KR102513805B1 - Polycarbonate resin composition and molded articles thereof - Google Patents

Abstract

The present invention relates to polycarbonate resin compositions and articles thereof. More specifically, it relates to a polycarbonate resin composition having excellent flexural strength and low smoke density characteristics, and a molded article including the same.

Description

Polycarbonate resin composition and molded article containing the same {POLYCARBONATE RESIN COMPOSITION AND MOLDED ARTICLES THEREOF}

The present invention relates to a polycarbonate resin composition having excellent flexural strength and low smoke density characteristics, and a molded article including the same.

Polycarbonate resin is a resin prepared by condensation polymerization of an aromatic diol such as bisphenol A and a carbonate precursor such as phosgene, and has excellent mechanical and thermal properties. In particular, non-halogen flame retardant polycarbonate resins characterized by excellent melt stability for extrusion are applied to a wide range of fields such as exterior materials for electrical and electronic products, automobile parts, building materials, and optical parts.

Polycarbonate resin has an effective flame retardant mechanism in the early, middle and late stages of combustion, radical trap effect, oxygen blocking effect, insulation effect, heat absorption effect, when compared with other polymer resins in terms of polymer decomposition behavior, flame retardant decomposition behavior, and carbide formation behavior. have etc.

However, polycarbonate, which is an organic material composed of carbon, hydrogen, etc., has a property that is easy to combust, and the flame suppression effect is not excellent compared to the excellent flame retardant effect. This is because the flame retardant suppresses oxidation in the gas phase where flame retardancy exerts a great effect, increasing smoke.

Accordingly, the present inventors synthesized a polycarbonate resin composition in which talc and zinc borate were added in a specific weight ratio to polycarbonate and a high heat-resistant polymer resin was mixed, and the smoke density during combustion was significantly reduced with excellent flame retardant effect, and in addition, bending The present invention was completed by confirming that the strength can be improved.

Korean Patent Publication No. 10-2008-0047310

The present invention is to provide a polycarbonate resin composition having excellent flexural strength and low smoke density characteristics, and a molded article including the same.

In order to solve the above problems, the present invention is polycarbonate resin, acrylonitrile-butadiene-styrene-based (ABS) resin, aromatic phosphate ester-based compound, silicone-based rubber, polyphenylene sulfide (polyphenylene sulfide) resin, talc (talc) And it provides a polycarbonate resin composition containing zinc borate (Zinc Borate).

In addition, the present invention provides an article comprising the above polycarbonate resin composition.

Hereinafter, the present invention will be described in detail.

polycarbonate resin

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

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

In addition, as the carbonate precursor, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate, diphenyl carbonate, ditolyl carbonate, bis(chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis (diphenyl) carbonate, carbonyl chloride (phosgene), triphosgene, diphosgene, carbonyl bromide or bishaloformate, and the like, and any one or a mixture of two or more of these may be used, among which tri Phosgene or phosgene may be used.

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

[Formula 1]

In Formula 1,

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

Z is C _1-10 alkylene unsubstituted or substituted by phenyl, C _3-15 cycloalkylene unsubstituted or substituted by C _1-10 alkyl, O, S, SO, SO ₂ , and CO selected from the group.

More specifically, in Formula 1, R ₁ to R ₄ are each independently hydrogen, methyl, chloro, or bromo, and Z is methylene, ethane-1,1-diyl, propane-2,2-diyl, butane- O, _S , SO , SO ₂ , or CO. More specifically, in Chemical Formula 1, Z may be cyclohexane-1,1-diyl, O, S, SO, SO ₂ , or CO.

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

[Formula 1-1]

In addition, the polycarbonate resin may have a flow index (MI) (265 ° C, 5 kg) of 5 to 15 g / 10 min, or 7 to 13 g / 10 min, measured according to ISO 1133, and mechanical strength within this range It has an excellent effect.

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

In addition, the polycarbonate resin may be included in an amount of 25 to 65 parts by weight based on 100 parts by weight of the resin composition. preferably 30 parts by weight or more, 35 parts by weight or more, or 40 parts by weight or more; 60 parts by weight or less, 55 parts by weight or less, or 50 parts by weight or less.

