Resin composition, resin additive composition, resin structure, method for improving weather resistance, method for producing resin composition, and hindered amine light stabilizer

Abstract

This resin composition contains a synthetic resin, a hindered amine light stabilizer, and a photocatalyst, wherein the content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass per 100 parts by mass of the synthetic resin.

Description

Technical Field

[0001] The present invention relates to a resin composition, a resin additive composition, a resin structure, a method for improving weather resistance, a method for producing a resin composition, and a hindered amine light stabilizer. Background Art

[0002] So far, various technologies for modifying resin compositions have been developed. As such a technology, for example, the technology described in Patent Document 1 is known. Patent Document 1 proposes a polyolefin resin composition comprising a polyolefin resin having a melt index of 6 to 60 g / 10 minutes, titanium oxide, and a specific hindered amine stabilizer, and discloses that the polyolefin resin composition has extremely excellent weather resistance and light resistance, and is not prone to discoloration over time despite the use of a polyolefin resin having a large melt index as a resin component. (Claim 1 of Patent Document 1, etc.)

[0003] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2005-47942 Summary of the invention

[0004] Technical problem to be solved by the invention However, as a result of studies conducted by the present inventors, it was found that the polyolefin-based resin composition described in Patent Document 1 has room for improvement in terms of weather resistance and color tone controllability.

[0005] Technical solutions for solving technical problems The present inventors have conducted further research and found that the weather resistance of the resin composition can be improved by adding a hindered amine light stabilizer and a photocatalyst to a synthetic resin. Based on this knowledge, they have conducted further in-depth research and found that a resin composition with excellent color tone controllability can be achieved by setting the amount of photocatalyst added to a predetermined value or less, thereby completing the present invention.

[0006] According to one embodiment of the present invention, there are provided the following resin composition, resin additive composition, resin structure, method for improving weather resistance, method for producing a resin composition, and hindered amine light stabilizer.

[0007] 1. A resin composition, characterized in that the resin composition comprises: Synthetic resin; Hindered amine light stabilizers; and Photocatalysts, The content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

[0008] 2. The resin composition according to 1., wherein the synthetic resin comprises a polyolefin-based resin.

[0009] 3. The resin composition according to 1. or 2., wherein the synthetic resin comprises a polyethylene resin.

[0010] 4. The resin composition according to any one of 1. to 3., wherein the synthetic resin does not contain a polypropylene-based resin.

[0011] 5. The resin composition according to any one of 1. to 4., wherein the hindered amine light stabilizer contains a component having a molecular weight of less than 1,500.

[0012] 6. The resin composition according to any one of 1. to 5., wherein the hindered amine light stabilizer contains a component having a molecular weight of 500 or more.

[0013] 7. The resin composition according to any one of 1. to 6., wherein the hindered amine light stabilizer has a piperidine ring, and the piperidine ring is a secondary amine.

[0014] 8. The resin composition according to any one of 1. to 7., wherein the hindered amine light stabilizer comprises one or two or more compounds represented by the following general formula (1).

[0015] [Chemistry 1]

[0016] In the above general formula (1), R 1 represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkoxy group having 1 to 30 carbon atoms, and R 2 ~R 5 Each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, and X represents a fatty acid residue having 7 to 29 carbon atoms, a group represented by the following general formula (2), or a group represented by the following general formula (3).

[0017] [Chemistry 2]

[0018] [Chemistry 3]

[0019] In the above general formulas (2) and (3), represents a site bonded to a carbonyl group, and n represents an integer of 1 to 20.

[0020] 9. The resin composition according to any one of 1. to 8., wherein the hindered amine light stabilizer comprises a light stabilizer selected from the group consisting of 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, and 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate. s-triazine polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,6-bis(1,2,2,6 ,6-pentamethyl-4-piperidinylamino) hexane / dibromoethane polycondensate, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tris[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]undecane, 1,6,11- Tris[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]undecane, 3,9-bis[1,1-dimethyl-2-{tris(2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[1,1-dimethyl-2-{tris(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 2,2,4,4-tetramethyl-7-oxa-3,20-diazadispiro-[5.1.11.2]-heneicosane-21-one, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)dispiro-[5.1.11.2]-heneicosane-21-one} and one or more compounds represented by the following general formula (5).

[0021] [Chemistry 4]

[0022] In the above general formula (5), R 6 and R 7 Each independently represents an alkyl group having 1 to 30 carbon atoms or 1-(n-propoxy)-2,2,6,6-tetramethylpiperidin-4-yl group, and p represents an integer of 0 or greater.

[0023] 10. The resin composition according to any one of 1. to 9., wherein the photocatalyst comprises titanium oxide.

[0024] 11. The resin composition according to any one of 1. to 10., wherein the resin composition does not contain a colorant (except a photocatalyst).

[0025] 12. A resin additive composition, characterized in that it is added to a synthetic resin and used to produce the resin composition described in any one of 1. to 11. The resin additive composition comprises: Hindered amine light stabilizers; and Photocatalyst.

[0026] 13. A resin structure, characterized in that the resin structure is formed from the resin composition described in any one of 1. to 11.

[0027] 14. A method for improving the weather resistance of a resin composition, characterized in that the resin composition comprises a synthetic resin, The method comprises the step of adding a hindered amine light stabilizer and a photocatalyst to the synthetic resin.

[0028] 15. The method for improving the weather resistance of a resin composition according to 14., wherein: The amount of the photocatalyst added is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

[0029] 16. A method for producing a resin composition, characterized in that the method comprises the step of adding a hindered amine light stabilizer and a photocatalyst to a synthetic resin.

