Coating type antifogging agent composition and use of the same

Abstract

To provide a coating type antifogging composition which can exhibit high antifogging property for a long period, and a resin composition formed by coating the coating type antifogging composition.SOLUTION: A coating type antifogging composition contains a nonionic surface active agent (A) having an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms, and a non-ionic surface active agent (B) having an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms, wherein each of the surface active agent (A) and the surface active agent (B) has HLB of 3 or more and 12 or less. The surface active agent (A) contains at least one kind selected from a fatty acid ester type non-ionic surface active agent (A1) and a nitrogen-containing non-ionic surface active agent (A2), and the surface active agent (B) preferably contains at least one kind selected from a fatty acid ester type non-ionic surface active agent (B1) and a nitrogen-containing non-ionic surface active agent (B2).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a coating-type antifogging agent composition and a resin composition coated with the coating-type antifogging agent composition. [Background technology]

[0002] Resins such as polyester, polystyrene, and polypropylene are widely used in food packaging and containers due to their excellent transparency, processability, rigidity, insulation, and moisture resistance. However, these resins are hydrophobic and have extremely low surface wettability. Therefore, when exposed to large amounts of moisture, such as when packaging moisture-containing foods (fruits, vegetables, meat, etc.), water droplets may form on the inner surface of the packaging film or sheet, causing fogging. This fogging not only obscures the visibility of the contents and reduces the product value, but also can accelerate food deterioration by allowing condensed water droplets to adhere to the packaged food. To address these issues, a method has been adopted in which anti-fogging agents consisting of various surfactants are applied to the resin surface to increase the surface wettability and prevent water droplets from forming on the surface. For example, Patent Document 1 proposes the use of sucrose fatty acid esters, and Patent Document 2 proposes the combined use of sucrose fatty acid esters and polyglycerin fatty acid esters. However, in recent years, there has been an increase in cases where the contents are packaged when they are freshly made and generate a lot of warm steam, or where they are reheated in a microwave oven while still packaged. This has led to the need for products that can maintain their anti-fogging properties for a long period of time under conditions of higher temperatures and more steam, and this demand is increasing year by year. To solve this problem, Patent Document 3 discloses that sucrose fatty acid ester and polyglycerin fatty acid ester are kneaded into the target resin and are also applied to the surface, thereby maintaining anti-fogging properties for a long period of time. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-98054 [Patent Document 2] Japanese Patent Application Publication No. 10-139907 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-36259 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when kneading a surfactant into a normal resin, it is necessary to prepare a masterbatch containing the surfactant at a high concentration in advance. This makes management and production complicated due to the large number of material varieties, and there are currently cases where this is not possible. Therefore, it is desired that a paint-type anti-fog agent alone can exhibit high anti-fog properties.

[0005] An object of the present invention is to provide a paint-type antifogging agent composition and a resin composition coated with the paint-type antifogging agent composition, which are capable of exhibiting high antifogging properties for a long period of time. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that a paint-type anti-fogging agent composition containing a specific surfactant (A) and a specific surfactant (B) can solve the above-mentioned problems, and have arrived at the present invention.

[0007] That is, the coating type anti-fogging agent composition of the present invention includes the following embodiments. <1> A paint-type anti-fogging agent composition comprising: a nonionic surfactant (A) having an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms; and a nonionic surfactant (B) having an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms, wherein the surfactant (A) and the surfactant (B) each have an HLB of 3 or more and 12 or less. <2> the surfactant (A) comprises at least one selected from a fatty acid ester-type nonionic surfactant (A1) and a nitrogen-containing nonionic surfactant (A2); The surfactant (B) comprises at least one selected from a fatty acid ester-type nonionic surfactant (B1) and a nitrogen-containing nonionic surfactant (B2). <1> The anti-fogging agent composition according to any one of claims 1 to 4, <3> the weight ratio ((A1+A2) / (B1+B2)) of the total of the surfactant (A1) and the surfactant (A2) to the total of the surfactant (B1) and the surfactant (B2) is 2 / 98 to 98 / 2; <2> The anti-fogging agent composition according to any one of claims 1 to 4, <4> Further containing a surfactant (C) having an HLB of more than 12 and 20 or less, <1> ~ <3> 1. The anti-fogging composition according to claim 1, <5> the weight ratio ((A+B) / C) of the total of the surfactant (A) and the surfactant (B) to the surfactant (C) is 80 / 20 to 20 / 80; <4> The anti-fogging agent composition according to any one of claims 1 to 4, <6> The viscosity of the aqueous dispersion with a non-volatile content of 10% by weight is 30 to 5000 mPa·s. <1> ~ <5> 1. The anti-fogging composition according to claim 1, <7> For at least one resin selected from polyethylene terephthalate, polystyrene, and polypropylene, <1> ~ <6> 1. The anti-fogging composition according to claim 1, <8> Contains water, <1> ~ <7> 1. The anti-fogging composition according to claim 1, <9> <1> ~ <8> 1. A resin composition obtained by applying the anti-fogging agent composition according to any one of the above items to a resin component. <10> The resin component contains at least one selected from polyethylene terephthalate, polystyrene, and polypropylene. <9> The resin composition according to claim 1. <11> It is in the form of a film or sheet, <9> or <10> The resin composition according to claim 1. [Effects of the Invention]

[0008] The paint-type anti-fogging agent composition of the present invention can exhibit high anti-fogging properties for a long period of time. The resin composition of the present invention is coated with the above-mentioned coating-type antifogging agent composition, and therefore can exhibit high antifogging properties for a long period of time. DETAILED DESCRIPTION OF THE INVENTION

[0009] The paint-type antifogging agent composition of the present invention (hereinafter sometimes simply referred to as antifogging agent) contains a nonionic surfactant (A) having an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms, and a nonionic surfactant (B) having an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms, wherein the surfactant (A) and the surfactant (B) each have an HLB of 3 or more and 12 or less. First, the components constituting the antifogging agent of the present invention will be described in detail.

[0010] [Nonionic surfactant (A)] The nonionic surfactant (A) (hereinafter sometimes simply referred to as surfactant (A)) is a surfactant having an HLB of 3 or more and 12 or less, which has an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms.

[0011] The surfactant (A) is not particularly limited as long as it has an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms and an HLB value of 3 or more and 12 or less, and examples thereof include fatty acid ester-type nonionic surfactants (A1), nitrogen-containing nonionic surfactants (A2), and polyoxyalkylene alkyl alcohol ethers. From the viewpoint of exhibiting anti-fogging properties, it is preferable that the surfactant contains at least one selected from fatty acid ester-type nonionic surfactants (A1) and nitrogen-containing nonionic surfactants (A2), and it is more preferable that the surfactant contains a fatty acid ester-type nonionic surfactant. The surfactant (A) preferably has an alkyl group having 6 to 12 carbon atoms in order to maintain anti-fogging properties. The surfactant (A) may be used alone or in combination of two or more. The surfactant (A) can be synthesized by a known method.

