WO2016104510A1 - 接着剤組成物および積層体 - Google Patents
接着剤組成物および積層体 Download PDFInfo
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- WO2016104510A1 WO2016104510A1 PCT/JP2015/085847 JP2015085847W WO2016104510A1 WO 2016104510 A1 WO2016104510 A1 WO 2016104510A1 JP 2015085847 W JP2015085847 W JP 2015085847W WO 2016104510 A1 WO2016104510 A1 WO 2016104510A1
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- WIPO (PCT)
- Prior art keywords
- alcohol
- adhesive composition
- polyol
- acid
- isocyanate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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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
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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
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
- C08G18/2825—Alkanols, cycloalkanols or arylalkanols including terpenealcohols having at least 6 carbon atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/283—Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/284—Compounds containing ester groups, e.g. oxyalkylated monocarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
- C08G18/4216—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols from mixtures or combinations of aromatic dicarboxylic acids and aliphatic dicarboxylic acids and dialcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/725—Combination of polyisocyanates of C08G18/78 with other polyisocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7831—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing biuret groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/8064—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with monohydroxy compounds
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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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
- C09J2301/312—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 parameters being the characterizing feature
Definitions
- the present invention relates to an adhesive composition and a laminate.
- Laminate composite films containing metal foils used for high-temperature sterilization treatment also have various metal foils. Solvent-free laminating adhesives used for bonding between plastic films are being studied.
- a solvent-type laminate adhesive used for a laminate composite film including such a metal foil a two-component adhesive containing a polyol compound as a main agent and a polyisocyanate compound as a curing agent has been suitably used.
- a two-component adhesive containing a polyol compound as a main agent and a polyisocyanate compound as a curing agent has been suitably used.
- introduction of an acid group at the molecular end of the polyol compound and a method of using phosphoric acid together as an additive are widely known (for example, Patent Document 1 or 2).
- a solvent-free adhesive in consideration of the problem of increasing viscosity due to the absence of solvent, in order to give sufficient adhesive strength and acid resistance to the contents after curing, a low molecular weight type is generally used.
- a method of applying a two-component solventless adhesive containing a polyol compound and a polyisocyanate compound to a substrate under high temperature conditions is used.
- solvent-free adhesives have a markedly faster curing reaction rate than solvent-based adhesives, so they give acid resistance to metal foils when used, for example, as a laminate adhesive for high-temperature sterilization treatment.
- an acid group is introduced into the main agent for the purpose of curing, the curing is further accelerated by the urethanization catalyst effect of the acid group, the viscosity rises rapidly after the main agent and the curing agent are blended, and workability is significantly impaired. was there.
- Patent Document 3 proposes a method in which 30% or more of the total hydroxyl groups in the main component polyol are secondary or tertiary hydroxyl groups to reduce the reactivity of the hydroxyl groups.
- a solvent-free adhesive that can suppress an increase in viscosity and has good acid resistance even when the slag is introduced is disclosed.
- the secondary or tertiary hydroxyl group has a reactivity with an isocyanato group equal to or less than that of water, so that it is easily affected by moisture in the air at the time of curing.
- the amount of reaction between the isocyanato group and water is increased as compared with the case of low humidity, so that there is a problem that the adhesive strength and acid resistance are deteriorated.
- Patent Document 4 uses a diisocyanate-terminated prepolymer and an allophanate-modified diisocyanate obtained by reacting a part of an isocyanato group with an alcohol, and improves the resistance to physical properties after heat sterilization. It is disclosed that a safe pot life and workability can be ensured.
- Japanese Patent Publication No. 7-94654 Japanese Patent Laid-Open No. 2-84482 Japanese Patent No. 4631093 JP 2011-162656 A
- the present invention is a laminate composite film containing a metal foil used for high-temperature sterilization treatment, hardly affected by moisture in the air at the time of curing, and has good workability when used as a solventless adhesive, Is intended to provide an adhesive having excellent adhesive strength and acid resistance.
- a polyisocyanate (A) containing a trifunctional or higher functional isocyanate compound (C1) and an alcohol-added isocyanate (E) and an alcohol (B) having an acid value of 0.5 to 30 mgKOH / g are contained in the polyisocyanate (A).
- a method for producing an adhesive composition comprising the step of mixing so that the equivalent ratio (isocyanato group / hydroxyl group) of the isocyanato group of said alcohol and the hydroxyl group in alcohol (B) is 0.7 to 2.5 To do.
- the alcohol-added isocyanate (E) may be contained in an amount of 20 to 80% by weight in 100% by weight of the polyisocyanate (A).
- the trifunctional or higher functional isocyanate compound (C1) is a trimer of at least one diisocyanate compound selected from the group consisting of aliphatic diisocyanates, araliphatic diisocyanates, and alicyclic diisocyanates. It may be.
- the trifunctional or higher functional isocyanate compound (C2) is a trimer of at least one diisocyanate compound selected from the group consisting of aliphatic diisocyanates, araliphatic diisocyanates, and alicyclic diisocyanates. It may be.
- the monofunctional alcohol (D) may be an alicyclic alcohol (D1).
- the alcohol (B) may contain a polyol (B1) having an acid value of 1 to 15 mgKOH / g.
- 70 mol% or more may be a primary hydroxyl group out of 100 mol% of the total amount of hydroxyl groups in the polyol (B1).
- the alcohol (B) includes a polyol (B1) having an acid value of 15 to 40 mg KOH / g and a monofunctional alcohol (B2), and the alcohol (B) in 100% by weight of the alcohol (B)
- the content of the monofunctional alcohol (B2) may be 50% by weight or less.
- One embodiment of the present invention provides an adhesive composition that satisfies the relationship of Formula 1 below: (1) Xa / 56.1 ⁇ Xc ⁇ Yh / 56.1 ⁇ Yc ⁇ 0.26 (Where Xa is the acid value of the polyol (B1) (mgKOH / g), Xc is the weight ratio of the polyol (B1) in the total weight of the polyol (B1) and the monofunctional alcohol (B2), Yh is the hydroxyl value of monofunctional alcohol (B2) (mgKOH / g), Yc is a weight ratio of the monofunctional alcohol (B2) in the total weight of the polyol (B1) and the monofunctional alcohol (B2). ).
- the molecular weight of the monofunctional alcohol (B2) may be 100 or more and 6000 or less.
- the adhesive composition may be a solventless type.
- the adhesive composition may be for a laminated composite film including a metal foil.
- One embodiment of the present invention provides a method for producing a laminate, comprising the step of laminating at least two sheet-like substrates using an adhesive composition produced by the production method of the present invention.
- an alcohol-added isocyanate (E) by reacting; A polyisocyanate (A) containing a trifunctional or higher functional isocyanate compound (C1) and an alcohol-added isocyanate (E) and an alcohol (B) having an acid value of 0.5 to 30 mgKOH / g are contained in the polyisocyanate (A). A step of obtaining an adhesive composition by mixing so that an equivalent ratio (isocyanato group / hydroxyl group) of the isocyanato group and the hydroxyl group in the alcohol (B) is 0.7 to 2.5; And laminating at least two sheet-like substrates using the obtained adhesive composition.
- An adhesive composition comprising polyisocyanate (A) and alcohol (B),
- the polyisocyanate (A) includes a trifunctional or higher functional isocyanate compound (C1) and an alcohol-added isocyanate (E).
- Isocyanate group monofunctional alcohol (D) in the isocyanate compound (C2) in which the alcohol-added isocyanate (E) is a trifunctional or higher functional isocyanate compound (C2) and a monofunctional alcohol (D).
- the acid value of the alcohol (B) is 0.5 to 30 mg KOH / g
- the equivalent ratio of the isocyanate group in the polyisocyanate (A) to the hydroxyl group in the alcohol (B) (isocyanato group / hydroxyl group) is 0.7 to 2.5.
- the laminated composite film containing a metal foil used for high-temperature sterilization treatment it is less susceptible to moisture in the air at the time of curing, and has good workability when used as a solventless adhesive, Can provide an adhesive excellent in adhesive strength and acid resistance.
- the present invention is an adhesive composition containing polyisocyanate (A) and alcohol (B).
