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WO2025142437A1 - Composition adhésive, couche adhésive, film décoratif et corps moulé décoratif - Google Patents

Composition adhésive, couche adhésive, film décoratif et corps moulé décoratif Download PDF

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Publication number
WO2025142437A1
WO2025142437A1 PCT/JP2024/043471 JP2024043471W WO2025142437A1 WO 2025142437 A1 WO2025142437 A1 WO 2025142437A1 JP 2024043471 W JP2024043471 W JP 2024043471W WO 2025142437 A1 WO2025142437 A1 WO 2025142437A1
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WO
WIPO (PCT)
Prior art keywords
mass
acid
adhesive composition
parts
modified polyolefin
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.)
Pending
Application number
PCT/JP2024/043471
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English (en)
Japanese (ja)
Inventor
翔喜 藤
陽司 山下
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Toyobo MC Corp
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Toyobo MC Corp
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Filing date
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Publication of WO2025142437A1 publication Critical patent/WO2025142437A1/fr
Pending legal-status Critical Current
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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
    • 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
    • C09J11/08—Macromolecular additives
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
    • 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
    • C09J7/35—Heat-activated

Definitions

  • the present invention relates to an adhesive composition, an adhesive layer, a decorative film, and a decorated molded body.
  • polyolefins such as polypropylene and polyethylene have been used in fields such as automobile parts as base materials for sheets, films, molded bodies, etc., due to their low cost and excellent properties such as moldability, chemical resistance, water resistance, and electrical properties.
  • Polyolefin substrates are often painted on the surface for design and protection purposes. When painting, an adhesive is usually used to improve adhesion between the topcoat and the polyolefin substrate.
  • an adhesive is usually used to improve adhesion between the topcoat and the polyolefin substrate.
  • polyolefin substrates are non-polar and crystalline, making it difficult to paint, bond, etc.
  • polyolefin adhesives based on polyolefin resins which have the same main chain structure and therefore good adhesion, have been used as adhesives.
  • polyolefin-based materials are increasingly being used in automobile exteriors such as bumpers, automobile exterior panels, fenders, and radiator grilles.
  • parts such as gasoline tanks, door handles, engine covers, and side mirrors use substrates other than polyolefin-based materials, such as polycarbonate, ABS resin, polyvinyl chloride, acrylic resin, urethane resin, and metal.
  • the replacement of conventional spray painting with film decoration has been considered.
  • the method of obtaining a decorated molded body by laminating a decorative film on the outermost surface of a molded body has the advantage of being able to decorate the surface of a molded body having three-dimensional unevenness, and therefore has the advantage of having a higher degree of freedom in design and superior productivity than conventional spray painting.
  • a film decoration method called vacuum pressure molding in which an adhesive material is used to attach the film to a three-dimensional part, has attracted attention.
  • Patent Document 1 describes "a decorative film having a decorative layer and an adhesive layer, the adhesive layer containing a block copolymer including a block composed of an isopentane-derived structure, a terpene resin, and a color pigment, and is for decorative molding under vacuum heating conditions or reduced pressure heating conditions.” Furthermore, Patent Document 1 describes that "The method for manufacturing the decorative film preferably includes a step of forming an adhesive layer by applying an adhesive composition onto the decorative layer and drying or curing the composition.”
  • the present invention has been made in consideration of the above, and aims to provide an adhesive composition that has good storage stability, good adhesive strength when unstretched, and can maintain good adhesive strength even after stretching.
  • the inventors conducted extensive research to achieve the above objective, and discovered that an adhesive composition containing an acid-modified polyolefin (A), a thermoplastic elastomer (B), and a tackifier resin (C) in a specific ratio can achieve the above objective. Based on this knowledge, the inventors conducted further research and completed the present invention.
  • A acid-modified polyolefin
  • B thermoplastic elastomer
  • C tackifier resin
  • An adhesive composition comprising an acid-modified polyolefin (A), a thermoplastic elastomer (B), and a tackifier resin (C), and satisfying all of the following (1) to (4): (1)
  • the melting point of the acid-modified polyolefin (A) is 50 to 120°C.
  • the content of the tackifier resin (C) is 100 to 600 parts by mass based on 100 parts by mass of the acid-modified polyolefin (A).
  • the content of the thermoplastic elastomer (B) is 100 to 600 parts by mass based on 100 parts by mass of the acid-modified polyolefin (A).
  • the thermoplastic elastomer (B) contains a styrene-based elastomer.
  • a and/or B means “one of A and B” or “both A and B,” and specifically means “A,” “B,” or “A and B.”
  • room temperature means a temperature within the range of 20°C to 25°C.
  • the acid-modified polyolefin (A) is a graft polymer having a structure in which an ⁇ , ⁇ -unsaturated carboxylic acid or its acid anhydride is grafted to a propylene- ⁇ -olefin copolymer.
  • melt viscosity of the acid-modified polyolefin (A) at 230°C is 1000 mPa ⁇ s or more and 10000 mPa ⁇ s or less, the storage stability of the adhesive composition tends to be even better, the adhesive properties of the adhesive composition tend to be better, and the adhesive strength after stretching tends to be better.
  • the content of the acid-modified polyolefin (A) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B) and the tackifier resin (C) is preferably 5% by mass or more and 30% by mass or less, more preferably 8% by mass or more and 25% by mass or less, even more preferably 9% by mass or more and 20% by mass or less, and even more preferably 9.5% by mass or more and 17.5% by mass or less.
  • the adhesive composition of the present invention contains a thermoplastic elastomer (B) as an essential component.
  • the thermoplastic elastomer (B) contains a styrene-based elastomer.
  • the internal stress in the adhesive composition can be reduced, and the adhesion between the adhesive composition and the substrate film can be improved.
  • thermoplastic elastomer (B) contains a styrene-based elastomer
  • the compatibility between the acid-modified polyolefin (A) and the thermoplastic elastomer (B) becomes good, and the adhesive composition has good storage stability.
  • styrene-based elastomers examples include styrene homopolymers, styrene-butadiene block copolymers, styrene-butadiene-styrene block copolymers, styrene-ethylene-propylene block copolymers, styrene-isoprene-butadiene-styrene block copolymers, and styrene-isoprene-styrene block copolymers.
  • the styrene-based elastomers may be hydrogenated.
