Resin composition, method of manufacturing the same, use the same, method of manufacturing a molded article, and method of manufacturing an imaging element

Abstract

The present invention aims to provide a resin composition comprising a melt mixture of a near-infrared absorbing pigment and a resin, which can produce a molded article having good optical properties even when used in melt molding. The present invention is a resin composition comprising a melt mixture of a cyanine pigment and / or a squaryllium pigment and a resin, wherein the cyanine pigment is a compound comprising a cation formed of a cyanine structure and an anion formed of tetrakispentafluorophenylborate, wherein the cation formed of the cyanine structure has a specific structure or a specific structure at at least one end of a polymethine backbone, and the squaryllium pigment is a compound having at least one structure added to the squaric acid portion that includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one structure added to the squaric acid portion that includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one carbon in the conjugated system.

Description

Technology Field

[0001] The present invention relates to a resin composition. More specifically, it relates to a resin composition capable of obtaining a molded article having good optical properties even when melt-molded, a method for manufacturing the same, an use thereof, a method for manufacturing a molded article, and a method for manufacturing an imaging element. Background Technology

[0002] Recently, various applications have been proposed for materials that selectively transmit or cut light in specific wavelength ranges, such as near-infrared rays (700 nm to 1150 nm). Examples of such applications include near-infrared cut filters used in solid-state imaging devices, eyeglasses, sunglasses, and optical filters for semiconductor light-receiving devices.

[0003] Resin compositions containing near-infrared absorbing pigments and resins are used as such materials, and various studies have been conducted on said resin compositions to meet the requirements of various applications (e.g., Patent Documents 1 and 2). Prior art literature

[0004] Patent Document 1: Japanese Published Patent No. 2015-172102 Patent Document 2: Japanese Published Patent No. 2021-102756 The problem to be solved

[0005] However, the heat resistance of conventionally used resin compositions is not yet sufficient. Consequently, while a molded body with good optical properties can be obtained when a resin composition containing a near-infrared absorbing pigment is applied to a substrate and dried to form a film for coating purposes, there was a problem in that when the resin composition is melt-molded, the near-infrared absorbing pigment deteriorates because it cannot withstand the melting temperature, making it impossible to obtain a molded body with good optical properties. In particular, there was a need for a molten mixture of pigment and resin that can suitably manufacture a molded body with good optical properties without the pigment deteriorating during injection molding, such as lens molding, or extrusion molding, such as film molding or sheet molding.

[0006] The present invention is made in consideration of the above phenomenon and aims to provide a resin composition that is a molten mixture comprising a resin and a near-infrared absorbing pigment (cyanine pigment and / or squaryllium pigment), which can produce a molded article having good optical properties even when used in melt molding. means of solving the problem

[0007] In order to solve the above problem, the inventors have examined various resin compositions including near-infrared absorbing pigments and resins, and have discovered that by including a specific near-infrared absorbing pigment (cyanine pigment and / or squaryllium pigment) and a resin, a resin composition capable of realizing good optical properties even as a molten mixture can be obtained, thereby completing the present invention.

[0008] That is, the present invention includes the following forms.

[0009] <1> A molten mixture comprising a cyanine pigment and / or a squaryllium pigment and a resin, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1):

[0010] [Chemical Formula 1]

[0011]

[0012] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2) at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different.

[0013] [Chemical Formula 2]

[0014]

[0015] (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A resin composition characterized by having a structure represented by (* indicates a bonding site with a polymethine backbone), wherein the squaryllium pigment is a compound in which at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon.

[0016] <2> The above <1> A molded article characterized by being formed using the resin composition described in ).

[0017] <3> The above <1> An injection molded article characterized by being made using the resin composition described in

[0018] <4> The above <1> An extruded article characterized by being formed using the resin composition described in

[0019] <5> The above <1> An optical lens characterized by being made using the resin composition described in

[0020] <6> The above <1> An optical filter characterized by comprising a sheet formed using the resin composition described in

[0021] <7> The above <5> The optical lens described in and / or the above <6> An imaging element characterized by having an optical filter as described in

[0022] <8> A method for manufacturing a resin composition comprises a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1):

[0023] [Chemical Formula 3]

[0024]

[0025] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2) at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different.

[0026] [Chemical Formula 4]

[0027]

[0028] (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for preparing a resin composition characterized by having a structure represented by (* indicates a bonding site with a polymethine backbone), wherein the squaryllium pigment has a structure in which at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon.

[0029] <9> A method for manufacturing a molded body comprises a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, and a process of melt-molding the melt mixture, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1):

[0030] [Chemical Formula 5]

[0031]

[0032] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2) at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different.

[0033] [Chemical Formula 6]

[0034]

[0035] (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27A method for manufacturing a molded body characterized by having a structure represented by (* indicates a bonding site with a polymethine backbone), wherein the squaryllium pigment has a structure in which at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon.

[0036] <10> The above melt molding is characterized as being injection molding or extrusion molding. <9> Method for manufacturing a molded body as described in

[0037] <11> The above molded body is characterized as being a pellet, lens, or sheet. <9> or <10> Method for manufacturing a molded body as described in

[0038] <12> The above molded body is characterized as being an optical lens. <9> or <10> Method for manufacturing a molded body as described in

[0039] <13> The above molded body is characterized as being an optical filter. <9> or <10> Method for manufacturing a molded body as described in

[0040] <14> A method for manufacturing an imaging element having an optical lens group and a light-receiving element, comprising a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, and a process of melt-molding the melt mixture to manufacture at least one optical lens constituting the optical lens group, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1):

[0041] [Chemical Formula 7]

[0042]

[0043] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2) at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different.

[0044] [Chemical Formula 8]

[0045]

[0046] (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27A method for manufacturing an imaging element, characterized in that the squarylium pigment has a structure represented by (* indicates a binding site with a polymethine backbone), wherein at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon.

[0047] <15> A method for manufacturing an imaging element comprising an optical lens group, an optical filter, and a light-receiving element, comprising a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, and a process of melt-molding the melt mixture to manufacture at least one optical lens and / or optical filter constituting the optical lens group, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1):

[0048] [Chemical Formula 9]

[0049]

[0050] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2) at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different.

[0051] [Chemical Formula 10]

[0052]

[0053] (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for manufacturing an imaging element, characterized in that the squarylium pigment has a structure represented by (* indicates a binding site with a polymethine backbone), wherein at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon. Effects of the invention

[0054] The resin composition of the present invention can yield a molded article having good optical properties even when used in melt molding. Brief explanation of the drawing

[0055] [Fig. 1] This is a diagram showing the absorbance curve of the molded body of Example 1. [Fig. 2] This is a diagram showing the absorbance curve of the molded body of Comparative Example 1. Specific details for implementing the invention

[0056] The present invention is described in detail below.

[0057] In addition, a combination of two or more individual preferred forms of the present invention described below is also a preferred form of the present invention.

[0058] 1. Resin composition

[0059] The present invention is a resin composition comprising a cyanine pigment and / or a squaryllium pigment and a resin, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, the cation having a cyanine structure has a structure represented by formula (1) or a structure represented by formula (2) at at least one end of a polymethine backbone, and the squaryllium pigment is a compound having at least one of the structures added to the squaric acid portion having a structure comprising a nitrogen-containing conjugated system consisting of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion having a structure comprising a nitrogen-containing conjugated system consisting of a 5-membered ring and a 6-membered ring through one conjugated carbon.

[0060] The resin composition of the present invention, by including a specific pigment and a resin as described above, can obtain a molded article having good optical properties even when melt-molded. It is presumed that the reason for obtaining this effect is that the main framework of the specific pigment included in the resin composition of the present invention is rigid and the bonding force between the cationic species and the anionic species is strong, making it difficult to be released even when heated at high temperatures.

