JPH08259793A - Flame-retardant resin composition - Google Patents

Abstract

(57) [Summary] [Purpose] Excellent flame retardancy, impact resistance, molding processability, surface appearance of molded products, and low metal adhesion flame retardancy with little generation of burnt foreign matter even in long-term continuous molding. A resin composition is provided. [Structure] (A) 40 to 97% by weight of aromatic polycarbonate, (B) 3 to 60% by weight of rubber-reinforced thermoplastic resin,
(C) Composition 1 comprising 0 to 45% by weight of styrene resin
5 to 45 parts by weight of (D) flame retardant, relative to 00 parts by weight,
(E) A flame-retardant resin composition containing 0.05 to 15 parts by weight of a specific fatty acid ester.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a flame-retardant resin composition having low metal adhesion, which is excellent in impact resistance, moldability, surface appearance of a molded product, and has little generation of burnt foreign matter even in continuous molding for a long period of time. It is about.

Blending an aromatic polycarbonate resin with a rubber-modified thermoplastic resin such as ABS resin makes it possible to improve the impact resistance and molding processability of the ABS in polycarbonate as shown in Japanese Patent Publication No. 58-46269. It is used in resins to improve heat resistance. Further, resin compositions obtained by adding known flame retardants and flame retardant aids to these Brent products are widely used for housings of OA equipment. However, since these compositions have high adhesiveness to metals in a molten state in a molding machine or a cylinder, they tend to adhere to the cylinder or the screw, and burned foreign matter is likely to occur in a long-term continuous molding. Further, it is known to add a fatty acid ester such as polyethylene wax or butyl stearate as a lubricant to these compositions to reduce the mold release resistance from the molds. JP-B-47-41093 and JP-B-47-41.
092 and the like. However, although these lubricants reduce the adhesiveness between the molded resin composition and the mold, the adhesiveness to the metal in the molten state in the cylinder or the like could not be reduced.

The present invention has been made against the background of the above-mentioned problems of the prior art. It is excellent in flame retardancy, heat resistance, impact resistance, moldability, and surface appearance of molded products, It is an object of the present invention to provide a flame-retardant resin composition having low metal adhesiveness, which is less likely to cause burnt foreign matter even in continuous molding of.

[0002]

The present invention provides (A) 40 to 97% by weight of an aromatic polycarbonate, (B) an aromatic vinyl compound in the presence of a rubbery polymer (b), or an aromatic vinyl compound and 3 to 60% by weight of a graft polymer obtained by graft-polymerizing another vinyl-based monomer copolymerizable with an aromatic vinyl compound, (C) an aromatic vinyl compound or an aromatic vinyl compound and an aromatic vinyl compound. Polymer obtained by copolymerizing copolymerizable vinyl monomer 0 to 45% by weight, total of (A) + (B) + (C) 100
3 to 45 parts by weight of (D) flame retardant, (E) 3 with respect to parts by weight.
A flame-retardant resin composition comprising 0.05 to 15 parts by weight of an ester of a divalent alcohol and a saturated aliphatic monocarboxylic acid is provided. Hereinafter, the present invention will be described in detail. Examples of the (A) component aromatic polycarbonate of the present invention include those obtained by the reaction of various dihydroxyaryl compounds with phosgene, and those obtained by the transesterification reaction of the dihydroxyaryl compound with diphenyl carbonate. A typical example is a polycarbonate obtained by the reaction of 2,2'-bis (4-hydroxyphenyl) propane and phosgene. Examples of the dihydroxyaryl compound as a raw material for polycarbonate include bis (4-hydroxyphenyl)
Methane, 1,1'-bis (4-hydroxyphenyl) ethane, 2,2'-bis (4-hydroxyphenyl) propane, 2,2'-bis (4-hydroxyphenyl) butane, 2,2'-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane,
2,2'-bis (4-hydroxy-3-methylphenyl) propane, 2,2'-bis (4-hydroxy-3-)
Tert-Butylphenyl) propane, 2,2'-bis (4-
Hydroxy-3-bromophenyl) propane, 2,2 '
-Bis (4-hydroxy-3,5-dichlorophenyl)
Propane, 1,1'-bis (4-hydroxyphenyl)
Cyclopentane, 1,1'-bis (4-hydroxyphenyl) cyclohexane, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether, 4,4'-dihydroxyphenyl sulfide, 4 , 4'-dihydroxy-3,3 '
-Dimethyl phenyl sulfide, 4,4'-dihydroxyphenyl sulfide, 4,4'-dihydroxy-3,
3'-dimethylphenyl sulfide, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethylphenyl sulfoxide, 4,
There are 4'-dihydroxyphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, hydroquinone, resorcin, and the like, and these are used alone or in combination of two or more. Particularly preferred is 2,2 '
-Bis (4-hydroxyphenyl) propane {bisphenol A}. The amount of the component (A) used in the present invention is 45 to 97% by weight in the components (A) + (B) + (C),
Preferably 50 to 95% by weight, more preferably 55 to
90% by weight, particularly preferably 60 to 85% by weight.
If the amount used exceeds 97% by weight, the moldability will be poor and
If it is less than wt%, flame retardancy and impact resistance are poor, which is not preferable.

