JP2019189791A - Resin composition for antistatic component - Google Patents

Abstract

To provide a resin composition for antistatic component which achieves both antistatic property and moldability.SOLUTION: A resin composition for antistatic component is formed by adding an antistatic agent and a flow improver.SELECTED DRAWING: None

Description

  The present invention relates to a resin composition for an antistatic component and a molded article comprising the resin composition for an antistatic component.

  Patent Document 1 introduces kneading conductive powder such as carbon black as a method for imparting antistatic properties to polybutylene terephthalate resin, polyamide resin, and the like.

  However, since these conductive powders generally have high thermal conductivity, there is a problem that if the amount added is increased, the fluidity is lowered and the moldability becomes disadvantageous.

  Patent Document 2 describes that the use of carbon black having a dibutyl phthalate oil absorption of 250 ml / 100 g or more is effective in ensuring the fluidity of the polybutylene terephthalate resin.

  On the other hand, Patent Document 3 describes that the use of carbon black having a dibutyl phthalate oil absorption of less than 100 ml / 100 g is effective in securing the fluidity of the polyester resin.

JP 09-048909 A JP 2009-155565 A JP 2006-023291 A

  An object of the present invention is to provide a resin composition for an antistatic component that has both antistatic properties and moldability.

  The present inventor has developed an antistatic component resin in which an antistatic agent and a fluidity improver are added in the course of research aimed at achieving both antistatic properties and moldability of the resin composition for antistatic components. The present inventors have found that the above problems can be solved by using the composition, and have completed the present invention.

That is, the present invention relates to the following (1) to (15).
(1) Charging containing 4.8 to 9.0 parts by mass of carbon black having a dibutyl phthalate oil absorption of 300 ml / 100 g or more and 0.01 to 5.00 parts by mass of a fluidity improver with respect to 100 parts by mass of the resin. Resin composition for prevention parts.
(2) The resin composition for an antistatic component according to (1), wherein the resin is a thermoplastic resin.
(3) The resin composition for an antistatic component according to (2), wherein the thermoplastic resin is a thermoplastic polyester resin.
(4) The resin composition for an antistatic component according to any one of (1) to (3), wherein the fluidity improver is a polyvalent hydroxyl group-containing compound having a hydroxyl value of 100 or more.
(5) The resin composition for an antistatic component according to any one of (2) to (4), wherein the thermoplastic resin is a polybutylene terephthalate resin.
(6) The resin composition for an antistatic component according to any one of (1) to (5), which has a melt viscosity of 200 kPa or less at 260 ° C. and 1,000 sec ⁻¹ measured according to ISO11443. .
(7) The resin composition for an antistatic component according to any one of (1) to (6), wherein the carbon black has a dibutyl phthalate oil absorption of 350 to 450 ml / 100 g.
(8) The resin composition for an antistatic component according to any one of (1) to (7), wherein the carbon black content is 5.0 to 7.5 parts by mass with respect to 100 parts by mass of the resin. .
(9) The resin composition for antistatic parts according to any one of (4) to (8), wherein the polyvalent hydroxyl group-containing compound has a hydroxyl value of 100 or more and 600 or less.
(10) The antistatic component according to any one of (4) to (9), wherein the content of the polyvalent hydroxyl group-containing compound is 0.05 to 2.5 parts by mass with respect to 100 parts by mass of the resin. Resin composition.
(11) A molded article comprising the resin composition for an antistatic component according to any one of (1) to (10).
(12) Carbon black of 5.0 to 8.0 parts by mass of a dibutyl phthalate oil absorption of 300 ml / 100 g or more and 0.01 to 5.00 parts by mass of a fluidity improver are added to 100 parts by mass of the resin. Use of fluidity improvers as antistatic aids.
(13) Use of the fluidity improver as an antistatic aid according to (12), wherein the resin is a thermoplastic resin.
(14) Use of the fluidity improver as an antistatic aid according to (13), wherein the thermoplastic resin is a thermoplastic polyester resin.
(15) Use of the fluidity improver according to any one of (12) to (14) as an antistatic aid, wherein the fluidity improver is a polyhydric hydroxyl group-containing compound having a hydroxyl value of 100 or more.

