KR102253835B1 - Thermoplastic resin composition and article produced therefrom - Google Patents

Abstract

The thermoplastic resin composition of the present invention comprises a polycarbonate resin; Rubber-modified vinyl-based graft copolymer; glass fiber; And a phosphorus-based flame retardant; wherein the rubber-modified vinyl-based graft copolymer includes a rubbery polymer core having an average particle size of 100 to 170 nm, and a multilayer shell coated on the surface of the core, and the multilayer shell is an alkyl ( A first shell formed by graft polymerization of a meth)acrylate monomer on the surface of the core, and a monomer mixture including an alkyl (meth)acrylate monomer and an aromatic vinyl-based monomer are formed by graft polymerization on the surface of the first shell It is characterized by consisting of a second shell. The thermoplastic resin composition is excellent in impact resistance, flame retardancy, fluidity, and injection molding properties.

Description

Thermoplastic resin composition and molded article formed therefrom TECHNICAL FIELD [THERMOPLASTIC RESIN COMPOSITION AND ARTICLE PRODUCED THEREFROM}

The present invention relates to a thermoplastic resin composition and a molded article formed therefrom. More specifically, the present invention relates to a thermoplastic resin composition excellent in impact resistance, flame retardancy, fluidity, injection molding properties, and the like, and a molded article formed therefrom.

Polycarbonate resin is an engineering plastic with excellent impact resistance, heat resistance, dimensional stability, and transparency. Typically, a blend of a thermoplastic resin such as a polycarbonate resin and an inorganic filler is widely used for molding products requiring high rigidity, for example, interior/exterior materials for automobiles and electric/electronic products.

When an inorganic filler such as glass fiber is blended with such a polycarbonate resin, appearance characteristics such as a decrease in fluidity (moldability) and an inorganic filler protruding from the surface of a molded product may occur. In addition, when the resin composition is injected, distortion may occur due to an anisotropy problem of the inorganic filler. Accordingly, there have been attempts to apply talc or the like of a plate-like structure capable of improving the anisotropy problem as an inorganic filler.

However, when talc is used as the inorganic filler, there is a concern that mechanical properties such as impact resistance of the resin composition may be deteriorated due to the brittleness of the talc. In addition, the blend (resin composition) of a thermoplastic resin such as a polycarbonate resin and an inorganic filler may deteriorate fluidity, injection moldability, flame retardancy, and the like, depending on the type and shape of the inorganic filler to be applied.

Therefore, there is a need to develop a thermoplastic resin composition excellent in impact resistance, flame retardancy, fluidity, and injection molding properties.

The background technology of the present invention is disclosed in Korean Patent Application Publication No. 10-2011-0059886 and the like.

An object of the present invention is to provide a thermoplastic resin composition excellent in impact resistance, flame retardancy, fluidity, injection molding properties, and the like.

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

All of the above and other objects of the present invention can 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 is a polycarbonate resin; Rubber-modified vinyl-based graft copolymer; glass fiber; And a phosphorus-based flame retardant; wherein the rubber-modified vinyl-based graft copolymer includes a rubbery polymer core having an average particle size of 100 to 170 nm, and a multilayer shell coated on the surface of the core, and the multilayer shell is an alkyl ( A first shell formed by graft polymerization of a meth)acrylate monomer on the surface of the core, and a monomer mixture including an alkyl (meth)acrylate monomer and an aromatic vinyl-based monomer are formed by graft polymerization on the surface of the first shell It consists of a second shell.

2. In the first embodiment, the thermoplastic resin composition is 100 parts by weight of the polycarbonate resin; 0.2 to 6 parts by weight of the rubber-modified vinyl-based graft copolymer; 1 to 30 parts by weight of the glass fiber; And 0.5 to 10 parts by weight of the phosphorus-based flame retardant.

3. In the above 1 or 2 embodiment, the rubber-modified vinyl-based graft copolymer is 40 to 80% by weight of the core, 1 to 30% by weight of the first shell in 100% by weight of the total rubber-modified vinyl-based graft copolymer %, and 10 to 40% by weight of the second shell.

4. In the above 1 to 3 embodiments, the phosphorus-based flame retardant may include at least one of a phosphate compound, a phosphonate compound, a phosphinate compound, a phosphine oxide compound, and a phosphazene compound.

