WO2017073153A1 - 接着剤組成物およびホットメルト接着剤 - Google Patents
接着剤組成物およびホットメルト接着剤 Download PDFInfo
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- WO2017073153A1 WO2017073153A1 PCT/JP2016/074946 JP2016074946W WO2017073153A1 WO 2017073153 A1 WO2017073153 A1 WO 2017073153A1 JP 2016074946 W JP2016074946 W JP 2016074946W WO 2017073153 A1 WO2017073153 A1 WO 2017073153A1
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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
- 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
- C09J123/02—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 not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/12—Polypropene
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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
- 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
- C09J123/02—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 not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- 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
- C09J123/02—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 not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
-
- 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
- C09J123/02—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 not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/14—Copolymers of propene
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
Definitions
- the present invention relates to an adhesive composition using a polyolefin-based resin, and particularly to a hot melt adhesive suitable for bonding between a polyolefin resin substrate and a polar material.
- Polyolefin materials such as polypropylene and polyethylene are used in various industrial fields because they are easily available and have excellent moldability. However, since polyolefin has no polar group in the molecule, it is chemically inactive and has extremely poor adhesion. In general, adhesion using an organic solvent-based adhesive is performed. However, in recent years, restrictions on the use of organic solvents have become stricter, and various adhesions that do not use organic solvents have been studied. As one of solventless bonding methods, hot melt adhesives are widely used because of their easy workability and easy handling.
- Patent Document 1 As an adhesive component using a polyolefin resin, an acid-modified polyolefin resin composition in which an ethylene-vinyl alcohol copolymer resin is blended with an acid-modified polyolefin resin has been proposed (Patent Document 1).
- Patent Document 2 a method of blending an ⁇ -olefin copolymer with a tackifier has been proposed.
- the present invention has been made from the above viewpoint, and can be used for adhesion to a polyolefin substrate or a polar material by containing a specific acid-modified polypropylene, non-functionalized polypropylene, and polyethylene without blending a tackifier.
- An object of the present invention is to provide a hot melt adhesive that can be bonded at a low temperature (140 ° C. or lower) by setting the melting point within a predetermined range.
- this invention is the adhesive composition using the polyolefin resin shown below, and a hot-melt-adhesive using the same.
- a hot melt adhesive containing the above adhesive composition and a laminate of a polyolefin resin base material and a polar material bonded by the hot melt adhesive.
- the adhesive composition according to the present invention contains acid-modified polypropylene, unfunctionalized polypropylene, and polyethylene, and has a melting point of 70 to 140 ° C., so that a low-melting-point substrate such as a polyolefin resin substrate is heat-sealed.
- a low-melting-point substrate such as a polyolefin resin substrate is heat-sealed.
- low temperature adhesion at 140 ° C. or lower is possible without damaging the polyolefin resin substrate.
- it has high adhesiveness with a polyolefin resin base material.
- the acid-modified polypropylene (A) used in the present invention is not limited, but at least one of homopolypropylene and propylene- ⁇ -olefin copolymer includes at least one of ⁇ , ⁇ -unsaturated carboxylic acid and acid anhydride thereof. It can be obtained by grafting (hereinafter also referred to as acid modification).
- the propylene- ⁇ -olefin copolymer is a copolymer in which ⁇ -olefin is copolymerized mainly with propylene.
- ⁇ -olefin for example, ethylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate or the like can be used. Of these ⁇ -olefins, ethylene and 1-butene are preferred.
- the ratio of the propylene component to the ⁇ -olefin component of the propylene- ⁇ -olefin copolymer is not limited, but the propylene component is preferably 50 mol% or more, and more preferably 70 mol% or more. *
- Examples of at least one of ⁇ , ⁇ -unsaturated carboxylic acid and acid anhydrides thereof include maleic acid, itaconic acid, citraconic acid, and acid anhydrides thereof.
- acid anhydrides are preferable, and maleic anhydride is more preferable.
- Specific examples include maleic anhydride-modified polypropylene, maleic anhydride-modified propylene-ethylene copolymer, maleic anhydride-modified propylene-butene copolymer, maleic anhydride-modified propylene-ethylene-butene copolymer, and the like. These acid-modified polypropylenes can be used alone or in combination of two or more.
- the acid value (mgKOH / g-resin) of the acid-modified polypropylene (A) is preferably 3 mgKOH / g-resin or more, more preferably 6 mgKOH / g-resin or more from the viewpoint of adhesion between the polar material and the polyolefin resin substrate. Preferably, 9 mgKOH / g-resin or more is more preferable.
