KR20200102738A - Polycarbonate resin composition and molded articles thereof - Google Patents

Abstract

The present invention relates to a polycarbonate resin composition and a molded product thereof and, more specifically, to a polycarbonate resin composition showing excellent tensile elongation and tensile strength, and to a product manufactured therefrom. The polycarbonate resin composition comprises: a polycarbonate resin; a polybutylene terephthalate resin; a mineral filler; and a methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber).

Description

Polycarbonate resin composition and a molded article comprising the same TECHNICAL FIELD [0002]

The present invention relates to a polycarbonate resin composition having excellent tensile elongation and tensile strength.

Polycarbonate resin is a resin prepared by condensation polymerization of an aromatic diol such as bisphenol A and a carbonate precursor such as phosgene, and has excellent mechanical and thermal properties. In particular, it has high impact resistance at room temperature and has excellent dimensional stability.

In recent years, it is difficult to meet physical properties such as moldability, notch sensitivity, and chemical resistance with only a single polycarbonate resin, and thus, materials obtained by blending several polymers have been developed. In particular, when blending a polycarbonate resin and a polybutylene terephthalate resin, defects in moldability, notch sensitivity and chemical resistance of the polycarbonate resin are compensated.

On the other hand, research is being conducted to realize excellent physical properties by reinforcing a mineral filler in a polycarbonate resin composition. However, when the mineral filler is added, the tensile elongation sharply decreases, which is disadvantageous in the fatigue resistance of the resin composition.

Accordingly, the present inventors synthesized a polycarbonate resin composition prepared by adding methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) having a specific range of particle diameter, and specifying the feed rate and extrusion rate of the extrusion process. Thus, it was confirmed that the tensile elongation and tensile strength can be improved to complete the present invention.

The present invention is to provide a polycarbonate resin composition excellent in tensile elongation and tensile strength.

In order to solve the above problems, the present invention includes a polycarbonate resin, a polybutylene terephthalate resin, a mineral filler and a methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber), and the methyl methacrylate-butadiene -Styrene-based copolymer (MBS rubber) provides a polycarbonate resin composition having a number average particle diameter of 150 to 250 nm and a tensile elongation of 50 to 105% measured according to ISO 527.

In addition, in the present invention, a polycarbonate resin, a polybutylene terephthalate resin, a mineral filler, and a methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) are mixed and prepared (step 1); And

Extruding the mixture prepared in step 1 with an extruder (step 2),

The methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) has a number average particle diameter of 150 to 250 nm,

In the step 2, the supply rate is 40 to 80 kg/hr, and the extrusion rate is 150 to 300 rpm,

It provides a method for producing a polycarbonate resin composition.

In addition, the present invention provides a molded article comprising the polycarbonate resin composition.

Hereinafter, the present invention will be described in detail for each component.

Polycarbonate resin

The polycarbonate resin is a base resin included in the polycarbonate resin composition, and more specifically, may be an aromatic polycarbonate prepared by polymerization of an aromatic diol-based compound and a carbonate precursor.

The aromatic diol-based compound for preparing the polycarbonate resin may be a bisphenol-based compound, specifically bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl) Sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)ketone, 1,1-bis(4-hydroxyphenyl)ethane, 2,2 -Bis(4-hydroxyphenyl)propane (bisphenol A; BPA), 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane (bisphenol Z; BPZ ), 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, 2,2-bis( 4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3-chlorophenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 2, 2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane or α, ω-bis[3-(ο-hydroxyphenyl)propyl]polydimethylsiloxane, and the like, and any one or a mixture of two or more of them may be used.

In addition, the carbonate precursors include dimethyl carbonate, diethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate, diphenyl carbonate, ditolyl carbonate, bis(chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis (Diphenyl) carbonate, carbonyl chloride (phosgene), triphosgene, diphosgene, carbonyl bromide, bishaloformate, and the like, and any one or a mixture of two or more of them may be used. Phosgene or phosgene can be used.

