Resin composition and article containing same

Abstract

The present specification provides a resin composition comprising a resin containing a unit represented by Chemical Formula 1; a resin containing a unit represented by Chemical Formula 2; and at least two types of UV stabilizers, wherein the color difference change rate value (Eab1) of the resin composition on the first day (n=1) after UV irradiation according to Mathematical Formula 1 is 10.0 or less.

Description

[Technical Field]

[0001] This application claims the benefit of the filing dates of Korean Patent Application No. 10-2023-0121554 filed with the Korean Intellectual Property Office on September 13, 2023, Korean Patent Application No. 10-2023-0127259 filed with the Korean Intellectual Property Office on September 22, 2023, Korean Patent Application No. 10-2023-0127192 filed with the Korean Intellectual Property Office on September 22, 2023, and Korean Patent Application No. 10-2024-0124634 filed with the Korean Intellectual Property Office on September 12, 2024, the contents of which are incorporated herein in their entireties.

[0002] The present specification relates to a resin composition and an article containing the same. [Background technology]

[0003] A highly refractive material is a material with excellent photon refraction power and a dense medium with a photon-transmitting surface. Glass has generally been used as a highly refractive material, but it has drawbacks such as low safety and a high specific gravity. Therefore, there is a need to develop a highly refractive material based on a transparent, soft polymer.

[0004] High refractive index resins, an example of the high refractive index material, can be used in optical components requiring anti-reflection, light-scattering, or light-extraction effects, such as optical plastic lenses; high-precision lenses for optical disc recording such as CDs and DVDs; prisms; optical fibers; light guide plates; optical adhesives or pressure-sensitive adhesives; encapsulants for optical semiconductors; or functional materials applied to plasma display panels (PDPs) or liquid crystal displays (LCDs), such as anti-reflection films, light-scattering films, viewing angle improving films, brightness improving films, or optical filters. High refractive index resins can also be used as additives for preventing deterioration of plastics, cosmetic additives, or automotive window glass.

[0005] Therefore, it is necessary to develop a material that can improve the refractive index, heat resistance, and chemical resistance and can satisfy the balance of physical properties such as mechanical properties and light resistance. Summary of the Invention [Problem to be solved by the invention]

[0006] The present specification aims to provide a resin composition and an article containing the same. [Means for solving the problem]

[0007] One embodiment of the present specification provides a resin composition comprising: a resin containing a unit represented by the following chemical formula 1; a resin containing a unit represented by the following chemical formula 2; and at least two types of ultraviolet stabilizers, wherein the resin composition has a color difference change rate value (Eab1) of 10.0 or less on the first day (n=1) after ultraviolet irradiation according to the following mathematical formula 1:

[0008] [Mathematical formula 1] Eab n ={(L n -L n-1 ) 2 +(a n -a n-1 ) 2 +(b n -b n-1 ) 2} 1 / 2

[0009] In the above mathematical formula 1, L n-1 is the brightness index of the resin composition on the (n-1)th day after ultraviolet irradiation, a n-1 and b n-1 is the color coordinate of the resin composition on the (n-1)th day of ultraviolet irradiation, L n is the brightness index of the resin composition on the nth day after ultraviolet irradiation, a n and b n are the color coordinates of the resin composition on the nth day after ultraviolet irradiation,

[0010] [ka]

[0011] In the above Chemical Formulas 1 and 2, L11 is any one of the following chemical formulae A-1, B-1, and C-1: Y1, Y2, Y3, and Y4 are the same or different and each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X1, X2, X7, and X8 are the same or different and each independently represent C=O or a substituted or unsubstituted alkylene group; X3, X4, X5, and X6 are the same or different and each independently represent O or S; Z1 and Z2 are the same or different and each independently represent a substituted or unsubstituted alkylene group, a substituted or unsubstituted heteroalkylene group, or a substituted or unsubstituted cycloalkylene group; p is an integer of 0 to 8, and when p is 2 or more, the structures in parentheses are the same or different from each other, La is a substituted or unsubstituted divalent or higher alkyl group, a substituted or unsubstituted divalent or higher cycloalkyl group, a substituted or unsubstituted divalent or higher heteroalkyl group, a substituted or unsubstituted divalent or higher aryl group, or a substituted or unsubstituted divalent or higher heteroaryl group; when p is 0, La is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; X9, X10, X11 and X12 are the same or different and each independently represent a divalent amide group, a divalent urethane group, a divalent urea group, a divalent ester group, O or S; Z3 and Z4 are the same or different and each independently represent a substituted or unsubstituted alkylene group, a substituted or unsubstituted heteroalkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group; n1, n2, n3, and n4 are each an integer of 0 to 20, and when n1, n2, n3, and n4 are each 2 or more, the structures in each parentheses are the same or different from each other, y1, y2, y3, and y4 each represent an integer of 1 to 20, and when y1, y2, y3, and y4 are 2 or more, the structures in each parentheses are the same or different from each other, A1 to A4 are the same or different and each independently represents CRR′; R and R' are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; * indicates a site linked to the main chain of the resin.

[0012] [ka]

[0013] In the above chemical formulas A-1, B-1, and C-1, L1 and L2 are the same or different and each independently represent a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group; R1 to R8 are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; a fused ring group of a substituted or unsubstituted aromatic hydrocarbon ring and an aliphatic hydrocarbon ring; or a substituted or unsubstituted heteroaryl group, or adjacent groups may be bonded to each other to form a hydrocarbon ring; r1 and r2 are each an integer of 0 to 6, and when r1 and r2 are each 2 or more, the structures in each bracket are the same or different from each other, r3, r4, r7, and r8 are each an integer of 0 to 4, and when r3, r4, r7, and r8 are each 2 or more, the structures in each bracket are the same or different from each other, ** indicates the site of binding to Chemical Formula 1.

[0014] Another embodiment of the present specification provides an article comprising the resin composition or a cured product thereof. [Effects of the Invention]

[0015] The resin composition according to one embodiment of the present specification has properties such as a low color difference change value, a high refractive index, excellent adhesive strength, high transmittance, and a high glass transition temperature.

[0016] Furthermore, the resin composition according to an embodiment of the present specification can be applied to coating materials, curable materials, lens materials, optical substrate materials, and the like. DETAILED DESCRIPTION OF THE INVENTION

[0017] This specification will be explained in more detail below.

[0018] In this specification, when a member is said to be located "on" another member, this includes not only when the member is in contact with the other member, but also when another member is present between the two members.

[0019] In this specification, when a part is said to "comprise" a certain component, this does not mean that it may further include other components, unless specifically stated to the contrary, but rather that it does not exclude other components.

[0020] As used herein, the term "substituted" means that a hydrogen atom bonded to a carbon atom of a compound is converted to another substituent, and the position of the substitution is not limited as long as it is a position at which a hydrogen atom is substituted, i.e., a position at which a substituent can be substituted, and when two or more substituents are substituted, the two or more substituents may be the same or different from each other.

