JPH07290643A - Resin coated metal panel and drawn/squeezed can or drawn can composed thereof - Google Patents

Abstract

PURPOSE:To provide a resin coated metal panel coated with a resin excellent in drawing/squeezing or drawing moldability, the close adhesiveness with a metal panel and impact resistance, free from a pinhole and excellent in flavor properties and a drawn/squeezed can or drawn can formed from the resin coated metal panel. CONSTITUTION:A resin coated metal panel consists of a metal panel and the resin compsn. film provided on the single surface or both surfaces of the metal panel and the resin compsn. film consists of 50-95 pts.wt. of a saturated polyester resin [A], 1-30 pts.wt. of a polyester elastomer [B] and 1-25 pts.wt. of an ionomer resin [C]. A drawn/squeezed can or drawn can is formed from the above mentioned resin coated metal panel.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin-coated metal plate and a squeezing ironing can or a squeezing can comprising the same, and more particularly to a resin-coated metal plate coated with a specific resin composition and a squeezing ironing can or a squeezing can comprising the same. Regarding cans.

[0002]

BACKGROUND OF THE INVENTION Conventionally, a drawn and ironed can (hereinafter referred to as DI can) or a drawn can (hereinafter referred to as DRD can) obtained by drawing and ironing a steel plate such as a tin plate or an aluminum plate is a seam. It is widely used because of its excellent physical properties.

In such DI cans and DRD cans, in order to prevent deterioration of taste, deterioration of flavor, alteration of contents and generation of pinholes due to metal elution from a metal plate, the inner surface of the can is prevented. A resin layer may be provided.
As such a can having a resin layer provided on the inner surface side of the can and a resin-coated metal plate capable of forming the can, for example, JP-A-51-130647 discloses a steel plate coated with a saturated polyester layer and a steel plate coated with the saturated polyester layer. A container is proposed. Further, JP-A-1-180336 proposes a steel sheet coated with a polybutylene terephthalate layer, and JP-A-1-192545 and JP-2-5-5.
7339 and JP-A-3-10835 propose a steel sheet coated with a specific saturated copolyester layer and a container obtained from the steel sheet.

By the way, the coating resin used for the steel sheet for drawn and ironed cans is required to have excellent formability capable of following the drawn and ironing work and the drawing work, and at the same time, has excellent adhesiveness so as not to be peeled from the steel sheet. Required. Further, this resin is required to have excellent impact resistance capable of withstanding impacts during canning, canning process and transportation. Further, it is required that there be no pinhole that causes corrosion during storage and that the taste of the beverage is not affected, that is, that the flavor is excellent.

However, the resin coated on the conventional steel sheet for cans does not always satisfy such requirements. For example, pinholes may occur in the resin coating during drawing and ironing or drawing. Moreover, the impact resistance of the cans that have been heated in the processes such as drying, printing, and baking after the cans may decrease.

In order to improve the impact strength of such a saturated polyester resin, a method of blending a saturated polyester resin with a polycarbonate, a maleic acid-modified ethylene propylene random copolymer or the like is generally known. . However, any of these resin blends becomes stiff and brittle when annealed, and the impact strength is not sufficient.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and is excellent in drawing ironing or drawing formability, excellent adhesion to a metal plate and excellent impact resistance. A resin-coated metal plate that has no pinholes and is coated with a resin that has characteristics such as excellent flavor.
It is also an object of the present invention to provide a drawn and ironed can or a drawn can formed from such a resin-coated metal plate.

[0008]

SUMMARY OF THE INVENTION A resin-coated metal plate according to the present invention comprises a metal plate and a resin composition coating film provided on one or both sides of the metal plate, and the resin composition coating film is saturated with [A]. Polyester resin; 50 to 95 parts by weight, [B] polyester elastomer; 1 to 30 parts by weight, and [C] ionomer resin; 1 to 25 parts by weight.

These [A], [B] and [C] are

[0010]

[Equation 2]

It is preferable that The squeezed ironing can or the squeezed can according to the present invention is made of the resin-coated metal plate as described above.

