Oil-resistant agent composition, and oil-resistant paper

Abstract

The present invention relates to an oil-resistant agent composition containing a wax (A) essentially comprising a synthetic wax (A1) and an emulsifier (B) having an HLB value of 8-16, wherein: the oil-resistant agent composition contains, on a non-volatile content weight basis, 55-98 wt% of the wax (A) per 100 wt% of the oil-resistant agent composition and less than 50 wt% of a resin (C) per 100 parts by weight of the wax (A); the emulsifier (B) does not belong to the resin (C); the emulsifier (B) includes a nonionic emulsifier (B1) and / or an anionic emulsifier (B2); and the resin (C) includes one or more selected from the group consisting of polyurethane resins, epoxy resins, styrene resins, poly(meth)acrylamide resins, and polyvinyl alcohol resins. The present invention further relates to oil-resistant paper containing the oil-resistant agent composition.

Description

Oil-resistant agent composition, oil-resistant paper

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

[0002] Oil-resistant paper is widely used as wrapping paper for cooked foods containing large amounts of oil and moisture such as fried chicken, hamburgers, and grilled fish, or foods containing large amounts of oils and fats such as chocolate, paper rugs such as packaging containers and food trays, wrapping paper for desiccants and oxygen scavengers, bags for pet food, heavy bags for flour milling, and paper for construction materials. In addition, chemicals that impart oil resistance to paper are called oil-resistant agents.

[0003] Fluororesin-based oil-resistant agents have been conventionally used as oil-resistant agents. For example, methods such as internally adding a fluororesin-based oil-resistant agent to pulp slurry followed by papermaking, coating the surface of a paper base material, or impregnating a paper base material have been adopted. However, oil-resistant paper obtained by using said oil-resistant agent may generate perfluoro compounds when heated, which is not preferable from the aspect of environmental load, and in recent years, oil-resistant agents that do not contain fluororesin (non-fluororesin-based oil-resistant agents) have been demanded.

[0004] As a technology for such oil-resistant agents, for example, the invention of an aqueous oil-resistant agent containing an olefin resin and / or a urethane resin and paraffin wax is known (Patent Document 1), and when formed into oil-resistant paper, it has excellent oil resistance at normal temperature (hereinafter referred to as normal-temperature oil resistance). However, said 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.

[0005] Japanese Patent Application Laid-Open No. 2022-188338

[0006] An object of the present invention is to provide an oil-resistant agent composition that provides oil-resistant paper excellent in normal-temperature oil resistance and high-temperature oil resistance, and also has excellent mechanical stability.

[0007] The inventors of the present invention have conducted intensive studies and found that the above problems can be solved, and have completed the present invention. That is, the present invention relates to the following oil-resistant agent 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, wherein, by non-volatile weight, 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 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.

[0009] 2. The oil-resistant composition according to item 1, 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.

[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.

[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, and 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 it easier for the oil-resistant composition to exhibit excellent mechanical stability and oil resistance at room temperature.

[0015] As for 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 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] Examples of synthetic waxes (A1) include: polyolefin waxes obtained by polymerizing olefins (e.g., polymethylene wax, polyethylene wax, polypropylene wax, etc.); decomposed polyolefin waxes obtained by decomposing the polyolefin waxes; Fischer-Tropsch waxes 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 polyolefin wax or Fischer-Tropsch wax or polymerization of olefins with ethylenically unsaturated carboxylic acids (e.g., polymerization of ethylene and acrylic acid); ester waxes obtained by reacting the acid wax with an alcohol or by polymerization of olefins with ethylenically unsaturated esters (e.g., polymerization of ethylene and vinyl acetate); oxo-synthesis (reaction of alkenes such as ethylene with carbon monoxide and hydrogen) alcohol waxes; and amide waxes obtained by the reaction of the acid wax with an amine.

[0017] Furthermore, synthetic waxes (A1) also include those obtained by chemically modifying natural waxes (A2), which will be described later (for example, oxidized paraffin wax, chlorinated paraffin wax, acidic wax of oxidized paraffin wax, alcohol wax, amide wax, montan oxide wax, acidic wax of montan wax, ester wax, etc.).

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

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

[0020] Natural waxes (A2) are waxes that exist naturally and can be divided into animal-based waxes, plant-based waxes, petroleum-based waxes, and mineral-based waxes.

