Acrylic resin composition and molded article

Abstract

To provide an acrylic resin composition easily improving mechanical performance of a molding and also easily enhancing flame retardancy.SOLUTION: An acrylic resin composition includes a thermoplastic resin (A), a halogen-based flame retarder (B), and an inorganic compound (C). The thermoplastic resin (A) includes a polymethyl methacrylate resin (A1), and a polycarbonate resin (A2). The mass ratio of the polycarbonate resin (A2) to the total amount of the polymethyl methacrylate resin (A1) and the polycarbonate resin (A2) is 20-50 mass%. A halogen content in the halogen-based flame retarder (B) is 7-21 pts.mass to 100 pts.mass of the thermoplastic resin (A).SELECTED DRAWING: None

Description

Technical Field

[0001] The present disclosure relates to an acrylic resin composition and a molded body, and more particularly to an acrylic resin composition having flame retardancy and a molded body including a molded product of the acrylic resin composition.

Background Art

[0002] In Patent Document 1, for example, a (meth)acrylic resin composition containing a (meth)acrylic polymer (P), a halogen-containing phosphorus-based flame retardant (C), an inorganic pigment (D), and a halogen-free phosphate ester (E) is disclosed. In this acrylic resin composition, the content of the halogen-containing phosphorus-based flame retardant (C) is 5.0 parts by mass or more and 35 parts by mass or less with respect to 100 parts by mass of the (meth)acrylic polymer (P), and the content of the halogen-free phosphate ester (E) is 0.005 parts by mass or more and 0.15 parts by mass or less with respect to 100 parts by mass of the (meth)acrylic polymer (P) are disclosed. It is disclosed that this acrylic resin composition can be used as a signboard or lighting material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the acrylic resin composition of Patent Document 1, although improvement in flame retardancy can be expected, there is a problem that mechanical properties such as the mechanical strength and hardness of the molded body are likely to decrease.

[0005] An object of the present disclosure is to provide an acrylic resin composition and a molded body that are likely to improve the mechanical properties of the molded body and are likely to enhance flame retardancy.

Means for Solving the Problems

[0006] An acrylic resin composition according to one aspect of the present disclosure contains a thermoplastic resin (A), a halogenated flame retardant (B), and an inorganic compound (C). The thermoplastic resin (A) comprises a polymethyl methacrylate resin (A1) and a polycarbonate resin (A2). The mass ratio of the polycarbonate resin (A2) to the total amount of the polymethyl methacrylate resin (A1) and the polycarbonate resin (A2) is 20% by mass or more and 50% by mass or less. The halogen content in the halogenated flame retardant (B) is 7 parts by mass or more and 21 parts by mass or less per 100 parts by mass of the thermoplastic resin (A).

[0007] A molded article according to one aspect of the present disclosure includes a molded article of the acrylic resin composition. [Effects of the Invention]

[0008] According to this disclosure, there are advantages such as being able to easily improve the mechanical performance of the molded product and easily enhance its flame retardancy. [Modes for carrying out the invention]

[0009] 1. Overview An embodiment of this disclosure is described below. Note that the following embodiment is only one of many embodiments of this disclosure. The following embodiment can be modified in various ways depending on the design, as long as the objectives of this disclosure are achieved.

[0010] The acrylic resin composition of this embodiment contains a thermoplastic resin (A), a halogenated flame retardant (B), and an inorganic compound (C). The thermoplastic resin (A) includes a polymethyl methacrylate resin (A1) and a polycarbonate resin (A2). The mass ratio of the polycarbonate resin (A2) to the total amount of the polymethyl methacrylate resin (A1) and the polycarbonate resin (A2) is 20% by mass or more and 50% by mass or less. The halogen content in the halogenated flame retardant (B) per 100 parts by mass of the thermoplastic resin (A) is 7 parts by mass or more and 21 parts by mass or less. As a result, the acrylic resin composition of this embodiment is more likely to improve the mechanical properties of molded products, such as bending strength and pencil hardness, and to enhance flame retardancy.

[0011] The reason why the acrylic resin composition of this embodiment can achieve the above properties is not precisely clear, but it is presumed to be due to the following reasons. However, this embodiment is not bound by the explanation of the following reasons.

