JP2007112979A - Antistatic resin composition, molded product and laminate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antistatic resin composition capable of inhibiting contamination of a material to be contacted and peripheral equipments thereof when the resin composition is molded into a product, and having excellent impact resistance and antistatic property. <P>SOLUTION: The antistatic resin composition comprises a polymer type antistatic agent, and rubber-reinforced copolymer resin (A1) obtained by polymerizing a monomer component containing at least one of methyl methacrylate and an aromatic vinyl compound under the presence of a rubbery polymer, or a mixture of the rubber-reinforced copolymer resin (A1) and (co)polymer (A2) of the above-described monomer component, having a content of the rubbery polymer of from 5 to 40 mass%, and a total amount of detected materials upon measurement of pyrolysis GC for a retention time from 10 to 24 min of 20,000 μg or less relative to 1g of the composition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an antistatic resin composition excellent in impact resistance and antistatic properties, a molded body, and a laminate.

In recent years, thermoplastic resins have been widely used as molding materials for holding members, protective members, support members, containers and the like of electronic devices. As this thermoplastic resin, it is said that rubber reinforced resin such as ABS resin, olefin resin and the like are preferable.
In the above applications, if unreacted monomers, oligomers, solvents, reaction aids, etc. remain in the thermoplastic resin or the composition containing the same, during the holding or transportation of electronic devices, etc., these The component may adhere to the electronic device due to volatilization or the like, and the performance of the device may deteriorate and the appearance may deteriorate. Patent Document 1 discloses a thermoplastic resin composition that gives a molded article that has an extremely small amount of outgas generation and that is excellent in antistatic properties (antistatic properties). A method is disclosed.

JP-A-2005-139215

  An object of the present invention is to provide an antistatic resin composition excellent in impact resistance and antistaticity, which can suppress contamination of the contacted object and its peripheral equipment due to the residual substances and the like when formed into a molded body. Another object is to provide a molded body and a laminate including the same.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a composition containing a specific rubber-reinforced resin and a polymer-type antistatic agent is suitable, and complete the present invention. It came. Specifically, it was found that the detection substance when pyrolysis gas chromatography measurement was performed under specific conditions was related to the above problem, and in order to solve the problem, a specific amount with a small amount of vinyl cyanide compound was used. It has been found that the above-mentioned problems can be solved by using a rubber-reinforced resin.

The present invention is shown below.
1. The following component [A] 70-95 mass% and component [B] 5-30 mass% [however, [A] + [B] = 100 mass%. A composition containing a rubbery polymer (a) having a content of 5 to 40% by mass, a thermal decomposition temperature of 423 ° C., and a thermal decomposition time of 30 seconds. An antistatic resin composition characterized in that, when the measurement is performed, the total amount of the detection substance during a retention time of 10 to 24 minutes is 20,000 μg or less with respect to 1 g of the present composition.
Component [A]; monomer (b1) comprising methyl methacrylate and / or aromatic vinyl compound in the presence of 5 to 80 parts by mass of rubbery polymer (a), vinyl cyanide compound (B2) Monomer component (b) consisting of 0 to 10% by mass and another monomer copolymerizable with these compounds (b3) 0 to 30% by mass (provided that (b1) + (b2) + (B3) = 100% by mass. ] 20 to 95 parts by mass [wherein (a) + (b) = 100 parts by mass. ] Or a mixture comprising the rubber-reinforced copolymer resin (A1) and the (co) polymer (A2) of the monomer component (b). .
Component [B]; polymer type antistatic agent.
2. The monomer (b1) is 10 to 90% by mass of methyl methacrylate and 90 to 10% by mass of an aromatic vinyl compound [however, the total of these is 100% by mass. The antistatic resin composition according to 1 above, wherein
3. 3. The antistatic resin composition according to 1 or 2 above, which is a molding material for an electronic device container or an electronic device manufacturing facility.
4). A molded product comprising the antistatic resin composition according to any one of 1 to 3 above.
5. A laminate comprising a molded article comprising the antistatic resin composition according to any one of the above 1 to 3 laminated on at least one surface of a support containing a thermoplastic polymer.

The antistatic resin composition of the present invention is a molding material for forming an electronic device container (including a holding member and a support member); a wall, a covering (including a protective member), and an electronic device manufacturing facility such as a transport container. It is suitable as a molding material to be formed, does not emit odor during and after the production of the molded product, and can easily obtain a molded product excellent in impact resistance and antistatic properties, and is in contact with the molded product. Contamination of objects and surrounding facilities can be suppressed.
According to the molded body of the present invention, the Charpy impact strength can be 8 kJ / m ² or more, and the surface resistivity at a temperature of 23 ° C. and a humidity of 50% RH is 1 × 10 ⁸ to 1 × 10 ¹¹ Ω. It can be.
Moreover, according to the laminated body of this invention, the contamination of the to-be-contacted object which contacts in the molded object surface and its peripheral equipment can be suppressed.

Hereinafter, the present invention will be described in detail.
In the present specification, “(co) polymerization” means homopolymerization and copolymerization, and “(meth) acryl” means acrylic and methacrylic.
The “number average molecular weight” and “weight average molecular weight” are measured by gel permeation chromatography (GPC).

1. Antistatic Resin Composition The antistatic resin composition of the present invention (hereinafter also simply referred to as “the composition of the present invention”) includes a specific resin component produced using a rubbery polymer and a polymer. The composition contains a mold antistatic agent, the content of the rubber-like polymer in the composition is 5 to 40% by mass, and the thermal decomposition temperature is 423 ° C. and thermal decomposition with respect to 1 g of the present composition. When pyrolysis gas chromatography measurement is performed under conditions of a time of 30 seconds, the total amount of the detection substance during the retention time of 10 to 24 minutes has a property of 20,000 μg or less.

1-1. Ingredient [A]
This component [A] is composed of at least one rubber-reinforced copolymer resin (A1) or at least one rubber-reinforced copolymer resin (A1) and a (co) polymer of the monomer component (b). It is a mixture composed of one or more kinds (hereinafter, this component [A] may be referred to as “rubber reinforced resin [A]”).
The rubbery polymer (a) used for forming the rubber-reinforced copolymer resin (A1) may be a homopolymer or a copolymer. These may be used alone or in combination. Further, the rubbery polymer (a) may be a non-crosslinked polymer or a crosslinked polymer.

As the rubbery polymer (a), either a diene polymer or a non-diene polymer may be used. Moreover, these can also be used in combination.
Diene polymers include homopolymers such as polybutadiene and polyisoprene; styrene / butadiene copolymers such as styrene / butadiene copolymers, styrene / butadiene / styrene copolymers, and acrylonitrile / styrene / butadiene copolymers. Styrene / isoprene copolymers, styrene / isoprene / styrene copolymers, styrene / isoprene copolymers such as acrylonitrile / styrene / isoprene copolymers; hydrides of the above (co) polymers, and the like.
Examples of non-diene polymers include polyolefin homopolymers; ethylene / α-olefin copolymers such as ethylene / propylene copolymers and ethylene / butene-1 copolymers; ethylene / propylene / 5-ethylidene-2 -Ethylene / α-olefin / non-conjugated diene copolymer such as norbornene copolymer, ethylene / butene-1 / 5-ethylidene-2-norbornene copolymer; urethane rubber; acrylic rubber; silicone rubber; Examples include acrylic IPN rubber.
Of these, diene polymers are preferred, and polybutadiene, styrene / butadiene copolymers and the like are particularly preferred.
Each (co) polymer may be a block (co) polymer or a random (co) polymer.

  The rubbery polymer (a) is preferably in the form of particles, and the volume average particle diameter is preferably 200 to 400 nm, more preferably 200 to 350 nm, and still more preferably 250 to 350 nm. is there. When the volume average particle diameter is in the above range, the impact resistance is particularly excellent. The volume average particle diameter can be measured by a laser diffraction method, a light scattering method, or the like.

  The method for producing the rubbery polymer (a) includes emulsion polymerization and solution polymerization. As described above, emulsion polymerization is preferable in order to adjust to a preferable average particle diameter and the like. To adjust the specific average particle size (particle size distribution) by emulsion polymerization, the type of emulsifier and the amount used, the type and amount of initiator used, the polymerization time, the polymerization temperature, the stirring conditions, etc. are selected. Is possible. Another method for adjusting the average particle size (particle size distribution) may be a method of blending two or more kinds of rubbery polymers (a) having different particle sizes.

  If the rubbery polymer (a) has a volume average particle diameter within the above range, for example, JP-B-4-79366, JP-A-59-93701, JP-A-56-167704. What was enlarged by well-known methods, such as the method described in gazette etc., can also be used.

  The monomer component (b) used for forming the rubber-reinforced copolymer resin (A1) includes a monomer (b1) composed of methyl methacrylate and / or an aromatic vinyl compound. That is, this monomer (b1) may be only methyl methacrylate, only an aromatic vinyl compound, or methyl methacrylate and an aromatic vinyl compound.