[0012] The fatty acid ester-type nonionic surfactant (A1) (hereinafter sometimes simply referred to as surfactant (A1)) is not particularly limited as long as it is an ester of a fatty acid and an alcohol, but the fatty acid constituting surfactant (A1) is preferably a fatty acid having 7 to 13 carbon atoms in terms of exhibiting anti-fogging properties. The upper limit of the number of carbon atoms in the fatty acid is more preferably 12. Meanwhile, the lower limit of the number of carbon atoms is more preferably 8, and even more preferably 10. Furthermore, for example, 8 to 12 is more preferable, and 10 to 12 is even more preferable.

[0013] The surfactant (A) is a surfactant with an HLB of 3 or more and 12 or less, but from the viewpoint of exhibiting anti-fogging properties, it preferably contains a surfactant with an HLB of 4 or more and 11 or less. The upper limit of the HLB is more preferably 10. On the other hand, the lower limit of the HLB is more preferably 5. Furthermore, for example, it is more preferable to contain a surfactant with an HLB of 5 or more and 10 or less. The HLB values ​​described in the present invention are calculated by the following four methods. In the case of polyhydric alcohol fatty acid esters, it refers to a value calculated by the method described in the following formula 1. HLB = 20 × (1 − S / A) (Equation 1) (In formula 1, S is the saponification value of the ester, and A is the neutralization value of the fatty acid that constitutes the ester.) When the hydrophilic group is only a polyoxyethylene group, it refers to a value calculated by the method described in the following formula 2. HLB=E / 5...(Formula 2) (In formula 2, E is the weight fraction of polyoxyethylene groups.) In the case of polyoxyethylene polyhydric alcohol fatty acid esters, it refers to a value calculated by the method described in the following formula 3. HLB=(E+P) / 5...(Formula 3) (In formula 3, E is the weight fraction of polyoxyethylene groups, and P is the weight fraction of polyhydric alcohol groups.) In the case of surfactants other than those mentioned above, such as nitrogen-containing nonionic surfactants, the calculation was performed from the organic conceptual diagram described in "Synthesis and Applications of Surfactants, Oda Ryohei, Teramura Kazuhiro, p. 501 (1957) Maki Shoten."

[0014] Examples of fatty acids constituting the surfactant (A1) include straight-chain carboxylic acids such as enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, and tridecanoic acid; and branched carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, and isotridecanoic acid. From the viewpoints of wettability to the resin composition and ease of availability, caprylic acid, capric acid, and lauric acid are preferred, and lauric acid is more preferred. The surfactant (A1) may be any of a monoester, diester, triester, tetraester, etc., and may have an intermediate degree of esterification, such as a reaction mole number of fatty acid to polyhydric alcohol of 1.5 or 2.5, but is preferably a monoester in terms of exhibiting anti-fogging properties.

[0015] The alcohol constituting the surfactant (A1) may be a dihydric or higher alcohol, and from the viewpoint of exhibiting anti-fogging properties, a trihydric or higher alcohol is preferred, with a tri- to octahydric alcohol being preferred. Examples of alcohols constituting the surfactant (A1) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerin, diglycerin, polyglycerin (average degree of polymerization 3 to 10), 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, sucrose, and polyethylene glycol. From the viewpoint of exhibiting anti-fogging properties, sorbitan, glycerin, and diglycerin are preferred.

[0016] The surfactant (A1) is not particularly limited, and examples thereof include sorbitan caprylate, sorbitan caprate, sorbitan laurate; glycerin caprylate, glycerin caprate, glycerin laurate; diglycerin caprylate, diglycerin caprate, diglycerin laurate; sucrose laurate, and the like. In terms of anti-fogging properties and wettability to the resin composition, sorbitan monocaprylate, sorbitan monocaprate, sorbitan monolaurate; glycerin monocaprylate, glycerin monocaprate, glycerin monolaurate; diglycerin monocaprylate, diglycerin monocaprate, and diglycerin monolaurate are preferred, with sorbitan monolaurate, glycerin monolaurate, and diglycerin monolaurate being more preferred.

[0017] As the nitrogen-containing nonionic surfactant (A2) (hereinafter sometimes simply referred to as surfactant (A2)), alkyldiethanolamines and fatty acid amides are preferred in terms of the anti-fogging properties and wettability to the resin composition.

[0018] The alkyldiethanolamine is not particularly limited, but in terms of anti-fogging properties and wettability to the resin composition, hexyldiethanolamine, octyldiethanolamine, decyldiethanolamine, and lauryldiethanolamine are preferred, and lauryldiethanolamine is more preferred. The fatty acid amide is not particularly limited, but from the viewpoint of anti-fogging properties and wettability to the resin composition, caprylic acid mono- or diethanolamide, capric acid mono- or diethanolamide, and lauric acid mono- or diethanolamide are preferred, and lauric acid diethanolamide is more preferred.

[0019] The surfactant (A) other than the surfactant (A1) and the surfactant (A2) is not particularly limited, but examples thereof include polyoxyalkylene alkyl alcohol ethers.

[0020] [Nonionic surfactant (B)] The nonionic surfactant (B) (hereinafter sometimes simply referred to as surfactant (B)) is a surfactant having an HLB of 3 or more and 12 or less, which has an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms.

[0021] The surfactant (B) is not particularly limited as long as it has an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms and an HLB value of 3 or more and 12 or less, and examples thereof include fatty acid ester-type nonionic surfactants (B1), nitrogen-containing nonionic surfactants (B2), polyoxyalkylene alkyl alcohol ethers, etc., and from the viewpoint of exhibiting anti-fogging properties and wettability to the resin composition, it is preferable that the surfactant (B) contains at least one selected from fatty acid ester-type nonionic surfactants (B1) and nitrogen-containing nonionic surfactants (B2), and it is more preferable that the surfactant (B) contains a fatty acid ester-type nonionic surfactant. The surfactant (B) preferably has an alkyl group having 13 to 22 carbon atoms in order to prevent the antifogging agent from leaking out. Surfactants having an HLB of 3 or more and 12 or less and having an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms, and an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms, correspond to the surfactant (B) in the present invention. One or more types of surfactant (B) may be used. The surfactant (B) can be synthesized by a known method.

[0022] The surfactant (B) is an active agent with an HLB of 3 or more and 12 or less, but from the viewpoint of preventing outflow of the antifogging agent, it is preferable to include a surfactant with an HLB of 4 or more and 11 or less. The upper limit of the HLB is more preferably 10. On the other hand, the lower limit of the HLB is more preferably 5, and even more preferably 6. Furthermore, for example, it is more preferable to include a surfactant with an HLB of 5 or more and 10 or less, and even more preferable to include a surfactant with an HLB of 6 or more and 10 or less.

