WO2017060990A1 - Corps de mousse et feuille de mousse - Google Patents

Corps de mousse et feuille de mousse Download PDF

Info

Publication number
WO2017060990A1
WO2017060990A1 PCT/JP2015/078507 JP2015078507W WO2017060990A1 WO 2017060990 A1 WO2017060990 A1 WO 2017060990A1 JP 2015078507 W JP2015078507 W JP 2015078507W WO 2017060990 A1 WO2017060990 A1 WO 2017060990A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
thermoplastic resin
meth
resin composition
acrylate
Prior art date
Application number
PCT/JP2015/078507
Other languages
English (en)
Japanese (ja)
Inventor
岡田美佳
土井浩平
加藤和通
徳山英幸
北原綱樹
高橋忠男
長崎国夫
松下喜一郎
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to PCT/JP2015/078507 priority Critical patent/WO2017060990A1/fr
Priority to CN201580001978.2A priority patent/CN107075166A/zh
Priority to KR1020167007271A priority patent/KR20180068830A/ko
Publication of WO2017060990A1 publication Critical patent/WO2017060990A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • C08J9/0014—Use of organic additives
    • C08J9/0028—Use of organic additives containing nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present invention relates to a foam and a foam sheet excellent in adhesion to metal and corrosion resistance, and an electric / electronic device using the foam sheet.
  • an image display member fixed to an image display device such as a liquid crystal display, an electroluminescence display, a plasma display, a display member attached to a so-called “mobile phone”, “smart phone”, “portable information terminal”, camera,
  • a foam material is used when an optical member such as a lens is fixed to a predetermined part (for example, a housing).
  • Examples of such a foam material include a low-foam, fine-cell urethane-based foam having a closed cell structure and a product obtained by compression molding a highly foamed urethane, and a polyethylene-based foam having a closed cell and an expansion ratio of about 30 times. It was used.
  • a gasket made of a polyurethane foam having a density of 0.3 to 0.5 g / cm 3 see Patent Document 1
  • Equipment sealing materials see Patent Document 2 and the like are used.
  • an adhesive-bonded foam sheet in which a pressure-sensitive adhesive is laminated or impregnated on a foam sheet is also known (see Patent Document 3).
  • a foam formed from a thermoplastic resin composition containing an azole ring-containing compound is not only excellent in corrosion resistance to metals, but is also adhered.
  • the present invention was completed by finding that the adhesion strength increases with time when it is attached to the body.
  • the present invention provides a foam formed from a thermoplastic resin composition containing a thermoplastic resin (a) and an azole ring-containing compound (b).
  • thermoplastic resin composition may further contain at least one surfactant.
  • thermoplastic resin (a) is preferably at least one polymer selected from the group consisting of acrylic polymers, rubbers, urethane polymers, and ethylene-vinyl acetate copolymers.
  • the azole ring-containing compound is preferably at least one compound selected from benzotriazole compounds and benzothiazole compounds.
  • the content of the azole ring-containing compound (b) in the thermoplastic resin composition is, for example, 0.2 to 5 parts by weight with respect to 100 parts by weight of the thermoplastic resin (a).
  • thermoplastic resin composition is a water-dispersed thermoplastic resin composition.
  • the foam has a density of 0.2 to 0.7 g / cm 3 , an average cell diameter of 10 to 150 ⁇ m, and a ratio of storage elastic modulus to loss elastic modulus at an angular frequency of 1 rad / s in dynamic viscoelasticity measurement.
  • a certain loss tangent (tan ⁇ ) may have a peak top in the range of ⁇ 30 ° C. to 30 ° C.
  • the maximum value of the loss tangent (tan ⁇ ) in the range of ⁇ 30 ° C. to 30 ° C. is preferably 0.2 or more.
  • the foam may have an initial elastic modulus of 5 N / mm 2 or less in a tensile test at a tensile rate of 300 mm / min in a 23 ° C. environment.
  • the present invention also provides a foam sheet comprising the foam.
  • the thickness of the foam sheet is, for example, 30 to 500 ⁇ m.
  • the adhesive strength to the copper foil (peeling angle 180 °, tensile speed 300 m / min) after the foam sheet is bonded to the copper foil and left at 80 ° C. for 1 day is preferably 2 N / 20 mm or more.
  • the foamed sheet is formed by mechanically foaming a water-dispersed thermoplastic resin composition containing the thermoplastic resin (a) and the azole ring-containing compound (b), and a mechanically foamed water-dispersed type. It may be formed through a process B in which the resin composition is applied onto a substrate and dried.
  • the foamed sheet is used, for example, as an impact absorbing sheet for electric / electronic devices.
  • the present invention further provides a laminate of the foam sheet and the heat conductive layer.
  • the present invention further provides an electric / electronic device in which the foam sheet or the laminate is used.
  • This electric / electronic device is an electric / electronic device provided with a display member, and has a structure in which the foam sheet or the laminate is sandwiched between a casing of the electric or electronic device and the display member. It may be a thing.
  • the foam is formed from the thermoplastic resin composition containing the azole ring-containing compound, not only is it excellent in corrosion resistance to metals, but even without providing an adhesive layer,
  • the adhesion (adhesion) with the adherend increases with time. This is presumably because the azole ring-containing compound contained in the foam moves to the interface with the adherend and interacts with the adherend. Therefore, it is possible to prevent positional deviation and peeling from the adherend, and it is possible to reduce the thickness by eliminating the need for an adhesive layer, and the thickness of other functional members can be ensured accordingly.
  • the foam has a specific density, a specific average cell diameter, and the loss tangent (tan ⁇ ) has a peak top in a specific temperature range, even if the thickness is small, the shock absorption is excellent. Even if an electric / electronic device using a foam sheet made of the foam of the present invention falls on the ground or the like, damage to the display or the like due to impact can be prevented.
  • the foam of the present invention is formed from a thermoplastic resin composition containing a thermoplastic resin (a) and an azole ring-containing compound (b).
  • thermoplastic resin (a) a thermoplastic resin is used as the resin material (polymer) constituting the foam. It does not specifically limit as a thermoplastic resin, The well-known thru
  • the thermoplastic resin include acrylic polymers, rubbers, urethane polymers, and ethylene-vinyl acetate copolymers. Among these, acrylic polymers, rubbers, and urethane polymers are preferable from the viewpoint of impact absorption.
