KR20190121003A - Eco-friendly thermoplastic polyether ester elastomer comprising anhydrosugar alcohol derivative and method for preparing the same - Google Patents

Abstract

The present invention relates to a thermoplastic polyether ester elastomer (TPEE) having a hard segment and a soft segment, and a manufacturing method thereof. To be more specifically, the TPEE includes a derived unit from a furan-family dicarboxyl compound or a combination between the furan-family dicarboxyl compound and an aromatic dicarboxyl compound inside the hard segment and the soft segment, and includes an anhydrosugar alcohol derivative-derived unit with improved biomass-derived reactivity inside the soft segment. Therefore, the TPEE can excellently maintain an elastic feature and a physical feature (e.g. hardness and pyrolysis temperature), which is important features of an elastomer, can easily regulate the melting point variously required in a molding process of a finished product, can solve a depleted oil resource, a limited resource, and can further improve environment friendly properties.

Description

Eco-friendly thermoplastic polyether ester elastomer comprising anhydrosugar alcohol derivative and method for preparing the same}

The present invention relates to a thermoplastic polyether ester elastomer (TPEE) having a hard segment and a soft segment and a method for preparing the same, more particularly, to a furan dicarboxylic compound in the hard segment and the soft segment, or It contains elastic units which are derived from a combination of a furan group dicarboxylic compound and an aromatic dicarboxyl compound, and includes an anhydrosugar alcohol derivative derived unit having improved reactivity derived from biomass in the soft segment, and is an important characteristic of the elastomer. And while maintaining excellent physical properties (eg hardness, pyrolysis temperature, etc.), it is possible to more easily control the melting point required in the molding process of the final product, and solve the problem of exhaustion of finite resources , To further improve the eco-friendliness Thermoplastic polyether ester elastomer with and to a production method thereof.

Elastomers are used in many applications such as packaging containers, automotive interior materials, elastic fibers, etc. due to their unique elastic properties, and especially in the case of thermoplastic polyether ester copolymers, their usage is increasing due to a wide range of elastic properties. Also, since elastomers are easy to recycle, unlike rubber materials that cannot be recycled, the demand for elastomers is greatly increased.

Thermoplastic elastomers are polymers that have both two different properties: the elastic properties of elastomers, which are thermoplastic and rubbery polymers that can be reformed upon heating. The type of thermoplastic elastomer is a block copolymer, which is generally composed of a hard segment block that can exhibit the characteristics of thermoplastic and a soft segment block that can exhibit the elastic properties of the elastomer, simultaneously exhibiting two different properties.

In general, it is known that polyether ester copolymers having a polybutylene terephthalate-based polyester as a hard segment and a polybutylene ether ester as a soft segment exhibit excellent elastic properties. Is also used as a soft segment.

US 3,023,192 discloses hard segment / soft segment copolyesters and elastomers prepared therefrom. Hard segment / soft segment copolyesters are prepared from dihydroxy compounds selected from (1) dicarboxylic acid or ester forming derivatives, (2) polyethylene glycol ethers, and (3) bisphenols and lower aliphatic glycols. Polyethers used as soft segments with polyethylene glycol include polypropylene glycol, polytetramethylene glycol, polyhexamethylene glycol, and the like, and polyethers having a molecular weight of about 350 to 6,000 are used.

U.S. Patent No. 4,937,314 discloses thermoplastic polyether ester elastomers comprising at least 70 parts by weight of soft segments derived from poly (alkylene oxide) glycol and terephthalic acid. The hard segment comprises 10 to 30 parts by weight of the elastomer, of which the poly (1,3-propylene terephthalate) is 95 to 100 parts by weight. The molecular weight of the poly (alkylene oxide) glycols is from about 1,500 to about 5,000, and the carbon to oxygen ratio is shown to be 2 to 4.3.

Thermoplastic elastomers based on those exemplified in the prior art are soft segments which are mainly polytetramethylene glycol ethers, copolymers of tetrahydrofuran and 3-alkyltetrahydrofuran, polyethylene glycol ethers, polytrimethylene glycol ethers and copolymers thereof Use The melting point and physical properties of these copolymers are determined by the molecular weight and composition ratio of the polyalkylene glycol ethers used as soft segments. When a high molecular weight polyalkylene glycol ether is used to express tough physical and elastic properties, it cannot be applied to a process requiring a low melting point manufacturing process because of its high melting point. In addition, in the case of forming the polyethylene glycol ether into the soft segment, the thermal stability is drastically deteriorated when the content of the soft segment is added 20% by weight or more.

