TWI651333B - Resin composition and molded article thereof - Google Patents

Abstract

A resin composition comprising: 100 parts by mass of a copolymer (a), the copolymer (a) comprising a structural unit derived from an alicyclic hydrocarbon methacrylate and a structural unit derived from other monomers; a lubricant (x ) 0.001 parts by mass or more and 2 parts by mass or less, the lubricant (x) contains a higher alcohol, a hydrocarbon, a fatty acid, an aliphatic ammonium amine, and a fatty acid ester that does not include two or more hydroxyl groups in one molecule At least one selected from the group; and 0.1 mass parts or less of a lubricant (y2), the lubricant (y2) containing a fatty acid ester containing two or more hydroxyl groups in one molecule. This resin composition is melt-molded to obtain a molded product.

Description

Resin composition and molded article thereof

The present invention relates to a resin composition and a molded article thereof. Specifically, the present invention relates to a resin composition having excellent heat resistance, which is less likely to form a gel during melt molding, and a molded article thereof.

The methacrylic resin is excellent in transparency, scratch resistance, weather resistance, and the like. The methacrylic resin may contain a lubricant in order to improve releasability and the like (for example, Patent Document 1). On the other hand, in order to improve the heat resistance of a methacrylic resin, it has been proposed to include a unit derived from a (meth) acrylic alicyclic hydrocarbon ester (for example, Patent Document 2).

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Publication No. 2012-180454

[Patent Document 2] Japanese Patent Laid-Open No. 61-176901

If a heat-resistant methacrylic resin composition contains a lubricant and is melt-molded, gel formation may occur. shape. This gel may become an impurity defect of a molded product or affect the appearance of a product.

An object of the present invention is to provide a resin composition having excellent heat resistance, which is difficult to generate a gel during melt molding, and a molded product thereof.

In order to solve the above problems, the present invention including the following aspects has been completed.

[1] A resin composition containing: 100 parts by mass of a copolymer (a), the copolymer (a) comprising a structural unit derived from an alicyclic methacrylic acid ester and a structural unit derived from other monomers; lubrication Agent (x) is 0.001 parts by mass or more and 2 parts by mass or less, and the lubricant (x) is composed of a higher alcohol, a hydrocarbon, a fatty acid, a fatty acid metal salt, an aliphatic ammonium amine, and no more than two hydroxides in one molecule At least one selected from the group consisting of fatty acid esters based on bases; and 0 to 0.1 parts by mass of a lubricant (y1), the lubricant (y1) being a monoglyceride of a saturated fatty acid having 10 to 24 carbon atoms.

[2] The resin composition according to [1], wherein the content of the lubricant (y1) is 0 to 0.05 parts by mass based on 100 parts by mass of the copolymer (a).

[3] The resin composition according to [1], wherein the content of the lubricant (y1) is 0 to 0.01 parts by mass based on 100 parts by mass of the copolymer (a).

[4] A resin composition comprising: 100 parts by mass of a copolymer (a), the copolymer (a) comprising a structural unit derived from an alicyclic methacrylic acid ester and a structural unit derived from other monomers; Lubricant (x) is 0.001 parts by mass or more and 2 parts by mass or less. The lubricant (x) contains higher alcohols, hydrocarbons, fatty acids, fatty acid metal salts, aliphatic amidines, and does not contain more than two hydrogens in one molecule. At least one selected from the group consisting of fatty acid esters of oxygen; and 0 to 0.1 parts by mass of a lubricant (y2), the lubricant (y2) is a fat containing two or more hydroxyl groups in one molecule Acid ester.

[5] The resin composition according to [4], wherein the content of the lubricant (y2) is 0 to 0.05 parts by mass based on 100 parts by mass of the copolymer (a).

[6] The resin composition according to [4], wherein the content of the lubricant (y2) is 0 to 0.01 parts by mass based on 100 parts by mass of the copolymer (a).

[7] The resin composition according to any one of [1] to [6], wherein the lubricant (x) includes an aliphatic monohydric alcohol having 12 to 18 carbon atoms and a saturation of 16 to 24 carbon atoms At least one selected from the group consisting of fatty acids.

[8] The resin composition according to any one of [1] to [7], wherein the glass transition temperature is 115 ° C or higher and 150 ° C or lower.

[9] The resin composition according to any one of [1] to [8], wherein the saturated water absorption in water at 23 ° C is 0.3 to 1.8% by mass.

[10] A molded article comprising the resin composition according to any one of [1] to [9].

[11] A laminated body comprising: a film layer including the resin composition according to any one of [1] to [9]; and a film including a thermoplastic resin composition having a glass transition temperature of 130 ° C or higher and 160 ° C or lower Floor.

[12] The laminated body according to [11], wherein the glass transition temperature is 130 ° C The thermoplastic resin composition above 160 ° C. is a resin composition containing polycarbonate.

The resin composition of the present invention has excellent heat resistance and does not form a gel during melt molding. In addition, the resin composition of the present invention has good adhesion to a forming drum and a mold release property (a property of preventing adhesion and seizing on a mold surface). A molded article formed by melt-molding the resin composition of the present invention has few impurity defects and good appearance, and is therefore suitable for use in optical members and the like.

[Form of Implementing Invention]

The resin composition of the present invention includes a copolymer (a) and a lubricant (x).

The copolymer (a) includes a structural unit derived from an alicyclic hydrocarbon methacrylate and a structural unit derived from other monomers.

The alicyclic methacrylate of the copolymer (a) used in the present invention is a compound represented by the formula (I).

(In formula (I), Cy represents an alicyclic hydrocarbon group).

Examples of the alicyclic hydrocarbon methacrylate include cyclohexyl methacrylate, methylcyclohexyl methacrylate, trimethylcyclohexyl methacrylate, cyclopentyl methacrylate, and methacrylic acid. Monocyclic aliphatic hydrocarbon esters of methacrylic acid such as cyclocycloheptyl ester and capryl methacrylate; norbornyl 2-methacrylate, norbornyl 2-methyl-2-methacrylate, 2-ethyl-2 -Norbornyl methacrylate, isoamyl 2-methacrylate, iso-methyl 2-methacrylate, iso-methyl 2-ethyl-2-methacrylate, cyclamate [5.2.1.0 ^2,6 ] dec-8-yl ester, 8-methyl-methacrylic acid reference ring [5.2.1.0 ^2,6 ] dec-8-yl ester, 8-ethyl-methacrylic acid reference ring [5.2.1.0 ^2,6 ] Dec-8-yl ester, Adamantane 2-methacrylate, Adamantane 2-methyl-2-methacrylate, Adamantane 2-ethyl-2-methacrylate Methacrylic acid polycyclic ring such as esters, adamantane 1-methacrylate, 2-methyl methacrylate, 2-methyl-2-methacrylate, 2-ethyl-2-methacrylate, etc. Aliphatic hydrocarbon ester. Among these compounds, polycyclic aliphatic hydrocarbon methacrylates are preferred, and cyclic [5.2.1.0 ^2,6 ] dec-8-yl methacrylate (alias: dicyclopentyl methacrylate) is more preferred. ester).

