Deodorizing resin composition

Abstract

To provide a deodorant resin composition that makes it possible to make a deodorant molding having excellent deodorizing performance.SOLUTION: A deodorant resin composition comprises 10-150 pts.mass of coffee extraction residue relative to 100 pts.wt. of thermoplastic resin with a water vapor permeability of 20 cc / m2 24h / atom or more as measured at 40°C, 90% RH in accordance with JIS K7129-3: 2019.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a deodorizing resin composition. [Background technology]

[0002] In recent years, canned coffee, coffee vending machines, instant coffee, and the like have been consumed in large quantities, and a large amount of coffee extract residue has been generated at factories producing these products, major chain cafes, and the like. While this residue has often been disposed of by landfilling, incineration, and the like, the increasing volume of residue generated and growing concern about environmental issues have made such disposal methods increasingly difficult. Effective utilization of coffee extract residue has become an important issue for the future, also from the perspective of environmental issues.

[0003] Coffee extract residue has excellent heat retention, antiseptic, and insect-repellent properties, as well as unique properties as a masking agent for malodors. Attempts have been made to utilize these unique properties to develop useful materials that have not previously existed. For example, Patent Document 1 discloses a food tray made of an olefin-based resin containing natural organic matter extract residue. However, while the tray was intended for polyolefin resin, in reality it was made using used tea leaves. Furthermore, even when polyolefin resin was used, the deodorizing effect was insufficient.

[0004] On the other hand, polycarbonate resin is a thermoplastic resin with excellent impact resistance, heat resistance, paintability, etc., and is widely used in fields such as electricity, electronics, machinery, automobiles, and daily necessities. Polymer alloy compositions, in which polycarbonate resin is blended with ABS resin, are also used in a variety of fields due to their excellent moldability. Recently, there has been a strong demand for the development of polycarbonate resin into products with a variety of uses, such as interior materials with deodorizing properties, but the reality is that there is a lack of supply of highly practical products using polycarbonate resin. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-281917 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a deodorizing resin composition that can be used to prepare deodorizing molded articles having excellent deodorizing performance. [Means for solving the problem]

[0007] As a result of intensive research into solving this problem, the inventors of the present invention have found that the water vapor permeability of the thermoplastic resin used is a major factor in exerting the deodorizing performance of coffee extract residue, and that a water vapor permeability of 20 cc / m 2 We have found that a high deodorizing effect can be achieved if the concentration is 24h / atom or more, and have completed the present invention.

[0008] That is, the present invention provides a film having a water vapor transmission rate of 20 cc / m 2 measured at 40°C and 90% RH in accordance with JIS K7129-3:2019. 2 The present invention relates to a deodorizing resin composition comprising 100 parts by weight of a thermoplastic resin having a viscosity of 24h / atom or more and 10 to 150 parts by weight of coffee extraction residue.

[0009] The thermoplastic resin preferably contains 40 to 100% by mass of an aromatic polycarbonate resin and 0 to 60% by mass of a rubber-reinforced styrene-based resin.

[0010] Furthermore, it is preferable that the composition contains 5 parts by mass or less of an antioxidant (D) per 100 parts by mass of the resin component.

[0011] The antioxidant (D) is preferably a phosphorus-based antioxidant.

[0012] The present invention also relates to a deodorizing molded article made from the deodorizing resin composition.

[0013] The deodorizing molded article is preferably used for interior decoration.

[0014] Furthermore, the present invention provides a film having a water vapor transmission rate of 20 cc / m or less, measured at 40°C and 90% RH in accordance with JIS K7129-3:2019. 2 The present invention relates to a method for producing the deodorant resin composition, which comprises a step of melt-kneading 100 parts by weight of a thermoplastic resin having a moisture content of 24h / atom or more with 10 to 150 parts by weight of coffee extraction residue having a moisture content of less than 30%. [Effects of the Invention]

[0015] According to the deodorizing resin composition of the present invention, it is possible to prepare deodorizing molded articles having high deodorizing properties, which can be used for interior decoration and the like, and thus has extremely high industrial utility value. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments will be described in detail. However, more detailed explanations than necessary may be omitted. For example, detailed explanations of well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following explanation and to facilitate understanding by those skilled in the art. Note that the inventors provide the following explanation to enable those skilled in the art to fully understand the present invention, and it is not intended to limit the subject matter described in the claims.

