Thermoplastic resin composition and optical member using the same

Abstract

To provide a thermoplastic resin composition which cuts visible light and has infrared light permeability.SOLUTION: In a thermoplastic resin composition that contains a thermoplastic resin and a coloring material, has a refractive index at a wavelength of 894 nm of 1.60 or more, and has thickness of 1 mm, a maximum value of transmittance at a wavelength of 380 nm to 630 nm is more than 0% and 1.00% or less and average transmittance at a wavelength of 840 nm to 940 nm is 80% or more.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a thermoplastic resin composition, more specifically, to a thermoplastic resin composition containing a high refractive index material, and an optical lens using the thermoplastic resin composition. [Background technology]

[0002] Infrared cameras and infrared sensors are used to visualize the infrared light emitted from an object as a change in the amount of infrared light caused by changes in the object's temperature, and are more stable in operation in dark places than when detecting with visible light, etc. Infrared cameras and infrared sensors are widely used in a variety of applications, including diagnosis in the medical field, non-destructive testing to detect deterioration in buildings and electrical equipment, night vision cameras in the security field, and personal authentication such as biometric cameras in ATMs at financial institutions and airports.

[0003] In general, infrared cameras and infrared sensors are equipped with semiconductors such as silicon semiconductors as devices for detecting infrared rays. However, such semiconductors detect not only infrared rays but also visible light. Therefore, materials used in lenses for infrared cameras / sensors are required to have the properties of detecting infrared rays and blocking visible light.

[0004] Conventionally, optical glass or optical resins have been used as materials for optical elements used in the optical systems of various cameras such as cameras, film-integrated cameras, video cameras, etc. Among these, visible light-cutting materials made of bisphenol A-polycarbonate and the like are known as optical resins that detect infrared rays and cut visible light, and are used in infrared transmission filters and the like (Patent Documents 1 to 3).

[0005] However, a thermoplastic resin composition containing a high refractive index material and an optical lens using the thermoplastic resin composition are not known. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 55-62410 [Patent Document 2] International Publication No. 2015 / 056734 [Patent Document 3] Special Publication No. 62-53801 Summary of the Invention [Problem to be solved by the invention]

[0007] There is a demand for the development of a thermoplastic resin composition containing a high refractive index material as a material that blocks visible light and transmits infrared light, and an optical lens using the resin composition. [Means for solving the problem]

[0008] As a result of extensive research, the inventors have developed a thermoplastic resin composition containing a thermoplastic resin and a colorant as a material for optical lenses that blocks visible light and has infrared light transmittance, thereby completing the present invention.

[0009] That is, the present invention includes the following embodiments.

[0010] (1) A thermoplastic resin composition comprising a thermoplastic resin and a colorant, The refractive index at a wavelength of 894 nm is 1.60 or more, In the case of the thermoplastic resin composition having a thickness of 1 mm, the maximum transmittance at a wavelength of 380 nm to 630 nm is more than 0% and 1.00% or less, and the average transmittance at a wavelength of 840 nm to 940 nm is 80% or more. Thermoplastic resin composition.

[0011] (2) The thermoplastic resin composition according to (1) above, wherein the thermoplastic resin comprises a resin selected from the group consisting of polycarbonate resins, polyester resins, and polyester carbonate resins.

[0012] (3) The thermoplastic resin composition according to (2) above, wherein the thermoplastic resin contains, as a monomer, a diol compound selected from the group consisting of compounds represented by the following general formulas (I), (II), and (III): [ka] (In general formula (I), R1 to R4 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms which may contain a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, an alkenyl group having 2 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aralkyl group having 7 to 17 carbon atoms; p, q, r, and s each independently represent an integer of 0 to 4; R is [ka] and Here, i represents an integer from 0 to 10, ii represents an integer from 1 to 10, and iii represents an integer from 1 to 10. [ka] (In general formula (II), R6 and R7 are defined as R1 to R4. n and m each represent an integer of 0 to 5; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10. [ka] (In general formula (III), R8 and R9 are the same as R1 to R4. a and b represent integers of 0 to 4; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10.

[0013] (4) The thermoplastic resin composition according to any one of the above (1) to (3), wherein the coloring material includes at least one of a green pigment, a red pigment, a yellow pigment, and a purple pigment.

[0014] (5) The thermoplastic resin composition according to any one of the above (1) to (3), wherein the coloring material includes at least one of anthraquinone pigments, perinone pigments, methine pigments, isoindoline pigments, phthalocyanine pigments, quinacridone pigments, azo pigments, and lake pigments.

[0015] (6) The thermoplastic resin composition according to any one of (1) to (5) above, wherein the thermoplastic resin composition has a thickness of 1 mm and a maximum transmittance at a wavelength of 380 nm to 630 nm of more than 0% and not more than 0.8%.

[0016] (7) The thermoplastic resin composition according to any one of (1) to (6) above, wherein the thermoplastic resin composition has a thickness of 1 mm and a maximum transmittance at a wavelength of 380 nm to 630 nm of more than 0% and not more than 0.5%.

[0017] (8) An optical lens comprising the thermoplastic resin composition according to any one of (1) to (7) above.

[0018] (9) A lens for an infrared camera, comprising the thermoplastic resin composition according to any one of (1) to (7) above.

[0019] (10) A lens for a biometric authentication camera, comprising the thermoplastic resin composition according to any one of (1) to (7) above. Effect of the Invention

[0020] The thermoplastic resin composition containing the high refractive index material of the present invention has infrared transmittance and cuts visible light, thereby reducing noise caused by visible light. Therefore, an optical lens using the thermoplastic resin composition of the present invention can improve the image accuracy of an infrared camera or an infrared sensor. In addition, by using the thermoplastic resin composition of the present invention in an optical lens, the degree of the optical lens can be increased and the number of lenses can be reduced. Furthermore, compared to a method of cutting visible light such as an infrared transmission filter, it is possible to make it filter-free, thereby reducing the number of parts and achieving a low height. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The present invention will be described in detail below.

[0022] 1.Thermoplastic resin composition The present invention provides a thermoplastic resin composition comprising a thermoplastic resin and a colorant.