  The aromatic vinyl compound is not particularly limited as long as it is a compound having at least one vinyl bond and at least one aromatic ring. Examples thereof include styrene, α-methyl styrene, o-methyl styrene, p-methyl styrene, vinyl toluene, β-methyl styrene, ethyl styrene, p-tert-butyl styrene, vinyl xylene, vinyl naphthalene, monochlorostyrene, dichloromethane. Examples thereof include styrene, monobromostyrene, dibromostyrene, and fluorostyrene. Of these, styrene and α-methylstyrene are preferred. Moreover, this aromatic vinyl compound can be used individually by 1 type or in combination of 2 or more types.

  The ratio in the case of combining methyl methacrylate and an aromatic vinyl compound is preferably 10 to 90% by mass / 90 to 10% by mass, more preferably 10 to 80% by mass / 90 to 20% by mass, still more preferably in this order. It is 20-80 mass% / 80-20 mass%. Within this range, the transparency is excellent.

The monomer component (b) further contains a vinyl cyanide compound (b2) and the like as necessary.
Examples of the vinyl cyanide compound (b2) include acrylonitrile and methacrylonitrile. Of these, acrylonitrile is preferred.

  Moreover, the said monomer component (b) contains the other monomer (b3) copolymerizable with the said monomer (b1) and a vinyl cyanide compound (b2) as needed. Examples of the monomer (b3) include (meth) acrylic acid ester compounds other than methyl methacrylate (b1); maleimide compounds; acid anhydrides; vinyl compounds having a functional group. These may be used in combination.

  Examples of the (meth) acrylic acid ester compound include ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-hexyl methacrylate, and methyl acrylate. , Ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, tert-butyl acrylate, n-hexyl acrylate, and the like. These can be used alone or in combination of two or more.

Examples of the maleimide compounds include maleimide, N-methylmaleimide, N-butylmaleimide, N-phenylmaleimide, N- (2-methylphenyl) maleimide, N- (4-hydroxyphenyl) maleimide, N-cyclohexylmaleimide and the like. Can be mentioned. These can be used alone or in combination of two or more. In addition, as another method for introducing a unit composed of a maleimide compound, for example, a method in which maleic anhydride is copolymerized and then imidized may be used.
Examples of the acid anhydride include maleic anhydride, itaconic anhydride, citraconic anhydride, and the like. These can be used alone or in combination of two or more.

  Examples of the vinyl compound having a functional group include compounds having a hydroxyl group such as 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate and hydroxystyrene; N, N-dimethylaminomethyl methacrylate, N, acrylic acid, Compounds having an amino group such as N-dimethylaminomethyl, N, N-diethyl-p-aminomethylstyrene; glycidyl methacrylate, glycidyl acrylate, 3,4-oxycyclohexyl methacrylate, 3,4-oxycyclohexyl acrylate , Compounds having an epoxy group such as vinyl glycidyl ether, methallyl glycidyl ether, allyl glycidyl ether; compounds having an amide group such as methacrylamide and acrylamide; compounds having a carboxyl group such as methacrylic acid and acrylic acid Compounds having an oxazoline group and vinyl oxazoline. These can be used individually by 1 type or in combination of 2 or more types.

  The proportions of the monomer (b1), the vinyl cyanide compound (b2) and the monomer (b3) constituting the monomer component (b) are as follows when the total of these is 100% by mass: 60-100% by mass, 0-10% by mass and 0-30% by mass, preferably 65-100% by mass, 0-10% by mass and 0-25% by mass, more preferably 75-100% by mass, 0 -5% by mass and 0-20% by mass, more preferably 100% by mass, 0% by mass and 0% by mass. When the usage rate of the monomer (b1) is too small and when the usage rate of the monomer (b3) is too high, the residue in the PyGC measurement tends to increase. Further, when the amount of the vinyl cyanide compound used is too large, the total amount of the detection substance may be large, and the color tone change (yellowing) of the molded product tends to occur.

The rubber-reinforced copolymer resin (A1) is obtained by polymerizing the monomer component (b) in the presence of the rubber polymer (a). Emulsion polymerization, solution polymerization, bulk polymerization, suspension polymerization and the like can be applied. Of these, emulsion polymerization is preferred.
When the rubber-reinforced copolymer resin (A1) is produced, the rubber polymer (a) and the monomer component (b) are present in the reaction system in the total amount of the rubber polymer (a). Below, the monomer component (b) may be added all at once, or divided or continuously. Moreover, the method which combined these may be used. Furthermore, you may superpose | polymerize by adding the whole quantity or one part of rubber-like polymer (a) in the middle of superposition | polymerization.
When producing 100 parts by mass of the rubber-reinforced copolymer resin (A1), the amount of the rubbery polymer (a) used is preferably 5 to 80 parts by mass, more preferably 10 to 70 parts by mass, and still more preferably 15 to 60 parts by mass.

When the rubber-reinforced copolymer resin (A1) is produced by emulsion polymerization, a polymerization initiator, a chain transfer agent (molecular weight regulator), an emulsifier, water and the like are used. In addition, as long as it does not inhibit reaction, the below-mentioned additive which can be mix | blended with the composition of this invention may be added to a reaction system.
As the polymerization initiator, a redox in which an organic peroxide such as cumene hydroperoxide, diisopropylbenzene hydroperoxide, paramentane hydroperoxide, or the like and a reducing agent such as a sugar-containing pyrophosphate formulation or a sulfoxylate formulation are combined. System initiators; persulfates such as potassium persulfate; peroxides such as benzoyl peroxide (BPO), lauroyl peroxide, tert-butyl peroxylaurate, and tert-butyl peroxymonocarbonate. These can be used alone or in combination of two or more. Furthermore, the polymerization initiator can be added to the reaction system all at once or continuously. Moreover, the usage-amount of the said polymerization initiator is 0.1-1.5 mass% normally with respect to the said monomer component (b) whole quantity, Preferably it is 0.2-0.7 mass%.

  Examples of the chain transfer agent include mercaptans such as octyl mercaptan, n-dodecyl mercaptan, tert-dodecyl mercaptan, n-hexyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl mercaptan, tert-tetradecyl mercaptan, terpinolene, α -A dimer of methylstyrene or the like. These can be used alone or in combination of two or more. The amount of the chain transfer agent used is usually 0.05 to 2.0% by mass with respect to the total amount of the monomer component (b).

  As the above-mentioned emulsifiers, higher alcohol sulfates, alkylbenzene sulfonates such as sodium dodecylbenzene sulfonate, aliphatic sulfonates such as sodium lauryl sulfate, higher aliphatic carboxylates, anionic surfactants such as phosphates Agents: Nonionic surfactants such as polyethylene glycol alkyl ester type and alkyl ether type. These can be used alone or in combination of two or more. The usage-amount of the said emulsifier is 0.3-5.0 mass% normally with respect to the said monomer component (b) whole quantity.

The latex obtained by emulsion polymerization is usually purified by coagulation with a coagulant to make the polymer component into powder, and then washing and drying. Examples of the coagulant include inorganic salts such as calcium chloride, magnesium sulfate, magnesium chloride, and sodium chloride; inorganic acids such as sulfuric acid and hydrochloric acid; organic acids such as acetic acid and lactic acid.
In the case where a plurality of rubber-reinforced copolymer resins (A1) are used in combination, they may be mixed after being isolated, but as another method, they are mixed after producing a latex containing each resin, Then, it can be set as the mixed rubber-reinforced copolymer resin (A1) by solidifying.

When manufacturing the said rubber | gum reinforcement | strengthening copolymer resin (A1) by solution polymerization, block polymerization, or suspension polymerization, it can carry out by a conventional method.
In the case of solution polymerization, the monomer component (b) is usually dissolved in an aromatic hydrocarbon such as toluene or ethylbenzene; ketones such as methyl ethyl ketone; an inert polymerization solvent such as acetonitrile, dimethylformamide, or N-methylpyrrolidone. Alternatively, polymerization may be performed in the presence of a polymerization initiator, or thermal polymerization may be performed in the absence of a polymerization initiator. In addition, the polymerization temperature in the case of solution polymerization is 100-150 degreeC normally, Preferably it is 100-130 degreeC.

The graft ratio of the rubber-reinforced copolymer resin (A1) is preferably 10 to 150%, more preferably 10 to 100%, and still more preferably 10 to 60%. When the graft ratio of the rubber-reinforced copolymer resin (A1) is less than 10%, the surface appearance and impact resistance of the composition of the present invention and a molded article containing the composition may be lowered. On the other hand, if it exceeds 150%, the moldability may be inferior.
Here, the graft ratio is x grams of a rubber component in 1 gram of the rubber-reinforced copolymer resin (A1), and y is an insoluble content when 1 gram of the rubber-reinforced copolymer resin (A1) is dissolved in acetone. It is a value obtained by the following formula when it is expressed in grams.
Graft rate (%) = {(y−x) / x} × 100

Moreover, the intrinsic viscosity [η] (measured in methyl ethyl ketone at 30 ° C.) of the soluble component of acetone of the rubber-reinforced copolymer resin (A1) is preferably 0.1 to 0.8 dl / g, more preferably 0. 0.1 to 0.6 dl / g, more preferably 0.1 to 0.5 dl / g. By setting it as this range, it is excellent in molding processability, and the impact resistance of the composition of this invention and a molded object containing the same is also excellent.
The graft ratio and intrinsic viscosity [η] are the polymerization conditions for producing the rubber-reinforced copolymer resin (A1), that is, the types and amounts of polymerization initiator, chain transfer agent, emulsifier, solvent, etc. Furthermore, it can be easily controlled by changing the polymerization time, polymerization temperature and the like.

