JP5478361B2 - Ionomer composition - Google Patents

Description

  The present invention relates to ionomer compositions.

It is known that an ionomer obtained by neutralizing a carboxylic acid group of an ethylene / unsaturated carboxylic acid copolymer with a metal ion is excellent in processability, transparency, metal adhesion, abrasion resistance, pinhole resistance, and the like. .
Utilizing these excellent properties, it has also been proposed that ionomers are used for sports goods such as packaging materials for foods and electronic parts, automobile parts, cosmetic containers, and golf balls.

In general, an antistatic agent is added to the polymer in order to suppress the charging of the polymer. Various surfactants are used as the antistatic agent.
As an antistatic agent for an ionomer, for example, a mixed component of an alkyl sulfonate and a polyoxyethylene alkyl ether is known (see, for example, Patent Document 1).

JP 2003-138071 A

By the way, the ionomer has different electrical properties depending on the metal used for neutralization.
For example, an ionomer neutralized with an alkali metal such as K, Cs, or Rb exhibits conductivity (that is, non-chargeability). The reason is considered to be that alkali metal ions have high water absorption, and ionomers neutralized with alkali metal ions easily absorb moisture, and as a result, alkali metal ions easily move in solid ionomers. .

On the other hand, an ionomer neutralized with a polyvalent metal such as zinc or magnesium has a property that it is very easily charged, and the charge is restrained by an ion cluster and is not easily discharged. For this reason, an ionomer neutralized with a polyvalent metal generates not only surface charging but also internal charging.
In this regard, the conventional mechanism for suppressing charging by a surfactant (antistatic agent) is a mechanism for releasing charges by orienting hydrophilic groups on the surface, which is effective for surface charging, but against internal charging. Is not very effective.

A mixed component of an alkyl sulfonate and a polyoxyethylene alkyl ether described in Patent Document 1 is said to exhibit a high antistatic effect on an ionomer as a kneading type antistatic agent.
However, further ionization is desired for ionomers neutralized with polyvalent metals.
Furthermore, the addition of an antistatic agent may cause fluctuations that increase or decrease the melt flowability (MFR; melt flow rate) of the ionomer. At the molding site, it is also desired to suppress such fluctuations as much as possible, or to change in an increasing direction that tends to improve molding processability even if fluctuations occur.

  The present invention has been made in view of the above, and an object of the present invention is to provide an ionomer composition that is excellent in non-chargeability and in which fluctuations in melt fluidity are suppressed, and to achieve the object.

Specific means for achieving the above object are as follows.
<1> (A) an ethylene / unsaturated carboxylic acid copolymer ionomer neutralized with zinc or magnesium , (B) an alkali metal salt , (C) an adipic acid compound that dissolves the component (B), containing the (B) is the component and the total content of the component (C), wherein (a) are four to 8 mass parts der respect to 100 parts by weight of the component, the content of the component (a) 80 to 98% by mass, and the component (B) is Li ⁺ , Na ⁺ , or K ⁺ , ClO ₄ ⁻ , CF ₃ SO ₃ ⁻ , (CF ₃ SO ₂ ) ₂ N ⁻ , or (CF ₃ SO ₂ ) ₃ C ^— and an ionomer composition in which the component (C) is a compound represented by the following general formula (1) .
<2> The ionomer composition according to <1>, wherein the mass of the component (C) is 1 to 1000 times the mass of the component (B).
<3> The ionomer composition according to <1> or <2>, wherein the polyvalent metal is zinc.

  ADVANTAGE OF THE INVENTION According to this invention, the ionomer composition which was excellent in non-charging property and the fluctuation | variation of the melt fluidity was suppressed can be provided.

  The ionomer composition of the present invention comprises (A) an ethylene / unsaturated carboxylic acid copolymer ionomer (hereinafter also referred to as “component (A)”) neutralized with a polyvalent metal, and (B) an alkali metal salt or An alkaline earth metal salt (hereinafter also referred to as “component (B)”) and (C) an adipic acid compound (hereinafter also referred to as “component (C)”) that dissolves the component (B). The total content of the component (B) and the component (C) is 0.001 to 10 parts by mass with respect to 100 parts by mass of the component (A).

