Flame retardant composition, flame-retardant resin composition, and molded article

Abstract

The flame retardant composition according to the present invention comprises: one or more components selected from a melamine salt (A) selected from melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate; and one or more components selected from a piperazine salt (B) selected from piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate. And one or more dialkylphosphonate compounds (C) represented by general formula (1), the content of component (C) being 0.2-39 parts by mass (inclusive) per 100 parts by mass of the total content of component (A), component (B), and component (C).

Description

Technical Field

[0001] The present invention relates to a flame retardant composition, a flame retardant resin composition containing the flame retardant composition, and a molded article thereof. Background Art

[0002] Heretofore, various techniques for rendering resin materials flame retardant have been developed. As such a technique, a method of incorporating a phosphorus-based flame retardant into a resin material is known, and attempts have been made to use a combination of a phosphate compound and diethylphosphonate.

[0003] For example, Patent Document 1 proposes using diethylphosphonate as a fire retardant incorporated into an adhesive and a sealing material, and further using a phosphate compound as a synergistic agent. As specific combinations thereof, examples of using a combination of diethylphosphonate and melamine polyphosphate (Examples 17 and 21) and examples of using a combination of diethylphosphonate and piperazine pyrophosphate (Example 20) are described. However, examples of using a combination of the three components of diethylphosphonate, melamine polyphosphate, and piperazine pyrophosphate are not described.

[0004] Patent Document 2 proposes a thermoplastic resin composition containing an organic acid salt (D-1) / inorganic acid salt-based flame retardant containing a cyclic amine compound and a metal phosphonate-based flame retardant (D-2) in polylactic acid, and describes examples of a resin composition containing a piperazine phosphate-based flame retardant and an aluminum phosphonate, or examples of a resin composition containing a melamine pyrophosphate-based flame retardant and an aluminum phosphonate (Tables 1 and 2). However, examples of using a combination of the three components of a piperazine phosphate-based flame retardant, a melamine pyrophosphate-based flame retardant, and an aluminum phosphonate are not described.

[0005] It should be noted that dialkylphosphonates are known to impart flame retardancy to resins, but they reduce the fluidity of the resins (Patent Documents 3 and 4). Specifically, Patent Document 3 describes that dialkylphosphonates themselves have poor fluidity (paragraph 0006), and Patent Document 4 describes that various processing problems such as low fluidity, more difficult moldability, and longer injection molding time are caused by using dialkylphosphonates (paragraph 0006).

[0006] Prior Art Documents

[0007] Patent Documents

[0008] Patent Document 1: JP-A-2008-291217

[0009] Patent Document 2: JP-A-2014-098125

[0010] Patent Document 3: JP-A-2014-198778

[0011] Patent Document 4: Japanese Patent Application Laid-Open No. 2019-526673 Summary of the Invention

[0012] Technical Problem to be Solved by the Invention

[0013] However, the present inventors have conducted research and found that there is room for improvement in the flame retardancy of the flame retardant technologies described in Patent Documents 1 and 2 above.

[0014] Conventionally, the UL-94V test has been used to evaluate the superiority or inferiority of the flame retardancy of resin raw materials.

[0015] However, even resin raw materials that have reached the highest grade, i.e., the V-0 grade, in the UL-94V test sometimes produce flaming drips in other flame retardancy tests.

[0016] For example, in applications such as interior materials for transportation machinery such as automobiles, ships, airplanes, and railway vehicles, and interior materials for buildings, from the viewpoint of preventing the spread of fire, it is required that the molten resin raw materials do not drip (fall).

[0017] Therefore, the present inventors have conducted research with the aim of further improving the flame retardancy for preventing the spread of fire in conventional flame retardants.

[0018] Technical Solution for Solving the Technical Problem

[0019] In the flame retardant technologies described in Patent Documents 1 and 2 above, examples of using dialkyl phosphonates and melamine phosphate, and examples of using dialkyl phosphonates and piperazine phosphate are described.

[0020] However, examples of using the three components of dialkyl phosphonates, melamine phosphate, and piperazine phosphate are not described in Patent Documents 1 and 2 above, and have not been sufficiently studied so far.

[0021] Furthermore, the present inventors have found the following phenomenon in the above research: compared with the case of using only the two components of melamine phosphate and piperazine phosphate, when dialkyl phosphonate is used in combination with the two components of melamine phosphate and piperazine phosphate, the injection pressure during injection molding is reduced. This phenomenon indicates an improvement in the fluidity of the resin during molding processing. If the fluidity of the resin is improved, it is difficult to cause molding defects such as short mold and flow marks, and thus the processability is improved. The above-mentioned injection pressure reduction effect was completely unexpected. This is because Patent Documents 3 and 4 describe that dialkyl phosphonates reduce the fluidity of the resin.

[0022] Furthermore, the present inventors have found that by using three components, namely dialkyl phosphonate, melamine phosphate, and piperazine phosphate, as essential components and setting the content ratio of dialkyl phosphonate among the three components within a specified range, compared with the composition using two components, the grade in the UL-94V test is improved and the flame dripping prevention effect is excellent.

[0023] The detailed mechanism is still uncertain, but it is speculated that by using the three components in combination, the fluidity of the resin is improved, and thus the flame retardant effects brought by each of the three components can be fully obtained.

[0024] According to one aspect of the present invention, the following flame retardant compositions, flame retardant resin compositions, and molded articles are provided.

[0025] 1. A flame retardant composition comprising:

[0026] Component (A), which is one or more melamine salts selected from melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate,

[0027] Component (B), which is one or more piperazine salts selected from piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate, and

[0028] Component (C), which is one or more of the dialkyl phosphonate compounds represented by the following general formula (1),

[0029] [Chemical formula 1]

[0030]

[0031] In 100 parts by mass of the total content of Component (A), Component (B), and Component (C), the content of Component (C) is 0.2 parts by mass or more and 39 parts by mass or less.

[0032] (In the above general formula (1), R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms, M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H, or a protonated nitrogen base, and n represents an integer of 1 to 4.)

[0033] 2. The flame retardant composition according to 1., wherein in 100 parts by mass of the total content of Component (A), Component (B), and Component (C), the content of Component (C) is 2 parts by mass or more and 25 parts by mass or less.

[0034] 3. The flame retardant composition according to 1. or 2., wherein, in 100 parts by mass of the total content of the component (A) and the component (B), the content of the component (A) is 20 parts by mass or more and 60 parts by mass or less.

[0035] 4. The flame retardant composition according to any one of 1. to 3., wherein, in 100 parts by mass of the total content of the component (A) and the component (B), the content of the component (B) is 40 parts by mass or more and 80 parts by mass or less.

[0036] 5. The flame retardant composition according to any one of 1. to 4., wherein the flame retardant composition contains at least one of R in the general formula (1) 1 and R 2 each independently being any one of alkyl groups having 2 to 4 carbon atoms as the component (C).

[0037] 6. The flame retardant composition according to any one of 1. to 5., wherein the flame retardant composition contains at least one of the component (C) in which M in the general formula (1) is selected from one of Al, Fe, Zn, and Na.

[0038] 7. A flame retardant resin composition containing a thermoplastic resin and the flame retardant composition according to any one of 1. to 6.

[0039] 8. The flame retardant resin composition according to 7., wherein, relative to 100 parts by mass of the thermoplastic resin, the content of the flame retardant composition is 20 parts by mass or more and 70 parts by mass or less.

[0040] 9. The flame retardant resin composition according to 7. or 8., wherein the flame retardant resin composition contains glass fiber.

[0041] 10. A molded article formed using the flame retardant resin composition according to any one of 7. to 9.

[0042] Advantages of the Invention

[0043] According to the present invention, it is possible to provide a flame retardant composition having excellent flame retardancy when compounded with a resin, a flame retardant resin composition containing the flame retardant composition, and a molded article thereof. Detailed Embodiments

[0044] Hereinafter, embodiments of the present invention will be described.

[0045] The flame retardant composition of the present embodiment contains: one or more of the melamine salts (A) selected from melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate, one or more of the piperazine salts (B) selected from piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate, and one or more of the dialkyl phosphonate compounds (C) represented by the following general formula (1).

[0046] In addition, the flame retardant composition is configured such that in 100 parts by mass of the total content of the components (A), (B), and (C), the content of the component (C) satisfies 0.2 parts by mass or more and 39 parts by mass or less.