  • the thermoplastic resin constituting the foam may be one kind alone, or two or more kinds.
  • the acrylic polymer contains (meth) acrylic acid alkyl ester as a main component.
  • (meth) acrylic-acid alkylester For example, (meth) acrylic-acid methyl, (meth) acrylic-acid ethyl, (meth) acrylic-acid propyl, (meth) acrylic-acid isopropyl, (meth) acrylic Acid butyl, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, hexyl (meth) acrylate, ( Heptyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate
  • the ratio of (meth) acrylic acid alkyl ester (for example, (meth) acrylic acid alkyl ester having an alkyl group having 1 to 20 carbon atoms) to the total amount of monomer components (all monomer components) constituting the acrylic polymer is as follows: For example, it is 50% by weight or more, preferably 60% by weight or more, more preferably 80% by weight or more, and further preferably 85% by weight or more.
  • the upper limit of the ratio of the (meth) acrylic acid alkyl ester to the total amount of monomer components constituting the acrylic polymer is, for example, 100% by weight, preferably 98% by weight, and more preferably 96% by weight.
  • the acrylic polymer may be a polymer containing only the (meth) acrylic acid alkyl ester as a constituent monomer component, but it is possible to impart functions according to necessity, more appropriately in adhesive properties.
  • the monomer component may be a polymer containing a copolymerizable monomer copolymerizable therewith with the above (meth) acrylic acid alkyl ester.
  • a copolymerizable monomer can be used individually by 1 type or in combination of 2 or more types.
  • Examples of the copolymerizable monomer include polar group-containing monomers. Although it does not specifically limit as said polar group containing monomer, For example, a nitrogen atom containing monomer, a carboxyl group containing monomer, a hydroxyl group containing monomer, a sulfonic acid group containing monomer, a phosphoric acid group containing monomer etc. are mentioned.
  • a polar group containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • the nitrogen atom-containing monomer is not particularly limited as long as it is a monomer (polymerizable compound) having a nitrogen atom and an ethylenically unsaturated bond in the molecule.
  • a cyano group-containing monomer such as (meth) acrylonitrile; (2-hydroxyethyl) (meth) acrylamide, N- (2-hydroxypropyl) (meth) acrylamide, N- (1-hydroxypropyl) (meth) acrylamide, N- (3-hydroxypropyl) (meth) acrylamide, N-hydroxyalkyl (meth) acrylamides such as N- (2-hydroxybutyl) (meth) acrylamide, N- (3-hydroxybutyl) (meth) acrylamide, N- (4-hydroxybutyl) (meth) acrylamide; N -(Meth) acryloylmorpholine, N- (meth) acrylo Cyclic (meth) acrylamides such as Rupirorijin
  • N-substituted (meth) acrylamide examples include N-alkyl (meth) acrylamides such as N-ethyl (meth) acrylamide and Nn-butyl (meth) acrylamide; N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N, N-dipropyl (meth) acrylamide, N, N-diisopropyl (meth) acrylamide, N, N-di (n-butyl) (meth) acrylamide, N, N-di (t And N, N-dialkyl (meth) acrylamide such as (butyl) (meth) acrylamide.
  • N-alkyl (meth) acrylamides such as N-ethyl (meth) acrylamide and Nn-butyl (meth) acrylamide
  • nitrogen atom-containing monomer examples include N-vinyl-2-pyrrolidone (NVP), N-vinyl-2-piperidone, N-vinyl-3-morpholinone, N-vinyl-2-caprolactam, and N-vinyl.
  • NDP N-vinyl-2-pyrrolidone
  • N-vinyl-2-piperidone N-vinyl-2-piperidone
  • N-vinyl-3-morpholinone N-vinyl-2-caprolactam
  • N-vinyl N-vinyl-2-caprolactam
  • N-vinyl cyclic amides such as 1,3-oxazin-2-one and N-vinyl-3,5-morpholinedione; aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, Monomers having amino groups such as N-dimethylaminopropyl (meth) acrylate; monomers having a maleimide skeleton such as N-cyclohexylmaleimide and N-phenylmaleimide; N-methylitaconimide, N-ethylitaconimide, N-butylitacon Imido, N-2-ethylhexylitaconimide, N-laur Ruitakon'imido and itaconimide monomers such as N- cyclohexyl itaconic imide.
  • a nitrogen atom containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • the carboxyl group-containing monomer is a monomer having one or more carboxyl groups in one molecule, but may be in the form of an anhydride. Although it does not specifically limit as said carboxyl group containing monomer, For example, (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, maleic anhydride, itaconic anhydride etc. are mentioned.
  • a carboxyl group-containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • hydroxyl group-containing monomer examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, ( 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl methacrylate Etc.
  • 2-hydroxyethyl (meth) acrylate 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 4-hydroxybutyl (meth) acrylate are preferable.
  • a hydroxyl-containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • sulfonic acid group-containing monomer examples include styrene sulfonic acid, allyl sulfonic acid, sulfopropyl (meth) acrylate, (meth) acryloyloxynaphthalene sulfonic acid, and the like.
  • a sulfonic acid group containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • phosphate group-containing monomer examples include 2-hydroxyethyl acryloyl phosphate.
  • a phosphate group containing monomer can be used individually by 1 type or in combination of 2 or more types.
  • the blending proportion of the polar group-containing monomer in the monomer component constituting the acrylic polymer is not particularly limited, but with respect to the total amount of monomer components constituting the acrylic polymer,
  • the lower limit is more preferably 3% by weight, and the upper limit is more preferably 20% by weight.
  • the polar group-containing monomer it is preferable to use at least a nitrogen atom-containing monomer.
  • the blending ratio of the nitrogen atom-containing monomer is preferably 1 to 30% by weight with respect to the total amount of monomer components constituting the acrylic polymer, the lower limit is more preferably 3% by weight, and the upper limit is more preferably 20% by weight.
  • the copolymerizable monomer has an alicyclic hydrocarbon group such as cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, bornyl (meth) acrylate, isobornyl (meth) acrylate, etc.
  • a polyfunctional monomer can be used as the copolymerizable monomer. According to such a polyfunctional monomer, a crosslinked structure can be introduced into the acrylic polymer, and the cohesive force of the pressure-sensitive adhesive layer can be adjusted.
  • the polyfunctional monomer include hexanediol di (meth) acrylate, butanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol.
  • the polyfunctional monomer is preferably a polyfunctional acrylic monomer.
  • the said polyfunctional monomer can be used individually or in combination of 2 or more types.
  • the rubber may be natural rubber or synthetic rubber.