Since the ionomer composition of the present invention has the above-described configuration, it is excellent in non-chargeability (that is, difficult to be charged), and fluctuations in melt fluidity are suppressed.
When the total content of the component (B) and the component (C) is less than 0.001 part by mass with respect to 100 parts by mass of the component (A), non-charging property, that is, not only surface charging but also internal charging When the total content of the component (B) and the component (C) exceeds 10 parts by mass with respect to 100 parts by mass of the component (A), an ionomer is formed inside the screw of the extruder. There is a possibility that the composition easily slips and the molding processability is lowered, the surface of the molded product becomes sticky and the surface of the molded product becomes sticky, or blocking is likely to occur when the film or sheet shape is used.
The total content of the component (B) and the component (C) is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the component (A) from the viewpoint of more effectively obtaining the effects of the present invention. 3-10 mass parts is preferable and 4-8 mass parts is especially preferable.
Hereinafter, each component of the ionomer composition of the present invention will be described.

<(A) Ethylene / unsaturated carboxylic acid copolymer ionomer neutralized with polyvalent metal>
The ionomer composition of the present invention contains (A) an ethylene / unsaturated carboxylic acid copolymer ionomer (component (A)) neutralized with a polyvalent metal.
Specifically, the component (A) is obtained by neutralizing part or all of the carboxylic acid group contained in the ethylene / unsaturated carboxylic acid copolymer (base polymer) with a polyvalent metal ion.

  Examples of the unsaturated carboxylic acid in the ethylene / unsaturated carboxylic acid copolymer (base polymer) include acrylic acid, methacrylic acid, fumaric acid, maleic acid, maleic anhydride, monomethyl maleate, and monoethyl maleate. Of these, acrylic acid or methacrylic acid is preferred.

The content of structural units derived from ethylene in the ethylene / unsaturated carboxylic acid copolymer is preferably 98 to 70% by mass, and more preferably 97 to 75% by mass.
The content of the structural unit derived from the unsaturated carboxylic acid in the ethylene / unsaturated carboxylic acid copolymer is preferably 2 to 30% by mass, and more preferably 3 to 25% by mass.

Moreover, 90 mol% or less is preferable, as for the neutralization degree in the said (A) component, 5-80 mol% is more preferable, and 10-70 mol% is especially preferable.
Here, the degree of neutralization is the ratio (moles) of carboxylic acid groups neutralized by polyvalent metal ions out of all carboxylic acid groups contained in the ethylene / unsaturated carboxylic acid copolymer (base polymer). %).
If the degree of neutralization is 90 mol% or less, ion aggregation can be moderately suppressed, a decrease in fluidity can be further suppressed, and moldability can be more suitably maintained.
Although there is no limitation in particular in the minimum of the said neutralization degree, 5 mol% is preferable from a viewpoint of exhibiting the performance as an ionomer more effectively.

Examples of the polyvalent metal include zinc and magnesium.
When zinc is used as the polyvalent metal, there is almost no change in melt fluidity due to the addition of the components (B) and (C) described below, and even if it occurs, the melt fluidity is improved. is there. Accordingly, zinc is particularly preferable as the polyvalent metal.

  Moreover, as a melt flow rate (190 degreeC, 2160g load) of the said (A) component, 0.01-100 g / 10min is preferable from a viewpoint of a moldability or a mechanical characteristic, 0.1-50 g / 10min. Is more preferable.

Further, the ethylene / unsaturated carboxylic acid copolymer may be a binary copolymer of ethylene and an unsaturated carboxylic acid, or ethylene and an unsaturated carboxylic acid may be used alone or in combination of two or more. A multi-component copolymer obtained by copolymerization with a monomer may be used.
Examples of the other monomers include vinyl esters such as vinyl acetate and vinyl propionate, methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, nbutyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, Examples thereof include unsaturated carboxylic acid esters such as methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, dimethyl maleate and diethyl maleate, carbon monoxide and sulfur dioxide.
In the ethylene / unsaturated carboxylic acid copolymer, the content of the structural unit derived from the other monomer is from the viewpoint of wear resistance, scratch resistance, and heat resistance when the ionomer composition is used. 0-10 mass% is more preferable, 0-5 mass% is still more preferable, and 0 mass% is especially preferable.

