KR101447276B1 - High impact strength flameproof scratch-resistant resin composition having good appearance and articles thereof - Google Patents

Abstract

The scratch resistant resin composition of the present invention comprises a continuous phase; Dispersed phase; And an impact modifier (D) formed on the surface of the dispersed phase, wherein the continuous phase comprises (A) a polycarbonate resin, (B) a modified (meth) acrylate resin and (E) a flame retardant, (C) an aromatic vinyl resin; The modified (meth) acrylate resin (B) is 10 to 20% by weight of (A) + (B) + (C) + (D). The high-impact flame-retardant scratch resin composition has excellent balance of appearance characteristics, impact strength, fluidity, heat resistance, scratch resistance and flame retardancy.

Description

TECHNICAL FIELD [0001] The present invention relates to a high-impact flame-retardant scratch-resistant resin composition having excellent appearance characteristics,

TECHNICAL FIELD The present invention relates to a high-impact flame-retardant scratch-resistant resin composition excellent in appearance and a molded article thereof. More specifically, the present invention relates to a high impact impact-resistant scratch-resistant resin composition and a molded article thereof that are improved in flame retardance, impact resistance, scratch resistance, fluidity and appearance properties by allowing a resin composition to have a specific morphology.

The PC / ABS Alloy resin of the polycarbonate resin (PC) / acrylonitrile-butadiene-styrene copolymer resin (ABS) can use the heat resistance and impact strength of the polycarbonate resin and the processability and chemical resistance of ABS And has excellent processing characteristics and mechanical properties. In addition, it exhibits excellent physical properties compared to ABS and can be used for various purposes because it can reduce cost compared to PC. For example, it is widely used in a variety of electronic products and automobile parts such as monitor housings, hard disks, printers, notebook batteries, door handles, bumpers, instrument panels and the like.

In addition to polycarbonate resin and ABS resin, a flame retardant and an impact modifier are usually used for such PC / ABS resin. However, since the affinity between the polycarbonate resin and the ABS is weak, and the ABS is aggregated and aggregated, the dispersing efficiency on the polycarbonate resin matrix is low, and it is difficult to obtain the desired impact strength with respect to the ABS content. Due to its limitations, it is not meeting the market demand for high appearance. Further, there is a problem that the appearance is deteriorated due to the flame retardant.

Korean Patent No. 10-0822740 Korean Patent Publication No. 10-2010-0043788

An object of the present invention is to provide a flame retardant scratch-resistant resin composition having a specific morphology and excellent compatibility.

Another object of the present invention is to provide a flame retardant scratch resin composition capable of exhibiting excellent physical properties such as flame retardancy, heat resistance, scratch resistance, flowability, impact strength and appearance.

One aspect of the present invention relates to a flame-retardant scratch-resistant resin composition. The composition comprises a continuous phase; Dispersed phase; And an impact modifier (D) formed on the surface of the dispersed phase; Wherein the continuous phase comprises (A) a polycarbonate resin, (B) a modified (meth) acrylate resin and (E) a flame retardant, wherein the dispersed phase comprises (C) an aromatic vinyl resin; The modified (meth) acrylate resin (B) is 10 to 20% by weight of (A) + (B) + (C) + (D).

In an embodiment, the difference between the average refractive index Rc of the continuous phase and the average refractive index Rr of the flame retardant may be 0.03 or less.

In another embodiment, the difference between the average refractive index Rc of the continuous phase and the average refractive index Rd of the dispersed phase may be 0.03 or less.

The impact modifier may have a core-shell structure.

In one embodiment, the shell component may comprise an acrylic copolymer.

In embodiments, the dispersed phase may not comprise a rubber component.

The modified (meth) acrylate resin may include a polymer of an aromatic or alicyclic (meth) acrylate.

The polycarbonate resin may be a combination of two or more polycarbonates having different flow indexes.

The impact modifier (D) may include 5 to 10% by weight of (A) + (B) + (C) + (D)

Another aspect of the present invention relates to a molded article molded from the resin composition. In the specific example, the molded article has an Izod impact strength of 10 to 50 kgf · cm / cm at a thickness of 1/8 "according to ASTM D-256, a flame resistance of V-0 at a thickness of 2 mm of UL 94 V, type scratch profile test may have a scratch width of 250 to 280 mu m.

