CN110275392B

CN110275392B - Light-converting resin composition, light-converting laminate substrate, and image display device

Info

Publication number: CN110275392B
Application number: CN201910199943.4A
Authority: CN
Inventors: 金亨柱; 金正植; 申奎澈
Original assignee: Dongwoo Fine Chem Co Ltd
Current assignee: Dongwoo Fine Chem Co Ltd
Priority date: 2018-03-16
Filing date: 2019-03-15
Publication date: 2023-04-28
Anticipated expiration: 2039-03-15
Also published as: JP6908646B2; JP2019159326A; CN110275392A

Abstract

The invention provides a light conversion resin composition, a light conversion laminated substrate and an image display device. The light conversion resin composition comprises two or more types of quantum dots having luminescence center wavelengths different from each other by 50nm or more, and a binder resin, wherein the binder resin comprises a Cardo binder resin and an epoxy group-containing acrylic binder resin, the quantum dots comprise polyethylene glycol ligands disposed on the surface, and the polyethylene glycol ligands comprise a compound represented by chemical formula 1-A, thereby having excellent brightness and long-term reliability.

Description

Light-converting resin composition, light-converting laminate substrate, and image display device

Technical Field

The present invention relates to a light-converting resin composition, a light-converting laminate substrate, and an image display device using the light-converting laminate substrate.

Background

In a liquid crystal display (Liquid Crystal Display, LCD) television using a Light emitting element (Light Emitting Diode, LED) for a backlight Unit (BLU), the LED BLU is a portion that actually emits Light, and is one of the most important portions in the LCD television.

As a method of forming a white LED BLU, a white LED BLU is generally formed by combining Red (Red, R), green (G), and Blue (B) LED chips, or a white LED BLU is generally formed by using a combination of a Blue LED chip and a Yellow (Y) phosphor having an emission wavelength of a wide half-value width.

However, in the case of combining red, green, and blue LED chips, there is a problem in that the manufacturing cost is high due to the number of LED chips and complicated processes, and in the case of combining a yellow phosphor and a blue LED chip, there is a problem in that the color purity is poor and the color reproducibility is lowered as a result of the inability to distinguish between the green and red wavelengths, and thus, recently, there has been an attempt to improve the color reproducibility and the brightness of an image display device by applying an optical film including quantum dots to a backlight using a blue LED chip.

However, in the manufacture of the coating composition, a ligand of a compound having very low polarity is used and a solvent such as toluene, hexane, chloroform or the like is inevitably used, so that there is an inconvenience in that an operator has to perform an operation in an environment exposed to a solvent harmful to the human body.

In the case of the optical film, the structure of the barrier layer, the base material layer, and the like becomes complicated in addition to the light-emitting layer including the quantum dots, and the light-emitting luminance of the quantum dots is reduced due to this. Further, when a film is produced at a very high temperature in the production process, problems of quantum dot extinction occur, and in order to process into an optical film, the film is carried out at a low process temperature, and accordingly, there is a problem in terms of long-term reliability, and improvement of this is demanded.

Patent document 1 provides a quantum dot composition comprising: a quantum dot; comprising TiO ₂ Core and SiO-containing layer covering at least part of the surface of the core ₂ Scattering particles of core-shell structure of the shell portion; and a curable resin, wherein the scattering particles are 5 to 50 wt% based on the total weight of the solid components of the quantum dot composition.

Patent document 2 provides an optical sheet comprising: a polymer resin layer in which a plurality of non-cadmium quantum dots are dispersed in a polymer resin and one or both surfaces of which are patterned; a first barrier film formed on one surface of the polymer resin layer; and a second barrier film formed on the other surface of the polymer resin layer, wherein the lower surface of the polymer resin layer is prism-patterned or lens-patterned, and when the lower surface of the polymer resin layer is prism-patterned, the pitch of the prism patterns is 20-70 [ mu ] m, the apex angle is 95-120 DEG, and the cross section of the patterns is triangular; when the lower surface of the polymer resin layer is patterned by a lens, the pitch of the lens pattern is 20 to 70 μm, the ratio of the pitch to the height is 4:1 to 10:1, and the cross section of the pattern is semicircular.

In addition, in the case of the optical sheet, the structure becomes complicated, thereby causing a decrease in the light emission luminance of the quantum dots, and a low firing temperature, and thus a problem of poor long-term reliability occurs.

Prior art literature

Patent literature

Patent document 1: korean patent registration No. 10-1718592

Patent document 2: korean patent registration No. 10-1690624

Disclosure of Invention

Problems to be solved by the invention

The present invention was made in view of the above-described problems, and an object thereof is to provide a light-converting resin composition, a light-converting laminated substrate, and an image display device using the light-converting laminated substrate, each of which comprises a Cardo binder resin and an epoxy group-containing acrylic binder resin and is excellent in luminance and long-term reliability.

Another object of the present invention is to provide a light-converting resin composition, a light-converting laminate substrate, and an image display device using the light-converting laminate substrate, each of which contains two or more kinds of quantum dots having luminescence center wavelengths different from each other by 50nm or more and into which new ligands are introduced, thereby having excellent dispersibility and optical characteristics.

Means for solving the problems

The light conversion resin composition of the present invention for achieving the above object is characterized by comprising two or more types of quantum dots having luminescence center wavelengths differing from each other by 50nm or more, and a binder resin comprising a Cardo binder resin and an epoxy group-containing acrylic binder resin, wherein the quantum dots comprise polyethylene glycol ligands disposed on the surface, and the polyethylene glycol ligands comprise a compound represented by the following chemical formula 1-a.

[ chemical formula 1-A ]

(in the above chemical formula 1-A,

r' is represented by the formula 1-1,

[ chemical formula 1-1]

＊-R1-O-R2

In the above-mentioned chemical formula 1-1,

r1 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

r2 is represented by the chemical formula 1-2,

[ chemical formulas 1-2]

In the above-mentioned chemical formula 1-2,

a is an oxygen atom or a sulfur atom,

r3 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

b is mercapto (-SH) or carboxylic acid

Dithioacetic acid->

Phosphate radical->

Or an amine group (-NH) ₂ )，

R' is a hydrogen atom, a mercapto group (-SH) or a carboxylic acid group

Dithioacetic acid->

Phosphate radical->

Amino (-NH) ₂ ) A linear alkyl group having 1 to 20 carbon atoms or a branched alkyl group having 3 to 20 carbon atoms,

k is an integer of 1 to 100,

l is an integer of 0 to 1,

m is an integer of 0 to 10).

Effects of the invention

The light conversion resin composition of the present invention comprises a Cardo binder resin and an epoxy group-containing acrylic binder resin, and thus has the effect of being able to be processed efficiently at a coating formation temperature of 100 to 250 degrees, and being excellent in luminance characteristics and long-term reliability.

The light-converting resin composition of the present invention has an effect of excellent dispersibility and optical characteristics by containing two or more kinds of quantum dots having luminescence center wavelengths different from each other by 50nm or more and having new ligands introduced therein.

The light conversion laminated substrate produced from the light conversion resin composition has an effect of excellent reliability, and an image display device using the light conversion laminated substrate.

Detailed Description

The present invention will be described in more detail below.

In the present invention, when it is noted that a certain member is "on" another member, it includes not only the case where the certain member is in contact with the other member but also the case where the other member exists between the two members.

In the present invention, when a certain component is indicated as being "included" in a certain section, it means that other components may be further included, not excluded, unless otherwise stated.

Light-converting resin composition

The light conversion resin composition of the present invention is characterized by comprising two or more types of quantum dots having luminescence center wavelengths differing from each other by 50nm or more, and a binder resin, wherein the binder resin comprises a Cardo binder resin and an epoxy group-containing acrylic binder resin, the quantum dots comprise polyethylene glycol ligands disposed on the surface, and the polyethylene glycol ligands comprise a compound represented by the following chemical formula 1-a.

[ chemical formula 1-A ]

(in the above chemical formula 1-A,

r' is represented by the formula 1-1,

[ chemical formula 1-1]

＊-R1-O-R2

In the above-mentioned chemical formula 1-1,

r1 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

r2 is represented by the chemical formula 1-2,

[ chemical formulas 1-2]

In the above-mentioned chemical formula 1-2,

a is an oxygen atom or a sulfur atom,

r3 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

b is mercapto (-SH) or carboxylic acid

Dithioacetic acid->

Phosphoric acid group

Or an amine (-NH) ₂ )，

R' is a hydrogen atom, a mercapto group (-SH) or a carboxylic acid group

Dithioacetic acid->

Phosphate radical->

k is an integer of 1 to 100,

l is an integer of 0 to 1,

m is an integer of 0 to 10).

