Plasticizer for cellulose-based resin, cellulose-based resin composition containing the same, and molded product thereof

Abstract

To provide a plasticizer for a cellulose-based resin, which is excellent in compatibility with the cellulose-based resin, a cellulose-based resin composition containing the same, and a molded product thereof.SOLUTION: A plasticizer for a cellulose-based resin is a diester of a dibasic acid formed by using one or more kinds selected from a group consisting of dibasic acids having 4 to 14 carbon atoms and one or more kinds selected from a group of alcohols represented by formula (1) as reaction raw materials. An alcohol of n=4 is contained in an amount of 1 mass% or more and 100 mass% or less in the alcohol of the reaction raw material. In formula (1), n represents an integer of 1 to 40.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a plasticizer for a cellulose-based resin, a cellulose-based resin composition containing the same (hereinafter also simply referred to as a "resin composition"), and a molded article thereof. [Background technology]

[0002] Various synthetic resins are available and are used for various purposes, particularly for various parts and housings of home appliances and automobiles, as well as for parts such as housings of office equipment and electronic and electrical equipment.

[0003] In recent years, plant-derived resins have been attracting attention because of their carbon neutrality, and in particular, cellulose-based resins such as cellulose esters have been attracting attention.

[0004] These cellulose-based resins are characterized by their toughness, glossiness, transparency, oil resistance, and weather resistance, but when heated alone, they melt and simultaneously discolor and decompose, making it difficult to obtain good molded products. Therefore, plasticizers have been used during processing to improve processability, i.e., fluidity.

[0005] As a plasticizer for such cellulose-based resins, Patent Document 1 discloses triacetin, which is a glycerin ester-based plasticizer.

[0006] Furthermore, Patent Document 2 discloses ester oligomers such as an ester of diethylene glycol monomethyl ether and adipic acid, and an ester of triethylene glycol monomethyl ether and adipic acid. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] International Publication No. 2016 / 135778 [Patent Document 2] JP 2016-30797 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, conventional plasticizers have a problem in terms of compatibility with cellulose-based resins.

[0009] Accordingly, an object of the present invention is to provide a plasticizer for cellulose-based resins having excellent compatibility with cellulose-based resins, a cellulose-based resin composition containing the same, and a molded article thereof. [Means for solving the problem]

[0010] Means for Solving the Problems The present inventors conducted intensive research to solve the above problems, and as a result, discovered that a plasticizer for cellulose-based resins using a specific dibasic acid and a specific alcohol can solve the above problems, thereby completing the present invention.

[0011] That is, the plasticizer for cellulose-based resins of the present invention is a diester of a dibasic acid, which is made from reaction raw materials consisting of one or more selected from a group of dibasic acids having 4 to 14 carbon atoms and one or more selected from a group of alcohols represented by the following general formula (1), and is characterized in that the alcohol raw material contains an alcohol where n=4 in an amount of 1 mass % or more and 100 mass % or less.

[0012] TIFF2025027882000001.tif15170In general formula (1), n ​​represents an integer of 1 to 40.

[0013] In the plasticizer for cellulose resin of the present invention, the dibasic acid having 4 to 14 carbon atoms is preferably at least one selected from the group consisting of succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, and dodecanedioic acid.

[0014] The cellulose-based resin composition of the present invention is characterized by containing the plasticizer for cellulose-based resins of the present invention and a cellulose-based resin.

[0015] The molded article of the present invention is characterized by being made of the cellulose resin composition of the present invention. Effect of the Invention

[0016] According to the present invention, it is possible to provide a plasticizer for cellulose-based resins having excellent compatibility with cellulose-based resins, a cellulose-based resin composition containing the same, and a molded article thereof. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described in detail.

[0018] [Plasticizers for cellulose-based resins] First, the plasticizer for cellulose resins of the present invention will be described. The plasticizer for cellulose-based resin of the present invention is a diester of a dibasic acid produced by reacting one or more dibasic acids having 4 to 14 carbon atoms with one or more alcohols represented by the following general formula (1) as reaction raw materials, and contains an alcohol with n=4 in an amount of 1 mass % or more and 100 mass % or less in the alcohol raw material.

[0019] TIFF2025027882000002.tif15170In general formula (1), n ​​represents an integer of 1 to 40.

