JP7119361B2 - Resin composition and laminate comprising the same - Google Patents

Description

The present invention provides (A) a polyethylene or a copolymer of ethylene and vinyl ester having a vinyl ester content of 20% by weight or less, and (B) a vinyl ester having a vinyl ester content of 25% by weight or more and the vinyl ester of (A). The present invention relates to a resin composition comprising a copolymer of ethylene and vinyl ester with a content difference of 10% by weight or more, and (C) a compatibilizer. The present invention also relates to a laminate containing at least one layer made of these resin compositions.

Packaging materials made of thermoplastic resin for food, beverages, pharmaceuticals, etc. are made of ethylene-vinyl alcohol copolymer (hereinafter referred to as , sometimes abbreviated as EVOH) are used in various applications. However, EVOH is hydrophilic, and its gas barrier properties, etc., deteriorate when it absorbs moisture. Therefore, it is generally known that EVOH is used as an intermediate layer in laminates with highly water-resistant polyolefins such as polyethylene and polypropylene. ing.

Since EVOH has many hydroxyl groups in its molecule, it has extremely low affinity with thermoplastic resins having no polar groups, such as polyethylene and polypropylene, and the two generally do not adhere. Therefore, for EVOH, which is difficult to adhere to polyolefin, a graft-modified ethylene-based resin composition grafted with an unsaturated carboxylic acid or a derivative thereof (for example, Patent Documents 1 and 2) or an ethylene-vinyl acetate copolymer hydrolyzate (for example, , Patent Document 3) is already known to be used as an adhesive.

JP-A-61-270155 JP-A-62-158043 JP-A-7-108655

However, although a graft-modified ethylene-based resin composition grafted with an unsaturated carboxylic acid or its derivative has excellent adhesiveness, it is highly reactive with EVOH, so repeated kneading may cause problems in the extruder or die. As the viscosity of the resin remaining in the resin rises, it is colored and gelled, resulting in a large number of fish eyes and gel-like substances mixed in the product, which poses a problem of lowering the commercial value.

On the other hand, the ethylene-vinyl acetate copolymer hydrolyzate does not cause coloration or gelation due to repeated kneading, and the adhesion to EVOH is improved by adding an adhesive resin to the ethylene-vinyl acetate copolymer hydrolyzate. However, the effect was small, and it often peeled off when receiving a small impact or friction during transportation or use, and sufficient adhesive strength could not be obtained.

Against this background, there has been a demand for adhesives that are excellent in adhesiveness and that can be reused repeatedly.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resin composition having excellent adhesiveness to polyethylene and EVOH, and a laminate comprising the same.

(A) polyethylene or a copolymer of ethylene and vinyl ester having a vinyl ester content of 20% by weight or less (hereinafter sometimes abbreviated as component (A)); and (B) a vinyl ester content of 25% by weight. % or more, and the difference in vinyl ester content from (A) is 10% by weight or more (hereinafter sometimes abbreviated as component (B)), and (C) phase The problem is solved by a resin composition characterized by containing a solubilizer (hereinafter sometimes abbreviated as component (C)).

The present invention will be described in detail below.

Component (A) used in the present invention is polyethylene or a copolymer of ethylene and vinyl ester having a vinyl ester content of 20% by weight or less.

Examples of component (A) polyethylene include high-pressure low-density polyethylene, high-density polyethylene, medium-density polyethylene, ethylene/1-butene copolymer, ethylene/1-hexene copolymer, and ethylene/1-octene copolymer. polymers, ethylene/4-methyl-1-pentene copolymers, and the like.

Vinyl esters used in the copolymer of ethylene and vinyl ester of component (A) include vinyl acetate, vinyl formate, vinyl propionate, vinyl valerate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, and vinyl caprate. , aliphatic vinyl esters such as vinyl laurate and vinyl stearate, and aromatic vinyl esters such as vinyl benzoate.

These may be used singly or in combination of two or more. Among them, high-pressure low-density polyethylene, high-density polyethylene, ethylene/1-butene copolymer, ethylene/1-hexene copolymer, and ethylene/vinyl acetate copolymer are added to component (B) and component (C ), the adhesiveness of the resin composition of the present invention to polyethylene is improved. If the vinyl ester content of component (A) exceeds 20% by weight, the adhesiveness of the resin composition of the present invention to polyethylene deteriorates.

