WO2019124089A1 - Coating agent for vapor deposition films, gas barrier film and packaging material - Google Patents

Abstract

Provided is a coating agent for vapor deposition films, which contains: a polyisocyanate compound (A) which has an ester skeleton derived from a polyester (A3) that is a polycondensation product of a polyvalent carboxylic acid component (A1) and a polyhydric alcohol component (A2), and which contains at least one of an ortho-directing aromatic dicarboxylic acid and an acid anhydride thereof in an amount of 10-70% by mole relative to the total amount of the polyvalent carboxylic acid component (A1); and a polyester (B) which is a polycondensation product of a polyvalent carboxylic acid component (B1) and a polyhydric alcohol component (B2), said polyvalent carboxylic acid component (B1) containing at least one of an ortho-directing aromatic dicarboxylic acid and an acid anhydride thereof, and which contains glycerol in an amount of 50-100% by mole relative to the total amount of the polyhydric alcohol component (B2). Also provided is a gas barrier film.

Description

Coating agent for vapor deposition film, gas barrier film, and packaging material

The present invention relates to a coating for a vapor deposition film, and a gas barrier film using the same.

Packaging materials such as food and beverages are often required to have gas barrier properties such as water vapor and oxygen barrier for the protection of the contents. As a method of applying a gas barrier to a packaging material, a method of applying a gas barrier coating to a stretched film or a method of providing a gas barrier resin on a layer in a multilayer film by coextrusion is widely used. The vapor deposition method to apply is an excellent method that can easily impart a barrier function regardless of the type of gas.

The base film used in the vapor deposition method includes a stretched film and an unstretched film. For example, both a stretched film and an unstretched film are used for a vapor deposited film provided with a metal deposited layer of aluminum or the like as a gas barrier layer. However, since the thickness of the vapor deposition layer is generally as thin as 10 to 50 nm, pinholes are likely to occur, and the gas barrier function may not be stable. In particular, when the base film is an unstretched film, the gas barrier function tends to be particularly unstable due to the fact that the film is easily stretched as compared with the stretched film and the gas barrier property of the film itself is poor.
In addition, in the case of a transparent vapor deposition film provided with a vapor deposition layer of a metal oxide such as silica or alumina as a gas barrier layer, an unstretched film is hardly used because the vapor deposition layer is more brittle than metal, and the dimension is more stable. In most cases, a highly oriented film is used. Even so, the problem that the barrier performance varies due to cracks and pinholes can not be solved easily.

In order to solve the problem of the vapor deposition layer which provides such a gas barrier property, to protect a vapor deposition layer by overcoat layer is performed widely especially with respect to a transparent vapor deposition film.
As overcoat techniques for transparent deposited layers, for example, in Patent Document 1 and Patent Document 2, an inorganic oxide layer, a so-called transparent deposited layer, a water-soluble polymer and (a) one or more metal alkoxides, (b A gas barrier coating layer formed by applying a gas barrier coating solution containing as a main component an aqueous solution containing at least one or more of hydrolysates of one or more metal alkoxides or (c) tin chloride, or a water / alcohol mixed solution A transparent gas barrier laminate is described. However, since the water-soluble polymer has poor coating drying properties and contains a sol-gel process in which it is difficult to control the reaction, the reaction management and reuse of the overcoat liquid are difficult, and the coating method has a complicated problem.

In addition, although metal deposition layers such as aluminum have better conformability to bending compared to transparent deposition layers, there are few examples in which an overcoat layer is provided, but in Patent Document 3, for example, pinholes etc. are present at a constant rate In order to enhance the barrier performance of the deposited metal layer, a resin composition A comprising at least two base layers and comprising polypropylene, and a mixture of a cyclic polyolefin polymer and a polyolefin comprising a copolymer of norbornene and ethylene The non-stretched aluminum vapor deposition film which provided the aluminum vapor deposition layer on this base material layer which consists of a structure which laminated | stacked a certain resin composition B is described. In this method, stability such as barrier property is imparted by vapor deposition on a film substrate containing a cyclic polyolefin-based polymer having heat resistance and dimensional stability higher than that of polypropylene alone. However, this method uses a film having a two-layer structure as a base film, and has a problem that the manufacturing method is complicated and the cost is increased.

On the other hand, the applicants of the present invention have, as a multilayer film excellent in gas barrier properties, a polyester polyol having two or more hydroxyl groups, for example, a polyvalent carboxylic acid component containing at least one ortho-oriented aromatic dicarboxylic acid or its anhydride. It has been found that a gas barrier adhesive layer comprising a polyisocyanate having two or more isocyanate groups, and a gas barrier multilayer film having an aluminum deposited layer or a layer containing an aluminum foil is excellent in gas barrier properties. (See, for example, Patent Document 4). However, since the adhesive used for the gas barrier film is a reactive two-component adhesive, it has been necessary to immediately coat the deposited film and laminate it with the second base after mixing as the adhesive. That is, for the purpose of protecting the deposited layer of the deposited film itself, for example, a second substrate is required to protect the deposited layer of the deposited film, and a laminating apparatus is required to apply the adhesive. Again, the process is complicated.

JP 2012-101505 A JP 2012-250470 A JP 2011-224921 A JP, 2013-147014, A

The problem to be solved by the present invention is that the coating on the surface of the deposited film is easy, and the obtained coating film is excellent in adhesion to the deposited film, and the deposited film after coating has excellent blocking resistance and gas barrier properties. An object of the present invention is to provide an excellent coating agent for deposited film.

The present inventors have an ester skeleton derived from polyester (A3) which is a polycondensate of polyvalent carboxylic acid component (A1) and polyvalent alcohol component (A2), and the polyvalent carboxylic acid component (A1) A) a polyisocyanate compound (A) containing 10 to 70 mol% of at least one ortho-oriented aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount, and at least one of an ortho-oriented aromatic dicarboxylic acid or an anhydride thereof A polycondensate of a polyvalent carboxylic acid component (B1) containing a species and a polyhydric alcohol component (B2), and containing 50 to 100 mol% of glycerol based on the total amount of the polyhydric alcohol component (B2) (B) It has been found that a coating agent for a deposited film, which contains

When the adhesive described in Patent Document 4 is applied as a coating agent as it is, strong adhesiveness remains, and in particular, problems occur in blocking property. The present inventors are polyhydric alcohol components containing 50 to 100 mol% of a polyvalent carboxylic acid component (B1) containing at least one of ortho-oriented aromatic dicarboxylic acids or their anhydrides as a polyester component It finds that it is excellent in blocking resistance by using polyester (B) obtained by polycondensing (B2), and also when it is a case where it laminates using a general-purpose adhesive, It has been found that a coating agent having excellent adhesion without peeling between vapor deposited films can be obtained.

That is, the present invention is a coating agent for deposited film, comprising a polyisocyanate compound (A) and a polyester (B),
The polyisocyanate compound (A) has an ester skeleton derived from polyester (A3) which is a polycondensate of polyvalent carboxylic acid component (A1) and polyvalent alcohol component (A2), and the polyvalent carboxylic acid A polyisocyanate compound (A) containing 10 to 70 mol% of at least one ortho-oriented aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount of the component (A1),
The polyester (B) is a polycondensate of a polyvalent carboxylic acid component (B1) containing at least one of an ortho-oriented aromatic dicarboxylic acid or an anhydride thereof and a polyvalent alcohol component (B2), and the polyvalent alcohol component (B2) A coating agent for deposited film is provided, which contains 50 to 100 mol% of glycerol based on the total amount.