In the copolymer (a) used in the present invention, the content rate of the structural unit derived from the alicyclic hydrocarbon methacrylate is preferably 10 to 60% by mass, more preferably 20 to 50% by mass, and even more preferably 30 to 40. quality%. If it is smaller than the above range, the heat resistance of the resin composition may be poor. If it is more than the above range, the impact resistance of the resin composition may be poor.

The other monomers constituting the copolymer (a) used in the present invention are not particularly limited as long as they are copolymerizable with the alicyclic hydrocarbon methacrylate. Examples of the other monomer include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, second butyl acrylate, third butyl acrylate, and pentyl acrylate. Ester, isoamyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, pentadecyl acrylate, dodecyl acrylate, cyclohexyl acrylate, acrylic acid Acrylates such as allyl acrylate, borneyl acrylate, benzyl acrylate, phenoxyethyl acrylate, 2-hydroxyethyl acrylate, 2-ethoxyethyl acrylate, propylene acrylate, allyl acrylate, phenyl acrylate, etc .; Methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, second butyl methacrylate, methyl Tertiary butyl acrylate, amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, pentadecyl methacrylate, dodecyl methacrylate, methyl formate Alkyl methacrylates such as phenyl acrylate; unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, maleic acid, itaconic acid; ethylene, propylene, 1-butene, isobutylene, 1-octene, etc. Olefins; conjugated dienes such as butadiene, isoprene, myrcene; aromatic vinyl compounds such as styrene, α-methylstyrene, p-methylstyrene, and m-methylstyrene; acrylamide, Methacrylamide, acrylonitrile, methacrylonitrile, ethyl Acid vinyl ester, vinylpyridine, ketene, vinyl chloride, vinylidene chloride, vinylidene fluoride and the like. Among these other monomers, a combination of methyl methacrylate and acrylate is preferred, and a combination of methyl methacrylate and methyl acrylate is preferred.

For the copolymer (a) suitable for use in the present invention, the content rate of the structural unit derived from methyl methacrylate is preferably 40 to 90% by mass, more preferably 50 to 80% by mass, and even more preferably 60 to 70% by mass. %. When the content rate of the structural unit derived from methyl methacrylate is smaller than the aforementioned range, the transparency, abrasion resistance, and weather resistance of the resin composition may be poor. When the content rate of the structural unit derived from methyl methacrylate is larger than the aforementioned range, the heat resistance of the resin composition may be poor.

The content rate of the structural units derived from monomers other than the alicyclic hydrocarbon methacrylate and methyl methacrylate is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 2% by mass. %the following.

The glass transition temperature of the copolymer (a) used in the present invention is preferably 115 ° C to 150 ° C, more preferably 130 ° C to 150 ° C, and even more preferably 140 ° C to 150 ° C. If the glass transition temperature of the copolymer (a) is within the aforementioned range, the heat resistance and impact resistance of the resin composition will be well balanced. For example, a sheet-shaped laminate of the resin composition and a thermoplastic resin such as polycarbonate (Hereinafter also referred to as a laminated sheet) occurrence of warping under high temperature and high humidity is suppressed.

The copolymer (a) used in the present invention preferably has a weight average molecular weight of 40,000 to 500,000, more preferably 70,000 to 300,000, and even more preferably 100,000 to 200,000. When the weight average molecular weight of the copolymer (a) is within the aforementioned range, the resin composition-based molding processability will be excellent, and the resulting molded product will have an excellent balance between scratch resistance and heat resistance.

In the copolymer (a) used in the present invention, the ratio of the weight average molecular weight to the number average molecular weight (in the case of Mw / Mn) is preferably 1.7 or more and 2.6 or less, more preferably 1.7 or more and 2.3 or less, and even more preferably 1.7. Above 2.0 and below.

The weight-average molecular weight and the number-average molecular weight are molecular weights in terms of standard polystyrene measured by gel permeation chromatography (GPC).

The weight average molecular weight, number average molecular weight, and Mw / Mn of the copolymer (a) can be controlled by adjusting the types or doses of the polymerization initiators and chain transfer agents described below.

When the copolymer (a) used in the present invention is obtained, the yellowness index of the monomer mixture supplied to the polymerization reaction is preferably 2 or less, and more preferably 1 or less. The smaller the yellow index of the monomer mixture, the easier it is to obtain a molded article with little dyeing at high productivity when the obtained resin composition is molded. The yellowness index is a value of yellowness calculated using a colorimeter ZE-2000 manufactured by Nippon Denshoku Industries Co., Ltd., based on a value measured in accordance with JIS Z8722 and based on JIS K7373.

The dissolved oxygen content of the above-mentioned monomer mixture is preferably 10 ppm or less, more preferably 5 ppm or less, even more preferably 4 ppm or less, and particularly preferably 3 ppm or less. When the amount of dissolved oxygen is set in this range, the polymerization reaction proceeds smoothly, and a silver-colored or undyed molded product can be easily obtained.

The production of the copolymer (a) used in the present invention is not particularly limited by a polymerization method. Examples include a suspension polymerization method, a (continuous) block polymerization method, a solution polymerization method, and an emulsion polymerization method. This polymerization method is preferably performed by radical polymerization. Among related polymerization methods, a suspension polymerization method or a (continuous) block polymerization method is preferable, and a suspension polymerization method is more preferable from the viewpoint of productivity and thermal decomposition resistance.

Polymerization is initiated by a polymerization initiator added with the monomer mixture. In addition, by adding a chain transfer agent to the monomer mixture according to demand, the weight average molecular weight, number average molecular weight, and molecular weight distribution of the copolymer (a) obtained can be adjusted.

