JPH10101940A - Flame retardant thermoplastic resin composition and flame retardant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant thermoplastic resin composition having excellent flame retardancy, light resistance, and thermal stability at the time of molding, and excellent light resistance to a thermoplastic resin. And a flame retardant that imparts flame retardancy and thermal stability during molding. [Structure] A thermoplastic resin (A) is blended with a halogenated epoxy resin flame retardant (B) in which a terminal epoxy group of a bisphenol A type epoxy resin is made into a 5-membered ring carbonate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a flame-retardant thermoplastic resin composition having excellent flame retardancy and light resistance, and more particularly to a composition having excellent heat stability during molding. The present invention relates to a flame retardant useful for imparting flame retardancy, light resistance, and thermal stability during molding to a thermoplastic resin.

[0002]

2. Description of the Related Art Conventionally, flame retardancy of thermoplastic resins such as styrene resin and polyester resin has been disclosed in, for example, JP-A-50-27843 and JP-A-53-74557.
In JP-A-2005, a flame retardant composed of a halogenated bisphenol A type epoxy resin having excellent low volatility, low bleeding property, heat resistance and the like, and a flame retardant auxiliary such as antimony trioxide are added and blended if necessary. Techniques are disclosed.

[0003] However, the flame-retardant thermoplastic resin composition using these flame retardants has a strong adhesive property to the metal part of the molding machine, so that the screw or cylinder of the molding machine or the hot roll is required. There is a defect that the composition adheres to, for example, burned foreign substances and gels of the composition, and the resulting molded article has poor appearance, and has a problem in thermal stability during molding.

Therefore, as a technique for improving the thermal stability at the time of molding, for example, JP-A-61-241322 and JP-A-62-4737 disclose flame retardancy of a styrene resin. Each of the techniques using a flame retardant comprising a compound in which an epoxy group of a bisphenol A type epoxy resin is blocked and modified with a halogenated phenol compound such as tribromophenol is disclosed.

[0005] Further, as a technique for suppressing the adhesion of metal at the time of molding to prevent the occurrence of burnt foreign matters and improving the appearance defect of a molded product, for example, JP-A-4-348167 and JP-A-5-117463 are disclosed. The publication discloses a flame retardant having a structure in which an epoxy group of a halogenated bisphenol-type epoxy resin is blocked with a long-chain aliphatic carboxylic acid in order to suppress metal adhesion with respect to flame retardancy of a polyester resin or a styrene resin. The technology used is disclosed.

[0006]

However, the flame retardants described in the above-mentioned JP-A-61-241322 and JP-A-62-4737 have some improvement in thermal stability during molding. However, it is not yet sufficient, and has a problem that light resistance is inadequate for OA equipment housing materials, which have strict light resistance requirements, because the light resistance is inferior to that of a flame retardant having an epoxy group. Was.

Further, the flame retardants described in the above-mentioned JP-A-4-348167 and JP-A-5-117463 may be used when a polyester-based resin or a polystyrene-based resin is made flame-retardant. Although the adhesion is improved to some extent, in the long-time molding process, the appearance of the molded product is deteriorated due to the incorporation of burnt foreign matter into the molded product.
After all, sufficient heat resistance could not be obtained.

An object of the present invention is to provide a flame-retardant thermoplastic resin composition having excellent flame retardancy, light resistance and thermal stability during molding, and a thermoplastic resin. An object of the present invention is to provide a flame retardant which provides excellent light resistance, flame retardancy and thermal stability during molding.

[0009]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, blended a halogenated epoxy resin flame retardant having a 5-membered ring carbonate group in the molecule with a thermoplastic resin. Excellent flame retardancy,
The inventors have found that a flame-retardant thermoplastic resin composition having both light resistance and thermal stability during molding can be obtained, and have completed the present invention.

Hereinafter, the components of the composition of the present invention will be described in detail. A flame-retardant thermoplastic resin composition comprising, as essential components, a thermoplastic resin (A) and a halogenated epoxy resin-based flame retardant (B) having a 5-membered carbonate group in a molecule; and The present invention relates to a flame retardant comprising, as an essential component, a halogenated epoxy resin having a 5-membered ring carbonate group in a molecule.

The main component of the flame retardant of the present invention, that is, the halogenated epoxy resin-based flame retardant used as the component (B) in the flame-retardant thermoplastic resin composition of the present invention, includes a halogenated epoxy resin molecule. Having a five-membered ring carbonate group. That is, by having such a structure, superior flame retardancy, light resistance, and thermal stability at the time of molding can be improved as compared with a conventional halogenated epoxy resin-based flame retardant.