The present invention also provides a gas barrier film obtained by coating a vapor deposition film with the coating agent described above.

The present invention also provides a packaging material using the gas barrier film described above.

The coating agent for a vapor deposition film of the present invention can be diluted with a solvent and can be easily applied to the surface of the vapor deposition film. Moreover, since a coating film is excellent in the adhesiveness to a vapor deposition film, the film which coated the coating agent for vapor deposition films of this invention on the vapor deposition film is excellent not only in gas barrier property but in lamination strength. Moreover, since the film which coated the coating agent for vapor deposition films of this invention to the vapor deposition film uses a specific polyester, it is excellent also in blocking resistance.
The gas barrier film obtained by coating the metallized film with the coating agent for a vapor deposition film of the present invention has excellent gas barrier properties without using a multi-layered laminate with an adhesive or the like, so a barrier film useful particularly for food packaging. Can be provided at low cost.

The present invention is a coating agent for a deposited film comprising a polyisocyanate compound (A) and a polyester (B). The polyester (B) has a carboxyl group or a hydroxyl group at the end, and reacts with the isocyanate group of the polyisocyanate compound (A).

(Polyisocyanate compound)
The polyisocyanate compound (A) used in the present invention has an ester skeleton derived from a polyester (A3) which is a polycondensate obtained by polycondensing a polyvalent carboxylic acid component (A1) and a polyhydric alcohol component (A2). And has an isocyanate group at the end. Since the polyester (A3) has a hydroxyl group or a carboxyl group at the end, introduction of the terminal isocyanate group is carried out by reacting the terminal hydroxy group or carboxyl group of the polyester (A3) with a polyisocyanate compound. Examples of the polyisocyanate compound include tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate and hexamethylene diisocyanate. Among them, a polyisocyanate compound containing an aromatic ring in part of the skeleton is preferable because the gas barrier function can be further improved. The number average molecular weight of the polyester (A3) is preferably 300 to 2,000.

In the present invention, the number average molecular weight or weight average molecular weight is detected by gel permeation chromatography using a GPC column LF-804 (manufactured by Showa Denko) by a differential refractive index detector (Waters 2414 manufactured by Waters). It measured from the retention time.

The polyester (A3) is used by polycondensing a polyhydric carboxylic acid component (A1) and a polyhydric alcohol component (A2).

(Polyvalent carboxylic acid component (A1))
The polyvalent carboxylic acid component (A1) contains 10 to 70 mol% of at least one ortho-orientation aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount of the polyvalent carboxylic acid component (A1) It is a feature.
An aromatic polyvalent carboxylic acid or an acid anhydride thereof in which the carboxylic acid is substituted at the ortho position (hereinafter referred to as “an aromatic polyvalent carboxylic acid or an acid anhydride thereof in which the carboxylic acid is substituted at an ortho position” Component (C1) may be referred to as “orthophthalic acid or an anhydride thereof, naphthalene 2,3-dicarboxylic acid or an anhydride thereof, naphthalene 1,2-dicarboxylic acid or an anhydride thereof, anthraquinone 2,3- Examples thereof include dicarboxylic acids or their anhydrides, and 2,3-anthracene carboxylic acids or their anhydrides. These compounds may have a substituent at any carbon atom of the aromatic ring. Examples of the substituent include chloro group, bromo group, methyl group, ethyl group, i-propyl group, hydroxyl group, methoxy group, ethoxy group, ethoxy group, phenoxy group, methylthio group, phenylthio group, cyano group, nitro group, amino group, Examples thereof include phthalimido group, carboxyl group, carbamoyl group, N-ethylcarbamoyl group, phenyl group and naphthyl group.

In the present invention, other polyvalent carboxylic acid components may be copolymerized as long as the effects of the present invention are not impaired. Specifically, as aliphatic polyvalent carboxylic acids, succinic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, etc., and as unsaturated bond-containing polyvalent carboxylic acids, maleic anhydride, maleic acid, Fumaric acid etc., 1,3-cyclopentanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid etc. as alicyclic polyhydric carboxylic acid, Terephthalic acid, isophthalic acid, pyromellitic as aromatic polyhydric carboxylic acid Acid, trimellitic acid, 1,4-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, naphthalic acid, biphenyldicarboxylic acid, diphenic acid and its anhydride, 1,2-bis ( Phenoxy) ethane-p, p'-dicarboxylic acids and anhydrides or ester-forming derivatives of these dicarboxylic acids; p- Dorokishi benzoic acid, can be used in p-(2-hydroxyethoxy) benzoic acid and alone or in mixture of two or more polybasic acids such as ester-forming derivatives of these dihydroxy carboxylic acids. Among them, succinic acid, adipic acid, 1,3-cyclopentanedicarboxylic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,8-naphthalic acid and diphenic acid are preferable from the viewpoint of organic solvent solubility and gas barrier property. (Hereinafter, “other carboxylic acid or acid anhydride” may be referred to as “acid component (C2)”).

The molar ratio of the acid component (C1) to the acid component (C2) is in the range of C1: C2 = 1: 9 to 7: 3 and more preferably in the range of 3: 7 to 7: 3. If the ratio of the acid component (C1) exceeds 70%, the rigidity of the obtained polyisocyanate compound (A) may be increased, and the adhesion to the metallized film may be reduced. On the other hand, if the ratio of the acid component (C1) is less than 10%, the gas barrier improving function of the polyisocyanate compound (A) may be impaired.

(Polyhydric alcohol component (A2))
The polyhydric alcohol component (A2) contains at least one selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol and neopentyl glycol. Among them, it is most preferable to use ethylene glycol as the main component, since it is presumed that the oxygen permeation is difficult as the molecular chain is not excessively flexible as the number of carbon atoms between oxygen atoms decreases.

Although it is preferable to use the said polyhydric-alcohol component (A2) in this invention, you may copolymerize another polyhydric-alcohol component in the range which does not impair the effect of this invention besides this. Specifically, 3-methyl-1,5-pentanediol, 1,6-hexanediol, methylpentanediol, dimethylbutanediol, butylethylpropanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, Tripropylene glycol is mentioned.

The polycondensation reaction of the polyvalent carboxylic acid component (A1) with the polyvalent alcohol component (A2) can be carried out by a known and commonly used method. The polyester polyol of the central skeleton of the polyisocyanate compound (A3) preferably has a hydroxyl value of 50 to 400 mg KOH / g and an acid value of 2 mg KOH / g or less. The hydroxyl value can be measured by the hydroxyl value measurement method described in JIS-K 0070, and the acid value can be measured by the acid value measurement method described in JIS-K 0070. If the hydroxyl value is less than 50 mg KOH / g, the molecular weight is too large, so the viscosity may be high, and good coating suitability may not be obtained. Conversely, if the hydroxyl value exceeds 400 mg KOH / g, the molecular weight is small. Since it is too large, the crosslink density of the cured coating film may be too high, and good adhesive strength may not be obtained.