[0012] In other words, by having the thermoplastic resin (A) in the acrylic resin composition contain polymethyl methacrylate resin (A1) and polycarbonate resin (A2), and by setting the mass ratio of polycarbonate resin (A2) to the total amount of polymethyl methacrylate resin (A1) and polycarbonate resin (A2) to be 20% by mass or more and 50% by mass or less, high mechanical performance and excellent flame retardancy can be imparted to molded articles made from the acrylic resin composition. Furthermore, by having the acrylic resin composition contain a halogen-based flame retardant (B), and setting the halogen content in the halogen-based flame retardant (B) to be 7 parts by mass or more and 21 parts by mass or less per 100 parts by mass of thermoplastic resin (A), high flame retardancy can be imparted to molded articles made from the acrylic resin composition. In particular, in this embodiment, it is considered that even though the acrylic resin composition contains a flame retardant, by adjusting the halogen content in the halogen-based flame retardant (B), it is possible to impart high flame retardancy while maintaining the high mechanical performance provided by the thermoplastic resin (A).

[0013] As described above, the acrylic resin composition of this embodiment can impart high mechanical performance and high flame retardancy to its molded articles, and therefore can be suitably used to produce molded articles with excellent physical properties.

[0014] 2.Details The acrylic resin composition and molded articles according to this embodiment will be described in more detail below. In this disclosure, the expression "A and / or B" means either "A", "B", or "A and B". Also, in this disclosure, "(meth)acrylic" means at least one of "acrylic" and "methacrylic". For example, (meth)acrylate means at least one of acrylate and methacrylate.

[0015] (1) Acrylic resin composition The acrylic resin composition of this embodiment contains a thermoplastic resin (A), a halogenated flame retardant (B), and an inorganic compound (C) as described above. The components that the acrylic resin composition may contain are described below.

[0016] [Thermoplastic resin] The thermoplastic resin (A) can impart moldability to the acrylic resin composition. In this embodiment, the thermoplastic resin (A) includes a polymethyl methacrylate resin (A1) and a polycarbonate resin (A2). In this disclosure, "polymethyl methacrylate resin" may also be referred to as "PMMA resin" and "polycarbonate resin" may be referred to as "PC resin". PMMA is an abbreviation for PolyMethylMethacrylate, and PC is an abbreviation for PolyCarbonate.

[0017] The inclusion of PMMA resin (A1) in the thermoplastic resin (A) makes it easier to impart transparency and chemical resistance to molded articles of the acrylic resin composition. In this embodiment, the content ratio of PMMA resin (A1) to the total thermoplastic resin (A) is preferably 50% by mass or more. In this case, the molded article made from the acrylic resin composition can be given better transparency and chemical resistance, and its mechanical strength can also be increased. The content ratio of PMMA resin (A1) to the total thermoplastic resin (A) is more preferably 60% by mass or more, and even more preferably 67% by mass or more. The main component in thermoplastic resin (A) refers to the component that is present in the largest amount among the multiple components contained in thermoplastic resin (A).

[0018] Furthermore, in this embodiment, the inclusion of PC resin (A2) in the thermoplastic resin (A) contributes to further improving the mechanical strength of the molded article of the acrylic resin composition. Conventionally, in resin compositions containing PMMA resin, in order to impart flame retardancy to the molded article by incorporating a flame retardant, the proportion of the flame retardant had to be increased, which sometimes resulted in the deterioration of physical properties derived from PMMA (e.g., transparency, chemical resistance, strength, etc.). In contrast, in this embodiment, by including PC resin (A2) in the acrylic resin composition, flame retardancy can be enhanced even with a relatively small proportion of flame retardant, and the physical properties such as transparency and chemical resistance of the molded article of the acrylic resin composition can be less likely to be deteriorated, and the mechanical performance can be further improved.

[0019] In this embodiment, the mass ratio of PC resin (A2) to the total amount of PMMA resin (A1) in the acrylic resin composition is 20% by mass or more and 50% by mass or less. As a result, the acrylic resin composition of this embodiment can maintain high mechanical performance and flame retardancy of the molded product. The mass ratio of PC resin (A2) to the total amount of PMMA resin (A1) is more preferably 25% by mass or more and 45% by mass or less, and even more preferably 30% by mass or more and 40% by mass or less.

[0020] The thermoplastic resin (A) may contain thermoplastic components other than the above PMMA resin (A1) and PC resin (A2). Examples of the thermoplastic components other than the PMMA resin (A1) and PC resin (A2) include polyester resins, polyethylene resins, polypropylene resins, polystyrene resins, and the like. The content ratio of the thermoplastic components other than the PMMA resin (A1) and PC resin (A2) in the thermoplastic resin (A) is, for example, 1% by mass or more and 10% by mass or less.

