Oil-resistant composition, oil-resistant paper

Abstract

This invention relates to an oil-resistant composition comprising a wax (A) which requires a synthetic wax (A1) and an emulsifier (B) having an HLB value of 8 to 16, wherein, by weight of nonvolatile content, the oil-resistant composition contains 55% to 98% by weight of wax (A) per 100% by weight, and contains less than 50% by weight of resin (C) per 100 parts by weight of wax (A), the emulsifier (B) is not a component of resin (C), the emulsifier (B) comprises a nonionic emulsifier (B1) and / or an anionic emulsifier (B2), and the resin (C) comprises one or more selected from the group consisting of polyurethane resin, epoxy resin, styrene resin, poly(meth)acrylamide resin and polyvinyl alcohol resin, and to oil-resistant paper containing this oil-resistant composition.

Description

Technical Field

[0001] The present invention relates to an oil-resistant agent composition and oil-resistant paper.

Background Art

[0002] Oil-resistant paper is widely used as wrapping paper for cooked foods containing a large amount of oil and moisture such as fried chicken, hamburgers, and grilled fish, foods containing a large amount of fats and oils such as chocolate, paper linings for packaging containers and food trays, wrapping paper for desiccants and deoxidizers, bags for pet food, heavy bags for flour, paper for building materials, etc. Also, a chemical that imparts oil resistance to paper is called an oil-resistant agent.

[0003] Conventionally, fluororesin-based ones have been used as oil-resistant agents. For example, after adding a fluororesin-based oil-resistant agent to a pulp slurry, it is then formed by papermaking, or it is applied to the surface of a paper base material or impregnated into the paper base material, etc. However, the oil-resistant paper obtained by using such an oil-resistant agent may generate perfluorinated compounds when heated, which is not preferable from the aspect of environmental load, and in recent years, an oil-resistant agent that does not contain a fluorine-based resin (non-fluororesin-based oil-resistant agent) has been demanded.

[0004] As such technology of an oil-resistant agent, for example, an invention of an aqueous oil-resistant agent containing an olefin-based resin and / or a urethane-based resin, and paraffin wax is known (Patent Document 1), and it has excellent oil resistance at normal temperature (hereinafter referred to as normal temperature oil resistance) when made into oil-resistant paper. However, the oil-resistant paper is inferior in oil resistance after being exposed to a high-temperature environment (hereinafter referred to as high-temperature oil resistance), and furthermore, the aqueous oil-resistant agent itself is also inferior in mechanical stability.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention aims to provide an oil-resistant paper that exhibits excellent oil resistance at room temperature and high temperatures, and further provides an oil-resistant composition with excellent mechanical stability. [Means for solving the problem]

[0007] The inventors, after diligent research, have found a solution to the aforementioned problems and have completed the present invention. Specifically, the present invention relates to the following oil-resistant composition and oil-resistant paper.

[0008] 1. An oil-resistant composition comprising a wax (A) which requires a synthetic wax (A1) and an emulsifier (B) having an HLB value of 8 to 16, In terms of non-volatile content by weight, the oil-resistant composition contains 55% to 98% by weight of wax (A) in 100% by weight, The mixture contains less than 50% by weight of resin (C) per 100 parts by weight of wax (A), Emulsifier (B) is not a resin (C), Emulsifier (B) comprises a nonionic emulsifier (B1) and / or anionic emulsifier (B2), An oil-resistant composition comprising resin (C) selected from the group consisting of polyurethane resin, epoxy resin, styrene resin, poly(meth)acrylamide resin, and polyvinyl alcohol resin.

[0009] 2. The oil-resistant composition according to item 1 above, wherein the wax (A) further comprises a natural wax (A2).

[0010] 3. Oil-resistant paper containing the oil-resistant composition described in item 1 or 2 above. [Effects of the Invention]

[0011] The oil-resistant composition of the present invention provides oil-resistant paper with excellent oil resistance at room temperature and high temperature, and also exhibits excellent mechanical stability. [Modes for carrying out the invention]

[0012] The oil-resistant composition of the present invention comprises a wax (A) and an emulsifier (B), with synthetic wax (A1) being essential.

[0013] <About Wax (A)> Wax (A) is generally an organic substance that is solid at room temperature and becomes liquid when heated, and has a melting point above 35°C. Wax (A) is divided into synthetic waxes and natural waxes. Note that the above description does not exclude waxes (A) that are liquid at room temperature; such waxes can also be used.

[0014] <About synthetic wax (A1)> Synthetic wax (A1) is synthesized by chemical methods, microbiological methods, enzymatic methods, etc. The inclusion of synthetic wax (A1) makes the oil-resistant composition more likely to exhibit excellent mechanical stability and room-temperature oil resistance.

[0015] Regarding the physical properties of the synthetic wax (A1), the melting point is preferably 50 to 100°C, more preferably 60 to 97°C, even more preferably 72.5 to 95°C, particularly preferably 75 to 90°C, and even more particularly preferably 85 to 90°C, in order to easily achieve excellent mechanical stability, room temperature oil resistance, and high temperature oil resistance in the oil-resistant composition.

[0016] For example, synthetic wax (A1) is: Polyolefin waxes obtained by polymerizing olefins (e.g., polymethylene wax, polyethylene wax, polypropylene wax, etc.); Decomposed polyolefin wax obtained by decomposing the aforementioned polyolefin wax; Fischer-Tropsch wax produced by the synthesis of carbon monoxide and hydrogen in the presence of a metal catalyst (e.g., iron, cobalt, etc.); Acid waxes obtained by oxidation of the aforementioned polyolefin wax or Fischer-Tropsch wax, or by polymerization of an olefin with an ethylenically unsaturated carboxylic acid (for example, polymerization of ethylene with acrylic acid); An ester wax obtained by reacting the acid wax with an alcohol or by polymerization of an olefin and an ethylenically unsaturated ester (for example, polymerization of ethylene and vinyl acetate), etc.; An oxo synthesis (reacting an alkene such as ethylene with carbon monoxide and hydrogen) alcohol wax; Examples include amide wax obtained by reacting the acid wax with an amine, etc.

[0017] Also, as the synthetic wax (A1), those obtained by chemically modifying the natural wax (A2) described later (for example, oxidized paraffin wax, chlorinated paraffin wax, acid wax of oxidized paraffin wax, alcohol wax, amide wax, oxidized montan wax, acid wax of montan wax, ester wax, etc.) are also included.