[0021] As used herein, the term "substituted or unsubstituted" means substituted with one or more substituents selected from the group consisting of deuterium; a halogen group; a nitro group (NO); a nitrile group (CN); an alkyl group; a heteroalkyl group; a cycloalkyl group; an aryl group; an aryloxy group; an arylthio group; an alkylthio group; and a heteroaryl group, or substituted with a substituent in which two or more of the above-exemplified substituents are linked together, or has no substituents.

[0022] In this specification, * denotes a binding site to another structure.

[0023] In this specification, the cycloalkylene group may be a monocyclic or polycyclic cycloalkylene group. Specifically, the cycloalkylene group may be a cycloalkylene group having 3 to 20 carbon atoms; a monocyclic or polycyclic cycloalkylene group having 6 to 18 carbon atoms; or a monocyclic or polycyclic cycloalkylene group having 6 to 12 carbon atoms. More specifically, the cycloalkylene group may be a divalent group derived from an alicyclic hydrocarbon such as a cyclopentylene group, a cyclohexylene group, or a cycloheptylene group as a monocyclic cycloalkylene group, or may be an adamantane-diyl group, a norbornane-diyl group, or the like as a polycyclic cycloalkylene group. However, the cycloalkylene group is not limited thereto. Furthermore, the cycloalkylene group may be unsubstituted or substituted with one or more alkyl groups having 1 to 10 carbon atoms, alkoxy groups having 1 to 10 carbon atoms, or halogen groups.

[0024] In this specification, the cycloalkyl group is not a divalent group, and the description of the cycloalkylene group can be applied, except that it is a monovalent group.

[0025] In this specification, the description of a cycloalkylene group can be applied to a divalent cycloalkyl group.

[0026] In this specification, the alkylene group may be a straight-chain or branched-chain alkylene group as a divalent group derived from an aliphatic hydrocarbon having 1 to 30 carbon atoms, 1 to 20 carbon atoms, 1 to 10 carbon atoms, or 1 to 5 carbon atoms. Specific examples of the alkylene group include a methylene group, an ethylene group, a propylene group, an n-propylene group, an isopropylene group, a butylene group, an n-butylene group, an isobutylene group, a tert-butylene group, a sec-butylene group, a 1-methylbutylene group, a 1-ethylbutylene group, a pentylene group, an n-pentylene group, an isopentylene group, a neopentylene group, a tert-pentylene group, a hexylene group, an n-hexylene group, a 1-methylpentylene group, a 2-methylpentylene group, a 4-methyl-2-pentylene group, a 3,3-dipentylene group, a 4-methyl-2- ... Examples include, but are not limited to, methylbutylene, 2-ethylbutylene, heptylene, n-heptylene, 1-methylhexylene, octylene, n-octylene, tert-octylene, 1-methylheptylene, 2-ethylhexylene, 2-propylpentylene, n-nonylene, 2,2-dimethylheptylene, 1-ethyl-propylene, 1,1-dimethyl-propylene, isohexylene, 2-methylpentylene, 4-methylhexylene, and 5-methylhexylene.

[0027] In this specification, the alkyl group is not a divalent group, and the description of the alkylene group can be applied, except that it is a monovalent group.

[0028] In this specification, the description of an alkylene group can be applied to a divalent alkyl group.

[0029] As used herein, a heteroalkylene group refers to a stable linear or branched chain or cyclic hydrocarbon radical, or combinations thereof, consisting of the carbon atoms of the alkylene group described above and one or more heteroatoms selected from the group consisting of O, N, Si, and S, wherein the nitrogen and sulfur atoms may be optionally oxidized, and the nitrogen heteroatom may be optionally quaternized. The heteroatoms O, N, S, and Si may be placed at any interior position of the heteroalkyl group or at the position at which the alkyl group is attached to the remainder of the molecule. Examples include, but are not limited to, -CH-CH-O-CH, -CH-CH-NH-CH, -CH-CH-N(CH)-CH, -CH-S-CH-CH, -CH-CH-S(O)-CH, -CH-CH-S(O)-CH, -CH=CH-O-CH, -Si(CH), -CH-CH=N-OCH, and -CH=CH-N(CH)-CH. Up to two heteroatoms may be consecutive, for example, -CH2-NH-OCH3 and -CH2-OSi(CH3)3.

[0030] In this specification, the description of a heteroalkylene group can be applied, except that the heteroalkyl group is not a divalent group but a monovalent group.

[0031] In this specification, the description of a heteroalkylene group can be applied to a divalent heteroalkyl group.

[0032] In this specification, a straight-chain or branched-chain alkyl group is not a divalent group, and the description of a straight-chain or branched-chain alkylene group can be applied to it, except for monovalent groups.

[0033] In this specification, unless otherwise limited, alkyl groups include straight chain alkyl groups and branched chain alkyl groups.

[0034] In this specification, the arylene group may be a monocyclic or polycyclic arylene group, and the number of carbon atoms is not particularly limited, but preferably 6 to 30, and may be 6 to 20. Specifically, the monocyclic arylene group may be a phenylene group, a biphenylylene group, a terphenylylene group, or the like, but is not limited thereto. When the arylene group is a polycyclic arylene group, the number of carbon atoms is not particularly limited, but preferably 10 to 30, and may be 10 to 20. Specifically, the polycyclic arylene group may be a naphthylene group, an anthracenylene group, a phenanthrenylene group, a triphenylenylene group, a pyrenylene group, a phenalenylene group, a perylenylene group, a chrysenylene group, a fluorenylene group, or the like, but is not limited thereto.

[0035] In this specification, the aryl group is not a divalent group, and the description of the arylene group can be applied to it, except that the aryl group is a monovalent group.

[0036] In this specification, a heteroaryl group refers to a group containing one or more non-carbon atoms, i.e., heteroatoms. Specifically, the heteroatoms include one or more atoms selected from the group consisting of O, N, Se, and S. The number of carbon atoms in the heteroaryl group is not particularly limited, but is preferably 1 to 30, and may be 1 to 20. The heteroaryl group may be monocyclic or polycyclic. Examples of heteroaryl groups include, but are not limited to, thiophene, furan, dibenzofuran, dibenzothiophene, benzothiophene, pyrrole, imidazole, thiazole, oxazole, oxadiazole, pyridine, bipyridine, pyrimidine, triazine, acridine, pyridazine, pyrazine, quinoline, quinazoline, quinoxaline, phthalazine, pyridopyrimidine, pyridopyrazine, pyrazinopyrazine, isoquinoline, indole, and carbazole.

[0037] In this specification, the heteroarylene group is not a monovalent group, but the description of heteroaryl can be applied to it, except that it is a divalent group.

[0038] In this specification, a divalent heteroaryl group is not a monovalent group, and the description of heteroaryl can be applied to it, except for the divalent group.

[0039] In this specification, the divalent aliphatic hydrocarbon group means the aforementioned alkylene, cycloalkylene, etc.

[0040] In this specification, the alkoxy group may be an alkoxy group having 1 to 10 carbon atoms or 1 to 5 carbon atoms. Specific examples of the alkoxy group include, but are not limited to, a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a tert-butoxy group, a sec-butoxy group, a 1-methyl-butoxy group, a 1-ethyl-butoxy group, or a pentoxy group.

[0041] As used herein, a halogen group is a fluoro, chloro, bromo, or iodo group.