  • the styrene-based elastomer is preferably at least one selected from the group consisting of styrene homopolymer, styrene-butadiene block copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene-propylene block copolymer, styrene-isoprene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and styrene-ethylene-propylene-styrene block copolymer.
  • the styrene-based elastomer is preferably at least one selected from the group consisting of styrene-butadiene-styrene block copolymer, styrene-ethylene-propylene-styrene block copolymer, and styrene-isoprene-butadiene-styrene block copolymer.
  • the styrene-based elastomer is preferably a styrene-butadiene-styrene block copolymer and/or a styrene-ethylene-propylene-styrene block copolymer.
  • the content ratio of the olefin-based elastomer relative to the total mass of the adhesive composition is preferably 10 mass% or less, more preferably 8 mass% or less, even more preferably 5 mass% or less, even more preferably 2.5 mass% or less, and particularly preferably 1 mass% or less.
  • olefin-based elastomers examples include ethylene-propylene copolymers, ethylene-butene copolymers, ethylene-vinyl acetate copolymers, and ethylene-ethyl acrylate copolymers.
  • the content of the ethylene-butene copolymer relative to the total mass of the adhesive composition is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 5% by mass or less, even more preferably 2.5% by mass or less, and particularly preferably 1% by mass or less.
  • the content of thermoplastic elastomer (B) is 100 to 600 parts by mass per 100 parts by mass of acid-modified polyolefin (A). If the content of thermoplastic elastomer (B) is less than 100 parts by mass per 100 parts by mass of acid-modified polyolefin (A), the adhesive strength of the adhesive composition when unstretched and after stretching is poor. If the content of thermoplastic elastomer (B) is more than 600 parts by mass per 100 parts by mass of acid-modified polyolefin (A), the storage stability of the adhesive composition is significantly reduced, and the adhesive strength of the adhesive composition when unstretched and after stretching is poor.
  • the content of the thermoplastic elastomer (B) is preferably more than 100 parts by mass and less than 600 parts by mass, more preferably 150 parts by mass or more and 550 parts by mass or less, even more preferably 200 parts by mass or more and 500 parts by mass or less, still more preferably 250 parts by mass or more and 450 parts by mass or less, and most preferably 300 parts by mass or more and 430 parts by mass or less, relative to 100 parts by mass of the acid-modified polyolefin (A).
  • the styrene content in the thermoplastic elastomer (B) is preferably 5% by mass or more and 35% by mass or less, more preferably 7% by mass or more and 30% by mass or less, even more preferably 9% by mass or more and 25% by mass or less, and most preferably 11% by mass or more and 15% by mass or less.
  • the styrene content in the thermoplastic elastomer (B) is 5% by mass or more and 35% by mass or less, the compatibility between the thermoplastic elastomer (B) and the acid-modified polyolefin (A) becomes better, the stress in the thermoplastic elastomer (B) is further relaxed, and the adhesive strength of the adhesive composition after stretching becomes better.
  • the adhesive composition has better adhesion under a wide range of temperature conditions from low to high temperatures, and the adhesion between the polyolefin substrate and a substrate of a type different from the polyolefin substrate becomes even better.
  • the styrene content in the thermoplastic elastomer (B) can be measured using 1H-NMR or 13C-NMR.
  • styrene content refers to the content (mass%) of aromatic vinyl polymer blocks, typically styrene, based on the mass of the thermoplastic elastomer (B).
  • the density of the thermoplastic elastomer (B) is preferably 0.88 to 0.99 g/cm 3 , more preferably 0.89 to 0.91 g/cm 3.
  • the density of the thermoplastic elastomer (B) is 0.88 to 0.99 g/cm 3 , the difference in specific gravity between the thermoplastic elastomer (B) and the acid-modified polyolefin (A) does not become too large, and the storage stability of the adhesive composition tends to be better.
  • the content of the thermoplastic elastomer (B) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B) and the tackifier resin (C) is preferably 20% by mass or more and 70% by mass or less, more preferably 25% by mass or more and 60% by mass or less, even more preferably 30% by mass or more and 50% by mass or less, and even more preferably 38% by mass or more and 48% by mass or less.
  • the adhesive composition of the present invention contains a tackifier resin (C) as an essential component.
  • the adhesive composition can maintain the adhesion of the surface after the adhesive composition is formed into a film, and the adhesion between the substrate film and the adhesive layer can be further improved.
  • the content of the tackifier resin (C) is 100 to 600 parts by mass per 100 parts by mass of the acid-modified polyolefin (A). If the content of the tackifier resin (C) is less than 100 parts by mass per 100 parts by mass of the acid-modified polyolefin (A), the storage stability of the adhesive composition is significantly reduced. If the content of the tackifier resin (C) is more than 600 parts by mass per 100 parts by mass of the acid-modified polyolefin (A), the storage stability of the adhesive composition is significantly reduced, and the adhesive strength of the adhesive composition both before and after stretching is significantly reduced.
  • the content of the tackifier resin (C) is preferably 150 parts by mass or more and 580 parts by mass or less, more preferably 200 parts by mass or more and 550 parts by mass or less, particularly preferably 250 parts by mass or more and 540 parts by mass or less, and most preferably 300 parts by mass or more and 530 parts by mass or less, per 100 parts by mass of the acid-modified polyolefin (A).
  • the softening point of the tackifier resin (C) is preferably 60°C or higher, more preferably 65°C or higher, even more preferably 70°C or higher, and most preferably 75°C or higher.
  • the softening point of the tackifier resin (C) is preferably 150°C or lower, more preferably 145°C or lower, even more preferably 140°C or lower, and most preferably 130°C or lower.
  • the softening point of the tackifier resin (C) is 60°C or higher, the tackifier resin (C) is less likely to bleed out onto the surface at room temperature, resulting in a smooth surface, and the adhesive composition has better adhesion to polyolefin substrates and substrates of a type different from the polyolefin substrate.
  • the softening point of the tackifier resin (C) is 150°C or lower, the adhesive composition has better adhesion under a wide range of temperature conditions from low to high, and the adhesive strength of the adhesive composition after stretching is better.
  • the softening point of the tackifier resin (C) is preferably 60°C or higher and 150°C or lower, more preferably 65°C or higher and 145°C or lower, even more preferably 70°C or higher and 140°C or lower, and most preferably 75°C or higher and 130°C or lower.
