WO2019069610A1 - Composition adhésive - Google Patents

Composition adhésive Download PDF

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Publication number
WO2019069610A1
WO2019069610A1 PCT/JP2018/032673 JP2018032673W WO2019069610A1 WO 2019069610 A1 WO2019069610 A1 WO 2019069610A1 JP 2018032673 W JP2018032673 W JP 2018032673W WO 2019069610 A1 WO2019069610 A1 WO 2019069610A1
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WO
WIPO (PCT)
Prior art keywords
adhesive composition
sensitive adhesive
pressure
elastic modulus
frequency
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Application number
PCT/JP2018/032673
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English (en)
Japanese (ja)
Inventor
麻希 佐見津
智 宮丸
松本　隆
Original Assignee
株式会社Moresco
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Application filed by 株式会社Moresco filed Critical 株式会社Moresco
Priority to CN201880062772.4A priority Critical patent/CN111148812A/zh
Priority to JP2019546582A priority patent/JP6891288B2/ja
Publication of WO2019069610A1 publication Critical patent/WO2019069610A1/fr

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    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds

Definitions

  • the present invention relates to a pressure-sensitive adhesive composition.
  • the pressure-sensitive adhesive composition is applied to an adherend which is an adhesion target in a molten state by heating, and the adherends are kept in contact with each other through the melted pressure-sensitive adhesive composition. As a result, adherends are adhered to each other.
  • an adhesive composition is used, for example, in the field of packaging such as cardboard and small boxes, the field of sanitary materials such as disposable diapers and sanitary products, the field of bookbinding, the field of plywood, woodworking, automobile, home electronics, housing etc. It is used in various fields.
  • the pressure-sensitive adhesive composition is used in a molten state by heating as described above, the solvent is not particularly required.
  • the pressure-sensitive adhesive composition is preferably used, for example, in the field of hygiene materials as an adhesive having high safety to the human body.
  • sanitary materials such as sanitary napkins and breast milk pads are used by bonding them to underwear with a pressure-sensitive adhesive composition.
  • the urine absorbing pad is used by adhering to a disposable diaper as a base material with an adhesive composition.
  • the adhesion of the sanitary material is such that an adhesive layer is formed on a predetermined place of the sanitary material, and the adhesive layer is pressed against an object such as underwear when the sanitary material is used to adhere the sanitary material.
  • An adhesive is usually used to form the adhesive layer, but a pressure-sensitive adhesive composition containing a thermoplastic polymer as a main component (base polymer) is generally used, taking into consideration the productivity at the production stage of the sanitary material.
  • the pressure-sensitive adhesive composition applied to the above-mentioned application needs to be securely adhered without being deviated from the object such as the undergarment at the time of using the sanitary material, so that the peel strength with the object such as the undergarment is high It needs to have the characteristics.
  • the pressure-sensitive adhesive composition after using a hygienic material, it is necessary for the pressure-sensitive adhesive composition to exhibit properties such that it is likely to be peeled off from an object such as underwear and does not remain on the object such as underwear.
  • the peel strength of the pressure-sensitive adhesive composition is too high, it is expected that the adhesive composition is reliably adhered without deviation from an object such as underwear when using the sanitary material, but then the pressure-sensitive adhesive composition is peeled off from the sanitary material And the like (hereinafter, this may be referred to as “adhesive residue”).
  • the peel strength of the pressure-sensitive adhesive composition is too low, it is expected that the adhesive residue will be reduced after use of the sanitary material, in which case the sanitary material may be removed from objects such as underwear when using the sanitary material. There is a possibility of shifting or peeling off easily.
  • the occurrence of adhesive residue on objects such as underwear may cause discomfort for the user, which may impair the commercial value as a hygienic material, and adhesion such that adhesive residue does not occur with higher accuracy. It is desirable to realize an agent composition.
  • Patent Document 1 contains a hydrogenated thermoplastic block copolymer which is a copolymer of a vinyl aromatic hydrocarbon and a conjugated diene compound, a tackifying resin, and a plasticizer at a predetermined blending ratio.
