TW323296B - Epoxy/acrylate polymer dispersed liquid crystal film - Google Patents

Abstract

A polymer dispersed liquid crystal (PDLC) composition comprises: (1) thermal-curable resin, (2) photo-curable resin, (3) thermal curing agent, (4) photo initiator, and (5) liquid crystal, in which (1) thermal curable resin is selected from epoxy resin, (2) photo-curable resin is selected from acrylic resin, (3) thermal curing agent is selected amine, anhydride and other thermal curing agents for room temperature to elevated (>200C) temperature, (4) photo initiator is selected from peroxide, azo compound, disulfide, benzoin, benzil and benzophenone, and (5) liquid crystal is selected from nematic liquid crystal; the mixing ratio in weight of (1) thermal-curable resin and (2) photo-curable resin being 9/1 to 3/7; the mixing ratio in equivalent of (3) thermal curing agent and (1) thermal-curable resin being 0.4/1 to 1/1.2; the amount of (4) photo initiator relative to (2) photo-curable resin being 0.5phr to 10phr; and the amount of liquid crystal relative to the total weight of the system being 10 wt.% to 90 wt.%.

Description

A7 A7 «Printed B7 by Jeonggong Consumer Cooperative of the Central Bureau of Economic Affairs and Economics V. Description of the invention (1) [Background of the invention] The liquid crystal display currently in use is mainly a twisted nematic liquid crystal display (Twisted Nematic Liquid Crystals Display, TN -LCD) and Super Twisteci Nematic Liquid Crystals Display (STN-LCD), and has become the mainstream of flat panel displays, including watches, computers, even portable color TVs and personal computers. use. However, due to the limitation of display principle and component structure, the display quality has been unable to break through the defects of small area, narrow viewing angle, gray brightness, insufficient slope ratio and high product defect rate. Among various improvement methods, polymer dispersed liquid crystal films (PDLC) made by polymer film-forming technology are one of them. It can be applied to light control devices such as display elements, projection displays, temperature sensing indications, dimmable windows, and solar control. The so-called polymer-dispersed liquid crystal film refers to the number; U III diameter liquid crystal droplets are evenly dispersed in the high-breakup substrate, forming a liquid crystal / polymer composite film with electro-optic properties, which can be controlled by an external electric field Light scattering, to modulate the transmittance of the polymer dispersed liquid crystal film to incident light, so the polymer dispersed liquid crystal film can control the light scattering state to quickly change to the transparent state by applying an electric field, resulting in a strong contrast between light and dark, and has a traditional liquid crystal display In addition to the color of the screen, the polymer dispersed liquid crystal film does not need to add a polarizing plate in the application, and can overcome the problem of liquid crystal loss caused by poor packaging in the traditional manufacturing process, so it has great development potential. The current methods of preparing polymer dispersed liquid crystal films can be divided into three categories: ^ * kwf / J 丨, # I-_ I li. N I-! I I ........ I- I ^^ 1 I -III ........ I ^ _ (please read the 4 ^ face note ^ | ^ and then fill in this page> A7 B7 323296 V. Description of the invention (2) 1. The penetration method (PermeationMethod) will Nematic (Neuatic) liquid crystal penetrates into a microporous polymer sheet. 2. NCAP (Nematic Curvilinear Aligned Phase Method) Emulsified solution formed from Nematic (Nematic) liquid crystal and water-soluble high score In the process, the water is evaporated to make the liquid crystal uniformly dispersed in the polymer base material in the form of micro-hairs. 3 · Phase Separation Method (Phase Separation Method) Mainly uses the difference in solubility between the polymer and the liquid crystal molecules to produce phase separation ' The liquid crystal droplets are naturally dispersed in the polymer substrate. Due to the limitations of the infiltration method and the NCAP method in the manufacturing process, the substrates that can be used are limited. The phase separation method is used to make the polymer dispersed liquid crystal film, except for the liquid crystal micro Droplets can be naturally dispersed in the polymer substrate during film formation, and have the following advantages: (a) Liquid crystal droplets, (b), the size of the liquid crystal droplets can be adjusted, (c) different types of substrates can be applied, (d) the manufacturing process is simple and the production cost is reduced. The phase separation method can be further divided into: A. Luo agent-induced phase separation ( s〇ivenuncjuc; e (j phase Separation, SIPS) dissolves the liquid crystal and the polymer into a homogeneous solution with a solvent, and then solidifies the polymer during the volatilization of the solvent to initiate phase separation, and the liquid crystal precipitates in the form of droplets and is evenly dispersed For polymer substrates. The rate of volatilization by the solvent can control the size of the liquid crystal droplets formed. This method is usually applied to thermoplastic resins, but (please read the note ^ on the back before filling in the true)