The polymerization initiator used in the production of the copolymer (a), as long as it is There is no particular limitation on those that can generate reactive radicals. Examples include: third hexyl isopropyl monocarbonate, third hexyl 2-ethylhexanoate, and 1,1,3,3-tetramethylbutyl 2-ethylhexanoate. Esters, third butyl trimethyl acetate, third hexyl trimethyl acetate, third butyl neodecanoate, third hexyl neodecanoate, peroxy 1,1,3,3-tetramethylbutyl neodecanoate, 1,1-bis (tertiary hexyl peroxide) cyclohexane, benzamidine peroxide, 3,5,5-trimethyl peroxide Hexamidine, Laurel Peroxide, 2,2'-Azobis (2-methylpropionitrile), 2,2'-Azobis (2-methylbutyronitrile), Dimethyl 2,2 ' -Azobis (2-methylpropionate) and the like. Among these, third-hexyl 2-ethylhexanoate peroxide, 1,1-bis (third-hexyl peroxide) cyclohexane, and dimethyl 2,2'-azobis (2-methyl) Propionate).

For the related polymerization initiator, the 1-hour half-life temperature is preferably 60 to 140 ° C, and more preferably 80 to 120 ° C. These polymerization initiators may be used singly or in combination of two or more kinds. The amount of addition of the polymerization initiator, the method of addition, and the like may be appropriately set depending on the purpose, and are not particularly limited. For example, the amount of the polymerization initiator used in the suspension polymerization method is preferably 0.0001 to 0.1 parts by mass, and more preferably 0.001 to 0.07 parts by mass relative to 100 parts by mass of the monomer mixture.

The chain transfer agent used in the production of the copolymer (a) is not particularly limited. Examples include: n-octyl mercaptan, n-dodecyl mercaptan, tertiary dodecyl mercaptan, 1,4-butanedithiol, 1,6-hexanedithiol, ethylene glycol dithiopropionic acid Ester, butanediol dimercaptoacetate, butanediol dithiopropionate, hexanediol dimercaptoacetate, hexanediol dithiopropionate, trimethylolpropane- (β-thio Propionate), alkyl groups such as pentaerythritol 3-mercaptopropionate Thiols; α-methylstyrene dimer; terpineolene. Among these compounds, alkyl mercaptans such as n-octyl mercaptan and pentaerythritol 3-mercaptopropionate are preferred. These chain transfer agents may be used singly or in combination of two or more kinds. The use amount of the chain transfer agent is preferably 0.1 to 1 part by mass, more preferably 0.2 to 0.8 part by mass, and even more preferably 0.3 to 0.6 part by mass, with respect to 100 parts by mass of the monomer mixture.

Each of the monomers, polymerization initiators, and chain transfer agents used in the production of the copolymer (a) may be all mixed and supplied to the reaction tank, or they may be separately supplied to the reaction tank. In the present invention, a method of mixing the whole and supplying the mixture to a reaction tank is preferred.

Lubricants are well-known additives added to resins in order to impart abrasion resistance and mold release properties. As the lubricant, higher alcohol-based lubricants, hydrocarbon-based lubricants, fatty acid-based lubricants, fatty acid metal salt-based lubricants, aliphatic amidine-based lubricants, and ester-based lubricants are known.

Among these lubricants, the lubricant (x) used in the present invention includes a higher alcohol, a hydrocarbon, a fatty acid, a fatty acid metal salt, an aliphatic ammonium amine, and a molecule not containing two or more hydroxyl groups. At least one selected from the group consisting of fatty acid esters is preferably selected from the group consisting of an aliphatic monohydric alcohol having 12 to 18 carbon atoms and a saturated fatty acid having 16 to 24 carbon atoms. At least one of them is more preferably an aliphatic monohydric alcohol having 12 to 18 carbon atoms.

Examples of higher alcohols include dodecanol, tetradecanol, cetyl alcohol, stearyl alcohol, and oleyl alcohol. The higher alcohols used in the present invention From the viewpoint of high properties and less mold soiling and roller soiling, aliphatic monohydric alcohols are preferred, aliphatic monohydric alcohols having 12 to 18 carbon atoms are more preferred, and carbon atoms 12 to 18 are even more preferred. The saturated aliphatic monohydric alcohol is more preferably a saturated aliphatic monohydric alcohol having 16 to 18 carbon atoms.

As the hydrocarbon, an aliphatic hydrocarbon having 12 or more carbon atoms is preferred from the viewpoint of high abrasion resistance and releasability. In addition, commercially available products such as liquid paraffin, microcrystalline paraffin, natural paraffin, synthetic paraffin, and polyolefin waxes; partial oxides of aliphatic hydrocarbons; and halides of aliphatic hydrocarbons can be used. Even in the case of these commercially available mixtures, it is preferable that the average number of carbon atoms of the aliphatic hydrocarbon system contained is 12 or more.

Examples of fatty acids include dodecanoic acid, hexadecanoic acid, stearic acid, eicosanoic acid, behenic acid, behenic acid, octadecenoic acid, erucic acid, eicosatetraenoic acid, and 12-hydroxy stearic acid. Fatty acid and so on. The fatty acid used in the present invention is preferably a fatty acid having a carbon number of 10 or more, more preferably a fatty acid having a carbon number of 16 to 24, and even more preferably, from the viewpoint of high abrasion resistance and less soiling of a mold and a dirty roller. It is a saturated fatty acid with 16 to 24 carbon atoms.

Examples of fatty acid metal salts include cadmium stearate, cadmium dodecanoate, cadmium ricinoleate, cadmium naphthenate, cadmium 2-ethylhexanoate, barium stearate, barium dodecanoate, barium ricinoleate, Barium naphthenate, barium 2-ethylhexanoate, calcium stearate, calcium dodecanoate, calcium ricinoleate, strontium stearate, zinc stearate, zinc dodecanoate, zinc ricinoleate, 2- Zinc ethylhexanoate, lead stearate, lead binary stearate, lead naphthenate, tin stearate, aluminum stearate, magnesium stearate, etc.

As the fatty acid constituting the fatty acid metal salt, from the viewpoint of high abrasion resistance and less soiling of the mold and soiling of the drum, it is preferably 10 or more carbon atoms. The above fatty acid is more preferably a fatty acid having 16 to 24 carbon atoms, and even more preferably a saturated fatty acid having 16 to 24 carbon atoms. As the metal constituting the fatty acid metal salt, from the viewpoints of stability and abrasion resistance, it is preferable to include calcium, magnesium, zinc, lead, tin, iron, cadmium, aluminum, barium, cobalt, nickel, manganese, and strontium. At least one metal selected from the group consisting of titanium, vanadium, and copper, and more preferably, at least one metal selected from the group consisting of calcium, magnesium, zinc, and lead.

