Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/04—Carbon
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• • 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
  • C08L51/06—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 homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
  • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
  • C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
  • C08L67/06—Unsaturated polyesters

Definitions

• the present invention relates to a polycarbonate resin composition, a molded body, and a carrier tape.
• Patent Document 1 discloses a carrier tape that prevents electronic components from jumping out of a pocket due to vibration of a mounting machine.
• Polycarbonate resin is an engineering plastic with excellent heat resistance, impact resistance and dimensional stability, and is widely used in various fields, and has attracted attention as a material suitable for carrier tape applications.
• the molded article of the polycarbonate resin is liable to adhere to dust, and this improvement is required.
• a polycarbonate resin and a conductive filler are contained in order to impart an antistatic property or conductivity to a polycarbonate resin composition containing a polycarbonate resin.
• a composition is used (see, for example, Patent Document 2 below).
• the polycarbonate resin composition is used as a container for which antistatic properties and antistatic properties are required, such as a container for transporting or storing electronic components (such as IC chips) (for example, a carrier tape for electronic components (such as IC chips)). Is used.
• a container for transporting or storing electronic components such as IC chips
• carrier tapes for electronic components such as IC chips, etc.
• a certain amount of milling material generated in the process is once recovered and then pulverized, and then the pulverized product is returned to the extruder, melted and kneaded, and then re-molded.
• An object of the present invention is to provide a polycarbonate resin composition capable of suppressing a decrease in conductivity even when it is repeatedly molded. Moreover, the objective of this invention is providing the molded object containing the said resin composition. Furthermore, the objective of this invention is providing the carrier tape containing the said resin composition.
• the present inventor is effective in suppressing a decrease in conductivity when a graft copolymer having a structure including a core part and a covering part covering at least a part of the core part is repeatedly molded.
• the resin composition is repeatedly molded by using a resin composition containing a polycarbonate resin, a polyalkylene terephthalate resin, a carbon material, and the graft copolymer. It was also found that the decrease in conductivity can be suppressed.
• a polycarbonate resin composition according to the present invention contains a polycarbonate resin, a polyalkylene terephthalate resin, a carbon material, and a graft copolymer, and the graft copolymer includes a core portion and at least the core portion.
• a coating portion that covers a part thereof, and the content of the carbon material is 10 to 45 parts by mass with respect to a total of 100 parts by mass of the polycarbonate resin and the polyalkylene terephthalate resin,
• the graft copolymer is 0.5 to 35 parts by mass with respect to 100 parts by mass in total of the polycarbonate resin and the polyalkylene terephthalate resin.
• the polycarbonate resin composition according to the present invention it is possible to suppress a decrease in conductivity even when it is repeatedly molded.
• the decrease in conductivity can be suppressed to a very low level even if it is repeatedly formed by melt extrusion for the purpose of recycling or the like.
• the polycarbonate resin composition according to the present invention is the graft copolymer, wherein the core portion includes a polymer having a structural unit derived from a monomer having an acryloyl group, and the covering portion is an unsaturated carboxylic acid.
• An embodiment including a polymer having a structural unit derived from an ester is preferred. In this case, the effect which suppresses the electroconductive fall at the time of recycling is further excellent.
• the molded body according to the present invention includes the polycarbonate resin composition. According to the molded body according to the present invention, even when the molded body is obtained by repeatedly molding the resin composition, the decrease in conductivity can be suppressed. Furthermore, according to the molded body according to the present invention, it is possible to suppress a decrease in conductivity even when the molded body is obtained by repeatedly molding the resin composition while achieving an excellent appearance of the molded body. .
• the carrier tape according to the present invention includes the polycarbonate resin composition. According to the carrier tape according to the present invention, even when the resin composition is repeatedly molded to obtain a molded body, a decrease in conductivity can be suppressed. Furthermore, according to the carrier tape according to the present invention, it is possible to suppress a decrease in conductivity even when a molded body is obtained by repeatedly molding a resin composition while achieving an excellent appearance of the molded body. .
