JP4599211B2 - Thermoplastic resin composition, process for producing the same, and molded article thereof - Google Patents

Description

  The present invention relates to a thermoplastic resin composition, and more particularly relates to a thermoplastic resin composition excellent in conductivity, impact resistance, rigidity, fluidity, and flame retardancy, a production method thereof, and a molded body thereof. .

In recent years, information processing apparatuses and electronic office equipment are rapidly spreading due to the development of electronics technology. Along with this, troubles such as electromagnetic interference, malfunctions due to static electricity, etc., in which noise generated from electronic components affects peripheral devices are increasing, becoming a serious problem.
In order to solve these problems, a material excellent in conductivity (antistatic) property and antistatic property is required.
Since the polymer material has low conductivity, a polymer material having a high conductivity by blending it with a conductive filler or the like is widely used.
As the conductive filler, metal fiber, metal powder, carbon black, carbon fiber, etc. are generally used. However, when metal fiber or metal powder is used as the conductive filler, there is an excellent conductivity imparting effect, but corrosion resistance There is a disadvantage that it is inferior in properties and it is difficult to obtain mechanical strength.
On the other hand, when carbon black is used as a conductive filler, conductive carbon black such as ketjen black, Vulcan XC72, and acetylene black, which can obtain high conductivity with a small amount of addition, is used. Dispersibility is poor. In addition, since the dispersibility of carbon black affects the conductivity of the resin composition, a unique formulation and mixing technique are required to obtain stable conductivity.

Moreover, when carbon fiber is used as a conductive filler, desired strength and elastic modulus can be obtained, but high filling is required to impart conductivity, and the original physical properties of the resin are lowered. Furthermore, when trying to obtain a molded product having a complicated shape, the carbon fiber as the conductive filler is displaced, resulting in variations in conductivity, and satisfactory physical properties cannot be obtained.
When blending carbon fibers, if the amount of carbon fibers is the same, it is expected that the smaller the fiber diameter, the greater the contact area between the resin and the fibers, and thus excellent conductivity. However, when carbon fibers are mixed with a resin, there is a problem that the dispersibility in the resin is poor and the surface appearance of the molded product is impaired.

On the other hand, carbon nanomaterials have received attention because of their low density and excellent strength, stability, electrical properties, etc., and their application is expected. Combinations of thermoplastic resins, particularly polycarbonate resins and carbon nanomaterials have been proposed. However, since carbon nanomaterials are expensive, there is a practical problem of how to efficiently exhibit characteristics with a small addition amount.
For example, Patent Document 1 describes a resin composition obtained by blending a carbon nanomaterial with one or more compounds selected from a thermoplastic resin, a phosphorus compound, a phenol compound, an epoxy compound, and a sulfur compound. Yes. However, there is no description about the combination of a polycarbonate resin and a terpene compound.

  Patent Document 2 describes a resin composition comprising a thermoplastic resin, a carbon nanotube, a flame retardant, and a polyfluoroolefin resin. However, this resin composition is a composition that requires a high degree of flame retardancy, and a reduction in impact strength is inevitable with the addition of a flame retardant. Patent Document 2 describes a case where 97 parts by mass of a polycarbonate resin and 3 parts by mass of a carbon nanotube are blended as Comparative Example 1, but a molded appearance due to an increase in melt viscosity and non-uniform dispersion of carbon nanotubes. There is a problem of poorness and variation in conductivity.

Patent Document 3 describes a resin composition in which a terpene resin is blended with a polymer alloy of a polycarbonate resin and a styrene resin. In Patent Document 3, the inclusion of a terpene resin contributes to compatibilization of a polycarbonate resin and a styrene resin, and also improves the dispersibility of the flame retardant and is effective in improving the weld appearance and weld strength in the injection molded product. It is disclosed that there is. However, there is no description about blending a carbon nanomaterial with a polycarbonate resin.
In addition, if a large amount of carbon nanomaterial is blended in order to develop the conductive performance, it may cause poor molding appearance and carbon dropout, resulting in a decrease in impact resistance strength. Sufficient studies have not been made on improving the dispersibility of materials.

JP 2004-182842 A JP 2003-221510 A JP 2000-63651 A

  In the present invention, by adding a terpene compound to a thermoplastic resin, the carbon nanomaterial can be dispersed well without dropping, and conductive (antistatic) property, fluidity, flame retardancy, impact resistance and molding It is an object of the present invention to provide a thermoplastic resin composition excellent in appearance and the like, a production method thereof and a molded body thereof.