In recent years, active research on eco-friendly biomass has been attracting attention as part of efforts to reduce carbon dioxide emission, which is a major cause of global warming, and to replace limited expensive oil resources. There is a strong demand for conversion from conventional petroleum-derived plastics to plastics derived from plant raw materials with less environmental load.

In order to solve the above problems, the present invention further improves the environmental friendliness, while maintaining excellent elastic and physical properties of the thermoplastic elastomer, it is possible to more easily control the melting point required in the molding process of the final product An object of the present invention is to provide a thermoplastic polyether ester elastomer and a method for producing the same.

In order to solve the above technical problem, the present invention provides a thermoplastic polyether ester elastomer comprising a hard segment and a soft segment, wherein the hard segment includes a dicarboxylic compound and an aliphatic diol component as a polymer unit, and the soft segment is a polymer unit. And a dicarboxylic compound and a glycol component, wherein the glycol component comprises anhydrosugar alcohol-alkylene glycol, and the dicarboxyl compound is a furan dicarboxylic compound or a furan dicarboxylic compound and an aromatic dica Provided are thermoplastic polyether ester elastomers, which are combinations of carboxyl compounds.

According to another aspect of the present invention, it comprises a polycondensation reaction of a dicarboxylic compound and a polyol, wherein the polyol comprises an aliphatic diol component and a glycol component, the glycol component is an anhydrosugar alcohol-alkylene glycol A method for producing a thermoplastic polyether ester elastomer is provided, wherein the dicarboxylic compound is a furan dicarboxyl compound, or a combination of a furan dicarboxyl compound and an aromatic dicarboxyl compound.

According to another aspect of the present invention, there is provided a molded article comprising the thermoplastic polyether ester elastomer of the present invention.

The thermoplastic polyether ester elastomer (TPEE) according to the present invention consists of a hard segment and a soft segment, and a furan dicarboxylic compound or a combination of a furan dicarboxylic compound and an aromatic dicarboxylic compound in the hard segment and the soft segment. And a unit derived from anhydrosugar alcohol derivative having improved reactivity derived from biomass in the soft segment, and the elastic and physical properties (e.g., hardness, pyrolysis temperature, etc.), which are important properties of the elastomer, are included in the soft segment. While maintaining excellent, it is possible to more easily control the melting point required in the molding process of the final product, to solve the problem of exhaustion of petroleum resources, which is a finite resource, and to further improve the environmental friendliness.

Hereinafter, the present invention will be described in detail.

The hard segment constituting the thermoplastic polyether ester elastomer of the present invention includes a dicarboxylic compound and an aliphatic diol component as polymerized units.

The dicarboxylic compound may be a furan group dicarboxyl compound, or a combination of a furan group dicarboxyl compound and an aromatic dicarboxyl compound.

The furan dicarboxylic compound is, for example, dimethyl-2,3-furan dicarboxylate, dimethyl-2,4-furan dicarboxylate, dimethyl-3,4-furan dicarboxylate, dimethyl- 2,5-furan dicarboxylate, 2,3-furan dicarboxylic acid, 2,4-furan dicarboxylic acid, 3,4-furan dicarboxylic acid, 2,5-furan dicarboxylic acid, Diethyl-2,3-furan dicarboxylate, diethyl-2,4-furan dicarboxylate, diethyl-3,4-furan dicarboxylate, diethyl-2,5-furan dicarboxylate Late, dipropyl-2,3-furan dicarboxylate, dipropyl-2,4-furan dicarboxylate, dipropyl-3,4-furan dicarboxylate, dipropyl-2,5-furan dica Carboxylate or a mixture of two or more thereof, preferably dimethyl-2,5-furan dicarboxylate, diethyl-2,5-furan dicarboxylate, dipropyl-2,5-furan dica Reboxylate, 2,5-furan Dicar Acids, or may be a mixture of two or more of them, and the like.

In one embodiment, in order to improve environmental friendliness, the furan group dicarboxylic compound may be a furan group dicarboxylic compound derived from biomass.

