KR102087405B1 - Reinforced polycarbonate resin and article made thherefrom - Google Patents

Abstract

The present disclosure relates to a reinforced polycarbonate resin and a molded article prepared therefrom, more specifically, A) more than 91% to 99.9% by weight of a polycarbonate resin; And B) 0.1 wt% or more to less than 9 wt% of unbonded fiberglass. The present invention relates to a reinforced polycarbonate resin and a molded article prepared therefrom.
According to the present disclosure, there is an effect of providing a reinforced polycarbonate resin and a molded article produced therefrom, which have a low degree of deformation as a reinforcing material, a dimension is stable, and have excellent impact strength and appearance characteristics, such as a non-reinforcing material.

Description

Reinforced polycarbonate resin and molded article made therefrom {REINFORCED POLYCARBONATE RESIN AND ARTICLE MADE THHEREFROM}

The present disclosure relates to a reinforced polycarbonate resin and a molded article manufactured therefrom. More specifically, the present disclosure relates to a reinforced polycarbonate resin having a low degree of deformation as a reinforcing material, a stable dimension, and an excellent impact strength and appearance characteristics such as an unreinforced material. It relates to a molded article manufactured from.

The polycarbonate resin is a thermoplastic resin produced by reacting bisphenol A with phosgene. The polycarbonate resin is known to be transparent because it is amorphous, has excellent heat resistance and electrical insulation, and has the highest impact strength among thermoplastic resins. In addition, polycarbonate resins are known as engineering plastics that are extremely resistant to environmental changes because they have very little dimensional change due to moisture absorption and stable physical properties even with temperature changes.

Such polycarbonate resins are widely used in housings of electronic products, but have a disadvantage in that rigidity such as deformation resistance is not sufficient to be applied to product trends that are recently being enlarged and slimmed.

In order to increase rigidity such as deformation resistance, a method of adding glass fiber as a reinforcing agent to the polycarbonate resin has been devised, but the rigidity is significantly improved by the glass fiber, but the flowability is lowered and the impact strength, which was originally excellent, is worsened. In particular, when forming a product, a glass fiber protrudes to the surface, which causes a problem of obtaining a clean appearance.

Therefore, there is an urgent need to develop a polycarbonate resin that is less deformable and stable in dimensions and has excellent impact strength and appearance characteristics that can be applied to a product trend that is becoming larger and slimmer in recent years.

Korean Patent Publication No. 2009-0052447 (published May 26, 2009)

In order to solve the problems of the prior art as described above, the present invention provides a reinforced polycarbonate resin and a molded article produced therefrom, which have a low degree of deformation as a reinforcing material and a stable dimension, and excellent impact strength and appearance characteristics, such as a non-reinforcing material. For the purpose of

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 disclosure provides A) more than 91% to 99.9% by weight of a polycarbonate resin; And B) 0.1 wt% or more to less than 9 wt% of unbonded fiberglass. Provides a reinforced polycarbonate resin and a molded article prepared therefrom.

According to the present disclosure, there is an effect of providing a reinforced polycarbonate resin having a low degree of deformation as a reinforcing material, a stable dimension, and excellent impact strength and appearance characteristics, such as a non-reinforcing material, and a molded article manufactured therefrom.

Hereinafter, the reinforcement polycarbonate resin and the molded article produced therefrom of the present disclosure will be described in detail.

The present inventors have studied steadily to improve the drawbacks of unreinforced polycarbonate materials and the appearance defects of reinforcement polycarbonate materials in accordance with recent trends in the design of larger and slimmer electronic homes, especially mobile phones. When a predetermined amount of non-bonded fiber glass is mixed with the carbonate resin, it was confirmed that the strain of the reinforced polycarbonate resin produced was low in dimensional stability and excellent in both impact strength and appearance characteristics.

Reinforcing polycarbonate resins of the present disclosure may comprise: A) greater than 91% to 99.9% by weight of polycarbonate resin; And B) 0.1 wt% or more to less than 9 wt% of non-bonded fiberglass. Within this range, the impact strength and appearance characteristics of the non-reinforced material, such as non-reinforced materials, are less strained and stable in the reinforcing material. This has an excellent effect.

