WO2020044744A1 - Composition de résine durcissable à deux liquides pour enrobage de batterie - Google Patents

Composition de résine durcissable à deux liquides pour enrobage de batterie Download PDF

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Publication number
WO2020044744A1
WO2020044744A1 PCT/JP2019/024537 JP2019024537W WO2020044744A1 WO 2020044744 A1 WO2020044744 A1 WO 2020044744A1 JP 2019024537 W JP2019024537 W JP 2019024537W WO 2020044744 A1 WO2020044744 A1 WO 2020044744A1
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WIPO (PCT)
Prior art keywords
component
polyol
mass
parts
battery
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PCT/JP2019/024537
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English (en)
Japanese (ja)
Inventor
吉田　哲也
明良 西川
貴士 北川
宮村　岳志
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第一工業製薬株式会社
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Application filed by 第一工業製薬株式会社 filed Critical 第一工業製薬株式会社
Priority to CN201980053350.5A priority Critical patent/CN112585808B/zh
Publication of WO2020044744A1 publication Critical patent/WO2020044744A1/fr

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Classifications

    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/36—Hydroxylated esters of higher fatty acids
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • 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 two-part curable resin composition for battery potting.
  • Patent Document 1 discloses a technique capable of preventing a battery from burning to another battery when the battery is ignited due to an abnormality. Specifically, in Patent Literature 1, by heating a battery with a polyurethane elastomer or the like, a heat chain from a battery that has caused abnormal heat generation to another battery is suppressed.
  • the battery pack in which the batteries are stored is required to be lightweight, so that the increase in weight due to potting of the resin has been a problem.
  • the present invention has been made in order to solve the above problems, and an object of the present invention is to provide a two-part curable resin composition for battery potting that is light in weight and can prevent spread of fire between batteries. It is.
  • a two-part curable resin composition for battery potting is a two-part curable resin composition having a first component (X) and a second component (Y).
  • the first component (X) includes the polyol (A) and water (B)
  • the second component (Y) includes the isocyanate (C)
  • the first component (X) and the first component (X) includes the polyol (A) and water (B)
  • the second component (Y) includes the isocyanate (C)
  • At least one of the two components (Y) contains a flame retardant (D), the polyol (A) contains a polyol (a-1) having a molecular weight of 2,000 or more, and the first component (X) and the The total amount of the flame retardant (D) contained in the second component (Y) is 25 to 75 parts by mass based on 100 parts by mass of the total amount of the first component (X) and the second component (Y).
  • the amount of the polyol (A) is the total amount of the flame retardant (D) 1 20 to 150 parts by mass with respect to 0 parts by mass, and the amount of the polyol (a-1) having a molecular weight of 2,000 or more is 70 to 100 parts by mass with respect to 100 parts by mass of the polyol (A).
  • the amount of water (B) is 0.35 parts by mass or less based on 100 parts by mass of the total of the first component (X) and the second component (Y).
  • a two-pack curable resin composition for battery potting which is light in weight and is capable of preventing burning between batteries.
  • the two-pack curable resin composition for battery potting according to the present embodiment is a two-pack curable resin composition having a first component (X) and a second component (Y).
  • the component (X) contains a polyol (A) and water (B)
  • the second component (Y) contains an isocyanate (C)
  • the first component (X) and the second component (Y) At least one of them contains a flame retardant (D)
  • the polyol (A) contains a polyol (a-1) having a molecular weight of 2,000 or more
  • the first component (X) and the second component (Y) Is 25 to 75 parts by mass with respect to 100 parts by mass of the total of the first component (X) and the second component (Y) contained in the polyol (A).
  • the amount of the polyol (a-1) having a molecular weight of 2,000 or more is 70 to 100 parts by mass with respect to 100 parts by mass of the polyol (A), and the amount of the water (B) is 0.35 parts by mass or less based on 100 parts by mass of the total amount of the first component (X) and the second component (Y).
  • the battery can be potted with the urethane foam, so that the entire battery pack can be reduced in weight, and a high anti-spreading property can be provided between batteries (cells). Further, it is possible to suppress deformation and reduction in strength due to shrinkage of urethane foam, which usually occur when a large amount of a flame retardant is contained. In addition, it is possible to suppress the influence of heat generated during curing on the battery life and the like.