[0042] In this specification, the fused ring group of an aromatic hydrocarbon ring and an aliphatic hydrocarbon ring may be a fused ring of the above-mentioned aryl group and cycloalkyl group, or a fused ring of an aryl group and a cycloalkene group. The cycloalkene group means an unsaturated hydrocarbon group in the cycloalkyl group, i.e., a cycloalkyl group containing a double bond.

[0043] In this specification, the above description of cycloalkylene or heterocycloalkylene can be applied to an aliphatic ring, and the above description of arylene or heteroarylene can be applied to an aromatic ring.

[0044] In this specification, an aryloxy group may be represented by -ORo, where the above description of aryl applies to Ro.

[0045] In this specification, an arylthio group may be represented by -SRs1, and the above description of aryl applies to Rs1.

[0046] In this specification, an alkylthio group may be represented by -SRs2, and the above description of alkyl applies to Rs2.

[0047] In this specification, the oxygen of the ester group may be substituted with a linear alkyl group having 1 to 30 carbon atoms, a branched alkyl group having 3 to 30 carbon atoms, or a cyclic alkyl group having 3 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms. Specifically, the ester group may have any one of the following structural formulas, but is not limited to these.

[0048] [ka]

[0049] In the above structure, R101 and R102 are the same or different and each independently represent a linear or branched alkyl group having 1 to 10 carbon atoms, substituted or unsubstituted with a monocyclic or polycyclic aryl group having 6 to 30 carbon atoms; or a monocyclic or polycyclic aryl group having 6 to 30 carbon atoms.

[0050] In this specification, the divalent ester group means that R101 or R102 is a divalent group and the ester group has two linking sites.

[0051] As used herein, hydrogen is hydrogen, deuterium or tritium.

[0052] According to one embodiment of the present specification, the moiety of Formula 1 to which no substituent is bonded has hydrogen bonded thereto.

[0053] A resin composition according to one embodiment of the present specification includes a resin containing a unit represented by Chemical Formula 1; a resin containing a unit represented by Chemical Formula 2; and at least two types of UV stabilizers, and the color difference change rate value (Eab1) of the resin composition after UV irradiation on the first day (n=1) according to the following mathematical formula 1 is 10.0 or less.

[0054] The resin composition according to one embodiment of the present specification has a color difference change rate value (Eab1) of 10.0 or less on the first day (n=1) of UV irradiation according to the above mathematical formula 1. The resin composition suppresses deformation of the internal molecular structure of the resin containing the unit represented by the above chemical formula 1 and the resin containing the unit represented by the above chemical formula 2, which are contained in the resin composition, due to UV irradiation over a long period of time, thereby minimizing discoloration and deterioration of the resin composition and realizing excellent light resistance and stable optical properties.

[0055] As a result, the resin composition can be used to produce a resin film that is colorless and transparent and maintains high strength even when exposed to an environment where strong ultraviolet rays are irradiated for a long period of time, and the low cost and simple process can expand the range of applications of the resin film, making it economical and efficient.

[0056] More specifically, the resin composition may have a color difference change rate value (Eab1) on the first day (n=1) after ultraviolet irradiation according to the mathematical formula 1 above of 10.0 or less, or may be 0.01 to 10.0, or 0.01 to 9.0, or 0.01 to 8.0, or 0.01 to 7.0, or 0.05 to 5.0, or 5.68 to 9.14.

[0057] In addition, the color difference change rate (Eab1) of the resin composition on the first day (n=1) after ultraviolet irradiation according to the mathematical formula 1 can be calculated using the following mathematical formula 1-1.

[0058] [Mathematical formula 1-1] Eab1={(L1-L0) 2 +(a1-a0) 2 +(b1-b0) 2}1 / 2

[0059] In the above mathematical formula 1-1, L0 is the brightness index of the resin composition on the 0th day after ultraviolet irradiation, a0 and b0 are color coordinates of the resin composition on the 0th day after ultraviolet irradiation, L1 is the brightness index of the resin composition on the first day after ultraviolet irradiation, a1 and b1 are the color coordinates of the resin composition on the first day after ultraviolet irradiation.

[0060] The resin composition on the 0th day of ultraviolet irradiation means a resin composition that has not been irradiated with ultraviolet rays, and the resin composition on the 1st day of ultraviolet irradiation means a resin composition after irradiating with ultraviolet rays for one day.

[0061] When the color difference change rate value (Eab1) of the resin composition after one day (n=1) of UV irradiation according to Equation 1 is reduced to 10.0 or less, the resin composition does not discolor or deteriorate significantly even when exposed to UV light, making it suitable for use in products. However, when the color difference change rate value (Eab1) of the resin composition after one day (n=1) of UV irradiation according to Equation 1 exceeds 10.0, the resin composition may experience such severe discoloration or deterioration that it is difficult to use in products when exposed to UV light, which is undesirable.

[0062] The lightness index (L) and color coordinates (a, b) each represent a value on a coordinate axis that indicates a specific hue. L has a value from 0 to 100, with L approaching 0 indicating black and L approaching 100 indicating white. a has positive (+) and negative (-) values ​​based on 0, with a positive (+) representing red and a negative (-) representing green. b has positive (+) and negative (-) values ​​based on 0, with a positive (+) representing yellow and a negative (-) representing blue.

[0063] The lightness index (L) and color coordinates (a, b) of the resin composition may be measured by a method known in the art. For example, a 5 cm x 5 cm specimen may be prepared from the resin composition, and the specimen may be irradiated with ultraviolet light having a wavelength of 200 nm to 1,200 nm using a Shimadzu UV-2600 UV-vis Spectrometer at a temperature of 20°C to 70°C.

[0064] More specifically, the lightness index L1 of the resin composition on the first day after ultraviolet irradiation may be 97.00 or less, 94.00 to 97.00, 94.50 to 96.90, 95.00 to 96.90, or 95.59 to 96.65. The color coordinate a1 of the resin composition on the first day after ultraviolet irradiation may be -3.0 or more, -2.8 to -0.1, -2.8 to -0.2, -2.5 to -0.3, or -1.96 to -1.33. The color coordinate b1 of the resin composition on the first day after ultraviolet irradiation may be 10 or less, 1 to 10, 1 to 8, or 4.57 to 8.24.

[0065] According to one embodiment of the present specification, the chemical formula 1 is any one of the following chemical formulas 1-1 to 1-3.

[0066] [ka]

[0067] In the above chemical formulas 1-1 to 1-3, Z1, Z2, X1 to X6, n1, n2, Y1, Y2, y1, y2, A1, A2, and * are defined as in Chemical Formula 1 above. R1, r1, R2, and r2 are defined as in Chemical Formula A-1 above; L1, L2, R3, r3, R4, and r4 are defined as in Chemical Formula B-1. R5 to R8, r7 and r8 are as defined in the above chemical formula C-1.

[0068] According to one embodiment of the present specification, Z1 and Z2 are the same or different and each independently represent a linear or branched alkylene group having 1 to 30 carbon atoms.

[0069] According to one embodiment of the present specification, Z1 and Z2 are the same or different and each independently represent a linear or branched alkylene group having 1 to 20 carbon atoms.