- the adhesive composition of the present invention may be a so-called two-component curable type in which polyisocyanate (A) and alcohol (B) are mixed at the time of use, or polyisocyanate (A) and alcohol (B) are mixed. A premixed one-pack type may be used.
- the adhesive composition of the present invention is preferably a two-component curable type. Moreover, in the adhesive composition of this invention, you may use multiple types of polyisocyanate (A) and alcohol (B), respectively.
- the alcohol (B) is preferably a mixture of the polyol (B1) and the monofunctional alcohol (B2), but the polyol (B1) alone may be used.
- the polyisocyanate (A) of the present invention is a trifunctional or higher functional isocyanate compound (C1), a trifunctional or higher functional isocyanate compound (C2) and a monofunctional alcohol (D) having an equivalent ratio of a trifunctional or higher functional isocyanate compound (C2).
- an alcohol-added isocyanate (E) that is a reaction product obtained by reacting the monofunctional alcohol (D) in an amount of 25 to 65 mol% with respect to 100 mol% of the isocyanato group therein.
- the proportion of the alcohol-added isocyanate (E) in 100% by weight of the polyisocyanate (A) is preferably 20 to 80% by weight, more preferably 30 to 50% from the viewpoints of acid resistance, pot life and adhesive strength. % By weight.
- the trifunctional or higher functional isocyanate compound (C1) of the present invention is not particularly limited as long as it is a compound having three or more isocyanato groups.
- aliphatic diisocyanate, aromatic diisocyanate, araliphatic diisocyanate, and alicyclic Examples include, but are not limited to, a buret body, a nurate body, an adduct body, an allophanate body, and a urethane prepolymer obtained by reacting an isocyanate and a polyol, which are trimers of diisocyanate compounds such as diisocyanate.
- aliphatic diisocyanate examples include trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate (also known as HDI), pentamethylene diisocyanate, 1,2-propylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate, Examples thereof include, but are not limited to, dodecamethylene diisocyanate and 2,4,4-trimethylhexamethylene diisocyanate.
- aromatic diisocyanates include 1,3-phenylene diisocyanate, 4,4′-diphenyl diisocyanate, 1,4-phenylene diisocyanate, 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6- Tolylene diisocyanate, 4,4'-toluidine diisocyanate, 2,4,6-triisocyanate toluene, 1,3,5-triisocyanate benzene, dianisidine diisocyanate, 4,4'-diphenyl ether diisocyanate, 4,4 ', 4 “-Triphenylmethane triisocyanate and the like can be mentioned, but not limited thereto.
- the araliphatic diisocyanate means an aliphatic isocyanate having one or more aromatic rings in the molecule, for example, m- or p-xylylene diisocyanate (also known as XDI), ⁇ , ⁇ , ⁇ ', ⁇ ' -Tetramethylxylylene diisocyanate (also known as TMXDI) can be mentioned, but is not limited thereto.
- m- or p-xylylene diisocyanate also known as XDI
- ⁇ , ⁇ , ⁇ ', ⁇ ' -Tetramethylxylylene diisocyanate also known as TMXDI
- alicyclic diisocyanate examples include 3-isocyanate methyl-3,5,5-trimethylcyclohexyl isocyanate, isophorone diisocyanate (also known as IPDI), 1,3-cyclopentane diisocyanate, 1,3-cyclohexane diisocyanate, 1,4 -Cyclohexane diisocyanate, methyl-2,4-cyclohexane diisocyanate, methyl-2,6-cyclohexane diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), 1,4-bis (isocyanatomethyl) cyclohexane, etc.
- IPDI isophorone diisocyanate
- 1,3-cyclopentane diisocyanate 1,3-cyclohexane diisocyanate
- 1,4 -Cyclohexane diisocyanate methyl-2,4-cyclohexane diisocyanate
- the polyol constituting the urethane prepolymer is not particularly limited, and various polyols such as a polyether polyol, a polyester polyol, a polyalkylene polyol, and a polycarbonate polyol can be exemplified, but are not limited thereto. These polyols can be used alone or in admixture of two or more.
- polyether polyol for example, an oxirane compound such as ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran is polymerized using, for example, water, ethylene glycol, propylene glycol, trimethylolpropane, and glycerin as a low molecular weight polyol as an initiator.
- oxirane compound such as ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran
- examples include polyether polyols obtained, but are not limited thereto.
- polyester polyol examples include, but are not limited to, for example, a condensate obtained by an esterification reaction of a dibasic acid and a diol, a caprolactone polymer obtained by using the diol as an initiator, a valerolactone polymer, methyl
- examples thereof include a valerolactone polymer, a lactic acid polymer, a castor oil fatty acid polymer, and a reaction product of a hydroxyl group and an acid anhydride in the polycondensate.
- dibasic acid examples include, but are not limited to, for example, adipic acid, isophthalic acid, terephthalic acid, maleic acid, fumaric acid, succinic acid, oxalic acid, malonic acid, pimelic acid, azelaic acid, sebacic acid, Suberic acid, glutaric acid, 1,4-cyclohexyl dicarboxylic acid, dimer acid, hydrogenated dimer acid and the like can be mentioned.
- diol examples include, but are not limited to, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,3-butanediol, 1,6- Hexanediol, 1,8-octanediol, 1,9-nonanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 2-methyl-1,3-propanediol, 3,3,5-trimethyl Pentanediol, 2,4-diethyl-1,5-pentanediol, 1,12-octadecanediol, 1,2-alkanediol, 1,3-alkanediol, 1-monoglyceride, 2-monoglyceride, 1-monoglycerin ether , 2-monoglycerin ether, dimergio
- the acid anhydride is not limited to the following examples, but in addition to phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, Ricacid TMEG-X (where X is 100, 200, 500, 600, S), Ricacid TMA-X (where X is C, 10, 15) and the like.
- polyalkylene polyol examples include, but are not limited to, polybutadiene polyol, hydrogenated polybutadiene polyol, polyisoprene polyol, hydrogenated polyisoprene polyol, and the like.
- polycarbonate polyol examples include polytetramethylene carbonate polyol, polyhexamethylene carbonate polyol, polycyclohexane dimethylene carbonate polyol, poly-3-methyl-1,5-pentanediol carbonate polyol, poly-2-methyl-1,8 -Octanediol carbonate polyol, poly-1,9-nonanediol carbonate polyol, and the like, but are not limited thereto.
- the buret which is diisocyanate compounds, such as aliphatic diisocyanate illustrated above, aromatic diisocyanate, araliphatic diisocyanate, and alicyclic diisocyanate, or those trimers.
- body nurate body, adduct body, allophanate body.
- the number average molecular weight of the trifunctional or higher functional isocyanate compound (C1) is preferably 2,000 or less because the pot life is good.
- the number average molecular weight of the trifunctional or higher functional isocyanate compound (C1) is more preferably 1,500 or less.
- trifunctional or higher functional isocyanate compounds (C1) can be used alone or in admixture of two or more.
- the adhesive composition of the present invention when used as a solvent-free adhesive, the use of alicyclic diisocyanate or aliphatic diisocyanate burette, nurate, adduct, and allophanate is preferred for viscosity and pot life.
- an IPDI nurate body and an HDI burette body or an HDI nurate body in combination.
- the amount of the IPDI nurate used is preferably 10 to 50% by weight, more preferably 20 to 40% by weight in the trifunctional or higher functional isocyanate compound (C1).
- the alcohol-added isocyanate (E) of the present invention comprises a trifunctional or higher functional isocyanate compound (C2) and a monofunctional alcohol (D) with respect to 100 mol% of the isocyanate group in the trifunctional or higher functional isocyanate compound (C2).
- Alcohol (D) is obtained by reacting to 25 to 65 mol%.
- the alcohol-added isocyanate (E) is an adduct (monofunctional to polyfunctional) in which one molecule, two molecules, three molecules or more of a monofunctional alcohol (D) is added to one molecule of a trifunctional or higher functional isocyanate compound (C2). Alcohol addition isocyanate compound).