If the content of the polycarbonate resin is less than 25 parts by weight, there is a problem of being weak against impact, and if it exceeds 65 parts by weight, there may be a problem that the specifications are not satisfied during a flame test.

Acrylonitrile-butadiene-styrene-based (ABS) resin

The acrylonitrile-butadiene-styrene-based (ABS) resin is a component having excellent impact strength, tensile strength, and elastic modulus, and is an impact reinforcing agent added to improve impact resistance, heat resistance, moldability, etc. of polycarbonate resin, according to the present invention. By being used in combination with other components in a specific amount, it is possible to improve flame retardancy and mechanical and thermal properties compared to the case of using only acrylonitrile-butadiene-styrene-based (ABS) resin alone.

The acrylonitrile-butadiene-styrene-based resin is not particularly limited, but is prepared in a powder state by emulsion graft polymerization of butadiene-based rubber, acrylonitrile-based monomers, and styrene-based monomers, and then agglomeration, dehydration, and drying of the same. can

The above-mentioned acrylonitrile-butadiene-styrene-based (ABS) resin can be directly synthesized according to a well-known synthesis method of a general acrylonitrile-butadiene-styrene-based (ABS) resin, or commercially available acrylonitrile-butadiene- Styrene-based (ABS) resins can be obtained and used.

Meanwhile, the acrylonitrile-butadiene-styrene-based (ABS) resin may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the resin composition. preferably 0.2 parts by weight or more, 0.3 parts by weight or more, or 0.5 parts by weight or more; 4 parts by weight or less, 3 parts by weight or less, or 2 parts by weight or less.

When the content of the acrylonitrile-butadiene-styrene (ABS) resin is less than 0.1 parts by weight, there is a problem of lowering melt strength during extrusion, and when it exceeds 5 parts by weight, there is a problem of lowering flame retardancy. there is.

Aromatic Phosphate Ester Compound

The aromatic phosphate ester-based compound is a phosphorus-based flame retardant added to improve the flame retardancy of the polycarbonate resin, and is used in combination with other components of the present invention in a specific amount, compared to when the aromatic phosphate ester-based compound is used alone. Flame retardancy and suppression properties can be improved.

The aromatic phosphate ester compound is composed of bisphenol A diphosphate (BPADP), triphenyl phosphate, tricresyl phosphate, trixyreyl phosphate, cresyl diphenyl phosphate, octyl diphenyl phosphate and aromatic diphosphate represented by the following formula (2) It may contain one or more selected from the group:

[Formula 2]

In Formula 2,

Ar ₁ to Ar ₄ are each independently a C _{6-30 aryl in which C 6-30 alkyl} is substituted or unsubstituted;

이고,R is phenylene or

ego,

n is an integer from 1 to 5;

The aromatic phosphoric acid ester-based compound may preferably be bisphenol A diphosphate (BPADP).

The aforementioned aromatic phosphate ester-based compound may be directly synthesized according to a well-known synthesis method for general aromatic phosphate ester-based compounds, or commercially available aromatic phosphate ester-based compounds may be obtained and used.

The aromatic phosphoric acid ester compound may be included in an amount of 5 to 15 parts by weight based on 100 parts by weight of the resin composition. Preferably, it may be included in 6 to 14 parts by weight, or 7 to 13 parts by weight.

When the content of the aromatic phosphoric acid ester compound is less than 5 parts by weight, there is a problem of inferior flame retardancy, and when it exceeds 15 parts by weight, there is a problem of lowering strength and smoke density.

silicone rubber

The silicone-based rubber is an impact reinforcing agent for appropriately reinforcing the impact strength of the polycarbonate resin composition and its molded product, and is used in combination with other components of the present invention in a specific amount, when only the aromatic phosphate ester-based compound is used alone. Compared to this, the effect of reducing processing pressure and improving impact can be seen.

As the silicone-based rubber, a silicone-acrylic rubber may be used, which has a core-shell structure. In the core-shell structure, acrylate rubbers include methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, 2-ethylhexyl (meth) A rubber formed from (meth)acrylate monomers such as acrylate or hexyl(meth)acrylate may be used, and for the formation of such rubber, ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, A curing agent such as 1,3-butylene glycol di(meth)acrylate, 1,4-butylene glycol di(meth)acrylate, allyl(meth)acrylate, or triallyl cyanurate may be further used.

