KR20170056140A - Polyamide resin composition and molded products produced therefrom - Google Patents

Polyamide resin composition and molded products produced therefrom Download PDF

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KR20170056140A
KR20170056140A KR1020150159342A KR20150159342A KR20170056140A KR 20170056140 A KR20170056140 A KR 20170056140A KR 1020150159342 A KR1020150159342 A KR 1020150159342A KR 20150159342 A KR20150159342 A KR 20150159342A KR 20170056140 A KR20170056140 A KR 20170056140A
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polyamide resin
weight
compound
styrene
copolymer
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KR1020150159342A
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Korean (ko)
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KR102023517B1 (en
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양재경
김재화
이상록
이수민
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주식회사 엘지화학
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The polyamide resin composition of the present invention comprises (A) 10 to 70% by weight of a polyamide resin; (B) 0.1 to 55% by weight of a vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer resin; (C) 20 to 35% by weight of a polycarbonate resin; (D) 0 to 5% by weight of a styrene-maleimide-based copolymer; And (E) 0 to 10% by weight of a maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer, and to provide an extrusion-processed molded article of the polyamide resin composition having remarkably improved heat resistance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyamide resin composition,

The base material is a polyamide resin composition and relates to a molded article, and more particularly to a polyamide resin, based on the mechanical properties are excellent but the thermal deformation temperature of the heat-resistant to more than 82 ℃ in load 18.6kgf / cm 2 according to ASTM D648 standard An excellent polyamide resin composition and an extrusion processed molded article thereof.

Polyamide resin, which is a kind of engineering plastics, has excellent mechanical strength, abrasion resistance, heat resistance, chemical resistance, electrical insulation and arc resistance and is used in a wide range of applications such as automobiles, electric / electronic parts and industrial materials.

However, in the case of automobile interior and exterior materials, it is required to have excellent heat resistance as well as mechanical properties. For this purpose, a glass type such as glass fiber or glass bead or a glass type such as talc, kaolin, wollastonite or mica A method of mixing a filler, a method of adding an acrylonitrile-butadiene-styrene (ABS) resin to a polyamide resin, a method of adding an additive capable of acting as a nucleating agent, and the like are used. However, when an inorganic filler is added to a polyamide resin, the heat resistance is improved but the toughness is lowered. If the ABS resin is hardened, the elongation and the impact strength are improved, but the increase in heat resistance is limited. A nucleating agent is used to obtain high heat resistance, but there is a problem that it is difficult to obtain a heat resistance of 80 DEG C or more under a high load, and the toughness is still lowered.

Therefore, it is still required to develop a technique for a polyamide resin composition which is excellent in mechanical properties and can greatly improve heat resistance.

Korea Patent No. 0252296

The object of the present invention is to provide a polyamide resin composition having a heat deflection temperature of 82 DEG C or higher at a load of 18.6 kgf / cm < 2 > according to ASTM D648 standard in which a polyamide resin is difficult to reach.

Another object of the present invention is to provide a molded article containing the polyamide resin composition and having excellent mechanical properties and heat resistance remarkably improved.

The above object of the present invention can be achieved by all the present invention described below.

(A) 10 to 70% by weight of a polyamide resin; (B) 0.1 to 55% by weight of a vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer resin; (C) 20 to 35% by weight of a polycarbonate resin; (D) 0 to 5% by weight of a styrene-maleimide-based copolymer; And 0 to 10% by weight of (E) maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer.

The present invention also provides a molded article comprising the polyamide resin composition.

According to the present invention, when an acrylonitrile-butadiene-styrene copolymer is simply incorporated into a polyamide resin, even under a high load of 18.6 kgf / cm 2, which is hardly attainable, There is an effect of providing a polyamide resin composition and a molded article containing the same.

Hereinafter, the present invention will be described in detail.

The polyamide resin composition of the present invention comprises (A) 10 to 70% by weight of a polyamide resin; (B) 0.1 to 55% by weight of a vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer resin; (C) 20 to 35% by weight of a polycarbonate resin; (D) 0 to 5% by weight of a styrene-maleimide-based copolymer; And 0 to 10% by weight of (E) maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer.