More specifically, the polycarbonate resin may include a repeating unit represented by the following Formula 1 formed by reacting a hydroxy group of an aromatic diol-based compound and a carbonate precursor:

[Formula 1]

In Formula 1,

R ₁ to R ₄ are each independently hydrogen, C _1-10 alkyl, C _1-10 alkoxy, or halogen,

Z is unsubstituted or substituted phenyl C _1-10 alkylene, or C _1-10 unsubstituted or substituted with a C _3-15 alkyl, cycloalkyl consisting of alkylene, O, S, SO, SO _2, and CO It is chosen from the group.

More specifically, in Formula 1, R ₁ to R ₄ are each independently hydrogen, methyl, chloro, or bromo, and Z is methylene, ethane-1,1-diyl, propane-2,2-diyl, butane- Straight or branched C _1-10 alkylene unsubstituted or substituted with phenyl, such as 2,2-diyl, 1-phenylethane-1,1-diyl, or diphenylmethylene, or O, S, SO , SO ₂ , or CO. More specifically, in Formula 1, Z may be cyclohexane-1,1-diyl, O, S, SO, SO ₂ , or CO.

For example, when bisphenol A and triphosgene are polymerized as a carbonate precursor, the polycarbonate may include a repeating unit represented by the following Formula 1-1:

[Formula 1-1]

In addition, the polycarbonate resin may have a flow index (MI) (265°C, 5kg) measured according to ISO 1133 of 1 to 30 g/10min, or 10 to 30 g/10min, and mechanical strength within this range It has an excellent effect.

The above-described polycarbonate resin may be directly synthesized according to a well-known synthesis method of a general aromatic polycarbonate, or commercially available aromatic polycarbonate may be obtained and used.

In addition, the polycarbonate resin is included in an amount of 15 to 75% by weight based on the total weight of the resin composition. Preferably, at least 20% by weight, at least 25% by weight, at least 30% by weight, or at least 35% by weight; 72% or less, 69% or less, 66% or less, or 63% or less.

When the content of the polycarbonate resin is less than 15% by weight, there is a problem that it is difficult to realize the properties of the alloy, such as improvement in stiffness and impact strength, and even when it exceeds 75% by weight, there is a similar problem.

Polybutylene terephthalate resin

The polybutylene terephthalate (PBT) refers to a polymer obtained by direct esterification or transesterification reaction between 1,4-butanediol monomer and terephthalic acid or dimethyl terephthalate monomer, and the polybutylene Terephthalate resin is a modified polyamide copolymerized with polytetramethylene glycol (PTMG), polyethylene glycol (PEG), polypropylene glycol (PPG), low molecular weight aliphatic polyester or aliphatic polyamide, or blended with an impact modifier to improve impact resistance. It can also be used in the form of a butylene terephthalate resin.

The polybutylene terephthalate resin is blended with a polycarbonate resin to impart moldability, notch sensitivity, and chemical resistance to the polycarbonate resin composition.

The polybutylene terephthalate resin is included in an amount of 15 to 75% by weight based on the total weight of the resin composition. Preferably, the content of the polybutylene terephthalate resin is 17.5% by weight or more, 20% by weight or more, 22.5% by weight or more, or 25% by weight or more; 70% or less, 65% or less, 60% or less, 55% or less, 50% or less, or 45% or less by weight.

When the content of the polybutylene terephthalate resin is less than 15% by weight, there is a problem in that it is difficult to realize the properties of the alloy, such as improvement in stiffness and impact strength, and when it exceeds 75% by weight, there is a similar problem.

Mineral filler

The mineral filler may include metal powder, glass fiber, carbon black, carbon fiber, clay, mica, talc, wollastonite or mica, and any one or a mixture of two or more of them may be used. I can. Among them, talc may be used as a mineral filler in consideration of excellent compatibility with constituents in the polycarbonate resin composition and improvement in mechanical properties.

The mineral filler is included in an amount of 1 to 50% by weight based on the total weight of the polycarbonate resin composition. Preferably, the content of the mineral filler is 3% by weight or more, 5% by weight or more, or 7% by weight or more; 40% by weight or less, 30% by weight or less, or 20% by weight or less.

When the content of the mineral filler is less than 1% by weight, there is a problem that the effect as a reinforcing agent for improving compatibility and mechanical properties is not exhibited, and when it exceeds 50% by weight, extrusion production is impossible.

