KR102347830B1 - Thermoplastic resin composition and article produced therefrom - Google Patents

Abstract

The thermoplastic resin composition of the present invention includes 100 parts by weight of a polycarbonate resin; 1 to 20 parts by weight of a polyester resin; 30 to 80 parts by weight of glass fiber; 5 to 33 parts by weight of mica; and 5 to 25 parts by weight of a phosphazene-based flame retardant, wherein the glass fiber has a cross-sectional diameter of 5 to 20 μm and a circular cross-section having a length of 1 to 15 mm before processing, and an aspect ratio of the cross-section ( The major axis/minor diameter of the cross-section) is 1.5 to 10, the minor diameter of the cross-section is 2 to 10 μm, and includes at least one of glass fibers having a rectangular cross-section having a length of 1 to 15 mm before processing, and the mica has an aspect ratio of the cross-section. (Major diameter of cross-section / minor diameter of cross-section) is 90 to 300, the average particle size (D50) is 200 to 550 μm, and the weight ratio of the glass fiber and the mica is 1.5: 1 to 7: 1. The thermoplastic resin composition has excellent dimensional stability, flame retardancy, impact resistance, and the like.

Description

Thermoplastic resin composition and molded article manufactured therefrom

The present invention relates to a thermoplastic resin composition and a molded article prepared therefrom. More specifically, the present invention relates to a thermoplastic resin composition having excellent dimensional stability, flame retardancy, impact resistance, and the like, and a molded article prepared therefrom.

As an engineering plastic, polycarbonate resin has excellent impact resistance, heat resistance, dimensional stability, weather resistance, flame retardancy, and electrical properties, and has the advantage of being transparent. useful. In addition, it has the characteristic of being able to strengthen various physical properties by applying various fillers.

However, fillers such as glass fiber, talc, and wollastonite, which are applied to improve the dimensional stability of polycarbonate resin, may have differences in physical properties depending on the type, and when more than a certain amount is added, rather decrease in physical properties. It is very difficult to implement a level of dimensional stability.

Therefore, there is a need to develop a thermoplastic resin composition that can implement metal-level dimensional stability and has excellent flame retardancy, impact resistance, and the like.

Background art of the present invention is disclosed in Korean Patent Publication No. 10-2011-0059886 and the like.

An object of the present invention is to provide a thermoplastic resin composition having excellent dimensional stability, flame retardancy, impact resistance, and the like.

Another object of the present invention is to provide a molded article formed from the thermoplastic resin composition.

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

1. One aspect of the present invention relates to a thermoplastic resin composition. The thermoplastic resin composition includes 100 parts by weight of a polycarbonate resin; 1 to 20 parts by weight of a polyester resin; 30 to 80 parts by weight of glass fiber; 5 to 33 parts by weight of mica; and 5 to 25 parts by weight of a phosphazene-based flame retardant, wherein the glass fiber has a cross-sectional diameter of 5 to 20 μm and a circular cross-section having a length of 1 to 15 mm before processing, and an aspect ratio of the cross-section ( The major axis/minor diameter of the cross-section) is 1.5 to 10, the minor diameter of the cross-section is 2 to 10 μm, and includes at least one of glass fibers having a rectangular cross-section having a length of 1 to 15 mm before processing, and the mica has an aspect ratio of the cross-section. (Major diameter of cross-section / minor diameter of cross-section) is 90 to 300, the average particle size (D50) is 200 to 550 μm, and the weight ratio of the glass fiber and the mica is 1.5: 1 to 7: 1.

2. In the first embodiment, the polyester resin may include one or more of polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, and polycyclohexylene terephthalate.

3. In the above embodiment 1 or 2, the polyester resin may include at least one of polyethylene terephthalate and polybutylene terephthalate.

4. In the above 1 to 3 embodiments, the weight ratio of the polyester resin and the glass fiber may be 1: 2 to 1: 40.

5. In the above 1 to 4 embodiments, the weight ratio of the polyester resin and the mica may be 1:1 to 1:15.

6. In the above 1 to 5 embodiments, the thermoplastic resin composition is an injection specimen having a size of 10 mm × 10 mm × 6.4 mm measured by raising the temperature from 0°C to 90°C at a rate of 5°C/min according to ASTM D696. The coefficient of linear expansion may be 20 to 45 μm/m·°C.