[0018] These synthetic waxes (A1) may be used alone or in combination of two or more. Among them, Fischer - Tropsch wax is preferable because the oil - resistant agent composition is likely to have excellent oil resistance at room temperature.

[0019] The wax (A) preferably contains a natural wax (A2) because the oil - resistant agent composition is likely to exhibit excellent mechanical stability.

[0020] The natural wax (A2) refers to waxes existing in nature and can be classified into animal - based waxes, plant - based waxes, petroleum - based waxes, and mineral - based waxes.

[0021] As the physical properties of the natural wax (A2), from the point that the oil - resistant agent composition is likely to exhibit excellent mechanical stability, the melting point is preferably 50 - 90 °C, more preferably 60 - 85 °C, and still more preferably 70 - 85 °C.

[0022] Examples of animal - based waxes include beeswax, whale wax, carnauba wax, lanolin, shellac wax, etc.

[0023] Examples of plant-based waxes include wood wax, white wax, palm oil, olive oil, carnauba wax, candelilla wax, rice wax, sugar wax, bayberry wax, ocury wax, esparto wax, and jojoba oil.

[0024] Examples of petroleum-based waxes include paraffin wax, microcrystalline wax, slack wax, and petrolatum.

[0025] Examples of mineral-based waxes include montan wax, ceresin, and ozokerite.

[0026] Furthermore, examples of natural wax (A2) include refined waxes obtained by refining the aforementioned natural wax (A2) (for example, refined paraffin wax, macrowax, microcrystalline wax, etc.).

[0027] These natural waxes (A2) may be used individually or in combination of two or more. Among them, plant-based waxes, petroleum-based waxes, and refined petroleum-based waxes are preferred because the oil-resistant composition tends to exhibit excellent mechanical stability, with carnauba wax, rice wax, paraffin wax, and refined paraffin wax being more preferred, and carnauba wax and rice wax being particularly preferred.

[0028] In the present invention, wax (A) is contained in an amount of 55% to 98% by weight of nonvolatile content in 100% by weight of the oil-resistant composition. If wax (A) is contained in an amount of less than 55% by weight, the oil resistance at room temperature tends to be poor. If wax (A) is contained in an amount exceeding 98% by weight, emulsification becomes difficult because wax (A) does not mix well with emulsifier (B). Furthermore, even if an oil-resistant composition is obtained, it becomes difficult to exhibit oil resistance at room temperature. In addition, from the viewpoint that the oil-resistant composition tends to exhibit excellent oil resistance at room temperature and high temperature, it is preferable that wax (A) is contained in an amount of 60% to 95% by weight, more preferably 70% to 90% by weight, and even more preferably 80% to 90% by weight in 100% by weight of the oil-resistant composition.

[0029] When synthetic wax (A1) and natural wax (A2) are used in combination, the preferred content ratio, in terms of weight of nonvolatile content, is synthetic wax (A1) / natural wax (A2) = 5 / 95 to 95 / 5, more preferably 15 / 85 to 85 / 15, and even more preferably 30 / 70 to 75 / 25, as this allows the oil-resistant composition to exhibit excellent mechanical stability.

[0030] <About emulsifier (B)> Emulsifier (B) has an HLB value of 8 to 16. The HLB value is a measure of the hydrophilic-lipophilic balance and represents the degree of affinity of emulsifier (B) to water and oil. The HLB value of emulsifier (B) in this invention is a calculated value using the Griffin method or the Davis method.

[0031] The Griffin method is used to determine the HLB value of the nonionic emulsifier (B1), which will be described later. Depending on the structure, it is calculated using, for example, the following formula.

[0032] (1) In the case of esters between polyols and fatty acids HLB = 20(1 - S / A) (S: saponification value of ester, A: acid value of fatty acid)

[0033] (2) When the molecule contains polyoxyethylene chains HLB = (E + P) / 5 (E: weight %) of polyoxyethylene chain, P: weight %) of polyol-derived structure (3) When the hydrophilic group consists only of a polyoxyethylene chain HLB = E / 5 (E: weight %) of polyoxyethylene chain

[0034] The Davis method is used to determine the HLB value of the anionic emulsifier (B2), which will be described later, and is calculated using the following formula.

[0035] HLB = 7 + (Sum of hydrophilic groups) - (Number of lipophilic groups) × (Number of lipophilic groups)

[0036] In the preceding paragraph, the number of hydrophilic groups and lipophilic groups can be determined by the values ​​shown in Table 1, depending on the structure.

[0037] [Table 1]

[0038] If the HLB value of emulsifier (B) is less than 8, the wax (A) and emulsifier (B) will not mix well, and the emulsifying properties will tend to be poor. Similarly, if the HLB value of emulsifier (B) exceeds 16, the emulsifying properties will tend to be poor, and even if an oil-resistant composition is obtained, the mechanical stability will tend to be poor. For the same reasons, the HLB value of emulsifier (B) is preferably 9 to 15, more preferably 10 to 14, and even more preferably 10.5 to 12.5.

[0039] Furthermore, regarding other physical properties of emulsifier (B), for example, it is preferable that the molecular weight is 200 to 2500, more preferably 300 to 1200, and even more preferably 400 to 800, in order to facilitate emulsification between wax (A) and emulsifier (B) and to ensure that the oil-resistant composition exhibits excellent mechanical stability. Here, molecular weight refers to the sum of the atomic weights of all atoms constituting emulsifier (B).

[0040] Furthermore, the emulsifier (B) includes a nonionic emulsifier (B1) and / or an anionic emulsifier (B2). The use of this emulsifier makes it easier for the oil-resistant composition to exhibit excellent mechanical stability.

[0041] Examples of nonionic emulsifiers include polyoxyalkylene ethers such as polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, and polyoxyalkylene styrylphenyl ethers; polyoxyalkylene esters such as polyoxyalkylene alkyl esters, polyoxyethylene alkenyl esters, and polyoxyalkylene sorbitan alkyl esters; condensation products of alkylene oxides and aliphatic amines; and ethylene oxide-propylene oxide polymers. These may be used individually or in combination of two or more.