  • examples of the rubber include nitrile rubber (NBR), methyl methacrylate-butadiene rubber (MBR), styrene-butadiene rubber (SBR), acrylic rubber (ACM, ANM), urethane rubber (AU), and silicone rubber.
  • NBR nitrile rubber
  • MRR methyl methacrylate-butadiene rubber
  • SBR styrene-butadiene rubber
  • ACM acrylic rubber
  • AU urethane rubber
  • silicone rubber silicone rubber.
  • urethane polymer examples include polycarbonate polyurethane, polyester polyurethane, and polyether polyurethane.
  • ethylene-vinyl acetate copolymer a known or well-known ethylene-vinyl acetate copolymer can be used.
  • the surface has tackiness when a foam (foamed sheet) is formed.
  • the surface of the foam (foamed sheet) has tackiness, it can be laminated with good adhesion to the adherend without providing an adhesive layer.
  • the Tg of the homopolymer is ⁇ A monomer having a temperature of less than 10 ° C. (for example, ⁇ 70 ° C. or more and less than ⁇ 10 ° C., preferably ⁇ 70 ° C.
  • thermoplastic resin (a) eg, acrylic
  • 70 to 98% by weight the lower limit is preferably 75% by weight and the upper limit is preferably 97% by weight
  • monomer components total amount of monomer components constituting the polymer
  • thermoplastic resin a loss tangent (tan ⁇ ) which is a ratio of a storage elastic modulus and a loss elastic modulus at an angular frequency of 1 rad / s in the dynamic viscoelasticity measurement of the foam.
  • a thermoplastic resin having a peak top in the range of ⁇ 30 ° C. to 30 ° C. is preferable.
  • the Tg of the thermoplastic resin can be used as an index or a standard.
  • the thermoplastic resin has a Tg of ⁇ 50 ° C. or more and less than 50 ° C. (the lower limit is preferably ⁇ 40 ° C., more preferably ⁇ 30 ° C., and the upper limit is preferably 40 ° C., more preferably 30 ° C.). It is preferred to select from a range of polymers.
  • the acrylic polymer when the thermoplastic resin is an acrylic polymer, the acrylic polymer includes a monomer having a homopolymer Tg of ⁇ 10 ° C. or more and a monomer having a homopolymer Tg of less than ⁇ 10 ° C.
  • An acrylic polymer formed as an essential monomer component is preferred.
  • the ratio of the storage elastic modulus and loss elastic modulus at an angular frequency of 1 rad / s in dynamic viscoelasticity measurement is obtained by adjusting the amount ratio of the former monomer and the latter monomer.
  • a foam having a loss tangent (tan ⁇ ) peak top in the range of ⁇ 30 ° C. to 30 ° C. can be obtained relatively easily.
  • Tg of homopolymer means “glass transition temperature (Tg) of homopolymer of the monomer”, specifically, “Polymer Handbook” (3rd edition, John Wiley & Sons). , Inc, 1987).
  • the Tg of a homopolymer of a monomer not described in the above document refers to, for example, a value obtained by the following measurement method (see JP 2007-51271 A). That is, in a reactor equipped with a thermometer, a stirrer, a nitrogen introduction tube and a reflux condenser, 100 parts by weight of monomer, 0.2 part by weight of 2,2′-azobisisobutyronitrile, and ethyl acetate 200 as a polymerization solvent.
  • a part by weight is charged and stirred for 1 hour while introducing nitrogen gas. After removing oxygen in the polymerization system in this way, the temperature is raised to 63 ° C. and the reaction is carried out for 10 hours. Next, the mixture is cooled to room temperature to obtain a homopolymer solution having a solid concentration of 33% by weight. Next, this homopolymer solution is cast-coated on a separator and dried to prepare a test sample (sheet-like homopolymer) having a thickness of about 2 mm.
  • This test sample was punched into a disk shape having a diameter of 7.9 mm, sandwiched between parallel plates, and subjected to a shear strain at a frequency of 1 Hz using a viscoelasticity tester (ARES, manufactured by Rheometrics). Viscoelasticity is measured in a shear mode at a heating rate of 150 ° C. and 5 ° C./min, and the peak top temperature of tan ⁇ is defined as Tg of the homopolymer. The Tg of the thermoplastic resin can also be measured by this method.
  • the Tg is, for example, ⁇ 10 ° C. to 250 ° C., preferably 10 to 230 ° C., more preferably 50 to 200 ° C.
  • Examples of the homopolymer having a Tg of ⁇ 10 ° C. or more include, for example, (meth) acrylonitrile; amide group-containing monomers such as (meth) acrylamide and N-hydroxyethyl (meth) acrylamide; (meth) acrylic acid; methacrylic acid (Meth) acrylic acid alkyl ester having a Tg of ⁇ 10 ° C.
  • homopolymer such as methyl and ethyl methacrylate; (meth) acrylate having an alicyclic hydrocarbon group such as isobornyl (meth) acrylate; N-vinyl— Examples thereof include heterocyclic ring-containing vinyl monomers such as 2-pyrrolidone (N-vinyl cyclic amide and the like); hydroxyl group-containing monomers such as 2-hydroxyethyl methacrylate and the like. These can be used individually by 1 type or in combination of 2 or more types. Among these, (meth) acrylonitrile (especially acrylonitrile) is particularly preferable.
  • the Tg is, for example, ⁇ 70 ° C. or more and less than ⁇ 10 ° C., preferably ⁇ 70 ° C. to ⁇ 12 ° C., more preferably ⁇ 65 ° C. to ⁇ 15 ° C. .
  • Examples of the homopolymer having a Tg of less than ⁇ 10 ° C. include, for example, (meth) acrylic acid alkyl esters having a homopolymer Tg of less than ⁇ 10 ° C., such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc. Is mentioned. These can be used individually by 1 type or in combination of 2 or more types. Among these, an acrylic acid alkyl ester having an alkyl group having 2 to 8 carbon atoms is particularly preferable.
  • the content of the monomer having a Tg of the homopolymer of ⁇ 10 ° C. or more with respect to the total amount of the monomer components constituting the acrylic polymer is preferably 2 to 30% by weight.
  • the lower limit is more preferably 3% by weight, still more preferably 4% by weight, and the upper limit is more preferably 25% by weight, still more preferably 20% by weight.
  • the content of the monomer having a Tg of the homopolymer of less than ⁇ 10 ° C. with respect to the total amount of the monomer components constituting the acrylic polymer is preferably 70 to 98% by weight.
  • the lower limit is more preferably 75% by weight, still more preferably 80% by weight, and the upper limit is more preferably 97% by weight, still more preferably 96% by weight.
  • the azole ring-containing compound (b) may be a compound having a 5-membered ring containing one or more nitrogen atoms in the ring, for example, a diazole (imidazole, pyrazole) ring, triazole ring, tetrazole ring, oxazole ring. , A compound having an isoxazole ring, a thiazole ring, or an isothiazole ring. These rings may be condensed with an aromatic ring such as a benzene ring to form a condensed ring.
  • Examples of the compound having such a condensed ring include a compound having a benzimidazole ring, a benzopyrazole ring, a benzotriazole ring, a benzoxazole ring, a benzoisoxazole ring, a benzothiazole ring, or a benzoisothiazole ring.