  The content of the component (A) in the ionomer composition of the present invention is preferably 80 to 98 mass%, more preferably 90 to 98 mass%, from the viewpoint of more effectively exhibiting the function as an ionomer.

<(B) Alkali metal salt or alkaline earth metal salt>
The ionomer composition of the present invention contains at least one (B) alkali metal salt or alkaline earth metal salt (component (B)).
Examples of the alkali metal cation or alkaline earth metal cation contained in the component (B) include Li ⁺ , Na ⁺ , K ⁺ , Mg ²⁺ , and Ca ²⁺ .
Among these, Li ⁺ , Na ⁺ and K ⁺ having a small ion radius are preferable, Li ⁺ and Na ⁺ are more preferable, and Li ⁺ (lithium ion) is particularly preferable.

Examples of the anion contained in the component (B) (alkali metal salt or alkaline earth metal salt) include Cl ⁻ , Br ⁻ , F ⁻ , I ⁻ , NO ₃ ⁻ , SCN ⁻ , ClO ₄ ⁻ and CF _3. SO ₃ ⁻ , BF ₄ ⁻ , (CF ₃ SO ₂ ) ₂ N ⁻ , (CF ₃ SO ₂ ) ₃ C ^{− and the} like can be mentioned.
Among these, ClO ₄ ⁻ , CF ₃ SO ₃ ⁻ , (CF ₃ SO ₂ ) ₂ N ⁻ , (CF ₃ SO ₂ ) ₃ C ⁻ is preferable, and ClO ₄ ⁻ , CF ₃ SO ₃ ⁻ , ( ^{_{CF 3 SO 2) 2 N -}} , (CF 3 SO 2) 3 C - is.

The component (B) is preferably lithium perchlorate LiClO ₄ , sodium perchlorate NaClO ₄ , magnesium perchlorate Mg (ClO ₄ ) ₂ from the viewpoint of more effectively suppressing the charging of the ionomer composition. , Potassium perchlorate KClO ₄ , lithium trifluoromethanesulfonate Li (CF ₃ SO ₃ ), bis (trifluoromethanesulfonyl) imide lithium Li · N (CF ₃ SO ₂ ) ₂ , potassium bis (trifluoromethanesulfonyl) imide K · N (CF ₃ SO ₂ ) ₂ , sodium bis (trifluoromethanesulfonyl) imide Na · N (CF ₃ SO ₂ ) ₂ , tris (trifluoromethanesulfonyl) methane lithium Li · C (CF ₃ SO ₂ ) ₃ , tris (trifluoro) Lomethanesulfonyl) methana A potassium _{Na · C (CF 3 SO 2} ) 3.
As the component (B), more preferably, lithium perchlorate LiClO ₄ , sodium perchlorate NaClO ₄ , lithium trifluoromethanesulfonate Li (CF ₃ SO ₃ ), bis (trifluoromethanesulfonyl) imide lithium Li · N ( CF ₃ SO ₂ ) ₂ , sodium bis (trifluoromethanesulfonyl) imide Na · N (CF ₃ SO ₂ ) ₂ , tris (trifluoromethanesulfonyl) methane lithium Li · C (CF ₃ SO ₂ ) ₃ and tris (trifluoromethanesulfonyl) ) Sodium methane Na.C (CF ₃ SO ₂ ) ₃
The component (B) is more preferably lithium perchlorate, sodium perchlorate, lithium trifluoromethanesulfonate, lithium bis (trifluoromethanesulfonyl) imide, or tris (trifluoromethanesulfonyl) methanelithium.

In the ionomer composition of the present invention, the upper limit of the content of the component (B) is preferably 9.99 parts by mass, more preferably 8 parts by mass with respect to 100 parts by mass of the component (A). Part by mass is particularly preferred.
In the ionomer composition of the present invention, the lower limit of the content of the component (B) is preferably 0.0001 parts by mass and more preferably 0.0003 parts by mass with respect to 100 parts by mass of the component (A). 0.01 parts by mass is particularly preferable.
If content of (B) component is more than the said lower limit, higher electroconductivity can be obtained and non-charging property can be improved more.
On the other hand, if content of (B) component is below the said upper limit, progress of crystallization, material deterioration, etc. can be suppressed more effectively.