[0012]

DETAILED DESCRIPTION OF THE INVENTION A resin-coated metal plate according to the present invention and a drawn and ironed can or a drawn can formed from such a resin-coated metal plate will be described below.

The resin-coated metal plate according to the present invention comprises a metal plate and a resin composition coating film provided on one side or both sides of the metal plate. In the present invention, conventionally known metals that are generally used for cans are widely used as the metal plate, and specifically, a steel plate (tin plate) or tin whose surface is Sn (tin) plated by a known method. None steel plate (tin-free steel, electrolytic chromic acid treated steel plate) or aluminum plate is used.

This metal plate usually has a thickness of 0.01-5.
mm, preferably 0.1 to 2 mm. A resin composition comprising [A] saturated polyester resin, [B] polyester elastomer, and [C] ionomer resin is coated on one side or both sides of the metal plate.

[A] Saturated Polyester Resin The [A] saturated polyester used in the present invention is a dicarboxylic acid such as terephthalic acid or its ester derivative (eg, lower alkyl ester, phenyl ester, etc.), and ethylene glycol or its ester derivative ( (For example, monocarboxylic acid ester ethylene oxide)
It is formed from a constitutional unit derived from a dihydroxy compound such as.

The saturated polyester may contain a constitutional unit derived from another dicarboxylic acid and / or another dihydroxy compound in an amount of 40 mol% or less. Specific examples of the dicarboxylic acid other than terephthalic acid include aromatic dicarboxylic acids such as phthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenoxyethanedicarboxylic acid; adipic acid, sebacic acid, azelaic acid, decanedicarboxylic acid. Aliphatic dicarboxylic acids such as acids; alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid and the like.

Dicarboxylic acids other than these terephthalic acids may be used as their ester derivatives. Specific examples of the dihydroxy compound other than ethylene glycol include trimethylene glycol (propylene glycol), tetramethylene glycol, neopentyl glycol, hexamethylene glycol, dodecamethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene. Aliphatic glycols such as glycols; alicyclic glycols such as cyclohexanedimethanol; bisphenols, hydroquinone, and aromatic diols such as 2,2-bis (4-β-hydroxyethoxyphenyl) propane.

These dihydroxy compounds may be used as their ester derivatives. The [A] saturated polyester resin used in the present invention contains a small amount of a structural unit derived from a polyfunctional compound such as trimesic acid, pyromellitic acid, trimethylolethane, trimethylolpropane, trimethylolmethane, and pentaerythritol, for example, It may be contained in an amount of 2 mol% or less.

Such [A] saturated polyester resin is substantially linear, which is confirmed by the fact that the saturated polyester is dissolved in o-chlorophenol. The saturated polyester resin used in the present invention is o-
Intrinsic viscosity [η] measured at 25 ° C in chlorophenol
Is usually 0.5 to 1.4 dl / g, preferably 0.5 to
1.3 dl / g, more preferably 0.6-1.2 dl / g
Is desirable.

Saturated polyester (a) having such an intrinsic viscosity [η] is preferable because it is excellent in melt moldability and draw-ironing moldability as well as mechanical strength such as impact resistance.

The [A] saturated polyester resin used in the present invention usually has a glass transition temperature (Tg) of 50 to 12.
It is desirable that the temperature is 0 ° C, preferably 60 to 100 ° C. This (a) saturated polyester resin may be amorphous or crystalline, and when it is crystalline, its crystal melting temperature (Tm) is usually 210 to 265 ° C., preferably 220 to 260 ° C, low temperature crystallization temperature (Tcc)
Is usually 110 to 210 ° C., preferably 120 to 200
It is desirable that the temperature is ° C.

[B] Polyester Elastomer As the [B] polyester elastomer used in the present invention, conventionally known polyester elastomers can be used without limitation, but the polyester elastomer is crystalline and has a high melting point. A thermoplastic elastomer having a hard segment and a soft segment, wherein the hard segment comprises (i) an aromatic polyester and the soft segment comprises (ii) a polyether or (iii) an aliphatic polyester [B-1 ] Polyester / polyether block copolymer or [B-
2] A polyester / polyester block copolymer is desirable.

