WO2015133153A1 - メタクリル系樹脂組成物 - Google Patents
メタクリル系樹脂組成物 Download PDFInfo
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- WO2015133153A1 WO2015133153A1 PCT/JP2015/001240 JP2015001240W WO2015133153A1 WO 2015133153 A1 WO2015133153 A1 WO 2015133153A1 JP 2015001240 W JP2015001240 W JP 2015001240W WO 2015133153 A1 WO2015133153 A1 WO 2015133153A1
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- resin composition
- acrylic
- methacrylic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2451/00—Decorative or ornamental articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Definitions
- the present invention relates to a methacrylic resin composition and a film comprising the same.
- Acrylic resin is excellent in transparency, weather resistance, and design, but has a problem of brittleness because it is easily broken.
- An acrylic resin containing an acrylic ester-based crosslinked elastic body overcomes brittleness by imparting elasticity, and is used by being laminated (laminated) with various materials such as plastic, wood, and metal.
- the present invention provides a methacrylic resin composition capable of forming a film excellent in both delamination resistance and warm water whitening resistance, transparency, folding cracking (whitening) resistance, and film appearance. With the goal.
- the inventors have found that an excellent film can be obtained, and have reached the present invention.
- the methacrylic resin composition of the present invention may contain a methacrylic polymer (B).
- the methacrylic resin composition of the present invention may contain an ultraviolet absorber.
- the film of the present invention may be formed by molding the methacrylic resin composition of the present invention.
- the laminate of the present invention may include the film of the present invention.
- the methacrylic resin composition of the present invention it is possible to obtain a film having both delamination resistance and hot water whitening resistance, and excellent heat shrink resistance, transparency, bending cracking (whitening) resistance, and appearance. it can.
- the methacrylic resin composition of the present invention contains an acrylic graft copolymer (A) containing an acrylic ester rubbery polymer (Aa).
- the acrylic graft copolymer (A) used in the present invention is a monomer mixture (Ab) mainly composed of a methacrylic acid ester in the presence of an acrylic ester rubbery polymer (Aa). It is obtained by polymerizing. At this time, the monomer mixture (Ab) containing methacrylic acid ester as a main component does not undergo a graft reaction with the acrylate rubber-based polymer (Aa), and becomes a non-grafted polymer. (Free polymer) may occur. The acrylic graft copolymer may contain this free polymer.
- the acrylic ester rubbery polymer (Aa) used in the present invention comprises a monomer comprising 60 to 100% by weight of an acrylic ester and 0 to 40% by weight of another copolymerizable vinyl monomer. It is preferred to polymerize the monomer mixture (total 100% by weight) and a specific amount of copolymerizable crosslinker.
- the monomer mixture and the crosslinking agent may be used by mixing them all at once, or may be used in two or more stages by changing the composition of the monomer mixture and the crosslinking agent (that is, two or more stages). May be carried out).
- the acrylic ester rubbery polymer (AA) may contain a methacrylic ester polymer.
- acrylic ester in the acrylic ester rubbery polymer (Aa) those having 1 to 12 carbon atoms in the alkyl group can be used from the viewpoint of polymerizability and cost. Specific examples thereof include, for example, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, and the like. These monomers are used alone. You may use 2 or more types together.
- the amount of acrylic ester in the acrylic ester rubbery polymer (Aa) is preferably 60 to 100% by weight, more preferably 70 to 100% by weight, and more preferably 80 to 100% by weight in 100% by weight of the monomer mixture. Is most preferred.
- the amount of the acrylate ester is less than 60% by weight, the impact resistance is lowered, the elongation at the time of tensile breakage is lowered, and cracks tend to be generated at the time of film cutting.
- Methacrylic acid esters can be used as other vinyl monomers copolymerizable in the acrylic ester rubbery polymer (Aa).
- the methacrylic acid ester those in which the alkyl group has 1 to 12 carbon atoms are preferable, and the alkyl group may be linear or branched. Examples thereof include methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate and the like.
- vinyl halides such as vinyl chloride and vinyl bromide
- vinyl cyanides such as acrylonitrile and methacrylonitrile
- vinyl esters such as vinyl formate, vinyl acetate and vinyl propionate
- styrene vinyl toluene, ⁇ -methyl styrene, etc.