High-pressure radical polymerization can be exemplified as the method for producing the high-pressure low-density polyethylene of component (A), and such resins can be conveniently selected from commercially available products. It is marketed under trade names. The method for producing high-density polyethylene, ethylene/1-butene copolymer, and ethylene/1-hexene copolymer is not particularly limited, but high- to medium-range production using Ziegler-Natta catalysts, Phillips catalysts, or metallocene catalysts is possible. - A low-pressure ion polymerization method or the like can be exemplified, and such a resin can be conveniently selected from commercially available products. For example, they are commercially available from Tosoh Corporation under the trade names of Nipolon Hard, Nipolon-L, and Nipolon-Z.

The method for producing the copolymer of ethylene and vinyl ester of component (A) is not particularly limited as long as the copolymer of ethylene and vinyl ester can be produced, but a known high pressure radical polymerization method can be used. and ion polymerization method can be exemplified. It is commercially available from Tosoh Corporation under the trade name of Ultrasen as an ethylene/vinyl acetate copolymer produced by a high-pressure radical polymerization method.

Component (B) of the present invention is a copolymer of ethylene and vinyl ester having a vinyl ester content of 25% by weight or more and a vinyl ester content different from that of component (A) by 10% by weight or more. Vinyl esters used in the copolymer of ethylene and vinyl ester of component (B) include vinyl acetate, vinyl formate, vinyl propionate, vinyl valerate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, and vinyl caprate. , aliphatic vinyl esters such as vinyl laurate and vinyl stearate, aromatic vinyl esters such as vinyl benzoate, and the like, and may be used singly or in combination of two or more. Among them, it is preferable to use an ethylene/vinyl acetate copolymer because it is economical.

Component (B) has a vinyl ester content of 25% by weight, preferably 42% by weight or more, and more preferably 60% by weight or more. Adhesion of the resin composition of the invention to EVOH is improved. If the vinyl acetate content of component (B) is less than 25% by weight, the adhesiveness of the resin composition of the present invention to EVOH deteriorates.

The method for producing the copolymer of ethylene and vinyl ester in the component (B) is not particularly limited, and includes known production methods such as high-pressure radical polymerization, solution polymerization and latex polymerization. are commercially available from Tosoh Corporation under the trade name of Ultrasen and from Lanxess Corporation under the trade name of Levaprene.

Component (C) of the present invention is a compatibilizer for component (A) and component (B), and includes, for example, a copolymer of ethylene and vinyl ester. Preferred are copolymers of ethylene and vinyl esters in which compatibilizer (C) has a higher vinyl ester content than component (A) and a lower vinyl ester content than component (B). Vinyl esters include aliphatic vinyl esters such as vinyl acetate, vinyl formate, vinyl propionate, vinyl valerate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caprate, vinyl laurate, and vinyl stearate, and benzoic acid. Aromatic vinyl esters, such as vinyl, etc. are mentioned. Among them, it is preferable to use an ethylene/vinyl acetate copolymer because it is economical, and it may be used alone or in combination of two or more. In particular, by using two or more compatibilizers (C) in combination, the dispersibility of component (A) and component (B) is improved, and the adhesiveness of the resin composition of the present invention to polyethylene and EVOH is good. Therefore, it is preferable.

When a copolymer of ethylene and vinyl ester is used as the compatibilizer (C), the vinyl ester content is such that the vinyl ester content difference between the compatibilizer (C) and component (A) or component (B) is 1. Preferred are copolymers of ethylene and vinyl esters that are ~40 wt%, more preferably copolymers of ethylene and vinyl esters that have a vinyl ester content difference of 1 to 30 wt%, most preferably vinyl ester content differences. is a copolymer of ethylene and vinyl ester with a content of 1 to 20% by weight.

When two or more copolymers of ethylene and vinyl ester are used as the compatibilizing agent (C), the difference in vinyl ester content between each is preferably 1 to 20% by weight, more preferably 1 to 15%. % by weight, most preferably 1-10% by weight.

The method for producing the copolymer of ethylene and vinyl ester, which is the compatibilizing agent (C) in the present invention, is not limited, but includes known production methods such as high pressure radical polymerization, solution polymerization and latex polymerization. These resins can be conveniently selected from commercially available products, and are commercially available as ethylene/vinyl acetate copolymers from Tosoh Corporation under the trade name of Ultrathen and from Lanxess Corporation under the trade name of Levaprene.