INDUSTRIAL APPLICABILITY The resin composition of the present invention is excellent in compatibility with a specific morphology and has an effect of exhibiting excellent physical properties such as flame retardancy, heat resistance, scratch resistance, flowability, impact strength and appearance.

FIG. 1 is a schematic view schematically showing the morphology of a combination of conventional continuous phase, dispersed phase and impact modifier.
FIG. 2 is a schematic view schematically showing the morphology of the resin composition according to one embodiment of the present invention. FIG.

The structure of the present invention will be clarified with reference to the accompanying drawings. In the drawings, the size of elements constituting the invention is exaggerated for clarity of description, and is not limited thereto.

In the present invention, the 'continuous phase' corresponds to a resin matrice (MATRIX) and is a continuously formed phase without phase separation. The 'dispersed phase' is an image having a discontinuous island structure separated by a continuous phase.

1 is a schematic view schematically showing a morphology of a conventional continuous phase, dispersed phase and impact modifier combination. The continuous phase 10 is a resin containing polycarbonate, and the dispersed phase 20 is an aromatic vinyl resin. As shown in the figure, the impact modifier 30 containing a rubber component is formed inside the dispersed phase. As a result, the impact modifier 30 is agglomerated in the dispersed phase 20, which causes deterioration of physical properties such as transparency, appearance and impact strength.

Therefore, in the present invention, a morphology different from the conventional one is designed to achieve balance of physical properties of appearance and impact strength.

2 is a schematic view schematically showing the morphology of the resin composition according to one embodiment of the present invention.

As shown in the figure, a dispersed phase 20 is dispersed and formed in the continuous phase 10, and an impact modifier 30 is formed on the surface of the dispersed phase, that is, the interface between the continuous phase and the dispersed phase. By having such a morphology, it is possible to have transparency, coloring property, and physical property balance of appearance and impact strength.

The continuous phase comprises (A) a polycarbonate resin, (B) a modified (meth) acrylate resin and (E) a flame retardant, and the dispersed phase comprises (C) an aromatic vinyl resin. All or part of the surface of the dispersed phase is surrounded by the impact modifier (D).

In embodiments, the dispersed phase may not comprise a rubber component. That is, in the present invention, it is possible to prevent agglomeration by dispersing the rubber component or the graft copolymer particles, which are unlikely to be agglomerated, on the surface of the dispersed phase without forming it in the dispersed phase, It can be implemented.

In an embodiment, the difference between the average refractive index Rc of the continuous phase and the average refractive index Rr of the flame retardant may be 0.03 or less, preferably 0.02 or less. And has excellent transparency and appearance in the above range.

In another embodiment, the difference between the average refractive index Rc of the continuous phase and the average refractive index Rd of the dispersed phase may be 0.03 or less, preferably 0.02 or less. And has excellent transparency and appearance in the above range.

Hereinafter, the configuration of the present invention will be described in more detail.

(A) Polycarbonate resin

The polycarbonate resin (A) can be produced by reacting a diphenol represented by the following formula (1) with phosgene, a halogen acid ester, a carbonic ester, or a combination thereof.

[Chemical Formula 1]

Wherein A is a single bond, a substituted or unsubstituted C1 to C30 linear or branched alkylene group, a substituted or unsubstituted C2 to C5 alkenylene group, a substituted or unsubstituted C2 to C5 alkylene group A substituted or unsubstituted C1 to C30 linear or branched haloalkylene group, a substituted or unsubstituted C5 to C6 cycloalkylene group, a substituted or unsubstituted C5 to C6 cycloalkenylene group, a substituted or unsubstituted C5 to C10 cycloalkylidene groups, substituted or unsubstituted C6 to C30 arylene groups, substituted or unsubstituted C1 to C20 linear or branched alkoxysylene groups, halogen acid ester groups, carbonate ester groups, CO, S or SO ₂ , R ₁ and R ₂ are the same or different and each is a substituted or unsubstituted C1 to C30 alkyl group or a substituted or unsubstituted C6 to C30 aryl group, n ₁ and n ₂ each represent an integer of 0 to 4 It is an integer.)