- Aromatic vinyl derivatives vinylidene halides such as vinylidene chloride and vinylidene fluoride, acrylic acid and its salts such as acrylic acid, sodium acrylate, calcium acrylate, ⁇ -hydroxyethyl acrylate, dimethylaminoethyl acrylate, acrylic acid
- Acrylic acid alkyl ester derivatives such as glycidyl, acrylamide, N-methylol acrylamide, methacrylic acid and its salts such as methacrylic acid, sodium methacrylate, calcium methacrylate, methacrylamide, ⁇ -methacrylic acid Rokishiechiru, dimethylaminoethyl methacrylate and methacrylic acid alkyl ester derivative of glycidyl methacrylate and the like, these monomers singly or two or more may be used in combination.
- methacrylic acid esters are particularly preferable from the viewpoint of weather resistance and transparency.
- the amount of the other vinyl monomer copolymerizable in the acrylate rubber polymer (Aa) is preferably 0 to 40% by weight, preferably 0 to 30% by weight based on 100% by weight of the monomer mixture. % Is more preferable, and 0 to 20% by weight is most preferable. If the amount of the other vinyl monomer exceeds 40% by weight, the elastic properties of the acrylic ester rubber-like polymer are lowered, so that the impact resistance is lowered, the elongation at the time of tensile break is lowered, and the film is cut. Sometimes cracks are likely to occur.
- the amount of the copolymerizable cross-linking agent in the acrylate rubber-based polymer (Aa) is determined by the average particle size of the acrylate rubber-based polymer, hot water whitening resistance, stress whitening, and elongation at tensile rupture. Or it greatly affects transparency. That is, the average particle diameter d (nm) of the acrylic ester rubber-like polymer and the amount w (% by weight) of the crosslinking agent in the total acrylic ester rubber-like polymer (A) during the polymerization satisfy the following formula. This is very important. 0.02d ⁇ w ⁇ 0.05d
- the average particle diameter of the acrylic ester rubbery polymer (Aa) is 50 to 200 nm, preferably 50 to 160 nm, more preferably 50 to 120 nm, and most preferably 60 to 120 nm.
- the average particle diameter of the acrylic ester rubbery polymer is less than 50 nm, impact resistance and the like are lowered, elongation at the time of tensile breakage is lowered, and cracks tend to be generated at the time of film cutting.
- it exceeds 200 nm stress whitening tends to occur, the transparency is lowered, and the transparency after vacuum forming tends to be lowered.
- the amount of the crosslinking agent is preferably in the range represented by the above formula 0.02d ⁇ w ⁇ 0.05d, more preferably 0.023d ⁇ w ⁇ 0.047d, and 0.025d ⁇ w ⁇ 0.045d. It is more preferable to satisfy.
- the amount of the crosslinking agent w is less than 0.02d or more than 0.05d, warm water whitening and stress whitening occur, impact resistance and transparency decrease, elongation at the time of tensile breakage decreases, and film Cracks tend to occur during cutting, and the film formability tends to deteriorate.
- the crosslinking agent may be a commonly used one, and examples thereof include polyfunctional monomers having two or more non-conjugated double bonds per molecule.
- These crosslinking agents may be used alone or in combination of two or more.
- the acrylic graft copolymer (A) used in the present invention is a monomer having a methacrylic acid ester as a main component in the presence of the acrylic ester rubber-like polymer (Aa). It is obtained by polymerizing the body mixture (Ab). Preferably, 95 to 25 parts by weight of a monomer mixture (Ab) mainly composed of a methacrylic acid ester is added in the presence of 5 to 75 parts by weight of the acrylic ester rubbery polymer (Aa). It can be obtained by polymerizing in at least one stage.
- the methacrylic acid ester in the monomer mixture (Ab) mainly composed of methacrylic acid ester is preferably 80% by weight or more, more preferably 85% by weight, and further preferably 90% by weight. If the methacrylic acid ester is less than 80% by weight, the hardness and rigidity of the resulting film tend to decrease.
- the methacrylic acid ester the methacrylic acid ester of the acrylic acid ester-based rubbery polymer (Aa) described above can be similarly used.
- the acrylic acid ester mentioned in the monomer mixture of the above-mentioned acrylic acid ester rubber-like polymer (Aa), and other possible copolymers These vinyl monomers can be used. From the viewpoints of transparency, hardness and heat resistance, methacrylic acid esters are preferred.
- the graft ratio of the acrylic graft copolymer (A) is the acrylic ester rubber-like polymer (Aa) when the weight of the acrylic ester rubber-like polymer (AA) is 100. Is an index representing the weight ratio of the monomer mixture (Ab) graft-bonded to.
- the graft ratio of the acrylic graft copolymer (A) is 60 to 105%, more preferably 65 to 100%, and most preferably 70 to 95%. If the graft ratio is less than 60%, the bending whitening resistance is lowered, the transparency is lowered, the elongation at the time of tensile break is lowered, and cracks tend to be generated at the time of film cutting. On the other hand, if it exceeds 105%, the delamination resistance tends to decrease.