• the present invention it is possible to suppress a decrease in conductivity even when it is repeatedly molded. Furthermore, according to the present invention, it is possible to suppress a decrease in conductivity even when repeatedly molded while achieving an excellent appearance of the molded body. Therefore, the practical utility value of the present invention is extremely high.
• ADVANTAGE OF THE INVENTION According to this invention, the application to the conveyance or storage of an electronic component of the molded object containing a polycarbonate resin composition can be provided.
• ADVANTAGE OF THE INVENTION According to this invention, the application to conveyance or storage of an electronic component of the carrier tape containing a polycarbonate resin composition can be provided.
• carrier tape refers to an object such as an electronic component (eg, memory microchip, IC chip, resistor, connector, processor, capacitor, gate array, transistor, diode, relay, and LED).
• Examples include carrier tapes used for transporting or storing (components; transport objects, storage objects, etc.).
• the carrier tape is, for example, a packaging material (target object) in which a concave part (a concave part called a pocket part) for accommodating a target object (electronic component or the like) is arranged on a sheet having an arbitrary width at regular intervals. It can be used as a packaging material for (electronic parts, etc.).
• an adhesive or heat-sealable film called a cover tape is continuously adhered to the top of the carrier tape in the direction in which the pockets are continuously provided.
• the lid may be formed by bonding and covering the opening surface of the pocket portion.
• (meth) acryl means at least one of acrylic and methacryl corresponding thereto.
• the content of each component in the composition is the total amount of the plurality of substances present in the composition unless there is a specific notice when there are a plurality of substances corresponding to each component in the composition. means.
• the material illustrated below may be used individually by 1 type, and may use 2 or more types together.
• the polycarbonate resin composition according to this embodiment contains a polycarbonate resin, a polyalkylene terephthalate resin, a carbon material, and a graft copolymer.
• the graft copolymer has a structure including a core portion and a covering portion that covers at least a part of the core portion.
• the content of the carbon material is 10 to 45 parts by mass with respect to 100 parts by mass in total of the polycarbonate resin and the polyalkylene terephthalate resin.
• the graft copolymer is 0.5 to 35 parts by mass with respect to 100 parts by mass in total of the polycarbonate resin and the polyalkylene terephthalate resin.
• the polycarbonate resin composition according to the present embodiment can be used as a conductive polycarbonate resin composition.
• the polycarbonate resin composition according to the present embodiment it is possible to suppress a decrease in conductivity even when it is repeatedly molded.
• this inventor estimates as follows. That is, in the case of using a graft copolymer having a structure including a core part and a covering part, and a carbon material, the carbon material is likely to be present on the surface of the graft copolymer, and the carbon materials are likely to come into contact with each other. Guessed.
• the surface of the graft copolymer is obtained by using a predetermined amount of the graft copolymer having a structure having a core part and a covering part, and a carbon material. It is presumed that a conductive path is easily formed when the carbon materials come into contact with each other.
• the graft copolymer has a structure having a covering portion, the graft copolymer is prevented from aggregating with each other in the resin composition containing the polycarbonate resin and the polyalkylene terephthalate resin. Therefore, it is assumed that the conductive path is easily maintained. Accordingly, it is presumed that the decrease in conductivity is suppressed even when the resin composition is repeatedly molded.
• the polycarbonate resin as the component (A) can be obtained, for example, by a phosgene method in which various dihydroxydiaryl compounds and phosgene are reacted, or a transesterification method in which a dihydroxydiaryl compound and a carbonate (such as diphenyl carbonate) are reacted. And polymers that can be used.
• a molecular weight regulator, a catalyst, and the like can be used as necessary.
• Dihydroxydiaryl compounds include bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) propane (also known as bisphenol A), 2,2 -Bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2-bis (4-hydroxyphenyl-3-methylphenyl) propane 1,1-bis (4-hydroxy-3-tert-butylphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (4-hydroxy-3,5) -Bibromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane and the like (Hydroxyaryl) alkanes; bis (hydroxyaryl) cycloalkanes such as 1,1-bis (4-hydroxyphenyl) cyclopentane and 1,1-bis (4
• a dihydroxydiaryl compound may be used in combination with piperazine, dipiperidylhydroquinone, resorcin, 4,4'-dihydroxydiphenyl, and the like.