5. In the above 1 to 4 embodiments, the weight ratio of the rubber-modified vinyl-based graft copolymer and the glass fiber may be 1:1 to 1:30.

6. In the above 1-5 embodiments, the weight ratio of the rubber-modified vinyl-based graft copolymer and the phosphorus-based flame retardant may be 1:0.1 to 1:10.

7. In the above 1 to 6 embodiments, the thermoplastic resin composition may have a notched Izod impact strength of 8 to 20 kgf·cm/cm of a 1/8" thick specimen measured according to ASTM D256.

8. In the above 1 to 7 embodiments, the thermoplastic resin composition may have a flame retardancy of V-1 or more of a 1 mm thick specimen measured according to UL-94 standards.

9. In the above embodiments 1 to 8, the thermoplastic resin composition is a spiral having a thickness of 2 mm under conditions of a molding temperature of 260° C., a mold temperature of 60° C., an injection pressure of 1,500 kgf/cm ² and an injection speed of 120 mm/s. The length of a spiral flow of the specimen measured after injection molding in a mold having a shape may be 250 to 400 mm.

10. 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 the above 1 to 9.

The present invention has the effect of the present invention to provide a thermoplastic resin composition excellent in impact resistance, flame retardancy, fluidity, injection moldability, and the like, and a molded article formed therefrom.

Hereinafter, the present invention will be described in detail.

The thermoplastic resin composition according to the present invention includes (A) a polycarbonate resin; (B) rubber-modified vinyl-based graft copolymer; (C) glass fibers; And (F) a phosphorus-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 prepared by reacting diphenols (aromatic diol compounds) with a precursor such as phosgene, halogen formate, or carbonic acid diester can be used.

In a specific 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 are 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) ) Cyclohexane can be used, specifically, 2,2-bis(4-hydroxyphenyl)propane called bisphenol-A can be used.

In specific embodiments, the polycarbonate resin may be used having a branched chain, for example, with respect to the total diphenols used in polymerization, 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 phenol group having a higher or higher phenol.

In a specific embodiment, the polycarbonate resin may be used in the form of a homopolycarbonate 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 reaction in the presence of an ester precursor, such as a bifunctional carboxylic acid.

In a specific embodiment, the polycarbonate resin may have a weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) of 10,000 to 50,000 g/mol, for example, 15,000 to 40,000 g/mol. In the above range, the fluidity (processability) of the thermoplastic resin composition may be excellent.

In a specific example, the polycarbonate resin may have a melt-flow index (MI) of 5 to 110 g/10 minutes measured under a load condition of 300°C and 1.2 kg according to ISO 1133. In addition, the polycarbonate resin may be a mixture of two or more polycarbonate resins having different melt flow indexes.

(B) rubber-modified vinyl-based graft copolymer

The rubber-modified vinyl-based graft copolymer of the present invention is capable of preventing deterioration of the fluidity and injection molding properties of the thermoplastic resin composition, and improving impact resistance even when glass fibers and flame retardants are applied, and has an average particle size of 100 A core-shell structure comprising a rubbery polymer core of to 170 nm, and a multilayer shell coated on the core surface, wherein the multilayer shell is grafted with an alkyl (meth)acrylate monomer on the core surface. It is characterized in that it comprises a first shell formed by polymerization, and a second shell formed by graft polymerization of a monomer mixture including an alkyl (meth)acrylate monomer and an aromatic vinyl-based monomer on the surface of the first shell. The polymerization may be carried out by a known polymerization method such as emulsion polymerization and suspension polymerization.

In a specific embodiment, the rubber polymer includes a diene-based rubber such as polybutadiene, poly(styrene-butadiene), and poly(acrylonitrile-butadiene), and a saturated rubber hydrogenated to the diene-based rubber, isoprene rubber, and 2 to carbon atoms. 10 alkyl (meth)acrylate rubber, a copolymer of alkyl (meth)acrylate and styrene having 2 to 10 carbon atoms, ethylene-propylene-diene monomer terpolymer (EPDM), and the like can be exemplified. These may be applied alone or in combination of two or more. For example, diene rubber, (meth)acrylate rubber, and the like can be used, and specifically, butadiene rubber, butyl acrylate rubber, and the like can be used.