- the method for producing the alcohol-added isocyanate (E) is not particularly limited, and for example, a tri- or higher functional isocyanate compound (C2) and a monofunctional alcohol (D) are known urethane under an inert gas atmosphere such as nitrogen. It can obtain by making it react by chemical reaction.
- the monofunctional alcohol (D) is preferably 25 to 65 mol% with respect to 100 mol% of the isocyanate group in the trifunctional or higher functional isocyanate compound (C2).
- the reaction rate of the monofunctional alcohol (D) is less than 25 mol%, sufficient acid resistance cannot be obtained, and when the reaction rate is greater than 65 mol%, the adhesive strength decreases.
- the reaction rate is preferably 30 to 50 mol%.
- the alcohol addition isocyanate (E) which is a reaction product may contain an unreacted trifunctional or higher functional isocyanate compound (C2).
- the trifunctional or higher functional isocyanate compound (C2) used as a raw material for the alcohol-added isocyanate (E) is not particularly limited as long as it is a compound having three or more isocyanato groups.
- aliphatic diisocyanate, aromatic diisocyanate, and araliphatic Examples thereof include buret bodies, nurate bodies, adduct bodies, allophanate bodies, and urethane prepolymers obtained by reacting isocyanate and polyol, which are trimers of diisocyanate compounds such as diisocyanate and alicyclic diisocyanate.
- Preferable specific examples of the diisocyanate and the urethane prepolymer include the same as those exemplified as the trifunctional or higher functional isocyanate compound (C1).
- the trifunctional or higher functional isocyanate compound (C2) may be the same as or different from the trifunctional or higher functional isocyanate compound (C1).
- an aliphatic diisocyanate is preferable as the diisocyanate in terms of viscosity, pot life, and acid resistance, and HDI is more preferable.
- the trimer is preferably a burette body, a nurate body, or an adduct body, more preferably a burette body or a nurate body.
- the monofunctional alcohol (D) is not particularly limited as long as it has one hydroxyl group in the molecule, and examples thereof include alicyclic alcohol (D1), aliphatic alcohol, and aromatic alcohol. It is not limited.
- the alicyclic alcohol (D1) is not particularly limited as long as it is an alcohol containing one or more saturated or unsaturated carbocycles having no aromaticity.
- Saturated or unsaturated carbocycles include monocyclic cycloalkanes such as cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, cycloundecane, and cyclododecane; cyclopropene, cyclobutene, cyclo Monocyclic cycloalkenes such as propene, cyclohexene, cycloheptene, and cyclooctene; Bicyclic alkanes such as bicycloundecane and decahydronaphthalene; Bicyclic alkenes such as norbornene and norbornadiene; Tricyclodecane,
- Preferred specific examples of the alicyclic alcohol (D1) include cyclopentanol, methylcyclopentanol, cyclopentylmethanol, cyclopentylpropanol, cyclohexanol, cyclohexylethanol, cyclohexylpropanol, cyclohexylbutanol, methyl-, ethyl-, propyl- and Examples include but are not limited to butylcyclohexanol, cycloheptanol, cyclooctanol, menthol, decahydro-2-naphthol, borneol, hydroxydicyclopentadiene, cholesterol and the like.
- Examples of the aliphatic alcohol include methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, Monofunctional alcohol having a linear alkyl group such as decanol, nonadecanol, eicosanol, henecosanol, docosanol, tricosanol, tetracosanol, pentacosanol, 2-butanol, isobutanol, tert-butanol, 2-pentanol, 3-pentanol, isopentanol, 2-methyl-1-butanol, 2-methyl-3-butanol
- aromatic alcohol examples include benzyl alcohol, methylphenylmethanol, methoxyphenylmethanol, ethylphenylmethanol, ethoxyphenylmethanol, butylphenylmethanol, butoxyphenylmethanol, phenylethanol, methylphenylethanol, methoxyphenylethanol, ethylphenylethanol, Ethoxyphenylethanol, butylphenylethanol, butoxyphenylethanol, phenylpropanol, methylphenylpropanol, methoxyphenylpropanol, ethylphenylpropanol, ethoxyphenylpropanol, butylphenylpropanol, butoxyphenylpropanol, phenylbutanol, methylphenylbutanol, methoxyphenylbutanol , Ethylphenyl butanol, ethoxy phenyl butanol, butyl
- alicyclic alcohol (D1) is particularly preferable from the viewpoint of adhesive strength.
- monofunctional alcohols can be used alone or in admixture of two or more.
- the alcohol (B) of the present invention is not particularly limited as long as the acid value is 0.5 to 30 mgKOH / g, and examples thereof include polyester polyols having an acid group.
- the acid value of the polyol (B) is less than 0.5 mgKOH / g, sufficient acid resistance cannot be obtained, and when it is greater than 30 mgKOH / g, the pot life is deteriorated. It is preferably 1 mgKOH / g to 25 mgKOH / g.
- the alcohol (B) preferably contains the polyol (B1) and the monofunctional alcohol (B2), but the polyol (B1) alone may be used.
- the acid value of the polyol (B1) may be 1 to 15 mgKOH / g.
- the acid value of the polyol (B1) may be 15 to 40 mgKOH / g, and the alcohol (B) is 100% by weight.
- the content of the monofunctional alcohol (B2) therein may be 50% by weight or less.
- the content of the monofunctional alcohol (B2) in 100% by weight of the alcohol (B) is preferably 1 to 50% by weight, more preferably 1 to 40% by weight.
- the polyol (B1) of the present invention is not particularly limited as long as the acid value is 1 to 40 mgKOH / g, and examples thereof include polyester polyols having an acid group.
- the acid value of the polyol (B1) is less than 1 mgKOH / g, sufficient acid resistance cannot be obtained, and when it is greater than 40 mgKOH / g, the pot life is deteriorated.
- the acid value of the polyol (B1) is, for example, 1 to 25 mg KOH / g, 1 to 30 mg KOH / g, 1 to 40 mg KOH / g, 2 to 25 mg KOH / g, 2 to 30 mg KOH / g, 2 to 40 mg KOH / g, and the like. Good.
- the acid value of the polyol (B1) is more preferably 2 mgKOH / g or more and less than 25 mgKOH / g.
- the polyester polyol having an acid group is not limited to the following examples.
- a condensate obtained by esterification reaction of a dibasic acid and a diol, a caprolactone polymer obtained by using the diol as an initiator, and valerolactone Examples include a polymer, a methyl valerolactone polymer, a lactic acid polymer, a castor oil fatty acid polymer, and a reaction product of a hydroxyl group and an acid anhydride in the polycondensate.
- dibasic acid examples include, but are not limited to, for example, adipic acid, isophthalic acid, terephthalic acid, maleic acid, fumaric acid, succinic acid, oxalic acid, malonic acid, pimelic acid, azelaic acid, sebacic acid, Suberic acid, glutaric acid, 1,4-cyclohexyl dicarboxylic acid, dimer acid, hydrogenated dimer acid and the like can be mentioned.
- diol examples include, but are not limited to, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,3-butanediol, 1,6- Hexanediol, 1,8-octanediol, 1,9-nonanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 2-methyl-1,3-propanediol, 3,3,5-trimethyl Pentanediol, 2,4-diethyl-1,5-pentanediol, 1,12-octadecanediol, 1,2-alkanediol, 1,3-alkanediol, 1-monoglyceride, 2-monoglyceride, 1-monoglycerin ether , 2-monoglycerin ether, dimergio
- the acid anhydride is not limited to the following examples, but in addition to phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, Ricacid TMEG-X (where X is 100, 200, 500, 600, S), Ricacid TMA-X (where X is C, 10, 15) and the like.
- the hydroxyl groups in the polyol (B1) it is preferable that 70 mol% or more of the total hydroxyl groups are primary hydroxyl groups, that is, the secondary or tertiary hydroxyl groups are less than 30 mol% of the total hydroxyl groups. This is because the reactivity of the polyol component is increased within this range, and sufficient adhesive strength and acid resistance can be obtained regardless of the humidity conditions during the coating operation and the aging operation.
- the primary hydroxyl group means a group having one carbon atom bonded to the carbon atom to which the hydroxyl group (—OH) is bonded
- the secondary hydroxyl group or the tertiary hydroxyl group is And means a group having 2 or 3 carbon atoms.