  • the azole ring and the condensed ring each may have a substituent.
  • substituents include alkyl groups having 1 to 6 carbon atoms (preferably 1 to 3 carbon atoms) such as methyl group, ethyl group, propyl group, isopropyl group and butyl group; methoxy group, ethoxy group, isopropyloxy
  • a compound in which an azole ring forms a condensed ring with an aromatic ring such as a benzene ring from the point of rust prevention action on a metal is preferable.
  • a benzotriazole-based compound a compound having a benzotriazole ring
  • a benzothiazole compound a compound having a benzothiazole ring
  • benzotriazole compounds include 1,2,3-benzotriazole, methylbenzotriazole, carboxybenzotriazole, carboxymethylbenzotriazole, and 1- [N, N-bis (2-ethylhexyl) aminomethyl] benzotriazole.
  • 1- [N, N-bis (2-ethylhexyl) aminomethyl] methylbenzotriazole, 2,2 ′-[[(methyl-1H-benzotriazol-1-yl) methyl] imino] bisethanol, or these A sodium salt etc. are mentioned.
  • benzothiazole compound examples include 2-mercaptobenzothiazole, 3- (2- (benzothiazolyl) thio) propionic acid, or a sodium salt thereof.
  • the azole ring-containing compound (b) may be used alone or in combination of two or more.
  • the content [solid content (nonvolatile content)] of the azole ring-containing compound (b) in the thermoplastic resin composition for forming the foam of the present invention impairs the adhesion to the adherend and the original properties of the foam.
  • 0.2 to 5 parts by weight is preferable with respect to 100 parts by weight of the thermoplastic resin (a) [solid content (nonvolatile content)].
  • the lower limit is more preferably 0.3 parts by weight, still more preferably 0.4 parts by weight, and the upper limit is more preferably 3 parts by weight, still more preferably 2 parts by weight.
  • thermoplastic resin composition for forming the foam of the present invention in addition to the thermoplastic resin (a) and the azole ring-containing compound (b), a surfactant, a crosslinking agent, and a thickening agent are added as necessary. Agents and other additives may be included.
  • the thermoplastic resin composition may contain an optional surfactant for reducing the bubble diameter and stabilizing the foamed foam.
  • the surfactant is not particularly limited, and any of an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, and the like may be used. From the viewpoint of the stability of the foam, an anionic surfactant is preferable, and a fatty acid ammonium surfactant such as ammonium stearate is more preferable.
  • Surfactant may be used individually by 1 type and may be used in combination of 2 or more type. Different surfactants may be used in combination, for example, an anionic surfactant and a nonionic surfactant, or an anionic surfactant and an amphoteric surfactant may be used in combination.
  • the addition amount [solid content (nonvolatile content)] of the surfactant is, for example, 0 to 10 parts by weight with respect to 100 parts by weight of the thermoplastic resin (a) [solid content (nonvolatile content)].
  • it is 0.5 part by weight, more preferably 1 part by weight, and the upper limit is preferably 8 parts by weight, more preferably 6 parts by weight.
  • thermoplastic resin composition may contain an arbitrary cross-linking agent in order to improve the strength, heat resistance and moisture resistance of the foam.
  • the crosslinking agent is not particularly limited, and any of oil-soluble and water-soluble may be used.
  • examples of the crosslinking agent include epoxy, oxazoline, isocyanate, carbodiimide, melamine, and metal oxide. Among these, an oxazoline-based crosslinking agent is preferable.
  • the addition amount [solid content (nonvolatile content)] of the crosslinking agent is, for example, 0 to 10 parts by weight with respect to 100 parts by weight of the thermoplastic resin (a) [solid content (nonvolatile content)], and the lower limit is preferably Is 0.01 part by weight, more preferably 0.1 part by weight, and the upper limit is preferably 9 parts by weight, more preferably 8 parts by weight.
  • thermoplastic resin composition may contain an arbitrary thickener for improving the stability of the foamed foam and the film-forming property.
  • the thickener is not particularly limited, and examples thereof include acrylic acid type, urethane type, and polyvinyl alcohol type. Of these, polyacrylic acid thickeners are preferred.
  • the addition amount of the thickener is, for example, 0 to 10 parts by weight with respect to 100 parts by weight of the thermoplastic resin (a) [solid content (nonvolatile content)].
  • it is 0.1 weight part, More preferably, it is 0.3 weight part, An upper limit becomes like this.
  • it is 6 weight part, More preferably, it is 3 weight part.
  • thermoplastic resin composition may contain any appropriate other component as long as it does not impair the corrosion resistance to metal, adhesion to the adherend, and the original properties of the foam. .
  • Such other components may contain only 1 type and may contain 2 or more types.
  • the other components include polymer components other than the thermoplastic resin (a), softeners, antioxidants, anti-aging agents, rust inhibitors, gelling agents, curing agents, plasticizers, fillers, and reinforcing agents. , Foaming agents, flame retardants, light stabilizers, ultraviolet absorbers, colorants (such as pigments and dyes), pH adjusters, thermal polymerization initiators, photopolymerization initiators, and the like.
  • the filler examples include silica, clay (mica, talc, smectite, etc.), alumina, titania, zinc oxide, tin oxide, zeolite, graphite, carbon nanotube, inorganic fiber (carbon fiber, glass fiber, etc.), and organic fiber. And metal powder (silver, copper, etc.).
  • piezoelectric particles such as titanium oxide
  • conductive particles such as boron nitride
  • organic fillers such as silicone powder
  • the thermoplastic resin composition may be any of a water-dispersed thermoplastic resin composition, a solvent-type thermoplastic resin composition, and a thermoplastic resin composition that does not contain water and a solvent.
  • the foam of the present invention can be produced by subjecting the thermoplastic resin composition to foaming.
  • the foam sheet of the present invention can be produced by subjecting the thermoplastic resin composition to foam molding and forming a sheet.
  • the foaming method bubble forming method
  • methods usually used for foam molding such as physical methods and chemical methods, can be employed.
  • the physical method is to disperse a gas component such as air or nitrogen in a polymer solution and form bubbles by mechanical mixing.
  • the chemical method is a method of obtaining a foam by forming cells with a gas generated by thermal decomposition of a foaming agent added to a polymer base. From the viewpoint of environmental problems, a physical method is preferable. Bubbles formed by physical methods are often open cells.