- the acid value is less than 3 mgKOH / g-resin, the adhesion to the polar material may be impaired.
- 50 mgKOH / g-resin or less is preferable and 30 mgKOH / g-resin or less is more preferable. If it exceeds 50 mgKOH / g-resin, the adhesion to the polyolefin resin substrate may be lowered.
- the melting point of the acid-modified polypropylene (A) is preferably 65 ° C. or higher, more preferably 80 ° C. or higher, and further preferably 90 ° C. or higher. If it is less than the above value, granulation may be difficult. Moreover, it is preferable that it is 140 degrees C or less, and it is more preferable that it is 130 degrees C or less. When the above value is exceeded, the low temperature heat sealability may be impaired.
- a low melting point unfunctionalized polypropylene is preferably 70 ° C or higher, more preferably 95 ° C or higher, preferably 145 ° C or lower, and more preferably 135 ° C or lower.
- the melting point of the acid-modified polypropylene (A) is preferably 5 to 10 ° C. lower than the unfunctionalized polypropylene (B) described later.
- the melt viscosity at 230 ° C. of the acid-modified polypropylene (A) is preferably 1000 mPa ⁇ s or more, and more preferably 2000 mPa ⁇ s or more. If it is less than the above value, granulation may be difficult. Moreover, it is preferable that it is 20000 mPa * s or less, and it is more preferable that it is 10000 mPa * s or less. When the above value is exceeded, the open time is shortened, and workability may be deteriorated.
- the acid-modified polypropylene (A) is preferably crystalline. Crystallinity is advantageous because it has a stronger cohesive force and better adhesion and chemical resistance than amorphous.
- the crystallinity referred to in the present invention means that the temperature is raised from ⁇ 100 ° C. to 250 ° C. at 20 ° C./min using a differential scanning calorimeter (DSC), and a clear melting peak is formed in the temperature raising process. Refers to what is shown.
- the production method of the acid-modified polypropylene (A) is not particularly limited, and for example, radical graft reaction (that is, a radical species is generated with respect to a polymer that becomes a main chain, and the radical species is used as a polymerization initiation point to produce an unsaturated carboxylic acid and Reaction for graft polymerization of an acid anhydride).
- radical graft reaction that is, a radical species is generated with respect to a polymer that becomes a main chain, and the radical species is used as a polymerization initiation point to produce an unsaturated carboxylic acid and Reaction for graft polymerization of an acid anhydride.
- Organic peroxides include di-tert-butyl peroxyphthalate, tert-butyl hydroperoxide, dicumyl peroxide, benzoyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexano Peroxides such as ate, tert-butyl peroxypivalate, methyl ethyl ketone peroxide, di-tert-butyl peroxide, lauroyl peroxide; azonitriles such as azobisisobutyronitrile and azobisisopropionitrile It is done.
- the non-functionalized polypropylene (B) used in the present invention is not limited, but is a homopolypropylene or a propylene- ⁇ -olefin copolymer, and is not subjected to the above-mentioned acid modification or even when acid modification is performed.
- the acid value is less than 3 mgKOH / g-resin.
- the acid value is preferably 2 mgKOH / g-resin or less, more preferably 1 mgKOH / g-resin or less, and still more preferably 0.1 mgKOH / g-resin or less.
- the propylene- ⁇ -olefin copolymer is a copolymer in which ⁇ -olefin is copolymerized mainly with propylene.
- ⁇ -olefin for example, ethylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate or the like can be used. Of these ⁇ -olefins, ethylene and 1-butene are preferred.
- the ratio of the propylene component to the ⁇ -olefin component of the propylene- ⁇ -olefin copolymer is not limited, but the propylene component is preferably 50 mol% or more, and more preferably 70 mol% or more.
- the unfunctionalized polypropylene (B) is preferably not grafted with a polar group such as a hydroxyl group, a carboxyl group or an epoxy group in addition to the acid modification.
- a polar group such as a hydroxyl group, a carboxyl group or an epoxy group in addition to the acid modification.
- not grafted means that the graft amount is less than 0.3% by mass, preferably 0.2% by mass or less, more preferably 0.1% by mass or less, and further preferably Is 0.01 mass% or less.
- the melting point of unfunctionalized polypropylene (B) is preferably 70 ° C. or higher, and more preferably 95 ° C. or higher. If it is less than the above value, granulation may be difficult. Moreover, it is preferable that it is 145 degrees C or less, and it is more preferable that it is 135 degrees C or less. When the above value is exceeded, the low temperature heat sealability may be impaired.