(Isocyanation)
As a method of introduce | transducing an isocyanate group into the terminal of the said polyester compound (A3), it carries out by making a polyisocyanate compound react with the terminal hydroxyl group or carboxyl group which the said polyester (A3) has, as mentioned above. There is no particular limitation on this reaction, and it can be carried out by a known conventional method. However, from the viewpoint of molecular weight control and viscosity adjustment, it is preferable to introduce an isocyanate group by appropriately adding a polyol reaction component to an excessive amount of the isocyanate reaction component.
The isocyanate used in the present invention may be either a low molecular weight compound or a high molecular weight compound, but a diisocyanate is preferred from the viewpoint of reaction control. Moreover, when an aromatic ring or an aliphatic ring is contained in part of the skeleton, it is more preferable from the viewpoint of the gas barrier improving function. For example, as the isocyanate having an aromatic ring, metaxylylene diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, and as the isocyanate having an aliphatic ring, hydrogenated xylylene diisocyanate, hydrogenated toluene diisocyanate, isophorone diisocyanate, norbornene diisocyanate Can be mentioned. On the other hand, examples of other isocyanates include tetramethylene diisocyanate, hexamethylene diisocyanate, allophanate bodies of hexamethylene diisocyanate, biuret bodies and nurate bodies.

(Blocked isocyanate)
Moreover, as long as it is a polyisocyanate compound containing an aromatic ring and an aliphatic ring, it may be blocked isocyanate. As an isocyanate blocking agent, for example, as long as it contains an aromatic group, phenol, thiophenol, methylthiophenol, ethylthiophenol, cresol, xylenol, resorcinol, nitrophenol, phenols such as chlorophenol, etc. Also, aromatic amines, imides, active methylene compounds such as acetylacetone, acetoacetate ester, malonic acid ethyl ester, mercaptans, imines, ureas, diaryl compounds, sodium bisulfite, etc. may be mentioned. The blocked isocyanate is obtained by the addition reaction of the above-mentioned isocyanate compound and an isocyanate blocking agent by a conventionally known appropriate method.

(Polyester (B))
The polyester (B) used in the present invention is produced by polycondensation of a polyvalent carboxylic acid component (B1) containing at least one of an ortho-oriented aromatic dicarboxylic acid or its anhydride with a polyhydric alcohol component (B2). Be done.
The molecular weight of the polyester (B) is not particularly limited as long as it can impart sufficient film toughness, coating suitability, and solvent solubility as a coating agent, but a number average molecular weight of 1,000 to 50,000 is preferable. More preferably, it is 1000 to 30000. The functional group at the polyester end may have both an alcohol end and a carboxylic acid end, but in order to use an isocyanate-based curing agent in combination, it is preferable that the polyester polyol is mainly composed of an alcohol end.

(Glass transition temperature (Tg) of polyester (B))
The glass transition temperature (hereinafter sometimes referred to as Tg) of the polyester (B) used in the present invention is not particularly limited, but is preferably 15 ° C. or more. When the Tg is less than 15 ° C., the coating agent itself develops tackiness after the coating operation and tends to cause blocking, which may cause problems in the winding operation after coating. It is preferable that Tg is 18 degreeC or more especially, More preferably, it is 25 degreeC or more.
In the present invention, Tg was measured by detecting the heat flow rate in a temperature range of −50 ° C. to 100 ° C. using a differential scanning calorimeter (DSC 822e manufactured by METTLER TOLEDO).

The polyester (B) used in the present invention is used by polycondensing a polyvalent carboxylic acid component (B1) and a polyhydric alcohol component (B2).

(Polyvalent carboxylic acid component (B1))
The polyvalent carboxylic acid component (B1) is characterized in that it contains at least one of an ortho-oriented aromatic dicarboxylic acid or an anhydride thereof. In addition, when the content with respect to all the carboxylic acid components is 70 to 100 mol%, the effect of improving the barrier properties is high, and in addition, it is particularly preferable because the solvent solubility excellent as a coating agent is excellent.
In the present invention, it is preferable to use an ortho-oriented aromatic dicarboxylic acid or an anhydride thereof, but in addition, the above-mentioned acid component (C2) can be used as long as the effects of the present invention are not impaired. Among them, succinic acid, 1,3-cyclopentanedicarboxylic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,8-naphthalic acid and diphenic acid are preferable from the viewpoint of organic solvent solubility and gas barrier property.

(Polyhydric alcohol component (B2))
The polyhydric alcohol component (B2) in the polyester (B) used in the present invention is characterized by containing glycerol and having a glycerol content of 50 to 100 mol% with respect to all the polyhydric alcohol components. When the glycerol content is 50 mol% or more, the molecular movement of the polyester resin is suppressed by the increase in the crosslinking point on the molecular structure, and the blocking function and the barrier function of the resin are improved.
The polyhydric alcohol component (B2) used in combination with glycerol is not particularly limited as long as it is possible to synthesize a polyester exhibiting the performance of gas barrier compensation, but ethylene glycol, propylene glycol, butylene glycol, neopentyl glycol, cyclohexane dimethanol, and 1 It is preferable to contain a polyhydric alcohol component containing at least one selected from the group consisting of 3, 3-bishydroxyethylbenzene. Among them, it is most preferable to use ethylene glycol as the main component, since it is presumed that the oxygen permeation is difficult as the molecular chain is not excessively flexible as the number of carbon atoms between oxygen atoms decreases.

In the present invention, although it is preferable to use the above-mentioned polyhydric alcohol component (B2), in addition to this, other polyhydric alcohol components may be copolymerized within the range not impairing the effects of the present invention. Specifically, as diols, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, methylpentanediol, dimethylbutanediol, butylethylpropanediol, diethylene glycol, triethylene Glycol, tetraethylene glycol, dipropylene glycol and tripropylene glycol are tri- or higher alcohols, and trimethylolpropane, trimethylolethane, tris (2-hydroxyethyl) isocyanurate, 1,2,4-butanetriol, Pentaerythritol, dipentaerythritol and the like can be mentioned. In particular, among trihydric alcohols, polyesters which use tris (2-hydroxyethyl) isocyanurate in combination have good organic solvent solubility due to their branched structure and moderately high crosslink density, as well as barrier function. It is excellent and particularly preferably used.

The catalyst used for the reaction to obtain the polyester of the present invention includes tin-based catalysts such as monobutyl tin oxide, dibutyl tin oxide and the like, titanium-based catalysts such as tetra-isopropyl-titanate and tetra-butyl-titanate, tetra-butyl-zirconate and the like. An acid catalyst such as a zirconia-based catalyst can be mentioned. It is preferable to use the titanium-based catalyst such as tetra-isopropyl-titanate or tetra-butyl-titanate having high activity to the ester reaction in combination with the above-mentioned zirconia catalyst. The amount of the catalyst is 1 to 1000 ppm, preferably 10 to 100 ppm, based on the total mass of the reaction raw material used. If it is less than 1 ppm, it is difficult to obtain the effect as a catalyst, and if it exceeds 1000 ppm, there may occur a problem of inhibiting the urethanation reaction when using an isocyanate curing agent.

(Coating agent)
The coating agent for deposited film of the present invention (hereinafter sometimes referred to simply as "coating agent") contains the polyisocyanate compound (A) and the polyester (B), but the reaction of the polyisocyanate compound (A) It is preferable to blend so that the component and the hydroxyl group of polyester (B) are 0.5 / 1 to 5/1 (equivalent ratio), and from the viewpoint of the barrier function and blocking resistance, more preferably 1/1 to 5 It is 1.5 / 1. If the amount of the polyisocyanate component exceeds this range, excess blocking of the polyisocyanate component tends to result in poor blocking resistance. On the other hand, if the amount of polyester (B) is too large, the cured coating becomes hard and adhesion is good. There is a possibility that strength can not be obtained.

