JPH0439331A - Resin composition and multilayer structure using the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an adhesive resin composition useful for producing polyester and/or polyolefin multilayer films, sheets, containers, etc., and a multilayer film useful as a packaging material. Concerning structures.

[Prior Art] Polyester, particularly polyethylene terephthalate, has excellent chemical resistance, heat resistance, mechanical properties, electrical properties, etc., and is used in many industrial products as fibers, films, etc. Polyethylene terephthalate also has excellent gas barrier properties and transparency, so it is used as a material for containers for seasonings, soft drinks, detergents, cosmetics, etc.

However, since polyethylene terephthalate has a high melting point, it has poor heat-sealing properties, and is rigid, which poses problems when used as some packaging materials. Therefore, the development of a multilayer film consisting of polyethylene terephthalate and polyolefin was considered in order to solve these drawbacks. However, there still remains a problem to be solved in this case, namely the problem of adhesion between polyethylene terephthalate and polyolefin. Since they are significantly different, there is no adhesive that can effectively bond them together.

[Problems to be solved by the present invention]

The present invention is intended to solve the above problems, and its purpose is to provide a resin that has excellent adhesion to both aromatic ring-containing polyester resins and polyolefin resins, and a multilayer structure using the same. It is about making offerings.

[Means to solve the problem]

The present invention relates to (A) a polyester resin containing an amino group in the molecule, or a polyester resin containing an amino group in the molecule and having a small number (both one) of hydroxyl or carboxyl groups in the molecule, and (B) a polyester resin containing an amino group in the molecule. A resin composition obtained by reacting a polyolefin having a functional group capable of reacting with a hydroxyl group, a carboxyl group, or an amino group therein, and an aromatic ring-containing polyester or polyolefin resin layer on at least one side of the resin composition layer. The present invention relates to a multilayer structure having.

The polyester resin containing an amino group in the molecule used in the present invention is a polyester resin containing an amino group at the end of the molecule or in the molecule as shown in ① below. It has a repeating unit represented by:

I -R, -N-R, ~ ■ A polyester resin containing an amino group in the molecule is obtained by subjecting a dicarboxylic acid compound or its ester to a polyester obtained by condensing diols by a known method to the polyester resin containing an amino group in the molecule. Alcohols, diols, containing the indicated residues,
It can be obtained by carrying out a mixed reaction of carboxylic acids, etc., or by copolymerizing alcohols, diols, and carboxylic acids having residues indicated by (■) during the condensation reaction of the polyester.

Dicarboxylic acid compounds that are constituents of polyester resins include malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, sebacic acid, azelaic acid, speric acid, dodecanedicarboxylic acid, 3-methylazelaic acid, and cyclohexane. 1,3-dicarboxylic acid, cyclopentane-1,3-dicarboxylic acid, terephthalic acid, methoxyterephthalic acid, ethoxyterephthalic acid, fluoroterephthalic acid, chloroterephthalic acid, methylterephthalic acid, isophthalic acid, phthalic acid, methoxyisophthalic acid, diphenylmethane-4,4'-dicarboxylic acid, diphenylmethane-3,3'-dicarboxylic acid, diphenyl ether-4
, 4'-dicarboxylic acid, diphenyl-4,4'-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-1,5-dicarboxylic acid, naphthalene-1,4-dicarboxylic acid, 2,5-norbornanedicarboxylic acid Acid, 4°4
'-oxydibenzoic acid, 4,4'-methylene dibenzoic acid, diglycolic acid, thiodipropionic acid, dibenzoic acid,
Examples include P-oxy(P-carboxyphenyl)benzoic acid, tetramethylene-bis(p-oxybenzoic acid), dimer acid, hydrogenated dimer acid, and esters thereof. These dicarboxylic acid compounds or esters thereof may be used alone or in a mixture of two or more.

