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WO2019124405A1 - Ruban adhésif double face - Google Patents

Ruban adhésif double face Download PDF

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Publication number
WO2019124405A1
WO2019124405A1 PCT/JP2018/046646 JP2018046646W WO2019124405A1 WO 2019124405 A1 WO2019124405 A1 WO 2019124405A1 JP 2018046646 W JP2018046646 W JP 2018046646W WO 2019124405 A1 WO2019124405 A1 WO 2019124405A1
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WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
double
adhesive tape
acrylic
pressure
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/046646
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English (en)
Japanese (ja)
Inventor
孝嗣 深石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP2019514068A priority Critical patent/JP7157047B2/ja
Publication of WO2019124405A1 publication Critical patent/WO2019124405A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/26—Porous or cellular plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]

Definitions

  • the present invention relates to a double-sided adhesive tape. More specifically, the present invention relates to, for example, a double-sided pressure-sensitive adhesive tape on which a vehicle member or the like is to be attached.
  • Adhesive tapes are widely used for the purpose of curing, packing, repair and the like because they are excellent in workability.
  • a pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer is excellent in various physical properties such as weather resistance, durability, heat resistance, transparency and the like, and therefore, for fixing members in vehicles, homes, electronic devices, etc. It is widely used (for example, patent document 1).
  • the double-sided pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer provided on both sides of a substrate is used, for example, for fixing vehicle exterior parts such as weather strips and dam rubbers which are members around glass of vehicles. are known.
  • the double-sided pressure-sensitive adhesive tape is required to have various physical properties such as adhesive strength and water fastness.
  • a technique of using an olefin-based foam such as polyethylene is disclosed, and it is disclosed that water fastness and the like become good (for example, Patent Document 2).
  • the adherends are fixed to each other by the double-sided pressure-sensitive adhesive tape
  • the follow-up property to the adherend shape of the double-sided pressure-sensitive adhesive tape is If it is bad, a gap may be generated, and the water blocking property may be reduced.
  • many parts such as exterior parts for vehicles mentioned above use soft polyvinyl chloride resin as a raw material, and when fixing this with double-sided adhesive tape, aging of adhesive force of double-sided adhesive tape As a result, there was a possibility that the water fastness might be lowered due to the drop of the adherend or the formation of a gap between the adherend and the double-sided pressure-sensitive adhesive tape.
  • the present invention has been made in view of the above problems, and in the case where the surface of the adherend has unevenness, and even if the adherend is made of a soft polyvinyl chloride resin as a raw material. It is an object of the present invention to provide a double-sided pressure-sensitive adhesive tape in which adhesion is maintained high and water fastness is also good.
  • the inventors of the present invention conducted intensive studies to achieve the above object. As a result, it is found that a double-sided pressure-sensitive adhesive tape having a specific acrylic pressure-sensitive adhesive layer on both sides thereof and having a specific physical property can be solved by using the acrylic resin foam pressure-sensitive adhesive layer of a specific thickness as a substrate.
  • the present invention has been completed. That is, the present invention relates to the following [1] to [17].
  • a double-sided pressure-sensitive adhesive tape comprising a foam substrate and an acrylic pressure-sensitive adhesive layer provided on both surfaces of the substrate, wherein the foam substrate comprises an acrylic polymer (X2)
  • An acrylic polymer which is a resin foam adhesive layer, the thickness is 30 to 950 ⁇ m, and the acrylic adhesive layer is a polymer of a monomer component (M) containing a (meth) acrylic acid alkyl ester monomer (A)
  • the acrylic pressure-sensitive adhesive layer is formed of an acrylic pressure-sensitive adhesive composition, and the pressure-sensitive adhesive composition comprises an acrylic polymer (X), a tackifying resin (Y), and a crosslinking agent (Z).
  • the weight of the monomer component (M) wherein the acrylic polymer (X) comprises 100 parts by mass of (meth) acrylic acid alkyl ester monomer (A) and 5 to 18 parts by mass of carboxyl group-containing monomer (B) The double-sided pressure-sensitive adhesive tape according to any one of the above [1] to [11], which is a united body.
  • the shape conformity to the adherend is good, the water fastness is excellent, and even if the adherend is a soft polyvinyl chloride resin as a raw material, the adhesion is long. It is possible to provide a double-sided adhesive tape that is maintained for a period of time.
  • an acrylic pressure-sensitive adhesive layer is provided on both surfaces of a foam substrate which is an acrylic resin foam pressure-sensitive adhesive layer, and has the following physical properties.
  • ⁇ Thickness> The total thickness of the double-sided pressure-sensitive adhesive tape of the present invention is 1200 ⁇ m or less. If the total thickness exceeds 1200 ⁇ m, the processability deteriorates and the strength of the adhesive decreases due to the force in the shear direction, and the adhesive fixation of the members constituting the portable electronic device and the adhesive fixation of the vehicle members are caused.
  • the total thickness of the double-sided pressure-sensitive adhesive tape is preferably 150 to 1100 ⁇ m, more preferably 200 to 1000 ⁇ m, and still more preferably 300 to 1000 ⁇ m. Within such a range, the shape conformity to the adherend is good, a gap is hardly generated between the adherend and the double-sided pressure-sensitive adhesive tape, and the water repellency tends to be good.
  • the thickness of the foam substrate of the present invention is 30 to 950 ⁇ m. By setting it as such a range, water fastness becomes favorable and it becomes difficult to produce the time-dependent adhesive strength fall with respect to soft polyvinyl chloride resin. If the thickness of the foam substrate is less than 30 ⁇ m, the shape conformity of the double-sided pressure-sensitive adhesive tape to the adherend is reduced, and the water fastness tends to be deteriorated, and the adhesion with time to the soft polyvinyl chloride resin Deterioration is likely to occur.
