Resin compositions for optical components, molded articles, and optical components

Abstract

To provide a resin composition that enables production of a molded article and an optical component exhibiting an enhanced balance of humidity-heat resistance and transparency, and to provide a molded article and an optical component exhibiting an enhanced balance of humidity-heat resistance and transparency.SOLUTION: A resin composition comprising a cyclic olefin-based copolymer (A) and a fatty acid ester composition (B) composed of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (B-2). The cyclic olefin-based copolymer (A) comprises a repeating unit (a) derived from an olefin having a specific structure and a repeating unit (b) derived from a cyclic olefin monomer having a specific structure. The content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 5.0 mass% or less when the total content of pentaerythritol (B-1) and the fatty acid ester of pentaerythritol (B-2) in the fatty acid ester composition (B) is 100 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to resin compositions, molded articles, and optical components. [Background technology]

[0002] Because cyclic olefin copolymer resin compositions have excellent optical properties, they are used, for example, as optical components such as optical lenses. Examples of technologies relating to cyclic olefin resin compositions used in optical components include those described in Patent Document 1.

[0003] Patent Document 1 aims to obtain a thermoplastic norbornene resin composition that exhibits sufficient release properties in melt molding, etc., does not generate voids, and has the heat resistance, chemical resistance, and electrical properties of a thermoplastic norbornene resin, and describes a thermoplastic norbornene resin and (a) general formula: RX n A resin composition comprising a compound represented by (b) a saturated alcohol having 16 or more carbon atoms (wherein n is a natural number, R is a hydrocarbon group which may have a hydroxyl group, and X is a hydroxyacyloxy group; however, when n is 2 or more, the n Xs may be the same or different; and the total number of carbon atoms in the formula is 16 or more) is disclosed. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-241484 [Overview of the project] [Problems that the invention aims to solve]

[0005] In recent years, optical components have been required to have further improvements in moisture and heat resistance and transparency, especially when they are thick, in order to increase design flexibility. This invention has been made in view of the above circumstances, and provides a resin composition that can produce molded articles and optical components with an improved balance of moisture and heat resistance and transparency, as well as molded articles and optical components with an improved balance of moisture and heat resistance and transparency. [Means for solving the problem]

[0006] The inventors of the present invention conducted extensive research to achieve the above objectives. As a result, they discovered that by using a fatty acid ester composition in which the pentaerythritol content is within a specific range, it is possible to obtain a resin composition that provides molded articles and optical components with an improved balance of moisture resistance, heat resistance, and transparency, as well as molded articles and optical components with an improved balance of moisture resistance, heat resistance, and transparency, leading to the present invention.

[0007] In other words, the present invention provides the following resin composition, molded article, and optical component.

[0008] [1] A cyclic olefin copolymer (A), A fatty acid ester composition (B) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (B-2), A resin composition containing, The above cyclic olefin copolymer (A) A repeating unit (a) derived from at least one olefin represented by the following general formula (I), It comprises a repeating unit (b) derived from at least one cyclic olefin monomer selected from the group consisting of a repeating unit (AA) represented by the following general formula (II), a repeating unit (AB) represented by the following general formula (III), and a repeating unit (AC) represented by the following general formula (IV), A resin composition in which the content of pentaerythritol (B-1) in the above fatty acid ester composition (B) is 5.0% by mass or less, when the total content of pentaerythritol (B-1) and the fatty acid ester (B-2) of pentaerythritol in the above fatty acid ester composition (B) is taken as 100% by mass. [Chemical formula] (In the above general formula (I), R 300 represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.) [Chemical formula] (In the above general formula (II), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, and R 61 ~R 78 as well as R a1 and R b1 may be the same as or different from each other, and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and R 75 ~R 78 may be bonded to each other to form a monocyclic or polycyclic ring.) [Chemical formula] (In the above general formula (III), x and d are 0 or integers of 1 or more, y and z are 0, 1 or 2, and R 81 ~R 99 may be the same as or different from each other, and are a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group which is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms or an alkoxy group, and the carbon atom to which R 89 and R 90 are bonded, and the carbon atom to which R <8300013>is bonded or the carbon atom to which R 91 is bonded may be bonded directly or via an alkylene group having 1 to 3 carbon atoms, and when y = z = 0, R 95 and R 92 or R 95 and R 99 may be bonded to each other to form a monocyclic or polycyclic aromatic ring.) [ka] (In the above general formula (IV), R 100 , R 101 (These elements may be identical or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, where f is 1 ≤ f ≤ 18.) [2] In the resin composition described in [1] above, A resin composition in which the content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 3.0% by mass or less, when the total content of pentaerythritol (B-1) and the fatty acid ester (B-2) of pentaerythritol in the fatty acid ester composition (B) is taken as 100% by mass. [3] In the resin composition described in [1] or [2] above, A resin composition comprising a fatty acid having 12 to 18 carbon atoms, which constitutes the fatty acid ester (B-2) of pentaerythritol mentioned above. [4] In any of the resin compositions described in [1] to [3] above, A resin composition comprising the above-mentioned fatty acid ester (B-2) of pentaerythritol, which is represented by the following formula (1). RCOOCH2C(CH2OH)3(1) (In formula (1) above, R is a saturated hydrocarbon group having 11 to 17 carbon atoms.) [5] In any of the resin compositions described in [1] to [4] above, The above-mentioned fatty acid ester (B-2) of pentaerythritol is a resin composition containing pentaerythritol monostearate. [6] In any of the resin compositions described in [1] to [5] above, A resin composition in which the content of the above fatty acid ester composition (B) is 0.05 parts by mass or more and 5.0 parts by mass or less, when the content of the above cyclic olefin copolymer (A) is 100 parts by mass. [7] In any of the resin compositions described in [1] to [6] above, A resin composition in which the total content of the above-mentioned cyclic olefin copolymer (A) and the above-mentioned fatty acid ester composition (B) is 70% by mass or more and 100% by mass or less, when the total solid content of the above-mentioned resin composition is taken as 100% by mass. [8] In any of the resin compositions described in [1] to [7] above, A resin composition further comprising a fatty acid metal salt (C). [9] In any of the resin compositions described in [1] to [8] above, The above-mentioned fatty acid metal salt (C) is a resin composition containing a metal salt of a long-chain fatty acid having 12 or more carbon atoms.

[10] In any of the resin compositions described in [1] to [9] above, A resin composition in which the content of the above fatty acid metal salt (C) is 0.0001 parts by mass or more and 0.50 parts by mass or less per 100 parts by mass of the cyclic olefin copolymer (A).

[11] In any of the resin compositions described in [1] to

[10] above, A resin composition further comprising a hindered amine compound (D).

[12] In the resin composition described in

[11] above, A resin composition in which the content of the above-mentioned hindered amine compound (D) is 0.05 parts by mass or more and 3.0 parts by mass or less per 100 parts by mass of the above-mentioned cyclic olefin copolymer (A).

[13] In any of the resin compositions described in [1] to

[12] above, When the total amount of repeating units constituting the above cyclic olefin copolymer (A) is set to 100 mol%, A resin composition in which the proportion of the repeating unit (a) in the above-mentioned cyclic olefin copolymer (A) is 5 mol% or more and 95 mol% or less.

[14] In any of the resin compositions described in [1] to

[13] above, A resin composition in which the repeating unit (a) in the above-mentioned cyclic olefin copolymer (A) contains repeating units derived from ethylene.

[15] In any of the resin compositions described in [1] to

[14] above, When the total amount of repeating units constituting the above cyclic olefin copolymer (A) is set to 100 mol%, A resin composition in which the proportion of the repeating unit (b) in the above-mentioned cyclic olefin copolymer (A) is 5 mol% or more and 95 mol% or less.

[16] In any of the resin compositions described in [1] to

[15] above, A resin composition in which the repeating unit (b) in the above-mentioned cyclic olefin copolymer (A) is a repeating unit (AA) represented by the above-mentioned general formula (II).

[17] In any of the resin compositions described in [1] to

[16] above, The repeating unit (b) in the above cyclic olefin copolymer (A) is bicyclo[2.2.1]-2-heptene and tetracyclo[4.4.0.1 2,5 .1 7,10 A resin composition comprising repeating units derived from at least one selected from the group consisting of ]-3-dodecene.

[18] In any of the resin compositions described in [1] to

[17] above, The above cyclic olefin copolymer (A) is composed of ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 Random copolymers with ]-3-dodecene, random copolymers of ethylene and bicyclo[2.2.1]-2-heptene, and ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 A resin composition comprising one or more selected from the group consisting of random copolymers of ]-3-dodecene and benzonorbornadiene.

[19] In any of the resin compositions described in [1] to

[18] above, A resin composition having an internal haze of 0.4% or less, as measured by the method described below. (method) Using an injection molding machine, the above resin composition is injection molded under the conditions of a cylinder temperature of 270°C and a mold temperature of 126°C to produce a test piece with an optical surface of 35 mm × 65 mm × 10 mm thickness. The internal haze of the injection-molded test piece is measured using a haze meter with benzyl alcohol in accordance with JIS K7136:2000.

[20] A molded article comprising any of the resin compositions described in [1] to

[19] above. [twenty one] An optical component including the molded body described above

[20] . [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a resin composition that can produce molded articles and optical components with an improved balance of moisture resistance, heat resistance, and transparency, as well as molded articles and optical components with an improved balance of moisture resistance, heat resistance, and transparency. [Modes for carrying out the invention]

[0010] The present invention will be described below based on embodiments.