On the other hand, diols that are polyester resin forming components include ethylene glycol, diethylene glycol,
polyethylene glycol, 1,3-propanediol,
1.2-propanediol, 1.3-butanediol,
■, 4-butanediol, 2-ethylhexane-1,3
-diol, 2゜2.4-trimethyl-1,3-bentanediol, neopentyl glycol, 1,6-hexanediol, 1,12-dodecanediol, cyclohexane-1,4-diol, cyclohexane-1゜3- Diol, I, 4-cyclohexanedimethanol, p-xylene diol, 4,4'-thiodiphenol, 4.4
'-Methylene diphenol, 4.4'-dihydroxybiphenyl, 4.4' isopropylidene diphenol, 4
．． 4'-isopropylidene bis(2,6-dichlorophenol), 2.5-naphthalenediol, 2.5-norbornanediol, hydroquinone, resorcinol, methylhydroquinone, chlorohydroquinone, acetylhydroquinone, acetoxyhydroquinone, nitrohydroquinone, dimethylamino Hydroquinone, 1.4-
Dihydroxynaphthol, 1.5-dihydroxynaphthol, 1.6-dihydroxynaphthol, 2.6-dihydroxynaphthol, 2.7-dihydroxynaphthol, 2°2-bis(4-hydroxy-3,5-dichlorophenyl)-propane, 2.2-bis(4-hydroxy-
3-methylphenyl)-propane, 2,2bis(4-hydroxy-3-chlorophenyl)propane, bis(4-
Hydroxy-3,5-dimethylphenyl)-methane, bis(4-hydroxy-3,5-dichlorophenyl)-methane, bis(4-hydroxy-3,5-dibromophenyl)-methane, 1,1-bis (4-hydroxyphenyl)cyclohexane, 4,4'-dihydroxydiphenylbis(4-hydroxyphenyl)ketone, bis(4-hydroxy-3,5-dimethylphenyl)ketone, bis(
4-hydroxy-3,5-dichlorophenyl)ketone,
Bis(4-hydroxyphenyl) sulfide, bis(4-hydroxyphenyl)
-hydroxy-3-chlorophenyl) sulfide, bis(4-hydroxyphenyl) sulfone, bis(4-hydro-t'z-3,5-dichlorophenyl) ether, timer acid hydrogenated reduced diol, polyolefin polyol, and the like. These diols may be used alone or in a mixture of two or more.

Further, examples of the alcohols, diols, and carboxylic acids having the residue represented by (2) above include the following.

Ethanolamine, 3-amino-1-propertool, 2
-amino-1-propatur, isopropaturamine, 2-amino-2-methyl-1-propatur, 4-(
(aminomethyl)-cyclohexanemethanol, 3-amino-3-methyl-1-butanol, 3-aminomethyl-
3,5,5-trimethylcyclohexanol, ■-amino-1-cyclopentanemethanol, 3-amino-2-
Methylbenzyl alcohol, 2-amino-2-ethyl-
1,3-propanediol, 2-amino-2-methyl-
1,3-propanediol, p-aminobenzoic acid, 4-
(Methylamino)benzoic acid, 2-aminoisobutanoic acid,
1-amino-1-cyclopentanecarboxylic acid, 2-methylaminoethanol, 2-ethylaminoethanol, 2
-(tertbutylamino)ethanol, jetanolamine, 3-(tertbutylamino)-1,2-propanediol, dimethylethanolamine, diethylethanolamine, dibutylethanolamine, N.

N-diethylhydroxylamine, 1-diethylamino-2-propatol, 5-diethylamino-2-pentanol, N-hydroxyethylpyrrolidine, 1-methyl-2-pyrrolidineethanol, 3-hydroxy-N-methylpiperidine, 2- (N-ethyl-m-toluidino)
-Ethanol, N-methylgetanolamine, N-butylgetanolamine, N-phenyldiethanolamine, 3-(diethylamino)-1,2-propanediol, N-(3-chlorophenyl)-2,2'-imino Diethanol, 3-(N-benzyl-N-methylamino)-1,2-propanediol, 3-pyrrolidino-1,
2-propanediol, 3-piveridino-1,2-propanediol, N.

N'-bis(2-hydroxyethyl)piperazine, N,
N'-bis-(2-hydroxyethyl)-2-methylpiperazine, 3-morpholino-1,2=propanediol, etc., and these may be used alone or in combination of two or more.

The amount used is generally 0.01% by weight based on the polymer.
It is used in a range of 40% by weight. If the amount used is too small, the effect will not be sufficiently expressed, and if it is used in excess, not only will the commensurate effect not be obtained, but the stability etc. of the resulting polymer will be adversely affected.