7. In embodiments 1 to 6, the thermoplastic resin composition may have a flame retardancy of V-0 of a 0.8 mm thick injection specimen measured by the UL-94 vertical test method.

8. In the above embodiments 1 to 7, the thermoplastic resin composition may have a notch Izod impact strength of 9 to 17 kgf·cm/cm of a specimen having a thickness of 1/8″ measured according to ASTM D256.

9. Another aspect of the present invention relates to a molded article. The molded article is characterized in that it is formed from the thermoplastic resin composition according to any one of 1 to 8.

10. In the 9th embodiment, the molded article may be an injection-molded article having a width of 100 to 300 cm, a length of 50 to 150 cm, and a thickness of 0.1 to 10 mm.

The present invention has the effect of providing a thermoplastic resin composition excellent in dimensional stability, flame retardancy, impact resistance, and the like, and a molded article formed therefrom.

Hereinafter, the present invention will be described in detail as follows.

The thermoplastic resin composition according to the present invention comprises (A) a polycarbonate resin; (B) polyester resin; (C) fiberglass; (D) mica; and (E) a phosphazene-based flame retardant.

In the present specification, "a to b" representing a numerical range is defined as "≥a and ≤b".

(A) polycarbonate resin

As the polycarbonate resin according to an embodiment of the present invention, a polycarbonate resin used in a conventional thermoplastic resin composition may be used. For example, an aromatic polycarbonate resin produced by reacting diphenols (aromatic diol compounds) with a precursor such as phosgene, halogen formate or diester carbonate can be used.

In an embodiment, the diphenols include 4,4'-biphenol, 2,2-bis(4-hydroxyphenyl)propane, 2,4-bis(4-hydroxyphenyl)-2-methylbutane, 1 ,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(3-chloro-4-hydroxyphenyl)propane, 2,2-bis(3,5-dichloro-4-hydroxyphenyl) Propane and the like may be exemplified, but the present invention is not limited thereto. For example, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(3,5-dichloro-4-hydroxyphenyl)propane, or 1,1-bis(4-hydroxyphenyl)propane ) cyclohexane, and specifically, 2,2-bis(4-hydroxyphenyl)propane called bisphenol-A may be used.

In an embodiment, the polycarbonate resin may be used with a branched chain, for example, based on the total amount of diphenols used for polymerization, from 0.05 to 2 mol% of a trivalent or higher polyfunctional compound, specifically, 3 It is also possible to use a branched polycarbonate resin prepared by adding a compound having a phenolic group or higher.

In an embodiment, the polycarbonate resin may be used in the form of a homo polycarbonate resin, a copolycarbonate resin, or a blend thereof. In addition, the polycarbonate resin may be partially or entirely replaced with an aromatic polyester-carbonate resin obtained by polymerization in the presence of an ester precursor, for example, a bifunctional carboxylic acid.

In an embodiment, the polycarbonate resin may have a weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) of 10,000 to 200,000 g/mol, for example, 15,000 to 80,000 g/mol. In the above range, the fluidity (processability) of the thermoplastic resin composition may be excellent.

(B) polyester resin

The polyester resin of the present invention is applied together with glass fiber, mica, etc., and can implement dimensional stability at the metal level without deterioration of physical properties such as impact resistance and flame retardancy. can For example, the polyester resin is a dicarboxylic acid component, terephthalic acid (TPA), isophthalic acid (IPA), 1,2-naphthalene dicarboxylic acid, 1,4-naphthalene dicarboxylic acid acid, 1,5-naphthalene dicarboxylic acid, 1,6-naphthalene dicarboxylic acid, 1,7-naphthalene dicarboxylic acid, 1,8-naphthalene dicarboxylic acid, 2,3-naphthalene dicarboxylic acid Aromatic dicarboxylic acids such as acid, 2,6-naphthalene dicarboxylic acid, 2,7-naphthalene dicarboxylic acid, dimethyl terephthalate (DMT), dimethyl isophthalate, dimethyl- 1,2-naphthalate, dimethyl-1,5-naphthalate, dimethyl-1,7-naphthalate, dimethyl-1,7-naphthalate, dimethyl-1,8-naphthalate, dimethyl-2,3-na Aromatic dicarboxylates such as phthalate, dimethyl-2,6-naphthalate, dimethyl-2,7-naphthalate, etc., as a diol component, ethylene glycol, 1,2-propylene glycol, 1,3-propylene Glycol, 2,2-dimethyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,5-pentanediol, 1,6-hexanediol, cyclic alkyl It can be obtained by polycondensing rendiol or the like.