[0011] <Resin composition> First, the resin composition of this embodiment will be described. The resin composition of this embodiment is a resin composition comprising a cyclic olefin copolymer (A) and a fatty acid ester composition (B) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (B-2), wherein the cyclic olefin copolymer (A) comprises at least one repeating unit (a) derived from an olefin represented by the following general formula (I) and at least one repeating unit (b) derived from a cyclic olefin monomer selected from the group consisting of a repeating unit (AA) represented by the following general formula (II), a repeating unit (AB) represented by the following general formula (III), and a repeating unit (AC) represented by the following general formula, and the content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 5.0% by mass or less when the total content of pentaerythritol (B-1) and the fatty acid ester of pentaerythritol (B-2) in the fatty acid ester composition (B) is taken as 100% by mass.

[0012] [ka]

[0013] In the above general formula (I), R 300 This represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.

[0014] [ka]

[0015] In the above general formula (II), u is 0 or 1, v is 0 or a positive integer, preferably an integer between 0 and 2, more preferably 0 or 1, w is 0 or 1, R 61 ~R 78 Furthermore, R a1 and R b1 These may be the same or different from each other, and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms, R75 ~R 78 These elements may be bonded to each other to form a monocycle or polycycle.

[0016] [ka]

[0017] In the above general formula (III), x and d are integers of 0 or greater than or equal to 1, preferably integers of 0 or greater than or equal to 2, more preferably 0 or 1, and y and z are 0, 1 or 2, R 81 ~R 99 These may be the same or different from each other, and are a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group which is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group which is an aromatic hydrocarbon group which is a 6 to 20 carbon atom or an alkoxy group, and R 89 and R 90 The carbon atom to which it is bonded, and R 93 The carbon atom or R to which it is bonded 91 The carbon atom to which it is bonded may be directly bonded or bonded via an alkylene group having 1 to 3 carbon atoms, and when y=z=0, R 95 and R 92 or R 95 and R 99 These elements may be bonded to each other to form a monocyclic or polycyclic aromatic ring.

[0018] [ka]

[0019] In the above general formula (IV), R 100 , R 101 These elements may be identical or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, where f is 1 ≤ f ≤ 18.

[0020] According to the resin composition of this embodiment, it is possible to obtain molded articles and optical components with improved balance of moisture and heat resistance and transparency. Although the reason is not entirely clear, it is believed that the pentaerythritol content in the fatty acid ester composition (B) is within a specific range, allowing the more polar pentaerythritol to disperse uniformly without phase separation from the less polar cyclic olefin copolymer (A). This improves the balance of moisture and heat resistance and transparency performance of the resulting molded articles and optical components. From the above, the resin composition of this embodiment can be used to produce molded articles and optical components with improved balance of moisture and heat resistance and transparency, even when manufacturing thick molded articles and optical components.

[0021] The content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 5.0% by mass or less, preferably 4.5% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.5% by mass or less, even more preferably 2.0% by mass or less, even more preferably 1.8% by mass or less, even more preferably 1.5% by mass or less, even more preferably 1.0% by mass or less, even more preferably 0.8% by mass or less, and even more preferably 0.5% by mass or less. By keeping the content of pentaerythritol (B-1) below the above upper limit, the balance of moisture and heat resistance and transparency performance of molded articles and optical components using the resin composition of this embodiment can be improved. Furthermore, the lower limit of the content of pentaerythritol (B-1) in the fatty acid ester composition (B) is not particularly limited, but for example, it may be 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.3% by mass or more, or 0.4% by mass or more. Furthermore, the content of pentaerythritol (B-1) in the fatty acid ester composition (B) of this embodiment is preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.01% by mass or more, when the total content of pentaerythritol (B-1) and the fatty acid ester (B-2) of pentaerythritol in the fatty acid ester composition (B) of this embodiment is taken as 100% by mass, from the viewpoint of improving the balance of moisture and heat resistance and transparency performance of molded articles and optical components using the resin composition of this embodiment. The amount is 0.5% by mass or less, more preferably 0.01% by mass or more and 3.0% by mass or less, more preferably 0.01% by mass or more and 2.5% by mass or less, more preferably 0.01% by mass or more and 2.0% by mass or less, more preferably 0.01% by mass or more and 1.8% by mass or less, more preferably 0.05% by mass or more and 1.5% by mass or less, more preferably 0.1% by mass or more and 1.0% by mass or less, more preferably 0.3% by mass or more and 0.8% by mass or less, and more preferably 0.4% by mass or more and 0.5% by mass or less.

[0022] The content of pentaerythritol (B-1) in fatty acid ester composition (B) can be quantified by gas chromatography after creating a calibration curve using, for example, pentaerythritol (manufactured by Wako Pure Chemical Industries, Ltd.). Specifically, the following measurement conditions can be exemplified. Measuring instrument: 6890N (Agilent Technologies) Column: DB-1HT (manufactured by J&W) Carrier gas: He (constant flow mode) Detector: FID More specifically, the content of pentaerythritol (B-1) in the fatty acid ester composition (B) of this embodiment can be measured by the method described in paragraphs 0168 to 0170 of Japanese Patent No. 5778884.

[0023] The following provides a detailed explanation of each component.

[0024] [Cyclic olefin copolymer (A)] The cyclic olefin copolymer (A) in the resin composition of this embodiment includes a repeating unit (a) derived from at least one olefin represented by the general formula (I), and a repeating unit (b) derived from at least one cyclic olefin monomer selected from the group consisting of a repeating unit (AA) represented by the general formula (II), a repeating unit (AB) represented by the general formula (III), and a repeating unit (AC) represented by the general formula (IV).

[0025] One of the copolymerization raw materials for the cyclic olefin copolymer (A) of this embodiment is an olefin monomer that undergoes addition copolymerization to form a repeating unit (a) represented by the above general formula (I). Specifically, an olefin monomer represented by the following general formula (Ia), which corresponds to the above general formula (I), is used.

[0026] [ka]

[0027] In the above general formula (I) and general formula (Ia), R 300represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms. Examples of olefin monomers represented by the above general formula (Ia) include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, etc. Among these, from the viewpoint of obtaining a molded article with superior heat resistance, mechanical properties, and optical properties, at least one selected from ethylene and propylene is preferred as the olefin monomer represented by the above general formula (Ia), and ethylene is more preferred. In other words, the repeating unit (a) in the cyclic olefin copolymer (A) preferably includes a repeating unit derived from at least one selected from ethylene and propylene, and more preferably includes a repeating unit derived from ethylene. Two or more types of olefin monomers represented by the general formula (Ia) may be used. Furthermore, the olefin monomer may include at least one biomass-derived monomer (ethylene, propylene, α-olefin).

[0028] When the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of repeating units (a) in the cyclic olefin copolymer (A) of this embodiment is preferably 5 mol% or more, more preferably 20 mol% or more, even more preferably 40 mol% or more, even more preferably 50 mol% or more, and even more preferably 60 mol% or more. Furthermore, when the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of olefin-derived repeating units (a) in the cyclic olefin copolymer (A) of this embodiment is preferably 95 mol% or less, more preferably 90 mol% or less, even more preferably 85 mol% or less, even more preferably 80 mol% or less, even more preferably 75 mol% or less, even more preferably 70 mol% or less, and even more preferably 65 mol% or less. Furthermore, when the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of olefin-derived repeating units (a) in the cyclic olefin copolymer (A) of this embodiment is preferably 5 mol% to 95 mol%, more preferably 5 mol% to 90 mol%, even more preferably 5 mol% to 85 mol%, even more preferably 20 mol% to 80 mol%, even more preferably 40 mol% to 75 mol%, even more preferably 50 mol% to 70 mol%, and even more preferably 60 mol% to 65 mol%. Furthermore, the proportion of repeating units (a) derived from olefins is, 13 It can be measured by 13C-NMR.

[0029] The cyclic olefin monomer, which is one of the copolymerization raw materials for the cyclic olefin copolymer (A) of this embodiment, is subjected to addition copolymerization to form repeating units (b) derived from the cyclic olefin monomer represented by the above general formula (II), the above general formula (III), or the above general formula (IV). Specifically, cyclic olefin monomers represented by general formulas (IIa), (IIIa), and (IVa), which correspond to the above general formulas (II), (III), and (IV), respectively, are used.

[0030] [ka]

[0031] In the above general formulas (II) and (IIa), u is 0 or 1, v is 0 or a positive integer, preferably an integer between 0 and 2, more preferably 0 or 1, w is 0 or 1, R 61 ~R 78 Furthermore, R a1 and R b1 These may be the same or different from each other, and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms, R 75 ~R 78 These elements may be bonded to each other to form a monocycle or polycycle.

[0032] [ka]

[0033] In the above general formulas (III) and (IIIa), x and d are integers of 0 or greater than or equal to 1, preferably integers of 0 or greater than or equal to 2, more preferably 0 or 1, and y and z are 0, 1 or 2, R 81 ~R 99 These may be the same or different from each other, and are a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group which is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group which is an aromatic hydrocarbon group which is a 6 to 20 carbon atom or an alkoxy group, and R 89 and R 90 The carbon atom to which it is bonded, and R 93 The carbon atom or R to which it is bonded 91 The carbon atom to which it is bonded may be directly bonded or bonded via an alkylene group having 1 to 3 carbon atoms, and when y=z=0, R 95 and R 92 or R 95 and R 99 These elements may be bonded to each other to form a monocyclic or polycyclic aromatic ring.