Examples of the aliphatic ammonium include ammonium dodecanoate, ammonium hexadecanoate, ammonium stearate, ammonium eicosanate, ammonium behenate, ammonium stearyl enoate, and eicosenoic acid. Ammonium amine, erucamide, erucamide, methylenebisstearate, ammonium bis-stearate, and the like. The aliphatic ammonium amine used in the present invention is preferably a fatty acid ammonium having 12 or more carbon atoms, and more preferably 16 to 22 carbons, from the viewpoints of high abrasion resistance and less soiling of the mold and roller. Fatty acid ammonium is preferably unsaturated fatty acid ammonium having 16 to 22 carbon atoms.

Examples of fatty acid esters that do not contain two or more hydroxyl groups in one molecule include fatty acid esters of monohydric alcohols and fatty acid esters of dihydric alcohols. Specific examples include diglycerides and triglycerides. Glyceryl ester, ethylated monoglyceride, stearate stearate, butyl stearate, ethylene glycol monostearate, ethylene glycol distearate, and the like. The fatty acid ester that does not contain two or more hydroxyl groups in one molecule used in the present invention has the number of carbon atoms of the fatty acid in the fatty acid ester from the viewpoints of high abrasion resistance and low mold soiling and roller soiling. It is preferably 10 or more, and more preferably 16 to 24.

The amount of the lubricant (x) is 0.001 parts by mass or more and 2 parts by mass or less, and preferably 0.005 parts by mass based on 100 parts by mass of the copolymer (a). The above is 1 part by mass or less, and more preferably 0.01 part by mass or more and 0.5 part by mass or less. If it is less than 0.001 parts by mass, the effect of the above-mentioned lubricant (x) becomes insufficient, and if it is more than 2 parts by mass, not only the greater effect of the above-mentioned lubricant (x) cannot be obtained, but also such lubrication The agent may leak from the molded product and the surface of the molded product may be sticky. The lubricant (x) may be used alone or in combination of two or more. As the lubricant (x), if a plurality of types of lubricants (x) having a melting point difference of 5 ° C. or more are used, effects such as abrasion resistance can be exhibited over a wider temperature range, so it is preferable.

The lubricant (y1) used as required in the resin composition according to an embodiment of the present invention is a monoglyceride containing saturated fatty acids having 10 to 24 carbon atoms. Examples of the monoglyceride of a saturated fatty acid having 10 to 24 carbon atoms include monoglyceride such as glycerol monostearate and glycerol monobehenate.

The lubricant (y2) used as required in a resin composition according to another embodiment of the present invention is a substance containing a fatty acid ester containing two or more hydroxyl groups in one molecule. Examples of the fatty acid ester containing two or more hydroxyl groups in one molecule include polyhydric alcohol fatty acid partial esters, and specific examples thereof include monoglycerides such as glycerol monostearate and glycerol monobehenate. Glyceryl ester, pentaerythritol monostearate, pentaerythritol distearate and other pentaerythritol mono / diesters, sorbitan monostearate, sorbitan monohexadecanoate and other sorbitan mono / diesters and the like. A fatty acid ester containing two or more hydroxyl groups in one molecule is preferably 10 to 40, more preferably 10 to 24, and even more preferably 14 to 24. The fatty acid may be an unsaturated fatty acid or a saturated fatty acid.

The amount of lubricant (y1) or (y2) relative to the copolymer (a) 100 The mass part is 0.1 mass part or less, preferably 0.05 mass part or less, more preferably 0.03 mass part or less, and still more preferably 0.01 mass part or less. When the amount of the lubricant (y1) or (y2) is too large, gels are formed when the resin composition is melt-molded, and impurity defects or poor appearance tend to occur in the molded product.

The resin composition of the present invention may contain various additives according to other needs. Examples of related additives include thermal stabilizers, antioxidants, thermal degradation inhibitors, ultraviolet absorbers, light stabilizers, inorganic fillers, inorganic fibers or organic fibers, polymer processing aids, antistatic agents, and flame retardants. , Dyes, pigments, colorants, matting agents, light diffusing agents, impact modifiers, fluorescent, adhesives, tackifiers, plasticizers, foaming agents, etc. The content of these additives can be appropriately set within a range that does not impair the effect of the present invention. For example, in 100 parts by mass of the resin composition of the present invention, it is preferable that the content of the antioxidant is 0.01 to 1.0 part by mass, the content of the ultraviolet absorber is 0.01 to 3.0 part by mass, and the content of the dye pigment is 0.00001 to 0.01 part by mass. Serving.

In addition, the resin composition of the present invention can be used by mixing with other polymers other than the copolymer (a) as long as the effect of the present invention is not impaired. Other related polymers include polyolefins such as polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, and polynorbornene; ethylene-based ionic polymers; polystyrene, Styrene-maleic anhydride copolymer, impact-resistant polystyrene, acrylonitrile-styrene resin (AS resin), acrylonitrile-butadiene-styrene resin (ABS resin), acrylonitrile-EPDM rubber-styrene Copolymer (AES), acrylonitrile-butyl acrylate-styrene copolymer (AAS), acrylonitrile-styrene-chlorinated polyethylene copolymer (ACS), methyl methacrylate-butadiene-styrene copolymer (MBS) and other styrene Series resin; methyl methacrylate-styrene copolymer; polyesters such as polyethylene terephthalate and polybutylene terephthalate; polyamide 6, nylon 66, polyamide synthetic rubber, etc. ; Polycarbonate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyacetal, polyvinylidene fluoride, polyurethane, modified polyphenylene ether, poly Phenyl sulfide, modified silicone resin; acrylic rubber, silicone rubber; styrene-ethylene-propylene-styrene copolymer (SEPS), styrene-ethylene-butene-styrene copolymer (SEBS), styrene-isoprene Diene-styrene copolymer (SIS) and other styrene-based thermoplastic synthetic rubbers; Polyisoprene rubber (IR), ethylene-propylene rubber (EPR), ethylene-propylene-diene rubber (EPDM), and other olefin-based rubbers Wait. These other polymers may be used alone or in combination.

The content of these other polymers in the resin composition of the present invention is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 2% by mass or less.

The method for preparing the resin composition of the present invention is not particularly limited. For example: knead copolymer (a) can be kneaded at a temperature above the softening point, and lubricant (x), lubricant (y1) or lubricant (y2), or The blended additives and other polymers are kneaded to obtain a resin composition; or the copolymer (a), the lubricant (x), the lubricant (y1) blended according to demand or A lubricant (y2), an additive blended as required, and other polymers are dissolved in a solvent, and the solvent is removed from the solution, thereby obtaining a resin composition.