[0021] [Halogen-based flame retardant] The halogen-based flame retardant (B) can impart flame retardancy to the acrylic resin composition and its molded product. In this embodiment, the halogen content in the halogen-based flame retardant (B) is 7 parts by mass or more and 21 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin (A). Therefore, the acrylic resin composition has high flame retardancy and can maintain it. It is more preferable that the halogen content of the halogen-based flame retardant (B) is 10 parts by mass or more and 20 parts by mass or less, and even more preferable that it is 13 parts by mass or more and 17 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin (A). In the present disclosure, "the halogen content in the halogen-based flame retardant (B) with respect to 100 parts by mass of the thermoplastic resin (A)" is the percentage of the value obtained by multiplying the total content of the halogen-based flame retardant (B) by the halogen content rate in the halogen-based flame retardant (B) and the mass of the thermoplastic resin (A).

[0022] The halogen-based flame retardant (B) preferably has one or more halogen atoms and a bisphenol skeleton in the molecule. In this case, it is easy to impart flame retardancy to the molded product made from the acrylic resin composition.

[0023] Specific examples of the halogen-based flame retardant (B) include tetrabromobisphenol A (TBBPA), derivatives of TBBPA, hexabromocyclododecane, and the like. However, the halogen-based flame retardant (B) is not limited to the above components.

[0024] Further, the acrylic resin composition may contain flame retardant components other than the halogen-based flame retardant (B) as long as it does not deviate from the object of the present disclosure. Examples of the flame retardant components other than the halogen-based flame retardant (B) include phosphorus-containing flame retardants, phosphorus-free flame retardants, and the like.

[0025] [Inorganic compound] The inorganic compound (C) can further improve the effect of imparting flame retardancy to the acrylic resin composition and its molded product by the halogen-based flame retardant (B).

[0026] The inorganic compound (C) preferably contains either one or both of antimony trioxide and zinc stannate. The total amount of antimony trioxide and zinc stannate with respect to 100 parts by mass of the thermoplastic resin (A) is preferably 0.1 part by mass or more and 15 parts by mass or less. In this case, higher flame retardancy can be imparted to the molded product of the acrylic resin composition. In the present disclosure, antimony trioxide and zinc stannate included in the inorganic compound (C) function as flame retardant aids. Further, the inorganic compound (C) may contain flame retardant aids other than antimony trioxide and zinc stannate.

[0027] The inorganic compound (C) preferably further contains an inorganic filler (C1). In this case, it is easy to improve the dispersibility of the acrylic resin composition. Thereby, it is easy to improve the moldability when molding the acrylic resin composition. Further, dripping during combustion is less likely to occur, and the flame retardancy can be enhanced. In the present disclosure, antimony trioxide and zinc stannate are distinguished from the inorganic filler (C1), that is, they are not included in the inorganic filler (C1).

[0028] When the inorganic compound (C) contains an inorganic filler (C1), the shape of the inorganic filler (C1) may be particulate or fibrous. That is, it is preferable that the inorganic filler (C1) contains at least one of inorganic fibers (C11) and inorganic particles (C12). The inorganic fibers (C11) preferably have a fiber length of 6 μm or more and 200 μm or less, and a fiber diameter of 6 μm or more and 13 μm or less. It is also preferable that the inorganic particles (C12) have an average particle diameter of 6 μm or more and 13 μm or less. In this case, the fluidity of the acrylic resin composition is easily improved. This makes it easier to improve the moldability when molding the acrylic resin composition. It is more preferable that the inorganic fibers (C11) have a fiber length of 30 μm or more and 150 μm or less, and a fiber diameter of 7 μm or more and 12 μm or less, and it is even more preferable that they have a fiber length of 50 μm or more and 100 μm or less, and a fiber diameter of 7 μm or more and 10 μm or less. Furthermore, the average particle size of inorganic particles (C12) is the cumulative 50% diameter (median diameter D50) calculated from the particle size distribution measured by dynamic light scattering.