[0061] The resin composition of the present invention is a molten mixture comprising a cyanine pigment and / or a squaryllium pigment and a resin. In the present invention, a molten mixture is a mixture of a cyanine pigment and / or a squaryllium pigment and a resin that is heated to a temperature above the melting point of the resin and melted and mixed so that each component becomes uniform.

[0062] The above melt mixing means mixing at a temperature above the melting point when the resin included in the resin composition of the present invention is a thermoplastic resin having a melting point in differential scanning calorimetry (DSC) measurement, and mixing at a temperature 80°C or higher than the glass transition temperature in DSC measurement when the resin is a thermoplastic resin not having a melting point in DSC measurement.

[0063] In addition, DSC measurements are performed according to the method in accordance with JIS K 7121:2012.

[0064] From the perspective of the use of the resin composition of the present invention, when the resin included in the resin composition of the present invention is a thermoplastic resin having the above melting point, it is preferable that the melting point is 200°C or higher and 260°C or lower, and more preferable that it is 220°C or higher and 255°C or lower. When the resin is a thermoplastic resin not having the above melting point, it is preferable that the glass transition temperature is 100°C or higher and 200°C or lower, more preferable that it is 110°C or higher and 180°C or lower, and even more preferable that it is 120°C or higher and 160°C or lower.

[0065] (Cyanin pigment)

[0066] The cyanine pigment used in the present invention is a compound comprising a cation composed of a cyanine structure and an anion composed of tetrakispentafluorophenyl borate.

[0067] The cation composed of the above cyanine structure has a structure (structure A1) represented by the above formula (1), or a structure (structure A2) represented by the above formula (2) at at least one end of the polymethine backbone.

[0068] (Structure A1)

[0069] In the above equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It may be combined to form a ring structure.

[0070] R a and R b Examples of halogen atoms represented by [this] include fluorine atoms, chlorine atoms, bromine atoms, iodine atoms, etc. Among these, fluorine atoms and chlorine atoms are preferred because the pigment is easy to obtain and absorbs little visible light, and chlorine atoms are even more preferred because they are easy to handle during synthesis.

[0071] R a and R b The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 6, in that the solubility of the pigment in the thermoplastic resin can be improved.

[0072] R a and R b As for the aliphatic hydrocarbon group represented by, an alkyl group is preferred, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a tert-butyl group is more preferred, and a methyl group is even more preferred.

[0073] R a and R bExamples of substituents that may be present on the aliphatic hydrocarbon group represented by include halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms, among which fluorine atoms and chlorine atoms are preferred, and chlorine atoms are more preferred.

[0074] R a and R b It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0075] R a and R b The ring structure formed by combining may be a single ring or a polycyclic ring. The ring structure may be a ring, an aromatic ring, or a condensed ring thereof. The ring structure is preferably a 5 to 18-membered ring, more preferably a 5 to 12-membered ring, and even more preferably a 5 to 6-membered ring.

[0076] Among them, X 1 and X 2 is the same or different in that it has higher heat resistance, oxygen atoms, sulfur atoms, or -CR a R b -(R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is desirable that at least one of them represents an aliphatic hydrocarbon group.)

[0077] Above -CR a R b -in, R a and R b It is preferable that all of them be aliphatic hydrocarbon groups that may have substituents, and it is more preferable that they be aliphatic hydrocarbon groups.

[0078] The above X 1 and X 2 It is more desirable for it to be the same.

[0079] In the above equation (1), Y is Y 1 or Y 2 It is a mechanism represented by . Y 1 and Y 2 In the expressions represented by *, * indicates the binding site with the polymethine backbone. Y 1 and Y 2 Among them, carbon atoms at the locations where the line segments marked with * at the ends are bonded are bonded to the polymethine backbone. Therefore, it is preferable that the structure represented by the above formula (1) is specifically the structure shown in the following formula (1a) or (1b).

[0080] [Chemical Formula 11]

[0081]

[0082] (during food, R 1 ~ R 12 is the same as Equation (1).

[0083] In the above equation (1), X at a point of high heat resistance 1 and X 2 is an oxygen atom or a sulfur atom, and also Y is Y 2 It is desirable that the structure represented by the above formula (1) is represented by the above formula (1b), and among the above formula (1b), X 1 and X 2 It is preferable that it be an oxygen atom or a sulfur atom.

[0084] Among the above formula (1), R 1 and R 6 It represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents, whether identical or different.

[0085] R 1 and R 6 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 4.

[0086] R 1 and R 6As for the aliphatic hydrocarbon group represented by, it is preferable that it be an alkyl group, and more preferable that it be a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferable that it be a methyl group.

[0087] R 1 and R 6 Examples of substituents that may be present on the aliphatic hydrocarbon group represented by include halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms, among which fluorine atoms and chlorine atoms are preferred, and chlorine atoms are more preferred.

[0088] R 1 and R 6 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0089] Among them, R 1 and R 6 It is preferable that the aliphatic hydrocarbon groups be identical or different, and all have substituents, and it is more preferable that they be aliphatic hydrocarbon groups.

[0090] R 1 and R 6 It is desirable that it be the same.

[0091] Among the above formula (1), R 2 ~ R 5 and R 7 ~ R 10 It represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, whether identical or different.

[0092] R 2 ~ R 5 and R 7 ~ R 10 The halogen atom represented by is the aforementioned R a Examples include halogen atoms represented by []. Among these, chlorine atoms are preferred due to their higher heat resistance.

[0093] R 2 ~ R 5and R 7 ~ R 10 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 4.

[0094] Also, R 2 ~ R 5 and R 7 ~ R 10 The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0095] R 2 ~ R 5 and R 7 ~ R 10 Examples of substituents that may be present on the aliphatic hydrocarbon group represented by include halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms, among which fluorine atoms and chlorine atoms are preferred, and chlorine atoms are more preferred.

[0096] R 2 ~ R 5 and R 7 ~ R 10 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0097] Among them, R 2 ~ R 5 and R 7 ~ R 10 It is preferable that it be an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent, and it is more preferable that it be a hydrogen atom or an aliphatic hydrocarbon group.

[0098] R 2 ~ R 5 It is preferable that zero or one of them be an aliphatic hydrocarbon group having a substituent, and the remainder be hydrogen atoms.

[0099] R7 ~ R 10 It is preferable that zero or one of them be an aliphatic hydrocarbon group having a substituent, and the remainder be hydrogen atoms.

[0100] Among the above formula (1), R 2 and R 7 , R 3 and R 8 , R 4 and R 9 , R 5 and R 10 It is desirable for each of these to be the same.

[0101] Among the above formula (1), R 11 and R 12 represents an aliphatic hydrocarbon group that may have a hydrogen atom, a halogen atom, or a substituent, and may be identical or different. R 11 and R 12 The halogen atom represented by , and the aliphatic hydrocarbon group that may have substituents are each R 2 Examples include halogen atoms represented by , and aliphatic hydrocarbon groups that may have substituents. Among these, R 11 and R 12 is the same or different, preferably a halogen atom, and more preferably a chlorine atom. In addition, R 11 and R 12 It is desirable that it be the same.

[0102] (Structure A2)

[0103] Among the above formula (2), R 21 It represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents.

[0104] R 21 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 6.

[0105] R 21The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0106] R 21 As substituents that may be present on the aliphatic hydrocarbon group represented by, halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms are preferably listed. Among these, fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable.

[0107] R 21 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0108] Among them, R 21 It is preferable that the aliphatic hydrocarbon group may have a substituent, and it is more preferable that the aliphatic hydrocarbon group be an aliphatic hydrocarbon group.