  • the tackifier resin (C) is preferably at least one resin selected from the group consisting of rosin-based resins, terpene-based resins, and petroleum resins.
  • rosin-based resins examples include unmodified rosins such as gum rosin, tall oil rosin, and wood rosin; disproportionated rosin; polymerized rosin; hydrogenated rosin; maleic acid-modified rosin; and rosin esters. These rosin-based resins can be used alone or in combination of two or more.
  • Terpene resins include, for example, terpene resins such as ⁇ -pinene polymers, ⁇ -pinene polymers, and limonene polymers; aromatic modified terpene resins; and terpene phenol resins. These terpene resins can be used alone or in combination of two or more kinds.
  • Examples of petroleum resins include aliphatic petroleum resins, alicyclic petroleum resins, aromatic petroleum resins, etc., and these petroleum resins can be used alone or in combination of two or more types.
  • the tackifier resin (C) is preferably a rosin-based resin or a terpene-based resin, more preferably a terpene-based resin.
  • the adhesive composition has better adhesion under a wide range of temperature conditions from low to high, the adhesive strength of the adhesive composition after stretching is better, and further the adhesion between the polyolefin substrate and a substrate of a type different from the polyolefin substrate is even better.
  • the tackifier resin (C) is preferably at least one selected from the group consisting of unmodified rosin, disproportionated rosin, polymerized rosin, hydrogenated rosin, maleic acid modified rosin, rosin ester, terpene resin, aromatic modified terpene resin, and terpene phenol resin.
  • the tackifier resin (C) is preferably a rosin ester and/or an aromatic modified terpene resin, and most preferably an aromatic modified terpene resin.
  • the content of the tackifier resin (C) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) is preferably 20% by mass or more and 70% by mass or less, more preferably 25% by mass or more and 60% by mass or less, even more preferably 30% by mass or more and 55% by mass or less, even more preferably 35% by mass or more and 50% by mass or less, and particularly preferably 38% by mass or more and 48% by mass or less.
  • the adhesive composition of the present embodiment may contain an organic solvent (D).
  • the organic solvent (D) include those capable of dissolving or dispersing the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C).
  • the coatability is further improved.
  • organic solvents (D) include aromatic hydrocarbon solvents such as benzene, toluene, and xylene; aliphatic hydrocarbon solvents such as hexane, heptane, octane, and decane; alicyclic hydrocarbon solvents such as cyclohexane, cyclohexene, methylcyclohexane, and ethylcyclohexane; halogenated hydrocarbon solvents such as trichloroethylene, dichloroethylene, chlorobenzene, and chloroform; alcohol solvents such as methanol, ethanol, isopropyl alcohol, butanol, pentanol, hexanol, propanediol, and phenol; acetone, methyl isobutyl ketone, methyl ethyl ketone, pentanone, hexanone, cyclohexanone, isophorone, and acetophenone.
  • ketone-based solvents such as methyl cellosolve and ethyl cellosolve
  • cellosolve-based solvents such as methyl acetate, ethyl acetate, butyl acetate, methyl propionate, and butyl formate
  • glycol ether-based solvents such as ethylene glycol mono-n-butyl ether, ethylene glycol mono-iso-butyl ether, ethylene glycol mono-tert-butyl ether, diethylene glycol mono-n-butyl ether, diethylene glycol mono-iso-butyl ether, triethylene glycol mono-n-butyl ether, and tetraethylene glycol mono-n-butyl ether.
  • These can be used alone or in combination of two or more.
  • the organic solvent (D) is preferably consisting of a solvent (D1) and a solvent (D2)
  • the solvent (D1) is at least one solvent selected from the group consisting of aromatic hydrocarbon solvents, aliphatic hydrocarbon solvents, alicyclic hydrocarbon solvents, and halogenated hydrocarbon solvents
  • the solvent (D2) is at least one solvent selected from the group consisting of alcohol-based solvents, ketone-based solvents, ester-based solvents, and glycol ether-based solvents.
  • the organic solvent (D) is more preferably: consisting of a solvent (D1) and a solvent (D2), the solvent (D1) is an alicyclic hydrocarbon solvent, The solvent (D2) is a ketone-based solvent and/or an ester-based solvent.
  • the organic solvent (D) is more preferably: consisting of a solvent (D1) and a solvent (D2), the solvent (D1) is an alicyclic hydrocarbon solvent, The solvent (D2) is an ester solvent.
  • the content of the organic solvent (D) is preferably 100 parts by mass or more and 5000 parts by mass or less, more preferably 200 parts by mass or more and 4500 parts by mass or less, even more preferably 250 parts by mass or more and 4000 parts by mass or less, even more preferably 300 parts by mass or more and 3500 parts by mass or less, and most preferably 400 parts by mass or more and 3000 parts by mass or less, relative to 100 parts by mass of the acid-modified polyolefin (A).
  • the storage stability of the adhesive composition is further improved, which is advantageous in terms of economy (production costs and transportation costs).
  • the adhesive composition of this embodiment may contain an antioxidant to further improve adhesion between the polyolefin substrate and a substrate of a type different from the polyolefin substrate, and to further improve the storage stability of the adhesive composition.
  • the antioxidant is preferably a phenolic antioxidant and/or a phosphorus-based antioxidant.
  • SONGNOX 1076 manufactured by SONGWON
  • SONGNOX 1010 manufactured by SONGWON
  • SONGNOX 1098 manufactured by SONGWON
  • SONGNOX 2450 manufactured by SONGWON
  • phosphorus-based antioxidants can be used.
  • examples of commercially available products include SONGNOX 1680 (manufactured by SONGWON).
  • the adhesive composition of this embodiment exhibits sufficient adhesion under a wide range of temperature conditions, from low to high.
  • the adhesive composition of this embodiment has good adhesive strength when unstretched, and can maintain good adhesive strength even after stretching. Furthermore, the adhesive composition of this embodiment exhibits good adhesion to polyolefin substrates and substrates of different types from the polyolefin substrate.
  • the adhesive strength when unstretched is preferably 10 N/25 mm or more, more preferably 15 N/25 mm or more, and even more preferably 20 N/25 mm or more.
  • the adhesive strength after stretching the adhesive composition 1.25 times vertically and 1.25 times horizontally is preferably 5 N/25 mm or more, more preferably 10 N/25 mm or more, and even more preferably 15 N/25 mm or more.
