KR102554964B1 - Heat-resistant resin composition and manufacturing method of heat-resistant resin products using the same - Google Patents

Abstract

The present invention provides a heat-resistant resin composition containing a poly(phenylene ether) (PPE) resin, permanently dissipative polymer (IDP), carbon black, and conductive fiber. The purpose of the present invention is to provide the heat-resistant resin composition which maintains the characteristics of PPE, has high heat resistance, and has excellent tensile strength, elongation, flexural strength, flexural modulus, and impact strength.

Description

Heat-resistant resin composition and manufacturing method of heat-resistant resin products using the same

The present invention relates to a heat-resistant resin composition and a method for manufacturing a heat-resistant resin product using the same.

While plastic materials are inferior in heat resistance and flame retardancy compared to metal or ceramic materials, they are light and have excellent workability, and are widely used in household goods, automobiles, electricity, electronics, and industrial fields.

For example, polyamide (PA) resin is a linear polymer material in which repetition of amide bonds (-CO-NH-) forms the main chain, and is also called nylon resin, and has mechanical properties, particularly chemical resistance, impact resistance, and abrasion resistance. It is excellent and is widely used among engineering plastics with excellent properties than general commodity plastics.

In addition, polyphenylene ether (PPE) or polyphenylene oxide (PPO), which has the same meaning, has a high heat deformation temperature (HDT), dimensional stability, flame retardancy, electrical properties and mechanical properties. Because of its excellent properties, it is widely used as a material for engineering plastics.

The plastic resin, in particular PPE or PPO resin, has better properties when used together with other plastic materials than when used alone. In this way, when used together with other resins, it is possible to compensate for the disadvantages of each constituent resin to satisfy the physical properties required according to the intended use.

For example, when PPE is used together with resins such as polystyrene (PS) and polyamide (PA), physical properties such as impact resistance and chemical resistance of PS and PA can be obtained in addition to the physical properties of PPE. In particular, the combination of PPE/PA is known to be able to express physical properties such as heat resistance, impact resistance, chemical resistance and dimensional stability in a balanced way, and is applied to exterior materials such as golf carts, motorcycles, automobiles, housings of electric and electronic products, etc. in use

However, despite these advantages, due to the heat resistance limitations of the existing plastic materials themselves, PPE/PS and PPE/PA blend resins are used in processes performed at high temperatures of 185 ° C or higher or 195 ° C or higher, such as online painting (on-line painting). It is not only difficult to apply to the line painting) process, but even if applied, there is a problem in that the process must be performed at a temperature lower than the above temperature (Korean Patent Publication No. 2016-0121383).

Therefore, there is a need for research on plastic materials that have higher heat resistance and can be applied to various uses. In addition, if it exhibits excellent mechanical strength at the same time, it will be applicable to various environments.

Republic of Korea Patent Publication No. 10-2016-0121383

The present invention has been made to solve the above problems, and an object of the present invention is to maintain the characteristics of polyphenylene ether, but to have high heat resistance, and to have excellent tensile strength, elongation, flexural strength, flexural modulus, and impact strength. To provide a heat-resistant resin composition having a.

The object of the present invention is not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention

A heat-resistant resin composition comprising a polyphenylene ether (PPE) resin, a permanent antistatic agent (IDP), carbon black, and conductive fibers is provided.

In addition, the heat-resistant resin composition,

Poly(phenylene ether) (PPE) resin, polyamide (PA) resin, polymer resin represented by Formula 1 below, inherently dissipative polymer (IDP), flame retardant, carbon black and conductivity Contains fibers or glass fibers;

The flame retardant is magnesium dihydroxide (MDH), melamine, decabromo diphenyl ethane (DBPE), antimony trioxide (Sb ₂ O ₃ , antimony trioxide, ATO), bisphenol- It is characterized in that at least one selected from the group consisting of bisphenol-A bis diphenyl phosphate (BDP) and resorcinol bis diphenyl phosphate (RDP).

<Formula 1>

(In Formula 1, n is 50-500 and m is 25-30.)

