KR102065971B1 - Polycarbonate resin composition and article thereof - Google Patents

Abstract

The present disclosure relates to a polycarbonate resin composition and a molded article thereof, and more particularly, to a) a melt index (300 ° C., 1.2 kgf) of 16 to 25 g / 10 minutes of a polycarbonate resin 30 to 60 wt%, b) a polycarbonate 10 to 30% by weight of polysiloxane copolymer, c) 1 to 15% by weight of vinylcyan compound-conjugated diene compound-vinylaromatic compound copolymer, d) 5% to 15% by weight of polybutylene terephthalate resin, e A) 1 to 20% by weight of the maleimide copolymer, f) more than 3 to less than 10% by weight of the silicone impact modifier, g) 0.01 to 5% by weight of the nucleating agent, h) more than 0.2 to 0.8% by weight of the ester exchange inhibitor It relates to a polycarbonate resin composition and molded article thereof, comprising less than%, and i) 0.01 to 5% by weight additive.
According to the present invention, a polycarbonate resin composition having excellent chemical resistance, low temperature impact resistance, heat resistance and fluidity, that is, molding processability, which are difficult to be compatible with each other in a trade-off relationship in a polycarbonate resin, has an effect of providing a molded article thereof. have.

Description

Polycarbonate resin composition and molded article thereof {POLYCARBONATE RESIN COMPOSITION AND ARTICLE THEREOF}

The present disclosure relates to a polycarbonate resin composition and a molded article thereof, and more particularly, to chemical, impact resistance, in particular, low temperature impact resistance, heat resistance and fluidity, which are difficult to be compatible with each other in a trade-off relationship in polycarbonate resin. That is, the present invention relates to a polycarbonate resin composition excellent in molding processability and molded articles thereof.

Polycarbonate resins are thermoplastic resins produced by reacting bisphenol A with phosgene. The polycarbonate resins are known to be transparent because they are amorphous, have excellent heat resistance and electrical insulation, and have the highest impact strength among thermoplastic resins. In addition, polycarbonate resins are known as engineering plastics that are extremely small in dimensional change due to moisture absorption and stable in physical properties even with temperature change, and thus resistant to environmental changes. However, there are drawbacks such as poor chemical resistance and moldability.

In order to improve the poor chemical resistance and moldability of the polycarbonate resin, a method of mixing a conventional ABS resin and PBT resin has been devised, but on the contrary, the impact resistance and the heat resistance are inferior, and when the impact modifier is further added to improve the impact resistance The problem that the heat resistance further fell has arisen.

In addition, U.S. Patent Nos. 4,393,153, 4,180,494, and 4,906,202 have attempted to improve fluidity, that is, molding processability, chemical resistance, impact resistance, and heat resistance. If the back is improved, the problem of poor fluidity, that is, moldability, is still not solved.

Therefore, in recent years, there is an urgent need to develop a technology that improves the above problems in a situation in which demand for polycarbonate resin is rapidly increasing in many fields.

In order to solve the problems of the prior art as described above, the present substrate is difficult to be compatible with each other in a trade-off relationship in polycarbonate resin, chemical resistance, impact resistance, in particular low temperature impact resistance, heat resistance and fluidity, that is, molding processability It aims at providing the polycarbonate resin composition excellent in all these, and its molded article.

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

In order to achieve the above object, the present invention is a) melt index (300 ℃, 1.2kgf) 16 to 25 g / 10 minutes polycarbonate resin 30 to 60% by weight, b) polycarbonate-polysiloxane copolymer 10 to 30 % By weight, c) 1 to 15% by weight of vinylcyan compound-conjugated diene compound-vinylaromatic compound copolymer, d) 5% to 15% by weight of polybutylene terephthalate resin, e) maleimide copolymer 1 To 20% by weight, f) greater than 3% to less than 10% by weight of silicone impact modifier, g) 0.01 to 5% by weight of nucleating agent, h) greater than 0.2% to less than 0.8% by weight of ester exchange inhibitor, and i) additive It provides a polycarbonate resin composition comprising 0.01 to 5% by weight.

