JP5442382B2 - container - Google Patents

Description

  The present invention relates to a molded body, and relates to, for example, a molded body in contact with beverages, seasonings, detergents, medical liquids, automotive liquids, industrial liquids, and the like.

  As an alternative to a glass bottle, a container having an oxygen barrier property has been proposed (Patent Document 1). The container of Patent Document 1 includes a base material (I), a gas barrier resin layer coated on the base material (I), and (II). The gas barrier resin layer (II) is formed of a mixed composition comprising a polycarboxylic acid polymer (A), a polyvalent metal compound (B), a volatile base (C), and water. However, the gas barrier resin layer (II) used in Patent Document 1 has insufficient gas barrier properties under high humidity. Therefore, in the container of Patent Document 1, in order to ensure gas barrier properties under high humidity, it is necessary to apply a water-resistant resin layer (III) on the gas barrier resin layer (II). Met.

  In addition, a laminate that can be used for a fuel container for automobiles has also been proposed (Patent Document 2). The laminate of Patent Document 2 includes at least two layers of an ethylene-vinyl alcohol copolymer layer and a polyamide layer. The polyamide layer contains a polyamide resin and a layered silicate that is uniformly dispersed in the polyamide resin. However, in recent years, the demand for gasoline barrier properties for fuel containers such as gasoline tanks has become stricter, and a molded article having better gasoline barrier properties has been demanded.

  Therefore, the present inventors have proposed a molded body using a specific gas barrier layer having excellent gas barrier properties (Patent Document 3).

JP 2004-511146 A JP 2004-209972 A JP 2006-335042 A

  The molded body of Patent Document 3 exhibits high oxygen barrier properties and high gasoline barrier properties. However, the molded body may be exposed to severe bending and impact depending on the application, and further improvement of the durability of the barrier layer against bending and impact is required. By making the barrier layer thin, it is possible to enhance the durability of the barrier layer against bending and impact. However, in the molded article of Patent Document 3, when the barrier layer is thinned, the oxygen barrier property and the gasoline barrier property may be greatly reduced.

  Accordingly, an object of the present invention is to provide a molded body that can maintain barrier properties such as oxygen barrier properties and gasoline barrier properties even when harsh handling is performed.

  As a result of studying to achieve the above object, the present inventors have found that a molded body that can achieve the above object can be obtained by using a barrier layer made of a specific composition. The present invention is based on this novel finding.

The molded body of the present invention includes a base material and at least one gas barrier layer laminated on the base material. The layer having gas barrier property includes a hydrolysis condensate of at least one compound (L) containing a hydrolyzable characteristic group, and at least one functional group selected from a carboxyl group and a carboxylic anhydride group. It consists of a composition containing the neutralized material of polymer (X) to contain. The compound (L) includes a compound (A) and a compound (B) containing Si to which a hydrolyzable characteristic group is bonded. The compound (A) is at least one compound represented by the following formula (I).
M ¹ X ¹ _m Y ¹ _nm (I)
[In Formula (I), M ¹ represents any one selected from Al, Ti, and Zr. X ¹ represents any one selected from F, Cl, Br, I, OR ¹ , R ² COO, R ³ COCHCOR ⁴ , and NO ₃ . Y ¹ represents any one selected from F, Cl, Br, I, OR ⁵ , R ⁶ COO, R ⁷ COCHCOR ⁸ , NO ₃ and R ⁹ . R ¹ , R ² , R ⁵ and R ⁶ each independently represents a hydrogen atom or an alkyl group. R ³ , R ⁴ , R ⁷ , R ⁸ and R ⁹ each independently represents an alkyl group. n is equal to the valence of M ¹ . m represents an integer of 1 to n. ]

The compound (B) includes at least one compound represented by the following formula (II).
Si (OR ¹⁰ ) _p R ¹¹ _4-pq X ² _q (II)
[In the formula (II), R ¹⁰ represents an alkyl group. R ¹¹ represents an alkyl group, an aralkyl group, an aryl group or an alkenyl group. X ² represents a halogen atom. p and q represent the integer of 0-4 each independently. 1 ≦ p + q ≦ 4. ]

At least a part of the —COO— group contained in the functional group of the polymer (X) is neutralized with a divalent or higher valent metal ion. The proportion of the compound represented by the formula (II) in the compound (B) is 80 mol% or more. In the composition, a ratio of [number of moles of the M ¹ atom derived from the compound (A)] / [number of moles of Si atom derived from the compound (B)] is 0.1 / 99.9 to 35. It is in the range of 0.0 / 65.0.

  Even if the gas barrier layer used in the present invention is thin, there is little decrease in barrier properties such as oxygen barrier properties and gasoline barrier properties. Therefore, the durability of the gas barrier layer against bending and impact can be enhanced by making the gas barrier layer thin as long as high barrier properties can be maintained. By using the gas barrier layer, it is possible to obtain a molded product that can maintain barrier properties such as oxygen barrier properties and gasoline barrier properties even when harsh handling is performed.

  Embodiments of the present invention will be described below. In the following description, a specific compound may be exemplified as a substance that exhibits a specific function, but the present invention is not limited to this. In addition, the materials exemplified may be used alone or in combination unless otherwise specified.

[Molded product of the present invention (molded product (II))]
The molded body of the present invention (hereinafter sometimes referred to as “molded body (II)”) includes a molded base material and at least one specific layer having gas barrier properties laminated on the base material. Hereinafter, the molded substrate may be referred to as “molded body (I)”. In addition, the specific layer having gas barrier properties may be hereinafter referred to as “gas barrier layer”. The molded object of this invention can be manufactured by forming a gas barrier layer in the outer surface and / or inner surface of the molded object (I) which is a base material. A method for forming the gas barrier layer will be described later.

  Examples of the form of the molded body (II) (form of the molded body (I)) include forms of containers such as bottles, cups and trays, hollow forms such as tubes and hoses, and forms such as tanks. As a method for producing the molded body (I), a known molding method can be applied.

[Base Material (Molded Body (I))]
The material and configuration of the molded body (I) are not particularly limited. The molded body (I) may be either a single layer body or a multilayer body.

  Specific examples of single layer materials include polyesters such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate; nylon 6, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6.66, nylon MXD6. Polyamides such as (metaxylylenediamine and adipic acid polycondensate); polyolefins such as low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene; polyacryl such as polymethyl methacrylate; poly Polyethers such as ether sulfone, polyphenylene sulfide, and polyphenylene oxide; ethylene-vinyl alcohol copolymer (EVOH) and the like are included.

  Specific examples of the multilayer body include polyolefin layer / ethylene-vinyl alcohol copolymer layer / polyolefin layer, polyester layer / ethylene-vinyl alcohol copolymer layer / polyester layer, polyolefin layer / polyamide layer / polyolefin layer, polyester layer / A multilayer body having a configuration of polyamide layer / polyester layer and a multilayer body including these are included. If necessary, an adhesive layer may be disposed between the layers. Specific examples of the polyolefin, polyester, and polyamide include the same specific examples as the single layer material. Examples of preferable multilayer bodies from the viewpoint of gas barrier properties and mechanical properties include polyolefin layers / ethylene-vinyl alcohol copolymer layers / polyolefin layers, and polyester layers / ethylene-vinyl alcohol copolymer layers / polyester layers. The multilayer body which has the structure of, is included. A preferred example of the substrate is a multilayer body including an ethylene-vinyl alcohol copolymer layer.

[Gas barrier layer]
The gas barrier layer is made of a specific composition. The composition comprises a hydrolyzate condensate of at least one compound (L) containing a hydrolyzable characteristic group and at least one functional group selected from a carboxyl group and a carboxylic anhydride group. And a neutralized product of the combined (X). The compound (L) is at least one compound containing a hydrolyzable characteristic group, and is typically at least one compound containing a metal atom to which the hydrolyzable characteristic group is bonded. . The compound (L) includes a compound (A) and a compound (B) containing Si to which a hydrolyzable characteristic group is bonded. Hereinafter, at least one functional group selected from a carboxyl group and a carboxylic anhydride group contained in the polymer (X) may be referred to as “functional group (F)”. At least a part of the —COO— group contained in the functional group (F) is neutralized with a divalent or higher valent metal ion. From another viewpoint, the —COO— group contained in the functional group (F) constitutes a salt with a divalent or higher metal ion.

  The gas barrier layer is laminated on at least one surface of the substrate. A gas barrier layer may be laminated | stacked only on the single side | surface of a base material, and may be laminated | stacked on both surfaces of a base material. Layers other than the gas barrier layer may be laminated on the substrate.

  The proportion of the hydrolyzed condensate of compound (L) and the neutralized product of polymer (X) in the composition is, for example, 50% by weight, 70% by weight, 80% by weight, 90% by weight, 95% by weight. % Or more, or 98% by weight or more.

[Hydrolysis condensate]
The composition which comprises a gas barrier layer contains the hydrolysis-condensation product of a compound (L). By hydrolyzing the compound (L), at least a part of the characteristic group of the compound (L) is substituted with a hydroxyl group. Furthermore, the hydrolyzate condenses to form a compound in which metal atoms are bonded through oxygen. When this condensation is repeated, it becomes a compound that can be regarded as a metal oxide substantially. Here, in order for this hydrolysis and condensation to occur, it is important that the compound (L) contains a hydrolyzable characteristic group (functional group). When those groups are not bonded, hydrolysis / condensation reaction does not occur or becomes extremely slow, and it is difficult to obtain the effects of the present invention. Si may be classified as a metalloid element, but in this specification, Si is described as a metal.

  This hydrolysis-condensation product can be manufactured from a specific raw material using the method used by the well-known sol-gel method, for example. The raw materials include compound (L), compound (L) partially hydrolyzed, compound (L) completely hydrolyzed, compound (L) partially hydrolyzed / condensed, A compound in which the compound (L) is completely hydrolyzed and partly condensed, or a combination thereof is used. These raw materials may be produced by a known method, or commercially available ones may be used. Although there is no particular limitation, for example, a condensate obtained by hydrolysis and condensation of about 2 to 10 molecules can be used as a raw material. Specifically, for example, a material obtained by hydrolyzing and condensing tetramethoxysilane into a dimer to 10-mer linear condensate can be used as a raw material.

Compound (A) is at least one compound represented by the following formula (I).
M ¹ X ¹ _m Y ¹ _nm (I)
[In Formula (I), M ¹ represents any one selected from Al, Ti, and Zr. X ¹ represents any one selected from F, Cl, Br, I, OR ¹ , R ² COO, R ³ COCHCOR ⁴ , and NO ₃ . Y ¹ represents any one selected from F, Cl, Br, I, OR ⁵ , R ⁶ COO, R ⁷ COCHCOR ⁸ , NO ₃ and R ⁹ . R ¹ , R ² , R ⁵ and R ⁶ each independently represents a hydrogen atom or an alkyl group. R ³ , R ⁴ , R ⁷ , R ⁸ and R ⁹ each independently represents an alkyl group. n is equal to the valence of M ¹ . m represents an integer of 1 to n. ]

X ¹ and Y ¹ may be the same or different. M ¹ is preferably Al from the viewpoint of improving the oxygen barrier property and gasoline barrier property of the obtained molded body (II). X ¹ is a group having hydrolyzability. X ¹ is preferably any one selected from Cl, OR ¹ , and NO ₃ , and more preferably OR ¹ . Y ¹ is preferably any one selected from Cl, OR ⁵ , and NO ₃ , and more preferably OR ⁵ .

The carbon number of the alkyl group used for R ¹ , R ² , R ⁵ and R ⁶ is preferably 1 or more and 20 or less, more preferably 1 or more and 10 or less, for example 1 or more and 4 or less. R ¹ and R ⁵ are preferably a methyl group, an ethyl group, an iso-propyl group, an n-butyl group, or a t-butyl group, and particularly preferably an iso-propyl group or an n-butyl group. The number of carbon atoms of the alkyl group used for R ³ , R ⁴ , R ⁷ , R ⁸ and R ⁹ is preferably 1 or more and 4 or less, more preferably 1 or more and 2 or less. R ³ , R ⁴ , R ⁷ and R ⁸ are preferably a methyl group or an ethyl group. R ³ COCHCOR ⁴ and R ⁷ COCHCOR ⁸ can be coordinated to atom M ¹ at the carbonyl group. R ⁹ is preferably a methyl group or an ethyl group. R ⁹ usually does not have a functional group. In the formula (I), [nm] may be 0 or 1, for example.

  Specific examples of the compound (A) include aluminum chloride, aluminum triethoxide, aluminum trinormal propoxide, aluminum triisopropoxide, aluminum trinormal butoxide, aluminum tri-t-butoxide, aluminum triacetate, aluminum acetylacetonate, nitric acid Aluminum compounds such as aluminum; titanium compounds such as titanium tetraisopropoxide, titanium tetranormal butoxide, titanium tetra (2-ethylhexoxide), titanium tetramethoxide, titanium acetylacetonate, titanium ethylacetoacetate; zirconium tetranormal Zirconium compounds such as propoxide, zirconium tetrabutoxide, zirconium tetraacetylacetonate and the like are included. Preferable examples of compound (A) include aluminum triisopropoxide and aluminum trinormal butoxide.

