KR20200077873A - Thermoplastic polyester elastomer resin composition, method for preparing the same and molding products comprising the same - Google Patents

Abstract

The present invention relates to a thermoplastic polyester elastomer resin composition, a method for producing the same, and a molded article including the same. More particularly, the present invention relates to a thermoplastic polyester elastomer resin composition, a method for producing the same, and a molded article including the same, wherein the composition provides an advantage in that initial tensile strength and elongation properties are maintained high for a long period of time even in an environment exposed to brine by improving brine resistance while maintaining existing physical properties by adding a specific brine resistant agent under a lubricant formulation.

Description

Thermoplastic polyester elastomer resin composition and method for manufacturing same, molded article including the same{THERMOPLASTIC POLYESTER ELASTOMER RESIN COMPOSITION, METHOD FOR PREPARING THE SAME AND MOLDING PRODUCTS COMPRISING THE SAME}

The present invention relates to a thermoplastic polyester elastomer resin composition, a method for manufacturing the same, and a molded article comprising the same, a thermoplastic polyester elastomer resin composition having improved salt water resistance while maintaining the existing physical properties by adding a specific salt water agent under a lubricant formulation, a method for manufacturing the same, and It relates to a molded article comprising this.

In the field of automobiles, crosslinked rubber formed by adding a vulcanizing agent to natural rubber or synthetic rubber has been used as a main material, but recently, crosslinked rubber parts have been replaced with plastic products due to demands such as weight reduction and eco-friendliness. Accordingly, utilization of thermoplastic elastomer materials having a low specific gravity, good processability and recyclability is increasing.

Constant Velocity Joint Boots (CVJ boots) for automobiles are parts that are connected to complex structures and are exposed to environments with flexibility, high temperature, high pressure, and high vibration. Flexibility, cushioning effect, and other structures for freedom of design and assembly It is necessary to have the bonding property, adhesiveness, and heat resistance at the same time, and the material is smooth, and low noise, salt resistance, grease resistance, etc. are required.

The thermoplastic polyester elastomer corresponds to one of a group of materials capable of satisfying these required properties. In order to apply this to CVJ boots, a lubricant is essential to reduce friction and reduce noise in a high pressure and high vibration environment when compounding, and there is a problem in that salt water resistance decreases.

Therefore, when compounding a thermoplastic polyester elastomer, there is a need to develop a material capable of improving salt resistance while prescribing a lubricant.

Korea Patent Publication 2008-0061628 A

In order to solve the problems of the prior art as described above, an object of the present invention is to provide a thermoplastic polyester elastomer resin composition having improved salt water resistance while maintaining high existing physical properties by adding a specific salt water agent under a lubricant formulation.

In addition, an object of the present invention is to provide a method for producing the thermoplastic polyester elastomer resin composition and a molded article comprising the same.

The above and other objects of the present invention can be achieved by the present invention described below.

In order to achieve the above object, the present invention includes 100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain extender, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt resistant agent, wherein the salt resistant agent It provides a thermoplastic polyester elastomer resin composition characterized in that it is a polyester-modified siloxane.

In addition, the present invention includes the step of extruding comprising 100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain stabilizer, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt resistant agent, wherein the salt resistant agent is poly It is an object to provide a method for producing a thermoplastic polyester elastomer resin composition, characterized in that it is an ester-modified siloxane.

In addition, an object of the present invention is to provide a molded article comprising the thermoplastic polyester elastomer resin composition.

The thermoplastic polyester elastomer resin composition according to the present invention provides an advantage of improved salt water resistance while securing friction resistance and low noise properties by adding a specific salt water agent under the formulation of a lubricant, especially when initial tensile strength and elongation properties are exposed to salt water It provides the advantage of maintaining high for a long period of time even under the environment, and can provide properties suitable for manufacturing constant velocity joint boots.

1 is a photograph showing the shape of a specimen prepared according to an embodiment of the present invention.
2 is a photograph showing the appearance and surface of the specimen according to Comparative Example 3 and the specimen in a normal state.

Hereinafter, the thermoplastic polyester elastomer resin composition of the present description will be described in detail.

The present inventors, in order to solve the above-mentioned problems of the prior art, when compounding, including a thermoplastic polyester elastomer resin and a lubricant, when adding a polyester-modified siloxane as a salt-resistant agent within a specific range, abrasion resistance, abrasion resistance, low noise properties It was confirmed that the problem of lowering the salt water resistance due to the conventional lubricant formulation was improved by maintaining the back high while maintaining the high water level, and further sold out on the basis of this to complete the present invention.