  • a hot melt adhesive is proposed in which the toluene viscosity (30 ° C., 10 wt% toluene solution) of the hydrogenated thermoplastic block copolymer is 100 to 2600 mPa ⁇ s.
  • Patent Document 3 is a hot melt adhesive having a thermoplastic block copolymer which is a copolymer of a vinyl aromatic hydrocarbon and a conjugated diene compound and an ⁇ -methylstyrene resin, which is obtained at 50 ° C.
  • a hot melt adhesive having a storage modulus G ′ at an angular velocity of 10 rad / s of 8.0 ⁇ 10 3 Pa to 5.0 ⁇ 10 4 Pa has been proposed.
  • the hydrogenated thermoplastic block copolymer is contained as a basic component, and in the pressure-sensitive adhesive composition containing this component, the peel strength with an object such as underwear can be sufficiently enhanced.
  • the adsorptive member is easily displaced from the object such as the underwear when using the sanitary material. In order to prevent the displacement of the adsorptive member from the underwear or the like, it is necessary to coat more adhesive composition on the sanitary material.
  • the adsorptive member is an underwear or the like as in the case of using a hydrogenated thermoplastic block copolymer by containing a linear styrene-butadiene-styrene block copolymer as a basic component. It is possible to avoid the problem of being easily deviated from the object of However, in this technique, the peel strength of the sanitary material tends to be too high due to the influence of other components. As a result, there is a problem that adhesive residue tends to occur when the sanitary material is peeled off after use.
  • the storage elastic modulus G ′ does not necessarily satisfy both the characteristics (a) and (b), and both the characteristics (a) and (b) It is desirable that the characteristics be satisfied more reliably.
  • ⁇ MeSt resin an ⁇ -methylstyrene resin
  • a hot melt adhesive containing such a substance is used.
  • the sanitary material used is uncomfortable for the user of the sanitary material.
  • the present invention has been made in view of such circumstances, and the purpose thereof is to ensure that the user of the sanitary material is not uncomfortable and does not deviate from the object such as the underwear when using the sanitary material.
  • a pressure-sensitive adhesive composition capable of satisfying both properties of being easily peeled off from an object such as underwear after adhering and using a hygienic material, and not allowing the pressure-sensitive adhesive composition to remain on the object such as underwear. It is in.
  • the pressure-sensitive adhesive composition according to one aspect of the present invention is a pressure-sensitive adhesive composition containing a thermoplastic polymer as a base polymer, which does not contain an ⁇ -methylstyrene resin, and the temperature: 40 ° C., frequency:
  • the storage elastic modulus G ′ at 0.1 Hz satisfies at least one of 20000 Pa or more, the temperature: 40 ° C., and the frequency: 0.1 Hz loss elastic modulus G ′ ′ at 4300 Pa or more, and the temperature: 40 ° C.
  • the storage elastic modulus G ′ at a frequency of 1 Hz is 32000 Pa or less, and the temperature: 40 ° C., and the loss elastic modulus G ′ ′ at a frequency of 1 Hz is at least 11000 Pa.
  • this strength may be referred to as “initial adhesion”) from an object such as underwear when using a sanitary material .
  • the adhesive composition In order to enhance this initial adhesion, it is necessary to increase the wettability to the object, that is, the adhesive composition must be flexible. In order to prevent the occurrence of adhesive residue, it is necessary that the pressure-sensitive adhesive composition does not "glue-stretch", ie, has a cohesion force higher than the adhesive force of the adhesive, when peeling the sanitary material is there.
  • the pressure-sensitive adhesive composition proposed so far contains a thermoplastic polymer, a tackifying resin and a softener (or a plasticizer) as basic components, and the above-mentioned (a), by appropriately adjusting the content thereof. It has been studied from the viewpoint of satisfying both characteristics (b).
  • the present inventors paid attention to storage elastic modulus G 'and loss elastic modulus G "which are known as indices for evaluating the dynamic elastic modulus of a substance, and examined the influence of these on the above-mentioned characteristics.
