CN111285796B - Monomer, polymer, resin composition, substrate, preparation method and display device - Google Patents

Monomer, polymer, resin composition, substrate, preparation method and display device Download PDF

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CN111285796B
CN111285796B CN202010131663.2A CN202010131663A CN111285796B CN 111285796 B CN111285796 B CN 111285796B CN 202010131663 A CN202010131663 A CN 202010131663A CN 111285796 B CN111285796 B CN 111285796B
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polymer
resin composition
chemical formula
substrate
pixel defining
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CN111285796A (en
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李伟
夏晶晶
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/92—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with a hetero atom directly attached to the ring nitrogen atom
    • C07D211/94—Oxygen atom, e.g. piperidine N-oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the invention provides a monomer, a polymer, a resin composition, a substrate, a preparation method and a display device. The monomer is represented by chemical formula 1: chemical formula 1,
Figure DDA0002395923490000011
Wherein, in chemical formula 1, R1Is H or CH3，R2Is OH or CH2OH or CH2CH2OCH2CH2OH。

Description

Monomer, polymer, resin composition, substrate, preparation method and display device
Technical Field
The application relates to the technical field of chemistry and display, in particular to a monomer, a polymer, a resin composition, a display substrate, a preparation method of the display substrate and an electroluminescent display device.
Background
The electroluminescent display device has the advantages of self-luminescence, low power consumption, wide viewing angle, high response speed, high contrast and the like, so that the electroluminescent display device is widely applied to intelligent products such as mobile phones, televisions, notebook computers and the like. In addition, the electroluminescent display device has the characteristics of light weight, thin thickness and bending resistance, so that the electroluminescent display device becomes the research focus of numerous scholars at home and abroad at present.
In the electroluminescent display device, the pixel defining layer includes a pixel opening and a pixel Bank (Bank) section; the pixel Bank is an organic barrier layer between the pixel openings, and the cross section of the organic barrier layer is in a regular trapezoid structure with a narrow top and a wide bottom so as to limit ink for ink-jet printing to overflow to the periphery.
Disclosure of Invention
The embodiment of the application adopts the following technical scheme:
in a first aspect, a monomer is provided, wherein the monomer is represented by chemical formula 1: chemical formula 1,
Figure BDA0002395923470000011
Wherein, in chemical formula 1, R1Is H or CH3，R2Is OH or CH2OH or CH2CH2OCH2CH2OH。
In a second aspect, there is provided a polymer represented by chemical formula 2: chemical formula 2,
Figure BDA0002395923470000021
Wherein, in chemical formula 2, R1Is H or CH3，R2Is OH or CH2OH，R3Is CH3Or CH2CH3M is an integer ranging from 20 to 50 and n is an integer ranging from 50 to 100.
In a third aspect, a polymer is provided, the polymer being represented by chemical formula 3: chemical formula 3,
Figure BDA0002395923470000022
Wherein, in chemical formula 3, R1Is H or CH3，R3Is CH3Or CH2CH3M is an integer ranging from 20 to 50 and n is an integer ranging from 50 to 100.
In a fourth aspect, there is provided a resin composition comprising: 5-20% of fluorine-containing acrylic by weight, 1-5% of polymer by weight and organic solvent; wherein the polymer is the polymer of claim 2.
In some embodiments, further comprising: 0.5-2% by weight of a photoinitiator and 0.1-1% by weight of a polymerizable monomer.
In some embodiments, the photoinitiator comprises: any one or more of nitroaniline, anthraquinone, benzophenone and N-acetyl-4-nitro naphthylamine; the polymerizable monomers include: any one or more of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, urethane acrylate and ethoxylated pentaerythritol tetraacrylate.
In some embodiments, further comprising: 0.1-1% by weight of additives; the additive comprises any one or combination of a polymerization inhibitor, a flatting agent, a defoaming agent and a stabilizing agent.
In a fifth aspect, a substrate for display is provided, including: a substrate base plate; a pixel defining layer disposed on the base substrate, the pixel defining layer comprising a polymer as described in the third aspect above in a material thereof.
In some embodiments, further comprising: and the flat layer is arranged on one side of the pixel defining layer close to the substrate base plate and is in contact with the pixel defining layer, wherein the material of the flat layer is organic siloxane resin.
In a sixth aspect, an electroluminescent display device is provided, which includes the above display substrate.
A seventh aspect provides a method for manufacturing a substrate for display, including: forming a resin composition film on a base substrate using the resin composition; and patterning the resin composition film to form a pixel defining layer.