The Central Bureau of Economics of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Central Cooperative Bureau of Cooperative Printing Copies of the paper used in the BBI materials standard (CNS) A4i0UM 21GxW Gong Cang) Ministry of Economic Affairs Central Bureau of Standards Cooperative Workers Cooperative Inquiry A7 B7 V. Description of the invention (3 ) This method has the problems that the solvent evaporation rate is not easy to control and the solvent evaporation is incomplete and remains. B. Temperature-induced phase separation (Temperature Induced Phase Sepemtimi, TIPS) · 'In 1988 West first proposed that the homogeneous solution of liquid crystal and polymer was heated to above the melting point of the polymer, and then the phase was initiated by the cooling process After separation, the liquid crystal will precipitate in the form of droplets and be evenly dispersed on the polymer substrate. This method usually uses a thermoplastic resin substrate, so its polymer dispersion liquid crystal film cannot be used in a large temperature range, because the film is easily re-formed under high temperature heating. C. Polymerizaticm Induced Phase Separation (PEPS) Mixed liquid crystal and polymer monomer form a homogeneous solution. After polymerization, as the polymer chain length increases, the liquid crystal solubility decreases and the liquid crystal gradually forms droplets until it reaches a high level. The molecular gel solidifies and traps the droplet pattern. The liquid crystal is uniformly dispersed in the polymer substrate in the form of droplets. Polymerization can generally be achieved by the following methods: (a) Condensation polymerization (Condensation Polymerization) (b) Free radical polymerization (Free Radical Polymerization) (c) Photo-Initiated Polymerization (Photo-Initiated Polymerization) Home rubbing (CMS) A4 regulation (21〇X2974Mt) ΓΙ — ——Ρ— (Please read the precautions on the back before filling out this page) Order f! 1 1 Printed by the Men ’s Consumer Cooperative Cooperative of the Ministry of Economic Affairs

---- P——I ---. Subscribe / — (please read the note f on the f-face first and then fill in this ranunculus) A7 B7 V. Description of the invention (4) Condensation polymerization is generally used in epoxy resins due to the ring Oxygen resin has low shrinkage and excellent adhesion. It can be made into a polymer-dispersed liquid crystal film by heating to initiate polymerization, which can avoid the inconvenience of solvent evaporation, but its incomplete curing degree often causes the polymer-dispersed liquid crystal film. The starting voltage and should be changed with time. For the photo-initiated polymerization reaction, a photo-initiator () is added to the vinyl-containing monomer or unsaturated double bond resin, and the polymerization reaction is initiated by ultraviolet light irradiation. The polymer dispersion liquid θ film is prepared by the ultraviolet light irradiation method. Not only can accurately control the hardening conditions and the production speed is fast, it saves energy, and it can be made into a large-area finished product. However, compared with the finished product of the epoxy resin series, it needs a same voltage to get a larger penetration, and there is UV Light irradiation easily affects the properties of the liquid crystal and the residual of the initiator. The insufficient mechanical strength is also a problem. The method used by Meng to prepare the liquid crystal film of the polymer analyzer is `` one of the above methods '' without exception. Lang patent 4,435,047, US Patent 4,763,255, US Patent 4,728,547. Among the above methods of manufacturing polymer dispersed liquid crystal films, they are directly formed in two pieces of ITO conductive glass (or plastic). However, these manufacturing methods have quite a few shortcomings , Such as mass production is not easy, quality is unstable, production yield is low, online processing is inconvenient, so there are more methods for making polymer dispersed liquid crystal film Various methods, but up to now, the industrial acceptance is low, and it has not been widely used. Although the present invention is also a cold competition award: the method of making a polymer dispersed liquid crystal film, but it is financially bifunctional Record_system