[0034] [ka]

[0035] In the above general formulas (IV) and (IVa), R 100 , R 101 These elements may be identical or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, where f is 1 ≤ f ≤ 18.

[0036] By using the olefin monomer represented by the general formula (Ia), or the cyclic olefin monomer represented by the general formulas (IIa), (IIIa), or (IVa) as copolymerization components, the solubility of the cyclic olefin copolymer (A) in the solvent is further improved, resulting in better moldability and increased product yield.

[0037] Specific examples of cyclic olefin monomers represented by general formulas (IIa), (IIIa), or (IVa) can be found in paragraphs 0037-0063 of International Publication No. 2006 / 118261. The above cyclic olefin monomers are obtained from dicyclopentadiene and ethylene, but the ethylene may include units derived from biomass-derived monomers (ethylene).

[0038] Specifically, bicyclo-2-heptene derivatives (bicyclohept-2-ene derivatives), tricyclo-3-decene derivatives, tricyclo-3-undecene derivatives, tetracyclo-3-dodecene derivatives, pentacyclo-4-pentadecene derivatives, pentacyclopentadecadiene derivatives, pentacyclo-3-pentadecene derivatives, pentacyclo-4-hexadecene derivatives, pentacyclo-3-hexadecene derivatives, hexacyclo-4-heptadecene derivatives, heptacyclo-5-eicosene derivatives Examples include conductors, heptacyclo-4-eicosene derivatives, heptacyclo-5-heneicosene derivatives, octacyclo-5-docosene derivatives, nonacyclo-5-pentacosene derivatives, nonacyclo-6-hexacosene derivatives, cyclopentadiene-acenaphthylene adducts, 1,4-methano-1,4,4a,9a-tetrahydrofluorene derivatives, 1,4-methano-1,4,4a,5,10,10a-hexahydroanthracene derivatives, and cycloalkylene derivatives having 3 to 20 carbon atoms.

[0039] As the repeating unit (b) in the cyclic olefin copolymer (A), among the cyclic olefin monomers represented by general formulas (IIa), (IIIa), or (IVa), a repeating unit derived from the cyclic olefin monomer represented by general formula (IIa), i.e., the repeating unit (AA) represented by general formula (II), is preferred. Furthermore, it is preferable to use a cyclic olefin monomer represented by general formula (IIa) and either a cyclic olefin monomer represented by general formula (IIIa) or (IVa).

[0040] Examples of cyclic olefin monomers represented by the above general formula (IIa) include bicyclo[2.2.1]-2-heptene (also called norbornene) and tetracyclo[4.4.0.1 2,5 .1 7,10 It is preferable to use at least one selected from the group consisting of ]-3-dodecene (also called tetracyclododecene), and tetracyclo[4.4.0.1 2,5 .1 7,10It is more preferable to use ]-3-dodecene. That is, as the repeating unit (b) in the cyclic olefin copolymer (A), bicyclo[2.2.1]-2-heptene and tetracyclo[4.4.0.1 2,5 .1 7,10 It is preferable that the copolymer contains repeating units derived from at least one selected from the group consisting of ]-3-dodecene. These cyclic olefin monomers have a rigid ring structure, which has the advantage of making it easier to maintain the elastic modulus of the copolymer and molded article.

[0041] When the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of repeating units (b) derived from cyclic olefin monomers in the cyclic olefin copolymer (A) of this embodiment is preferably 5 mol% or more, more preferably 10 mol% or more, even more preferably 15 mol% or more, even more preferably 20 mol% or more, even more preferably 25 mol% or more, even more preferably 30 mol% or more, and even more preferably 35 mol% or more. Furthermore, when the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of repeating units (b) derived from cyclic olefin monomers in the cyclic olefin copolymer (A) of this embodiment is preferably 95 mol% or less, more preferably 80 mol% or less, even more preferably 60 mol% or less, even more preferably 50 mol% or less, and even more preferably 40 mol% or less. Furthermore, when the total amount of repeating units constituting the cyclic olefin copolymer (A) of this embodiment is set to 100 mol%, from the viewpoint of obtaining a molded article having superior heat resistance, mechanical properties, and optical properties, the proportion of repeating units (b) derived from cyclic olefin monomers in the cyclic olefin copolymer (A) of this embodiment is preferably 5 mol% to 95 mol%, more preferably 10 mol% to 95 mol%, even more preferably 15 mol% to 95 mol%, even more preferably 20 mol% to 80 mol%, even more preferably 25 mol% to 60 mol%, even more preferably 30 mol% to 50 mol%, and even more preferably 35 mol% to 40 mol%.

[0042] The copolymerization type of the cyclic olefin copolymer (A) in this embodiment is not particularly limited, but examples include random copolymers and block copolymers. In the resin composition of this embodiment, from the viewpoint of obtaining molded articles and optical components with improved transparency, it is preferable to use a random copolymer as the cyclic olefin copolymer (A).

[0043] The cyclic olefin copolymer (A) of this embodiment is composed of ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 Random copolymers with ]-3-dodecene, random copolymers of ethylene and bicyclo[2.2.1]-2-heptene, and ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 Preferably, it contains one or more selected from the group consisting of random copolymers of ]-3-dodecene and benzonorbornadiene, and ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 Random copolymer with ]-3-dodecene and ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 It is more preferable to include one or more selected from the group consisting of random copolymers of ]-3-dodecene and benzonorbornadiene.

[0044] In this embodiment, one type of cyclic olefin copolymer (A) may be used alone, or two or more types may be used in combination.

[0045] The cyclic olefin copolymer (A) of this embodiment can be manufactured by selecting appropriate conditions according to the methods described in, for example, Japanese Patent Publication No. 60-168708, Japanese Patent Publication No. 61-120816, Japanese Patent Publication No. 61-115912, Japanese Patent Publication No. 61-115916, Japanese Patent Publication No. 61-271308, Japanese Patent Publication No. 61-272216, Japanese Patent Publication No. 62-252406, Japanese Patent Publication No. 62-252407, etc.

[0046] The cyclic olefin copolymer (A) of this embodiment can have its optical properties, such as heat resistance and transparency, improved by contacting the cyclic olefin copolymer (A) or a system containing the cyclic olefin copolymer (A) and the monomer raw material with a hydrogenation catalyst and hydrogen at least once, thereby hydrogenating at least a portion of the unsaturated bonds of the cyclic olefin copolymer (A) and / or the monomer. This hydrogenation, or hydrogenation, can be carried out by conventionally known methods.

[0047] The glass transition temperature (Tg) of the cyclic olefin copolymer (A) according to this embodiment is preferably 120°C or higher, more preferably 125°C or higher, and even more preferably 130°C or higher. When the glass transition temperature (Tg) of the cyclic olefin copolymer (A) is within the above range, even better heat resistance, moisture resistance, and transparency can be obtained when used as an optical component requiring heat resistance, such as an in-vehicle camera lens or a camera lens for a portable device. The upper limit of the glass transition temperature (Tg) of the cyclic olefin copolymer (A) according to this embodiment is not particularly limited, but from the viewpoint of moldability, it is preferably 180°C or lower, more preferably 170°C or lower. Furthermore, the glass transition temperature (Tg) of the cyclic olefin copolymer (A) according to this embodiment is preferably 120°C to 180°C, more preferably 125°C to 180°C, and even more preferably 130°C to 170°C, from the viewpoint of obtaining even better heat resistance, moisture heat resistance, and transparency when used as an optical component requiring heat resistance, such as an in-vehicle camera lens or a camera lens for a portable device.

[0048] The glass transition temperature (Tg) of the cyclic olefin copolymer (A) according to this embodiment can be measured using a differential scanning calorimetry (DSC).

[0049] [Fatty acid ester composition (B)] The fatty acid ester composition (B) of this embodiment consists of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (B-2). The resin composition of this embodiment contains a fatty acid ester composition (B), and the content of pentaerythritol (B-1) is below the above upper limit, thereby enabling the production of molded articles and optical components with improved balance of moisture and heat resistance and transparency, even in thick-walled molded products. Here, the fatty acid ester composition (B) of this embodiment is preferably a composition obtained by an esterification reaction between pentaerythritol and a fatty acid, and the pentaerythritol (B-1) in the fatty acid ester composition (B) of this embodiment preferably includes unreacted pentaerythritol that did not undergo the esterification reaction.

[0050] In the fatty acid ester composition (B) of this embodiment, it is preferable that the fatty acids constituting the pentaerythritol fatty acid ester (B-2) include fatty acids having 12 to 18 carbon atoms, more preferably fatty acids having 14 to 18 carbon atoms, even more preferably fatty acids having 16 to 18 carbon atoms, and even more preferably fatty acids having 18 carbon atoms. This makes it possible to obtain molded articles and optical components with an improved balance of moisture and heat resistance and transparency, and further reduces mold contamination during the molding of molded articles and optical components.

[0051] In the fatty acid ester composition (B) of this embodiment, it is preferable that the fatty acid ester (B-2) of pentaerythritol contains a compound represented by the following formula (1). RCOOCH2C(CH2OH)3(1) (In formula (1) above, R is a saturated hydrocarbon group having 11 to 17 carbon atoms.)

[0052] Furthermore, R is more preferably a saturated hydrocarbon group having 13 to 17 carbon atoms, even more preferably 15 to 17 carbon atoms, and even more preferably 17 carbon atoms.