[0042] Examples of anionic emulsifiers include polyoxyalkylene sulfates such as polyoxyalkylene alkyl sulfates and polyoxyalkylene alkylphenyl ether sulfates; alkyl sulfonates such as alkyl sulfonates, alkylphenyl ether sulfonates, alkyldiphenyl ether sulfonates, and alkylbenzene sulfonates; alkyl sulfosuccinates such as alkyl sulfosuccinates and polyalkyl sulfosuccinates; polyoxyalkylene sulfosuccinates such as polyoxyalkylene alkyl sulfosuccinates, polyoxyalkylene phenyl ether sulfosuccinates, polyoxyalkylene alkylphenyl ether sulfosuccinates, and polyoxyalkylene styrylphenyl ether sulfosuccinates; phosphate ester salts of higher alcohols, formaldehyde condensates of naphthalene sulfonates, aqueous solutions of alkali metal hydroxides (such as aqueous sodium hydroxide solution and aqueous potassium hydroxide solution), and neutralized salts of saturated carboxylic acids. These may be used individually or in combination of two or more.

[0043] Examples of saturated carboxylic acids used in the neutralization salts of saturated carboxylic acids include saturated monocarboxylic acids such as formic acid, acetic acid, propionic acid, 2-methylpropionic acid, butanoic acid, 3-methylbutanoic acid, pentanoic acid, 4-methylpentanoic acid, hexanoic acid, 2-methylhexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid (lauric acid), tridecanoic acid, tetradecanoic acid (myristic acid), pentadecanoic acid, hexadecanoic acid (palmitic acid), heptadecanoic acid, octadecanoic acid (stearic acid), and isostearyl acid; Examples include saturated dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, enanthic acid, suberic acid, azelaic acid, sebacic acid, and dodecanediic acid. These can be used individually or in combination of two or more.

[0044] Examples of salts include alkali metal salts such as sodium and potassium; and ammonium salts. Examples of neutralizing agents used in saturated carboxylic acid neutralization salts include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; inorganic amines such as ammonia and ammonium carbonate; alkylamines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, n-propylamine, and n-butylamine; alkanolamines such as monomethanolamine, monoethanolamine, mono-n-propanolamine, dimethanolamine, diethanolamine, di-n-propanolamine, trimethanolamine, and triethanolamine; cycloalkylamines such as cyclohexylamine; and aromatic amines such as aniline. These can be used individually or in combination of two or more. Furthermore, saturated carboxylic acid neutralization salts can be used as fully neutralized or partially neutralized salts.

[0045] In the above paragraph, examples of oxyalkylene groups include oxyethylene group, oxypropylene group, oxyisoprene group, and oxybutylene group. Examples of alkyl groups include n-hexyl group, isohexyl group, n-heptyl group, n-octyl group, isooctyl group, 2-ethylhexyl group, n-decyl group, isodecyl group, n-undecyl group, n-dodecyl group (lauryl group), n-tridecyl group, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group, and n-octadecyl group. Furthermore, examples of alkenyl groups include vinyl group, allyl group (2-propenyl group), 1-propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group (oleyl group), nonadecenyl group, and icocenyl group. In addition, examples of salts include sodium salt, potassium salt, and ammonium salt.

[0046] In particular, nonionic emulsifier (B1) is preferred from the viewpoint of its emulsifying compatibility with wax (A) and the excellent mechanical stability of the oil-resistant composition, polyoxyalkylene ethers are more preferred, and polyoxyethylene alkyl ethers are even more preferred.

[0047] The amount of emulsifier (B) is preferably 2% to 40% by weight, more preferably 5% to 30% by weight, and even more preferably 8% to 25% by weight, based on the weight of nonvolatile content, in the oil-resistant composition, considering that it blends well with wax (A) to facilitate emulsification, and the resulting oil-resistant composition easily achieves both excellent mechanical stability, oil resistance at room temperature, and oil resistance at high temperatures.

[0048] <About resin (C)> The oil-resistant composition of the present invention contains less than 50% by weight of a resin (C) having a weight-average molecular weight of 10,000 to 2,500,000 per 100 parts by weight of wax (A).

[0049] When the weight-average molecular weight of resin (C) is between 10,000 and 2,500,000, it readily blends with the oil-resistant composition and exhibits excellent mechanical stability. For the same reason, the weight-average molecular weight of resin (C) is preferably between 100,000 and 2,000,000, and more preferably between 300,000 and 1,500,000. Here, the weight-average molecular weight refers to the value obtained by gel permeation chromatography (GPC).

[0050] When resin (C) is included in an amount of 50% by weight or less of wax (A) by non-volatile content, the oil-resistant composition tends to exhibit excellent oil resistance at room temperature and high temperature. In addition to the above reasons, the oil-resistant composition also tends to exhibit excellent mechanical stability, therefore, it is preferable that resin (C) be included in an amount of 40% by weight or less, more preferably 30% by weight or less, and even more preferably 20% by weight or less, per 100 parts by weight of wax (A).

[0051] The resin (C) of the present invention comprises one or more selected from the group consisting of polyurethane resin, epoxy resin, styrene resin, poly(meth)acrylamide resin, and polyvinyl alcohol resin. When these resins (C) are used, the oil-resistant composition tends to exhibit excellent mechanical stability, oil resistance at room temperature, and oil resistance at high temperatures. The resin (C) is preferably water-based because it is compatible with resin (A) and emulsifier (B), and its forms include emulsion and solution. In the following, "(meth)acrylic" means methacrylic and / or acrylic, and "(meth)acrylate" means methacrylate and / or acrylate (the same applies hereinafter).

[0052] Polyurethane resins are a general term for resins having two or more urethane groups in their molecules, and examples include polymers that use polyols, polyisocyanates, and chain extenders as reactive components.

[0053] Regarding the types, amounts, and manufacturing methods of the aforementioned reaction components, for example, those described in Japanese Patent Publication No. 2022-188338, Japanese Patent Publication No. 2023-033381, Japanese Patent Publication No. 2024-047625, etc., may be applied.