In an embodiment, the polyester resin is one of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polytrimethylene terephthalate (PTT), and polycyclohexylene terephthalate. may include more than one. For example, the polyester resin may be polyethylene terephthalate, polybutylene terephthalate, a combination thereof, or the like.

In an embodiment, the polyester resin of the present invention is dissolved in o-chlorophenol solution (concentration: 0.5 g/dl) and has an intrinsic viscosity of 0.6 to 1.5 dl/g, measured using an Ubbelohde viscometer (capillary viscometer) at 25° C., For example, it may be 0.7 to 1.3 dl/g. Within the above range, the processability and dimensional stability of the thermoplastic resin composition may be excellent.

In an embodiment, the polyester resin may be included in an amount of 1 to 20 parts by weight, for example, 1.5 to 15 parts by weight, based on 100 parts by weight of the polycarbonate resin. When the content of the polyester resin is less than 1 part by weight with respect to 100 parts by weight of the polycarbonate resin, there is a risk that the dimensional stability of the thermoplastic resin composition may decrease, and if it exceeds 20 parts by weight, the flame retardancy of the thermoplastic resin composition, Impact resistance, etc. may fall.

(C) Glass fiber

The glass fiber of the present invention is applied together with the polyester resin, mica, and the like, and can implement dimensional stability at the metal level without deterioration of physical properties such as flame retardancy and impact resistance.

In embodiments, the glass fibers may be in the form of fibers and may have a circular (including oval) and/or rectangular cross-section.

In an embodiment, the glass fiber of the circular cross-section may have a cross-sectional diameter of 5 to 20 μm, for example, 10 to 20 μm, and a length before processing of 1 to 15 mm, for example, 2 to 8 mm, and the rectangular cross-section. of the glass fiber may have an aspect ratio of cross-section (major diameter of cross-section / minor diameter of cross-section) of 1.5 to 10, for example, 2 to 8, and a minor diameter of cross-section may be 2 to 10 μm, for example, 4 to 8 μm, , the length before processing may be 1 to 15 mm, for example 2 to 8 mm. When it is out of the above range, there is a risk that the dimensional stability, rigidity, processability, etc. of the thermoplastic resin composition may be deteriorated.

In an embodiment, the glass fiber may be treated with a conventional surface treatment agent.

In an embodiment, the glass fiber may be included in an amount of 30 to 80 parts by weight, for example, 40 to 80 parts by weight, based on 100 parts by weight of the polycarbonate resin. When the content of the glass fiber is less than 30 parts by weight based on 100 parts by weight of the polycarbonate resin, there is a risk that the dimensional stability of the thermoplastic resin composition may decrease, and when it exceeds 80 parts by weight, the impact resistance of the thermoplastic resin composition, There exists a possibility that a flame retardance etc. may fall.

In an embodiment, the weight ratio (B:C) of the polyester resin and the glass fiber may be 1: 2 to 1: 40, for example 1: 4 to 1: 40. In the above range, the dimensional stability, impact resistance, etc. of the thermoplastic resin composition may be more excellent.

(D) Mica

The mica of the present invention is applied together with the polyester resin, glass fiber, etc., and can implement dimensional stability at the metal level without deterioration of physical properties such as flame retardancy and impact resistance.

In an embodiment, the mica is a plate-shaped filler, and the aspect ratio of the cross-section (major diameter of cross-section / minor diameter of cross-section) may be 90 to 300, for example, 100 to 250, and a laser particle size analyzer (manufacturer: Beckman Coulter, equipment name: The average particle size (D50) measured by LS 13 320) may be 200 to 550 μm, for example, 250 to 450 μm. When it is out of the above range, there is a risk that the dimensional stability, rigidity, processability, etc. of the thermoplastic resin composition may be deteriorated.