(Solvent used for coating agent)
The coating agent of the present invention may appropriately use a solvent. The solvent to be used is preferably a non-aqueous system from the viewpoint of compensating for the rapid drying property and the water vapor barrier function, and it is preferable that the organic solvent is the main component. Specifically, it is preferable that the solubility is high in the polyester which is the main component, and the residual solvent and the immediate drying property. From this viewpoint, an organic solvent having a boiling point of 100 ° C. or less is preferable. Preferred organic solvents include ethyl acetate, propyl acetate and butyl acetate as ester solvents, acetone and 2-butanone as ketone solvents, tetrahydrofuran as ether solvents, and hexane as aliphatic solvents. Examples of cyclohexane and aromatic solvents include toluene and the like. In the case of mixing an alcohol solvent and water, it is preferable to minimize the use of an isocyanate compound as a curing agent.

(Additives to coating agent)
(Plate-like inorganic compound)
The coating agent of the present invention may contain a plate-like inorganic compound.
When a plate-like inorganic compound is used in the present invention, it has an effect of improving the winding suitability after coating and gas barrier properties by reducing the adhesiveness.

When the plate-like inorganic compound is used in combination, the barrier property is improved by the plate-like shape. The charge between the layers of the plate-like inorganic compound does not directly affect the barrier property greatly, but the dispersibility with respect to the coating agent of the present invention is significantly inferior to the ionic inorganic compound or the swellable inorganic compound, and the addition amount When it is increased, the coating suitability of the coating agent of the present invention becomes an issue due to the thickening and the thixotropy. On the other hand, in the case of non-charging (non-ionic) or non-swelling property with respect to water, even if the addition amount is increased, it becomes difficult to become thickened or thixotropic, and coating suitability can be secured. Examples of the plate-like inorganic compound used in the present invention include, for example, water-containing silicates (phylosilicate minerals etc.), kaolinite-serpentine group clay minerals (halloysite, kaolinite, ende), for example. Light, dickite, nacrite, etc., antigorite, chrysotile, etc.), pyrophyllite-talc group (pyrophyllite, talc, kerolaite etc.), smectite clay mineral (montmorillonite, beidellite, nontronite, saponite, hectorite, Sauconite, stevensite etc.), vermiculite clay mineral (vermiculite etc), mica or mica group clay minerals (mica such as muscovite, phlogopite etc., margarite, tetrasilylic mica, teniolite etc), chlorite family (cookeite, sudoite) , Krinokuroa, Sha Site Nimaito etc.), hydrotalcite, tabular barium sulfate, boehmite, and aluminum polyphosphate and the like. These minerals may be natural clay minerals or synthetic clay minerals. The plate-like inorganic compounds are used singly or in combination of two or more. The aspect ratio of the plate-like inorganic compound, the content in the coating agent, the particle diameter, and the particle size distribution are not particularly limited as long as the barrier improving function and the blocking resistance can be imparted.

As a method of dispersing the plate-like inorganic compound used in the present invention in the coating agent of the present invention, a known dispersion method can be used. For example, ultrasonic homogenizers, high pressure homogenizers, paint conditioners, ball mills, roll mills, sand mills, sand grinders, dyno mills, disper mats, nano mills, SC mills, nanomizers, etc. can be mentioned, and still more preferably high shear force is generated Examples of equipment that can be used include a Henschel mixer, a pressure kneader, a Banbury mixer, a planetary mixer, a double roll, a triple roll, and the like. One of these may be used alone, or two or more types of devices may be used in combination.

(Acid anhydride)
In the present invention, for the purpose of improving the acid resistance of the coating agent layer, known acid anhydrides may be used in combination as additives. As the acid anhydride, for example, phthalic anhydride, succinic anhydride, hetic anhydride, hymic anhydride, maleic anhydride, tetrahydrophthalic anhydride, hexahydraphthalic anhydride, tetrabromophthalic acid Anhydride, tetrachlorophthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenotetracarboxylic acid anhydride, 2,3,6,7-naphthalenetetracarboxylic acid dianhydride, 5- (2 And 5, 5-oxotetrahydrofuryl) -3-methyl-3-cyclohexene-1,2-dicarboxylic acid anhydride, styrene-maleic anhydride copolymer and the like. It is preferable that non-petroleum-derived components are contained as raw materials of these acid anhydrides, because the ratio of non-petroleum-derived components can be increased. An example of such a compound is succinic anhydride.

(Gas capture component)
Moreover, you may add the material which has a gas trapping function further as needed. Examples of the material having an oxygen scavenging function include hindered phenols, vitamin C, vitamin E, organic phosphorus compounds, low molecular weight organic compounds that react with oxygen such as gallic acid, pyrogallol, cobalt, manganese, nickel, iron, Transition metal compounds, such as copper, etc. are mentioned. Examples of the material having a water vapor capture function include materials such as silica gel, zeolite, activated carbon, calcium carbonate and the like. In addition to these, it is possible to add the capture component of the target gas to be blocked.

(Other ingredients)
In addition, various additives may be blended as long as the gas barrier auxiliary function is not impaired. Examples of the additive include inorganic fillers such as silica, alumina, aluminum flakes and glass flakes, and dispersants and stabilizers (antioxidants, heat stabilizers, UV absorbers, etc.) when using inorganic materials, and plastic Agents, antistatic agents, lubricants, antiblocking agents, colorants, leveling agents, slip improvers and the like.

(Deposition film)
The coating agent of the present invention is used to significantly improve the gas barrier properties of a vapor-deposited film. Therefore, various vapor deposition films are used as an object to which a coating agent is applied. A film coated with the present material can be used as a high gas barrier film because it is more excellent in gas barrier properties than a general vapor deposition film.

(Type of vapor deposition layer)
As a kind of vapor deposition layer of the vapor deposition film by which the coating agent used by this invention is apply | coated, if gas-barrier property can be provided, it will not be specifically limited. Metal deposition or metal oxide deposition widely used at present for packaging is suitably exemplified. Although various metals can be illustrated as metal vapor deposition, especially cheap and widely used aluminum is preferable. In addition, as the metal oxide, aluminum oxide (AlOx) and silicon oxide (SiOx) are preferably exemplified as highly versatile materials. Other than this, a film in which various organic compounds and inorganic compounds are vapor-deposited, or a film in which plural kinds of materials are vapor-deposited may be used. The vapor deposition method is not particularly limited, and examples thereof include a vacuum vapor deposition method which is a physical vapor deposition method and a CVD method which is a chemical vapor deposition method. The thickness of the vapor deposition layer is not particularly limited as long as the vapor deposition layer can exhibit a certain gas barrier function even if it is a single vapor deposition layer, and if it can be made a high barrier film by providing a coating layer thereon. However, if the vapor deposition layer is too thin, the contribution of the vapor deposition layer to the gas barrier decreases, and even if the coating agent of the present invention is used, a sufficient gas barrier function can not be expressed. It is preferably 3 to 70 nm, more preferably 5 to 60 nm. Moreover, these vapor deposition films can be used as protection of vapor deposition, with or without overcoating or undercoating previously applied. However, in particular, a vapor-deposited film having no coating layer is preferably used because the barrier enhancing function of the coating agent of the present invention can be sufficiently exhibited.