Quantum dot

The light-converting resin composition of the present invention comprises two or more kinds of quantum dots having luminescence center wavelengths differing from each other by 50nm or more, wherein the quantum dots comprise polyethylene glycol ligands disposed on the surface, and the polyethylene glycol ligands comprise a compound represented by the following chemical formula 1-A.

[ chemical formula 1-A ]

(in the above chemical formula 1-A,

r' is represented by the formula 1-1,

[ chemical formula 1-1]

＊-R1-O-R2

In the above-mentioned chemical formula 1-1,

r1 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

R2 is represented by the chemical formula 1-2,

[ chemical formulas 1-2]

In the above-mentioned chemical formula 1-2,

a is an oxygen atom or a sulfur atom,

r3 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

b is mercapto (-SH) or carboxylic acid

Dithioacetic acid->

Phosphoric acid group

Or an amine group (-NH) ₂ )，

R' is a hydrogen atom, a mercapto group (-SH) or a carboxylic acid group

Dithioacetic acid->

Phosphate radical->

k is an integer of 1 to 100,

l is an integer of 0 to 1,

m is an integer of 0 to 10).

The quantum dots contained in the light-converting resin composition of the present invention are nano-sized semiconductor substances. While atoms constitute molecules and molecules constitute clusters of small molecules to form nanoparticles, such nanoparticles are called quantum dots when they have the characteristics of semiconductors in particular. Such a quantum dot has a characteristic of spontaneously releasing energy corresponding to the band gap if it receives energy from the outside and becomes an excited state. In summary, the light conversion resin composition of the present invention can perform light conversion into green light and red light by the incident blue light source by including such quantum dots.

The quantum dot is not particularly limited as long as it can emit light by stimulation with light, but is preferably a non-cadmium type, and for example, one or more selected from group ii-VI semiconductor compounds, group III-V semiconductor compounds, group IV-VI semiconductor compounds, and group IV elements or group IV element-containing compounds can be used.

The group II-VI semiconductor compound may be at least one selected from the group consisting of a two-element compound, a three-element compound and a four-element compound, and the two-element compound may be selected from the group consisting of CdS, cdSe, cdTe, znS, znSe, znTe, znO, hgS, hgSe, hgTe and a mixture thereof; the above-mentioned ternary element compound is selected from the group consisting of CdSeS, cdSeTe, cdSTe, znSeS, znSeTe, znSTe, hgSeS, hgSeTe, hgSTe, cdZnS, cdZnSe, cdZnTe, cdHgS, cdHgSe, cdHgTe, hgZnS, hgZnSe, hgZnTe and their mixtures; the four element compound is selected from the group consisting of CdZnSeS, cdZnSeTe, cdZnSTe, cdHgSeS, cdHgSeTe, cdHgSTe, hgZnSeS, hgZnSeTe, hgZnSTe and mixtures thereof.

The group iii-V semiconductor compound may be one or more selected from the group consisting of a two-element compound, a three-element compound, and a four-element compound, and the two-element compound may be selected from the group consisting of GaN, gaP, gaAs, gaSb, alN, alP, alAs, alSb, inN, inP, inAs, inSb and a mixture thereof; the above-mentioned ternary element compound is selected from the group consisting of GaNP, gaNAs, gaNSb, gaPAs, gaPSb, alNP, alNAs, alNSb, alPAs, alPSb, inNP, inNAs, inNSb, inPAs, inPSb, gaAlNP and their mixtures; the four element compound is selected from the group consisting of GaAlNAs, gaAlNSb, gaAlPAs, gaAlPSb, gaInNP, gaInNAs, gaInNSb, gaInPAs, gaInPSb, inAlNP, inAlNAs, inAlNSb, inAlPAs, inAlPSb and mixtures thereof.

The group iv-vi semiconductor compound may be one or more selected from the group consisting of a two-element compound, a three-element compound, and a four-element compound, and the two-element compound is selected from the group consisting of SnS, snSe, snTe, pbS, pbSe, pbTe and a mixture thereof; the above-mentioned ternary element compound is selected from the group consisting of SnSeS, snSeTe, snSTe, pbSeS, pbSeTe, pbSTe, snPbS, snPbSe, snPbTe and their mixtures; the four element compound is selected from the group consisting of SnPbSSe, snPbSeTe, snPbSTe and mixtures thereof.

The group iv element or group iv element-containing compound may be one or more selected from the group consisting of a single element compound and a binary element compound, and the single element compound is selected from the group consisting of Si, ge, and a mixture thereof; the binary compound is selected from the group consisting of SiC, siGe, and a mixture thereof, but is not limited thereto.

The quantum dots may be of homogeneous (homogeneous) single structure; a core-shell (core-shell) structure, a gradient (gradient) structure, and the like; or a hybrid thereof. For example, in the above-described dual structure of core-shell (core-shell), the substances constituting each core and shell may be formed of the above-mentioned semiconductor compounds different from each other. More specifically, the core may include one or more selected from the group consisting of a two-element compound, a three-element compound, and a four-element compound, but is not limited thereto, and the two-element compound is selected from the group consisting of GaN, gaP, gaAs, gaSb, alN, alP, alAs, alSb, inN, inP, inAs, inSb and a mixture thereof; the above-mentioned ternary element compound is selected from the group consisting of GaNP, gaNAs, gaNSb, gaPAs, gaPSb, alNP, alNAs, alNSb, alPAs, alPSb, inNP, inNAs, inNSb, inPAs, inPSb, gaAlNP and their mixtures; the four element compound is selected from the group consisting of GaAlNAs, gaAlNSb, gaAlPAs, gaAlPSb, gaInNP, gaInNAs, gaInNSb, gaInPAs, gaInPSb, inAlNP, inAlNAs, inAlNSb, inAlPAs, inAlPSb and mixtures thereof. The shell may contain one or more selected from ZnSe, znS, and ZnTe, but is not limited thereto.

Examples of the quantum dot having the core-shell structure include InP/ZnS, inP/ZnSe, inP/GaP/ZnS, inP/ZnSe/ZnS, inP/ZnSeTe/ZnS, and InP/MnSe/ZnS.

The quantum dots may be synthesized by a wet chemical process (wet chemical process), an organometallic chemical vapor deposition process (MOCVD, metalorganic chemical vapor deposition), or a molecular beam epitaxy process (MBE, molecular beam epitaxy), but are not limited thereto.

In the present invention, the quantum dot may be a non-cadmium quantum dot. Specifically, the quantum dot may include a non-cadmium quantum dot.

In the present invention, when the quantum dot is a non-cadmium quantum dot, the risk of environmental pollution can be suppressed, and the quantum dot is harmless to the human body, and thus has the advantage of being able to include the health of an operator who operates the quantum dot, which is preferable.

The non-cadmium quantum dots may include two or more types of quantum dots having luminescence center wavelengths different from each other, specifically, 50nm or more, in order to convert light into green light and red light using an incident blue light source. Preferably, the non-cadmium quantum dot may include two or more types of quantum dots having luminescence center wavelengths different from each other by 70nm or more.

When the difference in the emission center wavelength of the two or more types of non-cadmium quantum dots is within the above range, there is an advantage that a display having excellent image quality can be provided due to wide color reproducibility.

Among the above-mentioned non-cadmium quantum dots, the above-mentioned quantum dots are used as green quantum dots having a luminescence center wavelength in a range of 510nm to 540nm and as red quantum dots having a luminescence center wavelength in a range of 610nm to 630nm, which are effective for realizing excellent color reproducibility. Preferably, the quantum dots may include the green quantum dots and the red quantum dots having a luminescence center wavelength in the above range, which has the following advantages: by applying quantum dots each satisfying the above emission wavelength, use of a color filter of a white light source formed by blue transmission light, green emission, and red emission of a blue light source can be achieved, and thus a display device having wide color reproducibility can be provided.

The polyethylene glycol ligand is disposed on the surface of the quantum dot by chemical bonding.

Specifically, the quantum dot of the present invention comprises a polyethylene glycol ligand containing a compound represented by the following chemical formula 1-a, which is disposed on the surface. Specifically, the polyethylene glycol ligand is disposed on the surface of the quantum dot by chemical bonding.

[ chemical formula 1-A ]

(in the above chemical formula 1-A,

r' is represented by the formula 1-1,

[ chemical formula 1-1]

＊-R1-O-R2

In the above-mentioned chemical formula 1-1,

r1 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

r2 is represented by the chemical formula 1-2,

[ chemical formulas 1-2]

In the above-mentioned chemical formula 1-2,

a is an oxygen atom or a sulfur atom,

r3 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

b is mercapto (-SH) or carboxylic acid

Dithioacetic acid->

Phosphoric acid group

Or an amine group (-NH) ₂ )，

R' is a hydrogen atom, a mercapto group (-SH) or a carboxylic acid group

Dithioacetic acid->

Phosphoric acid group

k is an integer of 1 to 100,

l is an integer of 0 to 1,

m is an integer of 0 to 10).