[0030] 17. The method for producing a resin composition according to 16., wherein The amount of the photocatalyst added is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

[0031] 18. A hindered amine light stabilizer for a resin composition, characterized in that the resin composition comprises a synthetic resin, a hindered amine light stabilizer and a photocatalyst, and the content of the photocatalyst is greater than 0.001 parts by mass and less than 0.5 parts by mass relative to 100 parts by mass of the synthetic resin.

[0032] 19. The hindered amine light stabilizer according to 18., wherein the hindered amine light stabilizer contains a component having a molecular weight of less than 1500.

[0033] 20. The hindered amine light stabilizer according to 18. or 19., wherein the hindered amine light stabilizer contains a component having a molecular weight of 500 or more.

[0034] 21. The hindered amine light stabilizer according to any one of 18. to 20., wherein the hindered amine light stabilizer has a piperidine ring, and the piperidine ring is a secondary amine.

[0035] 22. The hindered amine light stabilizer according to any one of 18. to 21., wherein the hindered amine light stabilizer comprises one or two or more compounds represented by the following general formula (1).

[0036] [Chemistry 5]

[0037] In the above general formula (1), R 1 represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkoxy group having 1 to 30 carbon atoms, and R 2 ~R 5 Each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, and X represents a fatty acid residue having 7 to 29 carbon atoms, a group represented by the following general formula (2), or a group represented by the following general formula (3).

[0038] [Chemistry 6]

[0039] [Chemistry 7]

[0040] In the above general formulas (2) and (3), represents a site bonded to a carbonyl group, and n represents an integer of 1 to 20.

[0041] 23. The hindered amine light stabilizer according to any one of 18. to 22., wherein the hindered amine light stabilizer comprises: 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, Morpholino-s-triazine polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,6-bis(1,2, 2,6,6-pentamethyl-4-piperidinylamino) hexane / dibromoethane polycondensate, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tris[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]undecane, 1,6,1 1-Tris[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]undecane, 3,9-bis[1,1-dimethyl-2-{tris(2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[1,1-dimethyl-2-{tris(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 2,2,4,4-tetramethyl-7-oxa-3,20-diazadispiro-[5.1.11.2]-heneicosane-21-one, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)dispiro-[5.1.11.2]-heneicosane-21-one} and one or more compounds represented by the following general formula (5).

[0042] [Chemistry 8]

[0043] In the above general formula (5), R 6 and R 7 Each independently represents an alkyl group having 1 to 30 carbon atoms or 1-(n-propoxy)-2,2,6,6-tetramethylpiperidin-4-yl group, and p represents an integer of 0 or greater.

[0044] Effects of the Invention According to the present invention, a resin composition, a resin additive composition, a resin structure, a method for improving weather resistance, a method for producing a resin composition, and a hindered amine light stabilizer having excellent weather resistance and color tone controllability are provided. DETAILED DESCRIPTION

[0045] The outline of the resin composition according to the present embodiment will be described.

[0046] The resin composition of the present embodiment has a structure including a synthetic resin, a hindered amine light stabilizer, and a photocatalyst, wherein the content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

[0047] The present inventors have found that a photocatalyst functions as an auxiliary agent for a hindered amine-based light stabilizer.

[0048] As a result of conducting studies based on this knowledge, the present inventors have found that the weather resistance of a resin composition can be improved by adding a hindered amine-based light stabilizer and a photocatalyst to a synthetic resin.

[0049] The detailed mechanism is still uncertain, but the nitroxide radical (-NO·) species of the hindered amine light stabilizer is regenerated by oxidation caused by the holes of the photocatalyst generated by light irradiation. That is, the nitroxide radical (-NO·) species of the hindered amine light stabilizer reacts with the degradation factor (R·) of the resin generated by light irradiation to become (-NOR) species, and the (-NOR) species is oxidized by the holes of the photocatalyst generated by light irradiation to become (-NO·) species again. It is believed that the weather resistance effect can be stably exhibited.

[0050] According to the present embodiment, based on the above findings on the regeneration mechanism of nitroxide radical (-NO·) species, a method for improving the weather resistance of a resin composition containing a synthetic resin (weather resistance improving method) can be provided, which includes a step of adding a hindered amine light stabilizer and a photocatalyst to a synthetic resin.

[0051] In addition, according to the knowledge of the inventors, by increasing the amount of photocatalyst added, the weather resistance of the resin composition containing a synthetic resin and a hindered amine light stabilizer can be improved, and on the other hand, the light reflectivity of the resin composition is increased. As a result, when the resin composition is colored by adding a pigment or the like, the reflection and scattering of light affect the color tone, making it difficult to make the resin structure formed by the resin composition become the desired color tone. That is, if the amount of photocatalyst added is increased, the color tone controllability of the resin composition may be reduced.

[0052] From the viewpoint of the color tone controllability, in the present embodiment, in the resin composition containing the synthetic resin and the hindered amine-based light stabilizer, the content of the photocatalyst is preferably less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

[0053] From the perspective of such weather resistance and color tone controllability, according to the present embodiment, a method for improving the weather resistance and color tone controllability of a resin composition containing a synthetic resin (a method for improving weather resistance and color tone controllability) can be provided, the method comprising the step of adding a hindered amine-based light stabilizer and a photocatalyst to a synthetic resin in such a manner that the amount of the photocatalyst added is greater than 0.001 parts by mass and less than 0.5 parts by mass relative to 100 parts by mass of the synthetic resin.

[0054] Hereinafter, the structure of the resin composition according to the present embodiment will be described in detail.

[0055] The resin composition of the present embodiment is a resin composition containing at least a synthetic resin, a hindered amine-based light stabilizer, and a photocatalyst.

[0056] Examples of the synthetic resin include thermoplastic resins and thermosetting resins.