  • the adhesive strength after stretching the adhesive composition 2.0 times vertically and 2.0 times horizontally is preferably 3 N/25 mm or more, more preferably 5 N/25 mm or more, and even more preferably 10 N/25 mm or more.
  • the upper limit of the adhesive strength after stretching is not particularly limited, but 150 N/25 mm is sufficient for industrial purposes.
  • the adhesive strength can be measured in accordance with the peel test method of ASTM-D1876-61. The specific measurement method will be explained in the examples described later.
  • the combined content of the acid-modified polyolefin (A), the thermoplastic elastomer (B) and the tackifier resin (C) relative to the total mass of the adhesive composition is preferably such that the lower limit is 5 mass% or more, 10 mass% or more, 15 mass% or more, and 20 mass% or more, in that order, and the upper limit is preferably 55 mass% or less, 50 mass% or less, 45 mass% or less, and 40 mass% or less, in that order, and these upper and lower limit values can be combined in any desired manner.
  • the adhesive composition may consist only of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) (however, the inclusion of unavoidable impurities is permitted).
  • the combined content of the acid-modified polyolefin (A), the thermoplastic elastomer (B), the tackifier resin (C), and the organic solvent (D) relative to the total mass of the adhesive composition is preferably 80% by mass or more, 85% by mass or more, 90% by mass or more, and 95% by mass or more, in that order.
  • the adhesive composition may consist only of the acid-modified polyolefin (A), the thermoplastic elastomer (B), the tackifier resin (C), and the organic solvent (D) (however, the inclusion of unavoidable impurities is permitted).
  • the adhesive composition of this embodiment has good adhesion between polyolefin substrates and substrates of different types from the polyolefin substrate, and therefore can be suitably used for a wide range of applications, such as sheets, films, and molded articles, in a variety of fields, including automobiles, home appliances, electronic materials, food, and medicine.
  • the adhesive composition of this embodiment can be particularly suitably used as an adhesive composition for decorative films.
  • polystyrene resin A wide variety of known polyolefins commonly used in this field can be used as the polyolefin substrate. Examples of such polyolefins include polyethylene, polypropylene (PP), ethylene-propylene copolymers, propylene-1-butene copolymers, and ethylene-propylene-1-butene copolymers.
  • the adhesive composition of this embodiment is particularly suitable for use with polypropylene substrates.
  • Substrates other than polyolefin substrates that can be used include ABS resin, polycarbonate, polyvinyl chloride, acrylic resin, urethane resin, polyester resin, metal, etc.
  • Step (1) An acid-modified polyolefin (A) having a melting point of 50 to 120°C, a thermoplastic elastomer (B) containing a styrene-based elastomer, and a tackifier resin (C) are charged into a stirrer in any order and kneaded under heating so that the content of the tackifier resin (C) is 100 to 600 parts by mass per 100 parts by mass of the acid-modified polyolefin (A) and the content of the thermoplastic elastomer (B) is 100 to 600 parts by mass per 100 parts by mass of the acid-modified polyolefin (A).
  • Step (2) Thereafter, the mixture is cooled to room temperature to produce an adhesive composition.
  • the organic solvent (D), antioxidant, or additive may be added to the mixer in any order, as necessary.
  • the heating temperature during kneading is usually 50 to 200°C, preferably 60 to 150°C, and more preferably 70 to 120°C.
  • the kneading time varies depending on the heating temperature, etc., but is usually 10 to 120 minutes, preferably 15 to 90 minutes, and more preferably 20 to 60 minutes.
  • the decorative film of the present embodiment has the adhesive layer of the present embodiment and a decorative layer.
  • the decorative film of the present embodiment usually has an adhesive layer formed from the adhesive composition of the present embodiment and a decorative layer.
  • the adhesive composition of the present embodiment can be suitably used when producing a decorative film.
  • the decorative film of the present embodiment preferably has (1A) Having an adhesive layer formed from the adhesive composition of the present embodiment and a decorative layer, in that order; or (2A) Having a decorative layer and an adhesive layer formed from the adhesive composition of the present embodiment, in that order.
  • the base material of the decorative layer may be, for example, ABS resin, polycarbonate, polyvinyl chloride, acrylic resin, urethane resin, polyester resin, etc.
  • the thickness of the decorative layer is preferably 0.01 to 10 mm, more preferably 0.05 to 5 mm, and even more preferably 0.1 to 1 mm.
  • the base material of the decorative layer is usually a layer that determines the design of the decorative film.
  • the adhesive layer of this embodiment contains the adhesive composition of this embodiment.
  • the adhesive layer of this embodiment is usually formed from the adhesive composition of this embodiment.
  • the film thickness of the adhesive layer after drying is preferably 0.5 ⁇ m to 50 ⁇ m, more preferably 1 ⁇ m to 40 ⁇ m, and even more preferably 10 ⁇ m to 30 ⁇ m.
  • the thickness of the adhesive layer after drying is preferably 5 ⁇ m to 80 ⁇ m, and more preferably 10 ⁇ m to 50 ⁇ m.
  • the decorative film exhibits better adhesion under a wide range of temperature conditions from low to high, and has even better adhesive strength after stretching.
  • the decorative film preferably has (1B) A separator layer, an adhesive layer formed from the adhesive composition of the present embodiment, and a decorative layer, in that order, or (2B) A decorative layer, an adhesive layer formed from the adhesive composition of the present embodiment, and a separator layer, in that order.
  • the separator layer is usually used to temporarily protect the adhesive layer.
  • a base film made of synthetic resin, or a base film made of synthetic resin that has been treated for release can be used as the separator layer.
  • polyolefin resins such as polyethylene and polypropylene
  • polyester resins such as polyethylene terephthalate (PET).
  • the separator layer is usually removed from the decorative film by peeling it off during the manufacturing process or during use.
  • the decorated molded body of this embodiment has an adherend and the decorative film of this embodiment.
  • the decorated molded body of this embodiment is usually formed by bonding the decorative film of this embodiment to the adherend.
  • the decorated molded body of this embodiment is usually formed from the adhesive composition of this embodiment.
  • the decorated molded body of this embodiment has a property of having high adhesive strength when not stretched and having sufficient adhesive strength even after stretching.
  • the decorative film of the present embodiment can be produced by a method widely known in the art.