- the number average molecular weight of the polyol (B1) is preferably from 300 to 5,000 because of good acid resistance and pot life.
- the number average molecular weight of the polyol (B1) is more preferably 450 to 2000.
- polystyrene resin can be used alone or in admixture of two or more.
- Aliphatic monools include methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol, nonanol, decanol lauryl alcohol, myristyl alcohol, pentadecanol, cetyl alcohol, heptadecanol, stearyl alcohol, nonadecanol, Other alkanols (C20-50), oleyl alcohol, and isomers thereof include, but are not limited to.
- Examples of the alicyclic monool include cyclohexanol, methylcyclohexanol, 4-butylcyclohexanol, 4-pentylcyclohexanol, 4-hexylcyclohexanol, cyclodecanol, cyclododecanol, cyclopentadecanol, and 4-isopropylcyclohexane.
- aromatic aliphatic monools examples include benzyl alcohol, but are not limited thereto.
- polyoxyalkylene monools examples include those obtained by ring-opening addition polymerization of alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran using an alkyl compound containing one active hydrogen as an initiator. However, it is not limited to these.
- oxycarboxylic acid esters include glycolic acid, lactic acid, tartronic acid, glyceric acid, hydroxyacetic acid, hydroxybutyric acid, malic acid, citric acid, isocitric acid, ricinoleic acid, ⁇ -oxypropionic acid, oxysuccinic acid, dioxysuccinic acid, hydroxystearic acid
- examples thereof include, but are not limited to, hydroxyl group-containing esters obtained from oxycarboxylic acids such as acid, ricinoelaidic acid, ricinostearol acid, and mandelic acid and the above monools.
- the number average molecular weight of the monofunctional alcohol (B2) is preferably 100 to 6,000 because the pot life is good.
- the number average molecular weight of the monofunctional alcohol (B2) is more preferably 200 to 4,000.
- a polyol (B1) having an acid value of 1 to 15 mgKOH / g can be used alone.
- the acid value of the polyol (B1) is 1 mgKOH / g or more, sufficient content resistance is obtained, and when it is less than 15 mgKOH / g, the pot life is good.
- they are 2 mgKOH / g or more and less than 10 mgKOH / g.
- higher acid resistance can be achieved by combining the polyol (B1) having an acid value of 15 to 40 mgKOH / g and the monofunctional alcohol (B2).
- the acid value of the polyol (B1) is 15 mgKOH / g or more, high content resistance can be obtained. Moreover, a pot life becomes favorable in it being less than 40 mgKOH / g.
- the acid value of the polyol (B1) may be, for example, 15 to 25 mg KOH / g, 15 to 30 mg KOH / g, 15 to 40 mg KOH / g, and the like.
- the acid value of the polyol (B1) is more preferably 15 mgKOH / g or more and less than 25 mgKOH / g.
- Equation 1 The value on the left side of Equation 1 may be 0.26 or less as described above, but is more preferably 0.23 or less.
- the equivalent ratio of the isocyanate group in the polyisocyanate (A) to the hydroxyl group in the alcohol (B) is 0.7 to 2.5, preferably 0. .8 to 2.5, more preferably 1.0 to 2.0.
- the isocyanato group / hydroxyl ratio is less than 0.7, sufficient adhesive strength cannot be obtained, and when the isocyanato group / hydroxyl ratio is greater than 2.5, acid resistance deteriorates.
- the adhesive composition of the present invention is preferably used as a solventless adhesive from the viewpoint of safety and environmental load reduction, but may contain a small amount of an organic solvent or water as necessary.
- organic solvent examples include, but are not limited to, for example, aliphatic alcohols having 1 to 7 carbon atoms such as methanol, ethanol, normal propanol, isopropanol, normal butanol, isobutanol, and tertiary butanol; propylene glycol Glycol monoethers such as monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monoisopropyl ether, propylene glycol monobutyl ether; ketones such as acetone and methyl ethyl ketone; esters such as ethyl acetate and propyl acetate; Examples thereof include carbonates such as dimethyl carbonate.
- aliphatic alcohols having 1 to 7 carbon atoms such as methanol, ethanol, normal propanol, isopropanol, normal butanol, isobutanol, and tertiary butano
- organic solvents or water can be used alone or in admixture of two or more.
- the adhesive composition of the present invention may further contain a silane coupling agent, phosphorus oxygen acid or a derivative thereof for the purpose of further improving the adhesive strength and acid resistance, and a total of 100% by weight of the alcohol (B).
- the content is preferably 0.01 to 5% by weight, more preferably 0.02 to 3% by weight.
- silane coupling agent examples include ⁇ -aminopropyltriethoxysilane, ⁇ -aminopropyltrimethoxysilane, N- ⁇ (aminoethyl) - ⁇ -aminopropyltrimethoxysilane, and N- ⁇ (aminoethyl) - ⁇ .
- Aminosilanes such as aminopropyltrimethyldimethoxysilane and N-phenyl- ⁇ -aminopropyltrimethoxysilane; epoxy silanes such as ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, Vinylsilanes such as vinyltris ( ⁇ -methoxyethoxy) silane, vinyltriethoxysilane, vinyltrimethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, Examples include hexamethyldisilazane and ⁇ -mercaptopropyltrimethoxysilane, but are not limited thereto.
- the oxygen acid of phosphorus is not particularly limited as long as it has at least one free oxygen acid.
- phosphoric acids such as hypophosphorous acid, phosphorous acid, orthophosphoric acid, hypophosphoric acid, and metaphosphoric acid
- condensed phosphoric acids such as pyrophosphoric acid, tripolyphosphoric acid, polyphosphoric acid, and ultraphosphoric acid.
- Examples of phosphorus oxyacid derivatives include, but are not limited to, those obtained by partially esterifying the above phosphorus oxyacids with alcohols leaving at least one free oxyacid.
- Examples of these alcohols include, but are not limited to, aliphatic alcohols such as methanol, ethanol, ethylene glycol, and glycerin, and aromatic alcohols such as phenol, xylenol, hydroquinone, catechol, and phloroglicinol.
- silane coupling agents and phosphorus oxyacids or derivatives thereof can be used alone or in admixture of two or more.
- the adhesive composition of the present invention includes a filler, a softening agent, an anti-aging agent, a stabilizer, an adhesion promoter, a leveling agent, an antifoaming agent, a plasticizer, an inorganic filler, and an adhesive.
- Additive resins, fibers, usable time extenders, antioxidants, UV absorbers, hydrolysis inhibitors, antifungal agents, thickeners, plasticizers, colorants such as pigments, fillers and other additives Can be contained.
- a method for producing a laminate using the solventless adhesive composition and at least two sheet-like substrates will be described.
- a known method for laminating a solventless adhesive composition can be used. Specifically, polyisocyanate (A) and alcohol (B) are uniformly mixed. The mixed adhesive composition is applied onto an arbitrary sheet-like substrate by a solventless laminator to form an adhesive layer. Thereafter, the adhesive layer and another arbitrary sheet-like base material are bonded together and obtained by aging and curing at room temperature or under heating.
- the coating temperature is usually 40 to 100 ° C., preferably 60 to 90 ° C., considering the workability during coating and the viscosity of the solventless adhesive composition under heating, but it is higher. This is preferable in that elasticity can be imparted when the temperature drops after coating, and winding slippage can be prevented.
- the coating amount is appropriately selected according to the type of substrate, coating conditions, etc., but is usually 1.0 to 5.0 g / m 2 , preferably 1.5 to 4.5 g / m 2 .
- the solventless adhesive composition of the present invention when the polyisocyanate (A) and the alcohol (B) are mixed, from the viewpoint of securing working time, when 30 to 40 minutes have passed under the coating temperature condition.
- the viscosity is preferably 12000 mPa ⁇ s or less, more preferably 8000 mPa ⁇ s or less.
- the sheet-like base material examples include plastic films such as polyester, polyamide, polyethylene, and polypropylene; metal-deposited films on which aluminum, silicon oxide, aluminum oxide, and the like are deposited; metal foils such as stainless steel, iron, copper, and lead are used. It is done.
