JPH10324798A - Flame retardant aromatic polycarbonate composition excellent in blow moldability and molding of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flame retardant aromatic polycarbonate composition excellent in blow moldability, capable of giving moldings having excellent appearance, mechanical properties such as impact strength resistance, etc., and drawndown properties by formulating a specific wollastonite, wax and flame retardant. SOLUTION: This composition is formulated with (A) 100 pts.wt. of the polycarbonate composition comprising (i) 98-70 wt.% of an aromatic polycarbonate resin having 10000-40000 of viscosity average molecular weight and (ii) 2-30 wt.% of an ultra-high molecular weight aromatic polycarbonate having 70000-200000 of viscosity average molecular weight, (B) 1-100 pts. of the wollastonite having 3-50 of aspect ratio L/D, (C) 0.02-5 pts. of an olefin based wax having carboxyl group and/or carboxylic acid anhydride group, (D) 0.5-30 pts. of the flame retardant (for example, a brominated bisphenol polycarbonate resin), (E) 0-2 pts. of an assistant flame retardant. Preferably, the component (D) is a phosphorus flame retardant and the component (E) is polytetrafluoroethylene having fibril forming capability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flame-retardant aromatic polycarbonate resin composition having excellent blow moldability.
More specifically, it has a good surface appearance when formed into a molded product, has excellent mechanical properties such as impact strength and rigidity, and has excellent drawdown characteristics, and is reinforced with a filler that passes 5 VA in a UL94 5V test. The present invention relates to a flame-retardant aromatic polycarbonate resin composition having excellent blow moldability.

[0002]

2. Description of the Related Art Conventionally, since aromatic polycarbonate resins have excellent performance in transparency, heat resistance and impact resistance, they are often melt-molded by injection molding, compression molding, extrusion molding, blow molding and the like. Used for applications.

[0003] In particular, in recent years, the extrusion blow molding method has attracted attention as a method for obtaining large molded products at low cost. In order to obtain a large molded product having a uniform thickness by the extrusion blow molding method, the material is required to have a small drawdown due to its own weight and a small swell at the die exit.

However, since the aromatic polycarbonate resin has a large drawdown due to its own weight at the time of melting, it is difficult to obtain a uniform thick molded product by blow molding, and it is particularly difficult to mold a large molded product.

In the blow molding application, unlike the injection molding field, blow characteristics at the time of molding are separately required. With respect to the polycarbonate resin composition, a technique for improving the blow characteristics by blending an ultrahigh molecular weight polycarbonate resin has been disclosed (Japanese Patent Laid-Open No. 4-2537566). Such a composition is utilized as a thick blow-molded article. Japanese Patent Application Laid-Open No. 9-12847 discloses a resin composition having good solvent resistance and surface appearance and useful for injection molding and the like, and is applied to door handles and the like of automobiles. However, such a resin composition has not been able to sufficiently satisfy the required characteristics of a thin-wall blow molded article required in recent years.

Further, since aromatic polycarbonate resin has low rigidity as compared with glass, metal, etc., in applications requiring high rigidity, a method of blending an appropriate filler such as glass fiber (Japanese Patent Publication No. -11702
No., JP-A-6-128474). Aromatic polycarbonate resin compositions reinforced with fibrous fillers such as glass fibers are made of materials with excellent mechanical properties such as stiffness, as well as drawdown properties, by blending fibrous fillers such as glass fibers. Are used in various industrial fields as blow molding applications.

However, when an aromatic polycarbonate resin composition reinforced with a fibrous filler such as glass fiber or carbon fiber is blow-molded at a normal mold temperature (100 ° C. or lower), the appearance of the molded product is glass fiber, Fibrous filler such as carbon fiber floats on the surface and becomes a Japanese paper pattern,
For example, when used for automobile parts, OA equipment, and the like that require a good appearance, there is a disadvantage that the coating film must be very thick. Also, by performing blow molding at a very high mold temperature (120 ° C. to 150 ° C.), it is possible to obtain a molded product having a good appearance to some extent, but the molding cycle becomes longer and productivity is remarkably increased. There is a problem that it decreases.

On the other hand, in recent years, there has been an increasing demand for flame-retardant resin materials used mainly for applications such as OA equipment and home electric appliances. Various attempts have been made to improve the flame retardancy of the resin composition, and the resin composition exhibits excellent flammability in the V test of the UL94 flammability test. However, these resin compositions did not show a square plate (150
If the thickness of (.times.150 mm) is less than 2.5 mm, a hole will be formed and the sample will fail 5VA.