[B-1] polyester / polyether block copolymer or [B-2] polyester.
The polyester block copolymer can be obtained by co-condensing (i) an aromatic polyester with (ii) a polyether or (iii) an aliphatic polyester by a known method.

It forms the [B-1] polyester / polyether block copolymer or the [B-2] polyester / polyester block copolymer used in the present invention.
The (i) aromatic polyester segment is composed of a constitutional unit derived from an aromatic dicarboxylic acid and a dihydroxy compound.

Specific examples of the aromatic dicarboxylic acid include:
Examples thereof include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid and diphenyldicarboxylic acid. These may be a combination of two or more kinds.

Specific examples of the dihydroxy compound include ethylene glycol, trimethylene glycol (propylene glycol), tetramethylene glycol, pentamethylene glycol, neopentyl glycol, 2,
Examples thereof include aliphatic dihydroxy compounds such as 2-dimethyltrimethylene glycol, hexamethylene glycol, dodecamethylene glycol, aromatic dihydroxy compounds such as p-xylene glycol, and alicyclic dihydroxy compounds such as cyclohexanedimethanol. These are 2
It may be a combination of two or more species.

(I) The aromatic polyester segment may be a homopolyester of terephthalic acid and one alkylene glycol, and either one of the dicarboxylic acid component and the dihydroxy component is composed of two or more kinds, or A copolyester composed of two or more types of both components may be used.

It forms the [B-1] polyester / polyether block copolymer and the [B-2] polyester / polyester block copolymer used in the present invention.
(i) The aromatic polyester segment comprises a dicarboxylic acid component containing terephthalic acid in an amount of 50 mol% or more and a carbon number of 2 when the dicarboxylic acid component is 100 mol%.
It is preferably formed from a dihydroxy component consisting of alkylene glycol of 10 to 10.

[B-1] The polyester segment forming the polyester / polyether block copolymer (ii) is formed of poly (alkylene oxide) glycol having a molecular weight of 300 to 6000. Specific examples of such poly (alkylene oxide) glycols include polyethylene glycol, polypropylene glycol, and polybutylene glycol.

The aliphatic polyester segment (iii) forming the polyester-polyester block copolymer [B-2] has an aliphatic dicarboxylic acid component and 2 to 2 carbon atoms.
It is composed of a structural unit derived from 10 alkylene glycols.

Specific examples of the aliphatic dicarboxylic acid include:
Examples thereof include adipic acid, sebacic acid, azelaic acid and decanedicarboxylic acid. Specific examples of the alkylene glycol having 2 to 10 carbon atoms include those shown above as the (i) dihydroxy compound forming the aromatic polyester segment.

[C] Ionomer Resin As the [C] ionomer resin used in the present invention,
Although a conventionally known ionomer resin is widely used, this ionomer resin is an ion in which a part or all of carboxyl groups in a copolymer of ethylene and α, β-unsaturated carboxylic acid is neutralized with a metal cation. It is a natural salt.

As the α, β-unsaturated carboxylic acid,
Unsaturated carboxylic acids having 3 to 8 carbon atoms, specifically acrylic acid, methacrylic acid, maleic acid, itaconic acid, maleic anhydride, maleic acid monomethyl ester, maleic acid monomethyl ester and the like can be mentioned.

With such ethylene and unsaturated carboxylic acid
Cations Neutralizing Carboxyl Groups in Copolymers of Polystyrene
Specifically, Na⁺, K⁺, Li⁺, Zn⁺,
Zn ⁺⁺, Mg⁺⁺, Ca⁺⁺, Co⁺⁺, Ni⁺⁺, Mn⁺⁺, P
b⁺⁺, Cu⁺⁺And monovalent divalent metal cations such as
It In addition, the residual carboxylate not neutralized with metal cations
Some of the silyl groups are esterified with lower alcohols
May be.