The thermoplastic polyester elastomer resin composition of the present invention is characterized in that it comprises 100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain extender, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt water resistant agent. However, the salt-resistant agent may be characterized in that it is a polyester-modified siloxane, and in this case, it provides an advantage that the salt-resistant property is improved under a lubricant formulation.

Hereinafter, each constituent component constituting the resin composition of the present description will be described in detail.

Thermoplastic polyester elastomer resin

The thermoplastic polyester elastomer resin is a thermoplastic elastomer comprising an aromatic dicarboxylic acid or an ester-forming derivative thereof and a crystalline hard segment formed from an aliphatic diol, and a soft soft segment formed from a polyalkylene oxide.

The crystalline hard segment and the soft soft segment may be randomly arranged, for example.

The thermoplastic polyester elastomer resin may be, for example, prepared by melt polymerization of an aromatic dicarboxylic acid or an ester-forming derivative thereof, an aliphatic diol, and a polyalkylene oxide, in which case flexibility, mechanical strength, and heat resistance are high, and balance is high. It can provide excellent advantages.

The thermoplastic polyester elastomer resin may be prepared by further solid-phase polymerization of the resin produced by the melt polymerization, and in this case, while providing excellent physical properties such as flexibility, mechanical strength, and heat resistance, excellent moldability. .

The aromatic dicarboxylic acid may be, for example, one or more selected from terephthalic acid, isophthalic acid, 2,6-naphthalene dicarboxylic acid, 1,5-naphthalene dicarboxylic acid and 1,4-cyclohexane dicarboxylic acid , It may be preferably selected from terephthalic acid or isophthalic acid.

The ester-forming derivative of the aromatic dicarboxylic acid may be, for example, one or more selected from dimethyl terephthalate, dimethyl isophthalate, 2,6-dimethyl naphthalene dicarboxylate and dimethyl 1,4-cyclohexane dicarboxylate, , Preferably dimethyl terephthalate or dimethyl isophthalate.

The aromatic dicarboxylic acid or an ester-forming derivative thereof may be included in an amount of 25 to 65% by weight, preferably 45 to 65% by weight, based on the total weight of the thermoplastic polyester elastomer resin, and react within this range Excellent balance provides easy reaction and excellent physical properties.

The aliphatic diol may be, for example, a diol having a number average molecular weight of 300 g/mol or less or 62 to 300 g/mol, preferably ethylene glycol, propylene glycol, 1,2-propanediol, 1,3-propanediol, 1 ,4-butanediol, 1,5-pentanediol, 1,6-hexanediol and 1,4-cyclohexanedimethanol may be at least one selected from, and more preferably 1,4-butanediol.

In the present description, the number average molecular weight of the aliphatic diol can be measured at 40° C. by gel permeation chromatography (GPC) after dissolving the sample in tetrahydrofuran as an example, unless otherwise specified, wherein polystyrene is used as a standard material. Can.

The aliphatic diol may be included, for example, in an amount of 20 to 40% by weight or 25 to 35% by weight based on the total weight of the thermoplastic polyester elastomer resin, and within this range, the reaction may proceed smoothly, and properties such as flexibility, mechanical strength, etc. The balance is excellent.

The polyalkylene oxide is composed of a soft soft segment of an aliphatic polyester, for example, polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol, polyhexamethylene glycol, copolymers of ethylene oxide and propylene oxide, polypropylene glycol It may be one or more selected from ethylene oxide addition polymers and copolymers of ethylene oxide and tetrahydrofuran, preferably polytetramethylene glycol.

The polyalkylene oxide may be included in an amount of 10 to 50% by weight or 15 to 45% by weight based on the total weight of the thermoplastic polyester elastomer resin, and excellent flexibility in this range, but also excellent mechanical strength and heat resistance, physical properties balance Is excellent

The polyalkylene oxide preferably has a number average molecular weight of 600 to 3000 g/mol or 1000 to 2000 g/mol as an example, and within this range, a polymerization reaction is stable and a thermoplastic polyester elastomer resin having excellent physical property balance can be obtained. have.