[0057] Examples of the thermoplastic resin include polyolefin resins, polyamide resins, polyester resins, polyacetal resins, polylactic acid, polyphenylene sulfide and other crystalline resins, polycarbonate resins, styrene resins, acrylic resins, polyurethane resins, halogen-containing resins, petroleum resins, coumarone resins, polyvinyl alcohol, polyvinyl acetate, polyphenylene ether and other amorphous resins, thermoplastic elastomers and the like.

[0058] Examples of the thermosetting resin include phenolic resin, urea resin, melamine resin, epoxy resin, unsaturated polyester resin, and synthetic rubber. The synthetic resin may be used alone or in combination of two or more.

[0059] Furthermore, the synthetic resin may be a copolymer or a polymer alloy.

[0060] The synthetic resin is preferably a thermoplastic resin, and more preferably contains a crystalline resin. In addition, the synthetic resin preferably contains a polyolefin resin. Examples of the polyolefin resin include polyethylene resins such as low-density polyethylene, linear low-density polyethylene, high-density polyethylene, cross-linked polyethylene, and ultra-high molecular weight polyethylene, polypropylene resins such as homopolypropylene, random copolymer polypropylene, block copolymer polypropylene, impact copolymer polypropylene, high-impact copolymer polypropylene, and maleic anhydride-modified polypropylene, polybutene-1, cycloolefin polymers, poly-3-methyl-1-butene, poly-3-methyl-1-pentene, and poly-4-methyl-1-pentene. α -Olefin polymers, ethylene-methyl methacrylate copolymers, ethylene-vinyl acetate copolymers, etc. α -olefin copolymers, etc. Here, the molecular weight, degree of polymerization, density, softening point, ratio of insoluble components in the solvent, degree of stereoregularity, presence or absence of catalyst residues, types of monomers as raw materials, matching ratio, types of catalysts used in polymerization (for example, Ziegler catalyst, metallocene catalyst, etc.) of the polyolefin resin are not particularly limited and can be appropriately selected. In addition, among the polyolefin resins, polypropylene resins are particularly preferred. Further, the synthetic resin may include polyethylene resins or may only include polyethylene resins. It should be noted that the synthetic resin may not include polypropylene resins.

[0061] The hindered amine light stabilizer preferably contains at least a component having a molecular weight of less than 1500. In this case, when a thick resin structure (e.g., a thickness of 2 mm or more) is formed from the resin composition, the formed resin structure has particularly excellent weather resistance. The hindered amine light stabilizer preferably contains at least a component having a molecular weight of 1000 or less, more preferably contains at least a component having a molecular weight of 800 or less, and further preferably contains at least a component having a molecular weight of 500 or less.

[0062] It should be noted that the hindered amine light stabilizer may contain at least a component having a molecular weight of 500 or more. In this case, when a resin structure having a small thickness (e.g., a thickness of 0.2 mm or less) is formed from the resin composition, the formed resin structure has particularly excellent weather resistance. The hindered amine light stabilizer preferably contains at least a component having a molecular weight of 800 or more, more preferably contains at least a component having a molecular weight of 1000 or more, and further preferably contains at least a component having a molecular weight of 1500 or more.

[0063] The hindered amine light stabilizer may contain only one of a component having a molecular weight of less than 1500 and a component having a molecular weight of 1500 or more, or may contain both a component having a molecular weight of less than 1500 and a component having a molecular weight of 1500 or more.

[0064] In addition, the hindered amine light stabilizer preferably has a piperidine ring, and the piperidine ring is a secondary amine.

[0065] The hindered amine light stabilizer may contain, for example, one or two or more compounds represented by the following general formula (1).

[0066] [Chemistry 9]

[0067] In the above general formula (1), R 1 represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkoxy group having 1 to 30 carbon atoms, and R 2 ~R 5 Each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, and X represents a fatty acid residue having 7 to 29 carbon atoms, a group represented by the following general formula (2), or a group represented by the following general formula (3).

[0068] [Chemistry 10]

[0069] [Chemistry 11]

[0070] In the above general formulas (2) and (3), represents a site bonded to a carbonyl group, and n represents an integer of 1 to 20.

[0071] Examples of the alkyl group having 1 to 30 carbon atoms include straight-chain alkyl groups such as methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, n-eicosyl, n-docosyl, and n-triacontyl; branched-chain alkyl groups such as isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, neopentyl, tert-pentyl, 2-heptyl, tert-heptyl, 2-ethylhexyl, tert-octyl, isononyl, isodecyl, and 3,5,5-trimethylhexyl; and cyclic alkyl groups such as cyclopentyl, cyclohexyl, cyclooctyl, and adamantyl.

[0072] Examples of the alkoxy group having 1 to 30 carbon atoms include groups having a structure in which the above-mentioned alkyl group having 1 to 30 carbon atoms is bonded to an oxygen atom.

[0073] The fatty acid residue having 7 to 29 carbon atoms is a residue obtained by removing a carboxyl group from a fatty acid having 8 to 30 carbon atoms, and examples thereof include n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl, n-heneicosyl, n-docosyl, n-tricosyl, n-pentacosyl, n-heptacosyl, and n-nonacosyl.

[0074] In the above general formula (1), R 1 It is preferably a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an alkoxy group having 1 to 20 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, further preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, further preferably a hydrogen atom or a methyl group, and particularly preferably a methyl group.

[0075] In the above general formula (1), R 2 ~R 5 Each independently is preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, more preferably a hydrogen atom, a methyl group, an isopropyl group, a tert-butyl group or a tert-amyl group, further preferably a hydrogen atom or a methyl group, and further preferably a methyl group.

[0076] In the above general formula (1), X is preferably a fatty acid residue having 9 to 25 carbon atoms, and more preferably a fatty acid residue having 11 to 21 carbon atoms. X is preferably a residue obtained by removing a carboxyl group from a saturated fatty acid.