[0017] The deodorizing resin composition of the present invention has a water vapor transmission rate of 20 cc / m as measured at 40°C and 90% RH in accordance with JIS K7129-3:2019. 2 The composition is characterized by containing 10 to 150 parts by mass of coffee extraction residue per 100 parts by weight of thermoplastic resin having a viscosity of 24h / atom or more.

[0018] The water vapor transmission rate of thermoplastic resin measured at 40°C, 90% RH, and a thickness of 25 μm in accordance with JIS K7129-3:2019 is 20 cc / m 2 24h / atom or more, but 30cc / m 2 24h / atom or more is preferable, 40cc / m 2 24h / atom or more is preferable. 20cc / m2 If the concentration is less than 24h / atom, sufficient deodorizing performance cannot be achieved.

[0019] Water vapor permeability is 20cc / m 2 Examples of thermoplastic resins with a thermal conductivity of 24 h / atom or higher include aromatic polycarbonate resin (44), styrene-based resins (polystyrene resin (30), ABS resin (33)), ethylene-vinyl alcohol copolymer (EVOH (38)), nylon 6 (47), polyacetal (47), and polymethyl methacrylate (41). In the present invention, polyacrylonitrile (6), polyethylene terephthalate (8), polyvinyl chloride (7), polytetrafluoroethylene (1), polyethylene (3), and polypropylene (2) cannot be used. The numbers in parentheses indicate the water vapor permeability. Among these, polycarbonate and styrene-based resins are preferred, and from the viewpoint of productivity, a mixture of polycarbonate resin and styrene-based resin is preferred.

[0020] Aromatic polycarbonate resins are polymers obtained by the phosgene method, in which various dihydroxydiaryl compounds are reacted with phosgene, or by the transesterification method, in which a dihydroxydiaryl compound is reacted with a carbonate ester such as diphenyl carbonate. A typical example is a polycarbonate resin produced from 2,2-bis(4-hydroxyphenyl)propane (bisphenol A).

[0021] Examples of the dihydroxydiaryl compounds include, in addition to bisphenol A, bis(hydroxyaryl)alkanes such as bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxyphenyl-3-methylphenyl)propane, 1,1-bis(4-hydroxy-3-tert-butylphenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, and 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane; dihydroxydiaryl ethers such as 4,4'-dihydroxydiphenyl ether and 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether; dihydroxydiaryl sulfides such as 4,4'-dihydroxydiphenyl sulfoxide and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide; dihydroxydiaryl sulfones such as 4,4'-dihydroxydiphenyl sulfone and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone; and the like.

[0022] These can be used alone or in combination of two or more, but those that are not substituted with halogen are preferred from the viewpoint of preventing the emission of gases containing the halogen into the environment, which is a concern during combustion. In addition to these, piperazine, dipiperidylhydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, etc. may also be used in combination.

[0023] Furthermore, the above dihydroxyaryl compounds may be used in combination with the following trivalent or higher phenolic compounds: Trivalent or higher phenolic compounds include phloroglucin, 4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptene, 2,4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptane, 1,3,5-tri-(4-hydroxyphenyl)-benzene, 1,1,1-tri-(4-hydroxyphenyl)-ethane, and 2,2-bis-[4,4-(4,4'-dihydroxydiphenyl)-cyclohexyl]-propane.