[0029] The inorganic filler (C1) preferably contains a hydrate. In this case, when a molded product made from the acrylic resin composition is burned, the water derived from the hydrate in the molded product undergoes dehydration, causing an endothermic reaction and a cooling effect. Furthermore, the water produced by dehydration easily dilutes the combustion gas in the gas phase during combustion. This makes it easier to further improve the flame retardancy of the molded product made from the acrylic resin composition. Note that "hydrate" refers to a compound formed by the bonding of one or more water molecules.

[0030] The inorganic filler (C1) may include at least one selected from the group consisting of, for example, wollastonite, glass fiber, magnesium hydroxide, calcium hydroxide, and aluminum hydroxide. While the specific components of the inorganic filler (C1) are not limited to those described above, the inclusion of wollastonite in the inorganic filler (C1) is preferable because it particularly reduces drip generation during combustion of the molded body, thus easily imparting high flame retardancy.

[0031] The amount of inorganic filler (C1) per 100 parts by mass of thermoplastic resin (A) is preferably 0.1 parts by mass or more and 15 parts by mass or less. In this case, even higher flame retardancy can be imparted to the molded article of the acrylic resin composition. The amount of inorganic filler (C1) per 100 parts by mass of thermoplastic resin (A) is more preferably 1 part by mass or more and 13 parts by mass or less, and even more preferably 3 parts by mass and 10 parts by mass or less.

[0032] [Other ingredients] The acrylic resin composition of this embodiment may contain additives other than those described above, such as colorants and mold release agents, as long as they do not impair the effects of the present disclosure.

[0033] The acrylic resin composition of this embodiment can be prepared, for example, as follows.

[0034] In other words, the acrylic resin composition is obtained by mixing PMMA resin (A1) and PC resin (A2), which are components that can be included in the thermoplastic resin (A), a halogenated flame retardant (B), an inorganic compound (C), and appropriate additives.

[0035] The lower limit of the melt mass flow rate (MFR) of the acrylic resin composition is preferably 1 g / 10 min. In this case, the acrylic resin composition may have high moldability. Therefore, it is easy to mold when producing molded products from the acrylic resin composition. The lower limit of the MFR of the acrylic resin composition is more preferably 3 g / 10 min, and even more preferably 4 g / 10 min or higher. The MFR of the acrylic resin composition can be measured by the method described in the examples below.

[0036] As described above, the acrylic resin composition of this embodiment can impart high flame retardancy and high mechanical performance to its molded products. Furthermore, the acrylic resin composition also exhibits excellent chemical resistance and gloss. For this reason, the acrylic resin composition of this embodiment is particularly suitable for use as a resin molding material for wet areas. For example, applications in wet areas include furniture components and building materials such as washbasin counters, kitchen counters, bathtubs, washbasins, and toilets, and these can be manufactured by molding products using the acrylic resin composition as a resin molding material.

[0037] Next, the molded body according to this embodiment will be described.

[0038] (2) Molded body The molded article of this embodiment includes a molded article of the acrylic resin composition described above. That is, the molded article is obtained by molding the acrylic resin composition. The method for producing the molded article is not particularly limited, and any suitable molding method can be used, but examples of various molding methods include injection molding and extrusion molding. Since the molded article is made from the above-mentioned acrylic resin composition, it has high flame retardancy and high mechanical performance.

[0039] The characteristics of the molded product will be explained in detail.

[0040] The molded article is preferably one in which the lower limit of the oxygen index (OI), measured in accordance with JIS K7201-2, is 24 or higher. In this case, the molded article may have excellent flame retardancy. It is more preferable if the lower limit of the oxygen index (OI) of the molded article is 26 or higher.

[0041] The molded article is preferably one in which the lower limit of its bending strength, as measured in accordance with ASTM D790, is 100 MPa or higher. In this case, the molded article may have high mechanical strength. It is more preferable if the lower limit of the bending strength of the molded article is greater than 110 MPa.

[0042] The molded article is preferably one with a pencil hardness of 2H or higher, as measured in accordance with ASTM D3365. In this case, the molded article may have high hardness. [Examples]

[0043] The present disclosure will be described in detail below with reference to examples. However, the present disclosure is not limited to the following examples.