  • the decorative film can be produced by applying the adhesive composition of the present embodiment to the surface of the decorative layer using an applicator, a bar coater, or the like, and then heating and drying the composition to form an adhesive layer on the decorative layer.
  • Adherends include, for example, base films and molded articles.
  • base films include polyolefin resins such as polyethylene and polypropylene, and polyester resins such as polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • molded articles include various home appliances such as household appliances, kitchen appliances, health appliances, and seasonal appliances; interior and exterior components of housing facilities such as toilets, bathrooms, doors, and walls; automobile interior and exterior parts such as bumpers, dashboards, doors, roofs, and bonnets; various miscellaneous items such as household goods and daily miscellaneous goods; electronic parts; nursing care and medical supplies; and interior and exterior parts of ships and aircraft.
  • the vacuum pressure molding method is a method of forming a decorative molded body by adsorbing a decorative film onto the molded body while applying pressure under vacuum conditions, and can be carried out, for example, using a vacuum pressure molding device.
  • An example of the vacuum pressure molding method is as follows.
  • the adherend and the decorative film of this embodiment are set in a molding chamber under atmospheric pressure, and then the molding chamber is evacuated.
  • a heater is used to heat the chamber to the desired temperature, softening the decorative film of this embodiment and then stretching it.
  • the stretched decorative film is brought into contact with a molded product as the adherend, the vacuum in the molding chamber is released to create an atmospheric pressure state, and compressed air is introduced from a compressed air tank into the molding chamber to press the stretched decorative film onto the molded product along the shape of the molded product. The compressed air is then released, and the decorated molded product of this embodiment is removed.
  • the decorative film has a separator layer, it is preferable to set the adherend and the decorative film having the separator layer in the molding chamber under atmospheric pressure, and then peel off the separator layer.
  • An adhesive composition comprising an acid-modified polyolefin (A), a thermoplastic elastomer (B), and a tackifier resin (C), and satisfying all of the following (1) to (4): (1)
  • the melting point of the acid-modified polyolefin (A) is 50 to 120°C.
  • the content of the tackifier resin (C) is 100 to 600 parts by mass based on 100 parts by mass of the acid-modified polyolefin (A).
  • the content of the thermoplastic elastomer (B) is 100 to 600 parts by mass based on 100 parts by mass of the acid-modified polyolefin (A).
  • thermoplastic elastomer (B) contains a styrene-based elastomer.
  • Item 2. Item 2. The adhesive composition according to item 1, wherein the acid-modified polyolefin (A) has an acid value of 2 to 50 mg KOH/g. Item 3. Item 3. The adhesive composition according to item 1 or 2, wherein the acid-modified polyolefin (A) has a melt viscosity at 230° C. of 1,000 to 10,000 mPa ⁇ s. Item 4. Item 4. The adhesive composition according to any one of items 1 to 3, wherein the tackifier resin (C) is a rosin-based resin or a terpene-based resin. Item 5.
  • the melting point (Tm) of the acid-modified polyolefin (A) is Preferably, the temperature is 55° C. or higher and 110° C. or lower, more preferably, 60° C. or higher and 100° C. or lower, even more preferably, 65° C. or higher and 90° C. or lower, and particularly preferably, 70° C. or higher and 85° C. or lower.
  • Tm melting point
  • the acid value of the acid-modified polyolefin (A) is Preferably, it is 2 to 50 mgKOH/g, more preferably, it is 3 to 40 mgKOH/g, even more preferably, it is 4 to 30 mgKOH/g, even more preferably, it is 5 to 25 mgKOH/g, and particularly preferably, it is 6 to 16 mgKOH/g, Item 6.
  • the adhesive composition according to any one of items 1 to 5, Section 7.
  • the melt viscosity of the acid-modified polyolefin (A) at 230°C is Preferably, the viscosity is from 1,000 mPa ⁇ s to 10,000 mPa ⁇ s, more preferably from 1,200 mPa ⁇ s to 8,500 mPa ⁇ s, even more preferably from 1,300 mPa ⁇ s to 7,500 mPa ⁇ s, particularly preferably from 1,400 mPa ⁇ s to 6,000 mPa ⁇ s, and most preferably from 1,500 mPa ⁇ s to 5,000 mPa ⁇ s, Item 7.
  • the adhesive composition according to any one of items 1 to 6, Section 8. Item 8.
  • the acid-modified polyolefin (A) is a graft polymer having a structure in which at least one selected from an ⁇ , ⁇ -unsaturated carboxylic acid and an acid anhydride thereof is grafted to a polyolefin.
  • the acid-modified polyolefin (A) is Preferably, a graft polymer having a structure in which an acid anhydride of an ⁇ , ⁇ -unsaturated carboxylic acid is grafted onto a homopolypropylene or a propylene/ ⁇ -olefin copolymer; More preferably, it is a graft polymer having a structure in which an acid anhydride of an ⁇ , ⁇ -unsaturated carboxylic acid is grafted onto a propylene/ ⁇ -olefin copolymer.
  • Item 9 The adhesive composition according to any one of items 1 to 8, Item 10.
  • the content of the propylene component in the propylene- ⁇ -olefin copolymer is Preferably, it is 50 mol% or more, more preferably 60 mol% or more, even more preferably 65 mol% or more, and particularly preferably 70 mol% or more.
  • the propylene- ⁇ -olefin copolymer is Preferably, propylene/ethylene copolymer and/or propylene/1-butene copolymer, More preferably, it is a propylene/1-butene copolymer.
  • the adhesive composition according to item 9 or 10 Item 12.
  • the acid-modified polyolefin (A) is Preferably, at least one selected from the group consisting of maleic anhydride modified polypropylene, maleic anhydride modified propylene/ethylene copolymer, and maleic anhydride modified propylene/1-butene copolymer, More preferably, maleic anhydride-modified propylene/ethylene copolymer and/or maleic anhydride-modified propylene/1-butene copolymer. More preferably, maleic anhydride modified propylene/1-butene copolymer.
  • the adhesive composition according to any one of items 1 to 11, Item 13.
  • the content of the thermoplastic elastomer (B) is Relative to 100 parts by mass of the acid-modified polyolefin (A), preferably more than 100 parts by mass and less than 600 parts by mass, more preferably 150 parts by mass or more and 550 parts by mass or less, even more preferably 200 parts by mass or more and 500 parts by mass or less, still more preferably 250 parts by mass or more and 450 parts by mass or less, and most preferably 300 parts by mass or more and 430 parts by mass or less, Item 13.