<(C) Adipic acid compound that dissolves component (B)>
The ionomer composition of the present invention contains (C) at least one adipic acid compound (component (C)) that dissolves the component (B).
When the ionomer composition of the present invention contains the component (C), the solubility of the component (B) in the component (A) increases, and the alkali metal cation or alkaline earth in the component (B) Dissociation stability of the metal cation is increased, and as a result, non-chargeability in the ionomer composition is improved.
Here, “dissolve” means that the solubility at 25 ° C. is 10% by mass or more.

The component (C) preferably has a — {O (ZO) _n } — group (Z is an alkylene group having 2 to 4 carbon atoms, and n is an integer of 1 to 7), and all molecules. It is an adipic acid ester compound whose chain end is a CH ₃ group and / or a CH ₂ group.
The CH ₂ group at the end of the molecular chain has a carbon atom having a double bond.

Examples of the component (C) include alcohol obtained by adding 1 to 7 moles of alkylene oxide having 2 to 4 carbon atoms to 1 mole of linear or branched aliphatic alcohol having 1 to 9 carbon atoms, and adipic acid. And adipic acid ester compounds obtained by reacting and are suitable.
Such a compound can be produced by a general method for producing an ester compound.

  Here, as an example of the above-mentioned “alcohol obtained by adding 1 to 7 moles of alkylene oxide having 2 to 4 carbon atoms to 1 mole of linear or branched aliphatic alcohol having 1 to 9 carbon atoms”, 1 mole of propanol 1 to 7 mol of ethylene oxide, 1 to 4 mol of propylene oxide, or 1 to 3 mol of butylene oxide; an alcohol obtained by adding 1 to 6 mol of ethylene oxide or 1 to 3 mol of propylene oxide to 1 mol of butanol Alcohol obtained: Addition of 1 to 2 mol of ethylene oxide to 1 mol of hexanol; Addition of 1 to 5 mol of ethylene oxide, 1 to 3 mol of propylene oxide, or 1 to 2 mol of butylene oxide to 1 mol of pentanol The resulting alcohol; 1 mol of ethylene oxide to 1 mol of octanol, Alcohol obtained by adding 1 to 3 mol of propylene oxide or 1 to 3 mol of butylene oxide; adding 1 to 4 mol of ethylene oxide, 1 to 2 mol of propylene oxide, or 1 to 2 mol of butylene oxide to 1 mol of nonanol Alcohol obtained; and the like.

  Among these alcohols, 2- (2-butoxyethoxy) ethanol in which 2 mol of ethylene oxide is added to 1 mol of butanol, and 2-butoxyethanol in which 1 mol of ethylene oxide is added to 1 mol of butanol are considered to have processability. From the viewpoint of balance.

  The component (C) is more preferably an adipic acid ester compound having an alkyl group at the terminal and not a hydroxyl group.

  The component (C) is particularly preferably a compound represented by the following general formula (1).

  In the general formula (1), each Z independently represents an alkylene group having 2 to 4 carbon atoms, each R independently represents a linear or branched alkyl group having 1 to 9 carbon atoms, and n represents each Independently, it is an integer of 1 to 7.

  Of the compounds represented by the general formula (1), most preferred is dibutoxyethoxyethyl adipate (bis [2- (2butoxyethoxy) ethyl] adipate) represented by the following chemical formula (1-1).

As an upper limit of content of (C) component in the ionomer composition of this invention, 9.99 mass parts is preferable with respect to 100 mass parts of said (A) component, and 8 mass parts is more preferable.
The lower limit of the content of the component (C) in the ionomer composition of the present invention is not particularly limited, but is preferably 0.1 parts by mass with respect to 100 parts by mass of the component (A), 0.3 Part by mass is more preferable.
If the content of the component (C) is less than or equal to the above upper limit, the viscosity reduction of the ionomer composition can be more effectively suppressed, the moldability such as drawdown can be further improved, and the dimensional stability of the molded product can be further improved. It is possible to improve, and the deterioration of physical properties can be more effectively suppressed.
Moreover, it is preferable that (C) component is a liquid at room temperature (23 degreeC) from a viewpoint of handleability.