• a dihydroxydiaryl compound and a trivalent or higher valent phenol compound may be used in combination.
• trihydric or higher phenol compounds include phloroglucin, 4,6-dimethyl-2,4,6-tris (4-hydroxyphenyl) heptene, 2,4,6-trimethyl-2,4,6-tris (4- Hydroxyphenyl) heptane, 1,3,5-tris (4-hydroxyphenyl) benzene, 1,1,1-tris (4-hydroxyphenyl) ethane, 2,2-bis [4,4- (4,4 ' -Dihydroxydiphenyl) cyclohexyl] propane and the like.
• the viscosity average molecular weight of the component (A) is preferably 10,000 or more, more preferably 15,000 or more, still more preferably 17000 or more, and particularly preferably 20000 or more from the viewpoint of easily obtaining excellent moldability.
• the viscosity average molecular weight of the component (A) is preferably 100000 or less, more preferably 35000 or less, further preferably 28000 or less, and more preferably 25000 or less from the viewpoint of easily obtaining an excellent appearance of the surface of the molded body (sheet or the like). Particularly preferred. From these viewpoints, the viscosity average molecular weight of the component (A) is preferably 10,000 to 100,000, more preferably 15,000 to 35,000, still more preferably 17,000 to 28,000, and particularly preferably 20,000 to 25,000.
• the content of the component (A) is preferably in the following range based on the total amount of the component (A) and the component (B).
• the content of the component (A) is preferably 90% by mass or more, more preferably 93% by mass or more, still more preferably 95% by mass or more, and particularly preferably 97% by mass or more from the viewpoint of easily obtaining excellent moldability. preferable.
• the content of the component (A) is preferably 99.94% by mass or less, more preferably 99.9% by mass or less, from the viewpoint of easily obtaining an excellent appearance of the surface of the molded body (sheet or the like). 5 mass% or less is still more preferable, and 99 mass% or less is especially preferable.
• component (A) is preferably 90 to 99.94% by mass, more preferably 93 to 99.9% by mass, still more preferably 95 to 99.5% by mass, and 97 to 99% by mass. % Is particularly preferred.
• component (B) component: polyalkylene terephthalate resin examples include polyethylene terephthalate resin, polypropylene terephthalate resin, and polybutylene terephthalate resin.
• the intrinsic viscosity of the component (B) measured based on JIS K7233 is preferably in the following range.
• the intrinsic viscosity is preferably 0.6 or more, more preferably 0.7 or more, still more preferably 0.9 or more, from the viewpoint of easily obtaining excellent conductivity (low resistance value; the same applies hereinafter). 0 or more is particularly preferable.
• the intrinsic viscosity is preferably 1.5 or less, more preferably 1.4 or less, and more preferably 1.2 or less from the viewpoint of improving the dispersibility of the component (B) with respect to other resin components (component (A) and the like). Further preferred. From these viewpoints, the intrinsic viscosity is preferably 0.6 to 1.5, more preferably 0.7 to 1.4, still more preferably 0.9 to 1.2, and 1.0 to 1.2. Particularly preferred.
• the content of the component (B) is preferably in the following range based on the total amount of the component (A) and the component (B).
• the content of the component (B) is preferably 0.06% by mass or more, more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, from the viewpoint of easily obtaining excellent conductivity. 1.5 mass% or more is especially preferable, and 2.0 mass% or more is very preferable.
• the content of the component (B) is preferably 10% by mass or less, more preferably 5.0% by mass or less, and still more preferably 3.0% by mass or less from the viewpoint that an excellent appearance of the molded body can be easily obtained.
• the content of the component (B) is preferably 0.06 to 10% by mass, more preferably 0.5 to 5.0% by mass, still more preferably 1.0 to 3.0% by mass, 1.5 to 3.0% by mass is particularly preferred, and 2.0 to 3.0% by mass is very particularly preferred.
• component (C) component carbon material
• Examples of the carbon material as component (C) include carbon black, graphite, carbon fiber, carbon nanotube, carbon nanocoil, and carbon nanosphere.
• Carbon black classification includes furnace type, acetylene type, ketjen type and the like. Among these, furnace-type carbon black is preferable from the viewpoint of easily obtaining excellent recyclability.