  As a result of intensive studies on the above problems, the present inventors have formulated a predetermined amount of a carbon nanomaterial into a specific proportion of a thermoplastic resin and a terpene compound, whereby the terpene compound is dispersed in the carbon nanomaterial. Even when carbon nanomaterial is added in the range of 0.1 to 30 parts by weight, it has been found that high conductivity performance is exhibited by suppressing the drop of carbon, fluidity and moldability. It came to be completed.

That is, the present invention
(C) Carbon nanomaterial 0.1-30 mass with respect to 100 mass parts of resin component which consists of 80-99 mass% of (A) aromatic polycarbonate resin and 20-1 mass% of (B) terpene type compounds. A thermoplastic resin composition comprising a part,
(2) The thermoplastic resin composition according to (1), wherein the component (B) is at least one selected from a terpene resin, a hydrogenated terpene resin, a terpene-phenol resin, and a terpene-bisphenol A resin ,
(3) The thermoplastic resin composition according to the above (1) or (2), wherein the viscosity average molecular weight of the component (A) is 10,000 to 40,000,
(4) The thermoplastic resin composition according to (1) to (3), wherein the component (C) is one or more carbon nanomaterials selected from carbon nanotubes, carbon nanohorns, fullerenes, and carbyne materials,
(5) The thermoplasticity of (4) above, wherein the content of amorphous carbon particles contained in the carbon nanotube is 20% by mass or less, the outer diameter of the carbon nanotube is 0.5 to 120 nm, and the length is 500 nm or more. Resin composition,
(6) The heat of (1) to (5) above, wherein the component (C) is added to the component (B) and kneaded, and then the component (A) is added to the kneaded product and further melt-kneaded. Method for producing a plastic resin composition,
(7) A molded article obtained by using the thermoplastic resin composition of (1) to (6) above is provided.

  Since the thermoplastic resin composition of the present invention improves the dispersibility of the carbon nanomaterial by including the thermoplastic resin, the terpene compound, and the carbon nanomaterial in a specific ratio, the amount of the carbon nanomaterial added is small. The carbon nanomaterial does not fall off, and a molded body excellent in conductivity, impact resistance, rigidity, flame retardancy, fluidity, molding appearance, and the like can be obtained.

In the thermoplastic resin composition of the present invention, a combination of (A) thermoplastic resin 80 to 99% by mass and (B) terpene compound 20 to 1% by mass is used as the resin component.
In the resin component, if the content of the component (A) and the component (B) is in the above range, the obtained resin composition exhibits the characteristics of the thermoplastic resin sufficiently, and the carbon of the component (C) The dispersibility of the nanomaterial is improved.
Moreover, in the thermoplastic resin composition of this invention, 0.1-30 mass parts of (C) carbon nanomaterial is preferable with respect to 100 mass parts of total amounts of (A) component and (B) component, Preferably it is 0. 5 to 10 parts by mass are blended.
By setting the blending amount of the carbon nanomaterial to 0.1 parts by mass or more, the conductivity (antistatic) property and flame retardancy of the thermoplastic resin composition are improved, and by blending the carbon nanomaterial to 30 parts by mass or less. As a result, the performance is improved and the impact resistance and formability are increased.

  Examples of the thermoplastic resin (A) of the present invention include aromatic polycarbonate resin, styrene resin, polyethylene resin, polypropylene resin, polymethyl methacrylate resin, polyvinyl chloride resin, cellulose acetate resin, polyamide resin, polyester resin (PET , PBT, etc.), polyacrylonitrile resin, acrylonitrile-butadiene-styrene resin (ABS), polyphenylene oxide resin (PPO), polyketone resin, polysulfone resin, polyphenylene sulfide resin (PPS), fluororesin, silicon resin, polyimide resin, polybenz Examples thereof include imidazole resins, polyamide elastomers, and copolymers of these with other monomers.

  There is no restriction | limiting in particular as an aromatic polycarbonate resin. Usually, an aromatic polycarbonate resin produced by a reaction between a dihydric phenol and a carbonate precursor can be used. This aromatic polycarbonate resin is produced by reacting a dihydric phenol and a carbonate precursor by a solution method or a melting method, that is, a reaction of a dihydric phenol and phosgene, a transesterification method of a dihydric phenol and diphenyl carbonate, or the like. be able to.