In an embodiment, the mica may be included in an amount of 5 to 33 parts by weight, for example, 10 to 30 parts by weight, based on 100 parts by weight of the polycarbonate resin. When the content of the mica is less than 5 parts by weight based on 100 parts by weight of the polycarbonate resin, there is a fear that the dimensional stability of the thermoplastic resin composition may decrease, and when it exceeds 33 parts by weight, the impact resistance and flame retardancy of the thermoplastic resin composition There is a possibility that the etc. may be lowered.

In an embodiment, the weight ratio (B:D) of the polyester resin and the mica may be 1:1 to 1:15, for example, 1:1 to 1:14. In the above range, the dimensional stability, impact resistance, etc. of the thermoplastic resin composition may be more excellent.

In an embodiment, the weight ratio (C:D) of the glass fiber and the mica may be 1.5:1 to 7:1, for example, 2:1 to 6:1. When the weight ratio of the glass fiber and the mica is less than 1.5: 1, there is a risk that the dimensional stability of the thermoplastic resin composition may be lowered, and if it exceeds 7: 1, the dimensional stability, flame retardancy, impact resistance, etc. of the thermoplastic resin composition may be deteriorated. There is a risk of deterioration.

(E) phosphazene-based flame retardant

The phosphazene-based flame retardant according to an embodiment of the present invention can improve the flame retardancy of the thermoplastic resin composition, and a phosphazene compound used in a conventional flame-retardant thermoplastic resin composition can be used.

In an embodiment, the phosphazene-based flame retardant may include a phosphazene compound represented by Formula 1 below.

[Formula 1]

In Formula 1, R ₁ , R ₂ , R ₃ , R ₄ , R ₅ and R ₆ are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 to C 20 alkyl group, a substituted or unsubstituted An alkenyl group having 2 to 7 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted heterocycloalkyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms or an aryloxy group, a heteroaryl group having 5 to 20 carbon atoms, a substituted or unsubstituted alkoxycarbonylalkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted carbonylalkyl group having 2 to 10 carbon atoms, an amino group or a hydroxy group.

Here, the "substitution" refers to an alkyl group having 1 to 10 carbon atoms, a halogen atom, a nitro group, a cyano group, a hydroxy group, an amino group, an aryl group having 6 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, and a cycloalkyl group having 3 to 10 carbon atoms. It means being substituted with a substituent such as a heterocycloalkyl group, a heteroaryl group having 4 to 10 carbon atoms, or a combination thereof.

In addition, the above "alkyl", "alkoxy" and other substituents containing "alkyl" moieties include both straight-chain or branched forms, and "alkenyl" has 2 to 8 carbon atoms and contains one or more double bonds. includes both straight-chain or pulverized forms, and the term "cycloalkyl" includes both saturated monocyclic or saturated bicyclic ring structures having 3 to 20 carbon atoms. The "aryl" is an organic radical derived from an aromatic hydrocarbon by the removal of one hydrogen atom, and represents a single or fused ring system comprising suitably 4 to 7, preferably 5 or 6 ring atoms in each ring. include Specifically, phenyl, naphthyl, biphenyl, tolyl, and the like can be exemplified.

The "heterocycloalkyl" refers to a cycloalkyl group comprising 1 to 3 heteroatoms selected from N, O, S as saturated cyclic hydrocarbon backbone atoms, and the remaining saturated monocyclic or bicyclic ring backbone atoms are carbon. pyrrolidinyl, azetidinyl, pyrazolidinyl, oxazolidinyl, piperidinyl, piperazinyl, morpholinyl, thiomorpholinyl, thiazolidinyl, hydantoinyl, valerolactamyl, Oxiranyl, oxetanyl, dioxolanyl, dioxanyl, oxathiolanyl, oxathianyl, dithianyl, dihydrofuranyl, tetrahydrofuranyl, dihydropyranyl, tetrahydropyranyl, tetrahydropyri dinyl, tetrahydropyrimidinyl, tetrahydrothiophenyl, tetrahydrothiopyranyl, diazepanyl, azepanyl and the like can be exemplified.