In the present invention, the alkyl group may be a straight chain or branched chain, and examples thereof include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2-dimethylheptyl, 1-ethyl-propyl, 1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl and the like, but are not limited thereto.

In the present invention, the alkylene group is not limited to the 2-valent one, and the description about the alkyl group can be applied.

In the present invention, the above-mentioned formulae represent a linking group.

The compound represented by the above chemical formula 1-a may be represented by the following chemical formula 1-3.

[ chemical formulas 1-3]

(in the above chemical formulas 1 to 3,

r' is mercapto (-SH) or carboxylic acid

Dithioacetic acid->

Phosphoric acid group

o is an integer of 0 to 5,

p is an integer of 0 to 1,

q is an integer of 1 to 50).

In the case of quantum dots containing a ligand such as oleic acid (oleic acid) or oleylamine (oleylamine), the quantum dots are well dispersed in a highly volatile nonpolar solvent such as hexane (n-hexane) or chloroform, but there is a problem that dispersibility in a propylene glycol solvent such as Propylene Glycol Methyl Ether Acetate (PGMEA) used in the production of a resist or in the production of a display element is very weak in general. However, the quantum dot of the present invention is preferable because it is easy to handle and can further protect the health of the operator because it uses a polyethylene glycol ligand and is well dispersed in a solvent such as PGMEA, and in particular, when the compound represented by the chemical formula 1-3 is used as the compound represented by the chemical formula 1-a, the above advantage is maximized.

Specific examples of the polyethylene glycol ligands include 2- (2-methoxyethoxy) acetic acid (and optical company), 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid (and optical company), succinic acid mono- [2- (2-methoxy-ethoxy) -ethyl ] ester, malonic acid mono- [2- (2-methoxy-ethoxy) -ethyl ] ester, glutaric acid mono- {2- [2- (2-ethoxy) -ethoxy ] -ethyl } ester, {2- [2- (2-ethyl-hexyloxy) -ethoxy ] -ethoxy } -acetic acid, succinic acid mono- [2- (2- {2- [2- (2- {2- [2- (2-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethoxy ] -ethyl ] ester, succinic acid mono- [2- (2- {2- [2- (2-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] ester, mono- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] succinate, mono- [2- (2- {2- [2- (2-isobutoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] malonate, mono- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] adipate, 6- (2- {2- [2- (2-ethoxy) -ethoxy ] -ethoxy } -ethyl) -o-f-date, mono- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] -ethoxy } -e-of succinic acid, O- (succinyl) -O '-methylpolyethylene glycol 2'000 (aldrich company), (2-butoxy-ethoxy) -acetic acid ((2-butoxy-ethoxy) -acetic acid (and optical company), {2- [2- (carboxymethoxy) ethoxy ] ethoxy } acetic acid (and optical company), 2- [2- (benzyloxy) ethoxy ] acetic acid, (2-carboxymethoxy-ethoxy) -acetic acid (and optical company), (2-butoxy-ethoxy) -acetic acid ((2-butoxy-ethoxy) -acetic acid (and optical company), and the like, but are not limited thereto.

The use of the polyethylene glycol ligand for the non-cadmium quantum dot can provide excellent dispersion characteristics of the quantum dot even if a solvent such as propylene glycol monomethyl ether acetate used in a mass production line of color filters is used instead of a solvent having high volatility such as toluene, hexane, or chloroform.

The content of the non-cadmium quantum dot containing the polyethylene glycol ligand is 5% to 150%, and more preferably 10% to 100%, based on the whole quantum dot. When the content of the non-cadmium quantum dot containing the polyethylene glycol ligand is less than the above range, the dispersion characteristics of the quantum dot may be poor, and when the content is more than the above range, the dispersion characteristics of the quantum dot are excellent, but the curing characteristics of the coating film may be lowered, so that the content is preferably satisfied.

The content of the quantum dots may be 1 to 40 parts by weight, preferably 2 to 20 parts by weight, based on 100 parts by weight of the solid content of the light-converting resin composition. When the content of the quantum dot is within the above range, there is an advantage that the light-emitting efficiency is excellent and the reliability of the coating layer is excellent. When the content of the quantum dots is less than the above range, the light conversion efficiency of green light and red light is insufficient, and when the content is greater than the above range, the emission of blue light is relatively lowered, and the color reproducibility is deteriorated.

Adhesive resin

The light-converting resin composition of the present invention contains a binder resin, which may contain a thermosetting resin or an alkali-soluble resin. Specifically, the binder resin may contain an epoxy group-containing acrylic binder resin and a Cardo binder resin as a thermosetting resin or an alkali-soluble resin.

The epoxy group-containing acrylic adhesive resin may contain at least one repeating unit of the following chemical formulas 2 to 4.

[ chemical formula 2]

[ chemical formula 3]

[ chemical formula 4]

(in the above chemical formulas 2 to 4,

r4, R5 and R6 are each independently hydrogen or methyl).

In the case of an epoxy group-containing acrylic binder resin having at least one repeating unit of the above chemical formulas 2 to 4, color reproducibility and reliability can be improved by excellent mechanical properties and excellent light conversion efficiency and excellent light maintenance efficiency of the light conversion resin composition.

The Cardo binder resin has reactivity by the action of light and heat, and functions as a dispersion medium for quantum dots. The Cardo-based binder resin contained in the light-converting resin composition of the present invention is not limited as long as it functions as a binder resin for quantum dots and can be used as a support for the light-converting coating layer.

The Cardo-based binder resin may include at least one repeating unit of the following chemical formulas 5 to 10.

[ chemical formula 5]

[ chemical formula 6]

[ chemical formula 7]

[ chemical formula 8]

In the above-mentioned chemical formulas 5 to 8,

x and X' are each independently a single bond, -CO-, -SO ₂ -、-C(CF ₃ ) ₂ -、-Si(CH ₃ ) ₂ -、-CH ₂ -、-C(CH ₃ ) ₂ -、-O-、

Y is an anhydride residue which is a group,

z is an acid dianhydride residue, and Z is an acid dianhydride residue,

r' "is a hydrogen atom, ethyl, phenyl, -C ₂ H ₄ Cl、-C ₂ H ₄ OH or-CH ₂ CH＝CH ₂ ，

R7, R7', R8', R9', R10', R11', R12 and R12' are each independently a hydrogen atom or a methyl group,

r13, R13', R14 and R14' are each independently a linear alkylene group having 1 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms, and the alkylene group may be interrupted by at least one of an ester bond, a cycloalkylene group having 6 to 14 carbon atoms and an arylene group having 6 to 14 carbon atoms,

r15, R15', R16', R17', R18 and R18' are each independently a hydrogen atom, a halogen atom or a linear alkyl group having 1 to 6 carbon atoms or a branched alkyl group having 3 to 6 carbon atoms,

r and s are integers satisfying 0.ltoreq.m.ltoreq.30 and 0.ltoreq.n.ltoreq.30 respectively,

wherein r and s are not both 0.

[ chemical formula 9]

[ chemical formula 10]

In the above-mentioned chemical formulas 9 and 10,

p is each independently

R19 and R20 are each independently hydrogen, hydroxyl, thiol, amino, nitro or halogen atom,

ar1 is independently a C6-C15 aryl group,

y' is an anhydride residue which is a group,

z' is an acid dianhydride residue,

a' is O, S, N, si or Se,

a and b are each independently integers of 1 to 6,

c and d are each independently integers from 0 to 30,

wherein c and d are not both 0.

When the light-converting resin composition of the present invention contains a Cardo-based binder resin having at least one of the repeating units of the above chemical formulas 5 to 10, there is an advantage that the inter-process reliability becomes excellent, the generation of outgas is minimized, no afterimage is generated at the time of panel start-up, and high-quality image quality, excellent heat resistance, chemical resistance, durability, and reliability can be imparted due to the excellent reflection preventing effect.

Y in the above chemical formulas 5 and 7 is a residue of an acid anhydride, and can be obtained by reacting a bisphenol epoxy acrylate compound, which is a synthetic intermediate of the Cardo binder resin of the present invention, with an acid anhydride compound. The acid anhydride compound capable of introducing the residue Y is not particularly limited, and examples thereof include maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl endomethylene tetrahydrophthalic anhydride, chlorendic anhydride, methyl tetrahydrophthalic anhydride, and the like.

Z in the above chemical formulas 6 and 8 is a residue of an acid dianhydride, and can be obtained by reacting a bisphenol epoxy acrylate compound, which is a synthesis intermediate of the Cardo binder resin of the present invention, with an acid dianhydride compound. The acid dianhydride compound into which the residue Z can be introduced is not particularly limited, and examples thereof include aromatic polycarboxylic acid anhydrides such as pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, biphenyl tetracarboxylic dianhydride, and biphenyl tetracarboxylic dianhydride.