  • the polyol (a-1) having a molecular weight of 2,000 or more includes a polyether polyol (a-1-1) having a structure in which a plurality of oxyethylene groups are bonded in series at each terminal, The total amount of oxyethylene groups connected in series at each terminal is 5 to 35 mol% of the whole polyether polyol (a-1-1).
  • the isocyanate (C) contains a urethane prepolymer (c-1) having an isocyanate group at a terminal, and the urethane prepolymer reacts at least an aromatic isocyanate with a polyol (cp). To be obtained.
  • the aromatic isocyanate is at least one of diphenylmethane diisocyanate and a modified diphenylmethane diisocyanate.
  • the isocyanate (C) includes a urethane prepolymer (c-1) having an isocyanate group at a terminal portion, and the urethane prepolymer (c-1) comprises at least an isocyanate (ci); Obtained by reacting with castor oil-based polyol.
  • the polyol (A) further contains a polyol (a-2) having a molecular weight of 200 or less, and the amount of the polyol (a-2) having a molecular weight of 200 or less depends on the amount of the flame retardant (D ) Is 1.5 to 15 parts by mass with respect to 100 parts by mass in total.
  • the urethane foam can effectively prevent the adjacent battery from burning, and the battery pack appropriately absorbs an external impact. Can be as hard as possible.
  • the urethane foam according to the present embodiment is a cured product of the two-pack curable resin composition for battery potting.
  • the battery pack according to the present embodiment is potted with the urethane foam.
  • the two-part curable resin composition for battery potting according to the present embodiment includes at least a first component (X) and a second component (X) described below. It has a component (Y).
  • the two-component curable resin composition may have a component other than the first component (X) and the second component (Y).
  • the first component (X) contains a polyol (A), water (B), and a flame retardant (D).
  • the flame retardant (D) may be contained in the second component (Y) instead of the first component (X), or may be contained in both the first component (X) and the second component (Y). Is also good.
  • the polyol (A) contains a polyol (a-1) having a molecular weight of 2000 or more.
  • the molecular weight of the polyol (a-1) is preferably 2500 or more from the viewpoint of suppressing the shrinkage of the obtained urethane foam.
  • the molecular weight is preferably 10,000 or less, and is preferably 6,000 or less. More preferably, it is 5,000 or less, more preferably, 4,000 or less.
  • the urethane foam shrinks, a gap is formed between the battery and the urethane foam, resulting in a decrease in anti-spreading properties, or a decrease in strength, and the battery cannot withstand an impact when explosively ignited. I do. Further, when the urethane foam shrinks, for example, the wall surface of the container filled with the urethane foam is pulled inward to apply stress, and the container may be deformed or cracked.
  • the polyol (a-1) having a molecular weight of 2,000 or more is not particularly limited, and examples thereof include a polyether polyol, a polyester polyol, and a polyolefin polyol.
  • polyether polyol examples include, but are not particularly limited to, propylene glycol, ethylene glycol, glycerin, trimethylolpropane, hexanetriol, triethanolamine, diglycerin, pentaerythritol, ethylenediamine, methyldigit, aromatic diamine, sorbitol, and sucrose. And those obtained by ring-opening polymerization of an alkylene oxide using, phosphoric acid or the like as an initiator.
  • the polyether polyol is not particularly limited, and examples thereof include a polymer polyol obtained by polymerizing a vinyl monomer such as acrylonitrile and styrene in the polyether polyol and dispersing the resulting polymer in the polyether polyol. That is, the polymer polyol is a polyether polyol in which resin particles are dispersed.
  • the average particle size of the resin is not particularly limited, but is about 0.1 to 10 ⁇ m.
  • the polyester polyol is not particularly limited, but may be a polyhydric hydroxyl group-containing compound and a polycarboxylic acid (aromatic polycarboxylic acid or aliphatic polycarboxylic acid) or anhydride and its lower alkyl (the alkyl group has 1 to 4 carbon atoms).
  • a polycarboxylic acid aromatic polycarboxylic acid or aliphatic polycarboxylic acid
  • anhydride and its lower alkyl the alkyl group has 1 to 4 carbon atoms.
  • Ester-forming derivatives such as esters (such as phthalic anhydride and dimethyl terephthalate); polylactone polyols; polycarbonate polyols; Polyester polyols (mono- or diglycerides of castor oil fatty acids, mono-, di- or triesters of castor oil fatty acids and trimethylolpropane, mono- or diesters of castor oil fatty acids and polyoxypropylene glycol, etc.); A It can be used like castor oil and the like hydroxyl group-terminated prepolymer derived from a diphenylmethane diisocyanate]; sharp emission oxide obtained by adding the (2-4 carbon atoms).