In the ionomer composition of the present invention, the mass of the component (C) is preferably 1 to 1000 times the mass of the component (B).
If the mass of (C) component is the said range, a bleeding will be suppressed more and more stable electroconductivity (non-charging property) can be obtained.
From the viewpoint of the above effect, the mass of the component (C) is more preferably 1 to 100 times the mass of the component (B), and 1 to the mass of the component (B). 10 times is particularly preferable.

<Other ingredients>
The ionomer composition of the present invention may contain other components other than those described above as long as the object of the present invention is not impaired.
Examples of other components include various additives and other polymers other than the component (A).

Examples of various additives include antioxidants, heat stabilizers, light stabilizers, UV absorbers, pigments, dyes, dispersion aids, lubricants, antiblocking agents, antifungal agents, antibacterial agents, flame retardants, flame retardants Auxiliaries, crosslinking agents, crosslinking aids, foaming agents, foaming aids, inorganic fillers, fiber reinforcements and the like can be mentioned.
For example, a dispersing aid such as a lubricant such as a higher fatty acid salt such as calcium stearate, an alkyl sulfonate, a polyoxyethylene alkyl ether, and a glycerin higher fatty acid (carbon number 12 to 22) ester for uniformly dispersing the lubricant. And so on. These can be added separately, or they can be mixed and added in advance.

As other polymers other than the component (A), other olefin / polar monomer copolymers other than the component (A) and polyolefins can be used.
Examples of the olefin in the other olefin / polar monomer copolymer include α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene, Particularly preferred is ethylene.
The other polar monomers in the olefin / polar monomer copolymer include vinyl esters such as vinyl acetate and vinyl propionate, methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, and n-butyl acrylate. , Glycidyl such as isooctyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, dimethyl maleate, diethyl maleate, glycidyl acrylate, glycidyl methacrylate Examples thereof include unsaturated epoxy monomers such as esters and glycidyl ethers such as vinyl glycidyl ether, carbon monoxide, and sulfur dioxide.
Such polar monomers may be not only one type but also a copolymer containing two or more types.

Examples of the polyolefin include homopolymers and mutual copolymers of α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 1-octene, 1-decene and 4-methyl-1-pentene. Those produced by various methods using various catalysts can be used.
The polyolefin preferably has a melting point of 200 ° C. or lower, particularly 180 ° C. or lower.
Examples of the polyolefin include high-pressure polyethylene, a copolymer of ethylene and an α-olefin having 3 or more carbon atoms (preferably 4 to 12 carbon atoms) (linear low density polyethylene), medium / high density polyethylene, propylene. Homopolymer, copolymer of propylene and C2-C12 α-olefin (hereinafter also referred to as “propylene / α-olefin copolymer”), poly-1-butene, poly-4-methyl-1 -Pentene, etc.

  As the olefin / polar monomer copolymer and the polyolefin, for example, the olefin / polar monomer copolymer and the polyolefin described in paragraph Nos. 0018 to 0032 of JP-A No. 2003-138071 are also suitable in the present invention. Can be used.

Since the ionomer composition of the present invention is excellent in melt fluidity, it is excellent in molding processability.
Therefore, the ionomer composition of the present invention can be easily processed into molded products having various shapes such as a sheet shape and a film shape by various molding methods such as extrusion molding, injection molding, compression molding, and hollow molding.
The molded product obtained using the ionomer composition of the present invention has good non-charging properties, abrasion resistance, scratch resistance, slipping properties, weather resistance, and the like.
The sheet-shaped or film-shaped molded body can be molded using, for example, an inflation film molding machine or a cast film / sheet molding machine.
A sheet-shaped or film-shaped molded body may have a single-layer structure or a structure having two or more layers.
Moreover, the sheet-shaped or film-shaped molded body may be laminated with an adhesive resin layer in order to improve the adhesion to various substrates.
A laminate of a sheet-shaped or film-shaped molded body and an adhesive resin layer can be formed using, for example, a coextrusion molding machine.