[0023] The fatty acid ester-type nonionic surfactant (B1) (hereinafter sometimes simply referred to as surfactant (B1)) is not particularly limited as long as it is an ester of a fatty acid and an alcohol, but the fatty acid constituting the surfactant (B1) is preferably a fatty acid having 14 to 22 carbon atoms from the viewpoint of preventing outflow of the antifogging agent. The upper limit of the number of carbon atoms in the fatty acid is more preferably 20, and even more preferably 18. On the other hand, the lower limit of the number of carbon atoms is more preferably 16. Furthermore, for example, 16 to 20 is more preferable, and 16 to 18 is even more preferable.

[0024] Examples of fatty acids constituting the surfactant (B1) include linear carboxylic acids such as myristic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, and behenic acid; branched carboxylic acids such as isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; and unsaturated carboxylic acids such as palmitoleic acid, oleic acid, and linoleic acid. From the viewpoint of preventing outflow of the anti-fogging agent, myristic acid, palmitic acid, stearic acid, behenic acid, and oleic acid are preferred, and stearic acid and oleic acid are more preferred. The surfactant (B1) may be any of a monoester, diester, triester, tetraester, etc., and may have an intermediate degree of esterification, such as a reaction mole number of fatty acid to polyhydric alcohol of 1.5 or 2.5, but is preferably a monoester in terms of exhibiting anti-fogging properties.

[0025] The alcohol constituting the surfactant (B1) may be a dihydric or higher alcohol, and from the viewpoint of improving anti-fogging properties, a trihydric or higher alcohol is preferred, with a trihydric to dodecahydric alcohol being preferred. Examples of alcohols constituting the surfactant (B1) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerin, diglycerin, polyglycerin (average degree of polymerization 3 to 10), 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, sucrose, and polyethylene glycol. From the viewpoint of exhibiting anti-fogging properties, sorbitan, glycerin, and diglycerin are preferred.

[0026] The surfactant (B1) is not particularly limited, and examples thereof include sorbitan myristate, sorbitan palmitate, sorbitan stearate, sorbitan oleate, sorbitan behenate; glycerin myristate, glycerin palmitate, glycerin stearate, glycerin oleate, glycerin behenate; diglycerin myristate, diglycerin palmitate, diglycerin stearate, diglycerin oleate, diglycerin behenate, polyglycerin stearate, and sucrose stearate. From the viewpoint of maintaining high-temperature anti-fogging properties for a long period of time, sorbitan monostearate, sorbitan monobehenate, glycerin monostearate, glycerin monobehenate, diglycerin monostearate, and diglycerin monobehenate are preferred, and sorbitan monostearate, glycerin monostearate, and diglycerin monostearate are more preferred.

[0027] As the nitrogen-containing nonionic surfactant (B2) (hereinafter sometimes simply referred to as surfactant (B2)), alkyldiethanolamines, alkenyldiethanolamines, fatty acid amides, and N-2-hydroxyethyl-N-(2-hydroxyalkyl)amines are preferred, with alkyldiethanolamines and fatty acid amides being more preferred, in terms of maintaining high-temperature anti-fogging properties for a long period of time.

[0028] The alkyldiethanolamine and alkenyldiethanolamine are not particularly limited, but in terms of maintaining high-temperature anti-fogging properties for a long period of time, myristyldiethanolamine, palmityldiethanolamine, stearyldiethanolamine, and oleyldiethanolamine are preferred, and stearyldiethanolamine is more preferred. The fatty acid amide is not particularly limited, but in terms of maintaining high-temperature anti-fogging properties for a long period of time, myristic acid mono- or diethanolamide, palmitic acid mono- or diethanolamide, stearic acid mono- or diethanolamide, and oleic acid mono- or diethanolamide are preferred, and stearic acid diethanolamide is more preferred. There are no particular limitations on the N-2-hydroxyethyl-N-(2-hydroxyalkyl)amine, but N-2-hydroxyethyl-N-(2-hydroxystearyl)amine is preferred in terms of maintaining high-temperature anti-fogging properties for a long period of time.

[0029] The surfactant (B) other than the surfactant (B1) and the surfactant (B2) is not particularly limited, but examples thereof include polyoxyalkylene alkyl alcohol ethers.

[0030] [Surfactants with an HLB of over 12 and under 20 (C)] The anti-fogging agent of the present invention may contain a surfactant (C) having an HLB of more than 12 and not more than 20 (hereinafter, sometimes simply referred to as surfactant (C)). Examples of surfactant (C) include polyhydric alcohol fatty acid esters (C1), alkylene oxide adducts of polyhydric alcohol fatty acid esters (C2), polyoxyalkylene alkyl ethers (C3), polyoxyalkylene alkyl amino ethers, and polyoxyalkylene fatty acid amides. From the viewpoints of wettability to resin compositions and high safety, polyhydric alcohol fatty acid esters (C1), alkylene oxide adducts of polyhydric alcohol fatty acid esters (C2), and polyoxyalkylene alkyl ethers (C3) are preferred, and polyhydric alcohol fatty acid esters and polyoxyalkylene alkyl ethers are more preferred. One or more types of surfactant (C) may be used in combination. A known method can be used to synthesize surfactant (C).

[0031] The surfactant (C) is an active agent having an HLB of more than 12 and not more than 20, but from the viewpoint of the aqueous dispersibility of the antifogging agent composition, it is preferable to include a surfactant having an HLB of 12.3 or more and 19 or less. The upper limit of the HLB is more preferably 18. On the other hand, the lower limit of the HLB is more preferably 13. Furthermore, it is even more preferable to include a surfactant having an HLB of 13 or more and 18 or less.

[0032] The polyhydric alcohol fatty acid ester (C1) is not particularly limited as long as it is an ester of a fatty acid and an alcohol, but the fatty acid constituting the polyhydric alcohol fatty acid ester (C1) is preferably a fatty acid having 6 to 22 carbon atoms in terms of wettability to the resin composition. The upper limit of the number of carbon atoms of the fatty acid is more preferably 20, even more preferably 18, and particularly preferably 16. On the other hand, the lower limit of the number of carbon atoms is more preferably 8, even more preferably 10, and particularly preferably 12. Also, for example, 8 to 20 is more preferable, 10 to 18 is more preferable, and 12 to 16 is particularly preferable.

[0033] The polyhydric alcohol constituting the polyhydric alcohol fatty acid ester (C1) is not particularly limited as long as it is a dihydric or higher alcohol, but from the viewpoint of exhibiting anti-fogging properties, dihydric to dodecahydric alcohols are preferred.