  • esters such as phthalic anhydride and dimethyl terephthalate
  • polylactone polyols such as esters (such as phthalic anhydride and dimethyl terephthalate); polylactone polyols; polycarbonate polyols; Polyester polyols (mono- or diglycerides of
  • the polyolefin polyol is not particularly limited, and examples thereof include polybutadiene polyol, polyisoprene polyol, and hydrogenated products thereof.
  • the polyol (a-1) is preferably a polyether polyol from the viewpoint of suppressing shrinkage of the obtained urethane foam.
  • the polyol (a-1) may contain a plurality of polyols of different types, or may contain a plurality of polyols of the same type but different in molecular weight distribution.
  • molecular weight represents a number average molecular weight of a compound having a molecular weight distribution such as polypropylene glycol.
  • the amount of the polyol (a-1) having a molecular weight of 2,000 or more is 70 to 100 parts by mass, when the total amount of the polyol (A) is 100 parts by mass. If the polyol (a-1) is less than this range, the resulting urethane foam will shrink.
  • the polyol (a-1) having a molecular weight of 2,000 or more preferably contains a polyether polyol (a-1-1) having a structure in which ethylene oxide is block-added to the terminal.
  • each terminal of the polyether polyol (a-1-1) has a structure in which a plurality of ethylene oxides are continuously polymerized. That is, the polyether polyol (a-1-1) has a structure in which a plurality of oxyethylene groups are connected in series at each terminal.
  • polyether polyol (a-1-1) is preferably bifunctional or trifunctional from the viewpoint of enhancing impact absorption.
  • polyether polyol (a-1-1) can be represented, for example, by the following formula (1).
  • R represents a structure derived from a starting material or a structure in which a starting material alkylene oxide is polymerized
  • AO represents an oxyalkylene group other than an oxyethylene group
  • EO represents an oxyethylene group.
  • a and d indicate the number of repeating units of the corresponding EO, respectively
  • b and c indicate the number of repeating units of the corresponding AO.
  • x is either 1 or 2.
  • the total amount of oxyethylene groups connected in series at each end is determined by forming irregularities on the urethane foam surface.
  • the content is preferably 5 mol% or more of the entire polyether polyol (a-1-1) (for example, the entire structure represented by the formula (1)), preferably 10 mol%. More preferably, it is the above.
  • the total amount is preferably 35 mol% or less, and more preferably 30 mol% or less.
  • the polyol (a-1) having a molecular weight of 2,000 or more may contain a polyol (a-1-2) having a molecular weight of 2,000 or more, in addition to the polyether polyol (a-1-1).
  • the polyol (A) according to the present embodiment preferably further contains a polyol (a-2) having a molecular weight of 200 or less from the viewpoint of suppressing shrinkage of the obtained urethane foam.
  • the polyol (a-2) having a molecular weight of 200 or less is not particularly limited, but ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, tripropylene glycol, 3-methyl-1,5-pentanediol, 2-butyl Aliphatic diols such as -2-ethyl-1,3-propanediol and 2-methyl-1,3-propanediol; alicyclic diols such as 1,4-cyclohexanediol and 1,4-cyclohexanedimethanol Glycerin, trimethylolpropane, pentane It may
  • polyol (a-2) ethylene glycol and diethylene glycol are preferable from the viewpoint of suppressing shrinkage of the urethane foam.
  • the polyol (A) according to the present embodiment may contain other polyols other than the polyol (a-1) having a molecular weight of 2,000 or more and the polyol (a-2) having a molecular weight of 200 or less.
  • examples of such other polyols include castor oil-based polyols, polyether polyols, polyester polyols, and polyolefin polyols.
  • the amount of the polyol (A) according to the present embodiment is 20 to 150 parts by mass based on 100 parts by mass of the total amount of the flame retardant (D) contained in the first component (X) and the second component (Y). And preferably 35 to 120 parts by mass, more preferably 40 to 90 parts by mass. If the polyol (A) according to the present embodiment is less than this range, the obtained urethane foam shrinks. On the other hand, when the amount of the polyol (A) is larger than this range, it is not possible to give the foamed urethane a sufficient anti-combustibility.
  • the amount of the polyol (a-2) having a molecular weight of 200 or less according to the present embodiment is preferably 1.5 to 1.5 parts by mass based on 100 parts by mass of the total amount of the flame retardant (D) from the viewpoint of improving the anti-combustion property.