Methyl methacrylate-butadiene-styrene-based copolymer

The methyl methacrylate-butadiene-styrene-based copolymer is a copolymer containing methyl methacrylate as a repeating unit, acts as an impact modifier, and stabilizes the reactivity between the polycarbonate resin and the polybutylene terephthalate resin. At the same time, it causes a phase transition to improve the physical properties of the polycarbonate resin composition.

The methyl methacrylate-butadiene-styrene-based copolymer may be in the form of a core-shell rubber. Examples of the method for preparing the methyl methacrylate-butadiene-styrene-based copolymer are also not particularly limited, and various known methods for forming a core-shell structure, such as emulsion polymerization, suspension polymerization, solution polymerization, etc. Can be used without limitation.

The methyl methacrylate-butadiene-styrene-based copolymer is included in an amount of 1 to 20% by weight based on the total weight of the resin composition. Preferably, the content of the methyl methacrylate-butadiene-styrene-based copolymer is 2% by weight or more or 3% by weight or more; 15% by weight or less or 10% by weight or less.

When the content of the methyl methacrylate-butadiene-styrene-based copolymer is less than 1% by weight, the effect of impact reinforcement is insignificant, and when it exceeds 20% by weight, there is a problem of lowering the flow index and rigidity.

The number average particle diameter of the methyl methacrylate-butadiene-styrene-based copolymer measured by SEM (Scanning Electric Microscope, SU5000, HITACHI) is 150 to 250 nm, more specifically 150 nm or more, or 170 nm or more, or 190 nm or more While, it may be 250 nm or less, or 230 nm or less, or 220 nm or less. If the number average particle diameter is less than 150 nm, it is difficult to form a core-shell form, and there is a problem that the impact reinforcing effect is deteriorated. If it exceeds 250 nm, the light reflectance is different, resulting in a color difference of the polycarbonate resin composition. there is a problem

Polycarbonate resin composition

The polycarbonate resin composition according to the present invention can be prepared by melt-kneading and extruding the above-described components.

The polycarbonate resin composition may have a flow index (MI) (265° C., 5 kg) measured according to ISO 1133 of 1 to 30 g/10min, or 10 to 30 g/10min, and excellent mechanical strength within this range. It works.

Preferably, the polycarbonate resin composition may contain no other polymer components other than the above-described polycarbonate resin, polybutylene terephthalate resin, and methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber).

The polycarbonate resin composition according to the present invention can maintain excellent tensile elongation and tensile strength while maintaining the mechanical strength of the polycarbonate resin.

Specifically, the polycarbonate resin composition may have a tensile elongation of 50 to 105% measured according to ISO 527. Preferably it is 51% or more, 52% or more, 53% or more, or 55% or more. In addition, the higher the tensile elongation, the better the fatigue resistance, so there is no upper limit, but for example, it may be 104% or less, 103% or less, or 102% or less.

The polycarbonate resin composition may have a tensile strength measured according to ISO 527 of 50 MPa or more. Preferably, it may be 51 MPa or more, or 52 MPa or more. In addition, the higher the tensile strength, the better the fatigue resistance, so there is no upper limit, but it may be 65 MPa or less, 64 MPa or less, or 63 MPa or less, for example.

In addition, the polycarbonate resin composition (a specimen having a thickness of 4 mm) may have a Charpy notch impact strength measured according to ISO 179-1eA of 8 to 15 kgfcm/cm. It is preferably 9 kgfcm/cm or more. In addition, since the higher the impact strength is, the higher the impact strength is, so there is no upper limit, but it may be 14 kgfcm/cm or less as an example.

The polycarbonate resin composition may be prepared through an extruder having a feed rate of 40 to 80 kg/hr, 43 to 77 kg/hr, or 46 to 74 kg/hr.

If the feed rate is less than 40 kg/hr, there is a problem of an increase in production cost due to a decrease in production, and if it exceeds 80 kg/hr, the pressure inside the extruder increases during production, making it difficult to produce.

The polycarbonate resin composition may be prepared through an extruder having an extrusion speed of 150 to 300 rpm, 160 to 290 rpm, 170 to 280 rpm, or 180 to 270 rpm.

