JP2011042809A - Method for producing ionomer resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for industrially producing a potassium ionomer by a screw extruder, the potassium being used as an additive for improving a non-charge property of various polymers or for various uses. <P>SOLUTION: In the method for producing an ionomer resin composition, 70 to 98 pts.wt. mixed copolymer component having 13 to 20 wt.% average unsaturated carboxylic acid content and 200 to 800 g/10 min average MFR (190°C, 2,160 g load) comprising 2 to 55 wt.% ethylene-unsaturated carboxylic acid copolymer (A-1) having ≤15 wt.% unsaturated carboxylic acid content and ≥90°C melting point and 98 to 45 wt.% ethylene-unsaturated carboxylic acid copolymer (A-2) having >15 wt.% unsaturated carboxylic acid content and <90°C melting point and 30 to 2 pts.wt. hydrophobic polymer (B) are reacted with a potassium compound to be an ion source under melt kneading in the screw extruder to neutralize ≥80% carboxyl group of the mixed copolymer component. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ionomer resin composition that is suitable as a film material or as a resin modifier, is excellent in processability, non-chargeability, high-frequency welder properties, moisture permeability, and the like, and has a low water content, its production method, and its use.

  The ethylene copolymer ionomer in which at least a part of the carboxyl groups of the ethylene / unsaturated carboxylic acid copolymer is neutralized is obtained by reacting the ethylene / unsaturated carboxylic acid copolymer with a metal compound serving as an ion source. Obtainable. Industrially, in view of productivity, it is most advantageous to employ a method in which an ethylene / unsaturated carboxylic acid copolymer is reacted while being melt-kneaded in a screw extruder.

  Among such ethylene copolymer ionomers, it has long been known that potassium ionomers having a high unsaturated carboxylic acid content and a high degree of neutralization are excellent in antistatic performance. However, even if an attempt is made to produce a potassium ionomer having a high acid content and a high degree of neutralization by the method using the screw extruder, the ethylene / unsaturated carboxylic acid copolymer having a high acid content has a high adhesiveness to the metal. When kneading, it may be fused to the screw and cannot be extruded, and it is difficult to perform continuous and stable operation. Such troubles can be avoided to some extent by adjusting the screw rotation speed, extrusion temperature, residence time, etc., but it tends to inhibit the ionization reaction and it is difficult to increase the degree of neutralization. As a result, the unreacted metal compound was mixed into the reaction product, and this was not an industrially applicable method.

  The potassium ionomer having a high acid content and a high neutralization degree as described above also has a high hygroscopicity (water absorption), and it is not easy to dehydrate the absorbed ionomer. Further, generally, the melt viscosity is high and the adhesiveness to the apparatus is large, so that the processability is difficult, and further, there is a drawback that a molded product that is satisfactory cannot be obtained due to the foaming phenomenon when the moisture-absorbing ionomer is molded.

  As a method for reducing the hygroscopicity without substantially impairing the non-charging property, it is effective to blend a potassium ionomer having a high acid content and a potassium ionomer having a low acid content in JP-A-3-106954. Are listed. However, in this publication as well, the hygroscopicity of the blend obtained by the method specifically shown is great, and further improvements have been required depending on the application. Moreover, the method of solving the problems related to the industrial production method as described above has not been specifically shown.

  Potassium ionomer with excellent non-chargeability, when mixed with polyhydric alcohol compounds such as glycerin and polyoxyethylene glycol, potassium ionomer with slightly reduced unsaturated carboxylic acid content and neutralization degree It is known that even if it is used, it exhibits an equivalent non-charge property, and it is effective as a prescription for reducing the hygroscopicity of ionomers (JP-A-8-134295, etc.). In addition, the high frequency welder properties have been improved by blending polyhydric alcohol compounds, which is attractive as an alternative material for polyvinyl chloride in applications using high frequency seals. However, even in such a compounding prescription, although it varies depending on the type and blending amount of the polyhydric alcohol compound, depending on the use, its bleeding, discoloration, foaming at the time of molding, etc. may be a problem. There was a need for alternative prescriptions that could be completed.