In addition, the conductive fiber includes carbon fiber and a coating layer coated on the surface of the carbon fiber,

The carbon fiber,

Preparing a carbon fiber precursor by heating a polyacrylonitrile (PAN) fiber to a temperature of 300-400 ° C at a heating rate of 1-2 ° C / min in a nitrogen atmosphere and then performing a primary heat treatment for 2-4 hours; Preparing a carbon fiber by heating the carbon fiber precursor to a temperature of 700-800° C. at a heating rate of 4-6° C./min in a nitrogen atmosphere and then subjecting the carbon fiber precursor to a secondary heat treatment for 0.5-2 hours; Oxygen plasma treatment using the carbon fiber; A dispersion containing 1 part by weight of graphene oxide based on 100 parts by weight of the aqueous sulfuric acid solution was prepared by preparing a graphene oxide containing a carboxy group and a 10% by weight sulfuric acid aqueous solution, and then the dispersion was treated with oxygen plasma. After immersing the fibers, reacting at a temperature of 40-60 ° C. for 6-10 hours to coat the carbon fibers treated with oxygen plasma with graphene oxide; and washing the graphene oxide-coated carbon fiber with a detergent containing water and ethanol in a weight ratio of 1:1;

The coating layer,

23-27 parts by weight of a polysiloxane-silazane copolymer represented by Formula 2 below, 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltrisiloxane 3- It is characterized in that it is formed from a composition for forming a coating layer containing 7 parts by weight, 1-5 parts by weight of decamethyl cyclopentasilane and 65-69 parts by weight of dibutyl ether.

<Formula 2>

(In Formula 2, a is 1-20, b is 1-20, p is 1-20, q is 1-5, and r is 1-10.)

In addition, the present invention

Poly(phenylene ether) (PPE) resin, polyamide (PA) resin, polymer resin represented by Formula 1 below, inherently dissipative polymer (IDP), flame retardant, carbon black and conductivity Mixing the fibers and extruding them with an extruder to form pellets; and

After drying the pellets, injecting them into an extruder; Including,

The flame retardant is magnesium dihydroxide (MDH), melamine, decabromo diphenyl ethane (DBPE), antimony trioxide (Sb ₂ O ₃ , antimony trioxide, ATO), bisphenol- A heat-resistant resin composition comprising at least one selected from the group consisting of bisphenol-A bis diphenyl phosphate (BDP) and resorcinol bis diphenyl phosphate (RDP) Provides a manufacturing method for the product.

<Formula 1>

(In Formula 1, n is 50-500 and m is 25-30.)

The heat-resistant resin composition according to the present invention maintains the characteristics of polyphenylene ether, but can have high heat resistance, and exhibits excellent tensile strength, elongation, flexural strength, flexural modulus, and impact strength.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described in this specification may be modified in various ways. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and technical scope of the invention.

Terms including ordinal numbers such as primary, secondary, first, and second may be used to describe various elements, but these elements are not limited by the above-mentioned terms. The terminology described above is only used for the purpose of distinguishing one component from another.

In this specification, terms such as 'comprise' or 'having' are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded. It is understood that when a component is referred to as being 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being 'directly connected' or 'directly connected' to another component, it should be understood that no other component exists in the middle.

In addition, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

the present invention

Provided is a heat-resistant resin composition comprising a polyphenylene ether (PPE) resin, a permanent antistatic agent (IDP), carbon black, and conductive fibers or glass fibers.

Hereinafter, the heat-resistant resin composition according to the present invention will be described in detail.

Examples of the polyphenylene ether resin include poly(2,6-dimethyl-1,4-phenylene) ether, poly(2,6-diethyl-1,4-phenylene) ether, poly(2,6- Dipropyl-1,4-phenylene) ether, poly(2-methyl-6-ethyl-1,4-phenylene) ether, poly(2-methyl6-propyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1, 4-phenylene) ether, poly(2, 6-diphenyl-1, 4-phenylene) ether, poly(2, 6-dimethyl-1, 4-phenylene) ) copolymers of ether with poly(2,3,6-trimethyl-1,4-phenylene)ether, and poly(2,6-dimethyl-1,4-phenylene)ether with poly(2,3, There are copolymers with 6-trimethyl-1,4-phenylene) ether. Among them, copolymers of poly(2,6-dimethyl-1,4-phenylene) ether and poly(2,3,6-trimethyl-1,4-phenylene) ether, and poly(2,6-dimethyl- 1,4-phenylene)ether is preferred, and poly(2,6-dimethyl-1,4-phenylene)ether is more preferred.

As the permanent antistatic agent, polyetherimide, polyetherimideamide, polyetheresteramide-based antistatic agent, etc. may be used, and polyetherimide-based permanent antistatic agent is preferably applied.