- the melt flow rate (MFR) at 230 ° C. of the unfunctionalized polypropylene (B) is preferably 1 g / 10 minutes or more, and more preferably 2 g / 10 minutes or more. If it is less than the above value, the open time may be shortened. Moreover, it is preferable that it is 1000 g / 10min or less, and it is more preferable that it is 500 g / 10min or less. If the above value is exceeded, granulation may be difficult.
- the content of the unfunctionalized polypropylene (B) is preferably 140 parts by mass or more, more preferably 160 parts by mass or more, and 180 parts by mass or more with respect to 100 parts by mass of the acid-modified polypropylene (A). More preferably. If it is less than the above value, the adhesion to the polyolefin resin substrate may be lowered. Moreover, it is preferable that it is 1500 mass parts or less, It is more preferable that it is 1000 mass parts or less, It is further more preferable that it is 800 mass parts or less. When the above value is exceeded, the adhesiveness with the polar material may decrease, which is not preferable.
- Polyethylene (C) used in the present invention is not limited, and examples thereof include high-density polyethylene and low-density polyethylene. Low density polyethylene is preferred because the melting point of the adhesive composition can be easily controlled.
- Polyethylene (C) is not limited, but is preferably homopolyethylene or ethylene- ⁇ -olefin copolymer.
- ⁇ -olefin for example, propylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate and the like can be used. Among these ⁇ -olefins, propylene and 1-butene are preferable.
- the ratio of the ethylene component to the ⁇ -olefin component of the propylene- ⁇ -olefin copolymer is not limited, but the ethylene component is preferably 50 mol% or more, and more preferably 70 mol% or more.
- Polyethylene (C) is preferably not acid-modified as described above or has an acid value of less than 3 mgKOH / g-resin even when acid-modified.
- the acid value is more preferably 2 mgKOH / g-resin or less, further preferably 1 mgKOH / g-resin or less, and particularly preferably 0.1 mgKOH / g-resin or less.
- the density of polyethylene (C) is not particularly limited, but is preferably 0.910 g / cm 3 or more and less than 0.930 g / cm 3 .
- the melting point of polyethylene (C) is preferably 90 ° C. or higher, more preferably 95 ° C. or higher.
- the melting point of polyethylene (C) is lower than 90 ° C., granulation may be difficult, which is not preferable from the viewpoint of productivity.
- it is preferable that it is 130 degrees C or less, and 120 degrees C or less is more preferable. Above 130 ° C, the low temperature adhesion characteristics may be impaired.
- Polyethylene (C) is preferably not acid-modified or has an acid value of 1 mgKOH / g-resin or less even when acid-modified. More preferably, it is 0.1 mgKOH / g-resin or less.
- the melt flow rate (MFR) of polyethylene (C) at 190 ° C. is preferably 0.1 g / 10 min or more, and more preferably 0.2 g / 10 min or more. If it is less than the above value, the open time may be shortened, and workability may deteriorate. Moreover, it is preferable that it is 100 g / 10min or less, and it is more preferable that it is 50 g / 10min or less. If the above value is exceeded, granulation may be difficult.
- the content of polyethylene (C) is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and 20 parts by mass or more with respect to 100 parts by mass of the acid-modified polypropylene (A). Is more preferable. If it is less than the above value, granulation may be difficult, which is not preferable from the viewpoint of productivity. Moreover, it is preferable that it is 600 mass parts or less, It is more preferable that it is 400 mass parts or less, It is further more preferable that it is 200 mass parts or less. If the above value is exceeded, the adhesiveness with the polar material may decrease, which is not preferable.
- the adhesive composition of the present invention is a composition containing acid-modified polypropylene (A), unfunctionalized polypropylene (B) and polyethylene (C) and having a melting point of 70 to 140 ° C.
- composition having a melting point of 70 to 140 ° C. can be obtained.
- the melting point of the adhesive composition according to the present invention is preferably 75 ° C. or higher, more preferably 80 ° C. or higher, and further preferably 90 ° C. or higher.
- the melting point of the adhesive composition is less than 70 ° C., granulation may be difficult, which is not preferable from the viewpoint of productivity.
- a uniform adhesive composition can be obtained by melt-kneading the acid-modified polypropylene (A), unfunctionalized polypropylene (C) and polyethylene (C).
- A acid-modified polypropylene
- C unfunctionalized polypropylene
- C polyethylene
- melt kneading an ordinary plastic melt kneader can be used.