- plastic films such as polyester, polyamide, polyethylene, and polypropylene
- metal foils such as stainless steel, iron, copper, and lead are used. It is done.
- Such a combination of base materials is appropriately selected according to the application to be used, and may be a plastic film or a plastic film and a metal vapor deposition film or a metal foil.
- the solventless adhesive composition of the present invention is a laminate composite film including a metal foil used for high-temperature sterilization treatment, in particular, a metal foil (such as an aluminum foil) as a barrier layer and a plastic film (for example, it can be suitably used as an adhesive with a polypropylene film or the like.
- One embodiment of the present invention includes the case where the alcohol (B) is the polyol (B1) alone as described above.
- one embodiment of the present invention is an adhesive composition
- a polyisocyanate component (A) and a polyol component (B1) In the polyisocyanate component (A), the trifunctional or higher functional isocyanate compound (C1) is reacted with 25 to 65 mol% of the monofunctional alcohol (D) with respect to 100 mol% of the isocyanate group in the trifunctional or higher functional isocyanate compound (C2).
- a reaction product (E) obtained by The acid value of the polyol component (B1) is 1 to 15 mgKOH / g
- the present invention relates to an adhesive composition characterized in that the equivalent ratio of the isocyanate group in the polyisocyanate component (A) to the hydroxyl group in the polyol component (B1) (isocyanato group / hydroxyl group) is 80/100 to 250/100.
- an embodiment of the present invention relates to the adhesive composition, wherein the reaction product (E) is contained in an amount of 20 to 80% by weight in 100% by weight of the polyisocyanate component (A).
- the amount of at least one diisocyanate compound selected from the group consisting of an aliphatic diisocyanate, an araliphatic diisocyanate, and an alicyclic diisocyanate is a trifunctional or higher functional isocyanate compound (C1).
- the adhesive composition may be a body.
- the trifunctional or higher functional isocyanate compound (C2) is an amount of at least one diisocyanate compound selected from the group consisting of aliphatic diisocyanates, araliphatic diisocyanates, and alicyclic diisocyanates.
- the adhesive composition may be a body.
- one embodiment of the present invention may be the adhesive composition, wherein the monofunctional alcohol (D) is an alicyclic alcohol (D1).
- one embodiment of the present invention may be the adhesive composition, wherein 70 mol% or more of all hydroxyl groups in the polyol (B1) are primary hydroxyl groups.
- an embodiment of the present invention may be the above-mentioned adhesive composition that is a solventless type.
- another embodiment of the present invention includes a laminate obtained by laminating at least two sheet-like substrates using the adhesive composition.
- Viscosity Measured using a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd., model BL).
- Number average molecular weight Use a polystyrene equivalent molecular weight when using Shodex GPC LF-604 (manufactured by Shodex) as a column and GPC (manufactured by Shodex, GPC-104) equipped with an RI detector as a developing solvent. It was.
- Isocyanate equivalent Measured according to JIS K1603-1.
- Alcohol-added isocyanate (E-1) Charge 219.9 parts of hexamethylene diisocyanate burette and 30.1 parts of cyclohexanol (25 mol% with respect to 100 mol% of isocyanato groups) to a reaction vessel, and react at 110 ° C. for 4 hours while stirring under a nitrogen gas stream. The alcohol-added isocyanate (E-1) was obtained.
- Polyol (B1-1) 175 parts of isophthalic acid, 320 parts of adipic acid, 49 parts of benzoic acid, 76 parts of ethylene glycol, and 380 parts of neopentyl glycol are charged into a reaction vessel and heated to 150 ° C. to 240 ° C. with stirring under a nitrogen gas stream for esterification. Reaction was performed. When the acid value reached 2.1 (mg KOH / g), the reaction temperature was 200 ° C., the inside of the reaction vessel was gradually reduced in pressure, reacted at 1.3 kPa or less for 30 minutes, and then cooled to 110 ° C.
- polyol component (B1-1) 5.0 parts of trimellitic anhydride was added and acid-modified at 110 ° C. to obtain a polyol component (B1-1).
- the hydroxyl groups of the resulting polyol (B1-1) were all primary hydroxyl groups, the number average molecular weight was 750, the acid value was 3.6, and the hydroxyl value was 104.
- polyol (B1-3) Thereafter, 28 parts of trimellitic anhydride was added and acid-modified at 110 ° C. to obtain a polyol (B1-3).
- the hydroxyl groups of the obtained polyol (B1-3) were all primary hydroxyl groups, the number average molecular weight was 750, and the acid value was 20.1. The hydroxyl value was 97.
- polyol (B1-4) The hydroxyl groups of the obtained polyol (B1-4) were all primary hydroxyl groups, the number average molecular weight was 750, and the acid value was 15.0. The hydroxyl value was 99.
- B2 ⁇ Monofunctional alcohol (B2)> The following were used as the monofunctional alcohols (B2-1) to (B2-4).
- B2-1 Polyoxypropylene alkyl ether (Product name: UNILOVE MB-38, NOF Corporation, theoretical hydroxyl value 28 mgKOH / g)
- B2-2 Castor oil monofunctional alcohol (Product name: URIC H-31, manufactured by Ito Oil Co., theoretical hydroxyl value 187 mgKOH / g)
- B2-3 polyoxyalkylene alkyl ether (product name: UNILOVE 50MB-72, manufactured by NOF Corporation, theoretical hydroxyl value: 18 mgKOH / g)
- B2-4 Hexyldecanol (Product name: Risonol 16SP, manufactured by Higher Alcohol Industry, theoretical hydroxyl value 231 mgKOH / g)
- Tables 1 and 2 show the composition of each adhesive composition.
- Trifunctional or higher functional isocyanate compounds C1-1) to (C1-5), alcohol-added isocyanates (E-1) to (E-9) or (F), polyols (B1-1) to (B1-5),
- the monofunctional alcohols (B2-1) to (B2-4) and the additives were optionally heated and mixed at the compounding ratios shown in Tables 1 and 2, and Examples 1 to 41 and Comparative Examples 1 to 4 were used.
- a solvent-type adhesive composition was prepared.
- a composite film of polyethylene terephthalate (thickness 12 ⁇ m, hereinafter referred to as PET) / aluminum foil (thickness 9 ⁇ m) / unstretched polypropylene (thickness 70 ⁇ m, hereinafter referred to as CPP) was prepared by the following method.
- a dry laminate adhesive for high retort (product name: TM-250HV / CAT-RT86L-60, manufactured by Toyo Morton Co., Ltd.) is applied to a PET film with a dry laminator to give a coating surface of 3.5 g / m2.
- the obtained laminate was aged in an environment of 40 ° C. for 3 days to obtain a PET / aluminum foil laminate.
- the solventless adhesive compositions of the examples and comparative examples were applied at 70 ° C. with a solventless test coater at a coating amount of 3 g / m 2. After the coating was performed and the coated surface and the CPP were bonded together, the resulting laminate was aged in an environment of 40 ° C. for 3 days to obtain a laminate composite film of PET / aluminum foil / CPP.
- test coater was applied at 60 ° C. and 70 ° C. for Examples 1 to 21 and Comparative Examples 1 to 4, and at 60 ° C. for Examples 22 to 41.
- ⁇ Pot life 60 ° C> About the adhesive composition, the viscosity after 30 minutes of uniform mixing at 60 ° C. was measured, and judged according to the following criteria. The results are shown in Table 1.
- D The viscosity is 15,000 mPa ⁇ s or more.
- the laminated composite film produced by the above method was evaluated for the physical properties of adhesion, retort resistance, and content resistance by the following methods. The results are shown in Table 1.
- the laminate composite film prepared by the above method is cut to a width of 15 mm and pulled at a peeling rate of 300 mm / min in an environment of 25 ° C. and a relative humidity of 50%, and a T-shaped peel strength between NPP and CPP (N / 15 mm).
- the peel strength (N / 15 mm) was measured (denoted as “Adhesive strength after heat sterilization [1]”). Further, regarding the bags stored for 4 weeks in an environment of 55 ° C., the appearance change was also observed visually, and the content resistance was judged according to the following criteria (denoted as “content resistance [1]”). The results are shown in the table.