  • the storage elastic modulus G ′ is an index of the force to restore the deformation of the substance
  • the loss elastic modulus G ′ ′ is the index of the force to suppress the deformation of the substance
  • the storage elastic modulus G ′ and the loss elastic modulus G ′ ′ have different values depending on the measurement temperature and the measurement frequency, and the measurement conditions (temperature, frequency, It searched about. As a result, it is revealed that, in the region where the measurement frequency is low, a clear correlation is recognized between the storage elastic modulus G ′ and the loss elastic modulus G ′ ′ and the above “cohesion” and “flexibility”. did.
  • the upper limits [in the case of (i) and (ii)] and the lower limits [in the case of (iii) and (iv)] of the storage elastic modulus G ′ and the loss elastic modulus G ′ ′ are not limited at all. Generally, it is as follows.
  • the pressure-sensitive adhesive composition of the present embodiment is a composition that satisfies the requirements for the storage elastic modulus G ′ and the loss elastic modulus G ′ ′, with respect to the component composition, except that it does not include the ⁇ MeSt resin, Although it does not specifically limit, it can manufacture by combining appropriately combining with a thermoplastic polymer normally used as a raw material of an adhesive composition, tackifying resin, and a softener as a basic component. It is as follows when a raw material component is illustrated.
  • thermoplastic polymer is a base polymer that determines the physical properties of the pressure sensitive adhesive composition.
  • thermoplastic polymers examples include styrene-butadiene block copolymers, styrene-isoprene block copolymers, and the like. These thermoplastic polymers are copolymers comprising a first block of a conjugated diene compound and a second block of a vinyl aromatic hydrocarbon, but may contain a triblock.
  • examples of the triblock body include styrene-butadiene-styrene block copolymer (SBS) and the like.
  • SBS styrene-butadiene-styrene block copolymer
  • SIS styrene-isoprene-styrene block copolymer
  • thermoplastic polymer it is preferable to use an unhydrogenated thermoplastic polymer as described above. Thereby, there is an advantage that cost can be further reduced.
  • thermoplastic polymer of the present embodiment a hydrogenated styrene-ethylene-butylene-styrene block copolymer (SEBS), a styrene-ethylene-propylene-styrene block copolymer (SEPS), etc.
  • SEBS hydrogenated styrene-ethylene-butylene-styrene block copolymer
  • SEPS styrene-ethylene-propylene-styrene block copolymer
  • the thermoplastic polymer to which hydrogen is added can also be used, as long as the storage elastic modulus G ′ and the loss elastic modulus G ′ ′ are adjusted in appropriate ranges in the thermoplastic polymers of the above.
  • the thermoplastic polymer may include thermoplastic polymers (other thermoplastic polymers) other than the copolymer.
  • the other thermoplastic polymer is not particularly limited as long as it is a thermoplastic polymer used as a component constituting the pressure-sensitive adhesive composition.
  • examples of the thermoplastic polymer include thermoplastic polymers used as a base polymer which is a main component of the pressure-sensitive adhesive composition.
  • Specific examples of the thermoplastic polymer include thermoplastic polymers of elastomer type, olefin type, ethylene vinyl acetate copolymer (EVA) type, polyester type, polyamide type, and polyacrylic type.
  • the olefin-based thermoplastic polymer is not particularly limited as long as it is used as an olefin-based thermoplastic polymer in a pressure-sensitive adhesive composition. Further, as the olefin-based thermoplastic polymer, for example, a Ziegler-Natta catalyst or a polyolefin-based compound which is solid at room temperature and polymerized with a single site catalyst can be mentioned. Specific examples of the olefin-based thermoplastic polymer include polyethylene, polypropylene, poly-1-butene, polyisobutylene, and random copolymers or blocks in any ratio of propylene and at least one of ethylene and 1-butene.
  • Copolymer ethylene-propylene-diene terpolymer at any ratio of ethylene, propylene and diene component, random copolymer or block copolymer of ethylene or propylene and vinyl compound, random polypropylene, block polypropylene , Homopolypropylene, ethylene / propylene copolymer, ethylene / 1-butene copolymer, ethylene / 1-hexene copolymer, ethylene / 1-octene copolymer, propylene / ethylene copolymer, propylene / ethylene / ⁇ -Butene copolymer, 1-butene homopolymer, 1-butene / ethylene copolymer, 1-butene / propylene copolymer, propylene / 1-butene copolymer, ethylene / vinyl acetate copolymer, ethylene / methacrylic acid copolymer, ethylene -Examples include methyl meth
  • an olefin-based polymer obtained by polymerizing an olefin (alkene) such as ⁇ -olefin as a monomer is preferable.