[0047] In this specification, polyphosphoric acid refers to a substance containing at least one condensed phosphoric acid having a condensation degree of 3 or more, and may also contain a mixture of two or more condensed phosphoric acids.

[0048] In addition, polyphosphate refers to a salt compound formed from polyphosphoric acid and a base. The salt compound may contain two or more different types of bases.

[0049] In addition, phosphoric acids refer to orthophosphoric acid, pyrophosphoric acid, polyphosphoric acid, or a mixture of two or more of them.

[0050] <Flame Retardant Composition>

[0051] The above-mentioned melamine salt (A) component is hereinafter simply referred to as (A) melamine salt or (A) component.

[0052] The (A) melamine salt is a salt of phosphoric acid and melamine. Specifically, the (A) melamine salt is selected from melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate, and one kind can be used alone, or two or more kinds can be used in combination.

[0053] Among them, as the (A) melamine salt, from the viewpoints of flame retardancy, processability, or storage stability, melamine pyrophosphate or melamine polyphosphate is preferred, and melamine pyrophosphate is more preferred. When the (A) melamine salt is a mixture of multiple melamine salts, the mixture preferably contains melamine pyrophosphate, and the higher the content ratio of melamine pyrophosphate, the more preferred.

[0054] The ratio of the phosphorus atom to melamine in the (A) melamine salt is not particularly limited. From the viewpoint of flame retardancy, it is preferably 0.5 to 2 moles of melamine per 1 mole of phosphorus atom, and more preferably 0.8 to 1.2 moles of melamine per 1 mole of phosphorus atom.

[0055] (A) The melamine salts can be obtained, for example, by reacting phosphoric acids or salts of phosphoric acids corresponding to component (A) with melamine. In addition, melamine pyrophosphate and melamine polyphosphate in (A) the melamine salts can also be obtained by heating and condensing melamine orthophosphate.

[0056] Examples of the salts of the above phosphoric acids include: sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, sodium phosphate, potassium phosphate, sodium pyrophosphate, potassium pyrophosphate, sodium polyphosphate, potassium polyphosphate, etc.

[0057] In addition, melamine pyrophosphate and melamine polyphosphate can also be obtained by heating and condensing melamine orthophosphate. As (A) the melamine salts, melamine pyrophosphate or melamine polyphosphate obtained by heating and condensing melamine orthophosphate is preferred, and melamine pyrophosphate is particularly preferred.

[0058] The above-mentioned piperazine salt component (B) is hereinafter simply referred to as (B) piperazine salt or component (B).

[0059] The (B) piperazine salt is a salt of a phosphoric acid and piperazine. Specifically, the (B) piperazine salt is selected from piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate, and one kind can be used alone or two or more kinds can be used in combination.

[0060] Among them, as the (B) piperazine salt, from the viewpoints of flame retardancy, operability, and storage stability, piperazine pyrophosphate or piperazine polyphosphate is preferred, and piperazine pyrophosphate is particularly preferred. When the (B) component is a mixture of multiple piperazine salts, it is preferred to contain piperazine pyrophosphate, and the higher the content ratio of piperazine pyrophosphate, the more preferred.

[0061] The ratio of the phosphorus atom to piperazine in the (B) piperazine salt is not particularly limited. From the viewpoint of flame retardancy, it is preferred that the piperazine is 0.5 to 2 moles relative to 2 moles of phosphorus atoms, and more preferably the piperazine is 0.8 to 1.2 moles relative to 2 moles of phosphorus atoms.

[0062] The (B) piperazine salt can be obtained by reacting phosphoric acids or salts of phosphoric acids corresponding to component (B) with piperazine. As the salts of the above phosphoric acids, the salts described above can be used.

[0063] In addition, piperazine pyrophosphate and piperazine polyphosphate can be obtained by heating and condensing piperazine orthophosphate. As the (B) piperazine salt, piperazine pyrophosphate or piperazine polyphosphate obtained by heating and condensing piperazine orthophosphate is preferred, and piperazine pyrophosphate is particularly preferred.

[0064] The dialkyl phosphonate compound component (C) is hereinafter simply referred to as component (C).

[0065] Component (C) is a dialkyl phosphonate compound represented by the following general formula (1).

[0066] [Chemical 2]

[0067]

[0068] In the above general formula (1), R 1 and R 2 each independently represents an alkyl group having 1 to 6 carbon atoms, M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H or a protonated nitrogen base, and n represents an integer of 1 to 4.

[0069] As R 1 and R 2 in the above general formula (1), examples of the alkyl group having 1 to 6 carbon atoms that can be used include linear or branched alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, isohexyl, tert-hexyl, heptyl, etc. Among these alkyl groups, from the viewpoint of flame retardancy, alkyl groups having 1 to 4 carbon atoms are preferred, ethyl, butyl, and tert-butyl are more preferred, and ethyl is further more preferred.

[0070] The component (C) may contain at least one compound in which each of R 1 and R 2 is independently any one of alkyl groups having 2 to 4 carbon atoms.

[0071] As M in the above general formula (1), from the viewpoints of flame retardancy and processability, 1 or more selected from Mg, Ca, Al, Fe, Zn, Na, and K are preferred, 1 or more selected from Al, Fe, Zn, and Na are more preferred, 1 or more selected from Al and Na are further more preferred, and Al is particularly preferred.

[0072] As the component (C), one compound can be used alone, or two or more compounds having different R 1 , R 2 , and M in the general formula (1) can be used in combination. Specifically, the component (C) may contain at least one compound in which M in the above general formula (1) is one selected from Al, Fe, Zn, and Na.

[0073] As a production method of the component (C), known methods can be cited. For example, the production methods of dialkyl phosphonates are disclosed in Japanese Patent Application Laid-Open No. 2001-525327, Japanese Patent Application Laid-Open No. 2005-179362, etc.

[0074] In the flame retardant composition of the present embodiment, from the viewpoints of flame retardancy and processability, in 100 parts by mass in total of the components (A), (B), and (C), the lower limit of the content of the component (C) is 0.2 part by mass or more, preferably 1 part by mass or more, more preferably 2 parts by mass or more, and still more preferably 3 parts by mass or more.

[0075] On the other hand, from the viewpoint of flame retardancy, in 100 parts by mass in total of the components (A), (B), and (C), the upper limit of the content of the component (C) is 39 parts by mass or less, preferably 30 parts by mass or less, more preferably 25 parts by mass or less, and still more preferably 20 parts by mass or less.

[0076] In other embodiments, from the viewpoints of higher flame retardancy and processability, in 100 parts by mass in total of the components (A), (B), and (C), the content of the component (C) may be 2 parts by mass or more and 25 parts by mass or less.

[0077] In addition, in another embodiment, in the flame retardant composition of the present embodiment, from the viewpoint of higher flame retardancy, in 100 parts by mass in total of the components (A) and (B), the content of the component (A) is, for example, 20 parts by mass or more and 60 parts by mass or less, preferably 30 parts by mass or more and 50 parts by mass or less, and more preferably 35 parts by mass or more and 45 parts by mass or less.

[0078] In addition, in another embodiment, in the flame retardant composition of the present embodiment, from the viewpoint of higher flame retardancy, in 100 parts by mass in total of the components (A) and (B), the content of the component (B) is, for example, 40 parts by mass or more and 80 parts by mass or less, preferably 50 parts by mass or more and 70 parts by mass or less, and more preferably 55 parts by mass or more and 65 parts by mass or less.

[0079] In addition, the flame retardant composition of the present embodiment may contain one or more kinds of flame retardant aids as the component (D). Thereby, the flame retardancy of the resin can be improved.

[0080] The above-mentioned flame retardant aids may include metal oxides and polyhydric alcohols.

[0081] Examples of the above-mentioned metal oxides include titanium oxide, zinc oxide, calcium oxide, magnesium oxide, zirconium oxide, barium oxide, tin dioxide, lead dioxide, antimony oxide, molybdenum oxide, cadmium oxide, etc. They can be used alone or in combination of two or more kinds. Thereby, the flame retardancy of the resin can be improved. In addition, agglomeration in the powdery or granular flame retardant composition can be suppressed. It should be noted that from the viewpoint of flame retardancy, zinc oxide is preferred.

[0082] The above-mentioned zinc oxide may be surface-treated or may not be surface-treated.