  • the thickness of the foam substrate is preferably 50 to 950 ⁇ m, more preferably 100 to 900 ⁇ m.
  • the foam substrate contains the hollow resin fine particles described later, the decrease in adhesion with time to the soft polyvinyl chloride resin of the double-sided pressure-sensitive adhesive tape is particularly hard to occur, and the thickness of the foam substrate is relatively increased. Is preferred.
  • the thickness of the foam substrate is preferably 50 ⁇ m or more, more preferably 100 ⁇ m or more, still more preferably 250 ⁇ m or more, and 950 ⁇ m or less.
  • each acrylic pressure-sensitive adhesive layer of the present invention is not particularly limited, but is preferably 20 to 100 ⁇ m, more preferably 30 to 80 ⁇ m. By setting it as such a range, the adhesiveness with respect to a to-be-adhered body improves. In addition, by making the thickness of the acrylic pressure-sensitive adhesive layer into the above range and adjusting the thickness range of the foam base as described above, water fastness is enhanced, and the adhesion strength with time to the soft polyvinyl chloride resin decreases. Is less likely to occur.
  • the total thickness of the acrylic pressure-sensitive adhesive layer on both surfaces of the foam substrate is preferably adjusted to be equal to or less than the thickness of the foam substrate, and is preferably 1/2 or less of the thickness of the foam substrate, It is preferable that it is 1/3 or less of the thickness of a body base material.
  • the total thickness of the acrylic pressure-sensitive adhesive layers on both sides of the foam substrate is preferably 10 to 170 ⁇ m.
  • the total thickness of the acrylic pressure-sensitive adhesive layer on both sides of the foam substrate is more preferably 20 to 150 ⁇ m, still more preferably 50 to 130 ⁇ m.
  • the tensile elongation of the double-sided pressure-sensitive adhesive tape of the present invention is 100 to 600%. If the tensile elongation is less than 100%, the stress dispersion effect due to the deformation of the pressure-sensitive adhesive itself is not sufficiently expressed, peeling of the pressure-sensitive adhesive is likely to occur at the adherend interface, and a decrease in waterproof performance and adhesion performance is observed. When the tensile elongation exceeds 600%, it is likely to cause problems in cutting the tape into a use shape.
  • the tensile elongation of the double-sided pressure-sensitive adhesive tape is preferably 200 to 575%, more preferably 240 to 550%. The tensile elongation can be measured by the method described in the examples.
  • the 30% compressive stress of the double-sided pressure-sensitive adhesive tape of the present invention is 5 to 200 kPa. When the 30% compressive stress is out of such a range, the shape following property of the double-sided pressure-sensitive adhesive tape to the adherend is poor, and the water fastness is also reduced.
  • the term "30% compressive stress" means a load when 30% of the initial thickness is compressed.
  • the 30% compressive stress of the double-sided pressure-sensitive adhesive tape is preferably 50 to 200 kPa, and more preferably 100 to 200 kPa. The 30% compressive stress can be measured by the method described in the examples.
  • the tensile strength of the double-sided pressure-sensitive adhesive tape of the present invention is not particularly limited, but is preferably 0.5 to 10 MPa, more preferably 0.7 to 7 MPa, from the viewpoint of improving processability and water repellency.
  • the tensile strength can be measured by the method described in the examples.
  • the pressure adhesion of the double-sided pressure-sensitive adhesive tape of the present invention is preferably 25 to 250 N, more preferably 30 to 240 N, and still more preferably 50 to 230 N. Since it becomes easy to prevent the peeling from the adherend by the internal stress of a double-sided adhesive tape as press adhesive power is such a range, waterproofness becomes favorable.
  • the pressure adhesion can be measured by the method described in the examples.
  • the double-sided pressure-sensitive adhesive tape of the present invention has an adhesive strength reduction rate when a soft polyvinyl chloride sheet containing 30% by mass of a plasticizer is used as an adherend ⁇ 100 ⁇ (initial 180 ° peel adhesive strength 180 ° after three months Peel adhesion) / initial 180 ° peel adhesion ⁇ is preferably 50% or less.
  • the adhesive strength is maintained for a long time even if the adherend is made of a soft polyvinyl chloride resin as a raw material.
  • the adhesive strength reduction rate is preferably 40% or less, more preferably 30% or less, and still more preferably 20% or less.
  • the initial 180 ° peel adhesive strength mentioned above is 180 ° at 30 ° C. after the double-sided pressure-sensitive adhesive tape is attached to a soft polyvinyl chloride sheet (containing 30% by mass of diisononyl phthalate (DINP) as a plasticizer). It means the peel strength at the time of peeling to °.
  • the 180 ° peel adhesive strength after 3 months means the peel strength at the time of peeling at 180 ° after 3 months at 23 ° C. after the double-sided pressure-sensitive adhesive tape is attached to the soft polyvinyl chloride sheet.
  • the adhesion reduction rate can be measured by the method described in the examples.
  • the visible light transmittance of the double-sided pressure-sensitive adhesive tape of the present invention is preferably 60% or less, more preferably 40% or less, and still more preferably 35% or less.
  • the visible light transmittance is 60% or less, the ground glass effect is exhibited, it is difficult to optically identify the surface of the adherend, and the concealment performance is improved.
  • the acrylic pressure-sensitive adhesive layer is preferably formed of an acrylic pressure-sensitive adhesive composition.
  • the acrylic pressure-sensitive adhesive composition is a composition containing an acrylic polymer (X), preferably containing an acrylic polymer (X), a tackifier resin (Y) and a crosslinking agent (Z).