The "heteroaryl" refers to an aryl group containing 1 to 3 heteroatoms selected from N, O, and S as an aromatic ring skeleton atom, and the remaining aromatic ring skeleton atoms are carbon, wherein the heteroaryl group is a heteroaryl group and divalent aryl groups in which atoms are oxidized or quaternized to form, for example, N-oxides or quaternary salts. Specifically, furyl, thienyl, pyrrolyl, pyranyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrazinyl, triazinyl and zolyl, tetrazolyl, furazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, and the like.

In an embodiment, the phosphazene-based flame retardant may be included in an amount of 5 to 25 parts by weight, for example, 7 to 25 parts by weight, based on 100 parts by weight of the polycarbonate resin. When the content of the phosphazene-based flame retardant is less than 5 parts by weight based on 100 parts by weight of the polycarbonate resin, there is a risk that the flame retardancy, fluidity, etc. of the thermoplastic resin composition may decrease, and when it exceeds 25 parts by weight, the thermoplastic resin composition Impact resistance, etc. may fall.

The thermoplastic resin composition according to an embodiment of the present invention may further include an additive included in a conventional thermoplastic resin composition. The additive may include, but is not limited to, an antioxidant, an anti-drip agent, a lubricant, a mold release agent, a nucleating agent, an antistatic agent, a stabilizer, a pigment, a dye, a mixture thereof, and the like. When the additive is used, its content may be 0.001 to 40 parts by weight, for example, 0.1 to 10 parts by weight, based on 100 parts by weight of the polycarbonate resin.

The thermoplastic resin composition according to an embodiment of the present invention may be in the form of pellets that are melt-extruded at 200 to 280°C, for example, 220 to 270°C, by mixing the above components and using a conventional twin-screw extruder.

In a specific example, according to ASTM D696, the coefficient of linear expansion of an injection specimen having a size of 10 mm × 10 mm × 6.4 mm measured by heating the temperature from 0°C to 90°C at a rate of 5°C/min with a thermo mechanical analyzer may be 20 to 45 μm/m·°C, for example, 30 to 40 μm/m·°C.

In an embodiment, the thermoplastic resin composition may have a flame retardancy of V-0 of a 0.8 mm thick injection specimen measured by the UL-94 vertical test method.

In an embodiment, the thermoplastic resin composition may have a notch Izod impact strength of 9 to 17 kgf cm/cm, for example, 10 to 16 kgf cm/cm, of a 1/8" thick specimen measured according to ASTM D256. have.

The molded article according to the present invention is formed from the thermoplastic resin composition. The antimicrobial thermoplastic resin composition may be prepared in the form of pellets, and the manufactured pellets may be manufactured into various molded articles (products) through various molding methods such as injection molding, extrusion molding, vacuum molding, and casting molding. Such a molding method is well known by those of ordinary skill in the art to which the present invention pertains. Since the molded article is excellent in dimensional stability, flame retardancy, impact resistance, and balance of physical properties thereof, it is useful as an interior/exterior material for electric and electronic products, a thin film sheet, and the like.

In a specific embodiment, the molded article has a coefficient of linear expansion of an injection specimen having a size of 10 mm × 10 mm × 6.4 mm measured by raising the temperature from 0°C to 90°C at a rate of 5°C/min according to ASTM D696 from 20 to 45 μm/ m °C, the flame retardancy of the 0.8 mm thick injection specimen measured by the UL-94 vertical test method is V-0, and the notch Izod impact strength of the 1/8" thick specimen measured according to ASTM D256 is 9 to 17 As kgf·cm/cm, it is suitable as a large injection molded article having a width of 100 to 300 cm, a length of 50 to 150 cm, and a thickness of 0.1 to 10 mm.

Hereinafter, the present invention will be described in more detail through examples, but these examples are for illustrative purposes only and should not be construed as limiting the present invention.

Example

Hereinafter, the specifications of each component used in Examples and Comparative Examples are as follows.

(A) polycarbonate resin

Bisphenol-A type polycarbonate resin having a weight average molecular weight (Mw) of 25,000 g/mol was used.

(B) polyester resin

(B1) Polyethylene terephthalate (PET, manufacturer: SK Chemical, product name: SKYPET 1100, intrinsic viscosity: 0.8 dl/g) was used.

(B2) Polybutylene terephthalate (PBT, manufacturer: Shinkong, product name: Shinite K006, intrinsic viscosity: 1.3 dl/g) was used.