[0083] As the above zinc oxide, commercially available products can also be used, such as one kind of zinc oxide (manufactured by Mitsui Mining & Smelting Co., Ltd.), partially coated zinc oxide (manufactured by Mitsui Mining & Smelting Co., Ltd.), NANOFINE50 (ultrafine zinc oxide with an average particle size of 0.02 μm: manufactured by Sakai Chemical Industry Co., Ltd.), NANOFINE K (ultrafine zinc oxide coated with zinc silicate with an average particle size of 0.02 μm: manufactured by Sakai Chemical Industry Co., Ltd.), etc.

[0084] The above polyol is a compound having a plurality of hydroxyl groups bonded thereto. Examples thereof include pentaerythritol, dipentaerythritol, tripentaerythritol, polypentaerythritol, neopentyl glycol, trimethylolpropane, bis(trimethylol)propane, 1,3,5-tris(2-hydroxyethyl)isocyanurate, polyethylene glycol, glycerin, diglycerin, mannitol, maltitol, lactitol, sorbitol, erythritol, xylitol, xylose, sucrose, trehalose, inositol, fructose, maltose, lactose, etc. Among these polyols, one or more selected from pentaerythritol, dipentaerythritol, tripentaerythritol, and polypentaerythritol are preferred, dipentaerythritol, tripentaerythritol, and polypentaerythritol are more preferred, and dipentaerythritol is further more preferred. In addition, 1,3,5-tris(2-hydroxyethyl)isocyanurate and sorbitol can also be preferably used. They can be used alone or in combination of two or more.

[0085] When the flame retardant composition of the present embodiment contains the component (D), from the viewpoint of flame retardancy, the content of the component (D) is preferably, for example, 0.01 to 10 parts by mass, more preferably 0.5 to 8 parts by mass, and further more preferably 1 to 7 parts by mass, based on 100 parts by mass in total of the components (A) and (B).

[0086] In this specification, “~” means including the upper limit value and the lower limit value unless otherwise specified.

[0087] The flame retardant composition of the present embodiment may contain one or more kinds of anti-dripping agents. Thereby, dripping of the resin during combustion can be suppressed.

[0088] Examples of the above anti-dripping aids include layered silicates, fluorine-based anti-dripping aids, and silicone rubbers.

[0089] The above layered silicate is a layered silicate mineral, which can be natural or synthetic, and is not particularly limited.

[0090] Examples of the above layered silicate include montmorillonite, saponite, lithium montmorillonite, beidellite, clinoptilolite, nontronite and other smectite-based clay minerals, vermiculite, halloysite, swelling mica, talc, etc. They can be used alone or in combination of two or more.

[0091] From the viewpoint of anti-dripping, talc or steatite is preferred, and from the viewpoint of economy such as price, talc is particularly preferred.

[0092] The above-mentioned layered silicate may have cations between layers.

[0093] The above-mentioned cations may be metal ions, or a part or all of them may be cations other than metal ions such as organic cations, (quaternary) ammonium cations, and phosphonium cations.

[0094] Examples of the above-mentioned metal ions include sodium ions, potassium ions, calcium ions, magnesium ions, lithium ions, nickel ions, copper ions, zinc ions, etc.

[0095] Examples of the above-mentioned organic cations or quaternary ammonium cations include lauryltrimethylammonium cations, stearyltrimethylammonium cations, trioctylmethylammonium cations, distearyldimethylammonium cations, dihydrotallowdimethylammonium cations, distearyldibenzylammonium cations, etc. They can be used alone or in combination of two or more.

[0096] Specific examples of the above-mentioned fluorine-based anti-dripping aids include fluorine-based resins such as polytetrafluoroethylene, polyvinylidene fluoride, and polyhexafluoropropylene, and perfluoroalkane sulfonic acid alkali metal salt compounds or perfluoroalkane sulfonic acid alkaline earth metal salts such as sodium perfluoromethanesulfonate, potassium perfluorobutanesulfonate, potassium perfluorotert-butanesulfonate, sodium perfluorooctanesulfonate, and calcium perfluoro-2-ethylhexanesulfonate. Among them, from the viewpoint of anti-dripping properties, polytetrafluoroethylene is preferred. They can be used alone or in combination of two or more.

[0097] When the flame retardant composition of the present embodiment contains an anti-dripping agent, the content of the anti-dripping agent is preferably 0.01 to 5 parts by mass, more preferably 0.05 to 3 parts by mass, and still more preferably 0.1 to 1 part by mass, based on 100 parts by mass in total of the components (A) and (B). If it is less than 0.01 part by mass, the anti-dripping effect may sometimes be insufficient, and if it exceeds 5 parts by mass, the properties of the resin may sometimes be reduced.

[0098] The flame retardant composition of the present embodiment may contain a surface treatment agent.

[0099] Examples of the above-mentioned surface treatment agent include silicone oil, silane coupling agent, etc.

[0100] By using the above-mentioned silicone oil, it is possible to prevent the aggregation of the powdery flame retardant composition, improve the storage stability, and improve the dispersibility in the synthetic resin. In addition, the water resistance can be improved.

[0101] The above silicone oil can be used without particular limitation as long as it is a known silicone oil having a polysiloxane backbone. The above silicone oil can be a polymer having a linear polysiloxane backbone, or all of the side chains of the polysiloxane can be methyl, or a part of the side chains can have phenyl groups, or a part of the side chains can have hydrogen atoms.

[0102] Examples of the silicone oil include: dimethyl silicone oil in which all of the side chains and terminals of the polysiloxane are methyl, methylphenyl silicone oil in which the side chains and terminals of the polysiloxane are methyl and a part of the side chains has phenyl groups, methylhydrogen silicone oil in which the side chains and terminals of the polysiloxane are methyl and a part of the side chains has hydrogen atoms, and copolymers thereof. These silicone oils can also be partially modified by epoxy modification, amino modification, carboxyl modification, etc. They can be used alone or in combination of two or more.

[0103] Among the silicone oils, from the viewpoints of preventing the aggregation of the powdery flame retardant composition, improving the storage stability, and improving the dispersibility in the synthetic resin, dimethyl silicone oil and methylhydrogen silicone oil are preferred, and methylhydrogen silicone oil is more preferred.

[0104] For the above-mentioned silane coupling agents, for example, as silane coupling agents having alkenyl groups, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltris(2-methoxyethoxy)silane, vinylmethyldimethoxysilane, octenyltrimethoxysilane, allyltrimethoxysilane, p-styryltrimethoxysilane, etc. can be cited; as silane coupling agents having acryloyl groups, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltriethoxysilane, etc. can be cited; as silane coupling agents having methacryloyl groups, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, methacryloxyoctyltrimethoxysilane, etc. can be cited; as silane coupling agents having epoxy groups, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, glycidoxyoctyltrimethoxysilane, etc. can be cited; as silane coupling agents having amino groups, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3-dimethyl-butylene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N,N'-bis[3-(trimethoxysilyl)propyl]ethylenediamine, hydrochloride of N-(vinylbenzyl)-2-aminoethyl-3-aminopropyltrimethoxysilane, etc. can be cited; as silane coupling agents having isocyanurate groups, tris-(trimethoxysilylpropyl)isocyanurate can be cited; as silane coupling agents having mercapto groups, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, etc. can be cited; as silane coupling agents having ureido groups, 3-ureidopropyltrimethoxysilane, 3-ureidopropyltriethoxysilane, etc. can be cited; as silane coupling agents having thioether groups, bis(triethoxysilylpropyl)tetrasulfide can be cited; as silane coupling agents having thioester groups, 3-octanoylthio-1-propyltriethoxysilane can be cited; as silane coupling agents having isocyanate groups, 3-isocyanatopropyltriethoxysilane, 3-isocyanatopropyltrimethoxysilane, etc. can be cited. They can be used alone or in combination of two or more kinds.

[0105] Among these silane coupling agents, from the viewpoints of flame retardancy, processability, prevention of agglomeration of flame retardant powder, and improvement of storage stability, silane coupling agents having an epoxy group are preferred, and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, and glycidoxyoctyltrimethoxysilane are more preferred.

[0106] When the flame retardant composition of the present embodiment contains silicone oil, from the viewpoint of improving the above effects brought by the inclusion of silicone oil, the content of silicone oil is preferably 0.01 to 3 parts by mass, more preferably 0.1 to 1 part by mass, based on 100 parts by mass in total of components (A) and (B).

[0107] When the flame retardant composition of the present embodiment contains a silane coupling agent, from the viewpoint of improving the above effects brought by the inclusion of the silane coupling agent, the content of the silane coupling agent is preferably 0.01 to 3 parts by mass, more preferably 0.1 to 1 part by mass, based on 100 parts by mass in total of components (A) and (B).