[0020] Here, the term "reaction raw materials" refers to raw materials that constitute a diester of a dibasic acid, which is the plasticizer for cellulose-based resins of the present invention, and does not include solvents or catalysts that do not constitute a diester of a dibasic acid.

[0021] From the viewpoints of compatibility with the cellulose-based resin, resistance to volatility, and improving the processability (fluidity) of the cellulose-based resin, the dibasic acid having 4 to 14 carbon atoms is preferably a dicarboxylic acid having 4 to 14 carbon atoms, more preferably an aliphatic dicarboxylic acid having 4 to 14 carbon atoms, even more preferably an alkylene dicarboxylic acid having 4 to 14 carbon atoms, and even more preferably an alkylene dicarboxylic acid having 6 to 12 carbon atoms.

[0022] Specific examples of dibasic acids having 4 to 14 carbon atoms include succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid (dodecanedioic acid), cyclohexanedicarboxylic acid, hexahydrophthalic acid, etc. From the viewpoints of compatibility with cellulose-based resins, volatility resistance, and improvement of processability (fluidity) of cellulose-based resins, among these, succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, and dodecanedioic acid are preferred, adipic acid, azelaic acid, sebacic acid, and dodecanedioic acid are more preferred, adipic acid and sebacic acid are even more preferred, and adipic acid is particularly preferred.

[0023] The dibasic acid having 4 to 14 carbon atoms, which is the reaction raw material for the plasticizer for cellulose resin of the present invention, may be used alone or in combination of two or more kinds.

[0024] In the alcohol represented by the above general formula (1), n ​​in general formula (1) is an integer of 1 to 40. From the viewpoints of compatibility with cellulose-based resins, resistance to volatility, and improvement of processability (fluidity) of the cellulose-based resins, n in general formula (1) is preferably an integer of 2 to 15, more preferably an integer of 3 to 13, even more preferably an integer of 3 to 7, and particularly preferably an integer of 3 to 5.

[0025] The plasticizer for cellulose resins of the present invention contains 1% by mass or more and 100% by mass or less of an alcohol in which n = 4 in the alcohol represented by general formula (1) which is a reaction raw material. That is, the plasticizer for cellulose resins of the present invention contains 1% by mass or more and 100% by mass or less of tetraethylene glycol monomethyl ether in the alcohol which is a reaction raw material.

[0026] The content of tetraethylene glycol monomethyl ether, which is an alcohol with n=4, is 1% by mass or more and 100% by mass or less when the total amount of alcohol in the reaction raw material is 100% by mass. The lower limit is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, even more preferably 30% by mass or more, even more preferably 35% by mass or more, even more preferably 40% by mass or more, even more preferably 45% by mass or more, and particularly preferably 50% by mass or more, from the viewpoints of compatibility with cellulose resin, volatility resistance, and improvement of processability (fluidity) of cellulose resin. The upper limit is preferably 95% by mass or less, more preferably 90% by mass or less, from the viewpoints of compatibility with cellulose resin, volatility resistance, and improvement of processability (fluidity) of cellulose resin.

[0027] Examples of the alcohol represented by the general formula (1) include ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether, pentaethylene glycol monomethyl ether, hexaethylene glycol monomethyl ether, heptaethylene glycol monomethyl ether, octaethylene glycol monomethyl ether, nonaethylene glycol monomethyl ether, decaethylene glycol monomethyl ether, undecaethylene glycol monomethyl ether, dodecaethylene glycol monomethyl ether, tridecaethylene glycol monomethyl ether, tetradecaethylene glycol monomethyl ether, pentadecaethylene glycol monomethyl ether, hexadecaethylene glycol monomethyl ether, heptadecaethylene glycol monomethyl ether, octadecaethylene glycol monomethyl ether, nonadecaethylene glycol monomethyl ether, icosaethylene glycol monomethyl ether, and henicosaethylene glycol monomethyl ether. Examples of the monomethyl ether include docosaethylene glycol monomethyl ether, tricosaethylene glycol monomethyl ether, tetracosaethylene glycol monomethyl ether, pentacosaethylene glycol monomethyl ether, hexacosaethylene glycol monomethyl ether, heptacosaethylene glycol monomethyl ether, octacosaethylene glycol monomethyl ether, nonacosaethylene glycol monomethyl ether, triacontaethylene glycol monomethyl ether, hentriacontaethylene glycol monomethyl ether, dotriacontaethylene glycol monomethyl ether, tritriacontaethylene glycol monomethyl ether, tetratriacontaethylene glycol monomethyl ether, pentatriacontaethylene glycol monomethyl ether, hexatriacontaethylene glycol monomethyl ether, heptatriacontaethylene glycol monomethyl ether, octatriacontaethylene glycol monomethyl ether, nonatriacontaethylene glycol monomethyl ether, and tetratriacontaethylene glycol monomethyl ether.Among these, as reaction raw materials other than tetraethylene glycol monomethyl ether which is an alcohol with n = 4, preferable alcohols include triethylene glycol monomethyl ether, pentaethylene glycol monomethyl ether, hexaethylene glycol monomethyl ether, and heptaethylene glycol monomethyl ether. More preferable alcohols include triethylene glycol monomethyl ether and pentaethylene glycol monomethyl ether.