In addition, the present invention provides a molded article characterized in that it is prepared from the polycarbonate resin composition.

According to the present disclosure, a polycarbonate resin composition and its molded article having excellent chemical resistance, impact resistance, particularly low temperature impact resistance, heat resistance and flowability, that is, molding processability, which are difficult to be compatible with each other in a trade-off relationship in polycarbonate resin. Has the effect of providing.

Hereinafter, the polycarbonate resin composition of this description and its molded article are demonstrated in detail.

The present inventors control the viscosity by mixing ABS resin with polycarbonate resin, and by introducing a processing agent (minimizing the shear stress between the resin and the screw during injection, and the silicone (silicone) having excellent chemical resistance When using a) impact reinforcing agent, and take the components in a predetermined content ratio, it was confirmed that the polycarbonate resin composition prepared to have excellent chemical resistance, low temperature impact resistance and heat resistance, but also excellent molding processability, based on this To complete.

The polycarbonate resin composition of the present disclosure comprises a) a melt index (300 ° C., 1.2 kgf) of 30 to 60% by weight of polycarbonate resin at 16 to 25 g / 10 minutes, b) 10 to 30% by weight of polycarbonate-polysiloxane copolymer, c) 1 to 15% by weight of vinylcyan compound-conjugated diene compound-vinylaromatic compound copolymer, d) 5% to 15% by weight of polybutylene terephthalate resin, e) 1 to 20% by weight of maleimide copolymer %, f) greater than 3 weight percent to less than 10 weight percent of silicone-based impact modifier, g) 0.01 to 5 weight percent of nucleating agent, h) greater than 0.2 weight percent to less than 0.8 weight percent of ester exchange inhibitor, and i) 0.01 to 5 additives It comprises a weight percent.

The polycarbonate resin a) may be, for example, a melt index (300 ° C., 1.2 kgf) of 18 to 20 g / 10 minutes, 21 to 25 g / 10 minutes, or a mixture thereof, and formability within this range. Excellent effect.

The a) polycarbonate resin may be, for example, 40 to 50% by weight, 45 to 49% by weight, or 46 to 48% by weight, and excellent moldability and impact strength within this range.

For example, the polycarbonate resin has a weight average molecular weight of 20,000 to 70,000 g / mol, preferably 40,000 to 60,000 g / mol, and has excellent effects of chemical resistance, mechanical properties, molding processability, and impact resistance within this range. .

B) The polycarbonate-polysiloxane copolymer may be, for example, 15 to 25% by weight, or 15 to 20% by weight, and has excellent effects at low temperature impact resistance and chemical resistance within this range.

B) The polycarbonate-polysiloxane copolymer may have, for example, a melt index (300 ° C., 1.2 kgf) of 5 to 20 g / 10 minutes, 7 to 15 g / 10 minutes, or 8 to 12 g / 10 minutes. It is effective in impact resistance and chemical resistance within the range.

The polycarbonate-polysiloxane copolymer is not particularly limited in the case of the polycarbonate-polysiloxane copolymer that can be commonly used in the art, and specific examples include 1 to 25% by weight of the siloxane copolymer having a hydroxy end group and 75 to polycarbonate resin. It may be a copolymer containing 99% by weight, there is an effect excellent in impact resistance and chemical resistance within this range.

The c) vinyl cyan compound-conjugated diene compound-vinylaromatic compound copolymer may be, for example, c) acrylonitrile-butadiene-styrene copolymer.

C) The vinyl cyan compound-conjugated diene compound-vinylaromatic compound copolymer may be, for example, 1 to 10% by weight, or 3 to 8% by weight, and has excellent viscosity and moldability within this range.

C) The vinyl cyan compound-conjugated diene compound-vinylaromatic compound copolymer is, for example, 30 to 70% by weight of the vinylaromatic compound in 10 to 60% by weight of the conjugated diene rubber having an average particle diameter of 0.1 to 2 μm, or 0.5 to 1.5 μm, And it is a graft polymerized copolymer including 5 to 20% by weight of a vinyl cyan compound, the impact strength, formability and surface properties of the polycarbonate resin composition of the present invention within this range is excellent.

