Coatings, films, and pouches

Abstract

To provide a coating agent that exhibits excellent sliding properties for liquids (e.g., curry, sauce, ketchup, mayonnaise, feces, etc.) and can form a coating film (i.e., a coating layer) with suppressed clouding. [Solution] A polymer comprising a monomer unit containing a betaine structure and containing at least one of a silanol group and an alkoxysilyl group, At least one of an ionic liquid and an anionic surfactant, A coating agent comprising at least one of a hydrolyzable silane compound that does not have a betaine structure and its hydrolysate, The total content of the solids of the polymer and the active ingredients and / or surfactants is 100 parts by mass, and the active ingredients of the hydrolyzable silane compound and / or hydrolysates that do not have a betaine structure are included in an amount of 3 parts by mass or more and 80 parts by mass or less. Coating agent.

Description

[Technical Field]

[0001] This invention relates to coatings, films, and pouches. [Background technology]

[0002] A stoma is an artificial opening created in the abdominal wall through surgery or other means. A stoma is an opening created to expel waste from the body when a portion of the digestive tract (for example, the large intestine or rectum) or a portion of the urethra is removed.

[0003] The bag that receives waste discharged from a stoma is sometimes called a stoma pouch (hereinafter sometimes referred to as a "stoma appliance pouch"). When a certain amount of waste has accumulated in the stoma pouch, the waste may be emptied (for example, by flushing the waste down the toilet), and the pouch may be cleaned as needed before continuing to use it. Because waste, especially feces, is viscous, it takes some effort to remove feces from the stoma pouch.

[0004] To facilitate the removal of stool from the stoma pouch, it is known to form a functional layer containing functional particles (specifically, hydrophobic particles and / or oleophobic particles) on the inner surface of the stoma pouch (see Patent Document 1). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 6932547 [Patent Document 2] Patent No. 6467226 [Patent Document 3] International Publication No. 2021 / 241295 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, it can be difficult to manufacture stoma pouches by heat sealing using the stoma pouch film actually produced in Patent Document 1 (i.e., the stoma pouch film having a polyester film and a functional layer, produced in the example of Patent Document 1). This is because the stoma pouch film actually produced in Patent Document 1 has a fairly high content of functional particles in the functional layer, and therefore it is difficult to bond the functional layers together by heat sealing. In other words, it is difficult to bond the functional layers together with strong adhesive force by heat sealing.

[0007] On the other hand, to facilitate the removal of stool from the stoma pouch, it is conceivable to surface-treat the film with a fluorine compound that has low surface tension. However, it can be difficult to manufacture stoma pouches using heat-sealed films that have been surface-treated with fluorine compounds. This is because it is difficult to bond surfaces treated with fluorine compounds together with strong adhesive force through heat sealing.

[0008] Based on the above, it is worthwhile to propose a new technology that can make it easier to remove stool from a stoma pouch.

[0009] Incidentally, depending on the application of the pouch, it may be required that it be easy to dispense viscous, fluid substances such as curry, sauce, ketchup, and mayonnaise (hereinafter sometimes referred to as "fluids"). Thus, depending on the application of the pouch or film, it may be required that the fluid slides off easily, in other words, that it has good sliding properties. Furthermore, durability of that sliding property may also be required.

[0010] The present invention aims to provide a coating agent capable of forming a coating film (i.e., a coating layer) that has excellent sliding properties for liquids (e.g., curry, sauce, ketchup, mayonnaise, feces, etc.) and suppresses clouding. The present invention also aims to provide a film or pouch containing a coating layer that has excellent sliding properties and durability for liquids and suppresses clouding. [Means for solving the problem]

[0011] To solve this problem, the present invention comprises the configuration described in [1] below. [1] A polymer comprising a monomer unit containing a betaine structure and containing at least one of a silanol group and an alkoxysilyl group, At least one of an ionic liquid and an anionic surfactant, A coating agent comprising at least one of a hydrolyzable silane compound that does not have a betaine structure and its hydrolysate, The total content of the solids of the polymer and the active ingredients and / or surfactants is 100 parts by mass, and the active ingredients of the hydrolyzable silane compound and / or hydrolysates that do not have a betaine structure are included in an amount of 3 parts by mass or more and 80 parts by mass or less. Coating agent.

[0012] According to [1], the coating agent contains a polymer containing monomer units containing a betaine structure, which allows it to form a coating film, i.e., a coat layer, that has excellent sliding properties for fluids (e.g., curry, sauce, ketchup, mayonnaise, feces, etc.). This will be explained. The betaine polymer contains monomer units containing a betaine structure, which allows it to form a coating film with excellent hydrophilicity. This coating film can absorb moisture from fluids and swell when it comes into contact with them. Therefore, this coating film can form a lubricated surface when it comes into contact with fluids. Because this surface is lubricated, it has excellent sliding properties for fluids. Thus, according to the coating agent in [1], it is possible to form a coating film, i.e., a coat layer, that has excellent sliding properties for fluids.

[0013] Furthermore, since the coating agent contains an ionic liquid and / or anionic surfactant, it can suppress or reduce the clouding of the coating film. This will be explained. Betaine polymers tend to have high cohesive force because they contain monomer units that include a betaine structure, and therefore the cohesive force of the coating film also tends to be high. As a result, coating films containing betaine polymers tend to become cloudy. In contrast, according to [1], an ionic liquid can closely interact with the betaine polymer, and therefore the cohesive force between the betaine polymers can be relaxed. Therefore, according to the coating agent in [1], clouding in the coating film can be suppressed or reduced.

[0014] Furthermore, the betaine polymer contains at least one of a silanol group and an alkoxysilyl group. The coating agent contains a hydrolyzable silane compound or its hydrolysate. Because the coating agent contains a hydrolyzable silane compound or its hydrolysate, the elution of coating components into water is suppressed, and durability is increased. This will be explained. Because the betaine polymer contains monomer units with a betaine structure, it has high solubility in water and easily migrates to the fluid it comes into contact with. Since the betaine polymer has reactive groups of silanol groups and / or alkoxysilyl groups, it is incorporated into the crosslinking by chemically bonding with the hydrolyzable silane compound. Because the crosslinked betaine polymer is poorly soluble in water, it is less likely to migrate to the fluid it comes into contact with. Therefore, according to the coating agent of this embodiment, the durability of slip resistance can be improved.

[0015] The present invention prefers the configurations described in [2] to

[13] below. [2] The polymer is formed by polymerizing at least a monomer represented by formula I, [ka] In the above equation I, R 1 R is a (meth)acryloylaminoalkyl group having 1 to 4 carbon atoms in the alkyl group, or a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group,2 and R 3 Each of these is independently a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, or an alkyl group with 1-C4 carbon atoms (meth)acryloyloxyalkyl group, and R 4 This is an alkylene group having 1 to 4 carbon atoms, or an oxyalkylene group having 1 to 4 carbon atoms. [1] The coating agent described above. [3] The coating agent according to [1] or [2], further comprising a silicone-based leveling agent. [4] The coating agent according to [3], wherein the silicone-based leveling agent is a polyether-modified silicone oil. [5] A coating agent according to any one of [1] to [4], further comprising an alcohol-based solvent. [6] A coating agent according to any of [1] to [5], further comprising an acid. [7] A coating agent according to any of [1] to [6], further containing water. [8] A coating agent according to any one of [1] to [7], used for coating a substrate film. [9] A base film and The substrate film comprises a coating layer formed on the substrate film with a coating agent described in any of [1] to [8], film.

[10] The film according to [9], wherein the base film comprises at least one of polyolefin and polyester.

[11] The film described in [9] or

[10] , used as a packaging film.

[12] A film used as a pouch film, as described in any of [9] to

[11] .

[13] A pouch containing the film described in any of [9] to

[12] .

[14] The pouch according to

[13] , which is a stoma pouch.

[0016] The following configurations of the present invention are also preferable.

[15] The London dispersion force term δ of the Hansen solubility parameter (HSP) in the ionic liquid d is 10.0 MPa 1 / 2 or more and 18.3 MPa 1 / 2 or less, the dipole-dipole force term δ p is 10.0 MPa 1 / 2 or more and 20.0 MPa 1 / 2 or less, and the hydrogen bonding force term δ h is 14.0 MPa 1 / 2 or less, the coating agent, film, or pouch according to any one of the above configurations.

[16] R 1 is a (meth)acryloylaminoalkyl group having 1 to 4 carbon atoms in the alkyl group, the coating agent, film, or pouch according to any one of the above configurations.

[17] R 1 is a methacryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group, the coating agent, film, or pouch according to any one of the above configurations.

