WO2015046049A1 - 積層フィルム - Google Patents
積層フィルム Download PDFInfo
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- WO2015046049A1 WO2015046049A1 PCT/JP2014/074831 JP2014074831W WO2015046049A1 WO 2015046049 A1 WO2015046049 A1 WO 2015046049A1 JP 2014074831 W JP2014074831 W JP 2014074831W WO 2015046049 A1 WO2015046049 A1 WO 2015046049A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/445—Block-or graft-polymers containing polysiloxane sequences containing polyester sequences
- C08G77/448—Block-or graft-polymers containing polysiloxane sequences containing polyester sequences containing polycarbonate sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a laminated film excellent in design and high-speed deformation resistance, in addition to the compatibility of molding followability and scratch resistance required for molding materials.
- a surface hardness layer is provided in order to prevent scratches during molding and to prevent scratches in the process of using the article after molding.
- the surface hardened layer has insufficient elongation to follow the forming, cracks are generated during forming, and in an extreme case, the film is broken or the surface hardened layer is peeled off. Therefore, generally, means such as forming a surface hardness layer after molding, or molding in a semi-cured state, and then completely curing by heating, actinic ray irradiation or the like is applied.
- the molded article is processed three-dimensionally, it is very difficult to provide a surface hardened layer by post-processing.
- the molding material is not only suitable for the protection function of the article, but it is not only damaged by degrading the quality due to the momentary load such as hitting various places, but also deteriorating the quality.
- electronic devices that are operated by hand such as smartphones, touch panels, keyboards, and remote controls for TVs and air conditioners, have been increasing. There is a problem that the surface of the material is scratched by hitting the furniture or hitting the enclosed item when put in a pocket or bag of clothing.
- aromatic polycarbonate resin component A
- component B liquid crystal polyester resin
- a polycarbonate resin composition characterized in that the average particle size of dispersed particles is in the range of 0.4 to 5 ⁇ m has been proposed. Further, in Patent Document 4, “0.1 to 15 parts by mass of a polymer (B) containing 50% by mass or more of an aromatic (meth) acrylate unit with respect to 100 parts by mass of the polycarbonate (A), and a methyl methacrylate unit. Is a thermoplastic resin composition obtained by blending 5 to 70 parts by mass of a polymer (C) having a mass average molecular weight of 5,000 to 20,000.
- Patent Document 1 and Patent Document 2 proposed as the above-mentioned self-healing materials
- the present inventors have confirmed that although they have excellent self-healing properties, they have a problem of insufficient high-speed deformation resistance. .
- Patent Document 3 and Patent Document 4 described above are excellent in high-speed deformation resistance, but these materials do not exhibit moldability or self-repairability, and Combining the material of the invention with the techniques of Patent Documents 1 and 2 described above makes it impossible to achieve both high-speed deformation resistance, self-repairability, moldability, and designability.
- the problem to be solved by the present invention is to provide a laminated film having both formability, self-repairability, designability and high-speed deformation resistance.
- the present invention is as follows.
- Condition 1 In the load-unloading test method using a micro hardness tester under conditions of a maximum load of 0.5 mN and a holding time of 10 seconds, the maximum displacement amount in the thickness direction of the surface layer is 1.50 ⁇ m or more, and the surface The residual displacement in the thickness direction of the layer is 1.30 ⁇ m or less;
- Condition 2 In the rigid pendulum test method, the relative storage elastic modulus at 100 ° C. of the surface layer is higher than the relative storage elastic modulus at 25 ° C. of the surface layer;
- Condition 3 The crack elongation at 150 ° C. of the surface layer in the tensile test method is 50% or more.
- 2 is a stress-strain curve obtained by a tensile test method.
- Patent Document 3 and Patent Document 4 exhibit high impact resistance because of the high crosslink density of the material surface and are hard, but do not exhibit self-repairability and designability. Furthermore, even if the materials of Patent Documents 3 and 4 are combined with the materials of Patent Documents 1 and 2, self-repairability, moldability, and high-speed deformation resistance are in a trade-off relationship, and thus cannot be compatible.
- Condition 1 In a load-unloading test method using a microhardness meter under conditions of a maximum load of 0.5 mN and a holding time of 10 seconds, the maximum displacement amount in the thickness direction of the surface layer is 1.50 ⁇ m or more. The residual displacement in the thickness direction is 1.30 ⁇ m or less.
- Condition 2 In the rigid pendulum test method, the relative storage elastic modulus at 100 ° C. of the surface layer is higher than the relative storage elastic modulus at 25 ° C. of the surface layer.
- Condition 3 The crack elongation at 150 ° C. of the surface layer in the tensile test method is 50% or more.
- the inventors pay attention to the viscoelastic behavior of the surface layer of the laminated film, and it is possible to form a certain combination of the displacement amount with respect to the load of the surface layer and the displacement amount after the load release, the moldability, the self-repairability, the design It was found to be effective in improving the resistance and high-speed deformation resistance.
- the load-unloading test method using a micro hardness tester paying attention to the maximum displacement amount in the thickness direction of the surface layer when a load is applied and the residual displacement amount after releasing the load, It has been found that it is preferable to set the parameters in a specific range.
- the measurement by the load-unloading test method is performed by pushing a diamond regular triangular pyramid indenter (inter-ridge angle 115 °) from the surface layer side of the laminated film using a dynamic ultra-micro hardness tester.
- a stress-displacement curve is obtained from the relationship between the displacement amount 1 ( ⁇ m) in the thickness direction and the load 2 (mN) obtained by the load-unloading test method.
- FIG. 1 shows an example of a stress-displacement curve obtained by the load-unloading test method.
- a load is applied and the indenter is pushed into the surface layer (weighting step 6).
- the load is held for 10 seconds (holding step 7).
- the load is unloaded (unloading step 8).
- the maximum amount of displacement in the thickness direction from when the load is applied until the unloading is the maximum amount of displacement 3
- the amount of displacement between the holding steps 7 is the creep amount of displacement 4
- the amount of displacement after complete unloading is The residual displacement amount was 5.
- a detailed measurement method will be described later.
- the maximum displacement in the thickness direction of the surface layer is 1.50 ⁇ m or more, preferably 1.80 ⁇ m or more, and particularly preferably 2.00 ⁇ m or more.
- the maximum displacement amount represents the magnitude of the displacement amount under load, and the maximum displacement amount represents the high formability, self-repairability, and design.
- the maximum amount of displacement in the thickness direction of the surface layer is preferably as large as possible, but if it is too large, the self-repairability may be incomplete, so the upper limit is 3.00 ⁇ m. It is thought to be about.
- the maximum displacement in the thickness direction of the surface layer is smaller than 1.50 ⁇ m, the moldability may be lowered.
- the residual displacement is 1.30 ⁇ m or less from the viewpoints of moldability, self-repairability, and design.
- the residual displacement amount represents the displacement amount remaining after unloading, and the small residual displacement amount represents the property of recovering the displacement, that is, the high self-repairing property. From the viewpoint of the self-healing property of the surface layer, the smaller the residual displacement, the better. However, since the self-healing material generally undergoes plastic deformation, the lower limit of the residual displacement is about 0.20 ⁇ m in this measurement method. Conceivable. On the other hand, if the residual displacement amount in the thickness direction of the surface layer is greater than 1.30 ⁇ m, visible scratches may remain after the surface layer self-repairs and the appearance may deteriorate.
- the present inventors also paid attention to the temperature dependence of the viscoelastic behavior of the surface layer with respect to the self-healing property of the surface layer of the laminated film, and in a material having a higher storage elastic modulus at a higher temperature than the storage elastic modulus at room temperature. , Discovered that self-repairability is improved.
- the laminated film of the present invention is suitably used as a molding material for smartphones and the like, and thus heat generated by various electronic devices such as smartphones is radiated from the housing surface.
- the surface temperature rises, the temperature of the self-healing material also rises and the scratches generated at room temperature are repaired, so that self-repairability is expected to be improved.
- the relative storage elastic modulus at 100 ° C. of the surface layer is higher than the relative storage elastic modulus at 25 ° C. of the surface layer. is necessary. A detailed measurement method will be described later.
- the crack elongation at 150 ° C. of the surface layer in the tensile test method is 50% or more, preferably 80% or more, and more preferably 100% or more.
- the crack elongation represents the following property at the time of molding, and the magnitude of the crack elongation represents the high moldability.
- the moldability is improved.
- the higher the crack elongation at 150 ° C. the better.
- the upper limit value is considered to be about 300%.
- the crack elongation at 150 ° C. is smaller than 50%, the surface layer is cracked during molding processing, resulting in poor molding, and the moldability may be reduced.
- the laminated film preferably satisfies the following conditions 4 and 5.
- Condition 4 The elongation at break of the surface layer at 25 ° C. in the tensile test method is 150% or more.
- Condition 5 The elastic recovery rate at 25 ° C. of the surface layer in the tensile test method with a deformation amount of 150% is 70% or more.
- the surface layer of the laminated film is peeled off from the supporting substrate to obtain a measurement sample, and a tensile test is performed using a tensile tester.
- a tensile test method at a tensile speed of 50 mm / min and a measurement temperature of 25 ° C.
- the elongation at which the test piece breaks is defined as the breaking elongation.
- a tensile test method at a tensile speed of 50 mm / min and a measurement temperature of 25 ° C., the sample is stretched to a strain of 150%, and then the tensile load on the sample is released.
- FIG. 2 shows an example of a stress-strain curve obtained by the tensile test method.
- a stress-strain curve 13 was plotted with the x-axis representing a strain of 9 (%) and the y-axis representing a stress of 10 (MPa).
- the elongation at break of the test piece is the breaking elongation 11 (%), and the shaded portion 12 represents the breaking energy.
- the breaking elongation at 25 ° C. of the surface layer in the tensile test method is preferably 150% or more, more preferably 180% or more, and further preferably 200% or more.
- the breaking elongation represents the limit elongation at which the material is broken, and the magnitude of the breaking elongation represents the high scratch resistance and formability of the material.
- the elongation at break When the elongation at break is large, the destruction of the surface layer is suppressed when scratches occur or during deformation during molding, and self-repairability and moldability are improved.
- the elongation at break is less than 150%, the surface layer may be destroyed when scratches occur or during deformation during molding, and self-repairability and moldability may be reduced.
- Examples of the method for setting the breaking elongation at 25 ° C. of the surface layer to 150% or more in the tensile test method include a method in which the resin contained in the surface layer is a specific resin.
- the elastic recovery rate at 25 ° C. of the surface layer in the tensile test method with a deformation amount of 150% is preferably 70% or more, more preferably 80% or more, and further preferably 90% or more.
- the elastic recovery rate represents how much the dimension of the surface layer changes before and after the tensile test, and the magnitude of the elastic recovery rate is how much the surface layer can return to its original shape after deformation, Means.
- the elastic recovery rate When the elastic recovery rate is high, the material recovers when the scratches are generated or when the material is deformed during molding, so that the deformation is recovered and the self-repairing property is improved. The higher the elastic recovery rate, the better. The upper limit is 100%. On the other hand, when the elastic recovery rate is less than 70%, when the scratches are generated or the material is deformed at the time of molding, the material remains unrecovered and the self-healing property may be deteriorated.
- Examples of a method for setting the elastic recovery rate at 25 ° C. of the surface layer to 70% or more in the tensile test method with a deformation amount of 150% include a method in which the resin contained in the surface layer is a specific resin.
- the present inventors paid attention to the stress-deformation behavior generated at the interface between the surface layer and the supporting substrate when a momentary load such as molding or impact is applied.
- a momentary load such as molding or impact
- a local adhesion failure occurs at the interface between the surface layer and the support base material under an instantaneous load, and this is a cause of reducing high-speed deformation resistance. Therefore, a method for preventing adhesion fracture at the interface between the surface layer and the supporting substrate was examined, and it was found that selection of a supporting substrate having a surface with a certain affinity with a solvent or more was effective.
- the support base material preferably satisfies the following condition 6.
- Condition 6 The swelling index of the supporting substrate is 0.01 or more. A method for measuring the swelling index will be described later.
- the swelling index of the supporting substrate is preferably 0.01 or more, more preferably 0.05 or more, and further preferably 0.10 or more.
- the swelling index represents the affinity with the solvent and the coating composition, and the magnitude of the swelling index is high adhesion between the supporting substrate and the surface layer, that is, high moldability and high-speed deformation resistance. Represents.
- the swelling index of the supporting substrate When the swelling index of the supporting substrate is large, the adhesion between the surface layer and the supporting substrate is improved, so that the moldability and the high-speed deformation resistance are improved. A larger swelling index is more preferable, but if it is too large, the support base material is destroyed when the surface layer is formed, so the upper limit is considered to be about 10. On the other hand, when the swelling index is less than 0.01, the interface between the surface layer and the supporting substrate is destroyed when a momentary load such as deformation or impact is applied in molding, and the moldability and high-speed deformation resistance are reduced. May decrease.
- the present inventors have focused on the mechanical properties under high-speed deformation conditions and found that suppressing the plastic deformation of the surface layer is effective in improving the high-speed deformation resistance. Therefore, when a method for suppressing plastic deformation of the surface layer was studied, it was found that the stress-strain curve in the surface layer tensile test method preferably has a specific condition.
- the first condition is that there is no yield point in the stress-strain curve. Since the yield point generally indicates the starting point of plastic deformation, if there is no yield point, plastic deformation of the material can be prevented.
- Reference numeral 13 in FIG. 2 represents a stress-strain curve.
- the second condition is that the integrated area drawn by the x-axis and the curve has a certain value or more in the stress-strain curve in which the x-axis is the strain amount and the y-axis is the stress.
- This integrated area represents the energy required to destroy the material per unit volume (hereinafter referred to as fracture energy).
- 12 shaded area represents the fracture energy.
- the laminated film preferably satisfies the following conditions 7 and 8.
- Condition 7 No yield point exists in the stress-strain curve of the surface layer in the tensile test method.
- Condition 8 The fracture energy per unit volume of the surface layer in the tensile test method is 500 MPa or more. The tensile test method and the measurement method of fracture energy will be described later.
- the high-speed deformation resistance is improved because the surface layer is prevented from being destroyed when an instantaneous load such as an impact is applied.
- the high-speed deformation resistance may deteriorate.
- Examples of the method for preventing the yield point from being present in the stress-strain curve of the surface layer in the tensile test method include a method in which the resin contained in the surface layer is a specific resin.
- the fracture energy per unit volume of the surface layer in the tensile test method is preferably 500 MPa or more, more preferably 750 MPa or more, and further preferably 1,000 MPa or more.
- Fracture energy represents the difficulty of breaking the material, and the magnitude of the fracture energy represents scratch resistance and high-speed deformation resistance.
- the surface layer can be prevented from breaking when an instantaneous load such as an impact is applied, so that high-speed deformation resistance is improved.
- the higher the fracture energy the better.
- the self-healing material has a limit because it has a crosslinked network, and the upper limit is considered to be about 5,000 MPa.
- the fracture energy is less than 500 MPa, the surface layer may be broken when an instantaneous load such as impact is applied, and the high-speed deformation resistance may be reduced.
- Examples of the method for setting the fracture energy per unit volume of the surface layer in the tensile test method to 500 MPa or more include a method in which the resin contained in the surface layer is a specific resin.
- the present inventors pay attention to the polymer structure of the surface layer of the laminated film, and control the abundance of non-crosslinked components (hereinafter referred to as extractable components) among all the components contained in the surface layer.
- extractable components In the self-healing material, the self-healing property itself is caused by the cross-linked component, but when a certain amount of extractable component is present, the flexibility of the surface layer can be improved.
- the reason is that the extractable component is not cross-linked and can move freely in the surface.
- the extractable component freely moves to create a void, and the crosslinkable component moves to the void to widen the deformable range. As a result, the entire surface layer can be deformed. improves. Therefore, the flexibility of the surface layer is improved, and self-repairability and moldability can be improved.
- the laminated film preferably satisfies the following conditions 9 and 10.
- Condition 9 The resin contained in the surface layer includes the following (1) to (3). (1) Polycarbonate segment (2) Urethane bond (3) Polysiloxane segment of formula 3 and / or polydimethylsiloxane segment
- Condition 10 The amount of chloroform dissolved in the surface layer is 3% by mass or more and 20% by mass or less.
- the resin includes a range from a polymer to an oligomer. A method for measuring the amount of dissolved chloroform will be described later.
- Polycarbonate segment refers to the segment represented by Chemical Formula 1
- Urethane bond refers to the bond represented by Chemical Formula 2
- Polysiloxane segment refers to the segment represented by Chemical Formula 3
- Polydimethylsiloxane Segment Indicates a segment represented by Formula 4. Details of these will be described later.
- R 1 is an alkylene group or cycloalkylene group having 1 to 8 carbon atoms, and n 1 is an integer of 2 to 16.
- R 2 and R 3 are each OH and an alkyl group having 1 to 8 carbon atoms.
- the polysiloxane segment has at least one or more OH and alkyl groups.
- n 2 is an integer of 100 to 300.
- n 1 is an integer of 10 to 300.
- the resin contained in the surface layer has (1) a polycarbonate segment because the self-healing property of the obtained surface layer can be improved.
- the resin contained in the surface layer has (2) a urethane bond
- the resin contained in the surface layer has (3) a polysiloxane segment and / or a polydimethylsiloxane segment of the chemical formula 3, the heat resistance and weather resistance of the resulting surface layer are improved, and the surface layer is lubricated by scratch resistance. It is possible to improve the properties.
- One resin included in the surface layer may include all of the segments (1) to (3), or a plurality of resins including any of the segments (1) to (3) may be the surface layer. May be included.
- the amount of chloroform dissolved in the surface layer is preferably 3% by mass or more and 20% by mass or less, more preferably 4% by mass or more and 20% by mass or less, and more preferably 5% by mass or more and 20% by mass or less. Further preferred.
- the above-mentioned effects improve the flexibility of the coating film, and improve self-repairability and moldability.
- the upper limit is preferably about 20% by mass.
- the amount of chloroform dissolved is less than 3% by mass, the flexibility of the coating film is lowered, and thus the self-repairability and moldability may be lowered.
- the present inventors pay attention to the layer structure of the laminated film, introduce an intermediate layer between the surface layer and the support substrate, and that the intermediate layer and the surface layer are in contact with the support substrate in this order.
- the present inventors have found that it is effective in improving self-repairability, moldability, and high-speed deformation resistance.
- a cross-sectional view of the laminated film representing this embodiment is shown in FIG. That is, it is preferable that the intermediate layer 15 is laminated in contact with the support base material 16 and the surface layer 14 is laminated in contact with the intermediate layer 15.
- the supporting base material is plastically deformed and the deformation is fixed, but the surface layer is deformed within the elastic deformation range. Therefore, the surface layer is pulled by the supporting method by the supporting base material, and residual stress is generated in the surface layer.
- the surface layer is an entropy elastic body, so the elastic modulus is higher than that at the time of molding, If the elongation of is large, the fracture limit may be reached and cracks may occur.
- the residual stress generated in the above-mentioned surface layer can be relieved, and cracking of the surface layer occurs even under load in the post-process or usage environment
- the breakage at the coating film-substrate interface can be suppressed.
- self-repairability, moldability, and high-speed deformation resistance can be improved.
- Condition 11 The glass transition temperature of the intermediate layer is 60 ° C. or higher and 130 ° C. or lower.
- the condition 11 indicates a preferable range of the glass transition temperature of the intermediate layer, and more preferably 60 ° C. or more and 100 ° C. or less.
- the glass transition temperature of the intermediate layer satisfies the above range, the residual stress generated between the surface layer and the intermediate layer and between the intermediate layer and the supporting substrate can be relieved, and self-repairability, formability, and high-speed deformation resistance can be reduced. Is preferable.
- the glass transition temperature is a value obtained from the maximum value of the temperature dispersion of the ratio (loss tangent) of the storage elastic modulus and loss elastic modulus measured by a microhardness meter. Details of the measurement method will be described later.
- the glass transition temperature of the intermediate layer When the glass transition temperature of the intermediate layer is lower than 60 ° C., the adhesion between the surface layer and the intermediate layer and between the intermediate layer and the supporting substrate is reduced, so that scratches are likely to remain due to peeling at room temperature or rubbing with a hard material. There is a case. Moreover, when the glass transition temperature of the intermediate layer is higher than 130 ° C., cracks and peeling may easily occur during molding depending on conditions.
- the intermediate layer preferably satisfies the following condition 12 from the viewpoints of self-repairability, moldability, and high-speed deformation resistance.
- Condition 12 The thickness of the intermediate layer is 0.1 ⁇ m or more and 5 ⁇ m or less.
- Condition 12 indicates a preferable range of the thickness of the intermediate layer, and more preferably 0.5 ⁇ m or more and 3 ⁇ m or less.
- the thickness of the intermediate layer satisfies the above range, the residual stress generated between the surface layer and the intermediate layer and between the intermediate layer and the supporting substrate can be relaxed, and self-repairability, moldability and high-speed deformation resistance are improved. This is preferable.
- the ability to absorb the residual stress generated between the surface layer-intermediate layer and between the intermediate layer and the supporting substrate during molding may be slightly weakened.
- the adhesion between the surface layer and the intermediate layer and between the intermediate layer and the supporting substrate is slightly weakened.
- the ultrathin film of the surface layer of the laminated film and the cross section of the intermediate layer with an ultramicrotome (Ultracut S manufactured by Leica)
- a section is prepared as a measurement sample, measured under the following conditions, and the elastic modulus is calculated using Hertz's contact theory.
- the measurement principle using an ultra-micro hardness meter will be described below.
- A is the projected area of the indentation formed by contact between the sample and the indenter
- E * is the combined elastic modulus of the indenter system and the sample system.
- the tip of the indenter when the indenter contacts the very surface of the sample, the tip of the indenter is regarded as a spherical shape, and it is considered that the Hertz contact theory relating to the contact between the spherical shape and the semi-infinite flat plate can be applied.
- the radius a of the indentation projection surface when the indenter is in contact with the sample is expressed by Equation (2).
- the projected area A of the impression formed by the contact between the sample and the indenter is expressed by Expression (3), and E * can be calculated using Expression (1) to Expression (3).
- Modulus mapping is based on the Hertz contact theory described above. An indenter is brought into contact with the very surface of the sample, the indenter is microvibrated during the test, and the response amplitude and phase difference with respect to the vibration are obtained as a function of time. System stiffness) and D (sample damping).
- Equation (4) the total force (detected load component) F (t) in the direction in which the indenter enters the sample is expressed by Equation (4).
- the first term of equation (4) is the force derived from the indenter shaft (m: mass of the indenter shaft), the second term of equation (4) is the force derived from the viscous component of the sample, and the third term of equation (4).
- m mass of the indenter shaft
- the second term of equation (4) is the force derived from the viscous component of the sample
- the third term of equation (4) Represents the rigidity of the sample system, and t represents time. Since F (t) in Expression (4) depends on time, it is expressed as Expression (5).
- ⁇ is a phase difference. Since m is known at the time of measurement, by measuring the vibration amplitude (h 0 ), phase difference ( ⁇ ), and excitation vibration amplitude (F 0 ) of the displacement when measuring the specimen, the equations (7) to (7) From (10), K and D can be calculated.
- E * is regarded as the storage elastic modulus (E ′), and the formulas (1) to (10) are summarized.
- the storage elastic modulus E ′ was calculated.
- the loss elastic modulus can also be measured in the same manner as the storage elastic modulus measurement described above.
- Ks derived from the sample is used, and the expression (12) combined with the expression (11) ) To calculate the loss elastic modulus E ′′.
- the glass transition temperature can also be measured in the same manner as the above-described storage elastic modulus, and the loss tangent (tan ⁇ ) is obtained by determining the loss tangent (tan ⁇ ) from the ratio of the storage elastic modulus and loss elastic modulus calculated by the method described above.
- the temperature of the peak value was taken as the glass transition temperature (Tg).
- the laminated film of the present invention is a laminated film on at least one of the supporting substrates, and has a surface layer that satisfies the above conditions 1 to 3.
- the laminated film may be any of a film, a sheet, and a plate as long as it is planar. Moreover, it is more preferable to have an intermediate layer between the support substrate and the surface layer.
- the surface layer has glossiness, fingerprint resistance, antireflection, antistatic, antifouling properties, electrical conductivity, heat rays. You may have other functions, such as reflection, near-infrared absorption, electromagnetic wave shielding, and easy adhesion.
- the thickness of the surface layer is not particularly limited, but is preferably 5 ⁇ m or more and 200 ⁇ m or less, more preferably 10 ⁇ m or more and 100 ⁇ m or less, and the thickness can be selected according to the other functions described above.
- the thickness of the intermediate layer is not particularly limited, but is preferably from 0.1 m to 5 ⁇ m, more preferably from 0.5 m to 3 ⁇ m, as described above.
- the resin constituting the support substrate may be either a thermoplastic resin or a thermosetting resin. Further, it may be a homopolymer, a copolymer, or a blend of two or more kinds of resins. More preferably, the resin constituting the support base material is preferably a thermoplastic resin because of good moldability.
- thermoplastic resins include polyolefin resins such as polyethylene, polypropylene, polystyrene, and polymethylpentene; alicyclic polyolefin resins, polyamide resins such as nylon 6 and nylon 66; aramid resins; polyester resins; polycarbonate resins; Polyacetal resin; polyphenylene sulfide resin; fluororesin such as tetrafluoroethylene resin, trifluoride ethylene resin, trifluoroethylene chloride resin, tetrafluoroethylene-6 fluoropropylene copolymer, vinylidene fluoride resin; acrylic A resin; a methacrylic resin; a polyacetal resin; a polyglycolic acid resin; a polylactic acid resin can be used.
- polyolefin resins such as polyethylene, polypropylene, polystyrene, and polymethylpentene
- alicyclic polyolefin resins such as nylon 6 and nylon 66
- aramid resins
- thermoplastic resin a resin having sufficient stretchability and followability is preferable.
- the thermoplastic resin is more preferably a polyester resin, a polycarbonate resin, an acrylic resin, or a methacrylic resin from the viewpoint of strength, heat resistance, and transparency.
- the polyester resin is a general term for polymers having an ester bond as a main bond chain, and is obtained by polycondensation of an acid component and its ester and a diol component.
- Specific examples include polyethylene terephthalate, polypropylene terephthalate, polyethylene-2,6-naphthalate, polybutylene terephthalate, and the like. These may be copolymerized with other dicarboxylic acids and their esters or diol components as acid components or diol components.
- polyethylene terephthalate or polyethylene-2,6-naphthalate is particularly preferable in terms of transparency, dimensional stability, heat resistance and the like.
- the support substrate may be either a single layer configuration or a laminated configuration.
- the surface of the support substrate can be subjected to various surface treatments before forming the surface layer.
- the surface treatment include chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet irradiation treatment, high frequency treatment, glow discharge treatment, active plasma treatment, laser treatment, mixed acid treatment and ozone oxidation treatment.
- glow discharge treatment, ultraviolet irradiation treatment, corona discharge treatment and flame treatment are preferred, and glow discharge treatment and ultraviolet treatment are more preferred.
- functional layers such as an easy adhesion layer, an antistatic layer, an undercoat layer, and an ultraviolet absorption layer can be provided in advance on the surface of the support substrate. It is preferable to provide a layer.
- support substrate A a support substrate having a swelling degree index of 0.01 or more
- support substrate A a support substrate having a swelling degree index of 0.01 or more
- Use of the supporting substrate A is preferable because the adhesion between the surface layer and the supporting substrate is improved as described above, and as a result, the moldability and high-speed deformation resistance are improved.
- the supporting substrate A products such as “Cosmo Shine” (registered trademark) A4300, A4100 (Toyobo Co., Ltd.), “Panlite” (registered trademark) PC-2151 (Teijin Kasei Co., Ltd.) are preferably exemplified. Can do.
- multilayer film of this invention is not specifically limited, It can obtain through the process of apply
- This coating composition can form at least the above-mentioned (1) polycarbonate segment, (2) urethane bond, (3) a resin containing a polysiloxane segment of formula 3 and / or a polydimethylsiloxane segment, or within a coating process
- the resin contained in the surface layer can have these segments and bonds by using the coating composition in the production method described later.
- the first type is a coating composition containing at least urethane (meth) acrylate A and a siloxane compound (hereinafter referred to as coating composition A). That is, the coating composition A contains the urethane segment (meth) acrylate A, which includes a polycarbonate segment and a urethane bond, which will be described later, and the siloxane compound contains a polysiloxane segment.
- (meth) acrylate” refers to acrylate and / or methacrylate.
- the coating composition A is a preferable coating composition when curing by active energy rays is used in the curing step of the coating process.
- the second type is a coating composition containing at least urethane (meth) acrylate B (hereinafter referred to as coating composition B). That is, the coating composition B contains urethane (meth) acrylate B containing a polycarbonate segment, a urethane bond, a polysiloxane segment of Formula 3 and / or a polydimethylsiloxane segment.
- the coating composition B is a preferable coating composition when curing by active energy rays is used in the curing step of the coating process.
- urethane (meth) acrylate A represents a compound containing (1) a polycarbonate segment and (2) a urethane bond.
- the urethane (meth) acrylate B represents a compound containing (1) a polycarbonate segment, (2) a urethane bond, and (3) a polysiloxane segment and / or a polydimethylsiloxane segment represented by Chemical Formula 3.
- the resin containing the polycarbonate segment preferably has at least one hydroxyl group (hydroxyl group).
- the hydroxyl group is preferably at the end of the resin containing the polycarbonate segment.
- polycarbonate diol As the resin containing a polycarbonate segment, polycarbonate diol is particularly preferable. Specifically, a polycarbonate diol represented by the chemical formula (5) is preferable.
- R 5 and R 6 are an alkylene group or a cycloalkylene group having 1 to 8 carbon atoms, and n 3 is an integer of 2 to 16.
- the polycarbonate diol may have any number of repeating carbonate units, but if the number of repeating carbonate units is too large, the strength of the cured urethane (meth) acrylate will decrease, so the number of repeating units should be 10 or less. Is preferred.
- the polycarbonate diol may be a mixture of two or more types of polycarbonate diols having different repeating numbers of carbonate units.
- the polycarbonate diol preferably has a number average molecular weight of 500 to 10,000, more preferably 1,000 to 5,000. When the number average molecular weight is less than 500, suitable flexibility may be difficult to obtain, and when the number average molecular weight exceeds 10,000, the heat resistance and solvent resistance may be deteriorated. It is.
- Polycarbonate diols include UH-CARB, UD-CARB, UC-CARB (Ube Industries Co., Ltd.), PLACEL CD-PL, PLACEL CD-H (Daicel Chemical Industries, Ltd.), Kuraray Polyol C Series (Kuraray Co., Ltd.) ) And Duranol series (Asahi Kasei Chemicals Corporation) can be suitably exemplified. These polycarbonate diols can be used alone or in combination of two or more.
- the resin containing the polycarbonate segment may contain (or copolymerize) other segments and monomers in addition to the polycarbonate segment.
- a compound containing a polysiloxane segment and / or a polydimethylsiloxane segment represented by Chemical Formula 3 described below and an isocyanate compound may be contained (or copolymerized).
- the surface layer has (1) a polycarbonate segment and (2) a urethane bond by reacting a compound containing an isocyanate group, which will be described later, with a hydroxyl group of polycarbonate diol and using it as a urethane (meth) acrylate in the coating composition.
- a compound containing an isocyanate group which will be described later
- a hydroxyl group of polycarbonate diol and using it as a urethane (meth) acrylate in the coating composition.
- the resin contained in the surface layer can have a urethane bond.
- a coating composition containing a compound containing an isocyanate group and a compound containing a hydroxyl group as a precursor when forming the surface layer a urethane bond is generated in the coating step, and the surface layer is formed.
- a urethane bond can also be contained.
- the resin contained in the surface layer has a urethane bond by reacting an isocyanate group with a hydroxyl group to form a urethane bond.
- the toughness of the surface layer can be improved and the self-repairing property can be improved.
- the compound containing an isocyanate group refers to a resin containing an isocyanate group, and a monomer or oligomer containing an isocyanate group.
- Examples of the compound containing an isocyanate group include methylene bis-4-cyclohexyl isocyanate, trimethylolpropane adduct of tolylene diisocyanate, trimethylolpropane adduct of hexamethylene diisocyanate, trimethylolpropane adduct of isophorone diisocyanate, and tolylene diisocyanate.
- Polyisocyanates such as isocyanurate bodies, isocyanurate bodies of hexamethylene diisocyanate, burette bodies of hexamethylene isocyanate, and block bodies of the above isocyanates can be mentioned.
- aliphatic isocyanates are preferred because of their high self-healing properties compared to alicyclic and aromatic isocyanates.
- the compound containing an isocyanate group is more preferably hexamethylene diisocyanate.
- the isocyanate group-containing compound is particularly preferably an isocyanate having an isocyanurate ring from the viewpoint of heat resistance, and most preferably an isocyanurate of hexamethylene diisocyanate. Isocyanates having an isocyanurate ring form a surface layer having both self-healing properties and heat resistance.
- the siloxane compound preferably includes a reactive site.
- This reactive site refers to a site that reacts with other components by external energy such as heat or light.
- Examples of such reactive sites include alkoxysilyl groups and silanol groups in which alkoxysilyl groups are hydrolyzed from the viewpoint of reactivity, carboxyl groups, hydroxyl groups, epoxy groups, vinyl groups, allyl groups, acryloyl groups, methacryloyl groups, and the like. Can be mentioned.
- vinyl groups allyl groups, alkoxysilyl groups, silyl ether groups, silanol groups, epoxy groups, acryloyl groups, and methacryloyl groups are preferred from the viewpoints of reactivity and handling properties.
- the polysiloxane segment of the chemical formula 3 and / or the polydimethylsiloxane segment is coordinated on the outermost surface side in the surface layer of the laminated film of the present invention.
- the coordination of the polysiloxane segment and / or the polydimethylsiloxane segment represented by the chemical formula 3 of the siloxane compound on the outermost surface side of the surface layer improves the lubricity of the surface layer, and thus has an effect of releasing the load.
- the self-repairability and high-speed deformation resistance of the surface layer can be improved, which is preferable.
- the (poly) siloxane segment refers to a segment represented by Chemical Formula 3 described above.
- hydrolyzable silane group-containing partial hydrolyzate, organosilica sol or a composition obtained by adding a hydrolyzable silane compound having a radical polymer to the organosilica sol as a compound having a polysiloxane segment Can do.
- Compounds having polysiloxane segments are tetraalkoxysilane, methyltrialkoxysilane, dimethyldialkoxysilane, ⁇ -glycidoxypropyltrialkoxysilane, ⁇ -glycidoxypropylalkyldialkoxysilane, ⁇ -methacryloxypropyltrialkoxy.
- the resin containing the polysiloxane segment may be copolymerized with other segments in addition to the polysiloxane segment.
- a monomer component having a polycarbonate segment and a polydimethylsiloxane segment may be copolymerized.
- a monomer having a hydroxyl group that reacts with an isocyanate group is preferably copolymerized.
- the toughness of the surface layer is improved.
- the surface using a coating composition containing a resin (copolymer) containing a polysiloxane segment having a hydroxyl group and a compound containing an isocyanate group When the layer is formed, the surface layer having a polysiloxane segment and a urethane bond can be efficiently formed.
- Polydimethylsiloxane segment As the compound having a polydimethylsiloxane segment, it is preferable to use a copolymer obtained by copolymerizing a vinyl monomer with a polydimethylsiloxane segment.
- the compound having a polydimethylsiloxane segment is a copolymer with a vinyl monomer, it may be a block copolymer, a graft copolymer, or a random copolymer.
- the compound having a polydimethylsiloxane segment is a copolymer with a vinyl monomer, this is referred to as a polydimethylsiloxane copolymer.
- a polydimethylsiloxane block copolymer as a compound having a polydimethylsiloxane segment (polydimethylsiloxane copolymer), it is produced by a living polymerization method, a polymer initiator method, a polymer chain transfer method, or the like. However, in consideration of productivity, it is preferable to use a polymer initiator method or a polymer chain transfer method.
- the compound having a polydimethylsiloxane segment is a polymer azo radical polymerization initiator represented by Chemical Formula 6.
- M 2 is an integer from 10 to 300, and n 4 is an integer from 1 to 50.
- n 4 is an integer from 1 to 50.
- a two-stage polymerization is carried out by synthesizing a prepolymer in which a peroxide group is introduced into the side chain by copolymerizing a peroxy monomer and polydimethylsiloxane having an unsaturated group at a low temperature, and then copolymerizing the prepolymer with a vinyl monomer. Can also be done.
- the compound having a polydimethylsiloxane segment is, for example, a silicone oil represented by Chemical Formula 7.
- polydimethylsiloxane graft copolymer as a compound having a polydimethylsiloxane segment (polydimethylsiloxane copolymer), for example, a compound represented by Formula 8
- M 4 is an integer from 10 to 300. That is, it can be easily obtained by copolymerizing a methacrylic ester of polydimethylsiloxane and a vinyl monomer.
- Examples of the vinyl monomer used in the copolymer with the compound having a polydimethylsiloxane segment include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, octyl acrylate, cyclohexyl acrylate, tetrahydrofurfuryl acrylate, methyl methacrylate, Ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate, lauryl methacrylate, methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, styrene, ⁇ -methyl styrene, acrylonitrile, methacrylonitrile, vinyl acetate, chloride Vinyl, vinylidene chloride, vinyl fluoride, vinylidene fluoride Glycid
- Polydimethylsiloxane copolymers include aromatic hydrocarbon solvents such as toluene and xylene, ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone, ester solvents such as ethyl acetate and butyl acetate, ethanol, isopropyl alcohol, etc. It is preferable that the alcoholic solvent is produced by a solution polymerization method alone or in a mixed solvent. Further, if necessary, a polymerization initiator such as benzoyl peroxide or azobisisobutylnitrile is used in combination. The polymerization reaction is preferably carried out at 50 to 150 ° C. for 3 to 12 hours.
- the amount of the polydimethylsiloxane segment in the polydimethylsiloxane copolymer is 1 to 30% by mass with respect to 100% by mass of all components of the polydimethylsiloxane copolymer in terms of lubricity and contamination resistance of the surface layer. Preferably there is.
- the weight average molecular weight of the polydimethylsiloxane segment is preferably 1,000 to 30,000.
- the dimethylsiloxane segment is 1 to 4% in 100% by mass of the total components of the coating composition used to form the surface layer.
- the content is 20% by mass, it is preferable in terms of self-repairing property, contamination resistance, weather resistance, and heat resistance.
- the solvent which does not participate in the reaction is not included in 100% by mass of all components of the coating composition.
- the monomer component involved in the reaction is included.
- a resin containing a polydimethylsiloxane segment is used as the coating composition used to form the surface layer
- other segments may be contained (copolymerized) in addition to the polydimethylsiloxane segment.
- a polycarbonate segment or a polysiloxane segment may be contained (copolymerized).
- the polycarbonate segment and polysiloxane are appropriately used during the synthesis of the polydimethylsiloxane copolymer.
- a method of copolymerization by adding a siloxane segment can be mentioned.
- the coating composition for the intermediate layer is a liquid that can form a material having a surface hardness higher than that of the surface layer by coating, drying and curing on the support substrate, and is a resin suitable for forming the intermediate layer. Or a precursor thereof.
- the intermediate layer coating composition is not particularly limited, but preferably contains a thermosetting resin or an ultraviolet curable resin. Either a thermosetting resin or an ultraviolet curable resin may be used, and two or more kinds of blends may be used.
- the thermosetting resin preferably includes a hydroxyl group-containing resin and a polyisocyanate compound
- examples of the hydroxyl group-containing resin include acrylic polyol, polyether polyol, polyester polyol, polyolefin polyol, polycarbonate polyol, and urethane polyol. These may be one type or a blend of two or more types. These acrylic polyols, polyether polyols, polyester polyols, polyolefin polyols, polycarbonate polyols, urethane polyols and the like preferably contain a hydroxyl group.
- the hydroxyl value of the resin containing a hydroxyl group is in the range of 1 to 200 mgKOH / g, it is preferable from the viewpoint of durability, hydrolysis resistance, and adhesion when formed into a coating film.
- the hydroxyl value is less than 1, curing of the coating film hardly proceeds, and durability and strength may decrease.
- the hydroxyl group is greater than 200, the curing shrinkage is too large, and the adhesion may be lowered.
- the acrylic polyol is obtained, for example, by polymerizing an acrylic ester or a methacrylic ester as a component.
- Such an acrylic resin can be easily prepared, for example, by copolymerizing a methacrylic acid ester as a component and a carboxylic acid group-containing monomer such as (meth) acrylic acid, itaconic acid, and maleic anhydride as necessary. Can be manufactured.
- (meth) acrylic acid esters examples include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, and tert-butyl.
- an acrylic polyol for example, DIC Corporation; (trade name “Acridic” (registered trademark) series, etc.), Taisei Fine Chemical Co., Ltd.
- polyether polyol examples include polyethylene glycol or triol, polypropylene glycol or triol, polybutylene glycol or triol, polytetramethylene glycol or triol, and addition polymers or block copolymers of these oxyalkylene compounds having different carbon numbers. Is mentioned. Examples of such polyether polyols include Asahi Glass Co., Ltd .; (trade name “Excenol” (registered trademark) series, etc.), Mitsui Chemicals Co., Ltd. (trade name “actol” (registered trademark) series, etc.). Yes, these products can be used.
- polyester polyol examples include aliphatic glycols such as ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, decanediol, and cyclohexanedimethanol, and succinic acid, adipic acid, sebacic acid, fumaric acid, and the like.
- Aliphatic polyester polyols reacted as essential raw material components with aliphatic dibasic acids such as suberic acid, azelaic acid, 1,10-decamethylenedicarboxylic acid, cyclohexanedicarboxylic acid, ethylene glycol, propylene glycol, butanediol, etc.
- An aromatic polyester polyol obtained by reacting an aliphatic glycol such as terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid or the like as an essential raw material component.
- polyester polyols examples include DIC Corporation (trade name “Polylite” (registered trademark) series, etc.), Kuraray Co., Ltd. (trade name “Kuraray polyol” (registered trademark) series, etc.), Takeda Pharmaceutical Company Limited. (Trade name “Takelac” (registered trademark) U series), and these products can be used.
- Polyolefin-based polyols include polymers and copolymers of diolefins having 4 to 12 carbon atoms such as butadiene and isoprene, and copolymers of diolefins having 4 to 12 carbon atoms and ⁇ -olefins having 2 to 22 carbon atoms.
- the polymers it is a compound containing a hydroxyl group.
- the method for containing a hydroxyl group is not particularly limited, and for example, there is a method of reacting a diene monomer with hydrogen peroxide. Furthermore, you may make it saturated aliphatic by hydrogen-bonding the remaining double bond.
- polyolefin-based polyols examples include Nippon Soda Co., Ltd. (trade name “NISSO-PB” (registered trademark) G series, etc.), Idemitsu Kosan Co., Ltd .; (trade name “Poly bd” (registered trademark) series, “ Epole "(registered trademark) series etc.), and these products can be used.
- polycarbonate polyol for example, a polycarbonate polyol obtained by using only dialkyl carbonate and 1,6-hexanediol can be used. However, in terms of lower crystallinity, as the diol, 1,6-hexanediol, It is preferable to use a polycarbonate polyol obtained by copolymerizing 1,4-butanediol, 1,5-pentanediol or 1,4-cyclohexanedimethanol.
- polycarbonate polyol Asahi Kasei Chemicals Co., Ltd., which is a copolymerized polycarbonate polyol; (trade names “T5650J”, “T5652”, “T4671”, “T4672”, etc.) "(Registered trademark) UM series, etc.)", and these products can be used.
- the urethane polyol containing a hydroxyl group is obtained, for example, by reacting a polyisocyanate compound and a compound containing at least two hydroxyl groups in one molecule at a ratio such that the hydroxyl group is excessive with respect to the isocyanate group.
- a polyisocyanate compound used in this case include hexamethylene diisocyanate, toluene diisocyanate, m-xylene diisocyanate, and isophorone diisocyanate.
- the compound containing at least two hydroxyl groups in one molecule include polyhydric alcohols, polyester diol, polyethylene glycol, polypropylene glycol, and polycarbonate diol.
- the polyisocyanate compound used for the thermosetting resin refers to a resin containing an isocyanate group, and a monomer or oligomer containing an isocyanate group.
- the compound containing an isocyanate group include methylene bis-4-cyclohexyl isocyanate, trimethylolpropane adduct of tolylene diisocyanate, trimethylolpropane adduct of hexamethylene diisocyanate, trimethylolpropane adduct of isophorone diisocyanate, and tolylene diisocyanate.
- Polyisocyanates such as isocyanurate bodies, isocyanurate bodies of hexamethylene diisocyanate, burette bodies of hexamethylene isocyanate, and block bodies of the above isocyanates can be mentioned.
- Polyisocyanate compounds used in such thermosetting resins include Mitsui Chemicals, Inc. (trade name “Takenate” (registered trademark) series, etc.), Nippon Polyurethane Industry Co., Ltd .; (trade name “Coronate” (registered trademark). ) Series), Asahi Kasei Chemicals Corporation; (trade name “Duranate” (registered trademark) series, etc.), DIC Corporation (trade name “Burnock” (registered trademark) series, etc.), etc.
- the product can be used.
- a polyfunctional acrylate monomer, an oligomer, an alkoxysilane, an alkoxysilane hydrolyzate, an alkoxysilane oligomer, a urethane acrylate oligomer, etc. are preferable, a polyfunctional acrylate monomer, an oligomer, A urethane acrylate oligomer is more preferable.
- polyfunctional acrylate monomers include polyfunctional acrylates having two or more (meth) acryloyloxy groups in one molecule and modified polymers thereof. Specific examples include pentaerythritol tri (meth) acrylate and pentaerythritol.
- Pentaerythritol triacrylate hexanemethylene diisocyanate urethane polymer and the like can be used. These monomers can be used alone or in combination of two or more.
- polyfunctional acrylic compositions include Mitsubishi Rayon Co., Ltd. (trade name “Diabeam” (registered trademark) series, etc.), Nippon Synthetic Chemical Industry Co., Ltd. (trade name “SHIKOH” (registered trademark)). ) Series), Nagase Sangyo Co., Ltd .; (trade name “Denacol” (registered trademark) series, etc.), Shin-Nakamura Chemical Co., Ltd.
- an acrylic polymer may be used to impart the above-mentioned characteristics. More preferably, the acrylic polymer contains no unsaturated groups, has a weight average molecular weight of 5,000 to 200,000, and a glass transition temperature of 20 ° C. or higher and 200 ° C. or lower. If the glass transition temperature of the acrylic polymer is less than 20 ° C., the hardness may decrease, and the elongation exceeding 200 ° C. may not be sufficient. A more preferable range of the glass transition temperature is 50 ° C. or higher and 150 ° C. or lower.
- the acrylic polymer can impart hardness by having a hydrophilic functional group.
- hydrophilic functions such as (meth) acrylic acid having a carboxyl group, itaconic acid, fumaric acid, interleic acid, etc., or 2-hydroxyethyl (meth) acrylate having a hydroxyl group, hydroxypropyl (meth) acrylate, etc.
- a hydrophilic functional group By copolymerizing an unsaturated monomer having a group with the unsaturated monomer, a hydrophilic functional group can be introduced into the acrylic polymer.
- the weight average molecular weight of the acrylic polymer is preferably 5,000 to 200,000. When the weight average molecular weight is less than 5,000, the hardness may be insufficient, and when the weight average molecular weight exceeds 200,000, the moldability and toughness including the coatability may be insufficient. There is. Further, the weight average molecular weight can be adjusted depending on the blending amount of the polymerization catalyst and the chain transfer agent and the type of solvent used.
- the content of the acrylic polymer is preferably 1% by mass or more and 50% by mass, and more preferably 5% by mass or more and 30% by mass in the total solid content of the coating composition for intermediate layer.
- the elongation is remarkably improved by setting it to 1% by mass or more, and the hardness can be maintained by setting it to 50% by mass or less, which is preferable.
- the coating composition and the intermediate layer coating composition may contain a solvent.
- the number of solvent types is preferably 1 or more and 20 or less, more preferably 1 or more and 10 or less, still more preferably 1 or more and 6 or less, and particularly preferably 1 or more and 4 or less.
- solvent refers to a substance that is liquid at room temperature and normal pressure, which can evaporate almost the entire amount in the drying step after application.
- the type of solvent is determined by the molecular structure constituting the solvent. That is, the same elemental composition and the same type and number of functional groups have different bond relationships (structural isomers), which are not structural isomers, but what conformations are in three-dimensional space Those that do not overlap exactly even if they are removed (stereoisomers) are treated as different types of solvents. For example, 2-propanol and n-propanol are handled as different solvents.
- solvent B when a plurality of solvents are included, when the solvent having the lowest relative evaporation rate (ASTM D3539-87 (2004)) based on n-butyl acetate is defined as solvent B, the relative evaporation rate of solvent B is A solvent of 0.4 or less is preferable.
- the relative evaporation rate based on the solvent n-butyl acetate is an evaporation rate measured according to ASTM D3539-87 (2004). Specifically, it is a value defined as a relative value of the evaporation rate based on the time required for 90% by mass of n-butyl acetate to evaporate under dry air.
- the relative evaporation rate of the solvent When the relative evaporation rate of the solvent is larger than 0.4, the time required for the orientation of the polysiloxane segment of the above chemical formula 3 and / or the polydimethylsiloxane segment to the outermost surface in the surface layer is shortened. In some cases, the resulting laminated film has a decrease in self-repairability and high-speed deformation resistance. Further, the lower limit of the relative evaporation rate of the solvent B is not a problem as long as it is a solvent that can be evaporated and removed from the coating film in the drying process, and may be 0.005 or more in a general coating process.
- isobutyl ketone (relative evaporation rate: 0.2), isophorone (relative evaporation rate: 0.026), diethylene glycol monobutyl ether (relative evaporation rate: 0.004), diacetone alcohol (relative evaporation) Rate: 0.15), oleyl alcohol (relative evaporation rate: 0.003), ethylene glycol monoethyl ether acetate (relative evaporation rate: 0.2), nonylphenoxyethanol (relative evaporation rate: 0.25), propylene glycol mono Examples include ethyl ether (relative evaporation rate: 0.1) and cyclohexanone (relative evaporation rate: 0.32).
- the surface layer coating composition and the intermediate layer coating composition preferably contain a polymerization initiator, a curing agent, and a catalyst.
- a polymerization initiator and a catalyst are used to accelerate the curing of the surface layer.
- the polymerization initiator those capable of initiating or accelerating polymerization, condensation or crosslinking reaction by anion, cation, radical polymerization reaction or the like of components contained in the coating composition are preferable.
- polymerization initiators curing agents and catalysts
- the polymerization initiator, the curing agent, and the catalyst may be used alone, or a plurality of polymerization initiators, curing agents, and catalysts may be used simultaneously.
- an acidic catalyst or a thermal polymerization initiator may be used in combination.
- acidic catalysts include aqueous hydrochloric acid, formic acid, acetic acid and the like.
- the thermal polymerization initiator include peroxides and azo compounds.
- the photopolymerization initiator include alkylphenone compounds, sulfur-containing compounds, acylphosphine oxide compounds, amine compounds, and the like.
- the crosslinking catalyst that promotes the urethane bond formation reaction include dibutyltin dilaurate and dibutyltin diethylhexoate.
- the coating composition may include other crosslinking agents such as melamine crosslinking agents such as alkoxymethylol melamine, acid anhydride crosslinking agents such as 3-methyl-hexahydrophthalic anhydride, and amine crosslinking agents such as diethylaminopropylamine. It can also be included.
- crosslinking agents such as melamine crosslinking agents such as alkoxymethylol melamine, acid anhydride crosslinking agents such as 3-methyl-hexahydrophthalic anhydride, and amine crosslinking agents such as diethylaminopropylamine. It can also be included.
- an alkylphenone compound is preferable from the viewpoint of curability.
- the alkylphenone type compound include 1-hydroxy-cyclohexyl-phenyl-ketone, 2.2-dimethoxy-1.2-diphenylethane-1-one, 2-methyl-1- (4-methylthiophenyl)- 2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-phenyl) -1-butane, 2- (dimethylamino) -2-[(4-methylphenyl) methyl]- 1- (4-phenyl) -1-butane, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -1-butane, 2- (dimethylamino) -2-[(4-methylphenyl ) Methyl] -1- [4- (4-morpholinyl) phenyl] -1-butane, 1-cyclohexyl
- a leveling agent, an ultraviolet absorber, a lubricant, an antistatic agent and the like may be added to the coating composition as long as the effects of the present invention are not impaired.
- middle layer can contain a leveling agent, a ultraviolet absorber, a lubricant, an antistatic agent, etc.
- the leveling agent include acrylic copolymers, silicone-based and fluorine-based leveling agents.
- Specific examples of the ultraviolet absorber include benzophenone-based, benzotriazole-based, oxalic acid anilide-based, triazine-based and hindered amine-based ultraviolet absorbers.
- the antistatic agent include metal salts such as lithium salt, sodium salt, potassium salt, rubidium salt, cesium salt, magnesium salt and calcium salt.
- the surface layer formed on the surface of the laminated film of the present invention is preferably formed by applying the above-mentioned surface layer coating composition on the above-mentioned supporting substrate, drying and curing.
- the step of applying the coating composition will be referred to as an application step, the step of drying as a drying step, and the step of curing as a curing step.
- the surface layer coating composition two or more types of coating compositions may be applied sequentially or simultaneously to form a surface layer composed of two or more layers.
- the above-mentioned surface layer coating composition and intermediate layer coating composition are applied on the above-mentioned supporting substrate sequentially or simultaneously, dried and cured. It is preferable to form by this.
- the intermediate layer coating composition two or more types of coating compositions may be applied sequentially or simultaneously to form an intermediate layer composed of two or more layers.
- the laminated film preferably satisfies the following condition 13 or condition 14.
- the surface layer and / or the intermediate layer is formed by sequentially applying two or more kinds of coating compositions on a supporting substrate, drying, and curing.
- the surface layer and / or the intermediate layer is formed by simultaneously applying two or more kinds of coating compositions on a supporting substrate, drying, and curing.
- “sequentially apply” means that one type of coating composition is applied onto a supporting substrate, dried and cured, and then another coating composition is applied thereon and dried. This means that the surface layer and / or the intermediate layer is formed by curing.
- the type of coating composition to be used the magnitude or gradient of the elastic modulus on the surface layer side-supporting substrate side of the entire surface layer (the entire surface layer is defined as the total of the surface layer and the intermediate layer) It is possible to control the size of the elastic modulus of the supporting substrate and the entire surface layer.
- the type, composition, drying conditions and curing conditions of the coating composition the form of the elastic modulus distribution in the entire surface layer can be controlled stepwise or continuously.
- “apply simultaneously” means that, in the application step, two or more kinds of coating compositions are simultaneously applied on a supporting substrate, and then dried and cured.
- the method of coating the coating composition is not particularly limited, but the coating composition is dip coating, roller coating, wire bar coating, gravure coating, die coating (US Pat. No. 2,681,294), etc. It is preferable to apply to the support substrate. Further, among these coating methods, the gravure coating method or the die coating method is more preferable as the coating method.
- the method is not particularly limited, and methods such as multilayer slide die coating, multilayer slot die coating, and wet-on-wet coating can be used.
- FIG. 1 An example of a multilayer slide die coat is shown in FIG.
- a liquid film composed of two or more kinds of coating compositions is sequentially laminated using the multilayer slide die 17 and then applied onto a supporting substrate.
- FIG. 1 An example of a multilayer slot die coat is shown in FIG.
- a liquid film composed of two or more kinds of coating compositions is laminated on the supporting substrate simultaneously with application using the multilayer slot die 18.
- wet-on-wet coating An example of wet-on-wet coating is shown in FIG.
- wet-on-wet coating after a single-layer liquid film made of the coating composition discharged from the single-layer slot die 19 is formed on a supporting substrate, the liquid film is in an undried state, A liquid film made of another coating composition discharged from the single-layer slot die 19 is laminated.
- the liquid film coated on the support substrate is dried by a drying process.
- the drying step is preferably accompanied by heating of the liquid film.
- Examples of the heating method in the drying step include heat transfer drying (adherence to a high-temperature object), convection heat transfer (hot air), radiant heat transfer (infrared rays), and others (microwave, induction heating).
- heat transfer drying adherence to a high-temperature object
- convection heat transfer hot air
- radiant heat transfer infrared rays
- microwave, induction heating microwave, induction heating
- a method using convective heat transfer or radiant heat transfer is preferable because it is necessary to make the drying speed uniform in the width direction.
- the drying process of the liquid film in the drying process is generally divided into (A) constant rate drying period and (B) reduced rate drying period.
- the drying rate since the diffusion of solvent molecules into the atmosphere at the surface of the liquid film is the rate-limiting rate of drying, the drying rate is constant in this section, and the drying rate is the partial pressure of the solvent to be evaporated, wind speed, and temperature in the atmosphere.
- the film surface temperature is constant at a value determined by the hot air temperature and the partial pressure of the solvent to be evaporated in the atmosphere.
- the drying rate since the diffusion of the solvent in the liquid film is rate-limiting, the drying rate does not show a constant value in this section and continues to decrease, and is governed by the diffusion coefficient of the solvent in the liquid film, and the film surface temperature gradually increases.
- the drying rate represents the amount of solvent evaporation per unit time and unit area, and has a dimension of g ⁇ m ⁇ 2 ⁇ s ⁇ 1 .
- the drying speed is preferably 0.1 g ⁇ m ⁇ 2 ⁇ s ⁇ 1 or more and 10 g ⁇ m ⁇ 2 ⁇ s ⁇ 1 or less, preferably 0.1 g ⁇ m ⁇ 2 ⁇ s ⁇ 1 or more and 5 g ⁇ m ⁇ 2 ⁇ More preferably, it is s ⁇ 1 or less.
- the temperature is preferably 15 ° C. to 129 ° C., more preferably 50 ° C. to 129 ° C., and more preferably 50 ° C. It is particularly preferable that the temperature is from 99 to 99 ° C.
- the orientation of the polysiloxane segment and / or the polydimethylsiloxane segment of Formula 3 is performed along with the evaporation of the remaining solvent.
- the film surface temperature increase rate during the decreasing drying period is preferably 5 ° C./second or less, and more preferably 1 ° C./second or less.
- a further curing operation may be performed by irradiating heat or active energy rays.
- electron beams EB rays
- UV rays ultraviolet rays
- oxygen concentration is preferably as low as possible because oxygen inhibition can be prevented, and curing in a nitrogen atmosphere (nitrogen purge) is more preferable.
- nitrogen purge nitrogen purge
- the ultraviolet lamp used when irradiating ultraviolet rays include a discharge lamp method, a flash method, a laser method, and an electrodeless lamp method.
- the illuminance of ultraviolet rays is preferably 100 to 3,000 mW / cm 2 , more preferably 200 to 2,000 mW / cm 2 , and even more preferably 300 to 1,500 mW / cm 2 . It is preferable to perform ultraviolet irradiation under the following conditions. Ultraviolet irradiation is performed under the condition that the cumulative amount of ultraviolet light is preferably 100 to 3,000 mJ / cm 2 , more preferably 200 to 2,000 mJ / cm 2 , and even more preferably 300 to 1,500 mJ / cm 2. preferable.
- the illuminance of ultraviolet rays is the irradiation intensity received per unit area, and changes depending on the lamp output, the emission spectral efficiency, the diameter of the light emitting bulb, the design of the reflector, and the light source distance to the irradiated object.
- the illuminance does not change depending on the conveyance speed.
- the UV integrated light amount is irradiation energy received per unit area, and is the total amount of photons reaching the surface.
- the integrated light quantity is inversely proportional to the irradiation speed passing under the light source, and is proportional to the number of irradiations and the number of lamps.
- siloxane compound 1 As the siloxane compound 1, a silicon diacrylate compound (EBECRYL350 manufactured by Daicel Cytec Co., Ltd.) was used.
- siloxane compound 2 As the siloxane compound 2, a silicon hexaacrylate compound (EBECRYL1360 manufactured by Daicel Cytec Co., Ltd.) was used.
- Polydimethylsiloxane block copolymer (a) Using an apparatus similar to the synthesis of polysiloxane (a), 50 parts by mass of toluene and 50 parts by mass of methyl isobutyl ketone, 20 parts by mass of a polydimethylsiloxane polymer initiator (VPS-0501, manufactured by Wako Pure Chemical Industries, Ltd.) Parts, methyl methacrylate 30 parts by mass, butyl methacrylate 26 parts by mass, 2-hydroxyethyl methacrylate 23 parts by mass, methacrylic acid 1 part by mass and 1-thioglycerin 0.5 part by mass were reacted at 80 ° C. for 8 hours. Thus, a polydimethylsiloxane block copolymer (a) was obtained. The ratio of the block copolymer (a) in the obtained solution was 50% by mass in 100% by mass of the solution.
- Polydimethylsiloxane graft copolymer (b) Using the apparatus used for the synthesis of polysiloxane (a), 50 parts by mass of toluene and 50 parts by mass of isobutyl acetate were charged, and the temperature was raised to 110 ° C.
- This mixed monomer was added dropwise to the above mixed solution of toluene and butyl acetate over 2 hours. Then, it was made to react at 110 degreeC for 8 hours, and the polydimethylsiloxane type graft copolymer (b) which has a hydroxyl group with a solid content concentration of 50 mass% was obtained.
- the ratio of the graft copolymer (b) in the obtained solution was 50% by mass in 100% by mass of the solution.
- Acrylic polyol [Acrylic polyol 1] As the acrylic polyol 1, an acrylic polyol containing a hydroxyl group (“Takelac” (registered trademark) UA-702, manufactured by Mitsui Chemicals, Inc., solid content concentration 50 mass%, hydroxyl value: 50 mgKOH / g) was used.
- Takelac registered trademark
- UA-702 solid content concentration 50 mass%, hydroxyl value: 50 mgKOH / g
- acrylic polyol 2 As the acrylic polyol 2, an acrylic polyol containing a hydroxyl group (“Acridic” (registered trademark) A-823 manufactured by DIC Corporation, solid content concentration: 50 mass%, hydroxyl value: 30 mgKOH / g) was used.
- Isocyanate compound 1 As the isocyanate compound 1, tolylene diisocyanate (“Coronate” (registered trademark) L Nippon Polyurethane Industry Co., Ltd., solid content concentration: 75 mass%, NCO content: 13.5 mass%) was used.
- Tolylene diisocyanate (“Coronate” (registered trademark) Coronate L, Nippon Polyurethane Industry Co., Ltd., solid content concentration 75% by mass, NCO content 13.5% by mass) was used as the isocyanate compound.
- Multifunctional acrylate [Polyfunctional acrylate 1] As polyfunctional acrylate 1, urethane acrylate oligomer (“SHIKOH” (registered trademark) UV-3310B manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solid content concentration: 100 mass%) was used.
- SHIKOH registered trademark
- UV-3310B manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solid content concentration: 100 mass%) was used.
- Multifunctional acrylate 2 As the polyfunctional acrylate 2, a urethane acrylate oligomer (“SHIKOH” (registered trademark) UV-1700B manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solid content concentration: 100 mass%) was used.
- Polyfunctional acrylate 3 As the polyfunctional acrylate 3, a urethane acrylate oligomer (“SHIKOH” (registered trademark) UV-2750B manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solid content concentration: 100 mass%) was used.
- SHIKOH registered trademark
- UV-2750B manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solid content concentration: 100 mass%
- Coating composition A1 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A1 having a solid concentration of 30% by mass.
- -Urethane acrylate A1 100 mass parts-Siloxane compound 1 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition A2 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A2 having a solid content concentration of 30% by mass.
- -Urethane acrylate A1 100 mass parts-Siloxane compound 2 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("IRGACURE” (trademark) 184 BASF Japan Ltd.).
- Coating composition A3 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A3 having a solid concentration of 30% by mass.
- -Urethane acrylate A1 100 mass parts-Siloxane compound 3 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition A4 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A4 having a solid content of 30% by mass.
- -Urethane acrylate A2 100 mass parts-Siloxane compound 1 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition A5 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A5 having a solid content concentration of 30% by mass.
- -Urethane acrylate A3 100 mass parts-Siloxane compound 1 1 mass part-Photoradical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition A6 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition A6 having a solid content concentration of 30% by mass.
- -Urethane acrylate A4 100 mass parts-Siloxane compound 1 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- coating composition B1 [Coating composition B1] The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition B1 having a solid concentration of 30% by mass.
- -Urethane acrylate B1 100 mass parts-Ethylene glycol monobutyl ether 10 mass parts-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition B2 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition B2 having a solid content concentration of 30% by mass.
- -Urethane acrylate B1 100 mass parts-Siloxane compound 1 1 mass part-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition C1 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition C1 having a solid concentration of 50% by mass.
- -Urethane (meth) acrylate C1 100 mass parts-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition C2 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition C2 having a solid concentration of 50% by mass.
- -Urethane (meth) acrylate C2 100 mass parts-Radical radical polymerization initiator 1.5 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition C3 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition C3 having a solid content concentration of 50% by mass.
- -Urethane (meth) acrylate C1 50 mass parts
- Urethane (meth) acrylate C2 50 mass parts
- Photoradical polymerization initiator 1.5 mass parts (“Irgacure” (registered trademark) 184 BASF Japan Ltd.).
- Coating composition C4 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition C4 having a solid concentration of 50% by mass.
- Urethane (meth) acrylate C3 100 parts by mass
- Photoradical polymerization initiator 1.5 parts by mass (“Irgacure” (registered trademark) 184 BASF Japan Ltd.).
- coating composition D1 [Coating composition D1] The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition D1 having a solid content of 40% by mass. ⁇ Polycaprolactone triol 15 parts by mass (Placcel 308 Daicel Chemical Industries, Ltd.) ⁇ Hexamethylene diisocyanate 15 parts by mass (Takenate D-170, manufactured by Mitsui Chemicals, Inc.) -75 parts by mass of polydimethylsiloxane block copolymer (a)-10 parts by mass of polysiloxane (a).
- Coating composition D2 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition D1 having a solid content of 40% by mass.
- Coating composition X1 [Formulation of coating composition for intermediate layer]
- the following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X1 having a solid concentration of 20% by mass.
- -Acrylic polyol 1 100 parts by mass-Isocyanate compound 1 18.8 parts by mass-Polyfunctional acrylate 1 22.9 parts by mass-Acrylic polymer 1 13 parts by mass-Photo radical polymerization initiator 0.69 parts by mass (“Irgacure” (Register Trademark) 184 BASF Japan Ltd.).
- Coating composition X2 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X2 having a solid content concentration of 20% by mass.
- -Acrylic polyol 1 100 mass parts-Isocyanate compound 1 18.8 mass parts-Acrylic polymer 1 9.6 mass parts.
- Coating composition X3 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X3 having a solid content of 20% by mass.
- -Acrylic polyol 2 100 mass parts-Isocyanate compound 1 11.8 mass parts-Acrylic polymer 1 8.8 mass parts.
- Coating composition X4 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X4 having a solid content concentration of 20% by mass.
- -Acrylic polyol 1 100 parts by mass-Isocyanate compound 1 18.8 parts by mass-Polyfunctional acrylate 2 12 parts by mass-Acrylic polymer 1 11.4 parts by mass-Photoradical polymerization initiator 0.36 parts by mass ("Irgacure” (Registration Trademark) 184 BASF Japan Ltd.).
- Coating composition X5 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X5 having a solid content concentration of 20% by mass.
- -Polyfunctional acrylate 3 100 mass parts-Acrylic polymer 1 15 mass parts-Photoradical polymerization initiator 3 mass parts ("Irgacure” (trademark) 184 BASF Japan Ltd.).
- Coating composition X6 The following materials were mixed and diluted with methyl ethyl ketone to obtain a coating composition X6 having a solid content concentration of 20% by mass.
- Acrylic polyol 1 100 parts by weight Isocyanate compound 1 18.8 parts by weight Polyfunctional acrylate 2 3.6 parts by weight Acrylic polymer 1 10.1 parts by weight Photoradical polymerization initiator 0.11 parts by weight ("Irgacure” (Registered trademark) 184 BASF Japan Ltd.).
- [Supporting substrate] [Support base material A1] As the supporting substrate A1, “Cosmo Shine” (registered trademark) A4300 (thickness 125 ⁇ m, manufactured by Toyobo Co., Ltd.) was used. [Support base material A2] “Panlite” (registered trademark) PC-2151 (thickness 125 ⁇ m, manufactured by Teijin Chemicals Ltd.) was used as the supporting base material A2. [Support base material B1] As the support substrate 1, “Lumirror” (registered trademark) U48 (thickness 125 ⁇ m, manufactured by Toray Industries, Inc.) was used.
- the swelling index of the supporting substrate was calculated from the following method. First, the haze value h 1 (%) of the supporting substrate was measured. Next, methyl ethyl ketone was applied onto the supporting substrate using a bar coater (# 10) and left at a temperature of 40 ° C. for 1 minute to dry the methyl ethyl ketone. Thereafter, the support substrate haze value h 2 (%) after drying was measured. Using these two values, the swelling index was calculated from the following equation. The measurement was performed three times at different locations for each sample, and the average value was used.
- [Production method of laminated film] [Production of laminated film 1]
- the coating composition A (A1 to A6), the coating composition B (B1 to B2) and the coating composition C (C1 to C4) are dried on a supporting substrate using a slot die coater. Coating was performed by adjusting the discharge flow rate from the slot so that the thickness of the surface layer was the specified thickness.
- the conditions of the drying wind that hits the liquid film from application to drying and curing are as follows.
- Ventilation temperature and humidity Temperature: 80 ° C., Relative humidity: 1% or less
- Wind speed Application surface side: 5 m / sec
- Anti-application surface side 5 m / sec
- Air direction Application surface side: Parallel to the substrate surface
- anti-application Surface side perpendicular to the surface of the substrate
- Residence time 2 minutes
- Irradiation output 400 W / cm 2
- Integrated light quantity 120 mJ / cm 2
- Oxygen concentration 0.1% by volume.
- the coating composition D (D1 to D2) is adjusted on the support substrate to adjust the discharge flow rate from the slot so that the thickness of the surface layer after drying becomes the specified film thickness. And applied.
- the conditions of the drying wind that hits the liquid film from application to drying and curing are as follows.
- Ventilation temperature and humidity Temperature: 80 ° C., Relative humidity: 1% or less
- Wind speed Application surface side: 5 m / sec, Anti-application surface side: 5 m / sec
- Air direction Application surface side: Parallel to the substrate surface, anti-application Surface side: perpendicular to the surface of the substrate Residence time: 1 minute
- Ventilation temperature and humidity Temperature: 160 ° C., Relative humidity: 1% or less
- Wind direction Application surface side: perpendicular to substrate surface, anti-application Surface side: perpendicular to the surface of the base material Residence time: 2 minutes
- the said wind speed and temperature / humidity used the measured value by a hot-wire type
- formula anemometer Nippon Kanomax Co., Ltd. Anemo master anemometer and air volume meter MODEL6034).
- the laminated films of Examples 1 to 13 and Comparative Examples 1 to 6 were prepared by the above method.
- the production methods of the laminated film corresponding to each example and comparative example, and the film thickness of each layer are shown in Tables 2 to 4.
- the laminated films of Examples 14 to 22 were prepared by the above method.
- the production methods of the laminated film corresponding to each example and comparative example, and the film thickness of each layer are shown in Tables 2 to 4.
- Knife-shaped edge Knife-shaped edge (RBE-160 manufactured by A & D Corporation) Pendulum mass / Inertia performance ratio: 15 g / 640 g ⁇ cm (FRB-100, manufactured by A & D Corporation)
- the relative storage modulus G at a measurement temperature of 25 ° C. '25, the relative storage elastic modulus at a measuring temperature of 100 ° C. G' was 100.
- Apparatus Dynamic ultra micro hardness tester “DUH-201” (manufactured by Shimadzu Corporation)
- Working indenter Diamond regular triangular pyramid indenter (edge angle 115 °)
- Measurement mode 2 (load-unloading test method)
- Maximum load 0.5mN Holding time when the maximum load is reached: 10 seconds
- Loading speed, unloading speed 0.1422 mN / sec.
- the prepared ultrathin section was mounted on a 100 mesh Cu grid manufactured by Ohken Shoji Co., Ltd., and TEM observation was performed at an acceleration voltage of 100 kV using a Hitachi transmission electron microscope H-7100FA. The location of the layers and intermediate layers and the supporting substrate was confirmed.
- Measuring device Tribo Indenter made by Hystron Working indenter: Diamond Cubecorner indenter (curvature radius 50 nm) Measurement field of view: Approximately 30 mm square Measurement frequency: 10 Hz Measurement atmosphere: ⁇ 20 ° C. to 120 ° C., atmospheric contact load: 0.3 ⁇ N.
- the formability of the surface layer was determined according to the following criteria for the crack elongation of the surface layer, and four or more points were accepted. 10 points: The crack elongation of the surface layer is 100% or more. 7 points: The crack elongation of the surface layer is 70% or more and less than 100%. 4 points: The crack elongation of the surface layer is 50% or more and less than 70%. 1 point: The crack elongation of the surface layer is less than 50%.
- the laminated film was immersed in ethanol and left standing at 25 ° C. for 10 minutes. Thereafter, the surface layer of the laminated film was peeled off from the support substrate to obtain a measurement sample.
- Test test method The surface layer was cut into a rectangle having a length of 150 mm and a width of 10 mm in the longitudinal direction and the width direction to obtain a test piece.
- a tensile tester Orientec Tensilon UCT-100
- set the initial tensile chuck distance to 50 mm set a specific tensile speed
- Tensile tests were performed after 90 seconds of preheating. Since the tensile speed and measurement temperature differ depending on the evaluation items, describe them by item.
- the integrated area drawn by the x-axis and the stress-strain curve was calculated, and the fracture energy per unit volume was obtained.
- the laminated film of the present invention takes advantage of the moldability, self-repairability, designability, and high-speed deformation resistance, and is particularly required to have high designability in applications that are molded into various molded products by molding.
- glasses, sunglasses, cosmetic boxes, plastic molded products such as food containers, smartphone housings, touch panels, keyboards, TVs, home appliances such as remote controls for air conditioners, buildings, dashboards, car navigation / touch panels, rooms It can be suitably used for vehicle interior parts such as mirrors, and the surfaces of various printed materials.
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Abstract
Description
条件1:最大荷重0.5mN、保持時間10秒の条件における微小硬度計を用いた負荷-除荷試験法における、前記表面層の厚み方向の最大変位量が1.50μm以上、かつ、前記表面層の厚み方向の残存変位量が1.30μm以下;
条件2:剛体振り子試験法における、前記表面層の100℃における相対貯蔵弾性率が、前記表面層の25℃における相対貯蔵弾性率より高い;
条件3:引張試験法における、前記表面層の150℃におけるクラック伸度が50%以上。
まず、特許文献1および特許文献2に記載の従来技術の自己修復性材料が、成形性と耐高速変形性を両立できない理由は、従来技術が塗膜を柔軟にすることで、変形可能量を大きくすることで成形性を発現しているため、高速変形の負荷がかかる時、塗膜の変形量が過剰に大きくなり、塗膜と基材の界面に生じた剥離により材料が破壊し、耐高速変形性が十分ではないためである。また、室温条件下における成形性は有するが、高温条件下における成形性は十分ではなかった。
条件1:最大荷重0.5mN、保持時間10秒の条件における微小硬度計を用いた負荷-除荷試験法における、前記表面層の厚み方向の最大変位量が1.50μm以上、前記表面層の厚み方向の残存変位量が1.30μm以下。
条件2:剛体振り子試験法における、前記表面層の100℃における相対貯蔵弾性率が、前記表面層の25℃における相対貯蔵弾性率より高い。
条件3:引張試験法における、前記表面層の150℃におけるクラック伸度が50%以上。
条件4:引張試験法における、前記表面層の25℃における破断伸度が150%以上。
条件5:変形量150%での引張試験法における、前記表面層の25℃における弾性復元率が70%以上。
弾性復元率:z=(1-(l-50)/100)×100
引張試験法および弾性復元率の詳細な測定方法は後述する。図2に引張試験法により得られる応力-ひずみ曲線の例を表す。x軸がひずみ量9(%)、y軸が応力10(MPa)として、応力-ひずみ曲線13をプロットした。試験片が破断するときの伸度が破断伸度11(%)、斜線部12が破壊エネルギーをそれぞれ表す。
条件6:前記支持基材の膨潤度指数が0.01以上。
膨潤度指数の測定方法は後述する。
条件7:引張試験法における、前記表面層の応力-ひずみ曲線に降伏点が存在しない。
条件8:引張試験法における、前記表面層の単位体積当たりの破壊エネルギーが500MPa以上。
引張試験法および破壊エネルギーの測定方法は後述する。
条件9:前記表面層に含まれる樹脂が以下の(1)から(3)を含む。
(1)ポリカーボネートセグメント
(2)ウレタン結合
(3)化学式3のポリシロキサンセグメントおよび/またはポリジメチルシロキサンセグメント
条件10:前記表面層のクロロホルム溶解量が3質量%以上20質量%以下。
条件11:前記中間層のガラス転移温度が60℃以上130℃以下。
条件12:前記中間層の厚みが0.1μm以上5μm以下。
測定装置:Hysitron社製Tribo Indenter
使用圧子:ダイヤモンド製Cubecorner圧子(曲率半径50nm)
測定視野:約30mm角
測定周波数:200Hz
測定雰囲気:室温、大気中
接触荷重:0.3μN
以下に超微小硬度計による測定原理を説明する。
[積層フィルム]
本発明の積層フィルムは、支持基材の少なくとも一方に、積層フィルムであって、前記の条件1から条件3を満たす表面層を有する。積層フィルムは、平面状であれば、フィルム、シート、プレートのいずれであってもよい。また、支持基材と表面層の間に中間層を有するとより好ましい。
支持基材を構成する樹脂は、熱可塑性樹脂、熱硬化性樹脂のいずれでもよい。また、ホモポリマーであっても、共重合体であってもよく、2種類以上の樹脂のブレンドであってもよい。より好ましくは、支持基材を構成する樹脂としては、成形性が良好であるため、熱可塑性樹脂が好ましい。
支持基材Aとしては、“コスモシャイン”(登録商標)A4300、A4100(東洋紡株式会社)、“パンライト”(登録商標)PC-2151(帝人化成株式会社)などの製品を好適に例示することができる。
本発明の積層フィルムの製造方法は、特に限定されないが、支持基材の少なくとも一方に、塗料塑性物を塗布する工程、必要に応じて乾燥する工程および硬化する工程を経て、得ることができる。
前述のように、ウレタン(メタ)アクリレートAとは、(1)ポリカーボネートセグメント、および(2)ウレタン結合を含む化合物を表す。また、ウレタン(メタ)アクリレートBとは、(1)ポリカーボネートセグメント、(2)ウレタン結合、および(3)化学式3のポリシロキサンセグメントおよび/またはポリジメチルシロキサンセグメントを含む化合物を表す。
ポリカーボネートセグメントを含有する樹脂は、少なくとも1以上の水酸基(ヒドロキシル基)を有することが好ましい。水酸基は、ポリカーボネートセグメントを含有する樹脂の末端にあることが好ましい。
表面層を形成するために用いる塗料組成物が、市販のウレタン変性樹脂を含むことにより、表面層に含まれる樹脂はウレタン結合を有することが可能となる。また、表面層を形成する際に前駆体としてイソシアネート基を含有する化合物と水酸基とを含有する化合物を含む塗料組成物を塗布することにより、塗布工程にてウレタン結合を生成させて、表面層にウレタン結合を含有させることもできる。
シロキサン化合物は反応性部位を含むことが好ましい。この反応性部位とは、熱または光などの外部エネルギーにより他の成分と反応する部位を指す。このような反応性部位として、反応性の観点からアルコキシシリル基およびアルコキシシリル基が加水分解されたシラノール基や、カルボキシル基、水酸基、エポキシ基、ビニル基、アリル基、アクリロイル基、メタクリロイル基などが挙げられる。なかでも、反応性、ハンドリング性の観点から、ビニル基、アリル基、アルコキシシリル基、シリルエーテル基あるいはシラノール基や、エポキシ基、アクリロイル基、メタクリロイル基が好ましい。
本発明において、(ポリ)シロキサンセグメントとは、前述の化学式3で示されるセグメントを指す。
ポリジメチルシロキサンセグメントを有する化合物としては、ポリジメチルシロキサンセグメントにビニルモノマーが共重合された共重合体を用いることが好ましい。
を用いて他のビニルモノマーと共重合させることで得ることができる。
に、HS-CH2COOHやHS-CH2CH2COOH等を付加してSH基を有する化合物とした後、SH基の連鎖移動を利用して該シリコーン化合物とビニルモノマーとを共重合させることで得ることができる。
すなわちポリジメチルシロキサンのメタクリルエステルなどとビニルモノマーを共重合させることにより、容易に得ることができる。
中間層用塗料組成物は支持基材上に塗布、乾燥および硬化することにより、表面層よりも表面硬度が高くなるような材料を形成可能な液体で、中間層を形成するのに適した樹脂、またはその前駆体を含む。
前記塗料組成物および前記中間層用塗料組成物は溶媒を含んでもよい。溶媒の種類数としては1種類以上20種類以下が好ましく、より好ましくは1種類以上10種類以下、さらに好ましくは1種類以上6種類以下、特に好ましくは1種類以上4種類以下である。
また、前記表面層用塗料組成物および中間層用塗料組成物は、重合開始剤や硬化剤や触媒を含むことが好ましい。重合開始剤および触媒は、表面層の硬化を促進するために用いられる。重合開始剤としては、塗料組成物に含まれる成分をアニオン、カチオン、ラジカル重合反応等による重合、縮合または架橋反応を開始あるいは促進できるものが好ましい。
本発明の積層フィルムの表面に形成される表面層は、前述の表面層用塗料組成物を前述の支持基材上に塗布し、乾燥し、硬化することにより形成することが好ましい。以下、塗料組成物を塗布する工程を塗布工程、乾燥する工程を乾燥工程、硬化する工程を硬化工程と記述する。表面層用塗料組成物として、2種類以上の塗料組成物を逐次にまたは同時に塗布して、2層以上の層からなる表面層を形成しても良い。
〔ウレタン(メタ)アクリレートA1の合成〕
トルエン100質量部、メチル-2,6-ジイソシアネートヘキサノエート(協和発酵キリン株式会社製 LDI)50質量部およびポリカーボネートジオール(ダイセル化学工業株式会社製 プラクセルCD-210HL)119質量部を混合し、40℃にまで昇温して8時間保持した。それから、2-ヒドロキシエチルアクリレート(共栄社化学株式会社製 ライトエステルHOA)28質量部、ジペンタエリストールヘキサアクリレート(東亞合成株式会社製 M-400)5質量部、ハイドロキノンモノメチルエーテル0.02質量部を加えて70℃で30分間保持した後、ジブチル錫ラウレート0.02質量部を加えて80℃で6時間保持した。そして、最後にトルエン97質量部を加えて固形分濃度50質量%のウレタンアクリレートA1を得た。
トルエン100質量部、メチル-2,6-ジイソシアネートヘキサノエート(協和発酵キリン株式会社製 LDI)50質量部およびポリカーボネートジオール(ダイセル化学工業株式会社製 プラクセルCD-220)150質量部を混合し、40℃にまで昇温して8時間保持した。それから、2-ヒドロキシエチルアクリレート(共栄社化学株式会社製 ライトエステルHOA)28質量部、ジペンタエリストールヘキサアクリレート(東亞合成株式会社製 M-400)5質量部、ハイドロキノンモノメチルエーテル0.02質量部を加えて70℃で30分間保持した後、ジブチル錫ラウレート0.02質量部を加えて80℃で6時間保持した。そして、最後にトルエン97質量部を加えて固形分濃度50質量%のウレタンアクリレートA2を得た。
トルエン100質量部、メチル-2,6-ジイソシアネートヘキサノエート(協和発酵キリン株式会社製 LDI)50質量部およびポリカーボネートジオール(旭化成株式会社製 デュラノールT5651)110質量部を混合し、40℃にまで昇温して8時間保持した。それから、2-ヒドロキシエチルアクリレート(共栄社化学株式会社製 ライトエステルHOA)28質量部、ジペンタエリストールヘキサアクリレート(東亞合成株式会社製 M-400)5質量部、ハイドロキノンモノメチルエーテル0.02質量部を加えて70℃で30分間保持した後、ジブチル錫ラウレート0.02質量部を加えて80℃で6時間保持した。そして、最後にトルエン97質量部を加えて固形分濃度50質量%のウレタンアクリレートA3を得た。
トルエン100質量部、メチル-2,6-ジイソシアネートヘキサノエート(協和発酵キリン株式会社製 LDI)50質量部およびポリカーボネートジオール(旭化成株式会社製 デュラノールT5650E)60質量部を混合し、40℃にまで昇温して8時間保持した。それから、2-ヒドロキシエチルアクリレート(共栄社化学株式会社製 ライトエステルHOA)28質量部、ジペンタエリストールヘキサアクリレート(東亞合成株式会社製 M-400)5質量部、ハイドロキノンモノメチルエーテル0.02質量部を加えて70℃で30分間保持した後、ジブチル錫ラウレート0.02質量部を加えて80℃で6時間保持した。そして、最後にトルエン97質量部を加えて固形分濃度50質量%のウレタンアクリレートA4を得た。
〔ウレタン(メタ)アクリレートB1の合成〕
トルエン100質量部、メチル-2,6-ジイソシアネートヘキサノエート(協和発酵キリン株式会社製 LDI)50質量部およびポリカーボネートジオール(ダイセル化学工業株式会社製 プラクセルCD-210HL)110質量部、ポリジメチルシロキサン(信越化学工業株式会社製 X-22-160AS)8質量部を混合し、40℃にまで昇温して8時間保持した。それから、2-ヒドロキシエチルアクリレート(共栄社化学株式会社製 ライトエステルHOA)28質量部、ジペンタエリストールヘキサアクリレート(東亞合成株式会社製 M-400)5質量部、ハイドロキノンモノメチルエーテル0.02質量部を加えて70℃で30分間保持した後、ジブチル錫ラウレート0.02質量部を加えて80℃で6時間保持した。そして、最後にトルエン97質量部を加えて固形分濃度50質量%のウレタンアクリレートB1を得た。
〔ウレタン(メタ)アクリレートC1の合成〕
トルエン50質量部、ヘキサメチレンジイソシアネートのイソシアヌレート変性タイプ(三井化学株式会社製タケネートD-170N)50質量部、ポリカプロラクトン変性ヒドロキシエチルアクリレート(ダイセル化学工業株式会社製 プラクセルFA5)76質量部、ジブチル錫ラウレート0.02質量部、およびハイドロキノンモノメチルエーテル0.02質量部を混合し、70℃で5時間保持した。その後、トルエン79質量部を加えて固形分濃度50質量%のウレタンアクリレートC1を得た。
ヘキサメチレンジイソシアネートのイソシアヌレート変性体(三井化学株式会社製 タケネートD-170N、イソシアネート基含有量:20.9質量%)50質量部、ポリエチレングリコールモノアクリレート(日油株式会社製 ブレンマーAE-150、水酸基価:264(mgKOH/g))53質量部、ジブチルスズラウレート0.02質量部およびハイドロキノンモノメチルエーテル0.02質量部を仕込んだ。そして、70℃で5時間保持して反応を行った。反応終了後、反応液にメチルエチルケトン(以下MEKという)102質量部を加え、固形分濃度50質量%のウレタンアクリレートC2を得た。
トルエン50質量部、H6XDIヌレート(三井化学株式会社製 D-127N、NCO含有量13.5質量%)67質量部、ポリカプロラクトン変性ヒドロキシエチルアクリレート(ダイセル化学工業株式会社製 プラクセルFA5)76質量部、ジブチル錫ラウレート0.02質量部、およびハイドロキノンモノメチルエーテル0.02質量部を混合し、70℃で5時間保持した。その後、トルエン79質量部を加えて固形分濃度50質量%のウレタンアクリレートC3を得た。
〔シロキサン化合物1〕
シロキサン化合物1として、シリコンジアクリレート化合物(EBECRYL350 ダイセル・サイテック株式会社製)を使用した。
シロキサン化合物2として、シリコンヘキサアクリレート化合物(EBECRYL1360 ダイセル・サイテック株式会社製)を使用した。
攪拌機、温度計、コンデンサおよび窒素ガス導入管を備えた500ml容量のフラスコにエタノール106質量部、テトラエトキシシラン320質量部、脱イオン水21質量部、および1質量%塩酸1質量部を仕込み、85℃で2時間保持した後、昇温しながらエタノールを回収し、180℃で3時間保持した。その後、冷却し、粘調なポリシロキサン(a)を得た。
ポリシロキサン(a)の合成と同様の装置を用い、トルエン50質量部、およびメチルイソブチルケトン50質量部、ポリジメチルシロキサン系高分子重合開始剤(和光純薬株式会社製、VPS-0501)20質量部、メタクリル酸メチル30質量部、メタクリル酸ブチル26質量部、2-ヒドロキシエチルメタクリレート23質量部、メタクリル酸1質量部および1-チオグリセリン0.5質量部を仕込み、80℃で8時間反応させてポリジメチルシロキサン系ブロック共重合体(a)を得た。得られた溶液中のブロック共重合体(a)の割合は、溶液100質量%中に50質量%であった。
ポリシロキサン(a)の合成に用いた装置を用い、トルエン50質量部、酢酸イソブチル50質量部を仕込み、110℃まで昇温した。別にメタクリル酸メチル20質量部、メタクリル酸ブチル20質量部、カプロラクトンメタクリルエステル(ダイセル化学工業(株)製 プラクセルFM-5)32質量部、2-ヒドロキシエチルメタクリレート23質量部、ポリシロキサン(a)10質量部、片末端メタクリル変性ポリジメチルシロキサン(東亞合成化学工業(株)製、X-22-174DX)20質量部、およびメタクリル酸1質量部、1,1-アゾビスシクロヘキサン-1-カルボニトリル2質量部を混合した。この混合モノマーを上記のトルエン、酢酸ブチルの混合液に2時間かけて滴下した。その後、110℃で8時間反応させ、固形分濃度50質量%の水酸基を有するポリジメチルシロキサン系グラフト共重合体(b)を得た。得られた溶液中のグラフト共重合体(b)の割合は、溶液100質量%中に50質量%であった。
〔アクリルポリオール1〕
アクリルポリオール1として、水酸基を含有するアクリルポリオール(“タケラック”(登録商標)UA-702 三井化学株式会社製 固形分濃度50質量% 水酸基価:50mgKOH/g)を使用した。
アクリルポリオール2として、水酸基を含有するアクリルポリオール(“アクリディック”(登録商標)A-823 DIC株式会社製 固形分濃度50質量% 水酸基価30mgKOH/g)を使用した。
〔イソシアネート化合物1〕
イソシアネート化合物1として、トリレンジジイソシアネート(“コロネート”(登録商標)L 日本ポリウレタン工業株式会社 固形分濃度75質量% NCO含有量13.5質量%)を使用した。
〔多官能アクリレート1〕
多官能アクリレート1として、ウレタンアクリレートオリゴマー(“SHIKOH”(登録商標)UV-3310B 日本合成化学工業株式会社製、固形分濃度100質量%)を使用した。
多官能アクリレート2として、ウレタンアクリレートオリゴマー(“SHIKOH”(登録商標)UV-1700B 日本合成化学工業株式会社製、固形分濃度100質量%)を使用した。
多官能アクリレート3として、ウレタンアクリレートオリゴマー(“SHIKOH”(登録商標)UV-2750B 日本合成化学工業株式会社製、固形分濃度100質量%)を使用した。
〔アクリルポリマー1〕の合成]
ジラウロイルパーオキサイド(パーロイルL 日油株式会社製)24質量部をメチルエチルケトン495質量部に加えて70℃で30分間加温して溶解させ、メタクリル酸50質量部、ブチルアクリレート90質量部、メチルメタクリレート100質量部および4-メチル-2,4-ジフェニルペンテン-1(ノフマーMSD 日油株式会社製)2.4質量部を混合した溶液を4時間かけて滴下して撹拌重合させた。その後、さらに80℃で2時間撹拌を行い、親水性官能基を含有した固形分濃度35質量%のアクリルポリマー1のメチルエチルケトン溶液(重量平均分子量6,000)を得た。
〔塗料組成物A1〕
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A1を得た。
・ウレタンアクリレートA1 100質量部
・シロキサン化合物1 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A2を得た。
・ウレタンアクリレートA1 100質量部
・シロキサン化合物2 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A3を得た。
・ウレタンアクリレートA1 100質量部
・シロキサン化合物3 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A4を得た。
・ウレタンアクリレートA2 100質量部
・シロキサン化合物1 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A5を得た。
・ウレタンアクリレートA3 100質量部
・シロキサン化合物1 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物A6を得た。
・ウレタンアクリレートA4 100質量部
・シロキサン化合物1 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
〔塗料組成物B1〕
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物B1を得た。
・ウレタンアクリレートB1 100質量部
・エチレングリコールモノブチルエーテル 10質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度30質量%の塗料組成物B2を得た。
・ウレタンアクリレートB1 100質量部
・シロキサン化合物1 1質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
〔塗料組成物C1〕
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度50質量%の塗料組成物C1を得た。
・ウレタン(メタ)アクリレートC1 100質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度50質量%の塗料組成物C2を得た。
・ウレタン(メタ)アクリレートC2 100質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度50質量%の塗料組成物C3を得た。
・ウレタン(メタ)アクリレートC1 50質量部
・ウレタン(メタ)アクリレートC2 50質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度50質量%の塗料組成物C4を得た。
・ウレタン(メタ)アクリレートC3 100質量部
・光ラジカル重合開始剤 1.5質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
〔塗料組成物D1〕
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度40質量%の塗料組成物D1を得た。
・ポリカプロラクトントリオール 15質量部
(プラクセル308 ダイセル化学工業株式会社)
・ヘキサメチレンジイソシアネート 15質量部
(タケネートD-170 三井化学株式会社製)
・ポリジメチルシロキサン系ブロック共重合体(a) 75質量部
・ポリシロキサン(a) 10質量部。
以下の材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度40質量%の塗料組成物D1を得た。
・ポリジメチルシロキサン系グラフト共重合体(b) 100質量部
・ヘキサメチレンジイソシアネート 12質量部
(バーノックDN-950、DIC株式会社製)。
[塗料組成物X1]
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X1を得た。
・アクリルポリオール1 100質量部
・イソシアネート化合物1 18.8質量部
・多官能アクリレート1 22.9質量部
・アクリルポリマー1 13質量部
・光ラジカル重合開始剤 0.69質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X2を得た。
・アクリルポリオール1 100質量部
・イソシアネート化合物1 18.8質量部
・アクリルポリマー1 9.6質量部。
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X3を得た。
・アクリルポリオール2 100質量部
・イソシアネート化合物1 11.8質量部
・アクリルポリマー1 8.8質量部。
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X4を得た。
・アクリルポリオール1 100質量部
・イソシアネート化合物1 18.8質量部
・多官能アクリレート2 12質量部
・アクリルポリマー1 11.4質量部
・光ラジカル重合開始剤 0.36質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X5を得た。
・多官能アクリレート3 100質量部
・アクリルポリマー1 15質量部
・光ラジカル重合開始剤 3質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
下記材料を混合し、メチルエチルケトンを用いて希釈し固形分濃度20質量%の塗料組成物X6を得た。
・アクリルポリオール1 100質量部
・イソシアネート化合物1 18.8質量部
・多官能アクリレート2 3.6質量部
・アクリルポリマー1 10.1質量部
・光ラジカル重合開始剤 0.11質量部
(“イルガキュア”(登録商標)184 BASFジャパン株式会社)。
〔支持基材A1〕
支持基材A1として、“コスモシャイン”(登録商標)A4300(厚み125μm、東洋紡株式会社製)を使用した。
〔支持基材A2〕
支持基材A2として、“パンライト”(登録商標)PC-2151(厚み125μm、帝人化成株式会社製)を使用した。
〔支持基材B1〕
支持基材1として、“ルミラー”(登録商標)U48(厚み125μm、東レ株式会社製)を使用した。
支持基材の膨潤度指数は以下の方法から算出した。まず、支持基材のヘイズ値h1(%)を測定した。次に、支持基材上に、メチルエチルケトンをバーコーター(#10)を用いて塗布し、温度40℃にて1分間放置し、メチルエチルケトンを乾燥させた。その後、乾燥後の支持基材ヘイズ値h2(%)を測定した。この2つの値を用いて、以下の式から膨潤度指数を算出した。測定は各サンプルについて場所を変えて3回測定を行い、その平均値を用いた。
膨潤度指数:h=|h2-h1|
なおヘイズ値の測定は、JIS K 7136(2000)に基づき、日本電色工業株式会社製ヘイズメーターを用いて、支持基材のメチルエチルケトンを塗布した側から光を透過するよう、装置に置いて測定した。表1に得られた支持基材の評価結果をまとめた。
〔積層フィルムの作製1〕
支持基材上に、前記塗料組成物A(A1~A6)、塗料組成物B(B1~B2)および塗料組成物C(C1~C4)をスロットダイコーターによる連続塗布装置を用い、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布した。塗布から乾燥、硬化までの間に液膜にあたる乾燥風の条件は以下の通りである。
送風温湿度 : 温度:80℃、相対湿度:1%以下
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間
〔硬化工程〕
照射出力 : 400W/cm2
積算光量 : 120mJ/cm2
酸素濃度 : 0.1体積%。
支持基材上に、前記塗料組成物D(D1~D2)をスロットダイコーターによる連続塗布装置を用い、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布した。塗布から乾燥、硬化までの間に液膜にあたる乾燥風の条件は以下の通りである。
送風温湿度 : 温度:80℃、相対湿度:1%以下
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 1分間
〔硬化工程〕
送風温湿度 : 温度:160℃、相対湿度:1%以下
風速 : 塗布面側:10m/秒、反塗布面側:10m/秒
風向 : 塗布面側:基材の面に対して垂直、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間
なお、前記風速、温湿度は熱線式風速計(日本カノマックス株式会社製 アネモマスター風速・風量計 MODEL6034)による測定値を使用した。
支持基材上に中間層用塗料組成物をスロットダイコーターによる連続塗布装置を用い、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布し、次いで下記の条件で乾燥工程および硬化工程を行い、支持基材上に中間層を形成した。
送風温湿度 : 温度:80℃
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間。
積算光量 : 120mJ/cm2
酸素濃度 : 大気雰囲気
さらに、同装置を用い、上記で得られた中間層上に塗料組成物を、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布し、次いで下記の条件で乾燥工程、硬化工程を行い、積層フィルムを得た。
送風温湿度 : 温度:80℃
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間
〔硬化工程〕
積算光量 : 120mJ/cm2
酸素濃度 : 200ppm以下。
支持基材上に中間層用塗料組成物をスロットダイコーターによる連続塗布装置を用い、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布し、次いで下記の条件で乾燥工程、硬化工程を行い、支持基材上に中間層を形成した。
送風温湿度 : 温度:80℃
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間
さらに、同装置を用い、上記で得られた中間層上に塗料組成物を、乾燥後の表面層の厚みが指定の膜厚になるようにスロットからの吐出流量を調整して塗布し、次いで下記の条件で乾燥工程、硬化工程を行い、積層フィルムを得た。
送風温湿度 : 温度:80℃
風速 : 塗布面側:5m/秒、反塗布面側:5m/秒
風向 : 塗布面側:基材の面に対して平行、反塗布面側:基材の面に対して垂直
滞留時間 : 2分間。
積算光量 : 120mJ/cm2
酸素濃度 : 200ppm以下。
作製した積層フィルムについて、次に示す性能評価を実施し、得られた結果を表3、4に示す。特に断らない場合を除き、測定は各実施例・比較例において1つのサンプルについて場所を変えて3回測定を行い、その平均値を用いた。
剛体振り子の自由減衰振動法に基づき(これを剛体振り子試験法とする)、株式会社エーアンドディ社製剛体振り子型物性試験機RPT-3000を用いて、表面層の相対貯蔵弾性率を測定した。試験機は予め25℃に温調しておき、サンプルおよび振り子をセットした後、10℃/分の速度で150℃まで昇温しながら測定を行った。測定は5回ずつ行い、その平均値で評価した。なお、振り子は、以下のものを使用した。
使用エッジ:ナイフ形状エッジ(株式会社エーアンドディ社製RBE-160)
振り子質量/慣性能率:15g/640g・cm(株式会社エーアンドディ社製FRB-100)
なお、測定温度25℃における相対貯蔵弾性率をG’25、測定温度100℃における相対貯蔵弾性率をG’100とした。
積層フィルムを10mm幅×200mm長に切り出し、長手方向にチャックで把持してインストロン型引っ張り試験機(インストロン社製超精密材料試験機MODEL5848)にて引っ張り速度100mm/分で伸張した。測定温度は150℃で行った。伸張する際に、伸張中のサンプルを観察しておき、目視でクラック(亀裂)が生じたら停止する(停止するときの伸度は5の整数となるように調整する)。次から測定するサンプルは、停止時の伸度より、5%単位で伸張伸度を低くしていったサンプルを順次採取し、最終的に目視にてクラックが入らなくなる伸度まで行った。
平滑な金属板(ダイス鋼:SKD-11)に、東レ・ダウコーニング社製「ハイバキュームグリース」を1g塗布し、それに積層フィルムの支持基材側をハイバキュームグリース塗布部分に貼り付け、表面に濾紙を挟んでハンドプレス機で空気が噛まないようにプレスした。このような方法で得られた試料の表面層側から、下記の条件で、正三角錐を用いた負荷-除荷試験法による測定を行い、応力-変位曲線(図1参照)を取得した。
使用圧子:ダイヤモンド製正三角錐圧子(稜間角115°)
測定モード:2(負荷-除荷試験法)
最大荷重:0.5mN
最大荷重に達したときの保持時間:10秒
荷重速度、除荷速度:0.1422mN/秒。
A.積層フィルム断面の確認
積層フィルムをカッターで切り出し、電顕用エポキシ樹脂(日新EM社製Quetol812)で包埋し、60℃のオーブン中で48時間かけて該エポキシ樹脂を硬化させた後、ウルトラミクロトーム(ライカ社製Ultracut S)で厚さ約100nmの超薄切片を作製した。
上記、超薄切片をサンプルとし、超微小硬度計(Hysitron社製Tribo Indenter)を用いて、表面層と中間層および支持基材のモジュラスマッピング像を取得し、貯蔵弾性率、損失弾性率を算出し、貯蔵弾性率と損失弾性率の比から損失正接(tanδ)を求め、得られた損失正接(tanδ)のピーク値の温度を、ガラス転移温度(Tg)とした。
測定条件は下記に示す。
測定装置: Hysitron社製Tribo Indenter
使用圧子: ダイヤモンド製Cubecorner圧子(曲率半径50nm)
測定視野: 約30mm角
測定周波数:10Hz
測定雰囲気:-20℃~120℃・大気中
接触荷重: 0.3μN。
温度23℃で12時間放置した後、同環境にて表面層表面を、真鍮ブラシ(TRUSCO製)に以下の荷重をかけて、水平に5回引っ掻いたのち、5分間放置後の傷の回復状態を、以下の基準に則り目視で判定を行った。試験を3回行い、その平均値(小数点以下切捨て)を試験結果とし、4点以上を合格とした。
10点:荷重1kgで傷が残らない
7点: 荷重1kgでは傷が残るが、700gでは傷が残らない
4点: 荷重700gでは傷が残るが、500gでは傷が残らない
1点: 荷重500gで傷が残る。
温度23℃で12時間放置した後、同環境にて表面層表面を、真鍮ブラシ(TRUSCO製)に、500gの荷重をかけ、水平に5回引っ掻いたときの傷の回復状態を、以下の基準に則り目視で判定を行った。試験を3回行い、その平均値(小数点以下切捨て)を試験結果とし、4点以上を合格とした。
10点:表面の傷が全て回復するのに要する時間が3秒以下。
7点: 表面の傷が全て回復するのに要する時間が3秒より長く10秒以下。
4点: 表面の傷が全て回復するのに要する時間が10秒より長く30秒以下。
1点: その他(表面の傷が全て回復するのに要する時間が30秒より長くかかるか、回復しない傷が存在するか、または、傷が入らないなど)。
温度23℃で12時間放置した後、同環境にて表面層表面に対し、真鍮ブラシ(TRUSCO製)に以下の重りをのせ、高さ10cmの高さから5回落としたときの表面の状態を以下の基準に則り目視で判定を行った。試験を3回行い、その平均値(小数点以下切捨て)を試験結果とし、4点以上を合格とした。
10点:重り1kgで傷や痕が残らない。
7点: 重り1kgでは傷や痕が残るが、700gでは傷が残らない。
4点: 重り700gでは傷や痕が残るが、500gでは傷が残らない。
1点: 重り500gで傷が残る。
表面層の成形性は前記表面層のクラック伸度について、以下の基準に則り判定を行い、4点以上を合格とした。
10点:表面層のクラック伸度が100%以上。
7点: 表面層のクラック伸度が70%以上100%未満。
4点: 表面層のクラック伸度が50%以上70%未満。
1点: 表面層のクラック伸度が50%未満。
各値および評価に必要な値は、以下の引張試験法により取得した。
各値および評価に必要な値は、以下の引張試験法により取得した。なお、前述の表面層の剥離により、サンプルを採取した。
表面層を長手方向および幅方向に長さ150mm×幅10mmの矩形に切り出し、試験片とした。引張試験機(オリエンテック製テンシロンUCT-100)を用いて、初期引張チャック間距離50mmとし、特定の引張速度を設定し、予め特定の測定温度に設定した恒温層中に試験片をセットし、90秒間の予熱の後で引張試験を行った。引張速度と測定温度は評価項目により異なるため、項目別に記述する。
ひずみ量:x=((a-50)/50)×100
応力:y=b/(k×10)。
引張速度50mm/分、測定温度25℃における引張試験法において、試験片が破断するときの伸度を破断伸度とした。測定は各サンプル5回ずつ行い、その平均値で評価を行った。
引張速度50mm/分、測定温度25℃における引張試験法において、ひずみ量150%までサンプルを伸張後、サンプルへの引張荷重を解放した。(これを、変形量150%での引張試験法とする。)
測定前に初期試長として印をつけていた距離を測定しlmmとして、以下の式から、弾性復元率z%を算出した。
弾性復元率:z=(1-(l-50)/100)×100
なお、前述の測定条件では、破断伸度150%に満たないサンプルは破断するため、弾性復元率は測定できなかった。
引張速度50mm/分、測定温度25℃における引張試験法において、応力-ひずみ曲線を取得した。測定は各サンプル5回ずつ行い、その平均値で評価を行った。
条件式:ya≦yb
ただし、xa≦xbであり、xaは0%より大きく、xbは破断伸度より小さい。
引張速度50mm/分、測定温度25℃における引張試験法において、応力-ひずみ曲線を取得した。測定は各サンプル5回ずつ行い、その平均値で評価を行った。
各値および評価に必要な値は、以下の引張試験法により取得した。
クロロホルム溶解量:g=(g1-g2)/g1
表3、表4に最終的に得られた積層フィルムの評価結果をまとめた。
2 荷重 P(mN)
3 最大変位量
4 クリープ変位量
5 残存変位量
6 加重工程
7 保持工程
8 除荷工程
9 ひずみ量(%)
10 応力(MPa)
11 破断伸度(%)
12 破壊エネルギー(MPa)
13 応力-ひずみ曲線
14 表面層
15 中間層
16 支持基材
17 多層スライドダイ
18 多層スロットダイ
19 単層スロットダイ
Claims (9)
- 支持基材の少なくとも一方に、表面層を有する積層フィルムであって、以下の条件1から条件3を満たす積層フィルム:
条件1:最大荷重0.5mN、保持時間10秒の条件における微小硬度計を用いた負荷-除荷試験法における、前記表面層の厚み方向の最大変位量が1.50μm以上、かつ、前記表面層の厚み方向の残存変位量が1.30μm以下;
条件2:剛体振り子試験法における、前記表面層の100℃における相対貯蔵弾性率が、前記表面層の25℃における相対貯蔵弾性率より高い;
条件3:引張試験法における、前記表面層の150℃におけるクラック伸度が50%以上。 - 前記積層フィルムにおいて、以下の条件4および条件5を満たす、請求項1に記載の積層フィルム:
条件4:引張試験法における、前記表面層の25℃における破断伸度が150%以上;
条件5:変形量150%での引張試験法における、前記表面層の25℃における弾性復元率が70%以上。 - 前記積層フィルムにおいて、支持基材が以下の条件6を満たす、請求項1または請求項2に記載の積層フィルム:
条件6:前記支持基材の膨潤度指数が0.01以上。 - 前記積層フィルムにおいて、以下の条件7および条件8を満たす、請求項1から請求項3のいずれかに記載の積層フィルム:
条件7:引張試験法における、前記表面層の応力-ひずみ曲線に降伏点が存在しない;
条件8:引張試験法における、前記表面層の単位体積当たりの破壊エネルギーが500MPa以上。 - 前記積層フィルムにおいて、以下の条件9および条件10を満たす、請求項1から請求項4のいずれかに記載の積層フィルム:
条件9:前記表面層に含まれる樹脂が以下の(1)から(3)を含む;
(1)ポリカーボネートセグメント;
(2)ウレタン結合;
(3)化学式3のポリシロキサンセグメントおよび/またはポリジメチルシロキサンセグメント;
条件10:前記表面層のクロロホルム溶解量が3質量%以上20質量%以下。 - 前記積層フィルムにおいて、さらに中間層を有する積層フィルムであって、支持基材に中間層および表面層がこの順で接しており、かつ、以下の条件11を満たす、請求項1から請求項5のいずれかに記載の積層フィルム:
条件11:前記中間層のガラス転移温度が60℃以上130℃以下。 - 前記積層フィルムにおいて、さらに中間層を有する積層フィルムであって、支持基材に中間層および表面層がこの順で接しており、かつ、以下の条件12を満たす、請求項1から請求項6のいずれかに記載の積層フィルム:
条件12:前記中間層の厚みが0.1μm以上5μm以下。 - 前記積層フィルムにおいて、以下の条件13を満たす、請求項6または請求項7に記載の積層フィルム:
条件13:前記表面層および/または前記中間層が、二種類以上の塗料組成物を支持基材上に逐次に塗布し、乾燥し、硬化することにより形成されたものである。 - 前記積層フィルムにおいて、以下の条件14を満たす、請求項6または請求項7に記載の積層フィルム:
条件14:前記表面層および/または前記中間層が、二種類以上の塗料組成物を支持基材上に同時に塗布し、乾燥し、硬化することにより形成されたものである。
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JP2018167574A (ja) * | 2017-03-30 | 2018-11-01 | 東レフィルム加工株式会社 | 自己修復性積層体および保護フィルム |
JP2019051692A (ja) * | 2016-11-29 | 2019-04-04 | 東レ株式会社 | 積層体 |
JP2020157563A (ja) * | 2019-03-26 | 2020-10-01 | 大日本印刷株式会社 | 加飾シートおよび加飾樹脂成形品 |
WO2020196845A1 (ja) * | 2019-03-28 | 2020-10-01 | 大日精化工業株式会社 | 塗料組成物及び塗料皮膜 |
JP2022533361A (ja) * | 2019-05-17 | 2022-07-22 | シントマー スンディリアン ブルハド | エラストマーフィルムの修復またはリサイクル方法 |
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KR20210033567A (ko) | 2019-09-18 | 2021-03-29 | 삼성디스플레이 주식회사 | 윈도우 및 이를 포함하는 표시 장치 |
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KR20160061324A (ko) | 2016-05-31 |
JPWO2015046049A1 (ja) | 2017-03-09 |
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EP3050701A1 (en) | 2016-08-03 |
CN105555522A (zh) | 2016-05-04 |
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