[0077] The alkyl group, alkoxy group and fatty acid residue may or may not have a substituent. When they have a substituent, for example, there may be mentioned halogen atoms such as fluorine atoms, chlorine atoms, bromine atoms and iodine atoms, hydroxyl groups, nitro groups, cyano groups and amino groups.

[0078] As R in the above general formulas (2) and (3),1 ~R 5 , examples include the groups exemplified in the above general formula (1).

[0079] In the general formula (3), n is preferably an integer of 2-18, more preferably an integer of 4-14, and even more preferably an integer of 6-10.

[0080] Specific examples of the compound represented by the general formula (1) include the following compounds No. 1 to No. 11.

[0081] [Chemistry 12]

[0082] In addition, the hindered amine light stabilizer includes: 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)- 1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,5,8,12-tetra[2,4-bis( N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetra[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tri[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]undecane, 1,6,11-tri[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]decane undecane, 3,9-bis[1,1-dimethyl-2-{tris(2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[1,1-dimethyl-2-{tris(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 2,2,4,4-tetramethyl-7-oxa-3,20-diazabisspiro-[5.1.11.2]-heneicosane-21-one, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)bisspiro-[5.1.11.2]-heneicosane-21-one} and one or more compounds represented by the following general formula (5).

[0083] In the resin composition of the present embodiment, the hindered amine light stabilizer is preferably selected from 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol diol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / succinic acid diethyl polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazine-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4

[0063] The present invention further comprises one or more of the following compounds: 1,6-bis(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazine-6-yl]-1,5,8,12-tetraazadodecane, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)dispiro-[5.1.11.2]-heneicosane-21-one} and a compound represented by the following general formula (5), more preferably 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate , 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino-s-triazin-6-yl]-1,5,8,12-tetraazadodecane and poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)dispiro-[5.1.11.2]-heneicosane-21-one}, further preferably comprising 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate and 1,5,8,12 -tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino-s-triazine-6-yl]-1,5,8,12-tetraazadodecane, further preferably comprising 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate and 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, particularly preferably comprising 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate.

[0084] [Chemistry 13]

[0085] Here, in the above general formula (5), R 6 and R 7 Each independently represents an alkyl group having 1 to 30 carbon atoms or 1-(n-propoxy)-2,2,6,6-tetramethylpiperidin-4-yl. In addition, p is an integer greater than or equal to 0, and can be, for example, 0 to 10. Here, examples of the alkyl group having 1 to 30 carbon atoms include straight-chain alkyl groups such as methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, n-eicosyl, n-docosyl, and n-triacontyl; branched-chain alkyl groups such as isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, neopentyl, tert-pentyl, 2-heptyl, tert-heptyl, 2-ethylhexyl, tert-octyl, isononyl, isodecyl, and 3,5,5-trimethylhexyl; and cyclic alkyl groups such as cyclopentyl, cyclohexyl, cyclooctyl, and adamantyl.

[0086] Specific examples of the compound represented by the general formula (5) include the following Compound No. 12 and Compound No. 13.

[0087] [Chemistry 14]

[0088] [Chemistry 15]

[0089] The content of the hindered amine light stabilizer in the resin composition is, for example, 0.001 mass parts or more and 5 mass parts or less relative to 100 mass parts of the synthetic resin, preferably 0.005 mass parts or more and 3 mass parts or less, more preferably 0.01 mass parts or more and 0.3 mass parts or less, and further preferably 0.02 mass parts or more and 0.1 mass parts or less. By setting the content of the hindered amine light stabilizer in the resin composition to the above range, the weather resistance of the resin composition can be improved. In addition, by setting the content of the hindered amine light stabilizer in the resin composition to the above range, the frosting or exudation of the hindered amine light stabilizer from the resin composition can be fully suppressed.

[0090] In another embodiment, the hindered amine light stabilizer can be used to be added to a weather-resistant resin composition as described above. That is, the hindered amine light stabilizer comprises a synthetic resin, a hindered amine light stabilizer and a photocatalyst, and the content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass relative to 100 parts by mass of the synthetic resin, and can be used as a hindered amine light stabilizer for a resin composition.

[0091] The photocatalyst is a semiconductor having a band gap equivalent to the wavelength of ultraviolet visible light. As the photocatalyst included in the resin composition of the present embodiment, for example, metal oxides such as titanium oxide, zinc oxide, tungsten oxide, tin oxide, niobium oxide, and strontium titanate can be cited. From the viewpoint of making the weather resistance of the resin composition more excellent, the photocatalyst preferably includes titanium oxide, zinc oxide or tungsten oxide, more preferably includes titanium oxide or zinc oxide, and further preferably includes titanium oxide. The metal oxide can be used alone or in combination of two or more.

[0092] When the photocatalyst includes titanium oxide, the titanium oxide may be, for example, rutile titanium oxide, anatase titanium oxide, a mixture of rutile titanium oxide and anatase titanium oxide, etc. From the viewpoint of further improving the weather resistance of the resin composition, the titanium oxide preferably includes rutile titanium oxide, and particularly preferably includes only rutile titanium oxide.

[0093] As the photocatalyst, particles having inorganic and / or organic treatments applied to the surface of the photocatalyst particles or particles not subjected to such surface treatments can be used. In addition, the photocatalyst may be a particle having iron, copper, or the like supported on the surface of the particle.

[0094] The average particle size of the photocatalyst particles is, for example, 0.01m m or more and 1.00 m m or less, preferably 0.03 m m or more and 0.50 m m or less, more preferably 0.05 m m or more and 0.40 m m or less, more preferably 0.10 m m or more and 0.30 m m or less, more preferably 0.15 m m or more and 0.25 m m or less. By setting it within such a range, the dispersibility of the photocatalyst in the resin composition can be improved. In addition, by setting it within such a range, the reflection and scattering of light caused by the photocatalyst in the resin composition can be fully suppressed, and the color tone controllability of the resin composition can be improved.