From the viewpoint of improving adhesion to polyethylene and EVOH, a suitable blending ratio of the resin composition is 4 to 95 parts by weight of component (A), 4 to 95 parts by weight of component (B) and 1 part by weight of component (C). to 50 parts by weight (the total of (A), (B) and (C) is 100 parts by weight), more preferably 15 to 90 parts by weight of component (A) and 5 to 50 parts by weight of component (B) 75 parts by weight and 5 to 45 parts by weight of component (C) (the sum of (A) and (B) and (C) is 100 parts by weight), most preferably 15 to 80 parts by weight of component (A) 15 to 50 parts by weight of component (B) and 5 to 40 parts by weight of component (C) (the total of (A), (B) and (C) is 100 parts by weight).

The resin composition is preferably produced by melt-kneading from the viewpoint of improving dispersibility. The method of melt-kneading is not particularly limited as long as it is a melt-kneading apparatus capable of uniformly dispersing each component, and a generally used resin mixing apparatus can be used. Examples thereof include melt-kneading devices such as single-screw extruders, multi-screw extruders, Banbury mixers, pressure kneaders, and rotary rolls. Among them, a twin-screw extruder, which has a high degree of kneading and can be operated continuously, is preferable because the dispersion state can be made fine and uniform. The melting temperature is preferably between the melting point of component (A) and about 260°C.

In order to further enhance the dispersibility of the resin composition, a cross-linking agent (D) (hereinafter sometimes abbreviated as component (D)) is added to the components (A), (B) and (C). good too. Component (D) is not particularly limited as long as it can crosslink each component, but it is preferable to use an organic peroxide in consideration of reactivity and the like.

The organic peroxide of the cross-linking agent (D) is not particularly limited as long as it is an organic peroxide. Butylperoxy)hexane, 1,1-di(t-butylperoxy)cyclohexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3,1,3-bis(t-butylperoxyisopropyl ) benzene, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,3-di-(t-butylperoxy)-diisopropylbenzene, n-butyl-4,4-bis( t-butylperoxy)valerate, benzoyl peroxide, p-chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, t-butylperoxybenzoate, t-butylperoxyisopropyl carbonate, diacetyl peroxide, lauroyl peroxide, t-butylcumyl peroxide, etc. can be mentioned. These can be used alone or in combination of two or more.

Among them, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane and 1,1-di(t-butylperoxy)cyclohexane are preferably used from the viewpoint of reactivity. Moreover, together with the cross-linking agent (D), a cross-linking aid such as triallyl isocyanurate and divinylbenzene may be used, if necessary.

In addition to the above ingredients, antioxidants, lubricants, neutralizers, antiblocking agents, surfactants, slip agents, silicone oil, UV absorbers, flame retardants, release agents, foaming agents, fragrances, if necessary It may contain one or two or more commonly used additives such as

Further, in order to enhance the adhesiveness to EVOH which further enhances the dispersibility of the resin composition in the present invention, the resin composition may be hydrolyzed to convert the vinyl ester into vinyl alcohol.

The hydrolysis treatment method is not particularly limited, but from the viewpoint of productivity, it is preferable to directly hydrolyze the pellets or powder of the resin composition in an alkali. The degree of saponification of the resin composition of the present invention is preferably 10% by weight or more, and if it is 10% by weight or more, the adhesion to EVOH is sufficient.

Moreover, the resin composition of the present invention can be used as a molding material in any form such as pellets or powder. Furthermore, since the resin composition of the present invention has thermoplasticity, it can be molded using a normal molding processing apparatus used for general thermoplastic resins.

The resin composition of the present invention can be used as an adhesive because it has excellent adhesion to polyethylene and EVOH.

Furthermore, when the resin composition of the present invention is used as an adhesive, it may be used as a laminate comprising a layer made of the adhesive and at least one layer made of a material other than the adhesive.

The laminate of the present invention preferably has a layer comprising the adhesive and at least one layer of polyolefin such as polyethylene or polypropylene, polyester such as polylactic acid or polybutylene terephthalate, polyamide such as nylon, or EVOH layer. Moreover, it may have a laminate structure having a combination of two or more of these or a combination of various thermoplastic resin layers. Especially from the viewpoint of cost and moldability, those containing polyolefin and EVOH are preferable.

The polyolefin is not particularly limited, and examples thereof include high pressure low density polyethylene, high density polyethylene, medium density polyethylene, ethylene/1-butene copolymer, ethylene/1-hexene copolymer, ethylene/1 - Ethylene-based polymers such as octene copolymers, ethylene/4-methyl-1-pentene copolymers, ethylene/vinyl acetate copolymers, ethylene/acrylic acid ester copolymers, and ethylene/methacrylic acid ester copolymers , polypropylene, propylene/ethylene copolymer, propylene/1-butene copolymer, poly-1-butene, poly-1-hexene, poly-4-methyl-1-pentene and the like.