The [C] ionomer resin used in the present invention is a metal salt of a copolymer of ethylene and an unsaturated carboxylic acid as described above. The ethylene / unsaturated carboxylic acid for forming the metal salt is used. The copolymer with is a structural unit derived from ethylene in an amount of 80 to 99 mol%, preferably 85 to 98 mol%, and a structural unit derived from an unsaturated carboxylic acid (a structural unit having a carboxyl group). 1
-20 mol%, preferably 2-15 mol%.

In the [C] ionomer resin used in the present invention, some or all of the carboxyl groups in the copolymer of ethylene and unsaturated carboxylic acid, specifically 15 to
100% of the carboxyl groups are neutralized. The degree of neutralization is preferably 20 to 80%, more preferably 30.
The composition formed from the [C] ionomer resin having such a neutralization degree is excellent in melt extrudability.

Specific examples of such a [C] ionomer resin include a copolymer of ethylene and an unsaturated monocarboxylic acid such as acrylic acid or methacrylic acid, or an unsaturated ethylene and maleic acid or itaconic acid. Examples thereof include ionomer resins in which a part or all of the carboxyl groups in the copolymer with a dicarboxylic acid are neutralized with a monovalent or divalent metal ion such as sodium, potassium, lithium, zinc, magnesium or calcium.

Of these, 30 to 30% of the carboxyl groups in the copolymer of ethylene and acrylic acid or methacrylic acid (2 to 15 mol% of the structural unit having a carboxyl group)
70% of which is neutralized with a monovalent metal ion such as Na is preferably used.

As these ionomer resins, commercially available products such as "Himilan" (trade name: manufactured by Mitsui DuPont Polychemical Co., Ltd.) can be used. Resin composition In the present invention, the resin composition coated on the metal plate,
When the total amount of the above [A] saturated polyester resin, [B] polyester elastomer and [C] ionomer resin is 100 parts by weight, 50 to 95 parts by weight, preferably 60 parts by weight of [A] saturated polyester resin. ~ 90 parts by weight of the polyester elastomer [B] 1 to 30
The amount of the [C] ionomer resin is 1 to 25 parts by weight, preferably 5 to 20 parts by weight, in an amount of 1 to 20 parts by weight.

A coating composed of a resin composition containing the saturated polyester resin [A], the polyester elastomer [B], and the ionomer resin [C] in the above amounts is excellent in impact resistance and adheres well to a metal plate. It exhibits excellent moldability and exhibits excellent formability capable of following extrusion molding and drawing ironing or drawing, and forms a uniform film without pinholes after drawing ironing or drawing.

In the resin composition comprising the above components, the amount of [B] polyester elastomer is 1
If it is less than parts by weight, the [A] saturated polyester resin and the [C] ionomer resin are not sufficiently compatible with each other, so that a film in which pinholes, gels or the like are generated may be formed, and the impact strength of the film may be increased. May be insufficient. On the other hand, when the amount of the [B] polyester elastomer exceeds 30 parts by weight, the resin film can be formed without generating pinholes, but the flavor property is significantly deteriorated.

When the amount of the [C] ionomer resin is less than 1 part by weight, a film having poor adhesion to a metal plate and poor impact strength may be formed. On the other hand, when the amount of the [C] ionomer resin exceeds 25 parts by weight, the compatibility with other components decreases, and surging occurs during extrusion molding, which makes it difficult to form a film having a uniform thickness. .

In the present invention, the resin composition coated on the metal plate is formed from the components [A], [B] and [C] in the above-mentioned amounts, but in particular,

[0044]

[Equation 3]

0.05-0.3, preferably 0.10-0.2
5 is desirable. When the weight ratio shown above is less than 0.05, the coating film has good adhesion to the metal plate,
The impact strength may be inferior, while if it exceeds 0.3, the flavor property may be significantly deteriorated, and gel may be generated during extrusion molding.

Resin-Coated Metal Plate The resin-coated metal plate according to the present invention can be produced by coating the resin composition as described above on one surface or both surfaces of the metal plate by a known composite material laminating method. The method is not particularly limited. Specifically, it is performed as follows, for example.