The number average molecular weight of the polyalkylene oxide may be measured at 40° C. by gel permeation chromatography (GPC) after dissolving the sample in tetrahydrofuran as an example, unless otherwise specified, wherein polystyrene is used as a standard material. Can.

The thermoplastic polyester elastomer resin may have a melt index (230° C., 10 kg) of 1 to 10 g/10 min or 3 to 8 g/10 min as an example, and has excellent moldability within this range.

Unless otherwise specified in this description, the melt index can be measured under the conditions specified in ASTM D1238 at 230°C and a load of 10 kg.

The thermoplastic polyester elastomer resin may have, for example, Shore D hardness of 30 to 50 or 35 to 45, and excellent flexibility and mechanical strength of the composition within this range.

Shore D hardness can be measured according to the method specified in ASTM D2240, unless otherwise specified in this description.

Chain extender

The thermoplastic polyester elastomer resin composition of the present disclosure is added with a chain extender to ensure durability and heat resistance of the composition, and the chain extender is, for example, 0.05 to 1 part by weight based on 100 parts by weight of the polyester elastomer resin, 0.1 to 0.7 It is included in parts by weight or 0.2 to 0.5 parts by weight, and within this range, moldability of the composition may be improved without adversely affecting the resin composition.

The chain extender may be, for example, 2,2'-(1,3-phenylene) bis(2-oxazoline) [2,2'-(1,3-phenylene) bis(2-oxazoline)], , In this case, the molecular weight may be increased, and an increase in melt viscosity may provide an advantage of improving moldability.

Glide

The thermoplastic polyester elastomer resin composition of the present disclosure includes a lubricant to secure friction resistance, abrasion resistance, and low noise characteristics, and the lubricant is 0.1 to 1 part by weight and 0.3 to 0.8 parts by weight based on 100 parts by weight of the polyester elastomer resin. Part, 0.5 to 0.8 parts by weight or 0.3 to 0.6 parts by weight may be included, without being adversely affecting the physical properties of the composition within this range, it can be implemented in abrasion resistance, wear resistance and low noise characteristics.

The lubricant may include, for example, an amide-based lubricant.

The amide-based lubricant is, for example, stearamide, behanamide, ethylene bis(stearamide), ethylene bis 12-hydroxy steramide [N,N'-ethylene bis (12-hydroxy stearamide)], erucamide, oleamide, and the like.

As another example, the lubricant may include an amide-based lubricant and a product manufactured by Croda Incroslip SL, and in this case, abrasion resistance, abrasion resistance, and low noise characteristics may be realized without adversely affecting the properties of the composition.

As a specific example, the lubricant is a mixture of 0.3 to 0.6 parts by weight of ethylene bis 12-hydroxy steramide and 0.2 to 0.5 parts by weight of Croda's Incroslip SL based on 100 parts by weight of a polyester elastomer resin; Or ethylene bis stearamide 0.4 to 0.6 parts by weight; may be, in this case, the resin composition is excellent in abrasion resistance, abrasion resistance and low noise characteristics.

Salt-resistant

The thermoplastic polyester elastomer resin composition of the present invention is for the purpose of improving the problem that the salt water resistance decreases due to the formulation of the lubricant, 1 to 4.3 parts by weight, 1.5 to 4.3 parts by weight of the salt water agent based on 100 parts by weight of the thermoplastic polyester elastomer resin , 2 to 4 parts by weight or 3 to 4 parts by weight is added, and within this range, salt water resistance may be improved without adversely affecting the physical properties of the composition.

The salt-resistant agent may be characterized by being a polyester-modified siloxane, which exhibits structurally polarity, and thus has excellent compatibility with a polyester elastomer resin, thereby contributing to improving salt resistance while maintaining high basic physical properties of the composition. .

In the polyester-modified siloxane, for example, the main chain is polydimethylsiloxane, and the organic group of the polydimethylsiloxane is substituted with polyester, polydimethylsiloxane is used as the main chain, and polyester may be included as the side chain. In this case, the compatibility with the polyester elastomer resin is further improved to provide an advantage that the salt resistance is improved while maintaining a high physical property balance.

The polyester-modified siloxane may be a polyester-modified siloxane having a hydroxy group at the terminal, and in this case, compatibility with a polyester elastomer resin is more excellent, thereby maintaining a high overall physical property balance and significantly improving salt resistance.

