JP2002030204A - Flame retardant polyester elastomer resin composition - Google Patents

Abstract

(57) [Problem] To provide a polyester elastomer resin composition having excellent flame retardancy, flexibility, and viscosity stability during melt retention. A polyether having a high melting point crystalline polymer segment (a) mainly composed of a crystalline aromatic polyester unit and a low melting point polymer segment (b) mainly composed of an aliphatic polyether unit as main components. 1 to 50 parts by weight of the phosphorus compound (B), 0.01 to 10 parts by weight of the monocarbodiimide compound (C) and / or the polycarbodiimide compound (D) are added to 100 parts by weight of the ester block copolymer (A). A flame-retardant polyester elastomer resin composition that is blended. Further, if desired, 0.1 to 30 parts by weight of a nitrogen-containing compound (E),
A flame-retardant polyester elastomer resin composition containing 0.01 to 10 parts by weight of a fluororesin (F).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to flame retardancy, flexibility,
The present invention relates to a polyester elastomer resin composition having extremely excellent viscosity stability during melt retention.

[0002]

2. Description of the Related Art Polyester elastomers having a hard segment of a crystalline aromatic polyester unit such as a polybutylene terephthalate unit and a soft segment of an aliphatic polyether unit such as a poly (alkylene oxide) glycol unit are extrudable. Excellent in injection moldability, high mechanical strength, rubber properties such as impact resistance, elastic recovery, flexibility, low and high temperature properties, water resistance, etc. Because
Its applications are expanding to automotive parts, electric / electronic parts, textiles, films, etc.

[0003] In order to improve the flame retardancy of polyester elastomers, many studies have been made on the addition of various flame retardants. Recently, from the viewpoints of safety and environmental considerations, techniques using non-halogen flame retardants have been studied. There are suggestions. For example, JP-A-8-259787 discloses a flame-retardant elastomer composition obtained by blending a phosphorus compound and a nitrogen-containing compound with a thermoplastic polyester elastomer. JP-A-11-48428 discloses a flame-retardant elastomer laminated sheet in which a phosphoric compound such as an ammonium phosphate is added to a polyester block copolymer. JP-A-9-143346 discloses a flame-retardant polyester block copolymer composition obtained by adding ammonium sulfate and a melamine compound to a polyester block copolymer.

However, it has been found that when a phosphorus compound is blended with a polyester elastomer, a problem occurs that the melt viscosity is greatly reduced and the moldability is significantly changed.
At present, the emergence of a polyester elastomer resin composition having good viscosity stability during melt retention, high flame retardancy, and excellent mechanical properties represented by flexibility is expected. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made as a result of studying to solve the problems in the prior art described above.

Accordingly, an object of the present invention is to provide a polyester elastomer resin composition having excellent flame retardancy, flexibility, and viscosity stability during melt retention.

[0007]

In order to achieve the above-mentioned object, a flame-retardant polyester elastomer resin composition of the present invention comprises a high-melting crystalline polymer segment (a) mainly composed of a crystalline aromatic polyester unit. And a low-melting polymer segment (b) mainly composed of an aliphatic polyether unit, and 100 parts by weight of a polyetherester block copolymer (A) having a main component as a main component. 50 parts by weight, and 0.01 to 10 parts by weight of a monocarbodiimide compound (C) and / or a polycarbodiimide compound (D) are blended.

Further, the flame-retardant polyester elastomer resin composition of the present invention comprises a high-melting crystalline polymer segment (a) mainly composed of a crystalline aromatic polyester unit.
And a low-melting polymer segment (b) mainly composed of an aliphatic polyether unit, and 100 parts by weight of a polyetherester block copolymer (A) having a main component as a main component. It is also characterized in that 50 parts by weight, 0.01 to 10 parts by weight of a monocarbodiimide compound (C) and / or polycarbodiimide compound (D) and 0.1 to 30 parts by weight of a nitrogen-containing compound (E) are blended. .

Further, the flame-retardant polyester elastomer resin composition of the present invention comprises a high-melting crystalline polymer segment (a) mainly composed of a crystalline aromatic polyester unit.
And a low-melting polymer segment (b) mainly composed of an aliphatic polyether unit, and 100 parts by weight of a polyetherester block copolymer (A) having a main component as a main component. 50 parts by weight, 0.01 to 10 parts by weight of a monocarbodiimide compound (C) and / or polycarbodiimide compound (D), 0.1 to 30 parts by weight of a nitrogen-containing compound (E), and 0.1 to 30 parts by weight of a fluororesin (F).
It is also characterized by comprising from 0.01 to 10 parts by weight.