[0028] The alcohol represented by the general formula (1) which is a reaction raw material of the plasticizer for the cellulose resin of the present invention may be used alone or in combination of two or more.

[0029] From the viewpoints of compatibility with the cellulose resin, volatility resistance, and improvement of the processability (fluidity) of the cellulose resin, the number average molecular weight of the plasticizer for the cellulose resin of the present invention is preferably 450 to 2000, more preferably 480 to 1500, and even more preferably 520 to 1000. Examples of the measurement method of the number average molecular weight include a measurement method by GPC (gel permeation chromatography). The measurement method is shown below.

[0030] <Measurement Method of Number Average Molecular Weight by GPC> A sample is prepared by dissolving 50 mg of the sample in 10 mL of tetrahydrofuran (THF). Using a semi-micro GPC column (SHODEX KF-402.5 manufactured by Showa Denko KK), the peak is analyzed by splitting with a differential refractive index detector, and the average molecular weight is calculated in terms of polystyrene conversion.

[0031] The method for producing the plasticizer for cellulose resin of the present invention is not particularly limited, and a known method for producing an ester compound can be used. That is, one or more selected from the group of dibasic acids having 4 to 14 carbon atoms and one or more selected from the group of alcohols represented by the above general formula (1) may be subjected to an esterification reaction. A catalyst may be used in the esterification reaction. Pressurization or depressurization may be performed during the reaction, and the reaction temperature during the esterification reaction is preferably 150 to 250°C, more preferably 180 to 230°C.

[0032] Examples of esterification catalysts that can be used in the production of the plasticizer for cellulose-based resins of the present invention include acid catalysts such as sulfuric acid, phosphoric acid, zinc chloride, benzenesulfonic acid, p-toluenesulfonic acid, and 4-chlorobenzenesulfonic acid; alkoxy titanium compounds such as tetramethoxy titanium, tetraethoxy titanium, and tetraisopropoxy titanium (tetraisopropyl titanate); titanium acylate compounds such as polyhydroxy titanium stearate and polyisopropoxy titanium stearate; titanium chelate compounds such as titanium acetyl acetate, triethanolamine titanate, titanium ammonium lactate, titanium ethyl lactate, and titanium octylene glycolate; tin compounds such as dibutyltin dilaurate, dibutyltin oxide, and dibutyltin diacetate; metal acetates such as magnesium acetate, calcium acetate, and zinc acetate; and metal oxides such as antimony oxide and zirconium oxide. These may be used alone or in combination.

[0033] The plasticizer for cellulose resins of the present invention is preferably blended with a cellulose resin such as a cellulose ester and used as a cellulose resin composition.

[0034] [Cellulose-based resin composition] Next, the cellulose resin composition of the present invention will be described. The cellulose-based resin composition of the present invention contains the plasticizer for cellulose-based resin of the present invention and a cellulose-based resin.

[0035] The amount of the plasticizer for cellulose resins of the present invention to be blended with a cellulose resin is preferably 0.1 to 100 parts by mass, more preferably 1 to 70 parts by mass, and even more preferably 5 to 50 parts by mass, per 100 parts by mass of the cellulose resin, from the viewpoints of compatibility with the cellulose resin, resistance to volatility, and improvement of the processability (fluidity) of the cellulose resin.