Here, the content of the 5-membered ring carbonate in the halogenated epoxy resin is not particularly limited, but since the effect of the present invention is remarkable, the 5-membered ring carbonate per 1 mol of the halogenated epoxy resin is used. Carbonate average 1 ~
Preferably it is 2 moles.

The halogenated epoxy resin flame retardant having a 5-membered ring carbonate group in the molecule is derived from, for example, the following halogenated epoxy resin.

As the halogenated epoxy resin, halogenated bisphenol type epoxy resin, halogenated phenol novolak type epoxy resin, halogenated cresol novolak type epoxy resin, halogenated resorcinol type epoxy resin, halogenated hydroquinone type epoxy resin, halogenated bisphenol A novolak type epoxy resin, halogenated methyl resorcinol type epoxy resin, halogenated resorcinol novolak type epoxy resin, and the like. Among them, it is preferable to use a halogenated bisphenol-type epoxy resin because of its high halogen content and excellent heat resistance.

The above-mentioned halogenated bisphenol type epoxy resin is obtained from a low molecular weight to a high molecular weight by a condensation reaction between a halogenated bisphenol and epihalohydrin or a polyaddition reaction between a diglycidyl ether of the halogenated bisphenol and a halogenated bisphenol. Is usually used in the presence of various molecular weights.

Here, specific examples of the halogenated bisphenol are not particularly limited, but usually, dibromobisphenol A, tetrabromobisphenol A, dichlorobisphenol A, tetrachlorobisphenol A, dibromobisphenol F, tetrabromobisphenol F, dichlorobisphenol F, tetrachlorobisphenol F, dibromobisphenol S, tetrabromobisphenol S, dichlorobisphenol S, tetrachlorobisphenol S, and the like.

The halogenated epoxy resin described above may have a structure in which a part of the epoxy group in the compound is blocked by a compound containing a functional group capable of reacting with the epoxy group.

Here, the functional group of the blocking compound capable of reacting with the epoxy group is not particularly limited, and is a functional group having active hydrogen or a functional group capable of ring-opening addition reaction of an epoxy group such as an acid anhydride group. Examples thereof include a carboxyl group, an acid anhydride group, a hydroxyl group such as alcohols, phenols and phosphoric acids, an amino group, an imino group, an acid amide group, an acid imide group, a thiol group, and an isocyanate group. .

Further, the compound having a functional group is preferably a halogenated compound from the viewpoint of increasing the halogen content of the flame retardant, and specifically, for example, dibromophenol, dibromocresol, tribromophenol, Halogenated phenols such as pentabromophenol, dichlorophenol, dichlorocresol, trichlorophenol and pentachlorophenol are preferred.
Of these, tribromophenol and pentabromophenol are preferred because of their excellent flame retardancy.

On the other hand, the method for introducing a 5-membered ring carbonate group into the halogenated epoxy resin is not particularly limited, but may be carried out in a solvent or without solvent in the presence of a catalyst such as a quaternary ammonium salt or an alkali metal halide. Under normal pressure or under pressure, the reaction temperature is from room temperature to 180 ° C, preferably 4 ° C.
By performing the reaction at 0 to 140 ° C. and reacting the epoxy group with carbon dioxide, the epoxy group is converted into a carbonate group. From the low molecular weight or high molecular weight substance having the epoxy group, the corresponding 5-membered ring carbonate group is formed. Can be obtained.

Further, taking a halogenated bisphenol A type epoxy resin as an example of the halogenated epoxy resin, it can be specifically produced by the following method.

That is, the condensation reaction of halogenated bisphenol A with epichlorohydrin or the addition reaction of diglycidyl ether of halogenated bisphenol A obtained by the condensation reaction with halogenated bisphenol A is carried out in the presence of a catalyst to give halogenated bisphenol A. Obtain a mold epoxy resin. Next, a compound having a five-membered ring carbonate group by reacting a part or all of the epoxy group of the epoxy resin with carbon dioxide in the presence of a catalyst by using the above-described method of converting an epoxy group to a carbonate group. There is a method of obtaining.