The compound (B) is at least one Si compound containing Si to which a hydrolyzable characteristic group is bonded. The compound (B) includes at least one compound represented by the following formula (II).
Si (OR ¹⁰ ) _p R ¹¹ _4-pq X ² _q (II)
[In the formula (II), R ¹⁰ represents an alkyl group. R ¹¹ represents an alkyl group, an aralkyl group, an aryl group or an alkenyl group. X ² represents a halogen atom. p and q represent the integer of 0-4 each independently. 1 ≦ p + q ≦ 4. ]

Examples of the alkyl group represented by R ¹⁰ include a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, a t-butyl group, and the like, preferably a methyl group or an ethyl group. Examples of the halogen atom represented by X ² include a chlorine atom, a bromine atom, and an iodine atom, and a chlorine atom is preferable. Examples of the alkyl group represented by R ¹¹ include a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, a t-butyl group, and an n-octyl group. As the aralkyl group, For example, benzyl group, phenethyl group, trityl group and the like can be mentioned. In addition, examples of the aryl group represented by R ¹¹ include a phenyl group, a naphthyl group, a tolyl group, a xylyl group, and a mesityl group. Examples of the alkenyl group include a vinyl group and an allyl group.

  Specific examples of the compound (B) represented by the formula (II) include tetrachlorosilane, tetrabromosilane, tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, octyltrimethoxysilane, phenyltri Methoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, chlorotrimethoxysilane, chlorotriethoxysilane, dichlorodimethoxysilane, dichlorodiethoxysilane, trichloromethoxysilane, trichloroethoxysilane, and vinyltrichlorosilane are included. Preferred examples of the compound (B) represented by the formula (II) include tetramethoxysilane and tetraethoxysilane.

Compound (B) may further contain at least one compound represented by the following formula (III) in addition to the compound represented by formula (II). By containing the compound represented by the formula (III), the resulting molded article (II) has an even better oxygen barrier property and / or gasoline barrier property.
Si (OR ¹² ) _r X ³ _s Z ³ _4-rs (III)
[In the formula (III), R ¹² represents an alkyl group. X ³ represents a halogen atom. Z ³ represents an alkyl group substituted with a functional group having reactivity with a carboxyl group. r and s each independently represent an integer of 0 to 3. 1 ≦ r + s ≦ 3. ]

Examples of the alkyl group represented by R ¹² include a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, a t-butyl group, and the like, and preferably a methyl group or an ethyl group. Examples of the halogen atom represented by X ³ include a chlorine atom, a bromine atom, and an iodine atom, and a chlorine atom is preferable. Examples of the functional group having reactivity with a carboxyl group that Z ³ has include an epoxy group, an amino group, a hydroxyl group, a halogen atom, a mercapto group, an isocyanate group, a ureido group, an oxazoline group, and a carbodiimide group. Among these, an epoxy group, an amino group, an isocyanate group, a ureido group or a halogen atom is preferable from the viewpoint of improving the oxygen barrier property and / or gasoline barrier property of the obtained molded product (II). You may use at least 1 sort (s) chosen from group and an isocyanate group. Examples of the alkyl group substituted with such a functional group include those exemplified for R ¹² .

  Specific examples of the compound represented by the formula (III) include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrichlorosilane, γ-aminopropyltrisilane. Methoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltrichlorosilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, γ-chloropropyltrichlorosilane, γ-bromopropyltrimethoxysilane, γ -Bromopropyltriethoxysilane, γ-bromopropyltrichlorosilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropyltrichlorosilane, γ-isocyanatopropyltrimethoxysilane , .Gamma. isocyanatopropyltriethoxysilane, .gamma. isocyanate propyl trichlorosilane, .gamma.-ureidopropyltrimethoxysilane, .gamma.-ureidopropyltriethoxysilane include .gamma. ureidopropyltrimethoxysilane trichlorosilane. Preferred examples of the compound represented by the formula (III) include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-chloropropyltrimethoxysilane, and γ-chloropropyltriethoxysilane. , Γ-aminopropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

  The present inventors have found that the molded article (II) obtained exhibits excellent gas barrier properties by using a hydrolysis condensate of the compound (L) containing the compound (A) and the compound (B). . As described above, when the gas barrier layer of the molded body is thinned, the gas barrier property has been decreased exponentially in the past, and sometimes the excellent gas barrier property cannot be maintained. On the other hand, by using the hydrolysis condensate of compound (L), high gas barrier properties can be maintained even if the gas barrier layer is thinned.

In any case where the compound (B) is composed only of the compound of the formula (II) and the compound (B) contains the compound of the formula (III), [the M ¹ atom derived from the compound (A) The ratio of [number of moles] / [number of moles of Si atoms derived from compound (B)] is 0.1 / 99.9 to 35.0 / 65.0 (for example, 0.1 / 99.9 to 30.0). /70.0, or 0.1 / 99.9 to 29.9 / 70.1). When the molar ratio is within this range, a molded product (II) exhibiting excellent gas barrier properties can be obtained. If the ratio of M ¹ to the total of M ¹ and Si is higher than 35 mol%, the gas barrier property is lowered, and if it is lower than 0.1 mol%, the gas barrier property after severe handling is lowered. . From the viewpoint of better gas barrier properties, the ratio of [number of moles of M ¹ atom derived from compound (A)] / [number of moles of Si atom derived from compound (B)] is preferably 1.2 / It exists in the range of 98.8-30.0 / 70.0, More preferably, it exists in the range of 1.9 / 98.1-30.0 / 70.0, More preferably, it is 2.8 / 97.2. It is in the range of 30.0 / 70.0. The ratio is in the range of 0.5 / 99.5 to 30.0 / 70.0, in the range of 1.5 / 98.5 to 20.0 / 80.0, or 2.5 / 97.5 to 10 It may be in the range of 0.0 / 90.0.

  The present inventors use, in addition to the compound represented by the compound (A) and the formula (II), a hydrolysis condensate of the compound (L) further comprising a compound represented by the formula (III), It has been found that the obtained molded product (II) exhibits further excellent gas barrier properties.

  In the case where the compound (B) contains a compound represented by the formula (III), it is preferable that the following conditions are further satisfied. That is, the ratio of [number of moles of Si derived from the compound represented by formula (II)] / [number of moles of Si derived from the compound represented by formula (III)] was 99.5 / 0.5 to It is preferably in the range of 80.0 / 20.0. When this ratio is larger than 99.5 / 0.5, and when this ratio is smaller than 80.0 / 20.0, the gas barrier property of the obtained molded body (II) may be lowered. is there. Further, this ratio is more preferably in the range of 98.0 / 2.0 to 89.9 / 10.1 from the viewpoint of better gas barrier properties of the molded body (II).

  The total ratio of the compound (A) and the compound (B) in the compound (L) is, for example, 80 mol% or more and 100 mol% or less, 90 mol% or more, 95 mol% or more, 98 mol% or more, 99 It may be mol% or more, or 100 mol%.

  The proportion of the compound represented by the formula (II) in the compound (B) (Si compound as the compound (L)) is 80 mol% or more and 100 mol% or less, for example, 90 mol% or more, 95 mol% or more. 98 mol% or more, or 100 mol%. In one example, the compound (B) consists only of the compound represented by the formula (II), and in another example, the compound (B) is represented by the compound represented by the formula (II) and the formula (III). It consists only of a compound.

  The number of molecules condensed in the hydrolyzed condensate of compound (L) can be controlled by the conditions for performing hydrolysis and condensation. For example, the number of molecules to be condensed can be controlled by the amount of water, the type and concentration of the catalyst, the temperature at which hydrolysis condensation is performed, and the like.

  Since the composition constituting the gas barrier layer has better gas barrier properties of the molded body (II), [weight of inorganic component derived from compound (L)] / [weight of organic component derived from compound (L)] And the sum of the weight of the organic component derived from the polymer (X)] is preferably in the range of 20.0 / 80.0 to 80.0 / 20.0. 30.5 / 69.5 More preferably in the range of ~ 70/30.

  The weight of the inorganic component derived from the compound (L) can be calculated from the weight of the raw material used when preparing the composition. That is, compound (L), compound (L) partially hydrolyzed, compound (L) completely hydrolyzed, compound (L) partially hydrolyzed, compound (L) Assuming that the product is completely hydrolyzed and partly condensed, or a combination of these, is completely hydrolyzed and condensed into a metal oxide, and the weight of the metal oxide is calculated as compound (L). It is regarded as the weight of the inorganic component derived from.

More specifically describing the calculation of the weight of the metal oxide, when the compound (A) represented by the formula (I) does not contain R ⁹ , when it is completely hydrolyzed and condensed, the composition formula is This is a compound represented by M ^{1 On} _{/ 2} . In addition, when the compound (A) represented by the formula (I) contains R ⁹ , when it is completely hydrolyzed / condensed, the compound represented by the formula M ¹ O _{m / 2} R ⁹ _nm It becomes. Of this compound, the M ¹ O _{m / 2} portion is a metal oxide. R ⁹ is an organic component derived from the compound (L). Moreover, it calculates similarly about a compound (B). At this time, R ¹¹ and Z ³ are organic components derived from the compound (L). The value obtained by dividing the weight of the metal oxide by the weight of the active ingredient added until the end of the step (i) described later and multiplying the value by 100 is the content (%) of the hydrolysis condensate in this specification. It is. Here, the weight of the active ingredient refers to a compound or solvent generated in the process in which the above-described compound (L) is converted into a metal oxide from the weight of all the ingredients added until the end of the step (i) described later. This is the weight excluding the weight of volatile components.

  When the polymer (X) is neutralized by ions not containing metal ions (for example, ammonium ions), the weight of the ions (for example, ammonium ions) is also the weight of the organic component derived from the polymer (X). Added to.

[Carboxylic acid-containing polymer (polymer (X))]
The composition constituting the gas barrier layer includes a neutralized product of a polymer containing at least one functional group selected from a carboxyl group and a carboxylic anhydride group. Hereinafter, the polymer may be referred to as “carboxylic acid-containing polymer”. The neutralized product of the carboxylic acid-containing polymer can be obtained by neutralizing at least a part of the —COO— group contained in the functional group of the carboxylic acid-containing polymer with a divalent or higher metal ion. The carboxylic acid-containing polymer has two or more carboxyl groups or one or more carboxylic anhydride groups in one polymer molecule. Specifically, a polymer containing two or more structural units having one or more carboxyl groups such as an acrylic acid unit, a methacrylic acid unit, a maleic acid unit, and an itaconic acid unit in one molecule of the polymer is used. it can. Moreover, the polymer containing the structural unit which has the structure of carboxylic anhydrides, such as a maleic anhydride unit and a phthalic anhydride unit, can also be used. One type or two types of structural units having one or more carboxyl groups and / or structural units having a structure of carboxylic anhydride (hereinafter, these may be collectively referred to as “carboxylic acid-containing units (G)”) The above may be contained in the carboxylic acid-containing polymer.

  Moreover, the molded object (II) with favorable gas-barrier property is obtained by making the content rate of the carboxylic acid containing unit (G) which occupies for all the structural units of a carboxylic acid containing polymer into 10 mol% or more. The content is more preferably 20 mol% or more, further preferably 40 mol% or more, and particularly preferably 70 mol% or more. In addition, when a carboxylic acid containing polymer contains both the structural unit which contains 1 or more of carboxyl groups, and the structural unit which has a structure of a carboxylic anhydride, the sum total of both should just be said range.

  Other structural units other than the carboxylic acid-containing unit (G) that may be contained in the carboxylic acid-containing polymer are not particularly limited, but are methyl acrylate units, methyl methacrylate units, ethyl acrylate units, methacrylic acid. Structural units derived from (meth) acrylic esters such as ethyl units, butyl acrylate units and butyl methacrylate units; structural units derived from vinyl esters such as vinyl formate units and vinyl acetate units; styrene units, One or more structural units selected from p-styrene sulfonic acid units; structural units derived from olefins such as ethylene units, propylene units, and isobutylene units. When the carboxylic acid-containing polymer contains two or more structural units, the carboxylic acid-containing polymer is in the form of an alternating copolymer, a random copolymer, a block copolymer, or a taper. It may be in the form of a type copolymer.

  Specific examples of the carboxylic acid-containing polymer include polyacrylic acid, polymethacrylic acid, and poly (acrylic acid / methacrylic acid). The carboxylic acid-containing polymer may be at least one polymer selected from polyacrylic acid and polymethacrylic acid. Specific examples in the case of containing other structural units other than the above-described carboxylic acid-containing unit (G) include ethylene-maleic anhydride copolymers, styrene-maleic anhydride copolymers, and isobutylene-maleic anhydride. Examples thereof include an alternating copolymer, an ethylene-acrylic acid copolymer, and a saponified ethylene-ethyl acrylate copolymer.