The resin composition of the present invention preferably has a glass transition temperature of 115 ° C to 150 ° C, more preferably 130 ° C to 150 ° C. More preferably, it is 140 ° C or more and 150 ° C or less. When the glass transition temperature of the resin composition is within the aforementioned range, the heat resistance and impact resistance of the resin composition are well balanced. For example, a laminated sheet of the resin composition and a thermoplastic resin such as polycarbonate under high temperature and high humidity The occurrence of warpage is suppressed.

The saturated water absorption rate of the resin composition of the present invention in water at 23 ° C is preferably 0.3 to 1.8% by mass, more preferably 0.5 to 1.5% by mass, and even more preferably 0.5 to 1.0% by mass. When the saturated water absorption is within the aforementioned range, warpage of the laminated body due to moisture absorption can be suppressed. In addition, the saturated water absorption rate is relative to the mass of a molded product that has been vacuum-dried for more than 3 days. The molded product is immersed in distilled water at 23 ° C, and the time-varying mass is measured as an increase rate of mass at equilibrium. And the measured value.

The resin composition of the present invention can be extruded by co-extrusion molding, T-die lamination, extrusion coating, etc .; insert injection molding, two-color injection molding, and core injection molding. , Sandwich injection molding, injection press molding and other injection molding methods; blow molding; blow molding; lapping molding; press molding; slash molding , And obtain a variety of molded products. Even if the resin composition of the present invention is melt-molded at a high temperature, it is not easy to form a gel, and therefore, it is also suitable for manufacturing a molded product that requires high-temperature molding conditions. The resin composition of the present invention is suitable for manufacturing a large-area and thin molded product such as a sheet, a film, or a plate.

The laminated system of the present invention includes at least one layer including the resin composition of the present invention (hereinafter also referred to as resin composition [a]), and including the resin composition At least one layer of other materials. Other materials used in the laminated body of the present invention are not particularly limited. Examples include organic materials such as resins; and inorganic materials such as metal monomers and metal oxides.

A multilayer body according to an embodiment of the present invention includes a layer including at least one layer of the resin composition [a] and a layer including at least one layer of the resin composition [b].

The resin contained in the resin composition [b] is not particularly limited. Examples of the resin include polyolefins such as polyethylene and polypropylene, polystyrene, (meth) acrylic resin, polyester, polyamide, polycarbonate, polyvinyl chloride, polyvinylidene chloride, and polyethylene. Vinyl alcohol, ethylene-vinyl alcohol copolymer, polyacetal, polyvinylidene fluoride, polyurethane, modified polyphenylene ether, polyphenylene sulfide, modified silicone resin, polydiether ketone, polyfluorene , Polyxylene oxide, polyimide, polyetherimide; phenolic resin, melamine resin, silicone resin, epoxy resin and other thermosetting resins; energy ray curing resins. These resins may be used singly or in combination of two or more kinds. Among these resins, a thermoplastic resin is preferred, and polycarbonate is more preferred.

When polycarbonate is used as the resin, the amount of polycarbonate contained in the resin composition [b] is preferably 90% by mass or more, more preferably 95% by mass or more, and even more preferably 98% by mass or more. The weight average molecular weight of the polycarbonate is preferably 20,000 to 100,000. When the weight average molecular weight of the polycarbonate is within this range, the heat resistance and impact resistance of the resin composition [b] are improved, and the resin composition [a] can be manufactured with excellent molding processability and high productivity. And the laminated sheet of the resin composition [b]. The Mw / Mn system of the polycarbonate is preferably 1.7 to 2.6. , More preferably 1.7 to 2.3, and even more preferably 1.7 to 2.0. The weight-average molecular weight Mw and the number-average molecular weight Mn are molecular weights in terms of standard polystyrene measured by gel permeation chromatography (GPC).

The resin composition [b] used in the present invention preferably has a glass transition temperature of 130 ° C or higher and 160 ° C or lower. The glass transition temperature of the resin composition [b] is preferably about the same as the glass transition temperature of the resin composition [a]. Specifically, the difference ΔTg between the glass transition temperature of the resin composition [b] and the glass transition temperature of the resin composition [a] is preferably 30 ° C or lower, more preferably 20 ° C or lower. If the glass transition temperatures of both are the same, the effect of suppressing the occurrence of warpage of the laminated sheet under high temperature and high humidity will be higher.

The resin composition [b] used in the present invention may contain well-known additives in order to improve thermal decomposition resistance, thermal discoloration resistance, light resistance, and the like. Examples of the additives include antioxidants, thermal degradation inhibitors, ultraviolet absorbers, light stabilizers, lubricants, release agents, polymer processing aids, antistatic agents, flame retardants, dyes, pigments, light diffusing agents, and organics. Pigments, matting agents, impact modifiers, fluorescent qualities, etc.

A laminated body according to another embodiment of the present invention includes at least one layer including the resin composition [a], at least one layer including the resin composition [b], and at least one functional imparting layer [c]. The functionality-imparting layer [c] is not particularly limited. Examples include: a hard coat layer, an antistatic layer, an antifouling layer, an antifriction layer, an antiglare layer, an antireflection layer, an adhesive layer, and an impact strength enhancing layer. The functional imparting layer [c] can be formed by a known method. For example, the hard coating can be applied by drying the resin solution for hard coating and drying it. And hardened. The antireflection layer can be obtained by laminating a low refractive index film and a high refractive index film by vapor deposition or the like. Among the functional imparting layers [c], for example, a hard coat layer, an antistatic layer, an antifouling layer, an antifriction layer, an antiglare layer, an antireflection layer, etc., are usually provided on the outermost side of the laminate. The functional layer [c] may be provided with only one type or plural types.

The layer structure in the laminated body of this invention is not specifically limited. As the layering sequence of the multilayer body of the present invention, if the layer containing the resin composition [a] is marked as [a] layer, the layer containing the resin composition [b] is marked as [b] layer, and the functional imparting layer [c ] Is marked as [c] layer, for example: [a] layer / [b] layer, [a] layer / [b] layer / [a] layer, [b] layer / [a] layer / [b ] Layer, [a] layer / [b] layer / [a] layer / [b] layer / [a] layer / [a] layer / [a] layer / [b] layer / [c] layer / [c] layer / [a ] Layer / [b] layer, [c] layer / [a] layer / [b] layer / [c] layer, [c] layer / [a] layer / [b] layer / [b] layer / [a] layer / [c ] Layer, [a] layer / [b] layer / [c] layer / [b] layer / [a] layer, etc. For example, when the [c] layer is a hard coating layer, it is preferably [c] layer / [a] layer / [b] layer, [c] layer / [a] layer / [b] layer / [c] layer , [C] layer / [a] layer / [b] layer / [a] layer / [c] layer.