In addition, the heat-resistant resin composition includes 38-42 parts by weight of a poly(phenylene ether) (PPE) resin, 13-17 parts by weight of a polyamide (PA) resin, and a polymer resin 13 represented by Formula 1 below. -17 parts by weight, 13-17 parts by weight of an inherently dissipative polymer (IDP), 3-7 parts by weight of a flame retardant, 3-7 parts by weight of carbon black, and 3-7 parts by weight of conductive fibers are preferably included, and poly 39-41 parts by weight of phenylene ether (poly (phenylene ether), PPE) resin, 14-16 parts by weight of polyamide (PA) resin, 14-16 parts by weight of a polymer resin represented by Formula 1 below, permanent antistatic agent (inherently dissipative polymer, IDP) 14-16 parts by weight, flame retardant 4-6 parts by weight, carbon black 4-6 parts by weight, and conductive fibers 4-6 parts by weight are more preferably included.

The polyamide (PA) resin is polyamide 6, polyamide 66, polyamide 46, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6/66, polyamide 6/612, Polyamide MXD6, Polyamide 6/MXD6, Polyamide 66/MXD6, Polyamide 6T, Polyamide 6I, Polyamide 6/6T, Polyamide 6/6I, Polyamide 66/6T, Polyamide 66/6I, Polyamide 6/6T/6I, Polyamide 66/6T/6I, Polyamide 9T, Polyamide 9I, Polyamide 6/9T, Polyamide 6/9I, Polyamide 66/9T, Polyamide 6/12/9T, Polyamide At least one of 66/12/9T, polyamide 6/12/9I, and polyamide 66/12/6I can be applied, and by applying the polyamide resin, price competitiveness and processability (injection, extrusion, etc.) can improve

<Formula 1>

(In Formula 1, n is 50-500 and m is 25-30.)

The polymer resin represented by Chemical Formula 1 is composed of an aromatic polyamide unit and a polyphenylene ether unit, and may be prepared through a polycondensation reaction using dodecanediol as an extender. The polymer resin is a material having a glass transition temperature (T _g ) of 165-175 ° C and a melting temperature (T _m ) of 265-275 ° C, and high heat resistance and mechanical properties are secured at the same time by preparing a heat-resistant resin composition using the same. can do.

The flame retardant may include inorganic flame retardants, phosphorus-based flame retardants, halogen-based flame retardants, heavy metal-based flame retardants, melamine-based flame retardants, and silicon-based flame retardants. For example, magnesium dihydroxide (MDH), melamine, decabromo diphenyl ethane (DBPE), antimony trioxide (Sb ₂ O ₃ , antimony trioxide (ATO)), bisphenol-A bis diphenyl phosphate (BDP) and resorcinol bisdi Phenyl phosphate (resorcinol bis diphenyl phosphate, RDP) and the like can be used. Preferably, antimony trioxide (Sb ₂ O ₃ , antimony trioxide, ATO) is applied, but it is more preferable to apply silane surface-treated antimony trioxide. The silane surface-treated antimony trioxide is applied as a flame retardant to improve heat resistance and flame retardancy.

The conductive fiber preferably includes carbon fiber and a coating layer coated on the surface of the carbon fiber.

The carbon fiber is a carbon fiber precursor by heating polyacrylonitrile (PAN) fibers to a temperature of 300-400 ° C. at a heating rate of 1-2 ° C./min in a nitrogen atmosphere and then performing primary heat treatment for 2-4 hours. Preparing; Preparing a carbon fiber by heating the carbon fiber precursor to a temperature of 700-800° C. at a heating rate of 4-6° C./min in a nitrogen atmosphere and then subjecting the carbon fiber precursor to a secondary heat treatment for 0.5-2 hours; Oxygen plasma treatment using the carbon fiber; A dispersion containing 1 part by weight of graphene oxide based on 100 parts by weight of the aqueous sulfuric acid solution was prepared by preparing a graphene oxide containing a carboxy group and a 10% by weight sulfuric acid aqueous solution, and then the dispersion was treated with oxygen plasma. After immersing the fibers, reacting at a temperature of 40-60 ° C. for 6-10 hours to coat the carbon fibers treated with oxygen plasma with graphene oxide; and washing the graphene oxide-coated carbon fiber with a detergent containing water and ethanol in a weight ratio of 1:1.