  The molecular weight of the carboxylic acid-containing polymer is not particularly limited, but the number average molecular weight is 5,000 or more because the molded article (II) obtained has excellent gas barrier properties and excellent mechanical properties such as drop impact strength. Preferably, it is 10,000 or more, more preferably 20,000 or more. The upper limit of the number average molecular weight of the carboxylic acid-containing polymer is not particularly limited, but is generally 1,500,000 or less.

  Further, the molecular weight distribution of the carboxylic acid-containing polymer is not particularly limited, but from the viewpoint of improving the surface appearance such as haze of the molded body (II) and the storage stability of the solution (U) described later. The molecular weight distribution represented by the ratio of weight average molecular weight / number average molecular weight of the carboxylic acid-containing polymer is preferably in the range of 1 to 6, more preferably in the range of 1 to 5, More preferably, it is in the range.

[Neutralization (ionization)]
The neutralized product of the carboxylic acid-containing polymer is a divalent or higher-valent metal having at least a part of at least one functional group (functional group (F)) selected from the carboxyl group and carboxylic anhydride group of the carboxylic acid-containing polymer. Obtained by neutralization with ions. In other words, this polymer contains a carboxyl group neutralized with a divalent or higher metal ion.

  It is important that the metal ion neutralizing the functional group (F) is divalent or higher. When the functional group (F) is not neutralized or neutralized only by monovalent ions, a laminate having good gas barrier properties cannot be obtained. Specific examples of divalent or higher metal ions include calcium ions, magnesium ions, divalent iron ions, trivalent iron ions, zinc ions, divalent copper ions, lead ions, divalent mercury ions, barium ions, A nickel ion, a zirconium ion, an aluminum ion, a titanium ion, etc. can be mentioned. For example, the divalent or higher valent metal ion may be at least one ion selected from the group consisting of calcium ion, magnesium ion, barium ion, zinc ion, iron ion and aluminum ion.

  For example, 10 mol% or more (for example, 15 mol% or more) of the —COO— group contained in the functional group (F) of the carboxylic acid-containing polymer is neutralized with a divalent or more metal ion. When the carboxyl group and / or carboxylic anhydride group in the carboxylic acid-containing polymer is neutralized with a divalent or higher metal ion, the molded product (II) exhibits good gas barrier properties.

  Note that the carboxylic anhydride group is considered to contain two —COO— groups. That is, when there are a moles of carboxyl groups and b moles of carboxylic anhydride groups, the total number of —COO— groups contained is (a + 2b) moles. The proportion of the -COO- group contained in the functional group (F) that is neutralized with a divalent or higher metal ion is preferably 60 mol% or more and 100 mol% or less, more preferably 70 mol% or more. More preferably, it is 80 mol% or more. By increasing the proportion of neutralization, higher gas barrier properties can be realized.

  The degree of neutralization (ionization degree) of the functional group (F) is determined by measuring the infrared absorption spectrum of the molded product (II) by the ATR method (total reflection measurement method) or by removing the gas barrier layer from the molded product (II). It can be determined by scraping and measuring the infrared absorption spectrum by the KBr method. It can also be obtained from the value of the fluorescent X-ray intensity of the metal element used for ionization by fluorescent X-ray measurement.

The infrared absorption spectrum peak attributed to C = O stretching vibration of the carboxyl group or carboxylic anhydride group before the neutralization (ionization front) is observed in the range of 1600cm ^-1 ~1850cm ^-1, neutralization (ionization ), The C═O stretching vibration of the carboxyl group is observed in the range of 1500 cm ^{−1 to} 1600 cm ⁻¹ , so that both can be separated and evaluated in the infrared absorption spectrum. Specifically, the ratio can be obtained from the maximum absorbance in each range, and the ionization degree of the polymer constituting the gas barrier layer in the molded body (II) can be calculated using a calibration curve prepared in advance. A calibration curve can be created by measuring infrared absorption spectra for a plurality of standard samples having different degrees of neutralization.

  When the film thickness of the gas barrier layer is 1 μm or less and the substrate contains an ester bond, the ester bond peak of the substrate is detected in the infrared absorption spectrum by the ATR method, and the carboxylic acid-containing polymer constituting the gas barrier layer Since it overlaps with the —COO— peak of (= polymer (X)), the degree of ionization cannot be determined accurately. Therefore, the ionization degree of the polymer (X) constituting the gas barrier layer having a thickness of 1 μm or less is calculated based on the result of the fluorescent X-ray measurement.

  Specifically, the ionization degree of the polymer (X) constituting the gas barrier layer laminated on the substrate not containing an ester bond is measured by an infrared absorption spectrum. Next, the fluorescence X-ray intensity of the metal element used for ionization is determined by fluorescent X-ray measurement for the laminate in which the degree of ionization is measured. Then, the same measurement is implemented about the laminated body from which only an ionization degree differs. A correlation between the degree of ionization and the fluorescent X-ray intensity of the metal element used for ionization is obtained, and a calibration curve is created. And fluorescent X-ray measurement is performed about the molded object (II) using the base material containing an ester bond, and an ionization degree is calculated | required based on the said calibration curve from the fluorescence X-ray intensity of the metal element used for ionization.

[Compound (P)]
The composition constituting the gas barrier layer may contain a compound (P) containing two or more amino groups. Compound (P) is a compound different from compound (L) and polymer (X). When the compound (P) is further included, at least a part of the —COO— group contained in the functional group (F) of the polymer (X) is neutralized and / or reacted with the compound (P); Become. As the compound (P), alkylene diamines, polyalkylene polyamines, alicyclic polyamines, aromatic polyamines, polyvinyl amines and the like can be used, but the gas barrier property of the molded product (II) becomes better. From the viewpoint, alkylenediamine is preferred.

  Specific examples of the compound (P) include hydrazine, ethylenediamine, propylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diaminodiphenylmethane, 1,3-diaminocyclohexane, 1,2-diaminocyclohexane, 1,4-diaminocyclohexane. , Xylylenediamine, chitosan, polyallylamine, polyvinylamine and the like. From the viewpoint of improving the gas barrier property of the molded product (II), ethylenediamine, propylenediamine, and chitosan are preferable.

  The molar ratio of [amino group contained in compound (P)] / [-COO-group contained in the functional group of the carboxylic acid-containing polymer] is from the viewpoint that the gas barrier property of the molded product (II) becomes better. It is preferably in the range of 0.2 / 100 to 20/100, more preferably in the range of 0.5 / 100 to 15/100, and particularly preferably in the range of 1/100 to 10/100. .

  When adding the compound (P) to the carboxylic acid-containing polymer, the compound (P) may be neutralized with an acid in advance. Examples of the acid used for neutralization include hydrochloric acid, nitric acid, sulfuric acid, acetic acid, and carbonic acid. From the viewpoint of improving the gas barrier properties of the obtained molded body (II), it is preferable to use hydrochloric acid, acetic acid, and carbonic acid.

[Compound Q]
The composition constituting the gas barrier layer may contain a compound (Q) containing two or more hydroxyl groups. When the compound (Q) is further included, at least a part of the —COO— group contained in the functional group (F) of the polymer (X) reacts with the compound (Q) to form an ester bond. It becomes. According to this configuration, the gas barrier property of the gas barrier layer after bending is further improved. More specifically, by adding the compound (Q), even if the molded body (II) is bent, the gas barrier layer is hardly damaged. As a result, high gas barrier properties are maintained even after being bent.

  Compound (Q) is a compound different from compound (L) and polymer (X). The compound (Q) includes a low molecular weight compound and a high molecular weight compound. Preferred examples of the compound (Q) include polyvinyl alcohol, partially saponified polyvinyl acetate, ethylene-vinyl alcohol copolymer, polyethylene glycol, polyhydroxyethyl (meth) acrylate, polysaccharides such as starch, and starches. Polymer compounds such as polysaccharide derivatives derived from saccharides are included.

  Further, the composition constituting the gas barrier layer may be carbonate, hydrochloride, nitrate, hydrogen carbonate, sulfate, hydrogen sulfate, phosphate, boric acid within the range not impairing the effects of the present invention. Salts, inorganic acid metal salts such as aluminate; organic acid metal salts such as oxalate, acetate, tartrate, stearate; acetylacetonate metal complexes such as aluminum acetylacetonate, titanocene, etc. Metal complexes such as cyclopentadienyl metal complexes and cyano metal complexes; layered clay compounds, crosslinking agents, plasticizers, antioxidants, ultraviolet absorbers, flame retardants and the like may be contained. The composition constituting the gas barrier layer may contain a metal oxide fine powder, a silica fine powder, and the like.

  The fine structure of the gas barrier layer is not particularly limited. However, when the gas barrier layer has the fine structure described below, it is preferable because a decrease in gas barrier properties when the molded body (II) is stretched can be suppressed. . A preferable fine structure is a sea-island structure composed of a sea phase (α) and an island phase (β). The island phase (β) is a region where the ratio of the hydrolysis condensate of the compound (L) is higher than that of the sea phase (α).

  Each of the sea phase (α) and the island phase (β) preferably further has a fine structure. For example, the sea phase (α) is composed of a sea phase (α1) mainly composed of a neutralized product of a carboxylic acid-containing polymer and an island phase (α2) mainly composed of a hydrolysis condensate of the compound (L). The sea island structure to be formed may be further formed. The island phase (β) is composed of a sea phase (β1) mainly composed of a neutralized product of a carboxylic acid-containing polymer and an island phase (β2) mainly composed of a hydrolysis condensate of the compound (L). The sea island structure to be formed may be further formed. The ratio (volume ratio) of [island phase (β2) / sea phase (β1)] in the island phase (β) is the ratio of [island phase (α2) / sea phase (α1)] in the sea phase (α). Is preferably larger. The diameter of the island phase (β) is preferably in the range of 30 nm to 1200 nm, more preferably in the range of 50 to 500 nm, and still more preferably in the range of 50 nm to 400 nm. The diameter of the island phase (α2) and the island phase (β2) is preferably 50 nm or less, more preferably 30 nm or less, and even more preferably 20 nm or less.

  In order to obtain the structure as described above, it is necessary that the appropriate hydrolysis condensation of the compound (L) occurs in preference to the crosslinking reaction between the compound (L) and the carboxylic acid-containing polymer. For this purpose, the specific compound (L) is used in an appropriate ratio with the carboxylic acid-containing polymer, and the compound (L) is preliminarily hydrolyzed and condensed before mixing with the carboxylic acid-containing polymer. A method such as using a condensation catalyst can be employed.

  Moreover, when specific manufacturing conditions were selected, it was found that a region where the ratio of the hydrolysis condensate of compound (L) is high is formed in a layered manner on the surface of the gas barrier layer. Hereinafter, the layer of the hydrolytic condensate of compound (L) formed on the surface of the gas barrier layer may be referred to as “skin layer”. By forming the skin layer, the water resistance of the gas barrier layer surface is improved. The skin layer composed of the hydrolyzed condensate of compound (L) imparts hydrophobic properties to the surface of the gas barrier layer, and the molded body (II) has the property that even when the gas barrier layers wet with water are stacked, they do not stick together. ). Surprisingly, even when a skin layer having hydrophobic characteristics is formed on the surface of the gas barrier layer, the wettability of the printing ink or the like to the surface is good. The presence or absence of the skin layer of the gas barrier layer or the state of the formed skin layer varies depending on the production conditions. As a result of intensive studies, the present inventors have found that there is a correlation between the contact angle between the gas barrier layer and water and the preferred skin layer, and the preferred skin layer is formed when the contact angle satisfies the following conditions. I found out. When the contact angle between the gas barrier layer and water is less than 20 °, the formation of the skin layer may be insufficient. In this case, the surface of the gas barrier layer is likely to swell with water, and if the molded bodies (II) are stacked in a wet state, they may rarely stick together. Further, when the contact angle is 20 ° or more, the skin layer is sufficiently formed, and the surface of the gas barrier layer does not swell with water, so that no sticking occurs. The contact angle between the gas barrier layer and water is preferably 24 ° or more, and more preferably 26 ° or more. On the other hand, if the contact angle is larger than 65 °, the skin layer becomes too thick and the transparency of the molded product (II) is lowered. Therefore, the contact angle is preferably 65 ° or less, more preferably 60 ° or less, and still more preferably 58 ° or less.

  In the molded product (II) of the present invention, the total thickness of the gas barrier layers contained in the molded product (II) may be 1.0 μm or less (for example, 0.9 μm or less). By making the gas barrier layer thin, durability of the gas barrier layer against bending and impact can be enhanced. The thickness of one layer of the gas barrier layer may be 0.05 μm or more (for example, 0.15 μm or more) from the viewpoint of improving the gas barrier property of the molded body (II). Further, the total thickness of the gas barrier layer may be 0.1 μm or more (for example, 0.2 μm or more). The thickness of the gas barrier layer can be controlled by the concentration of the solution used for forming the gas barrier layer and the coating method.