[0070] According to one embodiment of the present specification, Z1 and Z2 are the same or different and each independently represent a linear or branched alkylene group having 1 to 10 carbon atoms.

[0071] According to one embodiment of the present specification, Z1 and Z2 are ethylene groups.

[0072] According to one embodiment of the present specification, X1 is C=O.

[0073] According to one embodiment of the present specification, X2 is C=O.

[0074] According to one embodiment of the present specification, X1 is a linear or branched alkylene group having 1 to 30 carbon atoms.

[0075] According to one embodiment of the present specification, X1 is a linear or branched alkylene group having 1 to 10 carbon atoms.

[0076] According to one embodiment of the present specification, X1 is a linear or branched alkylene group having 1 to 4 carbon atoms.

[0077] According to one embodiment of the present specification, X1 is a methylene group; or an ethylene group.

[0078] According to one embodiment of the present specification, X2 is a linear or branched alkylene group having 1 to 30 carbon atoms.

[0079] According to one embodiment of the present specification, X2 is a linear or branched alkylene group having 1 to 10 carbon atoms.

[0080] According to one embodiment of the present specification, X2 is a linear or branched alkylene group having 1 to 4 carbon atoms.

[0081] According to one embodiment of the present specification, X2 is a methylene group; or an ethylene group.

[0082] According to one embodiment of the present specification, X3 is O.

[0083] According to one embodiment of the present specification, X4 is O.

[0084] According to one embodiment of the present specification, X5 is O.

[0085] According to one embodiment of the present specification, X6 is O.

[0086] According to one embodiment of the present specification, X3 is S.

[0087] According to one embodiment of the present specification, X4 is S.

[0088] According to one embodiment of the present specification, X5 is S.

[0089] According to one embodiment of the present specification, X6 is S.

[0090] According to one embodiment of the present specification, Y1 and Y2 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 30 carbon atoms.

[0091] According to one embodiment of the present specification, Y1 and Y2 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms.

[0092] According to one embodiment of the present specification, Y1 and Y2 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms.

[0093] According to one embodiment of the present specification, Y1 and Y2 are the same or different and each independently represent hydrogen or a linear alkyl group having 1 to 4 carbon atoms.

[0094] According to one embodiment of the present specification, Y1 and Y2 are the same or different and each independently represent a hydrogen atom or a methyl group.

[0095] According to one embodiment of the present specification, A1 and A2 are the same or different and each independently represent CRR'.

[0096] According to one embodiment of the present specification, R and R' are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 30 carbon atoms.

[0097] According to one embodiment of the present specification, R and R' are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms.

[0098] According to one embodiment of the present specification, R and R' are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms.

[0099] According to one embodiment of the present specification, R and R' are the same or different and each independently represent hydrogen or a linear alkyl group having 1 to 4 carbon atoms.

[0100] According to one embodiment of the present specification, R and R' are the same or different and each independently represent a hydrogen atom or a methyl group.

[0101] According to one embodiment of the present specification, R1 and R2 are hydrogen.

[0102] In one embodiment of the present specification, L1 and L2 are the same or different and each independently represent a substituted or unsubstituted monocyclic or polycyclic arylene group having 6 to 30 carbon atoms.

[0103] In one embodiment of the present specification, L1 and L2 are the same or different and each independently represent a substituted or unsubstituted monocyclic or polycyclic arylene group having 6 to 20 carbon atoms.

[0104] In one embodiment of the present specification, L1 and L2 are the same or different and each independently represent a monocyclic or polycyclic arylene group having 6 to 30 carbon atoms substituted or unsubstituted with a monocyclic or polycyclic aryl group having 6 to 30 carbon atoms.

[0105] In one embodiment of the present specification, L1 and L2 are the same or different and each independently represent a monocyclic or polycyclic arylene group having 6 to 20 carbon atoms substituted or unsubstituted with a monocyclic or polycyclic aryl group having 6 to 20 carbon atoms.

[0106] In one embodiment of the present specification, L1 and L2 are the same or different and each independently represent a phenylene group unsubstituted or substituted with a phenyl group; or a naphthylene group.

[0107] In one embodiment of the present specification, L1 and L2 are the same and each represent a phenylene group unsubstituted or substituted with a phenyl group; or a naphthylene group.

[0108] In one embodiment of the present specification, L1 and L2 are phenylene groups.

[0109] In one embodiment of the present specification, L1 and L2 are phenylene groups substituted with phenyl groups.

[0110] In one embodiment of the present specification, L1 and L2 are naphthylene groups.

[0111] In one embodiment of the present specification, R3 and R4 are hydrogen.

[0112] In one embodiment of the present specification, R7 and R8 are the same or different and can be independently selected from hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heteroalkyl group; and the following functional groups:

[0113] [ka]

[0114] In the functional group, * denotes the site of connection to the chemical formula C-1.

[0115] According to one embodiment of the present specification, R7 and R8 are the same or different and each independently represent a hydrogen atom; a linear or branched alkyl group having 1 to 30 carbon atoms; a monocyclic or polycyclic aryl group having 6 to 30 carbon atoms which is substituted or unsubstituted with a cyano group, a linear or branched alkyl group having 1 to 30 carbon atoms, a linear or branched alkenyl group having 2 to 30 carbon atoms, or a monocyclic or polycyclic heterocyclic group having 2 to 30 carbon atoms; a fused ring group of a monocyclic or polycyclic aromatic hydrocarbon ring having 6 to 30 carbon atoms and a monocyclic or polycyclic aliphatic hydrocarbon ring having 3 to 30 carbon atoms; or a polycyclic heteroaryl group having 6 to 30 carbon atoms.

[0116] According to one embodiment of the present specification, R7 and R8 are the same or different and each independently represent a hydrogen atom; a linear or branched alkyl group having 1 to 30 carbon atoms; a monocyclic or polycyclic aryl group having 6 to 20 carbon atoms which is substituted or unsubstituted with a cyano group, a linear or branched alkyl group having 1 to 20 carbon atoms, a linear or branched alkenyl group having 2 to 20 carbon atoms, or a monocyclic or polycyclic heterocyclic group having 2 to 20 carbon atoms; a fused ring group of a monocyclic or polycyclic aromatic hydrocarbon ring having 6 to 20 carbon atoms and a monocyclic or polycyclic aliphatic hydrocarbon ring having 3 to 20 carbon atoms; or a polycyclic heteroaryl group having 6 to 20 carbon atoms.

[0117] According to one embodiment of the present specification, R7 to R8 are the same or different and each independently represent a hydrogen atom; a methyl group; a cyano group, or a phenyl group unsubstituted or substituted with a methyl group; a naphthyl group unsubstituted or substituted with a cyano group; a dihydroindene group; or a quinoline group.

[0118] According to one embodiment of the present specification, R5 and R6 are the same or different and each independently represent a linear or branched alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted with a halogen group; a monocyclic or polycyclic cycloalkyl group having 6 to 30 carbon atoms; a monocyclic or polycyclic aryl group having 6 to 30 carbon atoms; or a monocyclic or polycyclic heteroaryl group having 2 to 30 carbon atoms, or are bonded to each other to form a monocyclic or polycyclic aliphatic hydrocarbon ring having 6 to 30 carbon atoms, substituted or unsubstituted with a linear or branched alkyl group having 1 to 30 carbon atoms.