In addition, as a polyester skeleton, (a) the following general formula [I[
], polyester obtained by reaction polymerization of (b) polyester or polyester precursor, and (C) dicarboxylic acid compound may also be used. In this case as well, the desired amino group-containing polyester resin can be obtained by mixing and reacting the obtained polyester with alcohols, diols, and carboxylic acids containing the residues shown above, or by copolymerizing the polyester during polymerization. be able to.

[R6 is a monovalent organic group] Here, examples of the monoepoxy compound represented by the formula (II) include epoxy compounds in which the substituent R1 is an alkyl group having about 1 to 50 carbon atoms, represented by HzCCHCHzCHzCHzCHi,\1 Compounds, epoxy compounds of (poly)alkylene glycol monoalkyl ethers as represented by etc., alkyl glycidyl ethers having about 1 to 50 carbon atoms as represented by etc., and R1 is carbon as represented by An epoxy compound which is a perfluoroalkyl group with about 1 to 50 carbon atoms, and an epoxy compound where R1 is an alkenyl group with about 1 to 50 carbon atoms as shown in the following, r ll3 HzCCI CHz+0CHCHz-÷y-OCbH
R1 as expressed by s\/ etc. is -CHz OAr (A
An epoxy compound in which r is an aromatic group with about 6 to 50 carbon atoms which may have a substituent, and R1 contains a silicon atom or nitrogen atom with about 1 to 50 carbon atoms, as shown in Examples include epoxy compounds which are organic groups.

These may be used alone or in combination of two or more.

Among these epoxy compounds, particularly preferred are monoepoxy compounds having a long chain alkyl group having 4 to 50 carbon atoms.

In addition, the polyester precursor of the polyester or polyester precursor is a compound represented by the following general formulas [1[I] to [V], such as the aforementioned polyester oligomer, bishydroxyethyl terephthalate, bishydroxypropyl Examples include terephthalate, bishydroxybutyl terephthalate, and the like.

Furthermore, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, methyl 3-hydroxybenzoate, ethyl 3-hydroxybenzoate, etc. can also be used.

In addition, as the (C) dicarboxylic acid compound used here,
The dicarboxylic acids or esters thereof exemplified as the above-mentioned polyester constituents may be used alone or in a mixture of two or more.

The monoepoxy compound, dicarboxylic acid, and polyester or polyester precursor can be reacted in any quantitative ratio, but the monoepoxy compound may be reacted with 5 to 1 part by weight per 100 parts by weight of the polyester or polyester precursor.
00 parts by weight, more preferably 10 to 100 parts by weight, and 5 to 100 parts by weight of dicarboxylic acid, more preferably 10 to 1 part by weight.
It is particularly preferable to use 00 parts by weight of the monoepoxy compound and to react the monoepoxy compound in a molar ratio of 2 to the dicarboxylic acid.

The reaction may be performed by reacting a monoepoxy compound ([] with a dicarboxylic acid and then reacting with a polyester or a polyester precursor, or by reacting a monoepoxy compound ([] with a dicarboxylic acid),
The dicarboxylic acid and the polyester or polyester precursor may be reacted at the same time.

In either case, the reaction is first carried out at normal pressure at 50 to 300°C, preferably from 120°C to 270°C for 5 minutes to 10 hours, and then at 150°C to 350°C under reduced pressure, preferably at 170°C.
Polymerization is completed at 0'C to 300C.

At this time, the molar ratio of the epoxy compound to the dicarboxylic acid used in the reaction was set to 1.5 to 2.0, and the reaction was carried out at normal pressure until the acid value of the reaction mixture became less than 10% of the initial acid value. By starting pressure reduction later, a relatively high molecular weight polymer can be stably obtained.

When reducing the pressure, it is preferable to gradually reduce the pressure, and it is preferable that the time required to reduce the pressure from normal pressure to 1 Hg is 30 minutes or more, especially when gradually reducing the pressure from 10 Hg to 1 Hg. It is preferable to do so.

Although the reaction and polymerization can proceed without a catalyst, they may be carried out with the addition of a catalyst if necessary.

The catalysts used include tertiary amines such as benzyldimethylamine, dimethylaminopyridine, and tributylamine, and metal catalysts such as tetrabutoxytitanium, germanium dioxide, antimony trioxide, calcium acetate, magnesium acetate, and zinc acetate. can be mentioned.

These may be used alone or in combination of two or more. The amount of catalyst used is 1 to 50,000 ppm based on the polymer.