The present invention is useful in a laminated sheet having a shape such as a sheet, a sheet, or a film. In the case where the laminated sheet of the present invention is used to protect a casing, it is preferable that the resin composition [a] layer is located at the outermost side when viewed from the protected surface. For example, it is preferable to arrange a laminated sheet composed of layers including [a] layer / [b] layer in the order of [a] layer / [b] layer / protected surface, or to include [a] layer / The laminated sheet composed of the [b] layer / [a] layer is arranged in the order of [a] layer / [b] layer / [a] layer / protected surface.

In the laminated sheet of the present invention, the total thickness is preferably 0.2 to 2 mm, and more preferably 0.5 to 1.5 mm. If it is too thin, the rigidity tends to become insufficient. If it is too thick, it may become lighter than a liquid crystal display device. Quantitative obstacles.

The thickness of the layer containing the resin composition [a] in the laminated sheet of the present invention is preferably in the range of 0.02 to 0.5 mm, more preferably in the range of 0.03 mm to 0.3 mm, and even more preferably in the range of 0.05 to 0.1 mm. range. If the relevant thickness is less than 0.01 mm, scratch resistance and weather resistance may be insufficient. Moreover, when it exceeds 0.5 mm, impact resistance may become inadequate.

From the viewpoint of suppressing the occurrence of warping under high temperature and high humidity, the laminated sheet of the present invention is preferably made such that the laminated order becomes symmetrical in the thickness direction, and more preferably, the thickness of each layer becomes symmetrical.

The laminated sheet of the present invention is not particularly limited by its manufacturing method, and can be produced by a multilayer molding method such as multilayer extrusion molding, multilayer blow molding, multilayer press molding, multi-color injection molding, and insert injection molding. Among these multilayer molding methods, from the viewpoint of productivity, multilayer extrusion molding of the resin composition [a] and the resin composition [b] is preferred.

The method of multilayer extrusion is not particularly limited, and the well-known multilayer extrusion molding method used in the manufacture of multilayer laminated sheets of thermoplastic resin can be used, for example, by having a flat T-shaped die and polishing the surface of which has been processed into a mirror The device is formed by a roller. As the method of the T-shaped mold, the resin composition [a] and the resin composition [b] which are heated and melted can be used as a feed block method of being laminated before flowing into the T-shaped mold, or a resin composition [ a] and the resin composition [b] are a multi-manifold method in which a T-die is laminated. From the viewpoint of improving the smoothness of the interface between the layers constituting the laminated sheet, the multiple shunt tube method is preferred.

The resin composition [a] and the resin composition [b] are preferably melt-filtered by a filter before multilayer molding. By forming a multilayer by using each resin composition which has been melt-filtered, a laminated sheet having few defects such as impurities and gels can be obtained. The filter used for the melt filtration is not particularly limited. This filter is appropriately selected from well-known ones from the viewpoints of use temperature, viscosity, and pursuit of filtration accuracy. Specific examples of the filter include a non-woven fabric containing polypropylene, cotton, polyester, slime, glass fiber, etc .; a phenolic resin impregnated cellulose film; a metal fiber non-woven sintered film; a metal powder sintered film; a metal mesh; or The combination of these. Among these, from the viewpoints of heat resistance, durability, and pressure resistance, it is preferable to use a plurality of laminated metal fiber nonwoven sintered films.

The filtration accuracy of this filter is not particularly limited, but it is preferably 30 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less.

Regarding the use of the formed article of the present invention as a laminated body or laminated sheet, for example, advertising towers, standing signs, side signboards, door signs, roof signs, and other sign parts; display cases, partition boards, Store display and other display parts; fluorescent lamp cover, atmosphere lighting cover, lamp cover, illuminated ceiling, light wall, chandeliers and other lighting parts; pendants, mirrors and other interior decoration parts; doors, vaults, safety glass windows, partition walls, stair walls, Balcony guards, roofs of leisure buildings, and other construction parts; aircraft windshields, pilot sunshades, motorcycles, motorboat windshields, bus sunshades, car sunshades, rear sunshades, front wings, headlights Lamps and other transport-related parts; signs for audio and video, stereo enclosures, TV protection masks, outside of vending machine displays Covers and other electronic machine parts; thermal insulation boxes, X-ray parts and other medical equipment parts; mechanical housings, instrument covers, experimental devices, scales, dials, observation windows and other machine-related parts; LCD protection plates, light guide plates, light guide films, Philippines Optical related parts such as nellens lens, lenticular lens, various display panels, diffuser plates; traffic related parts such as road signs, guide plates, curved mirrors, soundproof walls; surface materials for automotive interiors, surface materials for mobile phones, marking films, etc. Components; components of the upper cover of washing machines and control panels, top panels of rice cookers, and other household appliances; other, greenhouses, large sinks, box sinks, clock panels, bathtubs, sanitary equipment, table mats, game parts, toys Masks for face protection during welding.

The molded article of the present invention can be used as a panel for various displays. The related panel can be obtained by heating and melting the resin composition by general molding methods such as extrusion molding and injection molding.

The display device using the aforementioned panel is not particularly limited, and examples thereof include large display devices such as large-screen televisions and advertising displays; small and medium display devices such as mobile phones and smart phones.

The panel is not limited to a flat shape, and may have a curved shape. The curved surface shape may be a shape curved in one direction, or may be a shape curved in a plurality of directions. In order to make the panel into a curved shape, the plate-shaped formed body may have flexible characteristics, or may be formed in advance into a desired curved shape.

In addition, the molded article of the present invention can be used in the above-mentioned various applications in a hard-coated state by a method such as spray coating or dip coating on the surface. By hard coating, the hardness of the pencil on the surface becomes high and it becomes difficult to damage. In addition to hard coating, an anti-glare layer or an anti-reflection layer may be provided to block electromagnetic waves. , UV, and near-infrared layers.

The formed article of the present invention may be laminated with other functional films and functional sheets via an adhesive layer and an adhesive layer, or may be laminated by film insert molding. Examples of the functional film or functional sheet include a light guide plate or a diffusion plate, a shatter-resistant film, and a transparent conductive film.

[Example]

The following examples and comparative examples illustrate the present invention more specifically. However, the present invention is not limited to these embodiments.

The physical properties of the methacrylic resin and the methacrylic resin composition obtained in Production Examples, Examples 1a to 4a, and Comparative Examples 1a to 3a were measured by the following methods.