[0054] Epoxy resins are a general term for compounds having two or more epoxy groups in their molecule, and include, for example, novolac-type epoxy resins such as phenol novolac-type epoxy resins and cresol novolac-type epoxy resins; bisphenol-type epoxy resins such as bisphenol A-type epoxy resins, bisphenol F-type epoxy resins, bisphenol S-type epoxy resins, hydrogenated bisphenol A-type epoxy resins, and hydrogenated bisphenol F-type epoxy resins; polyphenol alkane-type epoxy resins such as triphenolmethane-type epoxy resins and alkyl-modified triphenolmethane-type epoxy resins; alicyclic epoxy resins such as dicyclopentadienephenol-type epoxy resins; and ether-type epoxy resins (glycerin, neopentyl glycol, ethylene glycol, propylene glycol, butylene glycol, 1,5-pentanediol, 1,6-hexanediol). Examples include: reaction products of polyols such as polyethylene glycol, polypropylene glycol, hydroquinone, naphthol, trihydroxybiphenyl, bisresorcinol, bisxylenol, binaphthol, trihydroxyphenylmethane, and tetrahydroxyphenylethane with epichlorohydrin; ester-type epoxy resins (reaction products of polycarboxylic acids such as phthalic acid, methylphthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, trimellitic acid, and / or polymerized fatty acids with epichlorohydrin); ether-ester-type epoxy resins (reaction products of hydroxycarboxylic acids such as p-oxyphthalic acid and β-oxynaphthophthalic acid with epichlorohydrin); epoxidized polyolefins, epoxidized polybutadienes, epoxidized soybean oil, aliphatic epoxy resins, and modified products of these epoxy resins.

[0055] Regarding the types, amounts, and manufacturing methods of the reactive components that form the modified epoxy resin, for example, those described in Japanese Patent Publication No. 2019-137862, Japanese Patent Publication No. 2023-034823, etc., can be applied.

[0056] Styrene resin is a polymer that uses styrenes as essential reactive components.

[0057] Examples of styrenes include styrene, α-methylstyrene, t-butylstyrene, dimethylstyrene, acetoxystyrene, hydroxystyrene, vinyltoluene, and chlorovinyltoluene. These may be used individually or in combination of two or more.

[0058] Regarding the types of monomer components other than styrenes, the amount of each monomer component including styrenes used, and the manufacturing method, for example, those described in Japanese Patent Publication No. 9-324394 and Japanese Patent Publication No. 2000-045196 can be applied.

[0059] Examples of resin types include styrenes and styrene-maleic acid resins, styrene-maleic anhydride resins, and styrene-acrylic resins, which are polymerized using styrenes and (meth)acrylate alkyl esters as essential reaction components.

[0060] Poly(meth)acrylamide resin is a polymer that has (meth)acrylamide (i.e., methacrylamide, acrylamide, or a combination thereof) as an essential reactive component. However, polymers containing styrenes as the reactive component belong to the category of styrene resin and not to the category of poly(meth)acrylamide resin.

[0061] Regarding the types of monomer components other than (meth)acrylamide, the amount of each monomer component including (meth)acrylamide used, and the manufacturing method, for example, those described in Japanese Patent Publication No. 2000-045196, Japanese Patent Publication No. 9-105098, etc., can be applied.

[0062] Polyvinyl alcohol resins are obtained, for example, by saponifying the acetyl groups of polyvinyl acetate and substituting them with hydroxyl groups. Depending on the degree of saponification, they are classified into fully saponified, intermediately saponified, and partially saponified types. Polyvinyl alcohol resins having functional groups such as carboxyl groups, sulfo groups, amino groups, and acetoacetyl groups can also be used.

[0063] Examples of polyvinyl alcohol resin forms include granules and fine powders.

[0064] Furthermore, commercially available polyvinyl alcohol resin may be used. Examples of commercially available products include the "Kuraray Poval series," "Exceval series," "ELVANOL series," and "Mobiflex series" (all manufactured by Kuraray Co., Ltd.); the "Gosenol series," "Gosenex series," and "Nichigo G Polymer series" (all manufactured by Mitsubishi Chemical Corporation); the "Poval JC series," "Poval JF series," "Poval JM series," "Poval JT series," "Poval JP series," "Poval JL series," "Poval JR series," "J-Poval JC series," "J-Poval JF series," "J-Poval JM series," "J-Poval JT series," "J-Poval JP series," "J-Poval JL series," and "J-Poval JR series" (all manufactured by Nippon Vinegar Poval Co., Ltd.). These may be used individually or in combination of two or more types.

[0065] Pigments, water-retaining agents, defoaming agents, preservatives, leveling agents, colorants, anti-blocking agents, antioxidants, UV absorbers, thickeners, dispersion stabilizers, fillers, etc., may be added to the polyvinyl alcohol resin during or after the reaction.

[0066] Among these resins (C), it is preferable that one or more are selected from the group consisting of polyurethane resin, styrene resin, poly(meth)acrylamide resin, and polyvinyl alcohol resin, as the oil-resistant composition tends to exhibit excellent mechanical stability. More preferably, one or more are selected from the group consisting of styrene-maleic anhydride resin, styrene-acrylic resin, poly(meth)acrylamide resin, and polyvinyl alcohol resin.

[0067] Regarding the ionic properties of resin (C), nonionic and anionic properties are preferred, with anionic properties being more preferred, because they readily mix with wax (A) and emulsifier (B), and the resulting oil-resistant composition tends to exhibit excellent mechanical stability.

[0068] The oil-resistant composition of the present invention is obtained by mixing a wax (A), an emulsifier (B), and optionally a resin (C) and a solvent. Mixing conditions include, for example, a temperature of typically 20 to 100°C, preferably 40 to 100°C, and a time of typically 10 minutes to 24 hours, preferably 30 minutes to 12 hours. Furthermore, the mixing order and method of each component are not particularly limited; for example, the wax (A), emulsifier (B), and solvent may be emulsified beforehand to form an emulsion, and then the resin (C) may be mixed in as needed. Additionally, each of the above components may be added as appropriate during or after production.

[0069] Water is preferred as the solvent to reduce environmental impact, but hydrophilic organic solvents may also be used in combination.

[0070] Examples of hydrophilic organic solvents include alcohols such as methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, t-butyl alcohol, isobutyl alcohol, n-hexyl alcohol, n-octyl alcohol, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, and diacetone alcohol; and ethers such as ethylene glycol monobutyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether. These may be used individually or in combination of two or more. The hydrophilic organic solvent content is preferably less than 10% by weight.