[0095] In this embodiment, the average particle size of the photocatalytic particles refers to the average value of 100 particles measured by observation using an electron microscope ( m m).

[0096] Relative to 100 parts by mass of synthetic resin, the content of the photocatalyst in the resin composition is 0.001 parts by mass or more and less than 0.5 parts by mass, preferably 0.003 parts by mass or more and 0.3 parts by mass or less, more preferably 0.005 parts by mass or more and 0.1 parts by mass or less, further preferably 0.007 parts by mass or more and 0.05 parts by mass or less, further preferably 0.008 parts by mass or more and 0.03 parts by mass or less, particularly preferably 0.01 parts by mass or more and 0.02 parts by mass or less. By setting the content of the photocatalyst in the resin composition to the above range, the weather resistance of the resin composition can be improved. In addition, by setting the content of the photocatalyst in the resin composition to the above range, the reflection and scattering of light caused by the photocatalyst in the resin composition can be fully suppressed, and the color tone controllability of the resin composition can be improved.

[0097] When the content of the photocatalyst in the resin composition is A (mass %) and the content of the hindered amine light stabilizer is B (mass %), the value of A / B is, for example, 0.001 or more and 10 or less, preferably 0.005 or more and 1.0 or less, more preferably 0.01 or more and 0.6 or less, further preferably 0.05 or more and 0.5 or less, further preferably 0.1 or more and 0.3 or less. By setting the value of A / B to the above range, a balance between weather resistance and color tone controllability can be achieved in the resin composition.

[0098] In the present embodiment, resin combination can include other added components other than the above-mentioned components as required. As other added components, for example, antioxidants such as phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, ultraviolet light absorbers, benzoate light stabilizers, fatty acid metal salts, dispersants, lubricants, hydrotalcites, flame retardants, flame retardant aids, fillers, antistatic agents, fluorescent whitening agents, colorants, curing accelerators, organic solvents, water, anti-yellowing agents, leveling agents, defoamers, thickeners, anti-settling agents, antifogging agents, etc. can be cited. Here, as colorant, pigment, dye, etc. can be cited. It should be noted that the resin combination of the present embodiment preferably does not include colorant (except photocatalyst). That is, the resin combination of the present embodiment is preferably not colored.

[0099] Next, one of the characteristics of the resin composition will be described.

[0100] The resin composition was molded into a plate-shaped molded product with a thickness of 2 mm. For the molded product, the relative diffuse reflectance spectrum was measured using barium sulfate as a standard white plate, and the relative diffuse reflectance (%) at a wavelength of 370 nm was set as r 1. Set the relative diffuse reflectance (%) at 420nm to r 2.

[0101] at this time, r 2 / r The value of 1 may be, for example, 0.80 or more and 8.0 or less, preferably 0.95 or more and 7.0 or less, more preferably 1.00 or more and 5.00 or less, further preferably 1.20 or more and 3.00 or less, further preferably 1.30 or more and 2.50 or less, and particularly preferably 1.50 or more and 2.00 or less. r 2 / r When the value of 1 is within the above range, the weather resistance of the resin composition can be further improved. r 2 / r When the value of 1 is within the above range, reflection and scattering of light in the visible light wavelength region are suppressed, and thus the color tone controllability of the resin composition can be improved.

[0102] in addition, r The value of 1 may be, for example, 0% to 20%, preferably 0.5% to 16%, more preferably 1% to 15%, further preferably 3% to 12%, and still further preferably 5% to 11%. 370 nm is a wavelength that contributes to light degradation in synthetic resins, so by r By setting the value of 1 to the above range, the weather resistance of the resin composition can be further improved.

[0103] The method for producing the resin composition of the present embodiment is not particularly limited, and any conventionally known method can be adopted.

[0104] The method for producing a resin composition includes the step of adding a hindered amine light stabilizer and a photocatalyst to a synthetic resin. In the adding step of the method for producing a resin composition, the amount of the photocatalyst added is preferably set to 0.001 parts by mass or more and less than 0.5 parts by mass relative to 100 parts by mass of the synthetic resin.

[0105] As an example of a method for producing the resin composition, there can be mentioned a method in which a synthetic resin, a hindered amine light stabilizer, a photocatalyst, and other additional components as required are pre-mixed using various mixers such as a tumble mixer and an FM mixer, and then melt-kneaded using a Banbury mixer, a roll mill, a Brabender mixer, a single-screw kneading extruder, a double-screw kneading extruder, a kneader, etc. Here, the temperature of the melt kneading may be, for example, a processing temperature of 100° C. to 280° C.

[0106] In addition, the components may not be mixed in advance or only a part of the components may be mixed in advance, and the components may be supplied to an extruder using a feeder, and melt-kneaded to produce a resin composition. In addition, a part of the components may be mixed in advance and supplied to an extruder, and melt-kneaded to produce a resin composition as a masterbatch, and then the components may be mixed again with other components and melt-kneaded to produce a resin composition.

[0107] The synthetic resin used in the mixing and kneading step may have a predetermined shape such as powder, granule or fiber.

[0108] The resin composition of the present embodiment may be, for example, solid, and may have a fixed shape such as powder, granules, pellets, agglomerates, tablets, or flakes. In addition, the resin composition of the present embodiment may be liquid, slurry, emulsion, or paste.

[0109] The resin additive composition of the present embodiment is an additive added to a synthetic resin for producing the above-mentioned resin composition. The resin additive composition contains at least a hindered amine-based light stabilizer and a photocatalyst.

[0110] The shape of the resin additive composition may be, for example, pellets, pellets or powders, etc. Among these, pellets or pellets are preferred from the viewpoint of suppressing the bleeding of components, and pellets are particularly preferred.