[Production Method of Molded Body (II)]
Hereinafter, a method for producing the molded product (II) of the present invention will be described. According to this method, the molded body (II) can be easily produced. Since the materials used in the manufacturing method of the present invention and the configuration of the laminate are the same as those described above, description of overlapping portions may be omitted.

  This manufacturing method includes steps (i) and (ii).

  Step (i) is a step of forming, on a substrate, a layer made of a composition containing a hydrolysis condensate of compound (L) containing a hydrolyzable characteristic group and polymer (X). . The layer is formed directly on the substrate or is formed on the substrate via another layer. Compound (L) includes compound (A) and compound (B). In addition, by adding the compound (D) having a carboxyl group-containing molecular weight of 100 or less to the compound (L), the hydrolysis and condensation reactivity of the compound (L) can be controlled, and finally obtained molding The gas barrier property and hot water resistance of the body (II) are improved. Details of the compound (D) will be described later.

  About a compound (A) and a compound (B), and the ratio of those compounds, it is the same as that of what was demonstrated about the composition which comprises a gas barrier layer.

  As the substrate, a molded substrate (the molded body (I) described above) can be used. A solution containing the above composition is applied to the surface of the molded body (I). In order to improve the wettability of the surface of the molded body (I), it is preferable to perform a surface treatment on the molded body (I) before the step (i). Examples of the surface treatment include corona treatment, plasma treatment, and flame treatment. If necessary, an anchor agent may be applied to the surface of the molded body (I) subjected to the surface treatment or the surface of the molded body (I) not subjected to the surface treatment. By using the anchor agent, the surface of the molded body (I) and the layer formed thereon are sufficiently adhered, and the strength of the molded body (II) is increased. Examples of the anchor agent include urethane resin, alkyd resin, melamine resin, acrylic resin, epoxy resin, phenol resin, and the like.

  The next step (ii) is a step of bringing the layer formed in step (i) into contact with a solution containing divalent or higher-valent metal ions (hereinafter, this step may be referred to as an ionization step). For example, it can be performed by spraying a solution containing divalent or higher metal ions on the formed layer, or immersing both the base material and the layer on the base material in a solution containing divalent or higher metal ions. . By step (ii), at least a part of the —COO— group contained in the functional group (F) of the polymer (X) is neutralized.

Hereinafter, step (i) will be described in detail. In addition, when the compound (L) which is not hydrolytically condensed and a carboxylic acid containing polymer are mixed, both may react and it may become difficult to apply | coat a solution (U). Therefore, step (i)
(Ia) a solution comprising at least one compound selected from the compound (A) and a partial hydrolysis condensate of the compound (A), and a compound (D) containing a carboxyl group and having a molecular weight of 100 or less Preparing (S);
(Ib) preparing a solution (T) by mixing the solution (S) with at least one compound selected from the compound (B) and a partially hydrolyzed condensate of the compound (B);
(Ic) forming a hydrolysis condensate (oligomer (V)) of a plurality of compounds (L) containing the compound (A) and the compound (B) in the solution (T);
(Id) a step of preparing a solution (U) by mixing the solution (T) having undergone the step (ic) and the polymer (X);
(Ie) including a step of forming a layer by applying the solution (U) to a substrate and drying it.

  More specifically, the oligomer (V) obtained by hydrolyzing and condensing the compound (L) includes a compound (L) partially hydrolyzed, a compound (L) completely hydrolyzed, a compound (L ) Is partially hydrolyzed and condensed, and compound (L) is at least one metal element-containing compound selected from completely hydrolyzed and partially condensed. Hereinafter, such a metal element-containing compound may be referred to as “compound (L) -based component”. Hereinafter, the step (ia), the step (ib), the step (ic), the step (id), and the step (ie) will be described more specifically.

  Step (ia) is a step of hydrolyzing and condensing the compound (A) constituting the compound (L) under specific conditions. It is preferable to hydrolyze and condense the compound (A) in a reaction system containing the compound (A), an acid catalyst, water and, if necessary, an organic solvent. Specifically, a technique used in a known sol-gel method can be applied. When hydrolyzing and condensing, it is extremely important to add a compound (D) containing a carboxyl group and having a molecular weight of 100 or less (hereinafter sometimes simply referred to as compound (D)) in order to control the reaction. Preferably, by adding the compound (D), gelation can be suppressed in the step of hydrolyzing and condensing the compound (A).

  Compound (D) is compound (A), compound (A) partially hydrolyzed, compound (A) completely hydrolyzed, compound (A) partially hydrolyzed and condensed, And a metal element-containing compound containing at least one compound selected from those in which the compound (A) is completely hydrolyzed and partially condensed (hereinafter, this metal element-containing compound is referred to as “compound (A) component”). And the compound (D) acts on the compound (A) system component, the above-mentioned effect is exhibited. The method for adding the compound (D) is not particularly limited as long as the compound (A) is added before the component of the compound (A) is gelled by the hydrolysis condensation reaction. be able to. First, compound (D), water, and an organic solvent as necessary are mixed to prepare an aqueous solution of compound (D). Subsequently, an aqueous solution of compound (D) is added to the compound (A) system component, A solution (S) in which the compound (D) acts on the compound (A) component can be obtained. Although there is no restriction | limiting in the usage-amount of the water mixed with a compound (D), From the viewpoint of obtaining a uniform solution (S) with a high concentration, ratio of [number of moles of water] / [number of moles of compound (D)] Is preferably in the range of 25/1 to 300/1, more preferably in the range of 50/1 to 200/1, and even more preferably in the range of 75/1 to 150/1.

  From the viewpoint of improving the reaction control of the compound (A) and the gas barrier property of the molded product (II) with respect to the amount of the compound (D) used, [number of moles of the compound (D)] / [mol of the compound (A)] The ratio of [number] is preferably in the range of 0.25 / 1 to 30/1, more preferably in the range of 0.5 / 1 to 20/1, and 0.75 / 1 to 10/1. More preferably, it is in the range.

  The compound (D) is not particularly limited as long as it is a compound containing a carboxyl group and having a molecular weight of 100 or less. From the viewpoint of increasing the reaction rate between the compound (A) and the functional group (F) of the polymer (X) and improving the gas barrier property of the molded body (II), acetic acid, propionic acid, hexane are used as the compound (D). An acid etc. can be mentioned, and an acetic acid is the most preferable.

  In step (ib), a solution (T) is prepared. Specifically, for example, a solution (S) and an organic solvent as necessary are added to the compound (B) which is a constituent component of the compound (L), and then an acid catalyst, water and an organic solvent as needed are added. The solution (T) can be prepared by the method of adding.

  In the step (ic), hydrolysis and condensation are performed in a reaction system containing, for example, the compound (A) -based component, the compound (B), the acid catalyst, water, and, if necessary, an organic solvent. A technique used in a known sol-gel method can be applied to this technique. Thereby, compound (A) system component, compound (B), compound (B) partially hydrolyzed, compound (B) completely hydrolyzed, compound (B) partially hydrolyzed A solution of the metal element-containing compound containing at least one selected from the condensed product and the compound (B) which is completely hydrolyzed and partially condensed can be obtained.

  By carrying out the reaction in such a step, the generation of gel during the preparation of the oligomer (V) can be prevented, and further the reactivity of the oligomer (V) can be controlled. Therefore, gelatinization at the time of mixing oligomer (V) and polymer (X) can be prevented.

As the acid catalyst used in step (ia) and step (ib), a known acid can be used. For example, hydrochloric acid, sulfuric acid, nitric acid, p-toluenesulfonic acid, benzoic acid, acetic acid, lactic acid, Butyric acid, carbonic acid, oxalic acid, maleic acid and the like can be used. Of these, hydrochloric acid, sulfuric acid, nitric acid, acetic acid, lactic acid and butyric acid are particularly preferred. Preferred amount of acid catalyst may vary depending on the type of acid used, the metal atom to 1 mol of the compound (L), is preferably in the range of 1 × 10 ^-5 to 10 mol, 1 × 10 ^- It is more preferably in the range of ^{4 to} 5 mol, and further preferably in the range of 5 × 10 ⁻⁴ to 1 mol. When the usage-amount of an acid catalyst exists in this range, molded object (II) with high gas barrier property is obtained.

  Moreover, although the usage-amount of the water used by process (ia) and process (ib) changes with kinds of compound (L), with respect to 1 equivalent of characteristic groups which have the hydrolyzability of compound (L). The range is preferably 0.05 to 10 equivalents, more preferably 0.1 to 5 equivalents, and still more preferably 0.2 to 3 equivalents. When the amount of water used is in this range, the resulting molded article (II) has particularly excellent gas barrier properties. In addition, in the step (ia) and the step (ib), when a component containing water such as hydrochloric acid is used, the amount of water used is also taken into account the amount of water introduced by the component. Is preferably determined.

  Furthermore, in the step (ia) and the step (ib), an organic solvent may be used as necessary. The organic solvent used will not be specifically limited if it is a solvent in which compound (L) dissolves. For example, alcohols such as methanol, ethanol, isopropanol, and normal propanol are preferably used as the organic solvent, and alcohols having the same molecular structure (alkoxy component) as the alkoxy group contained in the compound (L) are more preferably used. It is done. Specifically, methanol is preferred for tetramethoxysilane and ethanol is preferred for tetraethoxysilane. The amount of the organic solvent to be used is not particularly limited, but it is preferable that the concentration of the compound (L) is 1 to 90% by weight, more preferably 10 to 80% by weight, and still more preferably 10 to 60% by weight. .

  In step (ia), step (ib), and step (ic), the temperature of the reaction system is necessarily limited when the compound (L) is hydrolyzed or condensed in the reaction system. However, it is usually in the range of 2 to 100 ° C, preferably in the range of 4 to 60 ° C, and more preferably in the range of 6 to 50 ° C. The reaction time varies depending on the reaction conditions such as the amount and type of the acid catalyst, but is usually in the range of 0.01 to 60 hours, preferably in the range of 0.1 to 12 hours, more preferably 0.8. The range is 1 to 6 hours. The reaction can be performed in an atmosphere of various gases such as air, carbon dioxide, nitrogen, and argon.

  In the step (id), the solution (T) containing the oligomer (V) obtained in the step (ic) and the carboxylic acid-containing polymer (= polymer (X)) are mixed to form a solution (U ). The solution (U) can be prepared using the solution (T), the carboxylic acid-containing polymer, and, if necessary, water and an organic solvent. For example, a method of adding and mixing the solution (T) to a solution in which the carboxylic acid-containing polymer is dissolved can be employed. Moreover, the method of adding and mixing the solution which dissolved the carboxylic acid containing polymer in water or the organic solvent to the solution (T) is also employable. In any method, the solution (T) to be added or the solution in which the carboxylic acid-containing polymer is dissolved may be added at once, or may be added in divided portions.

  The solution in which the carboxylic acid-containing polymer in step (id) is dissolved can be prepared by the following method. What is necessary is just to select the solvent to be used according to the kind of carboxylic acid containing polymer. For example, in the case of a water-soluble polymer such as polyacrylic acid or polymethacrylic acid, water is suitable. In the case of a polymer such as an isobutylene-maleic anhydride copolymer or a styrene-maleic anhydride copolymer, water containing an alkaline substance such as ammonia, sodium hydroxide, or potassium hydroxide is preferred. In addition, alcohols such as methanol and ethanol; ethers such as tetrahydrofuran, dioxane and trioxane; ketones such as acetone and methyl ethyl ketone; glycols such as ethylene glycol and propylene glycol, as long as the dissolution of the carboxylic acid-containing polymer is not hindered Glycol derivatives such as methyl cellosolve, ethyl cellosolve, n-butyl cellosolve; glycerin; acetonitrile, dimethylformamide, dimethyl sulfoxide, sulfolane, dimethoxyethane and the like can be used in combination.

  In the carboxylic acid-containing polymer contained in the solution (U), a part of the —COO— group (eg, 0.1 to 10 mol%) contained in the functional group (F) is neutralized by monovalent ions. May be. The degree of neutralization of the functional group (F) with monovalent ions is more preferably in the range of 0.5 to 5 mol% from the viewpoint of improving the transparency of the resulting molded article (II). More preferably, it is in the range of 7 to 3 mol%. Examples of monovalent ions include ammonium ions, pyridinium ions, sodium ions, potassium ions, and lithium ions, with ammonium ions being preferred.

  The solid content concentration of the solution (U) is preferably in the range of 3% by weight to 20% by weight from the viewpoint of the storage stability of the solution (U) and the coating property of the solution (U) on the base material. It is more preferably in the range of 4% to 15% by weight, and still more preferably in the range of 5% to 12% by weight.

  From the viewpoint of the storage stability of the solution (U) and the gas barrier properties of the obtained molded body (II), the pH of the solution (U) is preferably in the range of 1.0 to 7.0, and is preferably 1.0 to 7.0. More preferably in the range of 6.0, still more preferably in the range of 1.5 to 4.0.