The monomer, the polymer, the resin composition, the substrate for display and the preparation method thereof and the electroluminescent display device are provided according to the embodiment of the invention. The monomers having the property of being thermally broken, i.e. the hydrophilic group R being removed after heating2Therefore, the polymer synthesized using the monomer also has a property of thermal cracking.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a chemical reaction formula of a synthetic product 1 provided by an embodiment of the present invention;
FIG. 2 is a chemical reaction scheme of a synthetic monomer according to an embodiment of the present invention;
FIG. 3 shows a chemical reaction scheme of a synthetic polymer 1 according to an embodiment of the present invention;
FIG. 4 shows a chemical reaction scheme of a synthetic polymer 2 according to an embodiment of the present invention;
FIG. 5 is a gel permeation chromatogram of a polymer provided by an embodiment of the present invention;
FIG. 6 is a schematic view of the contact angle of a resin composition with water before heating according to an embodiment of the present invention;
FIG. 7 is a schematic view of a contact angle of a resin composition with water after heating according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an electroluminescent display device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present invention provide a monomer, which is represented by chemical formula 1:
chemical formula 1,
Figure BDA0002395923470000041
Wherein, in chemical formula 1, R1Is hydrogen radical (H) or methyl (CH)3) One of (1), R2Is hydroxyl (OH), carbinol group (CH)2OH) or ethylene glycol Ether group (CH)2CH2OCH2CH2OH).
In some embodiments, the method of synthesizing the monomer comprises:
step 1: 1 part by weight (for example molar mass mol) of ethylene glycol methacrylate (C)10H14O4) With 1 part of triethylamine (C)6H15N) in methylene Chloride (CH)2Cl2) In the ice bath, the temperature is reduced to about 0 ℃, and then 1.1 part of bromoisobutyryl bromide (C) is added dropwise in 30 minutes4H6Br2O), the reaction was continued at room temperature for 24 hours. The reaction product was purified over sodium bicarbonate (NaHCO)3) Washing with the aqueous solution for three times, then washing with distilled water for three times, collecting the organic phase, drying and then carrying out rotary evaporation to obtain the product 1.
Here, the chemical reaction formula of the synthesized product 1 is shown in fig. 1:
TEA in the chemical reaction formula in FIG. 1 was Triethylamine (Triethylamine).
In addition, product 1 has the formula:
Figure BDA0002395923470000051
step 2: the same amount of 2,2,6, 6-tetramethyl-4-hydroxy (methyl) piperidine nitroxide (C)9H18NO) and product 1 with 0.05 part of CuBr/BPY composition in tetrahydrofuran (CH)2)4Reacting in O at 60 deg.C for 12 hr, and reacting with aluminum oxide (Al)2O3) Removing copper salt with column, and purifying with n-hexane (C)6H14) And ethyl acetate (C)4H8O2) And (4) obtaining a monomer by a column chromatography method.
The chemical reaction formula of the synthesized monomer is shown in figure 2:
here, THF in the chemical reaction formula shown in fig. 2 is Tetrahydrofuran (Tetrahydrofuran).
In the embodiment of the invention, R2Is OH or CH2OH or CH2CH2OCH2CH2OH, OH or CH2OH or CH2CH2OCH2CH2OH is a hydrophilic group, namely the monomer has stronger hydrophilicity; and the more hydrophilic the substance, the less polar, so the monomer in the embodiment of the present invention is less polar.
Embodiments of the present invention also provide a polymer 1, where the polymer 1 is represented by chemical formula 2:
chemical formula 2:
Figure BDA0002395923470000061
wherein, in chemical formula 2, R1Is hydrogen radical (H) or methyl (CH)3) One of (1), R2Is hydroxyl (OH), carbinol group (CH)2OH) or (CH)2CH2OCH2CH2OH) R3Is methyl (CH)3) Or ethyl (CH)2CH3) M is an integer ranging from 20 to 50 and n is an integer ranging from 50 to 100.
In some embodiments, the method of synthesizing polymer 1 comprises:
1 part of monomer and 3 parts of methyl (meth) acrylate (C)5H8O2) Or ethyl (meth) acrylate (C)6H10O2) Mixing and dissolving in DMF (N, N-dimethylformamide), adding 0.05 part of initiator AIBN (azo-2-isobutyronitrile), polymerizing at 90 deg.C under nitrogen atmosphere for 12 hr, and adding methanol (CH)3OH) to yield polymer 1 with a molecular weight Mn of 20000 g/mol.