In a specific embodiment, the rubbery polymer (rubber particles, core) may have an average particle size of 100 to 170 nm, for example, 130 to 160 nm. When the average particle size of the rubbery polymer is less than 100 nm, there is a concern that the injection moldability and impact resistance of the thermoplastic resin composition may be deteriorated, and when it exceeds 170 nm, the appearance characteristics of the thermoplastic resin composition, flame retardancy, flowability, injection There is a fear that the moldability and the like may be deteriorated. Here, the average particle size (z-average) of the rubbery polymer can be measured using a light scattering method in a latex state. Specifically, the rubbery polymer latex is filtered through a mesh to remove coagulation generated during the rubbery polymer polymerization, and a solution of 0.5 g of latex and 30 ml of distilled water is poured into a 1,000 ml flask and filled with distilled water to prepare a sample. , 10 ml of a sample is transferred to a quartz cell, and the average particle size of the rubbery polymer can be measured with a light scattering particle size meter (malvern, nano-zs).

In a specific embodiment, the alkyl (meth)acrylate monomer can be graft-polymerized on the rubbery polymer, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth) An acrylate, a combination of these, etc. can be illustrated. For example, butyl acrylate or the like may be used for the first shell, and methyl methacrylate or the like may be used for the second shell.

In a specific embodiment, the aromatic vinyl-based monomer is one that can be polymerized with the alkyl (meth)acrylate monomer, styrene, α-methylstyrene, β-methylstyrene, p-methylstyrene, pt-butylstyrene, ethylstyrene, Vinylxylene, monochlorostyrene, dichlorostyrene, dibromostyrene, vinylnaphthalene, combinations thereof, and the like can be exemplified. For example, styrene or the like can be used.

In an embodiment, in 100% by weight of the monomer mixture of the second shell, the content of the alkyl (meth)acrylate monomer may be 10 to 90% by weight, for example, 65 to 75% by weight, and the aromatic vinyl-based monomer The content of may be 10 to 90% by weight, for example 25 to 35% by weight. Within the above range, the thermoplastic resin composition may have excellent impact resistance, appearance characteristics, and flame retardancy.

In a specific embodiment, the content of the rubbery polymer (core) may be 40 to 80% by weight, for example, 50 to 70% by weight of the total 100% by weight of the rubber-modified vinyl-based graft copolymer, and the content of the first shell Silver may be 1 to 30% by weight, for example, 5 to 25% by weight of the total 100% by weight of the rubber-modified vinyl-based graft copolymer, and the content of the second shell is 100% by weight of the entire rubber-modified vinyl-based graft copolymer In %, it may be 10 to 40% by weight, for example, 10 to 35% by weight. Within the above range, the thermoplastic resin composition may have excellent impact resistance and appearance properties.

In a specific embodiment, the rubber-modified vinyl-based graft copolymer may be included in an amount of 0.2 to 6 parts by weight, for example 0.5 to 5 parts by weight, specifically 1 to 4 parts by weight, based on 100 parts by weight of the polycarbonate resin. Within the above range, the thermoplastic resin composition may have excellent impact resistance, flame retardancy, fluidity, and injection molding properties.

(C) glass fiber

The glass fiber of the present invention is capable of improving mechanical properties such as stiffness of the thermoplastic resin composition, and glass fibers used in conventional thermoplastic resin compositions may be used.

In embodiments, the glass fibers may be in the form of fibers, and may have cross-sections of various shapes such as a circle, an oval, and a rectangle. For example, it may be desirable in terms of mechanical properties to use fibrous glass fibers of circular and/or rectangular cross-section.

In a specific embodiment, the circular cross-section of the glass fiber may have a cross-sectional diameter of 5 to 20 µm and a length before processing of 2 to 20 mm, and the rectangular cross-section of the glass fiber has an aspect ratio of the cross-section (long diameter of the cross-section / short diameter of the cross-section) Is 1.5 to 10, the short diameter may be 2 to 10 μm, and the length before processing may be 2 to 20 mm. Within the above range, the stiffness and processability of the thermoplastic resin composition may be improved.

In embodiments, the glass fibers may be treated with a conventional surface treatment agent.

In a specific embodiment, the glass fiber may be included in an amount of 1 to 30 parts by weight, for example, 5 to 15 parts by weight, based on 100 parts by weight of the polycarbonate resin. Within the above range, the thermoplastic resin composition may have excellent stiffness, fluidity, injection moldability, impact resistance, and flame retardancy.