[18] R 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms, the coating agent, film, or pouch according to any one of the above configurations.

[19] R 4 is an alkylene group having 1 to 4 carbon atoms, the coating agent, film, or pouch according to any one of the above configurations.

[20] A coating agent, film, or pouch according to any of the above configurations, wherein the solid content of the betaine polymer in the coating agent is 30% by mass or more and 90% by mass or less when the total content of the solid content of the betaine polymer, the active ingredient of the ionic liquid, and the solid content of the anionic surfactant is taken as 100% by mass. [twenty one] A coating agent, film, or pouch according to any of the above configurations, wherein the solid content of the betaine polymer in the coating agent is 30% by mass or more and 90% by mass or less, when the total content of the solid content of the betaine polymer and the active ingredients of the ionic liquid is taken as 100% by mass. [twenty two] A coating agent, film, or pouch according to any of the above configurations, wherein the solid content of the betaine polymer in the coating agent is 30% by mass or more and 90% by mass or less, when the total content of the solid content of the betaine polymer and the solid content of the anionic surfactant is taken as 100% by mass. [twenty three] A coating agent, film, or pouch according to any of the above configurations, wherein the ionic liquid contains a bis(fluorosulfonyl)imide anion. [twenty four] A coating agent, film, or pouch according to any of the above configurations, wherein the ionic liquid contains a 1-ethyl-3-methylimidazolium cation. [twenty five] A coating agent, film, or pouch according to any of the above configurations, wherein the ionic liquid contains ammonium cations.

[26] A coating agent, film, or pouch according to any of the above configurations, wherein the ionic liquid contains an N,N-dimethyl-N,N-dihydroxyethylammonium cation.

[27] A coating agent, film, or pouch according to any of the above configurations, wherein the anionic surfactant comprises an alkyl sulfate or an alkyl diphenyl ether disulfonate.

[28] A film or pouch according to any of the above configurations, wherein the thickness of the coating layer is 0.05 μm or more and 10 μm or less. [Effects of the Invention]

[0017] The present invention provides a coating agent capable of forming a coating film (i.e., a coating layer) that has excellent sliding properties for fluids (e.g., curry, sauce, ketchup, mayonnaise, feces, etc.) and suppresses or reduces clouding. The present invention also provides films and pouches containing a coating layer that has excellent sliding properties and durability for fluids and suppresses or reduces clouding. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described in detail below.

[0019] <1. Coating agent> <1.1. Betaine Polymer> The coating agent of this embodiment contains a polymer containing monomer units with a betaine structure, i.e., a betaine polymer. Because the coating agent of this embodiment contains a betaine polymer, it can form a coating film, i.e., a coat layer, that has excellent sliding properties for fluids (for example, curry, sauce, ketchup, mayonnaise, feces, etc.). This will be explained. Because the betaine polymer contains monomer units with a betaine structure, it can form a coating film with excellent hydrophilicity. This coating film can absorb moisture from fluids and swell when it comes into contact with them. Therefore, this coating film can form a lubricated surface when it comes into contact with fluids. Because this surface is lubricated, it has excellent sliding properties for fluids. Thus, the coating agent of this embodiment can form a coating film, i.e., a coat layer, that has excellent sliding properties for fluids.

[0020] A betaine polymer can be a polymer in which at least betaine monomers are polymerized. That is, a betaine polymer can be a polymer in which monomers containing betaine monomers are polymerized.

[0021] Examples of betaine monomers include sulfoxybetaine monomer, carboxybetaine monomer, and phosphorylbetaine monomer. Of these, sulfoxybetaine monomer is preferred. These may be used individually or in combination of two or more.

[0022] The betaine monomer preferably contains a (meth)acryloyl group. Here, "(meth)acryloyl" means "acryloyl" or "methacryloyl". When the betaine monomer contains a (meth)acryloyl group, the betaine polymer can be an acrylic polymer.

[0023] As a sulfoxybetaine monomer containing a (meth)acryloyl group, the monomer represented by formula I is preferred because it is readily available. [ka] In equation I, R 1 This is a (meth)acryloylaminoalkyl group with 1 to 4 carbon atoms in the alkyl group, or a (meth)acryloyloxyalkyl group with 1 to 4 carbon atoms in the alkyl group. 2 and R 3 Each of these is independently a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, or a C1-C4 (meth)acryloyloxyalkyl group. 4 This is an alkylene group having 1 to 4 carbon atoms, or an oxyalkylene group having 1 to 4 carbon atoms.

[0024] R 1The alkyl group is a (meth)acryloylaminoalkyl group having 1 to 4 carbon atoms, or a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms. Examples of (meth)acryloylaminoalkyl groups having 1 to 4 carbon atoms include (meth)acryloylaminomethyl group, (meth)acryloylaminoethyl group, (meth)acryloylaminopropyl group, and (meth)acryloylaminobutyl group. Examples of (meth)acryloyloxyalkyl groups having 1 to 4 carbon atoms include (meth)acryloyloxymethyl group, (meth)acryloyloxyethyl group, (meth)acryloyloxypropyl group, and (meth)acryloyloxybutyl group. Among these, (meth)acryloyloxyalkyl groups having 1 to 4 carbon atoms are preferred, and methacryloyloxyalkyl groups having 1 to 4 carbon atoms are more preferred.

[0025] R 2 and R 3 Each of these is independently a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, or a C1-C4 (meth)acryloyloxyalkyl group. Examples of C1-C4 alkyl groups include methyl, ethyl, propyl (e.g., n-propyl, i-propyl), and butyl (e.g., n-butyl, i-butyl, s-butyl, t-butyl, cyclobutyl). Examples of C1-C4 hydroxyalkyl groups include hydroxymethyl, hydroxyethyl, hydroxypropyl, and hydroxybutyl groups. Examples of C1-C4 (meth)acryloyloxyalkyl groups include (meth)acryloylaminomethyl, (meth)acryloylaminoethyl, (meth)acryloylaminopropyl, and (meth)acryloylaminobutyl groups. Among these, C1-C4 alkyl groups are preferred.

[0026] R 4This is an alkylene group having 1 to 4 carbon atoms, or an oxyalkylene group having 1 to 4 carbon atoms. Examples of alkylene groups having 1 to 4 carbon atoms include methylene, ethylene, propylene, and butylene. Examples of oxyalkylene groups having 1 to 4 carbon atoms include oxymethylene, oxyethylene, oxypropylene, and oxybutylene. Among these, alkylene groups having 1 to 4 carbon atoms are preferred.

[0027] In equation I, R 1 However, the alkyl group is a (meth)acryloyloxyalkyl group with 1 to 4 carbon atoms, and R 2 and R 3 However, each is independently an alkyl group having 1 to 4 carbon atoms, and R 4 However, it is preferable that it be an alkylene group having 1 to 4 carbon atoms. 1 However, the alkyl group is a methacryloyloxyalkyl group with 1 to 4 carbon atoms, R 2 and R 3 However, each is independently an alkyl group having 1 to 4 carbon atoms, and R 4 However, an alkylene group having 1 to 4 carbon atoms is also preferred. As a specific example of the monomer represented by formula I, i.e., the sulfoxybetaine monomer represented by formula I, for example, the compound exemplified as a sulfoxybetaine monomer in Patent Document 2 (i.e., Japanese Patent No. 6467226) can be cited.

[0028] An example of a carboxybetaine monomer is the monomer represented by formula II. [ka] In equation II, R 5 and R 6 Each of these is independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. 7 R is a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group. 8 This is an alkylene group having 1 to 4 carbon atoms.

[0029] R 5 and R 6 Each of these is independently either a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Examples of alkyl groups having 1 to 4 carbon atoms include the methyl group, ethyl group, propyl group, and butyl group.

[0030] R 7 This is a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group. Examples of (meth)acryloyloxyalkyl groups having 1 to 4 carbon atoms in the alkyl group include (meth)acryloyloxymethyl group, (meth)acryloyloxyethyl group, (meth)acryloyloxypropyl group, and (meth)acryloyloxybutyl group.

[0031] R 8 These are alkylene groups having 1 to 4 carbon atoms. Examples of alkylene groups having 1 to 4 carbon atoms include the methylene group, ethylene group, propylene group, and butylene group.

[0032] An example of a phosphoryl betaine monomer is the monomer represented by formula III. [ka] In Equation III, R 9 R is a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group. 10 R is an alkylene group having 1 to 4 carbon atoms. 11 , R 12 and R 13 Each of these is independently either a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

[0033] R 9This refers to a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group. Examples of (meth)acryloyloxyalkyl groups having 1 to 4 carbon atoms in the alkyl group include (meth)acryloyloxymethyl group, (meth)acryloyloxyethyl group, (meth)acryloyloxypropyl group, and (meth)acryloyloxybutyl group.