In the flame-retardant polyester elastomer resin composition of the present invention, the high-melting crystalline polymer segment (a), which is a component of the polyetherester block copolymer (A), is a polybutylene terephthalate unit. Wherein the low-melting polymer segment (b), which is a component of the polyetherester block copolymer (A), is a poly (tetramethylene oxide) glycol unit and / or an ethylene oxide of poly (propylene oxide) glycol. The polyether ester block copolymer (A) has a copolymerization amount of the low melting point polymer segment (b) of 10 to 80% by weight, and the phosphorus-based compound (B ) Is an organic phosphate and / or an inorganic phosphorus compound, The monocarbodiimide compound (C) is bis (2,6-diisopropylphenyl) carbodiimide; the polycarbodiimide compound (D) is a polymer of triisopropylphenylene-1,3-diisocyanate; The compound (E) is a triazine-based compound, the fluorine-based resin (F) is a polytetrafluoroethylene-based polymer, and is used for coating an electric wire or an optical fiber. Yes, when these conditions are applied, it is possible to expect to obtain a better effect.

In particular, a feature of the present invention is to provide a novel flame-retardant polyester elastomer resin composition,
Furthermore, to suppress a large decrease in melt viscosity that occurs when a phosphorus compound is blended with the polyester elastomer,
The point is that a specific carbodiimide compound has been found to work extremely effectively. It is surprising that such effects are unexpected from the conventional knowledge.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The high-melting crystalline polymer segment (a) of the polyetherester block copolymer (A) used in the present invention is formed from an aromatic dicarboxylic acid or an ester-forming derivative thereof and an aliphatic diol. It contains at least 70 mol% of a unit composed of a crystalline aromatic polyester, and is preferably a polybutylene terephthalate unit derived from terephthalic acid and / or dimethyl terephthalate and 1,4-butanediol,
In addition, terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-
Dicarboxylic acid, diphenyl-4,4′-dicarboxylic acid,
A dicarboxylic acid component such as diphenoxyethanedicarboxylic acid, 5-sulfoisophthalic acid, or an ester-forming derivative thereof, and a diol having a molecular weight of 300 or less, for example, 1,4-butanediol, ethylene glycol, trimethylene glycol, pentamethylene glycol Aliphatic diols such as hexamethylene glycol, neopentyl glycol and decamethylene glycol; alicyclic diols such as 1,4-cyclohexanedimethanol and tricyclodecanedimethylol; xylylene glycol; bis (p-hydroxy) diphenyl; Bis (p-hydroxyphenyl) propane, 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane, bis [4- (2
-Hydroxy) phenyl] sulfone, 1,1-bis [4
-(2-hydroxyethoxy) phenyl] cyclohexane, 4,4'-dihydroxy-p-terphenyl,
It may be a polyester unit derived from an aromatic diol such as 4′-dihydroxy-p-quarterphenyl, or a copolymerized polyester unit obtained by using two or more of these dicarboxylic acid components and diol components. It is also possible to copolymerize a trifunctional or higher polyfunctional carboxylic acid component, a polyfunctional oxyacid component, a polyfunctional hydroxy component and the like in a range of 5 mol% or less.

The low melting point polymer segment (b) of the polyester block copolymer (A) used in the present invention contains at least 70 mol% of a unit mainly composed of an aliphatic polyether. Specific examples of the aliphatic polyether include poly (ethylene oxide) glycol,
Poly (propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, copolymer of ethylene oxide and propylene oxide, ethylene oxide addition polymer of poly (propylene oxide) glycol, copolymer of ethylene oxide and tetrahydrofuran Coalescence and the like.
Among these aliphatic polyethers, it is preferable to use poly (tetramethylene oxide) glycol and an ethylene oxide adduct of poly (propylene oxide) glycol because the resulting polyester block copolymer has excellent elastic properties. Further, the number average molecular weight of these low melting point polymer segments is preferably about 300 to 6000 in a copolymerized state.

The copolymerization amount of the low-melting polymer segment (b) in the polyetherester block copolymer (A) used in the present invention is preferably 10 to 80% by weight,
More preferably, the content is 15 to 75% by weight.