First, a polyacrylonitrile (PAN) fiber is heated to a temperature of 300-400 ° C at a heating rate of 1-2 ° C / min in a nitrogen atmosphere, and then subjected to a primary heat treatment for 2-4 hours to prepare a carbon fiber precursor . Preferably, the temperature is raised to a temperature of 330-370 ° C at a heating rate of 1-2 ° C / min, and then the first heat treatment is performed for 2.5-3.5 hours.

Next, the carbon fiber precursor is heated up to a temperature of 700-800° C. at a heating rate of 4-6° C./min in a nitrogen atmosphere and subjected to secondary heat treatment for 0.5-2 hours to prepare carbon fibers. Preferably, the temperature is raised to a temperature of 730-770 ° C at a heating rate of 5 ° C / min, and then the first heat treatment is performed for 0.8-1.2 hours.

Next, an oxygen plasma treatment is performed using the carbon fiber. A uniform functional group can be introduced to the carbon fiber surface through the oxygen plasma treatment. This is a pretreatment process for easily coating graphene oxide at a later stage.

Next, a dispersion containing 1 part by weight of the graphene oxide based on 100 parts by weight of the aqueous sulfuric acid solution is prepared by preparing graphene oxide containing a carboxyl group and a 10% sulfuric acid aqueous solution, and then treating the dispersion with oxygen plasma. After immersing the carbon fiber, the carbon fiber treated with oxygen plasma is coated with graphene oxide by reacting at a temperature of 40-60 ° C. for 6-10 hours.

Since the carbon fiber treated with oxygen plasma contains a functional group such as a hydroxy group, it is easy to undergo a dehydration condensation reaction with a carboxyl group included in graphene oxide.

In addition, the carboxyl group included in the graphene oxide may react with the hydroxyl group included in the carbon fiber in the presence of an acid catalyst to form a new covalent bond.

Even after the graphene oxide is coated on the surface of the carbon fiber, at least some carboxy groups included in the graphene oxide remain in a state that does not participate in the reaction. In addition, the functional groups described above react with oxygen molecules in atmospheric conditions to easily become radicals and generate active oxygen species. As a result, the propagation of gram-negative bacteria or gram-positive bacteria on the surface of the fiber can be delayed or prevented.

Such a reaction may otherwise be referred to as a trans-esterification reaction, and corresponds to a reaction in which an ester group or a hydroxy group is exchanged. Therefore, the coating of graphene oxide is preferably performed by a trans-esterification reaction between a functional group located on the surface of the fiber and a functional group of graphene oxide under an acid catalyst condition.

Trans-esterification as described above can be performed by immersing the fiber in a graphene oxide dispersion and adding an acid as a catalyst. At this time, the acid means a Lewis acid (Lewis acid). A Lewis acid is a species capable of donating electrons, and is a concept including metal salts in addition to sulfuric acid, nitric acid, and hydrochloric acid, and includes zinc cations, iridium cations, and the like.

In addition, the trans-esterification is preferably performed at a temperature of 40-60°C for 6-10 hours. If the temperature condition is less than 40 ℃ or the reaction time is less than 6 hours, there is a significant possibility that the trans-esterification will not proceed sufficiently, and if the temperature condition exceeds 60 ℃ or the reaction time exceeds 10 hours, the fiber damage can be a problem.

Next, the carbon fibers coated with graphene oxide are washed with a detergent containing water and ethanol in a weight ratio of 1:1.

By applying carbon fiber coated with graphene oxide as the carbon fiber, performance such as conductivity and durability is more excellent as a conductive fiber.

The coating layer contains 23-27 parts by weight of a polysiloxane-silazane copolymer represented by Formula 2 below, 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltri It is preferably formed from a composition for forming a coating layer containing 3-7 parts by weight of siloxane, 1-5 parts by weight of decamethyl cyclopentasilane and 65-69 parts by weight of dibutyl ether, polysiloxane represented by the following formula (2) Silazane copolymer 24-26 parts by weight, 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltrisiloxane 4-6 parts by weight, decamethylcyclopenta It is more preferably formed from a composition for forming a coating layer containing 2-4 parts by weight of silane (Decamethyl cyclopentasilane) and 66-68 parts by weight of dibutyl ether.

<Formula 2>

(In Formula 2, a is 1-20, b is 1-20, p is 1-20, q is 1-5, and r is 1-10.)

The composition for forming the coating layer includes the polysiloxane-silazane copolymer represented by Chemical Formula 2 above. The composition for forming the coating layer includes a polysiloxane-silazane copolymer to easily form a coating layer and has excellent solvent resistance and mechanical properties. In Formula 2, a is 5-15, b is 5-15, p is 5-15, q is 2-4, and r is more preferably 3-7.