  • X acrylic polymer
  • Y tackifier resin
  • Z crosslinking agent
  • the acrylic polymer (X) contained in the acrylic pressure-sensitive adhesive composition is a polymer of a monomer component (M) containing a (meth) acrylic acid alkyl ester monomer (A).
  • (meth) acrylic acid indicates acrylic acid or methacrylic acid
  • (meth) acrylate indicates acrylate or methacrylate.
  • the monomer component (M) preferably contains 60% by mass or more of the (meth) acrylic acid alkyl ester monomer (A), more preferably 70% by mass or more, and 80% by mass or more It is further preferable that
  • the (meth) acrylic acid alkyl ester monomer (A) may be composed of one kind of (meth) acrylic acid alkyl ester monomer, or is composed of (meth) acrylic acid alkyl ester monomers having different carbon numbers of a plurality of alkyl groups. It may be something.
  • the (meth) acrylic acid alkyl ester monomer (A) preferably contains a (meth) acrylic acid alkyl ester monomer (a) having 4 or less carbon atoms of the (meth) acrylic acid alkyl group, and the (meth) acrylic acid alkyl group It is preferable to contain 60 mass% or more of ester monomers (a).
  • the content of the (meth) acrylic acid alkyl ester monomer (a) having 4 or less carbon atoms in the alkyl group is 60% by mass or more, the soft poly of the acrylic pressure-sensitive adhesive layer formed of the acrylic pressure-sensitive adhesive composition
  • the adhesion to an adherend such as a vinyl chloride resin tends to be less likely to decrease.
  • the content of the (meth) acrylic acid alkyl ester monomer (a) having 4 or less carbon atoms in the alkyl group in the (meth) acrylic acid alkyl ester monomer (A) suppresses the decrease in adhesion to the soft polyvinyl chloride resin From the viewpoint, it is preferably 80% by mass or more, more preferably 90% by mass or more, and still more preferably 100% by mass.
  • Examples of the (meth) acrylic acid alkyl ester monomer (a) having 4 or less carbon atoms in the alkyl group include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, n -Butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate.
  • These (meth) acrylic acid alkyl ester monomers can be used alone or in combination of two or more. Further, among the above, it is preferable to use n-butyl (meth) acrylate, and it is more preferable to use n-butyl (meth) acrylate alone.
  • the (meth) acrylic acid alkyl ester monomer (A) may contain a (meth) acrylic acid alkyl ester monomer (b) in which the alkyl group has 5 or more carbon atoms.
  • examples of the (meth) acrylic acid alkyl ester monomer (b) include 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, lauryl (meth) acrylate and the like.
  • the content of the (meth) acrylic acid alkyl ester monomer (b) having 5 or more carbon atoms of the alkyl group in the (meth) acrylic acid alkyl ester monomer (A) is preferably 40% by mass or less, more preferably 20 % Or less, more preferably 10% by mass or less.
  • the monomer component (M) which is a raw material of acrylic polymer (X) contained in an acrylic adhesive composition contains a (meth) acrylic acid alkyl ester monomer (A) and a carboxyl group-containing monomer (B) .
  • the adhesive strength of the acrylic pressure-sensitive adhesive layer formed of the acrylic pressure-sensitive adhesive composition to an adherend such as a soft polyvinyl chloride resin tends to be hardly reduced.
  • the monomer component (M) more preferably contains 5 to 18 parts by mass of the carboxyl group-containing monomer (B) with respect to 100 parts by mass of the (meth) acrylic acid alkyl ester monomer (A).
  • the carboxyl group-containing monomer (B) is 5 parts by mass or more, reactivity with a crosslinking agent described later is increased, and a soft polyvinyl chloride resin of a pressure-sensitive adhesive layer formed from an acrylic pressure-sensitive adhesive composition The adhesion to the adherend is less likely to be reduced.
  • the reason for this is that when the content of the carboxyl group-containing monomer (B) is large, the polarity of the acrylic polymer (X) is increased, and the migration of the plasticizer, which is a relatively low polarity compound, from the soft polyvinyl chloride resin to the adhesive layer It is thought that it is hard to occur.
  • the content of the carboxyl group-containing monomer (B) is 18 parts by mass or less, the pressure-sensitive adhesive layer formed from the acrylic pressure-sensitive adhesive composition itself suppresses the decrease in adhesive strength due to hardening as the crosslinking progresses. Can.
  • the amount of the carboxyl group-containing monomer (B) is preferably 5 to 17 parts by mass, and more preferably 6 to 15 parts by mass with respect to 100 parts by mass of the (meth) acrylic acid alkyl ester monomer (A). More preferably, it is 10 to 15 parts by mass.
  • the carboxyl group-containing monomer (B) is a polymerizable monomer that contains a carboxyl group in the molecule and is preferably a carboxyl group-containing vinyl monomer. Examples of the carboxyl group-containing monomer (B) include (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid and the like, (meth) acrylic acid is preferable, and acrylic acid is more preferable.
  • the carboxyl group-containing monomer (B) may be used alone or in combination of two or more.
  • the monomer component (M) may contain other monomers other than the (meth) acrylic acid alkyl ester monomer (A) and the carboxyl group-containing monomer (B).
  • the other monomers include monomers containing polar groups other than carboxyl groups, and styrene-based monomers such as styrene, ⁇ -methylstyrene, o-methylstyrene, and p-methylstyrene.
  • the weight average molecular weight of the acrylic polymer (X) used for the acrylic pressure-sensitive adhesive composition of the present invention is not particularly limited, but is preferably 550,000 to 1,000,000. When the weight-average molecular weight is 550,000 or more, the adhesive strength to an adherend such as a soft polyvinyl chloride resin tends to be unlikely to decrease with time. On the other hand, when the weight-average molecular weight is 1,000,000 or less, the pressure-sensitive adhesive layer is not too hard, so the adhesion to a complex-shaped adherend is unlikely to be reduced.