As another example, the reinforcing polycarbonate resin of the present disclosure may comprise A) 94 to 99% by weight of a polycarbonate resin; And B) 1 to 6% by weight of the non-bonded fiber glass; and within this range, the deformation is low as a reinforcing material, the dimension is stable, and the impact strength and appearance characteristics are excellent, such as the non-reinforced material. have.

As another example, the reinforcing polycarbonate resin of the present disclosure may comprise A) 95 to 98 wt% of a polycarbonate resin; And B) 2 to 5% by weight of the non-bonded fiber glass; and within this range, the deformation is low as the reinforcing material, the dimension is stable, and the impact strength and appearance characteristics are excellent, such as the non-reinforced material. have.

The A) polycarbonate resin may have, for example, a number average molecular weight of 10,000 to 50,000 g / mol, 22, 000 to 33,000 g / mol or 10,000 to 16,000 g / mol, and excellent impact strength and appearance characteristics within this range. It works.

The A) polycarbonate resin may have a weight average molecular weight of 20,000 to 100,000 g / mol, 38,000 to 52,000 g / mol or 20,000 to 40,000 g / mol, for example, excellent impact strength and appearance characteristics within this range have.

The polycarbonate resin A), for example, the melt index (300 ℃, 1.2kg) is 10 to 20 g / 10 minutes, more than 15 g / 10 minutes to 20 g / 10 minutes or less, or 10 g / 10 minutes or more or 15 It may be less than g / 10 minutes, and within this range, impact strength and thermal stability are excellent.

The A) polycarbonate resin is, for example, A-1) a polycarbonate resin having a melt index (300 ° C., 1.2 kg) of 10 to 18 g / 10 minutes and A-2) a melt index (300 ° C., 1.2 kg) of 18 g It may be a mixture of polycarbonate resin that is greater than / 10 minutes to 25 g / 10 minutes or less, the impact strength and thermal stability and the like is excellent within this range.

As another example, the A) polycarbonate resin A-1) polycarbonate resin having a melt index (300 ℃, 1.2kg) of 10 to 15 g / 10 minutes and A-2) melt index (300 ℃, 1.2kg) is It may be a mixture of polycarbonate resin of 20 to 25 g / 10 minutes or less, the impact strength and thermal stability is excellent in this range.

The weight ratio (A-1: A-2) of the A-1) polycarbonate resin and the A-2) polycarbonate resin is, for example, 1: 2 to 4: 1, 1: 1 to 3: 1, or 1: It may be 1 to 2: 1, the impact strength and thermal stability and the like within this range has an excellent effect.

The A) polycarbonate resin may be, for example, a polycarbonate resin polymerized including an aromatic diol compound and a carbonate precursor.

Examples of the aromatic diol compound include 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, bisphenol A, 2,2-bis (4-hydroxyphenyl) butane, 1 , 1-bis (4-hydroxyphenyl) cyclohexane, 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 ( At least one selected from the group consisting of 4-hydroxyphenyl) 5 diphenylmethane, and alpha, omega-bis [3- (ο-hydroxyphenyl) propyl] polydimethylsiloxane Can.

The carbonate precursor is, for example, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate, diphenyl carbonate, ditoryl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis ( Diphenyl) carbonate, carbonyl chloride (phosgene), triphosgene, diphosgene, carbonyl bromide, and bishaloformate.

As another example, the polycarbonate resin A) may be a polycarbonate resin polymerized by including bisphenol A and a carbonate precursor, and within this range, impact strength and thermal stability may be excellent.

The B) non-bonded fiber glass may be, for example, B-1) fiber glass surface-treated with polyolefin, B-2) nano-crushed fiber glass, or a mixture thereof, and have low deformation and stable dimensions within this range. Further, there is an effect having the same characteristics as that of the non-reinforced material, that is, excellent appearance characteristics and impact strength.