(C) Glass fiber

(C1) Glass fiber (manufacturer: Nittobo, product name: FF45y11) having a cross-section aspect ratio (major diameter of cross-section / minor diameter of cross-section) of 4, a minor diameter of 7 μm, and a length of 3 mm before processing was used.

(C2) A glass fiber (manufacturer: Owens Corning, product name: CS 183F-4P) having a cross-section diameter of 13 μm and a length before processing of 4 mm was used.

(C3) Glass fiber (manufacturer: Sungjin Fiber, product name: MF75W-NL) having a cross-section diameter of 10 µm and a length of 50 µm before processing was used.

(D) inorganic fillers

(D1) Mica (manufacturer: IMERYS, product name: SUZORITE 60-S) having an aspect ratio of a cross-section (major diameter of cross-section / minor diameter of cross-section) of 100 and an average particle size (D50) of 280 μm was used.

(D2) Mica (manufacturer: IMERYS, product name: SUZORITE 200-HK) having an aspect ratio of a cross-section (major diameter of cross-section/minor diameter of cross-section) of 55 and an average particle size (D50) of 60 μm was used.

(D3) Mica (manufacturer: IMERYS, product name: SUZORITE 150-S) having a cross-section aspect ratio (longer diameter of cross-section / minor diameter of cross-section) of 90 and an average particle size (D50) of 150 μm was used.

(D4) Mica (manufacturer: IMERYS, product name: SUZORITE 30-S) having an aspect ratio of a cross-section (major diameter of a cross-section/minor diameter of a cross-section) of 100 and an average particle size (D50) of 600 μm was used.

(D5) Talc (manufacturer: KOCH, product name: KCP-04) was used.

(E) Phosphorus-Based Flame Retardant

(E1) A phosphazene compound (manufacturer: Fushimi Pharmaceutical, product name: FP-110) was used.

(E2) Bisphenol-A diphosphate (manufacturer: Yoke Chemical, product name: YOKE BDP) was used.

Examples 1 to 11 and Comparative Examples 1 to 16

After adding each of the components in the amounts as shown in Tables 1, 2, 3 and 4 below, extrusion was performed at 260° C. to prepare pellets. For extrusion, a twin screw extruder with L/D = 36 and a diameter of 45 mm was used, and the prepared pellets were dried at 80 ° C. for 4 hours or more, and then injected in a 6 Oz injection machine (molding temperature 260 ° C, mold temperature: 60 ° C). was prepared. The physical properties of the prepared specimens were evaluated by the following method, and the results are shown in Tables 1, 2, 3 and 4 below.

How to measure physical properties

(1) Dimensional stability evaluation: According to ASTM D696, the temperature was raised from 0°C to 90°C at a rate of 5°C/min using a thermo mechanical analyzer, and the linear expansion of an injection specimen having a size of 10 mm × 10 mm × 6.4 mm The coefficient (unit: μm/m·°C) was measured.

(2) Flame retardant evaluation: The flame retardancy of 0.8 mm thick injection specimen was measured by the UL-94 vertical test method.

(3) Impact resistance evaluation: According to ASTM D256, the notched Izod impact strength (unit: kgf·cm/cm) of a 1/8″ thick specimen was measured.

Example One 2 3 4 5 6 (A) (parts by weight) 100 100 100 100 100 100 (B1) (parts by weight) 1.5 4 15 4 4 (B2) (parts by weight) - - - 4 - - (C1) (parts by weight) 60 60 60 60 40 80 (C2) (parts by weight) - - - - - - (C3) (parts by weight) - - - - - - (D1) (parts by weight) 20 20 20 20 20 20 (D2) (parts by weight) - - - - - - (D3) (parts by weight) - - - - - - (D4) (parts by weight) - - - - - - (D5) (parts by weight) - - - - - - (E1) (parts by weight) 15 15 15 15 15 15 (E2) (parts by weight) - - - - - - coefficient of linear expansion 36.3 35.2 32.7 33.7 39.7 29.1 Flame retardancy V-0 V-0 V-0 V-0 V-0 V-0 Notched Izod Impact Strength 13.1 12.3 11.0 11.2 15.8 10.2