  • the weight average molecular weight of the acrylic polymer (X) is preferably 600,000 to 800,000, more preferably 65 to 750,000.
  • limiting in particular in the manufacturing method of acrylic polymer (X) For example, the method of radically polymerizing a monomer component in presence of a polymerization initiator is mentioned.
  • a polymerization method a known method can be adopted, and examples thereof include solution polymerization, emulsion polymerization, suspension polymerization, and bulk polymerization.
  • the polymerization initiator is not particularly limited, and examples thereof include organic peroxide-based polymerization initiators and azo-based polymerization initiators.
  • Organic peroxide-based polymerization initiators include cumene hydroperoxide, benzoyl peroxide, lauroyl peroxide, octanoyl peroxide, stearoyl peroxide, o-chlorobenzoyl peroxide, acetyl peroxide, t-butyl hydroperoxide T-Butyl peroxy acetate, t-butyl peroxy isobutyrate, 3,5,5-trimethylhexanoyl peroxide, t-butyl peroxy-2-ethylhexanoate or di-t-butyl peroxide etc Can be mentioned.
  • the azo polymerization initiator is not particularly limited, and, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis (2,4-dimethylvaleronitrile), 4,4'-azobis (4) -Cyanopentanoic acid), 2,2'-azobis (2-methylbutyronitrile) and the like.
  • 2,2'-azobisisobutyronitrile 2,2'-azobis (2,4-dimethylvaleronitrile
  • 4,4'-azobis (4) -Cyanopentanoic acid 4,4'-azobis (4) -Cyanopentanoic acid
  • 2,2'-azobis (2-methylbutyronitrile) and the like.
  • using lauroyl peroxide, octanoyl peroxide, stearoyl peroxide, 3,5,5-trimethylhexanoyl peroxide from the viewpoint of reducing the odor of the acrylic polymer (X) preferable.
  • a polymerization initiator may be used individually by 1 type, or may use 2 or more types together.
  • the amount of the polymerization initiator is not particularly limited, but is preferably 0.01 to 10 parts by mass, more preferably 0.05 to 2 parts by mass, with respect to 100 parts by mass of the monomer component.
  • the acrylic pressure-sensitive adhesive composition of the present invention preferably contains a tackifying resin (Y).
  • the tackiness of the acrylic pressure-sensitive adhesive layer is improved by containing the tackifying resin.
  • the adherend is a polyolefin resin
  • the adhesive strength tends to be further improved. Therefore, when the tackifying resin (Y) is contained in the acrylic pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape of the present invention, the adhesion to the soft polyvinyl chloride resin and the polyolefin-based resin is good.
  • the softening point of the tackifying resin (Y) is preferably 140 to 160 ° C.
  • the softening point of the tackifying resin (Y) is 140 to 150 ° C. from the viewpoint of enhancing the adhesion of the acrylic pressure-sensitive adhesive layer to the adherend such as a soft polyvinyl chloride resin and suppressing the decrease in the adhesion with time. It is more preferable that The softening point can be measured in accordance with JIS K2207.
  • tackifying resin for example, rosin-based resins such as petroleum resin-based tackifying resin, hydrogenated petroleum resin-based tackifying resin, rosin diol-based tackifying resin, rosin ester-based tackifying resin, terpene resin And phenolic resins, xylene resins, coumarone resins, ketone resins, and modified resins thereof.
  • rosin-based tackifying resins are preferable, and rosin ester-based tackifying resins are more preferable, from the viewpoint of enhancing the adhesion to adherends such as soft polyvinyl chloride resins and suppressing the adhesion with time.
  • the rosin ester-based tackifying resin include disproportionated rosin ester, polymerized rosin ester, hydrogenated rosin ester, rosin phenol-based resin and the like.
  • the compounding amount of the tackifier resin (Y) in the pressure-sensitive adhesive composition is preferably 3 to 9 parts by mass with respect to 100 parts by mass of the acrylic polymer (X). If the blending amount of the tackifying resin is 3 parts by mass or more, the adhesion is increased. When the blending amount of the tackifying resin is 9 parts by mass or less, the migration of the plasticizer from the soft polyvinyl chloride resin to the pressure-sensitive adhesive layer is less likely to occur, and the decrease in adhesion with time is easily suppressed.
  • the compounding amount of the tackifying resin (Y) in the acrylic pressure-sensitive adhesive composition is preferably 3 to 8 parts by mass, more preferably 4 to 7 parts by mass with respect to 100 parts by mass of the acrylic polymer (X). is there.
  • tackifying resin (Y) it is preferable that the component of molecular weight 600 or less is 13 mass% or less. If such a tackifying resin is used, the volatile component generated from the tackifying resin can be suppressed low while maintaining the adhesiveness. Furthermore, the viscosity of the pressure-sensitive adhesive layer can be relatively increased by reducing the amount of low molecular weight components, and in the state where the pressure-sensitive adhesive layer is laminated on a soft polyvinyl chloride resin, a plasticizer from the soft polyvinyl chloride resin to the pressure-sensitive adhesive layer Movement is easily inhibited, and the decrease in adhesion with time is less likely to occur.
  • the molecular weight of the said tackifying resin and its content are measured by gel permeation chromatography (GPC), and can be calculated by a polystyrene conversion value and an area ratio.
  • GPC gel permeation chromatography
  • the method for removing the component having a molecular weight of 600 or less from the tackifying resin include a method of heating and melting the tackifying resin to a temperature higher than the softening point, a method of blowing steam, and the like.