[0024] The viscosity-average molecular weight of the aromatic polycarbonate resin is not particularly limited, but is usually in the range of 10,000 to 100,000, more preferably 15,000 to 30,000, and even more preferably 17,000 to 26,000, from the viewpoints of moldability and strength. Furthermore, when producing such a polycarbonate resin, a molecular weight modifier, a catalyst, etc. may be used as needed. The viscosity-average molecular weight was measured by preparing a 0.5% by mass solution of the polycarbonate resin in methylene chloride as a solvent, measuring the specific viscosity (ηsp) at 20°C using a Cannon-Fenske viscometer, and determining the intrinsic viscosity [η] by concentration conversion, and then calculating the viscosity-average molecular weight using the following Schnell formula: [η] = 1.23 × 10-4 M0.83

[0025] Examples of styrene resins used in the present invention include acrylonitrile-butadiene-styrene copolymers (ABS resins), high-impact polystyrene resins (HIPS), methyl methacrylate-butadiene-styrene copolymers (MBS resins), etc. Preferred examples of styrene resins include those containing graft copolymers in which aromatic vinyl monomers and vinyl cyanide monomer components are graft-copolymerized in the presence of a rubber polymer, and more preferred are ABS resins produced by bulk polymerization.

[0026] The blending amount of the styrene-based resin is preferably 0 to 60% by mass, more preferably 1 to 60% by mass, and even more preferably 20 to 50% by mass, based on 100% by mass of the resin component consisting of the aromatic polycarbonate resin and the styrene-based resin. If the blending amount of the styrene-based resin is less than 1% by mass, moldability may be insufficient, and if it exceeds 60% by mass, heat resistance may be reduced.

[0027] The coffee extract residue used in the present invention is the residue remaining after coffee beans are ground into powder using a mill or other device and extracted as coffee. Because coffee extract residue contains alkaloids such as caffeine, it has high antiseptic and insecticidal properties. Furthermore, the unique odor of coffee combined with the combined effects of these components acts as a deodorizer against malodors. Examples of coffee extract residue include Tully's coffee extract residue. Because coffee extract residue contains a large amount of moisture, which may cause resin decomposition during granulation, it is used after pre-drying. There are no particular limitations on the drying method as long as it removes moisture from the coffee extract residue. However, a typical hot air circulation drying device is used, typically at a drying temperature of 140-170°C for a drying time of approximately 5-8 hours. A drying temperature of 150-160°C for a drying time of 6-7 hours is more preferred.

[0028] The moisture content of the coffee extract residue used is preferably less than 30%, more preferably less than 10%, and even more preferably less than 5%. If it is 30% or more, moldability may be insufficient. The moisture content can be measured by weighing the coffee extract residue before and after drying.

[0029] The coffee extract residue may be mixed with optional ingredients that can be treated with a polymer binder, such as wood chips or powder, calcium carbonate, talc or ceramic powder, metal powders (such as aluminum or copper) (antistatic agents), activated carbon, zeolite particles, or other functional materials.

[0030] The amount of coffee extract residue blended is 10 to 150 parts by mass, preferably 15 to 100 parts by mass, and more preferably 20 to 70 parts by mass, per 100 parts by mass of the resin component consisting of the aromatic polycarbonate resin and the styrene-based resin. If the amount is less than 10 parts by mass, the deodorizing effect may be insufficient, and if it exceeds 150 parts by mass, the moldability may be insufficient.

[0031] The deodorant resin composition of the present invention preferably contains an antioxidant. Examples of the antioxidant include phosphorus-based antioxidants and / or phenol-based antioxidants, and the composition preferably contains a phosphorus-based antioxidant. As the phosphorus-based antioxidant, a phosphite ester compound having the following phosphite ester structure is preferred, and examples thereof include compounds represented by the following general formulas (1), (2), (3), and (4).

[0032] [ka]

[0033] General formula (1): [ka] (In the formula, R 1 represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3.

[0034] In general formula (1), R 1 is an alkyl group having 1 to 20 carbon atoms, and more preferably an alkyl group having 1 to 10 carbon atoms.