[0108] As a method for adding the above surface treatment agent, for example, a method of mixing a powdery or granular flame retardant composition with the surface treatment agent, a method of spray-drying the surface treatment agent and adding and mixing it, etc. can be mentioned. In addition, it can also be added to the flame retardant composition by subjecting all or part of the flame retardant composition to surface treatment with the above surface treatment agent.

[0109] The flame retardant composition of the present embodiment may contain a processing aid.

[0110] As the above processing aid, it can be appropriately selected from known processing aids, and an acrylic processing aid may also be included.

[0111] As the above acrylic processing aid, for example, homopolymers or copolymers of alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, and butyl methacrylate; copolymers of the above alkyl methacrylates and alkyl acrylates such as methyl acrylate, ethyl acrylate, and butyl acrylate; copolymers of the above alkyl methacrylates and aromatic vinyl compounds such as styrene, α-methylstyrene, and vinyltoluene; copolymers of the above alkyl methacrylates and vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, etc. They can be used alone or in combination of two or more.

[0112] The flame retardant composition of the present embodiment may contain a dust inhibitor.

[0113] Examples of the above dust inhibitor include aliphatic dicarboxylic acid ether ester compounds and the above silane coupling agents, etc.

[0114] The flame retardant composition of this embodiment may contain other components within the range that does not impair the effects of the present invention. As other components, additives commonly used for modifying thermoplastic resins can be used. For example, antioxidants, light stabilizers, ultraviolet absorbers, crystal nucleating agents, clarifying agents, plasticizers, lubricants, flame retardants (excluding the above components (A), (B), and (C)), reinforcing materials, crosslinking agents, antistatic agents, metal soaps, fillers, antifogging agents, anti-plate out agents, fluorescent agents, mildew-proof agents, bactericides, foaming agents, metal deactivators, mold release agents, pigments, dyes, etc. can be cited. They can be used alone or in combination of two or more.

[0115] Examples of the antioxidant include phenolic antioxidants, phosphite antioxidants, thioether antioxidants, and other antioxidants, etc.

[0116] As phenolic antioxidants, for example, the following can be cited: 2,6-di-tert-butyl-p-cresol, 2,6-diphenyl-4-octadecyloxyphenol, distearyl (3,5-di-tert-butyl-4-hydroxybenzyl) phosphonate, 1,6-hexamethylenebis[(3,5-di-tert-butyl-4-hydroxyphenyl) propionamide], 4,4'-thiobis(6-tert-butyl-m-cresol), 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol), 4,4'-butylidenebis(6-tert-butyl-m-cresol), 2,2'-ethylidenebis(4,6-di-tert-butylphenol), 2,2'-ethylidenebis(4-sec-butyl-6-tert-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-tris(2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanurate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, 2-tert-butyl-4-methyl-6-(2-acryloyloxy-3-tert-butyl-5-methylbenzyl) phenol, stearyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetra[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], thiodiethylene glycol bis[(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,6-hexamethylenebis[(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], bis[3,3-bis(4-hydroxy-3-tert-butylphenyl) butyric acid] glycol ester, bis[2-tert-butyl-4-methyl-6-(2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl] terephthalate, 1,3,5-tris[(3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, 3,9-bis[1,1-dimethyl-2-{(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl]-2,4,8,10-tetraoxaspiro[5,5] undecane, triethylene glycol bis[(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], etc. These phenolic antioxidants can be used alone or in combination of two or more.

[0117] As phosphite antioxidants, examples include: trinonylphenyl phosphite, tris[2-tert-butyl-4-(3-tert-butyl-4-hydroxy-5-methylphenylthio)-5-methylphenyl] phosphite, tridecyl phosphite, octyldiphenyl phosphite, didecyl monophenyl phosphite, bis(tridecyl)pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, bis(2,4,6-tri-tert-butylphenyl)pentaerythritol diphosphite, bis(2,4-dicumylphenyl)pentaerythritol diphosphite, tetra(tridecyl) isopropylidene diphenol diphosphite, tetra(tridecyl)-4,4'-n-butylidenebis(2-tert-butyl-5-methylphenol) diphosphite, hexa(tridecyl)-1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane triphosphite, tetra(2,4-di-tert-butylphenyl)biphenylene diphosphonate, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 2,2'-methylenebis(4,6-di-tert-butylphenyl)-2-ethylhexyl phosphite, 2,2'-methylenebis(4,6-di-tert-butylphenyl)-octadecyl phosphite, 2,2'-ethylenebis(4,6-di-tert-butylphenyl) fluoro phosphite, tris[2-[(2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepine-6-yl)oxy]ethyl]amine, phosphite of 2-ethyl-2-butyl propylene glycol and 2,4,6-tri-tert-butylphenol, etc. These phosphite antioxidants can be used alone or in combination of two or more.

[0118] As thioether antioxidants, examples include: 3,3'-thiodipropionic acid, alkyl (C 12-14), Thiopropionic acid, bis(lauryl)-3,3'-thiodipropionate, ditridecyl 3,3'-thiodipropionate, bis(myristyl)-3,3'-thiodipropionate, bis(stearyl)-3,3'-thiodipropionate, bis(octadecyl)-3,3'-thiodipropionate, lauryl stearyl thiodipropionate, tetra[methylene-3-(dodecylthio)propionate]methane, thio-bis(2-tert-butyl-5-methyl-4,1-phenylene)bis(3-(dodecylthio)propionate), 2,2'-thiodiethylenebis(3-aminobutyrate), 4,6-bis(octylthiomethyl)-o-cresol, 2,2'-thiodiethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,2'-thiobis(4-methyl-6-tert-butylphenol), 2,2'-thiobis(6-tert-butyl-p-cresol), 2-ethylhexyl (3,5-di-tert-butyl-4-hydroxybenzyl)thioacetate, 4,4'-thiobis(6-tert-butyl-3-methylphenol), 4,4'-thiobis(4-methyl-6-tert-butylphenol), 4,4'-[thiobis(methylene)]bis(2-tert-butyl-6-methyl-1-hydroxybenzyl), bis(4,6-di-tert-butylphenol-2-yl) sulfide, tridecyl 3,5-di-tert-butyl-4-hydroxybenzylthioacetate, 1,4-bis(octylthiomethyl)-6-methylphenol, 2,4-bis(dodecylthiomethyl)-6-methylphenol, distearyl disulfide, bis(methyl-4-[3-n-alkyl (C 12 / C 14 ), thioacryloyloxy]5-tert-butylphenyl)sulfide, etc. These thioether-based antioxidants can be used alone or in combination of two or more.

[0119] As other antioxidants, examples thereof include nitrone compounds such as N-benzyl-α-phenylnitrone, N-ethyl-α-methylnitrone, N-octyl-α-heptylnitrone, N-lauryl-α-undecylnitrone, N-tetradecyl-α-tridecylnitrone, N-hexadecyl-α-pentadecylnitrone, N-octyl-α-heptadecylnitrone, N-hexadecyl-α-heptadecylnitrone, N-octadecyl-α-pentadecylnitrone, N-heptadecyl-α-heptadecylnitrone, N-octadecyl-α-heptadecylnitrone; benzofuran compounds such as 3-arylbenzofuran-2(3H)-one, 3-(alkoxyphenyl)benzofuran-2-one, 3-(acyloxyphenyl)benzofuran-2(3H)-one, 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-benzofuran-2(3H)-one, 5,7-di-tert-butyl-3-(4-hydroxyphenyl)-benzofuran-2(3H)-one, 5,7-di-tert-butyl-3-{4-(2-hydroxyethoxy)phenyl}-benzofuran-2(3H)-one, 6-(2-(4-(5,7-di-tert-butyl-2-oxo-2,3-dihydrobenzofuran-3-yl)phenoxy)ethoxy)-6-oxohexyl 6-((6-hydroxyhexanoyl)oxy)hexanoate, 5-di-tert-butyl-3-(4-((15-hydroxy-3,6,9,13-tetraoxapentadecyl)oxy)phenyl)benzofuran-2(3H)one, etc. These other antioxidants may be used alone or in combination of two or more.