If the extrusion speed is less than 150 rpm, the supply speed is excessively increased, making it difficult to produce due to an increase in the pressure inside the extruder. If it exceeds 300 rpm, the polycarbonate resin composition receives a lot of heat history and is decomposed, and the measurement properties There is a downside to this falling.

additive

The polycarbonate resin composition according to an embodiment of the present invention may further include one or more additives such as a heat stabilizer, a lubricant, a light stabilizer, an antioxidant, a release agent, a plasticizer, a dye, a pigment, and a colorant, if necessary. have.

The content of the additive may be appropriately adjusted with respect to the total weight of the total polycarbonate resin composition, and for example, may be included in 1 to 7% by weight to the total weight of the total resin composition.

The additives may be appropriately mixed while mixing components for forming the composition, and by including one or more additives in the polycarbonate resin composition, the polycarbonate resin composition and one or more additives included in the molded article manufactured therefrom Can give characteristics.

Method for producing polycarbonate resin composition

On the other hand, the polycarbonate resin composition is a polycarbonate resin; Polybutylene terephthalate resin; Mineral fillers; And preparing a mixture of methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) (Step 1); And extruding the mixture prepared in step 1 with an extruder (step 2), wherein the methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) has a number average particle diameter of 150 to 250 nm, and the In step 2, the supply rate is 40 to 80 kg/hr, and the extrusion rate is 150 to 300 rpm. It can be prepared through a method of preparing a polycarbonate resin composition.

In the manufacturing method of the polycarbonate resin composition, the'polycarbonate resin' is as described above for the polycarbonate resin;

The'polybutylene terephthalate resin' is as described above for the polybutylene terephthalate resin;

'Mineral filler' is as described above for mineral filler;

The'methyl methacrylate-butadiene-styrene-based copolymer' is as described above in the methyl methacrylate-butadiene-styrene-based copolymer;

The'polycarbonate resin composition' is as described above in the polycarbonate resin composition and additive.

The mixing in step 1 is not particularly limited, and various conventionally known mixing devices may be used without limitation. For example, it may be carried out using a conventional mixing device such as a super mixer, a ribbon blender, a Henschel mixer, and a V blender.

In addition, the mixing of step 1 may include melting and kneading, and the melting and kneading may include equipment commonly used in the art, such as a Banbury mixer, a drum tumbler, a single screw extruder, and a twin-screw extruder. , Connder, multi-screw extruder, etc. can be carried out using a melting/kneading device.

The melting and kneading temperature may be appropriately adjusted as necessary, and preferably may be adjusted to a temperature of 200 to 300°C.

The melting and mixing of the step 1 and the extrusion of the step 2 may be continuously performed in the same device, and various conventionally known extrusion devices may be used without limitation, such as a single screw extruder, a twin-screw extruder. , Connder, and multi-screw extruder. Preferably, a twin screw extruder can be used.

The extruder of step 2 may have the same feed rate and extrusion rate as previously described in the'polycarbonate resin composition'.

The composition extruded and pelletized in step 2 may be controlled and dried at an appropriate temperature and time as needed, preferably 50° C. or more and 150° C. or less, and 2 hours or more and 12 hours or less.

Molded article

On the other hand, the present invention provides a molded article comprising the polycarbonate resin composition.

The molded article is an article obtained by molding by extrusion, injection or casting using the above-described polycarbonate resin composition as a raw material. The molding method and conditions may be appropriately selected and adjusted according to the type of the molded article. For example, the molded article may be prepared by mixing and extrusion molding the polycarbonate-based resin composition into pellets, and then drying the pellets to inject.

The polycarbonate resin composition and a molded article thereof according to the present invention may exhibit excellent tensile elongation and tensile strength.