The polyetherester block copolymer (A) used in the present invention can be produced by a known method. For example, a method of subjecting a lower alcohol diester of a dicarboxylic acid, an excessive amount of a low-molecular-weight glycol, and a low-melting polymer segment component to a transesterification reaction in the presence of a catalyst, and polycondensing the obtained reaction product, A method of subjecting an amount of glycol and a low-melting polymer segment component to an esterification reaction in the presence of a catalyst to polycondensate the resulting reaction product. Any method may be used, such as a method in which the compound is added and randomized by a transesterification reaction.

Specific examples of the phosphorus compound (B), which is one of the components used in the present invention, include trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, octyl diphenyl phosphate, and triclet phosphate. Zyl phosphate, cresyl diphenyl phosphate, triphenyl phosphate, trixylenyl phosphate, diethyl N, N-bis (2-hydroxyethyl) aminomethylphosphonate, bis (1,3-phenylenediphenyl) phosphate, resorcinol-bis- (di- 2,6-dimethylphenyl phosphate), hydroquinone-bis- (di-2,6-dimethylphenyl phosphate), 4,4'-biphenylene-bis- (di-2,6-dimethylphenyl) Phenyl phosphate), organic phosphates such as resorcinol-bis- (di-4-methylphenyl phosphate), hydroquinone-bis- (di-4-methylphenyl phosphate), resorcinol-bis- (dimethylphenyl phosphate) and / or Inorganic phosphorus compounds such as ammonium polyphosphate and melamine phosphate are exemplified. Among these, triphenyl phosphate, resorcinol-bis- (di-
Use of 2,6-dimethylphenyl phosphate), hydroquinone-bis- (di-2,6-dimethylphenyl phosphate) and ammonium polyphosphate is preferred. Ammonium polyphosphate whose surface is coated can also be used. The compounding amount of the phosphorus compound (B) is determined based on the polyetherester block copolymer (A) 10
1 to 50 parts by weight, preferably 3 to 45 parts by weight with respect to 0 parts by weight.
Parts by weight, more preferably 5 to 40 parts by weight.

Specific examples of the monocarbodiimide compound (C) which is one of the components used in the present invention include dimethylcarbodiimide, diisopropylcarbodiimide, dioctylcarbodiimide, t-butylisopropylcarbodiimide, dodecylisopropylcarbodiimide, dicyclohexylcarbodiimide, diphenylcarbodiimide. , Di-o-tolylcarbodiimide, bis (2,6-
Examples thereof include (diethylphenyl) carbodiimide, bis (2,6-diisopropylphenyl) carbodiimide, di-β-naphthylcarbodiimide, benzylisopropylcarbodiimide, and phenyl-o-tolylcarbodiimide. Among these, the use of bis (2,6-diisopropylphenyl) carbodiimide is particularly preferred.

The polycarbodiimide compound (D), one of the components used in the present invention, has at least 2
A compound having two carbodiimide groups, usually a compound derived from an isocyanate compound. Specific examples thereof include aromatic diisocyanates such as phenylene diisocyanate, toluene diisocyanate, methylene bisphenyl diisocyanate, xylene diisocyanate, triisopropylphenylene-1,3-diisocyanate, and tetramethylxylylene diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate. And carbodiimide compounds derived from aliphatic diisocyanates. Also,
A urea-modified polycarbodiimide obtained by reacting an aliphatic diisocyanate with a primary or secondary organic aliphatic amine to introduce a urea bond into the aliphatic diisocyanate and then carbodiimidating the urea-modified polycarbodiimide is also included. Among these, use of a polymer of triisopropylphenylene-1,3-diisocyanate is particularly preferable. The compounding amount of the monocarbodiimide compound (C) and / or the polycarbodiimide compound (D) is 0.01 to 10 parts by weight, preferably 0.03 to 10 parts by weight, based on 100 parts by weight of the polyetherester block copolymer (A). 7 parts by weight, more preferably 0.05 to 5 parts by weight.

When the flame-retardant polyester elastomer resin composition of the present invention contains a nitrogen-containing compound (E), the flame retardancy, mechanical properties and moldability are further improved in a well-balanced manner. Specific examples of the nitrogen-containing compound (E) which is one of the components used in the present invention include melamine, cyanuric acid,
Melamine cyanurate, melamine phosphate, benzoguanamine, acetoguanamine and the like can be mentioned. Of these, melamine cyanurate is particularly preferred. The compounding amount of the nitrogen-containing compound (E) is 0.1 to 3 with respect to 100 parts by weight of the polyetherester block copolymer (A).
0 parts by weight, preferably 0.3 to 25 parts by weight, more preferably 0.5 to 20 parts by weight.