[0035] Examples of the compound represented by general formula (1) include triphenyl phosphite, tricresyl phosphite, tris(2,4-di-t-butylphenyl) phosphite, trisnonylphenyl phosphite, etc. Among these, tris(2,4-di-t-butylphenyl) phosphite is particularly suitable, and is commercially available, for example, as Irgafos 168 manufactured by BASF ("Irgafos" is a registered trademark of BASF Societas Europea).

[0036] General formula (2): [ka] (In the formula, R 2 , R 3 , R 5 and R 6 R each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group. 4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms; X represents a single bond, a sulfur atom, or a group of the formula: -CHR 7 -(where R 7 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms. A represents an alkylene group having 1 to 8 carbon atoms or a group represented by the formula: *-COR 8 -(where R 8 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side. Either Y or Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.

[0037] In general formula (2), R 2 , R 3 , R 5 and R 6are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group.

[0038] Examples of alkyl groups having 1 to 8 carbon atoms include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, t-pentyl, i-octyl, t-octyl, and 2-ethylhexyl groups. Examples of cycloalkyl groups having 5 to 8 carbon atoms include cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl groups. Examples of alkylcycloalkyl groups having 6 to 12 carbon atoms include 1-methylcyclopentyl, 1-methylcyclohexyl, and 1-methyl-4-i-propylcyclohexyl groups. Examples of aralkyl groups having 7 to 12 carbon atoms include benzyl, α-methylbenzyl, and α,α-dimethylbenzyl groups.

[0039] R 2 , R 3 and R 5 are each independently preferably an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkylcycloalkyl group having 6 to 12 carbon atoms. 2 and R 5 are each independently preferably a t-alkyl group such as a t-butyl group, a t-pentyl group, or a t-octyl group, a cyclohexyl group, or a 1-methylcyclohexyl group. 3 As the alkyl group, an alkyl group having 1 to 5 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, or a t-pentyl group is preferred, and a methyl group, a t-butyl group, or a t-pentyl group is more preferred.

[0040] R 6is preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms, and more preferably a hydrogen atom, or an alkyl group having 1 to 5 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, or a t-pentyl group.

[0041] In general formula (2), R 4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms include the above-mentioned R 2 , R 3 , R 5 and R 6 In particular, the alkyl groups exemplified in the explanation of R 4 is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, more preferably a hydrogen atom or a methyl group.

[0042] In the general formula (2), X represents a single bond, a sulfur atom, or a group represented by the formula: -CHR 7 -, where the formula is -CHR 7 -R in 7 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 5 to 8 carbon atoms include the above-mentioned R 2 , R 3 , R 5 and R 6 Examples of X include the alkyl groups and cycloalkyl groups exemplified in the description of 1. In particular, X is preferably a single bond, a methylene group, or a methylene group substituted with a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, or the like, and more preferably a single bond.

[0043] In the general formula (2), A is an alkylene group having 1 to 8 carbon atoms or a group represented by the formula: *-COR 8- represents a group represented by the formula: *-COR. Examples of the alkylene group having 1 to 8 carbon atoms include a methylene group, an ethylene group, a propylene group, a butylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, and a 2,2-dimethyl-1,3-propylene group, and the like, with a propylene group being preferred. 8 -R in 8 represents a single bond or an alkylene group having 1 to 8 carbon atoms. 8 Examples of the alkylene group having 1 to 8 carbon atoms represented by R include the alkylene groups exemplified in the description of A. 8 is preferably a single bond or an ethylene group. 8 The * in - is the bond on the oxygen side, indicating that the carbonyl group is bonded to the oxygen atom of the phosphite group.

[0044] In general formula (2), one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Examples of the alkoxy group having 1 to 8 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a t-butoxy group, and a pentyloxy group. Examples of the aralkyloxy group having 7 to 12 carbon atoms include a benzyloxy group, an α-methylbenzyloxy group, and an α,α-dimethylbenzyloxy group. Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of R2, R3, R5, and R6 above.