The above-mentioned "acid dianhydride" means a compound having 2 acid anhydride groups in the molecule.

In the present invention, the method for producing the Cardo-based binder resin is not particularly limited. For example, the bisphenol compound may be produced by reacting an epoxy compound with a bisphenol compound, synthesizing a bisphenol epoxy compound, then reacting the synthesized bisphenol epoxy compound with an acrylate compound, synthesizing a bisphenol epoxy acrylate compound, and then reacting the bisphenol epoxy acrylate compound with an acid anhydride, an acid dianhydride, or a mixture thereof, but is not limited thereto.

The weight ratio of the Cardo-based binder resin to the epoxy-containing acrylic binder resin may be 10:90 to 90:10. When the ratio of the Cardo-based binder resin to the epoxy-containing acrylic-based binder resin is within the above range, there is an advantage that the physical properties of the coating film are excellent due to excellent thermosetting properties of the coating film in the post-baking heat treatment step after coating, and when the ratio is outside the above range, the curing degree of the coating film is insufficient and the reliability may be lowered.

The content of the binder resin may be 1 to 40 parts by weight, preferably 1 to 30 parts by weight, and more preferably 2 to 10 parts by weight, based on 100 parts by weight of the entire light-converting resin composition. When the content of the binder resin is within the above range, the heat curing is easy, the film is prevented from decreasing during the heat curing, and the coating film characteristics are good, which is preferable. When the content of the binder resin is less than the above range, the film strength may be reduced due to insufficient curing degree, and when the content of the binder resin is more than the above range, the coatability may be reduced, and it may be difficult to form a uniform coating film.

Scattering particles

The light-converting resin composition of the present invention may contain scattering particles.

The scattering particles may be made of a common inorganic material, and preferably may contain a metal oxide having an average particle diameter of 50 to 1,000 nm.

Specifically, the metal oxide may be selected from the group consisting of Al ₂ O ₃ 、SiO ₂ 、ZnO、ZrO ₂ 、BaTiO ₃ 、TiO ₂ 、Ta ₂ O ₅ 、Ti ₃ O ₅ 、ITO、IZO、ATO、ZnO-Al、Nb ₂ O ₃ SnO, mgO, and combinations thereof. If necessary, a material surface-treated with a compound having an unsaturated bond such as an acrylate may be used.

In addition, in the case where the light conversion resin composition of the present invention contains scattering particles, the scattering particles are preferable because the path of light emitted from the quantum dots can be increased and the overall light efficiency on the light conversion coating can be improved.

The scattering particles may have an average particle diameter of 50 to 1,000nm, and preferably, scattering particles in the range of 100 to 500nm are used. In this case, if the particle size is too small, a sufficient scattering effect of light emitted from the quantum dots cannot be expected, whereas if it is too large, precipitation in the composition or uniform quality of the self-luminous layer surface cannot be obtained, and thus the use can be appropriately adjusted within the above-mentioned range.

The content of the scattering particles may be 0.5 to 20 parts by weight, preferably 1 to 15 parts by weight, based on 100 parts by weight of the total solid content of the light-converting resin composition. When the content of the scattering particles is within the above range, the effect of increasing the luminous intensity can be maximized, which is preferable. When the content of the scattering particles is less than the above range, it may be difficult to ensure the desired luminous intensity, and when it is more than the above range, the transmittance of the blue irradiation light is lowered, and the luminous efficiency may be problematic, so that it is preferable to use it appropriately within the above range.

Thermosetting compound

The light-converting resin composition of the present invention may contain a thermosetting compound.

The average molecular weight of the thermosetting compound is preferably 20,000 or less, and particularly preferably 1,000 to 20,000. When the average molecular weight of the thermosetting compound satisfies the above conditions, the film retention and heat resistance are excellent.

The thermosetting compound is preferably composed of 10 to 80 parts by weight of an epoxy compound based on 100 parts by weight of the entire light-converting resin composition. When the content of the thermosetting compound is less than the above range, there is a possibility that the reliability may be lowered due to insufficient strength of the coating film.

Specific examples of the thermosetting compound satisfying the above conditions include a mixture of 2- [4- (2, 3-glycidoxy) phenyl ] -2- [4- [1, 1-bis [4- ([ 2, 3-glycidoxy ] phenyl) ] ethyl ] phenyl ] propane and 1, 3-bis [4- [1- [4- (2, 3-glycidoxy) phenyl ] -1- [4- [1- [4- (2, 3-glycidoxy) phenyl) -1-methylethyl ] phenyl ] ethyl ] phenoxy ] -2-propanol, 2- [4- (2, 3-glycidoxy) phenyl ] -2- [4- [1, 1-bis [4- ([ 2, 3-glycidoxy ] phenyl) ] ethyl ] phenyl ] propane, and the like. Examples of commercial products include JER S157S 65 and 157S70 (trade name; JER product). They may be used each alone or in combination of two or more.

The thermosetting compound of the present invention may further contain an epoxy resin other than the bisphenol a novolac type epoxy compound. As preferable examples of the epoxy resin which can be used together with the bisphenol a novolac type epoxy resin, bisphenol a type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, diphenyl ether type epoxy resin, hydroquinone type epoxy resin, naphthalene type epoxy resin, biphenyl type epoxy resin, fluorene epoxy resin, phenol novolac type epoxy resin, o-cresol novolac type epoxy resin, trihydroxy phenyl methane type epoxy resin, trifunctional type epoxy resin, tetraphenolethane type epoxy resin, dicyclopentadiene phenol type epoxy resin, hydrogenated bisphenol a type epoxy resin, bisphenol a nucleus-containing polyol type epoxy resin, polypropylene glycol type epoxy resin, glycidyl ester type epoxy resin, glycidol type epoxy resin, glyoxal type epoxy resin, alicyclic multifunctional epoxy resin, heterocyclic type epoxy resin, and the like can be used. These epoxy resins may be used singly or in combination with the above bisphenol a novolac type epoxy resins.

The following commercially available epoxy resins can be used. More specifically, the process is carried out, examples thereof include YDF-175S (product of Dongdu chemical Co., ltd.) as a bisphenol F type epoxy resin, YDB-715 (product of Dongdu chemical Co., ltd.) as a bisphenol A type epoxy resin, EPICLON EXA1514 (product of Dain ink chemical Co., ltd.) as a bisphenol S type epoxy resin, YDC-1312 (product of Dongdu chemical Co., ltd.) as a hydroquinone type epoxy resin, EPICLON EXA4032 (product of Dain ink chemical Co., ltd.) as a naphthalene type epoxy resin, EPIKOTE YX4000H (product of Dain ink chemical Co., ltd.) as a biphenyl type epoxy resin, JER S65 or 157S70 (product of JER Co., ltd.) as a bisphenol A novolac type epoxy resin, EPPN-201 (product of Japan chemical Co., ltd.) as a phenol novolac type epoxy resin, etc JER, 154 (product of JER corporation), EOCN-102S, 103S, 104S or 1020 (product of Japanese chemical Co., ltd.) as a cresol novolak type epoxy resin, EPIKOTE 1032H60 (product of JER corporation) as a trihydroxy phenyl methane type epoxy resin, VG3101M80 (product of Sanjing chemical Co., ltd.) as a trifunctional type epoxy resin, EPIKOTE 10315 (product of JER corporation) as a tetraphenolethane type epoxy resin, ST-3000 (product of Dongdu chemical Co., ltd.) as a hydrogenated bisphenol A type epoxy resin, EPIKOTE 190P (product of JER corporation) as a glycidyl ester type epoxy resin, YH-434 (product of Dongdu chemical Co., ltd.) as a glycidyl amine type epoxy resin, etc, YDG-414 (product of Dongdu chemical Co.) as glyoxal type epoxy resin, EPOLEAD GT-401 (product of Dairy celluloid chemical Co.) as alicyclic polyfunctional epoxy resin, and the like. The above epoxy resins may be used each alone or in combination of two or more.

The content of the thermosetting compound is preferably 10 to 80% by weight, more preferably 15 to 70% by weight, based on 100% by weight of the solid content of the light-converting resin composition. When the content of the thermosetting compound is within the above range, the film retention and flatness are good.

Curing accelerator

The light-converting resin composition of the present invention may contain a curing accelerator.

The curing accelerator may preferably be one or more compounds selected from the group consisting of carboxylic acid compounds, organic sulfur compounds having a thiol group, and acid generators, for example, but is not limited thereto.

The carboxylic acid compound is preferably an aromatic heteroacetic acid, and specific examples thereof include phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenyl thioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, naphthyloxyacetic acid, 1,2, 4-trimellitic anhydride, and the like, but are not limited thereto.