  ADVANTAGE OF THE INVENTION According to this invention, the resin composition for antistatic components which can make antistatic property and moldability compatible can be provided.

  Hereinafter, an embodiment of the present invention will be described in detail. The present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within a range that does not impair the effects of the present invention.

[Resin composition for antistatic parts]
Hereinafter, the detail of each component of the resin composition for antistatic components of this embodiment is illustrated and demonstrated.

(resin)
An example of the resin is a thermoplastic resin, preferably a polybutylene terephthalate resin (PBT resin). Although an appropriate fluidity improver varies depending on the resin, a PBT resin will be described below as an example.

The polybutylene terephthalate resin includes a dicarboxylic acid component containing at least terephthalic acid or an ester-forming derivative thereof (C _1-6 alkyl ester, acid halide, etc.), and an alkylene glycol (1,4-butane) having at least 4 carbon atoms. Diol) or a polybutylene terephthalate resin obtained by polycondensation with a glycol component containing an ester-forming derivative thereof (acetylated product or the like). In the present embodiment, the polybutylene terephthalate resin is not limited to homopolybutylene terephthalate resin, but may be a copolymer containing 60 mol% or more of butylene terephthalate units.

  The amount of terminal carboxyl groups of the polybutylene terephthalate resin is not particularly limited as long as the object of the present invention is not impaired, but is preferably 30 meq / kg or less, more preferably 25 meq / kg or less.

  The intrinsic viscosity of the polybutylene terephthalate resin is not particularly limited as long as it does not impair the object of the present invention, but it is preferably 0.60 dL / g or more and 1.2 dL / g or less, 0.65 dL / g or more and 0.9 dL / g More preferably, it is g or less. When a polybutylene terephthalate resin having an intrinsic viscosity in such a range is used, the resulting polybutylene terephthalate resin composition is particularly excellent in moldability. The intrinsic viscosity can also be adjusted by blending polybutylene terephthalate resins having different intrinsic viscosities. For example, a polybutylene terephthalate resin having an intrinsic viscosity of 0.9 dL / g is prepared by blending a polybutylene terephthalate resin having an intrinsic viscosity of 1.0 dL / g and a polybutylene terephthalate resin having an intrinsic viscosity of 0.7 dL / g. Can do. The intrinsic viscosity of the polybutylene terephthalate resin can be measured, for example, in o-chlorophenol at a temperature of 35 ° C.

In the preparation of polybutylene terephthalate resin, when an aromatic dicarboxylic acid other than terephthalic acid or an ester-forming derivative thereof is used as a comonomer component, for example, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4′- C _8-14 aromatic dicarboxylic acids such as dicarboxydiphenyl ether; C _4-16 alkane dicarboxylic acids such as succinic acid, adipic acid, azelaic acid and sebacic acid; C _5-10 cycloalkane dicarboxylic acids such as cyclohexane dicarboxylic acid Acid; ester-forming derivatives of these dicarboxylic acid components (C _1-6 alkyl ester derivatives, acid halides, etc.) can be used. These dicarboxylic acid components can be used alone or in combination of two or more.

Among these dicarboxylic acid components, C _8-12 aromatic dicarboxylic acids such as isophthalic acid, and C _6-12 alkanedicarboxylic acids such as adipic acid, azelaic acid, and sebacic acid are more preferable.

In the preparation of polybutylene terephthalate resin, when a glycol component other than 1,4-butanediol is used as a comonomer component, for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,3-butylene glycol, hexamethylene glycol, neopentyl C _2-10 alkylene glycol such as glycol and 1,3-octanediol; polyoxyalkylene glycol such as diethylene glycol, triethylene glycol and dipropylene glycol; alicyclic diol such as cyclohexanedimethanol and hydrogenated bisphenol A; bisphenol A, aromatic diols such as 4,4′-dihydroxybiphenyl; ethylene oxide 2-mole adduct of bisphenol A, propylene oxide of bisphenol A Such as 3 mole adduct, alkylene oxide adducts of C _2-4 of bisphenol A; or ester-forming derivatives of these glycols (acetylated, etc.) can be used. These glycol components can be used alone or in combination of two or more.