The aromatic dicarboxylic compound may be an aromatic dicarboxylic acid or an aromatic dicarboxylate compound, and more specifically, terephthalic acid, isophthalic acid, 1,5-dinaphthalene dicarboxylic acid, 2,6-dinaphthalene It may be selected from the group consisting of dicarboxylic acid, dimethyl terephthalate, dimethyl isophthalate or a combination thereof.

The aliphatic diol component included as a polymer unit in the hard segment may be a linear or cyclic aliphatic diol, specifically a linear aliphatic diol having 2 to 8 carbon atoms or a cyclic aliphatic diol having 3 to 8 carbon atoms, and more specifically , Ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol or combinations thereof.

The soft segment constituting the thermoplastic polyether ester elastomer of the present invention comprises a dicarboxylic compound and a glycol component as polymerized units, wherein the glycol component comprises anhydrosugar alcohol-alkylene glycol.

As said dicarboxyl compound contained in a soft segment as a polymerization unit, the thing similar to what was demonstrated previously in the hard segment can be used.

The anhydrosugar alcohol-alkylene glycol is an adduct obtained by reacting an alkylene oxide with a hydroxyl group at both ends or at one end (preferably both ends) of the anhydrosugar alcohol.

In one embodiment, the anhydrosugar alcohol may be selected from the group consisting of isosorbide, isomannide, isoidide, or a combination thereof, preferably isosorbide.

In one embodiment, the alkylene oxide may be linear or branched alkylene oxide of 2 to 8 carbon atoms, more specifically ethylene oxide, propylene oxide or a combination thereof.

In one embodiment, the anhydrosugar alcohol-alkylene glycol may be a compound represented by the following formula (1).

[Formula 1]

In Chemical Formula 1,

R ¹ and R ² each independently represent a linear or branched alkylene group having 2 to 8 carbon atoms or 3 to 8 carbon atoms,

m and n each independently represent an integer of 0 to 15,

m + n represents the integer of 1-30.

More preferably, in Chemical Formula 1,

R ¹ and R ² each independently represent an ethylene group, a propylene group or an isopropylene group, preferably R ¹ and R ² are the same as each other,

m and n each independently represent an integer of 1 to 14,

m + n represents the integer of 2-15.

In one embodiment, the following isosorbide-propylene glycol, isosorbide-ethylene glycol or a mixture thereof may be used as the anhydrosugar alcohol-alkylene glycol.

[Isosorbide-propylene glycol]

In the above formula, a and b each independently represent an integer of 0 to 15, a + b may be an integer of 1 to 30, more preferably a and b each independently represent an integer of 1 to 14, a + b may be an integer from 2 to 15.

[Isosorbide-ethylene glycol]

In the above formula, c and d each independently represent an integer of 0 to 15, c + d may be an integer of 1 to 30, more preferably c and d each independently represent an integer of 1 to 14, c + d may be an integer from 2 to 15.

In 100% by weight of the thermoplastic polyether ester elastomer (TPEE) of the present invention, the isosorbide-alkylene glycol is 1% by weight, 2% by weight, 3% by weight, 5% by weight, 8% by weight. Or more, 10 wt% or more or 15 wt% or more, and 40 wt% or less, 39 wt% or less, 35 wt% or less, 33 wt% or less, 31 wt% or less, 28 wt% or less, or 25 wt% or less. It may be included as. For example, it may be included in an amount of 1 to 40% by weight, such as 3 to 40% by weight, such as 3 to 39% by weight, such as 3 to 35% by weight, such as 3 to 31% by weight. If the isosorbide-alkylene glycol content in the TPEE is lower than the above range, the eco-friendliness of the elastomer is poor, on the contrary, if the content is too high, the crystalline portion of the elastomer disappears and the melting point is lost.

The glycol component included as polymerized units in the soft segment may further comprise polyalkylene ether glycol.

The polyalkylene ether glycol may be poly (C ₂ -C ₈ ) alkylene ether glycol, preferably selected from the group consisting of polyethylene ether glycol, polypropylene ether glycol, polytetramethylene ether glycol or combinations thereof. More preferably polytetramethylene ether glycol.