The diphenols represented by the above formula (1) may be composed of two or more of them to form a repeating unit of a polycarbonate resin. Specific examples of the diphenols include 4,4'-dihydroxydiphenyl, 2,2-bis- (4-hydroxyphenyl) -propane, 2,4-bis- (3-chloro-4-hydroxyphenyl) -propane, 2,2-bis- (3,3-dihydroxyphenyl) 5-dichloro-4-hydroxyphenyl) -propane, and the like, but are not limited thereto. Of these, 2,2-bis- (4-hydroxyphenyl) -propane, 2,2-bis- (3,5-dichloro- Hydroxyphenyl) -cyclohexane, and the like, and 2,2-bis- (4-hydroxyphenyl) -propane, also referred to as bisphenol-A, is most preferred.

In addition, compounds such as resorcinol and hydroquinone may be used as the above diphenol compounds.

The weight average molecular weight of the polycarbonate resin (A) is 5,000 to 200,000 g / mol, preferably 15,000 to 100,000 g / mol, and more preferably 20,000 to 80,000 g / mol.

The polycarbonate resin (A) may be a homopolymer using one dihydric phenolic compound or a copolymer using two or more dihydric phenolic compounds or a mixture thereof.

The polycarbonate resin (A) may have the form of a linear polycarbonate resin, a branched polycarbonate resin, a copolymer thereof, a mixture thereof, or a polyester carbonate copolymer resin.

In an embodiment, the polycarbonate resin (A) may be used in a range of 5 to 180 g / 10 min when the flow index is measured at 300 DEG C and 1.2 kg as ISO 1133. Preferably, a combination of two or more kinds of polycarbonates having different flow expansions can be used. For example, 5 to 45% by weight of a polycarbonate resin having 60 to 150 g / 10 min and 55 to 95% by weight of a polycarbonate resin having 5 to 59 g / 10 min. In this case, excellent physical properties can be obtained.

The polycarbonate resin (A) is a mixture of a base resin (A) + (B) containing a polycarbonate resin (A), a modified (meth) acrylate resin (B), an aromatic vinyl resin (C) and an impact modifier ) + (C) + (D) in an amount of 40 to 80% by weight. Within this range, a balance of impact, flow, and coloring can be achieved. Preferably 60 to 75% by weight.

(B) a modified (meth) acrylate resin

The modified (meth) acrylate resin (B) of the present invention may be an aromatic or alicyclic (meth) acrylate polymer.

The aromatic or alicyclic (meth) acrylate polymer may have a refractive index ranging from 1.51 to 1.59. It has excellent compatibility with polycarbonate within the above range, and can have the morphology of the present invention.

The modified (meth) acrylate resin (B) can be polymerized by conventional bulk, emulsion and suspension polymerization methods. The modified (meth) acrylate resin (B) may be a homopolymer using one kind of (meth) acrylic monomer, a copolymer using two or more kinds of (meth) acrylic monomers, or a mixture thereof.

In an embodiment, the modified (meth) acrylate resin (B) is a polymer of (b1) 20 to 100% by weight of an aromatic or alicyclic (meth) acrylate and (b2) 0 to 80% by weight of a monofunctional unsaturated monomer. Preferably, the modified (meth) acrylate resin (B) is a polymer of (b1) 55 to 95% by weight of an aromatic or alicyclic (meth) acrylate and (b2) 5 to 45% by weight of a monofunctional unsaturated monomer. The modified (meth) acrylate resin (B) may be a polymer of (b1) 25 to 45% by weight of an aromatic or alicyclic (meth) acrylate and (b2) 55 to 75% by weight of a monofunctional unsaturated monomer. When the aromatic or alicyclic (meth) acrylate (b1) is used in an amount of 20 wt% or more, the average refractive index of the polymerized modified (meth) acrylate resin (B) can be maintained at 1.51 or more.

The (b1) aromatic or alicyclic (meth) acrylate may be represented by the following formula (2) or (3)

[Chemical Formula 1]

Wherein R ₁ is hydrogen or a methyl group, m is an integer of 0 to 10, Y is a substituted or unsubstituted cycloalkyl group having 5 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 20 carbon atoms Lt; RTI ID = 0.0 > to 20 < / RTI >

(2)

(Wherein R ₁ is hydrogen or a methyl group, m is an integer from 0 to 10, Z is oxygen (O) or sulfur (S), Ar is a substituted or unsubstituted cycloalkyl group having a carbon number of 5-10, a carbon number of 6 A substituted or unsubstituted aryl group having 1 to 20 carbon atoms, and an aralkyl group having 6 to 20 carbon atoms).