- B There is no yuzu skin-like pattern or small spot-like pattern, and the adhesive layer is uniform (good).
- C Yuzu skin-like pattern or small spot-like pattern is somewhat observed (can be used).
- D Many yuzu skin-like patterns and small spot-like patterns are observed (unusable).
- the adhesive composition of the present invention has good workability and excellent adhesive strength and acid resistance.
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Abstract
Description
3官能以上のイソシアネート化合物(C2)と単官能アルコール(D)とを、当量比 3官能以上のイソシアネート化合物(C2)中のイソシアナト基:単官能アルコール(D)=100mol%:25~65mol%で反応させることにより、アルコール付加イソシアネート(E)を得るステップと;
3官能以上のイソシアネート化合物(C1)およびアルコール付加イソシアネート(E)を含むポリイソシアネート(A)と、酸価が0.5~30mgKOH/gであるアルコール(B)とを、ポリイソシアネート(A)中のイソシアナト基と、アルコール(B)中の水酸基との当量比(イソシアナト基/水酸基)が0.7~2.5であるように混合するステップ
とを含む、接着剤組成物の製造方法を提供する。
(1)Xa/56.1×Xc-Yh/56.1×Yc≦0.26
(式中、
Xaはポリオール(B1)の酸価(mgKOH/g)、
Xcはポリオール(B1)と単官能アルコール(B2)との合計重量中のポリオール(B1)の重量比、
Yhは単官能アルコール(B2)の水酸基価(mgKOH/g)、
Ycはポリオール(B1)と単官能アルコール(B2)との合計重量中の単官能アルコール(B2)の重量比である。)。
3官能以上のイソシアネート化合物(C2)と単官能アルコール(D)とを、当量比 3官能以上のイソシアネート化合物(C2)中のイソシアナト基:単官能アルコール(D)=100mol%:25~65mol%で反応させることにより、アルコール付加イソシアネート(E)を得るステップと;
3官能以上のイソシアネート化合物(C1)およびアルコール付加イソシアネート(E)を含むポリイソシアネート(A)と、酸価が0.5~30mgKOH/gであるアルコール(B)とを、ポリイソシアネート(A)中のイソシアナト基と、アルコール(B)中の水酸基との当量比(イソシアナト基/水酸基)が0.7~2.5であるように混合することにより接着剤組成物を得るステップと;
得られた接着剤組成物を用いて少なくとも2つのシート状基材を積層させるステップ
とを含んでよい。
ポリイソシアネート(A)とアルコール(B)を含む接着剤組成物であって、
ポリイソシアネート(A)が、3官能以上のイソシアネート化合物(C1)とアルコール付加イソシアネート(E)とを含み、
前記アルコール付加イソシアネート(E)が、3官能以上のイソシアネート化合物(C2)と単官能アルコール(D)とを、当量比 3官能以上のイソシアネート化合物(C2)中のイソシアナト基:単官能アルコール(D)=100mol%:25~65mol%で反応させてなり、
アルコール(B)の酸価が、0.5~30mgKOH/gであり、
ポリイソシアネート(A)中のイソシアナト基と、アルコール(B)中の水酸基との当量比(イソシアナト基/水酸基)が0.7~2.5である、
接着剤組成物を提供する。
本発明のポリイソシアネート(A)は、3官能以上のイソシアネート化合物(C1)と、3官能以上のイソシアネート化合物(C2)および単官能アルコール(D)を当量比が3官能以上のイソシアネート化合物(C2)中のイソシアナト基100mol%に対して単官能アルコール(D)25~65mol%となるように反応させて得られた反応生成物であるアルコール付加イソシアネート(E)とを含んでなる。ポリイソシアネート(A)100重量%中のアルコール付加イソシアネート(E)の割合としては、耐酸性とポットライフ及び接着強度の観点から、20~80重量%であることが好ましく、より好ましくは30~50重量%である。
本発明の3官能以上のイソシアネート化合物(C1)としては、イソシアナト基を3つ以上有する化合物であれば特に限定されないが、例えば、脂肪族ジイソシアネート、芳香族ジイソシアネート、芳香脂肪族ジイソシアネート、および脂環族ジイソシアネート等のジイソシアネート化合物の3量体である、ビュレット体、ヌレート体、アダクト体、アロファネート体、ならびにイソシアネートとポリオールを反応させたウレタンプレポリマー等が挙げられるが、これらに限定されない。
本発明のアルコール付加イソシアネート(E)は、3官能以上のイソシアネート化合物(C2)と単官能アルコール(D)とを、3官能以上のイソシアネート化合物(C2)中のイソシアナト基100mol%に対して単官能アルコール(D)25~65mol%であるように反応させて得られる。アルコール付加イソシアネート(E)は、3官能以上のイソシアネート化合物(C2)1分子に単官能アルコール(D)が1分子、2分子、3分子、またはそれ以上付加した付加体(1官能~多官能のアルコール付加イソシアネート化合物)の混合物である。
アルコール付加イソシアネート(E)の原料となる3官能以上のイソシアネート化合物(C2)は、イソシアナト基を3つ以上有する化合物であれば特に限定されないが、例えば、脂肪族ジイソシアネート、芳香族ジイソシアネート、芳香脂肪族ジイソシアネート、および脂環族ジイソシアネート等のジイソシアネート化合物の3量体である、ビュレット体、ヌレート体、アダクト体、アロファネート体、ならびにイソシアネートとポリオールを反応させたウレタンプレポリマー等が挙げられる。ジイソシアネートおよびウレタンプレポリマーの好ましい具体例としては、3官能以上のイソシアネート化合物(C1)として例示したものと同じものが挙げられる。
単官能アルコール(D)としては、分子中に水酸基を1つ有するものであれば特に限定されないが、例えば、脂環族アルコール(D1)、脂肪族アルコール、芳香族アルコールが挙げられるが、これらに限定されない。
2-ブタノール、イソブタノール、tert-ブタノール、2-ペンタノール、3-ペンタノール、イソペンタノール、2-メチル-1-ブタノール、2-メチル-3-ブタノール、2,2-ジメチル-1-プロパノール、tert-ペンタノール、2-ヘキサノール、3-ヘキサノール、イソヘキサノール、2-メチル-2-ペンタノール、2-メチル-1-ペンタノール、3-メチル-1-ペンタノール、2-エチル-1-ブタノール、3,3-ジメチル-1-ブタノール、2-ヘプタノール、3-ヘプタノール、4-ヘプタノール、5-メチル-1-ヘキサノール、4-メチル-1-ヘキサノール、3-メチル-1-ヘキサノール、2-エチル-2-メチル-1-ブタノール、イソオクタノール、2-エチル-1-ヘキサノール、イソノナノール、3.5.5-トリメチルヘキサノール、イソデカノール、イソウンデカノール、5-エチル-2-ノナノール、イソドデデカノール、イソトリデカノール、イソテトラデカノール、イソペンタデカノール、イソヘキデカノール、2-ヘキシルデカノール、3,9-ジエチル-6-トリデカノール、2-イソヘプチルイソウンデカノール、2-オクチルドデカノール、2-デシルテトラデカノール、2-メチルステアリルアルコール等の分岐アルキル基を有する単官能アルコールが挙げられるが、これらに限定されない。
本発明のアルコール(B)としては、酸価が0.5~30mgKOH/gであれば特に限定されず、例えば、酸基を有するポリエステルポリオール等が挙げられる。ポリオール(B)の酸価が0.5mgKOH/g未満の場合、十分な耐酸性が得られず、30mgKOH/gより大きい場合、ポットライフが悪化する。好ましくは1mgKOH/g~25mgKOH/gである。
本発明のポリオール(B1)としては、酸価が1~40mgKOH/gであれば特に限定されず、例えば、酸基を有するポリエステルポリオール等が挙げられる。ポリオール(B1)の酸価が1mgKOH/g未満の場合、十分な耐酸性が得られず、40mgKOH/gより大きい場合、ポットライフが悪化する。ポリオール(B1)の酸価は、例えば1~25mgKOH/g、1~30mgKOH/g、1~40mgKOH/g、2~25mgKOH/g、2~30mgKOH/g、2~40mgKOH/g、などであってよい。ポリオール(B1)の酸価は、より好ましくは2mgKOH/g以上、25mgKOH/g未満である。