  There is no restriction | limiting in particular as bivalent phenol. For example, 2,2-bis (4-hydroxyphenyl) propane [bisphenol A], bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxy -3,5-dimethylphenyl) propane, 4,4'-dihydroxydiphenyl, bis (4-hydroxyphenyl) cycloalkane, bis (4-hydroxyphenyl) oxide, bis (4-hydroxyphenyl) sulfide, bis (4- Hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide, bis (4-hydroxyphenyl) ketone, etc., or halogen-substituted products thereof. Examples of other dihydric phenols include hydroquinone, resorcin, and catechol.

Particularly preferred dihydric phenols are bis (hydroxyphenyl) alkanes, especially bisphenol A.
Examples of the carbonate precursor include carbonyl halide, carbonyl ester, or haloformate, and more specifically, phosgene, dihaloformate of dihydric phenol, diphenyl carbonate, dimethyl carbonate, diethyl carbonate, and the like.
Said dihydric phenol and carbonate precursor can be used individually or in mixture of 2 or more types.

In addition, the aromatic polycarbonate resin may have a branched structure. As a branching agent, 1,1,1-tris (4-hydroxyphenyl) ethane, α, α ′, α ″ -tris (4-hydroxyphenyl) -1,3,5-triisopropylbenzene, phloroglucin, trimellit Acid, isatin bis (o-cresol), or the like can be used.
Moreover, phenol, pt-butylphenol, pt-octylphenol, p-cumylphenol, or the like can be used to adjust the molecular weight.

The aromatic polycarbonate resin used in the present invention may be a copolymer having a polycarbonate part and a polyorganosiloxane part, or a polycarbonate resin containing this copolymer. Further, it may be a polyester-polycarbonate resin obtained by polymerizing a polycarbonate in the presence of a bifunctional carboxylic acid such as terephthalic acid or an ester precursor such as an ester-forming derivative thereof. A mixture of the above various aromatic polycarbonate resins can also be used.
The viscosity average molecular weight of the aromatic polycarbonate resin of the present invention is usually 10,000 to 40,000, preferably 13,000 to 30,000, more preferably from the viewpoint of mechanical strength and moldability. 14,000-27,000.

The (B) terpene compound of the present invention means a hydrocarbon having a composition of (C ₅ H ₈ ) _n and an oxygen-containing compound derived therefrom and those having different degrees of unsaturation.
More specifically, terpene monomer (C ₁₀ H ₁₆ ) alone or terpene monomer and aromatic vinyl monomer, those obtained by copolymerization of terpene monomer and phenol, and the like can be mentioned. It is done. Moreover, the hydrogenated terpene type compound obtained by hydrogenating the obtained terpene type compound may be sufficient. Here, as the terpene monomer, α-pinene, β-pinene, dipentene, d-limonene and the like, as the aromatic vinyl monomer, styrene, α-methylstyrene, vinyl toluene and the like, as phenols, Phenol, cresol, bisphenol A and the like can be exemplified. These terpene compounds can be obtained by reacting in the presence of a Friedel-Craft type catalyst in an organic solvent together with a terpene monomer alone or an aromatic vinyl monomer and phenols.
That is, examples of the terpene compound include a terpene resin, a hydrogenated terpene resin, a terpene-phenol resin, and a terpene-bisphenol A resin. Generally, those containing phenols, such as terpene-phenol resin and terpene-bisphenol A resin, have higher fluidity and conductivity due to dispersion of carbon nanomaterials.
In the resin component comprising (A) a thermoplastic resin and (B) a terpene compound, the component (A) is 80 to 99% by mass and the component (B) is 20 to 1% by mass. (B) When the terpene compound is less than 1% by mass, the conductivity and fluidity are insufficient, and when it exceeds 20% by mass, the impact strength and heat resistance are lowered, and surface layer peeling or the like may occur.