This paper ⑽ is green) 323296 ;; 111111 '' · " 11 — 'V. Description of the invention (5) ~~~~' ~ " Π Mix with heat hardenable resin and light hardenable resin, add light The first agent 'thermo-hardener and liquid crystal' forms a homogeneous solution, and the film-forming technology of step-by-step hardening with ultraviolet light / heat, first uses ultraviolet light to initiate the crosslinking reaction of the photohardenable tree to produce a supportable gum The type of structure required for chemical transmission film. At this time, the liquid crystal and the thermosetting resin are covered in the cross-linked I mesh of the ultraviolet curing resin. The film formed at this stage is like a double-sided tape. After tearing off the release paper on both sides, it can be processed and used. According to the requirements, cut into the required I shape and size, paste it into the upper and lower two pieces of ITO conductive broken glass, and then harden by the thermosetting resin that has not reacted | In the process, the liquid crystal gradually aggregates into droplets and separates from the resin phase, forming a solid liquid crystal film, and tightly adheres the two pieces of ITO conductive broken glass. When applied with an electric field, this film can switch from a light-scattering state to a transparent state, producing a contrast between light and dark, with optical response properties. The production of polymer-dispersed liquid crystal film according to this creative invention not only has simple processing procedures, but also has stable quality and high product yield * and has the advantages of mass production and easy online processing. The above characteristics and advantages are produced by other methods at present High scores can not be achieved by dispersing the liquid crystal film. 1. Due to the current methods of manufacturing "Bonson dispersion liquid crystal film", they are directly formed in two pieces of ITO conductive glass (plastic). These manufacturing methods have many defects, such as difficult mass production, unstable quality, and production. Low yield and inconvenient on-line processing, so the preparation of polymer dispersed liquid crystal film "Zhang Niuzuo uses Zhongzhun (CNS) from the threat (21Gx297 public)

V. Description of the invention Although there are various methods, the method has so far received low industrial acceptance and cannot be widely used in the optoelectronic industry. The present invention uses heat-hardenable resins such as epoxy resin and Wako Hardenable resin, such as acrylic resin, mixed into a bifunctional resin system, adding a photoinitiator, a thermosetting agent, and a liquid crystal to form a homogeneous solution, and gradually hardening with UV light / heat. Preparation of polymer-dispersed liquid crystal film. Firstly, external light initiates the cross-linking reaction of the photohardenable resin, resulting in the structure required to support the semi-gelatinized film, commonly known as the rhyme stage, at which time the liquid crystal and the heat hardenable resin are wrapped Covered in the network of UV-curable resin. The film formed at this stage (B-stage) is like double-sided tape. When applied, tear off the release paper on both sides to process it. It can be cut into as needed The required shape and size are pasted into the upper and lower two pieces of ITO conductive glass, and then hardened by the unreacted thermo-hardenable resin in a heat-hardening polymerization method. With the hardening process, the liquid crystal Gradually agglomerate into droplets, separate from the resin phase, form a solid liquid crystal film, and firmly adhere the two pieces of ITO broken glass. #. (Please read the note on the back of the item before filling in this title)

If !! 奵: It is printed by this method by the Central Sample Bureau of the Ministry of Economic Affairs. It is a photoelectric film made by this method. It has the advantages of light curing, low pollution, high quality and reliability, and high strength and adhesion of thermosetting resin. The most important thing is the production method of excellent greenness and excellent green. When it is operated online, it is completely processed by semi-solid film, which avoids the instability during fluid processing, so it has mass production, stable quality, and good yield. High, easy processing, high strength and high adhesion and many other advantages.

iy A7 B7 Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention ([detailed description]) The present invention uses heat-curable epoxy resin and ultraviolet-curable acrylic resin to form a bifunctional resin System, as the polymer substrate of the polymer dispersed liquid crystal film.According to the electro-optical characteristics of the polymer dispersed liquid crystal film, the refractive index of the resin after curing must be equivalent to the refractive index (n〇) of the liquid crystal under 〇n_state. In order to allow light to pass easily without scattering, the thermosetting resin and the photohardening resin can be formulated with two or more resins, so that the refractive index and the refractive index of the liquid crystal (n.) Are equivalent. The epoxy resin may be an aromatic epoxy resin, or an epoxy resin containing a benzene ring group or a heterocyclic structure, such as an amide-modified ring gas tree (Imide Modifiedl Epoxy), or an aliphatic epoxy resin. Umebe. To adjust the refractive index of the epoxy tree cell to the refractive index (no) of the crystal, it can be mixed with one, two or more epoxy resins, or it can be formulated in epoxy resins. Add epoxy resin thinner, or other diluents with good compatibility with epoxy resin. The hot hardening agent of epoxy resin can use amine type curing agent (Amine curing agents), also can use acid anhydride type hardening side 】 (Anhydride curing agent), or other polyacid compounds or salt compounds that can polymerize with epoxy resins. Ultraviolet light-curable resins can use acrylic resins with unsaturated double bonds, or modified acrylic resins , Such as acrylic resin modified in impact resistance, heat resistance, or toughness, etc .. Light hardening initiator table paper scale using China "Home Falcon (CMS) M specifications (210X297 Gong Pan) ter ----- ---: ------- · Λ ^ ΙΙ. (Please listen to the note # ^ Item on the back of It first and then leave the book) --- ^-# 1-I ---- 1