Within 100% by weight of the thermoplastic polyether ester elastomer (TPEE) of the present invention, the soft segment may be included, for example, from 5% by weight to 75% by weight, more preferably from 30% by weight to 70% by weight. have. It is preferable that the soft segment content in the TPEE be within the above range in view of blow molding processability, mechanical strength and flexibility. If the content of the soft segment in the TPEE is too small than the above-mentioned level, the hardness becomes high, so that it is difficult to expect flexibility, and on the contrary, too much, it is difficult to expect high heat resistance.

According to another aspect of the present invention, it comprises a polycondensation reaction of a dicarboxylic compound and a polyol, wherein the polyol comprises an aliphatic diol component and a glycol component, the glycol component is an anhydrosugar alcohol-alkylene glycol A method for producing a thermoplastic polyether ester elastomer is provided, wherein the dicarboxylic compound is a furan dicarboxyl compound, or a combination of a furan dicarboxyl compound and an aromatic dicarboxyl compound.

As the dicarboxylic compound, those as described above in the hard segment may be used.

The polycondensation reaction can be carried out under reduced pressure, optionally in the presence of a catalyst, for example under temperature conditions of 210 to 250 ° C.

The thermoplastic polyether ester elastomer of the present invention is suitable for molding processing such as blow, extrusion, injection, and the like, while maintaining excellent elastic properties and physical properties (for example, hardness and pyrolysis temperature, etc.), which are important properties of the elastomer, and the final product. Melting point required in the molding process of the various can be easily adjusted.

Thus, according to another aspect of the present invention, there is provided a molded article comprising the thermoplastic polyether ester elastomer of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the scope of the present invention is not limited to these.

[ Example ]

< Anhydrosugar  Preparation of Alcohol-Alkylene Glycol>

Production Example  A1 : Isosorbide Ethylene glycol (Ethylene of isosorbide Oxide  5 mole adduct)

73.1 g (0.5 mol) of isosorbide, 110 g (2.5 mol) of ethylene oxide and 0.2 g of sodium hydroxide as catalyst were placed in a pressurized reactor equipped with a nitrogen gas pipe and a column equipped with a chiller, a stirrer, a thermometer and a heater. The temperature was raised slowly. Isosorbide-ethylene glycol (ethylene oxide 5 of isosorbide) in the form where hydrogen of the hydroxyl group at both ends of the isosorbide is substituted with a hydroxyethyl group by reacting while maintaining for 2 to 4 hours at a temperature of 120 ° C to 160 ° C. Mole adduct).

Production Example  A2 : Isosorbide Ethylene glycol (Ethylene of isosorbide Oxide  10 mole adduct)

73.1 g (0.5 mol) of isosorbide, 220 g (5 mol) of ethylene oxide and 0.2 g of sodium hydroxide as a catalyst were placed in a pressurized reactor equipped with a nitrogen gas pipe and a column equipped with a chiller, a stirrer, a thermometer and a heater. The temperature was raised slowly. Isosorbide-ethylene glycol (ethylene oxide 10 of isosorbide) in a form in which hydrogen of the hydroxy group at both ends of the isosorbide is substituted with a hydroxyethyl group by reacting at a temperature of 120 ° C. to 160 ° C. for 2 to 4 hours. Mole adduct).

Production Example  B1 : Isosorbide propylene glycol (propylene of isosorbide Oxide  5 mole adduct)

73.1 g of isosorbide (0.5 mol), 145 g (2.5 mol) of propylene oxide and 0.2 g of sodium hydroxide as a catalyst were placed in a pressurized reactor equipped with a nitrogen gas pipe and a column, agitator, thermometer and heater equipped with a cooling system. The mixture was gradually heated up. Isosorbide-propylene glycol (propylene oxide 5 of isosorbide) in a form where hydrogen of the hydroxyl group at both ends of the isosorbide is substituted with a hydroxypropyl group by reacting for 2 to 4 hours at a temperature of 120 ° C to 160 ° C. Mole adduct).

Production Example  B2 : Isosorbide propylene glycol (propylene of isosorbide Oxide  8 mole adduct)

73.1 g (0.5 mol) of isosorbide, 232 g (4 mol) of propylene oxide, and 0.2 g of sodium hydroxide as a catalyst were placed in a pressurized reactor equipped with a nitrogen gas pipe and a column equipped with a chiller, a stirrer, a thermometer and a heater. The mixture was gradually heated up. Isosorbide-propylene glycol (propylene oxide 8 of isosorbide) in the form where hydrogen of the hydroxyl group at both ends of the isosorbide is substituted with a hydroxypropyl group by reacting for 2 to 4 hours at a temperature of 120 ° C to 160 ° C. Mole adduct).