(C) Carbon nanomaterials include carbon nanotubes, carbon nanohorns, fullerenes, carbyne materials, and the like.
The carbon nanotube is a tubular carbon polyhedron having a structure in which a graphite (graphite) sheet having a carbon six-membered ring structure as a main structure is closed in a cylindrical shape. It is generally hollow fiber having a diameter of 0.1 to 300 nm and an aspect ratio of 10 to 1000, and is a fluid catalytic chemical vapor deposition method (CCVD method), chemical vapor deposition method (CVD method), laser ablation method, carbon It can be produced by an arc discharge method using a rod, carbon fiber or the like.
The carbon nanotube includes a single-walled nanotube having a structure in which a single-layer graphite sheet is closed in a cylindrical shape, and a multi-walled nanotube having a multi-layered structure in which several graphite sheets are closed in a concentric shape. The carbon nanotubes that can be used are not particularly limited, but single-walled or multi-walled nanotubes having a diameter of 0.5 to 120 nm, particularly a diameter of 1 to 100 nm are preferable from the viewpoint of mass productivity and price. As multi-walled nanotubes, Sunnanotech multiwall, NTP surface treatment (carboxylic acid, hydroxyl group added) multiwall, Showa Denko Co., Ltd. trade names VGCF III, VGCF IV, Hyperion Catalysis International Trade names of Graphite Fibrils Grades BN, trade names of MWCNT manufactured by Nikkiso Co., Ltd., trade names of Carbel manufactured by GSI Creos, carbon nanotubes manufactured by Honjo Chemical Co., Ltd., and the like.

The carbon nanohorn is a carbon nanomaterial having a conical shape in which the tip of the carbon nanotube is closed. Carbon nanohorns can be produced mainly by a laser evaporation method of a solid graphite simple substance.
Fullerenes, those 60 or more carbon atoms to form a strongly bonded to spherical or tubular in closed network structure, C ₆₀ is a spherical molecule of the soccer ball and the same shape are typical, C ₇₀ Higher order fullerenes such as C ₈₀ and C ₉₀ can also be used.

The carbyne-based material is a carbon material having a polyin structure or a cumulene structure in part or all of the main chain skeleton. The calvin material can be manufactured by a physical method or a chemical method. As a physical method, (a) a method for producing a carbon material containing carbine by ion sputtering or arc discharge of graphite, and (b) a method for obtaining a carbine-like carbon material by irradiating a polyvinyl chloride film with a laser in vacuum. Etc. Further, as a chemical method, (c) a method in which a deacetylation reaction of acetylene is performed in a copper chloride solution, (d) a chlorinated polyacetylene to produce a halogenated polyacetylene having excellent stereoregularity, and the dehydrohalogenation (E) A method of synthesizing acetylene in the presence of oxygen using a catalyst comprising a cuprous salt and a tertiary amine as a ligand (Japanese Patent Publication No. 3-44582), (f) Examples thereof include a method by electrode reduction of diiodoacetylene in the presence of a nickel catalyst.
Among the carbon nanomaterials, carbon nanotubes are particularly preferable.
These carbon nanomaterials can be used alone or in admixture of two or more.

When a carbon nanotube is used as the carbon nanomaterial (C) of the present invention, the outer diameter is preferably 0.5 to 120 nm, more preferably 1 to 100 nm. When the outer diameter of the carbon nanotube is 0.5 nm or more, the dispersion is easy and the conductivity (antistatic property) is improved. When the outer diameter is 120 nm or less, the appearance of the molded product is good and the conductivity (charging) Prevention) is also improved. When the outer diameter of the carbon nanomaterial is in the range of 0.5 to 120 nm, a much larger number (about 10 ⁶ times) than the carbon fiber can be blended. High pass formation efficiency and excellent cost performance.
The length of the carbon nanotube is preferably 500 nm or more, more preferably 800 to 15,000 nm. When the length of the carbon nanotube is 500 nm or more, particularly 800 nm or more, the conductivity (antistatic) is sufficient, and when the length is 15,000 nm or less, the appearance of the molded product is good and easy to disperse. It becomes.

The terminal shape of the carbon nanotube is not necessarily cylindrical, and may be deformed, for example, conical. Further, either a closed structure or an open structure can be used, but a structure having an open terminal is preferable.
A carbon nanotube having a closed end can be opened by a chemical treatment such as nitric acid.

In addition, from the viewpoint of electrical conductivity (antistatic property) and flame retardancy of the thermoplastic resin composition, the content of amorphous carbon particles contained as impurities in the carbon nanotube is preferably 20% by mass or less. By setting the amorphous carbon particles to 20% by mass or less, more preferably 10% by mass or less, the conductivity (antistatic) performance is improved, and the deterioration during molding is effective.
Further, when the surface of the carbon nanotube is subjected to surface treatment such as acid treatment and oxidation treatment, and the functional group such as carboxylic acid or hydroxyl group is added to the surface, the conductivity is improved. The amount of the functional group is not particularly limited, but is preferably 0.5 to 10% by mass with respect to the amount of carbon nanotubes.