[0034] R 10 These are alkylene groups having 1 to 4 carbon atoms. Examples of alkylene groups having 1 to 4 carbon atoms include the methylene group, ethylene group, propylene group, and butylene group.

[0035] R 11 , R 12 and R 13 Each of these is independently either a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Examples of alkyl groups having 1 to 4 carbon atoms include the methyl group, ethyl group, propyl group, and butyl group.

[0036] Betaine polymers may contain monomer units other than those containing a betaine structure. In other words, betaine polymers may be polymers in which monomers other than betaine monomers are polymerized.

[0037] Other monomers besides betaine monomers include, for example, styrene, α-hydroxystyrene, p-hydroxystyrene, methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, neopentyl (meth)acrylate, cyclohexyl (meth)acrylate, benzyl (meth)acrylate, octyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, cetyl (meth)acrylate, ethyl carbitol (meth)acrylate, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, hydroxybutyl (meth)acrylate, and (meth) Examples include methoxyethyl acrylate, methoxybutyl (meth)acrylate, N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-propyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, N-tert-butyl(meth)acrylamide, N-octyl(meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, (meth)acryloylmorpholine, diacetone(meth)acrylamide, styrene, methyl itaconate, ethyl itaconate, vinyl acetate, vinyl propionate, N-vinylpyrrolidone, and N-vinylcaprolactam. These may be used individually or in combination of two or more.

[0038] When the total monomer units in a betaine polymer are considered to be 100 mol%, the monomer units containing the betaine structure are preferably 80 mol% or more, more preferably 90 mol% or more, and even more preferably 95 mol% or more.

[0039] The betaine polymer preferably contains at least one of a silanol group and an alkoxysilyl group. The inclusion of at least one of these groups allows the betaine polymers to crosslink with each other, as well as with hydrolyzable silane compounds and / or their hydrolysates that do not have a betaine structure. Therefore, the durability of the coating film can be improved, and the durability of the slip resistance can be enhanced.

[0040] To obtain a betaine polymer containing at least one of a silanol group and an alkoxysilyl group, for example, a monomer containing a betaine monomer may be polymerized in the presence of a chain transfer agent containing a compound containing an alkoxysilyl group.

[0041] An example of a compound containing an alkoxysilyl group is the compound represented by formula IV. [ka] In equation IV, R 14 , R 15 and R 16 Each of these is independently an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and R 14 , R 15 and R 16 At least one of them is an alkoxy group having 1 to 4 carbon atoms. 17 This represents an alkylene group with 1 to 12 carbon atoms.

[0042] R 14 , R 15 and R 16Each of these is independently an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. Examples of alkyl groups having 1 to 4 carbon atoms include methyl, ethyl, propyl, and butyl groups. Examples of alkoxy groups having 1 to 4 carbon atoms include methoxy, ethoxy, propoxy (e.g., n-propoxy, i-propoxy), and butoxy (e.g., n-butoxy, i-butoxy, s-butoxy, and t-butoxy groups).

[0043] R 14 , R 15 and R 16 At least one of them is an alkoxy group having 1 to 4 carbon atoms. 14 , R 15 and R 16 Preferably, at least one of them is a methoxy group.

[0044] R 14 , R 15 and R 16 Preferably, at least two of these are alkoxy groups having 1 to 4 carbon atoms. It is believed that having at least two alkoxy groups having 1 to 4 carbon atoms can further improve the durability of the coating film. 14 , R 15 and R 16 It is more preferable that at least two of these are methoxy groups.

[0045] R 14 , R 15 and R 16 It is preferable that all of these are alkoxy groups having 1 to 4 carbon atoms. It is believed that if all of these are alkoxy groups having 1 to 4 carbon atoms, the durability of the coating film can be further improved. 14 , R 15 and R 16 It is more preferable that all of them are methoxy groups.

[0046] R 17This represents an alkylene group having 1 to 12 carbon atoms. The number of carbon atoms in the alkylene group is preferably 2 or more, more preferably 3 or more. The number of carbon atoms in the alkylene group is preferably 6 or less, more preferably 4 or less, and even more preferably 3. Examples of alkylene groups having 1 to 12 carbon atoms include a methylene group, an ethylene group, a propylene group, and a butylene group.

[0047] As an example of a compound represented by formula IV, 3-mercaptopropyltrimethoxysilane can be given.

[0048] The amount of compound containing an alkoxysilyl group added is preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, and even more preferably 0.3 parts by mass or more, per 100 parts by mass of the monomer. On the other hand, the amount of compound containing an alkoxysilyl group added may be, for example, 5.0 parts by mass or less, 3.0 parts by mass or less, 2.0 parts by mass or less, or 1.0 part by mass or less.

[0049] It is preferable to polymerize the monomers in the presence of a polymerization initiator. Examples of polymerization initiators include azoisobutyronitrile, methyl azoisobutyrate, azobisdimethylvaleronitrile, benzoyl peroxide, potassium persulfate, ammonium persulfate, benzophenone derivatives, phosphine oxide derivatives, benzoketone derivatives, phenylthioether derivatives, azide derivatives, diazo derivatives, and disulfide derivatives. These may be used individually or in combination of two or more.

[0050] The amount of polymerization initiator added can be, for example, 0.01 to 5 parts by mass per 100 parts by mass of monomer.

[0051] Solution polymerization is one example of a polymerization method. Suitable solvents for solution polymerization include, for example, alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol, and propylene glycol; ketones such as acetone and methyl ethyl ketone; ethers such as diethyl ether and tetrahydrofuran; aromatic hydrocarbon compounds such as benzene, toluene, and xylene; aliphatic hydrocarbon compounds such as n-hexane; alicyclic hydrocarbon compounds such as cyclohexane; acetate esters such as methyl acetate and ethyl acetate; and water. These can be used individually or in combination of two or more. The monomer concentration, polymerization temperature, and polymerization time can be set as appropriate. Polymerization may also be carried out under an inert gas. Examples of inert gases include nitrogen gas and argon gas.

[0052] The weight-average molecular weight of the betaine polymer is preferably 10,000 or more, and more preferably 50,000 or more. On the other hand, the weight-average molecular weight of the betaine polymer may be, for example, 1,000,000 or less, or 500,000 or less. The weight-average molecular weight of the betaine polymer is a value measured by gel permeation chromatography.

[0053] In the coating agent of this embodiment, the solid content of the betaine polymer is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, and even more preferably 60% by mass or more, when the total content of the solid content of the betaine polymer and the active ingredients and / or anionic surfactants of the ionic liquid is taken as 100% by mass. When the content is 30% by mass or more, a coating film with even better hydrophilicity and slipperiness can be formed. The betaine polymer content may be, for example, 70% by mass or more, or 80% by mass or more. On the other hand, in the coating agent of this embodiment, the solid content of the betaine polymer is preferably 93% by mass or less, more preferably 90% by mass or less, even more preferably 87% by mass or less, and even more preferably 85% by mass or less, when the total content of the solid content of the betaine polymer and the active ingredients and / or anionic surfactants of the ionic liquid is taken as 100% by mass. When the content is 93% by mass or less, whitening in the coating film can be further suppressed or reduced.

[0054] <1.2. Ionic Liquids> The coating agent of this embodiment contains an ionic liquid. Because the coating agent contains an ionic liquid, it is possible to suppress or reduce clouding in the coating film. This will be explained. Betaine polymers contain monomer units that include a betaine structure, and therefore tend to have high cohesive force, and consequently, the cohesive force of the coating film also tends to be high. Therefore, clouding may occur in coating films containing betaine polymers. In contrast, according to this embodiment, the ionic liquid and / or anionic surfactant can interact closely with the betaine polymer, and therefore the cohesive force between the betaine polymers can be mitigated. For this reason, the coating agent of this embodiment can suppress or reduce clouding in the coating film.