In the core-shell structure, silicone rubber made from cyclosiloxane may be used, and specific examples thereof include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and trimethyl What is prepared from at least one selected from the group consisting of triphenylcyclotrisiloxane, tetramethyltetraphenylcyclotetrosiloxane, and octaphenylcyclotetrasiloxane may be used. For the formation of such silicone rubber, a curing agent such as trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane, or tetraethoxysilane may be further used.

Meanwhile, the silicone content of the silicone-based rubber may be 80 to 98 parts by weight based on 100 parts by weight of the silicone-based rubber. preferably 82 parts by weight or more, 84 parts by weight or more, or 86 parts by weight or more; 96 parts by weight or less, or 94 parts by weight or less.

The silicone-based rubber may be included in an amount of 3 to 10 parts by weight based on 100 parts by weight of the resin composition. Preferably, it may be 3 to 9 parts by weight, 3 to 8 parts by weight, or 3 to 7 parts by weight.

When the content of the silicone-based rubber is less than 3 parts by weight, there is a problem of easy breakage, and when it exceeds 10 parts by weight, there is a problem of reduced flame retardancy.

Polyphenylene sulfide resin

The polyphenylene sulfide resin is excellent in various properties such as heat resistance, dimensional stability, chemical resistance, flame retardancy, processability, and excellent mechanical strength, and is used in combination with other components of the present invention in a specific amount, so that polyphenylene sulfide It can play a positive role in the heat resistance increase and flame test compared to the case of using only the resin alone.

The polyphenylene sulfide resin may be of a linear type, a branched type, or a cross-linked type depending on the manufacturing method, and any of them may be applied without limitation in the present invention. Preferably, a polyphenylene sulfide resin containing a para structure represented by Chemical Formula 3 and an ortho structure represented by Chemical Formula 4 in a molar ratio of 4:6 to 6:4 may be used.

[Formula 3]

[Formula 4]

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

The polyphenylene sulfide resin may be included in an amount of 10 to 20 parts by weight based on 100 parts by weight of the composition. preferably 11 parts by weight or more, 12 parts by weight or more, or 13 parts by weight or more; 19 parts by weight or less, 18 parts by weight or less, or 17 parts by weight or less.

When the content of the polyphenylene sulfide resin is less than 10 parts by weight, there is no effect on the flame test, and when it exceeds 20 parts by weight, there is a problem of weakening the impact.

Talc and Zinc Borate

The talc and zinc borate are components added to reduce the smoke density of the polycarbonate resin, and the talc has an effect of lowering the smoke density, and the zinc borate has an effect beyond the use of a high heat-resistant polymer resin. In particular, talc improves incombustibility as a flame retardant, and zinc borate can perform both flame retardant and smoke suppression functions by generating moisture and suppressing secondary soot.

On the other hand, the weight ratio of the talc and zinc borate may be 1: 1 to 1: 2. Preferably, it may be 1:1.1 to 1:1.9, 1:1.2 to 1:1.8, or 1:1.3 to 1:1.7.

When the weight ratio of talc and zinc borate is less than 1:1, there is a problem in that the flame standard (EN45545-2) is not satisfied during the flame experiment, and when it exceeds 1:2, only the physical properties do not work positively in the flame experiment There is a problem with deterioration.

The talc may be included in an amount of 5 to 15 parts by weight based on 100 parts by weight of the resin composition. preferably 6 parts by weight or more, 7 parts by weight or more, or 8 parts by weight or more; 14 parts by weight or less, 13 parts by weight or less, or 12 parts by weight or less.

When the content of the talc is less than 5 parts by weight, there is a problem of not satisfying the flame specifications during the flame experiment, and when it exceeds 15 parts by weight, there is a problem of deterioration in physical properties.

The zinc borate may be included in 10 to 20 parts by weight based on 100 parts by weight of the composition. preferably 11 parts by weight or more, 12 parts by weight or more, or 13 parts by weight or more; 19 parts by weight or less, 18 parts by weight or less, or 17 parts by weight or less.

When the content of zinc borate is less than 10 parts by weight, there is a problem of not satisfying the flame specifications during a flame experiment, and when it exceeds 20 parts by weight, there is a problem of deterioration in physical properties.