[0023] (A) Thermoplastic resin In one embodiment of the present invention, the thermoplastic resin that can be used in the thermoplastic resin composition may include, but is not limited to, polycarbonate resin, polyester resin, and polyester carbonate resin. In a preferred embodiment of the present invention, the thermoplastic resin composition is a polycarbonate resin.

[0024] In one embodiment of the present invention, a thermoplastic resin that can be used in the thermoplastic resin composition may contain, as a monomer, a diol compound selected from the group consisting of compounds represented by the following general formula (I), general formula (II), and general formula (III).

[0025] [ka] (In general formula (I), R1 to R4 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms which may contain a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, an alkenyl group having 2 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aralkyl group having 7 to 17 carbon atoms; p, q, r, and s each independently represent an integer of 0 to 4; R is [ka] and Here, i represents an integer from 0 to 10, ii represents an integer from 1 to 10, and iii represents an integer from 1 to 10.

[0026] [ka] (In general formula (II), R6 and R7 are defined as R1 to R4. n and m each represent an integer of 0 to 5; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10.

[0027] [ka] (In general formula (III), R8 and R9 are the same as R1 to R4. a and b represent integers of 0 to 4; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10.

[0028] Specific examples of the monomer represented by the above general formula (I) include 9,9-bis(4-hydroxy-3-ethylphenyl)fluorene, 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene, 9,9-bis[4-(2-hydroxyethoxy)-3-methylphenyl]fluorene, 9,9-bis[4-(2-hydroxyethoxy)-3-tert-butylphenyl]fluorene, 9,9-bis[4- (2-hydroxyethoxy)-3-isopropylphenyl]fluorene, 9,9-bis[4-(2-hydroxyethoxy)-3-cyclohexylphenyl]fluorene, 9,9-bis[4-(2-hydroxyethoxy)-3-phenylphenyl]fluorene, 4-(9-(4-hydroxyethoxy)phenyl)-9H-fluoren-9-yl)phenol, 2,2'(9H-fluorene-9,9'-diyl)bis(ethan-1-ol), 9H-fluorene-9,9-diyl)dimethanol, etc. may be mentioned, but are not limited thereto. These monomers may be used alone or in combination of two or more kinds.

[0029] Among the monomers represented by the above general formula (I), 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene, 9,9-bis[4-(2-hydroxyethoxy)-3-phenylphenyl]fluorene, and 9,9-bis[4-(2-hydroxy)phenyl]fluorene are preferred, and 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene and 9,9-bis[4-(2-hydroxyethoxy)-3-phenylphenyl]fluorene are more preferred.

[0030] Specific examples of the monomer represented by the above general formula (II) include 2,2'-bis(1-hydroxymethoxy)-1,1'-binaphthalene, 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "BHEBN"), 2,2'-bis(3-hydroxypropyloxy)-1,1'-binaphthalene, 2,2'-bis(4-hydroxybutoxy)-1,1'-binaphthalene, 2,2'-bis(2-hydroxyethoxy)-6,6'-diphenyl-1,1'-binaphthalene (also referred to as "BINL-2EO"), 9,9-bis(6- (2-hydroxyethoxy)naphthalen-2-yl)fluorene (also referred to as "BNEF"), 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "BNE"), 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene (also referred to as "BPEF"), 9,9-bis(4-(2-hydroxyethoxy)-3-phenylphenyl)fluorene (also referred to as "BPPEF"), 2,2'-bis(2-hydroxyethoxy)-6,6'-di(naphthalen-1-yl)-1,1'-binaphthalene (also referred to as "DNBINOL" -2EO"), 2,2'-bis(2-hydroxyethoxy)-6,6'-di(naphthalen-2-yl)-1,1'-binaphthalene (also referred to as "2DNBINOL-2EO"), 2,2'-bis(2-hydroxyethoxy)-6,6'-di(phenanthren-9-yl)-1,1'-binaphthalene (also referred to as "9DPNBINOL-2EO"), 6,6'-di-(3-cyanophenyl)-2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "CN-BNA"), 6,6'-di-(dibenzo[b,d]furan 6,6'-di-(dibenzo[b,d]thien-4-yl)-2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "FUR-BNA"), 6,6'-di-(dibenzo[b,d]thien-4-yl)-2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "THI-BNA"), 2,2'-bis(2-hydroxyethoxy)-6,6'-di(naphthalen-2-yl-ethynyl)-1,1'-binaphthalene (also referred to as "D2NACBHBNA"), 2,2'-bis(2-hydroxyethoxy)-6,6'-di(phenylethynyl)-1,Examples of the monomers represented by the general formula (II) include, but are not limited to, 1'-binaphthalene (also referred to as "DPACBHBNA"). Among the monomers represented by the general formula (II) above, 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene is preferred.

[0031] The monomer represented by the above general formula (III) specifically includes, but is not limited to, 9,9-bis[6-(1-hydroxymethoxy)naphthalene-2-yl]fluorene, 9,9-bis[6-(2-hydroxyethoxy)naphthalene-2-yl]fluorene, 9,9-bis[6-(3-hydroxypropoxy)naphthalene-2-yl]fluorene, and 9,9-bis[6-(4-hydroxybutoxy)naphthalene-2-yl]fluorene. Among the monomers represented by the above general formula (III), 9,9-bis[6-(2-hydroxyethoxy)naphthalene-2-yl]fluorene is preferred.

[0032] In one embodiment of the present invention, the thermoplastic resin may be a monocomponent resin prepared by using only one diol compound selected from the group consisting of the compounds represented by the general formulas (I), (II), and (III) as a monomer, a binary resin prepared by using two kinds, a ternary resin prepared by using three kinds, or a quaternary resin prepared by using four kinds. Alternatively, in one embodiment of the present invention, the thermoplastic resin may be a blend of two or more resins selected from the monocomponent resins, binary resins, ternary resins, and quaternary resins.