- the reactive ultraviolet absorber is selected from an acrylic ester rubbery polymer (Aa) and / or for improving weather resistance and molding processability. Alternatively, it may be copolymerized in the polymer of the monomer mixture (Ab). That is, the reactive ultraviolet absorber may be copolymerized with the monomer mixture of the acrylate rubber polymer (Aa) and the crosslinking agent, or may be copolymerized with the monomer mixture (Ab). It may be polymerized. Among these, the ultraviolet absorber is more preferably copolymerized with both the acrylic ester rubbery polymer (Aa) and the monomer mixture (Ab) mainly composed of methacrylic ester. preferable.
- reactive ultraviolet absorber known reactive ultraviolet absorbers may be used, and are not particularly limited, but those represented by the general formula (1) are preferable from the viewpoint of molding processability and weather resistance.
- X is H or halogen
- R 1 is H, methyl or a t-alkyl group having 4 to 6 carbon atoms
- R 2 is a linear or branched alkylene group having 2 to 10 carbon atoms
- R 3 is H or methyl.
- the reactive ultraviolet absorber represented by the general formula (1) examples include 2- (2′-hydroxy-5′-methacryloyloxyethylphenyl) -2H-benzotriazoles, and 2- (2 ′ -Hydroxy-5'-acryloyloxyethylphenyl) -2H-benzotriazole, 2- (2'-hydroxy-5'-methacryloyloxyethylphenyl-2H-benzotriazole, 2- (2'-hydroxy-5'-methacryloyl) Oxyethylphenyl) -5-chloro-2H-benzotriazole, 2- (2′-hydroxy-5′-methacryloyloxypropylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-5′-methacryloyloxyethyl) -3'-t-butylphenyl) -2H-benzotriazole It is. More preferably, the cost and handleability, is 2- (2'-hydroxy-5'-methacryl
- the copolymerization ratio of the reactive ultraviolet absorber is preferably 0.01 to 30 parts by weight, more preferably 0.01 to 25 parts by weight, based on 100 parts by weight of the acrylic graft copolymer (A). It is more preferably from 01 to 20 parts by weight, particularly preferably from 0.05 to 20 parts by weight. If the copolymerization ratio of the reactive ultraviolet absorber is less than 0.01 parts by weight, the weather resistance of the film that can be formed from the resulting methacrylic resin composition tends to be reduced. There is a tendency for impact resistance and bending cracking resistance to decrease.
- the production method of the acrylic graft copolymer (A) in the present invention is not particularly limited, and a known emulsion polymerization method, emulsion-suspension polymerization method, suspension polymerization method, bulk polymerization method or solution polymerization method can be applied. However, the emulsion polymerization method is particularly preferred.
- the method of copolymerizing the reactive ultraviolet absorber in the acrylic graft copolymer (A) is not particularly limited, and it is preferable to copolymerize during the production of the acrylic graft copolymer (A). That is, it may be copolymerized with the monomer mixture and the crosslinking agent of the acrylic ester rubber-like polymer (AA) and / or with the monomer mixture.
- the copolymerization method a known emulsion polymerization method, emulsion-suspension polymerization method, suspension polymerization method, bulk polymerization method or solution polymerization method can be applied, but the emulsion polymerization method is particularly preferable.
- initiators such as organic peroxides, inorganic peroxides, and azo compounds can be used.
- organic peroxides 1,1,3,3-tetramethylbutyl hydroperoxide, succinic acid peroxide, peroxymaleic acid t-butyl ester, cumene hydroperoxide, benzoyl peroxide
- organic peroxides such as oxides, inorganic peroxides such as potassium persulfate and sodium persulfate, and oil-soluble initiators such as azobisisobutyronitrile are also used.
- These may be used alone or in combination of two or more.
- These initiators include reducing agents such as sodium sulfite, sodium thiosulfate, sodium formaldehyde sulfoxylate, ascorbic acid, hydroxyacetone acid, ferrous sulfate, ferrous sulfate and disodium ethylenediaminetetraacetate It may be used as a combined ordinary redox initiator.
- the organic peroxide can be added by a known addition method such as a method of adding to a polymerization system as it is, a method of adding a mixture to a monomer, a method of adding a dispersion in an aqueous emulsifier solution, and the like. From the viewpoint of transparency, a method of adding a mixture to a monomer or a method of adding it by dispersing in an aqueous emulsifier solution is preferable.