(Type of film)
The film using the coating agent in the present invention is not particularly limited, and a thermoplastic resin film can be appropriately selected according to the desired application. For example, for food packaging, polyethylene terephthalate (PET) film, polystyrene film, polyamide film, polyacrylonitrile film, polyethylene film (LLDPE: linear low density polyethylene film, HDPE: high density polyethylene film) or polypropylene film (CPP: unstretched) Polyolefin films such as polypropylene film, OPP: biaxially oriented polypropylene film), polyvinyl alcohol film, ethylene-vinyl alcohol copolymer film, cycloolefin copolymer film and the like. These films can be preferably used with or without a stretching treatment. Films subjected to a stretching process have the advantages of dimensional stability, rigidity and easy coating operation and ease of use. In addition, the unstretched film conversely has poor dimensional stability, rigidity, and heat resistance of the substrate, and the vapor deposition layer has many defects, and in many cases the gas barrier is not stable. Therefore, using the coating agent of the present invention There is an advantage of strengthening the

(Part to do coating)
In the present invention, it is necessary to apply a coating agent to the vapor deposition side. This is because the coating agent of the present invention efficiently fills in the defects such as pinholes and cracks of the vapor deposition to impart an extremely excellent barrier improvement function. When the coating agent is disposed on the film surface opposite to the vapor deposition surface, such a reinforcing effect can not be provided, and the barrier improving effect is limited.

In the present invention, in order to impart a higher barrier function, a barrier film containing a gas barrier layer such as polyvinyl alcohol, ethylene / vinyl alcohol copolymer, vinylidene chloride or the like is used in combination to impart a higher barrier function. Also good.

(Coating method)
The coating method of the coating agent of the present invention is not particularly limited as long as the deposition surface of the deposited film can be coated. As a specific method, various coating methods such as call coat and gravure coat can be exemplified. Moreover, there is no limitation in particular also about the apparatus used for coating.

(Coating thickness)
The film thickness to which the coating agent of the present invention is applied is not particularly limited. However, the coating agent of the present invention enhances the reinforcing effect of the gas barrier by closing the deposition defects. Therefore, the coating film thickness does not need to be thick as long as the deposition defects can be closed, and if it is 0.1 μm or more, the barrier improvement effect can be obtained. The preferable thickness range is a range of 0.2 μm to 5 μm, more preferably 0.3 to 3 μm, in view of the balance between the fact that coating defects are less likely to occur and the drying property.

(Layer configuration in which a coating agent is used)
The following constitution is assumed as a layer constitution in which the coating agent of the present invention is used. In any case, a good barrier function can be provided by coating directly on the vapor deposition layer.
1) As composition using metal vapor deposition stretched film such as aluminum,
In the case of using a transparent vapor-deposited stretched film such as a coating agent / ink / vapor-deposited stretched film / laminated adhesive / sealant film 2) aluminum oxide of the present invention,
Transparent vapor-deposited stretched film / coating agent of the present invention / ink / laminated adhesive / sealant film 3) Metallized non-stretched film such as aluminum, etc. Composition of stretched film / ink / laminated adhesive / coating of the present invention Agent / metal deposition unstretched film / coating / ink / metal deposition unstretched film 4) transparent vapor deposited unstretched film such as aluminum oxide etc. stretched film / ink / laminate adhesive / coating agent of the present invention / transparent deposition Unstretched film · Coating agent of the present invention / ink / transparent vapor deposited unstretched film In any layer configuration, it is possible to provide a high gas barrier film having two or less film layers and printed with an ink layer. In particular, when a metal or a transparent vapor deposited unstretched film is used, a single layer high barrier film can be provided.

(Type of gas component that can shut off permeation)
Gases that can be blocked by the film for gas barrier using the coating agent of the present invention include oxygen, water vapor, carbon dioxide, inert gases such as nitrogen and argon, alcohol components such as methanol, ethanol and propanol, phenol, cresol, etc. In addition to phenols of the above, aroma components consisting of low molecular weight compounds such as soy sauce, sauce, miso, lemonon, menthol, methyl salicylate, coffee, cocoa shampoo, rinse, etc. can be exemplified.

The coating material of the present invention improves the barrier property of water vapor and oxygen of a vapor deposited film, and also has high laminating strength, and therefore, in addition to various packaging materials requiring laminating work, an adhesive for protective films for solar cells, for example. And coating agents for electronic materials such as coatings for water vapor barrier substrates for display devices, coatings for building materials, coatings for industrial materials, etc., suitably used for reinforcement of the gas barrier properties of water vapor and oxygen it can.

Next, the present invention will be specifically described by way of examples and comparative examples. Examples Unless otherwise stated, "parts" and "%" are on a mass basis. The polyester polyol containing glycerol has a theoretical number average molecular weight calculated from the hydroxyl value and a number average molecular weight by the above measuring method greatly different from each other, so the actual number average molecular weight is described.

In the present invention, the number average molecular weight or weight average molecular weight is detected by gel permeation chromatography using a GPC column LF-804 (manufactured by Showa Denko) by a differential refractive index detector (Waters 2414 manufactured by Waters). It measured from the retention time.

Production Example 1 Method for Producing Polyester Polyol “Gly7 EG5oPA11” Consisting of Glycerol, Ethylene Glycol and Phthalic Anhydride In a polyester reaction vessel equipped with a stirrer, nitrogen gas inlet pipe, rectification pipe, water separator, etc., phthalic anhydride 626 Charge 7 parts of ethylene glycol, 125.3 parts of ethylene glycol, 248 parts of glycerol and 0.05 parts of titanium tetraisopropoxide, gradually heat so that the upper temperature of the rectification tube does not exceed 100 ° C, and set the internal temperature to 220 ° C. Held on When the acid value became 10 mgKOH / g or less, heating was continued at 100 torr under reduced pressure, and the esterification reaction was completed when the acid value was 2 mgKOH / g or less, to obtain a polyester polyol "Gly7EG5oPA11" having a number average molecular weight of 2300.

Production Example 2 Method for Producing Polyester Polyol "Gly 9 o PA 10" Composed of Glycerol and Phthalic Anhydride 567.6 parts of Phthalic Anhydride in a polyester reaction container equipped with a stirrer, nitrogen gas inlet pipe, rectification pipe, water separator, etc. Then, 330.9 parts of glycerol and 0.05 parts of titanium tetraisopropoxide were charged, and the internal temperature was maintained at 190 ° C. by gradually heating so that the upper temperature of the rectification pipe did not exceed 100 ° C. Thereafter, 101.5 parts of phthalic anhydride is further added when the acid value is 40 mg KOH / g, and when the acid value is 70 mg KOH / g, the esterification reaction is completed, and polyester polyol "Gly 9 o PA 10 having a number average molecular weight of 1,200 is obtained. I got

Production Example 3 Method for Producing Polyester Polyol “EGoPA 900” Consisting of Phthalic Anhydride and Ethylene Glycol 697 parts of phthalic anhydride in a polyester reaction vessel equipped with a stirrer, nitrogen gas introduction pipe, rectification pipe, water separator, etc. Then, 303 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide were charged, and the internal temperature was maintained at 220 ° C. by gradually heating so that the upper temperature of the rectification pipe did not exceed 100 ° C. Heating is continued at 100 torr under reduced pressure when the acid value is 10 mg KOH / g or less, and the esterification reaction is terminated when the acid value is 2 mg KOH / g or less, and the theoretical number average molecular weight 900 calculated from the hydroxyl value. Polyester polyol "EGoPA 900" was obtained.