  • thermoplastic resin composition to be subjected to foaming a thermoplastic resin composition not containing water and a solvent, or a resin solution (solvent type thermoplastic resin composition) in which a thermoplastic resin is dissolved in a solvent is used.
  • a resin solution solvent type thermoplastic resin composition
  • emulsion you may blend and use 2 or more types of emulsion.
  • the solid content concentration of the emulsion is preferably higher from the viewpoint of film formability.
  • the solid content concentration of the emulsion is preferably 30% by weight or more, more preferably 40% by weight or more, and further preferably 50% by weight or more.
  • a method of producing a foam through a step of foaming mechanically foaming a water-dispersed thermoplastic resin composition (emulsion resin composition) (step A) is preferable.
  • the foaming device is not particularly limited, and examples thereof include a high-speed shearing method, a vibration method, and a pressurized gas discharge method. Among these, the high-speed shearing method is preferable from the viewpoint of finer bubble diameter and production of a large capacity.
  • Bubbles when foamed by mechanical stirring are gas (gas) taken into the emulsion.
  • the gas is not particularly limited as long as it is inert to the emulsion, and examples thereof include air, nitrogen, carbon dioxide and the like. Among these, air is preferable from the viewpoint of economy.
  • the foamed sheet of the present invention can be obtained through a step (Step B) in which the emulsion resin composition foamed by the above method is applied onto a substrate and dried.
  • the substrate is not particularly limited, and examples thereof include a peeled plastic film (such as a peeled polyethylene terephthalate film), a plastic film (such as a polyethylene terephthalate film), and a heat conductive layer (such as a heat conductive layer described below). Can be mentioned.
  • Step B a general method can be adopted as a coating method and a drying method.
  • Step B includes a preliminary drying step B1 for drying the bubble-containing emulsion resin composition applied on the substrate at 50 ° C. or higher and lower than 125 ° C., and then a main drying step B2 for further drying at 125 ° C. or higher and 200 ° C. or lower. Preferably it is.
  • the temperature in the preliminary drying step B1 is preferably 50 ° C. or higher and 100 ° C. or lower.
  • the time of the preliminary drying step B1 is, for example, 0.5 minutes to 30 minutes, preferably 1 minute to 15 minutes.
  • the temperature in this drying process B2 becomes like this. Preferably they are 130 degreeC or more and 180 degrees C or less.
  • the time of the main drying step B2 is, for example, 0.5 minutes to 30 minutes, preferably 1 minute to 15 minutes.
  • the foam of the present invention has a density of 0.2 to 0.7 g / cm 3 , an average cell diameter of 10 to 150 ⁇ m, and a storage elastic modulus and a loss elastic modulus at an angular frequency of 1 rad / s in dynamic viscoelasticity measurement. It is preferable that the loss tangent (tan ⁇ ) as a ratio has a peak top in the range of ⁇ 30 ° C. to 30 ° C. Such a foam has high shock absorption. In the present specification, the density of the foam means “apparent density”.
  • the lower limit of the density of the foam is more preferably 0.21 g / cm 3 , still more preferably 0.22 g / cm 3
  • the upper limit is more preferably 0.6 g / cm 3 , still more preferably 0.5 g. / Cm 3 , particularly preferably 0.4 g / cm 3 .
  • the density of the foam can be adjusted to a density of 0.2 to 0.7 g / cm 3 by adjusting the amount of gas (gas) component taken into the emulsion resin composition during mechanical stirring.
  • the lower limit of the average cell diameter of the foam is more preferably 15 ⁇ m, still more preferably 20 ⁇ m, and the upper limit is more preferably 140 ⁇ m, still more preferably 130 ⁇ m.
  • the average cell diameter of the foam can be set in the range of 10 to 150 ⁇ m by adjusting the type and amount of the surfactant and by adjusting the stirring speed and stirring time during mechanical stirring.
  • the peak top of the loss tangent (tan ⁇ ), which is the ratio of the storage elastic modulus and the loss elastic modulus at an angular frequency of 1 rad / s in the dynamic viscoelasticity measurement of the foam, is ⁇ 30 ° C. or higher and 30 ° C. or higher. It is preferable to be in the following range.
  • the lower limit of the temperature range where the loss tangent peak top exists is more preferably ⁇ 25 ° C., further preferably ⁇ 20 ° C., and the upper limit is more preferably 20 ° C., and further preferably 10 ° C. In the case of a material having two or more peak tops of loss tangents, it is desirable that at least one of them falls within the above range.
  • the peak temperature is ⁇ 30 ° C. or higher, excellent compression recovery is exhibited.
  • the peak temperature is 30 ° C. or lower, high flexibility is exhibited and excellent shock absorption is exhibited.
  • the peak top strength (maximum value) of loss tangent (tan ⁇ ) in the range of ⁇ 30 ° C. or higher and 30 ° C. or lower is preferably higher from the viewpoint of shock absorption, for example, 0.2 or higher, preferably 0.3 or higher.
  • the upper limit value of the peak top intensity (maximum value) is, for example, 2.0.
  • the peak temperature and peak top strength of the loss tangent (tan ⁇ ) greatly contribute to the shock absorption of the foam.
  • the peak top of the loss tangent (tan ⁇ ) which is the ratio of the storage elastic modulus and loss elastic modulus at the angular frequency of 1 rad / s in the dynamic viscoelasticity measurement of the foam, is in the range of ⁇ 30 ° C. or higher and 30 ° C. or lower.
  • the loss tangent (tan ⁇ ) peak exists at a location that matches the frequency of impact. That is, the range where the loss tangent (tan ⁇ ) is ⁇ 30 ° C. or higher and 30 ° C.
  • the storage elastic modulus is a repulsive force with respect to the impact energy applied to the foam sheet. If the storage elastic modulus is high, the impact is repelled as it is.
  • the loss elastic modulus is a physical property that changes impact energy applied to the foam sheet to heat, and the higher the loss elastic modulus is, the more the impact energy is changed to heat, so the impact is absorbed and the strain is reduced.
  • the initial elastic modulus of the foam is preferably low from the viewpoint of impact absorption.
  • the initial elastic modulus (a value calculated from a slope at the time of 10% strain in a tensile test under a 23 ° C. environment and a tensile speed of 300 mm / min) is preferably 5 N / mm 2 or less, more preferably 3 N / mm 2. It is as follows.
  • the lower limit value of the initial elastic modulus is, for example, 0.1 N / mm 2 .
  • the foam can be formed by subjecting the thermoplastic resin composition to foaming, but the foamed resin composition (solid matter) [molded without foaming the thermoplastic resin composition]