  • the amount is preferably 15 parts by mass, more preferably 1.7 to 12 parts by mass.
  • the first component (X) contains water (B).
  • the amount of water (B) is 0 with respect to 100 parts by mass of the total amount of the first component (X) and the second component (Y) from the viewpoint of suppressing the variation in the expansion ratio while realizing the weight reduction of the urethane foam. 0.1 part by mass or more, more preferably 0.15 part by mass or more.
  • the foaming ratio varies, the urethane foam does not spread evenly in the battery pack, so that the fire preventing property is reduced, or the urethane foam exceeds the capacity of the battery pack.
  • the amount of water (B) is 0.35 parts by mass or less based on 100 parts by mass of the total amount of the first component (X) and the second component (Y) from the viewpoint of suppressing shrinkage of the urethane foam. And more preferably 0.3 parts by mass or less.
  • the total amount of the flame retardant (D) contained in at least one of the first component (X) and the second component (Y) according to the present embodiment is the first component (X) and the second component (Y) Is 25 to 75 parts by mass, preferably 29 to 72 parts by mass with respect to 100 parts by mass of the total amount. If the amount of the flame retardant (D) is less than this range, the foamed urethane cannot have sufficient anti-burning properties. If the amount of the flame retardant (D) is larger than this range, the resin shrinks.
  • the flame retardant (D) according to the present embodiment is not particularly limited, and examples thereof include a bromine flame retardant, a phosphorus flame retardant, a nitrogen flame retardant, and an inorganic flame retardant.
  • a bromine flame retardant a phosphorus flame retardant
  • a nitrogen flame retardant a nitrogen flame retardant
  • an inorganic flame retardant a flame retardant (D)
  • one kind of flame retardant may be used alone, or two or more kinds of flame retardants may be used in combination.
  • brominated flame retardant examples include, but are not particularly limited to, hexabromocycloheptane, tetrabromocycloheptane, tetrabromocyclooctane, hexabromocyclododecane, other brominated cycloalkanes, polybromodiphenyl ether, and tetrabromobisphenol A (hereinafter, referred to as tetrabromobisphenol A).
  • TBBA TBBA
  • epoxy oligomer TBBA / carbonate oligomer
  • TBBA / bis TBBA / bis (dibromopropyl ether)
  • TBBA / bis TBBA / bis (dibromomethylpropyl ether)
  • other TBBA derivatives bis (pentabromophenyl) ethane, 1,2-bis (2,4,6-trisbromophenoxy) ethane, 1,2-bis (2,4,6-trisbromophenoxy) -1,3,5-triazine, 2,6-dibromomonophenol, 2,4- Dibromomo Phenol, ethylene bistetrabromophthalimide, tribromophenyl allyl ether, tribromophenyl acrylate, pentabromobenzyl allyl ether, pentabromobenzyl acrylate, bromoacrylate monomer, brominated polystyrene, polybro
  • Examples of the phosphorus-based flame retardant include, but are not particularly limited to, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl phenyl phosphate, other aromatic phosphates, aromatic condensed phosphates, and diphenyl monophosphate.
  • nitrogen-based flame retardant examples include, but are not particularly limited to, guanidine compounds, guanylurea compounds (eg, guanylurea phosphate), melamine compounds (eg, polymelamine phosphate, melamine sulfate, melamine cyanurate) and polyphosphorus. Acid ammonium salts and the like.
  • the inorganic flame retardant is not particularly limited, and examples thereof include antimony trioxide, antimony pentoxide, magnesium hydroxide, and aluminum hydroxide.
  • a phosphorus-based flame retardant is preferable from the viewpoint of enhancing the anti-burning property of urethane foam by uniformly dispersing the flame retardant, and trixylenyl phosphate and tricresyl phosphate are preferable. More preferred.
  • the second component (Y) according to the present embodiment contains isocyanate (C).
  • isocyanate (C) examples include an aliphatic isocyanate, an alicyclic isocyanate, an aromatic isocyanate, and an araliphatic isocyanate.
  • aliphatic isocyanate examples include tetramethylene diisocyanate, dodecamethylene diisocyanate, hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, lysine diisocyanate, 2-methylpentane-1,2 Examples thereof include 5-diisocyanate and 3-methylpentane-1,5-diisocyanate.
