WO2016002785A1 - Procédé de fabrication de polymère aromatique, film en couches et séparateur - Google Patents

Procédé de fabrication de polymère aromatique, film en couches et séparateur Download PDF

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WO2016002785A1
WO2016002785A1 PCT/JP2015/068840 JP2015068840W WO2016002785A1 WO 2016002785 A1 WO2016002785 A1 WO 2016002785A1 JP 2015068840 W JP2015068840 W JP 2015068840W WO 2016002785 A1 WO2016002785 A1 WO 2016002785A1
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aromatic polymer
aromatic
organic solvent
ppm
compound
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PCT/JP2015/068840
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English (en)
Japanese (ja)
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佐藤　裕之
大次郎 星田
正吾 金子
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住友化学株式会社
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Priority to CN201580031898.1A priority Critical patent/CN106488946B/zh
Priority to JP2016531395A priority patent/JPWO2016002785A1/ja
Priority to KR1020167035878A priority patent/KR20170028318A/ko
Publication of WO2016002785A1 publication Critical patent/WO2016002785A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C08G69/28—Preparatory processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C08G69/32—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C08J9/365—Coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a method for producing an aromatic polymer having a structure represented by —C ( ⁇ O) NH—, a laminated film, and a separator.
  • Non-aqueous electrolyte secondary batteries such as lithium secondary batteries are now widely used as batteries used in devices such as personal computers, mobile phones, and portable information terminals.
  • non-aqueous electrolyte secondary batteries represented by lithium secondary batteries have high energy density. Therefore, when an internal short circuit or an external short circuit occurs due to battery damage or damage to equipment using the battery, a large current may flow and the nonaqueous electrolyte secondary battery may generate heat. Therefore, non-aqueous electrolyte secondary batteries are required to ensure high safety by preventing a certain amount of heat generation.
  • a method of providing a shutdown function to the non-aqueous electrolyte secondary battery is generally used.
  • the shutdown function is a function of preventing further heat generation by blocking the passage of ions between the positive electrode and the negative electrode by the separator when abnormal heat generation occurs in the non-aqueous electrolyte secondary battery.
  • the separator disposed between the positive electrode and the negative electrode in the battery is abnormal due to an internal short circuit between the positive electrode and the negative electrode.
  • a porous film mainly composed of polyolefin that melts at, for example, about 80 to 180 ° C. when abnormal heat generation occurs is generally used.
  • the separator mainly composed of the porous film has insufficient shape stability at high temperature, the separator contracts or a film breakage occurs in the separator while the shutdown function is executed. To do.
  • the positive electrode and the negative electrode may be in direct contact with each other, causing an internal short circuit. That is, the separator mainly composed of the porous film may not be able to sufficiently suppress abnormal heat generation due to an internal short circuit. Therefore, a separator that can ensure higher safety is demanded.
  • Patent Document 1 proposes a porous film in which a heat-resistant porous layer made of an aromatic polymer such as aromatic aramid is laminated on a polyolefin microporous film.
  • the present invention has been made in consideration of the above-mentioned problems, and its main purpose is a separator for a non-aqueous electrolyte secondary battery excellent in shape stability at high temperature, which is damaged by a battery or using a battery. Even when an internal short circuit or an external short circuit occurs due to damage to equipment, it is possible to manufacture a separator for a non-aqueous electrolyte secondary battery that can ensure high safety by preventing heat generation beyond a certain level.
  • An object of the present invention is to provide a production method capable of stably producing a suitable aromatic polymer so as to have a specific intrinsic viscosity.
  • the inventor of the present invention is an aromatic polymer in which an aromatic diamine and a compound having a hydrolyzable reactive group that reacts with an amino group are reacted in an organic solvent, wherein —C ( ⁇ O) NH—
  • the present inventors have intensively studied a method for producing an aromatic polymer having the structure represented. As a result, by adjusting the water content of the organic solvent, an aromatic polymer suitable for producing a separator for a non-aqueous electrolyte secondary battery that can ensure high safety has a specific intrinsic viscosity. As a result, the present invention was completed.