  The pH of the solution (U) can be adjusted by a known method, for example, acidic compounds such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, acetic acid, butyric acid, ammonium sulfate, sodium hydroxide, potassium hydroxide, ammonia, trimethylamine, pyridine, It can adjust by adding basic compounds, such as sodium carbonate and sodium acetate. At this time, if a basic compound that provides a monovalent cation is used in the solution, a part of the carboxyl group and / or carboxylic anhydride group of the carboxylic acid-containing polymer may be neutralized with a monovalent ion. The effect that it can be obtained.

The step (ie) will be described. The state of the solution (U) prepared in the step (id) changes with time, and finally becomes a gel-like composition. The time until the solution (U) becomes gelled depends on the composition of the solution (U). In order to stably apply the solution (U) to the substrate, it is preferable that the solution (U) has a stable viscosity over a long period of time and then gradually increases in viscosity. The solution (U) was measured with a Brookfield viscometer (B-type viscometer: 60 rpm) even after standing at 25 ° C. for 2 days, based on the total amount of the compound (L) component. Is preferably adjusted to be 1 N · s / m ² or less (more preferably 0.5 N · s / m ² or less, particularly preferably 0.2 N · s / m ² or less). The solution (U) has a viscosity of 1 N · s / m ² or less (more preferably 0.1 N · s / m ² or less, particularly preferably 0. It is more preferable to adjust the composition so as to be 05 N · s / m ² or less. The solution (U) has a viscosity of 1 N · s / m ² or less (more preferably 0.1 N · s / m ² or less, particularly preferably 0. More preferably, the composition is adjusted to be 05 N · s / m ² or less. When the viscosity of the solution (U) is in the above range, the storage stability is excellent, and the resulting molded article (II) often has better gas barrier properties.

  In order to adjust the viscosity of the solution (U) to be within the above range, for example, adjusting the concentration of solids, adjusting pH, carboxymethylcellulose, starch, bentonite, tragacanth gum, stearate, alginate, A method of adding a viscosity modifier such as methanol, ethanol, n-propanol, or isopropanol can be used.

  In addition, in order to facilitate the application of the solution (U) to the base material, an organic solvent that can be uniformly mixed with the solution (U) is added so long as the stability of the solution (U) is not hindered. May be. Examples of organic solvents that can be added include alcohols such as methanol, ethanol, n-propanol, and isopropanol; ethers such as tetrahydrofuran, dioxane, and trioxane; ketones such as acetone, methyl ethyl ketone, methyl vinyl ketone, and methyl isopropyl ketone; ethylene glycol, Glycols such as propylene glycol; glycol derivatives such as methyl cellosolve, ethyl cellosolve, n-butyl cellosolve; glycerin; acetonitrile, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, sulfolane, dimethoxyethane and the like.

  In addition, the solution (U) may be carbonate, hydrochloride, nitrate, hydrogen carbonate, sulfate, hydrogen sulfate, phosphate, borate, alumina as long as it does not impair the effects of the present invention. Inorganic acid metal salts such as acid salts; organic acid metal salts such as oxalate, acetate, tartrate and stearate; acetylacetonate metal complexes such as aluminum acetylacetonate; cyclopentadiene such as titanocene Metal complexes such as enyl metal complexes and cyano metal complexes; layered clay compounds, crosslinking agents, compounds containing two or more amino groups as described above (P), compounds containing two or more hydroxyl groups as described above (Q), and other It may contain a polymer compound, a plasticizer, an antioxidant, an ultraviolet absorber, a flame retardant and the like. The solution (U) may contain fine metal oxide powder or fine silica powder.

  The solution (U) prepared in the step (id) is applied to at least one surface of the substrate in the step (ie). Before applying the solution (U), the surface of the substrate may be treated with a known anchor coating agent, or a known adhesive may be applied to the surface of the substrate. The method for applying the solution (U) to the substrate is not particularly limited, and a known method can be used. Preferred methods include, for example, a casting method, a dipping method, a roll coating method, a gravure coating method, a screen printing method, a reverse coating method, a spray coating method, a kiss coating method, a die coating method, a metering bar coating method, and a chamber doctor combined coating method. And curtain coating method.

  After the solution (U) is coated on the substrate in the step (ie), the solvent contained in the solution (U) is removed, whereby the molded body before the ionization step (hereinafter referred to as “molded body (A)”). Is sometimes obtained). The method for removing the solvent is not particularly limited, and a known method can be applied. Specifically, methods such as a hot air drying method, a hot roll contact method, an infrared heating method, and a microwave heating method can be applied alone or in combination. A drying temperature will not be restrict | limited especially if it is 15-20 degreeC or more lower than the flow start temperature of a base material, and 15-20 degreeC or more lower than the thermal decomposition start temperature of a carboxylic acid containing polymer. The removal of the solvent may be carried out under normal pressure or reduced pressure.

  In the molded product (II) of the present invention, it is preferable that a skin layer made of a hydrolyzable condensate of the compound (L) is formed on the surface of the gas barrier layer. Further, as described above, it is not preferable that the skin layer becomes too thick because the transparency of the molded body (II) is lowered. A method for forming a skin layer having an appropriate thickness will be described below. According to the results of intensive studies by the present inventors, the presence or absence of the skin layer and the state of the skin layer formation are determined by the reactivity of the hydrolyzable condensate of the compound (L), the composition of the compound (L), It depends on the solvent used in the solution (U), the drying speed of the solution (U) after the solution (U) is applied to the substrate, and the like. For example, when the contact angle of water with respect to the gas barrier layer surface is measured and the contact angle is smaller than the above-described predetermined range, the reaction time of the step (ia) and the step (ic) is increased. It is possible to increase the contact angle (that is, to form an appropriate skin layer). On the other hand, when the contact angle is larger than the predetermined range, it is possible to reduce the contact angle by shortening the reaction time of the step (ia) and the step (ic).

  By contacting the shaped product (A) obtained by the above-mentioned step by a step (ii) with a solution containing metal ions having a valence of 2 or more (hereinafter sometimes referred to as “solution (IW)”) (ionization step) Then, a molded body after ionization (hereinafter sometimes referred to as “molded body (B)”) is obtained. The ionization process may be performed at any stage as long as the effects of the present invention are not impaired. For example, the ionization step may be performed before or after being processed into the form of the packaging material, or may be performed after the packaging material is filled with the contents and sealed.

  The solution (IW) can be prepared by dissolving, in a solvent, a compound that releases a divalent or higher valent metal ion (polyvalent metal compound) upon dissolution. As a solvent used in preparing the solution (IW), it is desirable to use water, but it may be a mixture of an organic solvent miscible with water and water. Examples of such organic solvents include alcohols such as methanol, ethanol, n-propanol, and isopropanol; ethers such as tetrahydrofuran, dioxane, and trioxane; ketones such as acetone, methyl ethyl ketone, methyl vinyl ketone, and methyl isopropyl ketone; ethylene glycol, propylene glycol Glycols such as methyl cellosolve, ethyl cellosolve, and n-butyl cellosolve; glycerin; organic solvents such as acetonitrile, dimethylformamide, dimethylacetamide, dimethylsulfoxide, sulfolane, and dimethoxyethane.

As the polyvalent metal compound, compounds capable of releasing the metal ions exemplified for the molded article (II) of the present invention (namely, divalent or higher valent metal ions) can be used. For example, calcium acetate, calcium hydroxide, barium hydroxide, calcium chloride, calcium nitrate, calcium carbonate, magnesium acetate, magnesium hydroxide, magnesium chloride, magnesium carbonate, iron (II) acetate, iron (II) chloride, iron acetate ( III), iron chloride (III), zinc acetate, zinc chloride, copper acetate (II), copper acetate (III), lead acetate, mercury acetate (II), barium acetate, zirconium acetate, barium chloride, barium sulfate, nickel sulfate Lead sulfate, zirconium chloride, zirconium nitrate, aluminum sulfate, potassium alum (KAl (SO ₄ ) ₂ ), titanium (IV) sulfate, and the like can be used. Only one type of polyvalent metal compound may be used, or two or more types may be used in combination. Preferred polyvalent metal compounds include calcium acetate, calcium hydroxide, magnesium acetate, and zinc acetate. In addition, you may use these polyvalent metal compounds in the form of a hydrate.

The concentration of the polyvalent metal compound in the solution (IW) is not particularly limited, but is preferably in the range of 5 × 10 ⁻⁴ wt% to 50 wt%, more preferably 1 × 10 ⁻² wt% to 30 wt%. More preferably, it is in the range of 1 to 20% by weight.

  When the molded product (A) is brought into contact with the solution (IW), the temperature of the solution (IW) is not particularly limited, but the higher the temperature, the faster the ionization rate of the carboxyl group-containing polymer. The temperature is, for example, in the range of 30 to 100 ° C, preferably in the range of 40 ° C to 90 ° C, and more preferably in the range of 50 ° C to 85 ° C.

  It is desirable to remove the solvent remaining on the molded body after contacting the molded body (A) with the solution (IW). The method for removing the solvent is not particularly limited, and a known method can be applied. Specifically, drying methods such as a hot air drying method, a hot roll contact method, an infrared heating method, and a microwave heating method can be applied singly or in combination of two or more. The temperature at which the solvent is removed is not particularly limited as long as it is 15 to 20 ° C. or more lower than the flow start temperature of the substrate and 15 to 20 ° C. or lower than the thermal decomposition start temperature of the carboxylic acid-containing polymer. The removal of the solvent may be carried out under normal pressure or reduced pressure.

  In order not to impair the appearance of the surface of the molded body (II), it is preferable to remove excess polyvalent metal compound adhering to the surface of the molded body before or after removing the solvent. As a method for removing the polyvalent metal compound, washing using a solvent in which the polyvalent metal compound dissolves is preferable. As the solvent in which the polyvalent metal compound dissolves, a solvent that can be used for the solution (IW) can be used, and the same solvent as the solvent for the solution (IW) is preferably used.

  The production method of the present invention further includes a step of heat-treating the layer formed in step (i) at a temperature of 50 to 240 ° C. after step (i) and before and / or after step (ii). But you can. That is, you may heat-process with respect to a molded object (A) or (B). The heat treatment may be performed at any stage as long as the removal of the solvent of the coated solution (U) is almost completed, but the molded body before the ionization step (that is, the molded body (A)) is performed. By performing the heat treatment, a molded body (II) having a good surface appearance can be obtained. The temperature of the heat treatment is not particularly limited as long as it is 15 to 20 ° C. or more lower than the flow start temperature of the base material and 15 to 20 ° C. or more lower than the thermal decomposition start temperature of the carboxylic acid-containing polymer. The heat treatment can be performed in air, under a nitrogen atmosphere, under an argon atmosphere, or the like.

  Moreover, in the manufacturing method of this invention, you may irradiate a molded object (A) or (B) with an ultraviolet-ray. The ultraviolet irradiation may be performed any time after the removal of the solvent of the coated solution (U) is almost completed. The method is not particularly limited, and a known method can be applied. The wavelength of the ultraviolet rays to be irradiated is preferably in the range of 170 to 250 nm, more preferably in the range of 170 to 190 nm and / or in the range of 230 to 250 nm. Further, instead of ultraviolet irradiation, radiation such as an electron beam or γ-ray may be irradiated.

  Only one of heat treatment and ultraviolet irradiation may be performed, or both may be used in combination. By performing heat treatment and / or ultraviolet irradiation, the gas barrier performance of the laminate may be expressed to a higher degree.

  In order to dispose the adhesive layer (H) between the base material and the gas barrier layer, a treatment (treatment with an anchor coating agent or application of an adhesive) is performed on the surface of the base material before application of the solution (U). You may give it. In that case, after the step (i) (application of the solution (U)) and before the heat treatment and the step (ii) (ionization step), the substrate coated with the solution (U) is compared. It is preferable to perform an aging treatment that is allowed to stand at a low temperature for a long time. The temperature of the aging treatment is preferably in the range of 30 to 100 ° C, more preferably in the range of 30 to 80 ° C, and further preferably in the range of 30 to 60 ° C. The aging time is preferably in the range of 0.5 to 10 days, more preferably in the range of 1 to 7 days, and still more preferably in the range of 1 to 5 days. By performing such an aging treatment, the adhesive force between the base material and the gas barrier layer becomes stronger. It is preferable that the heat treatment is further performed after the aging treatment.

  The molded article of the present invention is excellent in barrier properties such as gas barrier properties and gasoline barrier properties. The molded article of the present invention is preferably used for molded articles that come into contact with liquids such as beverages, seasonings, detergents, medical liquids, automotive liquids, and industrial liquids. The molded article of the present invention is particularly preferably used as a bottle for food such as beverages and seasonings, a gasoline tank for automobiles, and a member around the gasoline tank.

  Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In the following examples, when describing the layer structure of the molded body, only the substance name may be described, and the “layer” may be omitted.

[Production and Evaluation of Molded Body]
The molded body described below was produced and evaluated. Evaluation was performed by the following methods (1) to (6).