  • alicyclic isocyanate examples include isophorone diisocyanate, hydrogenated xylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, 1,4-cyclohexane diisocyanate, methylcyclohexylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane and the like. be able to.
  • aromatic isocyanate examples include tolylene diisocyanate, diphenylmethane diisocyanate (MDI) polymethylene polyphenyl polyisocyanate, 4,4′-dibenzyl diisocyanate, 1,5-naphthylene diisocyanate, xylylene diisocyanate, 1,3-phenylene diisocyanate, 1,4-phenylene diisocyanate and the like can be mentioned.
  • MDI has three types of isomers, 2,2'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, and 4,4'-diphenylmethane diisocyanate.
  • araliphatic isocyanate examples include dialkyldiphenylmethane diisocyanate, tetraalkyldiphenylmethane diisocyanate, ⁇ , ⁇ , ⁇ , ⁇ -tetramethylxylylene diisocyanate.
  • isocyanate (C) for example, modified products of these isocyanates such as carbodiimide modified product, allophanate modified product, buret modified product, isocyanurate modified product, adduct modified product and the like can be used.
  • the isocyanate (C) preferably contains a urethane prepolymer (c-1) having an isocyanate group at the terminal.
  • the urethane prepolymer (c-1) is obtained, for example, by reacting a polyol (cp) with an isocyanate (ci) under conditions such that the number of isocyanate groups is excessive relative to the number of hydroxyl groups.
  • the isocyanate (ci) used for producing the urethane prepolymer (c-1) is not particularly limited, and examples thereof include the above-mentioned aliphatic isocyanates, alicyclic isocyanates, aromatic isocyanates, and araliphatic isocyanates. .
  • an aromatic isocyanate is preferable, and MDI and a modified MDI are more preferable.
  • the modified MDI include, but are not particularly limited to, a polymer, a urea, an allophanate, a biuret, a carbodiimide, a uretonimine, a uretdione, and an isocyanurate.
  • a carbodiimide modified is preferable.
  • the polyol (cp) is not particularly limited, and examples thereof include castor oil-based polyol, polyether polyol, low molecular weight glycol, polyester polyol, and polyolefin polyol.
  • a castor oil-based polyol is preferable from the viewpoint of enhancing the waterproofness of the urethane foam. If the waterproofness of the urethane foam is high, a waterproof function can be imparted to the entire battery pack, so that the battery pack can be appropriately protected from water drops and the like.
  • the castor oil-based polyol is not particularly limited, but castor oil, hydrogenated castor oil, transesterified castor oil and other fats and oils, reaction product of castor oil and polyhydric alcohol, castor oil fatty acid and polyhydric alcohol, And those obtained by addition-polymerizing an alkylene oxide thereto.
  • the urethane prepolymer (c-1) according to the present embodiment is particularly preferably obtained by reacting an aromatic isocyanate with a castor oil-based polyol.
  • the molar ratio (NCO / OH) between the isocyanate groups and the hydroxyl groups is preferably 0.6 to 1.5, and 0.7 to 1.3. Is more preferable.
  • the two-part curable resin composition according to the present embodiment includes, for example, a catalyst, a foam stabilizer (eg, a silicone foaming agent such as a polyalkylsiloxane-polyoxyalkylene block copolymer), a surfactant, and an antioxidant.
  • a foam stabilizer eg, a silicone foaming agent such as a polyalkylsiloxane-polyoxyalkylene block copolymer
  • a surfactant e.g., a polyalkylsiloxane-polyoxyalkylene block copolymer
  • an antioxidant e.g, a silicone foaming agent such as a polyalkylsiloxane-polyoxyalkylene block copolymer
  • Well-known additives such as antifungal agents, deodorants, dispersants, discoloration inhibitors, plasticizers, and fragrances may be contained within a range that does not impair the object of the present invention.
  • the two-component curable resin composition according to the present embodiment cures while foaming to form urethane foam.
  • the life of the battery may be affected.
  • the reaction heat at the time of curing is suppressed to a low level, so that the risk is small.
  • the heat generation temperature when the two-part curable resin composition is cured is preferably 80 ° C. or lower, more preferably 70 ° C. or lower.
  • the density of urethane foam as a potting material for a battery is preferably 0.7 g / cm 3 or less, more preferably 0.5 g / cm 3 or less, from the viewpoint of reducing the weight of the battery pack.