[0033] In one embodiment of the present invention, the thermoplastic resin may contain, as a monomer, a diol compound other than the diol compound selected from the group consisting of the compounds represented by the general formula (I), general formula (II), and general formula (III). Examples of such other diol compounds include 4,4'-biphenyldiol, bis(4-hydroxyphenyl)methane, bis(2-hydroxyphenyl)methane, 2,4'-dihydroxydiphenylmethane, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfone, 2,4'-dihydroxydiphenylsulfone, bis(2-hydroxyphenyl)sulfone, bis(4-hydroxy-3-methylphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)ketone, 1,1-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 1,1-bis(4-hydroxy-3-methylphenyl)ethane, bis(4-hydroxy-3-methylphenyl)ethane, nyl)methane, 2,2-bis(4-hydroxy-3-t-butylphenyl)propane, 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxy-3-methylphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)cycloundecane, 1,1-bis(4-hydroxyphenyl)cyclododecane, 2,2-bis(4-hydroxy-3-allylphenyl)propane, 3,3,5-trimethyl-1,1 -Bis(4-hydroxyphenyl)cyclohexane, α,ω-bis[3-(o-hydroxyphenyl)propyl]polydimethyldiphenyl random copolymer siloxane, α,ω-bis[3-(o-hydroxyphenyl)propyl]polydimethylsiloxane, 4,4'-[1,4-phenylenebis(1-methylethylidene)]bisphenol, 4,4'-[1,3-phenylenebis(1-methylethylidene)]bisphenol, adamantane, 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)-2-ethylhexane, 1,1-bis(4-hydroxyphenyl)-2-methylpropane, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)decane, 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, 2,2-bis(4-(2-hydroxyethoxy)phenyl)propane, 4,4-bis(2-hydroxyethoxy)biphenyl, 2,2'-( 1,4-phenylene)bis(ethan-1-ol), 2,2'-(1,4-phenylene)bis(methane-1-ol), 2,2'-(1,4-phenylenebis(oxy))bis(ethan-1-ol), 1,1-bis(4-hydroxyphenyl)cyclododecane, 1,1-bis(4-hydroxy-3-methylphenyl)cyclododecane, 1,1-bis(4-hydroxy-3-phenylphenyl)cyclododecane, 1,1-bis(4-hydroxy-3-t-butylphenyl)cyclododecane ) cyclododecane, 1,1-bis(4-hydroxy-3-sec-butylphenyl) cyclododecane, 1,1-bis(4-hydroxy-3-allylphenyl) cyclododecane, 1,1-bis(4-hydroxy-3,5-dimethylphenyl) cyclododecane, 1,1-bis(4-hydroxy-3-fluorophenyl) cyclododecane, 1,1-bis(4-hydroxy-3-chlorophenyl) cyclododecane, 1,1-bis(4-hydroxy-3-bromophenyl) cyclododecane, 7-ethyl-1,1-bis(4-hydroxyphenyl) cyclododecane, 5,6-dimethyl-1,1-bis(4-hydroxyphenyl) cyclododecane, pentacyclopentadecanedimethanol, 1,4-cyclohexanedimethanol, 1,3-adamantanedimethanol, decalin-2,6-dimethanol, tricyclodecanedimethanol, fluorene glycol, fluorene diethanol, isosorbide, and the like, but are not limited thereto. The other diol compound is preferably 2,2-bis(4-hydroxyphenyl)propane.

[0034] In one embodiment of the present invention, when the thermoplastic resin contains a polyester resin and / or a polyester carbonate resin, these resins may contain a compound represented by the following general formula (V) as a monomer. [ka] (In general formula (V), R1 and R2 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms which may contain a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, an alkenyl group having 2 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aralkyl group having 7 to 17 carbon atoms; a and b represent integers of 0 to 4.

[0035] In one embodiment of the present invention, the thermoplastic resin may include any of a random copolymer structure, a block copolymer structure, and an alternating copolymer structure.

[0036] In one embodiment of the present invention, the polystyrene-equivalent weight average molecular weight (Mw) of the thermoplastic resin may be preferably 20,000 to 200,000. The polystyrene-equivalent weight average molecular weight (Mw) of the thermoplastic resin is more preferably 25,000 to 120,000, further preferably 28,000 to 55,000, and particularly preferably 30,000 to 45,000. If the polystyrene-equivalent weight average molecular weight (Mw) of the thermoplastic resin is within the above range, it is possible to prevent the molded body from becoming brittle, to prevent the melt viscosity from becoming excessively high, to facilitate removal of the resin after production, and to improve the fluidity and facilitate injection molding in a molten state.

[0037] In another embodiment of the present invention, the thermoplastic resin composition can be used to manufacture an optical lens by blending the above-mentioned thermoplastic resin with other resins, such as, but not limited to, polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polyethylene terephthalate, polybutylene terephthalate, etc.

[0038] (B) Color material The coloring material is not particularly limited as long as it can be used in the thermoplastic resin composition of the present invention, and for example, dyes and pigments, organic coloring materials, inorganic coloring materials, etc. can be used. In one embodiment of the present invention, the coloring material that can be used in the thermoplastic resin composition may include at least one of a green pigment, a red pigment, a yellow pigment, and a purple pigment. In a preferred embodiment, the coloring material that can be used in the thermoplastic resin composition includes a green pigment, a red pigment, a yellow pigment, and a purple pigment.

[0039] In one embodiment of the present invention, the colorant that can be used in the thermoplastic resin composition may include at least one of anthraquinone pigments, perinone pigments, methine pigments, isoindoline pigments, phthalocyanine pigments, quinacridone pigments, azo pigments, and lake pigments.

[0040] Examples of green pigments that can be used in the thermoplastic resin composition include anthraquinone-based and perinone-based pigments, and examples of such pigments include Oil Green 5602 manufactured by Arimoto Chemical Industry Co., Ltd., Macrolex Green G manufactured by LANXESS Co., Ltd., and Oplas Green 533 manufactured by Orient Chemical Industry Co., Ltd., but are not limited to these.

[0041] Examples of red pigments that can be used in the thermoplastic resin composition include perinone-based and anthraquinone-based pigments, and examples of such pigments include Oil Red 5303, Fluorescent Red DR-345, Plast Red 8355, 8360, 8365, 8370, D-54, DR-426N, and DR-427N manufactured by Arimoto Chemical Industry Co., Ltd., and Macrolex Red A and Macrolex Red EG manufactured by LANXESS, but are not limited to these.