Further, when the flame-retardant polyester elastomer resin composition of the present invention contains a fluorine-based resin (F), dripping during combustion is suppressed, which is effective for improving flame retardancy. Specific examples of the fluororesin (F) which is one of the components used in the present invention include polytetrafluoroethylene, (tetrafluoroethylene / perfluoroalkylvinyl ether) copolymer, and (tetrafluoroethylene / ethylene) copolymer. Tetrafluoroethylene-based polymers such as a polymer and a (tetrafluoroethylene / hexafluoropropylene) copolymer are exemplified. Among these, use of polytetrafluoroethylene is particularly preferred. The amount of the fluorine-based resin (F) to be added is 0.1 to 100 parts by weight of the polyetherester block copolymer (A).
The amount is from 0.01 to 10 parts by weight, preferably from 0.05 to 7 parts by weight, more preferably from 0.1 to 5 parts by weight.

In addition to the additives (B) to (F), various additives can be added to the flame-retardant polyester elastomer resin composition of the present invention as long as the object of the present invention is not impaired. For example, molding auxiliaries such as known nucleating agents and lubricants, various antioxidants and heat-resistant agents, UV absorbers and hindered amine-based light stabilizers, hydrolysis resistance improvers,
A coloring agent such as a pigment or a dye, an antistatic agent, a conductive agent, a reinforcing agent, a filler, a plasticizer, a release agent, a silane coupling agent and the like can be optionally contained.

The method for producing the flame-retardant polyester elastomer resin composition of the present invention is not particularly limited. For example, a raw material obtained by mixing a predetermined phosphorus compound and a carbodiimide compound with a polyetherester block copolymer is used. Alternatively, a raw material obtained by mixing a predetermined phosphorus compound and a carbodiimide compound and, if necessary, a nitrogen-containing compound or a fluorine-based resin in the polyetherester block copolymer, is supplied to a screw-type extruder and melt-kneaded.
To a screw-type extruder, first supply and melt the polyetherester block copolymer, and then supply and knead the phosphorus compound and other additives from another supply port, first to the screw-type extruder, Polyetherester block copolymer, supply and melt carbodiimide compound,
Further, a method in which a phosphorus-based compound or other additives are supplied from another supply port and kneaded, and the like can be appropriately adopted. It is also possible to adopt a method in which the vent port of the screw type extruder is connected to a vacuum pump or the like to forcibly discharge volatile components and the like in the extruder.

The flame-retardant polyester elastomer resin composition of the present invention thus obtained is not only excellent in flame retardancy and flexibility, but also has good viscosity stability, especially during melt retention. Also excellent in extrusion moldability and injection moldability. For this reason, automotive parts, electrical and electronic parts, textiles,
It is extremely useful in fields such as films and sheets. Further, since it is flexible and can be colored freely, it is also useful for covering electric wires or covering optical fibers.

[0025]