  • the olefin-based polymer include poly ⁇ -olefin polymers. More specifically, as the poly ⁇ -olefin polymer, an amorphous-poly ⁇ -olefin polymer (APAO), a homopolymer of propylene (propylene homopolymer) and the like are preferable. More specifically, as a propylene homopolymer, a propylene homopolymer obtained by polymerizing propylene using a single site catalyst such as a metallocene catalyst is preferable.
  • APAO amorphous-poly ⁇ -olefin polymer
  • propylene homopolymer a propylene homopolymer obtained by polymerizing propylene using a single site catalyst such as a metallocene catalyst is preferable.
  • thermoplastic polymers In the pressure-sensitive adhesive composition of this embodiment, one or more of the above-described thermoplastic polymers can be used in combination.
  • the content of the thermoplastic polymer is not limited, but is preferably 40% by mass or less in proportion to the entire pressure-sensitive adhesive composition. When the content of the thermoplastic polymer is more than 40% by mass, the adhesion tends to be reduced.
  • the content of the thermoplastic polymer is more preferably 35% by mass or less.
  • the lower limit is not particularly limited, but from the viewpoint of insufficient cohesion, the content of the thermoplastic polymer is preferably at least 15% by mass or more. More preferably, it is 20 mass% or more.
  • the tackifying resin used in the present embodiment is not particularly limited as long as it is a tackifying resin generally used as a raw material of the pressure-sensitive adhesive composition.
  • Specific tackifying resins include, for example, rosin resins, terpene resins, and petroleum resins.
  • the rosin resin examples include natural rosins such as gum rosin, tall rosin and wood rosin, asymmetric rosins, polymerized rosins, glycerin esters of these rosins, and pentaerythritol esters.
  • the rosin resin is preferably a hydrogenated one, that is, a hydrogenated product (hydrogenated product) of the above rosin resin.
  • terpene resin examples include terpene resin, hydrocarbon modified terpene resin, aromatic modified terpene resin, and phenolic modified terpene resin.
  • the terpene resin is preferably a hydrogenated one, that is, a hydride of the terpene resin.
  • a terpene resin aromatic modified terpene resin hydride, aromatic modified terpene resin hydride, and terpene resin hydride are mentioned as a preferable example, Among these, aromatic modified terpene resin hydride is more preferable.
  • the petroleum-based resin examples include aliphatic petroleum resins, alicyclic petroleum resins, aromatic petroleum resins and the like.
  • the petroleum resin is preferably hydrogenated, that is, a hydride of the above-mentioned petroleum resin.
  • the petroleum resin hydride aliphatic petroleum resin hydride, alicyclic petroleum resin hydride and aromatic petroleum resin hydride are preferable.
  • an alicyclic type petroleum resin hydride hydrogenated C9 petroleum resin, hydrogenated dicyclopentadiene type petroleum resin, etc. are mentioned, for example.
  • the tackifying resins exemplified above may be used alone or in combination of two or more.
  • the content of the tackifying resin is not particularly limited, but it is preferably 65% by mass or less in a ratio to the entire pressure-sensitive adhesive composition, and the adhesive residue is easily generated when the content is more than this.
  • the content of the tackifier resin is more preferably 60% by mass or less.
  • it is preferable that content of tackifying resin is at least 40 mass% or more from a viewpoint of maintenance of adhesive force. More preferably, it is 45 mass% or more.
  • the ⁇ MeSt resin corresponds to a tackifying resin. Since this ⁇ MeSt resin is a substance that generates a strong odor, a sanitary material using a pressure-sensitive adhesive composition containing such a substance gives discomfort to the user of the sanitary material. Therefore, the pressure-sensitive adhesive composition of the present embodiment does not contain an ⁇ MeSt resin as a tackifying resin which gives the user a sense of discomfort.