[0053] Examples of such fatty acid esters (B-2) include one or more selected from the group consisting of pentaerythritol laurate, pentaerythritol myristate, pentaerythritol palmitate, and pentaerythritol stearate. Among these, pentaerythritol stearate is preferred from the viewpoint of obtaining molded articles and optical components with a better balance of moisture and heat resistance and transparency, and from the viewpoint of reducing mold contamination during the molding of molded articles and optical components. Such fatty acid esters (B-2) preferably include one or more selected from the group consisting of monoesters, diesters, triesters, and tetraesters.

[0054] When the fatty acid ester (B-2) contains two or more selected from the group consisting of monoesters, diesters, triesters, and tetraesters, the range of monoester content in the fatty acid ester (B-2) is preferably 10% to 50% by mass, more preferably 15% to 45% by mass, and even more preferably 20% to 40% by mass, when the total amount of fatty acid ester (B-2) is taken as 100% by mass, from the viewpoint of obtaining molded articles and optical components with a better balance of moisture resistance, heat resistance, and transparency. Furthermore, if the fatty acid ester (B-2) contains two or more selected from the group consisting of monoesters, diesters, triesters, and tetraesters, the total content of diesters and triesters in the fatty acid ester (B-2) may be, for example, 50% by mass or more and 90% by mass or less, 55% by mass or more and 85% by mass or less, or 60% by mass or more and 80% by mass or less.

[0055] The lower limit of the content of the fatty acid ester composition (B) in the resin composition of this embodiment is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, even more preferably 0.5 parts by mass or more, even more preferably 1.0 part by mass or more, and even more preferably 1.5 parts by mass or more, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. By having a content of fatty acid ester composition (B) above the above lower limit, it is possible to obtain molded articles and optical components with an improved balance of performance in terms of moisture and heat resistance and transparency. Furthermore, the upper limit of the content of the fatty acid ester composition (B) in the resin composition of this embodiment is preferably 5.0 parts by mass or less, more preferably 4.0 parts by mass or less, and even more preferably 3.0 parts by mass or less, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. By keeping the content of the fatty acid ester composition (B) below the above upper limit, the amount of gasification of the fatty acid ester composition (B) during molding can be suppressed, and the occurrence of clouding can be suppressed. Furthermore, from the viewpoint of obtaining molded articles and optical components with an improved balance of moisture resistance, heat resistance, and transparency, the content of the fatty acid ester composition (B) in the resin composition of this embodiment is preferably 0.05 parts by mass or more and 5.0 parts by mass or less, more preferably 0.1 parts by mass or more and 5.0 parts by mass or less, even more preferably 0.5 parts by mass or more and 5.0 parts by mass or less, even more preferably 1.0 parts by mass or more and 4.0 parts by mass or less, and even more preferably 1.5 parts by mass or more and 3.0 parts by mass or less, when the content of the cyclic olefin copolymer (A) is 100 parts by mass.

[0056] The lower limit of the total content of the cyclic olefin copolymer (A) and fatty acid ester composition (B) in the resin composition of this embodiment is preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 98% by mass or more, when the total solid content of the resin composition is considered to be 100% by mass. By having a total content of the cyclic olefin copolymer (A) and fatty acid ester composition (B) that is above the above lower limit, the balance of moisture and heat resistance and transparency performance of molded articles and optical components using the resin composition of this embodiment can be further improved. Furthermore, the upper limit of the total content of the cyclic olefin copolymer (A) and fatty acid ester composition (B) in the resin composition of this embodiment is not particularly limited, but for example, it is 100% by mass or less. Furthermore, the total content of the cyclic olefin copolymer (A) and fatty acid ester composition (B) in the resin composition of this embodiment is preferably 70% by mass or more and 100% by mass or less, more preferably 80% by mass or more and 100% by mass or less, even more preferably 85% by mass or more and 100% by mass or less, even more preferably 90% by mass or more and 100% by mass or less, even more preferably 95% by mass or more and 100% by mass or less, and even more preferably 98% by mass or more and 100% by mass or less, when the total solid content of the resin composition is taken as 100% by mass.

[0057] [Fatty acid metal salt (C)] The resin composition of this embodiment preferably further comprises a fatty acid metal salt (C). By further including a fatty acid metal salt (C) in the resin composition of this embodiment, the balance between the processability and release properties during injection molding of the resulting resin composition can be improved, and a molded article with a superior appearance can be obtained.

[0058] The fatty acid metal salt (C) of this embodiment preferably includes a metal salt of a long-chain fatty acid having 12 or more carbon atoms, from the viewpoint of further improving the balance between processability and mold release properties. As metal salts of long-chain fatty acids having 12 or more carbon atoms, from the viewpoint of further improving the balance of processability and release properties of the resulting resin composition, preferably include one or more selected from the group consisting of lithium stearate, magnesium stearate, calcium stearate, calcium laurate, calcium ricinoleate, strontium stearate, barium stearate, barium laurate, barium ricinoleate, cadmium stearate, cadmium laurate, cadmium ricinoleate, cadmium naphthenate, cadmium 2-ethylhexoate, zinc laurate, zinc ricinoleate, zinc 2-ethylhexoate, zinc stearate, dibasic zinc stearate, and zinc naphthenate. From the viewpoint of further improving the balance of processability, release properties, and transparency of molded articles using the above resin composition, more preferably include one or more selected from the group consisting of calcium stearate and zinc stearate, and even more preferably include zinc stearate.

[0059] From the viewpoint of further improving the balance of processability and release properties of the resulting resin composition, the lower limit of the fatty acid metal salt (C) content in the resin composition of this embodiment is preferably 0.0001 parts by mass or more, more preferably 0.0005 parts by mass or more, even more preferably 0.0010 parts by mass or more, even more preferably 0.0015 parts by mass or more, even more preferably 0.0020 parts by mass or more, even more preferably 0.0025 parts by mass or more, even more preferably 0.0030 parts by mass or more, and even more preferably 0.0035 parts by mass or more, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. Furthermore, from the viewpoint of further improving the transparency of the molded article using the above resin composition, the upper limit of the fatty acid metal salt (C) content in the resin composition of this embodiment is preferably 0.50 parts by mass or less, more preferably 0.40 parts by mass or less, even more preferably 0.30 parts by mass or less, even more preferably 0.20 parts by mass or less, even more preferably 0.15 parts by mass or less, even more preferably 0.12 parts by mass or less, even more preferably 0.10 parts by mass or less, even more preferably 0.07 parts by mass or less, and even more preferably 0.05 parts by mass or less, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. Furthermore, in the resin composition of this embodiment, the content of the fatty acid metal salt (C) is preferably 0.0001 parts by mass or more and 0.50 parts by mass or less, more preferably 0.0001 parts by mass or more and 0.40 parts by mass or less, even more preferably 0.0005 parts by mass or more and 0.30 parts by mass or less, even more preferably 0.0010 parts by mass or more and 0.20 parts by mass or less, even more preferably 0.0015 parts by mass or more and 0.15 parts by mass or less, even more preferably 0.0020 parts by mass or more and 0.12 parts by mass or less, even more preferably 0.0025 parts by mass or more and 0.10 parts by mass or less, even more preferably 0.0030 parts by mass or more and 0.07 parts by mass or less, and even more preferably 0.0035 parts by mass or more and 0.05 parts by mass or less, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. In this embodiment, the fatty acid metal salt (C) may be contained in the resin composition by simultaneously blending the cyclic olefin copolymer (A), the fatty acid ester composition (B), and the fatty acid metal salt (C), or the fatty acid metal salt (C) may be added later to pellets formed from a resin composition containing the cyclic olefin copolymer (A) and the fatty acid ester composition (B). Furthermore, if the resin composition of this embodiment contains a hindered amine compound (D) described later, the fatty acid metal salt (C) of this embodiment may be contained in the resin composition by simultaneously blending the cyclic olefin copolymer (A), the fatty acid ester composition (B), the fatty acid metal salt (C), and the hindered amine compound (D), or the fatty acid metal salt (C) may be added later to pellets formed from a resin composition containing the cyclic olefin copolymer (A), the fatty acid ester composition (B), and the hindered amine compound (D).

[0060] [Hindered amine compounds (D)] The resin composition of this embodiment preferably further comprises a hindered amine compound (D). By further including a hindered amine compound (D) in the resin composition of this embodiment, the light resistance of the resulting resin composition can be improved, and degradation and discoloration due to UV light can be suppressed.

[0061] From the viewpoint of improving the light resistance of the resulting resin composition, the proportion of carbon atoms in the molecular structure of the hindered amine compound (D) is preferably 67% by mass or more and 80% by mass or less, more preferably 68% by mass or more and 79% by mass or less, and even more preferably 70% by mass or more and 77% by mass or less.

[0062] The above-mentioned proportion of carbon atoms in the molecular structure of hindered amine compound (D) is a theoretical value calculated from the chemical formula, but this theoretical value is in close agreement with the proportion of carbon atoms measured by a CHN elemental analyzer (e.g., CHNS-932, manufactured by LECO).

[0063] The molecular weight of the hindered amine compound (D) is preferably 500 to 3500, more preferably 600 to 3000, and even more preferably 700 to 2000, from the viewpoint of improving the light resistance of the resulting resin composition.

[0064] The above molecular weight of hindered amine compound (D) is a theoretical value calculated from the chemical formula, but this theoretical value is in close agreement with the weight-average molecular weight on a polystyrene basis measured by gel permeation chromatography (GPC) or the molecular weight measured by mass spectrometry.

[0065] Examples of hindered amine compounds (D) that satisfy the above characteristics include compounds represented by the following chemical formulas [1] to

[37] .