<Glass transition temperature (Tg)>

According to JIS K7121, a methacrylic resin or a methacrylic resin composition is heated from room temperature to 200 ° C at 20 ° C / minute, held for 10 minutes, cooled to room temperature, and then heated from room temperature at 10 ° C / minute. Differential scanning calorimetry (DSC) was performed at a temperature of 200 ° C. The intermediate-point glass transition temperature determined from the DSC curve measured at the second temperature increase was used as the glass transition temperature in the present invention. As a measuring device, DSC-50 manufactured by Shimadzu Corporation was used.

<Saturated water absorption>

Using an injection molding machine (SE-180DU-HP, manufactured by Sumitomo Heavy Industries, Ltd.), the methacrylic resin composition was injection molded under the conditions of a cylinder temperature of 280 ° C, a mold temperature of 75 ° C, and a molding cycle of 1 minute, and A square test piece having a thickness of 2 mm and a side length of 50 mm was obtained. At temperature The test piece was vacuum-dried for 24 hours at 80 ° C and 5 mmHg. Next, the test piece was allowed to cool in a desiccator. The test piece was taken out of the desiccator and the mass (initial mass) was measured immediately.

Next, this test piece was immersed in distilled water at 23 ° C. The test piece was taken out of the water, the water adhering to the surface was wiped off, and the mass was measured. This test piece was immersed in distilled water, and the mass was measured in the same manner as described above. Repeated immersion in distilled water and mass measurement until no change in mass. The saturated water absorption was calculated from the mass (water absorption mass) and the initial mass without mass change by the following formula.

Saturated water absorption (%) = [(water absorption mass-initial mass) / initial mass] × 100

<Manufacturing Example 1>

In a high-pressure reactor, 63 parts by mass of methyl methacrylate, 35 parts by mass of methacrylic acid [5.2.1.0 ^2,6 ] dec-8-yl, 2 parts by mass of methyl acrylate, and 0.06 parts by mass of Azobisisobutyronitrile, 0.01 parts by mass of 1,1-bis (third butyl peroxide) cyclohexane, 0.47 parts by mass of pentaerythritol-3-mercaptopropionate, 250 parts by mass of water, 0.09 parts by mass Parts of a dispersant and 1.07 parts by mass of a pH adjuster.

While stirring the inside of the high-pressure reactor, the temperature of the liquid was raised from room temperature to 70 ° C., and the temperature was maintained at 70 ° C. for 120 minutes, and then maintained at 120 ° C. for 60 minutes to allow the polymerization reaction to proceed. The temperature of the liquid was lowered to room temperature, and the polymerization reaction liquid was withdrawn from the high-pressure reactor. The solid content was taken out from the polymerization reaction solution by filtration, washed with water, and dried with hot air at 80 ° C for 24 hours. The obtained solid content was supplied to a hopper of a biaxial extruder, and melt-kneaded at a cylinder temperature of 230 ° C. Then, the molten resin was extruded to obtain glass. Granular methacrylic resin [A] with a transfer temperature of 123 ° C.

<Manufacturing Example 2>

In a high-pressure reactor, 96.5 parts by mass of methyl methacrylate, 2.5 parts by mass of methyl acrylate, 0.06 parts by mass of azobisisobutyronitrile, 0.25 parts by mass of n-octyl mercaptan, 250 parts by mass of water, 0.09 Part by mass of dispersant and 1.07 part by mass of pH adjuster.

While stirring the inside of the high-pressure reactor, the temperature of the liquid was raised from room temperature to 70 ° C, and maintained at 70 ° C for 120 minutes to perform a polymerization reaction. The temperature of the liquid was lowered to room temperature, and the polymerization reaction liquid was drawn out from the high-pressure reactor. The solid content was taken out from the polymerization reaction solution by filtration, washed with water, and dried with hot air at 80 ° C for 24 hours. The obtained solid content was supplied to a hopper of a biaxial extruder, and melt-kneaded at a cylinder temperature of 230 ° C. Thereafter, a molten resin was extruded to obtain a granular methacrylic resin [B] having a glass transition temperature of 110 ° C.

<Example 1a>

100 parts by mass of a methacrylic resin [A] and 0.15 parts by mass of cetyl alcohol were used as a lubricant, and the biaxial kneader was used for melting and kneading at a cylinder temperature of 230 ° C. Thereafter, the molten resin was extruded to obtain a granular methacrylic resin composition [x1]. The composition and physical properties of the methacrylic resin composition [x1] are shown in Table 1.

<Example 2a>

A methacrylic resin composition [x2] was obtained in the same manner as in Example 1a, except that 0.04 parts by mass of stearic acid monoglyceride was further added as a lubricant. The composition and physical properties of the methacrylic resin composition [x2] are shown in Table 1.

<Example 3a>

A methacrylic resin composition [x3] was obtained in the same manner as in Example 1a, except that 0.1 parts by mass of monoglyceryl stearate was added as a lubricant. The composition and physical properties of the methacrylic resin composition [x3] are shown in Table 1.

<Example 4a>

A methacrylic resin composition [x4] was obtained in the same manner as in Example 1a, except that the amount of cetyl alcohol was changed to 0.3 parts by mass. The composition and physical properties of the methacrylic resin composition [x4] are shown in Table 1.

<Comparative example 1a>

A methacrylic resin composition [x5] was obtained in the same manner as in Example 1a, except that 0.15 parts by mass of cetyl alcohol was changed to 0.15 parts by mass of monoglyceryl stearate. The composition and physical properties of the methacrylic resin composition [x5] are shown in Table 1.

<Comparative example 2a>

A methacrylic resin composition [x6] was obtained in the same manner as in Comparative Example 1a, except that 0.15 part by mass of cetyl alcohol was further added as a lubricant. The composition and physical properties of the methacrylic resin composition [x6] are shown in Table 1.

<Comparative Example 3a>

A granular methacrylic resin composition [x7] was obtained in the same manner as in Comparative Example 1a, except that the methacrylic resin [A] was changed to the methacrylic resin [B]. The composition and physical properties of the methacrylic resin composition [x7] are shown in Table 1.

As shown in the above results, the resin composition (Examples 1a to 4a) of the present invention has a high glass transition temperature and low water absorption.

The laminated sheets obtained in Examples 1b to 4b and Comparative Examples 1b to 4b were evaluated by the following methods.

<Appearance>

The methacrylic resin side surface of the laminated sheet was visually observed, and the number of impurity defects was calculated.