[0034] Examples of polyhydric alcohols constituting the polyhydric alcohol fatty acid ester (C1) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerin, diglycerin, polyglycerin (average degree of polymerization 3 to 10), 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, sucrose, and polyethylene glycol. From the viewpoints of wettability to the resin composition and the expression of anti-fogging properties, polyglycerin and sucrose are preferred.

[0035] Examples of fatty acids constituting the polyhydric alcohol fatty acid ester (C1) include straight-chain carboxylic acids such as enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, and behenic acid; branched carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; and unsaturated carboxylic acids such as palmitoleic acid, oleic acid, and linoleic acid. From the viewpoint of wettability and anti-fogging properties of the resin composition, lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid are preferred, and lauric acid is more preferred.

[0036] The polyhydric alcohol fatty acid ester (C1) may be any of a monoester, a diester, a triester, a tetraester, etc., and may have an intermediate degree of esterification, such as a reaction mole number of fatty acid to polyhydric alcohol of 1.5 or 2.5. However, a monoester is preferred in terms of wettability and anti-fogging properties of the resin composition.

[0037] The polyhydric alcohol fatty acid ester (C1) is not particularly limited, but in terms of wettability and anti-fogging properties in the resin composition, sucrose fatty acid esters such as sucrose laurate, sucrose myristate, sucrose palmitate, sucrose stearate, and sucrose oleate are preferred; polyglycerin fatty acid esters such as polyglycerin laurate, polyglycerin myristate, polyglycerin palmitate, polyglycerin stearate, and polyglycerin oleate; polyethylene glycol fatty acid esters such as polyethylene glycol laurate, polyethylene glycol coconut fatty acid ester, polyethylene glycol myristate, polyethylene glycol palmitate, polyethylene glycol stearate, and polyethylene glycol oleate, with sucrose laurate and polyglycerin laurate being more preferred. Furthermore, it is even more preferred that the polyglycerin laurate is decaglycerin laurate.

[0038] The alkylene oxide adduct (C2) of a polyhydric alcohol fatty acid ester is not particularly limited as long as it has a structure in which an alkylene oxide is added to a polyhydric alcohol fatty acid ester. Examples of the alkylene oxide include ethylene oxide, propylene oxide, and butylene oxide, with ethylene oxide being preferred in terms of anti-fogging properties. The alkylene oxide may be used alone or in combination of two or more kinds, and may be added randomly or in blocks to the polyhydric alcohol fatty acid ester (C1).

[0039] The alkylene oxide adduct (C2) of a polyhydric alcohol fatty acid ester is not particularly limited, but in terms of wettability and anti-fogging properties of the resin composition, preferred are polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan myristate, polyoxyethylene sorbitan palmitate, polyoxyethylene sorbitan stearate, and polyoxyethylene sorbitan oleate; polyoxyethylene glycerin fatty acid esters such as polyoxyethylene glycerin laurate, polyoxyethylene glycerin myristate, polyoxyethylene glycerin palmitate, polyoxyethylene glycerin stearate, and polyoxyethylene glycerin oleate; polyoxyethylene castor oil ether, and polyoxyethylene hydrogenated castor oil ether, with polyoxyethylene sorbitan laurate and polyoxyethylene castor oil ether being more preferred.

[0040] The polyoxyalkylene alkyl ether (C3) is not particularly limited as long as it has a structure in which an alkylene oxide is added to a primary or secondary alcohol, and the alkyl group is not particularly limited as long as it has a linear or branched structure. From the viewpoint of wettability and anti-fogging properties of the resin composition, the number of carbon atoms of the primary or secondary alcohol is preferably 1 to 22. The upper limit of the carbon number is more preferably 20, even more preferably 18, and particularly preferably 14. On the other hand, the lower limit of the carbon number is more preferably 8, even more preferably 10, and particularly preferably 12. Also, for example, 8 to 20 is more preferable, 10 to 18 is more preferable, and 12 to 14 is particularly preferable.

[0041] Examples of primary alcohols include methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, 2-ethylhexanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacontanol. Of these, decanol, undecanol, dodecanol, tridecanol, and tetradecanol are preferred in terms of wettability to the resin composition and anti-fogging properties.

[0042] Examples of secondary alcohols include isopropanol, isobutanol, isohexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isotriacontanol, isohexadecanol, isoheptadecanol, isooctadecanol, isononadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexacosanol, isoheptacosanol, isooctacosanol, isononacosanol, and isopentadecanol; and alcohols having an alkyl distribution such as secondary alcohols (C=12 to 14). Of these, isodecanol, isododecanol, isotridecanol, isotetradecanol, and secondary alcohols (C=12 to 14) are preferred in terms of wettability to the resin composition and anti-fogging properties.

[0043] The polyoxyalkylene alkyl ether (C3) is not particularly limited, but from the viewpoints of anti-fogging properties and wettability to the resin composition, polyoxyethylene octanol ether, polyoxyethylene decanol ether, polyoxyethylene undecyl alcohol ether, polyoxyethylene lauryl alcohol ether, polyoxyethylene tridecyl alcohol ether, and polyoxyethylene secondary alcohol (C=12-14) ether are preferred, and polyoxyethylene lauryl alcohol ether and polyoxyethylene secondary alcohol (C=12-14) ether are more preferred.

[0044] There are no particular limitations on the polyoxyalkylene alkylamino ether, as long as it has a structure in which an alkylene oxide is added to an alkylamine. Examples of alkylamines include octylamine, decylamine, laurylamine, octadecylamine, coconut alkylamine, oleylamine, coconut amine, palm kernel amine, palm amine, (hardened) beef tallow amine, and (hardened) lard amine. The polyoxyalkylene alkylamino ether is not particularly limited, but polyoxyethylene lauryl amino ether is preferred in terms of anti-fogging properties and wettability to the resin composition.

[0045] The polyoxyalkylene fatty acid amide is not particularly limited as long as it has a structure in which ethylene oxide is added to a fatty acid amide. Examples of fatty acids include linear carboxylic acids such as enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, and behenic acid; branched carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; unsaturated carboxylic acids such as palmitoleic acid, oleic acid, and linoleic acid; and fatty acids having a fatty acid distribution such as coconut oil fatty acid, palm kernel fatty acid, palm oil fatty acid, (hardened) beef tallow fatty acid, (hardened) lard fatty acid, (hardened) soybean fatty acid, and (hardened) rapeseed oil fatty acid. The polyoxyalkylene fatty acid amide is not particularly limited, but in terms of anti-fogging properties and wettability to the resin composition, polyoxyethylene lauryl diethanolamide, polyoxyethylene coconut oil fatty acid diethanolamide polyoxyethylene stearyl diethanolamide, and polyoxyethylene oleyl diethanolamide are preferred, and polyoxyethylene lauryl diethanolamide and polyoxyethylene coconut oil fatty acid diethanolamide are more preferred.