The graft polymer as the component (B) of the present invention is usually a graft polymer obtained by graft-polymerizing a vinyl monomer such as an aromatic vinyl compound in the presence of the rubbery polymer (b). Examples of the rubbery polymer (b) include polybutadiene, butadiene-styrene copolymer, polyisoprene, butadiene-acrylonitrile copolymer, ethylene-propylene- (diene) copolymer, ethylene-butene-1- (diene. ) Copolymer, isobutylene-isoprene copolymer, acrylic rubber, styrene-butadiene-
Examples thereof include styrene block copolymers, styrene-isoprene-styrene block copolymers, hydrogenated diene-based (block, random and homo) polymers such as SEBS, polyurethane rubber and silicone rubber. Among them, polybutadiene, butadiene-styrene copolymer, ethylene-propylene- (diene) copolymer, hydrogenated diene polymer and silicone rubber are preferable.
Examples of the aromatic vinyl compound include styrene, α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, α-ethylstyrene, methyl-α-methylstyrene, dimethylstyrene, monobromostyrene, dibromo. Examples include styrene, tribromostyrene, chlorostyrene and dichlorostyrene. Of these, styrene, α-methylstyrene and p-methylstyrene are preferred. Other vinyl-based monomers copolymerizable with the aromatic vinyl compound include vinyl cyanide compounds, (meth) acrylic acid esters, acid anhydride-based monomers, and maleimide-based monomers. Examples of the vinyl cyanide include acrylonitrile,
Examples thereof include methacrylonitrile. Of these, acrylonitrile is preferred. Examples of the (meth) acrylic acid ester include methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, butyl methacrylate and the like. Of these, methyl methacrylate is preferred. Maleic anhydride is preferable as the acid anhydride monomer. Examples of the maleimide-based monomer include maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-isopropylmaleimide, N-phenylmaleimide, N-cyclohexylmaleimide, N-
(P-hydroxyphenyl) maleimide and the like can be mentioned. Of these, maleimide and N-phenylmaleimide are preferred. It may be a copolymer obtained by a method in which maleic anhydride or the like is copolymerized in place of the copolymerization of the maleimide-based monomer, and the comonomer is imidized. The content of the rubbery polymer in the above graft polymer is preferably 5 to
It is 80% by weight, more preferably 10 to 65% by weight. The graft ratio is preferably 5 to 200%, more preferably 10 to 150%. The intrinsic viscosity [η] of the methyl ethyl ketone soluble component is preferably 0.1 to
1.2 dl / g, more preferably 0.2-0.8 dl
/ G. Here, the graft ratio means the ratio of the monomer component directly graft-bonded to the rubber-like polymer to the amount of rubber in the graft. This graft ratio is the amount of polymerization initiator,
It can be controlled by the polymerization temperature and the like. The intrinsic viscosity can be controlled by the method of adding the monomer, the amount of the molecular weight modifier used, and the like. Further, the polymerization method may be a floating polymerization method, a solution polymerization method, a bulk polymerization method, a suspension polymerization method, or a combination of these polymerization methods. The amount of the component (B) used in the present invention is (A) + (B) +
It is 3 to 60% by weight, preferably 4 to 50% by weight, more preferably 5 to 40% by weight, and particularly preferably 5 to 35% by weight in the component (C). If the amount used exceeds 60% by weight, the flame retardancy is inferior, and if it is less than 3% by weight, the moldability is inferior, which is not preferable.