The polyolefins used in the present invention (B) having a functional group capable of reacting with a hydroxyl group, a carboxyl group, or an amino group in the molecule include isocyanate (-NGO
), activated methylol (-NCH1OH), activated alkoxymethylalkoxysilane (-3iOR), cyanate ester (-0CN), carbodiimide (-N=C
These include polyethylene, polypropylene, or a polyolefin obtained by copolymerizing ethylene with an α-olefin such as propylene or butene, or a diene such as butadiene, which has a functional group such as =NR) in the molecule. Among these, those containing acid anhydride, epoxy group, carboxyl group, hydroxyl group, and active methylol group are preferred.

These functional group-containing polyolefins can be obtained by known methods. For example, by radical copolymerizing a vinyl monomer having a functional group with ethylene, or by adding a functional group to a polyolefin such as polyethylene in an organic solvent or under melting. It can be obtained by a method of grafting containing vinyl monomers in the presence of a radical generator. These are also available as commercial products.

These functional group-containing polyolefins can also be used in combination with polyolefins that do not have functional groups. At this time, the weight ratio of the polyolefin having no functional group is 50% by weight or less based on the sum of the polyolefin having a functional group and the polyolefin having no functional group.

In the present invention, (A) a polyester resin containing an amino group in the molecule and (B) a polyolefin containing a functional group are mixed and reacted at a ratio of usually 80 to 20% by weight of (A) a polyester containing an amino group in the molecule. (B) 20 to 80 parts by weight of functional group-containing polyolefin. This is because outside these ranges, the effect of improving adhesion to substrates such as polyolefins and aromatic ring-containing polyesters is small.

The mixing reaction of both resins (A) and (B) is carried out at a temperature higher than the temperature at which both resins melt, and the temperature is usually 150°C to 300°C.
°C and is usually carried out in a Brabender plasticorder or extruder.

Moreover, it can also be carried out in an organic solvent such as toluene or xylene, if necessary.

The multilayer structure in the present invention is a resin composition layer obtained by reacting (A) a polyester resin containing an amino group in the molecule and (B) a polyolefin containing a functional group, on at least one side of which is a polyester containing an aromatic ring. Or it has a polyolefin resin layer. Therefore, when the resin composition of the present invention is referred to as X, it means a multilayer structure consisting of a combination of X/polyester, X/polyolefin, polyester/X/polyolefin, X/polyester/X/polyolefin, etc. There is no particular restriction on the thickness of each layer constituting a multilayer structure, but in the case of a multilayer film, it is usually 1 to 50 μm.
m is 0. In coextrusion using the resin composition of the present invention as an adhesive resin layer, it is usually thinner than other layer constituent components, and is 5 to 25 m.
Used in μm.

The aromatic ring-containing polyester used in the multilayer structure of the present invention is one represented by the general formula CI), which has an aromatic ring in the dicarboxylic acid or its ester and/or diol as a polyester forming component. It is. In particular, polyesters formed from aromatic dicarboxylic acids or esters thereof.

Examples of the polyolefin used in the multilayer structure of the present invention include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, and ethylene-vinyl acetate copolymer.

〔Example〕

EXAMPLES The present invention will be explained in more detail with reference to examples below, but the present invention is not limited to the following examples unless it exceeds the spirit thereof.

Reference example 1 7 in a glass polymerization tube equipped with stirring blades, nitrogen inlet, and pressure reduction port
0 g (0,360 mol) dimethyl terephthalate, 30
g (0,154 mol) of dimethyl isophthalate, and 6
2 g of ethylene glycol and 0.09 g of tetrabutoxytitanium were added and heated to 150°C, and the temperature was raised to 210°C over 1 hour and 30 minutes. During this time, methanol was distilled out.

Furthermore, 5.0 g (0,048 mol) of neopentyl glycol, 1.32 g (0,011 mol) of N-methyljetanolamine, and 0.03 g of tetrabutoxytitanium were added, and the mixture was reacted at 210°C for 30 minutes. I let it happen.

Thereafter, the pressure was gradually reduced, and the reaction temperature was also raised to 260° C. over 1 hour, and polymerization was carried out for 2 hours at a reduced pressure of 0.5-Hg.