[0046] 〔solvent〕 The antifogging agent of the present invention preferably contains a solvent in terms of coating properties. The solvent is not particularly limited, but examples thereof include water, alcohol solvents, carboxylic acid ester solvents, ketone solvents, amide solvents, ether solvents, aliphatic and aromatic hydrocarbon solvents, etc. Examples of the alcohol solvents include methanol, ethanol, isopropyl alcohol, n-butanol, diacetone alcohol, 2-methoxyethanol (methyl cellosolve), 2-ethoxyethanol (ethyl cellosolve), 2-butoxyethanol (butyl cellosolve), tertiary amyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, 3-methoxy-1-butanol, and 3-methoxy-3-methyl-1-butanol. Examples of the carboxylic acid ester solvents include ethyl acetate, n-propyl acetate, butyl acetate, and butyl formate. Examples of the ketone solvents include methyl ethyl ketone, methyl isobutyl ketone, acetone, and cyclohexanone. Examples of the amide solvents include dimethylformamide and dimethylacetamide. Examples of the ether solvents include diethyl ether, methoxytoluene, 1,2-dimethoxyethane, 1,2-dibutoxyethane, 1,1-dimethoxymethane, 1,1-dimethoxyethane, 1,4-dioxane, tetrahydrofuran, etc. Examples of the aliphatic and aromatic hydrocarbon solvents include hexane, pentane, xylene, toluene, benzene, etc. As the solvent, water, ethanol, and isopropyl alcohol are preferred, and water is more preferred, from the viewpoints of safety and economy. The solvents may be used alone or in combination of two or more kinds.

[0047] [Ionic surfactants] The antifogging agent of the present invention may contain an ionic surfactant as long as it does not significantly affect the effects of the present invention. The ionic surfactant is not particularly limited, but examples thereof include anionic surfactants such as alkyl (C10-20) sulfonate (Na, K, NH4), alkyl (C9-20) benzenesulfonate (Na, K, NH4), alkyl naphthalene sulfonate Na, sodium dialkyl sulf(C4-16) phosuccinate, alkyl (C8-20) sulfate (Na, K, NH4), polyoxyethylene aliphatic alcohol (C12-20) ether sulfate (Na, NH4), polyoxyethylene (4-10 mol) alkyl (C12-13) phosphate, fatty acid (C8-22) salt (Na, K, NH4), and cationic surfactants such as dimethyl dialkyl (C8-18) ammonium chloride.

[0048] [Water-soluble polymer] The antifogging agent of the present invention may contain a water-soluble polymer in order to prevent the antifogging agent from leaking out. The water-soluble polymer is not particularly limited, but examples thereof include polyvinyl alcohol, polyacrylic acid, poly(acrylic acid-acrylic acid ester) copolymer, polymethacrylic acid, poly(methacrylic acid-methacrylic acid ester) copolymer, methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, pectin, guar gum, carrageenan, xanthan gum, and tamarind.

[0049] [Other ingredients] The anti-fogging agent of the present invention may further contain, as other components in addition to the surfactants (A), (B), and (C), antistatic agents such as higher alcohols, higher alcohol fatty acid esters, and polyhydric alcohol fatty acid amides, thickeners, antibacterial agents, desiccant agents, ultraviolet absorbers, antioxidants for preventing discoloration, and the like, within the range that does not impair the effects of the present invention.

[0050] [Coating-type anti-fogging agent composition and its manufacturing method] The paint-type anti-fogging agent composition of the present invention contains the surfactant (A) and the surfactant (B), and can impart anti-fogging properties by being applied to a resin component, etc., described below. The reason for the decrease in anti-fogging properties is that the anti-fogging agent is washed away by moisture generated from food, but the reason why the paint-type anti-fogging agent composition of the present invention can exhibit high anti-fogging properties for a long period of time is thought to be, although not particularly limited, because the surfactant (A) serves as the main agent for exhibiting anti-fogging properties and the surfactant (B) serves as an agent for preventing the anti-fogging agent from leaking out.

[0051] The proportion of surfactant (A) in the nonvolatile content of the antifogging agent of the present invention is not particularly limited, but is preferably 0.4 to 98% by weight from the viewpoint of exhibiting antifogging properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. Meanwhile, the lower limit of this proportion is more preferably 1% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, it is more preferably 1 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight. The nonvolatile content in the present invention is that described in the Examples.

[0052] The total proportion of surfactant (A1) in the nonvolatile content of the antifogging agent of the present invention is not particularly limited, but is preferably 0 to 98% by weight from the viewpoint of exhibiting antifogging properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. On the other hand, the lower limit of this proportion is more preferably 0.4% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, it is more preferably 0.4 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight.

[0053] The total proportion of surfactant (A2) in the nonvolatile content of the antifogging agent of the present invention is not particularly limited, but is preferably 0 to 98% by weight from the viewpoint of exhibiting antifogging properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. On the other hand, the lower limit of this proportion is more preferably 0.4% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, it is more preferably 0.4 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight.

[0054] The proportion of surfactant (B) in the nonvolatile content of the anti-fogging agent of the present invention is not particularly limited, but is preferably 0.4 to 98% by weight in order to maintain high-temperature anti-fogging properties for a long period of time. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. Meanwhile, the lower limit of this proportion is more preferably 1% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, the proportion is more preferably 1 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight.

[0055] The proportion of the surfactant (B1) in the nonvolatile content of the anti-fogging agent of the present invention is not particularly limited, but is preferably 0 to 98% by weight from the viewpoint of exhibiting anti-fogging properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. On the other hand, the lower limit of this proportion is more preferably 0.4% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, the proportion is more preferably 0.4 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight.

[0056] The proportion of the surfactant (B2) in the nonvolatile content of the anti-fogging agent of the present invention is not particularly limited, but is preferably 0 to 98% by weight from the viewpoint of exhibiting anti-fogging properties. The upper limit of this proportion is more preferably 90% by weight, even more preferably 80% by weight, particularly preferably 70% by weight, and most preferably 60% by weight. On the other hand, the lower limit of this proportion is more preferably 0.4% by weight, even more preferably 5% by weight, particularly preferably 10% by weight, and most preferably 15% by weight. Also, for example, the lower limit is more preferably 0.4 to 90% by weight, even more preferably 5 to 80% by weight, particularly preferably 10 to 70% by weight, and most preferably 15 to 60% by weight.

[0057] The weight ratio ((A1+A2) / (B1+B2)) of the total of surfactant (A1) and surfactant (A2) to the total of surfactant (B1) and surfactant (B2) is not particularly limited, but is preferably 2 / 98 to 98 / 2 in order to achieve both low-temperature anti-fogging properties and high-temperature anti-fogging properties. The upper limit of this ratio is more preferably 97 / 3, even more preferably 96 / 4, and particularly preferably 95 / 5. On the other hand, the lower limit of this ratio is more preferably 10 / 90, even more preferably 15 / 85, and particularly preferably 20 / 80. Furthermore, for example, it is more preferably 97 / 3 to 10 / 90, even more preferably 96 / 4 to 15 / 85, and particularly preferably 95 / 5 to 20 / 80.