t Printed by the Consumer Labor Cooperative of the Central Bureau of Economic Development of the Ministry of Economic Affairs *. A7 _B7__ 5. Description of the invention (8) (photo initiator) may use peroxide or azo compound (A ^ o compound). In order to prepare the refractive index of the acrylic resin to be equal to the refractive index of the liquid crystal (U〇), one, two or more acrylic resins can be used for mixing, and a reactive acrylic thinner can be added to the acrylic resin formulation. The resin and the photo-curable resin are mixed into a bifunctional resin system, and the photo-forming initiator, thermo-curing agent, and nematic liquid crystal are added to form a homogeneous solution, and the film-forming technology is gradually hardened by ultraviolet light / heat. Preparation of polymer dispersed liquid crystal film. First use ultraviolet light to initiate the crosslinking reaction of the photohardenable resin to produce the structure required to support the semi-gelatinized film, commonly known as the B-stage, when the liquid crystal acoustothermal hardenable resin is coated with ultraviolet light hardening grease In the network. The film formed in this stage (stage), like double-sided tape, is torn off the release paper on the rain surface during application, and can be processed and used. It can be adhered to the two upper and lower ΪΤ0 conductive glasses according to the required shape and size Then, the thermally hardenable resin that has not reacted is hardened by heating. With the hardening process, the liquid crystal gradually aggregates into droplets, phase separates from the resin to form a solid film, and tightly adheres the two pieces of IT0 glass. The description of the production procedure is as follows: _ (1) On the transparent flat broken glass, cover with a layer of release film, and then apply the uniformly combined solution on the release film, try to avoid the generation of air bubbles during the coating process. The thickness is controlled by a distance of 50 to m, and then covered with a piece of paper ^^^^ 7 ^ (210) < 297 ^ 7_, --- (please read the note f on the back and then fill the nest to buy)

A7 __B7. &Quot; ....-. .-— _ V. Description of the invention (9) The delamination of the delaminated film and glass sheet prevents the oxygen from hindering the photocrosslinking reaction during UV curing. (2) The mixture of the two glass sheets is irradiated with ultraviolet light for several seconds to tens of seconds, depending on the reactivity of the light-curable resin, so that the light-curable resin undergoes radical polymerization reaction. A glass sheet can be used to obtain a film with good softness. In application, the release film can be removed and used like double-sided tape. (3) Tear off the release film, and then stick the semi-gelatinized polymer dispersed liquid crystal film on the ITO conductive glass, then cover it with another IT0 conductive glass, put it in a hot air environment, and heat it at a specific temperature to make The epoxy resin produces a hardening reaction. After hardening, it is moved to room temperature and cooled. The Ministry of Economic Affairs, Central Bureau of Economic Development, Beigong Consumer Cooperative Society, Yin m. Ml m af. M * n ^ Hi * HJ I (please read the notes on the back and fill this page)