In a specific embodiment, the weight ratio of the rubber-modified vinyl-based graft copolymer and the glass fiber may be 1: 1 to 1: 30, for example, 1: 2 to 1: 20. In the above range, the impact resistance, flame retardancy, fluidity, injection molding property, and balance of properties thereof of the thermoplastic resin composition may be more excellent.

(D) Phosphorus flame retardant

The phosphorus-based flame retardant according to an embodiment of the present invention may be a phosphorus-based flame retardant used in a conventional flame-retardant thermoplastic resin composition. For example, a phosphate compound, a phosphonate compound, a phosphinate compound, a phosphine oxide compound, a phosphazene compound, a metal salt thereof, a combination thereof, etc. Phosphorus-based flame retardants can be used.

In a specific embodiment, the phosphorus-based flame retardant may include an aromatic phosphoric acid ester compound represented by the following formula (1).

[Formula 1]

In Formula 1, R ₁ , R ₂ , R ₄ and R ₅ are each independently a hydrogen atom, a C6-C20 aryl group, or a C6-C20 aryl substituted with a C1-C10 alkyl group. Is a group, and R ₃ is a C6-C20 arylene group or a C6-C20 arylene group substituted with a C1-C10 alkyl group, for example, a dialcohol such as resorcinol, hydroquinone, bisphenol-A, and bisphenol-S. And n is an integer of 0 to 10, for example 0 to 4.

As the aromatic phosphoric acid ester compound represented by Formula 1, when n is 0, diaryl phosphate such as diphenyl phosphate, triphenyl phosphate, tricresyl phosphate, trizyrenyl phosphate, tri(2,6-dimethyl) Phenyl) phosphate, tri(2,4,6-trimethylphenyl) phosphate, tri(2,4-diteributylphenyl) phosphate, tri(2,6-dimethylphenyl) phosphate, etc. can be illustrated, and n is 1 In the case of, bisphenol-A diphosphate, bisphenol-A bis (diphenyl phosphate), resorcinol bis (diphenyl phosphate), resorcinol bis [bis (2,6-dimethylphenyl) phosphate], resorcinol bis [Bis(2,4-ditertiarybutylphenyl)phosphate], hydroquinone bis[bis(2,6-dimethylphenyl)phosphate], hydroquinone bis[bis(2,4-ditertiarybutylphenyl)phosphate], etc. It may be illustrated, and an oligomeric bisphenol-A diphosphate having n being 2 or more may be used, but is not limited thereto. These may be applied alone or in the form of a mixture of two or more.

In a specific embodiment, the phosphorus-based flame retardant may be included in an amount of 0.5 to 10 parts by weight, for example, 1 to 5 parts by weight, based on 100 parts by weight of the polycarbonate resin. Within the above range, the thermoplastic resin composition may have excellent flame retardancy, impact resistance, fluidity, and injection molding properties.

In a specific embodiment, the weight ratio of the rubber-modified vinyl-based graft copolymer and the phosphorus-based flame retardant may be 1: 0.1 to 1: 10, for example, 1: 0.5 to 1: 7. In the above range, the impact resistance, flame retardancy, fluidity, injection molding property, and balance of properties thereof of the thermoplastic resin composition may be more excellent.

The thermoplastic resin composition according to an embodiment of the present invention may further include an additive included in a conventional thermoplastic resin composition. Examples of the additives include, but are not limited to, anti-drip agents such as fluorinated olefin resins, antioxidants, lubricants, release agents, nucleating agents, stabilizers, pigments, dyes, and mixtures thereof. When using the additive, the 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 thermoplastic resin.

The thermoplastic resin composition according to an embodiment of the present invention may be in the form of pellets obtained by mixing the above constituents and melt-extruding at 200 to 300°C, for example 220 to 280°C, using a conventional twin screw extruder.

In a specific example, the thermoplastic resin composition has a notched Izod impact strength of a 1/8" thick specimen measured according to ASTM D256 of 8 to 20 kgf·cm/cm, for example, 10 to 15 kgf·cm/cm I can.

In a specific embodiment, the thermoplastic resin composition may have a flame retardancy of V-1 or more of a 1 mm thick specimen measured according to UL-94 standards.