[0120] As a light stabilizer, for example, the following can be cited: 2,2,6,6-tetramethyl-4-piperidyl stearate, 1,2,2,6,6-pentamethyl-4-piperidyl stearate, 2,2,6,6-tetramethyl-4-piperidyl benzoate, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, tetra(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butane tetracarboxylate, tetra(1,2,2,6,6-pentamethyl-4-piperidyl)-1,2,3,4-butane tetracarboxylate, bis(2,2,6,6-tetramethyl-4-piperidyl)·bis(tridecyl)-1,2,3,4-butane tetracarboxylate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)·bis(tridecyl)-1,2,3,4-butane tetracarboxylate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)-2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl) malonate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate condensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine condensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine condensate, 1,5,8,12-tetra[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetra[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-s-triazin-6-yl]-1,5,8,12-tetraazadodecane, 1,6,11-tri[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-s-triazin-6-yl]aminoundecane, 1,6,11-tri[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-s-triazin-6-yl]aminoundecane, bis(2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl) sebacate, bis(2,2,6,6-tetramethyl-1-undecyloxypiperidin-4-yl) carbonate, 2,2,6,6-tetramethyl-4-piperidyl methacrylate, 1,2,3,4-butane tetracarboxylic acid, polymer of 2,2-bis(hydroxymethyl)-1,3-propanediol and 3-hydroxy-2,2-dimethylpropanal, 1,2,2,6,6-pentamethyl-4-piperidyl ester, 1,3-bis(2,2,6,6-tetramethylpiperidin-4-yl) 2,4-bis(tridecyl)benzene-1,2,3,4-tetracarboxylate, bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino]), TINUVIN NOR 371 manufactured by BASF Corporation, etc. These light stabilizers can be used alone or in combination of two or more kinds.,

[0121] Examples of the ultraviolet absorber include: 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 5,5'-methylenebis(2-hydroxy-4-methoxybenzophenone) and other 2-hydroxybenzophenone derivatives; 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-dicumenylphenyl)benzotriazole, 2,2'-methylenebis(4-tert-octyl-6-(benzotriazolyl)phenol), 2-(2'-hydroxy-3'-tert-butyl-5'-carboxyphenyl)benzotriazole and other 2-(2'-hydroxyphenyl)benzotriazole derivatives; phenyl salicylate, resorcinol monobenzoate, 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, 2,4-di-tert-amylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, cetyl-3,5-di-tert-butyl-4-hydroxybenzoate and other benzoate derivatives; 2-ethyl-2'-ethoxyoxanilide, 2-ethoxy-4'-dodecyloxanilide and other substituted oxanilide derivatives; ethyl-α-cyano-β,β-diphenylacrylate, methyl-2-cyano-3-methyl-3-(p-methoxyphenyl)acrylate and other cyanoacrylate derivatives; 2-(2-hydroxy-4-octoxyphenyl)-4,6-bis(2,4-di-tert-butylphenyl)-s-triazine, 2-(2-hydroxy-4-methoxyphenyl)-4,6-diphenyl-s-triazine, 2-(2-hydroxy-4-propoxy-5-methylphenyl)-4,6-bis(2,4-di-tert-butylphenyl)-s-triazine and other triaryltriazine derivatives. These ultraviolet absorbers can be used alone or in combination of two or more kinds.,

[0122] As crystallization nucleating agents, for example, there can be mentioned: carboxylic acid metal salts such as sodium benzoate, aluminum 4-tert-butylbenzoate, sodium adipate, disodium bicyclo[2.2.1]heptane-2,3-dicarboxylate; phosphate metal salts such as sodium bis(4-tert-butylphenyl) phosphate, sodium 2,2'-methylenebis(4,6-di-tert-butylphenyl) phosphate, lithium 2,2'-methylenebis(4,6-di-tert-butylphenyl) phosphate; polyol derivatives such as dibenzylidene sorbitol, bis(methylbenzylidene) sorbitol, bis(3,4-dimethylbenzylidene) sorbitol, bis(p-ethylbenzylidene) sorbitol, bis(dimethylbenzylidene) sorbitol, 1,2,3-trideoxy-4,6:5,7-bis-O-((4-propylphenyl)methylene)-nonitol, 1,3:2,4-bis(p-methylbenzylidene) sorbitol, 1,3:2,4-bis-O-benzylidene-D-glucitol (dibenzylidene sorbitol); amide compounds such as N,N',N''-tris[2-methylcyclohexyl]-1,2,3-propanetricarboxamide, N,N',N''-tricyclohexyl-1,3,5-benzenetricarboxamide, N,N'-dicyclohexyl-naphthalenedicarboxamide, 1,3,5-tris(dimethylpropionylamino)benzene, etc. These crystallization nucleating agents can be used alone or in combination of two or more.

[0123] As plasticizers, for example, there can be mentioned: epoxy plasticizers such as epoxidized soybean oil, epoxidized linseed oil, octyl epoxidized fatty acid; methacrylate plasticizers; polyester plasticizers such as condensates of dicarboxylic acids and polyols, condensates of polycarboxylic acids and polyols; polyether ester plasticizers such as condensates of dicarboxylic acids, polyols and alkylene glycols, condensates of dicarboxylic acids, polyols and arylene glycols, condensates of polycarboxylic acids, polyols and alkylene glycols, condensates of polycarboxylic acids, polyols and arylene glycols; aliphatic ester plasticizers such as adipates, succinates; aromatic ester plasticizers such as phthalates, terephthalates, trimellitates, pyromellitates, benzoates, etc. These plasticizers can be used alone or in combination of two or more.

[0124] As lubricants, there can be mentioned: pure hydrocarbon lubricants such as liquid paraffin, natural paraffin, microcrystalline wax, synthetic paraffin, low molecular weight polyethylene, polyethylene wax; halogenated hydrocarbon lubricants; fatty acid lubricants such as higher fatty acids, hydroxy fatty acids; fatty acid amide lubricants such as fatty acid amides, bis-fatty acid amides; ester lubricants such as lower alcohol esters of fatty acids, polyol esters of fatty acids such as glycerol esters, polyethylene glycol esters of fatty acids, fatty alcohol esters of fatty acids (ester wax); lubricants of metal soaps, fatty alcohols, polyols, polyethylene glycol, polyglycerol, partial esters of fatty acids and polyols, partial esters of fatty acids and polyethylene glycol, polyglycerol, silicone oils, mineral oils, etc. These lubricants can be used alone or in combination of two or more.

[0125] As flame retardants other than the above components (A), (B), and (C), examples include: triphenyl phosphate, tricresyl phosphate, tris(dimethylphenyl) phosphate, tolyldiphenyl phosphate, tolyl-2,6-bis(dimethylphenyl) phosphate, resorcinol bis(diphenyl phosphate), (1-methylethylidene)-4,1-phenylene tetraphenyl diphosphate, 1,3-phenylene tetrakis(2,6-dimethylphenyl) phosphate, aromatic phosphates such as those manufactured by ADEKA Corporation under the trade names "Adekastab FP-500", "Adekastab FP-600", "Adekastab FP-800", "Adekastab FP-900L"; phosphites such as divinyl phenyl phosphite, diallyl phenyl phosphite, (1-butenyl) phenyl phosphite; phosphonates such as phenyl diphenyl phosphonate, methyl diphenyl phosphonate, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derivatives; dialkyl phosphonates such as aluminum diethyl phosphonate, zinc diethyl phosphonate; phosphazene compounds such as bis(2-allylphenoxy) phosphazene, xylenyl phosphazene; inorganic phosphorus-based flame retardants such as red phosphorus; metal hydroxides such as magnesium hydroxide, aluminum hydroxide; brominated bisphenol A epoxy resins, brominated phenol novolac epoxy resins, hexabromobenzene, pentabromotoluene, ethylenebis(pentabromophenyl), ethylenebis(tetrabromophthalimide), 1,2-dibromo-4-(1,2-dibromoethyl) cyclohexane, tetrabromocyclooctane, hexabromocyclododecane, bis(tribromophenoxy) ethane, brominated polyphenylene ether, brominated polystyrene, and 2,4,6-tris(tribromophenoxy)-1,3,5-triazine, tribromophenyl maleimide, tribromophenyl acrylate, tribromophenyl methacrylate, tetrabromobisphenol A dimethacrylate, pentabromobenzyl acrylate, brominated styrene, and other bromine-based flame retardants. These flame retardants can be used alone or in combination of two or more.