  Furthermore, for the purpose of solving the problems associated with the industrial production of potassium ionomers having a high acid content and a high neutralization degree, a method for coexisting an olefin polymer is described in JP-A-6-287223. Specifically, an example in which a high-pressure polyethylene blended in a large amount is ionized is shown. In applications in which the resulting composition is used as it is, the method shown in such specific examples is effective, but it has been a problem when used as an additive for improving the non-chargeability of various polymers. In this publication, reference is also made to the case where the amount of the olefin polymer added is small, but for a specific method for improving the difficulty associated with the industrial production method when the amount added is reduced. It was not specified.

Japanese Patent Laid-Open No. 3-106954 JP-A-8-134295 JP-A-6-287223

  Therefore, an object of the present invention is to industrially advantageously use potassium ionomer, which can be widely used in various applications as an additive for improving the non-chargeability of various polymers, using a screw extruder. It is in providing the manufacturing method and the ionomer resin composition obtained by it. Another object of the present invention is to provide use of the ionomer resin composition thus obtained as a resin modifier and as a film.

  That is, the present invention provides an ethylene / unsaturated carboxylic acid copolymer (A-1) having an unsaturated carboxylic acid content of 15% by weight or less and a melting point of 90 ° C. or more, and an unsaturated carboxylic acid content of more than 15% by weight and a melting point. A mixed potassium ionomer component (A) having an ethylene / unsaturated carboxylic acid copolymer (A-2) of less than 90 ° C. as a base polymer, the copolymer (A-1) / copolymer (A-2) ) In a ratio of 2/98 to 55/45 (weight ratio), the average unsaturated carboxylic acid content of both is 13 to 20% by weight, and the average melt flow rate (190 ° C., 2160 g load) is 200 to 800 g / An ionomer resin composition comprising 70 to 98 parts by weight of the mixed potassium ionomer component (A) and 30 to 2 parts by weight of the hydrophobic polymer (B) having an average neutralization degree of 80% or more for 10 minutes. That.

The present invention also relates to an unsaturated carboxylic acid content of 2 to 55% by weight of an ethylene / unsaturated carboxylic acid copolymer (A-1) having an unsaturated carboxylic acid content of 15% by weight or less and a melting point of 90 ° C. or more in a screw extruder. It consists of 98 to 45% by weight of an ethylene / unsaturated carboxylic acid copolymer (A-2) having an acid content of more than 15% by weight and a melting point of less than 90 ° C., and the average unsaturated carboxylic acid content of both is 13 to 20% by weight , 70 to 98 parts by weight of a mixed ethylene / unsaturated carboxylic acid copolymer component having an average melt flow rate (190 ° C., 2160 g load) of 200 to 800 g / 10 minutes and 30 to 2 parts by weight of a hydrophobic polymer (B) preparative, while melt kneading is reacted with potassium compound comprising an ion source, the upper Symbol ionomer you neutralize more than 80% of the carboxyl groups of the mixed ethylene-unsaturated carboxylic acid copolymer component The method for producing a fat composition.

  The present invention also relates to the use of the ionomer resin composition.

  According to the present invention, an ionomer resin composition having excellent non-charging properties can be industrially advantageously produced. Such an ionomer resin composition is excellent in processability, high-frequency welder properties, moisture permeability, and the like, and can be used in various applications such as film materials and resin modifiers.