  • the adhesive composition according to any one of items 1 to 12, Section 14.
  • the styrene content in the thermoplastic elastomer (B) is The adhesive composition according to any one of items 1 to 13, wherein the content is preferably 5% by mass or more and 35% by mass or less, more preferably 7% by mass or more and 30% by mass or less, even more preferably 9% by mass or more and 25% by mass or less, and most preferably 11% by mass or more and 15% by mass or less.
  • Item 15 is The adhesive composition according to any one of items 1 to 13, wherein the content is preferably 5% by mass or more and 35% by mass or less, more preferably 7% by mass or more and 30% by mass or less, even more preferably 9% by mass or more and 25% by mass or less, and most preferably 11% by mass or more and 15% by mass or less.
  • the styrene-based elastomer is Preferably, at least one selected from the group consisting of styrene homopolymers, styrene-butadiene block copolymers, styrene-butadiene-styrene block copolymers, styrene-ethylene-propylene block copolymers, styrene-isoprene-butadiene-styrene block copolymers, styrene-isoprene-styrene block copolymers, styrene-ethylene-butylene-styrene block copolymers, and styrene-ethylene-propylene-styrene block copolymers; More preferably, at least one selected from the group consisting of styrene-butadiene-styrene block copolymers, styrene-ethylene-propylene-styren
  • the content of the tackifier resin (C) is Preferably, the amount of the acid-modified polyolefin (A) is 150 parts by mass or more and 580 parts by mass or less, more preferably 200 parts by mass or more and 550 parts by mass or less, particularly preferably 250 parts by mass or more and 540 parts by mass or less, and most preferably 300 parts by mass or more and 530 parts by mass or less, relative to 100 parts by mass of the acid-modified polyolefin (A), Item 16.
  • the tackifier resin (C) Preferably, the resin is a rosin-based resin or a terpene-based resin, more preferably a terpene-based resin. Item 17.
  • the adhesive composition according to any one of items 1 to 16, Section 18.
  • the tackifier resin (C) Preferably, at least one selected from the group consisting of unmodified rosin, disproportionated rosin, polymerized rosin, hydrogenated rosin, maleic acid modified rosin, rosin ester, terpene resin, aromatic modified terpene resin, and terpene phenol resin, Particularly preferred are rosin esters and/or aromatic modified terpene resins. Most preferably, aromatic modified terpene resins, Item 17.
  • the content ratio of the olefin-based elastomer to the total mass of the adhesive composition is Preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 5% by mass or less, even more preferably 2.5% by mass or less, particularly preferably 1% by mass or less, Item 19.
  • the adhesive composition according to item 19, wherein the olefin-based elastomer is an ethylene-propylene copolymer, an ethylene-butene copolymer, an ethylene-vinyl acetate copolymer, or an ethylene-ethyl acrylate copolymer.
  • the content ratio of the acid-modified polyolefin (A) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) is Preferably, the content is 5% by mass or more and 30% by mass or less, more preferably, 8% by mass or more and 25% by mass or less, even more preferably, 9% by mass or more and 20% by mass or less, and even more preferably, 9.5% by mass or more and 17.5% by mass or less, Item 21.
  • the adhesive composition according to any one of items 1 to 20, Section 22.
  • the content ratio of the thermoplastic elastomer (B) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) is Preferably, the content is 20% by mass or more and 70% by mass or less, more preferably, 25% by mass or more and 60% by mass or less, even more preferably, 30% by mass or more and 50% by mass or less, and even more preferably, 38% by mass or more and 48% by mass or less, Item 22.
  • the adhesive composition according to any one of items 1 to 21, Section 23.
  • the content ratio of the tackifier resin (C) relative to the total mass of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) is Preferably, the content is 20% by mass or more and 70% by mass or less, more preferably, 25% by mass or more and 60% by mass or less, even more preferably, 30% by mass or more and 55% by mass or less, even more preferably, 35% by mass or more and 50% by mass or less, and particularly preferably, 38% by mass or more and 48% by mass or less, Item 23.
  • the adhesive composition according to any one of items 1 to 22, Section 24.
  • the total content ratio of the acid-modified polyolefin (A), the thermoplastic elastomer (B), and the tackifier resin (C) relative to the total mass of the adhesive composition is Preferably, the content is 5% by mass or more and 55% by mass or less, more preferably, 10% by mass or more and 50% by mass or less, even more preferably, 15% by mass or more and 45% by mass or less, and even more preferably, 20% by mass or more and 40% by mass or less, Item 24.
  • the content of the organic solvent (D) relative to 100 parts by mass of the acid-modified polyolefin (A) is Preferably, the amount is 100 parts by mass or more and 5000 parts by mass or less, more preferably, 200 parts by mass or more and 4500 parts by mass or less, even more preferably, 250 parts by mass or more and 4000 parts by mass or less, even more preferably, 300 parts by mass or more and 3500 parts by mass or less, and most preferably, 400 parts by mass or more and 3000 parts by mass or less, Item 26.
  • the organic solvent (D) is preferably consisting of a solvent (D1) and a solvent (D2), the solvent (D1) is at least one solvent selected from the group consisting of aromatic hydrocarbon solvents, aliphatic hydrocarbon solvents, alicyclic hydrocarbon solvents, and halogenated hydrocarbon solvents, The solvent (D2) is at least one solvent selected from the group consisting of alcohol-based solvents, ketone-based solvents, ester-based solvents, and glycol ether-based solvents.
  • Item 27 The adhesive composition according to item 25 or 26. Section 28.
  • the organic solvent (D) is more preferably consisting of a solvent (D1) and a solvent (D2),
  • the solvent (D1) is an alicyclic hydrocarbon solvent
  • the solvent (D2) is a ketone-based solvent and/or an ester-based solvent.
  • Item 28 The adhesive composition according to any one of items 25 to 27.
  • Section 29. The organic solvent (D) is more preferably consisting of a solvent (D1) and a solvent (D2), The solvent (D1) is an alicyclic hydrocarbon solvent, The solvent (D2) is an ester-based solvent.
  • Item 30 The adhesive composition according to any one of items 27 to 29, wherein Section 31.