[0111] The hindered amine contained in the resin additive composition may be the same hindered amine as exemplified as the hindered amine contained in the above resin composition. In addition, the photocatalyst contained in the resin additive composition may be the same photocatalyst as exemplified as the photocatalyst contained in the above resin composition.

[0112] When the content of the photocatalyst in the resin additive composition is A' (mass %) and the content of the hindered amine light stabilizer is B' (mass %), the value of A' / B' may be in the same numerical range as the value of A / B in the above resin composition.

[0113] The resin additive composition may not contain a synthetic resin, but may be a masterbatch containing a synthetic resin in addition to the hindered amine-based light stabilizer and the photocatalyst.

[0114] When the resin additive composition is a masterbatch containing a synthetic resin, the content of the hindered amine light stabilizer in the resin additive composition is not particularly limited, but may be, for example, an amount greater than 10 parts by mass relative to 100 parts by mass of the synthetic resin. When the resin additive composition is a masterbatch containing a synthetic resin, the content of the hindered amine light stabilizer in the resin additive composition is preferably an amount greater than 20 parts by mass, more preferably 25 parts by mass or more, further preferably 30 parts by mass or more, and further preferably 40 parts by mass or more.

[0115] Furthermore, the resin additive composition may contain additional components other than the hindered amine-based light stabilizer and the photocatalyst exemplified as substances that may be contained in the above-mentioned resin composition as necessary.

[0116] The resin structure of the present embodiment is not particularly limited as long as it is formed from the above-mentioned resin composition.

[0117] The resin structure may be composed of a resin composition in part or in its entirety, but it is preferred that the resin structure be composed of a resin composition in its entirety.

[0118] Specific examples of the resin structure include a molded article obtained by molding a resin composition, a coating film obtained by curing a coating material containing a resin composition, etc. Among them, a molded article obtained by molding a resin composition is preferred.

[0119] Here, as the molded article, for example, there can be mentioned an injection molded article, a fiber, a biaxially stretched film, a uniaxially stretched film, an unstretched film, a sheet, a thermoformed molded article, an extrusion blow molded article, an injection blow molded article, an injection stretch blow molded article, a profile extrusion molded article, a rotational molded article, and more specifically, there can be mentioned a vehicle component, a building material, an agricultural material, a film, a sheet, and the like. In addition, as the coating film, for example, there can be mentioned a coating film obtained by applying a coating material including a resin composition to a substrate including a metal such as a galvanized steel sheet, a galvanized alloy steel sheet, a stainless steel sheet, a tin-plated steel sheet, a resin such as a polymethyl methacrylate resin, a polycarbonate resin, a polyester resin, a polystyrene resin, an ABS resin, an AS resin, a polyamide resin, a polyarylate resin, a polymethacrylimide resin, a polyallyl diglycol carbonate resin, and the like by a known method such as brush coating, rod coating, spray coating, dip coating, spin coating, curtain coating, etc. to form a coating layer, and then curing the coating layer by a known method such as room temperature curing, heat curing, ultraviolet irradiation, and the like.

[0120] The embodiments of the present invention are described above, but these are only examples of the present invention, and various structures other than the above can also be adopted. In addition, the present invention is not limited to the above-mentioned embodiments, and deformation, improvement, etc. within the scope of being able to achieve the purpose of the present invention are included in the present invention.

[0121] Example Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited at all to the description of these Examples.

[0122] (Examples 1 to 10, Comparative Examples 1 to 6) <Manufacturing of resin composition> 100 parts by mass of the following synthetic resin, a hindered amine light stabilizer and a photocatalyst in the proportions shown in Table 1 or Table 2, 0.1 parts by mass of tetrakis[methylene-3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]methane as a phenolic antioxidant, 0.1 parts by mass of tris(2,4-di-tert-butylphenyl)phosphite as a phosphorus antioxidant, and 0.1 parts by mass of calcium stearate as a fatty acid metal salt were mixed using an FM stirrer, and the obtained mixture was melt-kneaded using a twin-screw extruder (TEX28V manufactured by The Japan Steel Works, Ltd.) at a melt temperature of 230° C. and a screw speed of 150 rpm, granulated, and then dried at 60° C. for 8 hours to produce a granular resin composition.

[0123] Here, in Table 1 and Table 2, the unit of the mixing ratio of each component is part by mass.

[0124] The raw material information described in Table 1 and Table 2 is shown below.

[0125] (Synthetic resin) ·Synthetic resin 1: Homopolypropylene (MFR (230°C, 2.16kg) = 10g / 10min) (Hindered amine light stabilizer) Hindered amine light stabilizer 1: Compound No. 7 mentioned above Hindered amine light stabilizer 2: Compound No. 8 mentioned above Hindered amine light stabilizer 3: Compound No. 5 mentioned above Hindered amine light stabilizer 4: Compound No. 10 mentioned above Hindered amine light stabilizer 5: Hindered amine compound represented by the following chemical formula (4) (molecular weight 2000 to 3300) [Chemistry 16]

[0126] (Photocatalyst) Titanium oxide 1: Titanium oxide particles (CR-63, manufactured by Ishihara Sangyo Co., Ltd., rutile type, particle size: 0.21 μm) Titanium oxide 2: Titanium oxide particles (TCR-52, manufactured by Sakai Chemical Industry Co., Ltd., particle size: 0.23 m m) Titanium oxide 3: Titanium oxide particles (R-24, manufactured by Sakai Chemical Industry Co., Ltd., particle size: 0.20 m m) Titanium oxide 4: Titanium oxide particles (CR-90, manufactured by Ishihara Sangyo Co., Ltd., rutile type, particle size: 0.25 m m) Titanium oxide 5: Titanium oxide ultrafine particles (TTO-55 (S), manufactured by Ishihara Sangyo Co., Ltd., particle size: 0.035 m m) Zinc oxide 1: Zinc oxide particles (manufactured by Mitsui Kinzoku Co., Ltd., average particle size: 0.75 m m) Here, the “particle size” is an average particle size of 100 particles measured by observation using an electron microscope.