[0042] Examples of yellow pigments that can be used in the thermoplastic resin composition include methine-based, anthraquinone-based, and perinone-based pigments, and examples of such pigments include Oil Yellow 5001, Plast Yellow 8000, 8005, 8040, 8050, and 8070 manufactured by Arimoto Chemical Industry Co., Ltd., and Macrolex Yellow 6G manufactured by LANXESS, but are not limited to these.

[0043] Examples of purple pigments that can be used in the thermoplastic resin composition include anthraquinone-based and perinone-based pigments, and examples of such pigments include Plast Violet 8840, 8850, and 8855 manufactured by Arimoto Chemical Industry Co., Ltd., and Macrolex Violet 3R manufactured by LANXESS, but are not limited to these.

[0044] (C) Other ingredients In one embodiment of the present invention, the thermoplastic resin composition may include antioxidants and mold release agents as additives.

[0045] Antioxidants include triethylene glycol-bis[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl)propionate], 1,6-hexanediol-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], pentaerythritol-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. butyl-4-hydroxybenzyl)benzene, N,N-hexamethylenebis(3,5-di-tert-butyl-4-hydroxy-hydrocinnamide), 3,5-di-tert-butyl-4-hydroxy-benzylphosphonate-diethyl ester, tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate and 3,9-bis{1,1-dimethyl-2-[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl}-2,4,8,10-tetraoxaspiro(5,5)undecane.

[0046] The content of the antioxidant in the thermoplastic resin composition is preferably 0.50% by mass or less, more preferably 0.10 to 0.40% by mass, and particularly preferably 0.20 to 0.40% by mass.

[0047] The release agent is preferably one that is composed of 90% by mass or more of an ester of alcohol and fatty acid. Specific examples of the ester of alcohol and fatty acid include ester of monohydric alcohol and fatty acid, and partial or full ester of polyhydric alcohol and fatty acid. The ester of monohydric alcohol and fatty acid is preferably an ester of monohydric alcohol having 1 to 20 carbon atoms and saturated fatty acid having 10 to 30 carbon atoms. In addition, the partial or full ester of polyhydric alcohol and fatty acid is preferably a partial or full ester of polyhydric alcohol having 1 to 25 carbon atoms and saturated fatty acid having 10 to 30 carbon atoms.

[0048] Specifically, examples of esters of monohydric alcohols and saturated fatty acids include stearyl stearate, palmityl palmitate, butyl stearate, methyl laurate, isopropyl palmitate, etc. Examples of partial or complete esters of polyhydric alcohols and saturated fatty acids include complete or partial esters of dipentaerythritol, such as stearic acid monoglyceride, stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, stearic acid monosorbitate, behenic acid monoglyceride, capric acid monoglyceride, lauric acid monoglyceride, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol tetrapelargonate, propylene glycol monostearate, biphenyl biphenate, sorbitan monostearate, 2-ethylhexyl stearate, and dipentaerythritol hexastearate.

[0049] The content of the release agent in the thermoplastic resin composition is preferably 0.50% by mass or less, more preferably 0.01 to 0.10% by mass, and particularly preferably 0.03 to 0.05% by mass.

[0050] Further, the thermoplastic resin composition of the present invention may contain other additives such as a processing stabilizer, an ultraviolet absorber, a flowability modifier, a crystal nucleating agent, a reinforcing agent, a dye, an antistatic agent, a bluing agent, and an antibacterial agent.

[0051] (D) Impurities The thermoplastic resin of the present invention may contain impurities such as phenol generated during production, and diol and diester carbonate, which are monomers remaining unreacted. The phenol content in the thermoplastic resin is preferably 0.1 to 3000 ppm, more preferably 0.1 to 2000 ppm, and particularly preferably 1 to 1000 ppm, 1 to 800 ppm, 1 to 500 ppm, or 1 to 300 ppm. The diol content in the thermoplastic resin is preferably 0.1 to 5000 ppm, more preferably 1 to 3000 ppm, even more preferably 1 to 1000 ppm, and particularly preferably 1 to 500 ppm. The diester carbonate content in the thermoplastic resin is preferably 0.1 to 1000 ppm, more preferably 0.1 to 500 ppm, and particularly preferably 1 to 100 ppm. By adjusting the amounts of phenol and diester carbonate contained in the thermoplastic resin, a resin having physical properties according to the purpose can be obtained. The contents of phenol and carbonic acid diester can be appropriately adjusted by changing the polycondensation conditions and the apparatus, and can also be adjusted by the conditions of the extrusion step after the polycondensation.

[0052] If the content of phenol or carbonic acid diester exceeds the above range, problems may occur such as a decrease in strength of the obtained resin molded body, generation of odor, etc. On the other hand, if the content of phenol or carbonic acid diester is below the above range, there is a risk of a decrease in plasticity when the resin is melted.

[0053] 2. Method for producing thermoplastic resin composition In one embodiment of the present invention, the thermoplastic resin can be produced according to the method described in WO2018 / 016516. Specifically, the thermoplastic resin can be produced by reacting a diol compound selected from the group consisting of compounds represented by the following general formula (I), general formula (II), and general formula (III) with a carbonate precursor such as a carbonate diester in the presence of a basic compound catalyst and / or an ester exchange catalyst or in the absence of a catalyst, under heating, and further under normal pressure or reduced pressure, by a melt polycondensation method. The method for producing the thermoplastic resin composition of the present invention is not limited to the above-mentioned method. [ka] (In general formula (I), R1 to R4 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms which may contain a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, an alkenyl group having 2 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aralkyl group having 7 to 17 carbon atoms; p, q, r, and s each independently represent an integer of 0 to 4; R is [ka] and Here, i represents an integer from 0 to 10, ii represents an integer from 1 to 10, and iii represents an integer from 1 to 10. [ka] (In general formula (II), R6 and R7 are defined as R1 to R4. n and m each represent an integer of 0 to 5; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10. [ka] (In general formula (III), R8 and R9 are defined as R1 to R4. a and b represent integers of 0 to 4; Y represents an alkylene group having 1 to 5 carbon atoms; n1 and n2 each independently represent an integer of 0 to 10.