Examples of the adhesive resin in the adhesive resin layer include an ethylene / unsaturated carboxylic acid copolymer, an ethylene / unsaturated carboxylic acid / unsaturated carboxylic acid alkyl terpolymer, and an ethylene / unsaturated carboxylic acid alkyl ester copolymer. Examples thereof include at least one selected from a polymer, an ethylene / vinyl ester copolymer, and an ethylene / unsaturated carboxylic acid alkyl ester / carbon monoxide copolymer (single or blend).
In addition, the above-mentioned simple substance or blend may be further blended with polyolefin as exemplified as the other polymer.

Another example of the ionomer composition of the present invention is an example of molding (thermal bonding) on the surface of another substrate by extrusion coating.
Examples of the other substrate include various metal plates such as paper, various metal foils and steel plates, various polymers (for example, films and sheets such as polyolefin and polyvinyl chloride), woven fabrics, and non-woven fabrics.
In extrusion coating molding, the melt flow rate of each polymer component (component (A) and other polymers used as necessary) constituting the ionomer composition of the present invention and the blending ratio of each component are skillfully controlled. By doing so, it is possible to balance surface characteristics such as extrusion moldability, wear resistance, scratch resistance, and matte appearance.

When the ionomer composition of the present invention is formed on the surface of another base material by extrusion coating, the obtained molded product may have a single-layer structure or a two-layer structure.
In addition, from the viewpoint of adhesiveness to other substrates, the molded body can be molded via the above-described adhesive resin layer.

  The ionomer composition of the present invention described above is excellent in non-chargeability and has suppressed decrease in melt fluidity. For example, packaging materials for food and electronic parts, automobile parts, cosmetic containers, handrails, It can be suitably used for producing various molded articles (members, containers, films, sheets, etc.) such as building materials such as blocks, sports goods such as golf balls, park golf clubs, and putter bag cases.

  Hereinafter, the present invention will be described more specifically with reference to experimental examples, but the present invention is not limited to the following examples.

[Experimental Example 1]
<< Preparation of ionomer compositions (Sample 1 to Sample 8) >>
The component (A) and additives shown in Table 1 below were used in a lab plast mill kneader (a twin screw manufactured by Toyo Seiki Co., Ltd.) so as to have the amounts shown in Table 1 below. ^The mixture was mixed for 10 minutes under the condition of ⁻¹ to obtain ionomer compositions (Sample 1 to Sample 8).

In Table 1 below, the “A” column indicates the component (A), and the “mass ratio [A / left additive]] column indicates the (A) component and the additive (the following B-1 or B-2). The mass ratio is shown.
The details of the component (A) and additives shown in Table 1 below are as follows.
In the following, the amount of methacrylic acid and the amount of ethylene represent the content of structural units derived from methacrylic acid and the content of structural units derived from ethylene, respectively.

<(A) component>
A-1: Zinc ionomer (neutralization degree 59%, MFR 0.90 g / 10 min) of ethylene / methacrylic acid copolymer (methacrylic acid content 15% by mass, ethylene content 85% by mass)
A-2: Magnesium ionomer of ethylene / methacrylic acid copolymer (methacrylic acid content 15% by mass, ethylene content 85% by mass) (neutralization degree 54%, MFR 0.70 g / 10 min)
A-3: Lithium ionomer (degree of neutralization 52%, MFR 1.79 g / 10 min) of ethylene / methacrylic acid copolymer (methacrylic acid amount 15% by mass, ethylene amount 85% by mass)
A-4: Potassium ionomer (degree of neutralization 60%, MFR 1.44 g / 10 min) of ethylene / methacrylic acid copolymer (methacrylic acid content 15% by mass, ethylene content 85% by mass)

<Additives>
B-1: “Sanconol 0862-20R” (bis (trifluoromethanesulfonyl) imidolithium (component (B)) 20% by mass, and dibutoxyethoxyethyl adipate (component (C)) 80% by mass, manufactured by Sanko Chemical Co., Ltd. And a mixture)
B-2: “Sanconol PEO-20R” manufactured by Sanko Chemical Industry Co., Ltd. (a mixture of 20% by mass of bis (trifluoromethanesulfonyl) imide lithium (component (B)) and 80% by mass of polyalkylene oxide polyol)

≪Measurement and evaluation≫
In the preparation of the ionomer composition, the following measurements and evaluations were performed.
The evaluation results are shown in Table 1 below.