Fiber glass surface-treated with polyolefin (B-1) as an example? It may be strand fiber glass, and within this range is less strain and stable in dimension, and further has the same properties as the non-reinforced material, that is, excellent appearance characteristics and impact strength.

The fiberglass surface-treated with the polyolefin B-1 may be, for example, an average diameter of 12 to 15 μm, or 13 to 14 μm, and an average length of 2 to 5 nm, or 3 to 4 nm, within this range. Less deformation and stable dimension, and further has the same properties as non-reinforced material, that is, excellent appearance characteristics and impact strength.

The fiberglass surface-treated with the polyolefin B-1 may include, for example, 70 to 99.9% by weight of the glass component and 0.1 to 30% by weight of the polyolefin, and have a low degree of deformation and stable dimensions within this range. The same properties as the reinforcing material, that is, the effect having excellent appearance properties and impact strength.

The polyolefin is, for example, polyethylene, and in this case, the degree of deformation is low, the dimension is stable, and furthermore, there is an effect of having the same characteristics as that of the non-reinforced material, that is, excellent appearance characteristics and impact strength.

The B-2) nano-crushed fiber glass is an average diameter of 12 to 15 ㎛, or 13 to 14 ㎛, the average length may be 30 to 200 ㎛, or 50 to 150 ㎛, within this range It is small in size and stable, and furthermore, it has the same properties as non-reinforced material, that is, excellent appearance characteristics and impact strength.

The nano-crushed fiber glass may be manufactured by grinding the fiber glass by dry or wet milling using, for example, a ball mill, a vibrating ball mill, a rod mill, a pin mill, a disk mill, a bead mill, or a hammer mill.

The B-2) nano crushed fiber glass may be, for example, a non-coated fiber glass that is not surface treated, in which case the degree of deformation is low and the dimension is stable, and further, the same characteristics as that of the non-reinforced material, that is, excellent appearance and impact strength It has a good economic efficiency.

In the present description, the non-bonded fiber glass means a fiber glass in which voids exist between the material used for the surface treatment and the fiber glass, or the material used for the surface treatment is not bonded.

The reinforcing polycarbonate resin may include, for example, C) impact modifier, in which case the molding processability is maintained while the impact strength is greatly improved.

The impact modifier C) may be included, for example, in an amount of 0.1 to 10% by weight, 1 to 10% by weight, or 3 to 8% by weight with respect to the reinforced polycarbonate resin. There is an effect to be improved.

The impact modifier C) may be, for example, a silicone-based impact modifier, and has an effect of greatly improving impact strength while maintaining moldability within this range.

The silicone-based impact modifier may include, for example, 30 to 80% by weight of an acrylate monomer, 5 to 50% by weight of a methacrylate monomer, and 5 to 50% by weight of a silicone monomer. Molding workability and impact strength is excellent.

As another example, the silicone impact modifier may include 50 to 70 wt% of an acrylate monomer, 5 to 20 wt% of a methacrylate monomer, and 25 to 45 wt% of a silicone monomer, within this range. Chemical, molding processability and impact strength is excellent.

The silicone monomers are not particularly limited in the case of the silicone rubber component monomers, and for example, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trimethyltriphenylcyclotrisiloxane It may be at least one selected from the group consisting of, tetramethyltetraphenylcyclotetrasiloxane, octaphenylcyclotetrasiloxane and the like.

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 silicone-acrylic impact modifier of a core-shell structure, and has excellent effects of chemical resistance, thermal stability, molding processability, and impact strength within this range.

As another example, the silicone-based impact modifier may be a core-shell copolymer in which acrylate-based monomers and methacrylate-based monomers are graft copolymerized to silicone-based rubber, and have chemical resistance, moldability, and impact strength within this range. Has an excellent effect.

The core-shell silicone impact modifier includes, for example, 30 to 80 wt% of an acrylate monomer, 5 to 50 wt% of a methacrylate monomer, and 5 to 50 wt% of a silicone rubber. It may be, within this range is excellent in chemical resistance, molding processability and impact strength.