EXAMPLES The structure and effect of the present invention will be further described below with reference to examples. All percentages and parts in the examples are on a weight basis unless otherwise specified. The physical properties shown in Reference Examples were measured as follows. [Relative viscosity] 0.5 using o-chlorophenol as a solvent
% Polymer solution was measured at 25 ° C. [Melting Point] Differential Scanning Calorimeter (Du Pont DSC-
910) was measured at the top of the melting peak when heated at a rate of 10 ° C./min in a nitrogen gas atmosphere. [Melt viscosity (MFR value) and retention stability] ASTM
According to D-1238, temperature 240 ° C, load 2160g
Was measured. [Hardness (Shore D scale)] Measured according to JIS K-7215. [Flame Retardancy] Flame retardancy of a test piece for flame retardancy evaluation obtained by injection molding was evaluated in accordance with the evaluation criteria defined in UL94. [Tensile modulus] Measured according to JIS K-7113. [Reference Example] [Production of polyester block copolymer (A-1)] 322 parts of terephthalic acid, 280 parts of 1,4-butanediol and 80 parts of poly (tetramethylene oxide) glycol having a number average molecular weight of about 1000 were added to titanium. 0.15 part of tetrabutoxide was charged into a reaction vessel equipped with a helical ribbon type stirring blade, and heated at 190 to 225 ° C for 3 hours to carry out an esterification reaction while distilling reaction water out of the system.
To the reaction mixture was added 0.75 part of "Irganox" 1010 (a hindered phenol-based antioxidant manufactured by Ciba Geigy), and the temperature was raised to 245 ° C. Then, the pressure in the system was raised to 27 Pa over 50 minutes. The pressure was reduced, and polymerization was carried out under the conditions for 2 hours and 45 minutes. The obtained polymer was discharged into water in the form of a strand, and cut into pellets. [Production of polyetherester block copolymer (A-2)] 297 parts of dimethyl terephthalate, 243 parts of 1,4-butanediol and 300 of poly (tetramethylene oxide) glycol (number average molecular weight: about 1400) 300 Was charged into a reaction vessel equipped with a helical ribbon type stirring blade together with 0.15 part of titanium tetrabutoxide, and heated at 210 ° C. for 2 hours to obtain 95% of the theoretical methanol amount of methanol.
Was distilled out of the system. After adding 0.75 parts of “Irganox” 1010 to the reaction mixture, the temperature was raised to 245 ° C., and then the pressure in the system was reduced to 27 Pa over 50 minutes, and polymerization was carried out under these conditions for 2 hours and 20 minutes. I let you. The obtained polymer was discharged into water in the form of a strand, and cut into pellets. [Production of polyetherester block copolymer (A-3)] 189 parts of dimethyl terephthalate, 160 parts of 1,4-butanediol, and poly (propylene oxide) glycol whose end was capped with ethylene oxide (number Average molecular weight: about 2200, EO content: 26.8%) 29
7 parts together with 0.15 part of titanium tetrabutoxide and 3 parts of trimellitic anhydride were placed in a reaction vessel equipped with a helical ribbon-type stirring blade, and heated at 210 ° C. for 2 hours and 30 minutes to obtain a theoretical amount of methanol. 95% of methanol was distilled out of the system. Add "Irganox" 1010 to the reaction mixture.
After adding 0.75 parts, the temperature was raised to 245 ° C., and the pressure in the system was reduced to 27 Pa over 50 minutes, and polymerization was carried out under the conditions for 1 hour and 50 minutes. The obtained polymer was discharged into water in the form of a strand, and cut into pellets.

The polymers A-1 and A thus obtained
Table 1 shows the composition and physical properties of A-2 and A-3.

[0027]

[Table 1] [Examples 1 to 7] The polyetherester block copolymers (A-1), (A-2), and (A-
In 3), a phosphorus compound, a carbodiimide compound, a nitrogen-containing compound, and a fluorine resin were dry-blended at a mixing ratio shown in Table 2, and the mixture was heated at 240 ° C. using a twin-screw extruder having a 45 mmφ screw. After melt-kneading, the mixture was pelletized. The pellets were dried at 80 ° C. for 5 hours, and injection molded at a molding temperature of 240 ° C. and a mold temperature of 60 ° C.

Using the pellets and injection molded pieces thus obtained, flame retardancy, viscosity stability during melt retention and other physical properties were measured. Table 3 shows the results.

[0029]

[Table 2]

[0030]

[Table 3] [Comparative Examples 1 to 4] The raw materials of the resin composition were dry-blended at the respective mixing ratios shown in Table 2, and pelletized as in Examples 1 to 5. From these pellets, Examples 1 to 5
A test piece was prepared by injection molding in the same manner as described above.
The results are shown in Table 3.

As is evident from the results in Table 3, the flame-retardant polyester elastomer resin composition of the present invention in which a phosphorus compound and a carbodiimide compound are blended with a polyetherester block copolymer has a high flame retardancy, flexibility, Excellent viscosity stability during melt retention. Further, the flame-retardant polyester elastomer resin composition of the present invention in which the polyetherester block copolymer is blended with a phosphorus compound and a carbodiimide compound, and further containing a nitrogen-containing compound and a fluorine-based resin, has a better property balance. . On the other hand, the resin composition of the comparative example is more flame-retardant than the resin composition of the present invention,
Poor flexibility and viscosity stability during melting.