Specific examples of the organic sulfur compound having a thiol group include 2-mercaptobenzothiazole, 1, 4-bis (3-mercaptobutyryloxy) butane, 1,3, 5-tris (3-mercaptobutoxyethyl) -1,3, 5-triazine-2, 4,6 (1H, 3H, 5H) -trione, trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetrakis (3-mercaptobutyrate), pentaerythritol tetrakis (3-mercaptopropionate), dipentaerythritol hexa (3-mercaptopropionate), tetraethyleneglycol bis (3-mercaptopropionate), and the like, but the present invention is not limited thereto.

Specific examples of the acid generator include 4-hydroxyphenyldimethyl sulfonium p-toluenesulfonate, 4-hydroxyphenyldimethyl sulfonium hexafluoroantimonate, 4-acetoxyphenyl dimethyl sulfonium p-toluenesulfonate, 4-acetoxyphenyl methylbenzyl sulfonium hexafluoroantimonate, triphenylsulfonium p-toluenesulfonate, triphenylsulfonium hexafluoroantimonate and diphenyliodo

P-toluenesulfonate, diphenyliodo->

Hexafluoroantimonate and the like->

Salts, nitrobenzyl toluene sulfonates, benzoin toluene sulfonates, and the like.

The content of the curing accelerator may be 0.1 to 40 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the solid content of the light-converting resin composition, relative to 100 parts by weight of the binder resin and the thermosetting compound. When the content of the curing accelerator satisfies the above range, the light-converting resin composition containing the same has the advantages of high sensitivity and shortened curing time of the coating film, so that productivity is improved, high reliability can be realized, and strength of the coating film formed by using the same and surface smoothness of the coating film portion can be improved. On the other hand, when the content of the curing accelerator is less than the above range, the problem of deterioration of the curing degree and the possibility of wrinkling in the subsequent step cannot be solved, and when the content is more than the above range, the light emitting property of the light-converting resin composition is deteriorated and the brightness is insufficient.

Solvent(s)

The light-converting resin composition of the present invention may contain a solvent.

The solvent contained in the light-converting resin composition of the present invention may generally contain one or two or more kinds, and particularly when the solvent having a boiling point of 100 to 180 ℃ is contained in an amount of 50% or more relative to the total solvent, the flow characteristics are excellent, coating unevenness and drying foreign matters are not generated, and thus a good light-converting laminated substrate free from coating foreign matters can be provided.

Specific examples thereof include at least one selected from the group consisting of ethers, aromatic hydrocarbons, ketones, alcohols, esters, amides, and the like, and specifically, at least one selected from the group consisting of propylene glycol monomethyl ether acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, mesitylene, methyl amyl ketone, methyl isobutyl ketone, ethyl 3-ethoxypropionate, 1, 3-butanediol diacetate, ethyl-3-ethoxypropionate, propylene glycol diacetate, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol diethyl ether, methoxybutyl acetate, ethylene glycol, and γ -butyrolactone.

In the case where the solvent having a boiling point of less than 100 ℃ is 50% or more of the total solvent, the drying speed is high, and thus, defects may be caused by uneven surfaces of the coating film in the Vacuum drying (Vacuum Dry) step, and in the case where the solvent having a boiling point of more than 180 ℃ is 50% or more of the total solvent, the time (Tack-time) required in the Vacuum drying step may be increased. Therefore, a solvent having a boiling point of 100 to 180℃is preferably used as 50% or more of the total solvent.

The content of the solvent may be 50 to 90% by weight, and preferably 60 to 85% by weight, based on 100% by weight of the light-converting resin composition. When the content of the solvent is within the above range, the coatability can be improved when coating is performed by a coating apparatus such as a roll coater, a spin coater, a slot coater (also referred to as a die coater), or an inkjet.

Additive agent

The light-converting resin composition of the present invention may further comprise known additives according to various purposes. As such additives, for example, additives such as fillers, curing aids, other polymer compounds, adhesion promoters, antioxidants, ultraviolet absorbers, and anticoagulants may be used in combination. One or two or more of these additives may be used, and in view of light efficiency and the like, it is preferably used at 1% by weight or less in the overall composition.

Examples of the filler include glass, silica, alumina, and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane.

Specific examples of the other polymer compounds include curable resins such as maleimide resins, and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane.

Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropyl methyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-glycidoxypropyl trimethoxysilane, 3-glycidoxypropyl methyldimethoxysilane, 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyl trimethoxysilane, and 3-mercaptopropyl trimethoxysilane.

Specific examples of the antioxidant include 2,2' -thiobis (4-methyl-6-t-butylphenol) and 2, 6-di-t-butyl-4-methylphenol.

The ultraviolet absorber may be specifically 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole, alkoxybenzophenone, or the like.

Specific examples of the anti-coagulant include sodium polyacrylate.

Those skilled in the art can add the above additives appropriately within the range not to impair the effects of the present invention. For example, the additive may be used in an amount of 0.05 to 10 parts by weight, preferably 0.1 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the entire light-converting resin composition, but is not limited thereto.

< light conversion laminated substrate >)

The light conversion laminated substrate of the present invention comprises a cured product of a light conversion resin composition formed on a substrate. The light-converting laminate substrate can be processed more efficiently on a glass substrate at a coating formation temperature of 100 to 250 ℃ by containing a cured product of the light-converting resin composition, and is excellent in brightness and long-term reliability as compared with conventional complex structures.

The light conversion laminated substrate may be silicon (Si), silicon oxide (SiOx), or a polymer substrate, and the polymer substrate may be polyether sulfone (PES), polycarbonate (PC), or the like.

The light-converting laminate substrate may be formed by applying the light-converting resin composition and thermally curing the composition.

< image display device >)

The image display device of the present invention includes the light conversion laminated substrate described above. The image display device includes, in particular, a liquid crystal display (liquid crystal display device; LCD), an organic EL display (organic EL display device), a liquid crystal projector, a display device for a game machine, a display device for a portable terminal such as a mobile phone, a display device for a digital camera, a display device for a vehicle navigation, and the like, and is particularly suitable for a color display device.

The image display device may include, in addition to the light conversion laminated substrate, a configuration known to those skilled in the art of the present invention, that is, the present invention includes an image display device to which the light conversion laminated substrate of the present invention can be applied.

Hereinafter, for the purpose of specifically describing the present specification, examples will be used for the detailed description. However, the embodiments in the present specification may be modified in various other ways, and are not to be construed as limiting the scope of the present specification to the embodiments described in detail below. The embodiments in this specification are provided to more fully explain the present specification to one of ordinary skill in the art. In addition, "%" and "parts" indicating contents are weight basis as follows unless otherwise mentioned.

Manufacture of scattering particle dispersion

Production example 1: manufacture of scattering particle Dispersion S1

TiO with particle diameter of 220nm as scattering particle ₂ (Henschel Co., TR-88) 70.0 parts by weight, DISPRBYK-2001 (manufactured by Pick Co.) as a dispersant 4.0 parts by weight, and propylene glycol methyl ether acetate 26 parts by weight as a solvent were mixed/dispersed by a bead mill for 12 hours to prepare a scattering particle dispersion S1.

Synthesis example 1: synthesis of green Quantum dot (Q-1)

Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, tris (trimethylsilyl) phosphine (TMS) was rapidly injected ₃ P) 0.2mmol (58. Mu.L) and trioctylphosphine 1.0mL, and the reaction was carried out for 0.5 min.

Next, 2.4mmol (0.448 g) of zinc acetate, 4.8mmol of oleic acid, and 20mL of trioctylamine were added to the reactor, and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. 2mL of the previously synthesized InP core solution was added, followed by 4.8mmol of selenium (Se/TOP) in trioctylphosphine, and then the final mixture was allowed to react for 2 hours. Ethanol is added into the reaction solution which is rapidly cooled to normal temperature, the precipitate obtained by centrifugal separation is filtered under reduced pressure, and then dried under reduced pressure, so as to form InP/ZnSe core-shell.

Next, 2.4mmol (0.448 g) of zinc acetate, 4.8mmol of oleic acid, and 20mL of trioctylamine were added to the reactor, and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. 2mL of the previously synthesized InP core solution was added, followed by 4.8mmol of sulfur (S/TOP) in trioctylphosphine, and then the final mixture was allowed to react for 2 hours. Ethanol is added into the reaction solution which is rapidly cooled to normal temperature, the precipitate obtained by centrifugal separation is subjected to reduced pressure filtration, then reduced pressure drying is carried out, and quantum dots with InP/ZnSe/ZnS core-shell structures are obtained and then dispersed in chloroform.