- a single-screw or biaxial kneader-extruder, a heated melt-stirring tank, or the like can be used.
- the adhesive composition of the present invention contains substantially no tackifier.
- “Not substantially contained” in the adhesive composition is preferably 1% by mass or less, more preferably 0.1% by mass or less, and further preferably 0% by mass.
- the tackifier include terpene resins, rosin resins, and petroleum resins.
- the hot melt adhesive of the present invention is a composition containing the adhesive composition and not containing an organic solvent.
- the adhesive composition is preferably contained in an amount of 90% by mass or more, more preferably 95% by mass or more, and further preferably 100% by mass. If the amount is too small, the adhesion to the polyolefin resin substrate or the polar material may decrease.
- the hot melt adhesive according to the present invention can contain various additives as long as the performance of the present invention is not impaired. Although it does not specifically limit as an additive, It is preferable to use a flame retardant, a pigment, an antiblocking agent, etc.
- a polyolefin resin substrate As a polyolefin resin base material, it can select suitably from conventionally well-known polyolefin resin. For example, although not particularly limited, polyethylene, polypropylene, ethylene-propylene copolymer, and the like can be used. Among these, the use of a polypropylene plate (hereinafter also referred to as PP) is preferable.
- the thickness is not particularly limited, but is preferably 0.1 to 5 mm, more preferably 0.5 to 3 mm, and still more preferably 1 to 2 mm. In addition, you may mix
- ⁇ Polar material> Although it does not specifically limit with the polar material of this invention, A metal base material, a polar resin base material, etc. are mentioned. Of these, a metal substrate is preferable.
- metal base material For example, various metals, such as aluminum, copper, steel, SUS, magnesium, zinc, duralumin, and its alloy can be used, Moreover, as the shape, a metal plate, a rolled plate , Panels, pipes, cans, caps, etc. In general, an aluminum plate is preferable from the viewpoint of workability and the like. Although it varies depending on the purpose of use, it is generally used in the form of a sheet having a thickness of 0.01 to 10 mm, preferably 0.02 to 5 mm. Moreover, the surface of these metal base materials may be surface-treated in advance, or may be left untreated.
- plastic materials with high polarity such as nylon, ethylene / vinyl alcohol copolymer resin (EVOH), and a polyethylene terephthalate (PET) can be used as the shape.
- EVOH ethylene / vinyl alcohol copolymer resin
- PET polyethylene terephthalate
- the shape can take any shape. Although it varies depending on the purpose of use, it is generally used in the form of a sheet having a thickness of 0.01 to 10 mm, preferably 0.02 to 5 mm.
- the surface of these polar resin base materials may be surface-treated beforehand, or may be left untreated. In either case, the same effect can be exhibited.
- the laminate of the present invention is obtained by laminating a polar material and a polyolefin resin substrate with the hot melt adhesive according to the present invention (polar material / adhesive layer / polyolefin resin substrate).
- a conventionally known laminate manufacturing technique can be used.
- a hot melt adhesive is applied to the surface of the polar material using an appropriate application means such as a roll coater or a bar coater, and the adhesive layer formed on the surface of the polar material is in a molten state.
- a laminate can be obtained by laminating and bonding a polyolefin resin base material to the coated surface.
- the temperature for thermocompression bonding is not particularly limited, but is preferably 130 ° C or higher, more preferably 140 ° C or higher, preferably 160 ° C or lower, and more preferably 150 ° C or lower.
- the pressure for thermocompression bonding is not particularly limited, but is preferably 0.09 MPa or more, more preferably 0.1 MPa or more, preferably 0.12 MPa or less, and more preferably 0.11 MPa or less.
- the thickness of the adhesive layer formed by the hot melt adhesive is not particularly limited, but is preferably 10 to 100 ⁇ m, more preferably 20 to 80 ⁇ m, and even more preferably 30 to 50 ⁇ m.
- Production Example 2 Maleic anhydride-modified polypropylene (acid) in the same manner as in Production Example 1 except that it was changed to unfunctionalized polypropylene (PO-B2, “Wintech (registered trademark) PP WFW4” manufactured by Nippon Polypro Co., Ltd.) with a melting point of 135 ° C. Modified PO-A2, acid value 15 mgKOH / g-resin, melting point 130 ° C., melt viscosity 3500 mPa ⁇ s) were obtained.