The polymer-dispersed liquid crystal film produced by this method has the advantages of convenience in light curing, low pollution, high reliability of Pinxian, and high strength and good adhesion of thermosetting resin. It can be applied to light control devices such as display elements, projection displays, temperature sensing indications, dimmable windows, and solar control. It is particularly important that this invention first produces a semi-gelatinized film that is hardened by ultraviolet irradiation. Therefore, the application of the processing procedure for the preparation of polymer-dispersed liquid crystal films in the subsequent performance, Yuanquan is processed in a semi-solid manner, which is simpler and more convenient than the processing method for preparing polymer-dispersed liquid crystal films made of fluid compositions as described in the previous patents. Avoid the instability of the fluid composition during the processing, such as the overflow of the liquid, the liquid crystal aggregation is not dispersed, etc. Therefore, the polymer dispersion of this invention is based on the paper standard of China National Standard (CNS) Α4 Specification '_ (297 冷 It) 1 ~~ 一 ~ ----- Printed by the Ministry of Economic Affairs Central Bureau of Industry and Consumer Cooperatives 3 hearts 0 2 9 6 Α7 ___; ___ Β7 _ V. Description of the invention (10) In addition to the ease of application and processing, the crystal film has many advantages such as stable quality, high product yield, and mass production. At present, many bottleneck obstacles in the preparation of polymer-dispersed liquid crystal films, such as inconvenience in online processing, unstable quality: low production yield, and difficulty in mass production, etc., the polymer-dispersed liquid crystal film of this invention can be overcome. The following application examples are described here, but the present invention is not limited to these examples: Poor use case 1-Thermosetting epoxy resin adopts Epon828 (A) and DER732 (B) two kinds of 'photohardening acrylic resin adopts Bisphenol A Epoxy Diacrylate (DGEBDA) (C) and l, 64iexanediol Diacry 丨 ate (HDDA) (D) The two 'light hardening initiators and heat hardeners are 1 _Hydr〇xy_cyclo-

phenyl-ketone (HCPK) and Dicyandiamide (DICY). A and B are mixed in a weight ratio of 1 to 2, c and D are mixed in a weight ratio of 2 to 3, and epoxy resin and acrylic resin are mixed in a weight ratio of 3 to 2. Practical Example 2 Nematic liquid crystal E7 was added to the resin formulation of Practical Example 1. The liquid crystal contents were 20wt%, 30wt%, 40wt%, 50wt%, and 60wt% relative to the total weight of the system. · 'This paper XA uses China · _quasi (⑽)......... ·-·.' ....... .. m- fn n ml mat In ^ 111 UK n ( Please read the back page first, and pay attention to the matter before filling in the nest page). Order 9, 9. Du Yinmu, Consumer Labor Cooperation, Central Standards Bureau, Ministry of Economic Affairs, Invention Description (u) Practical Example 3 Polypyrrole in the resin formulation of Practical Example 1, Its addition, ^ door knife in P〇lypy_e. f ⑽ Add 0.5 to 1.5g of coffee purpose Practical example Four amount of eight purpose formula order to add nematic liquid crystal E7, the total weight of the liquid crystal system. 4_, 5Gwt%, and 6Gw_ For the practical example 5 / Thermosetting epoxy resin adopts DER732 (B), the graded acrylic resin, the light curing initial j, and the thermosetting agent are the same as the practical example-the system . Epoxy resin and acrylic resin are mixed in a weight ratio of 7 to 3. Practical Example 6 Nematic liquid crystal was added to the resin formulation of Practical Example 5, the liquid crystal content was 30wt%, 40wt%, 50wt%, and 60wt% relative to the weight of the system. This paper size is applicable Chinese National Sample Rate (CNS) A4 Specification (2MJ) C297 (^ ||) (please read the back ^ aij ^ item first and then fill in this tile) hr ——— | 丨 0—!丨 Subscribe 丨 丨 丨 --ιβ.