Examples of the halogenated epoxy resin in which a compound having a structure in which a part of the epoxy group of the halogenated bisphenol A type epoxy resin is blocked with a halogenated phenol are used. For example, halogenated bisphenol A and epichlorohydrin To obtain a diglycidyl ether of halogenated bisphenol A, followed by an addition reaction of the halogenated bisphenol A and a halogenated phenol necessary to block a part of the epoxy group to the glycidyl ether in the presence of a catalyst. obtain. Next, there is a method in which an epoxy group of the epoxy resin is almost quantitatively reacted with carbon dioxide in the presence of a catalyst to obtain a compound having a 5-membered carbonate group. The amount of the halogenated phenol used is not particularly limited, but is preferably 0.1 to 0.9 mol, more preferably 0.3 to 0.9 mol, of the hydroxyl group of the halogenated phenol per mol of the epoxy group of the halogenated epoxy resin.
0.7 mol is preferable in that the balance between flame retardancy, light resistance and thermal stability is improved.

The reaction temperature of the epoxy resin conversion is 100 to 22.
The temperature is 0 ° C., preferably 120 to 200 ° C., and a reaction solvent can be appropriately used as needed.

Examples of the catalyst used in the reaction for forming an epoxy resin include alkali metal hydroxides such as sodium hydroxide, tertiary amines such as dimethylbenzylamine,
Imidazoles such as ethyl-4-methylimidazole; quaternary ammonium salts such as tetramethylammonium chloride; phosphonium salts such as ethyltriphenylphosphonium iodide; and phosphines such as triphenylphosphine.

The halogenated bisphenol A type epoxy resin having a 5-membered ring carbonate group in the molecule thus obtained is preferably, for example, one represented by the following general formula (1).

General formula (1)

[0028]

Embedded image (Where T1 is

[0029]

Embedded image And T2 is

[0030]

Embedded image

[0031]

Embedded image Or

[0032]

Embedded image (In the general formula (1), X is a halogen atom, i and j are 1 to 4
, K is an integer of 1 to 5, n is an average degree of polymerization of 0 to 40.
R 1 represents a hydrogen atom, a methyl group or an ethyl group, and R 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. )

The flame retardant of the present invention described in detail can impart an excellent flame retardant effect to a thermoplastic resin or a thermosetting resin. Here, examples of the thermosetting resin include an epoxy resin, a phenol resin, and a polyurethane resin. Among them, it is preferable to use a thermoplastic resin, that is, a flame-retardant thermoplastic resin composition of the present invention described in detail below, since the effects of the present invention become remarkable.

The flame-retardant thermoplastic resin composition of the present invention is obtained by blending the halogenated epoxy resin-based flame retardant having a 5-membered ring carbonate group as the component (B) with the thermoplastic resin (A). It is.

The amount of the halogenated epoxy resin-based flame retardant (B) used in the composition of the present invention is not particularly limited, but is preferably contained in a proportion of 1 to 30% by weight in the composition. Above all, it is 2 to 30 in that there is little decrease in properties such as flame retardancy, light resistance, thermal stability and impact strength.
% By weight is preferred.

The thermoplastic resin (A) used in the flame-retardant thermoplastic resin composition of the present invention is not particularly limited. Examples thereof include polystyrene, polymethylstyrene, rubber-modified polystyrene (HIPS), Acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-acryl rubber-styrene copolymer (A
AS resin), styrene resin such as acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin), alloy of ABS resin and polycarbonate, alloy of ABS resin and polyester resin, alloy of ABS resin and polyamide resin, and polystyrene. A polymer alloy containing a styrene resin such as an alloy of polyphenylene oxide as one component, further, polyethylene terephthalate (PET), polybutylene terephthalate (PBT),
Polyester resins such as polyhexamethylene terephthalate, polyethylene naphthalenedicarboxylate, polybutylene naphthalenedicarboxylate and polyhexamethylene naphthalenedicarboxylate; olefin resins such as polyethylene, polypropylene and polybutene; nylon 6, nylon 66, nylon 46 And polyamide alloys such as polyphenylene oxide, polycarbonate (PC), and a polymer alloy of a polycarbonate resin and a polyamide resin. HIP is used in view of the effects of improving the compatibility with the flame retardant, the metal adhesion, and the thermal stability.
S, ABS resin, PBT, polyamide resin, and AB
Polymer alloys such as alloys of S resin and PC, and alloys of PBT and PC are preferred.

The ABS resin used is preferably a rubber component content of 5 to 25% by weight, an acrylonitrile-styrene (AS) copolymer content of 75 to 94% by weight, and an acrylonitrile (AN) content in the AS copolymer. Those having a composition of 20 to 30% by weight are preferred in view of the improvement effect.