The polyester-modified siloxane may have a melting point of 50 to 55°C or 52 to 55°C, and within this range, there is an advantage of easy compounding with the thermoplastic polyester elastomer resin.

The melting point in this description can be measured by differential scanning calorimetry as an example, unless otherwise specified.

The polyester-modified siloxane may be characterized in that it is in a pellet form, and in this case, it is easy to compound with the thermoplastic polyester elastomer resin, thereby improving productivity.

As another example, a TEGOMER H-Si-6441P product manufactured by Evonik may be used as a salt resistant agent, and in this case, the salt water resistance improving effect is more excellent.

Other additives

The thermoplastic polyester elastomer resin composition of the present disclosure may optionally further contain additives as necessary, and the additives may be, for example, colorants, light stabilizers, heat stabilizers, antioxidants, plasticizers, carbon black, mold release agents, inorganic fillers, and nucleating agents. , Pigments, antistatic agents, crosslinking agents, antibacterial agents, processing aids, metal inactivating agents, anti-friction agents, anti-wear agents, flame retardants, coupling agents, one or more selected from, but not limited to.

The additive may be used within a range that does not deteriorate the effect of the present invention, and is preferably included in 0 to 10 parts by weight, 0.01 to 5 parts by weight, or 0.1 to 3 parts by weight based on 100 parts by weight of the thermoplastic polyester elastomer resin. Can.

For example, the additive may be a thermal stabilizer, and in a preferred example, the thermal stabilizer may be an inorganic thermal stabilizer, and in this case, the thermal stability is improved without adversely affecting the physical properties of the composition.

The inorganic thermal stabilizer may be, for example, one or more selected from copper iodide or potassium iodide.

The inorganic thermal stabilizer may be included, for example, 0.05 to 0.3 parts by weight, 0.1 to 0.2 parts by weight, preferably 0.1 to 0.15 parts by weight, and provides an advantage in that thermal stability is improved while the composition has excellent physical property balance. do.

Hereinafter, a method of manufacturing the thermoplastic polyester elastomer resin composition of the present substrate will be described. The manufacturing method includes all the technical features of the above-mentioned thermoplastic polyester elastomer resin composition, and the description overlapping with the above will be omitted.

The manufacturing method of the thermoplastic polyester elastomer resin composition of the present disclosure includes, for example, 100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain extender, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt water resistant agent. It includes a step, but the salt-resistant agent may be characterized in that it is a polyester-modified siloxane, in this case provides the advantage of improving salt resistance even under the lubricant formulation.

The extrusion may use an extruder of a type commonly used in the art, and a single-screw extruder or a twin-screw extruder may be used as a preferred example.

The extrusion is, for example, a temperature range of 200 to 300°C or 210 to 250°C; And it can be performed under a rotational speed of 100 to 600rpm or 200 to 400rpm, within this range is excellent extrusion efficiency and physical properties of the composition.

The thermoplastic polyester elastomer resin composition obtained through the extrusion may be prepared into pellets, optionally using a pelletizer, if necessary.

Furthermore, the resin composition may be manufactured into molded products in various industrial fields through injection molding.

The molded article of the present substrate may be characterized by including the thermoplastic polyester elastomer resin composition, for example, the molded article may be an automobile part, more preferably a constant velocity joint boot.

The molded article provides physical properties suitable for constant velocity joint boots by including the resin composition of the present invention having improved abrasion resistance, friction resistance, and low noise characteristics and improved salt water resistance due to lubricant formulation.

In describing the thermoplastic polyester elastomer resin composition of the present disclosure, a method for manufacturing the same, and a molded article containing the same, other additives not explicitly described, manufacturing process conditions, manufacturing facilities, etc. are within the range generally practiced in the art. It can be appropriately selected from, and is not particularly limited.

Hereinafter, a preferred embodiment is provided to help the understanding of the present invention, but the following examples are merely illustrative of the present invention, and it is apparent to those skilled in the art that various changes and modifications are possible within the scope and technical scope of the present invention. It is no wonder that such variations and modifications fall within the scope of the appended claims.

Materials used in the following examples and comparative examples are as follows.

A) Thermoplastic polyester elastomer resin

Polybutylene terephthalate is used as a hard segment, polytetramethylene ether glycol is used as a soft segment, and a melt index (230°C, 10 kg) of 5.6 g/10min is used. LG2's BT2140DK1 with Shore D hardness of 39 is used. Did.