Polycarbonate resin composition and manufacturing method thereof

The polycarbonate resin composition includes the above-described polycarbonate resin, acrylonitrile-butadiene-styrene (ABS) resin, aromatic phosphate ester-based compound, silicone-based rubber, polyphenylene sulfide resin, talc and boric acid By including zinc (Zinc Borate) in a specific content ratio, it exhibits excellent flexural strength while maintaining the advantage of easy injection molding of the polycarbonate resin and excellent flame retardancy, and has a remarkably low smoke density.

Specifically, the polycarbonate resin composition may have a smoke density of 350 or less as measured according to ISO 5659-2 and ASTM E662 at a thickness of 2.5 mm. Preferably, it may be 345 or less, 340 or less, 335 or less, 330 or less, 325 or less, or 320 or less. In addition, the lower the smoke density, the better, so there is no lower limit, but for example, it may be 150 or more, 170 or more, or 200 or more.

In addition, the polycarbonate resin composition may have a flexural strength of 50,000 to 70,000 kg/cm ² measured according to ASTM D790. preferably, 51,000 kg/cm ² or more, 52,000 kg/cm ² or more, or 53,000 kg/cm ² or more; 69,000 kg/cm ² or less, 68,000 kg/cm ² or less, 67,000 kg/cm ² or less, or 66,000 kg/cm ^{2 or} less.

In addition, according to the UL94 standard, the polycarbonate resin composition may have a flame retardancy rating of V0 measured for a specimen having a thickness of 1.5 mm.

On the other hand, the polycarbonate resin composition is a step of mixing the above-described polycarbonate resin, acrylonitrile-butadiene-styrene-based (ABS) resin, aromatic phosphate ester-based compound, silicone-based rubber and polyphenylene sulfide (polyphenylene sulfide) resin ( Step 1); and mixing zinc borate and talc with the mixture of step 1 (step 2); The above manufacturing method prevents zinc borate and talc from vaporizing and flying by receiving heat and pressure during the preparation of step 1, thereby maximizing the effect of improving physical properties by zinc borate and talc in the polycarbonate resin composition.

Preferably, in step 1, kneading/melting may proceed for 1 to 5 minutes, and the reaction temperature may be 200 °C to 300 °C.

Preferably, in step 2, kneading/melting may proceed for 1 to 5 minutes, and the reaction temperature may be 200 °C to 300 °C.

In step 2, zinc borate is introduced into the side input port (first side input port) instead of being introduced into the main hopper of the extruder. When the extrusion proceeds in the above method, the mixing time is reduced, reducing the flying of zinc borate into gas during the reaction, and maximizing the effect of reducing the smoke density.

When the zinc borate is introduced into the side inlet, it may be performed at a temperature of 200 °C to 300 °C.

On the other hand, the method of injecting talc through another side inlet (second side inlet) of the extruder in addition to the side inlet reduces the mixing time in the extrusion process, thereby reducing the talc from flying into gas during the reaction and reducing the smoke density. Maximize.

When the talc is added to the side inlet, it may be carried out at a temperature of 200 ° C to 300 ° C.

Preferably, the method of injecting zinc borate into the side inlet and the method of injecting talc into the side inlet can be performed simultaneously.

The resin composition is a compatibilizer, antioxidant, heat stabilizer, light stabilizer, plasticizer, antistatic agent, nucleating agent, flame retardant, lubricant, impact modifier, optical brightener, radiation absorber, ultraviolet absorber, It may further include one or more additives selected from the group consisting of pigments and dyes.

The compatibilizing agent is used to increase compatibility when two types of polymers are mixed and used. Compatibility means that the two polymers are uniformly mixed or dispersed when two polymers are mixed. If the compatibility is poor, the physical properties of each polymer are expressed as they are, and the physical properties of each other cannot be complemented in the composition.

The compatibilizer is not particularly limited as long as it is a material used in the art, but preferably, styrene-ethylene/butylene-styrene-glycidyl methacrylate copolymer (SEBS-GMA), ethylene-glycidyl methacrylate copolymer (EGMA), etc. can be used there is.

The resin composition may be prepared by mixing the above-described components, photoreactive compounds, and additives if necessary, and as will be described below, it is preferable to melt-knead the resin composition into pellets in order to prepare a molded product.