[0071] The oil-resistant composition of the present invention may further contain additives such as pigments, water-retaining agents, defoaming agents, antioxidants, preservatives, leveling agents, and colorants.

[0072] The physical properties of the oil-resistant composition include a non-volatile content concentration of typically 20-60% by weight, and preferably 25-35% by weight from the viewpoint of emulsification.

[0073] The oil-resistant paper of the present invention contains the aforementioned oil-resistant composition.

[0074] The oil-resistant paper can be obtained, for example, by adding the oil-resistant composition of the present invention to a pulp slurry, forming the paper, and drying it, or by coating at least one side of a base paper with the oil-resistant composition of the present invention and drying it.

[0075] Examples of pulp slurry or base paper types include chemical pulps such as hardwood pulp (LBKP) and softwood pulp (NBKP); mechanical pulps such as wood pulp (GP), refiner ground pulp (RGP), and thermomechanical pulp (TMP); pulps treated with DIP or mercerization, and recycled paper pulp. More specifically, examples include bleached kraft paper, unbleached kraft paper, fine paper, medium paper, lightly coated paper, coated paper, processed base paper, cardboard, white cardboard, liner, semi-glassine paper, glassine paper, and parchment paper. Furthermore, the pulp or base paper may contain or have added pH adjusters such as aluminum sulfate, sulfuric acid, or sodium hydroxide; fillers such as talc, clay, kaolin, titanium dioxide, or calcium carbonate; and the resin (C) of the present invention (for example, polyurethane resin, poly(meth)acrylamide resin, styrene resin, polyvinyl alcohol resin, etc.).

[0076] When adding the oil-resistant composition to a pulp slurry, the amount used is preferably 0.5 to 5 parts by weight, and more preferably 1 to 3 parts by weight, based on the weight of nonvolatile content, per 100 parts by weight of pulp.

[0077] Methods for forming the pulp slurry after addition include pouring the pulp slurry onto a papermaking wire mesh or mold while dewatering or squeezing it. When a mold is used, it may be formed using various known methods, such as dry molding, wet molding, injection molding, and foam molding.

[0078] When coating the surface of the base paper, the application methods for the oil-resistant composition include, for example, bar coaters, knife coaters, size press coaters, roll coaters, reverse roll coaters, curtain coaters, gravure coaters, air knife coaters, calenders, gate roll coaters, blade coaters, two-roll size presses, and rod metering. The application amount of the coating liquid (calculated in terms of non-volatile content) is typically 0.1 to 10 g / m². 2 To a certain extent, preferably 1 to 6 g / m 2 It is to that extent.

[0079] The oil-resistant paper obtained by each of the above methods is dried with heat. Examples of heat sources include hot air dryers, infrared heaters, and rotary dryers. The drying conditions are, for example, a temperature of 70 to 220°C, preferably 100 to 200°C, and a drying time of 1 to 10 minutes, preferably 4 to 5 minutes. Drying can be carried out under normal pressure, under pressure, or under reduced pressure. [Examples]

[0080] The present invention will be described below with reference to examples, but the present invention is not limited thereto. In the examples and comparative examples, "parts" and "%" are based on weight unless otherwise specified.

[0081] Manufacturing Example 1 In a reaction vessel equipped with a stirrer, thermometer, condenser, and nitrogen gas inlet, 38.1 parts of dimethylolbutanoic acid, 314.5 parts of polyoxytetramethylene-polyoxypropylene glycol (product name: "Polyserine DCB-2000", number average molecular weight 2000, manufactured by NOF Corporation), 128.9 parts of isophorone diisocyanate, 12.7 parts of 2-hydroxyethyl acrylate, and 256.1 parts of stearyl methacrylate were charged and reacted at 85°C under a nitrogen stream for 5 hours to obtain 750.3 parts of urethane prepolymer. Next, while stirring an aqueous solution consisting of 1208 parts of deionized water, 225.0 parts of isopropyl alcohol, 26.6 parts of triethylamine, and 27.8 parts of dihydrazide adipate was added to the urethane prepolymer and reacted at 50°C for 3 hours. Next, 5.0 parts of 2,2'-azobis(methyl isobutyrate) (trade name: "V-601", manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) were added and the mixture was reacted at 80°C for 3 hours. A predetermined amount of deionized water was added to achieve a non-volatile content of 35% to obtain an aqueous solution of polyurethane resin (C-1).

[0082] Manufacturing Example 2 In a reaction vessel similar to that used in Production Example 1, 59.4 parts of dimethylolbutanoic acid, 489.9 parts of polytetramethylene glycol (product name: "PTMG1000", number average molecular weight 1000, manufactured by Mitsubishi Chemical Corporation), and 275.5 parts of isophorone diisocyanate were charged, and the reaction was carried out at 85°C under a nitrogen stream for 5 hours to obtain 824 parts of urethane prepolymer. Next, while stirring an aqueous solution consisting of 1340 parts of deionized water, 225 parts of isopropyl alcohol, 40.5 parts of triethylamine, and 43.3 parts of adipic acid dihydrazide, the urethane prepolymer was added and the reaction was carried out at 50°C for 3 hours. Deionized water was then added to obtain an aqueous solution of polyurethane resin (C-2) to a non-volatile content concentration of 35%.

[0083] Manufacturing Example 3 In a reaction vessel similar to that used in Production Example 1, 200 parts of t-butyl cellosolve, 300 parts of bisphenol A type epoxy resin (product name: "Epotote YD-014", epoxy equivalent: 950 g / eq, manufactured by Nippon Steel Chemical & Material Co., Ltd.), and 6 parts of glycidyl methacrylate were charged and dissolved at 120°C under a nitrogen stream. Then, 9.4 parts of diethanolamine and 36.2 parts of stearylamine were added and the mixture was reacted for 7 hours. Next, a mixture consisting of 15.0 parts of acrylic acid, 10.0 parts of styrene, 10.0 parts of methyl acrylate, and 4 parts of t-butyl peroxy-2-ethylhexanoate was charged into a dropping funnel and added dropwise to the reaction system over 1 hour, and the mixture was kept warm for 3 hours. After cooling to 80°C, 19 parts of triethylamine and 560 parts of deionized water were added in sequence and mixed to obtain a modified epoxy resin (C-3) with a non-volatile content of 33%.