The thermosetting epoxy resin adopts Epon828 (A) and DER736 (E) rain types. The photohardening acrylic resin, photohardening initiator, and thermosetting agent are the same as the system of practical example 1. A and E are mixed in a weight ratio of 1 to 4, C and D are mixed in a weight ratio of 3 to 7 'and epoxy resin and acrylic resin are mixed in a weight ratio of 7 to 3. Practical Example 8 Nematic liquid crystal E63 was added to the resin formulation of Practical Example 7, the liquid crystal content was 30wt%, 40wt%, 50wt%, and 60wt% relative to the total weight of the system. (Please listen to the back of the far f item # fill in this education) — 丨 · 11 — Lamp --- Practical example of printing and printing of the Ministry of Economic Affairs, Central Bureau of Industry and Economics Beigong Consumer Cooperatives nine thermosetting epoxy resin and light curing acrylic resin and The system of practical example 7 is the same. The epoxy resin and the acrylic resin are mixed in a weight ratio of 3 to 2. Practical Example 10 Nematic liquid crystal E63 was added to the resin formulation of Practical Example 9, and the liquid crystal contents were 30%, 40%, 50%, and 60% by weight relative to the total weight of the system. The size of this paper is applicable to the Chinese National Standardization (CNS) (7)...... = '.. · Printed by the Ministry of Economic Affairs, Central Bureau of Industry and Commerce, Beigong Consumer Cooperative Fifth, Invention Instructions (13 Practical Examples 11 ^ The thermosetting epoxy resin uses DER736 (E), light hardening acrylic tree, light hardening initiator and heat hardening agent as in the system of practical example 1. The epoxy resin is mixed with acrylic resin at a ratio of 7 to ⑽. Practical Example 12 The nematic liquid crystal E63 is added to the resin formulation of the use example 10—the liquid crystal content is 30 wt%, 40 wt%, 50 wt%, and 60 wt%, respectively, relative to the total weight of the system. The hardened epoxy resin adopts Epon828 (A) and DER732 (B) two kinds of light-curing acrylic resin and the system of practical example 1, the light-hardening initiator and thermal hardener are HCPK and D230. Epoxy resin A and B is mixed at a weight ratio of 2 to 3. Acrylic resins c and D are mixed at a weight ratio of 3 to 7. Epoxy resin and acrylic resin are mixed at a weight ratio of 3 to 2. t Practical example XIV clothing paper size is applicable China Family Rate (CNS) A4 Specification < 210X297mm) (Please hear first F on the back side and f on the side) ► ί '...:-* t-τ-fcF —IU, ----------------- p! ---- 1τί ·

3 ^ S296 V. Description of the invention (w A7 B7 The content of the nematic liquid crystal E63 added to the resin formulation of practical example 13 is 30wt% of the total weight. The liquid crystals 40wt%, 50wt%, and 60wt% are relative to Practical Example 15 of the system Printed in the resin formulation of Practical Example XIII by the Peking Consumer Cooperative of the Ministry of Economic Affairs of the Ministry of Economic Affairs. Epoxy resins A and B are mixed at a weight I ratio of 1: 1. Mix the epoxy resin with the acrylic resin at a weight ratio of 2 to 3 and then mix it at a weight ratio of 3 to 2. Practical Example 16 Add nematic liquid crystal to the resin formulation of Practical Example 15, the liquid crystal content is 3 〇wt%, 40wt%, 50wt%, and 60wt% are relative to the total weight of the system. Practical Example 17 In the resin formulation of Practical Example 13, the heat hardener is changed to D400, epoxy tree, squat A and B Mix at a weight ratio of 4 to 3. Acrylic resins C and D are mixed at a weight ratio of 3 to 7. Epoxy resin and acrylic resin are mixed at a weight ratio of 3 to 2. This paper size applies to two Chinese standards (CNS } Grid (210X 297 public book-) (please read the method $ item on the back and then fill in this book).

Printed by Beigong Consumer Cooperative of Central Bureau of Economics and Development, Ministry of Economic Affairs V. Description of invention (Practical Example 18 Add nematic liquid crystal E7 to the resin formulation of Practical Example 17, the content of the liquid crystal is 30rt% and 40wt% respectively , 50wt%, and 60wt% relative to the total weight of the system. Practical Example 19 The structure of the surface of the polymer-dispersed liquid crystal film can be observed using a scanning electron microscope (SEM). The first picture is prepared by Practical Example 2. SEM scan of the surface of the polymer-dispersed liquid crystal film, where the liquid crystal content is 30% by weight relative to the total weight of the system. The second figure is the SEM scan of the surface of the polymer-dispersed liquid crystal film prepared in practical example 2, where the liquid crystal content It is 50wt% relative to the total weight of the system. The figure shows that the liquid crystal is dispersed in the polymer base # in the form of droplets. Practical Example 20 The transmittance measured for the polymer dispersed liquid crystal film is defined as follows: / transmittance (%)