[0119] According to one embodiment of the present specification, R5 and R6 are the same or different and each independently represent a linear or branched alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted with a halogen group; a monocyclic or polycyclic cycloalkyl group having 6 to 20 carbon atoms; a monocyclic or polycyclic aryl group having 6 to 20 carbon atoms; or a monocyclic or polycyclic heteroaryl group having 2 to 20 carbon atoms, or are bonded to each other to form a monocyclic or polycyclic aliphatic hydrocarbon ring having 6 to 20 carbon atoms, substituted or unsubstituted with a linear or branched alkyl group having 1 to 20 carbon atoms.

[0120] According to one embodiment of the present specification, R5 and R6 are the same or different and each independently represent a methyl group substituted or unsubstituted with a fluoro group; an n-propyl group; an iso-butyl group; or a phenyl group, or are bonded to each other to form a cyclohexane or cyclododecane substituted or unsubstituted with a methyl group.

[0121] According to one embodiment of the present specification, the unit represented by Chemical Formula 1 includes a unit derived from any one or more of the following compounds:

[0122] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka]

[0123] In the structural formula, a and b are each an integer of 0 to 20.

[0124] According to one embodiment of the present specification, Z3 and Z4 are the same or different and each independently represent a linear or branched alkylene group having 1 to 30 carbon atoms.

[0125] According to one embodiment of the present specification, Z3 and Z4 are the same or different and each independently represent a linear or branched alkylene group having 1 to 20 carbon atoms.

[0126] According to one embodiment of the present specification, Z3 and Z4 are the same or different and each independently represent a linear or branched alkylene group having 1 to 10 carbon atoms.

[0127] According to one embodiment of the present specification, Z3 and Z4 are ethylene groups.

[0128] According to one embodiment of the present specification, X7 is C=O.

[0129] According to one embodiment of the present specification, X8 is C=O.

[0130] According to one embodiment of the present specification, X7 is a linear or branched alkylene group having 1 to 30 carbon atoms.

[0131] According to one embodiment of the present specification, X7 is a linear or branched alkylene group having 1 to 10 carbon atoms.

[0132] According to one embodiment of the present specification, X7 is a linear or branched alkylene group having 1 to 4 carbon atoms.

[0133] According to one embodiment of the present specification, X7 is a methylene group; or an ethylene group.

[0134] According to one embodiment of the present specification, X8 is a linear or branched alkylene group having 1 to 30 carbon atoms.

[0135] According to one embodiment of the present specification, X8 is a linear or branched alkylene group having 1 to 10 carbon atoms.

[0136] According to one embodiment of the present specification, X8 is a linear or branched alkylene group having 1 to 4 carbon atoms.

[0137] According to one embodiment of the present specification, X8 is a methylene group; or an ethylene group.

[0138] According to one embodiment of the present specification, X9 is O.

[0139] According to one embodiment of the present specification, X10 is O.

[0140] According to one embodiment of the present specification, X11 is O.

[0141] According to one embodiment of the present specification, X12 is O.

[0142] According to one embodiment of the present specification, X9 is S.

[0143] According to one embodiment of the present specification, X10 is S.

[0144] According to one embodiment of the present specification, X11 is S.

[0145] According to one embodiment of the present specification, X12 is S.

[0146] According to one embodiment of the present specification, Y3 and Y4 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 30 carbon atoms.

[0147] According to one embodiment of the present specification, Y3 and Y4 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms.

[0148] According to one embodiment of the present specification, Y3 and Y4 are the same or different and each independently represent hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms.

[0149] According to one embodiment of the present specification, Y3 and Y4 are the same or different and each independently represent hydrogen or a linear alkyl group having 1 to 4 carbon atoms.

[0150] According to one embodiment of the present specification, Y3 and Y4 are the same or different and each independently represent a hydrogen atom or a methyl group.

[0151] According to one embodiment of the present specification, A3 and A4 are the same or different and each independently represent CRR', wherein R and R' are defined as above.

[0152] In one embodiment of the present specification, when p is 0, the terminal is La, and when p is 2 or more, it is bound to La in the form of a dimer, trimer, tetramer, or the like.

[0153] According to one embodiment of the present specification, the unit represented by Chemical Formula 2 includes a unit derived from any one or more of the following compounds:

[0154] [ka] [ka]

[0155] In the structural formula, m, n, and k are each an integer of 0 to 20. In one embodiment of the present specification, the resin composition may further contain a resin containing a unit represented by the following chemical formula 3.

[0156] [ka]

[0157] In the above Chemical Formula 3, Y5 and Y6 are the same or different and each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X13 and X14 are the same or different and each independently represent C=O or a substituted or unsubstituted alkylene group; X15, X16, X17, and X19 are the same or different and each independently represent O or S; X18 is C=O,

[0158] [ka]

[0159] and r is an integer of 0 to 6, and when r is 2 or more, the structures in the parentheses are the same or different from each other, y5 and y6 are integers of 1 to 20, and when y5 and y6 are 2 or more, the structures in the parentheses are the same or different from each other, A5 and A6 are the same or different and each independently represent CRR'; R and R' are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; * indicates a site linked to the main chain of the resin. Lc and Ld are each selected from the following structural formulas:

[0160] [ka]

[0161] In the structural formula: Each X is independently O or S; R11 and R12 are the same or different and each independently represent a substituted or unsubstituted alkylene group or a substituted or unsubstituted cycloalkylene group; a and b are each an integer of 0 to 50, and when a and b are each 2 or more, the structures in each parentheses are the same or different.

[0162] In one embodiment of the present specification, a resin including a unit represented by Chemical Formula 1 increases the refractive index of a material composed of the molecules by increasing the molecular electron density and reducing the molecular volume, as shown in the Lorentz-Lorenz formula, which is a relationship between molecular structure and refractive index. Furthermore, since the core structure of Chemical Formula 1 is a derivative of BHEBN (2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene), a derivative of BPA (bisphenol A), it has a small molecular volume and excellent packing ability, thereby improving the refractive index of the resin. Furthermore, since the core structure of Chemical Formula 1 is based on fluorene, it has anisotropic optical properties and therefore low birefringence. Furthermore, it has a high refractive index due to its high electron density. Therefore, a resin composition according to one embodiment of the present specification has a high refractive index and high transparency, and optical lenses, optical films, or optical resins made therefrom can be thin and exhibit excellent optical properties.

[0163] In one embodiment of the present specification, the ultraviolet stabilizers are three or more types.

[0164] In one embodiment of the present specification, the ultraviolet stabilizer may include three or more selected from an oxamide-based UV absorber, a benzophenone-based UV absorber, a triazine-based UV absorber, and a HALS (hindered amine light stabilizer)-based UV absorber.