Here, the chemical reaction formula of the synthetic polymer 1 is shown in fig. 3:
embodiments of the present invention also provide a polymer 2, where the polymer 2 is represented by chemical formula 3:
chemical formula 3:
Figure BDA0002395923470000062
wherein, in chemical formula 3, R1Is hydrogen radical (H) or methyl (CH)3) In (1)A, R3Is methyl (CH)3) Or ethyl (CH)2CH3) M is an integer in the range of 20-50, and n is an integer in the range of 50-100.
In some embodiments, a method of forming polymer 2 comprises: the polymer 1 was placed in air and heated at a temperature greater than 130 ℃.
Here, the chemical reaction formula for forming the polymer 2 is shown in fig. 4:
in the chemical reaction formula shown in FIG. 4, the cleaved compound is R2And piperidine (C)5H11N) due to R2For the hydrophilic group, the hydrophilic group R is formed after heating the polymer 12By cleavage, i.e. with the hydrophilic group R2The linking chemical bond is broken, so that the polymer 2 loses the hydrophilic group R2Resulting in polymer 2 becoming a more hydrophobic substance and the more hydrophobic the substance, the more polar it is and therefore the more polar polymer 2 is.
It should be noted that the chemical bond that is broken by heating is a C-O bond, which is easily broken when piperidine and C are connected, and the compound having an O-N bond may be referred to as piperidine, so that the monomer, polymer 1 and polymer 2 in the examples of the present invention each include an O-N bond. On this basis, since the monomer contains an O-N bond, the monomer also has a property of being broken by heating.
In addition, since the broken C-O bonds are recombined in the inert gas, in some embodiments, the polymer 1 is heated by being placed in air so that the broken C-O bonds are not recombined after heating.
As shown in fig. 5, fig. 5 is a Gel Permeation Chromatogram (GPC) of polymer 1 and polymer 2. A in fig. 1 represents a gel permeation chromatogram of polymer 1; b represents a gel permeation chromatogram of polymer 2. As can be seen from fig. 5, the permeation time of polymer 2 is longer than that of polymer 1, i.e., the molecular weight of polymer 2 is smaller than that of polymer 1. In some embodiments, polymer 1 has a molecular weight of Mn ═ 20000 g/mol; the molecular weight of polymer 2 was Mn 13500 g/mol.
The embodiment of the invention also provides a resin composition, which comprises 5-20% of fluorine-containing acrylic by weight, 1-5% of polymer 1 by weight and an organic solvent.
It should be understood that since the resin composition includes 1% to 5% by weight of the polymer 1 and the polymer 1 includes a hydrophilic group, the resin composition is more hydrophilic.
Here, the fluorine-containing acrylic is a copolymer of perfluorooctyl acrylate and methyl acrylate, the main chain thereof is polyacrylate, and the side chain thereof is a substance containing a fluorine (F) atom, and in general, the fluorine-containing atom in the side chain has high hydrophobicity.
The organic solvent is not limited. Exemplary organic solvents include N-methylpyrrolidone, glycol ethers, ethylene glycol alkyl ether acetates, diethylene glycol, propylene glycol monomethyl ether acetate, ethoxyethyl acetate, dimethoxyacetaldehyde, propylene glycol methyl ether acetate, ethyl 3-ethoxypropionate, propylene glycol methyl ether, and ethylene glycol ethyl acetate.
In some embodiments, the resin composition further comprises 0.5 to 2 weight percent of a photoinitiator and 0.1 to 1 weight percent of a polymerizable monomer.
Here, the photoinitiator is a negative sensitizer, and the negative sensitizer is not limited. Exemplary negative sensitizers include any one or combination of nitroanilides, anthraquinones, benzophenones, and N-acetyl-4-nitronaphthylamine.
In addition, the polymerizable monomer is not limited. The polymerizable monomer comprises any one or more of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, urethane acrylate and ethoxylated pentaerythritol tetraacrylate.
In the embodiment of the invention, the resin composition further comprises the photoinitiator, so that the steps of coating photoresist, etching and stripping can be reduced when the resin composition is prepared into a film, and the preparation process can be simplified. On the basis, as the resin composition also comprises the polymerizable monomer, the photoinitiator can generate free radicals after being irradiated by ultraviolet light, and the system of the negative glue of the photoinitiator can be cured after the free radicals and the polymerizable monomer are polymerized.
In some embodiments, the resin composition further comprises 0.1 to 1 weight percent of an additive; the additive comprises any one or the combination of a plurality of polymerization inhibitor, flatting agent, defoaming agent and stabilizer.