As another example, the silicone impact modifier may be a graft copolymerized graft copolymer including 50 to 70 wt% of an acrylate monomer, 5 to 20 wt% of a methacrylate monomer, and 25 to 45 wt% of a silicone rubber. In this range, the chemical resistance, molding processability and impact strength is excellent.

For example, the reinforcement polycarbonate resin may have a melt index (300 ° C., 1.2 kgf) of 10 to 15 g / 10 minutes, or 10 to 13 g / 10 minutes, and have an excellent balance of physical properties within this range.

The reinforced polycarbonate resin may have, for example, an impact strength (ASTM D256, 1/8 ″) of 20 kgf · cm / cm or more (20 to 60 kgf · cm / cm or 25 to 50 kgf · cm / cm). Within this range, the balance of physical properties is excellent.

The reinforcing polycarbonate resin of the present substrate is a heat stabilizer, a lubricant, a processing agent, a plasticizer, a coupling agent, a light stabilizer, a mold release agent, a dispersant, an antidropping agent, a weather stabilizer, an antioxidant, and a commercialization as necessary within a range that does not adversely affect physical properties. 0.01 to 20 parts by weight, 0.01 to 20 parts by weight of at least one selected from the group consisting of pigments, dyes, antistatic agents, antiwear agents, fillers, flame retardants and antibacterial agents, based on 100 parts by weight of the reinforcing polycarbonate resin (A + B + C) To 5 parts by weight, or 0.1 to 2 parts by weight may be further included.

The antioxidant may be, for example, a mixture of a primary antioxidant and a secondary antioxidant, the primary antioxidant may be a phenolic antioxidant, in particular IR1076, the secondary antioxidant is a phosphorus antioxidant, specific For example, it may be PEP36, and may be included in an amount of 0 to 0.5 parts by weight, or 0.01 to 0.3 parts by weight, based on 100 parts by weight of the total reinforced polycarbonate resin.

The lubricant may be, for example, an ester lubricant, and in detail, may be pentaerythritol ester or PETS-AHS, and may be 0 to 1 part by weight, or 0.01 to 0.01 to 100 parts by weight of the total of the reinforced polycarbonate resin. 0.6 parts by weight may be included.

The method for producing the reinforced polycarbonate resin of the present disclosure is, for example, dry blending A) greater than 91% to 99.9% by weight of polycarbonate resin, and B) 0.1% to 9% by weight of unbonded fiberglass. After the melt kneading may comprise the step of extruding.

The method of manufacturing the reinforced polycarbonate resin may include, for example, injection molding the extruded reinforced polycarbonate resin.

For example, the molten kneading can be carried out in the range of 260 to 300 ℃, preferably 280 to 300 ℃, within this range has a high physical and chemical affinity between the components has an excellent balance of physical properties.

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

The molded article may be, for example, an injection molded article, and in a specific example, may be a mobile phone housing. In this case, the physical properties of the reinforcement polycarbonate resin of the present disclosure coincide with the properties required for the recent mobile phone housing.

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

EXAMPLE

For the preparation of the reinforced polycarbonate resin of the present disclosure, specific specifications of each component (A-1 to C) used in Examples 1 to 6 and Comparative Examples 1 to 4 are as follows.

<(A) Bisphenol A polycarbonate resin (PC)>

Bisphenol having 27,000 <Mn <33,000 and 48,000 <Mw <52,000 and melt index (ASTM D1238, 300 ℃, 1.2kg load) measured by GPC method as PC standard, respectively 27,000 <Mn <33,000 and 48,000 <Mw <52,000 A polycarbonate resin ((A) -1), number average molecular weight and weight average molecular weight of 22,000 <Mn <27,000 and 38,000 <Mw <42,000, respectively, and melt index (ASTM D1238, 300 ° C, 1.2kg load) was 22g Bisphenol A polycarbonate resin ((A) -2) of / 10 min was used, respectively.

The (A) -1 bisphenol A polycarbonate resin has been produced by, for example, the following method.