The melt kneading may be performed by a method commonly used in the art, such as a ribbon blender, a Henschel mixer, a Banbury mixer, a drum tumbler, a single screw extruder, a twin screw extruder, a cornider, a multi screw screw extruder, and the like. can The temperature of the melt kneading may be appropriately adjusted as necessary, and may be adjusted to a temperature of 200 ° C to 300 ° C, for example.

molding

In addition, the present invention provides a molded article including the resin composition. The molded article is not particularly limited, but is preferably a part for a railway vehicle or a part for a router. The resin composition has excellent flame retardancy, excellent flexural strength, and low smoke density. Accordingly, when the manufacturing process of the molded product or the molded product is applied to an actual product, external deformation is significantly reduced, so that it can be usefully used as a part for a railway vehicle or a part for a router.

The manufacturing method of the molded article may be manufactured by a method commonly used in the art. For example, injection molding method, injection compression molding method, extrusion molding method, vacuum molding method, blow molding method, press molding method, pressure molding method, foam molding method, thermal bending molding method, compression molding method, Forming methods such as calender molding and rotational molding can be applied.

The size and thickness of the molded article may be appropriately adjusted according to the purpose of use, and may have a flat or curved shape depending on the purpose of use.

The polycarbonate resin composition and molded products thereof according to the present invention have excellent flexural strength and low smoke density.

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

substance used

(1) PC: LUPOY PC 1300-03, 1600-03, 1300-10 (LG Chem)

(2) ABS: ABS HS230-DP (LG Chem)

(3) Silicone rubber: Metablen SX005 (Mitsubishi)

(4) BPADP (Adeka)

(5) PPS: PPS containing para and ortho structures in a molar ratio of 5:5 (LG Chem)

(6) Talc: Talc 6300,3000C (Koch, 95% particle size less than 3.3 μm, density 2.8 g/cm ³ ), Talc 3CA (IMERYS)

(7) Zinc borate: Firebrake ZB (US BORAX)

(8) SEBS-GMA: Polinker PL6210 (Polyalloy)

(9) EGMA: IGETABOND E (Sumitomo)

Example 1

After mixing with a mixer except for zinc borate and talc among the components shown in Table 1 below, twin-screw extruder (L / D = 42, Φ = 40, barrel temperature 260 ℃, extrusion rate 50 kg / hr ) was kneaded/melted for 1 to 3 minutes. Thereafter, zinc borate and talc were added through the side inlet, and additional mixing/melting was performed at 280° C. for 1 to 3 minutes, followed by extrusion processing to prepare pellets. The prepared pellets were dried at 80 ° C. for more than 4 hours in a convection oven, and then injection molded and left at room temperature for more than 48 hours to prepare a specimen (width * length * thickness: 7.5 mm * 7.5 mm * 2.5 mm).

Example 2 and Example 3

Specimens of Examples 2 and 3 were prepared in the same manner as in Example 1 according to the content of each component shown in Table 1 below.

Comparative Examples 1 to 5

Specimens of Comparative Examples 1 to 5 were prepared in the same manner as in Example 1 according to the content of each component shown in Table 1 below.

Unit: parts by weight
(Based on 100 parts by weight of composition) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 PC 46 44 44 61 66 61 61 61 ABS One One One 6 One One One One silicone rubber 5 5 5 - 5 5 5 5 BPADP 8 8 8 8 8 8 8 8 PPS 15 15 15 - - - - - talc 10 10 10 10 10 10 10 15 Zinc borate 15 15 15 15 10 - - 10 calcium borate - - - 15 - - Mg(OH) ₂ - - - - 15 SEBS-GMA 2 EGMA 2

Experimental example

The physical properties of the specimens of Examples and Comparative Examples were measured in the following manner, and the results are shown in Table 3 below.

(1) Flexural strength (kg/cm ² ): measured at 1.3 mm/sec in accordance with ASTM D790.

(2) Smoke density: Smoke density was measured in accordance with ISO 5659-2 and ASTM E662 at a thickness of 2.5 mm.