Among these glycol components, C _2-6 alkylene glycol such as ethylene glycol and trimethylene glycol, polyoxyalkylene glycol such as diethylene glycol, and alicyclic diol such as cyclohexanedimethanol are more preferable.

Examples of comonomer components that can be used in addition to the dicarboxylic acid component and the glycol component include 4-hydroxybenzoic acid, 3-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and 4-carboxy-4′-hydroxybiphenyl. Aromatic hydroxycarboxylic acids; aliphatic hydroxycarboxylic acids such as glycolic acid and hydroxycaproic acid; C _3-12 lactones such as propiolactone, butyrolactone, valerolactone, caprolactone (ε-caprolactone, etc.); esters of these comonomer components And forming derivatives (C _1-6 alkyl ester derivatives, acid halides, acetylated compounds, etc.).

  The content of the polybutylene terephthalate resin is preferably 30 to 100% by mass of the total mass of the resin composition, more preferably 40 to 99% by mass, and further preferably 50 to 98% by mass. .

(Antistatic agent)
As the antistatic agent used in the resin composition for an antistatic component of the present invention, carbon black is preferably exemplified. Examples of the carbon black include furnace black, ketjen black, channel black, acetylene black, and thermal black. Among these, ketjen black is preferable.

  When carbon black is used as an antistatic agent in the present invention, the carbon black dibutyl phthalate oil absorption is 300 ml / 100 g or more, preferably 320 ml / 100 g or more, preferably 350 ml / 100 g from the viewpoint of improving antistatic properties. More preferably, it is more preferably 375 ml / 100 g or more, still more preferably 380 ml / 100 g or more, and most preferably 390 ml / 100 g or more. On the other hand, from the viewpoint of moldability, the carbon black dibutyl phthalate oil absorption is preferably 500 ml / 100 g or less, more preferably 450 ml / 100 g or less, and even more preferably 425 ml / 100 g or less. More preferably, it is 420 ml / 100 g or less, and most preferably 410 ml / 100 g or less. When the amount of dibutyl phthalate oil absorption is in the above range, it is possible to provide a resin composition for an antistatic component that has both antistatic properties and moldability.

  When carbon black is used as an antistatic agent in the present invention, the amount of carbon black used is 4.8 to 9.0 parts by weight, preferably 5.0 to 8.0 parts by weight based on 100 parts by weight of the resin. It is a mass part, More preferably, it is 5.2-7.5 mass part, More preferably, it is 5.4-7.0 mass part, Most preferably, it is 5.5-6.5 mass part. When the amount of carbon black used is in the above range, it is possible to provide a resin composition for an antistatic component that has both antistatic properties and moldability.

  When carbon black is used as an antistatic agent in the present invention, the average primary particle size of the carbon black used is not particularly limited, but is preferably 5 to 100 nm in order not to impair mechanical properties. More preferably, it is -50 nm, and it is further more preferable that it is 30-40 nm. In addition, the average primary particle diameter in this invention is an arithmetic average particle diameter calculated | required by the electron microscope observation of 1000 particle | grains about carbon black before mix | blending in a resin composition.

(Fluidity improver)
As the fluidity improver used in the resin composition for an antistatic component of the present invention, a polyhydric hydroxyl group-containing compound having a hydroxyl value of 100 or more is preferably exemplified.

  The polyvalent hydroxyl group-containing compound is a compound having two or more hydroxyl groups in one molecule. This polyvalent hydroxyl group-containing compound works as a fluidity improver. Usually, when a fluidity improver is added to a resin, even if the fluidity can be improved, deterioration of properties such as mechanical strength and toughness of the resin itself cannot be avoided. However, by using the polyvalent hydroxyl group-containing compound, it is possible to efficiently improve the fluidity when the resin composition is melted while maintaining the properties of the resin at a high level.