- PO-B2 unfunctionalized polypropylene
- Modified PO-A2 acid value 15 mgKOH / g-resin, melting point 130 ° C., melt viscosity 3500 mPa ⁇ s
- Production Example 3 A maleic anhydride-modified polypropylene (acid-modified PO-A3, acid-modified PO-A3) was prepared in the same manner as in Production Example 1 except that it was changed to an unfunctionalized polypropylene (PO-B3, “J-105G” manufactured by Prime Polymer Co., Ltd.) having a melting point of 160 ° C. Acid value 8 mgKOH / g-resin, melting point 155 ° C., melt viscosity 4000 mPa ⁇ s).
- Production Example 4 A maleic anhydride-modified polypropylene (acid-modified PO-B) was prepared in the same manner as in Production Example 1 except that it was changed to unfunctionalized polypropylene (PO-B4, "Tafmer (registered trademark) XM7070) manufactured by Mitsui Chemicals, Inc.” A4, acid value 11 mgKOH / g-resin, melting point 65 ° C., melt viscosity 2500 mPa ⁇ s).
- PO-B4 unfunctionalized polypropylene
- A4 acid value 11 mgKOH / g-resin, melting point 65 ° C., melt viscosity 2500 mPa ⁇ s).
- Example 1 10 parts by mass of acid-modified PO-A1 as acid-modified polypropylene (A), 75 parts by mass of unfunctionalized PO-B1 as unfunctionalized polypropylene (B), and 15 parts by mass of PE-1 as polyethylene (C) The mixture was melt kneaded and granulated at 160 ° C. in a 15 mm ⁇ twin screw extruder to obtain a hot melt adhesive.
- Examples 2 to 11 and Comparative Examples 1 to 3 The types and blending amounts of acid-modified polypropylene (A), unfunctionalized polypropylene (B) and polyethylene (C) were changed as shown in Table 1, and Examples 2 to 11 and Comparative Example were carried out in the same manner as Example 1. 1-3 were performed. Table 1 shows the blending amount, adhesiveness, and granulation evaluation.
- Unfunctionalized polypropylene (B) and polyethylene (C) used in Examples and Comparative Examples are as follows.
- Unfunctionalized polypropylene (B) Unfunctionalized PO-B1: propylene-butene copolymer (“Tafmer (registered trademark) XM7090” manufactured by Mitsui Chemicals), melting point 100 ° C., MFR 7 g / 10 min.
- Unfunctionalized PO-B2 propylene-ethylene copolymer ( “Wintech (registered trademark) WFW4” manufactured by Nippon Polypro Co., Ltd.), melting point 135 ° C., MFR 7 g / 10 min.
- Unfunctionalized PO-B3 homopolypropylene (“J-105G” manufactured by Prime Polymer Co., Ltd.), melting point 160 ° C., MFR 9 g / 10 minutes
- Unfunctionalized PO-B4 propylene-butene copolymer (“Tuffmer (registered trademark) XM7070” manufactured by Mitsui Chemicals), melting point 75 ° C., MFR 7 g / 10 minutes [polyethylene (C)]
- PE-1 Low density polyethylene (“Petrocene (registered trademark) 172” manufactured by Tosoh Corporation) melting point 110 ° C., density 0.920 g / cm 3 , MFR 0.30 g / 10 min
- the acid value of the acid value of the measured present invention is, FT-IR (manufactured by Shimadzu Corporation, FT-IR8200PC) was used to create the chloroform solution of maleic anhydride (manufactured by Tokyo Kasei)
- the coefficient (f) obtained from the calibration curve and the absorbance (I) of the stretching peak (1780 cm ⁇ 1 ) of the carbonyl (C ⁇ O) bond of maleic anhydride in the crystalline maleic anhydride-modified polyolefin were calculated by the following formula. Value.
- Acid value [absorbance (I) ⁇ (f) ⁇ 2 ⁇ molecular weight of potassium hydroxide ⁇ 1000 (mg) / molecular weight of maleic anhydride] Molecular weight of maleic anhydride: 98.06 Molecular weight of potassium hydroxide: 56.11
- DSC differential scanning calorimeter
- melt flow rate MFR
- JIS K 7210-1 (2014) Using a melt indexer measurement Co. Toyo Seiki Seisakusho the melt flow rate (MFR), conforming to JIS K 7210-1 (2014), was heated melt at 190 ° C. or 230 ° C., the resin composition in 2160g weight The discharge weight at the time of extruding an object was measured, and converted into an amount per 10 minutes (unit: g / 10 minutes).
- the hot melt adhesives obtained in Examples 1 to 11 and Comparative Examples 1 to 3 were adjusted by thermocompression bonding so as to have a thickness of 50 ⁇ m and laminated on a polar material.