In a preferred embodiment, Y may be selected from the group consisting of a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a propylphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group and a benzylphenyl group.

In a preferred embodiment, Z may be selected from the group consisting of a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group and a benzylphenyl group.

Examples of the aromatic or alicyclic (meth) acrylate include cyclohexyl methacrylate, phenoxy methacrylate, 2-ethylphenoxy methacrylate, benzyl methacrylate, phenyl methacrylate, 2-ethylthiophenyl methacrylate 2-methylphenyl ethyl methacrylate, 2-methylphenyl ethyl methacrylate, 2-phenylphenyl methacrylate, 2-phenylphenyl methacrylate, 2- Methylphenyl) ethyl methacrylate, 2- (4-methoxyphenyl) ethyl methacrylate, 2- (4- 2- (4-chlorophenyl) ethyl methacrylate, 2- (2-chlorophenyl) ethyl methacrylate, 2- ) Ethyl methacrylate, 2- (4-bromophenyl) ethyl methacrylate, 2- (3-phenylphenyl) ethylmale And the like, methacrylate, and 2- (4-benzylphenyl) ethyl methacrylate such as methacrylic acid and methacrylate, but are not necessarily limited thereto. These may be used alone or in combination of two or more.

Examples of the monofunctional unsaturated monomer (b2) copolymerizable with the aromatic or alicyclic (meth) acrylate (b1) include esters of methacrylic acid esters, acrylic esters, unsaturated carboxylic acids, acid anhydrides, Amide, methacrylamide, acrylonitrile, methacrylonitrile, allyl glycidyl ether, glycidyl methacrylate, styrene-based monomer, and the like.

Specific examples include methacrylic acid esters including methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, hexyl methacrylate and 2-ethylhexyl methacrylate; Acrylate esters including methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, and 2-ethylhexyl acrylate; Unsaturated carboxylic acids including acrylic acid and methacrylic acid; Acid anhydrides including maleic anhydride; Esters containing hydroxy groups, including 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, monoglycerol acrylate; Nitriles including acrylamide, methacrylamide, acrylonitrile, and methacrylonitrile; Allyl glycidyl ether, glycidyl methacrylate, styrene monomers including styrene and alpha methyl styrene, and the like, but are not limited thereto. These may be used alone or in combination of two or more.

The modified (meth) acrylate resin (B) may have a weight average molecular weight of 5,000 to 300,000 g / mol. Excellent compatibility can be exhibited in the above range. In embodiments, the weight average molecular weight may be from 5,000 to 20,000 g / mol. In other embodiments, the weight average molecular weight may be from 30,000 to 100,000 g / mol.

(A), a modified (meth) acrylate resin (B), an aromatic vinyl resin (C) and an impact modifier (D), the modified (meth) acrylate resin (D) + (B) + (C) + (D). Within the above range, it has impact strength, heat resistance, flame retardancy, scratch resistance, high coloring and high transparency.

(C) an aromatic vinyl resin

The aromatic vinyl resin (C) of the present invention may be a polymer of an aromatic vinyl compound and a polymerizable unsaturated monomer.

In an embodiment, the aromatic vinyl resin (C) is a polymer comprising 70 to 100% by weight of an aromatic vinyl compound and 0 to 30% by weight of a polymerizable unsaturated monomer. In a concrete example, it may be a copolymer of 70 to 99% by weight of an aromatic vinyl compound and 1 to 30% by weight of a polymerizable unsaturated monomer.

Examples of the aromatic vinyl compound include styrene,? -Methylstyrene, halogen, or alkyl-substituted styrene, but are not limited thereto. These may be used alone or in admixture of two or more, preferably styrene.

Examples of the polymerizable unsaturated monomer include C ₁ -C ₈ methacrylic acid alkyl esters, C ₁ -C ₈ acrylic acid alkyl esters, maleic anhydride, C ₁ -C ₄ alkyl or phenyl nucleus-substituted maleimide. But is not limited to. These may be used alone or in combination of two or more.