  The rubber-reinforced copolymer resin (A1) may be used alone, but is obtained by changing the type and amount of the rubbery polymer (a) and the type and amount of the monomer component (b). A combination of two or more of these can also be used.

  As described above, the component [A] may be only the rubber-reinforced copolymer resin (A1), or the rubber-reinforced copolymer resin (A1) and the monomer component (b). It may be a mixture with the copolymer (A2) obtained by polymerization.

As said monomer component (b) used for formation of a copolymer (A2), the said compound used for formation of the said rubber | gum reinforcement | strengthening copolymer resin (A1) is applicable.
Therefore, the copolymer (A2) is a polymer obtained by polymerizing the same type of monomer as the monomer component (b) used for forming the rubber-reinforced copolymer resin (A1) with the same composition. Alternatively, it may be a polymer obtained by polymerizing the same type of monomers with different compositions, or may be a polymer obtained by polymerizing different types of monomers. Two or more of these polymers may be contained.

Examples of the copolymer (A2) include the following (i) to (v).
(I) Polymethyl methacrylate (ii) Polystyrene (iii) Methyl methacrylate / aromatic vinyl compound copolymer In (iii), the preferred amount of each compound unit is 50 to 90 when the total amount is 100% by mass. It is 60 mass% and 50-10 mass%, More preferably, it is 60-90 mass% and 40-10 mass%, More preferably, it is 60-80 mass% and 40-20 mass%.
Specific examples of this copolymer include methyl methacrylate / styrene copolymer, methyl methacrylate / α-methylstyrene copolymer, and the like.
(Iv) Methyl methacrylate / aromatic vinyl compound / vinyl cyanide compound copolymer In (iv), the preferable amount of each compound unit is 60 to 95% by mass, 5 to 40 when the total amount is 100% by mass. % By mass and 0-10% by mass, more preferably 60-90% by mass, 10-40% by mass and 0-7% by mass, still more preferably 60-80% by mass, 20-40% by mass and 0-5% by mass. It is.
Specific examples of this copolymer include methyl methacrylate / styrene / acrylonitrile copolymer, methyl methacrylate / α-methylstyrene / acrylonitrile copolymer, and the like.
(V) Aromatic vinyl compound / vinyl cyanide compound copolymer In this (v), the preferable amount of each compound unit is 92 to 99% by mass and 8 to 1% by mass when the total amount is 100% by mass. . Specific examples include styrene / acrylonitrile copolymers.
Of these (i) to (v), (iii) and (iv) are preferable, and (iii) is more preferable.
These (i) to (v) can be used alone or in combination. Also, those having different physical properties such as weight average molecular weight and intrinsic viscosity can be used in combination.

  The intrinsic viscosity [η] (measured in methyl ethyl ketone at 30 ° C.) of the copolymer (A2) is preferably 0.1 to 0.8 dl / g, more preferably 0.1 to 0.6 dl / g, Preferably it is 0.1-0.45 dl / g. When the intrinsic viscosity [η] is within the above range, the physical property balance between molding processability and impact resistance is excellent.

The copolymer (A2) is polymerized by solution polymerization, bulk polymerization, emulsion polymerization, suspension polymerization or the like using a polymerization initiator or the like applied to the production of the rubber-reinforced copolymer resin (A1). Alternatively, it can be produced by thermal polymerization without using a polymerization initiator. These polymerization methods may be combined. In addition, as long as it does not inhibit reaction, the below-mentioned additive which can be mix | blended with the composition of this invention may be added to a reaction system.
The intrinsic viscosity [η] of the copolymer (A2) can be controlled by adjusting the polymerization conditions.

  In the case where the component [A] is a mixture of the rubber-reinforced copolymer resin (A1) and the copolymer (A2), the component [A] is usually an extruder, a Banbury mixer. It can be produced by kneading using a kneader, roll, feeder ruder or the like. The method of using each component is not particularly limited, and may be mixed and kneaded in an extruder or the like, or may be kneaded in multiple stages. The kneading temperature is usually 180 to 260 ° C, preferably 200 to 240 ° C.

1-2. Ingredient [B]
This component [B] is a polymer type antistatic agent, and conventionally known ones can be used. Specifically, polyamide elastomers (including polyether amides, polyether ester amides, polyether amide imides, etc.); polyether ester elastomers; polyester elastomers; polyalkylene oxides such as ethylene oxide / epichlorohydrin copolymers Polymer; Polyalkylbenzenesulfonate; Acrylic copolymer such as polyethylene glycol (meth) acrylate copolymer, methoxypolyethylene glycol (meth) acrylate copolymer; Quaternary ammonium base-containing (meth) acrylate copolymer , Quaternary ammonium base-containing maleimide copolymers, quaternary ammonium base-containing methacrylimide copolymers and other quaternary ammonium base copolymers; solids such as carbobetaine graft copolymers Emissions-based copolymer, waxes, ionomer resins. Furthermore, a block copolymer (“Pelestat 300, 303, 230 series (trade name)” manufactured by Sanyo Kasei Co., Ltd.) including an olefin polymer block and a polymer block having a hydrophilic group (such as a hydroxyl group) can also be used. These antistatic agents can be used alone or in combination of two or more. Of these, polyamide elastomers and polyether ester elastomers are preferred.

  Hereinafter, the polyamide elastomer and the polyether ester elastomer will be described.

1-2-1. Polyamide-based elastomer A typical example of the polyamide-based elastomer is a block copolymer containing a hard segment (x1) composed of a polyamide component and a soft segment (x2) composed of a poly (alkylene oxide) glycol component. .

  The polyamide component used for forming the hard segment (x1) is not particularly limited as long as it is a polymer having an acid amide bond (—CO—NH—) in the main chain. This polyamide component is usually produced by a known method such as ring-opening polymerization of a lactam compound having a ring structure, polymerization of aminocarboxylic acid, condensation polymerization of dicarboxylic acid and diamine compound. Accordingly, the polyamide component is used as a homopolyamide, a copolyamide or the like.

Examples of the lactam compound used in the ring-opening polymerization include ε-caprolactam and ω-laurolactam.
Examples of the aminocarboxylic acid include aminocaproic acid, aminoenanoic acid, aminocaprylic acid, aminobergonic acid, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 9-aminononanoic acid, and 12-aminododecanoic acid.

  The dicarboxylic acids used in the condensation polymerization of dicarboxylic acids and diamine compounds include adipic acid, suberic acid, sebacic acid, dodecanedicarboxylic acid, glutaric acid, cyclohexanedicarboxylic acid, terephthalic acid, 2-methylterephthalic acid, isophthalic acid, and naphthalene dicarboxylic acid. An acid etc. are mentioned. Examples of the diamine compound include ethylene diamine, tetramethylene diamine, hexamethylene diamine, nonamethylene diamine, decamethylene diamine, undecamethylene diamine, dodecamethylene diamine, 2,3,4-trimethylhexamethylene diamine, 2,4,4. -Trimethylhexamethylenediamine, bis (p-aminocyclohexyl) methane, m-xylylenediamine, p-xylylenediamine, paraphenylenediamine, metaphenylenediamine and the like.

  Examples of the polyamide component include nylon 4, 6, 7, 8, 11, 12, 6.6, 6.9, 6.10, 6.11, 6.12, 6T, 6 / 6.6, and 6/12. 6 / 6T, 6T / 6I, and the like can be used. In addition, the terminal of this polyamide component may be sealed with carboxylic acid, amine or the like. Examples of the carboxylic acid include aliphatic monocarboxylic acids such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid. Examples of the amine include aliphatic primary amines such as hexylamine, octylamine, decylamine, laurylamine, myristylamine, palmitylamine, stearylamine, and behenylamine.

  The number average molecular weight of the polyamide component is preferably 500 to 10,000, more preferably 500 to 5,000. In addition, when using 2 or more types of polyamide components, the measured value when mixed may be in the above range.

As the poly (alkylene oxide) glycol component used for forming the soft segment (x2), a known polymer such as a polymer represented by the following formula (I) is used singly or in combination of two or more. be able to.
HO (CH ₂ CH ₂ O) _m (CH ₂ CH (X) O) _n H (I)
[Wherein, X represents a hydrogen atom (—H) or a substituent —CH ₃ , —CH ₂ Cl, —CH ₂ Br, —CH ₂ I or —CH ₂ OCH ₃ , and n ≧ 0, m ≧ 0. And (n + m) ≧ 20. ]

Specific examples of the poly (alkylene oxide) glycol component include polyethylene glycol, poly (1,2-propylene oxide) glycol, poly (1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene). Oxide) glycol, polyethylene oxide, polypropylene oxide, block or random copolymer of ethylene oxide and propylene oxide, block or random copolymer of ethylene oxide and tetrahydrofuran, alkylene oxide adduct of bisphenol A, and the like. Of these, an alkylene oxide adduct of polyethylene glycol and bisphenol A is preferred.
Note that both ends of the poly (alkylene oxide) glycol component may be aminated and / or carboxylated.