[0165] The oxamide UV absorber may be at least one selected from the group consisting of N-(2-ethoxyphenyl)-N'-(2-ethylphenyl)(Tinuvin 312), 4,4'-dioctyloxyoxanilide, 2,2'-diethoxyoxanilide, 2,2'-dioctyloxy-5,5'-di-t-butylanilide, 2,2'-didodecyloxy-5,5'-di-t-butylanilide, 2-ethoxy-2'-ethyloxanilide, N,N'-bis(3-dimethylaminopropyl)oxamide, 2-ethoxy-5-t-butyl-2'-ethoxyanilide, and 2-ethoxy-5,4'-di-t-butyl-2'-ethyloxanilide.

[0166] The benzophenone-based UV absorber may be at least one selected from the group consisting of 2-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, bis(5-benzoyl-4-hydroxy-2-methoxyphenyl)methane, and 2,2',4,4'-tetrahydroxybenzophenone.

[0167] The triazine-based UV absorber may be 6-[4,6-bis(4-phenylphenyl)-1,2-dihydro-1,3,5-triazin-2-ylidene]-3-[(2-ethylhexyl)oxy]cyclohexa-2,4-dien-1-one (Tinuvin 1600), 6-methylheptyl 2-[4-[4,6-bis(4-phenylphenyl)-1H-1,3,5-triazin-2-ylidene]-3-oxocyclohexa-1,5-dien-1-yl]oxypropanoate (Tinuvin 479), or 2-[4-[4,6-bis(4-phenylphenyl)-1H-1,3,5-triazin-2-ylidene]-3-oxocyclohexa-1,5-dien-1-yl]oxypropanoate (Tinuvin 479)), 2,4-diphenyl-6-(2-hydroxy-4-methoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy-4-ethoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy-4-butoxyphenyl)-1,3,5-triazine, 2,6-diphenyl-4-(2-hydroxy-4-hexyloxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy-4-benzyloxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-4-benzyloxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-4-ethoxyethoxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-4-butoxyethoxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-4-methoxycarbonylpropyloxyphenyl)-1,3,5-triazine, 2,4,It may be one or more selected from the group consisting of 6-tris(2-hydroxy-3-methyl-4-ethoxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-3-methyl-4-hexyloxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-3-methyl-4-ethoxyethoxyphenyl)-1,3,5-triazine, 2,4,6-tris(2-hydroxy-3-methyl-4-ethoxycarbonylethyloxyphenyl)-1,3,5-triazine, 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-N-octyloxyphenyl)-1,3,5-triazine, and 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(2-(2-ethylhexanoyloxy)ethoxy)phenol.

[0168] The HALS UV absorbers include Tinuvin 5866, 4-[2-(4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)ethoxy]-4-oxobutanoic acid (Tinuvin 622), and Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate (Tinuvin 144). malonate (Tinuvin 144)), bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, bis(2,2,6,6-tetramethyl-4-piperidinyl) succinate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, bis(N-octoxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, bis(N-benzyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, Bis(N-cyclohexyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) 2-(3,5-di-t-butyl-4-hydroxybenzyl)-2-butylmalonate, bis(1-acryloyl-2,2,6,6-tetramethyl-4-piperidinyl) 2,2-bis(3,5-di-t-butyl-4-hydroxybenzyl)-2-butylmalonate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) tetramethyl-4-piperidinyl decanedioate, 2,2,6,6-tetramethyl-4-piperidinyl methacrylate, 4-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy]-1-[2-(3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy)ethyl]-2,2,6,6-tetramethylpiperidine, 2-methyl-2-(2,2,6,6-tetramethyl-4-piperidinyl)amino-N-(2,2,6,6-Tetramethyl-4-piperidinyl)propionamide, tetrakis(2,2,6,6-tetramethyl-4-piperidinyl)1,2,3,4-butanetetracarboxylate, tetrakis(1,2,2,6,6-pentamethyl-4-piperidinyl)1,2,3,4-butanetetracarboxylate, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 1,2,2,6,6-pentamethyl-4-piperidinol and 1-tridecanol, 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperidinol and mixed esters of 1-tridecanol, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 1,2,2,6,6-pentamethyl-4-piperdinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5·5]undecane, and mixed esters of 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperdinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5·5]undecane chlorine, polycondensation product of dimethyl succinate and 1-(2-hydroxyethyl)-4-hydroxy-2,2,6,6-tetramethylpiperidine, poly[(6-morpholino-1,3,5-triazine-2,4-diyl)((2,2,6,6-tetramethyl-4-piperidinyl)imino)hexamethylene((2,2,6,6-tetramethyl-4-piperidinyl)imino)], poly[(6-(1,1,3,3-tetramethylbutyl)imino-1,3,5-triazine-2,4-diyl((2,2,6,6-tetramethyl-4-piperidyl)imino)hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl)imino)], polycondensate of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine and 1,2-dibromoethane, N,N',4,7-tetrakis[4,6-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-1,3,5-triazin-2-yl]-4,7-diazadecane-1,10-diamine, N,N',4-tris[4,6-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-1,3,The diamine may be one or more selected from the group consisting of N,N',4,7-tetrakis[4,6-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-1,3,5-triazin-2-yl]-4,7-diazadecane-1,10-diamine, N,N',4,7-tetrakis[4,6-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-1,3,5-triazin-2-yl]-4,7-diazadecane-1,10-diamine, and N,N',4-tris[4,6-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-1,3,5-triazin-2-yl]-4,7-diazadecane-1,10-diamine.

[0169] In one embodiment of the present specification, the content of the UV stabilizer may be 0.1 to 20 parts by weight, or 1 to 10 parts by weight, relative to 100 parts by weight of the total weight of the resin containing the unit represented by Chemical Formula 1 and the resin containing the unit represented by Chemical Formula 2. When the content of the UV stabilizer is within this range, both the optical properties and the UV blocking effect may be excellent. If the content of the UV stabilizer is less than 0.1 part by weight, the UV resistance due to the UV stabilizer may not be fully realized. However, if the content of the UV stabilizer exceeds 20 parts by weight, the yellowness index of the resin composition may increase above a reference value, and the transparency may decrease, which is undesirable.

[0170] In particular, in one embodiment of the present specification, the ultraviolet stabilizer may include three or more, four or more, or five or more selected from the following compounds:

[0171] [ka]

[0172] In one embodiment of the present specification, the resin composition may further contain a photoinitiator.

[0173] The photoinitiator is a compound that generates active species when irradiated with active energy rays. The active energy rays can be defined as energy rays that can decompose a compound that generates active species to generate active species. Examples of such active energy rays include light energy rays such as visible light, ultraviolet light, infrared light, X-rays, α-rays, β-rays, and γ-rays. However, it is preferable to use ultraviolet light as the active energy rays because it has a predetermined energy level and a fast curing rate.

[0174] The photoinitiator may include, but is not limited to, a benzophenone-based, acetophenone-based, triazine-based, thioxanthone-based, benzoin-based, phosphorus-based, oxime-based, or a mixture thereof, and may include any photoinitiator used in the art.