In the present description, the average particle diameter may be measured by a dynamic laser light skating method using a Nicomp 370HPL device manufactured by Nicomp.

The d) polybutylene terephthalate resin may be an intrinsic viscosity (η) of 0.5 to 1.0 dl / g, or 0.8 to 1.0 dl / g, for example, the mechanical properties of the polycarbonate resin composition of the present disclosure within this range And molding processability is excellent.

The e) maleimide copolymer may be, for example, 5 to 15% by weight, or 5 to 10% by weight, and has excellent impact resistance and heat resistance within this range.

The e) maleimide-based copolymer is not particularly limited in the case of the maleimide-based copolymer that can be commonly used in the art, and may be, for example, a copolymer including N-substituted maleimide.

The copolymer including the N-substituted maleimide may be, for example, an N-substituted maleimide-aromatic vinyl compound copolymer or an N-substituted maleimide-aromatic vinyl compound-maleic anhydride copolymer.

Examples of the N-substituted maleimide include N-methyl maleimide, N-ethyl maleimide, N-propyl maleimide, Nt-butyl maleimide, N-isopropyl maleimide, N-cyclohexyl maleimide and N-phenyl It may be one or more selected from the group consisting of maleimide, N-naphthylmaleimide and N-chlorophenylmaleimide.

The e) maleimide copolymer may include, for example, 20 to 70% by weight of N-substituted maleimide, or 30 to 60% by weight.

The e) maleimide copolymer may have, for example, a weight average molecular weight of 40,000 to 100,000 g / mol, preferably 60,000 to 80,000 g / mol, and mechanical properties of the polycarbonate resin composition of the present disclosure within this range. Excellent chemical resistance, molding processability and impact resistance.

The f) silicone impact modifiers may be made of, for example, 30 to 80% by weight of acrylate monomers, 10 to 50% by weight of methacrylate monomers, and 5 to 20% by weight of silicone monomers, within this range. Chemical and impact resistance is excellent.

The silicone monomer is not particularly limited in the case of the silicone rubber component monomer, and is one selected from the group consisting of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like. It may be more than one species.

The acrylate monomer may be, for example, an alkyl acrylate having 1 to 10 carbon atoms of an alkyl group or an aryl acrylate having 6 to 10 carbon atoms of an aryl group. Specific examples thereof include methyl acrylate, butyl acrylate and benzyl acrylate. It may be one or more selected from the group consisting of.

The methacrylate monomer may be, for example, alkyl methacrylate having 1 to 10 carbon atoms of an alkyl group or aryl methacrylate having 6 to 10 carbon atoms of an aryl group. Specific examples thereof include methyl methacrylate and butyl methacrylate. It may be at least one selected from the group consisting of latex and benzyl methacrylate and the like.

The silicone-based impact modifier may be, for example, a copolymer of a core-shell structure in which a acrylate-based monomer and a methacrylate-based monomer are graft copolymerized to a silicone-based rubber, and have excellent chemical resistance and impact resistance within this range. .

The g) nucleating agent provides a synergistic effect of improving the heat resistance without adversely affecting the chemical resistance and impact resistance when used in combination with the maleimide-based copolymer, for example 0.1 to 2% by weight based on the polycarbonate resin composition %, Or 0.2 to 1% by weight, and within this range there is an effect that the heat resistance is greatly improved without lowering the chemical resistance and impact resistance.

The g) the nucleating agent may be, for example, 1 to 10 ㎛, or 4 to 10 ㎛, or 5 to 6 ㎛ in size, to prevent the problem of deterioration in resin dispersibility due to aggregation between particles within this range In addition, the problem of reducing the efficiency of the nucleating agent and reducing the surface smoothness and surface glossiness can be solved.

The g) nucleating agent may be an organic-based nucleating agent and an inorganic-based nucleating agent, for example, preferably an inorganic-based nucleating agent.

Examples of the organic-based nucleating agent include organometallic salts such as organoaluminum salts, organocalcium salts and organosodium salts, and sorbitol-based nucleating agents as derivatives based on sorbitol, and specific examples include aluminum parabutyl benzoic acid, Sodium benzoic acid and calcium benzoic acid.