- a polyolefin resin base material is superposed on the surface of the adhesive layer, and the laminate (polar material / adhesive layer / polypropylene) is heat-pressed for 2 minutes at a cylinder temperature of 140 ° C. and 0.1 MPa of a heat seal tester manufactured by Tester Sangyo Co., Ltd. Resin base material) was obtained.
- the adhesive strength of the laminate was measured by a tensile shear test.
- the adhesive composition and hot melt adhesive according to the present invention have good adhesion between an olefin resin substrate and a polar material, and can be heat-sealed at low temperatures without damaging the olefin resin substrate.
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- Laminated Bodies (AREA)
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Abstract
Description
本発明で用いる酸変性ポリプロピレン(A)は限定的ではないが、ホモポリプロピレン及びプロピレン-α-オレフィン共重合体の少なくとも一種に、α、β-不飽和カルボン酸及びその酸無水物の少なくとも一種をグラフト(以下、酸変性ともいう)することにより得られる。
本発明に用いる未官能化ポリプロピレン(B)は、限定的ではないが、ホモポリプロピレンまたはプロピレン-α-オレフィン共重合体であり、上述の酸変性がなされていないか、酸変性がなされた場合でも酸価が3mgKOH/g-resin未満のものをいう。好ましくは酸価が2mgKOH/g-resin以下であり、より好ましくは1mgKOH/g-resin以下であり、さらに好ましくは0.1mgKOH/g-resin以下である。
本発明に用いるポリエチレン(C)は、種類は限定的ではないが高密度ポリエチレン、低密度ポリエチレン等が挙げられる。接着剤組成物の融点を制御しやすいことから低密度ポリエチレンが好ましい。
本発明の接着剤組成物は、酸変性ポリプロピレン(A)、未官能化ポリプロピレン(B)およびポリエチレン(C)を含有し、融点が70~140℃の組成物である。
本発明のホットメルト接着剤は、前記接着剤組成物を含有し、有機溶剤を含有しない組成物である。ホットメルト接着剤中、前記接着剤組成物は90質量%以上含有することが好ましく、95質量%以上含有することがより好ましく、100質量%含有することがさらに好ましい。少なすぎるとポリオレフィン樹脂基材や極性材料との接着性が低下することがある。
ポリオレフィン樹脂基材としては、従来から公知のポリオレフィン樹脂の中から適宜選択することができる。例えば、特に限定されないが、ポリエチレン、ポリプロピレン、エチレン-プロピレン共重合体などを用いることができる。中でも、ポリプロピレン板(以下、PPともいう)の使用が好ましい。その厚さは、特に限定されないが、0.1~5mmであることが好ましく、0.5~3mmであることがより好ましく、1~2mmであることがさらに好ましい。なお、ポリオレフィン樹脂基材には必要に応じて顔料や種々の添加物を配合してもよい。
本発明の極性材料とは、特に限定されないが、金属基材、極性樹脂基材等が挙げられる。なかでも金属基材が好ましい。
本発明の積層体は、極性材料とポリオレフィン樹脂基材とを本発明にかかるホットメルト接着剤で積層(極性材料/接着剤層/ポリオレフィン樹脂基材)したものである。
前記ホットメルト接着剤により形成される接着剤層の厚みは、特に限定されないが、10~100μmにすることが好ましく、20~80μmにすることがより好ましく、30~50μmにすることがさらに好ましい。
1Lオートクレーブに、融点100℃の未官能化ポリプロピレン(未官能化PO-B1、プロピレン-ブテン共重合体(三井化学社製「タフマー(登録商標)XM7090」))を100質量部、トルエン150質量部及び無水マレイン酸10質量部を加え、130℃まで昇温することによって、均一に溶解させた。130℃で未官能化PO-B1溶液にジ-tert-ブチルパーオキサイドを4質量部加え、140℃まで昇温した後、さらに3時間撹拌した。その後、得られた反応液を冷却後、多量のメチルエチルケトンが入った容器に注ぎ、樹脂を析出させた。その後、当該樹脂を含有する液を遠心分離することにより、無水マレイン酸がグラフト重合した酸変性ポリプロピレンと(ポリ)無水マレイン酸および低分子量物とを固液分離し、精製した。その後、減圧下70℃で5時間乾燥させることにより、無水マレイン酸変性ポリプロピレン(酸変性PO-A1、酸価11mgKOH/g-resin、融点95℃、溶融粘度3000mPa・s)を得た。