  • the softener used in the pressure-sensitive adhesive composition of the present embodiment is not particularly limited as long as it is a softener generally used in the pressure-sensitive adhesive composition.
  • oils such as mineral oils, synthetic oils, and vegetable oils, etc. are mentioned, for example.
  • the mineral oils include process oils and liquid paraffin.
  • the process oil is an oil generally used as a plasticizer such as rubber or thermoplastic elastomer, and is an oil produced in so-called petroleum refining or the like.
  • the process oil is generally a mixture containing an aromatic ring, a naphthene ring and a paraffin chain, and is roughly classified into a paraffinic process oil, a naphthenic process oil and an aromatic process oil.
  • Process oil is paraffin-based, paraffin-based carbon having 50% or more of total carbon number, naphthene-based, having 30% or more naphthenic ring carbon, and 30% or more aromatic carbon It distinguishes from the aromatic system.
  • the paraffinic process oil includes paraffinic compounds having 4 to 155 carbon atoms, preferably paraffinic compounds having 4 to 50 carbon atoms.
  • Specific examples of the paraffin-based process oil include butane, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, tetradecane, tetradecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, eicosane, henicosane, docosan, trichosan.
  • Tetracosan pentadecosan, hexacosan, heptacosane, octacosan, nonacosane, triacontan, hementacontan, dotriacontan, pentatriacontan, pentaconecontan, hexacontan, and n-paraffins such as hemptacontan, isobutane, isopentane, neopentane, isohexane, isopentane , Neohexane, 2,3-dimethylbutane, various methylhexanes, 3-ethylpentane, various dimethylpentanes, 2,2,3-3 Lymethylbutane, 3-methylheptane, various dimethylhexanes, various trimethylpentanes, isononane, 2-methylnonane, isodecane, isoundecane, isododecane,
  • synthetic oils include phosphoric acid esters, chlorinated paraffins, ethylene- ⁇ -olefin oligomers, polybutenes, low molecular weight polybutadienes, polyisoprenes, and hydrogenated products thereof, which are liquid at room temperature. .
  • vegetable oils include olive oil, rice germ oil, corn oil, sasanqua oil, camellia oil, castor oil, jojoba seed oil, and Eucalyptus leaf oil.
  • fatty acid esters include isopropyl myristate, octyl dodecyl thrysylate, glycerin triisooctoate, diisopropyl adipate, diethyl sebacate, cetyl ethylhexanoate, cetyl palmitate, ethylhexyl palmitate, isopropyl palmitate,
  • Medium-chain fatty acid triglyceride ethylene glycol salicylate, glycol distearate and the like can be mentioned.
  • the content of the softener is not limited, but is preferably 25% by mass or less in proportion to the whole pressure-sensitive adhesive composition, and if it is more than this, the oil component exudes from the adhesive and the underwear etc. It may contaminate the object of The content of the softener is more preferably 23% by mass or less.
  • the content of the softener is preferably at least 10% by mass or more from the viewpoint that the viscosity is increased and the coatability is not reduced. More preferably, it is 13% by mass or more.
  • the pressure-sensitive adhesive composition of the present embodiment may contain the thermoplastic polymer, the tackifying resin, and additives other than the softener, etc., as long as the desired properties intended by the present invention are not impaired. Good. Specifically, the addition of an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet light absorber, a filler, a surfactant, a coupling agent, a colorant, an antistatic agent, a flame retardant, a wax, and a plasticizer, etc. It may contain an agent.
  • phenolic antioxidants include 2,6-di-tert-butyl-4-methylphenol, n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2 -Tert-Butyl-6- (3-tert-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxy) Phenyl) propionate] methane etc. are mentioned.
  • organic sulfur-based antioxidants examples include dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, pentaerythyl.
  • examples include lytyl tetrakis (3-lauryl thiopropionate) and the like.
  • the above-exemplified antioxidants may be used alone or in combination of two or more.
  • the wax is not particularly limited as long as it is a wax contained in the pressure-sensitive adhesive composition.