[0045] Examples of the compound represented by general formula (2) include 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine, 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenzo[d,f][1,3,2]dioxaphosphepine, Examples include 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propoxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin, 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin, and the like. Among these, when the polycarbonate resin composition is used in a field where optical properties are particularly required, 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine is suitable, and is commercially available, for example, as Sumilizer GP ("Sumilizer" is a registered trademark) manufactured by Sumitomo Chemical Co., Ltd.

[0046] General formula (3): [ka] (In the formula, R 9 and R 10 each independently represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and b and c each independently represent an integer of 0 to 3.

[0047] Examples of the compound represented by general formula (3) include bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite, etc. Bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite is commercially available as ADK STAB PEP-36 manufactured by ADEKA CORPORATION ("ADK STAB" is a registered trademark).

[0048] General formula (4): [ka]

[0049] (In the formula, R 11 ~R 18 R each independently represents an alkyl group or alkenyl group having 1 to 3 carbon atoms. 11 and R 12 , R 13 and R 14 , R 15 and R 16 , R 17 and R 18 may be bonded to each other to form a ring. 19 ~R 22 each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. d to g each independently represents an integer of 0 to 5. X 1 ~X 4 X each independently represents a single bond or a carbon atom. 1 ~X 4 is a single bond, R 11 ~R 22 Among these, the functional group connected to the single bond is excluded from general formula (4).

[0050] A specific example of the compound represented by general formula (4) is bis(2,4-dicumylphenyl)pentaerythritol diphosphite, which is commercially available from Dover Chemical under the trade name "Doverphos (registered trademark) S-9228" and from ADEKA under the trade name "ADEKA STAB PEP-45" (bis(2,4-dicumylphenyl)pentaerythritol diphosphite).

[0051] Furthermore, instead of or in addition to any of the compounds represented by the general formulas (1) to (4), a compound represented by the following general formula (5) may be used.

[0052] General formula (5): [ka] (In the formula, R 23 ~R 26 represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group.

[0053] Specific examples of the compound represented by general formula (5) include, for example, [1,1'-biphenyl]-4,4-diylbis[bis(2,4-di-t-butylphenoxy)phosphine], and the like, which are commercially available, for example, as Irgafos P-EPQ (trade name) manufactured by BASF and Sandstab P-EPQ (trade name) manufactured by Clariant Japan Co., Ltd.

[0054] The amount of antioxidant is preferably 5 parts by mass or less, more preferably 1 part by mass or less, and even more preferably 0.02 to 0.8 parts by mass, per 100 parts by mass of the resin component consisting of the aromatic polycarbonate resin and the styrene-based resin. If the amount of antioxidant exceeds 5 parts by mass, impact strength may decrease. If the amount of antioxidant is less than 0.02 parts by mass, the effect of improving color may be insufficient.

[0055] Furthermore, the resin composition according to the present invention may contain a phenolic antioxidant in place of or in addition to the phosphorus-based antioxidant.

[0056] Examples of the phenol-based antioxidant include compounds represented by the following general formula (6).

[0057] General formula (6): [ka] (In General Formula 6, R 23 represents an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group.