B) Chain extender

2,2'-(1,3-phenylene) bis(2-oxazoline) (hereinafter referred to as '1,3-PBO') was used.

C) Glide

C1) Ethylene bis 12-hydroxy steramide (hereinafter referred to as'EBHS')

C2) Products of Croda Incroslip SL

C3) Ethylene bis-steramide (hereinafter referred to as'EBS')

D) Salt-resistant

A polyester-modified siloxane having a hydroxy group at the end was used, and a pellet-type product having a melting point of 54°C (manufactured by Evonik's TEGOMER H-Si-6441P) was used.

E) Other additives

As an inorganic thermal stabilizer, 0.1 part by weight of copper iodide (CuI) and 0.05 part by weight of potassium iodide (KI) were added.

[ Example And Comparative example ]

Blended according to the ingredients and contents shown in Table 1 below, and extruded using a twin screw extruder (using TEK20 from SMPLATEK) (extrusion conditions: 230°C, 300 rpm), and pellets were obtained using a pelletizer. The prepared pellets were injected into a square disk having a thickness of 2 mm (injection condition: 230° C., injection speed of 70 mm/min), and a specimen in the form of a dumbbell (produced according to the type 2 standard specified in ISO 37) was prepared for physical properties. The shape of the specimen is shown in FIG. 1. In FIG. 1, the left side of the arrow is an injection product in the form of a square disk having a thickness of 2 mm, and the right side of the arrow is a dumbbell-shaped specimen prepared therefrom.

A B C1 C2 C3 D E Example One 100 0.2 0.5 0.3 - 2.0 0.1/0.05 Example 2 100 0.2 - - 0.5 2.0 - Example 3 100 0.2 - - 0.5 4.0 - Comparative example One 100 0.2 0.5 0.3 - - 0.1/0.05 Comparative example 2 100 0.2 0.5 0.3 - 0.5 0.1/0.05 Comparative example 3 100 0.2 - - 0.5 5.0 -

(In Table 1, the units of the content of each component are parts by weight, and the contents of the B to E components are based on 100 parts by weight of the A component.)

[ Test example ]

The physical properties of the specimens prepared in Examples and Comparative Examples were measured by the following methods, and the results are shown in Table 2 and FIG. 2 below. 2 is a photograph showing that the surface state of the specimen prepared with the same composition as Comparative Example 3 is compared with the specimen in the normal state.

* Elongation And tensile strength

Elongation at break point of a dumbbell-shaped specimen prepared as above using a universal material tester under a condition of a temperature of 23°C and a humidity of 50% under a method specified in ISO 37 under a tensile speed of 5 cm/min (unit: %). And tensile strength (unit: MPa).

* Salt resistance

The salt water resistance is immersed in a dumbbell-shaped specimen in an autoclave containing an aqueous solution of CaCl ₂ at a concentration of 25% by weight, stored for 2 weeks at a temperature of 100° C., and the elongation and tensile strength measured in the same manner and conditions as described above at intervals of one week. Based on this, the elongation and tensile strength retention were calculated and analyzed. The higher the retention rate, the lower the elongation and tensile strength, which means that the initial measurement value is maintained, and thus it can be judged to have strong resistance to salt water.

Properties Early ^a 1 week
lapse Retention rate 1 ^b
[%] 2 weeks
lapse Retention rate 2 ^c
[%] Example One Tensile strength [Mpa] 19.1 17.1 89.1 14.5 75.5 Elongation [%] 268.3 241.9 90.2 226.0 84.2 Example 2 Tensile strength [Mpa] 20.4 17.3 85.0 14.2 69.7 Elongation [%] 262.8 274.3 104.4 213.6 81.3 Example 3 Tensile strength [Mpa] 17.3 15.9 92.4 13.5 78 Elongation [%] 217.2 229.3 105.6 194.3 89.5 Comparative example One Tensile strength [Mpa] 19.7 17.0 86.1 14.2 71.7 Elongation [%] 255.9 252.7 98.7 195.4 76.3 Comparative example 2 Tensile strength [Mpa] 19.4 16.9 87.1 14.1 72.6 Elongation [%] 250.6 245.7 98.0 196.8 78.5 Comparative example 3 Tensile strength [Mpa] 15.2 - - - - Elongation [%] 180.3 - - - -

(In Table 1, the initial ^a tensile strength and elongation represents the tensile strength and elongation of the specimen measured before dipping in salt water, and the retention rate 1 ^b is the ratio of the elongation and tensile strength after 1 week of salt water resistance measurement compared to the initial elongation and tensile strength. Is calculated as a percentage, and the retention rate 2 ^c is a percentage of the elongation and tensile strength after two weeks of salt water resistance measurement compared to the initial elongation and tensile strength.)