• the specific surface area of carbon black is preferably 30 m 2 / g or more, more preferably 40 m 2 / g or more, and still more preferably 50 m 2 / g or more, from the viewpoint that excellent conductivity can be easily obtained.
• the specific surface area of the carbon black, good dispersibility can be easily obtained carbon black, from the viewpoint of excellent appearance can be easily obtained on the surface of the molded product (sheet) is preferably not more than 90m 2 / g, 75m 2 / G or less is more preferable, and 60 m 2 / g or less is still more preferable.
• the specific surface area of the carbon black preferably from 30 ⁇ 90m 2 / g, more preferably from 40 ⁇ 75m 2 / g, more preferably 50 ⁇ 60m 2 / g.
• the specific surface area of the carbon black may be 50 to 90 m 2 / g.
• the specific surface area can be measured in accordance with a test method for basic performance of carbon black for JIS K6217 rubber.
• the specific surface area is indicated by the surface area (m 2 ) per unit mass (g) of carbon black.
• the specific surface area can be obtained by immersing degassed carbon black in liquid nitrogen and measuring the amount of nitrogen adsorbed on the surface of the carbon black at equilibrium.
• the DBP oil absorption amount of the carbon black is preferably 100 ml / 100 g or more, more preferably 130 ml / 100 g or more, further preferably 150 ml / 100 g or more, and more than 150 ml / 100 g from the viewpoint of easily obtaining excellent conductivity. Particularly preferably, 160 ml / 100 g or more is very preferable, and 170 ml / 100 g or more is very preferable.
• the DBP oil absorption amount of the carbon black is preferably 300 ml / 100 g or less, from the viewpoint that the excellent dispersibility of the carbon black can be easily obtained, and the excellent appearance of the surface of the molded body (sheet, etc.) can be easily obtained.
• the DBP oil absorption amount of carbon black is preferably 100 to 300 ml / 100 g, more preferably 130 to 300 ml / 100 g, further preferably 150 to 300 ml / 100 g, more than 150 ml / 100 g and not more than 300 ml / 100 g. Particularly preferred is 160 to 220 ml / 100 g, very preferred is 170 to 200 ml / 100 g.
• DBP n-dibutyl phthalate, Di-butyl phthalate
• oil absorption can be measured according to the basic performance test method of carbon black for JIS K6217 rubber.
• the DBP oil absorption is correlated with the bonding force between the carbon black particles, and a large DBP oil absorption means that the structure is long.
• both the specific surface area and the DBP oil absorption amount satisfy the preferable range.
• the specific surface area is 30 to 90 m 2 / g and the DBP oil absorption is 100 to 300 ml / 100 g is preferable.
• the content of the component (C) is 10 to 45 parts by mass with respect to a total of 100 parts by mass of the component (A) and the component (B).
• the content of the component (C) is less than 10 parts by mass, sufficient conductivity cannot be obtained in the molded body.
• content of (C) component exceeds 45 mass parts, a viscosity will increase and shaping
• molding stability will fall.
• the content of the component (C) is preferably 13 parts by mass or more and 15 parts by mass or more with respect to a total of 100 parts by mass of the component (A) and the component (B) from the viewpoint of easily obtaining excellent conductivity.
• the content of the component (C) is preferably 40 parts by mass or less, and preferably 30 parts by mass or less with respect to a total of 100 parts by mass of the component (A) and the component (B), from the viewpoint that molding stability is easily improved. More preferred is 27 parts by mass or less, and particularly preferred is 25 parts by mass or less.
• the content of the component (C) is preferably 10 to 40 parts by mass, more preferably 13 to 30 parts by mass with respect to 100 parts by mass in total of the components (A) and (B), Is more preferably 27 parts by weight, particularly preferably 15 to 25 parts by weight, very preferably 17 to 25 parts by weight, very preferably 20 to 25 parts by weight, and even more preferably 21 to 25 parts by weight.
• the graft copolymer which is (D) component has a structure provided with a core part (core material) and the coating
• the component (D) may have a core-shell type structure including, for example, a core layer (core portion) and a shell layer (covering portion) that covers the core layer.