  As the polyvalent hydroxyl group-containing compound, one produced by a conventionally known method may be used, or a commercially available product may be purchased and used.

  The polyhydric hydroxyl group-containing compound has a hydroxyl value measured in accordance with the Japan Oil Chemists' Society 2.3.6.2-1996 hydroxyl value (pyridine-acetic anhydride method) of 100 or more, preferably 200 or more. A hydroxyl value of 100 or more is preferable because the effect of improving the fluidity tends to increase. On the other hand, if the hydroxyl value is too large, the reaction with the resin proceeds excessively, which may reduce the molecular weight of the resin and impair excellent properties such as mechanical properties, heat resistance, and chemical resistance. There is a risk that the appearance defect of the molded product or mold contamination may occur due to the generation of gas. The preferred hydroxyl value is 1000 or less, and more preferably 600 or less.

  The content of the polyvalent hydroxyl group-containing compound is 0.01 to 5.00 parts by mass, preferably 0.05 to 2.5 parts by mass, more preferably 0.10 to 100 parts by mass of the resin. It is 2.00 mass parts, Most preferably, it is 0.10-1.00 mass part. If the content is less than 0.01 parts by mass, the effect of improving the fluidity cannot be sufficiently obtained, and if it exceeds 5.00 parts by mass, bleeding from the molded product occurs or gas is generated during molding. There is a possibility that the appearance defect of the molded product or mold contamination will be caused.

  From the viewpoint of imparting fluidity at the time of melting to the resin composition, or from the viewpoint of imparting almost no deterioration in the physical properties of the resin to the resulting molded product, a polyhydric alcohol fatty acid such as glycerin fatty acid ester is used as the polyvalent hydroxyl group-containing compound. It is preferable to use an ether obtained by addition polymerization of an alkylene oxide to an ester or (poly) glycerin. Next, specific examples are shown in the order of polyhydric alcohol fatty acid ester and ether obtained by addition polymerization of alkylene oxide to (poly) glycerin. In addition, (poly) glycerin refers to the dehydration condensate of glycerin and / or glycerin.

  First, polyhydric alcohol fatty acid ester is ester which consists of polyhydric alcohols, such as glycerol, and / or its dehydration condensate, and a fatty acid. Among the polyhydric alcohol fatty acid esters, those obtained using a fatty acid having 12 or more carbon atoms are preferred. Examples of the fatty acid having 12 or more carbon atoms include lauric acid, oleic acid, palmitic acid, stearic acid, 12-hydroxystearic acid, behenic acid, and montanic acid. Fatty acids having 12 to 32 carbon atoms are preferred, and fatty acids having 12 to 22 carbon atoms are particularly preferred. Specifically, lauric acid, stearic acid, 12-hydroxystearic acid or behenic acid is particularly preferable. It is preferable to use a fatty acid having 12 or more carbon atoms because the heat resistance of the resin can be sufficiently maintained, and bleeding of the polyvalent hydroxyl group-containing compound in a high temperature environment tends to be suppressed. A carbon number of 32 or less is preferable because the effect of improving the fluidity is high. Preferred polyhydric alcohols include (poly) glycerin such as glycerin and diglycerin, pentaerythritol, dipentaerythritol and the like.

  Examples of preferred polyhydric alcohol fatty acid esters include glycerin monostearate, glycerin monobehenate, diglycerin monostearate, triglycerin monostearate, triglycerin stearic acid partial ester, tetraglycerin stearic acid partial ester, decaglycerin lauric acid Examples include partial esters, glycerin mono-12-hydroxystearate, and pentaerythritol stearic acid partial esters.

  Examples of ethers obtained by addition polymerization of alkylene oxide to (poly) glycerin include polyoxypropylene diglyceryl ether obtained by addition polymerization of propylene oxide to diglycerin, and addition polymerization of ethylene oxide to diglycerin. The polyoxyethylene diglyceryl ether obtained is mentioned. In the present invention, among these ethers, use of polyoxyethylene diglyceryl ether is particularly preferable.