  The mixed potassium ionomer component (A) used in the present invention has two kinds of ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) as base polymers, and these carboxyl groups have an average of 80% or more, preferably 80 to 95% is an ionomer neutralized with potassium ions. These two kinds of ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) also have an unsaturated carboxylic acid content of 15% by weight or less and a melting point of 90 ° C. or more, preferably unsaturated. The carboxylic acid content is in the range of 5 to 15% by weight and the melting point is in the range of 90 to 110 ° C. The latter unsaturated carboxylic acid content is more than 15% by weight and the melting point is less than 90 ° C., preferably the unsaturated carboxylic acid content is 17 -30% by weight and the melting point is in the range of 60-89 ° C, and the copolymer (A-1) / copolymer (A-2) has a weight ratio of 2/98 to 55/45, preferably 5 / It mix | blends so that it may become a ratio of 95-50 / 50. And both have the average unsaturated carboxylic acid content which combined both in the range of 13-20 weight%, Preferably it is in the range of 14-19 weight%, Moreover, the average melt flow rate combining both is 200-800 g / 10min, Preferably it is blended so as to be in the range of 250 to 700 g / 10 min.

  If an average neutralization degree of the mixed potassium ionomer component (A) is lower than 80%, the antistatic performance is not sufficient. If the degree of neutralization is too high, the cohesive force becomes strong, and if a material blended with another resin is used as a film, a large amount of gel is likely to be produced, resulting in poor appearance. Further, in the water-absorbing state, the foaming and foaming may impair the productivity and workability.

  If only the ethylene / unsaturated carboxylic acid copolymer (A-2) is used here, it cannot be extruded smoothly in a screw extruder, and the desired ionomer resin composition can be used even if a hydrophobic polymer described later is used in combination. The product cannot be produced industrially advantageously. Further, even if an ionomer resin composition based only on (A-2) is produced, the antistatic property is good, but the hygroscopicity becomes too large, and the workability is also impaired. Therefore, in the present invention, an appropriate amount of the ethylene / unsaturated carboxylic acid copolymer (A-1) is blended in order to smoothly perform the ionization reaction by the screw extruder and in the range not accompanied by a significant decrease in the antistatic performance. It is what you use. And the productivity of the ionomer resin composition in a screw extruder is adjusted by adjusting the blending amount of (A-1) and (A-2) and the average unsaturated carboxylic acid content of both to the above-described ranges. While improving, it can obtain the ionomer resin composition which is excellent in antistatic performance and workability, and has low water absorption and low hygroscopicity.

  Copolymers (A-1) and (A-2) are also blended in appropriate proportions so that the combined melt flow rate is within the range described above. . If the combined melt flow rate is less than 200 g / 10 min, the productivity and workability are not sufficient, and the melt flow rate exceeding 800 g / 10 min is not preferable because the productivity is not good.

  The ethylene / unsaturated carboxylic acid copolymer (A-1) has an unsaturated carboxylic acid content of 15% by weight or less, preferably 5 to 15% by weight as described above, and a melting point of 90 ° C. or higher. The temperature is preferably 92 ° C. or higher. The melt flow rate is preferably 30 to 1000 g / 10 minutes, more preferably 50 to 800 g / 10 minutes. As described above, the ethylene / unsaturated carboxylic acid copolymer (A-2) has an unsaturated carboxylic acid content of more than 15% by weight, preferably 17 to 30% by weight, and a melting point of 90 ° C. Less than, preferably 60-89 ° C. The melt flow rate is preferably 30 to 1000 g / 10 minutes, more preferably 50 to 800 g / 10 minutes. Here, the melting point is a temperature showing an endothermic peak measured by DSC method [measured by Differential Scanning Calorimeter (manufactured by TA Instruments)] (temperature increase rate 10 ° C./min).

  Examples of the unsaturated carboxylic acid in the ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) include acrylic acid, methacrylic acid, fumaric acid, itaconic acid, monomethyl maleate, monoethyl maleate, and anhydrous Maleic acid, itaconic anhydride and the like can be exemplified as representative examples. Of these, acrylic acid or methacrylic acid is most preferred.