The maximum luminescence peak of the luminescence spectrum of the obtained nano quantum dot is 515nm, and 5mL of quantum dot solution is added into a centrifugal separation tube, and 20mL of ethanol is added to precipitate the quantum dot solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, then 0.50g of (2-butoxy-ethoxy) -acetic acid was added, and the reaction was carried out while heating at 60℃under a nitrogen atmosphere for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 516nm.

Synthesis example 2: synthesis of green quantum dot (Q-2)

5mL of the chloroform-dispersed quantum dot solution synthesized in Synthesis example 1 was added to a centrifugal separation tube, and 20mL of ethanol was added to precipitate the solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.5g of O- (succinyl) -O '-methylpolyethylene glycol 2'000 (Aldrich Co.) was added thereto, and the mixture was heated at 60℃under a nitrogen atmosphere while carrying out the reaction for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 515nm.

Synthesis example 3: synthesis of green quantum dot (Q-3)

Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, tris (trimethylsilyl) phosphine (TMS) was rapidly injected ₃ P) 0.2mmol (58. Mu.L) and trioctylphosphine 1.0mL, and the reaction was carried out for 1 minute.

The maximum luminescence peak of the luminescence spectrum of the obtained nano quantum dot is 526nm, 5mL of quantum dot solution is added into a centrifugal separation tube, and 20mL of ethanol is added to precipitate the quantum dot solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, then 0.50g of (2-butoxy-ethoxy) -acetic acid was added, and the reaction was carried out while heating at 60℃under a nitrogen atmosphere for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 526nm.

Synthesis example 4: synthesis of green Quantum dot (Q-4)

5mL of the chloroform-dispersed quantum dot solution synthesized in Synthesis example 3 was added to a centrifugal separation tube, and 20mL of ethanol was added to precipitate the solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.5g of O- (succinyl) -O '-methylpolyethylene glycol 2'000 (Aldrich Co.) was added thereto, and the mixture was heated at 60℃under a nitrogen atmosphere while carrying out the reaction for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 525nm.

Synthesis example 5: synthesis of green quantum dot (Q-5)

Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, tris (trimethylsilyl) phosphine (TMS) was rapidly injected ₃ P) 0.2mmol (58. Mu.L) and trioctylphosphine 1.0mL, and the reaction was carried out for 1.5 minutes.

The maximum luminescence peak of the luminescence spectrum of the obtained nano quantum dot is 526nm, 5mL of quantum dot solution is added into a centrifugal separation tube, and 20mL of ethanol is added to precipitate the quantum dot solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.65g of carboxy-EG 6-undecanethiol (Aldrich Co.) was added thereto, and the reaction was carried out while heating at 60℃under a nitrogen atmosphere for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 536nm.

Synthesis example 6: synthesis of green Quantum dot (Q-6)

5mL of the chloroform-dispersed quantum dot solution synthesized in Synthesis example 5 was added to a centrifugal separation tube, and 20mL of ethanol was added to precipitate the solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.5g of O- (succinyl) -O '-methylpolyethylene glycol 2'000 (Aldrich Co.) was added thereto, and the mixture was heated at 60℃under a nitrogen atmosphere while carrying out the reaction for 1 hour.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugal separation was performed to separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 534nm.

Synthesis example 7: synthesis of Red Quantum dot (Q-7)

Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, tris (trimethylsilyl) phosphine (TMS) was rapidly injected ₃ P) 0.2mmol (58. Mu.L) and trioctylphosphine 1.0mL, and the reaction was carried out for 5 minutes, and then the reaction solution was rapidly cooled to room temperature. Exhibiting an absorption maximum wavelength of 560 to 590nm.

2.4mmol (0.448 g) of zinc acetate, 4.8mmol of oleic acid and 20mL of trioctylamine were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. 2mL of the previously synthesized InP core solution was added, followed by addition of 4.8mmol of selenium (Se/TOP) in trioctylphosphine, and then the final mixture was allowed to react for 2 hours, after which it was cooled to room temperature to form an InP/ZnSe core-shell.

The maximum luminescence peak of the luminescence spectrum of the obtained nano quantum dot is 628nm, 5mL of synthesized quantum dot solution is added into a centrifugal separation tube, and 20mL of ethanol is added to precipitate the quantum dot solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.65g of 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid (and optical Co.) was added, and the reaction was carried out while heating at 60℃under a nitrogen atmosphere.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugation was performed to remove the supernatant and separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 628nm.

Synthesis example 8: synthesis of Red Quantum dot (Q-8)

Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were added to the reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, tris (trimethylsilyl) phosphine (TMS) was rapidly injected ₃ P) 0.2mmol (58. Mu.L) and trioctylphosphine 1.0mL, and the reaction was carried out for 4.5 minutes, and then the reaction solution was rapidly cooled to room temperature. Exhibits an absorption maximum wavelength of 550 to 585nm.

The maximum luminescence peak of the luminescence spectrum of the obtained nano quantum dot is 616nm, 5mL of synthesized quantum dot solution is added into a centrifugal separation tube, and 20mL of ethanol is added to precipitate the quantum dot solution. The supernatant was removed by centrifugation, 2mL of chloroform was added to the precipitate to disperse the quantum dots, and then 0.65g of 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid (and optical Co.) was added, and the reaction was carried out while heating at 60℃under a nitrogen atmosphere.

Next, 25mL of n-hexane was added to the reaction mixture to precipitate quantum dots, and then centrifugation was performed to remove the supernatant and separate the precipitate, and then 4mL of propylene glycol monomethyl ether acetate was added thereto, followed by heating at 80 ℃ and simultaneous dispersion. The solid content was adjusted to 25% with PGMEA. The maximum luminescence wavelength was 616nm.

Synthesis example 9: adhesive resin (E-1) comprising Cardo-based adhesive resin

(1) To the reactor, 138g of 9,9' -bis (4-glycidoxyphenyl) fluorene (Healchem Co.), 54g of acrylic acid, 1.4g of benzyltriethylammonium chloride (Daikovia Kagaku Co.), 1g of triphenylphosphine (Aldrich Co.), 128g of propylene glycol methyl ether acetate (Daikovia Kagaku Co.), and 0.5g of hydroquinone were charged as bisphenol epoxy compounds, and after the temperature was raised to 120℃for 12 hours, the compound represented by the following chemical formula 11 was synthesized.

(2) Into the reactor, 60g of a compound represented by the following chemical formula 11, 11g of biphenyltetracarboxylic dianhydride (Mitsubishi gas Co.), 3g of tetrahydrophthalic anhydride (Ordrich Co.), 20g of propylene glycol methyl ether acetate (David chemical Co.), and 0.1g of N, N' -tetramethyl ammonium chloride were charged, and after the temperature was raised to 120℃for 2 hours, the compound represented by the following chemical formula 12 was synthesized. The weight average molecular weight of the obtained compound represented by the following chemical formula 12 was 5,400g/mol. The acid value was 95mgKOH/g.

[ chemical formula 11]

[ chemical formula 12]

Synthesis example 10: adhesive resin (E-2) comprising Cardo-based adhesive resin

(1) To synthesize the compound of the following chemical formula 13, 364.4g of 4,4"- (9H-xanthene-9, 9-diyl) diphenol and 0.4159g of t-butylammonium bromide were mixed in a 3000ml three-necked round bottom flask, and then 2359g of epichlorohydrin was added thereto, and the mixture was heated to 90℃to carry out the reaction. Analysis was performed by liquid chromatography and if 4,4"- (9H-xanthene-9, 9-diyl) diphenol was completely consumed, it was cooled to 30℃and 50% aqueous NaOH solution (3 eq) was slowly added. Analysis was performed by liquid chromatography, and if epichlorohydrin was completely consumed, after extraction with methylene chloride, water washing was performed 3 times, and then, after drying the organic layer with magnesium sulfate, methylene chloride was distilled under reduced pressure, and recrystallization was performed using methylene chloride and methanol in a mixing ratio of 50:50.

After mixing 1 equivalent of the epoxy compound thus synthesized with 0.004 equivalent of t-butylammonium bromide, 0.001 equivalent of 2, 6-diisobutylphenol and 2.2 equivalent of acrylic acid, 24.89g of propylene glycol monomethyl ether acetate as a solvent was added and mixed. Air was blown into the reaction solution at 25ml/min, and the solution was heated to 95℃and dissolved. The reaction solution was heated to 120℃with cloudiness to dissolve completely. If the solution becomes transparent and has a high viscosity, the acid value is measured and stirred until the acid value becomes less than 1.0mgKOH/g. It took 11 hours until the acid value reached the target (0.8). After the reaction, the temperature of the reactor was lowered to room temperature to obtain a colorless transparent compound.