Examples of the inorganic-based nucleating agent include silica, talc, mica, mica, calcium carbonate, magnesium carbonate, calcium phosphate, calcium sulfate, barium sulfate, titanium oxide, zinc oxide, magnesium oxide, and the like.

The h) ester exchange inhibitor may be, for example, a phosphate-based ester exchange inhibitor, and has an excellent effect at low temperature impact strength, heat resistance and chemical resistance within this range.

The ester-carbonate exchange reaction can decompose the polymer because the polycarbonate resin composition of the present disclosure has both a polymer containing an ester unit and a polymer containing a carbonate unit. Therefore, it is preferable to include an inhibitor that inhibits such an ester-carbonate exchange reaction in an amount of more than 0.2 wt% to less than 0.8 wt% with respect to the polycarbonate resin composition.

The h) transesterification inhibitor may be included as an example 0.3 to 0.7% by weight, or 0.4 to 0.6% by weight, there is an excellent effect in low temperature impact strength, heat resistance and chemical resistance within this range.

The transesterification inhibitors include, for example, hydroxy aromatic compounds such as hydroxybenzophenone; Salicylate compounds such as methyl salicylate; Phosphate salts such as sodium dihydrogen phosphate, potassium dihydrogen phosphate, sodium phosphate, diphenylphosphate, and the like; and may be one or more selected from the group consisting of, preferably a phosphate salt, more preferably sodium phosphate, diphenylphosphate or It is a mixture of these, Most preferably, it is diphenyl phosphate.

The additive i) may be, for example, 0.1 to 2% by weight, or 0.2 to 1% by weight with respect to the polycarbonate resin composition of the present disclosure, and the effect of not inhibiting other physical properties while expressing a desired effect within this range. have.

The i) additive may be, for example, a thermal stabilizer, a lubricant, or a mixture thereof, and in this range, thermal stability and processability may be improved, but other physical properties may not be impaired.

The lubricant includes, for example, 0.1 to 1.0% by weight, or 0.1 to 0.5% by weight with respect to the polycarbonate resin composition of the present disclosure, and within this range, impact resistance, in particular low temperature, without affecting chemical resistance and heat resistance There is an effect of improving the impact.

The lubricant provides a synergistic effect of improving impact resistance, in particular low temperature impact resistance, without adversely affecting chemical and heat resistance when used in combination with polycarbonate-polysiloxane copolymer and maleimide-based copolymer.

The lubricant may be, for example, pentaerythritol tetrastearate and the like.

The polycarbonate resin composition may further include, for example, j) more than 0.2 wt% to less than 1.2 wt%, 0.3 to 1.1 wt%, or 0.3 to 0.8 wt% of a processing agent, within this range. Minimize screw and shear stress during injection to improve flowability.

The processing agent may be, for example, a Teflon / silicone processing agent.

The Teflon / silicone processing agent may be, for example, a mixture of Teflon resin and silicone in a base resin, and in still another example, 80 to 98 wt% of a base resin, 1 to 10 wt% of teflon resin, and 1 to 10 wt% of silicon. It may be made by, to minimize the screw and shear stress during injection within this range has the effect of improving the fluidity.

As another example, the Teflon / silicone processing agent may be made of 90 to 96% by weight of the base resin, 1 to 5% by weight of the Teflon resin and 1 to 5% by weight of the silicone, within the range of the screw and shear stress during injection Minimize the effect to improve the fluidity.

The base resin may be, for example, a polycarbonate resin.

The polycarbonate resin composition of the present disclosure may be a thermal stabilizer, lubricant, processing agent, plasticizer, coupling agent, light stabilizer, mold releasing agent, dispersant, anti-dropping agent, weather stabilizer, antioxidant, or commercialization, if necessary, within a range that does not adversely affect physical properties. At least one selected from the group consisting of a pigment, a dye, an antistatic agent, an antiwear agent, a filler, and an antibacterial agent, based on 100 parts by weight of the total polycarbonate resin composition of the present disclosure, 0.1 to 20 parts by weight, 0.1 to 10 parts by weight, or 1 To 5 parts by weight may be further included.