As the aromatic vinyl compound used as the component (C) of the present invention, all of the above-mentioned compounds can be mentioned.
Of these, styrene is preferred. Examples of vinyl monomers copolymerizable with an aromatic vinyl compound include the vinyl cyanide compounds, (meth) acrylic acid esters, acid anhydride monomers, and maleimide monomers. Of these, acrylonitrile is preferred. The intrinsic viscosity [η] of the methyl ethyl ketone soluble component of the above polymer is
It is preferably 0.1 to 1.2 dl / g, and more preferably 0.2 to 0.8 dl / g. (C) in the present invention
The amount of the component used is 0 to 4 in the components (A) + (B) + (C).
It is 5% by weight, preferably 0-40% by weight, more preferably 2-35% by weight, particularly preferably 5-30% by weight. If the amount used exceeds 45% by weight, the impact resistance becomes poor, which is not preferable.

As the flame retardant of the component (D) of the present invention, those used as flame retardants of polymers such as general rubbers and resins can be used. Examples thereof include halogen-containing compounds and phosphorus. Examples of the compound include silicon-containing compounds. Specific examples of the halogen-containing compound include tetrabromobisphenol A, tetrabromobisphenol A-bis (2-hydroxyethyl ether), and tetrabromobisphenol A-bis (2,3-).
Tetrabromobisphenol A derivative such as dibromopropyl ether), hexabromodiphenyl ether,
Octabromodiphenyl ether, decabromodiphenyl ether, bis (tribromophenoxy) ethane, hexabromocyclododecane and the like can be mentioned.
Further, at least one selected from the group consisting of monobromophenol, tribromophenol, pentabromophenol, tribromocresol, dibutyromomopropylphenol, tetrabromobisphenol S, cyanuric chloride or the like and the above halogen compounds. An oligomer type halogen compound obtained by copolymerizing with a halogen compound of a kind is mentioned. Further, a polycarbonate oligomer of tetrabromobisphenol A, a polycarbonate oligomer of tetrabromobisphenol A and bisphenol A, a polycarbonate oligomer of tetrabromobisphenol S, a polycarbonate oligomer of tetrabromobisphenol S and bisphenol S, and the like can be given. Further, halogenated epoxy oligomers represented by the following general formula (2) are also included.

[0006]

Embedded image

(In the general formula (2), m is an average degree of polymerization represented by an integer of 1 to 100, X is the same or different and represents a hydrogen atom, a chlorine atom or a bromine atom,
i, j, k, and p are each an integer of 1 to 4, and R
And R'are the same or different and each is a group represented by the following general formula (3) or formula (4). )

[0008]

Embedded image

[0009]

[Chemical 4]

(In the general formula (4), Y is a hydrogen atom,
It represents a bromine atom or a chlorine atom, and q is an integer of 0 to 5. Examples of the phosphorus-containing compound include organic phosphoric acid-containing compounds, red phosphorus, phosphazene-based compounds, and ammonium polyphosphate. Among these, examples of the organic phosphorus-containing compound include phosphates typified by triphenyl phosphate and phosphites typified by triphenyl phosphite. These organic phosphorus-containing compounds may be used alone or in combination of two or more. In the present invention, triphenyl phosphate, trithiophenyl phosphate, trixylenyl phosphate, trixylenyl thiophosphate, hydroquinone bis (diphenyl phosphate), resorcinol bis (diphenyl phosphate) and the like are preferable as the organic phosphorus-containing compound. Further, examples of the above-mentioned silicon-containing compound include general organosiloxanes, and specific examples thereof include silicone oils, silicone resins, organic silane compounds, and polysilanes. Further, aluminum silicate, sodium silicate, silicon dioxide and the like are also included. These flame retardants (D) are
They can be used alone or in combination of two or more. If necessary, tetrafluoroethylene powder can be used in combination with the component (D). The amount of the component (D) used in the present invention is 3 to 45 parts by weight, preferably 4 to 40 parts by weight, and more preferably 5 to 35, based on 100 parts by weight of the total of the components (A) + (B) + (C). Parts by weight, particularly preferably 6 to 30 parts by weight. (D) component is 45
If it exceeds 5 parts by weight, the impact resistance is poor, and if it is less than 3 parts by weight, the flame retardancy is poor. An antimony-containing compound can be used to improve the flame retardant effect of the flame retardant (D). The preferable amount used for obtaining the flame retardancy improving effect is (A)
+ (B) + (C) components to a total of 100 parts by weight of 0.
It is 5 to 20 parts by weight, more preferably 1 to 15 parts by weight. Further, examples of the antimony content include antimony trioxide, antimony tetraoxide, (colloidal) antimony pentoxide, sodium antimonate and antimony phosphate, among which antimony trioxide is preferable.