  • the total content ratio of the acid-modified polyolefin (A), the thermoplastic elastomer (B), the tackifier resin (C), and the organic solvent (D) relative to the total mass of the adhesive composition is Preferably 80% by mass or more, more preferably 85% by mass or more, even more preferably 90% by mass or more, and even more preferably 95% by mass or more, Item 31.
  • the adhesive composition according to item 32, wherein the antioxidant is a phenol-based antioxidant and/or a phosphorus-based antioxidant.
  • the adhesive composition according to any one of items 1 to 33 which is for use in a decorative film.
  • Section 35. Item 35. An adhesive layer comprising the adhesive composition according to any one of items 1 to 34.
  • Section 36. Item 36.
  • a decorative film having the adhesive layer according to item 35 and a decorative layer.
  • Section 37. Item 37. A decorated molded body comprising the decorative film according to item 36 and an adherend.
  • room temperature means a temperature within the range of 20°C to 25°C.
  • the acid value (mg KOH/g) of the acid-modified polyolefin (A) means the amount of potassium hydroxide (KOH) required to neutralize 1 g of the acid-modified polyolefin (A).
  • KOH potassium hydroxide
  • the oxidation of the acid-modified polyolefin (A) was measured according to the test method of JIS K0070 (1992).
  • the calibration curve was obtained by dissolving each of the standard polystyrenes manufactured by GL Sciences, namely "Molecular weight standard (fat-soluble polymer) MW 500: Model 2012-2", “Molecular weight standard (fat-soluble polymer) MW 2,000: Model 2012-5", “Molecular weight standard (fat-soluble polymer) MW 10,000: Model 2012-9”, “Molecular weight standard (fat-soluble polymer) MW 20,000: Model 2013-1”, “Molecular weight standard (fat-soluble polymer) MW 50,000: Model 2013-3”, and “Molecular weight standard (fat-soluble polymer) MW 200,000: Model 2013-7”, at a concentration of 0.5% to prepare a tetrahydrofuran solution, filtering the solution, and then placing the solution in a vial for measurement.
  • melt viscosity (mPa ⁇ s) was measured 25 minutes, 30 minutes, 35 minutes, and 40 minutes later, and the average value was taken as the melt viscosity (mPa ⁇ s) of the acid-modified polyolefin (A) at 230°C.
  • the reaction liquid was cooled to 128 ° C., and then poured into a container containing 250 parts by mass of methyl ethyl ketone, and stirred for 10 minutes while keeping warm in a hot water bath at 40 ° C. to precipitate the resin, and then cooled in a cold water bath until the internal temperature of the slurry liquid from which the resin had precipitated was 25 ° C.
  • the mixture was centrifuged and separated into solid and liquid to obtain a wet resin.
  • the obtained wet resin was further washed several times with methyl ethyl ketone to remove unreacted maleic anhydride.
  • the obtained resin was dried under reduced pressure at 40° C.
  • A-1 maleic anhydride-modified propylene/1-butene copolymer
  • A-1 maleic anhydride-modified propylene/1-butene copolymer
  • Mw weight average molecular weight
  • Tm melt viscosity at 230° C.: 1500 mPa ⁇ s
  • A an acid-modified polyolefin
  • the reaction liquid was cooled to 128 ° C., and then placed in a container containing 250 parts by mass of methyl ethyl ketone, and stirred for 10 minutes while keeping warm in a hot water bath at 40 ° C. to precipitate a resin, and then cooled in a cold water bath until the internal temperature of the slurry liquid from which the resin had precipitated was 25 ° C. After cooling, the mixture was centrifuged and separated into solid and liquid to obtain a wet resin.
  • the obtained wet resin was dried under reduced pressure at 40°C for 6 hours to obtain a maleic anhydride-modified propylene/1-butene copolymer (A-2) (propylene component content: 75 mol%, 1-butene component content: 25 mol%, acid value: 13 mgKOH/g, weight average molecular weight (Mw): 60,000, Tm: 80°C, melt viscosity at 230°C: 3000 mPa ⁇ s), which is an acid-modified polyolefin (A).
  • A acid-modified polyolefin
  • a maleic anhydride-modified propylene-ethylene-1-butene copolymer (A-4) (propylene component content: 94 mol%, ethylene component content: 3 mol%, 1-butene component content: 3 mol%, acid value: 19 mgKOH/g, weight average molecular weight (Mw): 70,000, Tm: 130°C, melt viscosity at 230°C: 3000 mPa ⁇ s), which is an acid-modified polyolefin (A), was obtained in the same manner as in Production Example 1, except that the propylene-1-butene copolymer used in Production Example 1 was changed to a propylene-ethylene-1-butene copolymer (Tm: 130°C, weight average molecular weight (Mw): 70,000, propylene component content: 94 mol%, ethylene component content: 3 mol%, 1-butene component content: 3 mol%).
  • a maleic anhydride-modified propylene-ethylene copolymer (A-5) (propylene component content: 85 mol%, ethylene component content: 15 mol%, acid value: 22 mgKOH/g, weight average molecular weight (Mw): 90,000, Tm: 63°C, melt viscosity at 230°C: 8000 mPa ⁇ s), which is an acid-modified polyolefin (A), was obtained in the same manner as in Production Example 1, except that the propylene-1-butene copolymer used in Production Example 1 was changed to a propylene-ethylene copolymer (Tm: 63°C, weight average molecular weight (Mw): 135,000, propylene component content: 85 mol%, ethylene component content: 15 mol%).
  • a maleic anhydride-modified propylene-ethylene copolymer (A-6) (propylene component content: 95 mol%, ethylene component content: 5 mol%, acid value: 22 mgKOH/g, weight average molecular weight (Mw): 60,000, Tm: 115°C, melt viscosity at 230°C: 3300 mPa ⁇ s), which is an acid-modified polyolefin (A), was obtained in the same manner as in Production Example 1, except that the propylene-1-butene copolymer used in Production Example 1 was changed to a propylene-ethylene copolymer (Tm: 122°C, weight average molecular weight (Mw): 135,000, propylene component content: 95 mol%, ethylene component content: 5 mol%).
  • A-6 maleic anhydride-modified propylene-ethylene copolymer (A-6) (propylene component content: 95 mol%, ethylene component content: 5 mol%, acid value: 22 mgKOH
  • thermoplastic elastomer (B) used in the examples and comparative examples is as follows.