<Evaluation of melt fluidity>
After the mixing, the melt flow rate (MFR) (unit: g / 10 minutes) was measured under the conditions of a temperature of 190 ° C. and a load of 2160 g by a method according to JIS K7210-1999. The measurement results are shown in the “Composition” column of Table 1 below.
Separately, as a blank, the melt flow rate (MFR) of only the component (A) was measured under the above conditions. The measurement results are shown in the “blank” column in Table 1 below.
From the measurement results obtained above, the fluctuation width (%) of the MFR of the ionomer composition (mixture of the component (A) and the additive) with respect to the MFR of the component (A) was calculated, and the melt fluidity was evaluated. . The results are shown in the “variation width (%)” column of Table 1 below.
A smaller fluctuation range (%) indicates that a decrease or increase in melt fluidity is suppressed.

<Evaluation of non-chargeability (measurement of surface resistivity)>
The ionomer composition obtained above was press-molded into a sheet by a hot press (160 ° C.) to obtain a press sheet sample having a thickness of 3 mm.
The sample of the obtained press sheet was left for 72 hours in an atmosphere having a temperature of 23 ° C. and a relative humidity shown in Table 1.
The surface resistivity (Ω / □) of the sample after standing for 72 hours was measured using a Hiresta manufactured by Mitsubishi Chemical Corporation in accordance with JIS K6911.
It shows that it is excellent in non-charging property, so that surface resistivity is low.

As shown in Table 1, (A) an ionomer resin neutralized with a polyvalent metal, (B) an alkali metal salt or alkaline earth metal salt, and (C) an adipic acid compound that dissolves the component (B) In Sample 1 and Sample 2 containing a specific ratio, the non-charge property was excellent (surface resistivity was low) both under high and low humidity conditions, and fluctuations in melt fluidity were suppressed. Particularly, in Sample 1 using zinc ionomer as the component (A), there was almost no fluctuation in melt fluidity.
On the other hand, when the component (B) and the component (C) are combined with a monovalent metal ionomer (sample 3 and sample 4), although the non-charging property is excellent, the fluctuation of the melt fluidity is large and also decreases. Therefore, it was found that the moldability deteriorates.
Furthermore, even when the component (B) is used, when the component (C) is not contained, that is, when the organic compound that dissolves the component (B) is not an adipic acid compound (sample 5 to sample 8), It was found that the surface resistivity was increased and the non-charging property was deteriorated.

Claims (3)

(A) an ethylene / unsaturated carboxylic acid copolymer ionomer neutralized with zinc or magnesium ;
(B) an alkali metal salt ;
(C) an adipic acid compound that dissolves the component (B);
Containing
The total content of the (B) component and the (C) component, are four to 8 mass parts der respect to the component (A) 100 parts by weight,
The content of the component (A) is 80 to 98% by mass,
The component ^(B), Li +, Na ^+, or the _{^{K +, ClO 4 -, CF}} 3 SO 3 - _{^{and, -, (CF 3 SO 2}} ) 2 N -, or _{(CF 3} SO ₂₎ 3 C At least one alkali metal salt consisting of
The component (C), compounds der Ru ionomer composition represented by the following general formula (1).

[In General Formula (1), each Z independently represents an alkylene group having 2 to 4 carbon atoms, each R independently represents a linear or branched alkyl group having 1 to 9 carbon atoms, and n represents Each is independently an integer of 1-7. ]   The ionomer composition according to claim 1, wherein the mass of the component (C) is 1 to 1000 times the mass of the component (B).   The ionomer composition according to claim 1, wherein the polyvalent metal is zinc.