[0055] London dispersion force term δ of Hansen solubility parameter (HSP) in ionic liquids d 10.0 MPa 1 / 2 The above is 18.3 MPa. 1 / 2 The following is the inter-dipole force term δ p 10.0 MPa 1 / 220.0 MPa or less 1 / 2 and the hydrogen bonding term δ h is 14.0 MPa 1 / 2 or less, which is preferable. This can suppress or reduce the cloudiness of the coating layer that may occur due to the aggregation of the betaine polymer, and can further suppress or reduce the cloudiness in the coating film. This will be explained below. The London dispersion force term δ d of the ionic liquid is 10.0 MPa 1 / 2 or more and 18.3 MPa 1 / 2 or less, the dipole-dipole force term δ p is 10.0 MPa 1 / 2 or more and 20.0 MPa 1 / 2 or less, and the hydrogen bonding term δ h is 14.0 MPa 1 / 2 or less. Therefore, this ionic liquid has excellent compatibility with the betaine polymer, and thus can suppress or reduce the aggregation of the betaine polymer. As a result, the cloudiness of the coating film that may occur due to the aggregation of the betaine polymer can be suppressed or reduced, and the cohesive force between the betaine polymers can be further relaxed. Therefore, this ionic liquid can suppress or reduce the cloudiness of the coating layer that may occur due to the aggregation of the betaine polymer, and can further suppress or reduce the cloudiness in the coating film.

[0056] Here, the Hansen solubility parameter (HSP) means a parameter of a vector quantity obtained by dividing the solubility parameter of Hildebrand into three cohesive energy components of London dispersion force, dipole-dipole force, and hydrogen bonding force. Here, the component corresponding to the London dispersion force of HSP is called the dispersion term δ d , or sometimes called the London dispersion force term δ d . The component corresponding to the dipole-dipole force of HSP is called the polar term δ p , or sometimes called the dipole-dipole force term δ p . The component corresponding to the hydrogen bonding force of HSP is called the hydrogen bonding term δ<s h , or sometimes called the hydrogen bonding force term δ h .

[0057] HSP can be determined by the Hansen lysis sphere method. In the Hansen lysis sphere method, first, the sample (specifically an ionic liquid) is mixed with various solvents for which the HSP is known, and it is determined whether the sample has dissolved in each solvent. Next, the London dispersion force term δ is calculated. d , dipole-dipole force term δ p , and hydrogen bonding force term δ h In a three-dimensional space with the axis, the London dispersion force term δ of these solvents d , dipole-dipole force term δ p , and hydrogen bonding force term δ h These are plotted. Based on the resulting 3D graph, the smallest sphere, the Hansen dissolution sphere, is created that includes the coordinates of the solvent in which the sample dissolved (i.e., the good solvent) and does not include the coordinates of the solvent in which the sample did not dissolve (i.e., the poor solvent). The coordinates of the center of the Hansen dissolution sphere can be determined as the HSP of the sample. Specifically, the HSP is determined by the method described in the examples below.

[0058] HSP London dispersion force term δ d 11.0 MPa 1 / 2 The above is preferable, and 11.5 MPa 1 / 2 The above is more preferable. On the other hand, the London dispersion force term δ d For example, 17.0 MPa 1 / 2 The following is also acceptable: 16.0 MPa 1 / 2 The following is also acceptable.

[0059] The inter-dipole force term δ of HSP p For example, 11.0 MPa 1 / 2 It may be greater than or equal to 13.0 MPa. 1 / 2 The above is also acceptable. On the other hand, the inter-dipole force term δ p For example, 19.5 MPa 1 / 2 The following is also acceptable: 19.0 MPa 1 / 2 The following is also acceptable.

[0060] Hydrogen bonding force term δ of HSP h 6.0 MPa 1 / 2 The above is preferable, 7.0 MPa 1 / 2 The above is more preferable. On the other hand, the hydrogen bonding force term δh For example, 13.5 MPa 1 / 2 The following is also acceptable: 13.0 MPa 1 / 2 The following is also acceptable.

[0061] Ionic liquids contain cations and anions. The combination of cations and anions is such that the ionic liquid satisfies the requirement of a melting point of 100°C or below. This is because ionic liquids are salts with a melting point of 100°C or below. Furthermore, because ionic liquids become liquid at relatively low temperatures compared to general inorganic salts, they are sometimes called low-melting-point molten salts. Methods for synthesizing ionic liquids include, for example, anion exchange, acid esterification, and neutralization.

[0062] The anions in an ionic liquid may be inorganic or organic anions. Specifically, as an anion, for example, Cl - , Br - , I - AlCl4 - Al2Cl7 - BF4 - PF6 - ClO4 - NO3 - CH3COO - CF3COO - CH3SO3 - CF3SO3 - , C4F9SO3 - (CF3SO2)2N - (C2F5SO2)2N - , (C3F7SO2)2N - (C4F9SO2)2N - , (CF3SO2)3C - AsF6 - SbF6 - , NbF6 - TaF6 - , F(HF) n - , (CN)2N - , C4F9SO3 - (C2F5SO2)2N - C3F7COO -(CF3SO2)(CF3CO)N - C9H 19 COO - (CH3)2PO4 - (C2H5)2PO4 - ,C2H5OSO3 - , C6H 13 OSO3 - C8H 17 OSO3 - CH3(OC2H4)2OSO3 - C6H4(CH3)SO3 - (C2F5)3PF3 - CH3CH(OH)COO - , (FSO2)2N - These can be cited as examples. In particular, (FSO2)2N is chosen because of its excellent compatibility with betaine polymers. - Therefore, a bis(fluorosulfonyl)imide anion (hereinafter sometimes referred to as "FSI") is preferred.