Exemplary polymerization inhibitors include any one or combination of hydroquinone, 2-sec-butyl-4, 6-dinitrophenol, p-tert-butylcatechol, and 2, 5-di-tert-butylhydroquinone. The leveling agent includes acrylic compounds, silicone compounds, fluorocarbon compounds, and the like. The defoaming agent comprises emulsified silicone oil, higher alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether, polydimethylsiloxane and the like. The stabilizer is one or more of isoamyl alcohol, n-hexyl alcohol, glycerol and n-hexane.
Since the resin composition of the embodiment of the present invention further includes an additive, the additive functions to make the resin composition more stable during use. For example, the polymerization inhibitor and the stabilizer are used to uniformly spread the resin composition, the leveling agent is used to facilitate the application of the resin composition, and the defoaming agent is used to allow the discharge of bubbles in the resin composition.
FIG. 6 is a schematic view showing the contact angle of the resin composition with water before heating, as shown in FIGS. 5 and 7; fig. 7 is a schematic view of the contact angle of the resin composition with water after heating. Referring to fig. 6 and 7, it can be seen that the contact angle of the resin composition with water before heat treatment is 127 °, the contact angle with water after heat treatment is 158 °, and the larger the contact angle, the more hydrophobic the resin composition is, and thus the hydrophobicity of the resin composition after heating is greater than that of the resin composition before heating.
An embodiment of the present invention further provides an electroluminescent display device, as shown in fig. 8, the main structure of the electroluminescent display device includes a frame 1, a cover plate 2, a display panel 3, and other accessories such as a circuit board 4. Here, the display panel 3 may be a flexible display panel or a rigid display panel. In the case where the display panel 3 is a flexible display panel, the electroluminescent display device is a flexible display device.
The longitudinal section of the frame 1 is U-shaped, the display panel 3, the circuit board 4 and other accessories are all arranged in the frame 1, the circuit board 4 is arranged below the display panel 3 (i.e. the back face, the face deviating from the display face of the display panel 3), and the cover plate 2 is arranged on one side of the display panel 3 far away from the circuit board 4.
The electroluminescent Display device may be an Organic electroluminescent Display device (OLED), in which case the electroluminescent Display panel is an Organic electroluminescent Display panel; or a Quantum Dot Light Emitting Display (QLED), in which case the electroluminescent Display panel is a Quantum Dot electroluminescent Display panel.
As shown in fig. 9, the display panel 3 includes a display substrate 31 and an encapsulating layer 32 for encapsulating the display substrate 31. Here, the encapsulation layer 32 may be an encapsulation substrate or an encapsulation film.
The embodiment of the invention also provides a display substrate 31, which can be applied to the electroluminescent display device. As shown in fig. 9, the display substrate 31 includes a base substrate 310, a pixel defining layer 311 provided on the base substrate 310, and a material of the pixel defining layer 311 includes a polymer 2.
In some embodiments, as shown in fig. 9, the display substrate 31 includes a light emitting device and a driving circuit provided on a substrate 310, and the driving circuit includes a plurality of thin film transistors 312. The light emitting device includes an anode 313, a light emitting function layer 314, and a cathode 315, and the anode 313 is electrically connected to a drain of the thin film transistor 312 which is a driving transistor among the plurality of thin film transistors 312. Further, the pixel defining layer 311 includes a plurality of opening portions, and one light emitting device is disposed in one opening portion. In some embodiments, the light emitting functional layer 314 includes a light emitting layer. In other embodiments, the light-emitting function layer 314 includes one or more of an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), and a Hole Injection Layer (HIL), in addition to the light-emitting layer.
In some embodiments, as shown in fig. 9, the substrate 31 for display further includes a planarization layer 316 disposed on a side of the pixel defining layer 311 close to the substrate 310, the planarization layer 316 is in contact with the pixel defining layer 311, and the material of the planarization layer 316 is an organic siloxane resin.
Here, the organosiloxane resin is formed by heating, dehydrating and polymerizing organosiloxane containing hydroxyl groups at the periphery, and a large number of hydroxyl groups exist at the periphery, resulting in higher polarity, i.e., stronger hydrophilicity. The leveling property of the organic siloxane resin is good, and when the planarization layer 316 is made of an organic siloxane resin material, the display substrate 31 can be planarized further.