  • the hardness (Shore ⁇ C) of foamed urethane as a potting material for a battery is preferably from 10 to 60. This can reduce the damage to the battery due to the stress at the time of curing the resin, and can appropriately absorb the external impact of the battery pack.
  • the thermal conductivity of urethane foam as a potting material for a battery is preferably 0.05 to 0.20 (W / (m ⁇ K)).
  • the two-part curable resin composition according to the present embodiment is used for potting a battery. Specifically, after mixing the first component (X) and the second component (Y), the mixture is poured into a case or the like in which a battery is housed, thereby forming a foamed product that is a cured product of the two-component curable resin composition. A battery pack potted with urethane can be obtained.
  • the function of the two-component curable resin composition to prevent burning between batteries is particularly effectively exerted, for example, when two or more batteries (cells) are present in a battery pack. Further, it is preferable that the batteries in the battery pack are not arranged in a state of being in contact with each other, but are arranged via the urethane foam according to the present embodiment. In the battery pack, a case or the like for accommodating the battery is not always necessary, and the urethane foam potting the battery may be exposed.
  • composition corresponding to the first component (X) and the composition corresponding to the second component (Y) are separately distributed on the market, the composition corresponding to the first component (X)
  • the use of the composition for mixing and the composition corresponding to the second component (Y) for potting of a battery is equivalent to the practice of the present invention.
  • each component to be contained in the first component (X) may be sold separately or the like. Therefore, it should be understood that if a material equivalent to the above urethane foam is formed, the invention relating to the urethane foam corresponds to the embodiment.
  • Table 1 shows, for Examples 1 to 10 and Comparative Examples 1 to 5, the types and amounts (parts by mass) of the raw materials to be mixed with the first component (X) and the second component (Y), various ratios, and the like. And the results of the evaluation described below.
  • the various ratios are, specifically, the following (1) to (6).
  • a (c-1-1) isocyanate group-terminated urethane prepolymer used as a urethane prepolymer (c-1) having an isocyanate group at the terminal was prepared as follows. That is, castor oil was added to 1700 parts by mass of carbodiimide-modified MDI (Lupranate MM-103, manufactured by BASF INOAC Polyurethane Co.) previously charged in a 1-liter 4-neck round bottom flask equipped with a nitrogen inlet tube, a cooling condenser, a thermometer, and a stirrer. 300 parts by mass of (castor oil D manufactured by Ito Oil Co., Ltd.) was divided and charged. Then, the reaction was carried out at 60 ° C.
  • carbodiimide-modified MDI Liupranate MM-103, manufactured by BASF INOAC Polyurethane Co.
  • D [Flame retardant (D)] (D-1) trixylenyl phosphate (TXP), Daihachi Chemical Industry Co., Ltd. (D-2) tricresyl phosphate (TCP), Daihachi Chemical Industry Co., Ltd.
  • Thermal conductivity After mixing the first component (X) and the second component (Y) adjusted to 23 ° C. with a homodisper for 10 seconds, the mixture is allowed to stand for 24 hours in an environment of a temperature of 23 ° C. and a humidity of 50% to form a foam to be evaluated. Urethane is obtained. Thereafter, a 60 mm ⁇ 120 mm ⁇ 10 mm plate-shaped test piece was cut out from the urethane foam, and the test piece was subjected to thermal conductivity (W / () using a rapid thermal conductivity meter (QTM-710 manufactured by Kyoto Electronics Industry Co., Ltd.). m ⁇ K)).
  • the first component (X) and the second component (Y) adjusted to 23 ° C. are mixed by a homodisper for 10 seconds, and 100 g of the mixture is poured into a cylindrical polypropylene container having a bottom area of 38 cm 2 , and the temperature is 23 ° C., the humidity is 23 ° C. It was allowed to stand for 24 hours in an environment of 50% to obtain urethane foam to be evaluated. Thereafter, the polypropylene container was removed, and whether or not the urethane foam was contracted was visually checked. Specifically, when the urethane foam is contracted, for example, the side surface of the urethane foam is inwardly distorted.
  • the non-shrinkage of the urethane foam that is, whether or not the shrinkage of the urethane foam was suppressed, was evaluated based on the following criteria. ⁇ : Shrinkage cannot be confirmed. ⁇ : Shrinkage can be confirmed.