Further, it is preferable to add a flame retardant aid (D) to the composition of the present invention in order to enhance the flame retardant effect.
Examples of the flame retardant aid (D) include antimony compounds such as antimony trioxide, antimony tetroxide and antimony pentoxide, tin compounds such as tin oxide and tin hydroxide, molybdenum compounds such as molybdenum oxide and ammonium molybdate. Compounds, zirconium oxide, zirconium-based compounds such as zirconium hydroxide, zinc borate, boron-based compounds such as barium metaborate, silicon oil, silane coupling agents, silicon-based compounds such as high molecular weight silicon, chlorinated polyethylene and the like Can be

These flame retardant auxiliaries (D) preferably have a content of 0.5 to 10% by weight in the composition of the present invention.
-6% by weight is more preferred. When the content is 0.5% by weight or more, the flame retardancy is remarkably improved, and when the content is 10% by weight or less, properties such as impact resistance and thermal stability are further improved.

The flame-retardant thermoplastic resin composition of the present invention is prepared, for example, by blending a predetermined amount of each of the above-mentioned components, using a Henschel mixer,
It can be manufactured by preliminarily mixing with a mixer such as a tumbler mixer and then melt-kneading with an extruder, a kneader, a hot roll, a Banbury mixer or the like.

The composition of the present invention may contain other flame retardants as long as the effects of improving light resistance and thermal stability are not significantly impaired. Agents, release agents, lubricants, lubricants, coloring agents such as dyes and pigments, plasticizers, crystallization accelerators, crystal nucleating agents, antistatic agents, fillers,
A foaming agent, a heat stabilizer, an antioxidant, a reinforcing material such as glass fiber, carbon fiber, and aramid fiber can be blended.

[0042]

EXAMPLES The present invention will be described more specifically with reference to examples and comparative examples, but the scope of the present invention is not limited to these examples. In the examples, all parts and percentages are based on weight, and the evaluation of various tests is based on the following measurement methods.

(1) Test of softening point (ring and ball type) Measured according to JIS K-7234. (2) Test of epoxy equivalent It was measured according to JIS K-7236. (3) Flammability test (UL-94) Subject 9 of Underwriters Laboratories
5 inches long x 1 width based on the No. 4 vertical combustion test method
The measurement was performed using five test pieces each having a size of ２ inch and a thickness of ８ inch.

(4) Light Resistance Test Light irradiation was performed using a xenon fade meter,
The discoloration of the test piece after 0 hour was measured using a color difference meter, and the difference from the non-irradiated test piece was expressed as ΔE.

Test conditions Test equipment: Atlas Ci35A Light source / output: Xenon arc lamp 0.3 W / m 2 Filter type: Inside borosilicate / Outside soda lime Black panel temperature: 55 ° C. Relative humidity: 55%

(5) Test of Thermal Stability The thermal stability during molding was evaluated by putting the flame-retardant resin composition into an injection molding machine and repeating injection molding continuously. The measurement was performed by measuring the number of times of injection molding until discoloration and foreign matter contamination were observed in the appearance. Specifically, a well-dried pellet of the flame-retardant resin composition is poured from a popper into a 5-ounce injection molding machine equipped with a mold capable of molding a disc-shaped molded product (outer diameter 100 mm × thickness 3 mm). Injection molding is repeated, and the appearance of the obtained molded product is visually observed and observed with a loupe (× 10), and the number of times of injection molding until discoloration and foreign matter are continuously generated is determined. The stability was evaluated. (It indicates that the greater the number of times of the limit injection molding, the better the thermal stability.) In this test, the discoloration refers to a case where the surface of the molded article is all colored brown.

The term "contamination of foreign matters" refers to the case where there are 10 or more foreign substances of 1.0 mm ² or more on one surface of the molded product.
The thermal stability was evaluated according to the following ranks. Judgment Limit number of injection moldings ：: 500 times or more, no problem in practical use ○: 300 to less than 500 times, no problem in short-term use △: 100 to less than 300 times, practical, difficult to use ×: less than 100 times The molding conditions are as follows.