[0054] In one embodiment of the present invention, the thermoplastic resin composition can be produced by melt-kneading the thermoplastic resin produced as described above and a coloring material. The thermoplastic resin of the present invention can be obtained, for example, by mixing in a tumbler, melt-kneading using a twin-screw extruder, or the like, and then strand-cutting into pellets, but is not limited to this method.

[0055] 3. Physical properties of thermoplastic resin composition The thermoplastic resin composition of the present invention, which is a high refractive index material to which a coloring material has been added, blocks visible light and has infrared light transmittance, and therefore, by using the thermoplastic resin composition of the present invention in an optical lens for an infrared camera / sensor, noise originating from visible light can be effectively reduced.

[0056] (A) Refractive index (nD) In one embodiment of the present invention, the thermoplastic resin composition may have a refractive index of 1.60 or more at a wavelength of 894 nm and 23° C. The refractive index of the thermoplastic resin composition of the present invention at a wavelength of 894 nm is preferably 1.61 to 1.71, more preferably 1.62 to 1.70, and particularly preferably 1.64 to 1.68. The thermoplastic resin composition of the present invention has a high refractive index and is suitable as an optical lens material. The refractive index can be measured using a V-block refractometer ("PR-2" manufactured by Carl Zeiss Jena) in accordance with JIS B7071-2.

[0057] (B) Transmittance In one embodiment of the present invention, the thermoplastic resin composition may have a maximum transmittance of more than 0% and not more than 1.00% at wavelengths of 380 nm to 630 nm when the thickness is 1 mm, and an average transmittance of 80% or more at wavelengths of 840 nm to 940 nm when the thickness is 1 mm. The thermoplastic resin composition of the present invention may have a maximum transmittance of preferably more than 0% and not more than 0.8%, more preferably more than 0% and not more than 0.5%, and even more preferably not more than 0.1% when the thickness is 1 mm. In addition, the thermoplastic resin composition of the present invention may have an average transmittance of preferably 85% or more, more preferably 90% or more, and particularly preferably 99% or more at wavelengths of 840 nm to 940 nm when the thickness is 1 mm. If the maximum transmittance at wavelengths of 380 nm to 630 nm and the average transmittance at wavelengths of 840 nm to 940 nm are within the above ranges, noise derived from visible light can be efficiently reduced, and image accuracy can be improved at wavelengths measured by an infrared camera or an infrared sensor. Furthermore, in a preferred embodiment of the present invention, the transmittance at a wavelength of 720 nm may be 50% or less, and the transmittance at a wavelength of 780 nm may be 50% or more. The transmittance at a wavelength of 720 nm is more preferably 40% or less, and even more preferably 35% or less. The transmittance at a wavelength of 780 nm is more preferably 60% or more, and even more preferably 70% or more. The transmittance can be measured in accordance with JIS K7105 using a spectrophotometer (Hitachi High-Technologies Corporation's "U-4100") for a 1 mm thick portion of the stepped flat test piece.

[0058] (C) Glass transition temperature (Tg) In one embodiment of the present invention, the glass transition temperature (Tg) of the thermoplastic resin composition is 90 to 180°C, more preferably 95 to 175°C, even more preferably 100 to 170°C, even more preferably 130 to 170°C, and particularly preferably 135 to 150°C. If the glass transition temperature (Tg) of the thermoplastic resin composition is within the above range, it is convenient for injection molding. If the Tg is lower than 90°C, the use temperature range becomes narrow, which is not preferable. If the Tg exceeds 180°C, the melting temperature of the resin becomes high, which is not preferable because decomposition or coloring of the resin is likely to occur. If the glass transition temperature of the resin is too high, the difference between the mold temperature and the resin glass transition temperature becomes large in a general-purpose mold temperature regulator. Therefore, in applications where strict surface accuracy is required for the product, it is difficult to use a resin with a glass transition temperature that is too high, which is not preferable. From the viewpoints of molding flowability and molding heat resistance, the lower limit of Tg is preferably 130°C, more preferably 135°C, and the upper limit of Tg is preferably 160°C, more preferably 150°C.

[0059] (D) Other characteristics The thermoplastic resin composition of the present invention has high moist heat resistance. The moist heat resistance can be evaluated by performing a "PCT test" (pressure cooker test) on an optical molded article obtained using the thermoplastic resin composition and measuring the total light transmittance of the optical molded article after the test. The PCT test can be performed by holding an injection molded article having a diameter of 50 mm and a thickness of 3 mm under conditions of 120°C, 0.2 MPa, 100% RH, and 20 hours. The thermoplastic resin composition of the present invention has a total light transmittance of 60% or more after the PCT test, preferably 70% or more, more preferably 75% or more, even more preferably 80% or more, and particularly preferably 85% or more. If the total light transmittance is 60% or more, it can be said to have high moist heat resistance compared to conventional polycarbonate resins.

[0060] The b value of the thermoplastic resin composition of the present invention is preferably not more than 5. The smaller the b value, the weaker the yellowness and the better the hue.

[0061] The amount of residual phenol contained in the thermoplastic resin composition of the present invention is preferably 500 ppm or less, more preferably 300 ppm or less, and even more preferably 50 ppm or less.

[0062] The amount of residual diphenyl carbonate (DPC) contained in the thermoplastic resin composition of the present invention is preferably 200 ppm or less, more preferably 100 ppm or less, and even more preferably 50 ppm or less.

[0063] 4. Optical Lenses The optical lens of the present invention can be obtained by injection molding the above-mentioned thermoplastic resin composition of the present invention into a lens shape using an injection molding machine or an injection compression molding machine. In one embodiment of the present invention, the optical lens can be produced according to the method described in WO2018 / 016516. The molding conditions for injection molding are not particularly limited, but the molding temperature is preferably 180 to 300°C, more preferably 180 to 290°C. The injection pressure is preferably 50 to 1700 kg / cm. 2 It is.