  • the peak top of the loss tangent (tan ⁇ ) which is the ratio of the storage elastic modulus to the loss elastic modulus at an angular frequency of 1 rad / s in the dynamic viscoelasticity measurement, is preferably in the range of ⁇ 30 ° C. to 30 ° C.
  • the lower limit of the temperature range where the peak tangent of the loss tangent exists is more preferably ⁇ 20 ° C., further preferably ⁇ 10 ° C., and the upper limit is more preferably 20 ° C., further preferably 10 ° C.
  • the peak top strength of (tan ⁇ ) is equivalent to a value obtained by dividing the peak top strength by the foam density (g / cm 3 ).
  • the initial elastic modulus (23 ° C., tensile speed 300 mm / min) of the unfoamed resin composition (solid material) is desirably lower, preferably 50 N / mm 2 or less, more preferably 30 N / mm 2. It is as follows.
  • the lower limit value of the initial elastic modulus is, for example, 0.3 N / mm 2 .
  • the cell structure of the foam may be any of an open cell structure, a closed cell structure, or a semi-continuous semi-closed cell structure. From the viewpoint of impact absorption, an open cell structure and a semi-open semi-closed cell structure are preferable.
  • the thickness of the foam sheet of the present invention is not particularly limited, and can be selected according to the application.
  • the thickness of the foam sheet is about 30 to 2000 ⁇ m.
  • the thickness of the foamed sheet is preferably in the range of 30 to 500 ⁇ m.
  • the lower limit is more preferably 40 ⁇ m, still more preferably 50 ⁇ m, and the upper limit is more preferably 400 ⁇ m, still more preferably 300 ⁇ m.
  • the thickness of the foamed sheet is 30 ⁇ m or more, bubbles can be contained uniformly, and excellent shock absorption can be exhibited.
  • the thickness of the foamed sheet is 500 ⁇ m or less, it is possible to easily follow a minute clearance.
  • the peak top of the loss tangent (tan ⁇ ), which is the ratio between the storage elastic modulus and the loss elastic modulus at an angular frequency of 1 rad / s in the dynamic viscoelasticity measurement of the foam as described above, is ⁇ 30 ° C. or higher and 30 ° C. or lower.
  • the foam sheet in the range has high shock absorption even if the thickness is as thin as 30 to 500 ⁇ m.
  • the impact absorption can be adjusted by selecting the average cell diameter, density, etc., but when the thickness of the foamed sheet is very small (for example, a thickness of 30 to 200 ⁇ m). ), It is not possible to absorb the shock sufficiently by adjusting these characteristics. This is because when the thickness of the foam sheet is very thin, the bubbles in the foam are immediately crushed by the impact and the shock buffering function by the bubbles is lost.
  • the peak top of the loss tangent (tan ⁇ ) which is the ratio of the storage elastic modulus and loss elastic modulus at an angular frequency of 1 rad / s in the dynamic viscoelasticity measurement of the foam, is in the range of ⁇ 30 ° C. to 30 ° C. Even after the bubbles are crushed, the constituent material of the foam exerts the function of buffering the impact.
  • the ratio of the average cell diameter ( ⁇ m) to the thickness of the foamed sheet ( ⁇ m) is preferably in the range of 0.2 to 0.9 from the viewpoint of shock absorption.
  • the lower limit of the ratio of the average cell diameter ( ⁇ m) to the thickness of the foamed sheet ( ⁇ m) is preferably 0.25, more preferably 0.3, and the upper limit is preferably 0.85, more preferably 0. .8.
  • the adhesive force to the adherend gradually increases with time. Therefore, high adhesion reliability can be obtained.
  • the adhesive strength to copper foil peeling angle 180 °, tensile speed 300 m / min
  • the foam sheet of this invention can be adhere
  • the adhesive force to copper foil (initial adhesive force) (peeling angle 180 °, tensile speed 300 m / min) immediately after the foam sheet of the present invention is bonded to the copper foil is, for example, 0.03 N / 20 mm or more. Preferably, it may be about 0.03 to 1 N / 20 mm (or about 0.05 to 0.5 N / 20 mm).
  • the foamed sheet of the present invention may be provided with an adhesive layer (adhesive layer) on one or both sides of the foamed sheet, if necessary.
  • an adhesive which comprises an adhesive layer
  • any of an acrylic adhesive, a rubber adhesive, a silicone adhesive, etc. may be sufficient.
  • the foamed sheet of the present invention may be distributed on the market as a wound body (rolled material) wound in a roll shape.
  • the foamed sheet of the present invention contains an azole ring-containing compound as described above, corrosion of the metal can be prevented for a long time when it is placed in contact with a metal member such as a metal foil. Also, the azole ring-containing compound contained in the foamed sheet moves to the interface with the adjacent member (adhered body) and interacts with the adjacent member, or the adhesive force increases with time. Therefore, the adhesive layer is unnecessary and thinning is possible, and the thickness of the other material can be secured by the thickness of the adhesive layer.
  • members for electrical / electronic equipment used when attaching (attaching) various members or components (eg, optical members) to a predetermined part (eg, housing)
  • a shock absorbing sheet it is useful as a shock absorbing sheet.
  • the member (adhered body) on at least one surface side of the foam sheet is a metal member (for example, a metal foil such as a copper foil, an aluminum foil, a gold foil, or a silver foil).
  • an image display member attached to an image display device such as a liquid crystal display, an electroluminescence display, a plasma display (particularly, a small image display).
  • display members such as touch panels attached to mobile communication devices such as so-called “mobile phones”, “smartphones” and “portable information terminals”, cameras and lenses (particularly small cameras and lenses), etc.
  • mobile communication devices such as so-called “mobile phones”, “smartphones” and “portable information terminals”, cameras and lenses (particularly small cameras and lenses), etc.
  • the laminate of the present invention is a laminate (sheet-like laminate) of a foam sheet (foam sheet layer) and a heat conductive layer.
  • the thermal conductivity of the thermal conductive layer is preferably 200 W / m ⁇ K or more.
  • the thermal conductivity is a value measured from a steady method.
  • the thermal conductivity of the heat conductive layer is preferably 300 W / m ⁇ K or more, more preferably 400 W / m ⁇ K or more.
  • the thermal conductivity of the thermal conductive layer is 200 W / m ⁇ K or more, excellent thermal diffusibility (heat dissipation) is exhibited.
  • a practical upper limit of the thermal conductivity is, for example, 1500 W / m ⁇ K.
  • the thickness of the heat conductive layer can be adjusted to any appropriate thickness depending on the purpose.
  • the thickness of the heat conductive layer is preferably 5 ⁇ m or more, more preferably 7 ⁇ m or more.