Preparation of Thermoplastic Polyether Ester Elastomers

Example  1 to 9

Into a 15 L melt condensation reactor, the reactants of the composition shown in Table 1 were added, and based on the acid component (FDME; or a combination of FDME and DMT), 700 ppm of titanium-based catalyst was added thereto, and the by-products were raised to 210 ° C. The resulting alcohol was removed, and a 300 ppm titanium catalyst was added to increase the temperature to 245 ° C. while gradually reducing the pressure of the reaction system to 1 mmHg, thereby preparing thermoplastic polyether ester elastomers according to Examples 1 to 9.

Comparative example  1 to 3

The reactant of the composition shown in Table 2 was added to a 15 L melt condensation reactor, and 700 ppm titanium-based catalyst was added based on the acid component (FDME; or a combination of FDME and DMT), and then the temperature was increased to 210 ° C by-product. The resulting alcohol was removed, and a 300 ppm titanium catalyst was added to increase the temperature to 245 ° C. while gradually reducing the pressure of the reaction system to 1 mmHg to prepare a thermoplastic polyether ester elastomer according to Comparative Examples 1 to 3.

As can be seen from the results of Tables 1 and 2, the thermoplastic polyether ester elastomers of Examples 1 to 9 according to the present invention (furan dicarboxylic compound or furan dicarboxylic compound as a dicarboxylic compound and TPEE) containing a combination of aromatic dicarboxyl compounds and containing anhydrosugar alcohol-alkylene glycol within a range of 1 to 40% by weight, while maintaining physical properties such as hardness and pyrolysis temperature, It is further improved, and it can be seen that the melting point of the elastomer is easily adjusted in the lower range.

That is, in Examples 1 to 9 according to the present invention, while maintaining the viscosity, elasticity and physical properties (for example, hardness and pyrolysis temperature, etc.), which are important properties of the elastomer at the same level, while improving environmental friendliness, The melting point required in the molding process of the final product can be easily controlled, but in the case of Comparative Example 1 (TPEE not containing a furan dicarboxylic compound and anhydrosugar alcohol-alkylene glycol) according to the present invention The environmental friendliness was remarkably poor, the melting point was very high, and in Comparative Example 2 (TPEE containing no furan dicarboxylic compound), the melting point was very high, and in Comparative Example 3 (range of more than 40% by weight). TPEE) containing anhydrosugar alcohol-alkylene glycol, the crystalline portion disappears, it can be seen that the melting point is not measured.

Measurement of physical properties of the thermoplastic elastomer prepared in Examples and Comparative Examples was carried out as follows.

(1) Eco-friendliness (wt%): Based on the total weight of the polyether ester elastomer, the weight% of the anhydrous sugar alcohol (isosorbide), which is an eco-friendly monomer, was measured.

(2) Intrinsic Viscosity (IV): The polyether ester elastomer was dissolved in phenol / tetrachloroethane (weight ratio 50/50) to form a 0.5 wt% solution, and then measured at 35 ° C. with a Uberod viscometer.

(3) Melting | fusing point: It measured after heating up after cooling up at the temperature increase rate of 10 degreeC per minute using a thermal differential scanning calorimeter (DSC).

(4) Hardness: The hardness was measured by a Showa D hardness tester manufactured by Handpi.

(5) T _d (° C.): The temperature at the time of 5% by weight reduction was measured using a thermogravimetric analyzer (TGA-7 from Perkin-Elmer).