本発明の単官能アルコール(B2)としては特に限定されないが、例えば、脂肪族モノオール、脂環族モノオール、芳香脂肪族モノオール、ポリオキシアルキレンモノオール、及びオキシカルボン酸エステル等が挙げられる。
(1)Xa/56.1×Xc-Yh/56.1×Yc≦0.26
(式中、Xaはポリオール(B1)の酸価(mgKOH/g)、Xcはポリオール(B1)と単官能アルコール(B2)との合計重量中のポリオール成分(B1)の重量比、
Yhは単官能アルコール(B2)の水酸基価(mgKOH/g)、Ycはポリオール(B1)と単官能アルコール(B2)との合計重量中の単官能アルコール(B2)の重量比である。)
β-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、γ-グリシドキシプロピルトリメトキシシラン、γ-グリシドキシプロピルトリエトキシシラン等のエポキシシラン類、
ビニルトリス(β-メトキシエトキシ)シラン、ビニルトリエトキシシラン、ビニルトリメトキシシラン、γ-メタクリロキシプロピルトリメトキシシラン等のビニルシラン類、
ヘキサメチルジシラザン、γ-メルカプトプロピルトリメトキシシラン等を挙げることができるが、これらに限定されない。
ポリイソシアネート成分(A)が、3官能以上のイソシアネート化合物(C1)と、3官能以上のイソシアネート化合物(C2)中のイソシアナト基100mol%に対して単官能アルコール(D)を25~65mol%反応させて得られた反応生成物(E)とを含んでなり、
ポリオール成分(B1)の酸価が、1~15mgKOH/gであり、
ポリイソシアネート成分(A)中のイソシアナト基と、ポリオール成分(B1)中の水酸基の当量比(イソシアナト基/水酸基)が80/100~250/100であることを特徴とする接着剤組成物に関する。
イソシアネート化合物(C1-1)~(C1-3)としては、下記を用いた。
・C1-1:HDIビュレット(製品名:バナソートHB-100、BASF社製)
・C1-2:HDIヌレート(製品名:タケネートD177N、三井化学社製)
・C1-3:IPDIヌレート(製品名:VESTANT T1890/100、エボニック社製)
数平均分子量1,000、平均水酸基数3のポリオキシプロピレングリセリルエーテル166.2部、ヘキサメチレンジイソシアネート83.8部(水酸基100mol%に対してイソシアナト基200mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、数平均分子量1500のイソシアネート化合物(C1-4)を得た。イソシアネート当量は8.4%であった。
数平均分子量600、平均水酸基数2のポリオキシプロピレングリコール87.2部、ヘキサメチレンジイソシアネートのビュレット体162.8部(水酸基100mol%に対してイソシアナト基300mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、数平均分子量1600のイソシアネート化合物(C1-5)を得た。イソシアネート当量は9.8%であった。
(合成例1)アルコール付加イソシアネート(E-1)
ヘキサメチレンジイソシアネートのビュレット体219.9部、シクロヘキサノール30.1部(イソシアナト基100mol%に対して25mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-1)を得た。
ヘキサメチレンジイソシアネートのビュレット体209.8部、シクロヘキサノール40.2部(イソシアナト基100mol%に対して35mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-2)を得た。
ヘキサメチレンジイソシアネートのビュレット体184.4部、シクロヘキサノール65.6部(イソシアナト基100mol%に対して65mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-3)を得た。
ヘキサメチレンジイソシアネートのビュレット体209.8部、ヘキサノール40.2部(イソシアナト基100mol%に対して35mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら90℃で4時間反応を行い、アルコール付加イソシアネート(E-4)を得た。
ヘキサメチレンジイソシアネートのビュレット体193.9部、ボルネオール56.1部(イソシアナト基100mol%に対して35mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-5)を得た。
ヘキサメチレンジイソシアネートのビュレット体193.3部、l-メントール56.7部(イソシアナト基100mol%に対して35mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-6)を得た。
ヘキサメチレンジイソシアネートのヌレート体213.6部、シクロヘキサノール36.4部(イソシアナト基100mol%に対して35mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(E-7)を得た。
イソシアネート化合物(C1-4)237.9部、シクロヘキサノール12.1部(イソシアナト基100mol%に対して25mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、数平均分子量1580のアルコール付加イソシアネート(E-8)を得た。
イソシアネート化合物(C1-5)236.0部、シクロヘキサノール14.0部(イソシアナト基100mol%に対して25mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、数平均分子量1700のアルコール付加イソシアネート(E-9)を得た。
ヘキサメチレンジイソシアネートのビュレット体231.0部、シクロヘキサノール19.0部(イソシアナト基100mol%に対して15mol%分)を反応容器に仕込み、窒素ガス気流下で攪拌しながら110℃で4時間反応を行い、アルコール付加イソシアネート(F)を得た。
(合成例9)ポリオール(B1-1)
イソフタル酸175部、アジピン酸320部、安息香酸49部、エチレングリコール76部、ネオペンチルグリコール380部を反応容器に仕込み、窒素ガス気流下で攪拌しながら150℃~240℃に加熱してエステル化反応を行った。酸価が2.1(mgKOH/g)になったところで反応温度を200℃にし、反応容器内部を徐々に減圧し、1.3kPa以下で30分反応させた後、110℃まで冷却した。その後、無水トリメリット酸5.0部を加えて110℃にて酸変性することで、ポリオール成分(B1-1)を得た。得られたポリオール(B1-1)の水酸基はすべて1級水酸基であり、数平均分子量は750、酸価は3.6、水酸基価は104であった。
イソフタル酸438部、エチレングリコール106部、ネオペンチルグリコール200部を反応容器に仕込み、窒素ガス気流下で攪拌しながら150℃~240℃に加熱してエステル化反応を行った。酸価が1.5(mgKOH/g)になったところで反応温度を200℃にし、反応容器内部を徐々に減圧し、1.3kPa以下で30分反応させた後、110℃まで冷却した。その後、無水トリメリット酸5.0部を加えて110℃にて酸変性することで、ポリオール(B1-2)を得た。得られたポリオール(B1-2)の水酸基はすべて1級水酸基であり、数平均分子量は850、酸価は5.1、水酸基価は93であった。
イソフタル酸175部、アジピン酸320部、安息香酸49部、エチレングリコール76部、ネオペンチルグリコール380部を反応容器に仕込み、窒素ガス気流下で攪拌しながら150℃~240℃に加熱してエステル化反応を行った。酸価が2.1(mgKOH/g)になったところで反応温度を200℃にし、反応容器内部を徐々に減圧し、1.3kPa以下で30分反応させた後、110℃まで冷却した。その後、無水トリメリット酸28部を加えて110℃にて酸変性することで、ポリオール(B1-3)を得た。得られたポリオール(B1-3)の水酸基はすべて1級水酸基であり、数平均分子量は750、酸価は20.1であった。水酸基価は97であった。