[0063] For example, as a cation in an ionic liquid, Pyridinium cations such as 1-ethylpyridinium cation, 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-butyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, 1-hexyl-3-methylpyridinium cation, and 1-butyl-3,4-dimethylpyridinium cation; Pyrrolidinium cations such as 1,1-dimethylpyrrolidinium cation, 1-ethyl-1-methylpyrrolidinium cation, 1-methyl-1-propylpyrrolidinium cation, 1-methyl-1-butylpyrrolidinium cation, 1-methyl-1-pentylpyrrolidinium cation, 1-methyl-1-hexylpyrrolidinium cation, 1-methyl-1-heptylpyrrolidinium cation, 1-ethyl-1-propylpyrrolidinium cation, 1-ethyl-1-butylpyrrolidinium cation, 1-ethyl-1-pentylpyrrolidinium cation, 1-ethyl-1-hexylpyrrolidinium cation, 1-ethyl-1-heptylpyrrolidinium cation, 1,1-dipropylpyrrolidinium cation, 1-propyl-1-butylpyrrolidinium cation, 1,1-dibutylpyrrolidinium cation, and pyrrolidinium-2-one cation; Piperidinium cations such as 1-propylpiperidinium cation, 1-pentylpiperidinium cation, 1,1-dimethylpiperidinium cation, 1-methyl-1-ethylpiperidinium cation, 1-methyl-1-propylpiperidinium cation, 1-methyl-1-butylpiperidinium cation, 1-methyl-1-pentylpiperidinium cation, 1-methyl-1-hexylpiperidinium cation, 1-methyl-1-heptylpiperidinium cation, 1-ethyl-1-propylpiperidinium cation, 1-ethyl-1-butylpiperidinium cation, 1-ethyl-1-pentylpiperidinium cation, 1-ethyl-1-hexylpiperidinium cation, 1-ethyl-1-heptylpiperidinium cation, 1,1-dipropylpiperidinium cation, 1-propyl-1-butylpiperidinium cation, and 1,1-dibutylpiperidinium cation; Cations having a pyrroline skeleton, such as 2-methyl-1-pyrroline cations; Cations having a pyrrole skeleton, such as 1-ethyl-2-phenylindole cation, 1,2-dimethylindole cation, and 1-ethylcarbazole cation; Morpholinium cations such as N-ethyl-N-methylmorpholinium cation; 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, 1-ethyl-3-methylimidazolium cation, 1-butyl-3-methylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-decyl-3-methylimidazolium cation, 1-dodecyl-3-methylimidazolium cation, 1-tetradecyl-3-methyl Imidazolium cations such as midazolium cation, 1,2-dimethyl-3-propylimidazolium cation, 1-ethyl-2,3-dimethylimidazolium cation, 1-butyl-2,3-dimethylimidazolium cation, 1-hexyl-2,3-dimethylimidazolium cation, 1-(2-methoxyethyl)-3-methylimidazolium cation, and 1,3-dimethyl-1,4,5,6-tetrahydropyrimidinium cation; Tetrahydropyrimidinium cations such as 1,2,3-trimethyl-1,4,5,6-tetrahydropyrimidinium cation, 1,2,3,4-tetramethyl-1,4,5,6-tetrahydropyrimidinium cation, and 1,2,3,5-tetramethyl-1,4,5,6-tetrahydropyrimidinium cation; Dihydropyrimidinium cations such as 1,3-dimethyl-1,4-dihydropyrimidinium cation, 1,3-dimethyl-1,6-dihydropyrimidinium cation, 1,2,3-trimethyl-1,4-dihydropyrimidinium cation, 1,2,3-trimethyl-1,6-dihydropyrimidinium cation, 1,2,3,4-tetramethyl-1,4-dihydropyrimidinium cation, and 1,2,3,4-tetramethyl-1,6-dihydropyrimidinium cation; Pyrazolium cations such as 1-methylpyrazolium cation, 3-methylpyrazolium cation, 1-ethyl-2,3,5-trimethylpyrazolium cation, 1-propyl-2,3,5-trimethylpyrazolium cation, and 1-butyl-2,3,5-trimethylpyrazolium cation; Pyrazolinium cations such as 1-ethyl-2-methylpyrazolinium cation, 1-ethyl-2,3,5-trimethylpyrazolinium cation, 1-propyl-2,3,5-trimethylpyrazolinium cation, and 1-butyl-2,3,5-trimethylpyrazolinium cation; Trialkylsulfonium cations such as trimethylsulfonium cation, triethylsulfonium cation, tributylsulfonium cation, trihexylsulfonium cation, diethylmethylsulfonium cation, dibutylethylsulfonium cation, and dimethyldecylsulfonium cation; Tetraalkylphosphonium cations such as tetramethylphosphonium cation, tetraethylphosphonium cation, tetrabutylphosphonium cation, tetrahexylphosphonium cation, tetraoctylphosphonium cation, triethylmethylphosphonium cation, tributylethylphosphonium cation, trimethyldecylphosphonium cation, and tributyl-(2-methoxyethyl)phosphonium cation; Tetramethylammonium cation, tetraethylammonium cation, tetrabutylammonium cation, tetrapentylammonium cation, tetrahexylammonium cation, tetraheptylammonium cation, triethylmethylammonium cation, tributylethylammonium cation, trimethyldecylammonium cation, N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium cation, glycidyltrimethylammonium cation, diallyldimethylammonium cation, N,N-dimethyl-N-ethyl-N-propylammonium cation, N,N-dimethyl-N-ethyl-N-butylammonium cation, N,N-dimethyl-N-ethyl-N-pentylammonium cation, N,N-dimethyl-N-ethyl-N-heptylammonium cation, N,N-dimethyl-N-ethyl-N-nonylammonium cation, N,N-dimethyl-N,N-dipropylammonium cation, N,N-diethyl-N-propyl-N-butylammonium cation, N,N- Dimethyl-N-propyl-N-pentylammonium cation, N,N-dimethyl-N-propyl-N-hexylammonium cation, N,N-dimethyl-N-propyl-N-heptylammonium cation, N,N-dimethyl-N-butyl-N-hexylammonium cation, N,N-diethyl-N-butyl-N-heptylammonium cation, N,N-dimethyl-N-pentyl-N-hexylammonium cation, N,N-dimethyl-N,N-dihexylammonium cation, trimethylheptylammonium cation, N,N-diethyl N,N-methyl-N-propylammonium cation, N,N-diethyl-N-methyl-N-pentylammonium cation, N,N-diethyl-N-methyl-N-heptylammonium cation, N,N-diethyl-N-propyl-N-pentylammonium cation, triethylpropylammonium cation, triethylpentylammonium cation, triethylheptylammonium cation, N,N-dipropyl-N-methyl-N-ethylammonium cation, N,N-dipropyl-N-methyl-N-pentylammonium cation, N,Ammonium cations such as N-dipropyl-N-butyl-N-hexylammonium cation, N,N-dipropyl-N,N-dihexylammonium cation, N,N-dibutyl-N-methyl-N-pentylammonium cation, N,N-dibutyl-N-methyl-N-hexylammonium cation, trioctylmethylammonium cation, N-methyl-N-ethyl-N-propyl-N-pentylammonium cation, and N,N-dimethyl-N,N-dihydroxyethylammonium cation; These can be listed as follows. Among them, imidazolium cations and ammonium cations are preferred from the viewpoint of high compatibility with betaine polymers, and 1-ethyl-3-methylimidazolium cation (hereinafter sometimes referred to as "EMIM") and N,N-dimethyl-N,N-dihydroxyethylammonium cation (hereinafter sometimes referred to as "DDEA") are more preferred.

[0064] As a specific example of an ionic liquid, a combination of N,N-dimethyl-N,N-dihydroxyethylammonium cation (i.e., DDEA) and FSI is more preferable from the viewpoint of excellent compatibility with betaine polymers. Note that the ionic liquid may be used alone or in combination of two or more types.

[0065] <1.3. Ionic surfactants> The coating agent of this embodiment preferably contains an ionic surfactant. More preferably, it contains an anionic surfactant. Furthermore, the coating agent of this embodiment contains an ionic surfactant with a molecular weight of less than 1000, specifically the London dispersion force term δ in the Hansen solubility parameter (HSP). d The value is between 10.0 and 18.3, and the inter-dipole force term δ p The hydrogen bonding force term δ is between 10.0 and 20.0. h It is preferable to include an ionic surfactant with a molecular weight of less than 1000, where the ratio is 14.0 or less.

[0066] The explanation of HSP for ionic surfactants is omitted because it overlaps with the explanation above (i.e., the explanation of HSP for ionic liquids). Therefore, the explanation of HSP for ionic liquids can also be used as an explanation of HSP for ionic surfactants.

[0067] Ionic surfactants have a molecular weight of less than 1000. Ionic surfactants with a molecular weight of less than 1000 have the advantage of being diverse in type and therefore offering a wide range of choices.

[0068] Examples of ionic surfactants with a molecular weight of less than 1000 include anionic surfactants, cationic surfactants, and amphoteric surfactants. Among these, anionic surfactants are preferred because they are more likely to alleviate the cohesive force of betaine polymers.

[0069] Examples of anionic surfactants include alkyl sulfates, alkyl ether sulfates, alkyl monoglyceryl ether sulfates, alkyl sulfonates, alkylaryl sulfonates, alkyl diphenyl ether disulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl sulfosuccinate, alkylamide sulfosuccinates, alkyl carboxylates, alkylamide ether carboxylates, alkyl succinates, aliphatic acyl sarcosinates, aliphatic acyl amino acids, aliphatic acyl taurates, aliphatic alkyl sulfoacetates, and alkyl phosphate esters. Among these, alkyl sulfates, alkyl ether sulfates, alkyl monoglyceryl ether sulfates, alkyl sulfonates, alkyl diphenyl ether disulfonates, alkyl sulfosuccinates, and alkyl ether sulfosuccinates are preferred. Alkyl sulfates and alkyl diphenyl ether disulfonates are preferred because of their high compatibility with betaine polymers. Examples of alkyl sulfates include sodium lauryl sulfate, sodium laureth sulfate, and ammonium laureth sulfate. Sodium alkyldiphenyl ether disulfonate can be cited as an example of an alkyldiphenyl ether disulfonate. The anionic group of an anionic surfactant can be, for example, a sulfonic acid group, a carboxyl group, or salts thereof. Therefore, the anionic group can be, for example, -SO3 - group, -OSO3 - Group, -COO - It could be the basis.

[0070] <1.4. Hydrolyzable Silane Compounds> The coating agent of this embodiment preferably contains a hydrolyzable silane compound and / or its hydrolysate. Because the coating agent contains a hydrolyzable silane compound and / or its hydrolysate, the elution of coating components into water is suppressed, and durability is increased. This will be explained. Betaine polymers contain monomer units that include a betaine structure, so they have high solubility in water and easily migrate to the fluid they come into contact with. Because betaine polymers have reactive groups such as silanol groups and / or alkoxysilyl groups, they are incorporated into crosslinking by chemically bonding with hydrolyzable silane compounds. Crosslinked betaine polymers are poorly soluble in water, so they are less likely to migrate to the fluids they come into contact with. Therefore, the coating agent of this embodiment can improve the durability of the coating film and improve the durability of its slip resistance.

[0071] Hydrolyzable silane compounds are silane compounds having hydrolyzable groups such as alkoxy groups, alkoxyalkoxy groups, acyloxy groups, aryloxy groups, aminooxy groups, amide groups, ketoxime groups, isocyanate groups, and halogen atoms.

[0072] In this embodiment, alkoxysilane compounds are preferably used. Examples of alkyl groups in the alkoxy group (-OR) include lower alkyl groups such as methyl, ethyl, propyl, and butyl groups. Depending on the number of hydrolyzable groups, 1 to 4 functional groups are known.

[0073] Representative examples of alkoxysilane compounds include dimethyldimethoxysilane (DMDMS), methyltrimethoxysilane (MTMS), tetramethoxysilane (TMOS), dimethyldiethoxysilane (DMDES), methyltriethoxysilane (MTES), and tetraethoxysilane (TEOS).