  • the acrylic pressure-sensitive adhesive composition preferably contains a crosslinking agent.
  • a crosslinking agent By using a crosslinking agent, the cohesion of the formed pressure-sensitive adhesive layer is enhanced, and the physical properties as a pressure-sensitive adhesive tape are improved.
  • a crosslinking agent For example, although an isocyanate type crosslinking agent, an epoxy-type crosslinking agent, an aziridine type crosslinking agent, a metal chelate type crosslinking agent etc. are mentioned, Among these, a metal chelate type crosslinking agent and an isocyanate type crosslinking agent At least one selected from the group consisting of agents is preferred.
  • Examples of the isocyanate-based crosslinking agent include tolylene diisocyanate, naphthylene-1,5-diisocyanate, and diphenylmethane diisocyanate.
  • Examples of commercially available products include Coronate L manufactured by Nippon Polyurethane Co., Ltd.
  • Examples of the metal chelate-based crosslinking agent include chelate compounds whose metal atoms are aluminum, zirconium, titanium, zinc, iron, tin and the like, and aluminum chelates in which the central metal is aluminum are preferable.
  • Commercially available products include Aluminum Chelate A and Aluminum Chelate M manufactured by Kawaken Fine Chemical Co., Ltd.
  • the content of the crosslinking agent in the pressure-sensitive adhesive composition is not particularly limited, but is preferably 0.005 to 5 parts by mass, more preferably 0.01 to 1 with respect to 100 parts by mass of the acrylic polymer (X). It is part by mass, more preferably 0.02 to 0.1 parts by mass.
  • the acrylic pressure-sensitive adhesive layer may or may not contain a coloring agent, but may contain a coloring agent according to the presence or absence and degree of coloring of the adherend. .
  • the acrylic pressure-sensitive adhesive layer is preferably colored in black.
  • an adherend made of a rubber material or the like often contains carbon black for reinforcement, and therefore often exhibits black color. Therefore, when the acrylic pressure-sensitive adhesive layer is colored in black, in the case where the adherend is a black member, it is possible to make the bonding site of the both inconspicuous.
  • a black coloring agent an inorganic black pigment and an organic black pigment are mentioned, for example. In view of versatility and cost, carbon black which is an inorganic black pigment is preferable.
  • the blending amount of the colorant in the acrylic pressure-sensitive adhesive composition is not particularly limited, but it may be blended in an amount of 1 to 5 parts by mass with respect to 100 parts by mass of the acrylic polymer (X).
  • the acrylic pressure-sensitive adhesive composition of the present invention includes, in addition to the acrylic polymer (X), the tackifying resin (Y), the crosslinking agent (Z) and the colorant, ethyl acetate, dimethyl sulfoxide, ethanol, acetone, diethyl A solvent such as ether may be included, and among the solvents, ethyl acetate is preferable from the viewpoint of suppressing the volatile component low.
  • the acrylic pressure-sensitive adhesive composition of the present invention may contain additives such as a filler, a dye, and an antioxidant.
  • An acrylic adhesive layer can be formed by apply
  • the gel fraction of the acrylic pressure-sensitive adhesive layer formed from the acrylic pressure-sensitive adhesive composition of the present invention inhibits the migration of the plasticizer from the soft polyvinyl chloride resin to the pressure-sensitive adhesive layer, and the adhesive strength decreases with time. From the viewpoint of suppressing, 30 to 50% by mass is preferable, and 35 to 45% by mass is more preferable.
  • the gel fraction can be measured by the method described in the examples.
  • the foam base of the present invention is an acrylic resin foam pressure-sensitive adhesive layer containing an acrylic polymer (X2), in which cells are dispersed in the acrylic polymer (X2).
  • the amount of the acrylic polymer (X2) in the acrylic resin foam pressure-sensitive adhesive layer is preferably 50% by mass or more, more preferably 70% by mass or more, and still more preferably 90% by mass or more.
  • the expansion ratio of the foam substrate is preferably 1.25 cm 3 / g or more, more preferably 1.3 cm 3 / g or more, and preferably 4 cm 3 / g or less, 3 cm 3 / g
  • the following are more preferable.
  • foaming ratio measures apparent density and calculates
  • the foam substrate is formed by foaming an acrylic polymer (X2) and a foamable composition containing at least a foaming agent.
  • a foam base material has an acrylic adhesive layer on both surfaces, it is preferable that the foam base material itself has good adhesiveness similarly to the acrylic pressure-sensitive adhesive layer. Since both the foam substrate and the acrylic pressure-sensitive adhesive layer have adhesiveness, the entire double-sided pressure-sensitive adhesive tape contributes to the adhesion to the adherend, so the acrylic pressure-sensitive adhesive layer on both surfaces of the foam substrate is temporarily Even if it is relatively thin, the adhesion to the adherend tends to be good.
  • the foam base does not decrease its adhesiveness to the soft polyvinyl chloride resin with time similarly to the acrylic pressure-sensitive adhesive layer.
  • the foamable composition for forming a foam base has a composition composed of the same kind of component as the above acrylic pressure-sensitive adhesive composition except that it contains a foaming agent. Is preferred. Moreover, in this case, the processability at the time of producing the double-sided pressure-sensitive adhesive tape also becomes good.
  • a foaming agent contained in the foamable composition for example, a heat-degradable foaming agent such as azodicarbonamide and a thermally expandable microcapsule can be used, but it is preferable to use a thermally expandable microcapsule.
  • a thermally expandable microcapsule is one in which a volatile expanding agent is contained in an outer shell formed of a polymer, and the outer shell is plasticized by heating and the volatile expanding agent is gasified and expanded to be hollow. Resin fine particles can be formed. The hollow resin fine particles have air bubbles inside the outer shell. That is, the foam substrate of the present invention preferably contains hollow resin fine particles in which the thermally expandable microcapsules are expanded.