  In these copolymers (A-1) and (A-2), other monomers may be copolymerized as optional components. The presence of such an optional copolymerization component is effective in imparting flexibility to the ionomer and improving moisture permeability. Specifically, methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, acrylic acid Examples thereof include unsaturated carboxylic acid esters such as n-butyl, isooctyl acrylate, methyl methacrylate, isobutyl methacrylate and dimethyl maleate, vinyl esters such as vinyl acetate and vinyl propionate, and carbon monoxide. Such an optional copolymer component may be contained in an amount of, for example, 40% by weight or less, preferably 20% by weight or less. If such an arbitrary copolymerization component is contained excessively, it will have adverse effects such as lowering mechanical strength or causing blocking.

  As the ethylene / unsaturated carboxylic acid copolymer (A-1), two or more types having different compositions and melt flow rates may be used in combination. In the ethylene / unsaturated carboxylic acid copolymer (A-2), Similarly, two or more types can be used in combination.

  The ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) described above are prepared by radical copolymerization of ethylene, an unsaturated carboxylic acid, and optionally other copolymer components under high temperature and high pressure conditions. It can be obtained by polymerization.

  The ionomer resin composition of the present invention is 30 to 2 parts by weight, preferably 25 to 25 parts by weight of the hydrophobic polymer (B) with respect to 70 to 98 parts by weight, preferably 75 to 95 parts by weight of the mixed potassium ionomer component (A). It is blended at a ratio of 5 parts by weight. That is, by blending a hydrophobic compound at such a ratio, it is possible to perform potassium ionization of ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) in a screw extruder with high productivity. It becomes. Further, since the hygroscopicity can be remarkably reduced without significantly impairing the non-charging property, it can be used for various applications without paying much attention to storage and handling. Even if the blending ratio of the hydrophobic polymer is increased to the above range or more, the improvement in hygroscopicity is not so remarkable, but the properties of the potassium ionomer are impaired, so that the use is limited.

  Examples of the hydrophobic polymer (B) used for such purposes include high-pressure polyethylene, linear low, medium density polyethylene, high density polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1- Homopolymers of olefins such as pentene or copolymers of olefins, ethylene and vinyl esters such as vinyl acetate and vinyl propionate, methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, acrylic Copolymers with unsaturated esters such as isobutyl acid, 2-ethylhexyl acrylate, methyl methacrylate and dimethyl maleate, polystyrene, AS resin, ABS resin, styrene / butadiene block copolymer Combined or its hydrogenated product, styrene / isoprene block Styrene resin such as copolymer or hydrogenated product thereof, nylon 6, nylon 66, nylon 610, nylon 11, nylon 12, nylon 6, 66, nylon 6, 12 and nylon 6TI, polyamide, polyethylene terephthalate, poly Examples thereof include polyester such as trimethylene terephthalate and polytetramethylene terephthalate, polycarbonate, polyacetal, polyphenylene ether, acrylic resin, and polyvinyl chloride.

  Among these hydrophobic polymers, considering the affinity with ionomers and the melt viscosity when ionized, olefin polymers or copolymers, especially polyethylene or ethylene / unsaturated ester copolymers, especially ethylene / unsaturated polymers. The use of saturated ester copolymers is preferred.

  As the polyethylene, various catalyst systems can be used, and those produced by various methods can be used. However, ethylene known as high-pressure polyethylene or linear low-density polyethylene and an α-olefin having 3 or more carbon atoms can be used. The use of a copolymer is preferred. Examples of the α-olefin having 3 or more carbon atoms, which is a copolymer component of linear polyethylene, include propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 4-methyl-1 -Pentene and the like, particularly those having 4 to 10 carbon atoms. Linear polyethylene includes Ziegler-type catalysts, which are typically combinations of highly active titanium catalyst components and organoaluminum catalyst components, and single-site catalysts, which are typically combinations of bispentadienylzirconium compounds and aluminoxane compounds. What was manufactured etc. can be used.