[0109] Among the above formula (2), R 22 ~ R 27 It represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, whether identical or different.

[0110] R 22 ~ R 27 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 4.

[0111] R 22 ~ R 27 The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0112] R 22 ~ R 27As substituents that may be present on the aliphatic hydrocarbon group represented by, for example, halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms are preferably, among which fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable.

[0113] R 22 ~ R 27 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0114] Among them, R 22 ~ R 27 It is preferable that it be an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent, and it is more preferable that it be a hydrogen atom or an aliphatic hydrocarbon group.

[0115] R 22 ~ R 27 It is preferable that 0 or 1 of them are aliphatic hydrocarbon groups and the rest are hydrogen atoms.

[0116] In the above formula (2), * indicates a bonding site with the polymethine backbone. That is, the carbon atom at the location where the line segment with * at the end in the above formula (2) is bonded is bonded to the polymethine backbone ([-CH=CH-CH2-]n). The above structure A2 may have the above formula (2) at at least one end of the polymethine backbone, but it is preferable to have the structure represented by the above formula (2) at both ends of the polymethine backbone.

[0117] As for the cation having a structure A2 represented by the above formula (2) at at least one end of the above polymethine backbone, it is preferable to use an example represented by the following formula (2a).

[0118] [Chemical Formula 12]

[0119]

[0120] (during food, R 21 ~ R 27is identical or different and is identical to the above. R a1 is R 21 Same as, and R a2 ~ R a7 is the same or different and R 22 ~ R 27 It is the same as.)

[0121] The above cyanine pigment can be synthesized by general organic synthesis methods, such as conventionally known methods for synthesizing cyanine pigments. Preferably, it can be confirmed and obtained by achieving a purity of 99% or higher after column purification and then confirming the molecular structure using NMR. Alternatively, commercially available products may be used.

[0122] (Squaryllium pigment)

[0123] The squaryllium pigment used in the present invention is a compound having a structure in which at least one of the structures added to the squaric acid portion has a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or in which at least one of the structures added to the squaric acid portion has a structure in which a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one carbon of the conjugated system.

[0124] Squaryllium pigment is a compound represented by the following formula (3), and the squaric acid portion is the portion that appears inside [ ] in the formula represented by the following formula (3).

[0125] [Chemical Formula 13]

[0126]

[0127] In equation (3), R 31 and R 32 is identical or different and represents an organic group, corresponding to a structural portion added to the squaric acid portion. R 31 and R 32At least one of them is a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring (hereinafter also referred to as “Structure B1”), or a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon (hereinafter also referred to as “Structure B2”).

[0128] (Structure B1)

[0129] In a structure including a nitrogen-containing conjugate system composed of the above-mentioned five-membered ring and six-membered ring, the nitrogen atom may be contained in the five-membered ring, may be contained in the six-membered ring, or may be contained in both the five-membered ring and the six-membered ring, but it is preferable for it to be contained in the five-membered ring.

[0130] The number of five-membered and six-membered rings constituting the nitrogen-containing conjugate system is not particularly limited, but it is preferable that the nitrogen-containing conjugate system consists of one five-membered ring and one six-membered ring. Examples of the nitrogen-containing conjugate system include Form 1, which consists of a six-membered ring and a five-membered ring in order with respect to the squaric acid portion, and Form 2, which consists of a five-membered ring and a six-membered ring in order.

[0131] Examples of nitrogen-containing conjugated systems composed of the above-mentioned five-membered and six-membered rings include structures in which one hydrogen atom is excluded and the rest is monovalent, such as indole, indoline, indolizine, isoindole, indazole, imidazole, benzimidazole, benzotriazole, and their derivatives.

[0132] Among them, as a nitrogen-containing conjugate system composed of the above-mentioned 5-membered ring and 6-membered ring, a structure represented by the following formula (3a), a structure represented by the following formula (3b), and a structure represented by the following formula (3c) are preferred, and a structure represented by the following formula (3a) is more preferred.

[0133] [Chemical Formula 14]

[0134]

[0135] (In Equation (3a), R a1 ~ R a6is identical or different, and may have a hydrogen atom, an aliphatic hydrocarbon group with a substituent, or -NH-CO-R a7 Represents the energy indicated by . R a7 represents an aliphatic hydrocarbon group that may have a substituent. * indicates the binding site with the squaric acid site.)

[0136] [Chemical Formula 15]

[0137]

[0138] (In Equation (3b), R b1 ~ R b6 represents an aliphatic hydrocarbon group that may be identical or different and may have a hydrogen atom or a substituent. n represents 0 or 1. * represents the binding site with the squaric acid site.)

[0139] [Chemical Formula 16]

[0140]

[0141] (In Equation (3c), R c1 ~ R c5 is identical or different, and may have a hydrogen atom, an aliphatic hydrocarbon group with a substituent, or -NR c6 R c7 Represents the energy indicated by . R c6 and R c7 represents an aliphatic hydrocarbon group that may have the same or different substituents. * indicates the binding site with the squaric acid group.)

[0142] Among the above formula (3a), R a1 ~ R a6 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 4.

[0143] R a1 ~ R a6The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0144] R a1 ~ R a6 As substituents that may be present on the aliphatic hydrocarbon group represented by, for example, halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms are preferably, among which fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable.

[0145] R a1 ~ R a6 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0146] R a7 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, and more preferably 1 to 8.

[0147] R a7 The aliphatic hydrocarbon group represented by is preferably an alkyl group.

[0148] R a7 The aliphatic hydrocarbon group represented by as a substituent that may have is the aforementioned R a1 ~ R a6 Examples include substituents that the aliphatic hydrocarbon group represented by may have. Among these, fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable. R a7 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0149] Among them, R a1 ~ R a6It is preferable that it be an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent, more preferable that it be a hydrogen atom or an aliphatic hydrocarbon group, and even more preferable that it be a hydrogen atom or an alkyl group.

[0150] Also, R a1 ~ R a3 is the same or different and is an alkyl group, and R a4 and R a6 is the same or different, is a hydrogen atom or an alkyl group, and R a5 Is -NH-CO-R a7 It is particularly desirable that the cause be indicated by .

[0151] The bonds indicated by dotted and solid lines in the above formula (3a) include cases where they are single bonds and cases where they are double bonds. When the structure represented by the above formula (3a) binds to the squaric acid site represented by formula (3), the positions of the single bond and double bond may change due to resonance.

[0152] The same applies to the combinations indicated by dotted and solid lines in the above formulas (3b) and (3c).

[0153] The structure represented by the above formula (3a) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (3a-1) and the structure represented by the formula (3a-2).

[0154] [Chemical Formula 17]

[0155]

[0156] (R in Equation (3a-1)) a1 ~ R a6 is R of Equation (3a) a1 ~ R a6 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0157] [Chemical Formula 18]

[0158]

[0159] (R in Equation (3a-2)) a1 ~ R a6 is R of Equation (3a) a1 ~ R a6 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0160] Among the above formula (3b), R b1 ~ R b6 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 4.

[0161] R b1 ~ R b6 The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0162] R b1 ~ R b6 As substituents that may be present on the aliphatic hydrocarbon group represented by, for example, halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms are preferably, among which fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable.

[0163] R b1 ~ R b6 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0164] Among them, R b1 ~ R b6 It is preferable that it be an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent, more preferable that it be a hydrogen atom or an aliphatic hydrocarbon group, and even more preferable that it be a hydrogen atom or an alkyl group.

[0165] The structure represented by the above formula (3b) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (3b-1) and the structure represented by the formula (3b-2).