[0175] Specific examples of the benzophenone-based photoinitiator include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4'-bis(dimethylamino)benzophenone, 4,4'-dichlorobenzophenone, 3,3'-dimethyl-2-methoxybenzophenone, and mixtures thereof, but are not limited to these. Specific examples of the acetophenone-based photoinitiator include acetophenone, 2,2-dimethylpropiophenone, 3-hydroxy-3-methyl-1-phenylbutan-1-one, 2,2-dimethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenyl ketone (Irgacure 184), 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Irgacure 184), and the like. TPO), 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide), 2-(dimethylamino)-1-[4-(morpholinyl)phenyl]-2-phenylmethyl-1-butanone, 2-hydroxy-2-methyl-[4-(1-methylvinyl)phenyl]propanol oligomer, 2,2'-diethoxyacetophenone, 2,2'-dibutoxyacetophenone, 2-hydroxy-2-methylpropiophenone, The photoinitiator may include, but is not limited to, conventional acetophenone-based photoinitiators, such as, but not limited to, pt-butyltrichloroacetophenone, pt-butyldichloroacetophenone, 4-chloroacetophenone, 2,2'-dichloro-4-phenoxyacetophenone, 2-methyl-1-(4-(methylthio)phenyl)-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylpropan-1-one (Irgacure 127), and mixtures thereof.

[0176] Specific examples of the triazine-based photoinitiator include 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloromethyl)-s-triazine, 2-(3',4'-dimethoxystyryl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4'-methoxynaphthyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-methoxyphenyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-tolyl)-4,6-bis(trichloromethyl)-s-triazine, and 2-biphenyl-4,6-bis( The photoinitiator may be, but is not limited to, a typical triazine-based photoinitiator such as 2,4-trichloromethyl(piperonyl)-6-triazine, 2,4-trichloromethyl(4'-methoxystyryl)-6-triazine, 2-(naphth-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxynaphth-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2,4-trichloromethyl(piperonyl)-6-triazine, 2,4-(trichloromethyl(4'-methoxystyryl)-6-triazine, or a mixture thereof.

[0177] Specific examples of the thioxanthone-based photoinitiator include thioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone, and mixtures thereof, but are not limited to these, and may include any common thioxanthone-based photoinitiator without limitation.

[0178] Specific examples of the benzoin-based photoinitiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzil dimethyl ketal, and mixtures thereof, but are not limited thereto, and may include any common benzoin-based photoinitiator without limitation.

[0179] Specific examples of the phosphorus-based photoinitiator include bisbenzoylphenylphosphine oxide, benzoyldiphenylphosphine oxide, and mixtures thereof, but are not limited thereto, and may include, without limitation, any conventional phosphorus-based photoinitiator.

[0180] Specific examples of the oxime-based photoinitiator include 2-(o-benzoyloxime)-1-[4-(phenylthio)phenyl]-1,2-octanedione, 1-(o-acetyloxime)-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone, (1-hydroxycyclohexyl)(phenyl)methanone-O-acetyloxime, and mixtures thereof, but are not limited to these, and may include, without limitation, any conventional oxime-based photoinitiator.

[0181] According to one embodiment of the present specification, the photoinitiator has the following formula P:

[0182] [ka]

[0183] In the formula P, Q1 is O or NG6, G1 to G6 are the same or different and each independently represent hydrogen; a substituted or unsubstituted ester group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; Lb is hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted phosphine oxide group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; lb is an integer from 1 to 10, When the lb is 2 or more, the two or more Lb's are the same or different from each other.

[0184] In particular, in one embodiment of the present specification, the photoinitiator may include the following compound:

[0185] [ka]

[0186] In one embodiment of the present specification, the resin containing the unit represented by Chemical Formula 1 and the resin containing the unit represented by Chemical Formula 2 have a curing wavelength of approximately 330 nm to 350 nm. Therefore, an ultraviolet stabilizer that absorbs UV at wavelengths exceeding 350 nm can be effective when irradiated with UV. In other words, if the ultraviolet stabilizer absorbs UV at wavelengths of 330 nm to 350 nm, the resin composition may not be cured, which is not preferable.

[0187] In one embodiment of the present specification, the refractive index of the resin composition measured at a wavelength of 587 nm may be 1.5 or more, may be 1.55 to 1.70, or may be 1.60 to 1.65. When the resin composition satisfies the above refractive index, when it is applied to a molded product such as an optical lens, it becomes possible to produce a thin and lightweight optical lens.

[0188] In one embodiment of the present specification, the Abbe number of the resin composition measured and calculated at wavelengths of 486 nm, 587 nm, and 656 nm may be 10 to 40. It may be preferably 15 to 38, more preferably 20 to 35, and even more preferably 24.9 to 30.1. When the resin composition satisfies the above Abbe number range, when the resin composition is applied to a molded product such as an optical lens, it has the effect of reducing dispersion and increasing clarity.

[0189] Specifically, the Abbe number is the refractive index (n D , n F , n C ) and the Abbe number can be calculated using the following formula:

[0190] Abbe number = (n D -1) / (n F -n C )

[0191] The refractive index can be measured by a prism coupler method, for example, SPA-3DR manufactured by SAIRON Technology, but is not limited thereto.

[0192] Using a prism coupler, the resin can be placed on a 200°C heating plate, and a flat sample of the resin can be prepared by measuring the change in the amount of light reflected by the sample. When the prepared sample is placed in contact with the prism and a laser beam is incident on the prism, most of it is totally reflected. However, if certain incident angles and conditions are met, an evanescent field is generated at the interface, and the light is coupled. By measuring the angle at which the intensity of the coupled light detected by the detector drops sharply, the prism coupler can automatically calculate the refractive index of the film from parameters related to the light's polarization mode and the refractive indices of the prism and substrate.

[0193] Another embodiment of the present specification provides an article comprising the resin composition or a cured product thereof. The article may be, but is not limited to, a coating material, a curable material, a lens material, an optical substrate material, or the like. [Example]

[0194] <Example> <Examples 1 to 8 and Comparative Examples 1 to 9> The components and content ratios shown in Tables 1 to 3 below were mixed, and 3 parts by weight of a photoinitiator of the following structural formula was added and further stirred.

[0195] [ka]

[0196] The resulting mixture was coated onto a 400 μm thick polycarbonate bare film and then irradiated with UV light to form a 20 μm thick coating layer using a micrometer film applicator.

[0197] [Table 1] [Table 2] [Table 3]

[0198] [ka] [ka] [ka] [ka] [ka]

[0199] <Experimental Example 1> The properties of the resin compositions prepared in the above Examples and Comparative Examples were evaluated and are shown in Tables 4 and 5 below.

[0200] [Table 4] [Table 5]

[0201] As can be seen from the above results, the resin compositions according to Examples 1 to 8 satisfy the condition that the color difference change rate value (Eab1) on the first day (n=1) of ultraviolet irradiation according to Equation 1 is 10.0 or less, while the color difference change rate value (Eab1) of the resin compositions according to Comparative Examples 1, 4 and 7 exceeds 10.0.

[0202] Therefore, the resin compositions of Examples 1 to 8 are applicable to products because they do not significantly discolor or deteriorate when exposed to UV rays. However, the resin compositions of Comparative Examples 1, 4, and 7 may experience changes in wavelength-specific light transmittance when exposed to UV rays, potentially causing severe discoloration and deterioration that would make them difficult to apply to products in the fields of optical mobiles, automobiles, and electronic materials.