Claims (17)

A thermoplastic polyether ester elastomer composed of hard and soft segments,
The hard segment comprises a dicarboxylic compound and an aliphatic diol component as polymerized units,
The soft segment comprises a dicarboxylic compound and a glycol component as polymerized units,
The glycol component comprises anhydrosugar alcohol-alkylene glycol,
Wherein the dicarboxyl compound is a furan dicarboxylic compound or a combination of a furan dicarboxylic compound and an aromatic dicarboxyl compound,
Thermoplastic polyether ester elastomers. The method of claim 1, wherein the furan dicarboxylic compound is dimethyl-2,3-furan dicarboxylate, dimethyl-2,4-furan dicarboxylate, dimethyl-3,4-furan dicarboxylate, dimethyl -2,5-furan dicarboxylate, 2,3-furan dicarboxylic acid, 2,4-furan dicarboxylic acid, 3,4-furan dicarboxylic acid, 2,5-furan dicarboxylic acid , Diethyl-2,3-furan dicarboxylate, diethyl-2,4-furan dicarboxylate, diethyl-3,4-furan dicarboxylate, diethyl-2,5-furan dicar Carboxylate, dipropyl-2,3-furan dicarboxylate, dipropyl-2,4-furan dicarboxylate, dipropyl-3,4-furan dicarboxylate, dipropyl-2,5-furan A thermoplastic polyether ester elastomer, which is a dicarboxylate, or a mixture of two or more thereof. The method of claim 1 wherein the aromatic dicarboxyl compound is terephthalic acid, isophthalic acid, 1,5-dinaphthalene dicarboxylic acid, 2,6-dinaphthalene dicarboxylic acid, dimethyl terephthalate, dimethyl isophthalate or a combination thereof. A thermoplastic polyether ester elastomer, selected from the group consisting of: The thermoplastic polyether ester elastomer according to claim 1, wherein the aliphatic diol component is a linear aliphatic diol having 2 to 8 carbon atoms or a cyclic aliphatic diol having 3 to 8 carbon atoms. The group of claim 1 wherein the aliphatic diol component consists of ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, or a combination thereof. Thermoplastic polyether ester elastomer. The thermoplastic polyether ester elastomer according to claim 1, wherein the anhydrosugar alcohol-alkylene glycol is an adduct obtained by reacting a hydroxyl group and an alkylene oxide at both or one ends of the anhydrosugar alcohol. The thermoplastic polyether ester elastomer of claim 6, wherein the anhydrosugar alcohol is selected from the group consisting of isosorbide, isomannide, isoidide or combinations thereof. 7. The thermoplastic polyether ester elastomer of claim 6, wherein the alkylene oxide is a linear or branched alkylene oxide of 2 to 8 carbon atoms. The thermoplastic polyether ester elastomer of claim 6, wherein the anhydrosugar alcohol is isosorbide and the alkylene oxide is ethylene oxide, propylene oxide or a combination thereof. The thermoplastic polyether ester elastomer according to claim 1, wherein the anhydrosugar alcohol-alkylene glycol is a compound represented by the following general formula (1):
[Formula 1]

In Chemical Formula 1,
R ¹ and R ² each independently represent a linear or branched alkylene group having 2 to 8 carbon atoms or 3 to 8 carbon atoms,
m and n each independently represent an integer of 0 to 15,
m + n represents the integer of 1-30. The compound of claim 10, wherein R ¹ and R ² each independently represent an ethylene group, a propylene group, or an isopropylene group, m and n each independently represent an integer of 1 to 14, and m + n is an integer of 2 to 15; Thermoplastic polyether ester elastomers. The thermoplastic polyether ester elastomer of claim 1, wherein the isosorbide-alkylene glycol content in 100 wt% of the thermoplastic polyether ester elastomer is 1 wt% to 40 wt%. The thermoplastic polyether ester elastomer of claim 1, wherein the glycol component included as polymerized units in the soft segment further comprises polyalkylene ether glycol. The thermoplastic polyether ester elastomer of claim 13, wherein the polyalkylene ether glycol is selected from the group consisting of polyethylene ether glycol, polypropylene ether glycol, polytetramethylene ether glycol or combinations thereof. The thermoplastic polyether ester elastomer of claim 1, wherein the soft segment content in 100 wt% of the thermoplastic polyether ester elastomer is from 5 wt% to 75 wt%. Polycondensation reaction of the dicarboxylic compound and the polyol,
here,
The polyol comprises an aliphatic diol component and a glycol component,
The glycol component comprises anhydrosugar alcohol-alkylene glycol,
Wherein the dicarboxyl compound is a furan dicarboxylic compound or a combination of a furan dicarboxylic compound and an aromatic dicarboxyl compound,
Process for the preparation of thermoplastic polyether ester elastomers. A molded article comprising the thermoplastic polyether ester elastomer according to any one of claims 1 to 15.