[0074] The polymers of hydrolyzable silane compounds are obtained by the polymerization (oligomerization) of the monomers described above through condensation. In this reaction, first, a silanol group (-Si-OH) is formed by the hydrolysis of the alkoxy group. Simultaneously, an alcohol (R-OH) is produced. Next, a siloxane bond (-Si-O-Si-O-) is formed by (dehydration) condensation of the silanol group, and this condensation is repeated to form a siloxane oligomer. As for the polymers of alkoxysilane compounds, from the standpoint of hydrolysis and condensation properties of the alkoxy group, polymers of tetramethoxysilane with a methyl group or polymers of tetraethoxysilane with an ethyl group are preferred.

[0075] In this embodiment, a polymer with a degree of polymerization n of typically 2 to 100, preferably 2 to 70, and more preferably 2 to 50 is used. Since such polymers are already commercially available, it is convenient to use them.

[0076] The hydrolyzed product of a hydrolyzable silane compound may be a partially hydrolyzed silane compound. This can be obtained by hydrolyzing a portion of the hydrolyzable groups of the hydrolyzable silane compound with a controlled amount of water.

[0077] Commercially available polymers of hydrolyzable silane compounds include MKC Silicate MS51, MKC Silicate MS56, MKC Silicate MS57, and MKC Silicate MS56S (all polymers of tetramethoxysilane) from Mitsubishi Chemical Corporation; Methyl Silicate 51 (a polymer of tetramethoxysilane), Methyl Silicate 53A, Ethyl Silicate 28, Ethyl Silicate 40, and Ethyl Silicate 48 from Colcoat Corporation; and Ethyl Silicate 40 and Silicate 45 (both polymers of tetraethoxysilane) from Tama Chemical Industry Co., Ltd. Hydrolyzable silane compounds may be used individually or in combination of two or more.

[0078] The content of the hydrolyzable silane compound without a betaine structure in the coating agent of this embodiment is preferably 3 parts by mass or more, more preferably 5 parts by mass or more, and even more preferably 10 parts by mass or more, when the total content of the solids of the betaine polymer and the active ingredients and / or surfactants of the ionic liquid is 100 parts by mass. When the content is 3 parts by mass or more, a coating film with excellent durability against fluids can be formed. On the other hand, the content of the hydrolyzable silane compound without a betaine structure in the coating agent of this embodiment is preferably 80 parts by mass or less, more preferably 70 parts by mass or less, and even more preferably 60 parts by mass or less, when the total content of the solids of the betaine polymer and the active ingredients and / or surfactants of the ionic liquid is 100 parts by mass. When the content is 80 parts by mass or less, the clouding of the coating film can be reduced.

[0079] <1.5. Sol-Gel Catalysts> The sol-gel catalyst may contain either an acid catalyst or an alkali catalyst, but an acid catalyst is preferred. Preferred acid catalysts include mineral acids such as hydrochloric acid, sulfuric acid, and nitric acid, and organic acids such as acetic acid and tartaric acid. The amount of acid used is preferably 0.001 to 0.5 moles, and more preferably 0.005 to 0.1 moles, per mole of silanol group and / or alkoxysilyl group (or alkoxysilyl group + other metal alkoxide if other metal alkoxides are also included).

[0080] As a sol-gel catalyst, an acid catalyst and an alkali catalyst can be used in combination.

[0081] <1.6. Leveling Agent> The coating agent of this embodiment preferably contains a silicone-based leveling agent. The silicone-based leveling agent can effectively lower the surface tension of the coating agent and also lower the interfacial tension between the coating agent and the object being coated (e.g., a base film), thereby suppressing the occurrence of repellency.

[0082] Examples of silicone-based leveling agents include polyether-modified silicone oil and polyglycerin-modified silicone oil. Among these, polyether-modified silicone oil is preferred.

[0083] An example of a polyether-modified silicone oil is a compound represented by the following formula. R3SiO(R2SiO) m (RR e SiO) n SiR3 Each R is independently an alkyl group having 1 to 4 carbon atoms. e These are, independently, groups containing a polyether group (hereinafter sometimes referred to as "introduced groups").

[0084] Each R is independently an alkyl group having 1 to 4 carbon atoms. Examples of alkyl groups having 1 to 4 carbon atoms include methyl, ethyl, propyl, and butyl groups. Among these, it is preferable that all R are methyl groups.

[0085] R e Each of these is an independent group containing a polyether group. Examples of polyether groups include polyethyleneoxy groups and polypropyleneoxy groups. A polyether group may also contain both ethyleneoxy (EO) and propyleneoxy (PO) groups. In this case, the ethyleneoxy (EO) and propyleneoxy (PO) groups may be arranged in a block-like manner or randomly. Each R e The polyether group may be linked to Si via a linking group. An example of a linking group is an alkylene group. The number of carbon atoms in the alkylene group may be, for example, 1 to 4. Examples of alkylene groups with 1 to 4 carbon atoms include the methylene group, ethylene group, propylene group, and butylene group.

[0086] Compounds represented by this formula can be called side-chain polyether-modified silicone oils. Side-chain polyether-modified silicone oils can include a main chain of repeating SiO units, a plurality of first side chains branching from the main chain, and a plurality of second side chains branching from the main chain. Each first side chain can independently be an alkyl group having 1 to 4 carbon atoms (see explanation of R). Each second side chain can independently be a group containing a polyether group (R e (See explanation).

[0087] The content of the silicone-based leveling agent in the coating agent of this embodiment is preferably 0.02 parts by mass or more, more preferably 0.05 parts by mass or more, even more preferably 0.10 parts by mass or more, and even more preferably 0.15 parts by mass or more, per 100 parts by mass of the solid content of the betaine polymer. On the other hand, the content of the silicone-based leveling agent in the coating agent of this embodiment is preferably 3.0 parts by mass or less, even more preferably 2.0 parts by mass or less, even more preferably 1.5 parts by mass or less, and even more preferably 1.0 part by mass or less.

[0088] The content of the silicone-based leveling agent in this embodiment is preferably 0.002% by mass or more, and more preferably 0.005% by mass or more, based on 100% by mass of the coating agent. On the other hand, the content of the silicone-based leveling agent may be, for example, 0.3% by mass or less, 0.2% by mass or less, 0.1% by mass or less, or 0.05% by mass or less.

[0089] <1.7. Solvents> The coating agent of this embodiment contains a solvent. Examples of solvents include water, alcohol-based solvents, ketone-based solvents, amide-based solvents, and ether-based solvents. Among these, alcohol-based solvents are preferred. Including an alcohol-based solvent further suppresses the occurrence of repellency. In particular, it can further suppress repellency that may occur when a coating film is formed with the coating agent on a substrate film with relatively high hydrophobicity (for example, polyolefin films such as polyethylene film or polypropylene film). Examples of alcohol-based solvents include methanol, isopropyl alcohol, n-butanol, diacetone alcohol, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, and tertiary amyl alcohol. Water is also preferred as a solvent. In particular, it is more preferable that the solvent contains both water and an alcohol-based solvent.

[0090] The alcohol-based solvent content in the coating agent of this embodiment is preferably 5% by mass or more, and more preferably 10% by mass or more, based on 100% by mass of the solvent. On the other hand, the alcohol-based solvent content may be, for example, 50% by mass or less, 30% by mass or less, or 25% by mass or less.

[0091] When the coating agent of this embodiment contains water and an alcohol-based solvent, the total content of water and the alcohol-based solvent is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 97% by mass or more, based on 100% by mass of the solvent. The total content of water and the alcohol-based solvent may be 98% by mass or more, 99% by mass or more, or 100% by mass, based on 100% by mass of the solvent.

[0092] The solvent content of this embodiment is preferably 25% by mass or more, more preferably 50% by mass or more, and even more preferably 70% by mass or more, based on 100% by mass of the coating agent. On the other hand, the solvent content may be, for example, 99% by mass or less, or 95% by mass or less.

[0093] <1.8. Others> The coating agent of this embodiment may further contain polymers other than betaine polymers. The coating agent of this embodiment may further contain antioxidants, ultraviolet absorbers, light stabilizers, fluorine compounds (e.g., fluorine-based leveling agents), surfactants, and the like.

[0094] In the coating agent of this embodiment, the total content of the betaine polymer, ionic liquid, and solvent is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 97% by mass or more. This total content may be 98% by mass or more, 99% by mass or more, or 100% by mass.

[0095] <1.9. Manufacturing Methods and Uses> The coating agent of this embodiment can be manufactured, for example, by mixing a betaine polymer with an ionic liquid and / or an ionic surfactant, a hydrolyzable silane compound and / or its hydrolysate that does not have a betaine structure, and a solvent, if necessary.