• coated part can be comprised from a mutually different polymer.
• Each of the core part and the covering part may have a plurality of layers.
• the covering portion may cover a part of the core portion or may cover the entire core portion.
• a component can be obtained by making the structural component of a coating
• the core is selected from the group consisting of acrylic rubber (polymer having a structural unit derived from a monomer having an acryloyl group) and silicone rubber from the viewpoint of further suppressing the decrease in conductivity during recycling. It is preferable to include at least one type, and it is more preferable to include acrylic rubber.
• the constituent component of the core is not limited to acrylic rubber and silicone rubber, and polybutadiene or the like may be used.
• the acrylic rubber a polymer having a structural unit derived from a monomer having an acryloyl group as a main structural unit can be used.
• the content of the structural unit derived from the monomer having an acryloyl group is preferably 50 to 100% by mass, based on the total mass of the acrylic rubber, from the viewpoint of easily obtaining excellent recyclability, and preferably 70 to 100%.
• the mass% is more preferable.
• An acrylic ester can be used as the monomer having an acryloyl group.
• the acrylate ester include an alkyl acrylate ester having an alkyl group having 2 to 8 carbon atoms, and examples thereof include ethyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, and the like.
• the acrylic rubber may have a structural unit derived from other components other than the acrylic ester.
• a vinyl monomer copolymerizable with an acrylate ester is preferable from the viewpoint of easily obtaining a copolymer at low cost.
• vinyl monomers copolymerizable with acrylic acid esters include aromatic vinyl compounds such as styrene and ⁇ -methylstyrene; alkyl methacrylates such as methyl methacrylate and ethyl methacrylate; unsaturated compounds such as acrylonitrile and methacrylonitrile.
• acrylic rubber examples include silicone / acrylic rubber (a composite polymer having a structural unit derived from a monomer having an acryloyl group (acrylic component) and a structural unit derived from a silicone component. For example, derived from an alkyl acrylate. And a polymer having a structural unit and a polyorganosiloxane skeleton).
• silicone rubber polyorganosiloxane can be used.
• polyorganosiloxane which is a linear polymer having an organosiloxane bond unit of several thousand or more can be used.
• the silicone rubber may be produced by any method, but a rubber obtained by an emulsion polymerization method is preferable.
• the polyorganosiloxane is not particularly limited, but a polyorganosiloxane having a vinyl polymerizable functional group is preferable.
• the polyorganosiloxane can be obtained using dimethylsiloxane.
• Dimethylsiloxane may be chain-like or cyclic.
• Examples of dimethylsiloxane include dimethylsiloxane-based cyclics having 3 or more member rings, and 3- to 7-membered dimethylsiloxane cyclics are preferable. Specific examples include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
• Dimethylsiloxane may be used alone or in combination of two or more.
• the coating part constituting the component (D) has a structure derived from an unsaturated carboxylic acid ester from the viewpoint of improving the dispersibility of the component (D) relative to other resin components (component (A), component (B), etc.).
• Units, structural units derived from vinyl compounds (excluding unsaturated carboxylic esters), structural units derived from maleimide compounds, structural units derived from unsaturated dicarboxylic acids, and structural units derived from unsaturated dicarboxylic anhydrides It is preferable to include a polymer having at least one selected from the group consisting of:
• Examples of the vinyl compound include glycidyl group-containing vinyl compounds, aliphatic vinyl compounds, aromatic vinyl compounds, and vinyl cyanide compounds.
• a compound that corresponds to a glycidyl group-containing vinyl compound and that corresponds to an aliphatic vinyl compound, an aromatic vinyl compound, or a vinyl cyanide compound belongs to the glycidyl group-containing vinyl compound.
• component (D) From the viewpoint of improving the dispersibility of component (D) relative to other resin components (component (A), component (B), etc.), structural units derived from unsaturated carboxylic acid esters, structures derived from glycidyl group-containing vinyl compounds
• a polymer having at least one selected from the group consisting of a unit and a structural unit derived from an unsaturated dicarboxylic acid anhydride is preferred, and a polymer having a structural unit derived from an unsaturated carboxylic acid ester is more preferred.