[0058] The proportion of the surfactant (C) in the nonvolatile content of the antifogging agent of the present invention is not particularly limited, but is preferably 20 to 80% by weight from the viewpoint of the aqueous dispersibility of the antifogging agent composition. The upper limit of this proportion is more preferably 75% by weight, even more preferably 70% by weight, and particularly preferably 60% by weight. Meanwhile, the lower limit of this proportion is more preferably 30% by weight, even more preferably 40% by weight, and particularly preferably 45% by weight. Also, for example, it is more preferably 30 to 75% by weight, even more preferably 40 to 70% by weight, and particularly preferably 45 to 60% by weight.

[0059] The weight ratio ((A+B) / C) of the total of the surfactant (A) and the surfactant (B) to the surfactant (C) is not particularly limited, but is preferably 20 to 80% by weight from the viewpoint of the aqueous dispersibility of the antifogging agent composition. The upper limit of this ratio is more preferably 75% by weight, even more preferably 70% by weight, and particularly preferably 60% by weight. On the other hand, the lower limit of this ratio is more preferably 30% by weight, even more preferably 40% by weight, and particularly preferably 45% by weight. Also, for example, it is more preferably 30 to 75% by weight, even more preferably 40 to 70% by weight, and particularly preferably 45 to 60% by weight.

[0060] The proportion of the solvent in the anti-fogging agent of the present invention is not particularly limited, but from the viewpoint of production stability, it is preferably 5 to 99.99 wt%. The upper limit of this proportion is more preferably 99.9 wt%, even more preferably 99.85 wt%, and particularly preferably 97.5 wt%. Also, for example, it is more preferably 5 to 99.9 wt%, and even more preferably 5 to 99.85 wt%.

[0061] The proportion of water in the anti-fogging agent of the present invention is not particularly limited, but is preferably 0 to 99.99% by weight from the viewpoints of coatability and production safety. The upper limit of this proportion is more preferably 99.9% by weight, even more preferably 99.85% by weight, and particularly preferably 97.5% by weight. Meanwhile, the lower limit of this proportion is more preferably 5% by weight, even more preferably 10% by weight, and particularly preferably 20% by weight. Also, for example, 5 to 99.9% by weight is more preferred, and 10 to 99.85% by weight is more preferred.

[0062] The viscosity of the anti-fogging agent of the present invention when dispersed in water with a non-volatile content of 10% by weight is not particularly limited, but is preferably 30 to 5000 mPa·s in order to maintain high-temperature anti-fogging properties. The upper limit of the viscosity is more preferably 2000 mPa·s, even more preferably 1000 mPa·s, and particularly preferably 500 mPa·s. On the other hand, the lower limit of the viscosity is more preferably 35 mPa·s, even more preferably 40 mPa·s, and particularly preferably 50 mPa·s. Also, for example, the viscosity is more preferably 35 to 2000 mPa·s, even more preferably 40 to 1000 mPa·s, and particularly preferably 50 to 500 mPa·s. A viscosity of 30 mPa·s to 5000 mPa·s tends to inhibit runoff of the anti-fogging agent and improve coatability. The viscosity of the antifogging agent when dispersed in water with a nonvolatile content of 10% by weight is measured by the method described in the Examples.

[0063] The anti-fogging agent composition of the present invention can be produced by mixing the above-described components. The mixing method is not particularly limited, and the components may be mixed all at once or sequentially, or some components may be mixed in advance and then mixed with the remaining components.

[0064] [Resin composition and method for producing the same] The resin composition of the present invention is obtained by applying the above-mentioned paint-type anti-fogging agent composition to a resin component. The resin component contained in the resin composition is not particularly limited, but examples thereof include polyethylene terephthalate, polystyrene, polypropylene, polyvinyl chloride, etc. From the viewpoint of reducing the environmental load, it is preferable to contain at least one selected from polyethylene terephthalate, polystyrene, and polypropylene. Furthermore, it is more preferable that the polypropylene is transparent polypropylene.

[0065] The amount of nonvolatile content of the anti-fogging agent applied to the surface of the resin composition is not particularly limited, but is preferably 1 to 300 mg / m from the viewpoint of anti-fogging properties and transparency. 2 The upper limit of the ratio is preferably 250 mg / m 2 More preferably, 200 mg / m 2is more preferably 150 mg / m 2 On the other hand, the lower limit of the ratio is 3 mg / m 2 More preferably, 5 mg / m 2 is more preferably 10 mg / m 2 is particularly preferred. 2 More preferably, 5 to 200 mg / m 2 is more preferably 10 to 150 mg / m 2 is particularly preferred.

[0066] The method for applying the coating-type antifogging agent composition is not particularly limited, and known methods such as spraying, roll coating, gravure coating, knife coating, and immersion are used, with spraying and roll coating being preferred. The solvent used to dilute the antifogging agent composition is preferably a solvent such as water or alcohol that dissolves the antifogging agent but does not dissolve the resin sheet, and that satisfies safety requirements depending on the field of application.

[0067] The resin composition of the present invention may further contain resin additives such as antioxidants, ultraviolet absorbers, stabilizers such as ultraviolet absorbers, lubricants, antistatic agents, nucleating agents, pigments, inorganic fillers, and plasticizers, within the range that does not impair the effects of the present invention.

[0068] There are no particular limitations on the resin component to which the anti-fogging agent of the present invention is applied and on the shape of the resin composition of the present invention, but from the standpoint of moldability, a film or sheet shape is preferred.

[0069] When the resin component to which the anti-fog agent of the present invention is applied and the resin composition of the present invention are in the form of a sheet, the thickness of the sheet is not particularly limited, but is typically 100 to 700 μm. The sheet is, for example, thermoformed and used as a container. In the present invention, the resin is extrusion-molded, and if necessary, stretched. After coating with the anti-fog agent, the sheet is dried and wound into a roll or immediately subjected to thermoforming. The anti-fog agent may be applied immediately to the sheet surface, but it is preferable to first perform a surface treatment such as corona discharge treatment or high-frequency treatment to enhance the wettability of the sheet surface, as this ensures good coverage of the anti-fog agent. Preferably, the surface tension of the sheet is adjusted to 35 to 60 mN / m by corona discharge treatment.