The antioxidant may be, for example, a phenolic, phosphite, thioether, or amine antioxidant. The release agent may be, for example, polyethylene wax, silicone oil, a metal salt of stearyl acid, and the like. For example, it may be benzophenone type, benzotriazole type or benzotriazine type.

The filler may be at least one selected from the group consisting of glass fibers, carbon fibers, silica and mica, for example, and in this case, the mechanical strength and heat resistance may be improved.

For example, the polycarbonate resin composition may have a melt index (250 ° C., 2.16 kgf) of 3.5 to 5.0 g / 10 minutes, or 3.6 to 4.4 g / 10 minutes.

For example, the polycarbonate resin composition may have a tensile strength of 530 to 580 kgf / cm ² , or 570 to 580 kgf / cm ² .

For example, the polycarbonate resin composition may have flexural strength of 770 to 830 kgf / cm ² or 820 to 827 kgf / cm ² .

For example, the polycarbonate resin composition may have a flexural modulus of 21,000 to 23,000 kgf / cm ² , or 22,800 to 22,910 kgf / cm ² .

For example, the polycarbonate resin composition may have a low temperature Izod strength of 20 kgf · cm / cm or more, or 20 to 25 kgf · cm / cm.

For example, the polycarbonate resin composition may have a heat resistance (HDT) of 110 ° C. or more, 110 to 112 ° C., or 111 to 112 ° C.

For example, the polycarbonate resin composition may have an ESCR grade B or higher.

The molded article of the present disclosure is characterized in that it is produced from the polycarbonate resin composition of the present disclosure.

The method of kneading the polycarbonate resin composition of the present disclosure is not particularly limited, but as an example, a method of melt kneading after dry blending the components of the present disclosure may be applied, and is usually 230 to 270 ° C., preferably 240 to 260 ° C. Melting and kneading may be performed so that each component has sufficient affinity both physically and chemically within the range.

Hereinafter, preferred examples are provided to help the understanding of the present disclosure, but the following examples are merely exemplified by the present disclosure, and it is obvious to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present disclosure. It is natural that such variations and modifications fall within the scope of the appended claims.

EXAMPLE

For the preparation of the polycarbonate composition of the present invention, specific specifications of each component (A to I) used in Examples 1 to 5 and Comparative Examples 1 to 10 are as follows.

Polycarbonate Resin (PC):

(1) LG polycarbonate resin with melt index of 15 g / 10 min (ASTM D1238, 300 ° C, 1.2 Kgf)

(2) LG polycarbonate resin of melt index 22 g / 10 minutes (ASTM D1238, 300 ° C, 1.2 Kgf)

Polycarbonate Polysiloxane  Copolymer (A):

(ASTM D1238, 300 ℃, 1.2 Kgf) Melt Index 10 g / 10min (Samyang Trirex-S)

Acrylonitrile-butadiene-styrene copolymer (B):

LG ABS, MA201

Polybutylene terephthalate  Resin (C):

Intrinsic viscosity [η] 0.83 ㎗ / g PBT, Changchun

Maleimide  Copolymer (D):

DENKA, MS-NB

Gum Graft  Copolymer (E):

(1) Butadiene and MMA are core-shell copolymers (Impact modifier, LG EM-500)

(2) A copolymer in which silicone / acryl and MMA form a core-shell structure (Impact modifier, Mitsubishi Rayon S2001)

Nucleating agent (F) :

Talc of size 5 ~ 6㎛

Ester exchange inhibitor (G) :

(1) Sodium Phosphate (NaH ₂ PO ₄ )

(2) diphenylphosphate (DPP, C ₁₂ H ₁₁ O ₄ P)

Processing agent (H):

Teflon / silicone processing agent (Co-polyman, PPA F33)

Additive (I):

Heat stabilizers (Basf, IR1076) and lubricants (Faci, PETS-AHS)