  The thermoplastic resin composition of the present invention has other resins and additives such as pigments, dyes, reinforcing agents, fillers, heat resistance agents, oxidative degradation inhibitors, at the time of mixing and molding, as long as the physical properties are not impaired. Weathering agents, lubricants, mold release agents, crystal nucleating agents, plasticizers, fluidity improvers, antistatic agents and the like can be added.

Moreover, the thermoplastic resin composition of this invention can also be manufactured using the masterbatch of a terpene type compound and a carbon nanomaterial.
As a manufacturing method of the thermoplastic resin composition of this invention, the method of melt-kneading each component by a conventionally well-known method is mentioned.
For example, a method in which each component is dispersed and mixed with a high-speed mixer represented by a turnbull mixer, a Henschel mixer, a ribbon blender, or a super mixer, and then melt-kneaded with an extruder, a Banbury mixer, a roll, or the like is appropriately selected.
As a manufacturing method, each component may be added all at once and melt-kneaded. However, after melt-kneading a terpene compound and a carbon nanomaterial in advance, if a thermoplastic resin or the like is melt-kneaded, the conductivity (antistatic property) is improved. The phase structure of the thermoplastic resin and the terpene compound is stabilized.
As a melt-kneading method, in a state where the terpene compound and the carbon nanomaterial are melted, other components such as a thermoplastic resin may be added from the middle of the extruder, or the terpene compound and the carbon nanoparticle prepared in advance may be added. A master batch of materials may be used. As a carbon nanomaterial amount in a masterbatch, 5-40 mass% is preferable.
By blending the carbon nanomaterial, the phase structure of the thermoplastic resin and the terpene compound is stabilized, and the re-aggregation of the terpene compound during melting and the domain orientation during injection molding can be reduced.

Since the thermoplastic resin composition of the present invention has the above-mentioned properties, for example, it is used for OA equipment, information / communication equipment, automobile parts, home appliances, etc., and is an aromatic polycarbonate resin with a flame retardancy standard of UL-94. The composition, ABS resin composition, and PET resin composition can be suitably used as V-2 class, and the PPS resin composition and PPO resin composition can be used as V-0 class.
The present invention also provides a molded article obtained by using the thermoplastic resin composition. The molding method is not particularly limited, and molding methods such as injection molding, injection compression molding, extrusion molding, and hollow molding can be applied.

The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to these examples.
Examples 1-10 and Comparative Examples 1-7
Each component is blended in the proportions (parts by mass) shown in Table 1 and Table 2, supplied to a vent type twin screw extruder (model name: TEM35, manufactured by Toshiba Machine Co., Ltd.), melt-kneaded at 280 ° C., pellets Turned into. The obtained pellets were dried at 120 ° C. for 10 hours, and then injection-molded at a molding temperature of 280 ° C. (mold temperature of 80 ° C.) to obtain test pieces.
The performance was evaluated by the following method using the obtained test piece, and the result is shown in Table 1.

The blending components and performance evaluation methods used are shown below.
[Composition ingredients]
(A) Thermoplastic resin ・ Aromatic polycarbonate resin (PC resin)
Product name: A1900 [made by Idemitsu Kosan Co., Ltd.], viscosity average molecular weight = 19,500
・ Acrylonitrile-butadiene-styrene resin (ABS)
Product Name: AT-05 [Japan A & L Co.]
・ Polyester resin (PET)
Product Name: Diamond Knight MA523 (Mitsubishi Rayon Co., Ltd.)
・ Polyphenylene sulfide resin (PPS)
Product name: LR2G (made by ICP Corporation)
・ Polyphenylene oxide resin (PPO)
Product name: Blendex HP820 (manufactured by GE Specialty Chemicals)
(B) Terpene compound 1: α-pinene-phenol copolymer Product name: Mighty Ace G150 (Yasuhara Chemical Co., Ltd.)
(B) Terpene compound 2: α-pinene copolymer Product name: Clearon P125 (Yasuhara Chemical Co., Ltd.)
(C) Carbon nanomaterial 1: carbon nanotube 1
Multi-wall, diameter 10-30 nm, length 1-10 μm, open at both ends, amorphous carbon particle amount 10% (manufactured by Sun Nanotech)
(C) Carbon nanomaterial 2: carbon nanotube 2
Surface treatment (carboxylic acid, hydroxyl group added) multi-wall, diameter 10-30 nm, length 5-15 μm, both ends opening, amorphous carbon particle amount 3% (manufactured by NTP, trade name: L-MWNT1030)
[(B) + (C)]: Master batch using terpene compound 2 (70 mass%) and carbon nanotube 1 (30 mass%). Using the above twin screw extruder (TEM-35), it was produced at a set temperature of 220 ° C.