融点135℃の未官能化ポリプロピレン(PO-B2、日本ポリプロ社製「ウィンテック(登録商標)PP WFW4」)に変更にした以外は製造例1と同様にすることにより無水マレイン酸変性ポリプロピレン (酸変性PO-A2、酸価15mgKOH/g-resin、融点130℃、溶融粘度3500mPa・s)を得た。
融点160℃の未官能化ポリプロピレン(PO-B3、プライムポリマー社製 「J-105G」)に変更にした以外は製造例1と同様にすることにより無水マレイン酸変性ポリプロピレン (酸変性PO-A3、酸価8mgKOH/g-resin、融点155℃、溶融粘度4000mPa・s)を得た。
融点75℃の未官能化ポリプロピレン(PO-B4、三井化学社製「タフマー(登録商標」XM7070)に変更にした以外は製造例1と同様にすることにより無水マレイン酸変性ポリプロピレン (酸変性PO-A4、酸価11mgKOH/g-resin、融点65℃、溶融粘度2500mPa・s)を得た。
酸変性ポリプロピレン(A)として酸変性PO-A1を10質量部、未官能化ポリプロピレン(B)として未官能化PO-B1を75質量部、ポリエチレン(C)としてPE-1を15質量部とを15mmφ二軸押出機にて160℃で溶融混練して造粒化を行い、ホットメルト接着剤を得た。
酸変性ポリプロピレン(A)、未官能化ポリプロピレン(B)及びポリエチレン(C)の種類、配合量を表1に示す通りに変更し、実施例1と同様な方法で実施例2~11、比較例1~3を行った。配合量、接着性及び造粒化評価を表1に示す。
[未官能化ポリプロピレン(B)]
未官能化PO-B1:プロピレン-ブテン共重合体(三井化学社製「タフマー(登録商標)XM7090」)、融点100℃、MFR7g/10分
未官能化PO-B2:プロピレン-エチレン共重合体(日本ポリプロ社製「ウィンテック(登録商標)WFW4」)、融点135℃、MFR7g/10分
未官能化PO-B3:ホモポリプロピレン(プライムポリマー社製「J-105G」)、融点160℃、MFR9g/10分
未官能化PO-B4:プロピレン-ブテン共重合体(三井化学社製「タフマー(登録商標)XM7070」)、融点75℃、MFR7g/10分
[ポリエチレン(C)]
PE-1:低密度ポリエチレン(東ソー社製「ペトロセン(登録商標)172」)融点110℃、密度0.920g/cm3、MFR0.30g/10分
本発明における酸価(mgKOH/g-resin)は、FT-IR(島津製作所社製、FT-IR8200PC)を使用して、無水マレイン酸(東京化成製)のクロロホルム溶液によって作成した検量線から得られる係数(f)、結晶性無水マレイン酸変性ポリオレフィンにおける無水マレイン酸のカルボニル(C=O)結合の伸縮ピーク(1780cm-1)の吸光度(I)を用いて下記式により算出した値である。
酸価(mgKOH/g-resin)=[吸光度(I)×(f)×2×水酸化カリウムの分子量×1000(mg)/無水マレイン酸の分子量]
無水マレイン酸の分子量:98.06 水酸化カリウムの分子量:56.11
サンプル1gを、示差走査熱量計(以下、DSC、ティー・エー・インスツルメント・ジャパン製、Q-2000)を用いて、20℃/分の速度で昇温融解、冷却樹脂化して、再度昇温融解(2nd Run.)した際、吸熱ピークの最も面積が大きい極大点(吸熱ピークが複数観測される場合は、そのうち最も面積が大きい点)を測定した値である。
サンプル10gを単一円筒型回転式粘度系(BROOKFIELD VISCOMETER DV-I型)を使用し、昇温融解(230℃)、溶融した樹脂中でローターを回転させ、発生した粘性抵抗を回転トルクから読み取り、粘度(単位:mPa・s)を決定する。
(株)東洋精機製作所製のメルトインデクサーを用い、JIS K 7210-1(2014)に準拠し、190℃または230℃で昇温融解し、2160g加重で樹脂組成物を押し出したときの吐出重量を測定し、10分あたりの量(単位:g/10分)に換算して表した。
極性材料にはアルミニウム板(日本テストパネル製、A1050P、厚み×幅×長さ=1.6×25×100mm)を使用し、ポリオレフィン樹脂基材にはポリプロピレン板(日本テストパネル社製、PP、厚み×幅×長さ=1.6×25×100mm)を使用した。
実施例1~11、比較例1~3で得られたホットメルト接着剤を厚みが50μmとなるように熱圧着により調整し、極性材料に積層した。次いで接着剤層表面にポリオレフィン樹脂基材を重ね合わせ、テスター産業株式会社製ヒートシールテスターのシリンダー温度140℃、0.1MPaで2分間熱圧着することで積層体(極性材料/接着剤層/ポリプロピレン樹脂基材)を得た。前記積層体の接着強度を引張せん断試験により測定した。
JIS K 6850(1999)接着剤の引張せん断接着強さ試験法に準拠し、オリエンテックコーポレーション社製のテンシロン(登録商標)RTM-100を用いて、25℃雰囲気下で、5mm/分におけるせん断強度を測定した。極性材料/ポリオレフィン樹脂基材間の引張せん断強度(MPa)は3回の試験値の平均値とした。結果を表1に示す。