Cylinder temperature: Set to 250 ° C. for HIPS, ABS resin, ABS / PC polymer alloy. Set to 260 ° C. for PBT, PBT / PC polymer alloy, polyamide resin. Injection pressure: 500 to 1500 kg / Cm ² Mold temperature: 60 to 80 ° C Injection time / cooling time: 10 seconds / 20 seconds

Synthesis Example 1 (Synthesis of halogenated epoxy resin) Diglycidyl ether of tetrabromobisphenol A [EPICLON15 manufactured by Dainippon Ink and Chemicals, Inc.
2, epoxy equivalent 360 g / eq, bromine content 48%]
720.0 g and tetrabromobisphenol A (hereinafter T
BA) and 150.0 g of 2,4,6-tribromophenol (hereinafter abbreviated as TBP) were placed in a 1-liter stainless steel separable flask equipped with a thermometer and a stirrer, and the inside was filled with nitrogen. After replacing with gas, the contents are heated and melted, and 10% of sodium hydroxide at 100 ° C.
After adding 1.3 g of the aqueous solution, the mixture was reacted at 160 to 180 ° C. for 10 hours. After the reaction, the reaction product was discharged into a stainless steel pan, cooled, and pulverized to obtain a pale yellow flame retardant powder.
This flame retardant had an epoxy equivalent of 20,000 g / eq, a softening point of 116 ° C., a bromine content of 57%, and an average degree of polymerization of 0.9. This is designated as flame retardant a1.

Synthesis Example 2 (same as above) The amount of TBP used was 240.0 g,
The amount of the 0% aqueous solution was changed to 1.1 g, and a flame retardant powder was obtained in the same manner as in Synthesis Example 1. This flame retardant has an epoxy equivalent of 1580 g / eq, a softening point of 110 ° C., and a bromine content of 5
4.5% and an average degree of polymerization of 0.9. This is designated as flame retardant a2.

Synthesis Example 3 (same as above) The amount of TBA used was 223.2 g, and the amount of sodium hydroxide was 1
A flame retardant powder was obtained in the same manner as in Synthesis Example 1 except that the amount of the 0% aqueous solution was changed to 0.3 g and TBP was not used. This flame retardant has an epoxy equivalent of 820 g / eq and a softening point of 11
The polymer had a bromine content of 6% and an average degree of polymerization of 1.6. This is designated as flame retardant a3.

Synthesis Example 4 (Same as above) The amount of TBA used was 392.0 g, and the amount of sodium hydroxide was 1
A flame retardant powder was obtained in the same manner as in Synthesis Example 1 except that the amount of the 0% aqueous solution was changed to 0.5 g and TBP was not used.
This flame retardant had an epoxy equivalent of 2100 g / eq, a softening point of 160 ° C., a bromine content of 52%, and an average degree of polymerization of 5.8. This is designated as flame retardant a4.

Synthesis Example 5 (same as above) The amount of TBA used was 507.0 g, and the amount of sodium hydroxide was 1
The amount of the 0% aqueous solution was changed to 0.6 g, and the use of TBP was omitted.
A flame retardant powder was obtained in the same manner as in Synthesis Example 1 except that the time was changed.

This flame retardant has an epoxy equivalent of 9000 g /
eq, softening point 207 ° C., bromine content 52%, average degree of polymerization 28. This is designated as flame retardant a5.

Synthesis Example 6 (same as above) A flame retardant powder was obtained in the same manner as in Synthesis Example 1 except that the amount of TBP was changed to 374.0 g, and further that 66.0 g of stearic acid was used.

This flame retardant has a long chain aliphatic carboxylic acid content of 5.0%, an epoxy equivalent of 2500 g / eq, and a softening point of 1
The temperature was 02 ° C., the bromine content was 54%, and the average degree of polymerization was 0.9. This is designated as flame retardant a6.

Examples 1 to 4 (Synthesis of Halogenated Epoxy Resin Containing 5-Membered Carbonate Group) A dioxane solvent, a halogenated epoxy resin obtained in the synthesis example, and a catalyst were used in a stainless steel equipped with a thermometer, a pressure gauge and a stirrer. The flask is put in a flask, the inside is replaced with nitrogen gas, and then heated and dissolved. After the temperature was adjusted to a predetermined value, while continuously introducing carbon dioxide into the reaction solution, the pressure gauge was adjusted to 2.026 × 10 -2.
The reaction is completed under a pressure of MPa to convert the epoxy group into a 5-membered ring carbonate group, and the reaction is completed. After distilling and concentrating a part of the solvent under reduced pressure, the reaction solution is put in a large amount of a mixed solution of water and methanol (50:50 parts) and reprecipitated. The mixture was further pulverized to obtain a halogenated epoxy resin-based flame retardant having a 5-membered ring carbonate group. The reaction results were as shown in Table 1.