  An ethylene / unsaturated ester copolymer suitable as the hydrophobic polymer (B) has an unsaturated ester content of 2 to 50% by weight, particularly 4 to 40% by weight. By using such an ethylene / unsaturated ester copolymer, a relatively transparent ionomer resin composition uniformly mixed with the mixed potassium ionomer component can be obtained.

  As polyethylene and ethylene / unsaturated ester copolymer suitable as a hydrophobic polymer, in consideration of the melt viscosity at the time of ionization reaction or the physical properties of the ionomer resin composition produced and the compatibility of components, It is preferable to use a melt flow rate at a load of 2160 g of 0.5 to 50 g / 10 minutes, preferably about 1 to 30 g / 10 minutes.

  The ionomer resin composition of the present invention comprising a mixed potassium ionomer component (A) and a hydrophobic polymer (B) comprises an ethylene / unsaturated carboxylic acid copolymer (A-1) and (A-2) and a hydrophobic heavy polymer. The coalescence (B) can be obtained by reacting with a potassium compound while melt-kneading in a screw extruder. The temperature of the melt-kneading is a temperature higher than the melting points of the ethylene / unsaturated carboxylic acid copolymers (A-1) and (A-2) and the hydrophobic polymer (B), generally 150 ° C. or higher. It is preferably carried out in the range of 160 to 280 ° C., preferably while maintaining a residence time of 60 seconds or longer. As the screw extruder, it is preferable to use a screw extruder having a vent mechanism in order to remove by-products generated by the ionization reaction.

The ionomer resin composition of the present invention obtained as described above generally has a surface resistivity of 10 ¹³ Ω or less, preferably 10 ¹² Ω or less at a relative humidity of 30% RH, and a product of dielectric constant and dielectric loss tangent of 0.1 or less. 1 or more, preferably 0.2 or more, 50 [mu] m moisture permeability of the molded inflation film thickness is 2000g ^{/ m} 2 ^/ d or more, preferably a value of 3000~20000g ^{/ m} 2 ^/ d. A water content of 10,000 ppm or less, preferably 5000 ppm or less can be easily obtained.

  The ionomer resin composition of the present invention having such characteristics can be used as it is or as desired, as desired, for example, antioxidants, weathering stabilizers, light stabilizers, ultraviolet absorbers, lubricants, slip agents, pigments, A dye, a crosslinking agent, a foaming agent, a tackifier and the like can be added and used for various applications.

  For example, it can be used for various films (sheets), mats, containers, wallpaper, shoes, battery separators, hygiene products, moisture-permeable films, nonwoven fabrics, food packaging materials, and the like. In particular, since the ionomer resin composition of the present invention is excellent not only in non-charging properties but also in high frequency welder properties, it can be used as a single layer film to which a high frequency seal is applied or a laminated film with other materials. In order to have both non-charging property and high-frequency sealing property in such a laminated film, the ionomer resin composition of the present invention may be used as a heat seal layer or a layer adjacent to the heat seal layer.

  Examples of the material that can be used as the other layer of the laminated film include an aluminum foil, an aluminum vapor-deposited film, a silica vapor-deposited film, and an ethylene / vinyl alcohol copolymer in addition to the hydrophobic polymer described above. Of course, in the laminated film, the material may have not only one layer but also two or more layers. The ionomer resin composition of the present invention can also be used as a modifier for imparting non-chargeability to various polymers. Examples of the polymer to be modified include the above-mentioned hydrophobic polymers and ethylene / vinyl alcohol copolymers. If the effective blending amount occupies 10 to 30% by weight as a potassium ionomer component in the blended resin composition, the non-charging property can be improved without significantly impairing the physical properties of the resin to be modified. Therefore, it is preferable.

  Hereinafter, the present invention will be described in more detail with reference to examples. In addition, the various raw material used by the Example and the comparative example and the physical-property evaluation method of the obtained ionomer resin composition are as follows.