<評価基準>
○(実用上優れる):7MPa以上
△(実用可能):5MPa以上
×(実用不可能):5MPa未満
15mmφ二軸押出機(テクノベル社製 KZW15TW)から押出吐出されたホットメルト接着剤をストランドカット方式ペレット製造装置にて造粒化した。結果を表1に示す。
<評価基準>
◎(生産性良好):連続運転で8時間以上ストランドカットが可能
○(生産可能):連続運転で4時間以上8時間未満ストランドカット可能
△(生産困難):ストランドカット可能だが連続運転で4時間未満
×(生産不可能):ストランド不可能
Claims (4)
- 酸変性ポリプロピレン(A)、未官能化ポリプロピレン(B)およびポリエチレン(C)を含有し、融点が70~140℃である接着剤組成物。
- 酸変性ポリプロピレン(A)100質量部に対して、未官能化ポリプロピレン(B)140~1500質量部、およびポリエチレン(C)10~600質量部を含有する請求項1に記載の接着剤組成物。
- 請求項1または2に記載の接着剤組成物を含有するホットメルト接着剤。
- 請求項3に記載のホットメルト接着剤によって接着されたポリオレフィン樹脂基材と極性材料の積層体。
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20200023616A1 (en) * | 2017-03-29 | 2020-01-23 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Surface-treated metal plate for polyolefin bonding, composite member, and method for manufacturing composite member |
US11642871B2 (en) * | 2017-03-29 | 2023-05-09 | Kobe Steel, Ltd. | Surface-treated metal plate for polyolefin bonding, composite member, and method for manufacturing composite member |
JP2019156971A (ja) * | 2018-03-13 | 2019-09-19 | 三井化学株式会社 | ポリオレフィン組成物および積層体 |
JP7107706B2 (ja) | 2018-03-13 | 2022-07-27 | 三井化学株式会社 | ポリオレフィン組成物および積層体 |
JP2019210369A (ja) * | 2018-06-04 | 2019-12-12 | 協立化学産業株式会社 | 熱溶融性接着剤組成物、電極積層体の製造方法及び電極積層体を備える二次電池 |
JP7093533B2 (ja) | 2018-06-04 | 2022-06-30 | 協立化学産業株式会社 | 熱溶融性接着剤組成物、電極積層体の製造方法及び電極積層体を備える二次電池 |
JP2020111745A (ja) * | 2019-01-16 | 2020-07-27 | Mcppイノベーション合同会社 | 接着性樹脂組成物及び積層体 |
JP7415573B2 (ja) | 2019-01-16 | 2024-01-17 | Mcppイノベーション合同会社 | 接着性樹脂組成物及び積層体 |
WO2021256416A1 (ja) * | 2020-06-16 | 2021-12-23 | 東亞合成株式会社 | 接着剤組成物 |
Also Published As
Publication number | Publication date |
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EP3369795B1 (en) | 2021-12-29 |
EP3369795A1 (en) | 2018-09-05 |
JPWO2017073153A1 (ja) | 2018-08-09 |
JP6859953B2 (ja) | 2021-04-14 |
US20180305592A1 (en) | 2018-10-25 |
EP3369795A4 (en) | 2019-04-10 |
TWI751983B (zh) | 2022-01-11 |
ES2907131T3 (es) | 2022-04-22 |
TW201728724A (zh) | 2017-08-16 |
KR102514750B1 (ko) | 2023-03-27 |
CN108138018B (zh) | 2020-12-01 |
US11104829B2 (en) | 2021-08-31 |
CN108138018A (zh) | 2018-06-08 |
KR20180075489A (ko) | 2018-07-04 |
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