Production Example 4 Method for Producing Polyester Polyol “Gly1EG3oPA3.4” Consisting of Glycerol, Ethylene Glycol and Phthalic Anhydride In a polyester reaction vessel equipped with a stirrer, nitrogen gas inlet tube, rectification tube, water separator, etc. Charge 644.1 parts of acid, 238.2 parts of ethylene glycol, 117.8 parts of glycerol and 0.05 parts of titanium tetraisopropoxide, and gradually heat so that the upper temperature of the rectification tube does not exceed 100 ° C. The temperature was kept at 220 ° C. When the acid value is 10 mgKOH / g or less, heating is continued at 100 torr under reduced pressure, and the esterification reaction is completed when the acid value is 2 mgKOH / g or less, to obtain a polyester polyol "Gly1EG3oPA3.4" having a number average molecular weight of 1100. The

(Production Example 5) Production method of isocyanate compound "EGoPA5AA5-850-XDI" having polyester polyol EGoPA5AA5-850 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, 319.9 parts of phthalic anhydride, 315.6 parts of adipic acid, 364.6 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged into a polyester reaction vessel equipped with a water separator etc., and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA5AA5-850" having a theoretical number average molecular weight of 820 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above-mentioned "EGoPA 5AA5-850" and 917.7 parts of XDI are charged, and 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 17% or less, the urethanation reaction was completed to obtain a polyisocyanate compound "EGoPA5AA5-850-XDI" having an NCO% of 15.8%.

(Production Example 6) Production method of isocyanate compound "EGoPA5AA5-500-XDI" having polyester polyol EGoPA5AA5-500 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, In a polyester reaction vessel equipped with a water separator etc., 303.0 parts of phthalic anhydride, 298.9 parts of adipic acid, 398.1 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA5AA5-500" having a theoretical number average molecular weight of 510 calculated from the hydroxyl value.
Into a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the "EGoPA 5AA 5-500" and 1475.9 parts of XDI are charged, and 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 22% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA5AA5-500-XDI" having an NCO% of 19.2%.

(Production Example 7) Production method of isocyanate compound "EGoPA5AA5-2000-XDI" having polyester polyol EGoPA5AA5-2000 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, 333.7 parts of phthalic anhydride, 329.2 parts of adipic acid, 337.2 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged into a polyester reaction vessel equipped with a water separator etc., and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA5AA5-2000" having a theoretical number average molecular weight of 1930 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above "EGoPA 5AA5-500" and 390.4 parts of XDI are charged, and it is 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 10% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA5AA5-2000-XDI" having an NCO% of 8.5%.

(Production Example 8) Production method of isocyanate compound "EGoPA7AA3-850-XDI" having polyester polyol EGoPA7AA3-850 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, In a polyester reaction vessel equipped with a water separator etc., 447.0 parts of phthalic anhydride, 189.0 parts of adipic acid, 363.9 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA7AA3-850" having a theoretical number average molecular weight of 800 calculated from the hydroxyl value.
Into a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above "EGoPA7AA3-850" and 944.6 parts of XDI are charged, and 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 16% or less, the urethanation reaction was completed to obtain a polyisocyanate compound "EGoPA7AA3-850-XDI" having an NCO% of 14.4%.

(Production Example 9) Production method of isocyanate compound "EGoPA1AA9-850-XDI" having as a central skeleton a polyester polyol EGoPA1AA9-850 consisting of phthalic anhydride, adipic acid and ethylene glycol Agitator, nitrogen gas inlet tube, rectification tube, In a polyester reaction vessel equipped with a water separator etc., 64.2 parts of phthalic anhydride, 570.0 parts of adipic acid, 365.8 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA1AA9-850" having a theoretical number average molecular weight of 840 calculated from the hydroxyl value.
Into a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above "EGoPA1AA9-850" and 899.6 parts of XDI are charged, and it is 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% was 14% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA1AA9-850-XDI" having an NCO% of 12.8%.

(Production Example 10) Production method of isocyanate compound "PGoPA5AA5-850-XDI" having polyester polyol PGoPA5AA5-850 consisting of phthalic anhydride, adipic acid and propylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, Into a polyester reaction vessel equipped with a water separator etc., 293.3 parts of phthalic anhydride, 289.4 parts of adipic acid, 417.3 parts of propylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification tube The internal temperature was maintained at 180 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "PGoPA5AA5-850" having a theoretical number average molecular weight of 700 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above "PGoPA5AA5-850" and 1069.4 parts of XDI are charged, and it is 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 18% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "PGoPA5AA5-850-XDI" having an NCO% of 15.5%.

(Production Example 11) Production method of an isocyanate compound "NPGoPA5AA5-850-XDI" having a polyester polyol NPGoPA5AA5-850 consisting of phthalic anhydride, adipic acid and neopentyl glycol as a central skeleton Agitator, nitrogen gas inlet tube, rectification tube Into a polyester reaction vessel equipped with a water separator etc., 249.6 parts of phthalic anhydride, 246.2 parts of adipic acid, 504.2 parts of neopentyl glycol and 0.05 parts of titanium tetraisopropoxide are charged and rectified The internal temperature was maintained at 200 ° C. by gradually heating so that the temperature at the top of the tube did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "NPGoPA5AA5-850" having a theoretical number average molecular weight of 720 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet and a reflux condenser, 1000 parts of the above-mentioned "NPGoPA5AA5-850" and 1050.6 parts of XDI are charged, and it is carried out at 60 ° C for 3 hours under nitrogen stream. It was made to react. When the NCO% reached 18% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound “NPGoPA5AA5-850-XDI” having an NCO% of 15.7%.

(Production Example 12) Production method of isocyanate compound "EGoPA5SuA5-850-XDI" having polyester polyol EGoPA5SuA5-850 consisting of phthalic anhydride, succinic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, In a polyester reaction vessel equipped with a water separator etc., 342.5 parts of phthalic anhydride, 273.0 parts of succinic acid, 384.5 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mg KOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA5SuA5-850" having a theoretical number average molecular weight of 830 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet and a reflux condenser, 1000 parts of the above-mentioned "EGoPA5SuA5-850" and 906.3 parts of XDI are charged, and it is 3 hours at 60 ° C under nitrogen stream. It was made to react. When the NCO% reached 16% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA5SuA5-850-XDI" having an NCO% of 14.3%.

(Production Example 13) Production method of isocyanate compound "EGoPA5MA5-850-XDI" having polyester polyol EGoPA5MA5-850 consisting of phthalic anhydride, maleic acid and ethylene glycol as a central skeleton Stirrer, nitrogen gas inlet tube, rectification tube, In a polyester reaction vessel equipped with a water separator etc., 344.2 parts of phthalic anhydride, 269.7 parts of maleic acid, 386.1 parts of ethylene glycol and 0.05 parts of titanium tetraisopropoxide are charged, and the upper part of the rectification pipe The internal temperature was maintained at 220 ° C. by gradually heating so that the temperature did not exceed 100 ° C. When the acid value became 2 mgKOH / g or less, the esterification reaction was completed to obtain a polyester polyol "EGoPA5MA5-850" having a theoretical number average molecular weight of 810 calculated from the hydroxyl value.
In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet, and a reflux condenser, 1000 parts of the above-mentioned "EGoPA5MA5-850" and 930.5 parts of XDI are charged, and 3 hours at 60 ° C under a nitrogen stream. It was made to react. When the NCO% reached 18% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA5MA 5-850-XDI" having an NCO% of 15.7%.