- the organic peroxide is an organic reducing agent such as a divalent iron salt and / or formaldehyde sulfoxylate soda and reducing sugar ascorbic acid from the viewpoint of polymerization stability and particle size control. It is preferably used as a redox initiator combined with a system reducing agent.
- the surfactant used for the emulsion polymerization is not particularly limited, and any surfactant for normal emulsion polymerization can be used.
- anionic surfactants such as sodium alkyl sulfonate, sodium alkyl benzene sulfonate, sodium dioctyl sulfosuccinate, sodium lauryl sulfate, sodium fatty acid, alkyl phenols, aliphatic alcohols and propylene oxide
- Nonionic surfactants such as reaction products with ethylene oxide are shown. These surfactants may be used alone or in combination of two or more.
- a cationic surfactant such as an alkylamine salt may be used.
- the average particle size of the obtained acrylic graft copolymer (A) in the present invention is larger than the average particle size d of the acrylate rubber polymer (Aa) and more than 100 nm and not more than 400 nm. preferable. Especially, more than 100 nm and 350 nm or less are more preferable, and more than 100 nm and 300 nm or less are more preferable.
- the average particle diameter of the acrylic graft copolymer (A) is 100 nm or less, the impact resistance and folding crack resistance of the film that can be formed from the resulting methacrylic resin composition tend to be lowered, and it exceeds 400 nm. And the transparency of the film tends to decrease.
- the resulting acrylic graft copolymer (A) latex is separated and recovered by a usual coagulation, washing and drying operation, or by a treatment such as spray drying or freeze drying.
- the methacrylic resin composition of the present invention may contain a methacrylic polymer (B).
- the methacrylic polymer (B) used in the present invention preferably contains 80% by weight or more of methacrylic acid ester, more preferably contains 85% by weight or more, and more preferably contains 90% by weight or more. Is. If the methacrylic acid ester is less than 80% by weight, the hardness and rigidity of the resulting film tend to decrease.
- Examples of the monomer other than methyl methacrylate in the methacrylic polymer (B) in the present invention include those listed as being usable for the acrylic graft copolymer (A). These monomers may be used independently and may use 2 or more types together. That is, the methacrylic polymer (B) preferably contains methacrylic acid ester and acrylic acid ester in a weight ratio of 80/20 to 100/0, more preferably 90/10 to 100/0. 95/5 to 100/0 is more preferable. If it contains 93% by weight or more of methacrylic acid ester, transparency, hardness, heat resistance and chemical resistance are good, which is preferable.
- the methacrylic polymer (B) in the present invention can be polymerize separately from the acrylic graft copolymer (A).
- the polymerization method is not particularly limited, and a known emulsion polymerization method, emulsion-suspension polymerization method, suspension polymerization method, bulk polymerization method or solution polymerization method can be applied.
- the methacrylic polymer (B) polyglutarimide, glutaric anhydride polymer, lactone cyclized methacrylic resin, polyethylene terephthalate resin, polybutylene terephthalate resin and the like may also be included.
- initiators such as organic peroxides, inorganic peroxides, and azo compounds can be used.
- organic peroxides 1,1,3,3-tetramethylbutyl hydroperoxide, succinic acid peroxide, peroxymaleic acid t-butyl ester, cumene hydroperoxide, benzoyl peroxide Oxide, lauroyl peroxide, t-butylperoxybenzoate, isopropyl-t-butylperoxycarbonate, butyl perbenzoate, 1,1-bis (alkylperoxy) 3,3,5-trimethylcyclohexane, 1,1- Organic peroxides such as bis (alkylperoxy) cyclohexane, inorganic peroxides such as potassium persulfate and sodium persulfate, and azo compounds such as azobisisobutyronitrile are examples of organic peroxides, inorganic peroxides such as potassium persulfate and sodium persulfate
- the organic peroxide can be added by a known addition method such as a method of adding to a polymerization system as it is, a method of adding a mixture to a monomer, a method of adding a dispersion in an aqueous emulsifier solution, and the like. From the viewpoint of transparency, a method of adding to a monomer is preferable.
- dispersant used in the suspension polymerization examples include dispersants generally used in suspension polymerization, for example, polymer dispersants such as polyvinyl alcohol, polyvinyl pyrrolidone, and polyacrylamide, such as calcium phosphate, hydroxyapatite, and pyrroline.
- examples include poorly water-soluble inorganic salts such as magnesium acid.
- an anionic surfactant such as ⁇ -olefin sodium sulfonate or dodecylbenzene sodium sulfonate so that the dispersion stability is increased.