It 100%

It: Polymer-dispersed liquid crystal film penetration light intensity Ir: Reference sample penetration light intensity This paper size is applicable to China® Jiafeng Feng (CNS) iUlt-like male sauce) (please read method f on the back and fill in this page) , ^ wr... el i nn 1 · —— n ^ — nn n ^ i ml ftant i «HI HE— In fit a V. Description of the invention (1δ) A7 B7 The second picture is a practical example of the preparation of two trees The relationship between the applied voltage and the transmittance of the polymer dispersed liquid crystal film. Practical Example 21 * The fourth diagram is a graph showing the relationship between the apparent transmittance of an electrically dispersed liquid crystal surface prepared with a liquid crystal content of 5 Gwt% in the resin formulation of Practical Example 4. Practical Example 22 The fifth figure is the practical example X-the relationship between the applied voltage and the rate of the high-point pre-dispersed liquid crystal film prepared by the liquid crystal content of 4Gwt% in the resin formulation. > Figure π shows the transmittance of the Southern Molecularly Dispersed Liquid Crystal Film prepared by Shiqianshushufang with a liquid crystal content of 4Qwt% under different temperature environments. According to the figure, the polymer dispersed liquid crystal impurity also has the function of temperature sensing display (please read the ¾ meaning Ϋ on the back and then fill in this page)-«nn In tn— mourn ..... Du Printed by the Consumer Standards Department of the Central Bureau of Standardization. The illustration briefly illustrates the SEM scan of the first image of epoxy resin // acrylic resin polymer dispersed liquid crystal film, in which the liquid crystal content is 30wt%. Private paper recognition rate is suitable for Chinese coffee samples (CNS. ≫ Congwei (⑽χ 卩 97 時 命 323323296 V. Invention description (1? A7 B7 Second picture epoxy resin / acrylic resin polymer SEM # _, shot liquid crystal Content · (iv) The graph of the relationship between the applied voltage and the transmittance of the highly divided pre-dispersed liquid crystal film of the resin / acrylic resin system, the film thickness is 110 m. Figure 4. The fourth figure shows the addition of the conductively prepared 'nan molecule' to the strict oxygen resin / acrylic resin formulation In addition to the dispersed liquid crystal film, we know the &w;amp; ° then ▲ I ... surface? The relationship diagram. The daily content is 50wt%, the film thickness is 80 " m. Resin ⑽736) / Acrylic printed film < Applied voltage Diagram of relationship with penetration rate, film thickness ribs & claws. Epoxy resin (Xia / acrylic fine polymer dispersed liquid crystal pu film penetration rate under different temperature environments, film thickness 8〇 (please read the back of the interpretation first Please fill in this page again.). € > -1 ~ Order-Brief description of the printed stamp number of the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy 1. Liquid crystal content 2〇wt% 2. Liquid crystal content 3〇wt% 3 · Liquid crystal content 4〇wt% 4. Liquid crystal content 5〇wt% 5. The amount of conductive polymer added is 〇g6 This paper scales addition amount of 0.5g speed China National rubbing quasi (CNS) Μ Specification (2IOX29 " 7 mm)

Kwm ^ r I-—I— n… 1-r · A7 B7 printed by the Employees ’Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs V. Invention Instructions (18) 7. The amount of conductive polymer added is l.Og 8. Conductivity The amount of polymer added is 1.5g (please read the ».-ii $ item on the back and fill in this page) ---- € > 丨 丨 nn fn · ml lnl« — d hvf0 This paper size is applicable to Chinese national standards ( CNS) A4 specification (21 OX297 public daughter)

Claims (1)