It will be appreciated that polymer 2 is a polymer 1 which has been heated to remove the hydrophilic groups R2Thus, polymer 2 is more hydrophobic. Therefore, when the material of the pixel defining layer 311 of the display substrate 31 provided by the embodiment of the present invention includes the polymer 2, the surface of the pixel defining layer 311 is made to have high hydrophobicity, so that when the light emitting layer is formed at the opening portion of the pixel defining layer 311 by using the inkjet printing technology, ink can be prevented from flowing into the adjacent opening portion.
The embodiment of the invention also provides a preparation method of the substrate 31 for display, which can be used for preparing the substrate 31 for display. The method for manufacturing the display substrate 31 includes:
s100, forming a resin composition film on the base substrate 310 by using the resin composition of the above embodiment.
S101, patterning the resin composition film to form a pixel defining layer 311.
In the case where the resin composition film does not include a photoinitiator, patterning includes a pre-bake, a gumming, a mask exposure, a developing, an etching, a stripping, and a post-bake process; in the case where the resin composition film includes a photoinitiator, the patterning includes a pre-bake, mask exposure, development, and post-bake process.
Before development, the material of the resin composition film is polymer 1, and the hydrophilicity of polymer 1 is stronger, that is, the polarity is larger, so before development, the difference between the polarities of the flat layer 316 and the resin composition film is smaller, and according to the principle of "similar compatibility", the substance with larger polarity is easily dissolved in the substance with larger polarity, so when the resin composition film is coated on the flat layer 316, the adhesion between the resin composition film and the flat layer 316 can be ensured to be better, thereby avoiding the problem that the resin composition film falls off from the flat layer 316.
On this basis, since the patterning further includes post-baking after the developing process, the post-baking temperature is exemplified as 230 ° or more, in the embodiment of the present invention, the material of the pixel defining layer 311 formed is polymer 2, and the hydrophilic group R is removed after the polymer 2 is heated2The material of the pixel defining layer 311 is made more hydrophobic, and thus ink can be prevented from flowing into an adjacent opening portion at the time of ink jet printing.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A monomer represented by chemical formula 1:
chemical formula 1,
Figure FDA0003016949480000011
Wherein, in chemical formula 1,
R1is H or CH3，
R2Is OH or CH2OH or CH2CH2OCH2CH2OH。
2. A polymer, characterized in that the polymer is represented by chemical formula 2:
chemical formula 2,
Figure FDA0003016949480000012
Wherein, in chemical formula 2,
R1is H or CH3，
R2Is OH or CH2OH or CH2CH2OCH2CH2OH，
R3Is CH3Or CH2CH3，
m is an integer in the range of 20 to 50,
n is an integer ranging from 50 to 100.
3. A polymer, characterized in that the polymer is represented by chemical formula 3:
chemical formula 3,
Figure FDA0003016949480000021
Wherein, in chemical formula 3,
R1is H or CH3，
R3Is CH3Or CH2CH3，
m is an integer in the range of 20 to 50,
n is an integer ranging from 50 to 100.
4. A resin composition, comprising: 5-20% of fluorine-containing acrylic by weight, 1-5% of polymer by weight and organic solvent; wherein the polymer is the polymer of claim 2.
5. The resin composition according to claim 4, further comprising: 0.5-2% by weight of a photoinitiator and 0.1-1% by weight of a polymerizable monomer; the photoinitiator is a negative photosensitizer.
6. The resin composition according to claim 5,
the negative working sensitizer includes: any one or more of nitroaniline, anthraquinone, benzophenone and N-acetyl-4-nitro naphthylamine;
the polymerizable monomers include: any one or more of dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, urethane acrylate and ethoxylated pentaerythritol tetraacrylate.
7. The resin composition according to any one of claims 4 to 6, further comprising: 0.1-1% by weight of additives;
the additive comprises any one or combination of a polymerization inhibitor, a flatting agent, a defoaming agent and a stabilizing agent.
8. A substrate for display, comprising:
a substrate base plate;
a pixel defining layer disposed on the base substrate, the pixel defining layer comprising the polymer of claim 3 in a material.
9. The substrate for display use according to claim 8, further comprising:
and the flat layer is arranged on one side of the pixel defining layer close to the substrate base plate and is in contact with the pixel defining layer, wherein the material of the flat layer is organic siloxane resin.
10. An electroluminescent display device, comprising: the substrate for display according to claim 8 or 9.
11. A method for manufacturing a substrate for display, comprising:
forming a resin composition film on a base substrate using the resin composition according to any one of claims 4 to 7;
and patterning the resin composition film to form a pixel defining layer.
CN202010131663.2A 2020-02-28 2020-02-28 Monomer, polymer, resin composition, substrate, preparation method and display device Active CN111285796B (en)

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