As the aromatic vinyl resin (C), an aromatic vinyl compound not containing a rubber component may be used. Preferable examples of the aromatic vinyl resin (C) include a polystyrene resin (GPPS) or a styrene-cyanide vinyl copolymer resin (SAN). And most preferably styrene-cyanide vinyl copolymer resin (SAN).

A polymer of a monomer mixture of styrene and acrylonitrile and optionally methacrylate methyl ester; Polymers of monomer mixtures of acrylonitrile and optionally methacrylate methyl ester; Or a monomer mixture of styrene and? -Methylstyrene and acrylonitrile and optionally methacrylate methyl ester.

The aromatic vinyl resin (C) may be prepared by emulsion polymerization, suspension polymerization, solution polymerization or bulk polymerization, and preferably has a weight average molecular weight of 15,000 to 200,000 g / mol. Preferably, the weight average molecular weight is 50,000 to 170,000 g / mol. In the above range, excellent fluidity, scratch resistance, physical balance and morphology can be obtained.

In the present invention, when the aromatic vinyl resin (C) is added to the blend of the polycarbonate resin and the modified (meth) acrylate resin, the compatibility can be further improved. The aromatic vinyl resin (C) is a base resin (A) + ((A)) containing a polycarbonate resin (A), a modified (meth) acrylate resin (B), an aromatic vinyl resin 1 to 30% by weight, preferably 5 to 25% by weight, more preferably 10 to 20% by weight based on 100% by weight of (B) + (C) + (D)

(D) Impact reinforcement

The impact modifier (D) of the present invention may be a core-shell graft copolymer having a core-shell structure.

In an embodiment, the core-shell graft copolymer has a core-shell structure by grafting an unsaturated monomer containing an acrylic monomer to a core structure of the rubber to form a hard shell.

The core component may be a rubbery polymer polymerized from a monomer of a diene-based monomer, an acrylic monomer, a silicone-based monomer, or a combination thereof.

Examples of the diene-based monomer include C4 to C6 butadiene, isoprene, and the like. Of these, butadiene can be used. Specific examples of the rubber polymer polymerized with the diene monomer include butadiene rubber, styrene / butadiene rubber, acrylonitrile / butadiene rubber, isoprene rubber, and ethylene-propylene-diene terpolymer (EPDM).

Examples of the acrylic monomer include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, hexyl (meth) ) Acrylate, and the like. At this time, it is preferable to use at least one monomer selected from the group consisting of ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, (Meth) acrylate, triallyl cyanurate and the like can be used.

Examples of the silicon-based monomer include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trimethyltriphenylcyclotrisiloxane, tetramethyltetraphenylcyclotetrasiloxane, octaphenylcyclotetrasiloxane Or a combination thereof. At this time, a curing agent such as trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane or tetraethoxysilane can be used.

The average particle diameter of the rubbery polymer is preferably 0.05 to 0.5 탆, more preferably 0.07 to 0.5 탆. When the average particle diameter is in the above range, excellent appearance characteristics can be obtained while maintaining proper impact strength.

Preferably, the shell component may comprise an acrylic copolymer polymerized from an unsaturated monomer comprising an acrylic monomer.

As the acrylic monomer among the unsaturated compounds, alkyl (meth) acrylate, (meth) acrylic acid ester, or a combination thereof may be used. Specific examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl Acrylate, etc. Among these, methyl (meth) acrylate is preferable.

Preferably, the shell component does not contain a component contained in the dispersed phase. For example, the shell component does not include an aromatic vinyl-based component. Since an aromatic vinyl-based component is not contained, the impact modifier may exist at the interface between the dispersed phase and the continuous phase.

The impact modifier (D) may have an average particle size of 0.1 to 1.0 mu m. The dispersibility of the impact modifier in the above range is good.

The impact modifier (D) comprises a base resin (A) + (B) containing a polycarbonate resin (A), a modified (meth) acrylate resin (B), an aromatic vinyl resin (C) and an impact modifier 5 to 10% by weight of 100% by weight of + (C) + (D). Within this range, it has a balance of proper appearance characteristics, fluidity and impact strength of the resin.

(E) Flame retardant

As the flame retardant which can be used in the present invention, the difference between the average refractive index (Rr) and the average refractive index (Rc) of the continuous phase is 0.03 or less, preferably 0.02 or less.

As described above, the difference between the average refractive index and the refractive index of the continuous phase is minimized, so that excellent transparency, appearance, and impact strength can be obtained.