The composition for forming the coating layer more preferably includes 4-6 parts by weight of 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltrisiloxane. The coating layer is easily formed by including the 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltrisiloxane as the composition for forming the coating layer, and the shrinkage rate and adhesion are excellent. great.

The composition for forming the coating layer more preferably includes 2-4 parts by weight of decamethyl cyclopentasilane. The coating layer is easily formed by including the decamethylcyclopentasilane as the composition for forming the coating layer, and the shrinkage rate and adhesion are excellent.

In addition, the present invention

Poly(phenylene ether) (PPE) resin, polyamide (PA) resin, polymer resin represented by Formula 1 below, inherently dissipative polymer (IDP), flame retardant, carbon black and conductivity Mixing the fibers and extruding them with an extruder to form pellets; and

After drying the pellets, injecting them into an extruder; Including,

The flame retardant is magnesium dihydroxide (MDH), melamine, decabromo diphenyl ethane (DBPE), antimony trioxide (Sb ₂ O ₃ , antimony trioxide, ATO), bisphenol- A heat-resistant resin composition comprising at least one selected from the group consisting of bisphenol-A bis diphenyl phosphate (BDP) and resorcinol bis diphenyl phosphate (RDP) Provides a manufacturing method for the product.

<Formula 1>

(In Formula 1, n is 50-500 and m is 25-30.)

Hereinafter, the present invention will be described in more detail by the following examples.

However, the following examples are merely illustrative of the content of the present invention, but the scope of the invention is not limited by the examples and experimental examples.

<Preparation Example 1> Preparation of conductive fibers

Polyacrylonitrile (PAN) fibers were heated up to 350° C. at a heating rate of 1° C./min in a nitrogen atmosphere and then subjected to primary heat treatment for 3 hours to prepare a carbon fiber precursor. The carbon fiber precursor was heated to a temperature of 750° C. at a heating rate of 5° C./min in a nitrogen atmosphere and then heat-treated for 1 hour to prepare a carbon fiber.

Oxygen plasma-treated carbon fibers were prepared using a plasma device in order to introduce uniform functional groups to the surface of the carbon fibers.

The plasma device is composed of a pressure reducing pump, an aluminum alloy reactor, a gas flow controller, a power supply, and the like, and after putting 1 g of the carbon fiber into a nickel boat, oxygen plasma treatment was performed. The inside of the plasma reactor was converted to a vacuum state using a vacuum pump. Thereafter, plasma treatment was performed with an oxygen gas injection flow rate of 40 sccm. At this time, the reaction time was 10 minutes, the power was 50 W, and the frequency was 50 kHz.

A dispersion containing 1 part by weight of the graphene oxide based on 100 parts by weight of the aqueous sulfuric acid solution was prepared by preparing graphene oxide containing a carboxyl group and a 10% by weight aqueous solution of sulfuric acid. After immersing the oxygen plasma-treated carbon fiber in the dispersion, the reaction is performed at a temperature of 50 ° C. for 8 hours to cause trans-esterification between the functional group located on the surface of the oxygen plasma-treated carbon fiber and the functional group of graphene oxide ( A carbon fiber treated with oxygen plasma was coated with graphene oxide by inducing a trans-esterification reaction. Thereafter, the graphene oxide-coated carbon fibers were washed with a detergent containing water and ethanol in a weight ratio of 1:1 to prepare graphene oxide-coated carbon fibers.

25 parts by weight of the polysiloxane-silazane copolymer represented by Formula 2, 5 parts by weight of 3-ethylmethylamino-3-(trimethylsiloxy)-1,1,1,5,5,5-hexamethyltrisiloxane, A composition for forming a coating layer was prepared by mixing 3 parts by weight of decamethyl cyclopentasilane and 67 parts by weight of dibutyl ether. In Formula 2, n is 10, m is 10, p is 10, q is 3, and r is 5.

After applying the composition for forming a coating layer on the surface of the graphene oxide-coated carbon fiber, heat treatment was performed at a temperature of 90° C. for 5 minutes to prepare a conductive fiber.