[0084] Manufacturing Example 4 In a reaction vessel similar to that used in Production Example 1, 83.4 parts (40 mol%) of styrene, 31.7 parts (10 mol%) of isopropyl alcohol half-ester of maleic anhydride, 77.5 parts (45 mol%) of methacrylic acid, 12.8 parts (5 mol%) of butyl acrylate, 69.8 parts of isopropyl alcohol, 69.8 parts of water, and 8.2 parts of 2,2'-azobisisobutyronitrile were charged and reacted at 80-85°C for 5 hours with stirring under a nitrogen atmosphere. Then, ion-exchanged water and 74.4 parts of 28% aqueous ammonia (corresponding to a degree of neutralization of 135% of free carboxyl groups) were added to obtain an aqueous solution of styrene-maleic anhydride resin (C-4) with a non-volatile content of 20%.

[0085] Manufacturing Example 5 In a reaction vessel similar to that in Production Example 1, equipped with a stirrer, thermometer, condenser, nitrogen gas inlet tube, and two dropping funnels, 300 parts of deionized water were added while introducing nitrogen, and the temperature was raised to 80°C while stirring. Then, a mixture of 15 parts styrene, 15 parts methyl methacrylate, 30 parts methacrylic acid, 15 parts sodium styrene sulfonate, 25 parts polyoxyethylene alkylphenyl ether-based reactive emulsifier (product name: "Aqualon RN-20", manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (non-volatile content), 5 parts alpha styrene dimer, and 25 parts deionized water was charged into dropping funnel (1), and a mixture of 3 parts potassium persulfate and 60 parts deionized water was charged into dropping funnel (2). Both mixtures were added dropwise over 3 hours and then reacted for 2 hours. After cooling, 29 parts of a 48% sodium hydroxide aqueous solution (neutralized to 100 mol% relative to methacrylic acid) were added, and deionized water was added to obtain an aqueous solution of styrene-methacrylic resin (C-5) to a non-volatile content of 20%.

[0086] Manufacturing Example 6 In a reaction vessel similar to that used in Production Example 1, 170.5 parts acrylamide, 830 parts deionized water, and 9 parts 80% acrylic acid were charged. After adjusting the pH to 4-5 with sulfuric acid, the mixture was heated to 60°C while stirring under a nitrogen atmosphere. 0.21 parts ammonium persulfate and 0.09 parts sodium bisulfite were added, and the mixture was reacted at 85°C for 2 hours. Deionized water was then added to achieve a non-volatile content of 10.3% to obtain an aqueous solution of polyacrylamide resin (C-6).

[0087] Manufacturing example 7 In a reaction vessel similar to that used in Production Example 1, 91.9 parts of acrylamide, 7 parts of itaconic acid, 1.1 parts of sodium methallyl sulfonate, and 297.5 parts of deionized water were charged and heated to 45°C under a nitrogen atmosphere with stirring. 2.5 parts of 10% ammonium persulfate aqueous solution were added to this solution, and the reaction was allowed to proceed for 2 hours after the solution temperature reached 90°C. After cooling, 4.5 parts of 48% sodium hydroxide aqueous solution were added, and deionized water was added to achieve a non-volatile content of 25% to obtain an aqueous solution of polyacrylamide resin (C-7).

[0088] Manufacturing Example 8 In a reaction vessel similar to that used in Production Example 1, 170.5 parts of acrylamide, 830 parts of deionized water, and 9 parts of 80% acrylic acid were charged. After adjusting the pH to 4-5 with sulfuric acid, the mixture was heated to 60°C while stirring under a nitrogen atmosphere. 0.31 parts of ammonium persulfate and 0.09 parts of sodium bisulfite were added to this solution, and the mixture was reacted at 85°C for 2 hours. Deionized water was then added to achieve a non-volatile content of 10.3% to obtain an aqueous solution of polyacrylamide resin (C-8).

[0089] Manufacturing Example 9 In a reactor equipped with a stirrer, reflux condenser, and nitrogen inlet, 69.3 parts acrylamide, 10.8 parts acrylic acid, 19.9 parts acrylonitrile, 2.5 parts isopropyl alcohol, and 394.8 parts deionized water were added, and the mixture was heated to 40°C while stirring under a nitrogen atmosphere. To this solution, 1.5 parts of 10% ammonium persulfate aqueous solution and 1.2 parts of 10% sodium bisulfite aqueous solution were added. After the liquid temperature reached 90°C due to exothermic reaction, the mixture was reacted for 2 hours. After cooling, 4.6 parts of 28% ammonia aqueous solution were added, and deionized water was added to achieve a non-volatile content of 20% to obtain an aqueous solution of polyacrylamide resin (C-9).

[0090] As resin (C), the polyvinyl alcohol resins used were "JP-45" (C-10) and "JP-03" (C-11) (both manufactured by Nippon Vi-Poval Co., Ltd.).

[0091] Comparative Manufacturing Example 1 In a reaction apparatus equipped with a stirrer, thermometer, reflux condenser, nitrogen gas inlet tube, and three dropping funnels, 276.5 parts of deionized water were added, oxygen was removed from the reaction system by passing nitrogen gas through it, and the mixture was heated to 90°C. 77.4 parts of acrylamide, 22.0 parts of N,N-dimethylaminoethyl methacrylate, 7.5 parts of itaconic acid, 1.85 parts of sodium methallyl sulfonate, 28.7 parts of 62.5% sulfuric acid, 0.23 parts of N,N-dimethylacrylamide, 0.36 parts of N,N'-methylenebisacrylamide, and 218.9 parts of deionized water were charged into dropping funnel (1), and the pH was adjusted to approximately 3.0 with sulfuric acid (monomer mixture (I)). Next, 223.9 parts of acrylamide, 22.0 parts of N,N-dimethylaminoethyl methacrylate, 7.5 parts of itaconic acid, 1.85 parts of sodium methallyl sulfonate, 0.23 parts of N,N-dimethylacrylamide, 0.36 parts of N,N'-methylenebisacrylamide, and 466.6 parts of deionized water were charged into dropping funnel (2), and the pH was adjusted to around 3.0 with sulfuric acid (monomer mixture (II)). 0.6 parts of ammonium persulfate and 180 parts of deionized water were charged into dropping funnel (3). Then, the ammonium persulfate aqueous solution was added dropwise from dropping funnel (3) over approximately 3 hours. In parallel, monomer mixtures (I) and (II) from dropping funnels (1) and (2) were added dropwise in that order at a constant flow rate over approximately 3 hours. After the dropwise addition was complete, 0.4 parts of ammonium persulfate and 10 parts of deionized water were added and the mixture was kept warm for 1 hour. Then, 580 parts of deionized water were added to obtain an aqueous solution of polyacrylamide resin (C'-1) with a non-volatile content of 20.0%.