As another example, the polyamide resin (A) may be contained in an amount of from 10 to 60% by weight, or from 13 to 45% by weight, and the impact resistance and heat resistance characteristics are excellent within this range.

The polyamide resin (A) may be, for example, a polymer in which cyclic lactam or w-amino acid is condensation polymerized, and another example may be a condensation polymer of diacids and diamines.

Specific examples of the polyamide resin (A) include polycaprolactam (nylon 6), polyhexamethylenediamine adipamide (nylon 6,6), polyhexamethylene sebacamide (nylon 6,10), polyhexamethylenediamine May be at least one selected from lauramide (nylon 6,12), polytetramethylenediamine adipamide (nylon 4,6), and polylauroractam (nylon 12).

As another example, the vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer (B) may be contained in an amount of from 10 to 55% by weight or from 30 to 50% by weight, and the balance between heat resistance and physical properties within this range .

The (B) vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer is not particularly limited, and for example, a rubber core polymerized with a conjugated diene compound; And a shell wrapped around the core and comprising an aromatic vinyl compound and a vinyl cyan compound or an aromatic vinyl compound, a vinyl cyan compound, and an alkyl (meth) acrylate compound.

The aromatic vinyl compound may be at least one selected from the group consisting of styrene,? -Methylstyrene, p-methylstyrene, and vinyltoluene. Specifically, styrene is used, but the present invention is not limited thereto.

The vinyl cyan compound may be at least one selected from the group consisting of acrylonitrile, methacrylonitrile, and ethacrylonitrile, and specifically, acrylonitrile is used, but the present invention is not limited thereto.

Examples of the conjugated diene compound include one selected from the group consisting of 1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene and isoprene And specifically 1,3-butadiene is used, but it is not limited thereto.

The alkyl (meth) acrylate compound may include both an alkyl acrylate-based monomer and an alkyl methacrylate-based monomer.

The alkyl group of the alkyl (meth) acrylate monomer preferably has 1 to 10 carbon atoms, more preferably 1 to 4 carbon atoms, most preferably a methyl group or an ethyl group. The alkyl (meth) acrylate monomer is more preferably methyl methacrylate, but is not limited thereto.

As another example, the polycarbonate resin (C) may be contained in an amount of 20 to 35% by weight, and within this range, there is an effect of excellent tensile strength and thermal stability.

For example, the polycarbonate resin (C) may have a melt index (300 ° C, 1.2 kg) of 3 to 30 g / 10 min, or 10 to 20 g / 10 min. Within this range, Can be provided.

The content of the polyamide resin (A) may be equal to or less than the sum of the contents of (B) the vinyl cyan compound-conjugated diene compound-aromatic vinyl copolymer resin and (C) polycarbonate resin, The characteristics are maximized and the impact strength is excellent.

The weight ratio of the polyamide resin (A) to the polycarbonate resin (C) may be, for example, 1: 0.1 to 5, 1: 0.4 to 3, or 1: 0.45 to 2.35, .

As another example, the (D) styrene-maleimide-based copolymer may be contained in an amount of 0.1 to 5% by weight, or 2 to 5% by weight, and the impact strength and heat resistance are both excellent within this range.

The styrene-maleimide-based copolymer (D) has a high thermal decomposition degree and can improve the compatibility between the polyamide resin and the vinyl cyanide-conjugated diene compound-aromatic vinyl compound copolymer resin.

The styrene-maleimide-based copolymer (D) may be one having a thermal decomposition temperature of 300 ° C or higher, or 300 ° C to 400 ° C, as measured by a thermogravimetric analyzer.

For reference, the pyrolysis degree was measured by heating a specimen cut to a predetermined size using a thermogravimetric analyzer (TGA) from room temperature to 600 ° C at a rate of 20 ° C / min in a nitrogen atmosphere, And then pyrolysis can be carried out.

As a specific example, the styrene-maleimide-based copolymer may be a copolymer of 40 to 60 wt%, or 45 to 55 wt% of a styrene monomer, 40 to 60 wt% of a maleimide monomer, or 45 to 55 wt% .