[0127] [Table 1]

[0128] [Table 2]

[0129] <Characteristics Evaluation> The obtained resin compositions were evaluated on the following items.

[0130] (Hue controllability) The obtained resin composition was injection molded under the conditions of a resin temperature of 230°C and a mold temperature of 40°C to prepare a plate-shaped test piece with a thickness of 2 mm. For this test piece, a relative diffuse reflectance spectrum using barium sulfate as a standard white plate was measured using an ultraviolet-visible spectrophotometer (manufactured by JASCO Corporation, V-750), and the relative diffuse reflectance (%) at a wavelength of 370 nm was set as r 1. Set the relative diffuse reflectance (%) at 420nm to r 2. Examples 1 to 10 and Comparative Examples 1 to 6 are shown in Tables 1 and 2. r 1. r 2 and r 2 / r The value of 1.

[0131] (Weather resistance) The above-mentioned test piece was introduced into a weathering tester (manufactured by Suga Testing Machine Co., Ltd., Xenon Weather Meter), and a weathering test was performed under the conditions specified in SAEJ2412. Here, the glossiness (gloss value) of each test piece before and during the weathering test was measured, and the time (h) from the start of the test to the glossiness of the test piece becoming 80% or less of the glossiness before the weathering test was used as the "80% gloss retention time" as an indicator of weather resistance. Here, the glossiness of the test piece was measured using a gloss meter (manufactured by Nippon Denshoku Industries, VG-2000) under the condition of a measurement accuracy of 60°. For Examples 1 to 10 and Comparative Examples 1 to 6, the 80% gloss retention time is shown in Tables 1 and 2.

[0132] The resin compositions of Examples 1 to 10 had longer 80% gloss retention times than the resin compositions of Comparative Examples 1 to 2 and 4 to 6, and thus showed results of being excellent in weather resistance.

[0133] In addition, the resin compositions of Examples 1 to 10 showed a relative diffuse reflectance of 420 nm, as compared with the resin composition of Comparative Example 3. r That is, when the resin compositions of Examples 1 to 10 are colored by adding a pigment or the like, the influence on the color tone caused by the reflection and scattering of light in the visible light region becomes small, so it can be seen that the resin compositions of Examples 1 to 10 are superior in color tone controllability compared to the resin composition of Comparative Example 3.

[0134] (Example 11, Comparative Examples 7 to 9) <Production of Film Containing Resin Composition> 2100 parts by mass of the following synthetic resin, the above hindered amine light stabilizer 5 and the photocatalyst (the above titanium oxide 1) were mixed in the proportions shown in Table 3, 0.05 parts by mass of octadecyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate as a phenolic antioxidant, 0.05 parts by mass of tris(2,4-di-tert-butylphenyl) phosphite as a phosphorus antioxidant, 0.05 parts by mass of calcium stearate as a fatty acid metal salt, and 0.2 parts by mass of a dispersant (nonionic surfactant "Denon 3000" manufactured by Maruyama Oil Chemical Industry Co., Ltd.) were mixed uniformly, and the resulting mixture was introduced into a melt kneading device (Labo Plastomill manufactured by Toyo Seiki Co., Ltd.) connected with a small single-screw extruder (D1220B manufactured by Toyo Seiki Co., Ltd.) and a T-die (MT60B manufactured by Toyo Seiki Co., Ltd.). Micro), melt kneaded at a melt temperature of 200°C and a screw speed of 20 rpm, and then molded into a thickness of 50 mm at a T-die temperature of 190°C and a roll temperature of 40°C. m m's membrane.

[0135] Here, in Table 3, the unit of the mixing ratio of each component is part by mass.

[0136] The raw material information described in Table 3 is shown below.

[0137] (Synthetic resin) ·Synthetic resin 2: Linear low-density polyethylene (manufactured by Japan Polyethylene Co., Ltd.: trade name "Harmorex NF464N" [Table 3]

[0138] <Characteristics Evaluation> (Weather resistance) The film obtained as described above was cut into a rectangle of 30 mm×60 mm and introduced as a test sample into a weather tester (Xenon Weather Meter manufactured by AMETEK, device name “AtlasCi4000”) and a weather test was performed under the conditions of Table 4 in accordance with ISO4892-2.

[0139] [Table 4]

[0140] Then, the time (h) from the start of the test until the breakage of the test sample was visually confirmed was measured and used as an index of weather resistance. The results are also recorded in Table 3.

[0141] The film including the resin composition of Example 11 showed a result that the weather resistance was superior to the films including the resin compositions of Comparative Examples 7 to 9.

[0142] This application claims the benefit of priority based on Japanese patent application No. 2022-066464, filed on April 13, 2022, the disclosure of which is incorporated herein in its entirety.

Claims

1. A resin composition, characterized in that Include: Synthetic resin; Hindered amine light stabilizers; and Photocatalysts, The content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

2. The resin composition according to claim 1, wherein The synthetic resin includes a polyolefin-based resin.

3. The resin composition according to claim 1 or 2, wherein The synthetic resin includes a polyethylene-based resin.

4. The resin composition according to any one of claims 1 to 3, wherein The synthetic resin does not include a polypropylene-based resin.

5. The resin composition according to any one of claims 1 to 4, wherein The hindered amine light stabilizer includes a component with a molecular weight of less than 1500.

6. The resin composition according to any one of claims 1 to 5, wherein The hindered amine light stabilizer includes a component having a molecular weight of 500 or more.