(3) Flame retardancy: Flame retardancy was evaluated according to UL 94V. Specifically, 5 flame retardant specimens having a thickness of 1.5 mm required for application of the flame retardant test were prepared and evaluated according to the following. First, after gluing a 20 mm high flame to the specimen for 10 seconds, the burning time (t1) of the specimen was measured, and the combustion pattern was recorded. Then, when the combustion was terminated after the first folding, the burning time (t2) and the sparking time (glowing time, t3) of the specimen after 10 seconds of folding were measured, and the combustion pattern was recorded. The same was applied to the five specimens, and then evaluated based on the criteria in Table 2 below.

(4) Flame specification: The flame specification was measured by heating at a heating intensity of 50 kw/m ² using a cone calorimeter in accordance with ISO 5660-1.

Flammability rating V0 V1 V2 Individual burning time (t1 or t2 of individual specimen) 10 seconds or less 30 seconds or less 30 seconds or less Total burning time of 5 specimens (sum of t1 and t2 of 5 specimens) 50 seconds or less 250 seconds or less 250 seconds or less Combustion and spark formation time after the second gluing (sum of t2 and t3 of individual specimens) 30 seconds or less 60 seconds or less 60 seconds or less Ignition of cotton wool by loading doesn't exist doesn't exist has exist

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 flexural strength
(kg/cm ² ) 54,800 55,000 55,100 22,100 25,500 29,000 28,800 32,700 smoke density
(D4) 315 319 311 371 411 780 699 423 flame retardant V0 V0 V0 V0 V0 V0 V0 Flame standard 98 86 89 113 91 110 131 86

Referring to Table 3, it was confirmed that the polycarbonate resin compositions of Examples had excellent flexural strength and significantly reduced smoke density. Accordingly, it was confirmed that the embodiments according to the present invention can maintain excellent quality even when applied to products and placed in various extreme environments.

On the other hand, it was confirmed that Comparative Examples 1 to 5, which did not contain PPS, had significantly inferior flexural strength compared to the Examples.

In addition, when zinc borate was used, it was confirmed that the smoke density was significantly reduced compared to the case where calcium borate or Mg(OH) ₂ was used.

Claims (11)

Contains polycarbonate resin, acrylonitrile-butadiene-styrene (ABS) resin, aromatic phosphate ester-based compound, silicone-based rubber, polyphenylene sulfide resin, talc and zinc borate ,
The flexural strength measured according to ASTM D790 is 50,000 to 70,000 kg/cm ² ,
A polycarbonate resin composition.
According to claim 1,
The aromatic phosphate ester-based compound is bisphenol A diphosphate (BPADP),
A polycarbonate resin composition.
According to claim 1,
With respect to 100 parts by weight of the silicone-based rubber, the silicone content is 80 to 98 parts by weight,
A polycarbonate resin composition.
According to claim 1,
The weight ratio of the talc and zinc borate is 1: 1 to 1: 2,
A polycarbonate resin composition.
According to claim 1,
The smoke density measured according to ISO 5659-2 and ASTM E662 at a thickness of 2.5 mm is 350 or less,
A polycarbonate resin composition.
delete According to claim 1,
In accordance with UL94, the flammability rating measured on a 1.5mm thick specimen is V0,
A polycarbonate resin composition.
The method of claim 1, with respect to 100 parts by weight of the polycarbonate resin composition,
25 to 65 parts by weight of a polycarbonate resin;
0.1 to 5 parts by weight of an acrylonitrile-butadiene-styrene-based (ABS) resin;
5 to 15 parts by weight of an aromatic phosphoric acid ester compound;
3 to 10 parts by weight of silicone rubber;
10 to 20 parts by weight of polyphenylene sulfide resin;
5 to 15 parts by weight of talc; and
Containing 10 to 20 parts by weight of zinc borate,
A polycarbonate resin composition.
mixing a polycarbonate resin, an acrylonitrile-butadiene-styrene (ABS) resin, an aromatic phosphate ester-based compound, a silicone-based rubber, and a polyphenylene sulfide resin (Step 1); and
Including, mixing zinc borate and talc with the mixture of step 1 (step 2);
A method for producing a polycarbonate resin composition.
Comprising the polycarbonate resin composition of any one of claims 1 to 5, 7 and 8,
molding.
According to claim 10,
The molded article is a part for a railway vehicle or a part for a router,
molding.