[0203] In addition, the resin compositions of Comparative Examples 2, 5, and 8 did not cure because the absorption wavelength (330 nm) of the ultraviolet stabilizer (6) was the same as the curing wavelength (330 nm to 350 nm) of the resin composition. In addition, the resin compositions of Comparative Examples 3, 6, and 9 were opaque because the ultraviolet stabilizer was not dissolved, and as a result, they could not be used as optical materials.

Claims

1. A resin containing a unit represented by the following chemical formula 1: A resin containing a unit represented by the following chemical formula 2: at least two ultraviolet light stabilizers; A resin composition comprising: The color difference change rate (Eab) of the resin composition after UV irradiation on the first day (n=1) was calculated by the following mathematical formula 1: １ ) is 10.0 or less: [Mathematical formula 1] Eab ｎ ={(L ｎ -L ｎ－１ ) ２ +(a ｎ -a ｎ－１ ) ２ +(b ｎ -b ｎ－１ ) ２ } １／２ In the above mathematical formula 1, L ｎ－１ is the brightness index of the resin composition on the (n-1)th day of ultraviolet irradiation, a ｎ－１ and b ｎ－１ are the color coordinates of the resin composition on the (n-1)th day of ultraviolet irradiation, L ｎ is the brightness index of the resin composition on the nth day after ultraviolet irradiation, a ｎ and b ｎ is the color coordinate of the resin composition on the nth day after ultraviolet irradiation, 【Chemistry 1】 In the above Chemical Formulas 1 and 2, L11 is any one of the following chemical formulae A-1, B-1, and C-1: Y1, Y2, Y3, and Y4 are the same or different and each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X1, X2, X7, and X8 are the same or different and each independently represent C═O or a substituted or unsubstituted alkylene group; X3, X4, X5, and X6 are the same or different and each independently represent O or S; Z1 and Z2 are the same or different and each independently represent a substituted or unsubstituted alkylene group, a substituted or unsubstituted heteroalkylene group, or a substituted or unsubstituted cycloalkylene group; p is an integer of 0 to 8, and when p is 2 or more, the structures in parentheses are the same or different from each other; L a is a substituted or unsubstituted divalent or higher alkyl group, a substituted or unsubstituted divalent or higher cycloalkyl group, a substituted or unsubstituted divalent or higher heteroalkyl group, a substituted or unsubstituted divalent or higher aryl group, or a substituted or unsubstituted divalent or higher heteroaryl group, and when p is 0, L a is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, X9, X10, X11, and X12 are the same or different and each independently represent a divalent amide group, a divalent urethane group, a divalent urea group, a divalent ester group, O, or S; Z and Z are the same or different and each independently represent a substituted or unsubstituted alkylene group, a substituted or unsubstituted heteroalkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group; n1, n2, n3, and n4 each represent an integer of 0 to 20, and when n1, n2, n3, and n4 each represent an integer of 2 or more, the structures in each parentheses may be the same or different from each other, y1, y2, y3, and y4 are each an integer of 1 to 20, and when y1, y2, y3, and y4 are 2 or more, the structures in the parentheses may be the same or different. A1 to A4 are the same or different and each independently represents CRR′; R and R' are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; * indicates a site connected to the main chain of the resin. 【Chemistry 2】 In the above chemical formulas A-1, B-1, and C-1, L1 and L2 are the same or different and each independently represent a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group; R1 to R8 are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; a fused ring group of a substituted or unsubstituted aromatic hydrocarbon ring and an aliphatic hydrocarbon ring; or a substituted or unsubstituted heteroaryl group, or adjacent groups may be bonded to each other to form a hydrocarbon ring; r1 and r2 are each an integer of 0 to 6, and when r1 and r2 are each 2 or more, the structures in each bracket are the same or different. r3, r4, r7, and r8 each represent an integer of 0 to 4, and when r3, r4, r7, and r8 each represent 2 or more, the structures in each bracket are the same or different from each other, ** is the site that binds to Chemical Formula 1.

2. The resin composition according to claim 1, wherein the chemical formula 1 is any one of the following chemical formulas 1-1 to 1-3: 【Transformation 3】 In the above chemical formulas 1-1 to 1-3, Z1, Z2, X1 to X6, n1, n2, Y1, Y2, y1, y2, A1, A2, and * are defined as in Chemical Formula 1 above. R1, r1, R2, and r2 are defined as in Chemical Formula A-1. L1, L2, R3, r3, R4, and r4 are as defined in Chemical Formula B-1. The definitions of R5 to R8, r7 and r8 are as defined in the above chemical formula C-1.

3. The resin composition according to claim 1, wherein the unit represented by Chemical Formula 2 includes a unit derived from one or more of the following compounds: 【Chemistry 4】 【Transformation 5】 In the structural formula, m, n, and k are each an integer of 0 to 20.

4. The resin composition according to claim 1 , wherein the ultraviolet stabilizer is three or more types.

5. The resin composition according to claim 1 , wherein the ultraviolet stabilizer comprises three or more compounds selected from the following compounds: 【Transformation 6】

6. The resin composition according to claim 1, wherein the unit represented by Chemical Formula 1 includes a unit derived from one or more of the following compounds: 【Transformation 7】 【Transformation 8】 【Chemistry 9】 【Chemistry 10】 【Chemistry 11】 【Chemistry 12】 【Chemistry 13】 【Chemistry 14】 In the structural formula, a and b are each an integer of 0 to 20.

7. The resin composition of claim 1 , further comprising a photoinitiator.

8. The resin composition according to claim 1, wherein the resin composition has a refractive index of 1.5 or more as measured at 587 nm.

9. The resin composition according to claim 1, further comprising a resin containing a unit represented by the following chemical formula 3: 【Chemistry 15】 In the above Chemical Formula 3, Y5 and Y6 are the same or different and each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X13 and X14 are the same or different and each independently represent C═O or a substituted or unsubstituted alkylene group; X15, X16, X17, and X19 are the same or different and each independently represent O or S; X18 is C=O, 【Chemistry 16】 and r is an integer of 0 to 6, and when r is 2 or more, the structures in the parentheses are the same or different from each other, y5 and y6 are integers of 1 to 20, and when y5 and y6 are 2 or more, the structures in the parentheses are the same or different from each other, A5 and A6 are the same or different and each independently represent CRR'; R and R' are the same or different and each independently represent hydrogen; a substituted or unsubstituted alkyl group; a substituted or unsubstituted heteroalkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group; * indicates a site connected to the main chain of the resin. Lc and Ld are each selected from the following structural formulas: 【Chemistry 17】 In the structural formula: Each X is independently O or S; R and R are the same or different and each independently represent a substituted or unsubstituted alkylene group or a substituted or unsubstituted cycloalkylene group; a and b are each an integer of 0 to 50, and when a and b are each 2 or more, the structures in each parentheses are the same or different.

10. 2. The resin composition according to claim 1, wherein the content of the ultraviolet stabilizer is 0.1 parts by weight to 20 parts by weight, based on 100 parts by weight of the total weight of the resin including the unit represented by Chemical Formula 1 and the resin including the unit represented by Chemical Formula 2.

11. An article comprising the resin composition according to any one of claims 1 to 10 or a cured product thereof.

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