In another example, (D) the styrene-maleimide-based copolymer comprises 40 to 50% by weight of the styrene-based monomer, 40 to 50% by weight of the maleimide-based monomer, and 0.1 to 10% by weight of the maleic anhydride, 145,000 g / mol of the terpolymer.

The maleimide-based monomer may be at least one selected from methylmaleimide, ethylmaleimide, butylmaleimide, cyclohexylmaleimide, and N-phenylmaleimide.

As another example, the (E) maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer may be contained in an amount of 0.1 to 10% by weight, or 1 to 5% by weight, This has an excellent effect.

The (E) maleic anhydride graft styrene-ethylene-butylene-styrene block For example, the maleic anhydride content of the copolymer may be in the range of 0.1 to 5.0% by weight, 0.5 to 4% by weight, or 1 to 2% by weight in the block copolymer, and excellent balance of physical properties within this range is effective.

The (E) maleic anhydride graft styrene-ethylene-butylene-styrene block The copolymer can improve the compatibility between the polyamide resin and the polycarbonate resin.

The polyamide resin composition may contain additives such as a lubricant, an antioxidant, a light stabilizer, a chain extender, a catalyst, a releasing agent, a pigment, a dye, an antistatic agent, an antibacterial agent, a processing aid, a metal deactivation agent, An inorganic filler, a glass fiber, an anti-friction agent, a wear-resistant agent, and a coupling agent.

For example, the polyamide resin composition may have a heat distortion temperature of 82 ° C or higher, 85 ° C or higher, or 85-130 ° C or higher at a load of 18.6 kgf / cm 2 according to ASTM D648.

The polyamide resin composition may have a tensile elongation of 140% or more, 150% or 150 to 160% according to ASTM D638.

The polyamide resin composition may be a nucleophilic resin, for example. In this case, the term "free nucleophilic agent" as used herein means, in principle, that the nucleophilic agent is not contained at all. For example, 0.01 part by mass or 0.001 part by mass Of the nucleophilic agent.

The polyamide resin composition of the present invention may be optionally mixed with the above additives in a mixer or a super mixer and then mixed with one of various blending machines such as a twin-screw extruder, a uniaxial extruder, a roll mill, a kneader or a Banbury mixer, Kneaded at a temperature of 300 ° C or 200 ° C to 290 ° C, and then extrusion-molded.

The present invention provides a molded article comprising the above-mentioned polyamide resin composition, and can provide an automotive interior and exterior part requiring a heat distortion temperature of 82 ° C or more in addition to mechanical properties.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. Changes and modifications may fall within the scope of the appended claims.

[Example]

Example  1 to 5

The components shown in the following Table 1 were put into a super mixer and kneaded in the stated amounts, and then melt-kneaded using a twin screw extruder at a barrel temperature of 260 캜 and extruded (using a pelletizer) to prepare pellets And dried at an injection temperature of 250 to 280 DEG C to prepare a resin composition specimen using an injection machine.

Comparative Example  1 to 9

Specimens were prepared in the same manner as in Example 1, except that the ingredients shown in Table 2 were used in the stated amounts.

The raw materials used in the above Examples and Comparative Examples are as follows.

* PA (polyamide resin): Polycaprolactam (nylon 6) was used.

ABS (Acrylonitrile-butadiene-styrene): 30.4% by weight of acrylonitrile, 60% by weight of butadiene and 9.6% by weight of styrene

* PC (polycarbonate resin): A polycarbonate having a melt index (300 ° C, 1.2 kg) of 15 g / 10 min

* SMI (Styrene-N-Phenylmaleimide-Maleic anhydride Copolymer): TGA pyrolysis measurement value 350 ° C, weight average molecular weight 135,000 g / mol, styrene 47.5 wt%, maleic anhydride 6.2 wt%, N-phenylmaleimide 46.3 wt% The copolymerized copolymer

SEBS-MAH (maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer): Kraton FG1901X (Shell) with 1.7% by weight maleic anhydride as the functional group,

* F (nucleophilic agent): nano clay (Closite 93A)

* SAN (Polystyrene-co-acrylonitrile): 81HF (LG Chem)

The properties of the specimens prepared in Examples 1 to 5 and Comparative Examples 1 to 9 were measured by the following methods, and the results are shown in Tables 1 and 2 below.