  The number average molecular weight of the poly (alkylene oxide) glycol component is preferably 200 to 20,000, more preferably 300 to 10,000, and still more preferably 300 to 4,000. In the case of using two or more kinds of poly (alkylene oxide) glycol components, the measured value when mixed may be within the above range.

The polyamide-based elastomer can be obtained by polymerizing a polyamide component and a poly (alkylene oxide) glycol component under reduced pressure or normal pressure.
The respective proportions of the polyamide component and the poly (alkylene oxide) glycol component are preferably 10 to 95% by mass and 90 to 5% by mass, more preferably 20 to 90% by mass, when the total of these components is 100% by mass. % And 80 to 10% by mass, particularly preferably 30 to 70% by mass and 70 to 30% by mass. If the proportion of the polyamide component used is less than 10% by mass, the compatibility between the obtained polyamide elastomer and the thermoplastic resin may not be sufficient, while if it exceeds 95% by mass, the effect as an antistatic agent is not exhibited. There is a case.
In the polymerization, an antimony catalyst, a tin catalyst, a titanium catalyst, a zirconium catalyst, an acetate metal salt catalyst, or the like can be used.

In the polymerization of the polyamide component and the poly (alkylene oxide) glycol component, a dicarboxylic acid, a diamine compound or the like can be used in combination as a polymerization raw material.
Examples of the dicarboxylic acid include aromatic dicarboxylic acid, alicyclic dicarboxylic acid, and aliphatic dicarboxylic acid. Aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4-dicarboxylic acid, diphenoxyethanedicarboxylic acid, 3 -Sodium sulfoisophthalate and the like. Examples of the alicyclic dicarboxylic acid include 1,4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, dicyclohexyl-4,4-dicarboxylic acid, and the like. Examples of the aliphatic dicarboxylic acid include succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanedicarboxylic acid and the like. Of these, terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, sebacic acid, adipic acid and dodecanedicarboxylic acid are preferred. Moreover, these dicarboxylic acids can be used individually by 1 type or in combination of 2 or more types.

  As the diamine compound, aromatic diamine compounds, alicyclic diamine compounds and aliphatic diamine compounds are used. Examples of the aromatic diamine compound include p-phenylenediamine, m-phenylenediamine, diaminodiphenyl ether, diaminodiphenylmethane, and the like. Examples of the alicyclic diamine compound include piperazine, diaminodicyclohexylmethane, cyclohexyldiamine, and the like. Examples of the aliphatic diamine compound include hexamethylene diamine, ethylene diamine, propylene diamine, and octamethylene diamine. Of these, hexamethylenediamine is preferred. Moreover, these diamine compounds can be used individually by 1 type or in combination of 2 or more types.

  Bonding of hard segment (x1) and soft segment (x2) is achieved by polymerization of polyamide component and poly (alkylene oxide) glycol component, or polymerization of polyamide component, poly (alkylene oxide) glycol component and dicarboxylic acid, diamine compound, etc. Depending on the terminal structure of the soft segment (x2), it is usually an ester bond or an amide bond.

  As the polyamide-based elastomer, (1) a polyamide obtained by polymerization of an aminocarboxylic acid having 6 or more carbon atoms or polymerization of a lactam compound, or a diamine compound and dicarboxylate having 6 or more carbon atoms is used. Obtained by using the obtained polyamide, (2) polyethylene glycol having a number average molecular weight of 200 to 20,000, and (3) dicarboxylic acid having 4 to 20 carbon atoms, wherein the polyether ester unit is the whole polymer. Polyether ester amides with respect to 10 to 95% by weight are preferred.

The reduced viscosity η _{sp / c} (measured using a 0.5 g / 100 ml formic acid solution at 25 ° C.) of the polyamide-based elastomer is preferably 0.5 to 3.0 dl / g, more preferably 1.0 to 2.5 dl / g. The polyamide elastomer may have a reduced molecular weight due to thermal deterioration during the production of the composition of the present invention or during molding, but the reduced viscosity η _{sp / c} in the final product is preferably 0.00. 3 dl / g or more.

  The polyamide-based elastomer can be used alone as an antistatic agent, but is composed of a mixture containing an alkali metal salt such as lithium, sodium, or potassium; and a salt such as an alkaline earth metal salt such as magnesium or calcium. It can also be used as [B]. By containing these salts, the antistatic performance can be further improved. The salt may be blended before, during and after the production of the polyamide-based elastomer, and further during the production of the composition of the present invention.

Examples of the salts include halides, inorganic acid salts, and organic acid salts.
The halides are preferably alkali metal halides and alkaline earth metal halides.
The inorganic acid salt is preferably an alkali metal inorganic acid salt.

Examples of the alkali metal halide include lithium chloride, sodium chloride, potassium chloride, lithium bromide, sodium bromide, and potassium bromide.
Examples of the alkaline earth metal halide include magnesium chloride and calcium chloride.
Examples of alkali metal inorganic acid salts include perchlorates such as lithium perchlorate, sodium perchlorate, and potassium perchlorate.

Organic acid salts include carboxylates of alkali metals such as potassium acetate and lithium stearate; octyl sulfonic acid, dodecyl sulfonic acid, tetradecyl sulfonic acid, stearyl sulfonic acid, tetracosyl sulfonic acid, 2-ethylhexyl sulfonic acid, etc. An alkali metal salt of an alkyl sulfonic acid having an alkyl group having 8 to 24 carbon atoms; an alkali metal salt of an aromatic sulfonic acid such as phenyl sulfonic acid or naphthyl sulfonic acid; octyl phenyl sulfonic acid, dodecyl phenyl sulfonic acid, Alkali metal salts of alkylbenzene sulfonic acid having an alkyl group having 6 to 18 carbon atoms, such as dibutylphenyl sulfonic acid and dinonylphenyl sulfonic acid; dimethyl naphthyl sulfonic acid, diisopropyl naphthyl sulfonic acid, dibutyl naphthyl sulfonic acid, etc. Alkali metal salts of alkyl naphthalene sulfonic acids having an alkyl group having 2 to 18 carbon atoms; alkali metal salts of fluorinated sulfonic acids such as trifluoromethane sulfonic acid; alkali metal salts of tris (trifluoromethanesulfonyl) methane .
The said salts can be used individually by 1 type or in combination of 2 or more types.
The amount of the salt is preferably 0.001 to 10 parts by mass, more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the polyamide-based elastomer.

1-2-2. Polyether Ester Elastomer A typical example of this polyether ester elastomer is a block copolymer containing a hard segment (y1) composed of a polyester component and a soft segment (y2) composed of a poly (alkylene oxide) glycol component. Such as coalescence.

  As a polyester component used for formation of a hard segment (y1), any of aliphatic polyester, alicyclic polyester, and aromatic polyester may be sufficient. This polyester component is usually produced by a reaction between an acid component containing a dicarboxylic acid and / or an ester-forming derivative of a dicarboxylic acid and a diol component containing a diol compound and / or an ester-forming derivative of a diol compound. Accordingly, the polyester component is used as a homopolyester, a copolyester or the like.

Among the acid components, dicarboxylic acids include terephthalic acid, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4′-biphenyldicarboxylic acid, 4,4′-diphenylether dicarboxylic acid, 4,4 ′. -Aromatic dicarboxylic acids such as diphenylmethane dicarboxylic acid, 4,4′-diphenylsulfone dicarboxylic acid, and 4,4′-diphenylisopropylidenedicarboxylic acid. These substitution products (alkyl group substitution products such as methyl isophthalic acid) and derivatives (alkyl ester compounds such as dimethyl terephthalate and dimethyl 2,6-naphthalenedicarboxylate) can also be used.
Furthermore, oxyacids and their ester-forming derivatives such as p-oxybenzoic acid and p-hydroxyethoxybenzoic acid can also be used.
The said acid component can be used individually by 1 type or in combination of 2 or more types.

Examples of the diol component include aliphatic glycols such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, and neopentyl glycol; and alicyclic glycols such as 1,4-cyclohexanedimethanol. In addition, these substitution bodies and derivatives can also be used. A cyclic ester compound such as ε-caprolactone can also be used.
Furthermore, long-chain diol compounds (polyethylene glycol, polytetramethylene glycol, etc.), alkylene oxide addition polymers of bisphenols, etc. (ethylene oxide addition polymers of bisphenol A, etc.), etc. can be used as necessary. .
The said diol component can be used individually by 1 type or in combination of 2 or more types.

  Examples of the polyester component include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polycyclohexane-1,4-dimethyl terephthalate, polyneopentyl terephthalate, polyethylene isophthalate, polyethylene naphthalate, polybutylene naphthalate, poly Hexamethylene naphthalate or the like can be used. Also, a copolyester can be used.

The average molecular weight of the polyester component is not particularly limited, but is preferably 0.3 to 2.5 dl / g, more preferably 0.5 to 2.5 dl / g, as a reduced viscosity η _{sp / c serving} as an index of the average molecular weight. g.