[0064] In order to prevent foreign matter from being mixed into the optical lens as much as possible, the molding environment must naturally be a low-dust environment, preferably class 1000 or less, and more preferably class 100 or less.

[0065] The optical lens of the present invention is preferably used in the form of an aspherical lens as necessary. Since an aspherical lens can substantially eliminate spherical aberration with a single lens, it is not necessary to remove spherical aberration by combining a plurality of spherical lenses, and it is possible to reduce weight and production costs. Therefore, among optical lenses, the aspherical lens is particularly useful as a camera lens. The astigmatism of the aspherical lens is preferably 0 to 15 mλ, and more preferably 0 to 10 mλ.

[0066] The thickness of the optical lens of the present invention can be set in a wide range depending on the application and is not particularly limited, but is preferably 0.01 to 30 mm, more preferably 0.1 to 15 mm. A coating layer such as an antireflection layer or a hard coat layer may be provided on the surface of the optical lens of the present invention as necessary. The antireflection layer may be a single layer or a multilayer, and may be an organic or inorganic material, but is preferably an inorganic material. Specifically, examples of the antireflection layer include oxides or fluorides such as silicon oxide, aluminum oxide, zirconium oxide, titanium oxide, cerium oxide, magnesium oxide, and magnesium fluoride. Among these, silicon oxide and zirconium oxide are more preferable, and a combination of silicon oxide and zirconium oxide is even more preferable. In addition, the antireflection layer is not particularly limited with respect to the combination of single layer / multilayer, or the combination of their components and thicknesses, but is preferably a two-layer or three-layer structure, and particularly preferably a three-layer structure. The antireflection layer as a whole is preferably formed to a thickness of 0.00017 to 3.3% of the thickness of the optical lens, specifically 0.05 to 3 μm, and particularly preferably 1 to 2 μm.

[0067] In one embodiment of the present invention, the optical lens may be an infrared camera lens. In a preferred embodiment of the present invention, the optical lens is a biometric camera lens. EXAMPLES

[0068] The present invention will be described below using examples, but it is not intended that the present invention be limited to these examples.

[0069] (1) Transmittance The pellets of the thermoplastic resin composition were dried at 120°C for 5 hours in a hot air circulation dryer, and then molded into two stepped flat test pieces with a width of 40 mm, a length of 80 mm, and thicknesses of 1 mm and 2 mm using an injection molding machine (ROBOSHOT S-2000i30A manufactured by Fanuc Corporation) under the conditions of a resin temperature of 260°C, a mold temperature of 130°C, and a molding cycle of 30 seconds. In accordance with JIS K7105, the transmittance of the 1 mm-thick portion of the stepped flat test piece was measured using a spectrophotometer ("U-4100" manufactured by Hitachi High-Technologies Corporation). The maximum value of the transmittance at wavelengths of 380 nm to 630 nm is the maximum value among 250 data obtained by measuring the transmittance at wavelengths of 380 nm to 630 nm every 1 nm. The average transmittance at wavelengths of 840 nm to 940 nm is the average value of 100 pieces of data obtained by measuring the transmittance at intervals of 1 nm at wavelengths of 840 nm to 940 nm.

[0070] (2) Refractive index (nD) Pellets of the thermoplastic resin or thermoplastic resin composition were dried in a hot air circulation dryer at 120°C for 5 hours, and then molded into flat plate-shaped test pieces with a width of 40 mm, a length of 40 mm, and a thickness of 3 mm using an injection molding machine (ROBOSHOT S-2000i30A manufactured by Fanuc Corporation) under conditions of a resin temperature of 260°C, a mold temperature of 130°C, and a molding cycle of 30 seconds. The refractive index was measured using a V-block refractometer ("PR-2" manufactured by Carl Zeiss Jena AG) in accordance with JIS B7071-2.

[0071] (3) Abbe number (ν) The Abbe number (ν) of the thermoplastic resin is preferably 24 or less, more preferably 22 or less, and even more preferably 20 or less. The Abbe number can be calculated using the following formula from the refractive indexes at wavelengths of 486 nm, 589 nm, and 656 nm at 23° C. The refractive indexes at wavelengths of 486 nm, 589 nm, and 656 nm can be measured for a 0.1 mm thick film using an Abbe refractometer according to the method of JIS-K-7142. ν=(nD-1) / (nF-nC) nD: Refractive index at a wavelength of 589 nm nC: Refractive index at a wavelength of 656 nm nF: Refractive index at a wavelength of 486 nm

[0072] (4) Polystyrene equivalent weight average molecular weight (Mw) A calibration curve was prepared by gel permeation chromatography (GPC) using tetrahydrofuran as a developing solvent and standard polystyrene of known molecular weight (molecular weight distribution = 1). Based on this calibration curve, Mw was calculated from the GPC retention time.

[0073] (5) Glass transition temperature (Tg) The measurements were performed using a differential scanning calorimeter (DSC) based on JIS K7121-1987. The DSC analyzer used was a Hitachi High-Tech Science X-DSC7000. The heating rate was 10°C per minute.

[0074] (6) Total light transmittance A 3 mm thick plate made of a thermoplastic resin prepared for measuring the b value described below was measured using a Nippon Denshoku Industries Co., Ltd. SE2000 spectrophotometer according to the method of JIS-K-7361-1.

[0075] (7) b value The produced resin was vacuum dried at 120°C for 4 hours, and then injection molded using an injection molding machine (FANUC ROBOSHOT α-S30iA) at a cylinder temperature of 270°C and a mold temperature of Tg-10°C to obtain a disk-shaped test plate piece with a diameter of 50 mm and a thickness of 3 mm. Using this plate piece, the b value was measured in accordance with JIS K7105. The smaller the b value, the less yellow it is, and the better the hue. A spectrophotometer SE2000 manufactured by Nippon Denshoku Kogyo Co., Ltd. was used to measure the molded plate.