[0126] As antistatic agents, examples include: cationic antistatic agents such as fatty acid quaternary ammonium ion salts, polyamine quaternary salts; anionic antistatic agents such as higher alcohol phosphate esters, higher alcohol EO adducts, polyethylene glycol fatty acid esters, anionic alkyl sulfonates, higher alcohol sulfate esters, higher alcohol ethylene oxide adduct sulfate esters, higher alcohol ethylene oxide adduct phosphate esters; nonionic antistatic agents such as polyol fatty acid esters, polyethylene glycol phosphate esters, polyoxyethylene alkyl allyl ethers; amphoteric antistatic agents such as amphoteric alkyl betaines such as alkyl dimethylaminoacetic acid betaine, imidazoline-type amphoteric surfactants. These antistatic agents can be used alone or in combination of two or more.

[0127] Examples of the filler include talc, mica, calcium carbonate, calcium oxide, calcium hydroxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, magnesium sulfate, aluminum hydroxide, barium sulfate, glass powder, glass fiber, clay, dolomite, silica, alumina, potassium titanate whisker, wollastonite, fibrous magnesium oxysulfide, montmorillonite, etc. The particle size (in the case of fibrous materials, the fiber diameter, fiber length, and aspect ratio) can be appropriately selected for use. These fillers can be used alone or in combination of two or more. Additionally, surface-treated fillers can be used as needed.

[0128] Examples of the pigment include: Pigment Red 1, 2, 3, 9, 10, 17, 22, 23, 31, 38, 41, 48, 49, 88, 90, 97, 112, 119, 122, 123, 144, 149, 166, 168, 169, 170, 171, 177, 179, 180, 184, 185, 192, 200, 202, 209, 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 254; Pigment Orange 13, 31, 34, 36, 38, 43, 46, 48, 49, 51, 52, 55, 59, 60, 61, 62, 64, 65, 71; Pigment Yellow 1, 3, 12, 13, 14, 16, 17, 20, 24, 55, 60, 73, 81, 83, 86, 93, 95, 97, 98, 100, 109, 110, 113, 114, 117, 120, 125, 126, 127, 129, 137, 138, 139, 147, 148, 150, 151, 152, 153, 154, 166, 168, 175, 180, 185; Pigment Green 7, 10, 36; Pigment Blue 15, 15:1, 15:2, 15:3, 15:4, 15:5, 15:6, 22, 24, 56, 60, 61, 62, 64; Pigment Violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 50, etc. These pigments can be used alone or in combination of two or more.

[0129] Examples of the dye include: azo dyes, anthraquinone dyes, indigo dyes, triarylmethane dyes, xanthene dyes, alizarin dyes, acridine dyes, stilbene dyes, thiazole dyes, naphthol dyes, quinoline dyes, nitro dyes, indane dyes, oxazine dyes, phthalocyanine dyes, cyanine dyes, etc. These dyes can be used alone or in combination of two or more.

[0130] It should be noted that one or more selected from the above flame retardant aids, anti-dripping agents, surface treatment agents, processing aids, dust inhibitors, and additives containing other components can be incorporated into the above flame retardant composition or into the flame retardant resin composition described later.

[0131] The flame retardant composition of the present invention is effective for flame retardant of synthetic resins, and is preferably incorporated into synthetic resins to be used as a flame retardant resin composition.

[0132] <Flame Retardant Resin Composition>

[0133] Hereinafter, the flame retardant resin composition of the present embodiment will be described.

[0134] The above flame retardant resin composition contains the above flame retardant composition and a thermoplastic resin.

[0135] The content of the above flame retardant composition is, for example, 10 to 400 parts by mass, preferably 15 to 200 parts by mass, and more preferably 20 to 70 parts by mass with respect to 100 parts by mass of the thermoplastic resin. Thereby, the flame retardancy of the thermoplastic resin can be sufficiently improved.

[0136] Examples of the above thermoplastic resin include synthetic resins such as polyolefin resins, styrene resins, polyester resins, polyether resins, polycarbonate resins, polyamide resins, and halogen-containing resins. They can be used alone or in combination of two or more.

[0137] If further examples of the above thermoplastic resin are listed, for example, petroleum resins, coumarone resins, polyvinyl acetate, acrylic resins, polymethyl methacrylate, polyvinyl alcohol, polyvinyl formal, polyvinyl butyral, polyphenylene sulfide, polyurethane, cellulose resins, polyimide resins, polysulfone, liquid crystal polymers and their blends can be used.

[0138] In addition, the above thermoplastic resin may be a thermoplastic elastomer such as isoprene rubber, butadiene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber, olefin elastomer, styrene elastomer, polyester elastomer, nitrile elastomer, nylon elastomer, vinyl chloride elastomer, polyamide elastomer, polyurethane elastomer, etc., or these may be used in combination.

[0139] Specific examples of the above-mentioned thermoplastic resins are not particularly limited. For example, polyolefin resins such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polybutene-1, poly-3-methylpentene, poly-4-methylpentene, and ethylene / propylene block or random copolymers and other α-olefin polymers; thermoplastic linear polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene hexaphthalate; polysulfide resins such as polyphenylene sulfide; polylactic acid resins such as polycaprolactone; linear polyamide resins such as polyhexamethylene adipamide; and crystalline polystyrene resins such as syndiotactic polystyrene, etc.

[0140] These thermoplastic resins can be used regardless of the molecular weight, degree of polymerization, density, softening point, proportion of components insoluble in solvents, degree of stereoregularity, presence or absence of catalyst residues, types of monomers as raw materials, blending ratios, types of polymerization catalysts (such as Ziegler catalysts, metallocene catalysts, etc.). Among these thermoplastic resins, from the viewpoint of being able to impart excellent flame retardancy, one or more selected from polyolefin resins, polystyrene resins, and their copolymers are preferred, polyolefin resins are more preferred, polypropylene, high-density polyethylene, low-density polyethylene, and linear low-density polyethylene are further more preferred, and the case of using them in combination with thermoplastic elastomers is also preferred.

[0141] The flame-retardant resin composition of this embodiment may contain glass fibers. Thereby, the resin physical properties and flame retardancy can be improved.

[0142] Regarding the above-mentioned glass fibers, the types are not particularly limited, and E glass, C glass, S glass, D glass, etc. can all be used. In addition, the form is not particularly limited, and any glass fibers such as chopped strands, rovings, yarns, and glass wool can also be used. The above-mentioned glass fibers can be commercially available products.

[0143] From the viewpoints of processability and flame retardancy, the above-mentioned glass fibers are preferably chopped strands formed by bundling single fibers. When using chopped strands, from the viewpoints of processability and flame retardancy, the cutting length is preferably 0.5 mm to 10 mm, more preferably 2 mm to 5 mm. In addition, from the viewpoints of processability and flame retardancy, the diameter of the single fiber is preferably 8 μm to 20 μm, more preferably 10 μm to 15 μm.

[0144] In order to achieve good wettability, adhesiveness, etc. with the thermoplastic resin, the above glass fibers can be treated with a surface treatment agent. As such a surface treatment agent, for example, silane-based, titanate-based, aluminum-based, chromium-based, zirconium-based, borane-based coupling agents, etc. can be cited. Among them, silane-based coupling agents and titanate-based coupling agents are preferred, and silane-based coupling agents are particularly preferred. As such silane-based coupling agents, for example, triethoxysilane, vinyltris(β-methoxyethoxy)silane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-chloropropyltrimethoxysilane, etc. can be cited.

[0145] Regarding the above glass fibers, in order to bundle the glass fibers, a bundling agent can be used. As the bundling agent, for example, polypropylene resin, polyurethane resin, polyester resin, acrylic resin, epoxy resin, starch, vegetable oil, etc. can be cited.

[0146] In the flame-retardant resin composition of the present embodiment, from the viewpoints of processability and flame retardancy, the content of the glass fibers is preferably 1 to 100 parts by mass, more preferably 5 to 80 parts by mass, and still more preferably 10 to 70 parts by mass with respect to 100 parts by mass of the thermoplastic resin.

[0147] In addition to the above flame retardant composition, the flame-retardant resin composition of the present embodiment may further contain one or more selected from the above flame retardant aids, anti-dripping agents, surface treatment agents, dust inhibitors, and additives containing other components as needed. They can be used alone or in combination of two or more.

[0148] The content of the additives (excluding fillers and flame retardants other than the components (A) to (C) of the present invention) in the above flame-retardant resin composition is, for example, 0.001 to 15 parts by mass, preferably 0.005 to 10 parts by mass, and more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the thermoplastic resin. By setting it within such a numerical range, the effect of the additives can be improved.

[0149] When a filler is incorporated in the above flame-retardant resin composition, the content is, for example, 1 to 100 parts by mass, preferably 3 to 80 parts by mass, and more preferably 5 to 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin.