  • the method for producing an aromatic polymer according to the present invention is a method for reacting an aromatic diamine with an amino group to form a structure represented by —C ( ⁇ O) NH—.
  • a method for producing an aromatic polymer having a structure represented by -C ( O) NH-, wherein a compound having a decomposable reactive group is reacted in an organic solvent, wherein the organic solvent is 200 ppm. It contains ⁇ 2500 ppm of water, and the aromatic polymer has an intrinsic viscosity of 1.5 dL / g to 3.0 dL / g.
  • an aromatic polymer having a structure represented by —C ( ⁇ O) NH— and having an aromatic polymer intrinsic viscosity of 1.5 dL / g to 3.0 dL / g is stabilized.
  • a to B means A or more and B or less.
  • the method for producing an aromatic polymer according to the present invention has a hydrolyzable reactive group that forms a structure represented by —C ( ⁇ O) NH— by reacting with an aromatic diamine and an amino group.
  • the aromatic polymer obtained by the above production method is used as a member (heat resistant porous layer) constituting a separator in the field of producing a non-aqueous electrolyte secondary battery.
  • the aromatic polymer is a heat-resistant resin, and a heat-resistant porous layer can be formed on the surface of the substrate by a simple method such as coating (application) on a substrate used as a separator and drying.
  • the thickness of the heat resistant porous layer is preferably 1 ⁇ m or more and 10 ⁇ m or less, more preferably 1 ⁇ m or more and 5 ⁇ m or less, and particularly preferably 1 ⁇ m or more and 4 ⁇ m or less.
  • the pore diameter of the heat-resistant porous layer is preferably 3 ⁇ m or less, and more preferably 1 ⁇ m or less.
  • the heat resistance of the separator can be improved to, for example, about 400 ° C.
  • the heat resistant porous layer may contain a filler made of an organic powder or an inorganic powder having an average particle diameter of 0.01 ⁇ m or more and 1 ⁇ m or less, if necessary.
  • thermoplastic resin As the base material used as the separator of the non-aqueous electrolyte secondary battery, a thermoplastic resin is suitable.
  • the thermoplastic resin include polyolefin such as polyethylene, polypropylene, polybutene, and ethylene-propylene copolymer; and thermoplastic polyurethane.
  • the thermoplastic resin is more preferably polyethylene.
  • the polyethylene include low density polyethylene, high density polyethylene, linear polyethylene (ethylene- ⁇ -olefin copolymer), and ultrahigh molecular weight polyethylene having a molecular weight of 1 million or more.
  • the aromatic diamine is more preferably 1,4-phenylenediamine.
  • a reactive group-containing compound As a compound having an acyl group.
  • the reactive group-containing compound includes, for example, an acid dianhydride, an acid dihalide, or a urea bond (—NH—C ( ⁇ O) NH—) by reacting with an amino group.
  • the diisocyanate to be formed is mentioned.
  • the compound having an acyl group is more preferably an aromatic compound.
  • the acid dianhydride is more preferably an aromatic acid dianhydride.
  • the aromatic dianhydride include pyromellitic dianhydride, 3,3 ′, 4,4′-diphenylsulfonetetracarboxylic dianhydride, 3,3 ′, 4,4′-benzophenone tetra
  • aromatic acid dichloride is more preferable.
  • aromatic acid dichloride include phthalic acid dichloride, terephthalic acid dichloride, pyromellitic acid dichloride, 3,3 ′, 4,4′-diphenylsulfonetetracarboxylic acid dichloride, 3,3 ′, 4,4.
  • aromatic diisocyanate is more preferable.
  • aromatic diisocyanate examples include 1,2-phenylene diisocyanate, 1,3-phenylene diisocyanate, 1,4-phenylene diisocyanate, 1,2-naphthylene diisocyanate, 1,3-naphthylene diisocyanate, 1,4- Naphthylene diisocyanate, 1,5-naphthylene diisocyanate, 1,6-naphthylene diisocyanate, 1,7-naphthylene diisocyanate, 1,8-naphthylene diisocyanate, 2,3-naphthylene diisocyanate, 2,6-naphthylene diene Examples include isocyanate, 3,3′-biphenylene diisocyanate, 3,3′-benzophenone diisocyanate, and 3,3′-diphenylsulfone diisocyan
  • the reactive group-containing compound is more preferably an aromatic acid dihalide, more preferably terephthalic acid dichloride among the exemplified compounds. These reactive group-containing compounds may be used alone or in combination of two or more.