[ chemical formula 13]

(2) 600g of propylene glycol monomethyl ether acetate was added to 307.0g of the compound of chemical formula 13 and dissolved, 78g of biphenyltetracarboxylic dianhydride and 1g of tetraethylammonium bromide were mixed, and the mixture was slowly warmed and reacted at 110℃for 4 hours. After confirming the disappearance of the acid anhydride group, 38.0g of 1,2,3, 6-tetrahydrophthalic anhydride was mixed and reacted at 90℃for 6 hours to polymerize into a Cardo binder resin. The disappearance of the anhydride was confirmed by IR spectroscopy. The acid value was 120mgKOH/g.

Synthesis example 11: adhesive resin (E-3) containing Cardo adhesive resin

(1) After a reflux condenser and a thermometer were set in the three-necked flask, 42.5g of 9, 9-bisphenol fluorene was added thereto, and 220mL of 2- (chloromethyl) oxirane was quantitatively introduced. After 100mg of tetrabutylammonium bromide was added, stirring was started while the temperature was raised to 90 ℃. After confirming that the content of unreacted substances was less than 0.3%, distillation under reduced pressure was performed.

After the temperature was reduced to 30 ℃, methylene chloride was injected and NaOH was slowly added. After confirming that the product was 96% or more by High Performance Liquid Chromatography (HPLC), 5% hcl was added dropwise to terminate the reaction. After the reaction was extracted and the layers were separated, the organic layer was washed with water and washed to neutrality. MgSO for organic layer ₄ After drying, the mixture was distilled under reduced pressure using a rotary evaporator and concentrated. Methylene chloride was added to the concentrated product, the temperature was raised to 40℃and methanol was added while stirring, and then the solution temperature was lowered and stirred. The resulting solid was filtered and dried under vacuum at ordinary temperature to obtain 52.7g of a white solid powder (yield 94%). The structure was confirmed by 1H NMR.

[ reaction type 1]

1H NMR(CDCl3)：7.75(2H)，7.35-7.254(6H)，7.08(4H)，6.74(4H)，4.13(2H)，3.89(2H)，3.30(2H)，2.87(2H)，2.71(2H)。

(2) Synthesis of 3,3' - (((9H-fluorene-9, 9-diyl) bis (4, 1-phenylene)) bis (oxy)) bis (1-phenylthio) propan-2-ol)

After a three-necked flask was equipped with a reflux condenser and a thermometer, the reaction product (1000 g) in the stage (1), thiophenol (524 g) and ethanol (617 g) were added and stirred. 328g of triethylamine was slowly dropped into the reaction solution. After confirming the disappearance of the starting material by High Performance Liquid Chromatography (HPLC), the reaction was terminated. After the completion of the reaction, ethanol was distilled under reduced pressure to remove the ethanol. After the organic matter was dissolved in methylene chloride, it was washed with water, and then methylene chloride was removed by distillation under reduced pressure. After the concentrated organic matter was dissolved in ethyl acetate, an ether solvent was added dropwise, and stirring was performed for 30 minutes. The compound was distilled under reduced pressure to give 945g (yield 64%) of pale yellow oil, the structure of which was confirmed by 1H NMR.

[ reaction type 2]

1H NMR(CDCl3)：7.82(2H)，7.38-6.72(20H)，6.51(4H)，4.00(2H)，3.97(2H)，3.89(2H)，3.20(2H)，3.01(2H)，2.64(2H)。

(3) Synthesis of binder resin

After a three-necked flask was equipped with a reflux condenser and a thermometer, 200g of 3,3' - (((9H-fluorene-9, 9-diyl) bis (4, 1-phenylene)) bis (oxy)) bis (1-phenylthio) propan-2-ol) monomer synthesized in the stage (2) dissolved in 50% PGMEA solvent was added, and the temperature was raised to 115 ℃. 31.1g of 3,3', 4' -biphenyltetracarboxylic dianhydride was added dropwise thereto at 115℃and the mixture was stirred while maintaining the temperature at 115℃for 6 hours. 7.35g of phthalic anhydride was added thereto, and the reaction was further stirred for 2 hours. After cooling, a binder resin having a weight average molecular weight of 3,500g/mol was obtained. The acid value was 150mgKOH/g.

Synthesis example 12: adhesive resin (E-4) comprising epoxy group-containing acrylic adhesive resin

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 2g of 2,2' -azobisisobutyronitrile, 18g of acrylic acid, 37.9g of p-vinyltoluene, 10g of methyl methacrylate, 34.1g of glycidyl methacrylate and 3g of n-dodecylmercaptan were charged, and nitrogen substitution was performed.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 140mgKOH/g, and the weight average molecular weight Mw measured by GPC was about 13,110.

Synthesis example 13: adhesive resin (E-5) comprising epoxy group-containing acrylic adhesive resin

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 2g of 2,2' -azobisisobutyronitrile, 15g of acrylic acid, 15.0g of p-vinyltoluene, 20g of methyl methacrylate, 50.0g of glycidyl methacrylate and 3g of n-dodecylmercaptan were charged, and nitrogen substitution was performed.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 115mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 13,110.

Synthesis example 14: adhesive resin (E-6) comprising epoxy group-containing acrylic adhesive resin

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 2g of 2,2' -azobisisobutyronitrile, 16g of acrylic acid, 14.0g of p-vinyltoluene, 20g of methyl methacrylate, 50.0g of 7-oxabicyclo [4.1.0] heptan-3-ylmethacrylate and 3g of n-dodecanethiol were charged and replaced with nitrogen.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 125mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 11,110.

Synthesis example 15: adhesive resin (E-7) comprising epoxy group-containing acrylic adhesive resin

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 3.5g of 2,2' -azobisisobutyronitrile, 16g of acrylic acid, 14.0g of p-vinyltoluene, 20g of methyl methacrylate, 20.0g of glycidyl methacrylate, 20.0g of 7-oxabicyclo [4.1.0] heptan-3-ylmethacrylate and 3g of n-dodecanethiol were charged and replaced with nitrogen.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 98mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 8,090.

Synthesis example 16: synthesis of binder resin (E-8) comprising epoxy group-containing acrylic binder resin

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 1.2g of 2,2' -azobisisobutyronitrile, 16g of acrylic acid, 14.0g of p-vinyltoluene, 20g of methyl methacrylate, 50.0g of 3-vinyl-7-oxa-bicyclo [4.1.0] heptane and 1.5g of n-dodecanethiol were charged, followed by nitrogen substitution.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 98mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 18,090.

Synthesis example 17: adhesive resin (E-9)

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 2g of 2,2' -azobisisobutyronitrile, 5g of acrylic acid, 35.0g of benzyl methacrylate, 60g of methyl methacrylate and 3g of n-dodecylmercaptan were charged, and the flask was replaced with nitrogen.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 40mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 12,370.

Synthesis example 18: adhesive resin (E-10)

Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, 120g of propylene glycol monomethyl ether acetate, 80g of propylene glycol monomethyl ether, 2g of 2,2' -azobisisobutyronitrile, 20g of acrylic acid, 30.0g of benzyl methacrylate, 50g of methyl methacrylate and 3g of n-dodecyl mercaptan were charged, and nitrogen substitution was performed.

Thereafter, the temperature of the reaction solution was raised to 80℃with stirring, and the reaction was carried out for 8 hours. The acid value of the solid content of the binder resin thus synthesized was 160mgKOH/g, and the weight average molecular weight Mw as measured by GPC was about 11,874.

Production of light-converting resin composition: examples 1 to 24 and comparative examples 1 to 7

Light-converting resin compositions of examples and comparative examples were produced using the components and contents (wt%) shown in tables 1 to 3 below.

TABLE 1

TABLE 2

TABLE 3

Experimental example

Light conversion coatings were produced as follows using the light conversion resin compositions produced in the above examples and comparative examples, and the brightness, light maintenance rate, color reproducibility, heat resistance, and film hardness at this time were measured by the methods described below, and the evaluation results thereof are shown in table 4 below.

(1) Manufacture of light conversion coatings

The light-converting resin compositions produced in examples and comparative examples were used to produce coating films. Specifically, each of the above-mentioned light-converting resin compositions was coated on a 5cm×5cm glass substrate by spin coating, placed on a heating plate, and heated in a heating oven at 180 ℃ for 30 minutes after maintaining a temperature of 100 ℃ for 10 minutes to form a thin film, thereby producing a light-converting coating. Regarding the thickness of the light-converting resin film manufactured as described above, a thickness of 10 μ0 was made according to the content of quantum dots.

(2) Evaluation of brightness

The coating film produced in (1) above was placed on top of a blue light source (XLamp XR-E LED, royal blue 450, korey corporation) and the brightness was measured using a brightness measuring instrument (CAS 140CT Spectrometer, instrument systems corporation), and the evaluation results thereof are shown in table 4 below.

(3) Light maintenance rate

The coated substrate produced by the above-mentioned method for producing a light conversion coating was subjected to Hard baking (Hard baking) at 230℃for 60 minutes, and the luminous efficiency before Hard baking and the luminous efficiency after Hard baking were measured, and the level of the maintained luminous efficiency was confirmed, and the evaluation results thereof are shown in Table 4 below.