Tensile Strength (kgf / cm 2 ), Tensile Elongation (%): Tensile strength and tensile elongation were measured according to ASTM D638.

Flexural Strength (kg / cm 2 ), Flexural Modulus (kg / cm 2 ): Flexural strength and flexural modulus were measured according to ASTM D790 standard.

Izod impact strength (1/4 notched at 23 占 폚, kgf 占 / m / cm): Measured according to ASTM D256 standard.

* HDT (heat distortion temperature, 18.6 kgf / 占 폚 占 폚): measured according to ASTM D648 standard.

division Example 1 Example 2 Example 3 Example 4 Example 5 PA 23.0 13.0 41.0 18.0 28.0 ABS 47.0 47.0 32.0 47.0 47.0 PC 20.0 30.0 20.0 25.0 20.0 SMI 5.0 5.0 2.0 5.0 5.0 SEBS 5.0 5.0 5.0 5.0 - Nucleophilic agent - - - - - The tensile strength 384 420 435 400 410 Tensile elongation 158 150 150 150 140 Flexural strength 558 600 647 585 590 Flexural modulus 17,020 18,100 18,920 17,800 18,000 Impact strength 30 45 20 38 23 HDT 100 120 85 115 105

division Comparative Example
One Comparative Example
2 Comparative Example
3 Comparative Example
4 Comparative Example
5 Comparative Example
6 Comparative Example
7 Comparative Example
8 Comparative Example
9 PA 48.0 48.0 48.0 38.0 56.0 51.0 20.0 17.0 87.0 ABS 47.0 47.0 47.0 47.0 32.0 32.0 47.0 47.0 3.0 PC 0 0 0 5.0 5.0 10.0 20.0 20.0 5 SMI 5 5 5 5.0 2.0 2.0 8.0 5.0 5 SEBS - - - 5.0 5.0 5.0 5.0 11.0 - Nucleophilic agent - One 4 - - - - - - The tensile strength 450 443 455 415 495 465 405 348 720 Tensile elongation 60 47 30 180 180 190 120 175 70 Flexural strength 680 670 690 600 700 685 578 505 950 curve
Elastic modulus 21,700 21,000 22,140 17,590 20,500 19,200 17,800 15,820 26,400 Impact strength 43 39 25 65 58 25 18 42 6 HDT 75 80 80 80 70 70 100 88 57

Examples 1 to 5 including the polyamide resin composition provided according to the composition of the present invention, as shown in Tables 1 and 2 above, were compared with Comparative Examples 1 to 9 which did not satisfy the composition of the present invention, It was confirmed that the heat distortion temperature was 82 ° C or higher in the high load of 18.6 kgf /

In addition, the polyamide resin composition according to the present invention had an effect that the thermal deformation temperature was 82 DEG C or higher without using a nucleophilic agent.

Claims (14)