  • the foam base containing hollow resin fine particles is higher in rigidity as compared with a foam base that is foamed using another type of foaming agent other than the thermally expandable microcapsules, and thus stress such as water pressure It is possible to suppress initial deformation with respect to If the initial deformation is likely to occur, additional stress is applied to the portion where the deformation has occurred, and as a result, the double-sided pressure-sensitive adhesive tape is likely to break.
  • the reason for the high rigidity of the foam base containing hollow resin fine particles is considered to be that the outer shell after thermal expansion functions as a reinforcing material for air bubbles. Therefore, the double-sided pressure-sensitive adhesive tape having a foam base containing hollow resin fine particles can easily prevent initial deformation due to stress, and water fastness becomes good. Moreover, the cohesion force fall of the foam base material by a plasticizer can be suppressed, and the time-lapse
  • the outer shell of the thermally expandable microcapsule is not particularly limited, but is preferably formed of a nitrile polymer containing a structural unit derived from a nitrile monomer.
  • the nitrile monomer is a monomer containing a nitrile group, and specific examples thereof include (meth) acrylonitrile, ⁇ -chloroacrylonitrile, ⁇ -ethoxyacrylonitrile, fumaronitrile and the like, and among these, (meth) acrylonitrile Is preferred. It becomes possible to make gas barrier property favorable because an outer shell has a structural unit derived from a nitrile system monomer.
  • (meth) acrylo is a term representing one or both of acrylo and methacrylo, and the other synonymous terms are the same.
  • the nitrile polymer is generally a copolymer containing a structural unit derived from another monomer component in addition to the structural unit derived from the nitrile monomer.
  • Other monomer components include (meth) acrylic esters such as methyl (meth) acrylate and ethyl (meth) acrylate, vinyl esters such as vinyl chloride, vinylidene chloride, vinyl pyridine and vinyl acetate, styrene, and halogenated styrenes Polymerization of styrenes such as ⁇ -methylstyrene, unsaturated monocarboxylic acids such as (meth) acrylic acid, ethacrylic acid, crotonic acid and cinnamic acid, and unsaturated dicarboxylic acids such as maleic acid, fumaric acid and itaconic acid Monomers are included.
  • the other monomer component may contain a monomer having two or more radically polymerizable double bonds.
  • the other monomer component include divinylbenzene, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, 1,4-butane Diol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, di (meth) acrylate of polyethylene glycol having a weight average molecular weight of 200 to 600, glycerin Di (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide modified trimethylolpropane tri (meth) acrylate, pentaery Ritorutori (
  • the above-mentioned outer shell is, besides the nitrile polymer, other than the polymerization initiator, the stabilizer, the ultraviolet light absorber, the antioxidant, the antistatic agent, the flame retardant, the silane coupling agent, the coloring agent, and the nitrile polymer Or the like may be contained.
  • the proportion of the nitrile monomer is preferably 40 to 95% by mass, and more preferably 50 to 90% by mass, with respect to the total amount of monomers constituting the polymer contained in the outer shell.
  • the above-mentioned "the total amount of monomers constituting the polymer contained in the outer shell” means the total amount of monomers constituting the nitrile type polymer when the polymer contained in the outer shell comprises only a nitrile polymer.
  • the total amount of monomers constituting the nitrile polymer and the other polymers is meant.
  • Volatile expansion agents are substances which become gaseous at a temperature below the softening point of the polymer constituting the outer shell, hydrocarbons having 3 to 8 carbon atoms, petroleum ethers, halides of methane, chlorofluorocarbons, Examples thereof include low boiling point liquids selected from tetraalkylsilanes and the like, and compounds which generate gas upon heating such as azobisisobutyronitrile.
  • hydrocarbon having 3 to 8 carbon atoms examples include propane, propylene, butene, normal butane, isobutane, isopentane, neopentane, normal pentane, hexane, heptane, octane and the like.
  • examples of the above-mentioned halide of methane include methyl chloride, methylene chloride and the like.
  • Examples of the chlorofluorocarbons include CCl 3 F, CCl 2 F 2 and the like.
  • tetraalkylsilane examples include tetramethylsilane and trimethylethylsilane.
  • hydrocarbons having 3 to 8 carbon atoms are preferable, and saturated hydrocarbons having 3 to 8 carbon atoms such as isopentane, normal pentane, and octane are more preferable.
  • the average particle size of the thermally expandable microcapsules is not particularly limited, but is preferably 1 to 20 ⁇ m, more preferably 1 to 10 ⁇ m.
  • the expansion start temperature of the thermally expandable microcapsule is preferably 70 to 260 ° C., and more preferably 80 to 130 ° C.
  • the maximum foaming temperature of the thermally expandable microcapsule is preferably 100 to 290 ° C., and more preferably 100 to 150 ° C.
  • the compounding amount of the thermally expandable microcapsule is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the acrylic polymer (X2), more preferably 0.5 to 8 parts by mass, 1 More preferably, it is 5 parts by mass. Within such a range, the water repellency of the double-sided pressure-sensitive adhesive tape tends to be good.
  • the thermally expandable microcapsules may further include other inorganic hollow balloons such as a glass balloon, fly ash balloon, silica balloon, shirasu balloon, carbon balloon, alumina balloon, zirconia balloon and the like.
  • Thermally expandable microcapsules having a thermoplastic resin shell composed of one or more copolymers of acrylonitrile, methacrylonitrile, acrylic acid ester and methacrylic acid ester are commercially available, for example, Advancel (registered trademark) manufactured by Sekisui Chemical Co., Ltd., and Expander (registered trademark) manufactured by Nippon Ferrite Co., Ltd., etc. may be mentioned.