[0066] [ka]

[0067] [ka]

[0068] [ka]

[0069] [ka]

[0070] [ka]

[0071] [ka]

[0072] [ka]

[0073] [ka]

[0074] [ka]

[0075] [ka]

[0076] [ka]

[0077] [ka]

[0078] The solubility of the hindered amine compound (D) in 100g of hexane at 23°C is preferably 25g or more, more preferably 50g or more, and even more preferably 100g or more, from the viewpoint of improving the light resistance of the resulting resin composition.

[0079] Examples of hindered amine compounds (D) that satisfy the above hexane solubility include compounds represented by the above chemical formulas [1] to

[37] .

[0080] The temperature at which the hindered amine compound (D) undergoes a 5% heating weight loss when heated at 5°C / min in nitrogen is preferably 300°C or higher, more preferably 320°C or higher, from the viewpoint of improving the light resistance of the resulting resin composition.

[0081] The heat weight loss temperature can be measured, for example, with a TG / DTA (Thermogravimetry / Differential Thermal Analysis) simultaneous measurement device (for example, DTG-60A / 60AH manufactured by Shimadzu Corporation).

[0082] The hindered amine compound (D) of the present embodiment preferably contains a hindered amine compound represented by the following general formula (1).

[0083] [Chemical formula]

[0084] In general formula (1), n represents 1 or 2. R 1 and R 2 may be the same or different and each represents a hydrogen atom or a methyl group, preferably a methyl group. When R 1 and R 2 are methyl groups, coloring of the molded body at high temperatures and in the coexistence of acidic substances can be prevented.

[0085] R 3 and R 4 and R 5 may be the same or different and may be exemplified by the following (1) to (5). (1) A hydrogen atom (2) An alkyl group having 1 to 24 carbon atoms (3) An alicyclic skeleton-containing saturated hydrocarbon group having 5 to 12 carbon atoms and containing an alicyclic skeleton, where the alicyclic skeleton may have 1 to 3 alkyl substituents having 1 to 4 carbon atoms C(4)-R A -Ph(-R B )p (wherein, R A is an alkylene group having 1 to 3 carbon atoms, Ph represents a substituted or unsubstituted phenyl group which may be substituted with an alkyl group having 1 to 4 carbon atoms represented by R B . p is an integer of 0 to 3.). A group represented by (5) It is an alkyl group having 2 to 4 carbon atoms, and has at least one substituent selected from an OH group, an alkoxy group having 1 to 8 carbon atoms, and a dialkylamino group (where the alkyl groups, if plural, may be the same or different and are alkyl groups having 1 to 4 carbon atoms) on a carbon atom other than the carbon atom directly bonded to the nitrogen atom, which is a substituted alkyl group.

[0086] In the above (3), examples of the saturated hydrocarbon group containing an alicyclic skeleton include a cycloalkyl group having 5 to 12 carbon atoms which is unsubstituted or has 1 to 3 alkyl groups having 1 to 4 carbon atoms.

[0087] R 3 、R 4 and R 5 may be the same or different, but preferably (1) a hydrogen atom, (2) an alkyl group having 1 to 24 carbon atoms, or (3) a cycloalkyl group having 5 to 12 carbon atoms which is unsubstituted or has 1 to 3 alkyl groups having 1 to 4 carbon atoms can be used. By using such groups for R 3 、R 4 and R 5 , the transmittance on the short wavelength side becomes good, and it can be suitably used particularly for optical component applications.

[0088] ​​​​​​​​​​​​​​​​​​​​​​​​7B This represents a substituted or unsubstituted phenyl group which may be substituted with an alkyl group having 1 to 4 carbon atoms represented by . p is an integer from 0 to 3. (5)-N(R 7F )(R 7G ) (where R 7F , R 7G Each of these is independently represented by an alkyl group having 1 to 18 carbon atoms, or an N,N-dialkylamino group, or -N(R 7F )- (wherein, R 7F A group represented by (where , is an alkyl group with 1 to 18 carbon atoms, and - represents a bond). (6) An aliphatic saturated hydrocarbon group having 2 to 4 carbon atoms, and at least one substituent selected from an OH group, an alkoxy group having 1 to 8 carbon atoms, or a dialkylamino group (multiple alkyl groups may be the same or different, and are alkyl groups with 1 to 4 carbon atoms), R 6 Substituted aliphatic saturated hydrocarbon groups on carbon atoms other than the carbon atom directly bonded to them (7) The base represented by the following formula

[0090] [ka]

[0091] (R 8 (where * indicates a hydrogen atom or methyl group, and * indicates a bonding bond.)

[0092] In (2) above, the aliphatic saturated hydrocarbon group having 1 to 17 carbon atoms is a hydrogen atom or an alkyl group having 1 to 17 carbon atoms when n=1, and an alkylene group having 1 to 17 carbon atoms when n=2. Furthermore, in (3) above, the saturated hydrocarbon group containing the alicyclic skeleton is a monovalent group when n=1, and a divalent group when n=2. Examples of monovalent groups include the cyclohexyl group, and examples of divalent groups include 1,2-cyclohexylene, 1,3-cyclohexylene, and 1,4-cyclohexylene. Furthermore, in the substituted aliphatic saturated hydrocarbon group of (6) above, R6 If it is a single bond, substituents are present on carbon atoms other than the carbon atom directly bonded to the nitrogen atom.

[0093] R in the above general formula (1) 7 Preferably, when n=1, (1) a hydrogen atom, (2) an alkyl group having 1 to 17 carbon atoms, (3) an unsubstituted or cycloalkyl group having 1 to 3 alkyl groups having 1 to 4 carbon atoms and having 5 to 12 carbon atoms, (5)-N(R 7F )(R 7G ) (where R 7F , R 7G (7) The group represented by the above formula can be used independently of the alkyl group having 1 to 18 carbon atoms. 7 Preferably, (2) an alkylene group having 1 to 17 carbon atoms, (3) an unsubstituted or cycloalkylene group having 5 to 12 carbon atoms with 1 to 3 alkyl groups having 1 to 4 carbon atoms, (5)-N(R 7F )- (wherein, R 7F Groups represented by (where , is an alkyl group having 1 to 18 carbon atoms, and - represents a bond) can be used.

[0094] R 7 By using such a group, good transmittance is achieved on the short wavelength side, making it particularly suitable for use in optical components.

[0095] Examples of hindered amine compounds represented by the general formula (1) include the compounds represented by the chemical formulas [4] to

[37] above.

[0096] Furthermore, as the hindered amine compound represented by the general formula (1), the hindered amine compound represented by the general formula (2) below can be used. By using this hindered amine compound, discoloration of the molded article at high temperatures can be suppressed.

[0097] [ka]

[0098] [In equation (2), a and b are either 0 or 1, and a+b=1. R represents an alkyl group with 1 to 24 carbon atoms. Y is given by the following general formula

[0099] [ka]

[0100] (In the formula, X represents a hydrogen atom or a methyl group, R represents an alkyl group having 1 to 24 carbon atoms, and * represents a bond.) Q is given by the following general formula

[0101] [ka]

[0102] (In the formula, m is 0 or 1, and X and Y are as described above. When m=0, R represents an alkyl group having 1 to 24 carbon atoms, and when m=1, it represents an alkylene group having 1 to 24 carbon atoms. * represents a bond.) Multiple X, Y, and R values ​​may be identical or different from each other.

[0103] Examples of hindered amine compounds represented by the general formula (2) include the compounds represented by the chemical formulas

[12] to

[37] above.

[0104] From the viewpoint of improving the light resistance of the resulting resin composition, the content of the hindered amine compound (D) in the resin composition of this embodiment is preferably 0.05 parts by mass or more and 3.0 parts by mass or less, more preferably 0.10 parts by mass or more and 2.5 parts by mass or less, and even more preferably 0.15 parts by mass or more and 2.3 parts by mass or less, per 100 parts by mass of the cyclic olefin copolymer (A).

[0105] Hindered amine compounds (D) can be produced by selecting appropriate conditions according to the methods described in, for example, Japanese Patent Publication No. 52-73886, Japanese Patent Publication No. 63-286448, Japanese Patent Publication No. 5-9356, Japanese Patent Publication No. 5-43745, etc.

[0106] [Other ingredients] In addition to the cyclic olefin copolymer (A) and the fatty acid ester composition (B), the resin composition of this embodiment may contain known additives as optional components, provided that they do not impair the good physical properties of the resin composition of this embodiment. Examples of additives include antioxidants, secondary antioxidants, lubricants, mold release agents, anti-fogging agents, weather stabilizers, light stabilizers, UV absorbers, and metal deactivators.

[0107] In the resin composition of this embodiment, the upper limit of internal haze measured by the following method is preferably 0.4% or less, more preferably 0.3% or less. By keeping the internal haze below the above upper limit, the balance of moisture and heat resistance and transparency can be further improved in molded articles and optical components using the resin composition of this embodiment. Furthermore, the lower limit of the internal haze mentioned above is not particularly limited, but for example, it may be 0.0% or higher, or 0.1% or higher. Furthermore, in the resin composition of this embodiment, the internal haze measured by the following (method) is preferably 0.0% to 0.4%, more preferably 0.1% to 0.3%, from the viewpoint of further improving the balance of moisture and heat resistance and transparency performance in molded articles and optical components using the resin composition of this embodiment.