  • Thermoplastic elastomer (B-1) Septon (registered trademark) 2063 manufactured by Kuraray Co., Ltd. (styrene-ethylene-propylene-styrene elastomer, styrene content 13% by mass)
  • Thermoplastic elastomer (B-2) Septon (registered trademark) 2006 manufactured by Kuraray Co., Ltd.
  • Thermoplastic elastomer (B-3) Asahi Kasei Corporation, Tufprene (registered trademark) A (styrene-butadiene-styrene elastomer, styrene content 40% by mass)
  • the tackifier resin (C) used in the examples and comparative examples is as follows.
  • Tackifier resin (C-1) YS Resin (registered trademark) TO-85 (aromatic modified terpene resin, softening point 85°C) manufactured by Yasuhara Chemical Co., Ltd.
  • Tackifier resin (C-2) Pine Crystal (registered trademark) KE-100 (rosin ester resin, softening point 100°C) manufactured by Arakawa Chemical Industries, Ltd.
  • antioxidants used in the examples and comparative examples are as follows: Antioxidant 1: SONGWON, SONGNOX 1010 (phenolic antioxidant) Antioxidant 2: SONGNOX 1680 (phosphorus-based antioxidant) manufactured by SONGWON
  • a polypropylene (PP) test plate (manufactured by Nippon Test Panel Co., Ltd., thickness 2 mm) was superimposed as an adherend on the adhesive layer of the obtained decorative film (surface of the adhesive layer on the opposite side to the urethane resin film side), and the plate was bonded at a temperature of 100°C and 0.2 MPa for 30 seconds using a heat seal tester manufactured by Tester Sangyo Co., Ltd. (manufactured by Tester Sangyo Co., Ltd., TP-701-B). After bonding, the plate was cured at room temperature for 1 day to produce a decorative molded body (PP test plate/decorative film). The prepared decorated molded article (unstretched decorated molded article) was used as a sample for measuring adhesive strength when unstretched.
  • the obtained decorative film (adhesive layer/urethane resin film) was placed in a metal mold for stretching, and a polypropylene (PP) test plate (manufactured by Nippon Test Panel Co., Ltd., thickness 2 mm) was used as the adherend.
  • the metal mold and PP test plate were each set in a TOM molding machine "NGF-T-0203" (manufactured by Fuse Vacuum Co., Ltd.).
  • a urethane resin film (Hygress (registered trademark) DUS-202, manufactured by Seedam, thickness 100 mm) was used as the substrate for the decorative layer.
  • the adhesive compositions 1 to 14 and 16 to 27 manufactured were applied onto the urethane resin film using an applicator so that the film thickness after drying was 40 ⁇ m, and dried for 15 minutes in an 80°C atmosphere using a hot air dryer to obtain a decorative film (adhesive layer/urethane resin film) in which an adhesive layer (film thickness 40 ⁇ m) was formed on the urethane resin film.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention concerne une composition adhésive présentant une bonne stabilité au stockage, une bonne force adhésive lorsqu'elle n'est pas étirée, et permettant de maintenir une bonne force adhésive même après avoir été étirée. Plus particulièrement, la présente invention concerne une composition adhésive qui contient une polyoléfine modifiée par un acide (A), un élastomère thermoplastique (B) et une résine donnant du collant (C), et qui satisfait aux relations (1) à (4). (1) Le point de fusion de la polyoléfine modifiée par un acide (A) est situé dans la plage allant de 50 à 120 °C. (2) La teneur en résine donnant du collant (C) est située dans la plage allant de 100 à 600 parties en masse pour 100 parties en masse de la polyoléfine modifiée par un acide (A). (3) La teneur en élastomère thermoplastique (B) est située dans la plage allant de 100 à 600 parties en masse pour 100 parties en masse de la polyoléfine modifiée par un acide (A). (4) L'élastomère thermoplastique (B) contient un élastomère à base de styrène.
PCT/JP2024/043471 2023-12-27 2024-12-09 Composition adhésive, couche adhésive, film décoratif et corps moulé décoratif Pending WO2025142437A1 (fr)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10265751A (ja) * 1997-03-26 1998-10-06 Mitsubishi Chem Corp 接着用樹脂組成物、積層体及び多層延伸成形体
JPH10265756A (ja) * 1997-03-26 1998-10-06 Mitsubishi Chem Corp 接着用樹脂組成物及び積層体
EP2119751A1 (fr) * 2008-05-15 2009-11-18 Sunstar Giken Kabushiki Kaisha Composition de revêtement préliminaire adhésif à un paquet
WO2011129080A1 (fr) * 2010-04-16 2011-10-20 株式会社カネカ Composition de résine adhésive et produits moulés
JP2012233066A (ja) * 2011-04-28 2012-11-29 Kaneka Corp 接着性樹脂組成物および成型体
WO2013105392A1 (fr) * 2012-01-11 2013-07-18 株式会社クラレ Composition de polymère thermoplastique et article moulé
JP2018069680A (ja) * 2016-11-02 2018-05-10 三菱ケミカル株式会社 積層体
WO2020075577A1 (fr) * 2018-10-10 2020-04-16 東洋紡株式会社 Composition polyoléfinique adhésive

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10265751A (ja) * 1997-03-26 1998-10-06 Mitsubishi Chem Corp 接着用樹脂組成物、積層体及び多層延伸成形体
JPH10265756A (ja) * 1997-03-26 1998-10-06 Mitsubishi Chem Corp 接着用樹脂組成物及び積層体
EP2119751A1 (fr) * 2008-05-15 2009-11-18 Sunstar Giken Kabushiki Kaisha Composition de revêtement préliminaire adhésif à un paquet
WO2011129080A1 (fr) * 2010-04-16 2011-10-20 株式会社カネカ Composition de résine adhésive et produits moulés
JP2012233066A (ja) * 2011-04-28 2012-11-29 Kaneka Corp 接着性樹脂組成物および成型体
WO2013105392A1 (fr) * 2012-01-11 2013-07-18 株式会社クラレ Composition de polymère thermoplastique et article moulé
JP2018069680A (ja) * 2016-11-02 2018-05-10 三菱ケミカル株式会社 積層体
WO2020075577A1 (fr) * 2018-10-10 2020-04-16 東洋紡株式会社 Composition polyoléfinique adhésive

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