[0092] <Weight-average molecular weight of resin (C)> The weight-average molecular weight of resin (C) was measured by gel permeation chromatography (GPC) under the following measurement conditions. The results are shown in Table 4. (Measurement conditions) Columns: Tosoh Corporation Guard Column PWXL (1) and GMPWXL (2) Eluent: Phosphate buffer (0.05 mol / L phosphoric acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) + 0.13 mol / L sodium dihydrogen phosphate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) aqueous solution, pH approximately 2.5) Flow rate: 0.8ml / min Temperature: 40℃ RI detector: Shodex RI-101, manufactured by Showa Denko K.K. MALS detector: WYATT DAWN HELEOS-II Measurement sample: The resin (C) was diluted with the above eluent to a non-volatile content concentration of 0.1% and then measured.

[0093] Example 1 In a reaction vessel equipped with a stirrer, thermometer, condenser, nitrogen gas inlet tube, and dropping funnel, 100 parts (non-volatile content) of Fischer-Tropsch wax (trade name: "KH FT 80", melting point: 80°C, manufactured by China Oil Refining Co., Ltd.) and 10 parts (non-volatile content) of emulsifier (B-1) (polyoxyethylene alkyl ether, trade name: "Newcol 2305", molecular weight: 436, HLB=10.9, manufactured by Nippon Emulsifier Co., Ltd.) were charged and melted at over 90°C. After adding 27.5 parts of deionized water dropwise from the dropping funnel, 10 parts (non-volatile content) of aqueous polyurethane resin (C-1) and 252.5 parts of deionized water were added. The mixture was emulsified using a high-pressure emulsifier to obtain an oil-resistant composition with a non-volatile content of 30%.

[0094] <Confirmation of the effect of wax (A)> Examples 2-17, Comparative Examples 1-3 The same procedure as in Example 1 was followed by changing the wax composition and / or amount used as shown in Table 1 to obtain oil-resistant compositions with a non-volatile content of 30%.

[0095] (mechanical stability) 50 g of the oil-resistant composition of Example 1 was weighed into a container of a Marlon-type stability tester (manufactured by Shinsei Sangyo Co., Ltd.), and after 5 minutes of vigorous stirring at a temperature of 25°C, a load of 10 kg, and a rotation speed of 1000 r.pm, the resulting aggregates were filtered through a 350 mesh wire mesh, and the value was calculated according to Formula 1. The same procedure was followed for the oil-resistant compositions of Examples 2 to 17 and Comparative Examples 1 to 3. The results are shown in Table 2. (Formula 1) Mechanical stability (%) = (Dry weight of aggregates / Dry weight of oil-resistant composition) × 100

[0096] (Preparation of oil-resistant paper) Unbleached coniferous kraft paper (L-BKP) was beaten to prepare a pulp slurry with a degree of beating (CSF) of 300 ml (non-volatile content: 0.4%). To the non-volatile content of the pulp slurry, 3% of the oil-resistant agent composition of Example 1 and 0.5% of aluminum sulfate were added sequentially. After dewatering to obtain wet paper, oil-resistant paper was produced by hot-press drying (400 kgf load, 180°C × 2 min). Oil-resistant paper was also produced using the oil-resistant agent compositions of Examples 2-17 and Comparative Examples 1-3 in the same manner.

[0097] (Oil resistance at room temperature) 0.1g of commercially available olive oil was dropped onto the prepared oil-resistant paper and left to stand at room temperature (20-23°C). The time until an oil stain was observed on the reverse side was measured. The results are shown in Table 2.

[0098] (High temperature oil resistance) 0.1g of commercially available olive oil was dropped onto the obtained oil-resistant paper and left to stand in a 60°C hot air dryer. The time until an oil stain was observed on the reverse side was measured. The results are shown in Table 2.

[0099] [Table 2] *1: The weight of each component is expressed as the weight of its non-volatile content.

[0100] The symbols in Table 2 represent the following components. (wax) A1-1: Fischer-Tropsch wax, product name: "KH FT 80", melting point: 80℃, manufactured by China Oil Co., Ltd. A1-2: Fischer-Tropsch wax, product name: "FT-0070", melting point: 72℃, manufactured by Nippon Seiro Co., Ltd. A1-3: Fischer-Tropsch wax, product name: "KHWAX QP68H", melting point: 73℃, manufactured by China Oil Co., Ltd. A1-4: Fischer-Tropsch wax, product name: "Sasol Wax C80", melting point: 88°C, manufactured by Sasol. A1-5: Fischer-Tropsch wax, product name: "FNP-0090", melting point: 90℃, manufactured by Nippon Seiro Co., Ltd. A1-6: α-olefin wax, product name: "WEISSEN-0373", melting point: 71.5℃, manufactured by Nippon Seiro Co., Ltd. A2-1: Paraffin wax, product name: "Paraffin wax-155", melting point: 69℃, manufactured by Nippon Seiro Co., Ltd. A2-2: Paraffin wax, product name: "Paraffin wax-135", melting point: 59℃, manufactured by Nippon Seiro Co., Ltd. A2-3: Carnauba wax, Product name: "Refined Carnauba Wax Special No. 2", Carnauba wax, Melting point: 82℃, Manufactured by Kato Yoko Co., Ltd. A2-4: Rice wax, product name: "XECO-0002B", melting point: 76℃, manufactured by Nippon Seiro Co., Ltd. (emulsifier) B-1: Polyoxyethylene alkyl ether, trade name: "Newcol 2305", molecular weight: 436, HLB = 10.9, manufactured by Nippon Emulsifier Co., Ltd. (resin) • C-1: Polyurethane resin from manufacturing example 1

[0101] <Confirmation of the effect of emulsifier (B)> Examples 18-25, Comparative Examples 4-8 Oil-resistant compositions were obtained by changing the type and / or amount of emulsifier (B) shown in Table 2, using the same method as in Example 1. The mechanical stability, room-temperature oil resistance, and high-temperature oil resistance of these oil-resistant compositions were evaluated in the same manner as described above. The results, including those from Example 1, are shown in Table 3.