(1) Measurement of oxygen permeability After filling water into PET bottles (volume 500 mL, surface area 0.041 m ² , weight 35 g) of Examples 1 to 16 and Comparative Examples 1 to 7, the caps were closed and relative at 20 ° C. The bottle was stored for one month in an atmosphere with a humidity of 65% RH, and the bottle was conditioned. One month later, water was extracted from the bottle, and the oxygen permeability was measured by the following method.

  First, set a metal jig to which two metal pipes for carrier gas are connected to the mouth of the bottle, and use an epoxy adhesive to prevent gas from leaking from the gap between the metal jig and the bottle. The jig was fixed to the bottle mouth. Next, the opposite end of the metal pipe was connected to an oxygen permeation amount measuring device ("MOCON OX-TRAN 2/20" manufactured by Modern Control). That is, the carrier gas is released from one of the metal pipes into the PET bottle, passes through the bottle, and then flows from the other metal pipe into the oxygen gas sensor of the oxygen transmission amount measuring device.

  Subsequently, the bottle around which the metal pipe was attached was covered with a bag, and the bag was fixed to two metal pipes with a string. The bag was produced by heat-sealing a laminated film having a laminated structure of polyester layer / adhesive layer / EVOH layer / adhesive layer / PO layer. Next, the airtightness was improved by filling the gap between the bag and the metal pipe with an epoxy resin. Next, a hole is made in one place of the bag, a pipe for supplying gas is put in the hole, and the bag and the pipe are fixed using adhesive tape so that outside air does not flow in between the bag and the pipe. did.

  Subsequently, nitrogen gas containing 2% by volume of hydrogen gas was allowed to flow as a carrier gas through the pipe and metal pipe into the bag and bottle. Part of the gas that flows into the bag passes through the bottle and flows into the bottle, the other part passes through the bag and flows out, and the other part is connected at two locations. Leaked from the outside. The oxygen gas contained in the carrier gas was carried to the sensor unit by the carrier gas, and the oxygen concentration was measured. The carrier gas was kept flowing in the bag and the PET bottle until the oxygen concentration reached a constant value. The oxygen concentration at the time when the oxygen concentration became constant was set as the zero point of oxygen permeability.

Thereafter, the carrier gas flowing in the bag was switched to a conditioned oxygen gas. That is, nitrogen gas flowed inside the PET bottle and oxygen gas flowed outside the PET bottle. The oxygen gas permeated from the outside to the inside of the PET bottle was carried to the oxygen gas sensor by the carrier gas flowing inside the pouch, and the oxygen concentration was measured. From the oxygen concentration measured at this time, the oxygen permeability (unit: cm ³ / (bottle · day · atm)) was calculated.

  The measurement was performed under the conditions of a temperature of 20 ° C., a humidity of 65% RH, an oxygen pressure of 1 atm, and a carrier gas pressure of 1 atm. As the carrier gas, nitrogen gas containing 2% by volume of hydrogen gas was used.

(2) Oxygen permeability after bending test After filling the PET bottles (volume 500 mL, surface area 0.041 m ² , weight 35 g) of Examples 1 to 16 and Comparative Examples 1 to 7 with a height of 1.5 m Was dropped 5 times. In this way, a bending test for bending the PET bottle was performed. Subsequently, water was extracted from the bottle after the bending test. About the oxygen permeability of the bottle after the bending test thus obtained, the oxygen permeability was measured by the same method and conditions as in the above measurement.

(3) Gasoline barrier property The bottoms of the multilayer containers of Examples 17 to 32 and Comparative Examples 8 to 14 were cut out, and the bottoms were mouths of aluminum cups (diameter 6 cm, depth 2.5 cm) containing 20 mL of model gasoline. The sample for a measurement was obtained by attaching to. For model gasoline, a mixture of toluene (45 wt%), isooctane (45 wt%), and ethanol (10 wt%) was used.

  After the initial weight measurement was performed on the sample, the sample was stored in an explosion-proof thermostatic chamber (40 ° C./65% RH) for 14 days and then weighed again. Six samples were measured for each of the examples and comparative examples, and the average value of weight loss was determined. The average value of the weight reduction obtained was defined as the amount of gasoline permeated.

(4) Gasoline barrier property after bending test A bending test was performed in which the multilayer containers of Examples 17 to 32 and Comparative Examples 8 to 14 were bent by dropping 5 times from a height of 1.5 m. With respect to the multilayer container after bending thus obtained, the amount of gasoline permeated was determined by the same method and conditions as those described above.

(5) Degree of neutralization of carboxyl groups with metal ions (degree of ionization)
[Creation of calibration curve (I) by FT-IR]
Polyacrylic acid having a number average molecular weight of 150,000 was dissolved in distilled water, and the carboxyl group was neutralized with a predetermined amount of sodium hydroxide. The obtained aqueous solution of the neutralized polyacrylic acid was coated on the substrate so as to have the same thickness as the gas barrier layer of the molded article to be measured for the degree of ionization, and dried. The substrate was coated on the surface with a two-component anchor coating agent (Mitsui Takeda Chemical Co., Ltd., Takelac 626 (trade name) and Takenate A50 (trade name), hereinafter abbreviated as “AC”). A stretched polyamide film (manufactured by Unitika Ltd., Emblem ON-BC (trade name), thickness 15 μm, hereinafter sometimes abbreviated as “OPA”) was used. In this way, a standard sample [laminated body (layer made of neutralized polyacrylic acid / AC / OPA)] having a carboxyl group neutralization degree of 0, 25, 50, 75, 80, and 90 mol% was prepared. Produced. About these samples, the infrared absorption spectrum was measured in the mode of ATR (total reflection measurement) using the Fourier-transform infrared spectrophotometer (The product made from Perkin Elmer, Spectrum One). The two peaks corresponding to the C = O stretching vibration in the layer consisting of neutralized product of polyacrylic acid, i.e., a peak observed in the range of 1600cm ^-1 ~1850cm ^-1 and 1500cm ^-1 ~1600cm ^- The ratio of the maximum absorbance was calculated for the peak observed in the range of ¹ . A calibration curve (I) was created using the calculated ratio and the ionization degree of each standard sample.

A laminate using a stretched polyamide film (OPA) as a base material is included in the gas barrier layer in a mode of ATR (total reflection measurement) using a Fourier transform infrared spectrophotometer (manufactured by Perkin Elmer, Spectrum One). The peak of C = O stretching vibration was observed. Peak attributed to C = O stretching vibration of the carboxyl group of the ionization front of a carboxylic acid-containing polymer, was observed in the range of 1600cm ^-1 ~1850cm ^-1. Furthermore, C = O stretching vibration of the carboxyl group after being ionized was observed in the range of 1500cm ^-1 ~1600cm ^-1. Then, the ratio was calculated from the maximum absorbance in each range, and the degree of ionization was determined using the ratio and the calibration curve 1.

[Preparation of calibration curve 2 by fluorescent X-ray]
About the laminated body which used OPA mentioned above as a base material, the standard sample from which the degree of ionization differs was measured from the measurement of FT-IR. Specifically, eleven types of standard samples having different degrees of ionization (ions: calcium ions) of about 10 mol% between 0 to 100 mol% were prepared. For each sample, the fluorescence X-ray intensity of calcium element was measured using a wavelength dispersion type fluorescent X-ray apparatus (manufactured by Rigaku Corporation, ZSXmini II), and a calibration curve 2 was created from the degree of ionization measured in advance by FT-IR. did.

[Measurement of ionization degree by fluorescent X-ray]
Using the calibration curve 2 obtained, the ionicity of the carboxyl group in the gas barrier layer due to calcium ions was calculated.

(6) Weight of hydrolysis condensate and polymer (X) By the above-described method, the weight of the inorganic component derived from compound (L) and the weight of the organic component derived from compound (L) and polymer (X ) And the total weight of the organic components derived from it were calculated.

  Below, it shows about the preparation method of the liquid mixture (U) used for preparation of the molded object of an Example and a comparative example.

<Mixed liquid (U1)>
Polyacrylic acid (PAA) having a number average molecular weight of 150,000 was dissolved in distilled water to obtain a PAA aqueous solution having a solid content concentration of 13% by weight in the aqueous solution. Subsequently, 13% ammonia aqueous solution was added to this PAA aqueous solution to neutralize 1 mol% of the carboxyl group of PAA, thereby obtaining a partially neutralized aqueous solution of PAA.

  Also, 60 parts by weight of acetic acid and 1800 parts by weight of distilled water were mixed, and 204 parts by weight of aluminum isopropoxide (AIP) (AIP / acetic acid / distilled water = 1/1/100 (molar ratio)) was stirred into this acetic acid aqueous solution. And then heated at 80 ° C. for 1 hour to obtain an AIP aqueous solution (S1) having a concentration of 9.88 wt%.

  Subsequently, the molar ratio of Al / Si was 1.2 / 98.8, and the weight ratio of [inorganic component derived from tetramethoxysilane (TMOS) and AIP] / [partially neutralized product of PAA] was 30.2 / A mixed solution (U1) was prepared so as to be 69.8. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 8.5 parts by weight of a 9.88% by weight AIP aqueous solution (S1) was added thereto. Subsequently, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalents, and hydrolysis and condensation reactions were carried out at 10 ° C. for 5 hours. And a liquid mixture (T1) was obtained. After diluting this mixed liquid (T1) with 567 parts by weight of distilled water and 283 parts by weight of methanol, 354 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring, A liquid mixture (U1) having a concentration of 5% by weight was obtained.

<Mixed liquid (U2)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). And the liquid mixture (U2) was prepared by the preparation ratio similar to liquid mixture (U1) except having made it the molar ratio of Al / Si becoming 1.9 / 98.1. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 13.2 parts by weight of the 9.88 wt% AIP aqueous solution (S2) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T2) was obtained. Next, a mixed solution (U2) having a solid content concentration of 5% by weight was prepared in the same manner as in the preparation of the mixed solution (U1) except that the mixed solution (T2) was used instead of the mixed solution (T1). )

<Mixed liquid (U3)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). And the liquid mixture (U3) was prepared by the preparation ratio similar to a liquid mixture (U1) except having made it the molar ratio of Al / Si becoming 2.8 / 97.2. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 19.8 parts by weight of a 9.88 wt% AIP aqueous solution (S3) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T3) was obtained. Next, a mixed liquid (U3) having a solid content concentration of 5% by weight was prepared in the same manner as in the preparation of the mixed liquid (U1) except that the mixed liquid (T3) was used instead of the mixed liquid (T1). )