EVOH is a copolymer composed of ethylene units and vinyl alcohol units. The EVOH used in the present invention is not particularly limited, and examples thereof include known EVOH used in molding applications. The method for producing EVOH is not particularly limited. For example, EVOH can be produced by producing an ethylene-vinyl ester copolymer according to a known method and then saponifying it. However, the content of ethylene units in EVOH is preferably 55 mol % or less, more preferably 10 to 55 mol %, from the viewpoints of high barrier properties against gases, organic liquids, etc. and good moldability. Such resins can be conveniently selected from commercially available products, and are commercially available, for example, under the trade name of EVAL from Kuraray Co., Ltd., and under the trade name of Soarnol from The Nippon Synthetic Chemical Industry Co., Ltd., respectively.

The laminate of the present invention can be molded using a normal molding processing apparatus, and the molding processing methods include, for example, extrusion molding, blow molding, sheet molding, injection molding, compression molding, calendar molding, and vacuum molding. It can be formed into any shape such as sheet, film, pipe, block, etc. By adopting a laminated structure with other materials, the laminate can have gas barrier properties. , mechanical properties, oil resistance, and weather resistance.

The laminate of the present invention can be widely used for packaging materials, containers, and the like made of thermoplastic resins such as foods, beverages, and pharmaceuticals that require these properties.

The adhesive of the present invention has excellent adhesion to polyethylene and EVOH, and can adhere polyethylene and EVOH.

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.
[Saponification degree]
Using each resin composition obtained in Examples, the vinyl ester content was measured according to JIS K7192 (1999), and the degree of saponification (% by weight) was determined according to the following formula.
Degree of saponification (% by weight) = 100 × {(vinyl ester content of resin composition before hydrolysis) - (vinyl ester content of resin composition after hydrolysis)} / (vinyl of resin composition before hydrolysis) ester content)
[Adhesion strength to each adherend]
Adhesiveness to each adherend (low-density polyethylene (LDPE) and EVOH) was investigated using each resin composition obtained in Examples. The evaluation procedure for adhesive strength is as follows. Each resin composition was press-molded using a 50t automatic press machine manufactured by Shindo Kogyo Co., Ltd. to create a press-molded article having a thickness of 0.1 mm. Subsequently, using a hot tack tester manufactured by Tester Sangyo Co., Ltd., the adhesive and the adherend were heat-sealed by heating up and down at a sealing temperature of 200 ° C., a sealing pressure of 0.1 MPa, and a sealing time of 2.5 seconds. Using a tester (Tensilon RTE-1210 manufactured by ORIENTEC), the adhesive strength (N/15 mm width) at 180 degree peeling was measured at a sample width of 15 mm and a tensile speed of 300 mm/min. Measurements were repeated 3-5 times on the same sample. The following LDPE and EVOH were used for evaluation.
(1) LDPE: Low-density polyethylene with a melt mass flow rate of 7 g/10 minutes and a density of 922 kg/m ³ (manufactured by Tosoh Corporation, trade name Petrothene 204)
(2) EVOH: ethylene-vinyl alcohol copolymer (Kuraray Co., Ltd., trade name EVAL E171B) with a melt mass flow rate of 1.7 g/10 min and an ethylene content of 44 mol%
[Tensile breaking stress]
Tensile breaking stress (MPa) was obtained using each resin composition obtained in Examples. Each resin composition was press-molded using a 50t automatic press machine manufactured by Shindo Kogyo Co., Ltd. to create a press-molded article having a thickness of 0.1 mm. The tensile breaking stress was measured using a tensile tester (Tensilon RTE-1210 manufactured by ORIENTEC) in accordance with JIS-6924-2. The same sample was repeated 3-5 times.