[Performance evaluation method]
(1) MI (melt index)
In accordance with ASTM D-1238, the aromatic polycarbonate resin was measured at 280 ° C., the others were at the temperatures described in the MI column of Table 2, and the load was 1.2 kg.
(2) IZOD impact strength: Conforms to ASTM D256. 23 ° C [wall thickness 1/8 inch (0.32 cm)]
(3) Flexural modulus: Measured according to ASTM D790 using Shimadzu Autograph AGS-10KND under conditions of a bending speed of 3 mm / min, a measurement temperature of 23 ° C., and a humidity of 50%.
(4) Volume resistivity: compliant with JISK6911 (test plate: 80 × 80 × 3 mm).
(5) Molding appearance: Evaluated visually.
(6) Flame retardancy: compliant with UL94 combustion test (test piece thickness: 1.5 mm).

From Tables 1 and 2, in the examples, the impact resistance, electrical conductivity (antistatic) property, flame retardancy and molded appearance are excellent, and when using a masterbatch, impact resistance, electrical conductivity (antistatic) property, flexural modulus It can be seen that is further improved.
On the other hand, it can be seen that the PC resin alone (Comparative Example 1) has no conductivity (antistatic property), low fluidity and rigidity. When only the carbon nanotube is added to the PC resin, there is no improvement in conductivity (antistatic property), fluidity, and flame retardancy, the impact resistance is low, and the molded appearance is silver (Comparative Example 2).
It can be seen that ABS and PET to which only carbon nanotubes are added have no improvement in conductivity (antistatic property), fluidity, and flame retardancy, and the molded appearance is silver (Comparative Examples 4 and 5).
In PPS and PPO to which only carbon nanotubes are added, there is no improvement in conductivity (antistatic property) and fluidity, and the molding appearance is silver (Comparative Examples 6 and 7).
Further, if carbon nanotubes are not added by blending a PC resin and a terpene compound (Comparative Example 3), not only the conductivity (antistatic property) and flame retardancy are inferior, but also the impact resistance is extremely low, and the molded product. It can be seen that delamination occurs.

The thermoplastic resin composition of the present invention provides a uniform phase structure of a thermoplastic resin, a terpene compound, and a carbon nanomaterial, so there is no delamination, conductivity (antistatic), fluidity, flame retardancy, It can be set as the molded object excellent in impact resistance, bending resistance, a shaping | molding external appearance, etc.
Therefore, it is a housing or part of electrical / electronic equipment such as OA equipment, information / communication equipment, automobile parts or household electrical appliances, and further automobile parts, etc., which is difficult with PC resin, ABS resin composition, and PET resin composition. With a flame retardancy of about V-2, PPS resin compositions and PPO resin compositions are expected to expand applications in fields where flame retardancy is required to be V-0.

Claims (7)

(A) 80 to 99% by mass of an aromatic polycarbonate resin and (B) 100 parts by mass of a resin component consisting of 20 to 1% by mass of a terpene compound, (C) 0.1 to 30 parts by mass of a carbon nanomaterial is blended. A thermoplastic resin composition. The thermoplastic resin composition according to claim 1, wherein the component (B) is at least one selected from terpene resins, hydrogenated terpene resins, terpene-phenol resins, and terpene-bisphenol A resins. The thermoplastic resin composition according to claim 1 or 2, wherein the component (A) has a viscosity average molecular weight of 10,000 to 40,000.   The thermoplastic resin composition according to any one of claims 1 to 3, wherein the component (C) is one or more carbon nanomaterials selected from carbon nanotubes, carbon nanohorns, fullerenes, and carbyne materials.   The thermoplastic resin composition according to claim 4, wherein the content of the amorphous carbon particles contained in the carbon nanotube is 20% by mass or less, the outer diameter of the carbon nanotube is 0.5 to 120 nm, and the length is 500 nm or more. object.   The thermoplastic resin according to any one of claims 1 to 5, wherein the component (B) is added to the component (B) and kneaded, and then the component (A) is added to the kneaded product, followed by melt kneading. A method for producing a resin composition.   The molded object obtained using the thermoplastic resin composition in any one of Claims 1-6.