[0108] (method) Using an injection molding machine, the above resin composition is injection molded under the conditions of a cylinder temperature of 270°C and a mold temperature of 126°C to produce a test piece with an optical surface of 35 mm × 65 mm × 10 mm thickness. The internal haze of the injection-molded test piece is measured using a haze meter with benzyl alcohol in accordance with JIS K7136:2000.

[0109] The resin composition of this embodiment can be obtained by methods such as: melt-kneading a cyclic olefin copolymer (A) and a fatty acid ester composition (B) using a known kneading apparatus such as an extruder and a Banbury mixer; dissolving the cyclic olefin copolymer (A) and the fatty acid ester composition (B) in a common solvent and then evaporating the solvent; or adding a solution of the cyclic olefin copolymer (A) and the fatty acid ester composition (B) to a poor solvent and precipitating them.

[0110] In the resin composition of this embodiment, the method of mixing the cyclic olefin copolymer (A), fatty acid ester composition (B), and fatty acid metal salt (C), or the cyclic olefin copolymer (A), fatty acid ester composition (B), fatty acid metal salt (C), and hindered amine compound (D) is not particularly limited. The components may be pre-compounded using an extruder or the like, or each component may be dry-blended and then fed into an extruder or the like. Alternatively, a resin composition may be prepared by pre-compounding a cyclic olefin copolymer (A) and a fatty acid ester composition (B), and then adding fatty acid metal salt (C) powder to the molded resin composition. Alternatively, a resin composition may be prepared by pre-compounding a cyclic olefin copolymer (A), a fatty acid ester composition (B), and a hindered amine compound (D), and then adding fatty acid metal salt (C) powder to the molded resin composition.

[0111] <Molded products and optical components> Next, the molded body of this embodiment will be described. The molded article of this embodiment contains the resin composition of this embodiment. Therefore, the molded article of this embodiment has an improved balance of performance in terms of moisture and heat resistance and transparency.

[0112] The molded body of this embodiment can be suitably used as an optical component in an optical system where high-precision image identification is required. Optical components are parts used in optical equipment, and specifically include lenses for various sensors, pickup lenses, projector lenses, prisms, fθ lenses, imaging lenses, light guide plates, lenses for head-mounted displays, etc. From the viewpoint of the effects of this embodiment, it can be suitably used as an fθ lens, imaging lens, sensor lens, prism, or light guide plate.

[0113] The method for molding the resin composition of this embodiment to obtain a molded article is not particularly limited, and known methods can be used. Depending on the application and shape, for example, extrusion molding, injection molding, inflation molding, blow molding, extrusion blow molding, injection blow molding, press molding, vacuum molding, powder slush molding, calendering, foam molding, etc., can be applied. Among these, injection molding is preferred from the viewpoint of moldability and productivity. Furthermore, the molding conditions are appropriately selected depending on the intended use or molding method, but for example, the resin temperature in injection molding is usually appropriately selected within the range of 150°C to 400°C, preferably 200°C to 350°C, and more preferably 230°C to 330°C.

[0114] The embodiments of the present invention have been described above, but these are merely examples, and various other configurations can also be adopted. Furthermore, the present invention is not limited to the embodiments described above, and any modifications, improvements, etc., that can achieve the objectives of the present invention are included in the present invention. [Examples]

[0115] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

[0116] [Example 1] <Polymerization of cyclic olefin copolymer (A)> (Preparation of catalyst) Ethyl aluminum sesquichloride (Al(C2H5) 1.5C l1.5 The solution was diluted with cyclohexane as a solvent to prepare an organoaluminum compound catalyst solution.

[0117] (polymerization) Using a stirred polymerizer, ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 A copolymer solution was obtained by continuously carrying out the copolymerization reaction of ]-3-dodecene. Here, the organoaluminum compound catalyst solution prepared in (catalyst preparation) above was used as the catalyst, and ethylene was supplied into the polymerizer together with hydrogen gas.

[0118] (Decalcification) Water and an aqueous sodium hydroxide solution were added to the obtained copolymer solution to stop the polymerization reaction and remove the catalyst residue present in the copolymer solution (decalcification). Pentaerythrityl-tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] was added as a stabilizer to the decalcified copolymer solution and mixed in a stirring tank for 1 hour.

[0119] (Solvent removal) The solution, mixed with a stabilizer, is heated to 180°C to remove the solvent and unreacted monomers, thereby obtaining a molten cyclic olefin copolymer (A) (ethylene and tetracyclo[4.4.0.1 2,5 .1 7,10 A random copolymer with ]-3-dodecene was obtained. When the total amount of repeating units constituting the above cyclic olefin copolymer (A) is taken as 100 mol%, the content of repeating units derived from ethylene (repeating unit (a)) is 62 mol%, tetracyclo[4.4.0.1 2,5 .1 7,10 The content of repeating units derived from ]-3-dodecene (repeating unit (b)) was 38 mol%.

[0120] At this time, the repeating units (repeating unit (a)) and tetracyclo[4.4.0.1 2,5 .1 7,10The content of repeating units derived from ]-3-dodecene (repeating unit (b)) was measured using a JEOL Ltd. "ECA500" nuclear magnetic resonance spectrometer under the following conditions. Solvent: Deuterated tetrachloroethane Sample concentration: 50-100 g / l-solvent Pulse repetition time: 5.5 seconds Cumulative number of times: 6,000 to 16,000 Measurement temperature: 120℃ Measurements were taken under the conditions described above. 13 The 1C-NMR spectrum revealed that the repeating units (repeating unit (a)) and tetracyclo[4.4.0.1 2,5 .1 7,10 The content of each repeating unit (repeating unit (b)) derived from ]-3-dodecene was quantified.

[0121] <Synthesis of Hindered Amine Compounds> The hindered amine compound (D-1) (N,N',N”-tridedecyl-N,N',N”-tris-(1,2,2,6,6-pentamethyl-4-piperidinyl)-[1,3,5]-triazine-2,4,6-triamine(T12M)), represented by the chemical formula

[35] , was synthesized by the following method.

[0122] [ka]

[0123] (1) Synthesis of N-dodecyl-2,2,6,6-tetramethylpiperidine-4-amine (TADA) 77.6 g (0.5 mol) of 2,2,6,6-tetramethyl-4-piperidone (TAA), 97.3 g (0.525 mol) of dodecylamine, and 2.3 g of 2% platinum carbon (50% hydrated) were charged into 77.6 g of methanol, and the reaction was carried out for 2.5 hours at 50°C under a hydrogen pressure of 0.3 MPa. After filtering off the catalyst, the mixture was desolvated and distilled to obtain 144.4 g of TADA as a yellowish liquid (yield 89%).

[0124] (2) Synthesis of N,N',N”-Tridodecyl-N,N',N”-Tris-(2,2,6,6-tetramethyl-4-piperidinyl)-[1,3,5]-triazine-2,4,6-triamine (TTADA) 194.8 g (0.6 mol) of TADA synthesized in (1) above and 27.5 g (0.66 mol) of 96% sodium hydroxide were charged into 115 g of water. After raising the temperature to 60°C, 55.3 g (0.3 mol) of cyanuric chloride dissolved in 210 g of toluene was added dropwise over 1 hour, and the mixture was aged for 3 hours. After liquid-liquid extraction and washing twice with water, a toluene solution of the reaction product was obtained. Toluene was then removed from the toluene solution of the reaction product, and 274 g of dimethylacetamide (DMAc) and 21.8 g (0.16 mol) of potassium carbonate were charged. After charging, the temperature was raised to 150°C, and 97.4 g (0.3 mol) of TADA dissolved in 97.4 g of DMAc was added dropwise over 2 hours, and the mixture was aged under reflux for 18 hours. After cooling the reaction mass, it was discharged into water containing 3.8 g (0.09 mol) of 96% sodium hydroxide solution to extract the reaction product with toluene, and then washed twice with water to obtain a toluene solution of TTADA.

[0125] (3) Synthesis of N,N',N”-Tridodecyl-N,N',N”-Tris-(1,2,2,6,6-pentamethyl-4-piperidine-4-yl)-[1,3,5]-triazine-2,4,6-triamine (T12M) To the toluene solution of TTADA synthesized in (2) above, 35.1 g (1.17 mol) of paraformaldehyde was added and the temperature was raised to 80°C. After raising the temperature, 49.7 g (1.08 mol) of formic acid was added dropwise over 1 hour, and then the mixture was aged for 3 hours. After cooling the reaction mass, it was washed with 125 g of water containing 7.9 g (0.19 mol) of 96% sodium hydroxide, and then washed twice more with water. The resulting toluene solution was purified by silica gel column chromatography and concentrated to obtain 291.3 g of T12M as a viscous solution. (Yield 89% / TCTA)

[0126] <Manufacturing of resin compositions> (Extrusion) 100 parts by mass of the above-mentioned cyclic olefin copolymer (A) and 2.3 parts by mass of a fatty acid ester composition (Ba) (content of pentaerythritol (B-1) in fatty acid ester composition (Ba) (B-2) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Ba): 0.5% by mass) were kneaded and pelletized. The obtained pellets were dried with hot air at a temperature of 100°C for 4 hours to obtain a resin composition. The glass transition temperature (Tg) of the resin composition was 137°C.

[0127] [Example 2] A resin composition was prepared in the same manner as in Example 1, except that the fatty acid ester composition (Ba) in Example 1 was changed to a fatty acid ester composition (Bb) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Bb): 1.5% by mass). The glass transition temperature (Tg) of the resin composition was 137°C.