• coated part may be used individually by 1 type, and may use 2 or more types together.
• unsaturated carboxylic acid esters examples include unsaturated carboxylic acid alkyl esters and unsaturated carboxylic acid aryl esters.
• unsaturated carboxylic acid ester a (meth) acrylic acid ester can be used.
• acrylic acid esters include (meth) acrylic acid alkyl esters and (meth) acrylic acid aryl esters.
• the unsaturated carboxylic acid alkyl ester is preferably a (meth) acrylic acid alkyl ester from the viewpoint of improving the dispersibility of the (D) component with respect to other resin components (component (A), component (B), etc.).
• (meth) acrylic acid alkyl esters include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, and t-butyl (meth) acrylate.
• (meth) acrylic acid alkyl ester from the viewpoint that the effect of improving the dispersibility of the (D) component with respect to other resin components ((A) component, (B) component, etc.) is large, methyl (meth) acrylate and At least one selected from the group consisting of n-butyl (meth) acrylate is preferred.
• the unsaturated carboxylic acid aryl ester is preferably a (meth) acrylic acid aryl ester from the viewpoint of improving the dispersibility of the component (D) with respect to other resin components (component (A), component (B), etc.).
• the (meth) acrylic acid aryl ester include phenyl (meth) acrylate, dimethylphenyl (meth) acrylate, and naphthyl (meth) acrylate.
• Examples of the glycidyl group-containing vinyl compound include glycidyl (meth) acrylate, glycidyl itaconate, diglycidyl itaconate, allyl glycidyl ether, styrene-4-glycidyl ether, 4-glycidyl styrene, and the like.
• glycidyl group-containing vinyl compound glycidyl (meth) acrylate is preferable from the viewpoint of a large effect of improving impact resistance.
• a glycidyl group containing vinyl compound may be used individually by 1 type, and may use 2 or more types together.
• aliphatic vinyl compound examples include ethylene, propylene, and butadiene.
• Aromatic vinyl compounds include styrene, ⁇ -methylstyrene, p-aminostyrene, 1-vinylnaphthalene, 4-methylstyrene, 4-propylstyrene, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4- Benzylstyrene, 4- (phenylbutyl) styrene, halogenated styrene, 2-styryl-oxazoline and the like.
• the vinyl cyanide compound examples include acrylonitrile, methacrylonitrile, ethacrylonitrile and the like.
• vinyl compounds include acrylamide, methacrylamide, N-methylacrylamide, butoxymethylacrylamide, N-propylmethacrylamide, N-vinyldiethylamine, N-acetylvinylamine, allylamine, methallylamine, N-methylallylamine, 2-iso Examples include propenyl-oxazoline and 2-vinyl-oxazoline.
• Maleimide compounds include maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-isopropylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, N- (p-bromophenyl) maleimide, N- ( Chlorophenyl) maleimide and the like.
• unsaturated dicarboxylic acid include maleic acid, itaconic acid, and phthalic acid.
• an acrylic rubber (a polymer having a structural unit derived from a monomer having an acryloyl group) from the viewpoint of further improving the effect of suppressing a decrease in conductivity during recycling.
• a graft copolymer is preferable, and at least one selected from the group consisting of the following component (DI) and the following component (D-II) is more preferable, and the component (D-II) is more preferable.
• Component (DI) a polymer having at least one selected from the group consisting of a core containing silicone / acrylic rubber, a structural unit derived from an unsaturated carboxylic acid ester, and a structural unit derived from a vinyl compound A graft copolymer having a core-shell structure.
• Component A graft copolymer having a core-shell structure comprising a core containing acrylic rubber and a coating containing a polymer having a structural unit derived from an unsaturated carboxylic acid ester.
• the component (DI) is a group consisting of a structural unit derived from an unsaturated carboxylic acid alkyl ester and a structural unit derived from a vinyl compound, from the viewpoint of further improving the effect of suppressing a decrease in conductivity during recycling. It is preferable to include a coating portion containing a polymer having at least one selected from at least one selected from the group consisting of a structural unit derived from methyl (meth) acrylate and a structural unit derived from a glycidyl group-containing vinyl compound. It is more preferable to provide a covering portion including a polymer having one kind. Examples of commercially available (DI) components include Methrene S-2001, Methbrene S-2006, Methbrene S-2200 manufactured by Mitsubishi Rayon Co., Ltd. and the like.