[0021] Regarding the physical properties of the natural wax (A2), the melting point is preferably 50 to 90°C, more preferably 60 to 85°C, and even more preferably 70 to 85°C, in order to ensure that the oil-resistant composition exhibits excellent mechanical stability.

[0022] Examples of animal-derived waxes include beeswax, whale wax, privet wax, lanolin, and shellac wax.

[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 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 an ester of a polyol and a fatty acid, HLB = 20(1-S / A) (S: saponification value of the ester, A: acid value of the fatty acid)

[0033] (2) When the molecule contains polyoxyethylene chains: HLB = (E + P) / 5 (E: weight %) of polyoxyethylene chains, P: weight %) of polyol-derived structures (3) When the molecule contains only polyoxyethylene chains as hydrophilic groups: HLB = E / 5 (E: weight %) of polyoxyethylene chains

[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]

[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 the 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 the wax (A) and the emulsifier (B), and the oil-resistant composition tends to exhibit excellent mechanical stability. Here, molecular weight refers to the sum of the atomic weights of all atoms constituting the 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 oxide 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 the saturated carboxylic acid used in the neutralized saturated carboxylic acid salt 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 isostearic acid; and saturated dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, and dodecanedioic acid. These may be used alone or in combination of two or more kinds.

[0044] Examples of the salt include alkali metal salts such as sodium salt and potassium salt; and salts such as ammonium salt. Examples of the neutralizing agent used for the neutralized saturated carboxylic acid salt 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 may be used alone or in combination of two or more kinds. Further, the neutralized saturated carboxylic acid salt can be used in either a completely neutralized form or a partially neutralized form.

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

[0046] Among these, from the viewpoints of emulsification compatibility with the wax (A) and excellent mechanical stability of the oil-resistant agent composition, a nonionic emulsifier (B1) is preferred, a polyoxyalkylene ether is more preferred, and a polyoxyethylene alkyl ether is even more preferred.

[0047] With regard to the content of the emulsifier (B), based on the points that it facilitates compatibility with the wax (A) to promote emulsification, and the resulting oil-resistant agent composition easily achieves both excellent mechanical stability, normal-temperature oil resistance and high-temperature oil resistance, the content in terms of non-volatile content weight is preferably 2% by weight or more and 40% by weight or less, more preferably 5% by weight or more and 30% by weight or less, and even more preferably 8% by weight or more and 25% by weight or less, relative to 100% by weight of the oil-resistant agent composition.

[0048] <Regarding Resin (C)> The oil-resistant agent composition of the present invention contains the resin (C) having a weight average molecular weight of 10,000 to 2,500,000 in an amount of less than 50% by weight relative to 100 parts by weight of the 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, room-temperature oil resistance, and high-temperature oil resistance. 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., can 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: polyethylene glycol, polypropylene glycol, hydroquinone, naphthol, trihydroxybiphenyl, bisresorcinol, bisxylenol, binaphthol, trihydroxyphenylmethane, tetrahydroxyphenylethane, and other polyols reacted with epichlorohydrin; ester-type epoxy resins (reactants of polycarboxylic acids such as phthalic acid, methylphthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, trimellitic acid, and / or polymerized fatty acids reacted with epichlorohydrin); ether ester-type epoxy resins (reactants of hydroxycarboxylic acids such as p-oxyphthalic acid and β-oxynaphthophthalic acid reacted 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 requires 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 acid anhydride resins, and styrene-acrylic resins, which are polymerized using styrenes and (meth)acrylate alkyl esters as essential reaction components.

[0060] Poly(meth)acrylamide resins are polymers that have (meth)acrylamide (i.e., methacrylamide, acrylamide, or a combination thereof) as an essential reactive component. Those containing styrenes as the reactive component belong to the category of styrene resins and not to the category of poly(meth)acrylamide resins.

[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 Vinyl Acetate 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 manufacturing.

[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 content of the hydrophilic organic solvent 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 to 60% by weight, and preferably 25 to 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 (wire) 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 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. As for the drying conditions, for example, the temperature is usually 70 to 220°C, preferably 100 to 200°C, and the time is usually 1 to 10 minutes, preferably 4 to 5 minutes. Drying can be carried out under normal pressure, under pressurized pressure, or under reduced pressure.