[0076] (8) Residual phenol and diphenyl carbonate (DPC) content 1.0 g of the weighed polycarbonate resin was precisely weighed, dissolved in 10 ml of dichloromethane, and slowly added to 100 ml of methanol while stirring to reprecipitate the resin. After thorough stirring, the precipitate was filtered off, and the filtrate was concentrated using an evaporator to obtain a solid. 1.0 g of the standard solution was precisely weighed and added to the solid. The solution was diluted with 1 g of chloroform and quantified by GC-MS. Standard solution: 200 ppm, 2,4,6-trimethylphenol in chloroform Measuring device (GC-MS): Agilent HP6890 / 5973MSD Column: Capillary column DB-5MS, 30m x 0.25mm ID, film thickness 0.5μm Heating conditions: 50℃ (5min hold) to 300℃ (15min hold), 10℃ / min Injection port temperature: 300°C, injection volume: 1.0 μl (split ratio 25) Ionization method: EI method Carrier gas: He, 1.0 ml / min Aux temperature: 300℃ Mass scan range: 33-700

[0077] (9) Remaining BHEBN and BPPEF Amounts 0.5 g of the weighed polycarbonate resin was dissolved in 50 ml of tetrahydrofuran (THF) to prepare a sample solution. A calibration curve was prepared from the pure products of each compound as a standard, and 2 μL of the sample solution was quantified by LC-MS under the following measurement conditions. The detection limit under these measurement conditions is 0.01 ppm. Other residual monomers besides the amount of residual BHEBN and the amount of residual BPPEF can also be measured in the same manner. LC-MS measurement conditions: Measuring device (LC part): Agilent Infinity 1260 LC System Column: ZORBAX Eclipse XDB-18 and guard cartridge Mobile phase: A: 0.01mol / L-ammonium acetate solution B: 0.01 mol / L ammonium acetate in methanol C:THF Mobile phase gradient program: [Table 1] Flow rate: 0.3ml / min Column temperature: 45℃ Detector: UV (225 nm) Measurement device (MS part): Agilent 6120 single quad LCMS System Ionization source: ESI Polarity: Positive Fragmenter: 100V Dry gas: 10L / min, 350℃ Nebulizer: 50 psi Capillary voltage: 3000V Measurement ions: BHEBN: ion species = [M+NH4]-, m / z = 392.1 BPPEF: ion species = [M+NH4]-, m / z = 608.3

[0078] <Production of Thermoplastic Resin Composition> [Manufacturing example 1] Thermoplastic resin A (high refractive index material) The raw materials were 8.0 kg (14.85 mol) of 9,9-bis[6-(2-hydroxyethoxy)naphthalene-2-yl]fluorene (also referred to as "BNEF"), 7.5 kg (20.03 mol) of 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (also referred to as "BHEBN"), 7.5 kg (12.70 mol) of 9,9-bis[4-(2-hydroxyethoxy)-3-phenylphenyl]fluorene (also referred to as "BPPEF"), 10.5 kg (49.02 mol) of diphenyl carbonate (also referred to as "DPC"), and 2.5 x 10 -2 16 ml of sodium bicarbonate solution (4.0 x 10 -4 mole, i.e., 8.4 × 10 per mole of dihydroxy compounds in total. -6mol) was placed in a 50L reactor equipped with a stirrer and a distillation device, and heated to 180°C under a nitrogen atmosphere of 760mmHg. 30 minutes after the start of heating, complete dissolution of the raw materials was confirmed, and then stirring was performed for 120 minutes under the same conditions. Then, the degree of vacuum was adjusted to 200mmHg, and the temperature was raised to 200°C at a rate of 60°C / hr. At this time, the start of distillation of by-produced phenol was confirmed. Then, the reaction was performed by holding at 200°C for 20 minutes. Furthermore, the temperature was raised to 230°C at a rate of 75°C / hr, and 10 minutes after the end of the temperature rise, the degree of vacuum was reduced to 1mmHg or less over 2 hours while maintaining the temperature. Then, the temperature was raised to 245°C at a rate of 60°C / hr, and stirring was performed for another 40 minutes. After the reaction was completed, nitrogen was introduced into the reactor to return to normal pressure, and the produced thermoplastic resin was pelletized and taken out. The resulting resin had a polystyrene-equivalent weight average molecular weight (Mw) of 32,000 and a glass transition temperature (Tg) of 142°C. [ka]

[0079] [Manufacturing example 2] Thermoplastic resin B (high refractive index material) As raw materials, 20.86 kg (47.56 mol) of 9,9-bis[4-(2-hydroxyethoxy)-phenyl]fluorene (also referred to as "BPEF"), 10.5 kg (49.02 mol) of DPC, and 2.5 × 10 -2 16 ml of sodium bicarbonate solution (4.0 x 10 -4 mole, i.e., 8.4 × 10 per mole of dihydroxy compounds in total. -6 Except for using 1,000 moles of ethylenediaminetetraacetate, a thermoplastic resin was obtained in the same manner as in Example 1. The polystyrene-equivalent weight average molecular weight (Mw) of the obtained resin was 31,000, and the glass transition temperature (Tg) was 145°C. [ka]

[0080] [Manufacturing example 3] Thermoplastic resin C (high refractive index material) As raw materials, 18.15 kg (41.39 mol) of BPEF, 1.41 kg (6.18 mol) of 2,2'-bis(4-hydroxyphenyl)propane (also referred to as "BPA"), 10.5 kg (49.02 mol) of DPC, and 2.5 x 10 -2 16 ml of sodium bicarbonate solution (4.0 x 10 -4 mole, i.e., 8.4 × 10 per mole of dihydroxy compounds in total. -6 Except for using 1,000 moles of ethylenediaminetetraacetate, a thermoplastic resin was obtained in the same manner as in Example 1. The polystyrene-equivalent weight average molecular weight (Mw) of the obtained resin was 31,000, and the glass transition temperature (Tg) was 145°C. [ka]

[0081] [Manufacturing example 4] Thermoplastic resin E (high refractive index material) As raw materials, 4.53 kg (12.1 mol) of BHEBN, 8.72 kg (14.8 mol) of BPPEF, 5.99 kg (27.9 mol) of DPC, and 2.5 × 10 -2 16 ml of sodium bicarbonate solution (4.0 x 10 -4 mole, i.e., 8.4 × 10 per mole of dihydroxy compounds in total. -6 Except for using 1,000 moles of ethylenediaminetetraacetate, a thermoplastic resin was obtained in the same manner as in Example 1. The polystyrene-equivalent weight average molecular weight (Mw) of the obtained resin was 32,000, and the glass transition temperature (Tg) was 140°C. [ka]

[0082] Thermoplastic resin D (general thermoplastic resin) As the thermoplastic resin D, Iupilon S-3000 (a homopolymer resin of BPA) manufactured by Mitsubishi Engineering Plastics Corporation was used.