[0036] In the cellulose-based resin composition of the present invention, the cellulose-based resin is preferably a cellulose ester, and examples of the cellulose ester include cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and polycaprolactone-grafted cellulose acetate. The cellulose-based resin may be esterified with a long-chain fatty acid. From the viewpoint of improving compatibility and processability (fluidity), the cellulose-based resin is preferably a cellulose in which at least one of the hydroxyl groups of cellulose is substituted with an acetyl group. The cellulose-based resin may be used alone or in combination of two or more kinds.

[0037] The cellulose resin may be a commercially available product. Examples of commercially available cellulose esters include cellulose diacetates such as "L-20" (trade name: manufactured by Daicel Corporation, average acetyl substitution degree 2.41, average polymerization degree 145), "L-30" (trade name, manufactured by Daicel Corporation, average acetyl substitution degree 2.41, average polymerization degree 160), "L-50" (trade name, manufactured by Daicel Corporation, average acetyl substitution degree 2.41, average polymerization degree 180), and "L-70" (trade name, manufactured by Daicel Corporation, average acetyl substitution degree 2.41, average polymerization degree 190), and cellulose triacetates such as "LT-35" (trade name: manufactured by Daicel Corporation, average acetyl substitution degree 2.87, average polymerization degree 270). Other commercially available cellulose esters include Eastman Chemical Company's Eastman TM Eastman, CA TM CAP, Eastman TM CAB. These commercially available products may be used alone or in combination of two or more.

[0038] In addition to the plasticizer for cellulose resins, an impact improver such as a rubber additive may be used in the cellulose resin composition of the present invention for the purpose of improving impact strength.

[0039] Examples of such rubber additives include silicone acrylic rubbers such as Metablen S-2001 (product name: manufactured by Mitsubishi Rayon Co., Ltd.) and Metablen SRA-200 (same as above), acrylic rubbers such as Metablen W-450A (same as above) and Metablen W-300A (same as above), and styrene butadiene rubbers such as Metablen C-223A (same as above), Metablen C-323A (same as above), Metablen C-303A (same as above), and Metablen C-215A (same as above).

[0040] In addition to the above, various additives can be used in the cellulose resin composition of the present invention, so long as the effects of the present invention are not impaired.

[0041] Examples of such additives include known additives such as plasticizers other than the plasticizer for cellulose resin of the present invention, flame retardants, flame retardant assistants, compatibilizers, antioxidants (e.g., hindered phenols, phosphorus, amines, sulfur, etc.), ultraviolet absorbers, foam stabilizers, defoamers, abrasive grains, fillers, pigments, dyes, colorants, thickeners, surfactants, lubricants, antistatic agents, heat stabilizers, tackifiers, catalysts, fillers (inorganic, organic), silane coupling agents, waxes, processing aids, antibacterial agents, and fungicides. In addition, known plastic resins, curable resins, etc. can be appropriately selected and used as blend resins as necessary within the scope of not impairing the object of the present invention. The above additives are merely examples, and the type and amount of use are not particularly limited as long as they do not impair the effects of the present invention.

[0042] The cellulose-based resin composition of the present invention can be obtained as a mixed powder of the cellulose-based resin composition by stirring and mixing the plasticizer for cellulose-based resins of the present invention, a cellulose-based resin, and, if necessary, other components, using a stirrer such as a mortar mixer, a Henschel mixer, a Banbury mixer, or a ribbon blender.

[0043] In addition, the cellulose-based resin composition of the present invention can also be obtained as a pellet-shaped cellulose-based resin composition by melt-molding the plasticizer for cellulose-based resin of the present invention, a cellulose-based resin, and, if necessary, other components, using a kneader such as a conical twin-screw extruder, a parallel twin-screw extruder, a single-screw extruder, a co-kneader-type kneader, or a roll kneader.

[0044] The cellulose-based resin composition of the present invention can be used for a wide range of applications, such as parts (interior and exterior parts) for electric and electronic devices (home appliances, office automation (OA) devices, media-related devices, optical devices, communication devices, etc.), parts (interior and exterior parts) for various vehicles such as automobiles, passenger aircraft, and ships, interior materials, exterior materials, and housings for office equipment and electronic and electrical devices, and is particularly useful as interior and exterior materials (particularly housings) for electric and electronic devices such as copiers, multifunction machines, printers, personal computers, and televisions.