- These dispersants may be added one or more times during the polymerization in order to adjust the particle diameter of the resin particles obtained.
- the methacrylic resin composition of the present invention can be obtained by individually preparing an acrylic graft copolymer (A) and a methacrylic polymer (B) by polymerization and then mixing them. Moreover, after manufacturing an acrylic graft copolymer (A) with the same reactor, the said methacrylic resin composition can also be manufactured by manufacturing a methacrylic polymer (B) continuously. In the former method of mixing, the acrylic graft copolymer (A) and the methacrylic polymer (B) may be independently, for example, in the form of latex, powder, beads or pellets.
- the content of the acrylic ester rubbery polymer (AA) in the methacrylic resin composition used in the present invention is preferably 10 to 40% by weight in 100% by weight of the methacrylic resin composition. Weight percent is more preferred.
- the content of the acrylic ester rubbery polymer (Aa) is less than 10% by weight, the elongation at the time of tensile break of the obtained film is lowered, and cracks are easily generated when the film is cut. Whitening tends to occur easily.
- it exceeds 40 weight% there exists a tendency for the hardness and rigidity of the film obtained to fall.
- the reduced viscosity of the methyl ethyl ketone-soluble component of the methacrylic resin composition used in the present invention is 0.75 to 1.3 dl / g, preferably 0.8 to 1.1 dl / g, and 0.8 to 1. 0 dl / g is more preferable. If the reduced viscosity of the methacrylic resin composition soluble in methyl ethyl ketone is less than 0.75 dl / g, the delamination resistance tends to decrease. On the other hand, when it exceeds 1.3 dl / g, there exists a tendency for the moldability of a film to fall.
- the methacrylic resin composition obtained in the present invention can be processed into various molded products by various plastic processing methods such as injection molding, extrusion molding, blow molding and compression molding.
- the methacrylic resin composition of the present invention is particularly useful as a film, and is processed satisfactorily by, for example, an ordinary melt extrusion method such as an inflation method, a T-die extrusion method, a calendar method, or a solvent casting method. .
- an ordinary melt extrusion method such as an inflation method, a T-die extrusion method, a calendar method, or a solvent casting method.
- both surfaces of the film are brought into contact with a roll or a metal belt at the same time, particularly by bringing into contact with a roll or a metal belt heated to a temperature equal to or higher than the glass transition temperature. It is also possible to obtain a better film.
- film lamination and biaxial stretching can be used to modify the film.
- thermoplastic resins may be blended as necessary, for example, polyethylene terephthalate resin, polybutylene terephthalate resin, or the like.
- the blending method is not particularly limited, and a known method can be used.
- an inorganic pigment or an organic dye is used for coloring, and an antioxidant, a heat stabilizer, an ultraviolet ray is used to further improve the stability against heat and light.
- Absorbers, UV stabilizers, etc., or antibacterial agents, deodorizers, lubricants, etc. may be added alone or in combination of two or more.
- UV absorbers are preferably used for improving weather resistance.
- examples of the UV absorber include commonly used benzotriazole UV absorbers, 2-hydroxybenzophenone UV absorbers, and salicylic acid phenyl ester UV absorbers.
- a benzotriazole ultraviolet absorber specifically, 2,2′-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol] 2- (5-methyl-2-hydroxyphenyl) -2H-benzotriazole, 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl] -2H-benzotriazole, 2- ( 3,5-di-tert-butyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5-chloro-2H-benzotriazole, 2 -(3,5-di-tert-butyl-2-
- 2-hydroxybenzophenone ultraviolet absorbers include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octyloxybenzophenone, 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxy-4. Examples include '-chlorobenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone and the like.
- salicylic acid phenyl ester ultraviolet absorbers include p-tert-butylphenyl salicylic acid ester and p-octylphenyl salicylic acid ester. These ultraviolet absorbers may be used alone or in combination of two or more.
- the blending amount is usually preferably 0.1 to 3% by weight, more preferably 0.3 to 3% by weight, based on 100% by weight of the methacrylic resin composition. It is.
- the thickness of the film obtained from the methacrylic resin composition of the present invention is preferably 10 to 300 ⁇ m, more preferably 10 to 200 ⁇ m.
- the thickness of the film is less than 10 ⁇ m, the processability of the film tends to be lowered, and when it exceeds 300 ⁇ m, the transparency of the obtained film tends to be lowered.
- the film obtained from the methacrylic resin composition of the present invention can reduce the gloss of the film surface by a known method, if necessary.
- it can be carried out by a method of kneading an inorganic filler or crosslinkable polymer particles in a methacrylic resin composition.