Example 1
As component (A), an ethylene/vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name Ultrathen 625) having a melt mass flow rate of 14 g/10 min, a density of 935 kg/m ³ and a vinyl acetate content of 15% by weight (hereinafter referred to as component (A-1)) is 65 parts by weight, and the component (B) is an ethylene/vinyl acetate copolymer having a melt mass flow rate of 5 g/10 min and a vinyl acetate content of 80% by weight (manufactured by LANXESS Corporation, 20 parts by weight of Levaprene 800 (trade name, hereinafter sometimes abbreviated as component (B-1)), and ethylene having a melt mass flow rate of 70 g/10 minutes, a density of 968 kg/m ³ , and a vinyl acetate content of 42% by weight as component (C). 15 parts by weight of a vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name Ultrasen 760, hereinafter sometimes abbreviated as component (C-1) (1)), and an organic peroxide ( 0.02 part by weight of PERHEXA 25B manufactured by NOF Corporation) was dry-blended and melt-kneaded at a melt temperature of 190° C. with a twin-screw extruder to obtain a resin composition in the form of pellets. Subsequently, this resin composition was hydrolyzed in a 1 part by weight sodium hydroxide methanol solution at 60° C. to obtain this resin composition. Using the obtained resin composition, the adhesion to LDPE and EVOH was evaluated, and the results are shown in Table 1.

Example 2
As component (A), high-pressure low-density polyethylene having a melt mass flow rate of 7 g/10 min and a density of 922 kg/m ³ (manufactured by Tosoh Corporation, trade name Petrothene 204, hereinafter sometimes abbreviated as component (A-2)) ) was used to obtain the present resin composition in the same manner as in Example 1. The obtained resin composition was evaluated, and the results were as shown in Table 1.

Example 3
As component (B), an ethylene-vinyl acetate copolymer having a melt mass flow rate of 70 g/10 min, a density of 968 kg/m ³ and a vinyl acetate content of 42% by weight (manufactured by Tosoh Corporation, trade name Ultrathen 760, hereinafter referred to as component ( B-2)), and an ethylene/vinyl acetate copolymer (manufactured by Tosoh Corporation) having a melt mass flow rate of 18 g/10 min, a density of 949 kg/m ³ , and a vinyl acetate content of 28% by weight as component (C). , trade name Ultrathen 710, hereinafter sometimes abbreviated as components (C-1) and (2). The obtained resin composition was evaluated, and the results were as shown in Table 1.

Example 4
The present resin composition was obtained in the same manner as in Example 1, except that component (C-3) described below was used as component (C). The obtained resin composition was evaluated, and the results were as shown in Table 1.

[Component of component (C-3)]
A dry blend of 5 parts by weight each of the following three types of ethylene-vinyl acetate copolymer Ethylene-vinyl acetate copolymer having a melt mass flow rate of 20 g/10 minutes, a density of 940 kg/m ³ , and a vinyl acetate content of 20% by weight ( manufactured by Tosoh Corporation, trade name Ultrasen 633)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 30 g/10 min, a density of 954 kg/m ³ and a vinyl acetate content of 32% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 750)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 5 g/10 min and a vinyl acetate content of 50% by weight (manufactured by LANXESS, trade name Levaprene 500)
Example 5
The present resin composition was obtained in the same manner as in Example 1 except that the following component (C-5) was used as the component (C). The obtained resin composition was evaluated, and the results were as shown in Table 1.

[Component of component (C-5)]
3 parts by weight of each of the following five types of ethylene-vinyl acetate copolymers were dry-blended Ethylene ^- vinyl acetate copolymer ( manufactured by Tosoh Corporation, trade name Ultrasen 633)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 18 g/10 min, a density of 949 kg/m ³ and a vinyl acetate content of 28% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 710)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 30 g/10 min, a density of 954 kg/m ³ and a vinyl acetate content of 32% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 750)
・Ethylene-vinyl acetate copolymer having a melt mass flow rate of 70 g/10 min, a density of 968 kg/m ³ and a vinyl acetate content of 42% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 760)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 5 g/10 min and a vinyl acetate content of 50% by weight (manufactured by LANXESS, trade name Levaprene 500)
Example 6
The present resin composition was obtained in the same manner as in Example 1 except that the following component (C-7) was used as the component (C). The obtained resin composition was evaluated, and the results were as shown in Table 1.