(4) Evaluation of Heat resistance

After the coating film was formed by the above (1), the change in thickness after thermal shock was confirmed by the following equation 1. Specifically, heat at 230 ℃ was applied to the finally completed coating film for 1 hour, and the thickness before/after heating was measured, and the change rate was calculated by the following equation 1. In this case, the change rate of the thickness was equal to or greater than 90%, and if it was less than 90%, it was poor (x), and the evaluation results are shown in table 4 below.

[ mathematics 1]

Shrinkage rate of coating film = { (film thickness after heat treatment)/(film thickness before heat treatment) } ×100 (%)

(5) Hardness of coating film

The degree of cure of the coating film produced in the above (1) was measured at a high temperature of 150℃using a durometer (HM 500; product of Ficoll corporation), and the surface hardness was evaluated based on the following criteria. The results are shown in table 2 below.

< evaluation criterion >

O: surface hardness of 50 or more

Delta: surface hardness of 30 or more and less than 50

X: surface hardness of less than 30

(6) Color reproducibility

The coating film produced in (1) above was placed on top of a blue light source (XLamp XR-E LED, royal blue 450, korey corporation), a color filter substrate (using UN65, a TV filter of samsung electronics corporation) having red, green, and blue patterns formed thereon was placed thereon, and then the color coordinates of the red, green, and blue colors were measured using a colorimeter (OSP-200, olympus corporation), and the area ratio of the color reproduction area displayed at this time to the NTSC color area was calculated, and the evaluation results thereof were shown in table 4 below.

TABLE 4

Referring to table 4, in the case of examples of the present invention including Cardo-based binder resin and epoxy-containing acrylic-based binder resin, very excellent properties were observed with respect to comparative examples, and from the results, it was found that cracking failure of the vapor deposition film occurring in the heat treatment step introduced in the production of the display can be greatly reduced.

Further, the difference in emission center wavelength of the quantum dots of the embodiments of the present invention was 50nm or more, and when two or more types of quantum dots characterized by a green emission wavelength of 510nm to 540nm and a red emission center wavelength of 610nm to 630nm were applied, it was confirmed that color reproducibility was very excellent, but when one type of quantum dot was used, and when quantum dots having a difference in emission center wavelength of less than 50nm were applied, it was confirmed that it was difficult to use a light source for a color filter due to insufficient color reproducibility performance. Furthermore, it was confirmed that the brightness and light maintenance ratio of examples were significantly superior to those of comparative examples as the strength of the coating film was increased.

Claims

1. A light-converting resin composition comprising two or more kinds of quantum dots having luminescence center wavelengths different from each other by 50nm or more, and a binder resin,

the binder resin comprises a Cardo-based binder resin and an epoxy group-containing acrylic binder resin,

the quantum dot comprises polyethylene glycol ligands arranged on the surface,

the epoxy group-containing acrylic adhesive resin comprises at least one repeating unit of the following chemical formulas 2 to 4,

The Cardo binder resin comprises at least one repeating unit of the following chemical formulas 5 to 10,

the polyethylene glycol ligand comprises a compound represented by the following chemical formula 1-A,

chemical formula 1-A

In the chemical formula 1-a described above,

r' is represented by the formula 1-1,

chemical formula 1-1

Rl-O-R2

In the chemical formula 1-1 described above,

r1 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

r2 is represented by the chemical formula 1-2,

chemical formula 1-2

In the chemical formula 1-2 described above,

a is an oxygen atom or a sulfur atom,

r3 is a direct bond or an alkylene group having 1 to 10 carbon atoms,

b is mercapto (-SH) or carboxylic acid

R' is a hydrogen atom, a mercapto group (O-SH) or a carboxylic acid group

k is an integer of 1 to 100,

l is an integer of 0 to 1,

m is an integer of 0 to 10,

chemical formula 2

Chemical formula 3

Chemical formula 4

In the chemical formulas 2 to 4 described above,

r4, R5 and R6 are each independently hydrogen or methyl, formula 5

Chemical formula 6

Chemical formula 7

Chemical formula 8

In the chemical formulas 5 to 8 described above,

Y is an anhydride residue which is a group,

z is an acid dianhydride residue, and Z is an acid dianhydride residue,

R13, R13', R14 and R14' are each independently a linear alkylene group having 1 to 6 carbon atoms or a branched alkylene group having 3 to 6 carbon atoms, which may be interrupted by at least one of an ester bond, a cycloalkylene group having 6 to 14 carbon atoms and an arylene group having 6 to 14 carbon atoms,

wherein r and s are not both 0,

chemical formula 9

Chemical formula 10

In the chemical formulas 9 and 10 described above,

p is each independently

R19 and R20 are each independently hydrogen, hydroxyl, thiol, amino, nitro or halogen atom, ar1 is each independently C6-C15 aryl,

y' is an anhydride residue which is a group,

z' is an acid dianhydride residue,

a' is O, S, N, si or Se,

a and b are each independently integers of 1 to 6,

c and d are each independently integers from 0 to 30,

wherein c and d are not both 0.

2. The light-converting resin composition according to claim 1, wherein the compound represented by the following chemical formula 1-3,

Chemical formulas 1-3

In the chemical formulas 1 to 3 described above,

r' is mercapto (-SH) or carboxylic acid

o is an integer of 0 to 5,

p is an integer of 0 to 1,

q is an integer of 1 to 50.

3. The light-converting resin composition according to claim 1, wherein the quantum dot is a non-cadmium quantum dot.

4. The light-converting resin composition according to claim 1, wherein the quantum dot comprises a core and a shell,

the core comprises one or more substances selected from the group consisting of a two-element compound, a three-element compound, and a four-element compound, the two-element compound being selected from the group consisting of GaN, gaP, gaAs, gaSb, alN, alP, alAs, alSb, inN, inP, inAs, inSb and mixtures thereof; the ternary element compound is selected from the group consisting of GaNP, gaNAs, gaNSb, gaPAs, gaPSb, alNP, alNAs, alNSb, alPAs, alPSb, inNP, inNAs, inNSb, inPAs, inPSb and mixtures thereof; the four element compound is selected from the group consisting of GaAlNAs, gaAlNSb, gaAlPAs, gaAlPSb, gaInNP, gaInNAs, gaInNSb, gaInPAs, gaInPSb, inAlNP, inAlNAs, inAlNSb, inAlPAs, inAlPSb, gaAlNP and mixtures thereof,

The shell contains one or more substances selected from ZnSe, znS and ZnTe.

5. The light-converting resin composition according to claim 1, wherein the quantum dots comprise two or more kinds of quantum dots whose luminescence center wavelengths differ from each other by 70nm or more.

6. The light-converting resin composition according to claim 5, wherein the quantum dots comprise two or more kinds selected from the group consisting of green quantum dots having a luminescence center wavelength in a range of 510nm to 540nm and red quantum dots having a luminescence center wavelength in a range of 610nm to 630 nm.

7. The light-converting resin composition according to claim 1, wherein, the polyethylene glycol ligands comprise a ligand selected from the group consisting of 2- (2-methoxyethoxy) acetic acid, 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid, mono- [2- (2-methoxy-ethoxy) -ethyl ] succinate, mono- [2- (2-methoxy-ethoxy) -ethyl ] malonate, mono- {2- [2- (2-ethoxy) -ethoxy ] -ethyl } glutarate, {2- [2- (2-ethyl-hexyloxy) -ethoxy ] -ethoxy } -acetic acid mono- [2- (2- {2- [2- (2- {2- [2- (2-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] succinate, mono- [2- (2- {2- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] succinate, malonic acid mono- [2- (2- {2- [2- (2- {2- [2- (2-isobutoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] ester, adipic acid mono- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] ester, 2-oxo-adipic acid 6- (2- {2- [2- (2-ethoxy) -ethoxy ] -ethoxy } -ethyl) ester succinic acid mono- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2- {2- [2- (2-methoxy-ethoxy) -ethoxy ] -ethoxy } -ethoxy) -ethyl ] ester, (2-butoxy-ethoxy) -acetic acid, more than one of the group consisting of carboxy-EG 6-undecanethiol and (2-carboxymethoxy-ethoxy) -acetic acid.

8. The light-converting resin composition according to claim 1, further comprising one or more selected from the group consisting of scattering particles, a thermosetting compound, a curing accelerator, an additive, and a solvent.

9. A light-converting laminate substrate comprising a cured product of the light-converting resin composition according to any one of claims 1 to 8.

10. The light-converting laminate substrate of claim 9, wherein the material of the light-converting laminate substrate is glass.

11. An image display device comprising the light-converting laminated substrate according to claim 9.