  In addition, polyhydric alcohol compounds containing alkylene oxide units such as ethers obtained by addition polymerization of alkylene oxide to (poly) glycerin are usually liquids, so that they are easy to handle or stable in a high temperature environment. From this viewpoint, it is more preferable to use a solid polyhydric alcohol fatty acid ester.

(filler)
A filler is used in the composition of the present invention as necessary. Such a filler is preferably blended in order to obtain excellent properties such as mechanical strength, heat resistance, dimensional stability, and electrical properties, and is particularly effective for increasing the rigidity. Depending on the purpose, a fibrous, granular or plate-like filler is used.

  Examples of the fibrous filler include glass fiber, asbestos fiber, carbon fiber, silica fiber, silica / alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, boron fiber, potassium titanate fiber, stainless steel, aluminum, titanium, Examples thereof include metal fibrous materials such as copper and brass. High-melting organic fibrous materials such as polyamide, fluororesin and acrylic resin can also be used.

  As granular fillers, quartz powder, glass beads, glass powder, calcium silicate, aluminum silicate, kaolin, talc, clay, diatomaceous earth, wollastonite and other silicates, iron oxide, titanium oxide, alumina and other metal oxides Products, carbonates of metals such as calcium carbonate and magnesium carbonate, sulfates of metals such as calcium sulfate and barium sulfate, silicon carbide, silicon nitride, boron nitride, various metal powders and the like.

  Examples of the plate-like inorganic filler include mica, glass flakes, various metal foils and the like.

  The kind of filler is not particularly limited, and one or more kinds of fillers can be added. In particular, it is preferable to use potassium titanate fiber, mica, talc, or wollastonite.

  The addition amount of the filler is not particularly limited, but is preferably 200 parts by mass or less with respect to 100 parts by mass of the resin. When the filler is added excessively, the moldability is inferior and the toughness is reduced.

(Additive)
Furthermore, in order to impart desired properties, the composition of the present invention can be used in combination with known substances that are generally added to thermoplastic resins and the like. For example, stabilizers such as antioxidants, ultraviolet absorbers, light stabilizers, hydrolysis resistance improvers, lubricants, mold release agents, colorants such as dyes and pigments, flame retardants, flame retardant aids, etc. It is possible. In particular, the addition of an antioxidant for improving the heat resistance is effective.

[Method for producing resin composition for antistatic component]
The form of the resin composition for an antistatic component of the present invention may be a powder mixture or a molten mixture (melt kneaded material) such as pellets. The manufacturing method of the resin composition of one Embodiment of this invention is not specifically limited, It can manufacture using the installation and method known in the said technical field. For example, necessary components can be mixed and kneaded using a single or twin screw extruder or other melt kneader to prepare pellets for molding. A plurality of extruders or other melt kneaders may be used. Moreover, all the components may be charged simultaneously from the hopper, or some components may be charged from the side feed port.

  Moreover, when manufacturing the resin composition for antistatic components of this invention, it is preferable to manufacture, after previously drying each component to add. For drying, a commonly used evaporator or oven can be used.

[Example]
EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to a following example, unless the summary is exceeded.

(Examples 1-3)
Polybutylene terephthalate resin (manufactured by Wintech Polymer Co., Ltd., intrinsic viscosity 0.76 dL / g, polybutylene terephthalate resin with terminal carboxyl group amount 22 meq / kg), carbon black (average primary particle size 35 nm, dibutyl phthalate oil absorption 396 ml / 100 g ), Glass fiber (ECS03T-187 manufactured by Nippon Electric Glass Co., Ltd.), polyhydric alcohol fatty acid ester (glycerin mono 12-hydroxystearate having a hydroxyl value of 420) as a fluidity improver in the blending amounts shown in Table 1, The components were weighed and mixed to obtain a polybutylene terephthalate resin composition.

(Comparative Example 1)
As shown in Table 1, unlike Examples 1 to 3, a polybutylene terephthalate resin composition was obtained without using an antistatic agent (carbon black) or a fluidity improver.