[0102] [Table 3] *2: The weight of each component is expressed as the weight of its non-volatile content.

[0103] The symbols in Table 3 represent the following components. (wax) A1-1: Fischer-Tropsch wax, product name: "KH FT 80", melting point: 80℃, manufactured by China Oil Co., Ltd. (emulsifier) B-1: Polyoxyethylene alkyl ether, trade name: "Newcol 2305", molecular weight: 436, HLB = 10.9, manufactured by Nippon Emulsifier Co., Ltd. • B-2: Polyoxyethylene alkyl ether, trade name: "Newcol 2307", molecular weight: 524, HLB = 12.6, manufactured by Nippon Emulsifier Co., Ltd. B-3: Polyoxyethylene monooleate, product name: "Ionet MO-600", molecular weight: 882, HLB = 13.7, manufactured by Sanyo Chemical Industries, Ltd. • B-4: Polyoxyethylene monooleate, product name: "Ionet MO-1000", molecular weight: 1284, HLB = 15.7, manufactured by Sanyo Chemical Industries, Ltd. • B-5: Polyoxyethylene stearate, product name: "Nonion S-15", molecular weight: 901, HLB = 13.7, manufactured by NOF Corporation. • B-6: A mixture of saturated monocarboxylic acid (stearic acid / palmitic acid = 70 / 30 by weight) (product name: "Lunaq S-70V", manufactured by Kao Corporation) completely neutralized with triethanolamine. Molecular weight: 425, HLB = 12.0 • B-7: A neutralized saturated monocarboxylic acid mixture of stearic acid / palmitic acid = 70 / 30 (by weight) (product name: "Lunaq S-70V", manufactured by Kao Corporation), neutralized by 0.5 equivalents with sodium hydroxide. Molecular weight: 287, HLB = 9.8 • B-8: A mixture of saturated monocarboxylic acid (stearic acid / palmitic acid = 70 / 30 by weight) (product name: "Lunaq S-70V", manufactured by Kao Corporation) neutralized by 0.7 equivalents with sodium hydroxide. Molecular weight: 291, HLB = 14.3 ·B'-1: Polyoxyethylene alkyl ether, trade name: "Newcol 2302", molecular weight: 282, HLB = 6.3, manufactured by Nippon Emulsifier Co., Ltd. ·B'-2: Polyoxyethylene alkyl ether, trade name: "Newcol 2360", molecular weight: 2770, HLB = 18.6, manufactured by Nippon Emulsifier Co., Ltd. ·B'-3: Stearyltrimethylammonium chloride, trade name: "Levon™-18", molecular weight: 348, HLB=8.3, manufactured by Sanyo Chemical Industries, Ltd. B'-4: Neutralized saturated monocarboxylic acid, a mixture of stearic acid / palmitic acid = 70 / 30 (by weight) (product name: "Lunaq S-70V", manufactured by Kao Corporation), neutralized by 0.2 equivalents with sodium hydroxide, molecular weight: 279, HLB = 4.7 B'-5: A neutralized saturated monocarboxylic acid mixture of stearic acid / palmitic acid = 70 / 30 (by weight) (product name: "Lunaq S-70V", manufactured by Kao Corporation), completely neutralized with sodium hydroxide. Molecular weight: 297, HLB = 18.3 (resin) • C-1: Polyurethane resin from manufacturing example 1

[0104] <Confirmation of the effect of resin (C)> Examples 26-38, Comparative Examples 9-10 Oil-resistant compositions were obtained by changing the type and / or amount of resin (C) shown in Table 3, using the same method as in Example 1. The mechanical stability, room-temperature oil resistance, and high-temperature oil resistance of these oil-resistant compositions were evaluated in the same manner as described above. The results, including those from Example 1, are shown in Table 4.

[0105] [Table 4] *3: The weight of each component is expressed as the weight of its non-volatile content.

[0106] The symbols shown in Table 4 represent the following components. (wax) A1-1: Fischer-Tropsch wax, product name: "KH FT 80", melting point: 80℃, manufactured by China Oil Co., Ltd. (emulsifier) B-1: Polyoxyethylene alkyl ether, trade name: "Newcol 2305", molecular weight: 436, HLB = 10.9, manufactured by Nippon Emulsifier Co., Ltd. (resin) • C-1: Polyurethane resin from manufacturing example 1 • C-2: Polyurethane resin in manufacturing example 2 • C-3: Modified epoxy resin of manufacturing example 3 • C-4: Styrene-maleic anhydride resin of manufacturing example 4 • C-5: Styrene-methacrylic resin of manufacturing example 5 • C-6: Polyacrylamide resin in manufacturing example 6 • C-7: Polyacrylamide resin in manufacturing example 7 • C-8: Polyacrylamide resin in manufacturing example 8 • C-9: Polyacrylamide resin in manufacturing example 9 • C-10: Polyvinyl alcohol, product name: "JP-45", weight-average molecular weight: 220,000, manufactured by Nippon Vi-Poval Co., Ltd. • C-11: Polyvinyl alcohol, product name: "JP-03", weight-average molecular weight: 15,000, manufactured by Nippon Vi-Poval Co., Ltd. • C'-1: Polyacrylamide resin of comparative manufacturing example 1

Claims

1. An oil-resistant composition comprising a wax (A) which is essential for a synthetic wax (A1), and an emulsifier (B) having an HLB value of 8 to 16, In terms of non-volatile content by weight, the oil-resistant composition contains 55% to 98% by weight of wax (A) in 100% by weight, The mixture contains less than 50% by weight of resin (C) per 100 parts by weight of wax (A), Emulsifier (B) is not a resin (C), Emulsifier (B) comprises a nonionic emulsifier (B1) and / or anionic emulsifier (B2), An oil-resistant composition comprising resin (C) selected from the group consisting of polyurethane resin, epoxy resin, styrene resin, poly(meth)acrylamide resin, and polyvinyl alcohol resin.

2. The oil-resistant composition according to claim 1, wherein the wax (A) further comprises a natural wax (A2).

3. Oil-resistant paper comprising the oil-resistant composition according to claim 1 or 2.

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