- the gloss of the film surface can be reduced by embossing the obtained film.
- the film obtained from the methacrylic resin composition of the present invention can be used by being laminated on a metal, plastic or the like.
- Film lamination methods include laminate molding, wet laminating after applying an adhesive to a metal plate such as a steel plate, and then drying and pasting the film on the metal plate, dry laminating, extrusion laminating, hot melt laminating, etc. can give.
- the film is placed in a mold and then placed in a mold after insert molding or laminate injection press molding in which resin is filled by injection molding, or after the film is preformed.
- In-mold molding in which resin is filled by injection molding can be used.
- the film laminate obtained from the methacrylic resin composition of the present invention is used for substitutes for coatings such as automobile interior materials and automotive exterior materials, building materials such as window frames, bathroom equipment, wallpaper, and flooring materials, especially European bay windows. It is used after being laminated to a decorative sheet. It can also be used for household goods, furniture and housings for electrical equipment, housings for OA equipment such as facsimiles, and parts for electrical or electronic devices.
- each measuring method of the physical properties measured in the following examples and comparative examples is as follows.
- Graft rate (%) ⁇ (weight of methyl ethyl ketone insoluble matter ⁇ weight of acrylate ester rubber polymer (Aa)) / weight of acrylate ester rubber polymer (Aa) ⁇ ⁇ 100
- a spectrophotometer (HITACHI) was prepared using a sample obtained by diluting the obtained acrylic ester rubbery polymer (AA) latex and acrylic graft copolymer (A) latex to a solid content concentration of 0.02%. The average particle diameter was determined from the light transmittance at a wavelength of 546 nm using a spectrophotometer U-2000).
- the transparency of the obtained film was measured by calculating haze at a temperature of 23 ° C. ⁇ 2 ° C. and a humidity of 50% ⁇ 5% according to JIS K6714.
- the obtained film and the printed PVC sheet are press-molded at 140 ° C. to create a laminate.
- the laminate was allowed to stand under conditions of humidity of 98 RH% and 70 ° C., and the peelability from the PVC sheet was evaluated over time.
- ⁇ Delamination develops in 4 days or more.
- ⁇ Delamination develops in 2-3 days.
- X Delamination develops in 1 day.
- OSA sodium dioctylsulfosuccinate
- BA butyl acrylate MMA: methyl methacrylate
- AlMA allyl methacrylate
- RUVA 2- (2'-hydroxy-5'-methacryloyloxy Ethylphenyl) -2-H-benzotriazole (manufactured by Otsuka Chemical Co., Ltd., RUVA-93)
- the obtained acrylic graft copolymer (A) latex was salted out with calcium chloride, coagulated, washed with water and dried to obtain a resin powder (1). Further, using a single-screw extruder with a 40 mm ⁇ vent (manufactured by Tabata Machinery Co., Ltd., HV-40-28), the cylinder temperature was set to 250 ° C., and melt kneading was performed to pelletize.
- Methacrylic polymer (B) As the methacrylic polymer (B), an acrylic ester copolymer (Del Powder 80N manufactured by Asahi Kasei Chemicals Corporation) produced by suspension polymerization was prepared.
- Methacrylic polymer (B) As the methacrylic polymer (B), an acrylic ester copolymer (Del Powder 60N manufactured by Asahi Kasei Chemicals Corporation) produced by suspension polymerization was prepared.
- Methacrylic polymer (B) As the methacrylic polymer (B), an MMA-EA copolymer manufactured by suspension polymerization (Sumipex EX manufactured by Sumitomo Chemical Co., Ltd.) was prepared.
- Examples 1 to 7, Comparative Examples 1 to 5 The pellets obtained in the production examples were used in combination as shown in Table 2, 2.5 parts of Tinuvin P (manufactured by Ciba Specialty Chemicals) as an ultraviolet absorber, and an antioxidant Irganox 1010 (manufactured by BASF) 0.4
- the film was extruded at a cylinder set temperature of 160 ° C. to 235 ° C. and a die temperature of 250 ° C. using a 40 mm ⁇ extruder with a T-die (manufactured by Nakamura Industries Co., Ltd., NEX04097), and a film having a thickness of 58 ⁇ m Got.
- Table 2 The properties described above were evaluated using the obtained film, and the results are shown in Table 2.