[0070] When the resin component to which the anti-fog agent of the present invention is applied and the resin composition of the present invention are in the form of a film, the thickness of the film is not particularly limited, but is usually 15 to 100 μm. The film is thermoformed and used as a container. In the present invention, the resin is extrusion-molded, and if necessary, stretched. After coating with the anti-fog agent, the film is dried and wound into a roll or immediately subjected to thermoforming. The anti-fog agent may be applied immediately to the film surface, but it is preferable to perform a surface treatment such as corona discharge treatment or high-frequency treatment in advance to enhance the wettability of the sheet surface, as this ensures good coating of the anti-fog agent. Preferably, the surface tension of the film is adjusted to 35 to 60 mN / m by corona discharge treatment.

[0071] The resin composition of the present invention can be molded into a container by a known thermoforming method such as vacuum forming, vacuum pressure forming, pressure forming, etc. When the resin composition is, for example, a biaxially oriented polystyrene resin sheet, it is mainly molded into the shape of a container by a contact heating pressure forming method using a hot plate heating pressure forming machine. Containers obtained by thermoforming are primarily used as transparent, lightweight packaging containers for food. Specific examples include lid molded products such as slip-on lids and snap-on lids, so-called food pack molded products with a connected lid and body, cup molded products, tray molded products, etc. Lid molded products are used for lunch box lids, sushi lids, cake lids, etc. Food pack molded products are used to package prepared foods, fruits and vegetables, sweets, etc., and cup molded products and tray molded products are used for noodles, sweets, etc. [Example]

[0072] The present invention will be described in detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples. The physical properties of the coating-type anti-fogging agent composition and the resin composition in the examples were measured and evaluated by the following methods. Hereinafter, the coating-type anti-fogging agent composition may be referred to as the "anti-fogging agent" for simplicity.

[0073] [Non-volatile content measurement] 1 g of the anti-fogging agent composition was placed in a moisture meter (OHAUS, MB120) and heated at 110°C. The end point was the point at which no weight loss was observed, and the residue was taken as the non-volatile content. The weight ratio of the residue to the anti-fogging agent composition was taken as the non-volatile content concentration.

[0074] [Viscosity measurement] The components constituting the anti-fogging agent were blended in the ratios shown in Tables 1 to 3, and heated to 70°C while stirring to achieve a uniform solution. Subsequently, ion-exchanged water was gradually added so that the non-volatile content was 10% by weight, to obtain a test solution. The test solution was then stored in a thermostatic chamber at 25°C for 2 hours, and the viscosity at 25°C was measured using a B-type viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.). The rotor and rotation speed were set as follows, depending on the viscosity of the 10% by weight aqueous dispersion: 1 to 100 mPa·s: Rotor No. 1, rotation speed 60 rpm 100 to 500 mPa·s: Rotor No. 2, rotation speed 60 rpm 500 to 2500 mPa·s: Rotor No. 2, rotation speed 12 rpm 2500 to 4000 mPa·s: Rotor No. 3, rotation speed 30 rpm 4000 mPa·s and above: Rotor No. 3, rotation speed 12 rpm Furthermore, when measuring the viscosity of an aqueous dispersion of an anti-fog agent containing a solvent and having a non-volatile content of 10% by weight, the solvent may be removed from the anti-fog agent, and then a test liquid having a non-volatile content of 10% by weight may be prepared in the same manner as described above, and the viscosity may be measured.

[0075] [Preparation of Resin Composition] <Polyethylene terephthalate (PET) sheet> Polyethylene terephthalate was melt-kneaded at 250°C in a single-screw extruder and extruded through a T-die. The extrudate extruded from the T-die was formed into a sheet with a thickness of 100 μm, and one side was subjected to corona treatment so that the wet tension was 49 to 50 mN / m, and then formed into a sheet. <Polystyrene (PS) sheet> Polystyrene was melt-kneaded at 240°C in a single-screw extruder and extruded through a T-die. The extrudate was then biaxially stretched at 130°C to a thickness of 200 μm, and one side was subjected to corona treatment so that the wet tension was 49 to 50 mN / m, forming it into a sheet. The wetting tension was measured using a mixture for wetting tension testing (measurement reagent manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.). <Polypropylene (PP) film> Polypropylene was melt-kneaded at 230°C in a single-screw extruder and extruded through a T-die. The extrudate extruded from the T-die was uniaxially stretched to a thickness of 20 μm, and one side was subjected to corona treatment so that the wet tension was 39 to 40 mN / m, and then molded into a film. The wetting tension was measured using a mixture for wetting tension testing (measurement reagent manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).

[0076] [Evaluation of low-temperature anti-fogging properties] 100g of tap water at 30°C was placed in a container measuring 120mm long x 85mm wide x 40mm deep, and the sample was placed over it with the anti-fog coated surface facing inward. The sample was then stored in an atmosphere at 5°C, and the state of water droplets adhering to the inner surface of the sample was visually observed after 1 hour. Evaluation was based on the following criteria, with ◯ and ⊚ representing passing. ◎: Almost no water droplets adhered, and the entire surface is wet with water 〇: There are water droplets attached, but visibility is good and the inside of the container is clearly visible △: There are many large water droplets and the inside of the container looks blurry ×: There are many small water droplets and the inside of the container cannot be seen

[0077] [High-temperature anti-fogging property evaluation] 100 g of 90°C tap water was placed in a container measuring 120 mm long x 85 mm wide x 40 mm deep, and the sample was placed on top with the anti-fog coated surface facing inward. The sample was then stored in a 23°C atmosphere. After 10 minutes, 1 hour, and 16 hours, the state of water droplets adhering to the inner surface of the sample was visually observed, and this was used as the first evaluation. The water in the container was then replaced with 90°C tap water, and the state of water droplets adhering to the inner surface of the sample was visually observed after 5 minutes and 10 minutes, and this was used as the second evaluation. Evaluation was based on the following evaluation criteria, with ◯ and ⊚ being considered pass. Furthermore, a pass rating after 10 minutes in the second evaluation indicates that the sample exhibited high anti-fog properties over a long period of time. ◎: Almost no water droplets adhered, and the entire surface is wet with water 〇: There are water droplets attached, but visibility is good and the inside of the container is clearly visible △: There are many large water droplets and the inside of the container looks blurry ×: There are many small water droplets and the inside of the container cannot be seen

[0078] [Transparency evaluation] A color difference and turbidity meter (Nippon Denshoku Industries, COH-300A) was used to measure the haze value of the sample and the haze value after rinsing the sample surface with ethanol. The difference in haze value between the sample before and after rinsing was taken as ΔHaze, which was used to evaluate transparency. Samples with a ΔHaze of 0.5 or less were considered to have passed the test.