[Component of component (C-7)]
A dry blend of 3 parts by weight each of the following seven types of ethylene-vinyl acetate copolymer Ethylene-vinyl acetate copolymer having a melt mass flow rate of 20 g/10 minutes, a density of 940 kg/m ³ , and a vinyl acetate content of 20% by weight ( manufactured by Tosoh Corporation, trade name Ultrasen 633)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 18 g/10 min, a density of 949 kg/m ³ and a vinyl acetate content of 28% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 710)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 30 g/10 min, a density of 954 kg/m ³ and a vinyl acetate content of 32% by weight (manufactured by Tosoh Corporation, trade name: Ultrathen 750)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 70 g/10 min, a density of 968 kg/m ³ and a vinyl acetate content of 42% by weight (manufactured by Tosoh Corporation, trade name Ultrathen 760);
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 5 g/10 min and a vinyl acetate content of 50% by weight (manufactured by LANXESS, trade name Levaprene 500)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 5 g/10 minutes and a vinyl acetate content of 60% by weight (manufactured by LANXESS, trade name Levaprene 600)
- Ethylene-vinyl acetate copolymer having a melt mass flow rate of 5 g/10 min and a vinyl acetate content of 70% by weight (manufactured by LANXESS, trade name Levaprene 700)
Example 7
The present resin composition was prepared in the same manner as in Example 1 except that the component (A-1) was 70 parts by weight, the component (B-1) was 20 parts by weight, and the component (C-7) was 10 parts by weight. got The obtained resin composition was evaluated, and the results were as shown in Table 1.

Example 8
The present resin composition was produced in the same manner as in Example 1 except that the component (A-1) was 55 parts by weight, the component (B-1) was 15 parts by weight, and the component (C-7) was 30 parts by weight. got The obtained resin composition was evaluated, and the results were as shown in Table 1.

Example 9
This resin composition was obtained in the same manner as in Example 6, except that the hydrolysis treatment was not performed. The obtained resin composition was evaluated, and the results were as shown in Table 1.

Example 10
The present resin composition was prepared in the same manner as in Example 1 except that the component (A-1) was 40 parts by weight, the component (B-1) was 40 parts by weight, and the component (C-7) was 20 parts by weight. got The obtained resin composition was evaluated, and the results were as shown in Table 1.

Comparative example 1
The present resin composition was obtained in the same manner as in Example 1, except that 85 parts by weight of component (A-1) and 15 parts by weight of component (C-1) were used. When the obtained resin composition was evaluated, the adhesiveness to EVOH was low. Table 2 shows the results.

Comparative example 2
The present resin composition was obtained in the same manner as in Example 1, except that 85 parts by weight of component (B-1) and 15 parts by weight of component (C-1) were used. When the obtained resin composition was evaluated, the adhesiveness to LDPE was low. Table 2 shows the results.

Comparative example 3
The present resin composition was obtained in the same manner as in Example 1, except that 75 parts by weight of component (A-1) and 25 parts by weight of component (B-1) were used. When the obtained resin composition was evaluated, the adhesiveness to EVOH was low. Table 2 shows the results.

Claims (12)

A resin composition comprising the following components (A) to (C) and containing 1 to 50 parts by weight of component (C) (the total of (A) and (B) and (C) is 100 parts by weight) .
(A) a copolymer of ethylene and vinyl ester having a vinyl ester content of 20% by weight or less; (C) a compatibilizer containing at least one copolymer of ethylene and a vinyl ester having a vinyl ester content higher than that of the component (A) and lower than that of the component (B) (C) the compatibilizing agent is a copolymer of ethylene and vinyl ester having a vinyl ester content different from that of component (A) or component (B) within 1 to 40% by weight. The resin composition according to . (C) The compatibilizing agent is composed of two or more copolymers of ethylene and vinyl ester, and the vinyl ester content difference between the respective copolymers of ethylene and vinyl ester is 1 to 20 wt. %. A resin composition comprising a hydrolyzate of the resin composition according to any one of claims 1 to 3. 5. The resin composition according to claim 4, wherein the hydrolyzate has a degree of saponification of 10% by weight or more. 6. The resin composition according to any one of claims 1 to 5, further comprising (D) a cross-linking agent. An adhesive comprising the resin composition according to any one of claims 1 to 6. A laminate comprising a layer comprising the adhesive according to claim 7 and at least one layer comprising a material other than the adhesive. 9. The laminate according to claim 8, wherein at least one layer made of a material other than the adhesive is a layer containing an ethylene-vinyl alcohol copolymer. 10. The laminate according to claim 8, wherein at least one layer made of a material other than the adhesive is a layer containing polyethylene. A laminate in which a layer containing an ethylene-vinyl alcohol copolymer, a layer comprising the adhesive according to claim 7, and a layer containing polyethylene are laminated in this order. A hydrolyzate of a resin composition containing the following components (A) to (C) and a crosslinked product of (A) to (C).
(A) polyethylene or a copolymer of ethylene and vinyl ester having a vinyl ester content of 20% by weight or less; (B) a vinyl ester content of 25% by weight or more; % or more copolymer of ethylene and vinyl ester (C) compatibilizer