  • the aromatic polymer is, for example, preferably -20 ° C. to 50 ° C. of the aromatic diamine and the reactive group-containing compound in an organic solvent in which an alkali metal or alkaline earth metal chloride is dissolved. Can be obtained by reacting (polymerizing) at a reaction temperature of ⁇ 10 ° C. to 40 ° C.
  • the molar ratio of the aromatic diamine to the reactive group-containing compound is usually 1.000 to 1.050, preferably 1.000 to 1.040. More preferably 1.000 to 1.030.
  • the concentration of the chloride dissolved in the organic solvent is preferably 2% by weight to 10% by weight, and more preferably 3% by weight to 8% by weight.
  • chloride examples include chlorides of alkali metals such as sodium chloride and potassium chloride, and chlorides of alkaline earth metals such as magnesium chloride and calcium chloride. Of these, the chloride is more preferably calcium chloride. These chlorides may be used alone or in combination of two or more.
  • the organic solvent includes an aprotic polar solvent.
  • the aprotic polar solvent include N-methyl-2-pyrrolidone, N, N-dimethylacetamide, and N, N-dimethylformamide. Of these, the aprotic polar solvent is more preferably N-methyl-2-pyrrolidone. These organic solvents may be used alone or in combination of two or more.
  • the water content of the organic solvent used for the reaction is usually 200 ppm to 2500 ppm, preferably 200 ppm to 1500 ppm, more preferably 250 ppm to 1000 ppm.
  • the aromatic diamine and the reactive group-containing compound are reacted in the organic solvent having a water content of 200 ppm to 2500 ppm, whereby the molar ratio of these compounds is obtained.
  • the variation in the intrinsic viscosity of the aromatic polymer is reduced. As a result, it becomes easy to control the intrinsic viscosity of the aromatic polymer.
  • the method for measuring the water content of the organic solvent will be described in detail in Examples.
  • the amount of change in the intrinsic viscosity accompanying the change in the molar ratio of 0.01 is preferably 0.1 to 0.7 dL / g, more preferably 0.2 to 0.6 dL / g, and still more preferably. Is 0.3 to 0.5 dL / g.
  • the water content of the organic solvent is 200 ppm or more, side reactions are unlikely to occur, and insoluble components such as gels tend not to be generated in the organic solvent.
  • the water content of the organic solvent is 2500 ppm or less, the storage stability of the aromatic polymer solution (polymer composition) is high, and the aromatic polymer tends not to precipitate in the organic solvent. is there.
  • insoluble matter such as gel is generated in the organic solvent, wrinkles and streaks are likely to occur in the heat-resistant porous layer formed of the aromatic polymer, and the appearance of the heat-resistant porous layer tends to be poor.
  • the amount of the organic solvent used relative to the total amount of the aromatic diamine and the reactive group-containing compound is it is preferably 0.5% by weight to 20% by weight, more preferably 1% by weight to 15% by weight, and even more preferably 3% by weight to 12% by weight.
  • the aromatic polymer obtained by reacting the aromatic diamine with the reactive group-containing compound is preferably an aromatic polyamide, more preferably a wholly aromatic polyamide.
  • the aromatic polyamide may be a para-oriented aromatic polyamide or a meta-oriented aromatic polyamide.
  • the aromatic polyamide is more preferably a para-oriented aromatic polyamide because it has high mechanical strength and is easily porous.
  • the aromatic polymer is an aromatic polymer having a structure represented by —C ( ⁇ O) NH— in the main chain, and has an intrinsic viscosity of 1.5 dL / g to 3.0 dL / g, It is preferably 1.7 dL / g to 2.5 dL / g, more preferably 1.8 dL / g to 2.3 dL / g.