Example 7 8 9 10 11 (A) (parts by weight) 100 100 100 100 100 (B1) (parts by weight) 4 4 4 4 4 (B2) (parts by weight) - - - - - (C1) (parts by weight) 60 60 60 60 - (C2) (parts by weight) - - - - 60 (C3) (parts by weight) - - - - (D1) (parts by weight) 10 30 20 20 20 (D2) (parts by weight) - - - - - (D3) (parts by weight) - - - - - (D4) (parts by weight) - - - - - (D5) (parts by weight) - - - - - (E1) (parts by weight) 15 15 7 25 15 (E2) (parts by weight) - - - coefficient of linear expansion 37.5 32.0 35.1 36.2 38.4 Flame retardancy V-0 V-0 V-0 V-0 V-0 Notched Izod Impact Strength 13.4 10.5 15.8 10.5 11.5

comparative example One 2 3 4 5 6 7 8 (A) (parts by weight) 100 100 100 100 100 100 100 100 (B1) (parts by weight) 0.8 21 4 4 4 4 4 4 (B2) (parts by weight) - - - - - - - - (C1) (parts by weight) 60 60 25 85 - 60 60 60 (C2) (parts by weight) - - - - - - - - (C3) (parts by weight) - - - - 60 - - - (D1) (parts by weight) 20 20 20 20 20 3 35 - (D2) (parts by weight) - - - - - - - 20 (D3) (parts by weight) - - - - - - - - (D4) (parts by weight) - - - - - - - - (D5) (parts by weight) - - - - - - - - (E1) (parts by weight) 15 15 15 15 15 15 15 15 (E2) (parts by weight) - - - - - - - - coefficient of linear expansion 46.9 31.9 64.3 24.5 34.6 52.2 30.3 46.6 Flame retardancy V-0 V-1 V-0 V-2 V-1 V-0 V-1 V-1 Notched Izod Impact Strength 13.9 7.7 16.9 6.6 6.3 14.3 6.3 7.6

comparative example 9 10 11 12 13 14 15 16 (A) (parts by weight) 100 100 100 100 100 100 100 100 (B1) (parts by weight) 4 4 4 4 4 4 4 4 (B2) (parts by weight) - - - - - - - - (C1) (parts by weight) 60 60 60 60 60 60 30 80 (C2) (parts by weight) - - - - - - - - (C3) (parts by weight) - - - - - - - - (D1) (parts by weight) - - - 20 20 20 25 10 (D2) (parts by weight) - - - - - - - - (D3) (parts by weight) 20 - - - - - - - (D4) (parts by weight) - 20 - - - - - (D5) (parts by weight) - - 20 - - - - - (E1) (parts by weight) 15 15 15 4 28 - 15 15 (E2) (parts by weight) - - - - - 15 - - coefficient of linear expansion 47.3 48.1 48.3 32.8 40.2 34.5 54.1 47.7 Flame retardancy V-0 V-1 V-1 V-1 V-0 V-1 V-0 V-1 Notched Izod Impact Strength 8.1 5.5 6.3 15.3 8.1 8.3 14.8 7.2

From the above results, it can be seen that the thermoplastic resin composition of the present invention has excellent dimensional stability, flame retardancy, impact resistance, and the like.