Example  1 to 5 and Comparative example  1 to 10

The components (A to I) were melt-kneaded under 250 ° C. conditions in a twin screw extruder according to the weight ratios of Tables 1 and 2, and then extruded to prepare a polycarbonate resin composition pellet, which was then measured using an injection molding machine. It was molded into a test specimen.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 PC (1) 46 PC (2) 46.5 46.5 46.5 46.5 46.5 46 46 A 18 18 18 18 18 18 18 18 B 5 5 5 5 5 5 5 5 C 14 14 14 14 14 15 15 15 D 9 9 9 9 9 9 9 9 E (1) 5.5 5.5 E (2) 6.0 6.0 5.3 5.8 4.8 5.5 F 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 G (1) 0.5 0.5 0.5 0.5 G (2) 0.5 0.5 0.5 0.5 H 0.7 0.2 1.2 I 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5

division Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 PC (1) 46.5 PC (2) 49.5 42.5 46.8 46.2 64.5 47.0 A 18 18 18 18 18 18 B 5 5 5 5 5 5 5 C 14 14 14 14 14 14 14 D 9 9 9 9 9 9 9 E (1) E (2) 3 10 6.0 6.0 6.0 6.0 6.0 F 0.5 0.5 0.5 0.5 0.5 0.5 0.5 G (1) 0.5 0.5 0.5 0.5 G (2) 0.2 0.8 H I 0.5 0.5 0.5 0.5 0.5 0.5 0.5

[Test Example]

The properties of the polycarbonate resin composition specimens prepared in Examples 1 to 5 and Comparative Examples 1 to 10 were measured by the following method, and the results are shown in Tables 3 and 4 below.

(1) Melt Index (MI): Measured according to ASTM D1238 (250 ° C., 2.16 kg), the unit being g / 10 min.

(2) Tensile strength: measured in accordance with ASTM D638 (sample thickness 3.2mm, 23 ℃), the unit is Kgf / cm ² .

(3) Flexural strength and flexural modulus: measured in accordance with ASTM D790 (test piece thickness 6.4mm, 23 ℃), the unit is KgF / cm ² respectively.

(4) IZOD low temperature impact strength: measured at -40 ℃ based on ASTM D256 (6.4mm thickness of the specimen, the unit is Kgf.cm / cm.

(5) Heat deflection temperature (HDT, ℃): measured according to the ASTM D648 standard.

(6) Environmental stress cracking resistance (ESCR): Appearance was observed after applying fragrance to the specimen for tensile strength measurement (thickness of 3.2 mm) in 1.0% strain jig according to ASTM D543. It was divided into (no crack) to D (break) level.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Melt index 3.6 3.9 4.3 4.0 4.4 3.0 3.6 3.7 The tensile strength 575 577 580 575 570 585 582 583 Flexural strength 820 823 827 825 820 840 837 839 Flexural modulus 22,800 22,830 22,910 22,800 22,900 22,900 22,800 22,870 Low temperature impact strength 20 20 22 20 20 22 18 18 HDT (℃) 111 111 112 111 109 111 109 110 ESCR ^{1 )} B B B B B B C B

division Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Melt index 4.0 3.1 4.2 3.8 3.0 4.6 5.2 The tensile strength 590 510 570 570 578 585 575 Flexural strength 840 750 815 820 824 830 820 Flexural modulus 23,100 19,200 22,100 22,800 22,900 23,500 22,500 Low temperature impact strength 16 25 17 20 21 17 15 HDT (℃) 113 108 109 110 111 112 108 ESCR ^{1 )} C A C B B C C

1) 2% Strain Jig, 168hrs (A: Craze Small, B: Craze Large, C: Crack, D: Severe Crack, E: Break

As shown in Tables 3 and 4, the polycarbonate resin compositions (Examples 1 to 5) of the present disclosure were excellent in fluidity, low temperature impact strength, heat resistance, and chemical resistance, which were difficult to be compatible with each other, If it deviates, the fluidity, that is, moldability is poor (Comparative Examples 1 and 8), low temperature impact strength is lowered (Comparative Examples 2 to 4, 6, 9 to 10), or heat resistance is lowered (Comparative Examples 5 and 7). I could confirm it.