As the ester of the trihydric alcohol of the component (E) of the present invention and the saturated aliphatic monocarboxylic acid, one or more kinds of trihydric alcohols of the C _{10 to} C ₃₄ saturated aliphatic monocarboxylic acid are preferable. Or an ester of a trihydric alcohol and the above aliphatic monocarboxylic acid to increase the molecular weight, using a dicarboxylic acid in an amount of 30 to 60 mol% based on the total molar amount of the carboxylic acid ester The compound which did is mentioned. Here, examples of the trihydric alcohol include glycerin, trimethylpropanol, and hexanetriol. Of these, glycerin and trimethylpropanol are preferable. Also, C ₁₀ ~
Examples of the C ₃₄ saturated aliphatic monocarboxylic acid include capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristyrene acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, nonadecanoic acid, eicosanoic acid, arachidic acid, and Examples thereof include montanic acid. Among these, stearic acid and montanic acid are preferable. Furthermore, examples of the dicarboxylic acid include oxalic acid, malonic acid, adipic acid, sebacic acid, undecanedioic acid, dodecanoic acid, brassic acid, and tabsinic acid. Of these, adipic acid is preferred. Typical examples of the component (E) include an ester of glycerin and a C _{10 to} C ₃₄ saturated aliphatic carboxylic acid described in claim 2 or a high number average molecular weight of 1000 to 4000 described in claim 3. There is a compound having a molecular weight, glycerin monostearate, which is an ester of glycerin and stearic acid, is a typical example of the former, and a typical example of the latter is montan in which an ester of trimethylpropanol and montanic acid is polymerized with adipic acid. Acid ester ( ^R Hostalub VP W manufactured by Hoechst)
E40 average molecular weight 2000). The carboxylic acid ester to be used in the present invention is prepared by a known method, for example, pyridine as an acid binder according to the method of Einhorn, from an alcohol and an acid salt compound in an inert solvent, or from an esterification catalyst such as p-toluenesulfonic acid. It is carried out with or without an alcohol and an acid in a solvate. The amount of the component (E) used in the present invention is 100 in total of the components (A) + (B) + (C).
0.05 to 15 parts by weight, preferably 0.
The amount is 1 to 10 parts by weight, more preferably 0.2 to 7 parts by weight, and particularly preferably 0.3 to 5 parts by weight. If the amount used exceeds 15 parts by weight, the flame retardancy and the appearance of the molded product deteriorate, and
If it is less than 05 parts by weight, the generation of burnt foreign matter cannot be suppressed in long-term continuous molding.

The flame-retardant resin composition of the present invention contains glass fiber, carbon fiber,
Fillers such as metal fibers, glass beads, wollastonite, rock filler, calcium carbonate, talc, mica, glass flakes, kaolin, barium sulfate, graphite, molybdenum disulfide, magnesium oxide, zinc oxide whiskers, potassium titanate whiskers, etc. They can be used alone or in combination. Among these fillers, those having a fiber diameter of 6 to 60 μm and a fiber length of 30 μm or more are preferable as the shape of glass fiber and carbon fiber. These fillers are usually used in the range of 2 to 150 parts by weight with respect to 100 parts by weight of the composition of the present invention. Further, the composition of the present invention may contain known additives such as colorants, lubricants, antistatic agents, weathering (light) agents, antioxidants, plasticizers and antibacterial / antifungal agents. Further known other polymers depending on the required performance, such as polyamide, polybutylene terephthalate, polyethylene terephthalate,
Polypropylene, polyethylene, polysulfone, polyphenylene sulfide, polyvinylidene fluoride, polyamide elastomer, polyester elastomer, polyphenylene ether, polycaprolactone, polyarylate and the like can be appropriately blended and used. The composition of the present invention can be obtained by kneading each component using various extruders, Banbury mixers, kneaders, rolls and the like. A preferred manufacturing method is a method using an extruder, and examples of the extruder include a single-screw extruder and a twin-screw extruder. Moreover, when kneading each component, you may knead all components collectively, and you may knead them by a multistage addition system. The flame-retardant resin composition of the present invention thus obtained, injection molding, sheet extrusion, vacuum molding, profile extrusion,
It can be molded into various molded products by injection pressing, foam molding, blow molding and the like.