[0079] The components described in Tables 1 to 3 were as follows. Coconut oil fatty acid diethanolamide (C12 or less): Amidation products of coconut fatty acid (8 to 18 carbon atoms) and diethanolamine, with an alkyl group having 12 or less carbon atoms Coconut oil fatty acid diethanolamide (C13 or more): Amidation products of coconut fatty acid (8 to 18 carbon atoms) and diethanolamine, with alkyl and alkenyl groups having 13 or more carbon atoms. Polyethylene glycol laurate: Ester of polyethylene glycol (weight average molecular weight 400) and lauric acid (molar ratio 1:1) Sucrose laurate: Sucrose monolaurate POE(7) Lauryl Alcohol Ether: Polyoxyethylene 7-mol Lauryl Alcohol Ether POE(12) Lauryl Alcohol Ether: Polyoxyethylene 12-mol Lauryl Alcohol Ether POE(15) Lauryl Alcohol Ether: Lauryl alcohol ether with 15 moles of polyoxyethylene added POE(15) Secondary alcohol (C=12-14) ether: 15 moles of polyoxyethylene adduct of secondary alcohol (C=12-14) ether POE(20) Sorbitan Laurate: Sorbitan monolaurate with 20 moles of polyoxyethylene added POE(40) Castor Oil Ether: Castor oil ether with 40 moles of polyoxyethylene added

[0080] [Production Example 1] 20 parts by weight of sorbitan monolaurate, 80 parts by weight of sorbitan monostearate, and 100 parts by weight of isopropyl alcohol were placed in a 500 ml beaker and heated to 50°C with stirring to dissolve uniformly. Thereafter, isopropyl alcohol was added so that the nonvolatile content became 40%, and an anti-fogging agent composition of Production Example 1 was obtained.

[0081] [Production Example 2] The same procedure as in Production Example 1 was carried out except that the components used were in the composition ratios shown in Table 1, to obtain an anti-fogging agent composition of Production Example 2.

[0082] [Production Example 3] 30 parts by weight of lauryldiethanolamine, 10 parts by weight of sorbitan monostearate, 30 parts by weight of POE(12) lauryl alcohol ether, and 75 parts by weight of sucrose laurate (30 parts by weight in terms of nonvolatile content) were placed in a 500 ml beaker and heated to 70°C with stirring to achieve a uniform solution. Thereafter, water was added while the temperature was raised as necessary to adjust the nonvolatile content to 40%, thereby obtaining an anti-fogging agent composition of Production Example 3.

[0083] [Production Examples 4 to 22] Antifogging agent compositions were obtained in the same manner as in Production Example 3, except that the components used were in the composition ratios shown in Tables 1 to 3.

[0084] Example 1 The anti-fogging agent composition of Production Example 1 was adjusted with isopropyl alcohol to a non-volatile content of 0.15% by weight. This diluted anti-fogging agent composition was applied to one side of a PET sheet using a bar coater to a thickness of 10 mg / m 2 The coating was then dried at 40°C to prepare test pieces, which were then evaluated. The evaluation results are shown in Table 4.

[0085] Example 10 Test pieces were prepared in the same manner as in Example 1, except that the antifogging agent composition used was that of Production Example 2 and the resin composition used was a PS sheet, and the test pieces were evaluated. The evaluation results are shown in Table 5.

[0086] Example 19 Test pieces were prepared in the same manner as in Example 1, except that the antifogging agent composition used was that of Production Example 2 and the resin composition used was a PP film, and the test pieces were evaluated. The evaluation results are shown in Table 6.

[0087] Example 2 The anti-fogging agent composition of Production Example 3 was adjusted with ion-exchanged water to a non-volatile content of 0.15% by weight. This diluted anti-fogging agent composition was applied to one side of a PET sheet using a bar coater to a thickness of 10 mg / m 2 The coating was then dried at 40°C to prepare test pieces, which were then evaluated. The evaluation results are shown in Table 4.

[0088] [Examples 3 to 9, 11 to 18, 20 to 27, Comparative Examples 1 to 12] Test pieces were prepared in the same manner as in Example 2 under the conditions of the anti-fog agent production examples, resin types, and coating amounts shown in Tables 4 to 6, and the test pieces were evaluated. The coating amount was adjusted by changing the bar coater type and the concentration of the diluted anti-fog agent composition to 0.15 to 2.5 wt %. The evaluation results are shown in Tables 4 to 6.

[0089] [Table 1]

[0090] [Table 2] [Table 3]

[0091] [Table 4]

[0092] [Table 5]

[0093] [Table 6]

[0094] The evaluation results shown in Tables 4 to 6 show that the resin compositions using the coating-type anti-fogging agent of the present invention all maintained high transparency, exhibited good low-temperature anti-fogging properties, and exhibited high anti-fogging properties over a long period of time. On the other hand, Comparative Examples 1 to 12 did not use the coating-type anti-fogging agent of the present invention, and therefore were unable to exhibit high anti-fogging properties over a long period of time.

Claims

1. A paint-type anti-fogging agent composition comprising: a nonionic surfactant (A) having an alkyl group having 6 to 12 carbon atoms and / or an alkenyl group having 6 to 12 carbon atoms; and a nonionic surfactant (B) having an alkyl group having 13 to 22 carbon atoms and / or an alkenyl group having 13 to 22 carbon atoms, wherein the surfactant (A) and the surfactant (B) each have an HLB of 3 or more and 12 or less.

2. the surfactant (A) comprises at least one selected from a fatty acid ester-type nonionic surfactant (A1) and a nitrogen-containing nonionic surfactant (A2), 2. The applied anti-fogging agent composition according to claim 1, wherein the surfactant (B) comprises at least one selected from the group consisting of a fatty acid ester-type nonionic surfactant (B1) and a nitrogen-containing nonionic surfactant (B2).

3. 3. The apply-type anti-fogging agent composition according to claim 2, wherein a weight ratio ((A1+A2) / (B1+B2)) of the total of the surfactant (A1) and the surfactant (A2) to the total of the surfactant (B1) and the surfactant (B2) is 2 / 98 to 98 / 2.

4. The paint-type antifogging agent composition according to claim 1 or 2, further comprising a surfactant (C) having an HLB of more than 12 and not more than 20.

5. 5. The apply-type anti-fogging agent composition according to claim 4, wherein a weight ratio ((A+B) / C) of the total of the surfactant (A) and the surfactant (B) to the surfactant (C) is 80 / 20 to 20 / 80.

6. 4. The anti-fogging composition according to claim 1, wherein the viscosity of the anti-fogging composition when dispersed in water with a non-volatile content of 10% by weight is 30 to 5000 mPa·s.

7. The anti-fogging agent composition according to any one of claims 1 to 3, which is for use with at least one resin selected from polyethylene terephthalate, polystyrene, and polypropylene.

8. The anti-fogging composition according to any one of claims 1 to 3, which contains water.

9. A resin composition obtained by applying the anti-fogging agent composition according to any one of claims 1 to 3 to a resin component.

10. The resin composition according to claim 9, wherein the resin component comprises at least one selected from polyethylene terephthalate, polystyrene, and polypropylene.

11. The resin composition according to claim 9 , which is in the form of a film or sheet.

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