• the component (D-II) preferably includes a covering portion containing a polymer having a structural unit derived from an unsaturated carboxylic acid alkyl ester, from the viewpoint of further improving the effect of suppressing a decrease in conductivity during recycling. It is more preferable to provide a coating portion containing a polymer having a structural unit derived from methyl (meth) acrylate.
• Commercially available products of component (D-II) include Paraloid BPM-500 and Paraloid BPM-515 manufactured by Rohm & Haas Japan Co., Ltd .; Metabrene W-450A and Metabrene W-600A manufactured by Mitsubishi Rayon Co., Ltd. .
• the content of the component (D) is 0.5 to 35 parts by mass with respect to a total of 100 parts by mass of the component (A) and the component (B). When the content of the component (D) is less than 0.5 parts by mass, sufficient recyclability cannot be obtained.
• the content of the component (D) is preferably 1 part by mass or more with respect to a total of 100 parts by mass of the component (A) and the component (B), from the viewpoint of further improving the effect of suppressing the decrease in conductivity during recycling. 2 parts by mass or more is more preferable, 5 parts by mass or more is further preferable, 7 parts by mass or more is particularly preferable, 8 parts by mass or more is extremely preferable, and 10 parts by mass or more is very preferable.
• the content of the component (D) exceeds 35 parts by mass, sufficient recyclability cannot be obtained and the appearance of the molded article is deteriorated.
• the content of the component (D) is such that the effect of suppressing the decrease in conductivity during recycling is further excellent, and from the viewpoint of obtaining a more excellent appearance of the molded body, the components (A) and (B) 30 mass parts or less are preferable with respect to a total of 100 mass parts, 20 mass parts or less are more preferable, 18 mass parts or less are still more preferable, 15 mass parts or less are especially preferable, and 12 mass parts or less are very preferable.
• the content of the component (D) is preferably 0.5 to 30 parts by mass, more preferably 1 to 20 parts by mass with respect to 100 parts by mass in total of the components (A) and (B). 2 to 20 parts by mass is more preferable, 5 to 18 parts by mass is particularly preferable, 7 to 15 parts by mass is very preferable, 8 to 12 parts by mass is very preferable, and 10 to 12 parts by mass is even more preferable.
• the polycarbonate resin composition according to the present embodiment if necessary, known resins other than the above components (polyamide resin, polyimide resin, polystyrene resin, ABS resin, polyolefin resin (polyethylene resin, polypropylene resin, etc.), phenol resin, Epoxy resin and the like).
• the polycarbonate resin composition according to the present embodiment can contain known additives other than the above components, if necessary.
• additives include antioxidants (phosphorous antioxidants, phenolic antioxidants, etc.), mold release agents (glycerin fatty acid esters, etc.), lubricants (paraffin wax, n-butyl stearate, synthetic beeswax, Natural beeswax, glycerin monoester, montanic acid wax, polyethylene wax, pentaerythritol tetrastearate, etc.), colorant (titanium oxide, dye, pigment, etc.), filler (calcium carbonate, clay, silica, glass fiber, glass bulb, Glass flakes, talc, mica, various whiskers, etc.), fluidity improvers, spreading agents (epoxidized soybean oil, liquid paraffin, etc.), flame retardants (bromine compounds, phosphorus compounds, organometallic salt compounds, silicones) And the like, etc.).
• the polycarbonate resin composition according to this embodiment can be obtained by mixing constituent components.
• the molded body (molded article) according to the present embodiment includes the polycarbonate resin composition according to the present embodiment.
• the molded body according to the present embodiment may be a film shape or a flat plate shape.
• Examples of the molded body according to this embodiment include a film, a tape, and a sheet.
• the container for example, container for conveyance or storage of an electronic component which accommodates an electronic component is mentioned, for example.
• Examples of the molded body according to this embodiment include a carrier tape.