Claims (23)

a) melt index (300 ° C., 1.2 kgf) 30 to 60 wt% of polycarbonate resin at 16 to 25 g / 10 min, b) 10 to 30 wt% of polycarbonate-polysiloxane copolymer, c) vinyl cyan compound-conjugated diene 1 to 15% by weight of the compound-vinylaromatic compound copolymer, d) 5% to 15% by weight of polybutylene terephthalate resin, e) 1 to 20% by weight of maleimide copolymer, f) silicone impact modifier 3 Greater than 10% by weight and less than 10% by weight, g) 0.01 to 5% by weight of nucleating agent, h) greater than 0.2 to 0.8% by weight of ester exchange inhibitor, i) 0.01 to 5% by weight of additive and j) processing agent) greater than 0.2 weight percent to less than 1.2 weight percent,
Flexural modulus is 22,800 to 22,910 kgf / cm ² characterized in that
Polycarbonate resin composition.
The method of claim 1,
The a) polycarbonate resin is a polycarbonate resin having a melt index (300 ℃, 1.2kgf) of 18 to 20 g / 10 minutes, a polycarbonate resin of 21 to 25 g / 10 minutes, or a mixture thereof
Polycarbonate resin composition. The method of claim 1,
The a) polycarbonate resin is characterized in that 40 to 50% by weight
Polycarbonate resin composition. The method of claim 1,
B) the polycarbonate-polysiloxane copolymer is characterized in that 15 to 25% by weight
Polycarbonate resin composition. The method of claim 1,
B) the polycarbonate-polysiloxane copolymer is characterized in that the melt index (300 ℃, 1.2kgf) is 5 to 20 g / 10 minutes
Polycarbonate resin composition. The method of claim 1,
C) the vinyl cyan compound-conjugated diene compound-vinylaromatic compound copolymer is characterized in that 1 to 10% by weight
Polycarbonate resin composition. The method of claim 1,
The d) polybutylene terephthalate resin is characterized in that the intrinsic viscosity is 0.5 to 1.0 dl / g
Polycarbonate resin composition. The method of claim 1,
The e) maleimide copolymer is characterized in that 5 to 15% by weight
Polycarbonate resin composition. The method of claim 1,
The f) silicone impact modifier comprises 30 to 80% by weight of the acrylate monomer, 10 to 50% by weight of the methacrylate monomer, and 5 to 20% by weight of the silicone monomer.
Polycarbonate resin composition. The method of claim 1,
G) the nucleating agent is characterized in that 0.1 to 2% by weight
Polycarbonate resin composition. The method of claim 1,
G) the nucleating agent is characterized in that the size of 1 to 10 ㎛
Polycarbonate resin composition. The method of claim 1,
H) transesterification inhibitor is characterized in that the phosphate-based transesterification inhibitor
Polycarbonate resin composition. The method of claim 1,
I) the additive is characterized in that 0.1 to 2% by weight
Polycarbonate resin composition. The method of claim 1,
The i) additive is a heat stabilizer, a lubricant or a mixture thereof
Polycarbonate resin composition. delete The method according to any one of claims 1 to 14,
The polycarbonate resin composition is characterized in that the melt index (250 ℃, 2.16kgf) is 3.5 to 5.0 g / 10 minutes
Polycarbonate resin composition. The method according to any one of claims 1 to 14,
The polycarbonate resin composition is characterized in that the tensile strength of 530 to 580 kgf / cm ²
Polycarbonate resin composition. The method according to any one of claims 1 to 14,
The polycarbonate resin composition is characterized in that the bending strength is 770 to 830 kgf / cm ²
Polycarbonate resin composition.
delete The method according to any one of claims 1 to 14,
The polycarbonate resin composition has a low temperature Izod strength of 20 kgf · cm / cm or more
Polycarbonate resin composition. The method according to any one of claims 1 to 14,
The polycarbonate resin composition is characterized in that the heat resistance (HDT) is 110 ℃ or more.
Polycarbonate resin composition. The method according to any one of claims 1 to 14,
The polycarbonate resin composition is characterized in that the ESCR is B grade or more
Polycarbonate resin composition. A polycarbonate resin composition according to any one of claims 1 to 14, characterized in that
Molded products.