(1) Raw material [ethylene / methacrylic acid copolymer]
Acid copolymer (I): methacrylic acid content 10% by weight, MFR (melt flow rate) 500 g / 10 min, melting point 95 ° C.
Acid copolymer (II): methacrylic acid content 15% by weight, MFR 60 g / 10 min, melting point 90 ° C.
Acid copolymer (III): methacrylic acid content 20% by weight, MFR 60 g / 10 min, melting point 87 ° C.
Acid copolymer (IV): methacrylic acid content 20% by weight, MFR 500 g / 10 min, melting point 80 ° C.

[Potassium compound]
Ion source: Potassium carbonate

[Hydrophobic polymer]
EVA: Ethylene / vinyl acetate copolymer with a vinyl acetate content of 9% by weight (MFR 2.5 g / 10 min)
EEA: Ethylene acrylate copolymer having an ethyl acrylate content of 19% by weight (MFR 5.0 g / 10 min)
mPE: linear low-density polyethylene manufactured with a metallocene catalyst (SP0540, MFR 4.0 g / 10 min, manufactured by Mitsui Chemicals, Inc.)

(2) Physical property evaluation method [Productivity]
○: Can be produced without problems with an extruder with a 65 mmφ vent △: Cannot be stably produced with an extruder with a 65 mmφ vent ×: Cannot be produced with an extruder with a 65 mmφ vent

[Machinability]
EVA and the ionomer resin composition were dry blended at a weight ratio of 80/20, formed into a 50 μm-thick film with a 30 mmφ inflation film molding machine, and the appearance was observed and evaluated according to the following criteria.
○: A uniform film is obtained.
×: High melt viscosity or uniform film cannot be obtained due to moisture absorption.

[Antistatic performance]
The sample was left to stand for 24 hours under a relative humidity of 30% RH, and the surface resistivity was measured. The measuring device used was Hiresta manufactured by Mitsubishi Chemical Corporation.

[Moisture content]
After ionization and pelletization, this was dehumidified for one day and night with dry air at an open air of −40 ° C., and its water content was measured at 190 ° C.

[High frequency welder]
The dielectric constant (ε) and dielectric loss tangent (tan δ) of the sample were measured with a Q meter and evaluated as follows.
○: ε × tan δ is 0.1 or more ×: ε × tan δ is smaller than 0.1

[Moisture permeability]
A film having a thickness of 50 μm was formed, and moisture permeability was measured by a cup method.

[Examples 1 to 4, Comparative Examples 1 to 7]
Ionomer is prepared by dry blending the raw material pellets into a 65 mmφ vented screw extruder, ionizing at a resin temperature of 240 ° C. and an extrusion rate of 15 kg / h, cooling the extruded strand with water and cutting it. A pellet of the resin composition was obtained. At this time, gas and moisture generated in the vent portion were removed by a vacuum pump. The amount of each raw material used is as shown in Table 1 or Table 2, and the ion source was used in an amount corresponding to the degree of neutralization shown in Table 1 or Table 2.

  The productivity was evaluated by the extrusion situation when the ionomer composition was prepared by the above method. Further, the ionomer composition thus obtained was made into a film having a thickness of 50 μm under a resin temperature of 210 ° C. with a 30 mmφ inflation film molding machine, and was evaluated for processability, antistatic performance, high frequency welder property, and moisture permeability. Samples of

[Example 5]
The composition obtained by melt blending 20 parts by weight of the ionomer resin composition obtained in Example 1 and 80 parts by weight of the EVA was evaluated for antistatic performance and high frequency welder properties. The antistatic performance was 2 × 10 ¹² Ω, and the high frequency welder was ◯.

[Example 6]
The composition obtained by melt blending 20 parts by weight of the ionomer resin composition obtained in Example 1 and 80 parts by weight of the EVA was evaluated for antistatic performance and high frequency welder properties. The antistatic performance was 2 × 10 ¹² Ω, and the high frequency welder was ◯.