  • the acrylic polymer (X2) is not particularly limited as long as it is a polymer of a monomer component containing a (meth) acrylic acid alkyl ester monomer, but the acrylic polymer (X) contained in the above-mentioned acrylic pressure-sensitive adhesive layer The same as the above is preferred.
  • acrylic polymer (X2) what was demonstrated by acrylic polymer (X) mentioned above can be used similarly, and a preferable molecular weight, the kind of monomer component, quantity, etc. are also the same.
  • the foamable composition may contain other polymers other than the acrylic polymer (X2), the other polymers are preferably 30 parts by mass or less with respect to 100 parts by mass of the acrylic polymer (X2), It is more preferable that it is a mass part or less, and it is still more preferable that it is 5 mass parts or less.
  • the foamable composition preferably contains a tackifying resin (Y2) as in the case of the acrylic pressure-sensitive adhesive composition described above.
  • a tackifying resin (Y2) contained in the foamable composition the same tackifying resin (Y) as described above can be used, and the softening point, the kind, the compounding amount, and the like of the preferable tackifying resin are also the same.
  • the foamable composition preferably contains a crosslinking agent (Z2) as in the case of the acrylic pressure-sensitive adhesive composition described above.
  • a crosslinking agent (Z2) contained in the foamable composition the same one as the crosslinking agent (Z) described above can be used, and the kind, the blending amount, and the like of the preferable crosslinking agent are also the same.
  • the foam substrate may be colored in order to develop the design and optical properties of the double-sided pressure-sensitive adhesive tape.
  • the colorants can be used alone or in combination of two or more.
  • the foam base be white-colored.
  • the foam base material of this invention is halogen free from a viewpoint of environmental impact reduction.
  • halogen-free means that the halogen compound is not intentionally blended in the foam substrate, and preferably, the foam substrate does not contain the halogen compound.
  • additives such as an ultraviolet light absorber, a light stabilizer, an antioxidant, and a filler may be blended, if necessary.
  • the foam substrate can be produced by forming a foamable composition by injection molding, extrusion molding, press molding, sheeting by coating, etc. and foaming.
  • foaming may be simultaneous with shaping
  • an acrylic adhesive composition is apply
  • a drying method for example, a method of placing in a drying furnace such as an IR heater or an oven and drying it may be mentioned.
  • the application of the double-sided pressure-sensitive adhesive tape of the present invention is not particularly limited, but members for vehicles such as cars, aircrafts and ships, building members, electronic parts, living members such as carpet backings, household appliances and household appliances It can be used for all applications such as Above all, it is more preferable to use for a vehicle window glass which is a member for vehicles, or an exterior member for vehicles such as an emblem, a dam rubber, a weather strip and the like. Furthermore, it is preferable to use the double-sided pressure-sensitive adhesive tape of the present invention among the above-mentioned members for vehicles having an uneven shape or a curved surface portion.
  • a soft polyvinyl chloride resin means polyvinyl chloride containing a plasticizer, and the content of the plasticizer is usually 5% by mass or more of the whole soft polyvinyl chloride resin, preferably 10 to 80 mass. %, More preferably 10 to 50% by mass.
  • the type of plasticizer contained in the soft polyvinyl chloride is not particularly limited, and those contained in a common soft polyvinyl chloride resin can be used.
  • plasticizers examples include dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), di-2-ethylhexyl phthalate (DOP), di n-octyl phthalate (N-DOP), Phthalate plasticizers such as heptyl phthalate (DHP), diisodecyl phthalate (DIDP), butyl benzyl phthalate (BBP), diisononyl phthalate (DINP), di-2-ethylhexyl adipate (DOA), diisobutyl adipate (DIBA), dibutyl Examples include fatty acid ester plasticizers such as adipate (DBA), diisodecyl adipate (DIDA) and butyl oleate (BO).
  • DMP dimethyl phthalate
  • DEP diethyl phthalate
  • DBP dibutyl phthalate
  • DOP
  • Example 1 Provide of acrylic polymer> Into a reaction vessel, 100 parts by mass of n-butyl acrylate and 11 parts by mass of acrylic acid were introduced to obtain a monomer component. The monomer component is dissolved in ethyl acetate, and 0.1 part by mass of lauroyl peroxide is added as a polymerization initiator at a reflux point, and the mixture is refluxed at 70 ° C. for 5 hours to give an acrylic polymer having a weight average molecular weight of 720,000. Solution was obtained.
  • the detail of the component used for manufacture of the said acrylic adhesive composition and a foam base is as follows.
  • Polymerized rosin ester-based tackifying resin P The content of components with a softening point of “140 ° C.” and a molecular weight of 600 or less is 13% by mass Metal chelate cross-linking agent Q ... Aluminum chelate, "M-A5DT” manufactured by Soken Chemical Co., Ltd. Thermal expansion microcapsules R: "Expancell DU120” manufactured by Nippon Ferrite Co., Ltd. ⁇ Manufacture of double-sided adhesive tape>
  • the above acrylic pressure-sensitive adhesive composition is applied to both sides of a foam substrate, dried at 120 ° C. for 5 minutes, and double-sided adhesion in which 50 ⁇ m thick acrylic pressure-sensitive adhesive layers are respectively laminated on both sides of the foam substrate. I got a tape. Each evaluation result is shown in Table 1.
  • Examples 2 to 3 Comparative Examples 1 and 2
  • a double-sided pressure-sensitive adhesive tape was produced in the same manner as in Example 1 except that the thicknesses of the foam base and the acrylic pressure-sensitive adhesive layer were changed. Each evaluation result is shown in Table 1.