[0128] [Example 5] A resin composition was prepared in the same manner as in Example 1, except that the fatty acid ester composition (Ba) in Example 1 was changed to a fatty acid ester composition (Bd) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Bd): 2.5% by mass). The glass transition temperature (Tg) of the resin composition was 137°C.

[0129] [Example 6] A resin composition was prepared in the same manner as in Example 1, except that the fatty acid ester composition (Ba) in Example 1 was changed to a fatty acid ester composition (Be) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Be): 4.5% by mass). The glass transition temperature (Tg) of the resin composition was 137°C.

[0130] [Example 7] A resin composition was prepared in the same manner as in Example 6, except that 0.04 parts by mass of zinc (C-1) stearate was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 137°C.

[0131] [Example 8] A resin composition was prepared in the same manner as in Example 1, except that 0.001 parts by mass of calcium (C-2) stearate was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 137°C.

[0132] [Example 9] A resin composition was prepared in the same manner as in Example 1, except that 0.6 parts by mass of a hindered amine compound ((D-1), compound name: N,N',N”-tridedecyl-N,N',N”-tris-(1,2,2,6,6-pentamethyl-4-piperidinyl)-[1,3,5]-triazine-2,4,6-triamine(T12M)) was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 135°C.

[0133] [Example 10] A resin composition was prepared in the same manner as in Example 2, except that 0.04 parts by mass of zinc stearate (C-1) and 0.4 parts by mass of a hindered amine compound (D-1) were added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 136°C.

[0134] [Example 17] A resin composition was prepared in the same manner as in Example 10, except that zinc (C-1) stearate was not added during the extrusion process, but 0.04 parts by mass of zinc (C-1) stearate was added after the extrusion process. The glass transition temperature (Tg) of the resin composition was 136°C.

[0135] [Comparative Example 1] A pelletized resin composition was obtained using the same method as in Example 1, except that the fatty acid ester composition (Ba) was not used in the extrusion step in Example 1. The glass transition temperature (Tg) of the resin composition was 150°C.

[0136] [Comparative Example 2] A resin composition was prepared in the same manner as in Example 1, except that the fatty acid ester composition (Ba) in Example 1 was replaced with a fatty acid ester composition (Bc) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (B-2) (the content of pentaerythritol (B-1) in fatty acid ester composition (Bc): 5.5% by mass). The glass transition temperature (Tg) of the resin composition was 137°C.

[0137] [Comparative Example 5] A resin composition was prepared in the same manner as in Example 1, except that the fatty acid ester composition (Ba) in Example 1 was replaced with a fatty acid ester composition (Bf) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (B-2) (the content of pentaerythritol (B-1) in fatty acid ester composition (Bf) is 10.5% by mass). The glass transition temperature (Tg) of the resin composition was 137°C.

[0138] [Example 3] The deashed copolymer solution obtained in the same manner as in Example 1 was continuously hydrogenated using a nickel / diatomaceous earth catalyst (N112, manufactured by JGC Chemical Co., Ltd.) under the conditions of a reaction temperature of 100°C, a reaction pressure of 1 MPa, and an LHSV of 5 / hr. To the hydrogenated copolymer solution, 0.4% by mass of pentaerythrityl-tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] was added as a stabilizer relative to the total copolymer solution, and the mixture was stirred in a stirring tank for 1 hour. Subsequently, desolvation was carried out in the same manner as in Example 1 to obtain a hydrogenated cyclic olefin copolymer (Aa).

[0139] (Extrusion) 100 parts by mass of the obtained hydrogenated cyclic olefin copolymer (Aa) and 2.0 parts by mass of a fatty acid ester composition (Ba) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (B-2) (content of pentaerythritol (B-1) in fatty acid ester composition (Ba): 0.5% by mass) were kneaded and pelletized. The obtained pellets were dried with hot air at a temperature of 100°C for 4 hours to obtain a resin composition. The glass transition temperature (Tg) of the resin composition was 139°C.

[0140] [Example 4] A resin composition was prepared in the same manner as in Example 3, except that the fatty acid ester composition (Ba) in Example 3 was changed to a fatty acid ester composition (Bb) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Bb): 1.5% by mass). The glass transition temperature (Tg) of the resin composition was 139°C.

[0141] [Example 11] A resin composition was prepared in the same manner as in Example 3, except that the fatty acid ester composition (Ba) in Example 3 was changed to a fatty acid ester composition (Bd) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Bd): 2.5% by mass). The glass transition temperature (Tg) of the resin composition was 139°C.

[0142] [Example 12] A resin composition was prepared in the same manner as in Example 3, except that the fatty acid ester composition (Ba) in Example 3 was changed to a fatty acid ester composition (Be) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Be): 4.5% by mass). The glass transition temperature (Tg) of the resin composition was 139°C.

[0143] [Example 13] A resin composition was prepared in the same manner as in Example 12, except that 0.04 parts by mass of zinc (C-1) stearate was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 139°C.

[0144] [Example 14] A resin composition was prepared in the same manner as in Example 12, except that 0.001 parts by mass of calcium (C-2) stearate was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 139°C.

[0145] [Example 15] A resin composition was prepared in the same manner as in Example 3, except that 0.6 parts by mass of the hindered amine compound (D-1) was added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 137 °C.

[0146] [Example 16] A resin composition was prepared in the same manner as in Example 4, except that 0.04 parts by mass of zinc stearate (C-1) and 0.4 parts by mass of the hindered amine compound (D-1) were added during the extrusion process. The glass transition temperature (Tg) of the resin composition was 138 °C.

[0147] [Example 18] A resin composition was prepared in the same manner as in Example 16, except that zinc stearate (C-1) was not added during the extrusion process and 0.04 parts by mass of zinc stearate (C-1) was added after the extrusion process. The glass transition temperature (Tg) of the resin composition was 136 °C.

[0148] [Comparative Example 3] A resin composition was pelletized in the same manner as in Example 3, except that the fatty acid ester composition (Ba) was not used in the extrusion process of Example 3. The glass transition temperature (Tg) of the resin composition was 152 °C.

[0149] [Comparative Example 4] A resin composition was prepared in the same manner as in Example 3, except that the fatty acid ester composition (Ba) in Example 3 was changed to a fatty acid ester composition (Bc) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, pentaerythritol tristearate: 23% by mass) (B-2) (content of pentaerythritol (B-1) in the fatty acid ester composition (Bc): 5.5% by mass). The glass transition temperature (Tg) of the resin composition was 139 °C.

[0150] [Comparative Example 6] A resin composition was prepared in the same manner as in Example 3, except that the fatty acid ester composition (Ba) in Example 3 was changed to a fatty acid ester composition (Bf) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (a mixture of pentaerythritol monostearate: 32% by mass, pentaerythritol distearate: 45% by mass, and pentaerythritol tristearate: 23% by mass) (content of pentaerythritol (B-1) in fatty acid ester composition (Bf): 10.5% by mass). The glass transition temperature (Tg) of the resin composition was 139°C.

[0151] <Method for evaluating resin compositions> (Glass transition temperature) The glass transition temperature of the resin composition was measured using a differential scanning calorimeter. The glass transition temperature (Tg) of a resin composition was measured under a nitrogen atmosphere using a Discovery DSC-2500 manufactured by TA Instruments. The resin composition was heated from room temperature (23°C) to 200°C at a heating rate of 10°C / min and held for 5 minutes. Then, it was cooled to -20°C at a cooling rate of 10°C / min and held for 5 minutes. The glass transition temperature (Tg) of the resin composition was then determined from the endothermic curve obtained when heating to 200°C at a heating rate of 10°C / min.

[0152] <Method for fabricating and evaluating molded products> (Fabrication of molded parts) For the resin compositions obtained in Examples 1-6 and Comparative Examples 1-3, 3 mm thick rectangular molded bodies were produced by the method described below (1) for rectangular plate molding, and 10 mm thick cylindrical molded bodies were produced by the method described below (2) for cylindrical molding. For the resin compositions obtained in Examples 7-12 and Comparative Examples 4-6, 10 mm thick cylindrical molded bodies were produced by the method described below (2) for cylindrical molding.

[0153] (1) Square plate forming Using an injection molding machine (Sumitomo Heavy Industries, Ltd.; SE30DUZ), the resin compositions obtained in each example and comparative example were injection molded under conditions of a cylinder temperature of 270°C and a mold temperature of 126°C to produce test pieces of rectangular molded bodies with optical surfaces measuring 35 mm in length, 65 mm in width, and 3 mm or 10 mm in thickness.

[0154] (2) Cylindrical Forming Using an injection molding machine (Sumitomo Heavy Industries, Ltd.; SE30DUZ), the resin compositions obtained in each example and comparative example were injection molded under conditions of a cylinder temperature of 270°C and a mold temperature of 135°C to produce test pieces of cylindrical molded bodies with an optical surface of 30 mm in diameter and 10 mm in thickness.

[0155] (Internal haze) For each test piece of the rectangular and cylindrical molded bodies, internal haze was measured using a haze meter with benzyl alcohol in accordance with JIS K7136:2000. The results are shown in Tables 1 and 2.

[0156] (Visual evaluation) The transparency of each test piece of the rectangular plate and cylindrical molded body was visually evaluated using an optical microscope and a focusing lamp. Those that showed no clouding and were transparent were classified as transparent (pass), and those showing clouding were classified as cloudy (fail). The results are shown in Tables 1 and 2.