[0166] [Chemical Formula 19]

[0167]

[0168] (R in Equation (3b-1)) b1 ~ R b5 is R of equation (3b) b1 ~ R b5 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0169] [Chemical Formula 20]

[0170]

[0171] (R in Equation (3b-2)) b1 ~ R b6 is R of equation (3b) b1 ~ R b6 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0172] Among the above formula (3c), R c1 ~ R c5 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 12, and even more preferably 1 to 8.

[0173] R c1 ~ R c5 The aliphatic hydrocarbon group represented by is preferably an alkyl group, more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group, and even more preferably a methyl group.

[0174] R c1 ~ R c5As substituents that may be present on the aliphatic hydrocarbon group represented by, for example, halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms are preferably, among which fluorine atoms and chlorine atoms are more preferable, and chlorine atoms are even more preferable.

[0175] R c1 ~ R c5 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0176] R c5 It is preferable that it be a hydrogen atom.

[0177] R c6 and R c7 It represents an aliphatic hydrocarbon group that is identical or different and may have substituents.

[0178] R c6 and R c7 The number of carbon atoms of the aliphatic hydrocarbon group represented by is preferably 1 to 18, more preferably 1 to 16, and even more preferably 1 to 12.

[0179] R c6 and R c7 The aliphatic hydrocarbon group represented by is preferably an alkyl group, and more preferably a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, or tert-butyl group.

[0180] R c6 and R c7 The aliphatic hydrocarbon group represented by as a substituent that may have is the aforementioned R c1 ~ R c5 Examples include substituents that can be possessed by the aliphatic hydrocarbon group represented by .

[0181] R c6 and R c7 It is preferable that the aliphatic hydrocarbon group represented by does not have a substituent.

[0182] The structure represented by the above formula (3c) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (3c-1) and the structure represented by the formula (3c-2).

[0183] [Chemical Formula 21]

[0184]

[0185] (R in Equation (3c-1)) c1 ~ R c5 is R of Equation (3c) c1 ~ R c5 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0186] [Chemical Formula 22]

[0187]

[0188] (R in Equation (3c-2)) c1 ~ R c5 is R of Equation (3c) c1 ~ R c5 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0189] As a squarylium pigment having the above structure B1, R in the above formula (3) 31 and R 32 A compound having a structure represented by formula (3a), (3b), or (3c) is preferred, wherein the organic group represented by is the same or different, and R in formula (3) 31 and R 32 A compound having a structure represented by the above formula (3a) is more preferable for organic groups represented by the above formula.

[0190] (Structure B2)

[0191] The above structure B2 includes a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon. That is, it is a structure in which a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring is bonded to the squaric acid site through one conjugate carbon.

[0192] "Through one conjugate carbon" means a state in which one conjugate carbon, i.e. -CR= or =CR-, exists between the squaric acid site and the nitrogen-containing conjugate system composed of the above-mentioned five-membered and six-membered rings.

[0193] As a nitrogen-containing conjugate system composed of the above-mentioned five-membered and six-membered rings, a structure identical to the above-described structure B1 can be cited. That is, as a nitrogen-containing conjugate system composed of the above-mentioned five-membered and six-membered rings, for example, a structure in which one hydrogen atom is excluded and the rest is monovalent in indole, indoline, indolizine, isoindole, indazole, imidazole, benzimidazole, benzotriazole and their derivatives can be cited.

[0194] As a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one of the above conjugate carbons, preferably, a structure represented by the following formulas (4a), (4b), or (4c) can be cited.

[0195] [Chemical Formula 23]

[0196]

[0197] (In Equation (4a), R a1 ~ R a6 is identical or different, and may have a hydrogen atom, an aliphatic hydrocarbon group with a substituent, or -NH-CO-R a7 Represents the energy indicated by . R a7 represents an aliphatic hydrocarbon group that may have substituents. R a8 represents a hydrogen atom or a C1 to C12 alkyl group. * indicates a bonding site with the squalic acid site.)

[0198] [Chemical Formula 24]

[0199]

[0200] (In Equation (4b), R b1 ~ R b6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. Rb7 represents a hydrogen atom or an alkyl group having 1 to 16 carbon atoms. n represents 0 or 1. * represents the bonding site with the squaric acid site.)

[0201] [Chemical Formula 25]

[0202]

[0203] (In Equation (4c), R c1 ~ R c5 is identical or different, and may have a hydrogen atom, an aliphatic hydrocarbon group with a substituent, or -NR c6 R c7 Represents the energy indicated by . R c6 and R c7 represents an aliphatic hydrocarbon group that may have the same or different substituents. R c8 represents a hydrogen atom or a C1 to C12 alkyl group. * indicates a bonding site with the squalic acid site.)

[0204] R in the above formula (4a) a1 ~ R a6 As for R in the above formula (3a) a1 ~ R a6 The same can be cited for each.

[0205] R in the above formula (4a) a8 It is preferable that it be a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and more preferable that it be a hydrogen atom.

[0206] The above formula (4a) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (4a-1) and the structure represented by the formula (4a-2).

[0207] [Chemical Formula 26]

[0208]

[0209] (R in Equation (4a-1)) a1 ~ R a6 and R a8is R of Equation (4a) a1 ~ R a6 and R a8 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0210] [Chemical Formula 27]

[0211]

[0212] (R in Equation (4a-2)) a1 ~ R a6 and R a8 is R of Equation (4a) a1 ~ R a6 and R a8 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0213] R in the above equation (4b) b1 ~ R b6 As for R of equation (3b), b1 ~ R b6 The same can be cited for each.

[0214] R in the above equation (4b) b7 Examples include hydrogen atoms or alkyl groups having 1 to 16 carbon atoms, and preferably alkyl groups having 1 to 12 carbon atoms.

[0215] The above formula (4b) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (4b-1) and the structure represented by the formula (4b-2).

[0216] [Chemical Formula 28]

[0217]

[0218] (R in Equation (4b-1)) b1 ~ R b7 is R of equation (4b) b1 ~ R b7 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0219] [Chemical Formula 29]

[0220]

[0221] (R in Equation (4b-2)) b1 ~ R b5 and R b7 is R of equation (4b) b1 ~ R b5 and R b7 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0222] R in the above equation (4c) c1 ~ R c5 As for R of equation (3c), c1 ~ R c5 The same can be cited for each.

[0223] R in the above equation (4c) c8 Examples include a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, and preferably a hydrogen atom.

[0224] The above formula (4c) includes a structure in a resonance relationship, and specifically, it is preferable to include at least one of the structure represented by the following formula (4c-1) and the structure represented by the formula (4c-2).

[0225] [Chemical Formula 30]

[0226]

[0227] (R in Equation (4c-1)) c1 ~ R c5 and R c8 is R of equation (4c) c1 ~ R c5 and R c8 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0228] [Chemical Formula 31]

[0229]

[0230] (R in Equation (4c-2)) c1 ~ R c5 and R c8 is R of equation (4c) c1 ~ R c5 and Rc8 They are identical to each other. * indicates the binding site with the squaric acid site.)

[0231] As a squarylium pigment having the above structure B2, R in the above formula (3) 31 and R 32 A compound having a structure represented by the above formula (4a), (4b), or (4c) is preferred, wherein the organic group represented by is the same or different, and R in the above formula (3) 31 and R 32 A compound having a structure represented by the above formula (4b) is more preferable for organic groups represented by the above formula.

[0232] The above squarylium dye can be synthesized by general organic synthesis methods, such as conventionally known methods for squarylium dye synthesis. Preferably, it can be confirmed and obtained by achieving a purity of 99% or higher after column purification and then confirming the molecular structure using NMR. Alternatively, commercially available products may be used.