  As the poly (alkylene oxide) glycol component used for forming the soft segment (y2), the soft segment (x2) can be applied as it is.

  The polyether ester elastomer can be used alone as an antistatic agent, but includes an organic sulfonic acid compound, a phenol compound, a mixture containing salts that are components that can be used in combination with the polyamide elastomer, and the like. By doing so, further excellent antistatic properties can be imparted.

Examples of the organic sulfonic acid compounds include compounds formed from organic sulfonic acids and bases, and some of them are included in low molecular weight antistatic agents described later, but are not particularly limited.
Examples of the organic sulfonic acid compounds include alkyl sulfonates having 8 to 24 carbon atoms in the alkyl group, alkylbenzene sulfonates having 6 to 18 carbon atoms in the alkyl group, and alkyls having 2 to 18 carbon atoms in the alkyl group. Naphthalene sulfonate is preferred. Specific examples include tetradecyl sulfonate, dodecyl phenyl sulfonate, dimethyl naphthyl sulfonate, sodium tetradecyl sulfonate, sodium dodecyl phenyl sulfonate, sodium dimethyl naphthyl sulfonate, tetrabutyl dodecyl phenyl sulfonate. Examples thereof include phosphonium.
The said organic sulfonic acid type compound can be used individually by 1 type or in combination of 2 or more types.

Examples of the phenol-based compound is not particularly limited, and phenol skeleton (-C 6 H _{5 OH)} may be a compound comprising only one may be a compound containing two or more.
Examples of the phenol compound include 3,9-bis [2- (3- (3-tert-butyl-4-hydroxy-5-methylphenyl) -propionyloxy) -1,1-dimethylethyl] -2,4. , 8,10-tetraoxaspiro (5,5) undecane (molecular weight 741), 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) Examples include benzene (molecular weight 775), tris- (3,5-di-tert-butyl-4-hydroxybenzyl) -isocyanurate (molecular weight 784), and the like. Of these, compounds having a molecular weight in the range of 700 to 1,200 are more preferred.
Although some of the above compounds are used as antioxidants, these antioxidants can be used as they are.
The said phenolic compound can be used individually by 1 type or in combination of 2 or more types.

  The polyether ester elastomer can impart excellent antistatic properties by combining an organic sulfonic acid compound and a phenol compound. The preferred configuration is as follows. That is, when the total of these three components is 100% by mass, the organic sulfonic acid compound is 4 to 30% by mass, preferably 10 to 30% by mass, and the phenolic compound is 0.1 to 3.5% by mass. The content is preferably 0.2 to 2% by mass, and the remainder is a polyether ester elastomer.

Moreover, when using the said salts, it can be set as the usage method similar to the case of a polyamide-type elastomer.
In addition, when using said polyamide-type elastomer and polyether ester-type elastomer together, the compounding quantity of salts is preferably 0.001-10 with respect to a total of 100 mass parts of polyamide-type elastomer and polyether ester-type elastomer. Part by mass, more preferably 0.01 to 5 parts by mass.

1-3. Antistatic resin composition In the composition of the present invention, the content ratios of the above components [A] and [B] are 70 to 95% by mass and 30 to 30%, respectively, when the total amount thereof is 100% by mass. 5% by mass, preferably 75 to 95% by mass and 25 to 5% by mass, more preferably 75 to 90% by mass and 25 to 10% by mass, still more preferably 75 to 85% by mass and 25 to 15% by mass. is there. If the content of the component [A] is too small (the content of the component [B] is too large), the rigidity is lowered and may be unsuitable for films, sheets, containers and the like. On the other hand, when the content of the component [A] is too large (the content of the component [B] is too small), the antistatic property becomes insufficient.

  Depending on the purpose and application, the composition of the present invention may further comprise a low molecular weight antistatic agent, an ultraviolet absorber, a weathering agent, a filler, an antioxidant, an anti-aging agent, a flame retardant, an antifogging agent, a lubricant, Additives such as antibacterial agents, tackifiers, plasticizers and colorants; may contain other polymers.

Examples of the low molecular weight antistatic agent include anionic antistatic agents such as sodium alkyl sulfonate, sodium alkyl benzene sulfonate, and alkyl phosphate; phosphonium alkyl sulfonate, phosphonium alkyl benzene sulfonate, tetraalkyl ammonium salt, trialkyl benzyl ammonium salt, Cationic antistatic agents such as quaternary ammonium salts; Nonionic antistatic agents such as polyhydric alcohol derivatives and alkylethanolamines; Amphoteric antistatic agents such as alkylbetaines and sulfobetaine derivatives; Complex compounds; Metal alkoxides and Derivatives thereof (alkoxysilane, alkoxytitanium, alkoxyzirconium and the like); organoboron compounds; coated silica and the like. These can be used alone or in combination of two or more.
The content of the low molecular weight antistatic agent is usually 0.1 to 1 part by mass with respect to 100 parts by mass of the component [A].

Examples of the ultraviolet absorber include benzophenones, benzotriazoles, salicylic acid esters, metal complex salts and the like. These can be used alone or in combination of two or more.
Content of the said ultraviolet absorber is 0.05-5 mass parts normally with respect to 100 mass parts of said component [A].

Examples of the weathering agent include organic phosphorus compounds, organic sulfur compounds, and organic compounds containing a hydroxyl group. These can be used alone or in combination of two or more.
Content of the said weathering agent is 0.1-5 mass parts normally with respect to 100 mass parts of said component [A].

As fillers, heavy calcium carbonate, light calcium carbonate, ultrafine activated calcium carbonate, special calcium carbonate, basic magnesium carbonate, kaolin clay, calcined clay, pyrophyllite clay, silane-treated clay, synthetic calcium silicate , Synthetic magnesium silicate, synthetic aluminum silicate, magnesium carbonate, magnesium hydroxide, kaolin, sericite, talc, fine powder talc, wollastonite, zeolite, zonotlite, asbestos, PMF (Processed Mineral Fiber), cucumber powder, sepiolite, titanic acid Potassium, elastadite, gypsum fiber, glass balun, silica balun, hydrotalcite, fly ash balun, shirasu balun, carbon balun, barium sulfate, aluminum sulfate, calcium sulfate Arm, molybdenum disulfide, and the like. These can be used alone or in combination of two or more.
Content of the said filler is 0.05-20 mass parts normally with respect to 100 mass parts of said component [A].

Examples of the antioxidant include hindered amines, hydroquinones, hindered phenols, and sulfur-containing compounds. These can be used alone or in combination of two or more.
Content of the said antioxidant is 0.1-0.5 mass part normally with respect to 100 mass parts of said component [A].

Anti-aging agents include naphthylamine, diphenylamine, p-phenylenediamine, quinoline, hydroquinone derivatives, monophenol, bisphenol, trisphenol, polyphenol, thiobisphenol, hindered phenol, phosphorous acid Examples include ester compounds. These can be used alone or in combination of two or more.
Content of the said anti-aging agent is 0.1-0.5 mass part normally with respect to 100 mass parts of said component [A].

  Other polymers include polycarbonate, polypropylene, polyethylene and the like.

The composition of the present invention has the following properties.
[1] The content of the rubbery polymer (a) in the composition of the present invention is 5 to 40% by mass, preferably 5 to 35% by mass, more preferably 5 to 30% by mass, and still more preferably. It is 10-30 mass%. If the content of the rubbery polymer (a) is too small, the impact resistance of the composition of the present invention and the molded article containing the composition tends to be insufficient, and if too much, the moldability and the surface appearance of the molded article Tend to have insufficient properties, rigidity, heat resistance and the like.
[2] Detection during a retention time of 10 to 24 minutes when pyrolysis gas chromatography measurement (hereinafter also referred to as “PyGC measurement”) is performed under conditions of a pyrolysis temperature of 423 ° C. and a pyrolysis time of 30 seconds. The total amount of the substance (hereinafter also referred to as “specific detection object”) is 20,000 μg or less, preferably 19,000 μg or less, more preferably 18,000 μg or less, more preferably 1 g of the composition of the present invention. It is 15,000 μg or less, particularly preferably 10,000 μg or less. All of these numerical values are octadecane equivalent amounts. When the total amount of the specific detection object exceeds 20,000 μg, an odor may be emitted when molding using the composition of the present invention, or an odor may be emitted from the obtained molded article. In the case of manufacturing equipment or the like, there may be adverse effects such as contamination or defects of the electronic equipment.
In addition, although the said specific detection thing is not clear, it is estimated that it is a nitrogen-containing compound derived from the vinyl cyanide compound at the time of using a vinyl cyanide compound (b2) for formation of component [A].