Printed by the Ministry of Economic Affairs, Central Bureau of Standards and Engineering * 's cooperative, 1. A polymer-dispersed liquid crystal composition, which includes ⑻thermosetting resin (b) photohardenable wax (c) thermosetting agent (d) light Hardening initiator ⑷Liquid crystal where ⑻The heat-hardenable resin is selected from oxoxane, (ep〇Xy resin), (b) The light-hardenable resin is selected from acrylic resin, ⑻The heat hardener is selected from amines (amine ) Hardener'anhydride (anhydride) hardener_, or other normal temperature to high temperature (over 200. 〇) i thermal hardener, (d) photohardening initiator is selected from peroxide (peroxid, azo Compound (azo compound), disulfide (disulfide), benzoin (benzoin), diphenyl ethanedione (benzi 丨), or benzophenone (benzophenone), ⑹ liquid crystal is selected from nematic liquid crystal (nematic liquid crystal); ⑻The blending weight ratio of thermosetting resin and (b) photo-hardenable resin is 9: 1 to 3: 7; (c) The blending ratio of thermosetting agent and ⑻thermosetting resin The equivalent ratio may be 0.4 to 1 to 1.2 to 1; (d) the content of the photohardening initiator is 0.5 phr to 10 phr relative to (b) the photohardenable resin The content of (e) the liquid crystal content is 10wt% to 90wt% relative to the total weight of the system. 2. The composition of the polymer dispersed liquid crystal according to item 1 of the patent application, wherein the content of the thermosetting resin is 50wt% to 80wt% is relative to the total weight of the ⑻ + ⑼ resin system. The paper size is based on the Chinese national sample rate {CNS) A4 grid (210X297mm) (please read the item f on the back *) before filling (This page) Order-A8 B8 C8 D8 printed by Zhengong Consumer Cooperative of Ministry of Economic Affairs of the Ministry of Economic Affairs. Patent application for patent 3. The composition of polymer-dispersed liquid crystal according to item 1 of the patent application, in which the light can be hardened The content of the resin is 20wt% to 50wt% relative to the total weight of the ⑻ + (b) resin system. 4. The composition of polymer dispersed liquid crystal as claimed in item 1 of the patent application, wherein the liquid crystal content is 30wt% to 70wt% relative to the total weight of the system. 5. The composition of polymer dispersed liquid crystal as claimed in item 1 of the patent scope, in which the composition can be added with a conductive additive to reduce the dielectric constant of the system or with a high electrical conductivity. The film composed of the composition, the composition of which includes (a) thermosetting resin (b) photohardening resin (c) thermosetting agent (d) photohardening initiator (e) liquid crystal τ where ⑻ thermosetting resin Is selected from epoxy resins (epOXy resins), (b) photo-curable resins are selected from acrylic resins, (c) thermosetting agents are selected from amine hardeners, anhydride hardeners, or Other normal-temperature to high-temperature (above 2.00) thermal hardeners' (d) photo-hardening initiators are selected from peroxides (peroxide), azo compounds (azo compounds), and disulfides (disuifide ), Benzoin, benzoin, benzii, or benzophenone, ⑻ The liquid crystal system is selected from nematic liquid crystal; ⑻ thermal The mixing weight ratio of the hardenable film and (b) light y hardening resin is 9 to 1 to 3 to 7; (c) heat hardening—r— (please "Read the notes on the back page and fill out this page) Pack -------- book ----- ^-line 丨 丨 丨 丨 ---.. A8 B8 C8 D8 Central Bureau of Economics and Technology Beigong Consumer Cooperative The blending ratio of printing agent, patent application scope agent and ⑻thermosetting resin is equivalent ratio, which can be from 0 to 1 to i 2 to 1; (d) the content of photo-hardening initiator is 0.5 to 1 〇phr relative to the content of ⑼ photohardenable resin; (e) the liquid crystal content is 10% to 90% by weight relative to the total weight of the system. 7. The film composed of the polymer dispersed liquid crystal composition as claimed in item 6 of the patent scope, wherein the content of the thermosetting resin is 50wt% to 80wt% relative to the total of (a) + (b) resin system weight. 8. A thin film composed of a polymer dispersed liquid crystal composition according to item 6 of the patent application, in which the content of the photohardenable resin is 20wt% to 50wt% relative to the total weight of the (a) + (b) resin system. 9. A thin film composed of a polymer dispersed liquid crystal composition according to item 6 of the patent application, in which the liquid crystal content is 30wt% to 70wt% relative to the total weight of the system. 10. A thin film composed of a polymer-dispersed liquid crystal composition according to item 6 of the patent application range, in which a conductive additive or a conductive polymer that reduces the system dielectric constant can be added to the composition. 11. A method for preparing a thin film composed of a polymer dispersed liquid crystal composition, the composition of the polymer dispersed liquid crystal of claim 1 of the patent application, evenly coated on the release film according to the required film thickness, and set Take it out after illuminating under the ultraviolet light source, and then heat-harden it to initiate the cross-linking reaction of epoxy resin to form a thin film composed of polymer dispersed liquid crystal composition. 0 12. Polymer dispersed liquid crystal as claimed in item 6 The film composed of the composition is used for display elements, projection display, temperature sensing instructions, dimmable windows. Please read the note page of the ft. Binding line book, paper size, and use. «Miaojia prototype (specification (210X W7mm} A8 B8 C8 D8 Sixth, apply for the patent fan park solar control light control device, etc. (please note the f item of Mf * 'first and then = ^ write this page) Fei Cooperative Printed Paper Scale Uses Chinese «Home Bran Rate (CNS) Α4 Specification (210X297mm)