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Graft Or Block Polymers (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
アクリル酸エステル系ゴム状重合体(A-a)を含むアクリル系グラフト共重合体(A)を含有するメタクリル系樹脂組成物であって、
(1)前記アクリル酸エステル系ゴム状重合体(A-a)の含有量が10~40重量%、
(2)前記アクリル酸エステル系ゴム状重合体(A-a)の平均粒子径dが50~200nm、
(3)前記アクリル酸エステル系ゴム状重合体(A-a)の平均粒子径d(nm)と前記アクリル酸エステル系ゴム状重合体(A-a)に用いられる単量体混合物中の架橋剤の量w(重量%)との関係が次式を満たし、
0.02d≦w≦0.05d
(4)前記アクリル系グラフト共重合体(A)のグラフト率が、60~105%、および、
(5)前記メタクリル系樹脂組成物のメチルエチルケトン可溶分の還元粘度が0.75~1.3dl/gである、メタクリル系樹脂組成物に関する。
0.02d≦w≦0.05d
アクリル酸エステル系ゴム状重合体(A-a)およびアクリル系グラフト共重合体(A)のラテックスを、熱風乾燥機内にて120℃で1時間乾燥して固形成分量を求め、次式により重合転化率を算出した。
重合転化率=(固形成分量/仕込み単体量)x100
得られたアクリル系グラフト共重合体(A)1gをメチルエチルケトン40mlに溶解させ、遠心分離機(日立工機(株)製、CP60E)を用い、回転数3000rpmにて1時間遠心分離を行い、不溶分と可溶分とを分離した。得られた不溶分を、アクリル酸エステル系ゴム状重合体(A-a)およびグラフト分(A-b)として、次式によりグラフト率を算出した。
メタクリル系樹脂組成物1gをメチルエチルケトン40mlに溶解させ、遠心分離機(日立工機(株)製、CP60E)を用い、回転数3000rpmにて1時間遠心分離を行い、不溶分と可溶分とを分離した。この操作にて得られたメチルエチルケトン可溶分150mgをN,N-ジメチルホルムアミド50mlに溶解させた溶液に対して、JIS K6721に従い、還元粘度を測定した。
得られたアクリル酸エステル系ゴム状重合体(A-a)ラテックスおよびアクリル系グラフト共重合体(A)ラテックスを、固形分濃度0.02%に希釈したものを試料として、分光光度計(HITACHI製、Spectrophotometer U-2000)を用いて546nmの波長での光線透過率より、平均粒子径を求めた。
得られたフィルムの透明性は、JIS K6714に準じて、温度23℃±2℃、湿度50%±5%にてヘイズを算出することにより測定した。
得られたフィルムを1回180度折り曲げて、折り曲げ部の変化を目視し、以下のように評価した。
○:割れが認められない。
×:割れが認められる。
得られたフィルムを1回180度折り曲げて、折り曲げ部の変化を目視し、以下のように評価した。
○:折曲げ部に白化が認められない。
△:折曲げ部に白化が薄く認められる。
×:折曲げ部に濃い白化が認められる。
得られたフィルムを直径100mmの円盤状に切出し、150℃で10分間加熱後の寸法を測定し、加熱収縮率を求めた。
加熱収縮率(%)=(加熱前の寸法-加熱後の寸法)/加熱前の寸法×100
得られたフィルムを80℃のイオン交換水中に4時間浸漬し、フィルム表面に付着した水滴を取り除き、温度23℃±2℃の環境下に1時間静置した後、JIS K7136に従ってヘイズ(曇価)を測定した。浸漬前のヘイズ値に比べ、温水白化後のヘイズを比較した。ヘイズ値より温水白化の有無を評価した。
○:浸漬前のヘイズに対して500%以内
×:浸漬前のヘイズに対して500%以上
得られたフィルムと印刷PVCシートを140℃でプレス成形し、積層品を作成する。その積層品を湿度98RH%、70℃の条件下で静置し、経時でPVCシートとの剥離性について評価を行った。
○:4日以上でデラミネーションを発現する。
△:2~3日でデラミネーションを発現する。
×:1日でデラミネーションを発現する。
得られたフィルムを20cmの距離から透過で目視観察し、樹脂の流動模様(フローマーク)の発生が無く、フィッシュアイと呼ばれる欠陥数が1m2あたり500個以下であるフィルムを外観○と判断した。
OSA:ジオクチルスルフォコハク酸ナトリウム
BA:アクリル酸ブチル
MMA:メタクリル酸メチル
CHP:クメンハイドロパーオキサイド
tDM:ターシャリドデシルメルカプタン
AlMA:メタクリル酸アリル
RUVA:2-(2’-ヒドロキシ-5’-メタクリロイルオキシエチルフェニル)-2-H-ベンゾトリアゾール(大塚化学(株)製、RUVA-93)
攪拌機付き8L重合装置に、以下の物質を仕込んだ。
脱イオン水 200部
ジオクチルスルフォコハク酸ナトリウム 0.25部