[0150] When a flame retardant other than the components (A) to (C) of the present invention is incorporated into the above flame retardant resin composition, the content is, for example, 1 to 200 parts by mass, preferably 3 to 150 parts by mass, and more preferably 5 to 80 parts by mass relative to 100 parts by mass of the thermoplastic resin.

[0151] When the above flame retardant resin composition uses a polyolefin resin or an olefin-based elastomer as the thermoplastic resin, in order to neutralize the catalyst residues in the resin, it preferably contains a known neutralizing agent within the range that does not impair the effects of the present invention. Examples of the neutralizing agent include fatty acid metal salts such as calcium stearate, lithium stearate, sodium stearate, and magnesium stearate; fatty acid amide compounds such as ethylene bis(stearamide), ethylene bis(12-hydroxystearamide), and stearamide; or inorganic compounds such as hydrotalcite. These neutralizing agents can be used alone or in combination of two or more. The usage amount of these neutralizing agents is preferably 0.001 to 3 parts by mass, and more preferably 0.01 to 1 part by mass relative to 100 parts by mass of the thermoplastic resin.

[0152] Next, the manufacturing method of the above flame retardant resin composition will be described.

[0153] The above flame retardant resin composition can be obtained by mixing the above flame retardant composition with a thermoplastic resin. If necessary, the above additives can also be mixed. The additives can be mixed into the flame retardant composition or into the mixture of the flame retardant composition and the thermoplastic resin.

[0154] As the mixing method, a generally used known method can be directly adopted. For example, there can be mentioned: a method of mixing the flame retardant composition, the thermoplastic resin, and, if necessary, the additives using a conventional mixer, stirrer, or other mixing machines; a method of melt-kneading using an extruder or the like; a method of mixing with a solvent and performing solution casting, etc.

[0155] The above flame retardant resin composition can be used in various forms, for example, pellet form, granular form, powder form, etc. From the viewpoint of operability, pellet form is preferred.

[0156] <Molded article>

[0157] By using the above flame retardant resin composition for molding, a molded article can be manufactured.

[0158] As the above molding method, there is no particular limitation, and examples include injection molding method, extrusion molding method, blow molding method, rotational molding, vacuum molding method, blow molding method, calendering molding method, slush molding method, dipping molding method, foaming molding method, additive manufacturing method, etc. Among them, the injection molding method, extrusion molding method, and blow molding method are preferred.

[0159] Thus, molded articles of various shapes such as resin plates, sheets, films, and shaped articles can be manufactured.

[0160] The molded articles made from the above flame-retardant resin composition can be used for various purposes. For example, they can be used for interior materials for transportation machinery such as automobiles, ships, airplanes, and railway vehicles, building components such as interior building materials, electrical and electronic components, mechanical components, optical devices, automotive parts, and daily necessities. Among them, due to excellent flame retardancy, they can be preferably used for interior materials for transportation machinery, interior building materials, and electrical and electronic components.

[0161] The above flame-retardant resin composition and its molded articles can be used in a wide range of industrial fields such as electrical, electronic, and communication, agriculture, forestry, and fisheries, mining, construction, food, fiber, clothing, medical, coal, petroleum, rubber, leather, automotive, precision equipment, wood, building materials, civil engineering, furniture, printing, and musical instruments. Specifically, the flame-retardant resin composition and its molded articles of the present invention can be used for office and OA equipment such as printers, personal computers, word processors, keyboards, PDAs (small information terminals), telephones, copiers, fax machines, ECRs (electronic cash registers), calculators, electronic notebooks, cards, brackets, stationery, etc., household appliances such as washing machines, refrigerators, vacuum cleaners, microwave ovens, lighting fixtures, game consoles, irons, kotatsu, etc., AV equipment such as TVs, VTRs, cameras, cassette recorders, tape recorders, minidisks, CD players, speakers, liquid crystal displays, etc., electrical and electronic parts and communication equipment such as connectors, relays, capacitors, switches, printed circuit boards, bobbin holders, semiconductor encapsulants, LED encapsulants, wires, cables, transformers, deflection yokes, switchboards, clocks, etc.

[0162] The above flame-retardant resin composition and its molded articles can be used, for example, in materials for automobiles, vehicles, ships, airplanes, buildings, houses, etc., such as seats (fillings, fabrics, etc.), seat belts, ceilings, roofs, armrests, door trim panels, rear parcel shelves, carpets, mats, sun visors, wheel covers, mattress covers, airbags, insulating materials, pull rings, pull ring tapes, wire coating materials, electrical insulation materials, coatings, coating materials, decorative materials, floor materials, corner walls, carpets, wallpapers, wall coverings, exterior materials, interior materials, roof materials, deck boards, wall materials, column materials, backing plates, fence materials, frames and concave moldings, window and door materials, shingles, board walls, patios, balconies, sound insulation boards, heat insulation boards, window materials, etc., building materials, civil engineering materials, clothing materials, curtains, sheets, plywood, fiberboards, carpets, entrance mats, seat cushions, buckets, pipes, containers, glasses, bags, boxes, goggles, skis, rackets, tents, musical instruments, etc., in various fields such as daily necessities and sports goods.

[0163] The above describes the embodiments of the present invention, but these are merely illustrative examples of the present invention, and various configurations other than the above can also be adopted. In addition, the present invention is not limited to the above embodiments, and modifications, improvements, etc. within the scope capable of achieving the object of the present invention are included in the present invention.

[0164] Examples

[0165] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by any of the descriptions of these examples. In addition, all the compounding amounts described in Table 1 are based on mass parts.

[0166] (Examples 1 to 18 and Comparative Examples 1 to 9)

[0167] <Production Example 1: Production of Component (A): Melamine Salt>

[0168] Melamine orthophosphate was heated and subjected to a solid-phase condensation reaction at 220 °C for 6 hours to produce a melamine salt mainly composed of melamine pyrophosphate. The melamine salt was used directly without purification. The purity of melamine pyrophosphate (MPP) in the melamine salt was 98.5%.

[0169] <Production Example 2: Production of Component (B): Piperazine Salt>

[0170] Piperazine diphosphate was heated and subjected to a solid-phase condensation reaction at 250 °C for 1 hour to produce a piperazine salt mainly composed of piperazine pyrophosphate. The piperazine salt was used directly without purification. The purity of piperazine pyrophosphate (PPP) in the piperazine salt was 99.0%.

[0171] The purity of the above melamine salt and piperazine salt was measured using an ion chromatography measuring device ICS-2100 (Thermo Fisher Scientific Co., Ltd.), Dionex IonPac AS-19 column (Thermo Fisher Scientific Co., Ltd.), and a conductivity detector.

[0172] <Production Example 3: Production of Polypropylene Composition>

[0173] With respect to 100 mass parts of an impact copolymer polypropylene (melt flow rate [230 °C, load 2.16 kg] 14 g / 10 min), 0.1 mass part of pentaerythritol tetra[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] as a phenolic antioxidant, 0.1 mass part of tris(2,4-di-tert-butylphenyl) phosphite as a phosphorus-based antioxidant, and 0.1 mass part of calcium stearate as a neutralizing agent were mixed to prepare a polypropylene composition.

[0174] The details of each component in Table 1 are as follows.

[0175] Polypropylene composition: Use the polypropylene composition produced in Production Example 3 above.

[0176] Glass fiber: Chopped strand, trade name CSF3PE-957S, manufactured by Nitto Boseki, cut length 3.0 mm, single fiber diameter 13 μm

[0177] (A) Melamine salt: Use the melamine salt produced in Production Example 1 above.

[0178] (B) Piperazine salt: Use the piperazine salt produced in Production Example 2 above.

[0179] (C) Metal phosphonate 1: Aluminum diethylphosphonate (DEPAl)

[0180] (C) Metal phosphonate 2: Sodium diethylphosphonate (DEPNa)

[0181] (C) Metal phosphonate 3: Zinc diethylphosphonate (DEPZn)

[0182] (C) Metal phosphonate 4: Iron(III) diethylphosphonate (DEPFe)

[0183] <Manufacture of Flame-Retardant Resin Composition>

[0184] Mix the respective components in the compounding amounts shown in Table 1, and perform melt-kneading using a twin-screw extruder (TEX25αIII, manufactured by Japan Steel Works, Ltd.) under the conditions of a barrel temperature of 180 to 230°C and a screw speed of 150 rpm to obtain a resin strand. Cut the obtained resin strand with a pelletizer to obtain a pelletized flame-retardant resin composition.