(Comparative Examples 2 to 5)
As shown in Table 1, unlike Examples 1 to 3, a polybutylene terephthalate resin composition was obtained without using a fluidity improver. In Comparative Examples 3 and 4, 6.1 parts by mass and 9.4 parts by mass of carbon black having an average primary particle diameter of 41 nm and a dibutyl phthalate oil absorption of 280 ml / 100 g were used. In Comparative Examples 5 and 6, the average primary was used. Carbon black having a particle diameter of 22 nm and a dibutyl phthalate oil absorption of 116 ml / 100 g was used in an amount of 6.1 parts by mass and 8.1 parts by mass, respectively.

(Comparative Examples 7-9)
Polybutylene terephthalate resin, carbon black (average primary particle size 35 nm, dibutyl phthalate oil absorption 396 ml / 100 g), glass fiber, polyhydric alcohol fatty acid ester as a fluidity improver (glycerin mono 12-hydroxystearate having a hydroxyl value of 420) ) In the blending amounts shown in Table 1, each component was weighed and mixed to obtain a polybutylene terephthalate resin composition.

(Comparative Example 10)
Polybutylene terephthalate resin, glass fiber, polyhydric alcohol fatty acid ester (glycerin mono 12-hydroxystearate having a hydroxyl value of 420) as a fluidity improver is weighed and mixed in the blending amounts shown in Table 1, A polybutylene terephthalate resin composition was obtained.

(Comparative Example 11)
Polybutylene terephthalate resin, carbon black (average primary particle size 35 nm, dibutyl phthalate oil absorption 396 ml / 100 g), glass fiber, polyhydric alcohol fatty acid ester not corresponding to fluidity improver (pentaerythritol tetrastearate having a hydroxyl value of 20) Each component was weighed and mixed in the blending amounts shown in Table 1 to obtain a polybutylene terephthalate resin composition.

Each composition of Examples and Comparative Examples was injection-molded with an injection molding machine at a cylinder temperature of 270 ° C., a mold temperature of 60 ° C., an injection speed of 13 mm / sec, and a holding pressure of 60 MPa, and a flat plate shape of 80 mm × 80 mm × 3 mm. A specimen was obtained. The volume resistivity was measured according to IEC60093 using the obtained test piece. Further, the melt viscosity at 260 ° C. and 1000 sec ⁻¹ of each composition was measured according to ISO11443. The results are shown in Table 1.

  As shown in Table 1, the volume resistivity is decreased by adding the antistatic agent and the fluidity improver as in Examples 1 to 3 with respect to Comparative Example 1 in which the antistatic agent and the fluidity improver are not used. The result that (antistatic property improved) was obtained.

  Moreover, from the result of Comparative Example 2, when the fluidity improver was not used, the fluidity was disadvantageous (high melt viscosity). Furthermore, from the results of Comparative Examples 3 and 4, it was found that when the anti-static agent having a low dibutyl phthalate oil absorption amount was used without using the fluidity improver, both the volume resistivity and the melt viscosity were high. Further, from the results of Comparative Examples 5 and 6, when no anti-flow agent was used and an antistatic agent having a lower dibutyl phthalate oil absorption was used, there was no problem with the melt viscosity, but the volume resistivity was high. The result was obtained. That is, as the dibutyl phthalate oil absorption of the antistatic agent decreases, the increase in melt viscosity is suppressed, but the volume resistivity tends to increase, while the dibutyl phthalate oil absorption of the antistatic agent increases. As the volume resistivity decreases, the melt viscosity tends to increase, and the effect of the antistatic agent's dibutyl phthalate oil absorption on the antistatic property and moldability is in a trade-off relationship. It was confirmed that it was difficult to achieve both antistatic properties and moldability only by adjusting the dibutyl oil absorption.