<Mixed liquid (U4)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 30.1 / 69.9, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 25.5 / 74.5. A mixed solution (U4) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 293 parts by weight of a 9.88 wt% AIP aqueous solution (S4) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T4) was obtained. Subsequently, after diluting the obtained mixed liquid (T4) with 850 parts by weight of distilled water and 405 parts by weight of methanol, 607 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. As a result, a mixed liquid (U4) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U5)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 0.1 / 99.9, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 80.0 / 20.0. A mixed solution (U5) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 0.7 part by weight of a 9.88 wt% AIP aqueous solution (S5) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T5) was obtained. Subsequently, after the mixed liquid (T5) was diluted with 212 parts by weight of distilled water and 131 parts by weight of methanol, 38 parts by weight of an aqueous solution of PAA partially neutralized (concentration 13% by weight) was rapidly added while stirring. A mixed solution (U5) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U6)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 3.0 / 97.0, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 20.0 / 80.0. A mixed solution (U6) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 20.8 parts by weight of a 9.88 wt% AIP aqueous solution (S6) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T6) was obtained. Subsequently, after the mixture (T6) was diluted with 868 parts by weight of distilled water and 412 parts by weight of methanol, 623 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U6) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U7)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 3.0 / 97.0, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 80.0 / 20.0. A mixed solution (U7) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 21.0 parts by weight of a 9.88 wt% AIP aqueous solution (S7) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T7) was obtained. Subsequently, after the mixture (T7) was diluted with 214 parts by weight of distilled water and 132 parts by weight of methanol, 39 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U7) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U8)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 3.0 / 97.0, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 70.0 / 30.0. A mixed liquid (U8) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 21.1 parts by weight of a 9.88 wt% AIP aqueous solution (S8) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T8) was obtained. Subsequently, after the mixed liquid (T8) was diluted with 245 parts by weight of distilled water and 145 parts by weight of methanol, 67 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U8) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U9)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 2.9 / 97.1, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 10.28 / 89.8. A mixed liquid (U9) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 20.3 parts by weight of a 9.88 wt% AIP aqueous solution (S9) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T9) was obtained. Subsequently, after the liquid mixture (T9) was diluted with 1700 parts by weight of distilled water and 769 parts by weight of methanol, 1366 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U9) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U10)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). The molar ratio of Al / Si is 3.0 / 97.0, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 90.2 / 9.8. A mixed solution (U10) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 21.3 parts by weight of a 9.88 wt% AIP aqueous solution (S10) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T10) was obtained. Subsequently, after the mixture (T10) was diluted with 189 parts by weight of distilled water and 121 parts by weight of methanol, 17 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U10) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U11)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, the molar ratio of TMOS / γ-glycidoxydoxypropyltrimethoxysilane (GPTMOS) was 99.5 / 0.5, the molar ratio of Al / Si was 2.8 / 97.2, [TMOS, AIP and A mixed solution (U11) was prepared so that the weight ratio of [inorganic component derived from GPTMOS] / [partially neutralized product of organic component of GPTMOS and PAA] was 30.5 / 69.5. Specifically, first, 49.6 parts by weight of TMOS and 0.4 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 19.6 parts by weight of a 9.88 wt% AIP aqueous solution (S11) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalent, and the mixture was hydrolyzed at 10 ° C. for 5 hours. Decomposition | disassembly and condensation reaction were performed and the liquid mixture (T11) was obtained. Subsequently, after diluting the mixed solution (T11) with 566 parts by weight of distilled water and 283 parts by weight of methanol, 352 parts by weight of an aqueous solution of a partially neutralized product of PAA (concentration 13% by weight) was rapidly added while stirring. As a result, a mixed solution (U11) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U12)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, the charging ratio was the same as that of the mixed liquid (U11) except that the molar ratio of TMOS / GPTMOS was 80.0 / 20.0 and the molar ratio of Al / Si was 3.1 / 96.9. A liquid mixture (U12) was obtained. Specifically, first, 36.0 parts by weight of TMOS and 14.0 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 19.8 parts by weight of a 9.88% by weight AIP aqueous solution (S12) was added thereto. Further, 3.0 parts by weight of distilled water and 7.4 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalents, and water was added at 10 ° C. for 5 hours. Decomposition | disassembly and condensation reaction were performed and the liquid mixture (T12) was obtained. Subsequently, after the mixed liquid (T12) was diluted with 520 parts by weight of distilled water and 302 parts by weight of methanol, 267 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U12) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U13)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, the molar ratio of TMOS / GPTMOS is 89.9 / 10.1, the molar ratio of Al / Si is 3.1 / 96.9, [inorganic components derived from TMOS, AIP and GPTMOS] / [organic of GPTMOS] The mixed solution (U13) was prepared so that the weight ratio of the component and the partially neutralized product of PAA was 31.5 / 68.5. Specifically, first, 42.6 parts by weight of TMOS and 7.4 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 20.6 parts by weight of a 9.88 wt% AIP aqueous solution (S13) was added thereto. Further, 3.2 parts by weight of distilled water and 7.8 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalents, and water was added at 10 ° C. for 5 hours. Decomposition and condensation reaction were performed to obtain a mixed solution (T13). Subsequently, after the mixed liquid (T13) was diluted with 542 parts by weight of distilled water and 302 parts by weight of methanol, 293 parts by weight of an aqueous solution of PAA partially neutralized (concentration 13% by weight) was rapidly added while stirring. A mixed solution (U13) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U14)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, a mixed liquid (U14) was obtained with the same charging ratio as the mixed liquid (U11) except that the molar ratio of TMOS to GPTMOS was 98.0 / 2.0. Specifically, first, 48.5 parts by weight of TMOS and 1.5 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 19.2 parts by weight of a 9.88% by weight AIP aqueous solution (S14) was added thereto. Further, 3.3 parts by weight of distilled water and 8.1 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalent, and the mixture was hydrolyzed at 10 ° C. for 5 hours. Decomposition | disassembly and condensation reaction were performed and the liquid mixture (T14) was obtained. Subsequently, after the mixture (T14) was diluted with 562 parts by weight of distilled water and 285 parts by weight of methanol, 345 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. This was added to obtain a mixed solution (U14) having a solid content concentration of 5% by weight.

<Mixed liquid (U15)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, a mixed liquid (U15) was obtained with the same charging ratio as the mixed liquid (U11) except that the molar ratio of TMOS / GPTMOS was 99.9 / 0.1. Specifically, first, 49.9 parts by weight of TMOS and 0.1 part by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 21.0 parts by weight of a 9.88% by weight AIP aqueous solution (S15) was added thereto. Further, 3.3 parts by weight of distilled water and 8.1 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalent, and the mixture was hydrolyzed at 10 ° C. for 5 hours. Decomposition | disassembly and condensation reaction were performed and the liquid mixture (T15) was obtained. Subsequently, after diluting the mixed solution (T15) with 567 parts by weight of distilled water and 283 parts by weight of methanol, 354 parts by weight of an aqueous solution of a partially neutralized product of PAA (concentration 13% by weight) was rapidly added while stirring. A mixed solution (U22) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U16)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, a mixed liquid (U16) was obtained at the same charging ratio as the mixed liquid (U11) except that the molar ratio of TMOS / GPTMOS was 70.0 / 30.0. Specifically, first, 30.0 parts by weight of TMOS and 20.0 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol, and 17.9 parts by weight of a 9.88% by weight AIP aqueous solution (S16) was added thereto. Further, 2.9 parts by weight of distilled water and 7.0 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalent, and hydrolysis was carried out at 10 ° C. for 5 hours. Then, a condensation reaction was performed to obtain a mixed solution (T16). Subsequently, after the mixed liquid (T16) was diluted with 500 parts by weight of distilled water and 310 parts by weight of methanol, 229 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U16) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U17)>
The molar ratio of TMOS / GPTMOS is 89.9 / 10.1, and the weight ratio of [inorganic component derived from TMOS and GPTMOS] / [partial neutralized product of organic component of GPTMOS and PAA] is 31.5 / 68.5. A mixed solution (T17) was prepared so that Specifically, first, 46 parts by weight of TMOS and 8 parts by weight of GPTMOS were dissolved in 50 parts by weight of methanol. To this was added 3.2 parts by weight of distilled water and 7.8 parts by weight of 0.1N hydrochloric acid so that the ratio of water to the total of TMOS and GPTMOS was 1.95 molar equivalent and the pH was 2 or less. The mixture was subjected to hydrolysis and condensation reaction for 5 hours to obtain a mixed solution (T17).

  Subsequently, a partially neutralized aqueous solution of PAA was prepared in the same manner as in the preparation of the mixed solution (U1). Next, after diluting the mixed solution (T17) with 61 parts by weight of distilled water, 308 parts by weight of a partially neutralized aqueous solution of PAA (concentration: 13% by weight) was rapidly added while stirring to obtain a solid content concentration of 13% by weight. Liquid mixture (U17) was obtained.

<Mixed liquid (U18)>
A mixed liquid (U18) was obtained in the same manner as the mixed liquid (U17) except that the solid content concentration was changed to 5% by weight. First, after the liquid mixture (T18) prepared by the same composition and method as the liquid mixture (T17) was diluted with 542 parts by weight of distilled water and 293 parts by weight of methanol, the aqueous solution (concentration) of the partially neutralized product of PAA was stirred. 13 wt%) 308 parts by weight were quickly added to obtain a liquid mixture (U18) having a solid content concentration of 5 wt%.

<Mixed liquid (U19)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, a mixed liquid (U19) was prepared so that the weight ratio of [inorganic component derived from AIP] / [partial neutralized product of PAA] was 1.0 / 99.0 without adding TMOS and GPTMOS. did. Specifically, 100 parts by weight of a partially neutralized aqueous solution of PAA (concentration of 5% by weight) is quickly added to 2.1 parts by weight of the 9.88% by weight AIP aqueous solution (S19), and the mixed solution (U19) is added. Obtained.

<Mixed liquid (U20)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, the molar ratio of Al / Si is 40.4 / 59.6, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 40.3 / 59.7. Thus, a mixed solution (U20) was prepared. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 461 parts by weight of a 9.88 wt% AIP aqueous solution (S20) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T20) was obtained. Subsequently, after the mixture (T20) was diluted with 567 parts by weight of distilled water and 283 parts by weight of methanol, 354 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A liquid mixture (U20) having a solid content concentration of 5% by weight was obtained.

<Mixed liquid (U21)>
A partially neutralized aqueous solution of PAA and an AIP aqueous solution were prepared in the same manner as in the preparation of the mixed solution (U1). Subsequently, the molar ratio of Al / Si is 0.06 / 99.94, and the weight ratio of [inorganic component derived from TMOS and AIP] / [partially neutralized product of PAA] is 70.0 / 30.0. A mixed solution (U21) was prepared as described above. Specifically, first, 50 parts by weight of TMOS was dissolved in 50 parts by weight of methanol, and 0.4 part by weight of a 9.88 wt% AIP aqueous solution (S21) was added thereto. Further, 3.3 parts by weight of distilled water and 8.2 parts by weight of 0.1N hydrochloric acid were added so that the ratio of water to TMOS was 1.95 molar equivalent, and hydrolysis and condensation reaction was performed at 10 ° C. for 5 hours. And a liquid mixture (T21) was obtained. Subsequently, after the mixed liquid (T21) was diluted with 243 parts by weight of distilled water and 144 parts by weight of methanol, 65 parts by weight of a partially neutralized aqueous solution of PAA (concentration 13% by weight) was rapidly added while stirring. A mixed solution (U21) having a partial concentration of 5% by weight was obtained.
[Method for producing molded body]
A method for producing the molded body of the example (molded body (II)) and the molded body of the comparative example will be described below.

<Examples 1 to 16>
As the molded body (I), a PET bottle (volume 500 mL, surface area 0.041 m ² , weight 35 g) was prepared. Plasma treatment was performed on the surface of the PET bottle. Next, on the surface after the plasma treatment, a two-part anchor coating agent (AC: manufactured by Mitsui Takeda Chemical Co., Ltd .: Takelac A-626 (trade name) 1 part by weight and Takenate A-50 (trade name) 2 parts by weight Of ethyl acetate solution) was applied by a dipping method. Next, an anchor coat layer (AC layer) having a thickness of about 0.1 μm was provided by drying at 50 ° C. for 3 minutes.

  Next, the liquid mixture (U1) is applied to the surface of the anchor coat layer by a dipping method, and after the excess liquid is dropped until the coated surface becomes uniform, the molded body is dried at 60 ° C. for 10 minutes. (A) was obtained. The obtained molded body (A) was aged at 40 ° C. for 3 days. Thereafter, the compact (A) was heat-treated at 60 ° C. for 7 days using a dryer. Next, the molded body (A) was immersed in a 2 wt% aqueous calcium acetate solution (60 ° C.) for 30 seconds, and then dried at 50 ° C. for 5 minutes. Thus, the molded article of Example 1 having a structure of gas barrier layer (0.4 μm) / AC layer (0.1 μm) / PET bottle / AC layer (0.1 μm) / gas barrier layer (0.4 μm). Got.

  A gas barrier layer (thickness 0.4 μm) / AC layer (thickness 0.1 μm) in the same manner as in Example 1 except that the mixed liquids (U2) to (U16) are used instead of the mixed liquid (U1). The molded bodies of Examples 2 to 16 having a structure of / PET bottle / AC layer (thickness 0.1 μm) / gas barrier layer (thickness 0.4 μm) were obtained.

  When the thickness of the gas barrier layer did not reach the target thickness, the concentration of the mixed solution (U) was adjusted using a mixed solvent having a methanol / water ratio of 3/7, and coating was performed again. .

<Comparative Example 1>
The PET bottle used as the molded body (I) in Examples 1 to 16 was evaluated as the molded body of Comparative Example 1.

<Comparative Examples 2-6>
A gas barrier layer (1.0 μm) / AC layer (0.1 μm) / PET bottle / AC layer (0) in the same manner as in Example 1 except that the mixed solution (U17) is used instead of the mixed solution (U1). .1 μm) / gas barrier layer (1.0 μm), a molded article of Comparative Example 2 was obtained. Since the concentration of the mixed liquid (U17) was high, the gas barrier layer was thicker than that of the example.

  Gas barrier layer (0.4 μm) / AC layer (0.1 μm) / PET bottle / In the same manner as in Example 1 except that the mixed liquids (U18) to (U21) are used instead of the mixed liquid (U1). The molded bodies of Comparative Examples 3 to 6 having a structure of AC layer (0.1 μm) / gas barrier layer (0.4 μm) were obtained.

  When the thickness of the gas barrier layer did not reach the target thickness, the concentration of the mixed solution (U) was adjusted using a mixed solvent having a methanol / water ratio of 3/7, and coating was performed again. .

<Comparative Example 7>
In the same manner as in Example 1, the mixed solution (U14) was applied to the surface of the PET bottle. However, no subsequent heat treatment and ionization were performed. In this way, the molded article of Comparative Example 7 having a structure of gas barrier layer (0.4 μm) / AC layer (0.1 μm) / PET bottle / AC layer (0.1 μm) / gas barrier layer (0.4 μm). Got.

  Table 1 shows the production conditions of the molded bodies of Examples 1 to 16 and the molded bodies of Comparative Examples 1 to 7. In addition, Table 1 shows the degree of neutralization and oxygen permeability before and after the bending test.