Introduce nitrogen into the polymerization tube, return to normal pressure, stop polymerization,
The product was extracted from the bottom of the polymerization tube. The obtained polymer was light brown and transparent, and phenol/tetrachloroethane =
50150 (weight ratio) in solvent, concentration 0.5 g-i! −
', the logarithmic viscosity η1,1 at 30°C is 0.62
It was published by dl・g.

Reference Example 2 In a polymerization tube similar to that used in Reference Example 1, 10.3 g (0
,070 mol) of adipic acid, 39.1 g of carbon number 1
6 and 18 linear monoepoxy compounds (trade name AOE
X-68, manufactured by Daicel Corporation, those with general formula kill group and 16
(1:1 mixture of linear alkyl groups), 90.0 g
(0,354 mol) of bishydroxyethyl terephthalate was charged, heated to 230°C and reacted at normal pressure for 3.5 hours, and then 1.4 g (0,012 mol) of N-
Methyljetanolamine and 0.072 g of antimony trioxide were added, and the reaction was further carried out at 230°C for 1 hour. After that, the pressure was gradually reduced and the pressure was maintained at 0.3 Hg.
After polymerization for a period of time, nitrogen was introduced into the polymerization chamber and the pressure was returned to normal pressure.

The product could be extracted from the bottom of the polymerization tube, and the logarithmic viscosity η,0 of the obtained polymer was 0.48 d1·g (measurement conditions were the same as in Reference Example 1).

Reference Example 3 Into a polymerization tube similar to that used in Reference Example 1, 10.3 g (0.0
, 070 mol) of adipic acid, 39.1 g of a linear monoepoxy compound (trade name AOEX-68).

and 90.0 g (0,354 mol) of bishydroxyethyl terephthalate, heated to 230°C and reacted at normal pressure for 3.5 hours, and then 2.1 g (0,012 mol) of N-phenyl diethanolamine and 0,072
Add 1 g of antimony trioxide and further heat at 230°C.
Allowed time to react. After that, the pressure was gradually reduced to 0.3 KHg.
After maintaining the temperature for 4 hours, nitrogen was introduced into the polymerization tube to return it to normal pressure. The product can be extracted from the bottom of the polymerization tube, and the logarithmic viscosity η, □ of the obtained polymer is 0.44 dl·g-' (
The measurement conditions were the same as in Reference Example 1).

Reference Example 4 Into a polymerization tube similar to that used in Reference Example 1, 5.74 g (0.0
,039 mol) of adipic acid, 50.0 g (0°197
mol] of bishydroxyethyl terephthalate, and 2
1.7 g of a linear monoepoxy compound (trade name AOEχ
-68) was charged, heated to 230°C, and reacted at normal pressure for 3.5 hours. Then 0.78 g of N,N'-bis-2
-hydroxyethyl-2-methylpiperazine and 0.41
g of tetrabutoxytitanium and 0.04 g of antimony dioxide were added, the pressure was gradually reduced, and the reaction was allowed to proceed for 4 hours while maintaining the pressure at 0.3 mHH. The product can be extracted from the bottom of the polymerization tube, and the logarithmic viscosity η1llk of the obtained polymer is 0.4.
B d·g-' (measurement conditions were the same as in Reference Example 1).

Reference Example 5 Into a polymerization tube similar to that used in Reference Example 1, 10.3 g (0.0
, 070 mol) of adipic acid, 39.1 g of a linear monoepoxy compound (trade name AOEX-68), and 90.
0 g (0,354 mol) of bishydroxyethyl terephthalate was charged, heated to 230° C., and reacted at normal pressure for 3.5 hours. Next, 0.072 g of antimony trioxide was added, and the pressure was gradually reduced and maintained at 0°3 m Hg for 4 hours. After that, nitrogen was introduced into the polymerization tube to restore the pressure to 1.6
g (0,012 mol) of p-aminobenzoic acid was added thereto, the pressure was reduced again, and the reaction was allowed to proceed for 1 hour. The product can be extracted from the bottom of the polymerization tube, and the logarithmic viscosity of the obtained polymer is
5. ．． is 0.51 dl・g-' (measurement conditions are Reference Example 1)
).

Reference Example 6 A polymer was obtained in exactly the same manner as in Reference Example 1 except that N-methyljetanolamine was not used.

The obtained polymer was pale yellow and transparent, and had a logarithmic viscosity of η1. was 0.65 dl·g-' (measurement conditions were the same as in Reference Example 1).