[0045] [Molded body] Next, the molded article of the present invention will be described. The molded article of the present invention is made of the cellulose resin composition of the present invention and is obtained from the cellulose resin composition of the present invention. Specifically, the molded article of the present invention can be obtained by molding the cellulose resin composition of the present invention in a blended powder form or pellet form into a desired shape by melt molding using a conventionally known method such as vacuum molding, compression molding, extrusion molding, injection molding, calendar molding, press molding, blow molding, powder molding, etc.

[0046] The shape of the molded product is not particularly limited, but examples thereof include a rod shape, a sheet shape, a film shape, a plate shape, a cylinder shape, a circle shape, an ellipse shape, a star shape, a polygon shape, and the like.

[0047] The cellulose-based resin composition of the present invention and a molded article thereof can be used in a wide range of industrial fields, such as electricity, electronics, and communications, agriculture, forestry, fisheries, mining, construction, food, textiles, clothing, medicine, coal, petroleum, rubber, leather, automobiles, precision instruments, wood, building materials, civil engineering, furniture, printing, and musical instruments.

[0048] More specifically, the cellulose resin composition of the present invention and its molded article are used in applications such as office and office automation equipment, such as printers, personal computers, word processors, keyboards, PDAs (personal digital assistants), telephones, copiers, facsimiles, ECRs (electronic cash registers), calculators, electronic organizers, cards, holders, and stationery; home appliances, such as washing machines, refrigerators, vacuum cleaners, microwave ovens, lighting equipment, game consoles, irons, and kotatsu; AV equipment, such as TVs, VTRs, video cameras, radio cassette players, tape recorders, minidiscs, CD players, speakers, and liquid crystal displays; electric and electronic parts and communication equipment, such as connectors, relays, capacitors, switches, printed circuit boards, coil bobbins, semiconductor encapsulating materials, LED encapsulating materials, electric wires, cables, transformers, deflection yokes, distribution boards, and clocks; interior and exterior materials for automobiles, plate-making films, adhesive films, bottles, food containers, food packaging films, plastic wrap films for pharmaceuticals and medicines, product packaging films, agricultural films, agricultural sheets, and greenhouse films.

[0049] The cellulose resin composition of the present invention and its molded article can be used in a wide variety of applications, including seats (padding, outer material, etc.), belts, ceiling coverings, convertible tops, armrests, door trims, rear package trays, carpets, mats, sun visors, wheel covers, mattress covers, airbags, insulating materials, hanging handles, hanging handle straps, wire covering materials, electrical insulating materials, paints, coating materials, covering materials, flooring materials, corner walls, carpets, wallpaper, wall covering materials, exterior materials, interior materials, roofing materials, deck materials, wall materials, pillar materials, flooring boards, and fences. The material can also be used for a variety of purposes, including materials for automobiles, vehicles, ships, aircraft, buildings, houses, and construction materials and civil engineering materials, such as materials for frames and moldings, window and door shapes, shingles, paneling, terraces, balconies, soundproofing boards, heat insulating boards, and window materials, as well as clothing, curtains, sheets, nonwoven fabrics, plywood, synthetic fiber boards, carpets, entrance mats, partition curtains, sheets, buckets, hoses, powder transport hoses, containers, glasses, bags, cases, goggles, skis, rackets, tents, musical instruments, and other daily necessities and sporting goods. EXAMPLES

[0050] The present invention will be described in more detail below using examples, but the present invention is not limited to these.

[0051] First, a plasticizer for cellulose resins according to the present invention was produced according to the following production example.

[0052] <Production of plasticizer for cellulose-based resin> [Production Example 1] Plasticizers for cellulose-based resins were produced using the dibasic acids and alcohols shown in Table 1 as reaction raw materials. The content of each alcohol in the reaction raw material alcohol is shown in mass %. The production was carried out by carrying out an esterification reaction at 200 to 230°C under normal pressure or reduced pressure using tetraisopropyl titanate as a catalyst, to obtain plasticizer-1 for cellulose-based resins of the present invention.