The detailed conditions of this PyGC measurement are as follows, and the analyzer is not particularly limited.
Thermal decomposition temperature: 423 ° C (oven temperature 280 ° C, needle temperature 260 ° C)
Thermal decomposition time: 30 seconds Column: “BPX-5” manufactured by GL Sciences (fused silica capillary column, film thickness 0.25 μm, inner diameter 0.25 mm, length 30 m)
Column temperature: 50 ° C. → 350 ° C. (temperature increase rate: 10 ° C./min), held at 350 ° C. for 5 minutes GC inlet temperature: 350 ° C.
Detector FID
Detector temperature: 350 ° C
Carrier gas; helium (flow rate 1 ml / min, split ratio 1/50)

Moreover, it is preferable that the composition of this invention is further equipped with the following property.
[3] Units consisting of monomer (b1), vinyl cyanide compound (b2), and monomer (b3) used for forming component [A] are unit (b1 ′) and unit (b2 ′), respectively. ) And unit (b3 ′), each content is preferably 60 to 100% by mass, 0 to 10% by mass and 0 to 30% by mass [however, (b1 ′) + (b2 ′) + ( b3 ′) = 100% by mass. More preferably 65 to 100% by mass, 0 to 10% by mass and 0 to 25% by mass, still more preferably 75 to 100% by mass, 0 to 5% by mass and 5 to 20% by mass, particularly preferably 100. Mass%, 0 mass%, and 0 mass%. When there is too much content of the said unit (b2 '), it exists in the tendency for the total amount of a specific detection thing to increase.
The unit (b1 ′) has a horn content of methyl methacrylate units and aromatic vinyl compound units, preferably 10 to 90% by mass and 90 to 10% by mass, assuming that the total of these units is 100% by mass. %, More preferably, it is 10-80 mass% and 90-20 mass%, More preferably, it is 20-80 mass% and 80-20 mass%.
The contents of the above units (b1 ′), (b2 ′) and (b3 ′) are the polymer components extracted from the composition of the present invention with acetone, that is, the rubbery polymer (a), the component [B ], A component not containing a polymer component such as another polymer (hereinafter also referred to as “acetone-soluble component”) can be obtained by PyGC.

The detailed conditions of this PyGC measurement are as follows, and the analyzer is not particularly limited.
Thermal decomposition temperature: 590 ° C (oven temperature 280 ° C, needle temperature 260 ° C)
Thermal decomposition time: 5 seconds Column: “BPX-5” manufactured by GL Sciences (fused silica capillary column, film thickness 0.25 μm, inner diameter 0.25 mm, length 30 m)
Column temperature: 50 ° C. → 350 ° C. (temperature increase rate: 10 ° C./min), held at 350 ° C. for 5 minutes GC inlet temperature: 350 ° C.
Detector FID
Detector temperature: 350 ° C
Carrier gas; helium (flow rate 1 ml / min, split ratio 1/50)

[4] The intrinsic viscosity [η] (measured in methyl ethyl ketone at 30 ° C.) of the acetone-soluble component of the composition of the present invention is preferably 0.1 to 0.6 dl / g, more preferably 0.1 to 0. .4 dl / g, more preferably 0.1 to 0.35 dl / g. When the intrinsic viscosity [η] is within the above range, the physical property balance between molding processability and impact resistance is excellent.
Of [5] The composition of the present invention, Charpy impact strength measured according to ISO 179 is preferably 8 kJ / ^{m 2} or more, more preferably 10 kJ / ^{m 2} or more, more preferably at 12 kJ / ^{m 2} or more is there.
[6] The surface specific resistance of the composition of the present invention at a temperature of 23 ° C. and a humidity of 50% RH is preferably 10 ¹¹ Ω or less, more preferably 10 ¹⁰ Ω or less, and even more preferably 10 ⁹ Ω or less. be able to.

  The composition of the present invention is a molding material that forms an electronic device container (including a holding member and a support member); Etc. are suitable.

2. Molded body The composition of the present invention is known for injection molding, extrusion molding (sheet extrusion, T-die extrusion, profile extrusion), calendar molding, inflation molding, hollow molding, compression molding, vacuum molding, foam molding, blow molding and the like. By this molding method, a molded body having a predetermined shape can be obtained. Each shaping | molding processing method may be combined and a extending | stretching process may be performed.

  The molded body of the present invention can be shaped according to the purpose, application and the like. For example, containers such as trays and cases; thin bodies such as sheets, films and plates (see FIG. 1); rod-like bodies such as round bars and square bars; it can. An arbitrary part of each molded body may have a thin-walled part, a concavo-convex part, a groove part, a hole part, and the like according to the purpose and application. Moreover, you may have a through-hole.

  The molded body of the present invention is suitable for electronic equipment containers (including holding members and support members), trays; walls, curtains, coverings (including protective members), transport equipment and other electronic equipment manufacturing equipment. is there.

  The molded article of the present invention is also suitable for forming a composite article integrated with a molded article made of another material, for example, a laminate described later. Therefore, in the composite article, when the molded part using the composition of the present invention is on the outermost surface, contamination of the contacted object, its surroundings, and the like is suppressed.

3. Laminated body The laminated body of this invention is characterized by laminating | stacking the molded object containing the composition of the said invention on the at least one surface of the support body containing a thermoplastic polymer. That is, the laminate of the present invention comprises a support containing a thermoplastic polymer, and a molded product (hereinafter referred to as “molded part”) disposed on at least one surface of the support and containing the composition of the present invention. "). The number of molding parts on the support may be only one, or two or more.

The support may be composed of only a thermoplastic polymer, or may be composed of a composition containing the thermoplastic polymer and other components (such as the above additives).
The thermoplastic polymer includes polyolefin resin, rubber reinforced resin, polyester resin, acrylic resin, polyamide resin, polycarbonate resin, various thermoplastic elastomers, liquid crystal polymer, polyurethane resin, polyacetal resin, polyphenylene ether type. Examples thereof include resins, fluorine resins, styrene resins, polyvinyl chloride resins, polyvinylidene chloride resins, and polyvinyl acetate resins. These can be used alone or in combination of two or more. These resins may be recycled products.
Of these, rubber reinforced resins, polyamide resins and styrene resins are preferred.

In the case of a rubber reinforced resin, it may be component [A] contained in the composition of the present invention, or other rubber reinforced resin.
In the case of a polyamide-based resin, the resin is not particularly limited as long as it has an acid amide bond (—CO—NH—) in the main chain, and nylon 4, 6, 7, 8, 11, 12, 6.6, 6.9 , 6.10, 6.11, 6.12, 6T, 6 / 6.6, 6/12, 6 / 6T, 6T / 6I, and the like can be used. The terminal of the polyamide resin may be sealed with a carboxylic acid (such as an aliphatic monocarboxylic acid) or an amine (such as an aliphatic primary amine).
The said polyamide-type resin can be used individually by 1 type or in combination of 2 or more types.

  Examples of styrene resins include polystyrene, styrene / (meth) acrylic acid ester copolymers, styrene / vinyl cyanide compound copolymers, styrene / (meth) acrylic acid ester / vinyl cyanide compound copolymers, and the like. Can be mentioned. These can be used alone or in combination of two or more.

The shape of the support may be plate-like, linear, massive, etc., or part or the whole may be bent, or may have a recess, a protrusion, a hole, a through-hole, etc. For example, the shape of a container such as a tray or a case may be used.
A preferable shape is a flat shape such as a sheet and a film, and a preferable average thickness in this case is 0.05 to 3 mm, more preferably 0.05 to 2 mm, and still more preferably 0.05 to 1 mm.

On the other hand, the molded part is disposed on at least one surface of the support. The shape may be the same as the shape of the support, or may be a completely different shape. Moreover, you may have a recessed part, a convex part, a hole part, a through-hole.
A preferable shape is a flat shape such as a sheet and a film, and a preferable average thickness in this case is 0.05 to 3 mm, more preferably 0.05 to 2 mm, and still more preferably 0.05 to 1 mm.
Therefore, when the laminated body of the present invention has, for example, a flat plate shape or the like, it is an aspect 2 (see FIG. 2) including the support body 21 and the molding portion 22 disposed only on one surface of the support body 21. Alternatively, it may be an aspect 2 ′ (see FIG. 3) including the support 21 and the molding portions 22a and 22b disposed on both surfaces of the support 21.

Although the said molded part contains the composition of the said invention, it may consist only of this composition and may further contain another substance.
In addition, when it is set as the laminated body which has a some shaping | molding part like the aspect of FIG. 3, the constituent material of each shaping | molding part may be the same or different. Moreover, the thickness of each molding part may be the same or different. When the constituent material of each molding part is the same, it can be set as the laminated body which has the antistatic property excellent in both surfaces. In addition, when the constituent materials of the molding parts are different, a laminate having excellent antistatic properties on one surface containing the composition of the present invention and different antistatic properties on the other surface is obtained. be able to.

  As described above, the laminate of the present invention can also be configured to include the thin portion 23 having a partially thin thickness by stretching or the like (see FIG. 4). FIG. 4 is a partial cross-sectional view in an aspect 2 ″ in which the thickness of the support 21 and the molded portions 22a and 22b in the thin portion 23 is smaller than that of portions other than the thin portion.

  The method for producing the laminate of the present invention is not particularly limited, and (ii) a method in which a support and a molded body that constitutes a molded part are separately prepared and integrated, and (ii) a support. There is a method of forming a composite in one step using a forming material (including a thermoplastic polymer) and a molding part forming material (including the composition of the present invention).