Further, from the results of Comparative Examples 7 to 9, it was found that when the antistatic agent is small, the antistatic effect cannot be obtained, and when the antistatic agent is large, the fluidity is disadvantageous (high melt viscosity). That is, it has been confirmed that it is difficult to achieve both antistatic properties and moldability only by adjusting the addition amount of the antistatic agent. In Comparative Example 9, even though the charging can be prevented, the volume resistivity is too low, so that the desired characteristics are deteriorated in that the insulation necessary for use as an insulating component is impaired. It has not been achieved. In addition, although the volume resistivity calculated | required by the use of a final molded product changes, it is preferable that it is 1.0 * 10 < ⁷ > ohm * cm or more in the surface of insulation, and 1.0 * in the surface of antistatic property. It is preferably less than 10 ¹⁴ Ω · cm.
Further, from the results of Comparative Example 10, when only the fluidity improver was added without using the antistatic agent, the antistatic property was compared with Comparative Example 1 where neither the antistatic agent nor the fluidity improver was added. The results show that the antistatic effect of the fluidity improver is a synergistic effect obtained only when used in combination with the antistatic agent. That is, the fluidity improver in the present invention not only improves moldability, but also when used in combination with an antistatic agent, it is a foreign and anticipatory improvement in antistatic properties that could not be obtained with the fluidity improver alone. It plays a role as an antistatic improvement aid that brings about an unexpected effect.
In addition, from the results of Comparative Example 11, even when the polyhydric alcohol fatty acid ester is not a fluidity improver, when a low hydroxyl value is added, even if the antistatic effect by carbon black is obtained, The synergistic effect with the polyhydric alcohol fatty acid ester was not obtained, and the fluidity was disadvantageous (high melt viscosity).

Claims (15)

  For antistatic parts, containing 4.8 to 9.0 parts by mass of carbon black having a dibutyl phthalate oil absorption of 300 ml / 100 g or more and 0.01 to 5.00 parts by mass of a fluidity improver with respect to 100 parts by mass of the resin Resin composition.   The resin composition for an antistatic component according to claim 1, wherein the resin is a thermoplastic resin.   The resin composition for an antistatic component according to claim 2, wherein the thermoplastic resin is a thermoplastic polyester resin.   The resin composition for an antistatic component according to any one of claims 1 to 3, wherein the fluidity improver is a polyvalent hydroxyl group-containing compound having a hydroxyl value of 100 or more.   The resin composition for an antistatic component according to any one of claims 2 to 4, wherein the thermoplastic resin is a polybutylene terephthalate resin. The resin composition for antistatic parts according to any one of claims 1 to 5, wherein the melt viscosity at 260 ° C and 1,000 sec ^-1 measured according to ISO 11443 is 200 kPa or less.   The resin composition for an antistatic component according to any one of claims 1 to 6, wherein the carbon black has a dibutyl phthalate oil absorption of 350 to 450 ml / 100 g.   The resin composition for an antistatic component according to any one of claims 1 to 7, wherein the carbon black content is 5.0 to 7.5 parts by mass with respect to 100 parts by mass of the resin.   The resin composition for an antistatic component according to any one of claims 4 to 8, wherein the polyvalent hydroxyl group-containing compound has a hydroxyl value of 100 or more and 600 or less.   The resin composition for an antistatic component according to any one of claims 4 to 9, wherein the content of the polyvalent hydroxyl group-containing compound is 0.05 to 2.5 parts by mass with respect to 100 parts by mass of the resin.   The molded article which consists of a resin composition for antistatic components as described in any one of Claims 1-10.   Addition of 5.0 to 8.0 parts by mass of carbon black having a dibutyl phthalate oil absorption of 300 ml / 100 g or more and 0.01 to 5.00 parts by mass of a fluidity improver with respect to 100 parts by mass of the resin. Use of antistatic agents as antistatic agents.   Use of a fluidity improver as an antistatic aid according to claim 12, wherein the resin is a thermoplastic resin.   Use of a fluidity improver as an antistatic aid according to claim 13, wherein the thermoplastic resin is a thermoplastic polyester resin.   Use of the fluidity improver according to any one of claims 12 to 14 as an antistatic aid, wherein the fluidity improver is a polyvalent hydroxyl group-containing compound having a hydroxyl value of 100 or more.