  • Example temperature The first component (X) and the second component (Y) adjusted to 23 ° C. were mixed by a homodisper for 10 seconds, and 100 g of the mixture was poured into a cylindrical polypropylene container having a bottom area of 38 cm 2 . Under an environment of a temperature of 23 ° C. and a humidity of 50%, the reaction temperature at the center of the resin composition during curing was measured using a thermocouple. The highest value among the measured values that change with time was defined as the exothermic temperature (° C.) according to this evaluation.
  • the urethane foam entered between the batteries, and a battery pack in a state of covering each battery was prepared.
  • nail test One of the three battery cells of the battery pack was nailed with a nail to ignite the battery cell. Then, it was confirmed whether or not the battery cell adjacent to the upper side or the lower side would burn, that is, whether or not any of the adjacent battery cells would ignite.
  • the nail has a length of 45 mm and a thickness of 2.45 mm.
  • the speed of the nail when piercing it was 30 mm / sec, and the depth of the piercing nail was 18 mm from the surface of the battery cell.
  • the anti-burning properties of the urethane foam were evaluated based on the following criteria. ⁇ : The adjacent battery cells did not burn x: The adjacent battery cells burned

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne une résine pour enrobage de batterie qui, bien que légère, est susceptible d'empêcher le feu de se propager entre des batteries. La composition de résine durcissable à deux liquides pour enrobage de batterie d'après la présente invention contient un premier composant (X) et un second composant (Y). Le premier composant (X) contient un polyol (A) et de l'eau (B). Le second composant (Y) contient un isocyanate (C). Le premier composant (X) et/ou le second composant (Y) contiennent un retardateur de flamme (D). Le polyol (A) contient un polyol (a-1) ayant un poids moléculaire supérieur ou égal à 2000. La quantité totale du retardateur de flamme (D) contenu dans le premier composant (X) et dans le second composant (Y) est comprise entre 25 et 75 parties en masse par rapport à un total de 100 parties en masse du premier composant (X) et du second composant (Y). La quantité totale du polyol (A) est comprise entre 20 et 150 parties en masse par rapport à un total de 100 parties en masse du retardateur de flamme (D).
PCT/JP2019/024537 2018-08-30 2019-06-20 Composition de résine durcissable à deux liquides pour enrobage de batterie WO2020044744A1 (fr)

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CN113861381A (zh) * 2021-10-13 2021-12-31 东莞市宏达聚氨酯有限公司 一种聚氨酯灌封胶及其制备方法
CN113861921A (zh) * 2021-09-03 2021-12-31 惠州锂威新能源科技有限公司 一种聚氨酯发泡胶及其制备方法及应用、软包锂离子电池
WO2022118974A1 (fr) * 2020-12-03 2022-06-09 日本発條株式会社 Matériau tampon pour éléments de batterie et batterie
WO2022188050A1 (fr) * 2021-03-10 2022-09-15 Dow Global Technologies Llc Composition de mousse de polyuréthane et son utilisation pour des produits d'enrobage
CN116874730A (zh) * 2023-08-09 2023-10-13 韦尔通科技股份有限公司 一种动力电池用发泡聚氨酯及其制备方法
WO2024052451A1 (fr) 2022-09-09 2024-03-14 Basf Se Matériau d'enrobage de batterie à adhérence améliorée au métal

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IT202100013880A1 (it) * 2021-05-27 2022-11-27 Permabond Eng Adhesives Ltd Matrice di resina sintetica, in particolare per i pacchi di batterie ricaricabili dei veicoli ad alimentazione elettrica e pacco di batterie realizzato con questa matrice
CN113717347B (zh) * 2021-09-14 2023-03-14 上海汇得科技股份有限公司 一种电池单元用聚氨酯泡沫灌封胶及其制备方法

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* Cited by examiner, † Cited by third party
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WO2022118974A1 (fr) * 2020-12-03 2022-06-09 日本発條株式会社 Matériau tampon pour éléments de batterie et batterie
WO2022188050A1 (fr) * 2021-03-10 2022-09-15 Dow Global Technologies Llc Composition de mousse de polyuréthane et son utilisation pour des produits d'enrobage
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CN113861381A (zh) * 2021-10-13 2021-12-31 东莞市宏达聚氨酯有限公司 一种聚氨酯灌封胶及其制备方法
WO2024052451A1 (fr) 2022-09-09 2024-03-14 Basf Se Matériau d'enrobage de batterie à adhérence améliorée au métal
CN116874730A (zh) * 2023-08-09 2023-10-13 韦尔通科技股份有限公司 一种动力电池用发泡聚氨酯及其制备方法

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