<Example 1-2 and Comparative Example 1-2>

In order to uniformly disperse each component of Table 1 below, first, a polyphenylene ether resin (PPE, Bluestar), a polyamide resin (Vydyne, Ascend, polyamide 66), a polymer resin represented by Formula 1 (Formula 1) In 1, a is 100 and b is 28), polyetherimide as a permanent antistatic agent, antimony trioxide (Sb ₂ O ₃ ) treated with silane as a flame retardant, carbon black, carbon fiber or the conductive fiber prepared in Preparation Example 1 above. were mixed and extruded with an extruder (extrusion temperature 310-330 ° C., screw rotation speed 200-250 rpm) to produce pellets. After dehumidifying and drying the pellets at 90 ° C. for 4 hours, specimens were prepared by injecting the pellets at a molding temperature of 310-330 ° C. and a mold temperature of 150 ° C.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 polyphenylene ether resin 40 40 40 40 polyamide resin 15 15 30 30 Polymer resin represented by Formula 1 15 15 - - permanent antistatic agent 15 15 15 15 flame retardant 5 5 5 5 carbon black 5 5 5 5 Conductive fiber of Preparation Example 1 5 - - 5 carbon fiber - 5 5 -

<Experimental Example 1> Analysis of mechanical properties

The physical properties of the specimens prepared in Example 1-2 and Comparative Example 1-2 were measured by the following test method, and the results are shown in Table 2 below.

- Tensile strength and elongation: ASTM D638

- Flexural strength, flexural modulus: ASTM D790

- Izod impact strength (1/4 and 1/8 notch): ASTM D256

tensile strength
(kg/cm ² ) elongation
(%) flexural strength
(kg/cm ² ) flexural modulus
(kg/cm ² ) Izod
impact strength
(kgf cm/cm) Example 1 2450 1.4 3250 142000 7.2 Example 2 2100 1.3 2900 133000 6.4 Comparative Example 1 1540 1.4 2320 89000 4.3 Comparative Example 2 1720 1.4 2460 97000 4.9

As shown in Table 1, it was confirmed that the heat-resistant resin composition according to the present invention exhibits excellent mechanical properties such as tensile strength, flexural strength, flexural modulus, and impact strength. In particular, when the conductive fiber prepared in Preparation Example 1 is used as a conductive fiber, it exhibits very good mechanical properties.

<Experimental Example 2> Heat resistance analysis

For the compositions or specimens prepared in Example 1-2 and Comparative Example 1-2, the moisture absorption, low-load heat deflection temperature, and heat deflection temperature during local heating were measured by the following test methods, and the results are shown in Table 3 below. shown in

The low load heat deformation temperature (HDT) was measured by injection molding each resin composition using a 170-ton electric injection molding machine at an injection temperature of 300 ° C and a mold temperature of 100 ° C. ASTM D648 standard, Edgewise, 6.4 mm * For the 128mm specimen, the low-load heat deflection temperature was measured under the condition of a load of 4.6kgf.

The heat distortion temperature at the time of local heating was tested using the same experimental method as the low-load heat distortion temperature, but the heating part was tested using a torch that forms a flame with a diameter of 10 mm.

The moisture absorption rate was measured by injection molding in the same manner as above under the ISO62 standard, specimen size 60mm * 60mm * 2mm (width * length * thickness), temperature 23 ℃, relative humidity 50% conditions.

HDT(℃) Local heating (℃) Moisture absorption rate (%) Example 1 244 240 1.2 Example 2 232 229 1.2 Comparative Example 1 195 174 1.7 Comparative Example 2 199 185 1.6

As shown in Table 3, in the case of the heat-resistant resin composition according to the present invention, it was found to exhibit a low load HDT of 230 ° C or higher. In particular, when the conductive fiber prepared in Preparation Example 1 was used as a conductive fiber, it was found to show a high low load heat deflection temperature even under local heating as well as its low load index, indicating that it could be used in a high temperature process accompanied by local heating.

Claims (2)

Poly(phenylene ether) (PPE) resin, polyamide (PA) resin, polymer resin represented by Formula 1 below, inherently dissipative polymer (IDP), flame retardant, carbon black and conductivity Mixing the fibers and extruding them with an extruder to form pellets; and
After drying the pellets, injecting them into an extruder; Including,
The flame retardant is at least one selected from the group consisting of inorganic flame retardants, phosphorus-based flame retardants, halogen-based flame retardants, heavy metal-based flame retardants, melamine-based flame retardants and silicon-based flame retardants Manufacturing method of a product containing a heat-resistant resin composition:
<Formula 1>

(In Formula 1, n is 50-500 and m is 25-30). delete