In a specific example, the thermoplastic resin composition is injection-molded in a spiral-shaped mold having a thickness of 2 mm under conditions of a molding temperature of 260° C., a mold temperature of 60° C., an injection pressure of 1,500 kgf/cm ^{2 and an injection speed of 120 mm/s.} The length of the spiral flow of the specimen measured after may be 250 to 400 mm, for example, 250 to 350 mm.

The molded article according to the present invention is formed from the thermoplastic resin composition. The thermoplastic resin composition may be manufactured in the form of pellets, and the manufactured pellets may be manufactured into various molded products (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 field to which the present invention belongs. The molded product has excellent impact resistance, flame retardancy, fluidity, and balance of properties thereof, and can prevent burr generation during injection molding, and is useful as an interior/exterior material for electric/electronic products, interior/exterior materials for automobiles, etc. It is particularly useful as a material for large electric/electronic products.

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

(A) Polycarbonate resin

Bisphenol-A-based polycarbonate resin (weight average molecular weight (Mw): 27,000 g/mol) was used.

(B) rubber-modified vinyl-based graft copolymer

(B1) Graft polymerization of 8% by weight of butyl acrylate to 60% by weight of a butadiene rubber having an average particle size of 150 nm to form a first shell, and then methyl methacrylate and styrene (methyl methacrylate) on the surface of the first shell. Crylate/styrene (weight ratio): 71/29) A graft copolymer in a core-shell form in which a second shell was formed by graft polymerization of 32% by weight was used.

(B2) Graft polymerization of 8% by weight of butyl acrylate to 60% by weight of a butadiene rubber having an average particle size of 90 nm to form a first shell, and then methyl methacrylate and styrene (methyl methacrylate) on the surface of the first shell. Crylate/styrene (weight ratio): 71/29) A graft copolymer in a core-shell form in which a second shell was formed by graft polymerization of 32% by weight was used.

(B3) Graft polymerization of 8% by weight of butyl acrylate to 60% by weight of a butadiene rubber having an average particle size of 190 nm to form a first shell, and then methyl methacrylate and styrene (methyl methacrylate) on the surface of the first shell. Crylate/styrene (weight ratio): 71/29) 32% by weight of graft) was polymerized to form a second shell, and a graft copolymer in the form of a core-shell was used.

(B4) G-MBS in which 42% by weight of styrene and methyl methacrylate (weight ratio: 71/29) was grafted to 58°% by weight of butadiene rubber (average particle size: 310 nm) was used.

(C) glass fiber

Glass fiber (manufacturer: KCC, product name: CS321) was used.

(D) Phosphorus flame retardant

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

(E) inorganic filler

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

Example 1 to 3 and Comparative example 1 to 5

Each of the above constituents was added in an amount as shown in Table 1 below, and then extruded at 250° C. to prepare a pellet. Extrusion was performed using a twin-screw extruder with L/D=36 and diameter of 45 mm, and the produced pellets were dried at 80°C for more than 4 hours, and then injected from a 6 Oz injection machine (molding temperature 230°C, mold temperature: 60°C) to test specimens. Was prepared. The prepared specimens were evaluated for physical properties by the following method, and the results are shown in Table 1 below.

How to measure physical properties

(1) Notched Izod impact strength (unit: kgf·cm/cm): According to ASTM D256, the notched Izod impact strength of a 1/8" thick specimen was measured.

(2) Flame retardancy: In accordance with the UL-94 flammability testing standard, it was measured using a 1 mm thick specimen.

(3) Fluidity evaluation: specimen measured after injection molding in a spiral-shaped mold with a thickness of 2 mm under conditions of molding temperature 280°C, mold temperature 60°C, injection pressure 1,500 kgf/cm2, and injection speed 120 mm/s. The length of the spiral flow (unit: mm) was measured.

(4) Burr generation evaluation (injection moldability evaluation): In a rib mold with a thickness of 1.5 mm under the conditions of a molding temperature of 300°C, a mold temperature of 60°C, an injection pressure of 1,500 kgf/cm ^{2 and an injection speed of 130 mm/s.} After injection, the number of burrs generated in 27 empty spaces around the grill part was measured. Here, when the number of generated burrs is 15 or more, it was evaluated that the injection moldability deteriorated.