[0044] (1) Preparation of resin composition In each example and comparative example, the components shown in the table were mixed in the proportions shown in the table. The details of the components shown in the table are as follows. In the table, "halogen content relative to thermoplastic resin" refers to the halogen content in the halogen-based flame retardant per 100 parts by mass of thermoplastic resin. (thermoplastic resin) • PMMA resin: Polymethacrylate resin (manufactured by Mitsubishi Chemical Corporation, part number VH001). • PC resin: Polycarbonate resin (manufactured by Mitsubishi Engineering Plastics Corporation, part number S2000). (Halogenated flame retardant) • TBBPA: Tetrabromobisphenol A type epoxy resin (manufactured by Sakamoto Pharmaceutical Co., Ltd.; halogen content: 52%) (Inorganic compound) • Flame retardant additive: Antimony trioxide (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) • Inorganic filler 1: Wollastonite (manufactured by Tomoe Kogyo Co., Ltd., product number NYGLOS 4W. Fiber length 63 μm, fiber diameter 7 μm. Aspect ratio 9) • Inorganic filler 2: Wollastonite (manufactured by Tomoe Engineering Co., Ltd., product name NYGLOS 8. Fiber length 156 μm, fiber diameter 12 μm. Aspect ratio 13) • Inorganic filler 3: Wollastonite (manufactured by Tomoe Engineering Co., Ltd., product name NYAD-G. Fiber length 825 μm, fiber diameter 55 μm. Aspect ratio 15) • Inorganic filler 4: Magnesium hydroxide (manufactured by Kamishima Chemical Industry Co., Ltd., product number S6. Average particle size 1.0 μm.) • Inorganic filler 5: Magnesium hydroxide (manufactured by Kamishima Chemical Industry Co., Ltd., product number EP50. Average particle size 6.0 μm.) • Inorganic filler 6: Glass fiber (manufactured by Central Glass Fiber Co., Ltd., product number EPH150-31. Fiber length 150 μm, fiber diameter 11 μm.)

[0045] (2) Fabrication of molded products The resin composition prepared in (1) above was injected into a mold and molded to produce a molded product, and the resulting molded product was used as a molded body for evaluation testing.

[0046] (3) Evaluation (3-1) Liquidity (measurement of MFR) The melt mass flow rate (MFR) was measured for each example and comparative example resin composition prepared in (1) above. The measurement was performed in accordance with ISO 1133, under conditions of a temperature of 230°C and a weight of 37.3 N. Based on the results obtained from the measurement, the following criteria were used for evaluation. A: MFR is greater than 3g / 10min. B: MFR is between 1g / 10min and 3g / 10min. C:MFR is less than 1g / 10min.

[0047] (3-2) Formability (3-2-1) Exterior The molded articles of each example and comparative example prepared in (1) above were visually inspected and evaluated according to the following criteria. A: No inorganic fillers are observed on the surface of the molded product. B: A small amount of inorganic filler is observed on the surface of the molded product. C: Numerous inorganic fillers are clearly observed on the surface of the molded body.

[0048] (3-2-2) Glossy The degree of gloss of each example and comparative example molded article prepared in (1) above was visually confirmed and sensory evaluation was performed according to the following criteria. A: The mold transfer is good and it has a glossy finish. B: The mold transfer is somewhat insufficient, but it has good image quality. C: The mold transfer is insufficient, resulting in poor image quality.

[0049] (3-3) Flame retardant For each of the examples and comparative examples prepared in (2) above, test specimens were cut out in accordance with JIS K7201-2 to be 100 mm long, 10 mm wide, and 4 mm thick. The oxygen index (OI value) was measured, and the flame retardancy was evaluated according to the following criteria. A: The oxygen index is 26 or higher. B: The oxygen index is between 24 and 26. C: The oxygen index is below 24, or dripping occurs.

[0050] (3-4) Pencil hardness (mechanical performance) The pencil hardness of the test molded articles for each example and comparative example prepared in (2) above was measured in accordance with ASTM D3365. The obtained results were evaluated based on the following criteria. A: The hardness is 2H or higher. C: Hardness is H or lower.

[0051] (3-5) Bending strength (mechanical performance) The molded test articles of each example and comparative example prepared in (2) above were measured for bending strength in accordance with ASTM D790 and evaluated according to the following criteria. A: The bending strength is over 110 MPa. B: The bending strength is between 100 MPa and 110 MPa. C: The bending strength is less than 100 MPa.

[0052] [Table 1]

[0053] [Table 2]

[0054] 3. Summary As will be clear from the above embodiments and examples, this disclosure includes the following aspects.