7. The resin composition according to any one of claims 1 to 6, wherein The hindered amine light stabilizer has a piperidine ring, and the piperidine ring is a secondary amine.

8. The resin composition according to any one of claims 1 to 7, wherein The hindered amine light stabilizer comprises one or more compounds represented by the following general formula (1): , In the above general formula (1), R 1 represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkoxy group having 1 to 30 carbon atoms, and R 2 ~R 5 Each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a fatty acid residue having 7 to 29 carbon atoms, a group represented by the following general formula (2) or a group represented by the following general formula (3); , , In the above general formulas (2) and (3), represents a site bonded to a carbonyl group, and n represents an integer of 1 to 20.

9. The resin composition according to any one of claims 1 to 8, wherein The hindered amine light stabilizer comprises: 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine condensation polymer, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine condensation polymer, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine condensation polymer, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine condensation polymer, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1 ,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,5,8,12-tetra[2,4-bis(N -butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetra[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tri[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl-amino]undecane, 1,6,11-tri[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl-amino] Undecane, 3,9-bis[1,1-dimethyl-2-{tris(2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[1,1-dimethyl-2-{tris(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 2,2,4,4-tetramethyl-7-oxa-3,20-diazabisspiro-[5.1.11.2]-heneicosane-21-one, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)bisspiro-[5.1.11.2]-heneicosane-21-one} and one or more of the compounds represented by the following general formula (5);. , In the above general formula (5), R 6 and R 7 Each independently represents an alkyl group having 1 to 30 carbon atoms or 1-(n-propoxy)-2,2,6,6-tetramethylpiperidin-4-yl group, and p represents an integer of 0 or greater.

10. The resin composition according to any one of claims 1 to 9, wherein The photocatalyst includes titanium oxide.

11. The resin composition according to any one of claims 1 to 10, wherein The resin composition does not include a colorant other than a photocatalyst.

12. A resin additive composition, characterized in that: Added to a synthetic resin and used for producing a resin composition according to any one of claims 1 to 11, The resin additive composition comprises: Hindered amine light stabilizers; and Photocatalyst.

13. A resin structure, characterized in that: The present invention is formed from the resin composition according to any one of claims 1 to 11.

14. A method for improving the weather resistance of a resin composition, characterized in that: The resin composition comprises a synthetic resin, The method comprises the step of adding a hindered amine light stabilizer and a photocatalyst to the synthetic resin.

15. The method for improving the weather resistance of a resin composition according to claim 14, wherein: The amount of the photocatalyst added is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

16. A method for producing a resin composition, characterized in that: The method comprises the steps of adding a hindered amine light stabilizer and a photocatalyst to a synthetic resin.

17. The method for producing a resin composition according to claim 16, wherein: The amount of the photocatalyst added is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

18. A hindered amine light stabilizer for a resin composition, characterized in that: The invention comprises a synthetic resin, a hindered amine light stabilizer and a photocatalyst, wherein the content of the photocatalyst is 0.001 parts by mass or more and less than 0.5 parts by mass based on 100 parts by mass of the synthetic resin.

19. The hindered amine light stabilizer according to claim 18, wherein The hindered amine light stabilizer includes a component with a molecular weight of less than 1500.

20. The hindered amine light stabilizer according to claim 18 or 19, wherein The hindered amine light stabilizer includes a component having a molecular weight of 500 or more.

21. The hindered amine light stabilizer according to any one of claims 18 to 20, wherein The hindered amine light stabilizer has a piperidine ring, and the piperidine ring is a secondary amine.

22. The hindered amine light stabilizer according to any one of claims 18 to 21, wherein The hindered amine light stabilizer comprises one or more compounds represented by the following general formula (1): , In the above general formula (1), R 1 represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkoxy group having 1 to 30 carbon atoms, and R 2 ~R 5 Each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a fatty acid residue having 7 to 29 carbon atoms, a group represented by the following general formula (2) or a group represented by the following general formula (3); , , In the above general formulas (2) and (3), represents a site bonded to a carbonyl group, and n represents an integer of 1 to 20.

23. The hindered amine light stabilizer according to any one of claims 18 to 22, wherein The hindered amine light stabilizer comprises: 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine condensation polymer, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine condensation polymer, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine condensation polymer, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine condensation polymer, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1 ,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 2,2,6,6-tetramethyl-4-piperidinyl ester polycondensate, 1,2,3,4-butanetetracarboxylic acid / 2,2-bis(hydroxymethyl)-1,3-propanediol / 3-hydroxy-2,2-dimethylpropanal / 1,2,2,6,6-pentamethyl-4-piperidinyl ester polycondensate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,6-bis(1,2,2,6,6-pentamethyl-4-piperidinylamino)hexane / dibromoethane polycondensate, 1,5,8,12-tetra[2,4-bis(N -butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetra[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tri[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)amino)-s-triazin-6-yl-amino]undecane, 1,6,11-tri[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino)-s-triazin-6-ylamino]decane undecane, 3,9-bis[1,1-dimethyl-2-{tris(2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[1,1-dimethyl-2-{tris(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)butylcarbonyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, 2,2,4,4-tetramethyl-7-oxa-3,20-diazabisspiro-[5.1.11.2]-heneicosane-21-one, poly{2,2,4,4-tetramethyl-7-oxa-3,20-diaza-20(2,3-epoxypropyl)bisspiro-[5.1.11.2]-heneicosane-21-one} and one or more of the compounds represented by the following general formula (5);. , In the above general formula (5), R 6 and R 7 Each independently represents an alkyl group having 1 to 30 carbon atoms or 1-(n-propoxy)-2,2,6,6-tetramethylpiperidin-4-yl group, and p represents an integer of 0 or greater.

Images