsiloxane polyacrylate, polydimethylsiloxane acrylate, polydimethylsiloxane acrylate, and polydimethylsiloxane acrylate; Preferably, the monomers include 1-15 parts of moisture-curable monomers and 5-40 parts of other monomers; Preferably, the initiator includes any one of Irgacure TPO, Irgacure 184, Irgacure 819, Irgacure 754, and azobisisobutyronitrile, or a combination of at least two thereof.

4. The electro-controlled composite dimming film according to any one of claims 1-3, characterized in that, The thickness of the water-adhesive film is 5 to 50 microns.

5. The electro-controlled composite dimming film according to any one of claims 1-4, characterized in that, The electrically controlled dimming film includes any one of polymer dispersed liquid crystal film, dye-doped polymer dispersed liquid crystal film, nanoparticle-doped polymer dispersed liquid crystal film, suspended dispersed nanoparticle film, polymer-dispersed suspended dispersed nanoparticle film, and electrochromic film, or a combination of at least two of them.

6. The electro-controlled composite dimming film according to any one of claims 1-5, characterized in that, The electrically controlled dimming film comprises a first transparent conductive film, a dimming functional medium layer, and a second transparent conductive film which are stacked in sequence; Preferably, the dimming functional material in the dimming functional medium layer includes any one of polymer dispersed liquid crystal, dye-doped polymer dispersed liquid crystal, nanoparticle-doped polymer dispersed liquid crystal, suspended dispersed nanoparticles, polymer-dispersed suspended dispersed nanoparticles, and electrochromic materials, or a combination of at least two thereof; Preferably, the thickness of the dimming functional medium layer is 5 to 200 microns; Preferably, the first transparent conductive film is disposed adjacent to the water-adhesive film; Preferably, a protective film is further provided on a side of the second transparent conductive film away from the dimming functional medium layer; Preferably, a high-barrier PET release film is further provided on the side of the water-adhesive film away from the electrically-controlled dimming film.

7. The electro-controlled composite dimming film according to any one of claims 1-6, characterized in that, The electrically controlled composite dimming film comprises a high-barrier PET release film, a water-adhesive film, a first transparent conductive film, a dimming functional medium layer, a second transparent conductive film, and a protective film which are stacked in sequence.

8. A method for preparing an electro-controlled composite dimming film as described in any one of claims 1-7, characterized in that, The preparation method comprises the following steps: Method 1: Mix the raw materials for preparing the water sticker adhesive film to obtain a mixed material, coat the mixed material on one side surface of the electrochromic film, cure it, and then attach an optional high-barrier PET release film on the surface of the water sticker adhesive film to obtain the electrochromic composite film; Alternatively, the preparation method comprises the following steps: Method 2: (1) Mix the raw materials for preparing the water sticker adhesive film to obtain a mixed material, coat the mixed material on a high-barrier PET release film, cure it, and then attach another high-barrier PET release film on the surface of the water sticker adhesive film; (2) Remove one of the high-barrier PET release films, and then attach the electrochromic film to the water sticker adhesive film to obtain the electrochromic composite film.

9. The preparation method according to claim 8, wherein, The curing in Method 1 includes thermal curing or ultraviolet curing; Preferably, the curing in Method 1 is carried out in an inert atmosphere; Preferably, the curing in step (1) includes thermal curing or ultraviolet curing; Preferably, the curing in step (1) is carried out in an inert atmosphere; Preferably, the inert atmosphere includes nitrogen or argon.

10. Application of an electrochromic composite film according to any one of claims 1-7 in architectural glass and vehicle glass.

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