[0233] The above squarylium dye preferably has an absorption maximum wavelength in the range of 690 to 750 nm, more preferably in the range of 700 to 745 nm, and even more preferably in the range of 705 to 740 nm.

[0234] The above cyanine pigment preferably has an absorption maximum wavelength in the range of 730 to 1200 nm, more preferably in the range of 740 to 1150 nm, and even more preferably in the range of 750 to 1100 nm.

[0235] In the present invention, the cyanin pigment or squarylium pigment may include only one type or two or more types.

[0236] The content of the cyanine pigment and / or squaryllium pigment in the resin composition of the present invention is not particularly limited and can be appropriately selected according to the thickness of the molded article, etc., but it is preferable that it be 0.005 to 3 mass% of 100 mass% of the resin composition of the present invention, more preferable that it be 0.01 to 2 mass%, and even more preferable that it be 0.02 to 1.5 mass%.

[0237] (profit)

[0238] The resin included in the resin composition of the present invention is not particularly limited, but it is preferably a thermoplastic resin in that it is easy to form a melt mixture with the pigment described above.

[0239] Examples of the above thermoplastic resins include polyolefin resins, cycloolefin resins, acrylic resins, styrene resins, vinyl chloride resins, polyvinyl alcohol resins, polyester resins, polyacetal resins, polycarbonate resins, polyamide resins, polyimide resins, polysulfone resins, polyphenylene ether resins, polyphenylene sulfide resins, fluoropolymer resins, cellulose derivatives, polyurethane resins, etc. Only one of these may be used, or two or more may be used in combination. Among these, cycloolefin resins and polycarbonate resins are preferred due to their good optical properties, heat resistance, and moldability, and cycloolefin resins are more preferred.

[0240] The content of the above resin is preferably 90 to 99.9 mass% of 100 mass% of the resin composition of the present invention, more preferably 92 to 99.7 mass%, and even more preferably 94 to 99.5 mass%.

[0241] (Other ingredients)

[0242] The resin composition of the present invention may include other components, such as other near-infrared absorbing pigments or ultraviolet absorbing agents other than the pigments described above, in addition to the pigments and resins described above, to a extent that does not adversely affect the effects of the present invention.

[0243] Other near-infrared absorbing pigments mentioned above include, for example, croconium-based pigments other than those described above, cyanine pigments or squaryllium pigments, cyclic tetrapyrrole-based pigments (porphyrins, chlorines, phthalocyanines, naphthalocyanines, cholines, etc.) that may have copper (e.g., Cu(II)) or zinc (e.g., Zn(II)) as a central metal ion, pyrrolopyrrole-based pigments, azo-based pigments, quinone-based pigments, xanthen-based pigments, indoline-based pigments, arylmethane-based pigments, quartylene-based pigments, diimonium-based pigments, perylene-based pigments, quinacridone-based pigments, oxazine-based pigments, dipyromethen-based pigments, nickel complex-based pigments, copper ion-based pigments (copper phosphonicates (copper phosphates), copper phosphate ester complexes (complexes of copper phosphate monoesters, complexes of copper phosphate diesters)), dithiol metal complex-based pigments. Examples include azo dyes, polymethine dyes, phthalide dyes, quinone dyes (naphthoquinone dyes, anthraquinone dyes), indophenol dyes, pyrillium dyes, thiopyrillium dyes, croconium dyes, tetradehydropyocolin dyes, triphenylmethane dyes, aluminum dyes, and pyran dyes (pyrans, benzopyrans, cromones, coumarins, xanthenes).

[0244] Examples of the above-mentioned ultraviolet absorbers include organic types such as triazine-based, benzotriazole-based, benzophenone-based, benzoxazine-based, and ethylene compounds described in Japanese Patent Publication No. 2019-14707, as well as inorganic types (particles) such as titanium oxide, zinc oxide, and cerium oxide. Among these, the ethylene compounds described in Japanese Patent Publication No. 2019-14707 are preferred in that they allow for the correction of blue tints.

[0245] In addition to the components described above, the resin composition of the present invention may include known components included in general molding materials, such as antioxidants, antistatic agents, release agents, plasticizers, fluorescent whitening agents, and impregnating agents.

[0246] 2. Method for manufacturing a resin composition

[0247] The method for preparing the resin composition of the present invention is not particularly limited as long as it is a method that can be obtained as a molten mixture by melt-mixing the above-described components, but preferably, it is desirable to include a process of melt-mixing the resin with the above-described cyanine pigment and / or squaryllium pigment. A method for preparing a resin composition including such a process is also one of the present invention.

[0248] As for the melt mixing method, any method capable of heating and mixing the resin with the aforementioned cyanine pigment and / or squaryllium pigment is not particularly limited, and methods of mixing using known mixers such as single-screw or multi-screw extruders, blenders, mixers, kneaders, dispersers, or kneaders may be used. Among these, extrusion melt mixing is preferred in that it allows for uniform mixing of each component. Among these, it is more preferable to use a method equipped with a vacuum vent. In addition, a method of directly feeding the thermoplastic resin powder or pellets and the pigment into an injection molding machine is also preferred. It is also preferable to seal the resin supply section with carbon dioxide or nitrogen gas to prevent oxidation during melt mixing.

[0249] The heating temperature during the above melt mixing can be appropriately selected depending on the type of resin used, but in the case where the resin included in the resin composition is a thermoplastic resin having a melting point, a temperature above the melting point of the resin is preferable, for example, preferably 220 to 280°C, and more preferably 230 to 270°C. In the case where the resin included in the resin composition is a thermoplastic resin not having a melting point, the temperature is preferably 180 to 300°C, more preferably 200 to 280°C, and even more preferably 220 to 270°C. The heating temperature may be changed during heating or may be changed in multiple stages.

[0250] The method for manufacturing the resin composition described above may include processes other than the melt mixing process. For example, the resin composition of the present invention may be obtained by cooling and grinding the molten mixture after the melt mixing to form a ground material. The grinding method is not particularly limited and may be performed using known grinding or granulation methods.

[0251] In addition, after the above-mentioned melt mixture, the resin composition in the form of a pellet-shaped molten mixture may be obtained by discharging it from the end of the extruder in a strand shape (string shape), cooling the strand in a water bath, etc., and then introducing it into a cutter (pelletizer) to cut it.

[0252] 3. Molded body

[0253] A molded article made using the resin composition of the present invention is also one of the present invention. Since the molded article of the present invention is obtained using the resin composition described above, the pigment does not deteriorate during molding and has good optical properties.

[0254] The above molding methods are not particularly limited and include known methods such as injection molding, extrusion molding, blow molding, compression molding, and vacuum molding. Additionally, the desired shape may be formed using methods such as casting or coating. The molding conditions can be appropriately selected from known methods depending on the type of resin and the shape and dimensions of the molded body.

[0255] Among these, injection molding and extrusion molding are preferred due to the excellent dimensional precision of the molded body. Injection molded bodies and extrusion molded bodies formed using the above resin composition are also part of the present invention.

[0256] The shape of the above-mentioned molded body is not particularly limited and can be appropriately selected according to the purpose and use; various shapes such as lens shape, spherical shape, rod shape, plate shape, cylindrical shape, tubular shape, fiber shape, film shape, or sheet shape may be used. It is preferable that the above-mentioned molded body be a pellet, lens, or sheet.

[0257] In addition, after first preparing pellets by melting the resin composition, lenses or sheets, etc. may be molded using the said pellets. The preparation of the pellets can be performed in the same manner as the method for preparing the pellet-shaped resin composition described above.