  • the wax include synthetic wax and petroleum wax.
  • synthetic waxes include, for example, polyolefin waxes such as Fischer-Tropsch wax, polyethylene wax and polypropylene wax.
  • petroleum waxes include paraffin wax, microcrystalline wax, and petratam. As these waxes, the waxes exemplified above may be used alone, or two or more of them may be used in combination.
  • the method for producing the pressure-sensitive adhesive composition include a method of heating and melting components constituting the pressure-sensitive adhesive composition, stirring and kneading, and the like. By doing so, a pressure-sensitive adhesive composition having high dispersibility of the components constituting the pressure-sensitive adhesive composition can be obtained.
  • the stirring kneader equipped with the heating apparatus, a roll, a Banbury mixer, a kneader, an extruder etc. are mentioned, for example.
  • the adhesion method using the pressure-sensitive adhesive composition is not particularly limited as long as it can be used as the adhesion method using the pressure-sensitive adhesive composition.
  • a bonding method using the pressure-sensitive adhesive composition for example, the pressure-sensitive adhesive composition is melted by heating. Then, the pressure-sensitive adhesive composition in the molten state is applied to an adherend to be adhered. The adhesive composition is cooled and solidified by being left in contact with the other adherend in contact with the applied adhesive composition. The solidified pressure-sensitive adhesive composition adheres adherends to each other.
  • the method for applying the pressure-sensitive adhesive composition is not particularly limited as long as the pressure-sensitive adhesive composition can be suitably applied to the adherend.
  • Examples of this application method include a contact application method.
  • the contact coating method refers to a coating method in which a device used for coating such as a coating machine is in contact with an adherend when the pressure-sensitive adhesive composition is coated.
  • Examples of the contact coating method include slot coating (slot coat gun and the like manufactured by Nordson Co., Ltd.) and roll coater coating.
  • the pressure-sensitive adhesive composition according to one aspect of the present invention is a pressure-sensitive adhesive composition containing a thermoplastic polymer as a base polymer, which does not contain an ⁇ -methylstyrene resin, and the temperature: 40 ° C., frequency:
  • the storage elastic modulus G ′ at 0.1 Hz satisfies at least one of 20000 Pa or more, the temperature: 40 ° C., and the frequency: 0.1 Hz loss elastic modulus G ′ ′ at 4300 Pa or more, and the temperature: 40 ° C.
  • the storage elastic modulus G ′ at a frequency of 1 Hz is 32000 Pa or less, and the temperature: 40 ° C., and the loss elastic modulus G ′ ′ at a frequency of 1 Hz is at least 11000 Pa.
  • thermoplastic polymer is preferably a non-hydrogenated thermoplastic polymer. This has the advantage that the cost can be reduced.
  • Thermoplastic polymer 1 Styrene-butadiene-styrene block copolymer (linear SBS) (Asaprene T-438, manufactured by Asahi Kasei Corporation, content of styrene (second block): 35% by mass, content of diblock body: 65 mass%)
  • Thermoplastic polymer 2 Styrene-butadiene-styrene block copolymer (linear SBS) (Asaprene T-436 manufactured by Asahi Kasei Corporation, content of styrene (second block): 30% by mass, content of diblock body: 50 mass%)
  • Thermoplastic polymer 3 styrene-butadiene-styrene block copolymer (linear SBS) (Asaprene T-439 manufactured by Asahi Kasei Co., Ltd., content of styrene (second block): 45% by mass,
  • the content of styrene corresponds to the content of the second block made of a vinyl aromatic hydrocarbon.
  • the content of the diblock body corresponds to the content of the diblock body of the first block comprising the conjugated diene compound and the second block comprising the vinyl aromatic hydrocarbon.
  • Tackifying resin alicyclic petroleum resin hydride (hydrogenated C9 petroleum resin) (Arcon M-100 manufactured by Arakawa Chemical Industries, Ltd.)
  • Softener Oil: Oil (Diana Flecia S32 manufactured by Idemitsu Kosan Co., Ltd.)