(1) [A] saturated polyester resin and [B]
The polyester elastomer and the [C] ionomer resin are mixed by a tumbler blender, a Henschel mixer, a V-type blender, etc., and then melt-mixed by an extruder, a kneader Banbury mixer, etc., and then an extruder or gear pump having a T-die at the tip. A metal plate can be coated by quantitatively extruding with.

(2) [A] saturated polyester resin and [B]
The polyester elastomer and the [C] ionomer resin may be mixed by a tumbler blender, a Henschel mixer, a V-type blender, or the like, and then directly extruded quantitatively with an extruder having a T die or a gear pump to coat the metal plate. it can.

(3) [A] saturated polyester resin and [B]
A resin composition composed of a polyester elastomer and an [C] ionomer resin may be once formed into a film, and then the film may be attached to a metal plate.

When a metal plate is coated with the resin composition as described above, the resin composition extruded in a molten state from the extruder and coated on the metal plate is rapidly cooled to crystallize the resin composition. It is preferable to prevent it.

The thickness of the resin composition layer thus coated is usually 5 to 500 μm, preferably 10 to 100 μm.
m, particularly preferably 20 to 60 μm. The resin-coated metal plate according to the present invention is composed of the metal plate as described above and the resin composition coating film provided on one side or both sides thereof, and has excellent impact resistance and drawing ironing and drawing formability. It has excellent moldability and can be processed uniformly without forming pinholes in the coating during molding. In addition, this resin composition has excellent adhesion to a metal plate and excellent processing followability during molding, so that a can having an excellent appearance can be obtained.

The drawn and ironed can or the drawn can according to the present invention is formed by drawing and ironing or drawing the above resin-coated steel sheet such that the resin composition coating is on the inner surface side.

Squeeze iron can (DI can) or squeeze can (D
As a method for producing the RD can, various known methods can be adopted. The most general method is to manufacture a resin-coated steel sheet by ironing it in one step or several steps using an ironing punch.

For example, the drawing and ironing process can be performed under the following conditions. Plank diameter: 120-150 mm Drawing condition: 1-step drawing ratio H / D = 20-40 / 70
〜95mmφ 2-stage drawing ratio H / D = 30-60 / 50-80mmφ Squeeze ironing diameter ・ ・ ・ 3 stage inning 50-80mmφ Total ironing rate ・ ・ ・ 60-80%

[0055]

The resin-coated metal sheet according to the present invention is excellent in adhesion between the resin and the metal sheet, excellent in draw ironing and ironing formability or draw formability, and excellent in resin followability during molding process. And can form a can having an excellent appearance.

Further, the squeezed ironing can or squeezed can according to the present invention has excellent impact resistance capable of withstanding impacts during canning, canning process and transportation, and after drying, printing, baking, etc. Even if it is heated in the process of 1, it retains excellent impact resistance.

The squeezed ironing can or squeezed can according to the present invention does not have pinholes and is excellent in long-term storage stability of the contents and also in storage properties such as scent and flavor of the contents.

[0058]

EXAMPLES Next, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

[0059]

Examples 1 to 13 A saturated polyester resin as shown in Table 1, a polyester elastomer, and an ionomer resin were supplied to an extruder in the amounts shown in Table 1 to obtain resin compositions.

A steel plate having Sn plating of 2.8 g / m ^{2 on} each side (plate thickness 0.30 mm, hardness T-1)
The resin composition as described above was coated on one side of the Sn plating layer (corresponding to the above) with an extrusion T die at a thickness of 30 μm. At this time, the resin melting temperature in the T die is 265 to 30.
It was 0 degreeC, and the steel plate temperature at the time of coating was 150-200 degreeC. Further, the steel sheet coated with the resin by the T die was rapidly cooled to 100 ° C. or lower within 10 seconds.

Intrinsic viscosity [dl / g] of the saturated polyester resin as a raw material, and Tg (glass transition temperature), Tm (melting point) and Tcc of a resin composition comprising the saturated polyester resin, polyester elastomer and ionomer resin.
(Low temperature crystallization temperature), QTcc (cooling crystallization heat), QT
m (heat of fusion) is shown in Table 1.