The present invention will be specifically described below with reference to examples. In the examples, parts and% are by weight unless otherwise specified. Further, various evaluations in the examples are values measured as follows. [Combustion test] Flame retardancy: Observe the combustion state after contacting the test piece, and
It was judged by. X: Continued to burn O: Disappeared spontaneously [Izod impact strength] ASTM D256 1/4 ", measured at 23 ° C with a notch. [Moldability] Flowability: 240 ° C according to ASTM D1238, load 10 kg [Molded product appearance] The surface appearance of the test piece was visually evaluated by ○ × ○: Beautiful mirror surface ×: Defects such as black streaks are observed [Long-term continuous moldability] 5 oz injection molding machine At 10,000
After continuously molding for 0 shots, 100 test pieces were molded, and the amount of burned foreign matter in the test pieces was visually judged. ◯: Burnt foreign matter is present in 0 to 1 of 100 sheets. Δ: Burned foreign matter is present in 2 to 5 sheets of 100 sheets. ×: Burnt foreign matter is present in 6 or more sheets of 100 sheets. Component (A) of the present invention (A) As a component), a polycarbonate having a viscosity average molecular weight of 21,000 obtained by condensation polymerization of bisphenol A and phosgene was used. Component (B) rubber polymer of the present invention b-1 to b-3 As the rubber polymer used for the component (B) of the present invention, those shown in Table 1 were used.

[0014]

[Table 1]

Polymers B-1 to B-4 Resins obtained by graft polymerization of various monomers in the presence of the above rubbery polymer were obtained. The compositions of these polymers are shown in Table 2.

[0016]

[Table 2]

The specific method of determining the graft ratio is to first add 2 g of the graft polymer to room temperature methyl ethyl ketone and sufficiently stir to determine the insoluble content (W). On the other hand, the amount (R) of the rubbery polymer in the insoluble matter (W) can be calculated based on the polymerization prescription, and the graft ratio is calculated from the following formula. Graft ratio (% by weight) = {(W−R) / R} × 100 The intrinsic viscosity [η] was measured at 30 ° C. by using a Webrohde viscometer with methyl ethyl ketone as a solvent. Component (C) of the Present Invention As the component (C) of the present invention, a polymer obtained by copolymerizing 76 parts by weight of styrene and 24 parts by weight of acrylonitrile was used. The intrinsic viscosity [η] of the present polymer is 0.40. Component (D) of the Present Invention The following flame retardant was used as the component (D) of the present invention. D-1: Halogenated epoxy oligomer represented by the general formula (2) having a weight average molecular weight of 5,000 D-2: Organophosphorus compound triphenyl phosphate flame retardant auxiliary agent I used one. Flame Retardant Aid-1: Antimony Trioxide Flame Retardant Auxiliary-2: Tetrafluoroethylene Powder by Hoechst Hostaflon ^R Hostaflon TF1620 Component (E) of the Present Invention As component (E) of the present invention, the following E-1, E-2 was used. E-1: Glycerin monostearate ( ^R- Rikemal S-100A manufactured by Riken Vitamin Co., Ltd.) E-2: Montanate ester having an average molecular weight of 2,000 ( ^R Hostaflon VP WE40 manufactured by Hoechst Co.) Also, as a lubricant used in Comparative Examples. E-3 and E-4 were used. E-3: Montanic acid ester of dihydric alcohol ( ^R Hoechst Wax E manufactured by Hoechst) E-4: Polyethylene wax (Sun Wax E-250P manufactured by Sanyo Kasei Co., Ltd.)