[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 A reaction vessel equipped with a stirrer, thermometer, condenser, and nitrogen gas inlet pipe was charged with 38.1 parts dimethylolbutanoic acid, 314.5 parts polyoxytetramethylene-polyoxypropylene glycol (trade name: "Polycerin DCB-2000", number average molecular weight 2000, manufactured by NOF Corporation), 128.9 parts isophorone diisocyanate, 12.7 parts 2-hydroxyethyl acrylate, and 256.1 parts stearyl methacrylate. The mixture was reacted at 85°C under a nitrogen stream for 5 hours to obtain 750.3 parts urethane prepolymer. Next, an aqueous solution consisting of 1208 parts ion-exchanged water, 225.0 parts isopropyl alcohol, 26.6 parts triethylamine, and 27.8 parts adipic acid dihydrazide was added while stirring, and the mixture was 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] Production Example 2 In the same reaction vessel as in Production Example 1, 59.4 parts of dimethylolbutanoic acid, 489.9 parts of polytetramethylene glycol (trade 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 ion-exchanged 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. Ion-exchanged water was added to obtain an aqueous solution of polyurethane resin (C-2) when the non-volatile content concentration reached 35%.

[0083] Production Example 3 In a reaction vessel similar to that 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] Production Example 4 In a reaction vessel similar to that 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 stream. 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] Production Example 5 A reaction vessel similar to that in Production Example 1, equipped with a stirrer, thermometer, condenser, nitrogen gas introduction tube, and two dropping funnels, was used to add 300 parts of deionized water while introducing nitrogen. The mixture was heated 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] Production Example 6: In a reaction vessel similar to that 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. 0.21 parts of ammonium persulfate and 0.09 parts of sodium bisulfite were added, and the mixture was reacted at 85°C for 2 hours. After that, deionized water was added to achieve a non-volatile content of 10.3% to obtain an aqueous solution of polyacrylamide resin (C-6).

[0087] Production Example 7 In a reaction vessel similar to that 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 while stirring under a nitrogen atmosphere. 2.5 parts of a 10% ammonium persulfate aqueous solution were added to this solution, and the reaction was allowed to proceed for 2 hours after the liquid temperature reached 90°C. After cooling, 4.5 parts of a 48% sodium hydroxide aqueous solution were added, and deionized water was added to obtain an aqueous solution of polyacrylamide resin (C-7) with a non-volatile content of 25%.

[0088] Production Example 8: In a reaction vessel similar to that 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. Then, deionized water was added to achieve a non-volatile content of 10.3% to obtain an aqueous solution of polyacrylamide resin (C-8).

[0089] Production Example 9 A reactor equipped with a stirrer, reflux condenser, and nitrogen inlet tube contained 69.3 parts acrylamide, 10.8 parts acrylic acid, 19.9 parts acrylonitrile, 2.5 parts isopropyl alcohol, and 394.8 parts deionized water. 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 Vitamin V, Inc.).

[0091] Comparative Production Example 1 A reaction apparatus equipped with a stirrer, thermometer, reflux condenser, nitrogen gas inlet tube, and three dropping funnels was filled with 276.5 parts of deionized water. After removing oxygen from the reaction system by passing nitrogen gas through it, the mixture was heated to 90°C. Dropping funnel (1) was filled with 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. 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 permation chromatography (GPC) under the following measurement conditions. The results are shown in Table 4. (Measurement conditions) Column: One Guard column PWXL and two GMPWXL columns manufactured by Tosoh Corporation 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: 0.8 ml / min Temperature: 40°C RI detector: Shodex RI-101 manufactured by Showa Denko K.K. MALS detector: DAWN HELEOS-II manufactured by WYATT Measurement sample: Resin (C) was diluted with the above eluent so that the non-volatile content concentration of resin (C) was 0.1% before measurement.

[0093] Example 1 A reaction vessel equipped with a stirrer, thermometer, condenser, nitrogen gas inlet tube, and dropping funnel was charged with 100 parts (non-volatile content) of Fischer-Tropsch wax (trade name: "KH FT 80", melting point: 80°C, manufactured by China Oil 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.) and melted at 90°C or higher. After adding 27.5 parts of deionized water dropwise from the dropping funnel, 10 parts (non-volatile content) of aqueous solution of 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 to 17 and Comparative Examples 1 to 3 were carried out in the same manner as in Example 1, with the composition and / or amount of wax shown in Table 1 changed, 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 being vigorously stirred for 5 minutes at a temperature of 25°C, a load of 10 kg, and a rotation speed of 1000 rpm, 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 (%) = (Oven-dry weight of aggregates / Oven-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 beat degree (C.S.F) of 300 ml (non-volatile content concentration: 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 in succession. After dewatering to obtain wet paper, oil-resistant paper was produced by hot-press drying (400 kgf load, 180°C x 2 min). Oil-resistant paper was also produced using the oil-resistant agent compositions of Examples 2 to 17 and Comparative Examples 1 to 3 in the same manner.