[0032]

As described above, the flame-retardant polyester elastomer resin composition of the present invention comprises a polyetherester block copolymer containing a phosphorus compound and a carbodiimide compound, or a polyetherester block. By blending a phosphorus compound, a carbodiimide compound, a nitrogen-containing compound, and a fluorine resin with the copolymer, excellent flame retardancy, flexibility, and viscosity stability during melt retention are exhibited.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01B 3/42 H01B 3/42 EG 7/295 (C08L 67/00 // (C08L 67/00 79: 00 79:00 27:12) 27:12) H01B 7/34 B (72) Inventor: Yasushi Kubo 19804, Kita-ku, Hoshiboshizaki-cho, Minato-ku, Nagoya-shi, Aichi Reference) 4J002 BD123 BD153 CF101 CM052 DH057 ER006 EU188 EW047 5G305 AA02 AA14 AB17 AB19 AB25 AB36 BA13 CA11 CA13 CA38 CA47 CA52 CB15 CB23 DA21 5G315 CA03 CB02 CB06 CC08 CD03 CD08

Claims (12)

[Claims] 1. A polymer comprising, as main components, a high-melting crystalline polymer segment (a) mainly composed of a crystalline aromatic polyester unit and a low-melting polymer segment (b) mainly composed of an aliphatic polyether unit. 1 to 50 parts by weight of phosphorus compound (B), 0.01 to 10 parts by weight of monocarbodiimide compound (C) and / or polycarbodiimide compound (D) based on 100 parts by weight of ether ester block copolymer (A). And a flame-retardant polyester elastomer resin composition. 2. A polymer comprising, as main components, a high-melting crystalline polymer segment (a) mainly composed of crystalline aromatic polyester units and a low-melting polymer segment (b) mainly composed of aliphatic polyether units. 1 to 50 parts by weight of phosphorus compound (B), 0.01 to 10 parts by weight of monocarbodiimide compound (C) and / or polycarbodiimide compound (D) based on 100 parts by weight of ether ester block copolymer (A). , Nitrogen-containing compound (E)
A flame-retardant polyester elastomer resin composition containing 0.1 to 30 parts by weight. 3. A polymer comprising, as main components, a high-melting crystalline polymer segment (a) mainly composed of crystalline aromatic polyester units and a low-melting polymer segment (b) mainly composed of aliphatic polyether units. 1 to 50 parts by weight of phosphorus compound (B), 0.01 to 10 parts by weight of monocarbodiimide compound (C) and / or polycarbodiimide compound (D) based on 100 parts by weight of ether ester block copolymer (A). , Nitrogen-containing compound (E)
0.1 to 30 parts by weight, fluororesin (F) 0.01 to 1
A flame-retardant polyester elastomer resin composition containing 0 parts by weight. 4. The high-melting crystalline polymer segment (a) which is a component of the polyetherester block copolymer (A) is composed of polybutylene terephthalate units. 3. The flame-retardant polyester elastomer resin composition according to item 1. 5. The low-melting polymer segment (b), which is a component of the polyetherester block copolymer (A), comprises a poly (tetramethylene oxide) glycol unit and / or poly (propylene oxide) glycol having ethylene oxide. The flame-retardant polyester elastomer resin composition according to any one of claims 1 to 4, which is composed of a polymer unit. 6. The polyetherester block copolymer (A) according to claim 1, wherein the copolymerization amount of the low melting point polymer segment (b) is 10 to 80% by weight. Flame retardant polyester elastomer resin composition. 7. The method according to claim 1, wherein said phosphorus compound (B) is an organic phosphate and / or an inorganic phosphorus compound.
7. The flame-retardant polyester elastomer resin composition according to any one of 6. 8. The monocarbodiimide compound (C),
The flame-retardant polyester elastomer resin composition according to claim 1, which is bis (2,6-diisopropylphenyl) carbodiimide. 9. The polycarbodiimide compound (D) comprises:
The flame-retardant polyester elastomer resin composition according to any one of claims 1 to 7, which is a polymer of triisopropylphenylene-1,3-diisocyanate. 10. The flame-retardant polyester elastomer resin composition according to claim 2, wherein the nitrogen-containing compound (E) is a triazine-based compound. 11. The flame-retardant polyester elastomer resin composition according to claim 3, wherein the fluorine-based resin (F) is a polytetrafluoroethylene-based polymer. 12. The flame-retardant polyester elastomer resin composition according to claim 1, which is used for coating an electric wire or an optical fiber.