ソディウムホルムアルデヒドスルフォキシレ-ト 0.15部
エチレンジアミン四酢酸-2-ナトリウム 0.001部
硫酸第一鉄 0.00025部
重合機内を窒素ガスで充分に置換し実質的に酸素のない状態とした後、内温を60℃にし、表1中に示した単量体混合物(A-a)を10部/時間の割合で連続的に添加し、添加終了後、さらに0.5時間重合を継続し、アクリル酸エステル系ゴム状重合体(A-a)ラテックスを得た。重合転化率は99.5%であった。
単量体の組成を表1のように変更した以外は、製造例1と同様に重合を行い、凝固、水洗、乾燥して樹脂粉末(2)~(12)を得、さらに溶融混練を行い、ペレット化した。
メタクリル系重合体(B)として、懸濁重合で製造されたアクリル系エステル共重合体(旭化成ケミカルズ(株)製デルパウダ80N)を用意した。
メタクリル系重合体(B)として、懸濁重合で製造されたアクリル系エステル共重合体(旭化成ケミカルズ(株)製デルパウダ60N)を用意した。
メタクリル系重合体(B)として、懸濁重合で製造されたMMA-EA共重合体(住友化学(株)製スミペックスEX)を用意した。
製造例で得られたペレットを、表2に示す通りに組み合わせて使用し、紫外線吸収剤としてチヌビンP(チバスペシャリルケミカル社製)2.5部、抗酸化剤Irganox1010(BASF製)0.4部を添加し、Tダイ付き40ミリφ押出機(ナカムラ産機(株)製、NEX040397)を用いて、シリンダ設定温度160℃~235℃およびダイス温度250℃で押出成形し、厚み58μmのフィルムを得た。得られたフィルムを用いて上述した種々の特性を評価し、その結果を表2に示す。
Claims (5)
- アクリル酸エステル系ゴム状重合体(A-a)を含むアクリル系グラフト共重合体(A)を含有するメタクリル系樹脂組成物であって、
(1)前記アクリル酸エステル系ゴム状重合体(A-a)の含有量が10~40重量%、
(2)前記アクリル酸エステル系ゴム状重合体(A-a)の平均粒子径dが50~200nm、
(3)前記アクリル酸エステル系ゴム状重合体(A-a)の平均粒子径d(nm)と前記アクリル酸エステル系ゴム状重合体(A-a)に用いられる単量体混合物中の架橋剤の量w(重量%)との関係が次式を満たし、
0.02d≦w≦0.05d
(4)前記アクリル系グラフト共重合体(A)のグラフト率が、60~105%、および、
(5)前記メタクリル系樹脂組成物のメチルエチルケトン可溶分の還元粘度が0.75~1.3dl/gである、メタクリル系樹脂組成物。 - 前記メタクリル系樹脂組成物がメタクリル系重合体(B)を含有する、請求項1に記載のメタクリル系樹脂組成物。
- 前記メタクリル系樹脂組成物が紫外線吸収剤を含有する、請求項1または2に記載のメタクリル系樹脂組成物。
- 請求項1~3のいずれか1項に記載のメタクリル系樹脂組成物を成形してなる、フィルム。
- 請求項4に記載のフィルムを含む、積層品。
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JP2016506151A JP6666835B2 (ja) | 2014-03-07 | 2015-03-06 | メタクリル系樹脂組成物 |
EP15758510.0A EP3115415B1 (en) | 2014-03-07 | 2015-03-06 | Methacrylic resin composition |
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JP5052128B2 (ja) | 2004-03-31 | 2012-10-17 | 株式会社カネカ | メタクリル系樹脂組成物、メタクリル系樹脂フィルムおよび該フィルム積層塩化ビニル系成形体 |
JP5193600B2 (ja) * | 2005-07-05 | 2013-05-08 | 株式会社カネカ | メタクリル系樹脂組成物 |
JP2009056770A (ja) * | 2007-09-03 | 2009-03-19 | Kaneka Corp | コーティング後の意匠性を改善した艶消しアクリル系樹脂フィルム |
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JP2003128734A (ja) * | 2001-10-23 | 2003-05-08 | Kanegafuchi Chem Ind Co Ltd | 低温加工特性、耐擦り傷性に優れるメタクリル系樹脂組成物 |
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JP2006008900A (ja) * | 2004-06-28 | 2006-01-12 | Kaneka Corp | アクリルフィルム |
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