On the other hand, when the polyester resin is applied below the content range of the present invention (Comparative Example 1), it can be seen that the dimensional stability of the thermoplastic resin composition is lowered, and the polyester resin is applied in excess of the content range of the present invention. In the case (Comparative Example 2), it can be seen that the flame retardancy, impact resistance, etc. of the thermoplastic resin composition are lowered, and when the glass fiber is applied below the content range of the present invention (Comparative Example 3), the dimensional stability of the thermoplastic resin composition, etc. It can be seen that the lowering, when the glass fiber is applied in excess of the content range of the present invention (Comparative Example 4), it can be seen that the flame retardancy, impact resistance, etc. of the thermoplastic resin composition is reduced. When glass fiber (C3) is applied instead of the glass fiber of the present invention (Comparative Example 5), it can be seen that the flame retardancy, impact resistance, etc. of the thermoplastic resin composition are lowered, and the mica is applied below the content range of the present invention. In the case (Comparative Example 6), it can be seen that the dimensional stability of the thermoplastic resin composition is lowered, and when mica is applied in excess of the content range of the present invention (Comparative Example 7), the flame retardancy, impact resistance, etc. of the thermoplastic resin composition decrease can be seen. When mica (D2) is applied instead of the mica of the present invention (Comparative Example 8), it can be seen that the dimensional stability, flame retardancy, impact resistance, etc. of the thermoplastic resin composition are reduced, and when mica (D3) is applied (comparative Example 9), it can be seen that the dimensional stability, impact resistance, etc. of the thermoplastic resin composition are reduced, and when mica (D4) is applied (Comparative Example 10), the dimensional stability, flame retardancy, impact resistance, etc. of the thermoplastic resin composition are reduced It can be seen that, when talc (D5) is applied (Comparative Example 11), it can be seen that the dimensional stability, flame retardancy, impact resistance, etc. of the thermoplastic resin composition are reduced. In addition, when the phosphazene-based flame retardant is applied below the content range of the present invention (Comparative Example 12), it can be seen that the flame retardancy of the thermoplastic resin composition is lowered, and the phosphazene-based flame retardant is applied in excess of the content range of the present invention (Comparative Example 13), it can be seen that the impact resistance of the thermoplastic resin composition is lowered, and when BSP (E2) is applied instead of the phosphazene-based flame retardant of the present invention (Comparative Example 14), the thermoplastic resin composition It can be seen that flame retardancy, impact resistance, and the like are lowered. In addition, even if the content of glass fiber and mica is included in the scope of the present invention, when the weight ratio is less than the scope of the present invention (1.2:1) (Comparative Example 15), it can be seen that the dimensional stability of the thermoplastic resin composition is lowered, , when the weight ratio exceeds the range of the present invention (8:1) (Comparative Example 16), it can be seen that the dimensional stability, flame retardancy, impact resistance, etc. of the thermoplastic resin composition are reduced.

Simple modifications or changes of the present invention can be easily carried out by those of ordinary skill in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

Claims (8)

100 parts by weight of polycarbonate resin;
1 to 20 parts by weight of a polyester resin;
30 to 80 parts by weight of glass fiber;
5 to 33 parts by weight of mica; and
5 to 25 parts by weight of a phosphazene-based flame retardant;
The glass fiber has a cross-sectional diameter of 5 to 20 μm, a glass fiber of a circular cross-section having a length of 1 to 15 mm before processing, and an aspect ratio of a cross-section (major diameter of a cross-section/minor diameter of a cross-section) of 1.5 to 10, and a minor diameter of the cross-section It is 2 to 10 μm and contains at least one of glass fibers having a rectangular cross-section having a length of 1 to 15 mm before processing,
The mica has an aspect ratio of a cross-section (a major diameter of a cross-section / a minor diameter of a cross-section) of 90 to 300, and an average particle size (D50) of 200 to 550 μm,
The weight ratio of the glass fiber and the mica is 1.5: 1 to 7: 1, characterized in that the thermoplastic resin composition.
The thermoplastic resin according to claim 1, wherein the polyester resin comprises at least one of polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, and polycyclohexylene terephthalate. composition.
The thermoplastic resin composition of claim 1, wherein the polyester resin comprises at least one of polyethylene terephthalate and polybutylene terephthalate.
The thermoplastic resin composition according to claim 1, wherein a weight ratio of the polyester resin and the glass fiber is 1:2 to 1:40.
The thermoplastic resin composition according to claim 1, wherein the weight ratio of the polyester resin and the mica is 1:1 to 1:15.
The coefficient of linear expansion of an injection specimen having a size of 10 mm × 10 mm × 6.4 mm measured by heating the thermoplastic resin composition at a rate of 5°C/min from 0°C to 90°C according to ASTM D696 is 20 to 45 μm/m·℃, the flame retardancy of the 0.8 mm thick injection specimen measured by the UL-94 vertical test method is V-0, and the notched Izod impact strength of the 1/8” thick specimen measured according to ASTM D256 A thermoplastic resin composition, characterized in that 9 to 17 kgf · cm / cm.
A molded article, characterized in that it is formed from the thermoplastic resin composition according to any one of claims 1 to 6.
The molded article according to claim 7, wherein the molded article is an injection-molded article having a width of 100 to 300 cm, a length of 50 to 150 cm, and a thickness of 0.1 to 10 mm.