[0055] The acrylic resin composition according to the first embodiment contains a thermoplastic resin (A), a halogenated flame retardant (B), and an inorganic compound (C). The thermoplastic resin (A) comprises a polymethyl methacrylate resin (A1) and a polycarbonate resin (A2). The mass ratio of the polycarbonate resin (A2) to the total amount of the polymethyl methacrylate resin (A1) and the polycarbonate resin (A2) is 20% by mass or more and 50% by mass or less. The halogen content in the halogenated flame retardant (B) is 7 parts by mass or more and 21 parts by mass or less per 100 parts by mass of the thermoplastic resin (A).

[0056] According to the first embodiment, it is easier to improve the mechanical performance of the molded product and to enhance its flame retardancy.

[0057] In the second embodiment, the acrylic resin composition, in the first embodiment, comprises one or both of the inorganic compound (C) diantimony trioxide and zinc stainate. The total amount of diantimony trioxide and zinc stainate per 100 parts by mass of the thermoplastic resin (A) is 0.1 parts by mass or more and 15 parts by mass or less.

[0058] According to the second embodiment, even higher flame retardancy can be imparted to molded articles of acrylic resin compositions.

[0059] The acrylic resin composition of the third embodiment, in the first or second embodiment, further comprises an inorganic filler (C1) other than antimony trioxide and zinc stannate in the inorganic compound (C). The inorganic filler (C1) comprises at least one of an inorganic fiber (C11) having a fiber length of 6 μm or more and 200 μm or less and a fiber diameter of 6 μm or more and 13 μm or less, and an inorganic particle (C12) having an average particle diameter of 6 μm or more and 13 μm or less.

[0060] According to the third embodiment, the fluidity of the acrylic resin composition is easily improved. This makes it easier to improve the moldability when molding the acrylic resin composition. In addition, dripping during combustion is less likely to occur, making it easier to improve flame retardancy.

[0061] In the fourth embodiment, the acrylic resin composition, in the third embodiment, contains a hydrate of the inorganic filler (C1).

[0062] According to the fourth aspect, the flame retardancy of molded articles made from acrylic resin compositions can be more easily improved.

[0063] In the fifth embodiment of the acrylic resin composition, in the third or fourth embodiment, the ratio of the inorganic filler (C1) to 100 parts by mass of the thermoplastic resin (A) is 0.1 parts by mass or more and 15 parts by mass or less.

[0064] According to the fifth embodiment, even higher flame retardancy can be imparted to molded articles of acrylic resin compositions.

[0065] The molded article according to the sixth embodiment is a molded article of an acrylic resin composition according to any one of the first to fifth embodiments.

[0066] According to the sixth embodiment, the material has excellent mechanical properties and flame retardancy and can be particularly suitable for use as a resin molded product for use in wet areas.

Claims

1. Thermoplastic resin (A), Halogen-based flame retardant (B), It contains an inorganic compound (C) and The thermoplastic resin (A) consists only of polymethyl methacrylate resin (A1) and polycarbonate resin (A2). The mass ratio of the polycarbonate resin (A2) to the total amount of the polymethyl methacrylate resin (A1) and the polycarbonate resin (A2) is 20% by mass or more and 50% by mass or less. The halogen content in the halogen-based flame retardant (B) is 7 parts by mass or more and 21 parts by mass or less per 100 parts by mass of the thermoplastic resin (A), The inorganic compound (C) comprises an inorganic filler (C1) other than antimony trioxide and zinc stannate. The inorganic filler (C1) comprises at least one of inorganic fibers (C11) having a fiber length of 6 μm or more and 200 μm or less and a fiber diameter of 6 μm or more and 13 μm or less, and inorganic particles (C12) having an average particle diameter of 6 μm or more and 13 μm or less. The inorganic fiber (C11) contains wollastonite, The ratio of the inorganic filler (C1) to 100 parts by mass of the thermoplastic resin (A) is 0.1 parts by mass or more and 15 parts by mass or less. The meltmass flow rate is 1 g / 10 min or more. Acrylic resin composition.

2. The inorganic compound (C) comprises one or both of antimony trioxide and zinc stainate. The total amount of antimony trioxide and zinc stainate per 100 parts by mass of the thermoplastic resin (A) is 0.1 parts by mass or more and 15 parts by mass or less. The acrylic resin composition according to claim 1.

3. The inorganic filler (C1) contains a hydrate, The acrylic resin composition according to claim 1 or 2.

4. A molded article of the acrylic resin composition according to any one of claims 1 to 3, Molded body.

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