[0258] 4. Method for manufacturing a molded body

[0259] The method for manufacturing the above-described molded body is not particularly limited, but it is preferable to include a process of melt-mixing the cyanine pigment and / or squarylium pigment with a resin and a process of melt-molding the molten mixture. The melt-mixing process and the melt-molding process may be performed continuously, separately, or simultaneously. A method for manufacturing a molded body including the process of melt-mixing the cyanine pigment and / or squarylium pigment with a resin and a process of melt-molding the molten mixture described above is also one of the present inventions.

[0260] As a process for melt-mixing the above cyanine pigment and / or squaryllium pigment and resin, the same process as the melt-mixing process in the method for manufacturing the resin composition described above may be cited.

[0261] The molding method described above may be used as a process for melt-molding the above-mentioned molten mixture. Among these, it is preferable that the melt-molding be injection molding or extrusion molding. Pellet of a resin composition may also be used as the above-mentioned molten mixture.

[0262] The temperature of the melt molding above can be appropriately set depending on the resin or pigment used, but in terms of obtaining the necessary optical properties, for thermoplastic resins having a melting point, it is preferable to have a temperature above the melting point, for example, preferably 220 to 280°C, and more preferably 230 to 270°C. In the case of thermoplastic resins not having a melting point, it is preferably 200 to 300°C, more preferably 220 to 270°C, and even more preferably 230 to 260°C.

[0263] Examples of cases where the above-described melt mixing process and melt molding process are performed simultaneously include cases where the aforementioned cyanine pigment and / or squaryllium pigment and resin are supplied to a multi-screw extruder or injection molding machine to perform extrusion molding or injection molding. When the pigment and resin are supplied to the multi-screw extruder or injection molding machine, they are heated and stirred, and then melt-mixed to be extruded or injection molded to produce a molded body. When supplying the pigment and resin to the multi-screw extruder or injection molding machine, the pigment and resin may be supplied separately, a dry blend of the pigment and resin may be supplied, or pre-made pellets containing the pigment and resin may be supplied. Such forms are also one of the embodiments of the manufacturing method of the present invention.

[0264] In addition, the method for manufacturing the above-mentioned molded body may further include a process of forming a lens or sheet using the said pellet after manufacturing a pellet by the melt mixing process and the melt molding process.

[0265] 5. Uses

[0266] As described above, the resin composition and molded article of the present invention have good optical properties even when melt-molded. Therefore, it is particularly desirable to use the resin composition and molded article of the present invention for optical applications.

[0267] Preferably, optical lenses, optical filters, etc. are used for the above optical applications. The preferred shape of the molded body of the present invention is described below.

[0268] (Optical lens)

[0269] The shape of the optical lens is not particularly limited and can be appropriately selected from known shapes such as convex, concave, or aspherical shapes depending on the purpose and application. The thickness of the optical lens can be appropriately selected from known technologies depending on the purpose and application.

[0270] The content of the cyanine pigment and / or squaryllium pigment in the optical lens may be appropriately adjusted, but is preferably 0.01 to 2 g / m² per unit area of ​​the lens surface. 2 , more preferably 0.02 to 1 g / m 2 am.

[0271] An optical lens may have an anti-reflective film on at least one surface of a lens body molded using the resin composition of the present invention described above. The anti-reflective film reflects light in the ultraviolet region and also suppresses the reflection of light in the visible light region.

[0272] The anti-reflection film is not particularly limited and may include known materials such as dielectric multilayer films and moth-eye structures, but among them, dielectric multilayer films are preferred due to their ease of handling. As for the dielectric multilayer film, a laminate in which a high refractive index material layer and a low refractive index material layer are alternately stacked may be used.

[0273] As the material for the high refractive index material layer, a material with a refractive index of 1.7 or higher may be used, and typically, a material with a refractive index of 1.7 to 2.5 is used. Examples of materials for the high refractive index material layer include oxides such as titanium oxide, zinc oxide, zirconium oxide, lanthanum oxide, yttrium oxide, indium oxide, niobium oxide, tantalum oxide, tin oxide, and bismuth oxide; nitrides such as silicon nitride; mixtures of the above oxides or nitrides, or materials doped with metals such as aluminum or copper or carbon (e.g., tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO)).

[0274] As the material of the low-refractive-index material layer, a material with a refractive index of 1.6 or less may be used, and typically, a material with a refractive index of 1.2 to 1.6 is used. Examples of the material of the low-refractive-index material layer include silicon dioxide (silica), alumina, lanthanum fluoride, magnesium fluoride, sodium aluminum hexafluoride, etc.

[0275] The stacking of each dielectric film is not particularly limited, and a low-refractive-index dielectric film and a high-refractive-index dielectric film may be alternately stacked directly on at least one surface of the optical lens by known methods such as CVD, sputtering, vacuum deposition, ion plating, and ion beam sputtering.

[0276] The total number of layers of the high refractive index material layer and the low refractive index material layer is preferably in the range of 3 to 11 layers from the perspective of balancing cost and performance, more preferably in the range of 3 to 9 layers, and even more preferably in the range of 5 to 7 layers.

[0277] The thickness of the anti-reflective film is preferably 0.05 to 1 μm, more preferably 0.08 to 0.7 μm, and even more preferably 0.1 to 0.5 μm.

[0278] An optical lens made using the resin composition described above is also one of the inventions.

[0279] (Optical filter)

[0280] Examples of optical filters include a filter in which a near-infrared absorption layer made of the resin composition described above is formed on a transparent substrate. An optical filter comprising a sheet made using such a resin composition described above is also one of the inventions.

[0281] The thickness of the above near-infrared absorption layer is not particularly limited, but it is preferably 30 to 1000 μm to prevent environmental changes such as handling or moisture absorption, more preferably 50 to 500 μm, and even more preferably 70 to 300 μm.

[0282] The above optical filter may have an anti-reflective film on at least one surface. Examples of the anti-reflective film include the same as the anti-reflective film of the optical lens described above.

[0283] The thickness of the anti-reflection film in the optical filter is not particularly limited and can be adjusted appropriately, but in terms of productivity, 0.08 to 0.7 μm is preferred, and 0.1 to 0.5 μm is more preferred.

[0284] (Image sensor)

[0285] In addition, an imaging element using the optical lens described above is also one of the preferred forms of the present invention.

[0286] An imaging element is formed by having an optical lens group and a light receiving element. The optical lens group is composed of a single or multiple lens elements, and at least one of the lens elements is an optical lens formed using the resin composition of the present invention described above.

[0287] Light-receiving elements include devices that convert received light into electrical signals, specifically such as CCD (Charge Coupled Device) image sensors and COMS (Complementary Metal-Oxide Semiconductor) image sensors.

[0288] In addition, the imaging element may additionally be equipped with an optical filter. By providing an optical filter, near-infrared light can be absorbed to adjust optical characteristics. The optical filter is not particularly limited and a known optical filter used in imaging elements may be used, but an optical filter using the resin composition of the present invention described above is preferred. An imaging element equipped with such an optical lens and / or optical filter described above is also one of the present invention.

[0289] The above-described imaging element may have other components other than those described above. Examples of other components include a cover glass. The above-described imaging element may be assembled by a known method using an optical lens group, a light-receiving element, and any other components as needed, for example, in the order of a cover glass, an optical lens group, and a light-receiving element from the light-incident side.

[0290] In addition, a method for manufacturing an imaging element having an optical lens group and a light-receiving element, comprising a process of melt-mixing a resin with the above-described cyanine pigment and / or squaryllium pigment, and a process of melt-molding the melt mixture to manufacture an optical lens, is one of the preferred embodiments of the present invention.