イソフタル酸175部、アジピン酸320部、安息香酸49部、エチレングリコール76部、ネオペンチルグリコール380部を反応容器に仕込み、窒素ガス気流下で攪拌しながら150℃~240℃に加熱してエステル化反応を行った。酸価が2.1(mgKOH/g)になったところで反応温度を200℃にし、反応容器内部を徐々に減圧し、1.3kPa以下で30分反応させた後、110℃まで冷却した。その後、無水トリメリット酸21部を加えて110℃にて酸変性することで、ポリオール(B1-4)を得た。得られたポリオール(B1-4)の水酸基はすべて1級水酸基であり、数平均分子量は750、酸価は15.0であった。水酸基価は99であった。
イソフタル酸175部、アジピン酸320部、安息香酸49部、エチレングリコール76部、ネオペンチルグリコール380部を反応容器に仕込み、窒素ガス気流下で攪拌しながら150℃~240℃に加熱してエステル化反応を行った。酸価が2.1(mgKOH/g)になったところで反応温度を200℃にし、反応容器内部を徐々に減圧し、1.3kPa以下で30分反応させた後、110℃まで冷却した。その後、無水トリメリット酸14部を加えて110℃にて酸変性することで、ポリオール(B1-5)を得た。得られたポリオール(B1-5)の水酸基はすべて1級水酸基であり、数平均分子量は750、酸価は10.2であった。水酸基価は101であった。
単官能アルコール(B2-1)~(B2-4)としては、下記を用いた。
・B2-1:ポリオキシプロピレンアルキルエーテル(製品名:ユニルーブMB-38、日油社製、理論水酸基価28mgKOH/g)
・B2-2:ひまし油系単官能アルコール(製品名:URIC H-31、伊藤製油社製、理論水酸基価187mgKOH/g)
・B2-3:ポリオキシアルキレンアルキルエーテル(製品名:ユニルーブ50MB-72、日油社製、理論水酸基価18mgKOH/g)
・B2-4:ヘキシルデカノール(製品名:リソノール16SP、高級アルコール工業社製、理論水酸基価231mgKOH/g)
表1及び表2に各接着剤組成物の組成を示す。
3官能以上のイソシアネート化合物(C1-1)~(C1-5)、アルコール付加イソシアネート(E-1)~(E-9)または(F)、ポリオール(B1-1)~(B1-5)、および任意に単官能アルコール(B2-1)~(B2-4)、および添加剤を表1及び表2に示す配合比で加熱混合し、実施例1~41、及び比較例1~4の無溶剤型接着剤組成物を調製した。
ポリエチレンテレフタレート(厚み12μm、 以下PETと記載)/アルミ箔(厚み
9μm)/未延伸ポリプロピレン(厚み70μm、以下CPPと記載)の複合フィルムを下記の方法で作成した。
接着剤組成物について、70℃で均一混合40分後の粘度を測定し、以下の基準で判定した。その結果を表1に示す。
B:粘度が8,000mPa・s未満。
C:粘度が8,000mPa・s以上、12,000mPa・s未満。
D:粘度が12,000mPa・s以上。
接着剤組成物について、60℃で均一混合30分後の粘度を測定し、以下の基準で判定した。その結果を表1に示す。
A:粘度が10,000mPa・s未満。
B:粘度が10,000mPa・s以上、12,000mPa・s未満。
C:粘度が12,000mPa・s以上、15,000mPa・s未満。
D:粘度が15,000mPa・s以上。
上記方法にて作成したラミネート複合フィルムを15mm幅に切り取り、25℃、相対湿度50%の環境下で、剥離速度300mm/分の剥離速度で引張り、CPP/アルミ箔間のT字剥離強度(N/15mm)を測定した。
上記方法にて作成したラミネート複合フィルムについて、14cm×18cmの大きさの袋を、CPPが内側になるように190℃、1秒のヒートシール条件で作製した。内容物には、3%酢酸水溶液/ケチャップ/サラダ油を、1/1/1の重量比で混合したものを充填した。この袋を、回転式レトルト試験器を用い、30rpm、135℃、30分の加圧条件下で熱水殺菌を行った後、上記接着力測定と同様の方法でCPP/アルミ箔間のT字剥離強度(N/15mm)を測定した(「加熱殺菌後接着力[1]」と表記する)。また、55℃の環境下で4週間保存した袋については、外観の変化についても目視で観察し、耐内容物性を以下の基準で判定した(「耐内容物性[1]」と表記する)。その結果を表に示す。
B:ゆず肌状の模様や小さな斑点状の模様がなく、接着剤層が均一である(良好)。
C:ゆず肌状の模様や小さな斑点状の模様が多少観測される(使用可)。
D:ゆず肌状の模様や小さな斑点状の模様が多数観測される(使用不可)。
内容物を3%酢酸水溶液に変更した以外は、上記と同様の手順で内容物を充填した袋を作製した。この袋を、回転式レトルト試験器を用い、30rpm、135℃、30分の加圧条件下で熱水殺菌を行った後、上記接着力測定と同様の方法でCPP/アルミ箔間のT字剥離強度(N/15mm)を測定した(「加熱殺菌後接着力[2]」と表記する)。また、55℃の環境下で4週間保存した袋については、外観の変化について目視で観察し、耐内容物性を以下の基準で判定した(「耐内容物性[2]」と表記する)。その結果を表に示す。
A:ゆず肌状の模様や小さな斑点状の模様がなく、接着剤層が均一である(非常に良好)。
B:ゆず肌状の模様や小さな斑点状の模様が極僅かに観測される(良好)。
C:ゆず肌状の模様や小さな斑点状の模様が多少観測される(使用可)。
D:ゆず肌状の模様や小さな斑点状の模様が多数観測される(使用不可)。
Claims (13)
- 3官能以上のイソシアネート化合物(C2)と単官能アルコール(D)とを、当量比 3官能以上のイソシアネート化合物(C2)中のイソシアナト基:単官能アルコール(D)=100mol%:25~65mol%で反応させることにより、アルコール付加イソシアネート(E)を得るステップと;
3官能以上のイソシアネート化合物(C1)およびアルコール付加イソシアネート(E)を含むポリイソシアネート(A)と、酸価が0.5~30mgKOH/gであるアルコール(B)とを、ポリイソシアネート(A)中のイソシアナト基と、アルコール(B)中の水酸基との当量比(イソシアナト基/水酸基)が0.7~2.5であるように混合するステップ
とを含む、接着剤組成物の製造方法。 - アルコール付加イソシアネート(E)が、ポリイソシアネート(A)100重量%中に、20~80重量%含まれる、請求項1記載の接着剤組成物の製造方法。
- 3官能以上のイソシアネート化合物(C1)が、脂肪族ジイソシアネート、芳香脂肪族ジイソシアネート、および脂環族ジイソシアネートからなる群より選択される少なくとも1種のジイソシアネート化合物の3量体である、請求項1または2記載の接着剤組成物の製造方法。
- 3官能以上のイソシアネート化合物(C2)が、脂肪族ジイソシアネート、芳香脂肪族ジイソシアネート、および脂環族ジイソシアネートからなる群より選択される少なくとも1種のジイソシアネート化合物の3量体である、請求項1~3いずれか1項に記載の接着剤組成物の製造方法。
- 単官能アルコール(D)が、脂環族アルコール(D1)である、請求項1~4いずれか1項に記載の接着剤組成物の製造方法。
- アルコール(B)が、酸価が1~15mgKOH/gであるポリオール(B1)を含む、請求項1~5いずれか1項に記載の接着剤組成物の製造方法。
- ポリオール(B1)中の水酸基の全量100mol%中、70mol%以上が1級水酸基である、請求項6記載の接着剤組成物の製造方法。
- アルコール(B)が、酸価が15~40mgKOH/gであるポリオール(B1)と、単官能アルコール(B2)とを含み、アルコール(B)100重量%中の前記単官能アルコール(B2)の含有量が50重量%以下である、請求項1~6いずれか1項に記載の接着剤組成物の製造方法。
- 前記接着剤組成物が、下記式1の関係を満足する、請求項7記載の接着剤組成物の製造方法。
(1)Xa/56.1×Xc-Yh/56.1×Yc≦0.26
(式中、
Xaはポリオール(B1)の酸価(mgKOH/g)、
Xcはポリオール(B1)と単官能アルコール(B2)との合計重量中のポリオール(B1)の重量比、
Yhは単官能アルコール(B2)の水酸基価(mgKOH/g)、
Ycはポリオール(B1)と単官能アルコール(B2)との合計重量中の単官能アルコール(B2)の重量比である。) - 単官能アルコール(B2)の分子量が100以上6000以下である、請求項7または8記載の接着剤組成物の製造方法。
- 前記接着剤組成物が無溶剤型である、請求項1~10いずれか1項に記載の接着剤組成物の製造方法。
- 金属箔を含むラミネート複合フィルム用である、請求項1~11いずれか1項に記載の接着剤組成物の製造方法。
- 少なくとも2つのシート状基材を、請求項1~12いずれか1項に記載の接着剤組成物の製造方法により得られる接着剤組成物を用いて積層させるステップを含む、積層体の製造方法。
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