1784 g of water, 385 g of NaOH, and 232 g of BPA (bisphenol A) were added to the polymerization reactor, and the mixture was dissolved under N 2 atmosphere. Then, 128 g of TPG (triphosgene) was dissolved in MC for 1 hour while maintaining the pH at 11 or more, followed by reaction for 10 hours, and 46 g of TEA (triethylamine) was added thereto for a coupling reaction. After 1 hour and 20 minutes of total reaction time, the pH was lowered to 4 to remove TEA, and washed three times with distilled water to adjust the pH of the produced polymer to 6-7 neutral. The polymer thus obtained was obtained by reprecipitation in a methanol and hexane mixed solution, which was then dried at 120 ° C. to give a final polycarbonate resin (Mw = 31000; MI = 10 g / 10 min under a temperature of 300 ° C. and a load of 1.2 kg). Got.

Said (A) -2 bisphenol A polycarbonate resin was manufactured by the following method as an example.

1784 g of water, 385 g of NaOH, and 232 g of BPA (bisphenol A) were added to the polymerization reactor, and the mixture was dissolved under N 2 atmosphere. Then, 128 g of TPG (triphosgene) was dissolved in MC for 1 hour while maintaining the pH at 11 or more, followed by reaction for 10 hours, and 46 g of TEA (triethylamine) was added thereto for a coupling reaction. After 1 hour and 20 minutes of total reaction time, the pH was lowered to 4 to remove TEA, and washed three times with distilled water to adjust the pH of the produced polymer to 6-7 neutral. The polymer thus obtained was obtained by reprecipitation in a methanol and hexane mixed solution, which was then dried at 120 ° C. to give a final polycarbonate resin (Mw = 26000; MI = 22 g / 10 min at a temperature of 300 ° C. and a load of 1.2 kg). Got.

<(B) -1 Unbound Fiber  Glass>

Chopped Strand for Polyethylene and Low Glass Content (G / F 415A, Manufacturer: Owens Corning) with an average diameter of 13 μm and an average length of 3-4 mm

<(B) -2 nano grinding Fiber  Glass>

Uncoated fiberglass MF-100, manufactured by Sungjin Fiber, which is crushed to a nano size with an average diameter of 13 μm and an average length of 50 μm

<(B) -3 binding Fiber  Glass>

Coating material epoxy silane, Chopped Strand for Polyester (G / F 183F, manufactured by Owens Corning) with an average diameter of 13 μm and an average length of 3-4 mm

<(c) core-shell structure Impact modifier >

Methyl methacrylate-acrylate-dimethyl siloxane copolymer (Methyl methacrylate 10), a silicone-acrylic impact modifier with a silicone-acrylic rubber (graft polymer in which an acrylic monomer is graft-polymerized to silicone rubber) forming a core-shell structure wt%, Butyl acrylate 60 wt%, Dimethylsiloxane 30 wt%) (S2100, MRC).

Example  1 to 6 and Comparative example  1 to 4

The components (A to C) were melt-kneaded in a twin screw extruder under the conditions of 280 ~ 300 ℃ according to the weight ratio of the following Table 1 and extruded to prepare a polycarbonate resin composition pellet, and measured again using an injection molding machine It was molded into a test specimen.

 [Test Example]

The properties of the reinforced polycarbonate resin specimens prepared in Examples 1 to 6 and Comparative Examples 1 to 4 were measured by the following method, and the results are shown in Table 1 below.

(1) Melt Index (MI): Measured according to ASTM D1238 (300 ° C, 1.2 kg), the unit is g / 10 min.

(2) IZOD impact strength: measured in accordance with ASTM D256 (test piece thickness 6.4mm, 23 ℃), the unit is Kgf.cm / cm.

(3) Warpage: It is indicated as 1 when there is almost no deformation, 2 when there is little deformation, 3 when deformation, and 4 when deformation is large.

(4) Surface characteristics: Measured with the naked eye, it is marked as 1 for excellent, 2 for excellent, 3 for normal and 4 for poor.