(Production Example 14) Production method of isocyanate compound "EGoPA5AA5-850-TDI" having polyester polyol EGoPA5AA5-850 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Thermometer, stirrer, inert gas inlet, In a four-necked flask equipped with an air inlet and a reflux condenser, 1000 parts of the above Preparation Example 5 "EGoPA5AA5-850" and 849.6 parts of TDI were charged and reacted at 60 ° C for 3 hours under a nitrogen stream. When the NCO% reached 16% or less, the urethanation reaction was terminated to obtain a polyisocyanate compound "EGoPA5AA5-850-TDI" having an NCO% of 14.5%.

(Production Example 15) Production method of isocyanate compound "EGoPA5AA5-850-MDI" having a polyester polyol EGoPA5AA5-850 consisting of phthalic anhydride, adipic acid and ethylene glycol as a central skeleton Thermometer, stirrer, inert gas inlet, In a four-necked flask equipped with an air inlet and a reflux condenser, 1000 parts of the above Preparation Example 5 "EGoPA5AA5-850" and 2220.6 parts of MDI were charged, and reacted at 60 ° C for 3 hours under a nitrogen stream. When the NCO% reached 20% or less, the urethanation reaction was completed to obtain a polyisocyanate compound "EGoPA5AA5-850-MDI" having an NCO% of 18.8%.

(Production Example 16) Method for producing isocyanate compound "EGoPA 900-XDI" having as a central skeleton a polyester polyol "EGoPA 900" consisting of phthalic anhydride and ethylene glycol Thermometer, stirrer, inert gas inlet, air inlet and reflux In a four-necked flask equipped with a condenser, 1000 parts of the above Preparation Example 3 "EGoPA 900" and 1207.6 parts of XDI were charged, and reacted at 60 ° C for 3 hours under a nitrogen stream. When the NCO% reached 18% or less, the urethanation reaction was completed to obtain a polyisocyanate compound "EGoPA 900-XDI" having an NCO% of 14.9%.

Raw material monomer composition of polyester polyol (B) for Examples and Comparative Examples obtained in Production Examples 1 to 4, number average molecular weight of resin, glycerol content (mol%) with respect to all polyhydric alcohol components, polyvalent carboxylic acid The content (mol%) of the ortho-oriented aromatic dicarboxylic acid or its anhydride with respect to all the components and the glass transition temperature (° C.) measured by the above-mentioned method are shown in Table 1.

Raw material monomer composition of the polyisocyanate compound (A) for Examples and Comparative Examples obtained in Production Examples 5 to 16, NCO% (weight fraction of isocyanate group in molecule), ortho orientation with respect to all components of polyvalent carboxylic acid The content (mol%) of the aromatic dicarboxylic acid or its anhydride is shown in Table 2, and the raw material monomer composition of the polyisocyanate compound for the examples and comparative examples obtained in Production Examples 11 to 16, NCO% (in the molecule) The content (mol%) of the ortho-oriented aromatic dicarboxylic acid or the anhydride thereof with respect to the weight fraction of the isocyanate group) and the total component of the polyvalent carboxylic acid is shown in Tables 2 and 3.

The abbreviations in the table have the following meanings.
XDI: metaxylylene diisocyanate TDI: tolylene diisocyanate MDI: diphenylmethane diisocyanate The isocyanate used is as follows.
・ XDI: Mitsui Chemicals Co., Ltd. “Takenate 500” (nonvolatile component 100%)
・ TDI: Toron Co., Ltd. product "Corronate T-100" (non volatile matter 100%)
-MDI: "Millionate MT" manufactured by Tosoh Corp. (nonvolatile component 100%)
NCO%: It is an isocyanate group content with respect to a polyisocyanate compound (A), and is a measured value.

(Example and Comparative Example)
The compounding ratio of the coating agent of the example and the comparative example and the film to be used are shown in Table 4.

(Preparation of coating agent)
The polyester (B) synthesized in the preparation example was added to 2-butanone and stirred with a stirrer at normal temperature. It was possible to prepare a solution in which all the polyesters were completely dissolved in the solvent. To the resulting solution was added the polyisocyanate compound (A) synthesized in the production example or a commercially available isocyanate compound, and the mixture was stirred with a stirrer at room temperature to prepare a uniform coating agent.

Here, commercially available isocyanate compounds are as follows.
・ D-110N: Mitsui Chemicals Co., Ltd. “Takenate D-110N” (Meta-xylylene diisocyanate adduct, 75.0% of nonvolatile components, solvent ethyl acetate)
· KW-75: "DIC Dry KW-75" (manufactured by DIC Corporation) (Tolylene diisocyanate adduct, 75.0% nonvolatile component, solvent ethyl acetate)
· T-1890: "VESTANATT-1890 / 100" (isophorone diisocyanate isocyanurate, 100% nonvolatile component) manufactured by EVONIC, diluted with ethyl acetate to prepare 70% nonvolatile component · Takenate 500: Mitsui Chemicals Co., Ltd. Made "Takenate 500" (Meta-xylylene diisocyanate, 100% non-volatile components)

(Production method of gas barrier film Coating method of coating agent)
The resulting coating agent is coated on the deposition side of the deposited film to a coating amount of 0.5 g / m ² (solid content) using a bar coater # 2, and the solvent is applied by hot air at 80 ° C. with a dryer. After volatilization, the film was placed in a dryer set at 150 ° C. for 30 seconds to obtain a gas barrier film having a uniform coating layer.
The following was used as a vapor deposition film which is a base material.
-Aluminum deposited PET film: 1510 # 12 (manufactured by Toray Film Co., Ltd.)
Unstretched film · LLDPE film: TUX-HC # 40 (made by Mitsui Chemicals Tosoh Co., Ltd.)
Unstretched deposited film · Aluminum deposited CPP film: 2203 # 25 (made by Toray Film Co., Ltd.)
Aluminum-deposited LLDPE film: TUX-F # 30 (manufactured by Mitsui Chemicals Toshiro Co., Ltd.)

(Evaluation method of gas barrier film)
The gas barrier film was evaluated by measuring oxygen permeability, measuring water vapor permeability, measuring laminate strength, and blocking resistance (coating drying characteristics).
The gas barrier film used the film of (X) or (Y).

(X) Gas-barrier film The gas-barrier film obtained by the above-mentioned "Method for producing gas-barrier film" was used as it was.