  • the upper limit of the thickness of the heat conductive layer is, for example, 130 ⁇ m, preferably 120 ⁇ m, and more preferably 110 ⁇ m.
  • Examples of the heat conductive layer include a graphite sheet and a metal foil.
  • Examples of the metal foil material include aluminum, gold, silver, and copper.
  • As the metal foil an aluminum foil, a copper foil or the like having a high far-infrared reflectance and a low process cost is preferable.
  • a method for producing the laminated body a method of transferring (attaching) a foam sheet to a heat conductive layer, applying the foamed emulsion resin composition to a heat conductive layer, and drying to form a foam sheet layer
  • the method of doing is mentioned.
  • the latter method produces higher adhesive strength than the former method.
  • the laminate of the present invention since it has a foam sheet and a heat conductive layer, it is excellent in impact absorption and thermal diffusibility (heat dissipation). Moreover, since the adhesive force between the foam sheet and the heat conductive layer and the adhesive force between the adjacent member and the foam sheet when using the laminate of the present invention increase with time, the adhesive reliability is excellent. Further, when the heat conductive layer is a metal, corrosion of the metal can be prevented for a long time when the metal and the adjacent member when using the laminate of the present invention are metal.
  • various members or parts for example, optical members are used for attaching (attaching) a predetermined part (for example, a housing) to a member for electrical / electronic devices,
  • a predetermined part for example, a housing
  • it is useful as a thermal diffusion shock absorbing sheet.
  • optical member that can be mounted (mounted) using the laminate of the present invention is the same as the optical member that can be mounted using the foamed sheet of the present invention.
  • the electrical / electronic device of the present invention uses the foamed sheet or laminate of the present invention.
  • Such an electric / electronic device is, for example, an electric / electronic device provided with a display member, and the foam sheet or laminate is sandwiched between the casing of the electric or electronic device and the display member.
  • An electric / electronic device having a structured structure is included. Examples of the electric / electronic devices include mobile communication devices such as so-called “mobile phones”, “smartphones”, and “portable information terminals”.
  • % representing the content means% by weight.
  • all the compounding parts are values in terms of solid content (non-volatile content).
  • Example 1 100 parts by weight of acrylic emulsion solution (solid content 55%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)), fatty acid ammonium surfactant (aqueous dispersion of ammonium stearate, 3 parts by weight of solid content 33%), oxazoline crosslinking agent (Epocross WS-500, manufactured by Nippon Shokubai Co., Ltd., solid content 39%) 0.35 parts by weight, benzotriazole sodium salt (solid content 40%) 1 part by weight, poly Stir and mix 0.8 parts by weight of acrylic thickener (ethyl acrylate-acrylic acid copolymer (acrylic acid 20% by weight), solid content 28.7%) with Disper ("Robomix” Primix) And foamed.
  • acrylic emulsion solution solid content 55%, ethyl acrylate-butyl acrylate-acrylonitrile copolymer (weight ratio 45: 48: 7)
  • This foamed composition was applied onto a release-treated PET (polyethylene terephthalate) film (thickness: 38 ⁇ m, trade name “MRF # 38” manufactured by Mitsubishi Plastics), 70 ° C. for 4.5 minutes, and 140 ° C. It was dried for 4.5 minutes to obtain a foam (foamed sheet) having an open cell structure having a thickness of 130 ⁇ m, a density of 0.29 g / cm 3 and an average cell diameter of 85 ⁇ m.
  • Example 2 The same operation as in Example 1 was carried out except that the amount of benzotriazole sodium salt (solid content 40%) was 1.5 parts by weight to obtain a foam (foamed sheet) having an open cell structure having a thickness of 130 ⁇ m. .
  • the foam had a density of 0.3 g / cm 3 and an average cell diameter of 80 ⁇ m.
  • Example 3 The same operation as in Example 1 was carried out except that the amount of benzotriazole sodium salt (solid content 40%) was changed to 0.5 parts by weight to obtain a foam (foamed sheet) having an open cell structure having a thickness of 130 ⁇ m. .
  • the foam had a density of 0.38 g / cm 3 and an average cell diameter of 70 ⁇ m.
  • Example 1 Except that benzotriazole sodium salt (solid content 40%) was not used at all, the same operation as in Example 1 was carried out to obtain a foam (foamed sheet) having an open cell structure of 130 ⁇ m in thickness.
  • the foam had a density of 0.43 g / cm 3 and an average cell diameter of 72 ⁇ m.
  • An average cell diameter ( ⁇ m) was obtained by capturing an enlarged image of the foam cross section with a low vacuum scanning electron microscope (“S-3400N scanning electron microscope” manufactured by Hitachi High-Tech Science Systems) and analyzing the image. The number of bubbles analyzed is about 10 to 20.
  • a foam (foamed sheet) is punched with a 100 mm ⁇ 100 mm punching blade mold, and the dimensions of the punched sample are measured. Further, the thickness is measured with a 1/100 dial gauge having a measurement terminal diameter ( ⁇ ) of 20 mm. The volume of the foam was calculated from these values. Next, the weight of the foam is measured with an upper pan balance having a minimum scale of 0.01 g or more. From these values, the density (g / cm 3 ) of the foam was calculated.
  • the initial elastic modulus (N / mm 2 ) calculated from the slope at 10% strain in a tensile test at a tensile speed of 300 mm / min in a 23 ° C. environment was evaluated.
  • Adhesive strength An adhesive tape (No. 31B, manufactured by Nitto Denko Corporation) was bonded to one surface of the foam (foamed sheet; a release sheet laminated on one side) obtained in each Example and each Comparative Example. This was cut into a size of 20 mm ⁇ 100 mm to obtain an evaluation sample. The release sheet was peeled off, the other surface of the foam was attached to a copper foil as an adherend at 25 ° C., and a 5 Kg roller was reciprocated once for pressure bonding.
  • the foam and the foam sheet of the present invention are used for attaching (attaching) various members or parts (for example, optical members) to a predetermined part (for example, a housing) in an electric / electronic device.
  • a predetermined part for example, a housing
  • an electric / electronic device for example, a housing
  • the foam and foam sheet of the present invention are excellent in adhesion to metal and corrosion resistance
  • the member (adhered body) on at least one surface side of the foam sheet is a metal member (for example, copper foil, aluminum foil). , Gold foil, metal foil such as silver foil, etc.).
  • Test piece (foamed sheet) 2 Copper foil 3 Acrylic plate 4 Clip