Referring to Table 2, it can be seen that Examples 1 to 3 in which the lubricants and salt-resistant agents were prescribed according to the present invention have a higher tensile strength and elongation retention rate than Comparative Example 1 in which a salt-resistant agent was not prescribed. It was confirmed that the retention strength of the tensile strength and elongation was better than that of the comparative example toward the second week, and it could be confirmed that the problem of lowering the salt resistance due to the conventional lubricant formulation can be effectively improved.

Specifically, when comparing the results of Example 1 and Comparative Example 1, it can be seen that the 2nd week tensile strength and elongation retention rate of Example 1, which prescribed 2 parts by weight of the salt water resistant agent, were high, so that the salt water resistance was improved, and Examples 2 and 3 From it can be seen that when the content of the salt-resistant agent is increased from 2 parts by weight to 4 parts by weight, the second week tensile strength and elongation retention are further improved.

In addition, when looking at the results of Comparative Example 2, when a small amount of the salt water resistance agent is applied, the effect of improving salt water resistance is very weak compared to Comparative Example 1 where no salt water agent is prescribed, and other conditions except the salt water agent prescription amount are equal. It was confirmed that the salt resistance was inferior to that of Example 1.

On the other hand, Figure 2 is a photograph showing the appearance and surface of the specimen according to Comparative Example 3 and the steady-state specimen, referring to this, the square disk specimen of Comparative Example 3 with an excessive amount of salt-resistant agent is excessively curved compared to the specimen in the normal state You can see what is bad. 2, the surface of the specimen of Comparative Example 3 is uneven due to phase separation, and it is confirmed that the surface of the specimen appears white due to a blooming phenomenon that is excessively used with a lubricant and a salt-resistant agent. have.

In addition, the initial tensile strength and elongation of Comparative Example 3 due to the poor appearance and surface conditions as described above, except for the prescription amount of the salt-resistant agent, it can be confirmed that the conditions are very poor compared to Examples 2 and 3, and the salt water resistance evaluation It was impossible.

Claims (11)

100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain extender, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt resistant agent,
The salt-resistant agent is a polyester-modified siloxane, characterized in that
Thermoplastic polyester elastomer resin composition. According to claim 1,
The polyester-modified siloxane is characterized in that the melting point is 50 to 55 ℃
Thermoplastic polyester elastomer resin composition. According to claim 1,
The polyester-modified siloxane is characterized in that the pellet form
Thermoplastic polyester elastomer resin composition. According to claim 1,
The polyester-modified siloxane is characterized in that the polyester-modified siloxane having a hydroxyl group at the terminal
Thermoplastic polyester elastomer resin composition. According to claim 1,
The lubricant is characterized in that it comprises an amide-based lubricant
Thermoplastic polyester elastomer resin composition. According to claim 1,
The thermoplastic polyester elastomer resin is characterized in that the melt index (230 ℃, 10kg) is 1 to 10g/10min
Thermoplastic polyester elastomer resin composition. According to claim 1,
The thermoplastic polyester elastomer resin is characterized in that the Shore D hardness is 30 to 50
Thermoplastic polyester elastomer resin composition. According to claim 1,
The chain extender is 2,2'-(1,3-phenylene) bis(2-oxazoline) [2,2'-(1,3-phenylene) bis(2-oxazoline)]
Thermoplastic polyester elastomer resin composition. According to claim 1,
The composition is characterized in that it further comprises 0.05 to 0.3 parts by weight of an inorganic thermal stabilizer
Thermoplastic polyester elastomer resin composition. Extruding comprising 100 parts by weight of a thermoplastic polyester elastomer resin, 0.05 to 1 part by weight of a chain extender, 0.1 to 1 part by weight of a lubricant, and 1 to 4.3 parts by weight of a salt resistant agent,
The salt-resistant agent is a polyester-modified siloxane, characterized in that
Method for producing a thermoplastic polyester elastomer resin composition. It characterized in that it comprises a composition of any one of claims 1 to 9
Molded article.

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