  • the measuring method of intrinsic viscosity is explained in full detail in an Example.
  • the intrinsic viscosity can be controlled by adjusting the molar ratio between the aromatic diamine and the reactive group-containing compound and / or the water content of the organic solvent.
  • the intrinsic viscosity is less than 1.5 dL / g, since the molecular weight of the aromatic polymer is small, the elastic modulus of the heat-resistant porous layer to be formed is lowered, and the shrinkage is suppressed when the base material is melted by heat. Less effective.
  • the intrinsic viscosity exceeds 3.0 dL / g, the molecular weight of the aromatic polymer becomes too large, so that the coating of the aromatic polymer solution (polymer composition) when applied to the substrate is performed. Workability is reduced.
  • aromatic polyamide which is an aromatic polymer obtained by the production method according to the present invention, specifically, for example, poly (paraphenylene terephthalamide), poly (metaphenylene isophthalamide), poly (parabenzamide), Poly (metabenzamide), poly (4,4′-benzanilide terephthalamide), poly (paraphenylene-4,4′-biphenylenedicarboxylic acid amide), poly (metaphenylene-4,4′-biphenylenedicarboxylic acid amide) , Poly (paraphenylene-2,6-naphthalenedicarboxylic acid amide), poly (metaphenylene-2,6-naphthalenedicarboxylic acid amide), poly (2-chloroparaphenylene terephthalamide), paraphenylene terephthalamide / 2,6 -Dichloroparaphenylene terephthalami Copolymers, and meta-phenylene terephthalamide / 2,6-dichloro-p-phenylene
  • non-aqueous electrolyte secondary batteries for example, after applying (coating) a solution of an aromatic polymer to the base material, the organic solvent is removed to remove the heat resistant porous layer on the surface of the base material. A laminated film formed with can be easily produced.
  • the method for applying (applying) the aromatic polymer solution to the substrate and the method for removing the organic solvent from the applied (applying) solution are not particularly limited, and a known method is appropriately employed. be able to.
  • the present invention includes a laminated film produced by the production method.
  • multilayer film can be easily manufactured by employ
  • the non-aqueous-electrolyte secondary battery containing the said separator can be easily manufactured by employ
  • a solution obtained by removing a part of the solvent from the solution instead of using the aromatic polymer solution obtained by performing the reaction as it is, (i) a solution obtained by removing a part of the solvent from the solution, and (ii) adding a solvent to the solution. (Iii) a solution obtained by washing the solution with water or methyl alcohol to remove chloride, (iv) evaporating part or all of the solvent and simultaneously depositing an aromatic polymer After removing chloride from the aromatic polymer by a method such as washing with water, a solution obtained by dissolving in a solvent can be used for coating (coating).
  • Moisture content The moisture content of the organic solvent was measured according to a conventional method using a Karl Fischer moisture meter.
  • T is the flow time (seconds) of the aromatic polymer solution
  • T 0 is the flow time (seconds) of the blank
  • C is the concentration of the aromatic polymer in the aromatic polymer solution (g / dl).
  • a solution obtained by the reaction (a solution in which an aromatic polymer is dissolved in an organic solvent) is 1 kgf (approximately 9 mm) using a SUS filter (diameter: 25 mm) having a 2000 mesh (pore diameter: 14 ⁇ m). 8N) under pressure.
  • occlusion coefficient was computed by following Formula.
  • t / V K S ⁇ t + 1 / Q 0
  • Filtration blockage factor H [unit: m 2 / m 3 ] A ⁇ K S
  • A is the filtration area (m 2 )
  • t is the filtration time (second)
  • V is the filtration amount (m 3 )
  • K S indicates the slope of the graph of t / V and t.
  • 1 / Q 0 indicates the intercept in the graph of t / V and t.
  • poly (paraphenylene terephthalamide) (hereinafter abbreviated as PPTA), which is a wholly aromatic polyamide, was produced by the following method.