[0291] The optical lens manufactured by melt-molding the above-described molten mixture may be at least one optical lens constituting the optical lens group. A method for manufacturing an imaging element having the above-described optical lens group and a light-receiving element, comprising the steps of melt-mixing a resin with the above-described cyanine pigment and / or squaryllium pigment, and melt-molding the molten mixture to manufacture at least one optical lens constituting the optical lens group, is also one of the present invention.

[0292] As a process for melt-mixing the above pigment and resin, the same process as the melt-mixing process in the method for manufacturing the resin composition described above can be cited.

[0293] As a process for manufacturing an optical lens by melt-molding the above-mentioned molten mixture, the molding method described above can be cited.

[0294] The above method for manufacturing the imaging element may additionally include other known processes performed in the manufacture of conventional imaging elements.

[0295] In addition, a method for manufacturing an imaging element comprising an optical lens group, an optical filter, and a light-receiving element, comprising a process of melt-mixing a resin with the above-described cyanine pigment and / or squaryllium pigment, and a process of melt-molding the melt mixture to manufacture at least one optical lens and / or optical filter constituting the optical lens group, is also one of the present invention.

[0296] As for the process of melting and mixing the above pigment and resin and the process of manufacturing the above optical lens, the same process as the above-described process can be cited.

[0297] As a process for manufacturing an optical filter by melt molding the above-mentioned molten mixture, for example, a method of forming a near-infrared absorption layer on a transparent substrate using the above-mentioned molten mixture as described above may be cited. The formation of the above-mentioned near-infrared absorption layer is not particularly limited, but methods of forming it by extrusion molding the above-mentioned molten mixture on a transparent substrate, casting, coating, etc. may be cited.

[0298] The above optical filter may have an anti-reflective film on at least one surface. Examples of the anti-reflective film include the same as the anti-reflective film of the optical lens described above.

[0299] Examples

[0300] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples.

[0301] (Example 1)

[0302] (1) Preparation of resin composition

[0303] 0.05g of squaryllium pigment SQ1 and 500g of polycarbonate resin were placed in a 10L polyethylene bag and dry-blended to achieve a uniform consistency. The resulting mixture was fed at a rate of 1.2kg / hr to a twin-screw extruder (manufactured by Technovel Co., Ltd., KZW15TW-45MG-NH(-700)) under cylinder temperature settings C1: 220℃, C2: 240℃, C3 ~ C6: 250℃, H1·D1: 240℃, and screw speed: 150rpm. After discarding 200g as an initial discharge, a string-shaped extruder was obtained. The obtained string-shaped extruder was cut using a pelletizer (manufactured by Koki Isuzuka Co., Ltd., SCF-100) to obtain cylindrical pellets with a diameter of approximately 2mm and a length of 3mm.

[0304] (2) Manufacturing of molded body

[0305] The pellets obtained above were used to manufacture a sheet-shaped molded body with a length of 60 mm to 100 mmφ and a thickness of approximately 0.20 to 0.50 mm using a compression molding machine (manufactured by Shinto Metal Industry Co., Ltd., SFA-10). Specifically, a polyimide film was installed inside the molding machine, and approximately 3 g of a resin composition was placed flat. Then, the polyimide film was placed over the surface, and a 0.25 mm shim plate was installed to apply pressure. The pressure was applied at a molding temperature of 205°C, with a first pressure (1 MPa) for 120 seconds and a second pressure (9 MPa) for 60 seconds. Afterward, the pellets were removed from the molding machine, and the polyimide films attached to both sides were removed to obtain a molded body (press sheet).

[0306] (3) Measurement of absorbance (gravimetric absorption coefficient)

[0307] The obtained molded body (thickness 0.3 to 1 mm) was cut into a 25 mm × 45 mm rectangle, and the gravimetric absorption coefficient was obtained using the following evaluation method. The obtained results are shown in Table 1. In addition, Figure 1 shows the absorbance curve of the molded body of Example 1. The vertical axis represents absorbance (Abs), and the horizontal axis represents wavelength (nm).

[0308] <Measurement of Absorbance (Gravimetric Absorption Coefficient)>

[0309] For the obtained molded body, the absorbance at wavelengths from 300 nm to 1100 nm was measured using an ultraviolet-visible-near-infrared spectrophotometer (UV3600, manufactured by Shimadzu Corporation), and the weight absorption coefficient was calculated using the following formula based on the thickness of the measured material, the concentration of added pigment, and the specific gravity of the resin.

[0310] In addition, a clear resin molded body made of the same resin without pigment was used as a blank. Also, the thickness was measured to the nearest 0.001 using a micro gauge and rounded to the nearest whole number.

[0311] <Formula for Calculating Gravimetric Absorption Coefficient>

[0312] Gravimetric absorption coefficient ε(g)=A / M / (T / 10000)

[0313] Absorbance of λmax = A

[0314] Thickness of the measured object = T(μm)

[0315] Color addition concentration = M(g / L)

[0316] λmax (maximum absorption wavelength) is the wavelength that indicates the maximum absorbance in the range of 600 nm to 1100 nm when performing absorbance measurements with an ultraviolet-visible-near-infrared spectrophotometer.

[0317] (Examples 2 to 11)

[0318] A molded body was obtained in the same manner as in Example 1, except that the pigments shown in Table 1 were used, and the weight absorption coefficient was obtained. The obtained results are shown in Table 1.

[0319] (Example 12)

[0320] 0.05 g of squaryllium pigment SQ1 and 500 g of cycloolefin resin were placed in a 10 L polyethylene bag and dry blended to achieve a homogeneous mixture. The resulting mixture was fed at a rate of 1.2 kg / hr to a twin-screw extruder (as described above) under cylinder temperature settings C1: 200°C, C2: 220°C, C3–C6: 230°C, H1·D1: 230°C, and screw speed: 150 rpm. After discarding 200 g as an initial discharge, a string-shaped extruder was obtained. The obtained string-shaped extruder was cut using a pelletizer (as described above) to obtain cylindrical pellets with a diameter of approximately 2 mm and a length of 3 mm. Using the obtained pellets, a sheet-shaped molded body was obtained in the same manner as in Example 1, and the gravimetric absorption coefficient was calculated. The results obtained are shown in Table 1.

[0321] (Examples 13 to 26)

[0322] A molded body was obtained in the same manner as in Example 12, except that the resin and pigment shown in Table 1 were used, and the weight absorption coefficient was obtained. The obtained results are shown in Table 1.

[0323] (Example 27)

[0324] (1) Preparation of resin composition

[0325] 0.025g of squaryllium pigment SQ1 and 500g of polycarbonate resin were placed in a 10L polyethylene bag and dry-blended to ensure uniformity. The resulting mixture was fed to a twin-screw extruder (as described above) at a rate of 1.2kg / hr under cylinder temperature settings C1: 220℃, C2: 240℃, C3~C6: 250℃, H1·D1: 240℃, and screw speed: 150rpm. After discarding 200g as an initial discharge, a string-shaped extruder was obtained. The obtained string-shaped extruder was cut using a pelletizer (as described above) to obtain cylindrical pellets with a diameter of approximately 2mm and a length of 3mm.

[0326] (2) Manufacturing of molded body

[0327] Using the pellets obtained above as raw materials, a plate-shaped molded body (injection molded sheet) with dimensions of 100 mm in length, 100 mm in width, and 1 mm in thickness was manufactured using an injection molding machine (manufactured by Nissei Resin Industry Co., Ltd., NS40-5A). The conditions of the injection molding machine are as follows.

[0328] · Cylinder temperature C1: 260℃, C2 ~ C4: 260℃

[0329] · Nozzle temperature: 260℃

[0330] · Mold: Length 100mm, Width 100mm, Depth 1mm, Maintain 100℃ (Cooling) 30 seconds

[0331] The obtained molded body was cut into a 25 mm × 45 mm rectangle, and the gravimetric absorption coefficient was obtained in the same manner as in Example 1. The obtained results are shown in Table 2.