As the flame retardant, a phosphorus flame retardant may be preferably used. The phosphorus-based flame retardant may have a compound or polymer form, and in any case, the difference in average refractive index between the continuous phase and the continuous phase may be 0.03 or less.

Further, a single phosphorus flame retardant may be used alone or in combination of two or more. Preferably a single flame retardant is applied to facilitate control of the refractive index.

The flame retardant (E) is a base resin (A) + (B) containing the polycarbonate resin (A), the modified (meth) acrylate resin (B), the aromatic vinyl resin (C) and the impact modifier 8 to 15 parts by weight, preferably 10 to 14 parts by weight per 100 parts by weight of (C) + (D). And has a balance of excellent flame retardancy, refractive index and impact strength in such a content range.

The resin composition of the present invention may further include an additive optionally in accordance with the use. Examples of the additives include antioxidants, nucleating agents, surfactants, coupling agents, fillers, plasticizers, lubricants, antibacterial agents, mold release agents, heat stabilizers, light stabilizers, compatibilizers, inorganic additives, colorants, stabilizers, antistatic agents, pigments, But are not limited thereto, and they may be used alone or in combination.

The resin composition of the present invention can be produced in the form of a resin molded article according to a known resin production method. For example, the components of the present invention and other additives may be simultaneously mixed and then melt-extruded in an extruder to produce pellets. Such pellets can be used to produce plastic injection or compression molded articles. The molding method is not particularly limited, and for example, extrusion molding, injection molding, calender molding, vacuum molding, and the like can all be applied.

Another aspect of the present invention relates to a molded article molded from the resin composition. In the specific example, the molded article has an Izod impact strength of 10 to 50 kgf · cm / cm at a thickness of 1/8 "according to ASTM D-256, a flame resistance of V-0 at a thickness of 2 mm of UL 94 V, type scratch profile test may have a scratch width of 250 to 280 mu m.

Since the resin composition of the present invention is excellent in flame retardance, gold formation, impact strength, and gloss characteristics, it can be used in a wide variety of applications such as a television, a washing machine, a cassette player, MP3, DMB, navigation, A game machine, an audio player, a monitor, a computer, a printer, a copying machine, and the like.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example

Specific specifications of the components used in the following examples and comparative examples are as follows.

(A) Polycarbonate resin (PC): A polycarbonate resin (PC-1) having a flow index (300 DEG C, 1.2 kg) of 120 g / 10 min as measured by ISO 1133 and a polycarbonate resin ) Were mixed and used. The refractive index of the mixed polycarbonate was 1.58.

(Meth) acrylate resin (B) modified (meth) acrylate resin having a weight average molecular weight (Mw) of 35000 g / mol and a refractive index of 1.52 and being polymerized with MMA / PhMA (phenyl methacrylate) Resin.

(C) Aromatic Vinyl Resin: A SAN resin which was polymerized with 75% by weight of styrene and 25% by weight of acrylonitrile, a refractive index of 1.54, and a weight average molecular weight of 98000 g / mol was used.

(D) Impact reinforcement

(D1) core-shell copolymer having a polybutadiene core, a PMMA shell component and an average particle diameter of 200 to 500 nm was used.

(D2) A core-shell copolymer having a core of polybutadiene, a shell component of SAN, and an average particle diameter of 200 to 500 nm was used.

(E) Flame retardant

(E1) Resorcinol bis (diphenyl phosphate) having a refractive index of 1.57 was used.

(E2) isphenol-A bis (diphenyl phosphate) having a refractive index of 1.6 was used.

Example  1 to 3 and Comparative Example  1-4

0.5 parts by weight of an antioxidant (IRGANOX-1076) and 0.5 part by weight of a lubricant (UNISTER H-476) 0.5 (trade name) And pellets were prepared by extruding the mixture at 45 ° C in a twin screw type extruder at 250 ° C. The pellets were dried at 70 DEG C for 2 hours, and then the specimens were prepared at a molding temperature of 180 to 280 DEG C and a mold temperature of 40 to 80 DEG C using a 10 oz injection machine.

The properties of the prepared resin specimens were measured by the following methods, and the results are shown in Table 1 below.

(1) IZOD impact strength: Measured according to ASTM D256 (specimen thickness 1/8 ").