[0096] The coating agent of this embodiment can be suitably used to coat a base film. The base film may contain a resin. Examples of resins include polyolefins and polyesters. Therefore, the base film may contain polyolefins or polyesters. Examples of polyolefins include polyethylene and polypropylene. Examples of polyesters include polyethylene terephthalate (PET) and polyethylene naphthalate (PEN). PET may be copolymerized PET. PEN may be copolymerized PEN. Polyolefins are preferred because they have a low melting point and make it easy to manufacture pouches by heat sealing. The base film may be a single-layer structure or a multi-layer structure. The base film may also be surface-treated. Examples of surface treatments include corona treatment and plasma treatment.

[0097] By applying the coating agent of this embodiment to a base film and drying it as necessary, a coating film, or coat layer, can be formed on the base film. If the base film is surface-treated, it is preferable to apply the coating agent to the surface-treated surface. Examples of application methods include gravure coating, roll coating, dip coating, brush coating, spray coating, bar coating, knife coating, die coating, and spin coating. To accelerate the drying of the coating agent, the base film to which the coating agent has been applied may be heated.

[0098] <2. Film and Pouch> The film of this embodiment (hereinafter sometimes referred to as "laminated film") includes a base film and a coating layer formed on the base film. As described above, the film of this embodiment can be obtained by applying the coating agent of this embodiment to the base film and drying it as necessary. Since the coating layer of the film in this embodiment has excellent hydrophilicity, the reduction in heat sealability that may occur due to the formation of the coating layer is not significant.

[0099] The thickness of the base film may be, for example, 10 μm or more, 15 μm or more, or 20 μm or more. On the other hand, the thickness of the base film may be, for example, 1000 μm or less, 200 μm or less, 150 μm or less, or 100 μm or less.

[0100] The thickness of the coating layer is preferably 0.05 μm or more, more preferably 0.1 μm or more, and even more preferably 0.3 μm or more. On the other hand, the thickness of the coating layer is preferably 10 μm or less, more preferably 5 μm or less, and even more preferably 3 μm or less. The smaller the thickness of the coating layer, the more it is possible to avoid or reduce the decrease in heat sealability that may occur due to the coating layer. In addition, it is thought that the smaller the thickness of the coating layer, the more quickly a lubricated surface, that is, a surface with excellent sliding properties, can be formed when the coating layer comes into contact with a fluid.

[0101] The film of this embodiment may further include layers other than the base film and the coating layer. Examples of layers other than the base film and the coating layer include an adhesive layer, a nonwoven fabric layer, a printed layer, and an inorganic thin film layer. Examples of fibrous raw materials constituting the nonwoven fabric layer include cellulose fibers, polyamide fibers, vinylon fibers, polyester fibers, polyethylene fibers, polypropylene fibers, polyolefin fibers, and rayon fibers.

[0102] The film of this embodiment can be suitably used as a packaging film. Examples of packaging films include pharmaceutical packaging films, food packaging films, and electronic component packaging films (for example, films for the outer casing of lithium-ion batteries). Among these, it can be particularly suitably used as a food packaging film.

[0103] The film of this embodiment can be suitably used as a pouch film. The film of this embodiment can be particularly suitably used as a retort pouch film and a stoma pouch (i.e., a pouch for stoma appliances). In other words, the film of this embodiment can be particularly suitably used as a film for manufacturing retort pouches and a film for manufacturing stoma pouches.

[0104] The pouch of this embodiment includes the above-described film (i.e., a film comprising a base film and a coating layer formed on the base film). The pouch of this embodiment can be obtained, for example, by heat sealing the coating layers of the above-described film together. At this time, the coating layers of one film may be bonded together, or multiple films, for example, two films, may be bonded together. In the pouch of this embodiment, it is preferable that a coating layer is arranged on the inner surface of the pouch. That is, it is preferable that the innermost layer of the pouch of this embodiment is a coating layer.

[0105] The pouch in this embodiment may be, for example, a retort pouch or a stoma pouch. A stoma pouch, that is, a pouch for a stoma appliance, is a bag that receives waste discharged from a stoma. A stoma pouch may be provided with an opening for receiving waste (hereinafter sometimes referred to as the "receiving opening"). A stoma pouch may further be provided with an opening for removing waste accumulated inside the stoma pouch. A stoma appliance may include a stoma pouch and a faceplate provided on the stoma pouch. The faceplate may be provided around the receiving opening.

[0106] <3. Various modifications can be made to the embodiments described above.> Various modifications can be made to the embodiments described above. For example, one or more of the following modifications can be selected to modify the embodiments described above.

[0107] In the above-described embodiment, a configuration was explained in which a coating agent is used to coat a substrate film. However, this embodiment is not limited to this configuration. For example, a coating agent may be used to coat a glass plate, a silicon wafer, a metal plate, etc.

[0108] In the above-described embodiment, a configuration was explained in which the above-described film (i.e., a film comprising a base film and a coating layer formed on the base film) is manufactured, and then a pouch containing the coating layer is manufactured. However, this embodiment is not limited to this configuration. For example, a pouch containing a coating layer may be manufactured by coating at least a portion of the inner surface of a pouch without a coating layer with the above-described coating agent. That is, a pouch containing a coating layer may be manufactured by forming a coating layer with the above-described coating agent on at least a portion of the inner surface of a pouch without a coating layer.

[0109] In the embodiments described above, a configuration was described in which one or more of the above-mentioned films are bonded together by heat sealing in order to produce a pouch. However, this embodiment is not limited to this configuration. For example, one or more of the above-mentioned films may be cold-sealed using an adhesive or tack. [Examples]

[0110] The present invention will be described in more detail below with reference to examples and comparative examples. Hereafter, unless otherwise specified, "parts" means "parts by mass" and "%" means "percent mass".

[0111] <1. Raw materials> The following raw materials were used. Note that, in the following, polymers other than betaine acrylic polymer may be referred to as ionic functional group-containing polymers. Betaine monomer: 3-((2-(Methacryloyloxy)ethyl)dimethylammonio)propane-1-sulfonate (manufactured by TCI) Radical generation initiator: VA-086 (manufactured by Fujifilm Wako Pure Chemical Industries) Chain transfer agent (reactive group introduction agent): 3-mercaptopropyltrimethoxysilane (manufactured by TCI) Ionic liquid: Elexel MP-444PB (100% by mass of active ingredient) (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) Anionic surfactant: Sodium octyl sulfate (100% solids by mass) (manufactured by Kanto Chemical Co., Ltd.) Hydrolyzable silane compound without a betaine structure: Ethyl silicate 28 (100% by mass of active ingredient) (manufactured by Colcoat Co., Ltd.) Hydrolyzable silane compound without a betaine structure: Methyl silicate 51 (100% by mass of active ingredient) (manufactured by Colcoat Co., Ltd.) Leveling agent: KF-640 (manufactured by Shin-Etsu Chemical Co., Ltd., polyether-modified silicone oil)

[0112] <2. Hansen Solubility Parameter (HSP)> The Hansen solubility parameters (HSP) of ionic liquids were determined using the solvents shown in Table 1. Specifically, the solvents used were water (H2O), glycerol (GL), formamide (FA), thiodiethylene glycol (TDEG), diiodomethane (DIM), ethylene glycol (EG), 1,1,2,2-tetrabromoethane (TBE), 1-bromonaphthalene (BN), diethylene glycol (DEG), dimethylformamide (DMF), trichloroethylene (TCE), nitromethane (NM), trans-decahydronaphthalene (TDHN), and hexane (HX). [Table 1] Specifically, first, 0.2 g of ionic liquid was added to 2 mL of solvent under a nitrogen atmosphere, thoroughly stirred, and allowed to stand for 24 hours. Next, the degree of dissolution of the ionic liquid in the solvent was visually evaluated. This allowed for the determination of whether the solvent was a good or poor solvent. The results of this determination were entered into the sphere program of the Hansen Solubility Parameters in Practice (HSPiP) 5th Edition 5.0.13 software to determine the HSP of the ionic liquid. The London dispersion force term (i.e., dispersion term) δ of HSP obtained by this method d , the inter-dipole force term (i.e., the polarity term) δ p , hydrogen bonding force term (i.e., hydrogen bonding term) δ h This is shown in Table 2. [Table 2]

[0113] <3. Synthesis of Acrylic Polymers> 10 g of betaine monomer, 0.07 g of 3-mercaptopropyltrimethoxysilane as a chain transfer agent, and 10 g of pure water were added to a 100 mL multi-necked flask. Nitrogen gas was blown directly into the flask while stirring the solution to remove as much oxygen gas as possible. Next, 0.01 g of radical generation initiator was added, and the contents of the multi-necked flask were heated to 70°C in an oil bath. The mixture was then stirred for 4 hours while maintaining the temperature at 70°C. Subsequently, another 0.1 g of radical generation initiator was added, and the contents of the multi-necked flask were stirred for 4 hours while maintaining the temperature at 70°C. This yielded a polymer solution (solid content concentration 51%). The weight-average molecular weight of the acrylic polymer (hereinafter sometimes referred to as "betaine acrylic polymer") contained in the polymer solution was measured using gel permeation chromatography [Tosoh Corporation, HLC-8320GPC], and the weight-average molecular weight was found to be 199,600.