Example Comparative example One 2 3 4 5 6 One 2 3 4 A-1 (PC 10) 60 60 60 60 60 60 60 60 60 60 A-2 (PC 22) 35 30 35 30 32 27 35 35 32 25 B-1 (G / F 415A) 5 5 8 8 B-2 (milled fiber) 5 5 B-3 (G / F 183F) 5 5 8 15 C (impact enhancer) 5 5 5 5 (Properties) Melt Index (g / 10min) 12 10 12 11 14 12 12 9 14 10 1/8 ”impact strength (kgcm / cm) 30 48 35 50 25 28 15 25 10 9 Warpage 3 3 3 3 2 2 3 3 2 One Surface characteristics 2 2 One One 3 3 2 2 3 4

As shown in Table 1, the reinforcement polycarbonate resin (Examples 1 to 6) of the present substrate was found to have a low degree of deformation and excellent surface properties, but also excellent molding processability and impact strength. In particular, in the case of Examples 3 and 4, including the milled fiber glass, it was confirmed that the appearance is much better without deteriorating the Warpage characteristics.

However, in the case of not including the non-bonded fiber glass according to the present invention (Comparative Examples 1 and 4), it was confirmed that the surface characteristics, moldability or impact strength were significantly poor. In particular, in the case of Comparative Example 4 containing an excessive amount of fiber glass it was confirmed that the surface properties are significantly reduced.

Claims (18)

A) 92% to 95% by weight of polycarbonate resin and B) 0.1% to 5% by weight of unbonded fiber glass, wherein A) polycarbonate resin A-1) melt index (300 ℃, 1.2kg) A polycarbonate resin having a 10 to 18 g / 10 min, and A-2) a melt index (300 ° C., 1.2 kg) of a polycarbonate resin having more than 18 g / 10 min to 25 g / 10 min,
B) the non-bonded fiber glass is B-2) nano crushed fiber glass, the B-2) nano crushed fiber glass is characterized in that the average length is 30 to 200 ㎛
Reinforced Polycarbonate Resin.
delete delete The method of claim 1,
The weight ratio (A-1: A-2) of the A-1) polycarbonate resin and the A-2) polycarbonate resin is 1: 2 to 4: 1, characterized in that
Reinforced Polycarbonate Resin.
The method of claim 1,
The A) polycarbonate resin is bisphenol A polycarbonate resin, characterized in that
Reinforced Polycarbonate Resin.
delete delete delete The method of claim 1,
The B-2) nano crushed fiber glass has an average diameter of 12 to 15 ㎛
Reinforced Polycarbonate Resin.
The method of claim 1,
The B-2) nano crushed fiber glass is a non-coated fiber glass which is not surface treated
Reinforced Polycarbonate Resin.
The method of claim 1,
The reinforced polycarbonate resin is characterized in that it comprises an impact modifier.
Reinforced Polycarbonate Resin.
The method of claim 11,
The impact modifier is characterized in that it comprises 0.1 to 5% by weight relative to the reinforced polycarbonate resin
Reinforced Polycarbonate Resin.
The method of claim 11,
The impact modifier is a silicone-based impact modifier, characterized in that
Reinforced Polycarbonate Resin.
The method of claim 13,
The silicone-based impact modifier is a silicone-acrylic impact modifier of the core-shell structure
Reinforced Polycarbonate Resin.
The method according to any one of claims 1, 4, 5 and 9 to 14,
The reinforcement polycarbonate resin is characterized in that the melt index (300 ℃, 1.2kgf) is 10 to 15 g / 10 minutes
Reinforced Polycarbonate Resin.
The method according to any one of claims 1, 4, 5 and 9 to 14,
The reinforced polycarbonate resin is characterized in that the impact strength (ASTM D256, 1/8 ") is more than 20 kgfcm / cm
Reinforced Polycarbonate Resin.
Claim 1, 4, 5 and 9 to 14 characterized in that it is made from the reinforced polycarbonate resin of any one of claims
Molded products.
The method of claim 17,
The molded article is characterized in that the mobile phone housing
Molded products.