  As said aspect (i), the support body and the molded object which comprises a shaping | molding part are prepared separately, the method of thermocompression bonding, the method of joining with an adhesive agent or an adhesive, etc. are mentioned. . The above-mentioned support and molded body are each formed into a predetermined shape by a known molding method, and if necessary, corona discharge treatment, flame treatment, oxidation treatment, plasma treatment, UV treatment, ion treatment are performed on the surfaces to be joined. You may modify | reform by bombardment processing, solvent processing, anchor coat processing, etc. In the case where the support and the molded body are thin bodies, a flat film or a flat sheet is obtained by injection molding, calender molding, inflation molding, sheet extrusion, T-die extrusion, etc. Thus, a laminated film or a laminated sheet can be obtained.

  As said aspect (ii), a laminated body can be obtained by coextrusion, multilayer inflation molding, etc. using a support body forming material and a molding part forming material.

  Further, in order to obtain a laminate 2 ″ having a thin portion 23 as shown in FIG. 4, after the laminate 2 ′ shown in FIG. 3 is manufactured, a desired stretching is performed by a method such as calendaring, inflation molding, vacuum molding, or the like. A thin portion 23 having a magnification can be formed.

  The laminate of the present invention is suitable for electronic equipment containers such as containers (including holding members and support members), trays; walls, curtains, coverings (including protective members), and transport containers. In addition, in the said use, when to-be-contacted objects, such as an electronic component and an electronic device, are loaded and hold | maintained, it is preferable on the surface of the molded object (molding | molding part) containing the composition of this invention.

  The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded. In the following, parts and% are: Unless otherwise noted, it is based on mass.

1. Evaluation method The measurement method of each evaluation item in the following Examples and Comparative Examples is shown below.
(1) Total amount of detected substance by PyGC measurement A high-frequency induction heating type thermal decomposition device (model “JPS-350”, manufactured by Nippon Analytical Industries, Ltd.) is attached to the gas chromatograph device (model “GC-14A”, manufactured by Shimadzu Corporation). Using the pyrolysis gas chromatograph apparatus, about 0.25 g of a sample (prepared from pellets) was wrapped in pyrofoil and subjected to measurement under the following conditions. From the obtained chromatograph, the detection substance at a retention time of 10 to 24 minutes was identified, and the total amount (detection substance total amount) in terms of octadecane was determined.
<Measurement conditions>
Thermal decomposition temperature: 423 ° C (oven temperature 280 ° C, needle temperature 260 ° C)
Thermal decomposition time: 30 seconds Column: “BPX-5” manufactured by GL Sciences (fused silica capillary column, film thickness 0.25 μm, inner diameter 0.25 mm, length 30 m)
Column temperature: 50 ° C. → 350 ° C. (temperature increase rate: 10 ° C./min), held at 350 ° C. for 5 minutes GC inlet temperature: 350 ° C.
Detector FID
Detector temperature: 350 ° C
Carrier gas; helium (flow rate 1 ml / min, split ratio 1/50)
(2) Charpy impact strength Measured according to ISO 179.
(3) Haze value A plate-shaped test piece (thickness 2.4 mm) produced using the antistatic resin composition was allowed to stand at a temperature of 23 ° C. and a relative humidity of 50% for 2 days. The haze value was measured under the conditions. The measuring device is a hedometer (trade name “haze-gard plus”) manufactured by Gardner.
(4) Odor The antistatic resin composition in a pellet state was put in a sample bottle and held at a temperature of 80 ° C. for 1 hour, then an odor was determined and evaluated according to the following criteria.
○: Not at all.
X: There was a strange odor.
(5) Antistatic property After leaving the test piece to stand for 48 hours under the conditions of a temperature of 23 ° C. and a humidity of 50% RH, the surface resistivity (Ω) was measured with a resistivity meter (trade name “HIRESTA-UP MCP-HT450”). , Manufactured by Mitsubishi Chemical Corporation) at an applied voltage of 500V.
(6) Amount of structural unit in acetone-soluble component of antistatic resin composition Using the same analyzer as in (1) above, methyl methacrylate unit, aromatic vinyl compound unit (styrene unit) and vinyl cyanide compound unit Each amount of (acrylonitrile unit) was quantified under the following conditions.
<Measurement conditions>
Thermal decomposition temperature: 590 ° C (oven temperature 280 ° C, needle temperature 260 ° C)
Thermal decomposition time: 5 seconds Column: “BPX-5” manufactured by GL Sciences (fused silica capillary column, film thickness 0.25 μm, inner diameter 0.25 mm, length 30 m)
Column temperature: 50 ° C. → 350 ° C. (temperature increase rate: 10 ° C./min), held at 350 ° C. for 5 minutes GC inlet temperature: 350 ° C.
Detector FID
Detector temperature: 350 ° C
Carrier gas; helium (flow rate 1 ml / min, split ratio 1/50)

2. 2. Production of antistatic resin composition and evaluation thereof 2-1. Rubber reinforced resin [A]
Production Example 1 (Production of rubber-reinforced copolymer resin [A1-1])
In a glass flask equipped with a stirrer and having an internal volume of 7 liters, 100 parts of ion exchange water, 2 parts of potassium rosinate, 0.5 parts of tert-dodecyl mercaptan, 30 parts of polybutadiene rubber latex having a volume average particle size of 300 nm (in terms of solid content) ), 4 parts of styrene, 1 part of acrylonitrile and 12 parts of methyl methacrylate were added and the temperature was raised while stirring. When the temperature reaches 50 ° C., it consists of 0.2 parts of ethylenediaminetetraacetate, 0.05 parts of ferrous sulfate, 0.2 parts of sodium formaldehyde sulfoxylate dihydrate and 10 parts of ion-exchanged water. An aqueous activator solution and 0.2 part of cumene hydroperoxide were added and reacted for 1 hour. Thereafter, the reaction was continued while continuously adding 12 parts of styrene, 4 parts of acrylonitrile, 37 parts of methyl methacrylate and 0.2 part of cumene hydroperoxide over 4 hours. The polymerization conversion rate of the monomer after the reaction was 96%. Thereafter, the reaction product latex was heated to 90 ° C. and coagulated with a 36% calcium chloride aqueous solution, and the resulting slurry was heated to 95 ° C. and held for 5 minutes. This was then washed with water and then dehydrated. Subsequently, it dried at 75 degreeC for 24 hours, and obtained powdery rubber-reinforced copolymer resin [A1-1]. About this rubber reinforcement | strengthening copolymer resin [A1-1], the composition of acetone soluble part was styrene / acrylonitrile / methyl methacrylate = 24.3% / 7.7% / 68.0%.

Production Example 2 (Production of rubber-reinforced copolymer resin [A1-2])
In a 7-liter glass flask equipped with a stirrer, 100 parts of ion exchange water, 1 part of potassium rosinate, 0.5 part of tert-dodecyl mercaptan, 18 parts of polybutadiene rubber latex having a volume average particle diameter of 310 nm (solid content) Conversion), 5 parts of styrene and 15 parts of methyl methacrylate were added, and the temperature was raised while stirring. When the temperature reaches 50 ° C., it comprises 0.2 parts of ethylenediaminetetraacetate, 0.01 parts of ferrous sulfate, 0.2 parts of sodium formaldehyde sulfoxylate dihydrate and 10 parts of ion-exchanged water. An aqueous activator solution and 0.2 part of cumene hydroperoxide were added and reacted for 1 hour. Thereafter, the reaction was continued while continuously adding 15 parts of styrene, 47 parts of methyl methacrylate and 0.2 part of cumene hydroperoxide over 4 hours. The polymerization conversion rate of the monomer after the reaction was 96%. Thereafter, the reaction product latex was heated to 90 ° C. and coagulated with a 36% calcium chloride aqueous solution, and the resulting slurry was heated to 95 ° C. and held for 5 minutes. This was then washed with water and then dehydrated. Subsequently, it dried at 75 degreeC for 24 hours, and obtained the powdery rubber-reinforced copolymer resin [A1-2]. About this rubber reinforcement | strengthening copolymer resin [A1-2], the composition of acetone soluble part was styrene / methyl methacrylate = 26.9% / 73.1%.

Production Example 3 (Production of rubber-reinforced copolymer resin [A1-3])
In a glass flask having an internal volume of 7 liters equipped with a stirrer, 100 parts of ion-exchanged water, 2 parts of potassium rosinate, 0.5 part of tert-dodecyl mercaptan, 18 parts of polybutadiene rubber latex having a volume average particle diameter of 280 nm (in terms of solid content) ), 4 parts of styrene, 2 parts of acrylonitrile and 15 parts of methyl methacrylate were added, and the temperature was raised while stirring. When the temperature reaches 50 ° C., it consists of 0.2 parts of ethylenediaminetetraacetate, 0.05 parts of ferrous sulfate, 0.2 parts of sodium formaldehyde sulfoxylate dihydrate and 10 parts of ion-exchanged water. An aqueous activator solution and 0.2 part of diisopropylbenzene hydroperoxide were added and reacted for 1 hour. Thereafter, the reaction was continued while continuously adding 8 parts of styrene, 8 parts of acrylonitrile, 45 parts of methyl methacrylate and 0.2 part of diisopropylbenzene hydroperoxide over 4 hours. The polymerization conversion rate of the monomer after the reaction was 96%. Thereafter, the reaction product latex was heated to 90 ° C. and coagulated with a 36% calcium chloride aqueous solution, and the resulting slurry was heated to 95 ° C. and held for 5 minutes. This was then washed with water and then dehydrated. Subsequently, it dried at 75 degreeC for 24 hours, and obtained powdery rubber-reinforced copolymer resin [A1-3]. About this rubber reinforcement | strengthening copolymer resin [A1-3], the composition of acetone soluble part was styrene / acrylonitrile / methyl methacrylate = 14.0% / 11.1% / 74.9%.