• the carrier tape according to the present embodiment includes the polycarbonate resin composition according to the present embodiment.
• the carrier tape according to the present embodiment may be in the form of a film or a plate.
• the carrier tape according to the present embodiment may have an accommodating portion capable of accommodating an object (such as an electronic component). For example, a plurality of pocket portions (for example, spaced apart in the longitudinal direction of the tape) A recess for accommodating the object).
• Examples of the film include a molded body having a width (film width) of 100 to 1500 mm and a thickness of 0.05 to 0.5 mm.
• Examples of the tape carrier tape or the like
• Examples of the sheet include a molded body having a width (sheet width) of 100 to 1500 mm and a thickness of 0.7 to 10 mm.
• the method for producing a molded body according to the present embodiment includes a molding step of molding the polycarbonate resin composition according to the present embodiment to obtain a molded body.
• the method for producing a molded body according to the present embodiment may include a plurality of molding steps, for example, a step of obtaining a resin composition by melting a molded body including the polycarbonate resin composition according to the present embodiment; You may further provide the process of shape
• the method for producing a carrier tape according to the present embodiment includes a molding step of molding the polycarbonate resin composition according to the present embodiment to obtain a carrier tape.
• the carrier tape manufacturing method according to the present embodiment may include a plurality of molding steps, for example, a step of obtaining a resin composition by melting the polycarbonate resin composition according to the present embodiment, and the resin composition And a step of obtaining a carrier tape.
• Examples of a molding method for imparting a concave portion called a pocket portion to the carrier tape include a pressure forming method, a press molding method, and a vacuum rotary molding method.
• Polycarbonate resin A-1: Polycarbonate resin synthesized from bisphenol A and phosgene, manufactured by Sumika Stylon Polycarbonate Co., Ltd., Caliber 200-13 (viscosity average molecular weight: 21000)
• Polyalkylene terephthalate resin B-1: Polybutylene terephthalate resin, manufactured by Polyplastics Co., Ltd., DURANEX 600FP (Intrinsic viscosity: 1.0)
• C-1 Furnace type carbon black, manufactured by Cabot, Vulcan XC-305 (specific surface area: 70 m 2 / g, DBP oil absorption: 130 ml / 100 g)
• C-2 Furnace type carbon black, manufactured by Mitsubishi Chemical Corporation, # 3050B (specific surface area: 50 m 2 / g, DBP oil absorption: 175 ml / 100 g)
• [Graft copolymer] D-1 Core-shell type graft copolymer (core layer: silicone-acrylic rubber, shell layer: polymer having a structural unit derived from a polymer having a structural unit derived from an unsaturated carboxylic acid alkyl ester, (D -I) Ingredient), manufactured by Mitsubishi Rayon Co., Ltd., Metabrene S-2001 D-2: Core-shell type graft copolymer (core layer: acrylic rubber, shell layer: polymer having a structural unit derived from unsaturated carboxylic acid alkyl ester, component (D-II)), manufactured by Mitsubishi Rayon Co., Ltd.
• Methabrene W-450A D-3 Core-shell type graft copolymer (core layer: polybutadiene, shell layer: polymer having a structural unit derived from alkyl (meth) acrylate), manufactured by Rohm and Haas Japan, Paraloid EXL2603
• Tables 1 to 3 show the evaluation results.
• Comparative Example 1 was a case where the content of the carbon material was small, and the conductivity and recyclability were inferior.
• Comparative Example 2 was a case where the content of the carbon material was large, and the viscosity became too high, and the molding itself was difficult.
• Comparative Example 3 was a case where the content of the graft copolymer was small, and the recyclability was inferior.
• the comparative example 4 is a case where there is much content of a graft copolymer, and recyclability and the external appearance of a flat plate were inferior.
• Comparative Example 5 was a case where no graft copolymer was used, and the conductivity, recyclability, and flat plate appearance were poor.
• the comparative example 6 is a case where there is little content of a carbon material, and electroconductivity, recyclability, and the external appearance of the flat plate were inferior.
• the present invention it is possible to suppress a decrease in conductivity even when it is repeatedly molded.
• the decrease in conductivity can be suppressed to an extremely low level.

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