[0185] Use the obtained flame-retardant resin composition to evaluate the following items.

[0186] <Production of Test Pieces for Evaluation Tests>

[0187] Perform injection molding on the obtained pelletized flame-retardant resin composition using an injection molding machine (NEX-80, manufactured by Nissei Plastic Industrial Co., Ltd.) under the conditions of a barrel temperature of 210°C and a mold temperature of 40°C to obtain test pieces of 100 mm × 100 mm × 3 mm and test pieces of 127 mm × 12.7 mm × 1.6 mm. Use these test pieces to conduct the following flame-retardancy evaluation.

[0188] <Evaluation of Processability: Measurement of Injection Pressure>

[0189] Using an injection molding machine (NEX-80, manufactured by Nissei Plastic Industrial Co., Ltd.), the above-obtained pelletized flame-retardant resin composition was injection-molded under the conditions of a barrel temperature of 210 °C, an injection speed of 20 mm / sec, a back pressure of 5 MPa, a holding pressure of 30 MPa, and a mold temperature of 40 °C into a test piece of 100 mm × 100 mm × 3 mm (side gate on one side). The maximum value of the injection pressure at the time of V-P switching was recorded. Here, "at the time of V-P switching" refers to the switching time from the injection process controlled by the injection speed to the holding pressure process controlled by the injection pressure.

[0190] <Flame-retardant evaluation: Vertical cone calorimeter combustion test>

[0191] A cone calorimeter (CONE III manufactured by Toyo Seiki Seisaku-sho, Ltd.) was used in the test. The conical heater was set vertically with respect to the ground, and the above-prepared test piece of 100 mm × 100 mm × 3 mm was fixed vertically with respect to the ground in a manner opposite to the heater at a position 25 mm in front of it. After heating for 3 minutes under the condition of a radiant heat flux of 15 kW / m 2 , a spark plug was used to generate a spark at a distance of 5 mm from the surface of the test piece until the test piece caught fire. The maximum heat release rate (PHRR; Peak Heat Release Rate, unit: kW / m 2 ) and the self-extinguishing time (unit: seconds) after the test piece caught fire were measured, and the presence or absence of flaming drips (the dropping of the flaming resin) during combustion was observed. A specimen with a self-extinguishing time exceeding 600 seconds or a specimen in which the test piece burned out was recorded as "BO". The smaller the maximum heat release rate and the shorter the self-extinguishing time, the higher the flame retardancy was evaluated. In addition, the absence of flaming drips means a low possibility of the spread of fire during a fire, and the flame retardancy was evaluated as high. The evaluation results are shown in Table 1.

[0192] <Flame-retardant evaluation: UL-94V>

[0193] The above-prepared test piece was held vertically, and after bringing the lower end into contact with the flame of the burner for 10 seconds, the flame was removed, and the combustion time t1 until the fire on the test piece went out was measured. Then, at the same time as the fire went out, the second contact with the flame for 10 seconds was started, and the combustion time t2 until the fire caught on and went out was measured in the same manner as the first time. In addition, whether the cotton below the test piece caught fire due to the falling fire was also evaluated at the same time. According to t1, t2, the presence or absence of cotton catching fire, etc., the combustion grade was determined according to the UL-94 standard. The combustion grade V-0 is the highest grade, and below, the flame retardancy decreases as it becomes V-1 and V-2. However, a result that does not correspond to any of the V-0 to V-2 grades was set as NR. The results of the combustion grade are shown in Table 1.

[0194] [Table 1]

[0195]

[0196] As can be seen from Table 1, the flame-retardant resin compositions of Examples 1 to 18, with or without glass fiber, showed that, compared with Comparative Examples 1 to 3 and Comparative Examples 5 to 9, no flaming drips occurred during the vertical cone calorimeter combustion test, and compared with Comparative Examples 2 to 9, the combustion rating of UL-94V became higher (V-0). Therefore, excellent flame retardancy was shown.

[0197] In Comparative Examples 1 and 2, in the case of not containing the component (C) or containing a trace amount of the component (C), although a V-0 rating was shown in UL-94V, flaming drips occurred during the vertical cone calorimeter combustion test. In addition, during the vertical cone calorimeter combustion test, self-extinguishing did not occur within 600 seconds, and the value of the injection pressure showed a higher value than that of Examples 1 to 18.

[0198] On the other hand, in Comparative Example 3, in the case of excessively containing the component (C), although the value of the injection pressure was lower than that of Comparative Example 1, it was a V-2 rating in UL-94V, and flaming drips occurred during the vertical cone calorimeter combustion test.

[0199] In addition, in Comparative Examples 4 to 6, in the case of examples not containing the component (B) but containing the components (A) and (C), UL-94V was a V-2 rating, and self-extinguishing did not occur within 600 seconds during the vertical cone calorimeter combustion test.

[0200] In addition, in Comparative Examples 7 to 8, in the case of examples not containing the component (A) but containing the components (B) and (C), UL-94V was a V-2 rating, and flaming drips occurred during the vertical cone calorimeter combustion test.

[0201] In addition, in Comparative Example 9, in the case of containing the components (A), (B) and glass fiber but not containing the component (C), U-94V showed NR, flaming drips occurred during the vertical cone calorimeter combustion test, self-extinguishing did not occur within 600 seconds, and the value of the injection pressure showed a higher value than that of Examples 1 to 18.

[0202] In addition, after manufacturing a flame retardant composition containing the components (A), (B) and (C) (optionally containing the component (D)) in the same compounding ratio as in Table 1 of Examples 1 to 18, and compounding the flame retardant composition into a polypropylene composition, the obtained flame-retardant resin composition also showed the same evaluation results as those of the above Examples 1 to 18.

[0203] Thus, the flame retardant compositions of Examples 1 to 18, when incorporated into a thermoplastic resin (polypropylene composition), showed results capable of improving the flame retardancy of the flame retardant resin composition. In addition, the flame retardant compositions of each example showed improved processability of the thermoplastic resin due to a reduction in the injection pressure during injection molding.

[0204] This application claims priority based on Japanese Patent Application No. 2022-196962 filed on December 9, 2022, and incorporates the entire contents disclosed therein by reference into this application.

Claims

1. A flame retardant composition, characterized in that, Comprising: Component (A), which is one or more melamine salts selected from melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate, Component (B), which is one or more piperazine salts selected from piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate, and Component (C), which is one or more of the dialkyl phosphonate compounds represented by the following general formula (1), In 100 parts by mass of the total content of Component (A), Component (B), and Component (C), the content of Component (C) is 0.2 parts by mass or more and 39 parts by mass or less, ， In the above general formula (1), R 1 , R 2 Each independently represents an alkyl group having 1 to 6 carbon atoms, M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H or a protonated nitrogen base, and n represents an integer of 1 to 4.

2. The flame retardant composition according to claim 1, wherein, In 100 parts by mass of the total content of Component (A), Component (B), and Component (C), the content of Component (C) is 2 parts by mass or more and 25 parts by mass or less.

3. The flame retardant composition according to claim 1 or 2, wherein, In 100 parts by mass of the total content of Component (A) and Component (B), the content of Component (A) is 20 parts by mass or more and 60 parts by mass or less.

4. The flame retardant composition according to any one of claims 1 to 3, wherein, In 100 parts by mass of the total content of Component (A) and Component (B), the content of Component (B) is 40 parts by mass or more and 80 parts by mass or less.

5. The flame retardant composition according to any one of claims 1 to 4, wherein, The flame retardant composition contains at least one or more of R in the general formula (1) 1 and R 2 Each of which is independently any one of alkyl groups having 2 to 4 carbon atoms in the component (C).

6. The flame retardant composition according to any one of claims 1 to 5, wherein, The flame retardant composition contains at least one of Component (C) in which M in the general formula (1) is selected from one of Al, Fe, Zn, and Na.

7. A flame-retardant resin composition, characterized in that, Containing: A thermoplastic resin, and The flame retardant composition according to any one of claims 1 to 6.

8. The flame retardant resin composition according to claim 7, wherein, Relative to 100 parts by mass of the thermoplastic resin, the content of the flame retardant composition is 10 parts by mass or more and 400 parts by mass or less.

9. The flame retardant resin composition according to claim 7 or 8, wherein, The flame retardant resin composition contains glass fiber.

10. A molded article, characterized in that, Is made using the flame retardant resin composition according to any one of claims 7 to 9.

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