[0058] Other phenolic antioxidants include α-tocopherol, butylhydroxytoluene, sinapyl alcohol, vitamin E, 2-tert-butyl-6-(3'-tert-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenylacrylate, 2,6-di-tert-butyl-4-(N,N-dimethylaminomethyl)phenol, 3,5-di-tert-butyl-4-hydroxybenzylphosphonate diethyl ester, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 2,2'-methyl ethylenebis(4-ethyl-6-tert-butylphenol), 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-methyl-6-cyclohexylphenol), 2,2'-dimethylene-bis(6-α-methyl-benzyl-p-cresol) 2,2'-ethylidene-bis(4,6-di-tert-butylphenol), 2,2'-butylidene-bis(4-methyl-6-tert-butylphenol), 4,4'-butylidenebis(3-methyl-6-tert-butylphenol), triethylene Diethylene glycol-N-bis-3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, 1,6-hexanediol bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], bis[2-tert-butyl-4-methyl 6-(3-tert-butyl-5-methyl-2-hydroxybenzyl)phenyl]terephthalate, 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1,-dimethylethyl}-2,4,8 ,10-Tetraoxaspiro[5,5]undecane, 4,4'-thiobis(6-tert-butyl-m-cresol), 4,4'-thiobis(3-methyl-6-tert-butylphenol), 2,2'-thiobis(4-methyl-6-tert-butylphenol), bis(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, 4,4'-di-thiobis(2,6-di-tert-butylphenol), 4,4'-tri-thiobis(2,6-di-tert-butylphenol), 2,2-thiodiethylenebis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,4-bis(n-octylthio)-6-(4-hydroxy-3',5'-di-tert-butylanilino)-1,3,5-triazine, N,N'-hexamethylenebis-(3,5-di-tert-butyl-4-hydroxyhydrocinnamide), N,N'-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine, 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl- Examples of suitable antioxidants include 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)benzene, tris(3,5-di-tert-butyl-4-hydroxyphenyl)isocyanurate, tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-2[3(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxy]ethyl isocyanurate, and tetrakis[methylene-3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate]methane. All of these are readily available. The above phenolic antioxidants can be used alone or in combination of two or more.

[0059] Among these, n-octadecyl-3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate, which is a compound represented by the above general formula (6), is suitable, and is commercially available, for example, from ADEKA Corporation under the trade name "ADEKA STAB AO-50."

[0060] The amount of the phenolic antioxidant is preferably 0.5 parts by mass or less per 100 parts by mass of the resin component consisting of the aromatic polycarbonate resin and the styrene resin.

[0061] The deodorizing resin composition of the present invention may contain additives other than the above-mentioned components, such as a heat stabilizer, a colorant, a release agent, a softener, an antistatic agent, an impact modifier, an ultraviolet absorber, a pigment, a filler, and a flow improver, within the range that does not impair the effect.

[0062] The deodorizing resin composition of the present invention can be used to produce deodorizing molded articles by injection molding or extrusion molding. Applications of the deodorizing molded articles are not particularly limited, and examples include interior applications, deodorizers for pets, and deodorizers for indoor and toilet use. Furthermore, pellets before injection molding or extrusion molding can also be used for the aforementioned applications.

[0063] The method for producing the deodorant resin composition of the present invention is a method for producing a deodorant resin composition having a water vapor transmission rate of 20 cc / m or less as measured at 40°C and 90% RH in accordance with JIS K7129-3:2019. 2 The method is characterized by including a step of melt-kneading 100 parts by weight of a thermoplastic resin having a moisture content of 24h / atom or more with 10 to 150 parts by weight of coffee extraction residue having a moisture content of less than 30%.

[0064] The method for blending the various components used in the present invention is not particularly limited, and they can be mixed in any mixer, such as a tumbler, ribbon blender, or high-speed mixer, and then easily melt-kneaded in a conventional single-screw or twin-screw extruder. There is also no particular limitation on the order in which they are blended.

[0065] The coffee extract residue used contains a large amount of moisture. If the moisture content exceeds 30%, the moisture content is reduced in advance using a mixer dryer, hot air circulation dryer, box dryer, or the like before melt-kneading. The moisture content is preferably 10% or less, and more preferably 5% or less. If the moisture content exceeds 30%, molding processability decreases and granulation becomes impossible. [Example]

[0066] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, "parts" and "%" are based on mass.