  • NMP N-methyl-2-pyrrolidone
  • Example 4 A PPTA solution was obtained by carrying out the same operations and reactions as in Example 1 except that the water content of a solution of calcium chloride dissolved in NMP was adjusted to 300 ppm. The amount of raw materials charged and the calculation results of PPTA intrinsic viscosity are summarized in Table 1. The results of physical property evaluation of the PPTA are shown in Table 2.
  • Example 1 A PPTA solution was obtained in the same manner as in Example 1 except that the water content of the solution in which calcium chloride was dissolved in NMP was adjusted to 120 ppm. The amount of raw materials charged and the calculation results of PPTA intrinsic viscosity are summarized in Table 1. The PPTA contained a large amount of insoluble components. Although an attempt was made to evaluate the physical properties of the PPTA, the obtained PPTA solution had no fluidity, and therefore the filtration blockage coefficient could not be calculated (measurement impossible). In addition, the PPTA solution could not be applied to the substrate, and therefore a heat-resistant porous layer could not be formed (evaluation not possible). The results of Comparative Example 1 are shown in Table 2.
  • the water content was 0.89 dL / g when the water content was 120 ppm, 0.53 dL / g when the water content was 300 ppm, and 0.40 dL / g when the water content was 500 ppm. Therefore, when the moisture content is reduced from 300 ppm to 120 ppm, the amount of change in intrinsic viscosity suddenly increases, and when the moisture content is less than 200 ppm, it is difficult to control the intrinsic viscosity of the aromatic polymer to a target value. I understood. It was also found that when the water content was 3000 ppm, the intended intrinsic viscosity could not be obtained even if the molar ratio was 1.000.
  • the filtration blockage coefficient of the aromatic polymer obtained by polymerization using NMP having a water content of 500 ppm is sufficiently low, and the heat-resistant porous layer formed using the aromatic polymer has no wrinkles or streaks. Therefore, it was possible to form a heat-resistant porous layer having a good appearance.
  • the method for producing an aromatic polymer according to the present invention can be widely used, for example, in the field of producing a non-aqueous electrolyte secondary battery capable of ensuring high safety.

Abstract

　L'invention concerne un procédé pour la fabrication d'un polymère aromatique, approprié pour la fabrication d'un séparateur pour une pile rechargeable à électrolyte non aqueux dans laquelle un haut degré de sécurité peut être assuré. Le procédé pour la fabrication d'un polymère aromatique ayant une structure représentée par la formule -C(=)NH- comprend la réaction, dans un solvant organique, d'une diamine aromatique et d'un composé ayant un groupe réactif hydrolysable pour réaction avec un groupe amino, le solvant organique contenant 200 ppm à 2 500 ppm d'eau et la viscosité intrinsèque du polymère aromatique étant de 1,5 dl/g à 3,0 dl/g.
PCT/JP2015/068840 2014-07-02 2015-06-30 Procédé de fabrication de polymère aromatique, film en couches et séparateur WO2016002785A1 (fr)

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CN201580031898.1A CN106488946B (zh) 2014-07-02 2015-06-30 芳香族聚合物的制造方法、层叠膜及间隔件
JP2016531395A JPWO2016002785A1 (ja) 2014-07-02 2015-06-30 芳香族重合体の製造方法、積層フィルムおよびセパレータ
KR1020167035878A KR20170028318A (ko) 2014-07-02 2015-06-30 방향족 중합체의 제조 방법, 적층 필름 및 세퍼레이터

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DE102021003349A1 (de) 2020-06-30 2021-12-30 Sumitomo Chemical Company, Limited Zusammensetzung
DE102021003350A1 (de) 2020-06-30 2021-12-30 Sumitomo Chemical Company, Limited Laminierter Separator für Sekundärbatterie mit wasserfreiem Elektrolyt

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WO2019085899A1 (fr) * 2017-10-31 2019-05-09 Shanghai Energy New Materials Technology Co., Ltd. Procédés de préparation de solutions de polymère, séparateurs, dispositifs électrochimiques et produits associés
CN107903391A (zh) * 2017-10-31 2018-04-13 上海恩捷新材料科技股份有限公司 溶液型芳香族聚合物及其用途

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