Tg, Tm, Tcc, QTcc, QTm
Is 10 ° C using a differential thermal analyzer (Perkin Elmer-7 type)
It was measured at a temperature rising rate of / min. Cold crystallization heat [J / g]
Is 10 ° C using a differential thermal analyzer (Perkin Elmer-7 type)
The heating value due to crystallization observed when measured at a heating rate of 1 / min, and the heat of fusion [J / g] was increased by 10 ° C / min using a differential thermal analyzer (Perkin Elmer-7 type). It is the amount of heat absorbed by the melting of the resin observed when measured at the temperature rate.

The resin-coated steel sheet at room temperature thus obtained was subjected to drawing and ironing processing under the following molding conditions so that the inner surface of the can became the resin-coated surface to obtain a drawn and ironed can (DI can). Manufactured. The inner surface of the obtained DI can was washed and dried in an oven at 210 ° C. for about 2 minutes. Furthermore, the outer surface of the can was painted and baked.

<Molding conditions> 1. Resin temperature just before drawing and ironing: normal temperature 2. Plank diameter: 137 mm 3. Aperture conditions: One-stage aperture ratio H / D = 33/86 mmφ Two-stage aperture ratio H / D = 50/65 mmφ 4. Ironing punch diameter: 3-stage ironing 65.5 mmφ 5. Total ironing ratio: 70.5% The obtained DI cans were subjected to the following pinhole test, impact resistance test, adhesion test, flavor property evaluation, and extrusion laminate moldability evaluation. The results are shown in Table 2.

<Pinhole Test on Inner Surface of Resin (Resin-Coated Surface)> The obtained DI cans were tested for the presence or absence of pinholes by conducting the following copper sulfate test.

A chemical plating solution of Cu containing 20 g / l of sulfuric acid and 50 g / l of copper sulfate (CuSO ₄ .7H ₂ O) was placed in a can and left for 10 minutes to remove the solution, washed with water, and then deposited. Cu was observed. If there is a lack (pinhole) in the resin layer inside the can, iron will elute from the lack,
Cu is displacement plated.

<Evaluation of Impact Resistance of Resin Composition Coating> (i) Post-Impact Current Test Assuming that the can is heated by a drying, printing, baking process or the like after the can is manufactured, the resin is treated as follows. After heating the coated steel sheet, a post-impact current test was performed.

After heating the resin-coated steel sheet in an oven at 210 ° C. for 10 minutes, it was cooled to room temperature, and a 2.0 kg iron ball was dropped from a height of 30 cm from the steel sheet side not coated with the resin composition. After making the steel plate the bottom such that the convexly swollen side is the upper surface and forming a wall of soft steel-like resin at the end of the steel plate, add 1.0% saline to the convexly swollen side,
Current value (mA) that flows when a voltage of + 6V is applied with a steel plate as the anode and platinum installed near the bulge as the cathode
Was measured.

(Ii) Adhesion Test The adhesion of the resin for coating the inner surface of the can to the Sn-plated steel sheet was evaluated as follows. After soaking the resin-coated steel sheet at room temperature in an aqueous solution of 1.5% by weight citric acid and 1.5% by weight sodium chloride (UCC solution) for 24 hours, measure the peeled length of the film, and measure the length (mm). evaluated.

0.0 mm was marked with ⊚, 0.0 to 0.5 was marked with ◯, 0.5 to 2.0 was marked with Δ, and 2.0 to was marked with x. <Evaluation of flavor> DI obtained as described above
The can was filled with 5% ethanol and 20 ppm limonene solution and left at 20 ° C. for 10 minutes. The amount of limonene adsorbed on the film was compared with that when the upper layer was formed of homopolyethylene terephthalate as 100. The evaluation criteria of flavor property are as follows.

◯ ... less than 70 Δ ... 70 or more and less than 100 × ... 100 or more <Evaluation of extrusion laminate moldability> As described above, the resin composition was subjected to T-die extrusion lamination (resin temperature: 265 to 300).
(° C), the moldability was evaluated.