[0114] <4. Preparation of the coating solution> A coating solution with the composition shown in Table 3 was prepared.

[0115] <5. Preparation of test specimens> <5.1. Examples 1-5 and Comparative Example 2> The coating solution was applied to a polypropylene film (Toyobo's Pyrene P2161, 50 μm thick) using a bar coater. Specifically, the coating solution was dropped onto the corona-treated surface of the polypropylene film, and then uniformly applied to the polypropylene film using a bar coater. The polypropylene film coated with the coating solution was placed in a 60°C oven and heated for 72 hours. This resulted in a film having a polypropylene film and a coating film formed on the polypropylene film (hereinafter sometimes referred to as "laminated film"). The dry film thickness of the coating film was approximately 0.7 μm. Test specimens were cut from the laminated film, and each performance was evaluated using these specimens. <5.2. Comparative Example 1> Test specimens were cut from commercially available stoma pouches (manufactured by Alcare, Cellcare® 1-TD), and each performance aspect was evaluated using these specimens. The side of the specimen that was the inner surface of the stoma pouch will be referred to as "Side I" below.

[0116] <6. Evaluation Method> <6.1. Cloudiness of the coating solution> The coating solution was visually evaluated to determine if it was cloudy. Examples where the coating solution was not cloudy are indicated with a circle (○), and examples where the coating solution was cloudy are indicated with a cross (×).

[0117] <6.2. Whitening of the coating film> The paint film was visually evaluated to determine if it was cloudy. Examples where the paint film was not cloudy are indicated with a circle (○), and examples where the paint film was cloudy are indicated with a cross (×).

[0118] <6.3.Slip resistance> Approximately 100 μL of curry (made by Miyajima Shoyu) was drawn up from a commercially available 30g pack of curry using a micropipette and dispensed onto the coating or surface I of the test specimen. The test specimen was left standing vertically for 10 minutes, and the distance the curry slid down was measured. Here, "sliding distance" refers to the distance over which most of the curry (approximately 90 μL or more) slid down. Examples where the sliding distance was 2 cm or more are indicated with a circle (○), and examples where the sliding distance was less than 2 cm are indicated with a cross (×). Although curry is a food product, it can be used as a substitute for feces in the evaluation of its sliding properties. Since the properties of real feces vary each time, it is difficult to reliably evaluate the sliding distance. On the other hand, commercially available curry has more stable properties than real feces, so using commercially available curry allows for a more reproducible evaluation of the sliding distance.

[0119] <6.4.Durability> 2.5 g of distilled water was dispensed into a 12.5 cm x 8.5 cm styrene petri dish. A test piece cut to 11.5 cm x 8 cm was gently floated in the water, ensuring the test surface was in contact with the water. After standing in a 30°C 80% humidity bath for 1 hour, the water was collected, and the moisture was thoroughly evaporated using nitrogen gas. The remaining dry material was then quantified. The amount of coating film eluted was calculated from the ratio of the coating film weight (calculated from the cut area and film thickness) to the dry material. ○: Less than 30% of the coating film is leached out. ×: Coating film elution amount is 30% or more

[0120] <6.5. Heat sealability> Two test pieces cut from a laminated film were heat-sealed together, either on their coated surfaces or on their I-faces, using a heat sealer (Fuji Impulse Poly Sealer® P-300). After heat sealing, samples were obtained. The heat sealing was performed by setting the heat sealer's heating time adjustment knob to 8, pressing down the sealing lever, and then raising the sealing lever after the heat sealer's cooling completion sound was heard. This procedure was repeated twice. One test piece was held between the thumb and index finger of the right hand, and the other test piece was held between the thumb and index finger of the left hand. After heat sealing, the sample was pulled with the right and left hands separated by 180°. The heat sealability was then evaluated visually according to the following criteria. ○: No delamination occurs at the seal interface, and at least one of the test specimens fractures. ×: Peeling occurs at the seal interface.

[0121] <7.Results> The table containing the results is shown below. [Table 3] In this table, the mass of betaine acrylic polymer represents the mass of the solid content of the betaine acrylic polymer solution. The solvent amounts in Table 3 represent the total amount of solvents derived from the betaine acrylic polymer solution and solvents not derived from it. In Table 3, "Mass Ratio 1" refers to the ratio of the mass of solids in the betaine acrylic polymer solution to the mass of solids in the active ingredient and / or anionic surfactant of the ionic liquid. That is, Mass Ratio 1 is equal to: Mass of solids in the betaine acrylic polymer solution / Mass of solids in the active ingredient and / or surfactant of the ionic liquid. In Table 3, "Mass Ratio 2" refers to the ratio of the total mass of the solids in the betaine acrylic polymer solution and the active ingredients and / or surfactants in the ionic liquid to the mass of the active ingredients of the hydrolyzable silane compound and / or its hydrolysate that do not have a betaine structure. In other words, Mass Ratio 2 is: Mass of solids in the betaine acrylic polymer solution + Mass of solids in the active ingredients or surfactants of the ionic liquid / Mass of the active ingredients of the hydrolyzable silane compound and / or its hydrolysate that do not have a betaine structure. PP stands for polypropylene (PP) film. PE stands for polyethylene (PE) film. In Comparative Example 1, the appearance and durability of the coating film were not evaluated, and in Comparative Example 4, the slipperiness, durability, and heat sealability were not evaluated.

[0122] The laminated films produced in Examples 1-4 showed no clouding of the coating film, and furthermore, exhibited excellent slip resistance, durability, and heat sealability.

[0123] On the other hand, Comparative Example 1, which used a commercially available stoma pouch, showed poor sliding properties; in other words, the curry did not slide off. The laminated films prepared in Comparative Examples 2 and 3 had poor durability, with 50% of the coating dissolving in water. In the laminated film prepared in Comparative Example 4, the solution became cloudy after preparation, and the coating also became cloudy. [Industrial applicability]

[0124] The present invention can provide coating agents, films, and pouches, and is therefore industrially applicable.

Claims

1. A polymer comprising a monomer unit containing a betaine structure and containing at least one of a silanol group and an alkoxysilyl group, At least one of an ionic liquid and an anionic surfactant, A coating agent comprising at least one of a hydrolyzable silane compound that does not have a betaine structure and its hydrolysate, The total content of the solids of the polymer and the active ingredients and / or surfactants is 100 parts by mass, and the active ingredients of the hydrolyzable silane compound and / or hydrolysates that do not have a betaine structure are included in an amount of 3 parts by mass or more and 80 parts by mass or less. Coating agent.

2. The polymer is formed by polymerizing at least a monomer represented by formula I, 【Chemistry 1】 In the above formula I, R １ R is a (meth)acryloylaminoalkyl group having 1 to 4 carbon atoms in the alkyl group, or a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group, ２ and R ３ Each of these is independently a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, or a C1-C4 (meth)acryloyloxyalkyl group, R ４ This is an alkylene group having 1 to 4 carbon atoms, or an oxyalkylene group having 1 to 4 carbon atoms. The coating agent according to claim 1.

3. The coating agent according to claim 1, further comprising a silicone-based leveling agent.

4. The coating agent according to claim 3, wherein the silicone-based leveling agent is a polyether-modified silicone oil.

5. The coating agent according to claim 1, further comprising an alcohol-based solvent.

6. The coating agent according to claim 1, further comprising an acid.

7. The coating agent according to claim 1, further comprising water.

8. A coating agent according to claim 1, used for coating a substrate film.

9. A base film and A film comprising a base film and a coating layer formed with the coating agent described in claim 1.

10. The film according to claim 9, wherein the base film comprises at least one of polyolefin and polyester.

11. The film according to claim 9, which is used as a packaging film.

12. The film according to claim 9, which is used as a film for pouches.

13. A pouch comprising the film described in claim 9.

14. The pouch according to claim 13, which is a stoma pouch.

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