(Y) Laminated film using a gas barrier film The first substrate is compounded with Dick Dry LX-500 and KW-75 (both manufactured by DIC) at a compounding ratio of 10/1, and the nonvolatile content is 20%. The adhesive obtained by blending ethyl acetate so as to become is coated to a coating amount of 2.0 g / m ² (solid content) using a bar coater # 9, and the solvent is heated by a hot air at 80 ° C. with a dryer. Was allowed to evaporate.
Subsequently, dry lamination was performed with the second base material at a temperature of 40 ° C., a pressure of 0.4 MPa, and a laminating speed of 40 m / min to obtain a laminated film. The laminated film was cured at 40 ° C./3 days to form a “laminated film”.
The gas barrier film obtained by the above-mentioned "method for producing a gas barrier film" was used as the first substrate or the second substrate. When using as a first base material, it coated so that the application side of adhesives might be a coating layer.
Here, the film abbreviations used are as follows.
-PET film: E5100 # 12 (made by Toyobo Co., Ltd.)
Stretched vapor-deposited film / Aluminum-deposited PET film: 1510 # 12 (made by Toray Film Co., Ltd.)
Unstretched film · LLDPE film: TUX-HC # 40 (made by Mitsui Chemicals Tosoh Co., Ltd.)
Unstretched deposited film · Aluminum deposited CPP film: 2203 # 25 (made by Toray Film Co., Ltd.)
Aluminum-deposited LLDPE film: TUX-F # 30 (manufactured by Mitsui Chemicals Toshiro Co., Ltd.)

(1) Oxygen Permeability Measurement Method Using the gas barrier film of (X), the laminated film of (Y), and an untreated vapor-deposited film as a reference example, using an oxygen permeability measurement device OX-TRAN 2/21 MH manufactured by Mocon Corporation. It was measured in an atmosphere of 23 ° C. and 90% RH according to JIS-K7126 (isostatic pressure method). Here, RH indicates humidity.

(2) Water vapor permeability measurement method Conductivity method using the gas barrier film of (X), the laminated film of (Y), and an untreated vapor-deposited film as a reference example, using a water vapor permeability measurement device 7002 manufactured by Illinois. It was measured in an atmosphere of 40 ° C. and 90% RH according to “ISO-15106-3”.

(3) Lamination Strength Measurement Method The gas barrier film of (X), the laminated film of (Y), and an untreated vapor-deposited film as a reference example are cut in parallel with the coating direction to a width of 15 mm. The tensile strength at the time of peeling between laminated films by the 180 degree peeling method is set as the lamination strength, using an STD-1225L table-top material tester made by And Day, setting the atmosphere temperature to 25 ° C. and the peeling speed to 300 mm / min. did. The unit of laminate strength was N / 15 mm.

(4) Blocking resistance (coating drying characteristics)
The gas barrier films of (X) were compared in a state immediately after drying by a touch sensory test by touching with a finger. The case where the tackiness did not remain was ○, and the case where the tackiness remained was ×. If tackiness remains at this point, it indicates that there is a high possibility that the film can not be handled in a state of being wound on a roll after drying.

The results of Examples and Comparative Examples are shown in Tables 4 to 12. In the table, the types and amounts of the main agent, curing agent and solvent used are listed. In addition to these, various evaluation results are written. In the table, "-" represents that it has not been measured, the numbers in the compounding amount represent "parts" and the blanks represent "zero".

In the table, the abbreviations have the following meanings.
Gly ratio: Gly ratio (mol%)
DC acid content: dicarboxylic acid content (mol%)
Measurement Mn: Number average molecular weight (measurement value)
Tg: glass transition temperature (DSC measurement value)
Design Mn: Number average molecular weight (design value)
Actual: Example ratio: Comparative example base material: base film oxygen permeability: oxygen permeability (cc / m2 / day / atm @ 90% RH)
Water vapor transmission rate: Water vapor transmission rate (g / m2 / day)
Lamination strength: Lamination strength (N / 15 mm) DC acid content in 180 degree peel-cured film: Ortho-oriented aromatic dicarboxylic acid ratio in cured film (% by weight)
Ad-cf: Cohesive failure of adhesive PE elongation: LLDPE film elongation deposition / coating: Peeling between the deposited layer and the coated layer "Ad-cf" and "PE elongation" have good adhesion between the deposited layer and the coated layer "Deposition / coat" indicates that the adhesion between the deposited layer and the coated layer is not good.

(Reference Examples 1 to 3)
In order to clarify the gas barrier effect of the coating agent for a vapor deposition film of the present invention, the oxygen permeability and water vapor transmission of the vapor deposition film used in each example and comparative example as reference examples are in the untreated state (that is, before the coating of the present invention). The rate was measured. The results are shown in Table 13.

As described above, it contains 10 to 70 mol% of at least one ortho-orientation aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount of the polyvalent carboxylic acid component (A1) shown in Examples 1 to 15. The coating agent containing 50 to 100 mol% of glycerol relative to the total amount of the polyhydric alcohol component (B2) has low permeation of both oxygen and water vapor as compared to the vapor-deposited film to which the coating agent of the reference example is not applied. It exhibits excellent properties as a coating agent that shows the rate and improves the barrier function. Also, in any of the examples, the laminate film showed high laminate strength and showed excellent blocking resistance (coating film drying characteristic).

On the other hand, in Comparative Examples 1 to 4, although a certain improvement in the barrier function was observed, the laminate film showed almost no laminate strength because it became a hard coating film derived from the chemical structure of the curing agent. In addition, in Comparative Examples 5 to 7 similarly having no essential structure of the present invention, strong adhesiveness remained after gas drying, which strongly suggested the possibility of problems such as blocking.

Claims (9)

1. It is a coating agent for vapor deposition films which comprises polyisocyanate compound (A) and polyester (B),
   The polyisocyanate compound (A) has an ester skeleton derived from polyester (A3) which is a polycondensate of polyvalent carboxylic acid component (A1) and polyvalent alcohol component (A2), and the polyvalent carboxylic acid A polyisocyanate compound (A) containing 10 to 70 mol% of at least one ortho-oriented aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount of the component (A1),
   The polyester (B) is a polycondensate of a polyvalent carboxylic acid component (B1) containing at least one of an ortho-oriented aromatic dicarboxylic acid or an anhydride thereof and a polyvalent alcohol component (B2), and the polyvalent alcohol component (B2) A coating agent for a deposited film, comprising 50 to 100 mol% of glycerol based on the total amount.
2. The coating agent for vapor deposition films of Claim 1 in which a polyhydric-alcohol component (A2) contains at least 1 sort (s) chosen from the group which consists of ethylene glycol, propylene glycol, butylene glycol, and neopentyl glycol.
3. The coating agent for a deposited film according to claim 1 or 2, wherein the number average molecular weight of the polyester compound (A3) is in the range of 300 to 2,000.
4. The coating agent for a deposited film according to any one of claims 1 to 3, wherein the terminal isocyanate group of the polyisocyanate compound (A) is any of xylylene diisocyanate group, tolylene diisocyanate group, or diphenylmethane diisocyanate group.
5. The vapor deposition film according to any one of claims 1 to 4, which contains 70 to 100 mol% of at least one ortho-orientation aromatic dicarboxylic acid or an acid anhydride thereof with respect to the total amount of the polyvalent carboxylic acid component (B1). Coating agent.
6. The coating agent for a deposited film according to any one of claims 1 to 5, wherein the number average molecular weight of the polyester (B) is in the range of 1,000 to 30,000.
7. A gas barrier film obtained by coating a vapor deposition film with the coating agent according to any one of claims 1 to 6.
8. The gas barrier film according to claim 7, wherein the vapor deposition film is an aluminum vapor deposition film.
9. A packaging material using the gas barrier film according to any one of claims 7 and 8.