1 is a TEM of a polycarbonate resin composition prepared according to Example 1, and includes a polycarbonate resin (black part) and a polybutylene terephthalate resin (white part).
2 is a TEM of a polycarbonate resin composition prepared according to Example 2, comprising a polycarbonate resin (black portion) and a polybutylene terephthalate resin (white portion).
3 is a TEM of a polycarbonate resin composition prepared according to Example 3, and includes a polycarbonate resin (black part) and a polybutylene terephthalate resin (white part).
4 is a TEM of a polycarbonate resin composition prepared according to Example 4, comprising a polycarbonate resin (black part) and a polybutylene terephthalate resin (white part).
5 is a TEM of a polycarbonate resin composition prepared according to Comparative Example 1, and includes a polycarbonate resin (black part) and a polybutylene terephthalate resin (white part).
6 is a TEM of a polycarbonate resin composition prepared according to Comparative Example 2, and includes a polycarbonate resin (black portion) and a polybutylene terephthalate resin (white portion).
7 is a TEM of a polycarbonate resin composition prepared according to Example 5, including a polycarbonate resin (black portion) and a polybutylene terephthalate resin (white portion).
8 is a TEM of a polycarbonate resin composition prepared according to Example 6, and includes a polycarbonate resin (black part) and a polybutylene terephthalate resin (white part).

Hereinafter, it will be described in more detail to aid the understanding of the present invention. However, the following examples are merely illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

Example 1

After mixing according to the content of each component shown in Table 1, it was mixed with a super mixer, and kneaded/melted with a twin-screw extruder at 200 to 300°C to perform extrusion processing. During extrusion processing, processing conditions were performed according to the description in Table 1 below. After drying the pelletized composition at 120° C. for at least 4 hours, specimens were prepared according to each experimental condition at 200 to 300° C. using an Engel extruder (80 ton).

Examples 2 to 6

Specimens of Examples 2 to 6 were prepared in the same manner as in Example 1, except for mixing according to the content of each component according to Table 1 below, and preparing the specimen according to the processing conditions shown in Table 1.

Comparative Example 1 and Comparative Example 4

Samples of Comparative Example 1 and Comparative Example 4 were manufactured in the same manner as in Example 1, except that the contents of each component were mixed according to Table 1 below, and the specimen was prepared according to the processing conditions shown in Table 1.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 ingredient
(weight%) PC 1 ^*1 50 - - 50 50 50 50 50 50 50 PC 2 ^*2 - 50 50 - - - - - - - PBT ^*3 30 30 30 30 30 30 30 30 30 30 MBS 1 ^*4 - - - - - - 5 5 - - MBS 2 ^*5 5 5 5 5 5 5 - - 5 5 additive Heat stabilizer ^*6 5 3 5 3 5 3 5 3 5 3 5 3 5 3 5 3 5 3 5 3 Lubricant ^*7 2 2 2 2 2 2 2 2 2 2 Mineral filler
(Talc) ^*8 10 10 10 10 10 10 10 10 10 10 Process conditions ^*9 Feed rate
(kg/hr) 50 50 70 70 50 70 50 70 30 70 Extrusion speed
(rpm) 250 250 200 200 200 250 250 200 200 350

*1 PC 1: MI 3 polycarbonate resin (PC 1300-03, LG Chem)

*2 PC 2: MI 10 polycarbonate resin (PC 1300-10, LG Chem)

*3 PBT: TH6082 polybutylene terephthalate resin (Tunhe)

*4 MBS 1: 300 nm number average particle diameter (GA0306, GANZPEARL)

*5 MBS 2: 200 nm number average particle diameter (EM520, LG Chem)

*6 heat stabilizer: antioxidant (Irganox 1010, CIBA)

*7 lubricant: lubricant (polyethylene wax, LC102N, Lione Chemtec)

*8, Talc: KC3000C, Talc

* Equipment used in the process of 9: 40Ψ Twin screw extruder (SM Platek)

Experimental example

The physical properties of the specimens of the Examples and Comparative Examples were measured in the following manner, and the results are shown in Table 2 below.

(1) MI (Melt Index, flow index, g/10min): MI was measured at 265°C and 5kg according to ISO 1133.

(2) Tensile elongation (%): Tensile elongation was measured according to ISO 527.

(3) Tensile strength (MPa): Tensile strength was measured according to ISO 527.