[Example 7]
Using a multi-layer inflation film forming apparatus equipped with a three-layer inflation die, the EVA composition obtained in Example 5 was passed through an intermediate layer extruder as an intermediate layer, and a linear low density was passed through both outer layer extruders as both outer layers. Polyethylene (manufactured by Mitsui Chemicals, Inc.) was supplied to produce a 100 μm thick three-layer film having a structure of 10 μm / 80 μm / 10 μm.

The antistatic performance of this three-layer film was evaluated by measuring the decay time by the following method.
Measuring instrument: US ETS Static Decay Meter Model 406D
Measurement conditions: Conforms to Federal Test Method 101C 4046
Listed in test specifications of MIL-B-81705C
Measured at an applied voltage of 5000 V using a sample left at 26 ° C. and 12% RH for 24 hours. The time from 5000 V to 50 V was measured. The decay time was 2 seconds or less, and good non-charging property was shown.

  Further, the above three-layer film was superposed, high frequency sealed, the seal part was peeled off, and the peeled state was visually observed. Adhesion was made to such an extent that the base material was destroyed, and the high-frequency sealability was good.

The method for producing an ionomer resin composition provided by the present invention is an industrially advantageous method for producing an ionomer resin composition excellent in non-chargeability.
The ionomer resin composition produced by the production method provided by the present invention is excellent in processability, high-frequency welder properties, moisture permeability, etc., and used for film materials, resin modifiers, and various applications. Can do.
The ionomer resin composition of the present invention can also be suitably used as a resin modifier comprising an ionomer resin composition.
The ionomer resin composition of the present invention can be used as a resin composition obtained by diluting an ionomer resin composition with a hydrophobic polymer (B).
The ionomer resin composition of the present invention can be a film comprising a resin composition obtained by diluting an ionomer resin composition with a hydrophobic polymer (B).

Claims (6)

  In the screw extruder, 2 to 55% by weight of an unsaturated carboxylic acid copolymer (A-1) having an unsaturated carboxylic acid content of 15% by weight or less and a melting point of 90 ° C. or higher and an unsaturated carboxylic acid content of 15% by weight. % Of an ethylene / unsaturated carboxylic acid copolymer (A-2) having a melting point of less than 90 ° C. (A-2) of 98 to 45% by weight, the average unsaturated carboxylic acid content of both being 13 to 20% by weight, and the average melt flow rate Melting and kneading 70 to 98 parts by weight of a mixed ethylene / unsaturated carboxylic acid copolymer component (190 ° C., 2160 g load) of 200 to 800 g / 10 minutes and 30 to 2 parts by weight of a hydrophobic polymer (B) Ionomer tree characterized by neutralizing 80% or more of the carboxyl groups of the mixed ethylene / unsaturated carboxylic acid copolymer component by reacting with a potassium compound as an ion source while Processes for making compositions.   The method for producing an ionomer resin composition according to claim 1, wherein the hydrophobic polymer (B) is an olefin polymer or copolymer.   The method for producing an ionomer resin composition according to claim 2, wherein the olefin polymer or copolymer is polyethylene or an ethylene / unsaturated ester copolymer. The moisture content is 10,000 ppm or less, the surface resistivity is 10 ¹³ Ω or less, the dielectric constant × dielectric loss tangent is 0.1 or more, and the moisture permeability of the blown film formed to a thickness of 50 μm is 2000 g / m ² / d or more. 4. The method for producing an ionomer resin composition according to any one of 3 above.   The method for producing an ionomer resin composition according to any one of claims 1 to 4, comprising (A-1) 2 to 45 wt% and (A-2) 98 to 55 wt%.   The manufacturing method of the ionomer resin composition of any one of Claims 1-5 which neutralizes 85% or more and 95% or less of the carboxyl group of a mixed ethylene and unsaturated carboxylic acid copolymer component.