Examples 1 to 10 and Comparative Examples 1 to 14 Preparation of Flame Retardant Resin Composition The above components were mixed according to the formulation shown in Table 3, melt-kneaded and pelletized using a twin-screw extruder. The obtained pellets were dried to a water content of 0.05% or less, molded using an injection molding machine at a molding temperature of 200 to 240 ° C. to prepare test pieces, and their physical properties were evaluated.

[0019]

[Table 3]

Comparative Example 1 is an example in which the amount of the component (A) used is outside the range of the present invention, and the flame retardancy and impact resistance are poor. Comparative Example 2 has a large amount of the component (A) used outside the scope of the present invention,
This is an example in which the amount of the component (B) used is small outside the range of the present invention, and the moldability is poor. Comparative Example 3 is an example in which the amount of the component (A) used is small outside the range of the present invention and the amount of component (B) used is large outside the range of the present invention, and the flame retardancy is poor. In Comparative Example 4, the amount of the component (A) used was small outside the range of the present invention, and (C)
This is an example in which the amounts of the components used are outside the scope of the present invention, and the flame retardancy and impact resistance are poor. Comparative Examples 5 and 7 are examples in which the amount of the component (D) used is outside the range of the present invention and the flame retardancy is poor. Comparative Examples 6 and 8 are examples in which the amount of the component (D) used is large outside the range of the present invention, and the impact resistance is poor. Comparative Example 9
And Comparative Example 11 are examples in which the amount of the component (E) used is small outside the range of the present invention and the long-term continuous moldability is poor. Comparative Example 10
And Comparative Example 12 are examples in which the amount of the component (E) used is outside the range of the present invention, and the flame retardancy and the appearance of the molded product are poor. Comparative Example 13
Is an example in which a montanic acid ester of a monohydric alcohol outside the scope of the present invention is used as the component (E), and the long-term continuous moldability is poor. Comparative Example 14 is an example in which a polyethylene wax outside the scope of the present invention was used as the component (E), and the long-term continuous moldability was poor.

[0021]

The flame-retardant resin composition of the present invention is flame-retardant,
Excellent in impact resistance, moldability, surface appearance of molded products, low metal adhesion with less burning foreign substances even in long-term continuous molding, various parts for OA equipment related fields, housings, chassis, various home appliances It is useful for parts, housings, sundries, interior and exterior parts in the field of automobiles, etc., and is particularly useful for parts that are continuously molded for a long time using a hot runner.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location C08L 51/04 LKY C08L 51/04 LKY (72) Inventor Hisao Nagai 2-11-24 Tsukiji, Chuo-ku, Tokyo Within Nippon Synthetic Rubber Co., Ltd.

Claims (3)

[Claims] 1. (A) Aromatic polycarbonate 40 to 9
Obtained by graft polymerization of an aromatic vinyl compound or an aromatic vinyl compound and a vinyl monomer copolymerizable with the aromatic vinyl compound in the presence of 7% by weight of (B) the rubbery polymer (b). Graft polymer 3 to 60% by weight,
(C) 0 to 45% by weight of an aromatic vinyl compound or a polymer obtained by copolymerizing an aromatic vinyl compound and an aromatic vinyl compound and a vinyl monomer copolymerizable with the aromatic vinyl compound, (A) +
(B) + (C) 100 parts by weight in total, (D) flame retardant 3 to 45 parts by weight, (E) trihydric alcohol and ester of saturated aliphatic monocarboxylic acid 0.05 to 15 parts by weight A flame-retardant resin composition obtained by blending. 2. The flame-retardant resin composition according to claim 1, wherein the component (E) according to claim 1 is an ester of glycerin and a C _{10 to} C ₃₄ saturated fatty acid monocarboxylic acid. 3. The component (E) according to claim 1 is represented by formula (1) and has a number average molecular weight of 1,000 to 4,000.
The flame-retardant resin composition according to claim 1, which is a compound that is Embedded image (In the general formula (I), R ₁ , R ₂ , R ₃ and R ₄ each represent a C _{10 to} C ₃₄ alkyl group, and R ₅ represents C ₁ to C ₃₄
Represents ₁₈ alkyl groups. Further, n is an integer of 1 or 2. )