  • Adhesion strength reduction rate (%) 100 ⁇ (initial adhesive strength-temporal adhesive strength) / initial adhesive strength
  • initial adhesive strength means initial 180 ° peel adhesive strength
  • temporal adhesive strength is 3 months. The latter means 180 ° peel adhesion.
  • Initial adhesion (initial 180 ° peel adhesion) A PET film with a thickness of 23 ⁇ m was attached to one side of the double-sided pressure-sensitive adhesive tape of each Example and Comparative Example so that air did not enter.
  • the pressure-sensitive adhesive layer side of the double-sided pressure-sensitive adhesive tape attached to the PET film which is not attached to the PET film is soft polyvinyl chloride having a thickness of 300 ⁇ m under an environment of room temperature (23 ° C.) and relative humidity 50%.
  • the sheet (containing 30% by mass of DINP as a plasticizer) was attached at a speed of 30 mm / minute using a 2 kg pressure-bonded rubber roller. After leaving for 30 minutes in this environment, the 180 ° peel strength at 25 mm width was measured at a speed of 3 mm / min according to the method of JIS Z0237, and this was taken as the initial adhesive strength (N / 25 mm).
  • Adhesive strength over time 180 ° peel adhesive strength after 3 months
  • a PET film with a thickness of 23 ⁇ m was attached to one side of the double-sided pressure-sensitive adhesive tape of each Example and Comparative Example so that air did not enter.
  • the pressure-sensitive adhesive layer side of the double-sided pressure-sensitive adhesive tape attached to the PET film which is not attached to the PET film is soft polyvinyl chloride having a thickness of 300 ⁇ m under an environment of room temperature (23 ° C.) and relative humidity 50%.
  • the sheet (containing 30% by mass of DINP as a plasticizer) was attached at a speed of 30 mm / minute using a 2 kg pressure-bonded rubber roller.
  • ⁇ Tensile elongation> The elongation of the double-sided pressure-sensitive adhesive tape was measured at 23 ° C. according to the method of JIS Z0237, using a Tishiron universal material tester “RTF-1350” manufactured by A & D Co., and a tensile elongation at 25 mm width.
  • ⁇ Tensile strength> The tensile strength of the double-sided pressure-sensitive adhesive tape was measured at 23 ° C. according to the method of JIS Z0237 using a “RTF-1350” universal material testing machine manufactured by A & D Co., Ltd. and a tensile strength at 25 mm width. .
  • the method of measuring the pressure adhesion of the double-sided pressure-sensitive adhesive tape will be described with reference to FIGS.
  • the double-sided pressure-sensitive adhesive tape was punched into a frame shape of 1 mm wide, 40 mm wide, and 60 mm long as shown in FIG.
  • a test piece 11 was attached to a polycarbonate plate 13 (70 mm wide, 80 mm long, 2 mm thick) having a through hole with a diameter of 15 mm at the central portion so that the through hole was positioned at the central portion.
  • acrylic board 12 (width 40mm, length 60mm, thickness 1mm) is stuck on the surface side opposite to the surface where polycarbonate board 13 of test piece 11 exists, it is made to be crimped by making 1 reciprocation with 2kg roller, and evaluation Samples were made.
  • the sample for evaluation is set in the A & D company Tensiron universal material testing machine "RTF-1350", and the acrylic plate 12 is pressed with a round bar 14 under the condition of 10 mm / min, and the acrylic plate 12 and the polycarbonate plate The maximum stress until 13 separated was measured as the pressure adhesion.
  • CM-3700 d manufactured by Konica Minolta
  • the double-sided pressure-sensitive adhesive tapes according to the present invention of Examples 1 to 3 are found to be excellent in the shape conformity to the rough surface, and the adhesion is hardly reduced even when the adherend is made of soft polyvinyl chloride. The In addition, it was found that water fastness was also good. On the other hand, in the double-sided pressure-sensitive adhesive tape of Comparative Example 1, the shape following property to the rough surface is poor, and in the double-sided pressure-sensitive adhesive tape of Comparative Examples 1 and 2, the adhesive strength when soft polyvinyl chloride is used as the adherend decreases. It was easy and water fastness was not good.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un ruban adhésif double face qui est équipé d'un matériau de base en mousse, et d'une couche d'adhésif acrylique agencée sur les deux surfaces dudit matériau de base. Ledit matériau de base en mousse consiste en une couche adhésive en mousse de résine acrylique comprenant un polymère acrylique (X2), et présente une épaisseur de 30 à 950μｍ. Ladite couche d'adhésif acrylique comprend un polymère acrylique (X) qui consiste en un polymère d'un composant monomère (M) contenant un monomère d'ester alkylique d'acide (méth)acrylique (A), et présente une épaisseur totale inférieure ou égale à 1200μｍ, un allongement à la traction compris entre 100 et 600%, et une contrainte de compression à 30% comprise entre 5 et 200kPa. Selon l'invention, il est possible de fournir un ruban adhésif double face dans lequel la force d'adhésion est maintenue à un niveau élevé, et la résistance à l'eau est satisfaisante, y compris lorsque le support d'adhésion a une résine de polychlorure de vinyle souple pour matière de départ, dans le cas où la surface du support d'adhésion présente des irrégularités.
PCT/JP2018/046646 2017-12-19 2018-12-18 Ruban adhésif double face Ceased WO2019124405A1 (fr)

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CN114127213A (zh) * 2019-08-30 2022-03-01 Dic株式会社 粘合带

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CN114127213B (zh) * 2019-08-30 2024-05-28 Dic株式会社 粘合带
CN113831854A (zh) * 2020-06-23 2021-12-24 Dic株式会社 粘着带以及物品及电子设备

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