[0067] The following raw materials were used: 1. Polycarbonate resin: Water vapor permeability 50cc / m 2 24h / atom Polycarbonate resin synthesized from bisphenol A and phosgene (SD Polycarbonate 200-20 manufactured by Sumika Polycarbonate Co., Ltd., hereafter abbreviated as PC) 2. Rubber-reinforced styrene resin: Water vapor permeability 40cc / m 2 24h / atom Bulk polymerization ABS resin (Santac AT-05 manufactured by Nippon A&L Co., Ltd., hereafter abbreviated as ABS) 3. Polypropylene resin: Water vapor permeability 2cc / m 2 24h / atm (BC03C (product name) manufactured by Japan Polypropylene Corporation, hereafter abbreviated as PP) 4. Coffee extraction residue (Tully's coffee extraction residue, hereafter referred to as deodorizer) 5. Phosphorus-based antioxidant (E): Tris(2,4-di-t-butylphenyl)phosphite, represented by the following formula:

[0068] [ka] (BASF Irgafos 168 (trade name), hereafter abbreviated as (B1))

[0069] Examples 1 to 5 and Comparative Examples 1 to 2 The various ingredients were mixed in a tumbler according to the ingredients and ratios shown in Table 1, and then melt-kneaded at a cylinder temperature of 210°C using a 37mm diameter twin-screw extruder (TEM37SS manufactured by Shibaura Machine Co., Ltd.) to obtain various pellets. Evaluations were performed using the methods described below. The evaluation results are shown in Table 1.

[0070] The pellets were dried in a hot air circulating shelf oven at 90°C for at least 4 hours, and then pressed into plates measuring 100 mm in length, 100 mm in width, and 1 mm in thickness at 240°C using a press machine manufactured by Shinto Metal Industries Co., Ltd., and deodorization tests were conducted.

[0071] <Deodorizing test> In accordance with ISO 17299, a deodorizing test using ammonia was conducted using the method shown below. Test method: 10g of pellet-shaped sample was placed in a 5 liter Tedlar bag, 3 liters of gas of the specified concentration was injected, and the concentration was measured every time with a gas detector tube. If the ammonia concentration after 24 hours is less than 40%, it shows good deodorizing properties.

[0072] <Productivity> During the process from melt-kneading in a twin-screw extruder to pelletization, the state of the strand emerging from the tip of the extruder was visually inspected and evaluated according to the following criteria. ◯: The strands are stable and pellets can be made. △: Although strands were occasionally disturbed or broken, pellets could be produced. ×: Strands are frequently disordered or broken, making it difficult to prepare pellets.

[0073] [Table 1]

[0074] As shown in Table 1, it was confirmed that the deodorizing resin compositions of Examples 1 to 5 had a high deodorizing effect against ammonia and excellent productivity. On the other hand, the deodorizing resin compositions of Comparative Examples 1 and 2 had almost no deodorizing effect, although productivity was satisfactory. [Industrial Applicability]

[0075] The deodorizing resin composition of the present invention makes it possible to prepare deodorizing molded articles having excellent deodorizing performance, and is therefore of extremely high industrial utility value.

Claims

1. The water vapor transmission rate measured at 40°C and 90% RH in accordance with JIS K7129-3:2019 is 20cc / m ２ A deodorizing resin composition containing 10 to 150 parts by mass of coffee extract residue per 100 parts by weight of a thermoplastic resin having a viscosity of 24 h / atom or more, The thermoplastic resin comprises 40 to 100% by mass of an aromatic polycarbonate resin and 0 to 60% by mass of a styrene-based resin.

2. 2. The deodorizing resin composition according to claim 1, further comprising 5 parts by mass or less of an antioxidant (D) per 100 parts by mass of the resin component.

3. 3. The deodorizing resin composition according to claim 2, wherein the antioxidant (D) is a phosphorus-based antioxidant.

4. A deodorizing molded article comprising the deodorizing resin composition according to any one of claims 1 to 3.

5. The deodorizing molded article according to claim 4, which is used for interior decoration.

6. The water vapor transmission rate measured at 40°C and 90% RH in accordance with JIS K7129-3:2019 is 20cc / m ２ A method for producing a deodorant resin composition according to any one of claims 1 to 3, comprising a step of melt-kneading 10 to 150 parts by mass of coffee extraction residue having a moisture content of less than 30% with 100 parts by weight of a thermoplastic resin having a viscosity of 24 h / atom or more.

Images