(4) Impact strength (kgfcm/cm): A specimen having a thickness of 4 mm was prepared according to ISO 179-1eA, and the Charpy notch impact strength was measured.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 MI
(g/10min) 22 27 20 14 21 22 25 24 21 25 Tensile elongation
(%) 55 54 80 100 60 58 6 11 40 35 The tensile strength
(MPa) 55 53 57 60 56 57 53 55 54 53 Impact strength
(kgfcm/cm) 10 9 11 13 10 10 6 7 8 8 TEM photo Fig. 1 Figure 2 Figure 3 Fig. 4 Fig. 7 Fig. 8 Figure 5 Fig. 6 - -

Referring to Table 1, in the case of Examples 1 to 6 using MBS 2, the tensile elongation was 50% or more, which was more than 5 times superior to Comparative Examples 1 and 2. Tensile strength also showed the same level as the comparative example, or 8% or more excellent results.

In addition, looking at the TEM results of FIGS. 1 to 8, in the embodiment of the present invention using MBS 2 having a smaller number average particle diameter instead of MBS 1 (FIGS. 1 to 4, 7 and 8 ), polycarbonate resin and poly It was confirmed that the phase change of the butylene terephthalate resin occurred. Accordingly, it was found that the impact strength, tensile elongation and tensile strength were improved as shown in Table 2, and the tendency of the phase to change continuously appeared as the extrusion feed rate and screw speed were controlled.

Claims (15)

Polycarbonate resin;
Polybutylene terephthalate resin;
Mineral fillers; And
Including methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber),
The methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) has a number average particle diameter of 150 to 250 nm,
Tensile elongation measured according to ISO 527 is 50 to 105%,
Polycarbonate resin composition.
The method of claim 1,
Based on the total weight of the polycarbonate resin composition,
15 to 75% by weight of a polycarbonate resin;
15 to 75% by weight of polybutylene terephthalate resin;
1 to 50% by weight of mineral filler; And
Including 1 to 20% by weight of methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber),
Polycarbonate resin composition.
The method of claim 1,
The mineral filler is talc,
Polycarbonate resin composition.
The method of claim 1,
Further comprising any one or more additives selected from the group consisting of a heat stabilizer, a lubricant, a light stabilizer, an antioxidant, a release agent, a plasticizer and a colorant,
Polycarbonate resin composition.
The method of claim 4,
The additive is a lubricant and a heat stabilizer,
Polycarbonate resin composition.
The method of claim 4,
The additive contains 1 to 7% by weight, based on the total weight of the polycarbonate resin composition,
Polycarbonate resin composition.
The method of claim 1,
The tensile strength measured according to ISO 527 is 50 to 65 MPa,
Polycarbonate resin composition.
The method of claim 1,
According to ISO 179-1eA, Charpy notch impact strength is 8 to 15 kgfcm/cm,
Polycarbonate resin composition.
The method of claim 1,
The feed rate is 40 to 80 kg/hr, and the extrusion rate is prepared through an extruder with 150 to 300 rpm,
Polycarbonate resin composition.
The method of claim 1,
The polycarbonate resin, the polybutylene terephthalate resin, and the methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) in addition to other polymer components are not further included,
Polycarbonate resin composition.
Preparing by mixing a polycarbonate resin, a polybutylene terephthalate resin, a mineral filler, and a methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) (Step 1); And
Extruding the mixture prepared in step 1 with an extruder (step 2),
The methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber) has a number average particle diameter of 150 to 250 nm,
In the step 2, the supply rate is 40 to 80 kg/hr, and the extrusion rate is 150 to 300 rpm,
Method for producing a polycarbonate resin composition.
The method of claim 11,
Based on the total weight of the polycarbonate resin composition,
15 to 75% by weight of a polycarbonate resin;
15 to 75% by weight of polybutylene terephthalate resin;
1 to 50% by weight of mineral filler; And
Including 1 to 20% by weight of methyl methacrylate-butadiene-styrene-based copolymer (MBS rubber),
Method for producing a polycarbonate resin composition.
The method of claim 11,
Further comprising any one or more additives selected from the group consisting of a heat stabilizer, a lubricant, a light stabilizer, an antioxidant, a release agent, a plasticizer and a colorant,
Method for producing a polycarbonate resin composition.
The method of claim 11,
The tensile strength measured according to ISO 527 is 50 to 65 MPa,
Method for producing a polycarbonate resin composition.
A molded article comprising the polycarbonate resin composition of claim 1.

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