Example 1 25g of polyester obtained in Reference Example 1 and 42QOpp
s acid anhydride-containing polyolefin (trade name: Tubatic@
AP-7307, manufactured by Mitsubishi Kasei ■) was placed in a Brabender plasticorder set at 240°C, and
The mixture was kneaded for 5 minutes at rpm for 2 reactions. The resulting composition was a pale yellow-white solid at room temperature. This composition was heated at 240°C.
After heat pressing to form a film with a thickness of about 100 μm, the film was sandwiched between a low density polyethylene film and a polyethylene terephthalate film, and heated again at 200°C for 2 minutes.

A multilayer film was obtained by hot pressing at a pressure of 10 kg-cm-''.

The obtained multilayer film was cut into a short shelf shape with a width of 10 cm.
When the T-peel adhesive strength was measured, it was 1.4 dazzle・C1l
-' was.

Examples 2 to 5 25 g of polyester obtained in Reference Examples 2 to 5 and acid anhydride-containing polyolefin (trade name Tubachik AP-730)
T) 25 g was placed in a Brabender plasticorder set at 210°C and mixed for 5 minutes at 30 rpm.
Made me react. The resulting composition was a pale yellow-white solid at room temperature. This composition was heat-pressed at 200°C and approximately 10
After forming a film with a thickness of 0 μm, it was sandwiched between a low-density polyethylene film and a polyethylene terephthalate film, and heated again at 200°C for 2 minutes (Jkg-c
A multilayer film was obtained by hot pressing at a pressure of m-''. The T!-IJgI strength of the second film was measured in the same manner as in Example 1, and the results are shown in Table 1.

Table 1 Example 6 25 g of polyester obtained in Reference Example 2, glycidyl group-containing polyethylene (trade name: Rexval@RA3050)
Kneading 1 reaction was carried out in the same manner as in Example 2, except that 5 g of polyethylene having no functional group (trade name: Tsubachik@, VF-230, manufactured by Mitsubishi Kasei ■) was used. A multilayer film was obtained from the resulting composition in the same manner as in Example 1, and the T peel strength was measured, and it was found to be 0.8.
It was about 1 kg-C1l.

Examples 7 to 10 25 g of the polyester obtained in Reference Examples 2 to 5 and carboxyl group-containing polyethylene (trade name Nucrel 0410,
A multilayer film was obtained in the same manner as in Example 2 except that 25 g of the film (manufactured by Mitsui Davon Co., Ltd.) was used, and its T-peel strength was measured, and the results were as shown in Table 2.

Table 2 Comparative Example 1 25 g of polyester obtained in Reference Example 6 and acid anhydride-containing polyolefin (trade name Tubatic@AP-730)
A multilayer film was obtained in the same manner as in Example 2 except that T) was used. The T peel strength of the film is 0.14cg
-CI-'.

Comparative Example 2 Linear polyester containing no amino groups (trade name Vylon@200) instead of the polyester obtained in Reference Example 2
A mixed reaction was carried out in the same manner as in Example 2 except that . A multilayer film was obtained in the same manner as in Example 2, and the T peel strength was measured to be 0°1 kg-cm-'.

〔Effect of the invention〕

The resin composition of the present invention is useful as an adhesive resin for multilayer structures, and the resulting multilayer structure with aromatic ring-containing polyester and/or polyolefin resins is useful as packaging materials and the like.

In addition, the resin composition of the present invention can be used as a modifier for various plastics, a polymer alloy, a compatibility improver for polymer alloys,
It can also be used for applications such as adhesives.

Claims (2)

[Claims] (1) (A) A polyester resin containing an amino group in the molecule or a polyester resin containing an amino group in the molecule and having at least one hydroxyl group or carboxyl group in the molecule, and (B) a hydroxyl group in the molecule. or carboxyl group,
Or a resin composition obtained by reacting a polyolefin having a functional group capable of reacting with an amino group. (2) (A) A polyester resin containing an amino group in the molecule, or a polyester resin containing an amino group in the molecule and having at least one hydroxyl group or carboxyl group in the molecule; (B) It is characterized by having an aromatic ring-containing polyester or polyolefin resin layer on at least one side of a resin composition layer obtained by reacting a polyolefin having a functional group capable of reacting with a hydroxyl group, a carboxyl group, or an amino group. Multilayer structure.