  As shown in Table 1, the molded articles of Examples exhibited good oxygen barrier properties before and after the bending test.

As shown in Examples and Comparative Examples, the ratio of [number of moles of M ¹ atom derived from compound (A)] / [number of moles of Si atom derived from compound (B)] was 0.1 / 99. When it was in the range of 9 to 35.0 / 65.0, a molded article having excellent oxygen barrier properties before and after the bending test was obtained. This ratio is preferably in the range of 1.2 / 98.8 to 30.0 / 70.0, and preferably in the range of 1.9 / 98.1 to 30.0 / 70.0. More preferably, it is in the range of 2.8 / 97.2 to 30.0 / 70.0.

  Further, as shown in Examples and Comparative Examples, at least part of the —COO— group contained in the functional group of the polymer (X) is neutralized with a divalent or higher metal ion, which is favorable. A molded product exhibiting oxygen barrier properties was obtained.

  As shown in the Examples, [weight of inorganic component derived from compound (L)] / [total weight of organic component derived from compound (L) and weight of organic component derived from polymer (X) ] Is preferably in the range of 20.0 / 80.0 to 80.0 / 20.0, and more preferably in the range of 30.5 / 69.5 to 70/30.

  As shown in the examples, in order to obtain an excellent oxygen barrier property, [the number of moles of Si atoms derived from the compound represented by the formula (II)] / [the compound represented by the formula (III) The number of moles of Si atoms derived] is preferably in the range of 99.5 / 0.5 to 80/20, and is preferably in the range of 98.0 / 2.0 to 89.9 / 10.1. It is more preferable.

  The molded body of Comparative Example 2 had a relatively good oxygen barrier property. However, this is because the total gas barrier layer of Comparative Example 2 is as thick as 2 μm. In Comparative Example 2 where the gas barrier layer was thick, the durability of the gas barrier layer against bending was low, and the oxygen barrier property was greatly reduced by the bending test. On the other hand, in Comparative Examples 3 to 7 in which the thickness of the gas barrier layer was the same as that of the example, the oxygen barrier property was low.

<Examples 17 to 32>
First, a multilayer container was produced as the molded body (I). Specifically, five layers of inner HDPE layer (thickness 435 μm) / AD layer (thickness 50 μm) / EVOH layer (thickness 50 μm) / AD layer (thickness 50 μm) / outer HDPE layer (thickness 1890 μm) A multilayer container (internal volume 50 cm ³ ) having a structure was prepared by coextrusion blow molding. EVOH having an ethylene content of 32 mol%, a saponification degree of 99.6%, and MI = 3.0 g / 10 min (190 ° C., 2169 g weighted) was used. As the high density polyethylene (HDPE), “HZ8200B” (MI = 0.01 g / 10 min (190 ° C., 2160 g load), density 0.96 g / cm ³ ) manufactured by Mitsui Petrochemical Co., Ltd. was used. As the adhesive resin layer (AD layer), “Admer GT4” (maleic anhydride-modified polyethylene, MI = 0.2 g / 10 min (190 ° C., 2160 g load)) manufactured by Mitsui Petrochemical Co., Ltd. was used.

  Next, plasma treatment was performed on the surface of the multilayer container. Next, on the surface after the plasma treatment, a two-part anchor coating agent (AC: manufactured by Mitsui Takeda Chemical Co., Ltd .: Takelac A-626 (trade name) 1 part by weight and Takenate A-50 (trade name) 2 parts by weight Of ethyl acetate solution) was applied by a dipping method. Next, the multilayer container was dried at 50 ° C. for 3 minutes to provide an anchor coat layer (AC layer) having a thickness of about 0.1 μm. Next, the mixture (U1) was applied to the surface of the AC layer by an immersion method, and then dried at 60 ° C. for 10 minutes to obtain a molded body (A). Next, the molded body (A) was aged at 40 ° C. for 3 days. Next, the molded body (A) was subjected to heat treatment at 60 ° C. for 7 days using a dryer. Next, the molded body (A) was immersed in a 2 wt% aqueous calcium acetate solution (60 ° C.) for 30 seconds, and then dried at 50 ° C. for 5 minutes. In this way, a structure of gas barrier layer (thickness 0.4 μm) / AC layer (thickness 0.1 μm) / multilayer container / AC layer (thickness 0.1 μm) / gas barrier layer (thickness 0.4 μm). A molded article of Example 17 having

  Gas barrier layer (thickness 0.4 μm) / AC layer (thickness 0.1 μm) in the same manner as in Example 17 except that the mixed liquids (U2) to (U16) are used instead of the mixed liquid (U1). The molded bodies of Examples 18 to 32 having the following structures were obtained: / multilayer container / AC layer (thickness 0.1 μm) / gas barrier layer (thickness 0.4 μm).

  When the thickness of the gas barrier layer did not reach the target thickness, the concentration of the mixed solution (U) was adjusted using a mixed solvent having a methanol / water ratio of 3/7, and coating was performed again. .

<Comparative Example 8>
The multilayer container used as the molded body (I) in Examples 17 to 32 was evaluated as the molded body of Comparative Example 8.

<Comparative Examples 9-13>
Gas barrier layer (thickness: 1.0 μm) / AC layer (thickness: 0.1 μm) / multilayer container / like Example 17 except that the mixed liquid (U17) is used instead of the mixed liquid (U1) A molded body of Comparative Example 9 having a structure of AC layer (thickness 0.1 μm) / gas barrier layer (thickness 1.0 μm) was obtained. Since the concentration of the mixed liquid (U17) was high, the gas barrier layer was thicker than that of the example.

  Gas barrier layer (thickness 0.4 μm) / AC layer (thickness 0.1 μm) in the same manner as in Example 17 except that the mixed liquids (U18) to (U21) are used instead of the mixed liquid (U1). The molded bodies of Comparative Examples 10 to 13 having a structure of: / multilayer container / AC layer (thickness 0.1 μm) / gas barrier layer (thickness 0.4 μm) were obtained.

  When the thickness of the gas barrier layer did not reach the target thickness, the concentration of the mixed solution (U) was adjusted using a mixed solvent having a methanol / water ratio of 3/7, and coating was performed again. .

<Comparative example 14>
In the same manner as in Example 17, the mixed solution (U14) was applied to the surface of HDPE (thickness: 1000 μm). However, no subsequent heat treatment and ionization were performed. In this way, a structure of gas barrier layer (thickness 0.4 μm) / AC layer (thickness 0.1 μm) / multilayer container / AC layer (thickness 0.1 μm) / gas barrier layer (thickness 0.4 μm). A molded article of Comparative Example 14 having

  When the thickness of the gas barrier layer did not reach the target thickness, the concentration of the mixed solution (U) was adjusted using a mixed solvent having a methanol / water ratio of 3/7, and coating was performed again. .

  Table 1 shows the production conditions of the molded bodies of Examples 17 to 32 and the molded bodies of Comparative Examples 8 to 14. Further, Table 2 shows the degree of neutralization and the gasoline permeation amount before and after the bending test of these molded products.

  As shown in Table 2, the molded articles of Examples exhibited good gasoline barrier properties before and after the bending test.

As shown in Examples and Comparative Examples, the ratio of [number of moles of M ¹ atom derived from compound (A)] / [number of moles of Si atom derived from compound (B)] was 0.1 / 99. When it was in the range of 9 to 35.0 / 65.0, a molded article (II) having excellent gasoline barrier properties before and after the bending test was obtained. This ratio is preferably in the range of 1.2 / 98.8 to 30.0 / 70.0, and preferably in the range of 1.9 / 98.1 to 30.0 / 70.0. More preferably, it is in the range of 2.8 / 97.2 to 30.0 / 70.0.

  Further, as shown in Examples and Comparative Examples, at least part of the —COO— group contained in the functional group of the polymer (X) is neutralized with a divalent or higher metal ion, which is favorable. A molded article showing gasoline barrier properties was obtained.

  As shown in the Examples, [weight of inorganic component derived from compound (L)] / [total weight of organic component derived from compound (L) and weight of organic component derived from polymer (X) ] Is preferably in the range of 20.0 / 80.0 to 80.0 / 20.0, and more preferably in the range of 30.5 / 69.5 to 70/30.

  As shown in the examples, in order to obtain excellent gasoline barrier properties, [number of moles of Si atoms derived from the compound represented by formula (II)] / [derived from the compound represented by formula (III) The number of moles of Si atoms] is preferably in the range of 99.5 / 0.5 to 80/20, and in the range of 98.0 / 2.0 to 89.9 / 10.1. Is more preferable.

  The molded article of Comparative Example 9 had relatively good gasoline barrier properties. However, this is because the total gas barrier layer of Comparative Example 9 is as thick as 2 μm. In Comparative Example 9 where the gas barrier layer was thick, the durability of the gas barrier layer against bending was low, and the gasoline barrier property was greatly reduced by the bending test. On the other hand, in Comparative Examples 10 to 14 in which the thickness of the gas barrier layer was the same as that of the example, the gasoline barrier property was low.

  As described above, the molded product (II) of the present invention using a predetermined gas barrier layer exhibited excellent characteristics.

  The present invention can be used for a molded body. The molded article of the present invention is excellent in barrier properties such as oxygen barrier properties and gasoline barrier properties. Therefore, the molded article of the present invention can be preferably used as a molded article that comes into contact with beverages, seasonings, detergents, medical liquids, automotive liquids, industrial liquids, and the like.

Claims (7)

A container comprising a molded body comprising a molded substrate and at least one layer having gas barrier properties laminated on the substrate,
The layer having gas barrier property includes a hydrolysis condensate of at least one compound (L) containing a hydrolyzable characteristic group, and at least one functional group selected from a carboxyl group and a carboxylic anhydride group. Comprising a neutralized product of the polymer (X) contained,
The compound (L) includes a compound (A) and a compound (B) containing Si to which a hydrolyzable characteristic group is bonded,
The compound (A) is at least one compound represented by the following formula (I):
M ¹ X ¹ _m Y ¹ _nm (I)
[In Formula (I), M ¹ represents any one selected from Al, Ti, and Zr. X ¹ represents any one selected from F, Cl, Br, I, OR ¹ , R ² COO, R ³ COCHCOR ⁴ , and NO ₃ . Y ¹ represents any one selected from F, Cl, Br, I, OR ⁵ , R ⁶ COO, R ⁷ COCHCOR ⁸ , NO ₃ and R ⁹ . R ¹ , R ² , R ⁵ and R ⁶ each independently represents a hydrogen atom or an alkyl group. R ³ , R ⁴ , R ⁷ , R ⁸ and R ⁹ each independently represents an alkyl group. n is equal to the valence of M ¹ . m represents an integer of 1 to n. ]
The compound (B) includes at least one compound represented by the following formula (II):
Si (OR ¹⁰ ) _p R ¹¹ _4-pq X ² _q (II)
[In the formula (II), R ¹⁰ represents an alkyl group. R ¹¹ represents an alkyl group, an aralkyl group, an aryl group or an alkenyl group. X ² represents a halogen atom. p and q represent the integer of 0-4 each independently. 1 ≦ p + q ≦ 4. ]
At least a part of —COO— group contained in the functional group of the polymer (X) is neutralized with a divalent or higher metal ion,
The proportion of the compound represented by the formula (II) in the compound (B) is 80 mol% or more,
In the composition, a ratio of [number of moles of the M ¹ atom derived from the compound (A)] / [number of moles of Si atom derived from the compound (B)] is 0.1 / 99.9 to 35. A container made of a molded product in a range of 0.0 / 65.0. The compound (B) further includes at least one compound represented by the following formula (III):
Si (OR ¹² ) _r X ³ _s Z ³ _4-rs (III)
[In the formula (III), R ¹² represents an alkyl group. X ³ represents a halogen atom. Z ³ represents an alkyl group substituted with a functional group having reactivity with a carboxyl group. r and s each independently represent an integer of 0 to 3. 1 ≦ r + s ≦ 3. ]
The ratio [number of moles of Si atoms derived from the compound represented by the formula (II)] / [number of moles of Si atoms derived from the compound represented by the formula (III)] was 99.5 / 0. The container of claim 1, which is in the range of 5-80.0 / 20.0. The container according to claim ^1, wherein M ¹ is Al. The ratio of [weight of inorganic component derived from the compound (L)] / [total weight of organic component derived from the compound (L) and weight of organic component derived from the polymer (X)] is: The container according to any one of claims 1 to 3, which is in the range of 20.0 / 80.0 to 80.0 / 20.0. The ratio of [weight of inorganic component derived from the compound (L)] / [total weight of organic component derived from the compound (L) and weight of organic component derived from the polymer (X)] is: The container according to any one of claims 1 to 3, which is in the range of 30.5 / 69.5 to 70.0 / 30.0. The container according to any one of claims 1 to 5, wherein the substrate is a multilayer body including an ethylene-vinyl alcohol copolymer layer. The container according to claim 1, which is a gasoline tank.