[0083] <Production of Thermoplastic Resin Composition> [Examples 1 to 8] The thermoplastic resin, green pigment, red pigment, yellow pigment, and purple pigment were blended in the proportions (parts by mass) shown in Table 2, mixed in a tumbler for 20 minutes, and then melt-kneaded at a cylinder temperature of 260°C in a twin-screw extruder (TEX30α manufactured by Japan Steel Works, Ltd.), and pellets of the thermoplastic resin composition were obtained by strand cutting.

[0084] [Comparative Example 1] A thermoplastic resin composition using a highly refractive thermoplastic resin A as the thermoplastic resin and not containing a coloring material was used as Comparative Example 1 (Table 2).

[0085] [Comparative Example 2] Comparative Example 2 was a thermoplastic resin composition using thermoplastic resin A, which is a high refractive index material, as the thermoplastic resin and containing carbon black as the color material (Table 2).

[0086] [Comparative Example 3] Comparative Example 3 was a thermoplastic resin composition containing a green pigment, a red pigment, a yellow pigment, and a purple pigment, using a general thermoplastic resin, Thermoplastic Resin D, as the thermoplastic resin (Table 2).

[0087] For the thermoplastic resin compositions obtained in Examples 1 to 8 and Comparative Examples 1 to 3, the refractive index at a wavelength of 894 nm, the maximum transmittance (unit: %) at wavelengths of 380 nm to 630 nm, the transmittance (unit: %) at a wavelength of 720 nm, the transmittance (unit: %) at a wavelength of 780 nm, and the average transmittance (unit: %) at wavelengths of 840 nm to 940 nm were measured when the thickness was 1 mm, and are shown in Table 2.

[0088] [Table 2]

[0089] As shown in Table 2, the thermoplastic resin composition of the present invention containing a high refractive index material and a coloring material can detect infrared rays and effectively block visible light. Therefore, by using the thermoplastic resin composition of the present invention in an optical lens for an infrared camera / sensor, noise derived from visible light can be reduced and image accuracy can be improved.

Claims

1. Thermoplastic resin and Colorants A thermoplastic resin composition comprising, The refractive index at a wavelength of 894 nm is 1.60 or higher. In the thermoplastic resin composition with a thickness of 1 mm, the maximum transmittance at wavelengths of 380 nm to 630 nm is greater than 0% and 1.00% or less, and the average transmittance at wavelengths of 840 nm to 940 nm is 80% or more. The Tg is between 90 and 180°C. Thermoplastic resin composition.

2. In the thermoplastic resin composition with a thickness of 1 mm, The transmittance at a wavelength of 720 nm is 50% or less. The transmittance at a wavelength of 780 nm is 50% or more. The thermoplastic resin composition according to claim 1.

3. The thermoplastic resin composition according to claim 1 or 2, wherein the thermoplastic resin is a polyester resin.

4. The thermoplastic resin composition according to any one of claims 1 to 3, wherein the thermoplastic resin comprises, as a monomer, a compound selected from the group consisting of compounds represented by the following general formulas (I), (II), (III), and (V). 【Chemistry 1】 (In general formula (I), R1 to R4 each independently represent a C6-20 aryl group, a C2-6 alkenyl group, a C1-6 alkoxy group, or a C7-17 aralkyl group, which may contain a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a C1-C6 alkyl group, or a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom. p, q, r, and s each independently represent integers from 0 to 4. R is, 【Chemistry 2】 And, Here, i represents an integer from 0 to 10, ii represents an integer from 1 to 10, and iii represents an integer from 1 to 10. 【Transformation 3】 (In general formula (II), R6 and R7 are synonymous with R1 to R4. n and m represent integers from 0 to 5. Y represents an alkylene group with 1 to 5 carbon atoms. n1 and n2 each independently represent integers between 0 and 10. 【Chemistry 4】 (In general formula (III), R8 and R9 are synonymous with R1 to R4. a and b represent integers from 0 to 4. Y represents an alkylene group with 1 to 5 carbon atoms. n1 and n2 each independently represent integers between 0 and 10. 【Transformation 5】 (In general formula (V), R1 and R2 each independently represent a C6-C20 aryl group, a C2-C6 alkenyl group, a C1-C6 alkoxy group, or a C7-C17 aralkyl group, which may contain a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a C1-C6 alkyl group, or a heterocyclic atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom. a and b represent integers between 0 and 4.

5. The thermoplastic resin composition according to any one of claims 1 to 4, wherein the colorant comprises at least one of a green pigment, a red pigment, a yellow pigment, and a purple pigment.

6. The thermoplastic resin composition according to any one of claims 1 to 4, wherein the colorant comprises at least one of anthraquinone pigments, perinone pigments, methine pigments, isoindoline pigments, phthalocyanine pigments, quinacridone pigments, azo pigments, and lake pigments.

7. The thermoplastic resin composition according to any one of claims 1 to 6, wherein, when the thickness is 1 mm, the maximum value of the transmittance at wavelengths of 380 nm to 630 nm is greater than 0% and 0.8% or less.

8. The thermoplastic resin composition according to any one of claims 1 to 7, wherein, when the thickness is 1 mm, the maximum value of the transmittance at wavelengths of 380 nm to 630 nm is greater than 0% and 0.5% or less.

9. An optical lens comprising the thermoplastic resin composition according to any one of claims 1 to 8.

10. A lens for an infrared camera comprising the thermoplastic resin composition according to any one of claims 1 to 8.

11. A lens for a biometric camera comprising the thermoplastic resin composition according to any one of claims 1 to 8.

Images