In the area of 1 m ² , if the number of defects is 1 or less, it is recorded as ◎; 2 as the circle;

<Formability>

The methacrylic resin side surface of the laminated sheet was visually observed, and the presence or absence of step-like defects (release marks) perpendicular to the extrusion flow direction was examined.

In the range of 30 cm in the extrusion flow direction, those who can not be visually recognized as level difference defects are marked as ◎; those who can hardly be visually recognized as ○; those who can be visually recognized as slightly △; can be clearly confirmed visually The arrival is recorded as ×.

<Warpage change amount>

Let the short side be the direction perpendicular to the extrusion flow direction, A rectangular test piece having a short side of 30 mm and a long side of 150 mm was cut out from the laminated sheet so that the direction parallel to the extrusion flow direction became the long side. The short side of the suspended test piece was left in an environmental testing machine set at a temperature of 23 ° C. and a relative humidity of 50% for 72 hours. The test piece was allowed to cool to 23 ° C. The test piece was bent into a bow shape. The bow-shaped test piece is placed on the platform in such a way that the end of the test piece contacts the platform (that is, the test piece is mountain-shaped), and the gap between the platform and the test piece is measured using a feeler gauge. Maximum distance between gaps (normally, the vicinity of the center of the long side of the test piece is the maximum). This value was used as the initial warpage amount.

Next, the short side of the test piece bent in a bow shape was suspended and left in an environmental testing machine set at a temperature of 85 ° C. and a relative humidity of 85% for 24 hours. The test piece was allowed to cool to 23 ° C. In the same way as above, the maximum distance between the platform and the test piece was measured. The difference between this measured value and the initial warpage amount is defined as the "warpage change amount". A case where the amount of change in warpage is 1 mm or less is marked as ◎, and a case where the amount of change in warpage is more than 1 mm is marked as x.

<Example 1b>

Polycarbonate ("SD POLYCA (registered trademark) PCX" manufactured by Sumika Styron Polycarbonate Co., Ltd.) was continuously fed into a uniaxial extruder [I] with a cylinder diameter of 50 mm and a cylinder temperature of 280 ° C and a discharge volume of 30 kg / hour. ", The same below) pills.

The pellets of the methacrylic resin composition [x1] were continuously fed into a uniaxial extruder [II] having a cylinder diameter of 30 mm and a cylinder temperature of 220 ° C and a discharge volume of 2 kg / hour.

Simultaneously extrude the polycarbonate and methacrylic resin composition [x1] from the extruder [I] and the extruder [II] and introduce them into the junction block Then, the polycarbonate and the methacrylic resin composition [x1] were co-extruded into a sheet shape using a multi-manifold mold with a temperature of 250 ° C. This sheet was bank-formed between the first and second rollers of the four rollers in the horizontal direction, and cooled while transferring the mirror surface with the four rollers to obtain a methacrylic acid containing 60 μm thickness. A laminated sheet having a total thickness of 1,000 μm composed of a layer of the resin composition [x1] and a layer including a polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Example 2b>

A layer containing a methacrylic resin composition [x2] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x2]. A laminated sheet having a total thickness of 1,000 μm and a layer containing polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Example 3b>

A layer containing a methacrylic resin composition [x3] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x3]. A laminated sheet having a total thickness of 1,000 μm and a layer including a polycarbonate layer having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Example 4b>

A layer containing a methacrylic resin composition [x4] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x4]. A laminated sheet having a total thickness of 1,000 μm and a layer containing polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Comparative Example 1b>

A layer containing a methacrylic resin composition [x5] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x5]. A laminated sheet having a total thickness of 1,000 μm and a layer containing polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Comparative Example 2b>

A layer containing a methacrylic resin composition [x6] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x6]. A laminated sheet having a total thickness of 1,000 μm and a layer containing polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Comparative Example 3b>

A layer containing a methacrylic resin composition [x7] having a thickness of 60 μm was obtained in the same manner as in Example 1b, except that the methacrylic resin composition [x1] was changed to a methacrylic resin composition [x7]. A laminated sheet having a total thickness of 1,000 μm and a layer containing polycarbonate having a thickness of 940 μm. The evaluation results of the laminated sheet are shown in Table 2.

<Comparative Example 4b>

Except that the methacrylic resin composition [x1] was changed to the methacrylic resin [A], a layer containing a methacrylic resin [A] having a thickness of 60 μm and a thickness of 940 μm were obtained in the same manner as in Example 1b. A laminated sheet with a total thickness of 1000 μm made of a layer containing polycarbonate. The evaluation results of the laminated sheet are shown in Table 2.

As shown in the above results, the multilayered body (Examples 1b to 4b) of the present invention has few defects such as gels and the like caused by melt-forming, and has few mold release marks. Furthermore, the laminated body of the present invention has less warpage even when it is placed under high temperature and high humidity.

Claims (7)

A resin composition comprising: 100 parts by mass of a copolymer (a), the copolymer (a) containing only 10 to 60% by mass of a structural unit derived from an alicyclic methacrylate, 40 to 90% by mass Structural unit derived from methyl methacrylate and structural unit derived from acrylate; and lubricant (x) 0.001 parts by mass or more and 2 parts by mass or less, the lubricant (x) contains 12 to 18 carbon atoms At least one selected from the group consisting of an aliphatic monohydric alcohol, a hydrocarbon, a fatty acid, a fatty acid metal salt, an aliphatic ammonium amine, and a fatty acid ester that does not include two or more hydroxyl groups in one molecule; and the resin The composition does not contain a lubricant (y1) containing a monoglyceride of a saturated fatty acid having 10 to 24 carbon atoms, and a lubricant (y2) containing a fatty acid ester containing two or more hydroxyl groups in one molecule. The resin composition according to claim 1, wherein the lubricant (x) contains at least one selected from the group consisting of an aliphatic monohydric alcohol having 12 to 18 carbon atoms and a saturated fatty acid having 16 to 24 carbon atoms. One. For example, the resin composition of claim 1 has a glass transition temperature of 115 ° C to 150 ° C. For example, the resin composition of claim 1 has a saturated water absorption of 0.3 to 1.8% by mass in water at 23 ° C. A molded article comprising the resin composition according to any one of claims 1 to 4. A laminated body comprising: a layer comprising the resin composition according to any one of claims 1 to 4; and a layer comprising a thermoplastic resin composition having a glass transition temperature of 130 ° C or higher and 160 ° C or lower. The laminated body according to claim 6, wherein the thermoplastic resin composition having a glass transition temperature of 130 ° C or higher and 160 ° C or lower is a polycarbonate-containing resin composition.