[0097] (Room temperature oil resistance) 0.1 g of commercially available olive oil was dropped onto the obtained 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) 0.1 g of commercially available olive oil was dropped onto the obtained oil-resistant paper and left to stand in a hot air dryer at 60°C. The time until an oil stain was observed on the reverse side was measured. The results are shown in Table 2.

[0099] *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°C, manufactured by China Oil Co., Ltd. ・A1-2: Fischer-Tropsch wax, product name: "FT-0070", melting point: 72°C, manufactured by Nippon Seiro Co., Ltd. ・A1-3: Fischer-Tropsch wax, product name: "KHWAX QP68H", melting point: 73°C, manufactured by China Oil Co., Ltd. ・A1-4: Fischer-Tropsch wax, product name: "Sazole wax" C80, melting point: 88°C, manufactured by Sasol Co., Ltd. A1-5: Fischer-Tropsch wax, product name: "FNP-0090", melting point: 90°C, manufactured by Nippon Seiro Co., Ltd. A1-6: α-olefin wax, product name: "WEISSEN-0373", melting point: 71.5°C, manufactured by Nippon Seiro Co., Ltd. A2-1: paraffin wax, product name: "Paraffin wax-155", melting point: 69°C, manufactured by Nippon Seiro Co., Ltd. A2-2: paraffin wax, product name: "Paraffin A2-3: wax-135, melting point: 59°C, manufactured by Nippon Seiro Co., Ltd. A2-4: carnauba wax, product name: "Refined Carnauba Wax Special No. 2", carnauba wax, melting point: 82°C, manufactured by Kato Yoko Co., Ltd. (emulsifier) ​​B-1: polyoxyethylene alkyl ether, product name: "Newcol 2305", molecular weight: 436, HLB = 10.9, manufactured by Nippon Emulsifier Co., Ltd. (resin) C-1: polyurethane resin of 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 and following the same procedure 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] *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, trade 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, trade name: "Ionet MO-600", molecular weight: 882, HLB = 13.7, manufactured by Sanyo Chemical Industries, Ltd. ・B-4: Polyoxyethylene monooleate, trade 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: Neutralized saturated monocarboxylic acid, a mixture of stearic acid / palmitic acid = 70 / 30 (weight ratio) (product name: "Lunaq S-70V", manufactured by Kao Corporation), completely neutralized with triethanolamine, Molecular weight: 425, HLB = 12.0 B-7: Neutralized saturated monocarboxylic acid, a mixture of stearic acid / palmitic acid = 70 / 30 (weight ratio) (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: "Revon™ 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 (weight ratio) (trade 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 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 sodium hydroxide, molecular weight: 297, HLB = 18.3 (resin) • C-1: Polyurethane resin of Production Example 1

[0104] <Confirmation of the effect of resin (C)> Examples 26-38, Comparative Examples 9-10 The type and / or amount of resin (C) shown in Table 3 were changed, and the same method as in Example 1 was used to obtain oil-resistant compositions. 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] *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, trade name: "KH FT 80", melting point: 80°C, 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 Production Example 1 • C-2: Polyurethane resin from Production Example 2 • C-3: Modified epoxy resin from Production Example 3 • C-4: Styrene-maleic anhydride resin from Production Example 4 • C-5: Styrene-methacrylic resin from Production Example 5 • C-6: Polyacrylamide resin from Production Example 6 • C-7: Polyacrylamide resin from Production Example 7 • C-8: Polyacrylamide resin from Production Example 8 • C-9: Polyacrylamide resin from Production Example 9 • C-10: Polyvinyl alcohol, product name: "JP-45", weight-average molecular weight: 220,000, manufactured by Nippon Vinegar & Polyvinyl Alcohol Co., Ltd. • C-11: Polyvinyl alcohol, product name: "JP-03", weight-average molecular weight: 15,000, manufactured by Nippon Vinegar & Polyvinyl Alcohol Co., Ltd. • C'-1: Polyacrylamide resin from Comparative Production Example 1

Claims

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, wherein, by non-volatile weight, 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 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.

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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