(A) 10 to 70% by weight of a polyamide resin;
(B) 0.1 to 55% by weight of a vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer resin;
(C) 20 to 35% by weight of a polycarbonate resin;
(D) 0 to 5% by weight of a styrene-maleimide-based copolymer; And
(E) 0 to 10% by weight of maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer;
Wherein the polyamide resin composition is a polyamide resin composition.
The method according to claim 1,
The polyamide resin (A) may be at least one selected from the group consisting of polycaprolactam (nylon 6), polyhexamethylenediamine adipamide (nylon 6,6), polyhexamethylene sebacamide (nylon 6,10), polyhexamethylenediamine lauramide (Nylon 6,12), polytetramethylenediamine adipamide (nylon 4,6), and polylauroractam (nylon 12).
The method according to claim 1,
The (B) vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer is a rubber core polymerized by including a conjugated diene compound; And a shell surrounding the core, the shell polymerized with an aromatic vinyl compound and a vinyl cyan compound or an aromatic vinyl compound, a vinyl cyan compound, and an alkyl (meth) acrylate compound.
The method according to claim 1,
Wherein the polycarbonate resin (C) has a melt index of 3 to 30 g / 10 min.
The method according to claim 1,
Wherein the content of the polyamide resin (A) is less than or equal to the sum of the contents of (B) the vinyl cyan compound-conjugated diene compound-aromatic vinyl copolymer resin and (C) polycarbonate resin .
The method according to claim 1,
Wherein the weight ratio of the polyamide resin (A) to the polycarbonate resin (C) is 1: 0.1 to 5.
The method according to claim 1,
The styrene-maleimide copolymer (D) is at least one selected from the group consisting of styrene-N-phenyl maleimide-maleic anhydride copolymer, N-phenyl maleimide-maleic anhydride copolymer, and phenyl maleimide ≪ / RTI >
The method according to claim 1,
The polyamide resin composition may further contain at least one selected from the group consisting of a lubricant, an antioxidant, a light stabilizer, a chain extender, a catalyst, a release agent, a pigment, a dye, an antistatic agent, an antimicrobial agent, a processing aid, a metal deactivator, , An anti-wear agent, and a coupling agent.
The method according to claim 1,
Wherein the polyamide resin composition has a thermal deformation temperature of 82 DEG C or higher at a load of 18.6 kgf / cm < 2 > according to ASTM D648.
The method according to claim 1,
Wherein the polyamide resin composition has a tensile elongation of 140% or more according to ASTM D638.
The method according to claim 1,
Wherein the polyamide resin composition is a nucleophilic agent-free polyamide resin composition.
(A) 10 to 70% by weight of a polyamide resin; (B) 0.1 to 55% by weight of a vinyl cyan compound-conjugated diene compound-aromatic vinyl compound copolymer resin; And (C) 20 to 35% by weight of a polycarbonate resin; (D) 0 to 5% by weight of a styrene-maleimide-based copolymer; And (E) 0 to 10% by weight of maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer; and melt-kneading and extruding the maleic anhydride graft styrene-ethylene-butylene-styrene block copolymer.
A molded article produced by including the polyamide resin composition of any one of claims 1 to 11.
14. The method of claim 13,
Wherein the molded article is an automotive exterior part.
KR1020150159342A 2015-11-13 2015-11-13 Polyamide resin composition and molded products produced therefrom KR102023517B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101960535B1 (en) * 2018-04-25 2019-03-20 (주)우성케미칼 Polyamide master batch composition, polyamide resin composition having the same and product prepared therefrom
KR20190071154A (en) * 2017-12-14 2019-06-24 주식회사 엘지화학 Polycarbonate-polyamide alloy resin composition, and method for preparing the resin composition

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Publication number Priority date Publication date Assignee Title
KR19990061710A (en) * 1997-12-31 1999-07-26 폴 루르 Thermoplastic Composition
KR100252296B1 (en) 1997-11-28 2000-04-15 정몽규 Thermoplastic resin composition
KR100529206B1 (en) * 2000-04-12 2005-11-17 로디아 엔지니어링 플라스틱스 에스.에이. Thermoplastic polymeric compositions
KR100821066B1 (en) * 2005-11-11 2008-04-10 제일모직주식회사 Nylon/ABS/PMMA alloy having improved mechanical properties
JP2014051581A (en) * 2012-09-06 2014-03-20 Daicel Polymer Ltd Additive for thermoplastic resin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100252296B1 (en) 1997-11-28 2000-04-15 정몽규 Thermoplastic resin composition
KR19990061710A (en) * 1997-12-31 1999-07-26 폴 루르 Thermoplastic Composition
KR100529206B1 (en) * 2000-04-12 2005-11-17 로디아 엔지니어링 플라스틱스 에스.에이. Thermoplastic polymeric compositions
KR100821066B1 (en) * 2005-11-11 2008-04-10 제일모직주식회사 Nylon/ABS/PMMA alloy having improved mechanical properties
JP2014051581A (en) * 2012-09-06 2014-03-20 Daicel Polymer Ltd Additive for thermoplastic resin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190071154A (en) * 2017-12-14 2019-06-24 주식회사 엘지화학 Polycarbonate-polyamide alloy resin composition, and method for preparing the resin composition
KR101960535B1 (en) * 2018-04-25 2019-03-20 (주)우성케미칼 Polyamide master batch composition, polyamide resin composition having the same and product prepared therefrom

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