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'invention concerne un corps en mousse ayant une excellente résistance à la corrosion par des métaux et une excellente adhésivité à une partie adhérée même si une couche adhésive n'est pas prévue. Ce corps de mousse est formé à partir d'une composition de résine thermoplastique comprenant une résine thermoplastique (a) et un composé contenant un anneau d'azole (b). La composition de résine thermoplastique peut en outre contenir au moins un type de tensioactif. Au moins un type de polymère choisi dans le groupe constitué de polymère acrylique, de caoutchouc, de polymère d'uréthane et de copolymère d'acétate d'éthylène-vinyle est préféré en tant que résine thermoplastique (a).
PCT/JP2015/078507 2015-10-07 2015-10-07 Corps de mousse et feuille de mousse WO2017060990A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2015/078507 WO2017060990A1 (fr) 2015-10-07 2015-10-07 Corps de mousse et feuille de mousse
CN201580001978.2A CN107075166A (zh) 2015-10-07 2015-10-07 发泡体及发泡片
KR1020167007271A KR20180068830A (ko) 2015-10-07 2015-10-07 발포체 및 발포 시트

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/078507 WO2017060990A1 (fr) 2015-10-07 2015-10-07 Corps de mousse et feuille de mousse

Publications (1)

Publication Number Publication Date
WO2017060990A1 true WO2017060990A1 (fr) 2017-04-13

Family

ID=58488243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/078507 WO2017060990A1 (fr) 2015-10-07 2015-10-07 Corps de mousse et feuille de mousse

Country Status (3)

Country Link
KR (1) KR20180068830A (fr)
CN (1) CN107075166A (fr)
WO (1) WO2017060990A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237645A (ja) * 2006-03-10 2007-09-20 Fujikura Ltd 発泡成形方法、発泡同軸ケーブル及び発泡同軸ケーブルの製造方法
JP2008019379A (ja) * 2006-07-14 2008-01-31 Fujikura Ltd 発泡用樹脂組成物用のマスターバッチ、発泡同軸ケーブル及びその製造方法
JP2011173941A (ja) * 2010-02-23 2011-09-08 Toray Ind Inc ポリオレフィン系樹脂架橋発泡体
WO2015029879A1 (fr) * 2013-08-26 2015-03-05 日東電工株式会社 Feuille de mousse
JP2015203063A (ja) * 2014-04-14 2015-11-16 日東電工株式会社 発泡体及び発泡シート

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2633714B2 (ja) 1990-06-11 1997-07-23 東洋ケミテック 株式会社 粘接着フォームシートおよびその製造方法
JP2001100216A (ja) 1999-09-27 2001-04-13 Rogers Inoac Corp ガスケット
JP4125875B2 (ja) 2001-04-13 2008-07-30 日東電工株式会社 電気・電子機器用シール材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237645A (ja) * 2006-03-10 2007-09-20 Fujikura Ltd 発泡成形方法、発泡同軸ケーブル及び発泡同軸ケーブルの製造方法
JP2008019379A (ja) * 2006-07-14 2008-01-31 Fujikura Ltd 発泡用樹脂組成物用のマスターバッチ、発泡同軸ケーブル及びその製造方法
JP2011173941A (ja) * 2010-02-23 2011-09-08 Toray Ind Inc ポリオレフィン系樹脂架橋発泡体
WO2015029879A1 (fr) * 2013-08-26 2015-03-05 日東電工株式会社 Feuille de mousse
JP2015203063A (ja) * 2014-04-14 2015-11-16 日東電工株式会社 発泡体及び発泡シート

Also Published As

Publication number Publication date
CN107075166A (zh) 2017-08-18
KR20180068830A (ko) 2018-06-22

Similar Documents

Publication Publication Date Title
JP6683766B2 (ja) 両面粘着シート
WO2016047612A1 (fr) Feuille en mousse
TWI714541B (zh) 黏著片材
JP6386832B2 (ja) 発泡シート
JP6722245B2 (ja) 光学用粘着剤層、粘着シート、光学部材、及びタッチパネル
KR102165850B1 (ko) 열방사성 필름 및 열방사성 점착 테이프
JP6363156B2 (ja) 電池用粘着シートおよびリチウムイオン電池
WO2010131721A1 (fr) Bande ou feuille autoadhésive décollable par la chaleur et sensible à la pression
JP6343478B2 (ja) 積層体及びその製造方法
JP6632891B2 (ja) 低粘着性発泡シート
JP2021024907A (ja) 両面粘着テープ
KR101500467B1 (ko) 적층체
EP2662428A1 (fr) Feuille adhésive sensible à la pression pour la protection de surface métallique
JP6343165B2 (ja) 発泡体及び発泡シート
WO2017060990A1 (fr) Corps de mousse et feuille de mousse
WO2016121788A1 (fr) Feuille en mousse faiblement adhésive
WO2022054788A1 (fr) Feuille adhésive

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 20167007271

Country of ref document: KR

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15905810

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15905810

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP