WO2020071477A1 - アクリル系樹脂フィルム - Google Patents
アクリル系樹脂フィルムInfo
- Publication number
- WO2020071477A1 WO2020071477A1 PCT/JP2019/039085 JP2019039085W WO2020071477A1 WO 2020071477 A1 WO2020071477 A1 WO 2020071477A1 JP 2019039085 W JP2019039085 W JP 2019039085W WO 2020071477 A1 WO2020071477 A1 WO 2020071477A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- polymer
- film
- crosslinked
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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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
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- 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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
Definitions
- the present invention relates to an acrylic resin film. More specifically, the present invention relates to an acrylic resin film having excellent weather resistance, workability, and molding stability, which is suitable for decoration or for building materials.
- thermoplastic resin film having a glossy glossy appearance on the surface and a matte (matte) thermoplastic resin film on the surface are used. Have been.
- a decorative or building material resin film is often used for a long period of ten to several tens of years in an object to be decorated or a building. During that time, the resin film undergoes discoloration, cracking, cloudiness, surface damage, peeling, and the like. Therefore, high weather resistance is required for resin films for decoration and building materials.
- Patent Document 1 discloses a transparent film layer in a visible light region having a first surface and a second surface opposed to the first surface, and a pressure-sensitive transparent film layer in a visible light region disposed on the second surface.
- the film layer has an average transmittance of 1.5% or less at a wavelength of 280 nm to 380 nm, and the pressure-sensitive adhesive layer has at least one metal ion generated from the metal base material.
- a decorative film containing a (meth) acrylic polymer having an amino group capable of forming a metal complex is disclosed.
- Patent Document 2 discloses a polarizer comprising a thermoplastic resin composition having a glass transition temperature of 110 ° C. or more, wherein the thermoplastic resin composition contains a thermoplastic acrylic resin and an ultraviolet absorber having a molecular weight of 700 or more.
- a protective film is disclosed.
- the ultraviolet absorber those having a hydroxyphenyltriazine skeleton are disclosed.
- Patent Document 3 discloses that the first layer has a methyl methacrylate unit of 30 to 99.99% by mass, an alkyl acrylate unit having an alkyl group having 1 to 8 carbon atoms of 1 to 70% by mass, and a polyfunctional monomer.
- a crosslinked polymer layer comprising 0.01 to 2% by mass of units, wherein the second layer has 70 to 99.9% by mass of alkyl acrylate units having an alkyl group having 1 to 8 carbon atoms, and 0 units of methyl methacrylate.
- a cross-linked elastic polymer layer comprising from 30 to 30% by mass and from 0.1 to 5% by mass of a multifunctional monomer unit, wherein the third layer comprises from 80 to 99% by mass of methyl methacrylate units and from 1 to carbon atoms.
- An acrylic thermoplastic resin containing 1 to 600 parts by mass of an acrylic thermoplastic polymer (B) having a content of 1.0 dl / g is heated and melted, and then discharged from a T-die to form a first rubber roll. And a second rubber roll, and a method for producing a film including a step of pressing the film.
- Patent Document 3 exemplifies a hydroxyphenyltriazine-based ultraviolet absorber as an optional component.
- an ultraviolet absorber may be added to the resin as a raw material of the resin film to form a film.
- a large amount of an ultraviolet absorber must be added.
- poor appearance due to bleed-out, an increase in production cost, a decrease in moldability and molding stability, etc. are caused.
- An object of the present invention is to provide an acrylic resin film which is excellent in weather resistance, workability, and molding stability and is suitable for decoration or building materials.
- an acrylic multilayer polymer (A) comprising an outer layer made of a thermoplastic polymer (III) and a layer of a crosslinked elastic body covered in contact with the outer layer;
- a methacrylic resin (B) containing 99% by mass or more of methyl methacrylate units and having a weight average molecular weight of 50,000 to 200,000;
- An ultraviolet absorber (C) having a hydroxyphenyltriazine skeleton, The amount of the ultraviolet absorber (C) is 0.1 to 1.5% by mass based on the total amount of the acrylic multilayer polymer (A) and the methacrylic resin (B);
- the mass ratio of the methacrylic resin (B) to the acrylic multilayer polymer (A) is 10/90 to 50/50,
- the layer of the crosslinked elastic body has an intermediate layer made of the crosslinked rubber polymer (II), and an inner layer made of the crosslinked polymer (I) and covered in contact with the intermediate layer,
- the crosslinked polymer (I) contains 40 to
- the crosslinked rubber polymer (II) is composed of 90 to 98.9% by mass of a structural unit derived from an alkyl acrylate having an alkyl group having 1 to 8 carbon atoms, and is derived from a monofunctional monomer other than the alkyl acrylate.
- thermoplastic polymer (III) is derived from an alkyl methacrylate having an alkyl group having 1 to 8 carbon atoms, from 80 to 100% by mass of a structural unit, and from a monofunctional monomer other than the alkyl methacrylate.
- the average diameter of the layer of the crosslinked elastic body is 120 nm or less
- the amount of the crosslinked rubber polymer (II) is 80 to 90% by mass based on the total amount of the crosslinked polymer (I) and the crosslinked rubber polymer (II)
- the mass of the acetone-insoluble component is based on the mass of the film. 35 to 55% by mass. the film.
- a film comprising the film according to any one of [1] to [6] and a functional layer laminated.
- a film comprising the film according to any one of the above [1] to [7] and another thermoplastic resin film laminated.
- the acrylic resin film of the present invention is excellent in weather resistance, workability, and molding stability.
- the acrylic resin film of the present invention is suitable for decoration or building materials.
- the decomposition of the added ultraviolet absorber is suppressed, so that the amount of the ultraviolet absorber necessary for improving the weather resistance can be reduced.
- the acrylic resin film of the present invention has high resistance to processing such as printing, lamination, and adhesion.
- the acrylic resin film having a high strain hardening property of the present invention can be favorably formed and processed even when the speed of the forming and processing is increased.
- the acrylic resin film of the present invention contains an acrylic multilayer polymer (A), a methacrylic resin (B), and an ultraviolet absorber (C).
- the total amount of the acrylic multilayer polymer (A), the methacrylic resin (B), and the ultraviolet absorber (C) is preferably 90 to 100 parts by mass based on 100 parts by mass of the acrylic resin film of the present invention. Parts by mass, more preferably 96 to 100 parts by mass, still more preferably 97.5 to 99.5 parts by mass, still more preferably 98 to 99.1 parts by mass, particularly preferably 98 to 99 parts by mass.
- the acrylic multilayer polymer (A) used in the present invention is composed of an outer layer made of a thermoplastic polymer (III) and a layer of a crosslinked elastic material covered in contact with the outer layer.
- thermoplastic polymer (III) is composed of a structural unit derived from an alkyl methacrylate having an alkyl group having 1 to 8 carbon atoms (in this specification, sometimes referred to as a C1-8 alkyl methacrylate). Is a polymer comprising a structural unit derived from a monofunctional monomer other than methacrylic acid C1-8 alkyl ester. It is preferable that the thermoplastic polymer (III) does not contain a structural unit derived from a polyfunctional monomer.
- the amount of the structural unit derived from the C1-8 alkyl methacrylate constituting the thermoplastic polymer (III) is 80 to 100% by mass based on the total amount of the structural units constituting the thermoplastic polymer (III). , Preferably 85 to 95% by mass.
- Examples of the C1-8 alkyl methacrylate include methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, propyl methacrylate, cyclohexyl methacrylate, and the like. Of these, methyl methacrylate is preferred.
- the amount of the structural unit derived from the monofunctional monomer other than the methacrylic acid C1-8 alkyl ester constituting the thermoplastic polymer (III) is based on the amount of all the structural units constituting the thermoplastic polymer (III). 0 to 20% by mass, preferably 5 to 15% by mass.
- Monofunctional monomers other than C1-8 alkyl methacrylate include acrylates such as methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate and propyl acrylate; styrene, p-methylstyrene And aromatic vinyl compounds such as ⁇ -methylstyrene; and maleimide compounds such as N-propylmaleimide, N-cyclohexylmaleimide and No-chlorophenylmaleimide.
- alkyl acrylates are preferred, C1-8 alkyl acrylates are more preferred, and butyl acrylate is even more preferred.
- thermoplastic polymer (III) the total of the structural units derived from the C1-8 alkyl methacrylate and the structural units derived from the monofunctional monomer other than the C1-8 alkyl methacrylate is 100% by mass. Is preferred.
- the outer layer may be a single layer composed of one type of thermoplastic polymer (III) or a multilayer composed of two or more types of thermoplastic polymer (III).
- the amount of the thermoplastic polymer (III) is preferably from 60 to 70% by mass, more preferably from 62 to 68% by mass, and still more preferably from 64 to 66% by mass, based on the amount of the acrylic multilayer polymer.
- the layer of the crosslinked elastic body has an intermediate layer made of the crosslinked rubber polymer (II) and an inner layer made of the crosslinked polymer (I) and covered in contact with the intermediate layer.
- the inner layer and the intermediate layer preferably form a core and a shell.
- the total amount of the crosslinked polymer (I) and the crosslinked rubber polymer (II) is preferably from 30 to 40% by mass, more preferably from 32 to 38% by mass, based on the amount of the acrylic multilayer polymer (A). More preferably, the content is 34 to 36% by mass.
- the crosslinked polymer (I) is composed of a structural unit derived from methyl methacrylate, a structural unit derived from a monofunctional monomer other than methyl methacrylate, and a structural unit derived from a polyfunctional monomer.
- the amount of the structural unit derived from methyl methacrylate constituting the crosslinked polymer (I) is from 40 to 98.5% by mass, preferably 45% by mass, based on the total amount of the structural units constituting the crosslinked polymer (I). 9595% by mass.
- the amount of the structural unit derived from the monofunctional monomer other than methyl methacrylate constituting the crosslinked polymer (I) is 1 to 59.59 based on the amount of all the structural units constituting the crosslinked polymer (I). It is 5% by mass, preferably 5 to 55% by mass.
- Monofunctional monomers other than methyl methacrylate include methacrylic esters other than methyl methacrylate such as ethyl methacrylate, butyl methacrylate, and cyclohexyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate, acrylic acid 2 Acrylic acid esters such as ethylhexyl and propyl acrylate; aromatic vinyl compounds such as styrene, p-methylstyrene and ⁇ -methylstyrene; maleimide compounds such as N-propylmaleimide, N-cyclohexylmaleimide and No-chlorophenylmaleimide Can be mentioned. Of these, alkyl acrylates are preferred, C1-8 alkyl acrylates are more preferred, and butyl acrylate is even more preferred.
- the amount of the structural unit derived from the polyfunctional monomer constituting the crosslinked polymer (I) is 0.05 to 0.4% by mass based on the total amount of the structural units constituting the crosslinked polymer (I). , Preferably 0.1 to 0.3% by mass.
- the polyfunctional monomer include ethylene glycol dimethacrylate, propylene glycol dimethacrylate, triethylene glycol dimethacrylate, hexanediol dimethacrylate, ethylene glycol diacrylate, propylene glycol diacrylate, triethylene glycol diacrylate, allyl methacrylate, triallyl. Isocyanurate and the like can be mentioned.
- the crosslinked polymer (I) has a total of 100% by mass of a structural unit derived from methyl methacrylate, a structural unit derived from a monofunctional monomer other than methyl methacrylate, and a structural unit derived from a polyfunctional monomer. It is preferred that
- the inner layer may be a single layer composed of one kind of crosslinked polymer (I) or a multilayer composed of two or more kinds of crosslinked polymer (I).
- the inner layer made of the crosslinked polymer (I) is used to control the flexibility of the layer of the crosslinked elastic body, or to provide a function of storing a low molecular weight additive such as an ultraviolet absorber. It is preferable that the multilayer is composed of at least one kind of crosslinked polymer (I).
- the crosslinked rubber polymer (II) is a structural unit derived from an alkyl acrylate having an alkyl group having 1 to 8 carbon atoms (herein, sometimes referred to as a C1-8 alkyl acrylate). It comprises a structural unit derived from a monofunctional monomer other than the acid alkyl ester and a structural unit derived from a polyfunctional monomer.
- the amount of the structural unit derived from the C1-8 alkyl acrylate constituting the crosslinked rubber polymer (II) is 90 to 98.9 based on the total amount of the structural units constituting the crosslinked rubber polymer (II). % By mass, preferably 91 to 97% by mass.
- Examples of the C1-8 alkyl acrylate include methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, propyl acrylate, and the like.
- the amount of the structural unit derived from the monofunctional monomer other than the alkyl acrylate is 0.1 to 8.3% by mass, preferably 0.1 to 8.3% by mass, based on the total amount of the structural units constituting the crosslinked polymer (II). 1.3 to 7.3% by mass.
- the monofunctional monomer other than the alkyl acrylate include methacrylates such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, and cyclohexyl methacrylate; and styrene, p-methylstyrene, ⁇ -methylstyrene and the like.
- Aromatic vinyl compounds such as N-propylmaleimide, N-cyclohexylmaleimide and No-chlorophenylmaleimide; and conjugated dienes such as 1,3-butadiene and isoprene.
- alkyl methacrylate is preferred, C1-8 alkyl methacrylate is more preferred, and methyl methacrylate is even more preferred.
- the amount of the structural unit derived from the polyfunctional monomer constituting the crosslinked rubber polymer (II) is 1 to 1.7% by mass based on the total amount of the structural units constituting the crosslinked rubber polymer (II). , Preferably 1.2 to 1.6% by mass, more preferably 1.3 to 1.5% by mass.
- the polyfunctional monomer include ethylene glycol dimethacrylate, propylene glycol dimethacrylate, triethylene glycol dimethacrylate, hexanediol dimethacrylate, ethylene glycol diacrylate, propylene glycol diacrylate, triethylene glycol diacrylate, allyl methacrylate, triallyl. Isocyanurate and the like can be mentioned.
- the structural unit derived from the polyfunctional monomer in the crosslinked polymer (I) relative to the amount of the structural unit derived from the polyfunctional monomer in the crosslinked rubber polymer (II) Is preferably 0.05 to 0.25, more preferably 0.1 to 0.2, by mass ratio.
- the glass transition temperature of the crosslinked rubber polymer (II) is preferably lower than the glass transition temperature of the crosslinked polymer (I).
- Crosslinked rubber polymer (II) is a structural unit derived from a C1-8 alkyl acrylate and a structural unit derived from a monofunctional monomer other than the alkyl acrylate and a structural unit derived from a polyfunctional monomer. Is preferably 100% by mass.
- the intermediate layer may be a single layer composed of one type of crosslinked rubber polymer (II) or a multilayer composed of two or more types of crosslinked rubber polymer (II).
- the amount of the crosslinked rubber polymer (II) is from 80 to 90% by mass, preferably from 82 to 88% by mass, based on the total amount of the crosslinked polymer (I) and the crosslinked rubber polymer (II).
- the intermediate layer made of the crosslinked rubber polymer (II) mainly has a role of giving flexibility to the methacrylic resin composition of the present invention.
- the crosslinked polymer (I) constituting the inner layer and the crosslinked rubber polymer (II) constituting the intermediate layer preferably have their molecular chains connected by graft bonding. Further, it is preferable that the crosslinked rubber polymer (II) constituting the intermediate layer and the thermoplastic polymer (III) constituting the outer layer have their molecular chains connected by a graft bond.
- the graft bond is formed by a polymerization method (graft polymerization method) that includes a substituent bonded to the main chain of the already completed polymer as a reaction active site, from which a branch portion is newly extended. It is a bond that connects the main chain and the branch.
- the average diameter of the layer of the crosslinked elastic body is 120 nm or less, preferably 60 to 110 nm, more preferably 65 to 105 nm, and further preferably 70 to 100 nm.
- the average diameter of the layer of the crosslinked elastic body in the present invention can be measured as follows. Using a hydraulic press molding machine, a methacrylic resin composition containing the acrylic multilayer polymer (A) was molded into a mold having a size of 50 mm ⁇ 120 mm, a press temperature of 250 ° C., a preheating time of 3 minutes, and a press pressure of 50 kg / cm 2.
- the acrylic multilayer polymer (A) used in the present invention has a graft ratio of preferably from 33 to 50% by mass, more preferably from 35 to 48% by mass, and still more preferably from 40 to 45% by mass.
- a graft ratio of preferably from 33 to 50% by mass, more preferably from 35 to 48% by mass, and still more preferably from 40 to 45% by mass.
- the graft ratio can be adjusted by controlling the structural unit derived from the polyfunctional monomer in the crosslinked rubber polymer (II).
- a polyfunctional monomer having a double bond equivalent of preferably 50 to 250, more preferably 60 to 200 is employed in the crosslinked rubber polymer (II) to form the crosslinked rubber polymer (II).
- the amount of the structural unit derived from the functional monomer is preferably 1 to 2% by mass, more preferably 1.2 to 1.8%, based on the total amount of the structural units constituting the crosslinked rubber polymer (II). % By mass, more preferably 1.3 to 1.7% by mass.
- the double bond equivalent is a value obtained by dividing the molecular weight of the polyfunctional monomer by the number of double bonds in one molecule of the polyfunctional monomer.
- the acrylic multilayer polymer (A) is not particularly limited depending on the production method.
- emulsion polymerization and the like can be mentioned.
- a monomer (i) for constituting the crosslinked polymer (I) is emulsion-polymerized to obtain a latex containing the crosslinked polymer (I), and a crosslinked rubber polymer (
- the monomer (ii) for constituting the (II) is added, and the monomer (ii) is subjected to seed emulsion polymerization to obtain a latex containing the crosslinked polymer (I) and the crosslinked rubber polymer (II).
- a monomer (iii) for constituting the thermoplastic polymer (III) is added, and the monomer (iii) is subjected to seed emulsion polymerization to obtain a latex containing an acrylic multilayer polymer.
- Emulsion polymerization is a known method used to obtain a latex containing a polymer.
- Seed emulsion polymerization is a method in which a monomer is polymerized on the surface of seed particles. Seed emulsion polymerization is preferably used to obtain core-shell structured polymer particles.
- the polymerization initiator used in the emulsion polymerization and the seed emulsion polymerization is not particularly limited.
- the polymerization initiator include water-soluble inorganic initiators such as potassium persulfate and ammonium persulfate; redox initiators obtained by using sulfites or thiosulfates in combination with inorganic initiators; Redox initiators and the like, which are used in combination with ferrous salts or sodium sulfoxylate, may be mentioned.
- the polymerization initiator may be added to the reaction system all at once at the start of polymerization, or may be added to the reaction system at the start of polymerization and during the polymerization in consideration of the reaction rate and the like.
- Emulsifiers used in emulsion polymerization and seed emulsion polymerization are not particularly limited.
- the emulsifier include dialkyl sulfosuccinates such as sodium dioctyl sulfosuccinate and sodium dilauryl sulfosuccinate, alkylbenzene sulfonates such as sodium dodecylbenzene sulfonate, and alkyl sulfates such as sodium dodecyl sulfate, which are anionic emulsifiers;
- Nonionic anionic emulsifiers such as polyoxyethylene alkyl ether sulfates such as sodium polyoxyethylene alkyl ether sulfate, and alkyl ether carboxylic acids such as sodium polyoxyethylene tridecyl ether acetate.
- the added mole number of the oxyethylene structural unit in the nonionic emulsifier and the nonionic anionic emulsifier is preferably 30 mol or less, more preferably 20 mol or less, most preferably, in order to prevent the foaming property of the emulsifier from becoming extremely large. Is 10 mol or less.
- These emulsifiers can be used alone or in combination of two or more.
- the amounts of the polymerization initiator and the emulsifier can be appropriately set so that the average particle diameter of the acrylic multilayer polymer (A) contained in the latex falls within a desired range.
- the amount of the emulsifier used varies depending on the type of the emulsifier, but is preferably, for example, 0.5 to 3 parts by mass, more preferably 0.5 to 3 parts by mass, based on 100 parts by mass of the total amount of monomers for producing the acrylic multilayer polymer. Is 1 to 2 parts by mass.
- the average particle size of the acrylic multilayer polymer (A) contained in the latex is preferably from 80 nm to 150 nm, more preferably from 90 nm to 120 nm. If the average particle size of the acrylic multilayer polymer is too small, the viscosity of the latex tends to increase. If the average particle size of the acrylic multilayer polymer (A) is too large, the stress whitening resistance tends to decrease.
- the average particle size of the acrylic multilayer polymer (A) contained in the latex can be determined as follows. A latex containing the acrylic multilayer polymer (A) is diluted with ion-exchanged water to a concentration of 0.05% by mass, and the obtained diluted solution is thinly cast on a support plate and dried. A gold-palladium alloy is vapor-deposited on the dried product, which is observed with a scanning transmission electron microscope (JSM7600F, manufactured by JEOL Ltd.) to determine the number average particle diameter.
- JSM7600F scanning transmission electron microscope
- the emulsion polymerization of the monomer (i), the seed emulsion polymerization of the monomer (ii) and the seed emulsion polymerization of the monomer (iii) may be sequentially performed in one polymerization tank, The polymerization may be performed sequentially by changing the polymerization tank each time the emulsion polymerization of the monomer (i), the seed emulsion polymerization of the monomer (ii), and the seed emulsion polymerization of the monomer (iii). In the present invention, each polymerization is preferably performed sequentially in one polymerization tank.
- the temperature of the reaction system during the polymerization is preferably 30 to 120 ° C, more preferably 50 to 100 ° C.
- a reactive ultraviolet absorber for example, 2- [2-hydroxy-5- (2-methacryloyloxyethyl) phenyl] -2H-1,2,3-benzotriazole and the like can be added.
- the reactive ultraviolet absorber is introduced into the molecular chain of the acrylic multilayer polymer (A), and the ultraviolet resistance of the acrylic multilayer polymer (A) is improved.
- the amount of the reactive ultraviolet absorber added is preferably 0.05 to 5 parts by mass based on 100 parts by mass of the total amount of the monomers used for producing the acrylic multilayer polymer (A).
- a chain transfer agent can be used in each polymerization for controlling the molecular weight.
- the chain transfer agent used for each polymerization is not particularly limited.
- Examples of the chain transfer agent include alkyl mercaptans such as n-octyl mercaptan, n-dodecyl mercaptan, t-dodecyl mercaptan and n-hexadecyl mercaptan; xanthogen disulfides such as dimethyl xanthogen disulfide and diethyl xanthogen disulfide; tetratetrauram disulfide Thiuram disulfides; and halogenated hydrocarbons such as carbon tetrachloride and ethylene bromide.
- the amount of the chain transfer agent to be used can be appropriately set within a range where each of the polymers (I), (II) and (III) can be adjusted to a predetermined molecular weight.
- the amount of the chain transfer agent used in the seed emulsion polymerization of the monomer (iii) can be appropriately set so that the acrylic multilayer polymer has a desired melt flow rate.
- the suitable amount of the chain transfer agent used in each polymerization varies depending on the amount of the polymerization initiator used in the polymerization and the like.
- the amount of the chain transfer agent used in the seed emulsion polymerization of the monomer (iii) is preferably 0.05 to 2 parts by mass, more preferably 0.08 to 100 parts by mass of the monomer (iii). To 1 part by mass.
- the coagulation of the latex can be performed by a known method.
- the coagulation method include a freeze coagulation method, a salting out coagulation method, and an acid precipitation coagulation method.
- the freeze-coagulation method that does not require the addition of a coagulant as an impurity or the salting-out coagulation method that can be washed is preferable in that a coagulated product with less impurities can be obtained.
- Spray drying of latex may be employed instead of coagulation of latex. Before coagulating or spray-drying the latex, it is preferable to filter the latex through a wire mesh having an opening of 50 ⁇ m or less in order to remove foreign substances.
- the slurry obtained by coagulation is washed with water or the like as necessary, and then dewatered. Washing and dehydration are preferably repeated so that the properties of the acrylic multilayer polymer (A) fall within a desired range.
- water-soluble components such as an emulsifier and a catalyst can be removed from the slurry. Washing and dewatering of the slurry can be performed by, for example, a filter press, a belt press, a ginna centrifuge, a screw decanter centrifuge, or the like. It is preferable to use a decanter-type centrifugal dehydrator from the viewpoints of productivity and washing efficiency.
- Washing and dehydration of the slurry are preferably performed at least twice. As the number of times of washing and dehydration increases, the remaining amount of the water-soluble component decreases. However, from the viewpoint of productivity, the number of times of washing and dehydration is preferably 3 times or less.
- the dehydration is performed so that the water content of the slurry is preferably less than 0.3% by mass, more preferably less than 0.2% by mass.
- the drying of the dehydrated slurry is preferably performed at a temperature of 40 to 80 ° C. in order to further reduce the water content while preventing the deterioration of the polymer.
- the drying of the dehydrated slurry is performed for an average residence time, preferably 0.5 to 5 hours, more preferably 1 to 3 hours. As the water content after dehydration and drying is lower, the hot water whitening resistance and boiling water whitening resistance tend to be improved.
- the methacrylic resin (B) used in the present invention comprises a structural unit derived from methyl methacrylate and, if necessary, a structural unit derived from a monofunctional monomer other than methyl methacrylate.
- the total amount of the structural units derived from methyl methacrylate and the structural units derived from monofunctional monomers other than methyl methacrylate is preferably 100% by mass.
- the amount of the structural unit derived from methyl methacrylate in the methacrylic resin (B) is at least 99% by mass, preferably more than 99% by mass, more preferably more than 99% by mass, based on the total amount of the structural units of the methacrylic resin (B). It is more than 99.5% by mass, more preferably 100% by mass.
- the amount of the structural unit derived from the monofunctional monomer other than methyl methacrylate in the methacrylic resin (B) is 1% by mass or less, preferably 1% by mass, based on the total structural units of the methacrylic resin (B). It is less than 0.5% by mass, more preferably less than 0.5% by mass, and still more preferably 0% by mass.
- Monofunctional monomers other than methyl methacrylate include methyl acrylate, ethyl acrylate, butyl acrylate, propyl acrylate, hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, phenyl acrylate, benzyl acrylate
- Acrylate monomers such as ethyl methacrylate, butyl methacrylate, propyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, methacrylate esters other than methyl methacrylate such as benzyl methacrylate; vinyl acetate, Aromatic vinyl compounds such as styrene, p-methylstyrene, o-methylstyrene, m-methylstyrene, ⁇ -methylstyrene and vinylnaphthalene; ethylenically uns
- the methacrylic resin (B) has a glass transition temperature of preferably 95 ° C. or higher, more preferably 100 ° C. or higher, and still more preferably 105 ° C. or higher.
- the methacrylic resin (B) has a melt flow rate under a load of 3.8 kg at 230 ° C. of preferably 0.5 to 20 g / 10 min, more preferably 0.8 to 10 g / 10 min.
- the methacrylic resin (B) has a weight average molecular weight (Mw) of preferably 60,000 to 150,000, and more preferably 70,000 to 140,000.
- the weight average molecular weight (Mw) of the methacrylic resin (B) is adjusted so that the ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn of the acetone-soluble component contained in the acrylic resin film falls within a desired range. It is preferable to set.
- the methacrylic resin (B) is not particularly limited by its production method. For example, it can be obtained by performing a known polymerization reaction such as a radical polymerization reaction or an anion polymerization reaction by a known polymerization method such as a bulk polymerization method or a solution polymerization method.
- a commercially available methacrylic resin (B) can be used.
- methacrylic resin a methacrylic resin specified in ISO 8257-1 may be used.
- the mass ratio of the methacrylic resin (B) to the acrylic multilayer polymer (A) is 10/90 to 50/50, preferably 15/85 to 35/65, more preferably 18/82 to 32/68. .
- the ultraviolet absorber (C) used in the present invention is a compound having a hydroxyphenyltriazine skeleton.
- Examples of the ultraviolet absorbent (C) used in the present invention include a compound represented by the formula (X).
- R 1 is an organic group, preferably a substituted or unsubstituted alkoxy group, more preferably a branched alkoxy group having 6 to 10 carbon atoms.
- n is an integer of 1 to 5, preferably 1 or 2. When n is 1, the OH group is preferably bonded to the 2-position of the phenyl group.
- m is 5-n, preferably 1 or 2.
- R 1 When m is 2 or more, R 1 may be the same or different, but is preferably the same.
- R 2 and R 3 each independently represent a hydrogen atom or an organic group, preferably a hydrogen atom or a substituted or unsubstituted aryl group, more preferably a substituted or unsubstituted biphenylyl group, and further preferably Is a 1,1′-biphenyl-4-yl group.
- the hydroxyphenyl group bonded to the triazine ring is preferably substituted with an alkoxy group having 6 to 12 carbon atoms.
- the number of hydroxyphenyl groups substituted with an alkoxy group bonded to the triazine ring can be 3, preferably 2, and more preferably 1.
- the compound having a hydroxyphenyltriazine skeleton for example, 2- (2-hydroxyphenyl) -1,3,5-triazine, 2,4,6-tris (2-hydroxy-4-octyloxyphenyl) -1,3,5-triazine, 2,4,6-tris (2-hydroxy-4-hexyloxy-3-methylphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-octyloxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2,4-dihydroxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2,4-bis (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-octyloxyphenyl) -4,6-bis
- the acrylic resin film of the present invention may contain another polymer or resin or a resin additive, if necessary.
- the resin additive include an ultraviolet absorber other than the ultraviolet absorber (C), a light diffusing agent, a matting agent, a filler, an antioxidant, a heat deterioration inhibitor, a light stabilizer, a plasticizer, a lubricant, and a release agent.
- examples include a mold agent, an antistatic agent, a flame retardant, a dye / pigment, an organic dye, an impact resistance modifier, a foaming agent, and a phosphor.
- the total content of the resin additive is preferably 0 to 10 parts by mass, more preferably 0 to 5 parts by mass, and still more preferably 0 to 2 parts by mass with respect to 100 parts by mass of the acrylic resin film.
- the other polymer or resin or resin additive may be added when the resin is melted, may be dry-blended with the resin pellets, or may be added by a master batch method.
- polymers or resins include olefin resins such as polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, and polynorbornene; ethylene ionomers; polystyrene, styrene-maleic anhydride copolymer, Styrene resins such as impact polystyrene, AS resin, ABS resin, AES resin, AAS resin, ACS resin, and MBS resin; methyl methacrylate-styrene copolymer; ester resins such as polyethylene terephthalate and polybutylene terephthalate; nylon 6, Polyamide such as nylon 66 and polyamide elastomer; polycarbonate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyacetal, polyolefin Vinylidene fluoride, polyurethane, modified polyphenylene ether, polyphenylene sulfide,
- the light diffusing agent or matting agent examples include glass fine particles, polysiloxane-based crosslinked fine particles, crosslinked polymer fine particles, inorganic fine particles such as talc, calcium carbonate, calcium phosphate, titanium oxide, and barium sulfate, inorganic or organic balloons, and organic fine particles. No. These can be used alone or in combination of two or more.
- the light diffusing agent or matting agent blended in the acrylic resin film has an average particle size of preferably 67% or less, more preferably 40% or less, and still more preferably 13%, based on the thickness of the acrylic resin film. % Is preferable.
- filler examples include calcium carbonate, talc, carbon black, titanium oxide, silica, mica, clay, barium sulfate, and magnesium carbonate. These can be used alone or in combination of two or more.
- the antioxidant examples include a phosphorus-based antioxidant, a hindered phenol-based antioxidant, and a thioether-based antioxidant. From the viewpoint of the effect of preventing deterioration of the optical characteristics due to coloring, a phosphorus-hindered phenol-based antioxidant, a phosphorus-based antioxidant and a hindered phenol-based antioxidant are preferred, and the phosphorus-based antioxidant and the hindered phenol-based antioxidant are preferred. Use in combination with an agent is more preferred.
- the amount of the phosphorus-based antioxidant is 1: 5 to 2: 1 is preferable, and 1: 2 to 1: 1 is more preferable.
- Examples of the phosphorus antioxidant include 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite (manufactured by ADEKA; trade name: ADK STAB HP-10) and tris (2,4-di-t-butyl). Butylphenyl) phosphite (manufactured by BASF; trade name: IRGAFOS168) and 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa 3, Preferred is 9-diphosphaspiro [5.5] undecane (made by ADEKA; trade name: ADK STAB PEP-36).
- Hindered phenolic antioxidants include pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (manufactured by BASF; trade name IRGANOX1010) and octadecyl-3- (3,5-Di-t-butyl-4-hydroxyphenyl) propionate (manufactured by BASF; trade name IRGANOX1076) is preferred.
- antioxidants examples include 6- [3- (3-t-butyl-4-hydroxy-5-methyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d , F] [1,3,2] -dioxasphosphepin (manufactured by Sumitomo Chemical Co .; trade name: Sumilizer GP) and the like are preferable. These antioxidants can be used alone or in combination of two or more.
- thermal deterioration inhibitor examples include 2-t-butyl-6- (3′-t-butyl-5′-methyl-hydroxybenzyl) -4-methylphenyl acrylate (Sumitomo Chemical Co .; trade name Sumilizer GM), and 2,4-di-t-amyl-6- (3 ′, 5′-di-t-amyl-2′-hydroxy- ⁇ -methylbenzyl) phenyl acrylate (Sumitomo Chemical Co .; trade name Sumilizer GS) is preferred.
- ultraviolet absorbers examples include benzophenones, benzotriazoles, triazines (excluding ultraviolet absorber (C)), benzoates, salicylates, cyanoacrylates, oxalic anilides, malonic esters, and formamidines. Is mentioned. These can be used alone or in combination of two or more. Among them, benzotriazoles or ultraviolet absorbers having a maximum molar absorption coefficient ⁇ max at a wavelength of 380 to 450 nm of 1200 dm 3 mol ⁇ 1 cm ⁇ 1 or less are preferable.
- Benzotriazoles include 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol and 2- (2H-benzotriazol-2-yl) -4 2,6-bis (1-methyl-1-phenylethyl) phenol, 2,2′-methylenebis [6- (2H-benzotriazol-2-yl) -4-tert-octylphenol], 2- (5-octylthio- 2H-benzotriazol-2-yl) -6-tert-butyl-4-methylphenol.
- UV absorbers having a maximum molar absorption coefficient ⁇ max of 1200 dm 3 mol ⁇ 1 cm ⁇ 1 or less at a wavelength of 380 to 450 nm include 2-ethyl-2′-ethoxy-oxalanilide (manufactured by Clariant Japan; product) (Sanyu Yuboa VSU) and the like.
- Examples of the light stabilizer include hindered amines such as a compound having a 2,2,6,6-tetraalkylpiperidine skeleton.
- Lubricants include stearic acid, behenic acid, stearamide acid, methylene bis-stearamide, hydroxystearic acid triglyceride, paraffin wax, ketone wax, octyl alcohol, and hardened oil. These can be used alone or in combination of two or more.
- the release agent examples include higher alcohols such as cetyl alcohol and stearyl alcohol; and higher glycerin fatty acid esters such as monoglyceride stearate and diglyceride stearate. These can be used alone or in combination of two or more. It is preferable to use a higher alcohol and a glycerin fatty acid monoester in combination as a release agent.
- the ratio is not particularly limited, but the ratio of the amount of the higher alcohol used to the amount of the glycerin fatty acid monoester is 2.5: 1 to 3. 5: 1 is preferred, and 2.8: 1 to 3.2: 1 is more preferred.
- the organic dye a compound having a function of converting ultraviolet light into visible light is preferably used.
- the phosphor include a fluorescent pigment, a fluorescent dye, a fluorescent white dye, a fluorescent brightener, and a fluorescent bleach. These can be used alone or in combination of two or more.
- the acrylic resin film of the present invention can be obtained by a known film forming method.
- the film forming method include an extrusion molding method, an inflation molding method, a blow molding method, a melt casting method, and a solution casting method.
- the extrusion molding method is preferred.
- the temperature of the resin discharged from the extruder is preferably set at 160 to 270 ° C, more preferably at 220 to 260 ° C.
- the methacrylic resin composition of the present invention is extruded from a T-die in a molten state, and then two or more are extruded.
- the method includes forming the film by sandwiching the film with a mirror roll or a mirror belt.
- the mirror roll or mirror belt is preferably made of metal.
- the linear pressure between the pair of mirror rolls or the mirror belt is preferably 2 N / mm or more, more preferably 10 N / mm or more, and even more preferably 30 N / mm or more.
- the surface temperature of the mirror roll or the mirror belt is preferably 130 ° C. or less. Further, it is preferable that at least one of the pair of mirror rolls or the mirror belt has a surface temperature of 60 ° C. or higher. When the surface temperature is set to such a value, the resin discharged from the extruder can be cooled at a higher speed than natural cooling, and a film having excellent surface smoothness and low haze can be easily produced.
- the acrylic resin film of the present invention may have been subjected to a stretching treatment.
- the stretching method is not particularly limited, and examples thereof include a uniaxial stretching method, a simultaneous biaxial stretching method, a sequential biaxial stretching method, and a tuber stretching method.
- the temperature at the time of stretching is preferably from 100 to 200 ° C., more preferably from 120 to 160 ° C., from the viewpoint that the film can be stretched uniformly and a high strength film can be obtained.
- Stretching is usually performed at 100 to 5000% / min on a length basis.
- the stretching is preferably performed so that the area ratio becomes 1.5 to 8 times.
- the thickness of the acrylic resin film of the present invention is not particularly limited, but is preferably 20 ⁇ m or more and 100 ⁇ m or less, more preferably 30 ⁇ m or more and 80 ⁇ m or less, still more preferably 45 ⁇ m or more and 70 ⁇ m or less, and still more preferably 50 ⁇ m or more and 60 ⁇ m or less. .
- the thinner the film the lower the UV absorbing power.
- bleed-out of an additive such as an ultraviolet absorber hardly occurs.
- the acrylic resin film of the present invention has a small thickness unevenness even at a small thickness. Further, the acrylic resin film of the present invention has excellent stress whitening resistance and does not whiten even when bent.
- the acrylic resin film of the present invention has an acetone-insoluble content of 35 to 55% by mass, preferably 38 to 52% by mass, based on the mass of the film.
- the mass of the acetone-insoluble component is determined as follows. A predetermined amount of an acrylic resin film is immersed in acetone overnight to obtain a solution, and the solution is centrifuged to separate into an acetone-insoluble component and an acetone-soluble component. The separated acetone-insoluble component is washed with acetone, and then acetone is removed. Evaporate at room temperature to obtain dry acetone-insoluble matter, and measure its mass.
- the acrylic resin film of the present invention includes a polarizer protective film, a retardation film, a liquid crystal protective plate, a surface material of a portable information terminal, a display window protective film of a portable information terminal, a light guide film, a silver nanowire and a carbon nanotube.
- Transparent conductive film coated on the surface, front panel use for various displays, etc .; films for construction materials, retroreflective films, IR cut films, security films, shatterproof films, decorative films, metal decorative films, solar cell backing Sheet, front sheet for flexible solar cell, shrink film, film for in-mold label, base film for gas barrier film, solar cell surface protection film, solar cell sealing film, solar cell backside protection film, solar cell base film , Protection film for gas barrier film, etc. It can be used.
- a functional layer can be provided on at least one surface of the acrylic resin film of the present invention.
- the functional layer include a hard coat layer, an antiglare layer, an antireflection layer, an antisticking layer, a light diffusion layer, a matting layer, an antistatic layer, an antifouling layer, a slippery layer, a gas barrier layer, and a printing layer.
- a hard coat layer an antiglare layer, an antireflection layer, an antisticking layer, a light diffusion layer, a matting layer, an antistatic layer, an antifouling layer, a slippery layer, a gas barrier layer, and a printing layer.
- the acrylic resin film of the present invention has excellent adhesiveness to a thermoplastic resin or the like
- another thermoplastic resin film can be laminated on at least one surface of the acrylic resin film of the present invention.
- the laminated film having the acrylic resin film of the present invention laminated with another thermoplastic resin film is not particularly limited by the manufacturing method thereof. For example, it can be manufactured using a method such as co-extrusion molding, press molding, coating extrusion molding, insert molding, in-mold molding, welding, bonding, and pressure bonding.
- thermoplastic resin constituting another thermoplastic resin film that can be used for the laminated film
- a polycarbonate polymer a vinyl chloride polymer, a vinylidene fluoride polymer, a methacryl resin, an ABS resin, an AES resin, AS resin and the above-mentioned thermoplastic resin
- a vinyl chloride polymer a vinylidene fluoride polymer
- a methacryl resin an ABS resin
- an AES resin AES resin
- AS resin AS resin and the above-mentioned thermoplastic resin
- the evaluation of the resin film was performed by the following method.
- (Workability) A resin film (thickness: 200 ⁇ m) was punched out so that the tensile direction in the tensile test was parallel to the MD direction, to obtain a JIS K 7127 (ISO572-3) type 1B test piece.
- the test piece was pulled at 200 mm / min and the elongation at break (EL) was measured.
- the elongation at break (EL) is represented by the ratio of the increase l-l 0 of the inter-chuck distance l immediately before breaking to the inter-chuck distance l 0 when the test piece is mounted: (l-l 0 ) / l ⁇ 100.
- the breaking elongation is preferably 50% or more.
- the resin film (thickness: 200 ⁇ m) was cut to obtain a test piece of 18 mm ⁇ 10 mm. Using a rotary rheometer (DHR manufactured by TA Instruments), the test piece was stretched and deformed at 200 ° C. (standby time: 30 seconds) and at a strain rate of 6.0 s ⁇ 1 . The cross-sectional area and the load were measured, and the uniaxial elongational viscosity was calculated from the measured values.
- the cross-sectional area S (t) of the test piece can also be calculated from the initial cross-sectional area S 0 and the strain rate ⁇ according to the formula: S 0 ⁇ exp ( ⁇ t).
- the time t (unit: seconds or s) and the uniaxial elongation viscosity ⁇ (unit: Pa ⁇ s) in the range from when 0.03 seconds have elapsed since the start of measurement to when 0.1 seconds have elapsed since the start of measurement.
- the inclination is preferably 1.0 ⁇ 10 4 Pa or more.
- the test piece of 50 mm x 50 mm was obtained by cutting the resin film.
- the test piece was irradiated with ultraviolet rays for 500 hours under the conditions of a black panel temperature of 83 ° C., a relative humidity of 50%, and an irradiation energy of 100 mW / cm 2 using a super UV tester (SUV-W161 manufactured by Iwasaki Electric Co., Ltd.). Thereafter, the test piece was taken out of the tester, and the transmittance in a wavelength range of 200 to 800 nm was measured using a spectrophotometer (UV3600, manufactured by Shimadzu Corporation). The lower the transmittance at a wavelength of 350 nm, the better the weather resistance. In the present invention, the transmittance is preferably 5% or less.
- a predetermined amount of an acrylic resin film was immersed in acetone overnight to obtain a solution.
- the solution was centrifuged to separate acetone-insoluble and acetone-soluble components.
- the separated acetone-insoluble matter was washed with acetone, and then acetone was evaporated at room temperature to obtain a dry acetone-insoluble matter, and its mass was measured.
- Acrylic multilayer polymer (A1) A reactor equipped with a stirrer, a thermometer, a nitrogen gas inlet tube, a monomer inlet tube and a reflux condenser was charged with 1050 parts of deionized water, 1 part of sodium dodecylbenzenesulfonate and 0.05 part of sodium carbonate, and reacted. The inside of the vessel was sufficiently replaced with nitrogen gas to make it substantially free of oxygen. The temperature inside the reactor was set to 80 ° C. Then, 0.1 part of a 3% aqueous solution of potassium persulfate was added thereto, followed by stirring for 5 minutes.
- a mixture (i) composed of 49.9% of methyl methacrylate (MMA), 49.9% of butyl acrylate (BA), and 0.2% of allyl methacrylate (ALMA) were added over 20 minutes. Added continuously. After the addition was completed, a polymerization reaction was further performed for at least 30 minutes so that the polymerization rate became 98% or more.
- the emulsion containing the acrylic multilayer polymer (A1) was frozen at ⁇ 30 ° C. for 4 hours.
- the frozen emulsion was poured into hot water of 80 ° C. twice as much as the frozen emulsion to dissolve, and then kept at 80 ° C. for 20 minutes to obtain a slurry.
- the slurry was subjected to a dehydration treatment, and further dried at 70 ° C. to obtain a powder of an acrylic multilayer polymer (A1). This powder was pelletized.
- Example 1 80 parts of acrylic multilayer polymer (A1) pellets, 20 parts of methacrylic resin (B1) (100% structural unit derived from MMA, weight average molecular weight 80,000), 2- [4,6-bis (1,1 '-Biphenyl-4-yl) -1,3,5-triazin-2-yl] -5-[(2-ethylhexyl) oxy] phenol (manufactured by BASF; trade name Tinuvin 1600) (1 part of the following formula X1) The mixture was kneaded using a twin screw extruder and pelletized using a pelletizer to obtain a thermoplastic resin (R1).
- B1 methacrylic resin
- R1 thermoplastic resin
- thermoplastic resin (R1) is melt-extruded at a discharge speed of 10 kg / h and a resin temperature of 260 ° C. To obtain a film-like melt, and then melt the melt into a first 50 ⁇ m-spaced first mirror-finished metal elastic roll whose temperature is adjusted to 64 ° C. and a mirror-finished metal rigid roll whose temperature is adjusted to 79 ° C.
- the nip roll is pressed at a linear pressure of 30 kg / cm, and then a second nip roll having a spacing of 50 ⁇ m and comprising a mirror-finished metal rigid roll whose temperature is adjusted to 65 ° C. and a mirror-finished metal rigid roll whose temperature is adjusted to 60 ° C.
- a single-layer resin film (1) having a thickness of 53 ⁇ m was obtained by clamping at a pressure of 30 kg / cm.
- Various evaluations were performed on the obtained resin film (1). Table 1 shows the evaluation results.
- the resin film (1) was excellent in workability, moldability, and weather resistance.
- Example 2 2- [4,6-bis (1,1′-biphenyl-4-yl) -1,3,5-triazin-2-yl] -5-[(2-ethylhexyl) oxy] phenol was converted to 2,4 , 6-Tris (2-hydroxy-4-hexyloxy-3-methylphenyl) -1,3,5-triazine (made by ADEKA; trade name: ADK STAB LA-F70) (except X2)
- a resin film (2) was obtained in the same manner as in Example 1. Table 1 shows the evaluation results. The resin film (2) was excellent in workability, moldability, and weather resistance.
- Example 3 A resin film (3) was obtained in the same manner as in Example 1, except that the amount of the acrylic multilayer polymer (A1) was changed to 70 parts and the amount of the methacrylic resin (B1) was changed to 30 parts. Table 1 shows the evaluation results. The resin film (3) was excellent in workability, moldability, and weather resistance.
- Example 4 A resin film (4) was obtained in the same manner as in Example 3, except that the methacrylic resin (B1) was changed to the methacrylic resin (B2) (100% of a structural unit derived from MMA, weight average molecular weight 111,000). Table 1 shows the evaluation results. The resin film (4) was excellent in workability, moldability, and weather resistance.
- Example 1 A resin film (5) was obtained in the same manner as in Example 3, except that the acrylic multilayer polymer (A1) was changed to the acrylic multilayer polymer (A2). Table 1 shows the evaluation results. It was predicted that the resin film (5) was inferior in workability and easily broken during processing.
- Example 2 A resin film (6) was obtained in the same manner as in Example 1, except that the amount of the acrylic multilayer polymer (A1) pellets was changed to 100 parts and the amount of the methacrylic resin (B1) was changed to 0 parts. Table 1 shows the evaluation results. It was predicted that the resin film (6) had low strain hardening property and was easily broken during molding.
- Example 3 The same method as in Example 1 was used except that the methacrylic resin (B1) was changed to a methacrylic resin (B3) (94% of a structural unit derived from MMA, 6% of a structural unit derived from methyl acrylate, and a weight average molecular weight of 12,000,000). A resin film (7) was obtained. Table 1 shows the evaluation results. The resin film (7) had poor weather resistance.
- Example 5 A resin film (9) was obtained in the same manner as in Example 3 except that the acrylic multilayer polymer (A1) was changed to the acrylic multilayer polymer (A3). Table 1 shows the evaluation results. It was predicted that the resin film (9) was inferior in workability and easily broken during processing.
- the acrylic resin film of the present invention has excellent weather resistance, workability, and molding stability, and is suitable for decoration or building materials.
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Abstract
Description
99質量%以上のメタクリル酸メチル単位を含み且つ重量平均分子量が50000以上200000以下であるメタクリル系樹脂(B)と、
ヒドロキシフェニルトリアジン骨格を有する紫外線吸収剤(C)と、を含有して成り、
紫外線吸収剤(C)の量がアクリル系多層重合体(A)とメタクリル系樹脂(B)との合計量に対して0.1~1.5質量%であり、
アクリル系多層重合体(A)に対するメタクリル系樹脂(B)の質量比が10/90~50/50であり、
架橋弾性体の層が、架橋ゴム重合体(II)からなる中間層と、架橋重合体(I)からなり且つ中間層に接して覆われた内層とを有し、
架橋重合体(I)が、メタクリル酸メチルに由来する構造単位40~98.5質量%、メタクリル酸メチル以外の単官能単量体に由来する構造単位1~59.5質量%、および多官能単量体に由来する構造単位0.05~0.4質量%からなり、
架橋ゴム重合体(II)が、炭素原子数1~8のアルキル基を有するアクリル酸アルキルエステルに由来する構造単位90~98.9質量%、アクリル酸アルキルエステル以外の単官能単量体に由来する構造単位0.1~8.3質量%、および多官能単量体に由来する構造単位1~1.7質量%からなり、
熱可塑性重合体(III)が、炭素原子数1~8のアルキル基を有するメタクリル酸アルキルエステルに由来する構造単位80~100質量%、および該メタクリル酸アルキルエステル以外の単官能単量体に由来する構造単位0~20質量%からなり、
架橋弾性体の層の平均直径が120nm以下であり、
架橋ゴム重合体(II)の量が架橋重合体(I)および架橋ゴム重合体(II)の合計量に対して80~90質量%であり、且つ
アセトン不溶分の質量がフィルムの質量に対して35~55質量%である、
フィルム。
〔3〕 一軸伸長粘度測定にて計測される、測定時間t(単位:秒またはs)と一軸伸長粘度η(単位:Pa・s)との関係を、測定開始から0.03秒間経過した時から測定開始から0.1秒間経過した時までの範囲について、最小二乗法により一次関数η=at+bで近似したときの傾きaが1.0×104Pa以上である、〔1〕に記載のフィルム。
〔4〕 ブラックパネル温度83℃、相対湿度50%、および照射エネルギー100mW/cm2の条件で紫外線を500時間照射した後に計測された波長350nm透過率が5%以下である、〔1〕に記載のフィルム。
〔6〕 つや消し剤をさらに含有してなる、〔1〕~〔5〕のいずれかひとつに記載のフィルム。
〔8〕 前記〔1〕~〔7〕のいずれかひとつに記載のフィルムと他の熱可塑性樹脂フィルムとを積層して有する、フィルム。
〔9〕 加飾用である、〔1〕~〔8〕のいずれかひとつに記載のフィルム。
〔10〕 建材用である、〔1〕~〔9〕のいずれかひとつに記載のフィルム。
本発明のアクリル系樹脂フィルムにおいては、添加された紫外線吸収剤の分解が抑制されるので、耐候性を高めるために必要な紫外線吸収剤の量が少なくて済む。本発明のアクリル系樹脂フィルムは、印刷、積層、接着などの加工に対する耐性が高い。本発明のひずみ硬化性が高いアクリル系樹脂フィルムは、成形および加工の速度を高めても、良好な成形および加工ができる。
メタクリル酸C1-8アルキルエステル以外の単官能単量体としては、アクリル酸メチル、アクリル酸エチル、アクリル酸ブチル、アクリル酸2-エチルヘキシル、アクリル酸プロピルなどのアクリル酸エステル;スチレン、p-メチルスチレン、α-メチルスチレンなどの芳香族ビニル化合物;N-プロピルマレイミド、N-シクロヘキシルマレイミド、N-o-クロロフェニルマレイミドなどのマレイミド化合物を挙げることができる。これらのうち、アクリル酸アルキルエステルが好ましく、アクリル酸C1-8アルキルエステルがより好ましく、アクリル酸ブチルがさらに好ましい。
架橋重合体(I)および架橋ゴム重合体(II)の合計量は、アクリル系多層重合体(A)の量に対して、好ましくは30~40質量%、より好ましくは32~38質量%、さらに好ましくは34~36質量%である。
メタクリル酸メチル以外の単官能単量体としては、メタクリル酸エチル、メタクリル酸ブチル、メタクリル酸シクロヘキシルなどのメタクリル酸メチル以外のメタクリル酸エステル;アクリル酸メチル、アクリル酸エチル、アクリル酸ブチル、アクリル酸2-エチルヘキシル、アクリル酸プロピルなどのアクリル酸エステル;スチレン、p-メチルスチレン、α-メチルスチレンなどの芳香族ビニル化合物;N-プロピルマレイミド、N-シクロヘキシルマレイミド、N-o-クロロフェニルマレイミドなどのマレイミド化合物を挙げることができる。これらのうち、アクリル酸アルキルエステルが好ましく、アクリル酸C1-8アルキルエステルがより好ましく、アクリル酸ブチルがさらに好ましい。
多官能単量体としては、エチレングリコールジメタクリレート、プロピレングリコールジメタクリレート、トリエチレングリコールジメタクリレート、ヘキサンジオールジメタクリレート、エチレングリコールジアクリレート、プロピレングリコールジアクリレート、トリエチレングリコールジアクリレート、アリルメタクリレート、トリアリルイソシアヌレートなどを挙げることができる。
アクリル酸アルキルエステル以外の単官能単量体としては、例えば、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ブチル、メタクリル酸シクロヘキシルなどのメタクリル酸エステル;スチレン、p-メチルスチレン、α-メチルスチレンなどの芳香族ビニル化合物;N-プロピルマレイミド、N-シクロヘキシルマレイミド、N-o-クロロフェニルマレイミドなどのマレイミド化合物;1,3-ブタジエン、イソプレンなどの共役ジエンを挙げることができる。これらのうち、メタクリル酸アルキルエステルが好ましく、メタクリル酸C1-8アルキルエステルがより好ましく、メタクリル酸メチルがさらに好ましい。
多官能単量体としては、エチレングリコールジメタクリレート、プロピレングリコールジメタクリレート、トリエチレングリコールジメタクリレート、ヘキサンジオールジメタクリレート、エチレングリコールジアクリレート、プロピレングリコールジアクリレート、トリエチレングリコールジアクリレート、アリルメタクリレート、トリアリルイソシアヌレートなどを挙げることができる。
グラフト率=100×〔w1-w0×R〕/〔w0×R〕
乳化重合による場合は、例えば、架橋重合体(I)を構成するための単量体(i)を乳化重合して架橋重合体(I)を含有するラテックスを得、これに架橋ゴム重合体(II)を構成するための単量体(ii)を添加して、単量体(ii)をシード乳化重合して架橋重合体(I)と架橋ゴム重合体(II)を含有するラテックスを得、これに熱可塑性重合体(III)を構成するための単量体(iii)を加えて、単量体(iii)をシード乳化重合してアクリル系多層重合体を含有するラテックスを得ることができる。なお、乳化重合は重合体を含有するラテックスを得るために用いられる公知の方法である。シード乳化重合はシード粒子の表面で単量体の重合反応を行わせる方法である。シード乳化重合はコアシェル構造重合体粒子を得るために好ましく用いられる。
ラテックスに含まれるアクリル系多層重合体(A)の平均粒子径は、次のようにして決定できる。アクリル系多層重合体(A)を含むラテックスを0.05質量%の濃度になるようイオン交換水で希釈し、得られた希釈液を支持板に薄く流延し、乾燥させる。乾燥物に金-パラジウム合金を蒸着させ、それを走査型透過電子顕微鏡(日本電子製、JSM7600F)で観察し、数平均粒子径を決定する。
アクリル系多層重合体(A)に対するメタクリル系樹脂(B)の質量比が、10/90~50/50、好ましくは15/85~35/65、より好ましくは18/82~32/68である。
2-(2-ヒドロキシフェニル)-1,3,5-トリアジン、
2,4,6-トリス(2-ヒドロキシ-4-オクチルオキシフェニル)-1,3,5-トリアジン、
2,4,6-トリス(2-ヒドロキシ-4-ヘキシルオキシ-3-メチルフェニル)-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-オクチルオキシフェニル)-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-(2,4-ジヒドロキシフェニル)-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2,4-ビス(2-ヒドロキシ-4-プロピルオキシフェニル)-6-(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-オクチルオキシフェニル)-4,6-ビス(4-メチルフェニル)-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-ドデシルオキシフェニル)-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-トリデシルオキシフェニル)-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-[2-ヒドロキシ-4-(2-ヒドロキシ-3-ブチルオキシ-プロポキシ)フェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-[2-ヒドロキシ-4-(2-ヒドロキシ-3-オクチルオキシ-プロピルオキシ)フェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-[4-(ドデシルオキシ/トリデシルオキシ-2-ヒドロキシプロポキシ)-2-ヒドロキシ-フェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-[2-ヒドロキシ-4-(2-ヒドロキシ-3-ドデシルオキシ-プロポキシ)フェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-ヘキシルオキシフェニル)-4,6-ジフェニル-1,3,5-トリアジン、
2-(2-ヒドロキシ-4-メトキシフェニル)-4,6-ジフェニル-1,3,5-トリアジン、
2,4,6-トリス[2-ヒドロキシ-4-(3-ブトキシ-2-ヒドロキシ-プロポキシ)フェニル]-1,3,5-トリアジン、
2-(2-ヒドロキシフェニル)-4-(4-メトキシフェニル)-6-フェニル-1,3,5-トリアジン、
2-{2-ヒドロキシ-4-[3-(2-エチルヘキシル-1-オキシ)-2-ヒドロキシプロピルオキシ]フェニル}-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、
2-[4,6-ビス(1,1’-ビフェニル-4-イル)-1,3,5-トリアジン-2-イル]-5-[(2‐エチルヘキシル)オキシ]フェノール、
2,4-ビス(2-ヒドロキシ-4-ブトキシフェニル)-6-(2,4-ビス(ブトキシフェニル)-1,3,5-トリアジン、
2-[4-(4,6-ビス(ビフェニル-4-イル)-[1,3,5]トリアジン-2-イル)-3-ヒドロキシ-フェノキシ)-プロピオン酸6-メチルへプチルエステル、
5-[2-ヒドロキシ-3-(ドデシルオキシ)プロポキシ]-2-(4-(4,6-ビス(2,4-ジメチルフェニル)-[1,3,5]トリアジン-2-イル)フェノール、
5-[2-ヒドロキシ-3-(トリデシルオキシ)プロポキシ]-2-(4-(4,6-ビス(2,4-ジメチルフェニル)-[1,3,5]トリアジン-2-イル)フェノール、
5-[2-ヒドロキシ-3-(2-エチルヘキシルオキシ)プロポキシ]-2-(4-(4,6-ビス(2,4-ジメチルフェニル)-[1,3,5]トリアジン-2-イル)フェノール、
2-[4-(4,6-ビス{2-ヒドロキシ-4[1-(6-メチル-へプチルオキシカルボニル)-エトキシ]-フェニル}-[1,3,5]トリアジン-2-イル)-3-ヒドロキシ-フェノキシ]-プロピオン酸6-メチルへプチルエステル
などを挙げることができる。
アクリル系樹脂フィルムに配合される光拡散剤または艶消し剤は、アクリル系樹脂フィルムの厚さに対して、平均粒径が、好ましくは67%以下、より好ましくは40%以下、さらに好ましくは13%以下であることが好ましい。
ヒンダードフェノール系酸化防止剤としては、ペンタエリスリチル-テトラキス〔3-(3,5-ジt-ブチル-4-ヒドロキシフェニル)プロピオネート〕(BASF社製;商品名IRGANOX1010)、およびオクタデシル-3-(3,5-ジt-ブチル-4-ヒドロキシフェニル)プロピオネート(BASF社製;商品名IRGANOX1076)等が好ましい。
リン-ヒンダードフェノール系酸化防止剤としては、6-[3-(3-t-ブチル-4-ヒドロキシ-5-メチル)プロポキシ]-2,4,8,10-テトラ-t-ブチルジベンズ[d,f][1,3,2]-ジオキサスホスフェピン(住友化学工業社製;商品名:Sumilizer GP)等が好ましい。これらの酸化防止剤は1種を単独でまたは2種以上を組み合わせて用いることができる。
蛍光体としては、蛍光顔料、蛍光染料、蛍光白色染料、蛍光増白剤、および蛍光漂白剤等が挙げられる。これらは1種を単独でまたは2種以上を組み合わせて用いることができる。
本発明のアクリル系樹脂フィルムは紫外線吸収剤などの添加剤のブリードアウトが発生しにくい。本発明のアクリル系樹脂フィルムは、薄い厚さにおいても厚さムラが小さい。また本発明のアクリル系樹脂フィルムは、耐応力白化性に優れ、折り曲げても白化しない。
(加工性)
樹脂フィルム(厚さ200μm)を、引張試験における引張方向がMD方向と平行になるように、打ち抜いて、JIS K 7127(ISO572-3)のタイプ1Bの試験片を得た。該試験片を200mm/分で引張り、破断伸び(EL)を測定した。なお、破断伸び(EL)は、試験片装着時のチャック間距離l0に対する破断直前のチャック間距離lの増加量l-l0の比:(l-l0)/l×100で表す。破断伸びが大きいほど成形性が良好であることを示す。本発明においては当該破断伸びが50%以上であることが好ましい。
樹脂フィルム(厚さ200μm)を裁断して18mm×10mmの試験片を得た。回転型レオメーター(TAインストルメント社製 DHR)を用いて、200℃(待機時間30秒間)、歪み速度6.0s-1の条件で、試験片を伸長変形させ、各時間tにおける試験片の断面積と荷重とを測定し、その測定値から一軸伸長粘度を算出した。なお、試験片の断面積S(t)は、初期断面積S0と歪み速度εとから、式:S0×exp(-εt)で算出することもできる。
測定開始から0.03秒間経過した時から、測定開始から0.1秒間経過したときまでの範囲における、時間t(単位:秒またはs)と一軸伸長粘度η(単位:Pa・s)との一組のデータを、最小二乗法によって一次関数η=at+bに近似し、その一次関数の傾きa(ひずみ硬化性)を算出した。ひずみ硬化性が大きいほど成形性が良好であることを示す。本発明においては当該傾きが1.0×104Pa以上であることが好ましい。
樹脂フィルムを裁断して50mm×50mmの試験片を得た。スーパーUV試験機(岩崎電気社製;SUV-W161)を用いて、試験片に、ブラックパネル温度83℃、相対湿度50%、照射エネルギー100mW/cm2の条件で、紫外線を500時間照射した。その後、試験片を試験機から取り出し、分光光度計(島津製作所社製 UV3600)にて200~800nmの波長範囲における透過率を測定した。波長350nmの透過率が低いほど耐候性が良好であることを示す。本発明においては当該透過率が5%以下であることが好ましい。
所定量のアクリル系樹脂フィルムをアセトンに一晩漬けて溶液を得た。溶液を遠心分離してアセトン不溶分とアセトン可溶分とに分けた。分離されたアセトン不溶分をアセトン洗浄し、次いでアセトンを室温下にて蒸散させて、乾燥アセトン不溶分を得、それの質量を測定した。
攪拌機、温度計、窒素ガス導入管、単量体導入管および還流冷却器を具備した反応器に、脱イオン水1050部、ドデシルベンゼンスルホン酸ナトリウム1部および炭酸ナトリウム0.05部を仕込み、反応器内を窒素ガスで十分に置換して実質的に酸素がない状態にした。反応器内の温度を80℃にした。それに、過硫酸カリウム3%水溶液0.1部を投入し、5分間攪拌した。その後、メタクリル酸メチル(MMA)49.9%、アクリル酸ブチル(BA)49.9%、およびメタクリル酸アリル(ALMA)0.2%からなる混合物(i)26.2部を20分間かけて連続的に添加した。添加終了後、重合率が98%以上になるように、少なくとも30分間重合反応さらに行った。
混合物(ii)において、MMAの量を4.9%に、BAの量を92.2%に、ALMAの量を2.9%にそれぞれ変えた以外は製造例1と同じ方法でアクリル系多層重合体(A2)の粉末を得た。この粉末をペレット化した。
混合物(ii)において、MMAの量を5%に、BAの量を94.4%に、ALMAの量を0.6%にそれぞれ変えた以外は製造例1と同じ方法でアクリル系多層重合体(A3)の粉末を得た。この粉末をペレット化した。
アクリル系多層重合体(A1)のペレット80部、メタクリル系樹脂(B1)(MMA由来構造単位100%、重量平均分子量8.0万)20部、2-[4,6-ビス(1,1’-ビフェニル-4-イル)-1,3,5-トリアジン-2-イル]-5-[(2‐エチルヘキシル)オキシ]フェノール(BASF社製;商品名Tinuvin1600)(下式X1)1部を、二軸押出機を用いて混練し、ペレタイザ-を用いてペレット化して、熱可塑性樹脂 (R1)を得た。
得られた樹脂フィルム(1)について、各種評価を行った。評価結果を表1に示す。樹脂
フィルム(1)は、加工性、成形性および耐候性に優れていた。
2-[4,6-ビス(1,1’-ビフェニル-4-イル)-1,3,5-トリアジン-2-イル]-5-[(2‐エチルヘキシル)オキシ]フェノールを、2,4,6-トリス(2-ヒドロキシ-4-ヘキシルオキシ-3-メチルフェニル)-1,3,5-トリアジン(ADEKA社製;商品名アデカスタブLA-F70)(下式X2)に変えた以外は実施例1と同じ方法で樹脂フィルム(2)を得た。評価結果を表1に示す。樹脂フィルム(2)は、加工性、成形性および耐候性に優れていた。
アクリル系多層重合体(A1)のペレットの量を70部に変え、メタクリル系樹脂(B1)の量を30部に変えた以外は実施例1と同じ方法で樹脂フィルム(3)を得た。評価結果を表1に示す。樹脂フィルム(3)は、加工性、成形性および耐候性に優れていた。
メタクリル系樹脂(B1)をメタクリル系樹脂(B2)(MMA由来構造単位100%、重量平均分子量11.0万)に変えた以外は実施例3と同じ方法で樹脂フィルム(4)を得た。評価結果を表1に示す。樹脂フィルム(4)は、加工性、成形性および耐候性に優れていた。
アクリル系多層重合体(A1)をアクリル系多層重合体(A2)に変えた以外は実施例3と同じ方法で樹脂フィルム(5)を得た。評価結果を表1に示す。樹脂フィルム(5)は、加工性が劣り、加工時に破断しやすいことが予測された。
アクリル系多層重合体(A1)のペレットの量を100部に変え、メタクリル系樹脂(B1)の量を0部に変えた以外は実施例1と同じ方法で樹脂フィルム(6)を得た。評価結果を表1に示す。樹脂フィルム(6)はひずみ硬化性が低く、成形時に破断しやすいことが予測された。
メタクリル系樹脂(B1)をメタクリル系樹脂(B3)(MMA由来構造単位94%、アクリル酸メチル由来構造単位6%、重量平均分子量12.0万)に変えた以外は実施例1と同じ方法で樹脂フィルム(7)を得た。評価結果を表1に示す。樹脂フィルム(7)は、耐候性が劣っていた。
2-[4,6-ビス(1,1’-ビフェニル-4-イル)-1,3,5-トリアジン-2-イル]-5-[(2‐エチルヘキシル)オキシ]フェノールを2,2’-メチレンビス[6-(2H-ベンゾトリアゾール-2-イル)-4-t-オクチルフェノール](ADEKA社製;商品名アデカスタブLA-31RG)(下式X3)に変えた以外は実施例1と同じ方法で樹脂フィルム(8)を得た。評価結果を表1に示す。樹脂フィルム(8)は、耐候性が劣っていた。
アクリル系多層重合体(A1)をアクリル系多層重合体(A3)に変えた以外は実施例3と同じ方法で樹脂フィルム(9)を得た。評価結果を表1に示す。樹脂フィルム(9)は、加工性が劣り、加工時に破断しやすいことが予測された。
Claims (10)
- 熱可塑性重合体(III)からなる外層および該外層に接して覆われた架橋弾性体の層からなるアクリル系多層重合体(A)と、
99質量%以上のメタクリル酸メチル単位を含み且つ重量平均分子量が50000以上200000以下であるメタクリル系樹脂(B)と、
ヒドロキシフェニルトリアジン骨格を有する紫外線吸収剤(C)とを含有して成り、
紫外線吸収剤(C)の量がアクリル系多層重合体(A)とメタクリル系樹脂(B)との合計量に対して0.1~1.5質量%であり、
アクリル系多層重合体(A)に対するメタクリル系樹脂(B)の質量比が10/90~50/50であり、
架橋弾性体の層が、架橋ゴム重合体(II)からなる中間層と、架橋重合体(I)からなり且つ中間層に接して覆われた内層とを有し、
架橋重合体(I)が、メタクリル酸メチルに由来する構造単位40~98.5質量%、メタクリル酸メチル以外の単官能単量体に由来する構造単位1~59.5質量%、および多官能単量体に由来する構造単位0.05~0.4質量%からなり、
架橋ゴム重合体(II)が、炭素原子数1~8のアルキル基を有するアクリル酸アルキルエステルに由来する構造単位90~98.9質量%、アクリル酸アルキルエステル以外の単官能単量体に由来する構造単位0.1~8.3質量%、および多官能単量体に由来する構造単位1~1.7質量%からなり、
熱可塑性重合体(III)が、炭素原子数1~8のアルキル基を有するメタクリル酸アルキルエステルに由来する構造単位80~100質量%、および該メタクリル酸アルキルエステル以外の単官能単量体に由来する構造単位0~20質量%からなり、
架橋弾性体の層の平均直径が120nm以下であり、
架橋ゴム重合体(II)の量が架橋重合体(I)および架橋ゴム重合体(II)の合計量に対して80~90質量%であり、且つ
アセトン不溶分の質量がフィルムの質量に対して35~55質量%である、
フィルム。 - 引張試験における破断伸び(EL)がMD方向について50%以上である、請求項1に記載のフィルム。
- 一軸伸長粘度測定にて計測される、測定時間(秒)と一軸伸長粘度(Pa・s)との関係を、測定開始から0.03秒間経過時から測定開始から0.1秒間経過時までの範囲について、最小二乗法による一次関数で近似したときの傾きが1.0×104Pa以上である、請求項1に記載のフィルム。
- ブラックパネル温度83℃、相対湿度50%、照射エネルギー100mW/cm2の条件で紫外線を500時間照射した後に計測された波長350nm透過率が5%以下である、請求項1に記載のフィルム。
- フィルム厚が20μm以上100μm以下である、請求項1に記載のフィルム。
- つや消し剤をさらに含有してなる、請求項1~5のいずれかひとつに記載のフィルム。
- 請求項1~6のいずれかひとつに記載のフィルムと機能層とを積層して有する、フィルム。
- 請求項1~7のいずれかひとつに記載のフィルムと他の熱可塑性樹脂フィルムとを積層して有する、フィルム。
- 加飾用である、請求項1~8のいずれかひとつに記載のフィルム。
- 建材用である、請求項1~9のいずれかひとつに記載のフィルム。
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| KR1020217009358A KR102795845B1 (ko) | 2018-10-04 | 2019-10-03 | 아크릴계 수지 필름 |
| CN201980065760.1A CN112823183B (zh) | 2018-10-04 | 2019-10-03 | 丙烯酸类树脂膜 |
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| JPWO2020071477A1 (ja) | 2021-09-24 |
| KR102795845B1 (ko) | 2025-04-14 |
| CN112823183B (zh) | 2023-05-09 |
| EP3862382A1 (en) | 2021-08-11 |
| KR20210068433A (ko) | 2021-06-09 |
| EP3862382A4 (en) | 2022-06-29 |
| CN112823183A (zh) | 2021-05-18 |
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