  • Antioxidant Primary antioxidant (IRGANOX 1010 manufactured by BASF)
  • the “adhesive residue” and the “initial adhesive force” of each of the obtained pressure-sensitive adhesive compositions were evaluated by the following methods.
  • the storage modulus G ′ at a frequency of 0.1 Hz and the loss modulus G ′ ′ at a frequency of 0.1 Hz, and the storage modulus G ′ at a frequency of 1 Hz and a loss modulus G ′ ′ are measured.
  • the correlation with “initial adhesion” was evaluated.
  • the odor of each pressure-sensitive adhesive composition was also evaluated.
  • a polyethylene film was attached to the surface of the hygienic material, and various adhesive compositions were coated on the polyethylene film using a coater so as to be 30 g / m 2 to prepare a test substrate.
  • a cotton cloth underwear is assumed
  • a load of 3.5 kg was applied thereto at 40 ° C. for 2 hours.
  • the cotton cloth was peeled off, and the peel strength per 25 mm was measured, and the state where the pressure-sensitive adhesive composition remained on the cotton cloth was confirmed by visual observation and touch inspection, and the adhesive residue was evaluated by the following evaluation criteria.
  • Table 2 also shows the plasticizer content and the rubber component (thermoplastic polymer) content for reference. These values are values converted to mass%.
  • Comparative Examples 1 to 5 are examples lacking any of the requirements specified in the present invention and do not satisfy any of the required characteristics.
  • the loss modulus of elasticity G ′ ′ at a temperature of 40 ° C. and a frequency of 1 Hz is 11000 Pa or less and the initial tack is good, but the temperature is 40 ° C. and the frequency is 0.1 Hz
  • Storage elastic modulus G ′ and loss elastic modulus G ′ ′ out of the range specified in the present invention, and adhesive residue is generated.
  • the loss elastic modulus G ′ ′ at a temperature of 40 ° C. and a frequency of 0.1 Hz is 4300 Pa or more and no adhesive residue occurs, but the storage elasticity at a temperature of 40 ° C. and a frequency of 1 Hz
  • the modulus G ′ and the loss modulus G ′ ′ are out of the range specified in the present invention, and the initial adhesion is extremely reduced.
  • the storage elastic modulus G ′ at a temperature of 40 ° C. and a frequency of 0.1 Hz is 20000 Pa or less, and “adhesion residue” is not generated, and a temperature of 40 ° C. and a frequency of 1 Hz
  • the loss elastic modulus G ′ ′ is 11,000 Pa or less and the initial tackiness shows a good value, it is an example including an ⁇ -methylstyrene resin and a strong odor is generated.
  • the present invention has wide industrial applicability in the technical field related to adhesives and hygiene products.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention concerne selon un aspect une composition adhésive qui contient un polymère thermoplastique comme polymère de base, où : la composition ne contient pas de résine à base d'α-méthyl styrène ; le module au stockage G' à une température de 40 ºC et une fréquence de 0,1 Hz n'est pas inférieur à 20 000 Pa, et/ou le module d'élasticité de perte G'' à une température de 40 ºC et une fréquence de 0,1 Hz n'est pas inférieur à 4 300 Pa ; et le module au stockage G' à une température de 40 ºC et une fréquence de 1 Hz n'est pas supérieur à 32 000 Pa, et/ou le module d'élasticité de perte G'' à une température de 40 ºC et une fréquence de 1 Hz n'est pas supérieur à 11 000 Pa.
PCT/JP2018/032673 2017-10-03 2018-09-03 Composition adhésive WO2019069610A1 (fr)

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CN201880062772.4A CN111148812A (zh) 2017-10-03 2018-09-03 粘合剂组合物
JP2019546582A JP6891288B2 (ja) 2017-10-03 2018-09-03 粘着剤組成物

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021070745A (ja) * 2019-10-30 2021-05-06 株式会社イノアック技術研究所 ホットメルト粘着剤組成物
WO2021251124A1 (fr) * 2020-06-11 2021-12-16 株式会社Moresco Corps d'emballage
WO2022018003A1 (fr) 2020-07-21 2022-01-27 Bostik Sa Composition adhésive thermofusible

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