[0157] (Heat and moisture resistance evaluation) A heat and humidity resistance test was conducted on each test piece of the rectangular plate molded body and cylindrical molded body by leaving them in an atmosphere of 65°C and 90% relative humidity for 168 hours. After that, they were removed to an atmosphere of 23°C and 50% relative humidity and left to stand for 48 hours. The internal haze of these test pieces was measured using a haze meter with benzyl alcohol in accordance with JIS K7136:2000. The Δinternal haze (the difference between the internal haze after the heat and humidity resistance test and the internal haze before the test) was used as an indicator of heat and humidity resistance, and pieces with a Δinternal haze of 1.0% or less were considered pass, and those with a Δinternal haze exceeding 1.0% were considered fail.

[0158] (Release property evaluation) Using an injection molding machine (manufactured by Sumitomo Heavy Industries, Ltd.; SE30DUZ), under the conditions of a cylinder temperature of 270 °C and a mold temperature of 126 °C, the resin compositions obtained in each example and each comparative example were injection molded, and test pieces of rectangular plate molded bodies having an optical surface with a length of 35 mm × width of 65 mm × thickness of 3 mm or 10 mm were produced respectively. When ejecting the molded product from the mold after injection molding, if it could be ejected without resistance, it was evaluated as A, and if there was resistance during ejection, it was evaluated as B.

[0159] (Light resistance evaluation) Using an injection molding machine (manufactured by Sumitomo Heavy Industries, Ltd.; SE30DUZ), under the conditions of a cylinder temperature of 270 °C and a mold temperature of 126 °C, the resin compositions obtained in each example and each comparative example were injection molded, and test pieces of rectangular plate molded bodies having an optical surface with a length of 35 mm × width of 65 mm × thickness of 3 mm or 10 mm were produced respectively. For the obtained test pieces, a light resistance test was carried out at 63 °C for 500 hours using a UV fade meter (manufactured by Suga Test Instruments Co., Ltd.; U48AUHB). For the test pieces before and after the light resistance test, the transmittance was measured with an ultraviolet-visible spectrophotometer (manufactured by Hitachi High-Technologies Corporation; UH5700). When the transmittance difference (Δ transmittance) at 450 nm before and after the light resistance test was within -5 points, it was evaluated as A, when it was -5 to -10 points, it was evaluated as B, and when it exceeded -10 points, it was evaluated as C.

[0160] (Comprehensive evaluation) As the comprehensive evaluation, those that passed both the visual evaluation and the damp heat resistance evaluation were regarded as "qualified", and those that failed at least one of the visual evaluation and the damp heat resistance evaluation were regarded as "unqualified".

[0161]

Table 1

[0162]

Table 2

[0163] The molded articles of the resin compositions described in each example, in which the content of pentaerythritol (B-1) contained in the fatty acid ester composition (B) was 5.0% by mass or less, showed an improved balance of humid heat resistance and transparency compared to the molded articles of the resin compositions described in each comparative example. Furthermore, the resin compositions described in Examples 7-8, 10, 13-14, and 16-18, which further contained a fatty acid metal salt (C), showed improved mold release properties while maintaining a balance of humid heat resistance and transparency compared to the resin compositions without the fatty acid metal salt (C). In addition, Examples 9, 10, and 15-18, which further contained a hindered amine compound (D), showed improved light resistance compared to the resin compositions without the hindered amine compound (D).

[0164] This application claims priority based on Japanese Patent Application No. 2023-162860, filed on 26 September 2023, and incorporates all of its disclosures herein.

Claims

1. A cyclic olefin copolymer (A), A fatty acid ester composition (B) consisting of pentaerythritol (B-1) and a fatty acid ester of pentaerythritol (B-2), A resin composition for optical components, comprising: The cyclic olefin copolymer (A) A repeating unit (a) derived from at least one olefin represented by the following general formula (I), It comprises a repeating unit (b) derived from at least one cyclic olefin monomer selected from the group consisting of a repeating unit (AA) represented by the following general formula (II), a repeating unit (AB) represented by the following general formula (III), and a repeating unit (AC) represented by the following general formula (IV), The content of pentaerythritol (B-1) in the fatty acid ester composition (B) is 0.1% by mass or more and 3.0% by mass or less, when the total content of pentaerythritol (B-1) and the fatty acid ester of pentaerythritol (B-2) in the fatty acid ester composition (B) is taken as 100% by mass. It further contains a fatty acid metal salt (C), The content of the fatty acid ester composition (B) is 2.3 parts by mass or more and 5.0 parts by mass or less, when the content of the cyclic olefin copolymer (A) is 100 parts by mass. The fatty acid metal salt (C) comprises one or more selected from the group consisting of calcium stearate and zinc stearate. A resin composition for optical components, wherein the content of the fatty acid metal salt (C) is 0.0001 parts by mass or more and 0.50 parts by mass or less per 100 parts by mass of the cyclic olefin copolymer (A). 【Chemistry 1】 (In the above general formula (I), R ３００ (This represents a hydrogen atom or a linear or branched hydrocarbon group having 1 to 29 carbon atoms.) 【Chemistry 2】 (In the above general formula (II), u is 0 or 1, v is 0 or a positive integer, w is 0 or 1, R ６１ ~R ７８ And R ａ１ and R ｂ１ These may be the same or different from each other, and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms, R ７５ ~R ７８ These may be bonded to each other to form a monocycle or polycycle. 【Transformation 3】 (In the general formula (III), x and d are integers of 0 or 1 or more, y and z are 0, 1 or 2, and R ８１ ~R ９９ may be the same as or different from each other, and is a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group which is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 15 carbon atoms, an aromatic hydrocarbon group having 6 to 20 carbon atoms or an alkoxy group. R ８９ and R ９０ The carbon atom to which is bonded, and the carbon atom to which R ９３ is bonded or the carbon atom to which R ９１ is bonded may be bonded directly or via an alkylene group having 1 to 3 carbon atoms. Also, when y = z = 0, R ９５ and R ９２ or R ９５ and R ９９ may be bonded to each other to form a monocyclic or polycyclic aromatic ring.) 【Chemistry 4】 (In the above general formula (IV), R １００ , R １０１ (These elements may be identical or different from each other, and represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, where f is 1 ≤ f ≤ 18.)

2. In the resin composition for optical components according to claim 1, A resin composition for optical components in which the fatty acid constituting the pentaerythritol fatty acid ester (B-2) contains a fatty acid having 12 to 18 carbon atoms.

3. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components in which the fatty acid ester (B-2) of pentaerythritol is represented by the following formula (1). RCOOCH ２ C(CH ２ OH) ３ (1) (In formula (1) above, R is a saturated hydrocarbon group having 11 to 17 carbon atoms.)

4. In the resin composition for optical components according to claim 1 or 2, The aforementioned fatty acid ester (B-2) of pentaerythritol is a resin composition for optical components containing pentaerythritol monostearate.

5. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components, wherein the total content of the cyclic olefin copolymer (A) and the fatty acid ester composition (B) is 70% by mass or more when the total solid content of the resin composition is taken as 100% by mass.

6. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components further comprising a hindered amine compound (D).

7. In the resin composition for optical components according to claim 6, A resin composition for optical components, wherein the content of the hindered amine compound (D) is 0.05 parts by mass or more and 3.0 parts by mass or less per 100 parts by mass of the cyclic olefin copolymer (A).

8. In the resin composition for optical components according to claim 1 or 2, When the total amount of repeating units constituting the cyclic olefin copolymer (A) is set to 100 mol%, A resin composition for optical components, wherein the proportion of the repeating unit (a) in the cyclic olefin copolymer (A) is 5 mol% or more and 95 mol% or less.

9. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components in which the repeating unit (a) in the cyclic olefin copolymer (A) contains repeating units derived from ethylene.

10. In the resin composition for optical components according to claim 1 or 2, When the total amount of repeating units constituting the cyclic olefin copolymer (A) is set to 100 mol%, A resin composition for optical components, wherein the proportion of the repeating unit (b) in the cyclic olefin copolymer (A) is 5 mol% or more and 95 mol% or less.

11. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components in which the repeating unit (b) in the cyclic olefin copolymer (A) comprises a repeating unit (AA) represented by the general formula (II).

12. In the resin composition for optical components according to claim 1 or 2, The repeating unit (b) in the cyclic olefin copolymer (A) is bicyclo[2.2.1]-2-heptene and tetracyclo[4.4.0.1 ２，５ 1. ７，１０ A resin composition for optical components comprising repeating units derived from at least one selected from the group consisting of ]-3-dodecene.

13. In the resin composition for optical components according to claim 1 or 2, The cyclic olefin copolymer (A) is composed of ethylene and tetracyclo[4.4.0.1 ２，５ 1. ７，１０ Random copolymers of ethylene with 3-dodecene, random copolymers of ethylene with bicyclo[2.2.1]-2-heptene, and ethylene with tetracyclo[4.4.0.1] ２，５ 1. ７，１０ A resin composition for optical components comprising one or more selected from the group consisting of random copolymers of ]-3-dodecene and benzonorbornadiene.

14. In the resin composition for optical components according to claim 1 or 2, A resin composition for optical components having an internal haze of 0.4% or less, as measured by the method described below. (method) Using an injection molding machine, the resin composition for optical components is injection molded under the conditions of a cylinder temperature of 270°C and a mold temperature of 126°C to produce a test piece with an optical surface of 35 mm × 65 mm × 10 mm thickness. The internal haze of the injection-molded test piece is measured using a haze meter with benzyl alcohol in accordance with JIS K7136:2000.

15. A molded article comprising the resin composition for optical components according to claim 1 or 2.

16. An optical component comprising the molded body described in claim 15.

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