Production Example 4 (Production of rubber-reinforced copolymer resin [A1-4])
A rubber-reinforced copolymer resin [A1-4] was produced in the same manner as in Production Example 2 except that polybutadiene rubber latex having a volume average particle diameter of 450 nm was used. About this rubber reinforcement | strengthening copolymer resin [A1-4], the composition of acetone soluble part was styrene / methyl methacrylate = 27.1% / 72.9%.

Production Example 5 (Production of rubber-reinforced copolymer resin [A1-5])
A rubber-reinforced copolymer resin [A1-5] was produced in the same manner as in Production Example 2 except that polybutadiene rubber latex having a volume average particle diameter of 80 nm was used. About this rubber reinforcement | strengthening copolymer resin [A1-5], the composition of acetone soluble part was styrene / methyl methacrylate = 26.7% / 73.33%.

Production Example 6 (Production of copolymer [A2-1])
Two jacketed polymerization reactors having a ribbon wing with an internal volume of 30 liters were connected and purged with nitrogen. Then, 21 parts of styrene, 7 parts of acrylonitrile, 72 parts of methyl methacrylate, and 20 parts of toluene were added to the first polymerization reactor. Were continuously charged. Next, a solution obtained by dissolving 0.1 part of tert-dodecyl mercaptan as a molecular weight regulator in 5 parts of toluene, and 0.1 part of 1,1′-azobis (cyclohexane-1-carbonitrile) as a polymerization initiator in toluene 5 The solution dissolved in the part was continuously supplied. The temperature of the first polymerization reactor was controlled at 110 ° C., and the average residence time was 2 hours for polymerization. The polymerization conversion rate was 60%. Thereafter, from the obtained polymer solution, the same amount as the total supply amount of styrene, acrylonitrile, methyl methacrylate, toluene, molecular weight regulator and polymerization initiator is obtained by a pump provided outside the first polymerization reactor. It was continuously removed and supplied to the second polymerization reactor. The polymerization was carried out at a polymerization temperature of 130 ° C. and an average residence time of 2 hours in the second polymerization reactor. The polymerization conversion was 80%. Subsequently, the polymer solution is taken out from the second polymerization reactor, and this polymer solution is directly supplied to an extruder with a biaxial three-stage vent to remove unreacted monomers and solvent, and a copolymer [A2 -1] was obtained. The composition of the copolymer [A2-1] was styrene / acrylonitrile / methyl methacrylate = 28% / 5% / 67%. In addition, the intrinsic viscosity [η] of the acetone-soluble component of the copolymer [A2-1] was 0.25 dl / g.

2-2. Polymer antistatic agent [B]
As [B-1], nylon 6-based polyamide elastomer (trade name “Pelestat NC4321”, manufactured by Sanyo Chemical Industries, Ltd.) was used. The reduced viscosity η _{sp / c} (25 ° C., 0.5 g / 100 ml formic acid solution) is 1.1 dl / g.
As [B-2], a nylon 12 polyamide elastomer (prototype) was used. The reduced viscosity η _{sp / c} (25 ° C., 0.5 g / 100 ml formic acid solution) is 1.5 dl / g.

2-3. Production and Evaluation of Antistatic Resin Composition Example 1
45 parts of rubber-reinforced copolymer resin [A1-1], 35 parts of copolymer [A2-1], and 20 parts of polymer antistatic agent [B-1] were mixed using a Henschel mixer. Thereafter, this mixture was introduced into a twin-screw extruder and melt-kneaded at a temperature of 200 to 240 ° C. under the pelletizing conditions shown in Table 1 to obtain pellets (antistatic resin composition S1). The antistatic resin composition S1 was evaluated for the total amount of the detected substance, Charpy impact strength, haze value, odor, and surface resistivity by the above PyGC measurement. The results are shown in Table 1.

Examples 2-6 and Comparative Examples 1-5
Antistatic resin compositions S2 to S11 were obtained in the same manner as in Example 1 using predetermined amounts of the components shown in Table 1. Thereafter, the same evaluation was performed, and the results are also shown in Table 1.

尚、表１において、シングルベントは、押出機付属のベント数１ヶ所を意味し、ダブルベントは、押出機付属のベント数２ヶ所を意味し、真空度は、下記の通りである。
高：−９０ｋＰａ、
中：−８５ｋＰａ。

In Table 1, single vent means one vent attached to the extruder, double vent means two vent attached to the extruder, and the degree of vacuum is as follows.
High: -90 kPa,
Medium: -85 kPa.

3. Production and evaluation of laminates Examples 7-8
Front and back layers (molded portions) made of the antistatic resin composition S2 are formed on the front and back surfaces of the support (thickness 0.54 mm) made of the antistatic resin compositions S7 to S8 obtained above. A three-layer laminate as shown in FIG. The cross-section of this three-layer laminate was scraped, and the total amount of the detected substance, the surface specific resistance, and the molded appearance were evaluated by the above PyGC measurement. The results are shown in Table 2.

4). About each evaluation From Table 1 and Table 2, the following is clear.
In the evaluation of the antistatic resin composition, each of Examples 1 to 6 was excellent in impact resistance and antistatic property because no odor was generated during the test piece preparation. In addition, since the total amount of the detected substance in the retention time of 10 to 24 minutes by PyGC measurement is small, it is easy to produce a molded body that can suppress contamination of the contacted object and its peripheral equipment. On the other hand, Comparative Examples 1 and 2 are examples that do not contain the component [B] and are inferior in antistatic properties. Comparative Example 3 does not contain component [B], and is an example in which the total amount of the detected substance at a retention time of 10 to 24 minutes is too much according to PyGC measurement, and is outside the scope of the present invention. It seems to lead to contamination of the surrounding facilities. Furthermore, Comparative Examples 4 and 5 are also examples in which the total amount of the detected substance at a retention time of 10 to 24 minutes is too large according to PyGC measurement, which is thought to lead to contamination of the contacted object and its peripheral equipment.

  Further, in the evaluation of the three-layer laminate shown in Table 2, Examples 7 and 8 are made using the antistatic resin composition of the present invention, and both have good adhesion of each layer. Yes, it was excellent in antistatic properties and molded appearance.

  The antistatic resin composition of the present invention is excellent in impact resistance and antistatic properties, and also has excellent surface appearance when formed into a molded body such as a film. It is suitable as equipment. It is also suitable for various members and parts in the OA / home appliance field, vehicle field, sanitary field, building material field and the like.

It is sectional drawing which shows an example of the molded object (thin body) of this invention. It is sectional drawing which shows one example of the laminated body of this invention. It is sectional drawing which shows the other example of the laminated body of this invention. It is a fragmentary sectional view of the layered product which has a convex thin part.

Explanation of symbols

1: Molded body (thin body)
2, 2 'and 2 "; laminate 21; supports 22, 22a and 22b; molded part 23;

Claims (5)

The following component [A] 70-95 mass% and component [B] 5-30 mass% [however, [A] + [B] = 100 mass%. A composition containing a rubbery polymer (a) having a content of 5 to 40% by mass, a thermal decomposition temperature of 423 ° C., and a thermal decomposition time of 30 seconds. An antistatic resin composition characterized in that, when the measurement is performed, the total amount of the detection substance during a retention time of 10 to 24 minutes is 20,000 μg or less with respect to 1 g of the present composition.
Component [A]; monomer (b1) comprising methyl methacrylate and / or aromatic vinyl compound in the presence of 5 to 80 parts by mass of rubbery polymer (a), vinyl cyanide compound (B2) Monomer component (b) consisting of 0 to 10% by mass and another monomer copolymerizable with these compounds (b3) 0 to 30% by mass (provided that (b1) + (b2) + (B3) = 100% by mass. ] 20 to 95 parts by mass [wherein (a) + (b) = 100 parts by mass. ] Or a mixture comprising the rubber-reinforced copolymer resin (A1) and the (co) polymer (A2) of the monomer component (b). .
Component [B]; polymer type antistatic agent.   The monomer (b1) is 10 to 90% by mass of methyl methacrylate and 90 to 10% by mass of an aromatic vinyl compound [however, the total of these is 100% by mass. The antistatic resin composition according to claim 1.   The antistatic resin composition according to claim 1 or 2, which is a molding material for an electronic device container or an electronic device manufacturing facility.   A molded article comprising the antistatic resin composition according to any one of claims 1 to 3.   A laminate comprising the molded article comprising the antistatic resin composition according to any one of claims 1 to 3 laminated on at least one surface of a support comprising a thermoplastic polymer.

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