Example Comparative example One 2 3 One 2 3 4 5 (A) (parts by weight) 100 100 100 100 100 100 100 100 (B1) (parts by weight) 2 0.5 5 - - - 2 2 (B2) (parts by weight) - - - 2 - - - - (B3) (parts by weight) - - - - 2 - - - (B4) (parts by weight) - - - - 2 - - (C) (parts by weight) 10 10 10 10 10 10 - 10 (D) (parts by weight) 3 3 3 3 3 3 3 - (E) (parts by weight) - - - - - - 10 - Notch izod
Impact strength 12 10 15 10 10 13 6 10 Flame retardancy V-1 V-1 V-1 V-1 V-1 V-2 V-1 V-2 Spiral flow length 285 305 261 415 228 220 420 210 Burr occurrence evaluation 11 13 12 21 17 8 24 9

From the above results, it can be seen that the thermoplastic resin compositions (Examples 1 to 3) of the present invention are excellent in impact resistance, flame retardancy, fluidity, injection molding properties, and balance of physical properties thereof.

On the other hand, in the case of Comparative Example 1 in which the rubber-modified vinyl-based graft copolymer (B2) was applied instead of the rubber-modified vinyl-based graft copolymer (B1) of the present invention, it can be seen that the injection moldability and the like are deteriorated. In the case of Comparative Example 2 to which the modified vinyl-based graft copolymer (B3) was applied, it can be seen that the fluidity and injection molding properties were deteriorated, and in the case of Comparative Example 3 to which the rubber-modified vinyl-based graft copolymer (B4) was applied, It can be seen that flame retardancy and fluidity are deteriorated. In the case of Comparative Example 4 in which talc was used instead of the glass fiber, it can be seen that impact resistance and injection molding properties are deteriorated, and in the case of Comparative Example 5 in which a phosphorus-based flame retardant is not used, it can be seen that flame retardancy, fluidity, and the like are deteriorated.

Simple modifications or changes of the present invention can be easily implemented 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 (10)

100 parts by weight of polycarbonate resin;
0.2 to 6 parts by weight of a rubber-modified vinyl-based graft copolymer;
1 to 30 parts by weight of glass fibers; And
Including 0.5 to 10 parts by weight of a phosphorus-based flame retardant,
The rubber-modified vinyl-based graft copolymer includes a rubbery polymer core having an average particle size of 100 to 170 nm, and a multilayer shell coated on the surface of the core, and the multilayer shell includes an alkyl (meth)acrylate monomer. Characterized in that consisting of a first shell formed by graft polymerization on the surface, and a second shell formed by graft polymerization of a monomer mixture including an alkyl (meth)acrylate monomer and an aromatic vinyl monomer on the surface of the first shell The thermoplastic resin composition.
delete The method of claim 1, wherein the rubber-modified vinyl-based graft copolymer comprises 40 to 80% by weight of the core, 1 to 30% by weight of the first shell, and 100% by weight of the total rubber-modified vinyl-based graft copolymer. A thermoplastic resin composition comprising 10 to 40% by weight of the second shell.
The thermoplastic resin composition of claim 1, wherein the phosphorus-based flame retardant comprises at least one of a phosphate compound, a phosphonate compound, a phosphinate compound, a phosphine oxide compound, and a phosphazene compound.
The thermoplastic resin composition according to claim 1, wherein the weight ratio of the rubber-modified vinyl-based graft copolymer and the glass fiber is 1:1 to 1:30.
The thermoplastic resin composition according to claim 1, wherein the weight ratio of the rubber-modified vinyl-based graft copolymer and the phosphorus-based flame retardant is 1:0.1 to 1:10.
The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition has a notched Izod impact strength of 8 to 20 kgf·cm/cm measured according to ASTM D256.
The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition has a flame retardancy of V-1 or more of a 1 mm thick specimen measured according to UL-94 standards.
The method of claim 1, wherein the thermoplastic resin composition is formed in a spiral mold having a thickness of 2 mm under conditions of a molding temperature of 260°C, a mold temperature of 60°C, an injection pressure of 1,500 kgf/cm ^{2 and an injection speed of 120 mm/s.} A thermoplastic resin composition, characterized in that the length of a spiral flow of the specimen measured after injection molding is 250 to 400 mm.
A molded article formed from the thermoplastic resin composition according to any one of claims 1 to 9.