[0332] (Examples 28 ~ 48)

[0333] A molded body was obtained in the same manner as in Example 27, except that the resin and pigment shown in Table 2 were used, and the weight absorption coefficient was obtained. The obtained results are shown in Table 2.

[0334] (Comparative Examples 1 ~ 3)

[0335] A molded body was obtained in the same manner as in Example 1, except that the resin and pigment shown in Table 2 were used, and the weight absorption coefficient was obtained. In addition, regarding λmax of the comparative example, since absorption is eliminated when the molded body is formed, it was determined by measuring the absorbance of an ethanol solution containing only the pigment.

[0336] The obtained results are shown in Table 2. In addition, the absorbance curve of the molded body of Comparative Example 1 is shown in Figure 2. The vertical axis represents absorbance (Abs), and the horizontal axis represents wavelength (nm).

[0337] In addition, the resins and pigments in Tables 1 and 2 are shown below.

[0338] (profit)

[0339] · Polycarbonate Resin (PC): Fanlite (registered trademark) L1225WL (product of Teijin Corporation)

[0340] · Cycloolefin resin (COC): APEL (registered trademark) 5014CL (product of Mitsui Chemicals Co., Ltd.)

[0341] · Cycloolefin resin (COP): ZEONEX (registered trademark) K26R (Nippon Zeon Co., Ltd.)

[0342] (Color)

[0343] Some of the pigments were synthesized using general organic synthesis methods, and after column purification to a purity of over 99%, their molecular structures were confirmed using NMR.

[0344] Squaryllium dye SQ1

[0345] [Chemical Formula 32]

[0346]

[0347] Squaryllium dye SQ2

[0348] [Chemical Formula 33]

[0349]

[0350] Squaryllium dye SQ3

[0351] [Chemical Formula 34]

[0352]

[0353] Squaryllium dye SQ4

[0354] [Chemical Formula 35]

[0355]

[0356] Cyanin pigment CY1

[0357] [Chemical Formula 36]

[0358]

[0359] Cyanin pigment CY2

[0360] [Chemical Formula 37]

[0361]

[0362] Cyanin pigment CY3

[0363] [Chemical Formula 38]

[0364]

[0365] Cyanin pigment CY4

[0366] [Chemical Formula 39]

[0367]

[0368] Cyanin pigment CY5

[0369] [Chemical Formula 40]

[0370]

[0371] Cyanin pigment CY6

[0372] [Chemical Formula 41]

[0373]

[0374] Cyanin pigment CY7

[0375] [Chemical Formula 42]

[0376]

[0377] Cyanine pigment D4773 (Product of Tokyo Kasei Kogyo Co., Ltd.)

[0378] [Chemical Formula 43]

[0379]

[0380] Cyanine pigment D5013 (Product of Tokyo Kasei Kogyo Co., Ltd.)

[0381] [Chemical Formula 44]

[0382]

[0383] Cyanine pigment I1026 (Product of Tokyo Kasei Kogyo Co., Ltd.)

[0384] [Chemical Formula 45]

[0385]

[0386]

[0387]

[0388] From Tables 1 and 2, it was found that the resin composition of the example exhibited excellent heat resistance, as it showed a high weight absorption coefficient of 30 or higher when melt-mixed, an absorption maximum wavelength (λmax) of about 700 to 900 nm, and desired optical properties.

Claims

Claim 1 A molten mixture comprising a cyanine pigment and / or a squaryllium pigment and a resin, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1): [Chemical Formula 1] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2): [Chemical Formula 2], which may have hydrogen atoms, halogen atoms, or substituents, and may be identical or different from the aliphatic hydrocarbon group, or at least one end of the polymethine backbone. (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A resin composition characterized by having a structure represented by *, wherein the squaryllium pigment has a structure in which at least one of the structures added to the squaric acid portion has a structure comprising a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure comprising a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon. Claim 2 A molded article characterized by being formed using the resin composition described in claim 1. Claim 3 An injection molded article characterized by being formed using the resin composition described in claim 1. Claim 4 An extruded article characterized by being formed using the resin composition described in claim 1. Claim 5 An optical lens characterized by being formed using the resin composition described in claim 1. Claim 6 An optical filter characterized by comprising a sheet formed using the resin composition described in claim 1. Claim 7 An imaging element characterized by having the optical lens described in claim 5 and / or the optical filter described in claim 6. Claim 8 A method for manufacturing a resin composition comprises a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1): [Chemical Formula 3] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2): [Chemical Formula 4] at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different. (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for preparing a resin composition characterized by having a structure represented by (* indicates a bonding site with a polymethine backbone), wherein the squaryllium pigment has a structure in which at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon. Claim 9 A method for manufacturing a molded article comprises a process of melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin, and a process of melt-molding the melt mixture, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1): [Chemical Formula 5] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2): [Chemical Formula 6] at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different. (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for manufacturing a molded body characterized by having a structure represented by *, wherein the squaryllium pigment has a structure in which at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one conjugated carbon. Claim 10 A method for manufacturing a molded body according to claim 9, wherein the melt molding is injection molding or extrusion molding. Claim 11 A method for manufacturing a molded body according to claim 9, wherein the molded body is a pellet, a lens, or a sheet. Claim 12 A method for manufacturing a molded body according to claim 9, wherein the molded body is an optical lens. Claim 13 A method for manufacturing a molded body according to claim 9, wherein the molded body is an optical filter. Claim 14 A method for manufacturing an imaging element having an optical lens group and a light-receiving element, comprising the steps of: melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin; and melt-molding the molten mixture to manufacture at least one optical lens constituting the optical lens group, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1): [Chemical Formula 7] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2): [Chemical Formula 8] at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different. (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for manufacturing an imaging element, characterized in that the squarylium pigment has a structure represented by (* indicates a binding site with a polymethine backbone), wherein at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon. Claim 15 A method for manufacturing an imaging element comprising an optical lens group, an optical filter, and a light-receiving element, comprising the steps of: melt-mixing a cyanine pigment and / or a squaryllium pigment with a resin; and melt-molding the molten mixture to manufacture at least one optical lens and / or optical filter constituting the optical lens group, wherein the cyanine pigment is a compound comprising a cation having a cyanine structure and an anion having tetrakispentafluorophenylborate, and the cation having a cyanine structure is the following formula (1): [Chemical Formula 9] (In Equation (1), X 1 and X 2 is the same or different, sulfur atoms, oxygen atoms, or -CR a R b - indicates. R a and R b represents an aliphatic hydrocarbon group that may have hydrogen atoms, halogen atoms, or substituents, and R a and R b It is acceptable for them to combine to form a ring structure. Y is Y 1 or Y 2 Indicates the group denoted by . * indicates the binding site with the polymethine backbone. R 1 and R 6 represents an aliphatic hydrocarbon group that is identical or different and may have a hydrogen atom or a substituent. R 2 ~ R 5 and R 7 ~ R 12 A structure represented by the following formula (2): [Chemical Formula 10] at at least one end of a polymethine backbone, which may have hydrogen atoms, halogen atoms, or substituents, and is identical or different. (In Equation (2), R 21 represents an aliphatic hydrocarbon group that may have hydrogen atoms or substituents. R 22 ~ R 27 A method for manufacturing an imaging element, characterized in that the squarylium pigment has a structure represented by (* indicates a binding site with a polymethine backbone), wherein at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring, or at least one of the structures added to the squaric acid portion has a structure containing a nitrogen-containing conjugate system composed of a 5-membered ring and a 6-membered ring through one conjugate carbon.

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