∙ Can be molded without problems ×… Gels and spots are generated. Or the extruded state is not stable in the width direction (surging).

[0073]

Comparative Examples 1 to 4 Resin-coated steel sheets were obtained in the same manner as in the examples, except that the resin compositions shown in Table 1 were used instead. Intrinsic viscosity [dl / g] of saturated polyester resin as raw material and Tg, Tm, Tc, Q of resin composition
Table 1 shows Tc and QTm.

The resin-coated steel sheet at room temperature thus obtained was
In the same manner as in Example 1, the inner surface of the can was drawn and ironed so that the inner surface of the can became the resin-coated surface.
Cans) were manufactured. The obtained DI can was tested and evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0075]

[Table 1]

[0076]

[Table 2]

[0077][A] Saturated polyester resin * 1) Copolymerized polyester containing two or more dicarboxylic acid components
Stell TA… terephthalic acid, IA… isophthalic acid (dicarboxylic acid
The acid component is 100 mol%) * 2) Copolymerized polyester containing two or more dihydroxy components
Stell EG ... Ethylene glycol, CHDM ... Cyclohexane
Dimethanol (100 mol% of dihydroxy compound component
* 3) Homo PET; terephthalic acid and ethylene glycol
With homopolyester [B] Polyester elastomer * 4) Hytrel 4057 (Toray DuPont); poly
Ester / polyether block copolymer Polyester segment; acid component / terephthalic acid, iso
Phthalic acid, glycol component / 1,4-butanediol, polyether segment; polybutylene oxide, * 5) decane diacid copolymerized polyester; polyester / polyester block copolymer acid component / terephthalic acid, decane diacid, glycol component /
1,4-butanediol,[C] Ionomer resin * 6) Ionomer resin; Himilan 1707 (Mitsui De
Upon Chemical Co., Na type) * 7) Ionomer resin; Himilan 1706 (Mitsui De)
(Zup type, manufactured by Upon Chemical Co., Ltd.)

[0078]

[Table 3]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08G 63/91 NLL C08L 67/02 LNZ C09D 167/02 PKZ // (C08L 67/02 23:26 )

Claims (6)

[Claims] 1. A metal plate and a resin composition coating film provided on one or both surfaces of the metal plate, wherein the resin composition coating film comprises [A] saturated polyester resin; 5
0 to 95 parts by weight, and [B] polyester elastomer;
1 to 30 parts by weight and [C] ionomer resin; 1 to 25
A resin-coated metal plate, comprising: 2. The [B] polyester elastomer is an aromatic compound derived from [B-1] (i) a dicarboxylic acid component containing 50 mol% or more of terephthalic acid and an alkylene glycol having 2 to 10 carbon atoms. A polyester / polyether block copolymer comprising a polyester segment and (ii) a polyether segment composed of poly (alkylene oxide) glycol having a molecular weight of 300 to 6000, or [B-1] (i) terephthalic acid An aromatic polyester segment derived from a dicarboxylic acid component containing 50 mol% or more of C, and an alkylene glycol having 2 to 10 carbon atoms, (iii) an aliphatic dicarboxylic acid component, and 2 to 10 carbon atoms.
The resin-coated metal sheet according to claim 1, which is a polyester / polyester block copolymer comprising an aliphatic polyester segment derived from the alkylene glycol. 3. The above [A], [B] and [C] are as follows: The resin-coated metal plate according to claim 1, wherein 4. The [C] ionomer resin is a copolymer of ethylene and an α, β-unsaturated carboxylic acid in which some or all of the carboxyl groups are neutralized with a monovalent or divalent metal cation. The resin-coated metal plate according to claim 1, wherein the resin-coated metal plate is a prepared ionic salt. 5. The resin-coated metal plate according to claim 1, wherein the metal plate is a steel plate or an aluminum plate. 6. A drawn ironing can or a drawn can obtained by drawing and ironing the resin-coated metal sheet according to claim 1 so that the resin coating surface faces the inner surface.