(2) Flow Index (MI): The melt flow index (g / 10 min) was measured at 220 캜 and 10 kg in accordance with ISO 1133.

(3) Vicat softening temperature (VST): Vicat softening temperature (占 폚) was measured under a load of 5 kg according to ISO R306.

(4) BSP (Ball-type scratch profile): A specimen of L (90 mm) × W (50 mm) × T (2.5 mm) was subjected to a load of 1000 g and a scratch speed of 75 mm / min, a scratch of 10 to 20 mm in length was applied, and the profile of the applied scratch was evaluated by scratch width by measuring the scratch width through a contact type surface profile analyzer (XP-1) of Ambios Co., Ltd. Respectively. (Unit: 占 퐉)

(5) Flame retardancy: The flame retardancy of a 2.0 mm thick specimen was measured according to the UL94 flame retardance specification.

(6) Weld line: The visibility of the flow mark was visually evaluated by a fusion fusion line (a joint surface where two flows meet at the time of melt injection) or a flow mark.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 (A) PC-1 28 26 24 28 32 17 28 PC-2 45 45 45 45 45 45 45 (B) 12 12 12 12 8 23 12 (C) 10 10 10 10 10 10 10 (D) (D1) 5 7 9 - 5 5 5 (D2) - - - 5 - - - (E) (E1) 10 10 10 10 10 10 - (E2) - - - - - - 10 IZOD impact strength 12 15 19 7 14 6 13 MI 37 34 34 38 33 37 35 VST 95 94 94 95 97 93 96 BSP 268 270 275 267 292 257 270 Flame Retardant V-0 V-0 V-0 V-0 V-0 V-1 V-0 Weld line Good Good Good Good Good Good Bad

As shown in Table 1, the resin composition of the present invention is excellent in impact strength, fluidity, heat resistance, scratch resistance, flame retardancy and appearance. On the contrary, Comparative Example 1 having no morphology of the present invention showed a significant decrease in impact strength, and Comparative Example 4 shows a decrease in appearance. In Comparative Examples 2 to 3 in which the modified (meth) acrylate resin was out of the range of the present invention, the impact strength, flame retardancy, or scratch resistance were reduced.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. As will be understood by those skilled in the art. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: continuous phase 20: dispersed phase
30: impact modifier

Claims (10)

Continuous phase; Dispersed phase; And an impact modifier (D) formed on the surface of the dispersed phase;
, ≪ / RTI >
The continuous phase comprises (A) a polycarbonate resin, (B) a modified (meth) acrylate resin and (E) a flame retardant,
Wherein the dispersed phase comprises (C) an aromatic vinyl resin;
Wherein the modified (meth) acrylate resin (B) is 10 to 20 wt% of (A) + (B) + (C) + (D).
The scratch-resistant high-impact flame-retardant resin composition according to claim 1, wherein the difference between the average refractive index (Rc) of the continuous phase and the average refractive index (Rr) of the flame retardant is 0.03 or less.
The scratch resistant resin composition according to claim 1, wherein the difference between the average refractive index (Rc) of the continuous phase and the average refractive index (Rd) of the dispersed phase is 0.03 or less.
The scratch resistant resin composition according to claim 1, wherein the impact modifier has a core-shell structure.
5. The scratch resistant resin composition according to claim 4, wherein the shell component comprises an acrylic copolymer.
The scratch-resistant high-impact flame-retardant resin composition according to claim 1, wherein the dispersed phase does not contain a rubber component.
2. The scratch resistant resin composition according to claim 1, wherein the modified (meth) acrylate resin comprises an aromatic or alicyclic (meth) acrylate polymer.
The scratch resistant resin composition according to claim 1, wherein the polycarbonate resin is a combination of two or more kinds of polycarbonates having different flow exponents.
The impact-resistant flame-retardant scratch-resistant resin composition according to claim 1, wherein the impact modifier (D) comprises 5 to 10% by weight of (A) + (B) + Resin composition.
A molded article made from the resin composition of any one of claims 1 to 9 and having an Izod impact strength of 10 to 50 kgf · cm / cm at a thickness of 1/8 "according to ASTM D-256, a flame resistance Is V-0, and a scratch width by a Ball-type Scratch Profile (BSP) test is 250 to 280 탆.

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