[0058]

[Table 1]

Examples 5 to 16 and Comparative Examples 1 to 12 Each component was blended according to the composition shown in Table 2 (part 1) to (part 4), and premixed with a tumbler mixer.
A flame retardant resin composition pelletized by a φ twin screw extruder was obtained. Using the pellets, test pieces were prepared by a 1-oz injection molding machine, and a flammability test, a light resistance test, and a thermal stability test were performed. Each test result is
The results are shown in Tables (1) to (4). In addition, the cylinder set temperature of the extruder and the injection machine at the time of preparing the test piece was HIPS,
ABS polymer, ABS / PC polymer alloy 2
The test was performed at 10 to 230 ° C, and in the case of PBT, a polymer alloy of PBT / PC, and nylon 66, the test was performed at 230 to 250 ° C.

In the table, "HIPS" is a rubber-modified styrene resin "GH-9650" manufactured by Dainippon Ink and Chemicals, Inc.
And “ABS” is ABS resin “J made by Japan Synthetic Rubber Co., Ltd.
"SRABS15", "ABS / PC" is a polymer alloy "JSR Exceloy CB40" made of ABS resin and polycarbonate resin manufactured by Nippon Synthetic Rubber Co., Ltd., and "PBT" is a PBT resin "Barox 310" manufactured by Nippon GE Plastics. “PBT / PC” is a polymer alloy “Xenoy1100” made of PBT resin and polycarbonate resin manufactured by Nippon GE Plastics Co., Ltd., “Nylon 66” is “Zytel 101” manufactured by Dupont, and “Antimony trioxide” is Japan. "PATOX-C" manufactured by Seikosha
And "DBDPE" indicates decabromodiphenyl ether "DE-83R" manufactured by Great Lake Chemical Company.

[0061]

[Table 2]

[0062]

[Table 3]

[0063]

[Table 4]

[0064]

[Table 5]

[0065]

According to the present invention, a flame-retardant thermoplastic resin composition having excellent flame retardancy, light resistance and thermal stability at the time of molding, and an excellent thermoplastic resin are provided. A flame retardant useful for imparting light resistance, flame retardancy, and thermal stability during molding can be provided.

Accordingly, it is possible to produce a molded article having good light resistance and good appearance without burn-in foreign matter by molding, and therefore the composition of the present invention is particularly useful for OA equipment housing materials, automobile interior materials and the like. Useful as a material.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 63:00)

Claims (10)

[Claims] 1. A flame-retardant thermoplastic resin comprising, as essential components, a thermoplastic resin (A) and a halogenated epoxy resin-based flame retardant (B) having a 5-membered carbonate group in a molecule. Composition. 2. A halogenated epoxy resin flame retardant (B)
Has a 5-membered ring carbonate group in the molecule in an average of 1 to 2 mol per 1 mol of the molecule. 3. A halogenated epoxy resin flame retardant (B)
Has a halogenated bisphenol structure represented by the following general formula (1). General formula (1) (Where T1 is And T2 is Embedded image Or X is a halogen atom, i and j are integers of 1-4, k
Is an integer of 1 to 5, n is an integer of 0 to 40 in average degree of polymerization, R
1 represents a hydrogen atom, a methyl group or an ethyl group, and R2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. ) 4. A halogenated epoxy resin flame retardant (B)
The composition according to claim 1, wherein the composition contains 1 to 30% by weight of the composition. 5. The composition according to claim 1, wherein the thermoplastic resin (A) is a styrene-based resin or a polymer alloy containing a styrene-based resin. 6. The composition according to claim 1, wherein the thermoplastic resin (A) is at least one thermoplastic resin selected from a polyester resin, a polyamide resin, and a polycarbonate resin. Stuff. 7. The composition according to claim 1, further comprising a flame retardant auxiliary (D). 8. A flame retardant comprising a halogenated epoxy resin having a 5-membered ring carbonate group in a molecule as an essential component. 9. The flame retardant according to claim 8, wherein the halogenated epoxy resin-based flame retardant has a 5-membered ring carbonate group in the molecule on average of 1 to 2 mol per 1 mol of the molecule. 10. The flame retardant according to claim 8, wherein the halogenated epoxy resin has a halogenated bisphenol structure represented by the following general formula (1). General formula (1) (Where T1 is And T2 is Embedded image Or X is a halogen atom, i and j are integers of 1-4, k
Is an integer of 1 to 5, n is an integer of 0 to 40 in average degree of polymerization, R
1 represents a hydrogen atom, a methyl group or an ethyl group, and R2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. )