[0053] [Production Examples 2 to 8] In the same manner as in Production Example 1, plasticizers-2 to -8 for cellulose resins of the present invention were obtained.

[0054] [Comparative Manufacturing Examples 1 to 4] Comparative plasticizers were produced using the dibasic acids and alcohols listed in Table 1 as reaction raw materials. The content of each alcohol in the reaction raw material alcohol is shown in mass %. The production was carried out by carrying out an esterification reaction at 200 to 230°C under normal pressure or reduced pressure using tetraisopropyl titanate as a catalyst, to obtain comparative plasticizers-1 to -4.

[0055] [Examples 1 to 10, Comparative Examples 1 to 5] Cellulose ester (product name L-50, manufactured by Daicel Corporation) was dissolved in a mixed solvent consisting of 92 parts by mass of methylene chloride and 8 parts by mass of methyl alcohol while stirring to obtain a solution with a concentration of 7% by mass. The cellulose resin plasticizers-1 to -8 shown in Table 1 were mixed with the solution in the amounts (% by mass) shown in Tables 2 and 3, respectively, and the solution was cast on a petri dish to form a film with a thickness of about 80 μm, to prepare a test film for each example. The following tests were performed using the obtained test film. The results are shown in Tables 2 and 3.

[0056] In addition, comparative plasticizers 1 to 5 were used as comparative plasticizers. Comparative plasticizers 1 to 4 were obtained in the above comparative production examples, and triacetin was used for comparative plasticizer 5. Test films for each comparative example were prepared in the same manner as in the examples, and the following tests were carried out. The results are shown in Table 3.

[0057] <Compatibility test> The haze value of the test film obtained above was measured in accordance with ISO13468 (D65). The smaller the haze value, the better the transparency and the better the compatibility with the cellulose-based resin. The following criteria were used for the evaluation.

[0058] (Evaluation Criteria) ⊚: Haze value is 0.5 or less. Good: Haze value is greater than 0.5 and less than 1.0. △: Haze value is greater than 1.0 and less than 2.0. ×: Haze value exceeds 2.0.

[0059] <Volatility resistance test> The volatility resistance was evaluated using a differential thermal-thermogravimetric simultaneous analyzer (TG-DTA, manufactured by Rigaku Corporation, model: TG8120). The test film obtained above was cut into several mg pieces so as to fit into an aluminum pan (inner diameter 5 mm), and the mass loss (volatilization loss) was measured when the film was held at 210°C for 20 minutes under N2 conditions (200 mL / min) at a heating rate of 10.0°C / min, using alumina as the reference substance, to evaluate the volatility resistance. The smaller the mass loss (volatilization loss), the better the volatility resistance. The following criteria were used for the evaluation.

[0060] (Evaluation Criteria) ⊚: Volatile loss is less than 3.0%. ○: Volatile loss is 3.0% or more and less than 5.0%. △: The volatile loss is 5.0% or more and less than 7.0%. ×: The volatile loss is 7.0% or more.

[0061] [Table 1]

[0062] [Table 2]

[0063] [Table 3]

[0064] *1: Cellulose ester (product name L-50, manufactured by Daicel Corporation)

[0065] From the results shown in Tables 1 to 3, it is clear that the plasticizer for cellulose resin of the present invention has excellent compatibility with cellulose resin and excellent volatility resistance. It is also clear that the cellulose resin composition of the present invention has excellent compatibility and volatility resistance, and can provide a molded article having excellent these properties.

Claims

1. A plasticizer for a cellulose-based resin, which is a diester of a dibasic acid, is prepared by reacting one or more dibasic acids having 4 to 14 carbon atoms with one or more alcohols represented by the following general formula (1): A plasticizer for cellulose-based resins, comprising an alcohol having n=4 in an amount of 1% by mass or more and 100% by mass or less in the alcohol as a reaction raw material. In the general formula (1), n ​​represents an integer of 1 to 40.

2. 2. The plasticizer for cellulose-based resins according to claim 1, wherein the dibasic acid having 4 to 14 carbon atoms is at least one selected from the group consisting of succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid and dodecanedioic acid.

3. 3. A cellulose resin composition comprising the plasticizer for cellulose resins according to claim 1 or 2 and a cellulose resin.

4. A molded article comprising the cellulose resin composition according to claim 3.

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