Therefore, it is excellent in mechanical properties such as surface appearance, impact strength, rigidity and the like, and drawdown properties.
There has been a demand for a flame-retardant aromatic polycarbonate resin composition reinforced with a filler that passes 5 VA in the 5V test of the above.

[0010]

DISCLOSURE OF THE INVENTION The present invention provides a molded article having good surface appearance, mechanical properties such as impact strength and rigidity, and the like.
Excellent flame-retardant properties, such as excellent draw-down characteristics, and even passing through the UL94 5V test in a 5V test even when molded into a thinner shape. An object is to provide an aromatic polycarbonate resin composition.

The present inventors have conducted intensive studies to achieve the above object, and as a result, found that the viscosity average molecular weight was 10,000 to 4
Specific wollastonite and a carboxyl group and / or a carboxyl group in an aromatic polycarbonate resin composition comprising an aromatic polycarbonate resin having a molecular weight of 000 and an ultrahigh molecular weight aromatic polycarbonate resin having a viscosity average molecular weight of 70,000 to 200,000. Blow moldability, flame retardancy, and mechanical properties by blending an olefin wax containing an acid anhydride group and a flame retardant, especially by combining a specific flame retardant or flame retardant composition with an ultra-high molecular weight polycarbonate resin And reached the present invention.

[0012]

The present invention relates to an aromatic polycarbonate resin having a viscosity average molecular weight of 10,000 to 40,000 (component A) of 98 to 70% by weight and a viscosity average molecular weight of 70,000 to 200,000. Wollastonite (component (C)) having an aspect ratio L / D = 3 to 50 with respect to 100 parts by weight of an aromatic polycarbonate resin composition comprising 2 to 30% by weight of a high molecular weight aromatic polycarbonate resin (component (B)) Parts by weight, 0.02 to 5 parts by weight of an olefin wax containing a carboxyl group and / or a carboxylic anhydride group (D component), and 0. 0 parts by weight of a flame retardant (E component).
The present invention relates to a flame-retardant aromatic polycarbonate resin composition having excellent blow moldability, comprising 5 to 30 parts by weight, and a molded article comprising the same.

The aromatic polycarbonate resin (component A) used in the present invention is produced by reacting a dihydric phenol with a carbonate precursor. As the dihydric phenol used here, 2,2-bis (4-hydroxyphenyl) propane [commonly known as bisphenol A] is intended, but a part or all of the dihydric phenol may be replaced with another dihydric phenol. Other dihydric phenols include, for example, bis (4
-Hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3) -Methylphenyl) propane,
Bis (4-hydroxyphenyl) sulfone and the like can be mentioned.

Examples of the carbonate precursor include carbonyl halide, carbonyl ester and haloformate, and specific examples thereof include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and a mixture thereof. In producing the aromatic polycarbonate resin, the above-mentioned dihydric phenols can be used alone or in combination of two or more. Further, two or more kinds of the obtained aromatic polycarbonate resins may be mixed and used.

The molecular weight of the aromatic polycarbonate resin (component (A)) is generally represented by a viscosity average molecular weight of 10,000.
~ 40,000, preferably 15,000 ~ 30,000
0. The viscosity average molecular weight (M) in the present invention is as follows.
The specific viscosity (η _SP ) obtained from the solution dissolved at ° C. was obtained by inserting it into the following equation. η _SP /C=[η]+0.45×[η] ² C [η] = 1.23 × 10 ^-4 M ^0.83 (where [η] is the intrinsic viscosity and C is the polymer concentration at 0.7 is there.)

In producing the aromatic polycarbonate resin having such a molecular weight, a suitable molecular weight regulator, a catalyst for accelerating the reaction and the like may be used.

When an aromatic polycarbonate resin having a viscosity-average molecular weight of less than 10,000 is used as the component A, the blow-molded product becomes nonuniform when blown, resulting in a blow-molded product having a large uneven thickness. In addition, the viscosity average molecular weight is 40,
If the amount exceeds 000, the melt viscosity increases excessively, and it becomes difficult to form a parison.

The ultra-high molecular weight aromatic polycarbonate resin (component B) used in the present invention can take any of the components described above for the aromatic polycarbonate resin (component A). ) Are preferred. The polymerization degree of the ultra-high molecular weight aromatic polycarbonate resin (component B) is such that the viscosity average molecular weight of 70,000 to 200,
000, preferably 100,000 to 160,000. When a material having a viscosity average molecular weight of less than 70,000 is used, the compounding amount must be increased in order to prevent drawdown. As a result, the melt viscosity increases excessively, and it becomes difficult to form a parison. If the viscosity average molecular weight exceeds 200,000, the dispersion at the time of mixing is poor, and the appearance of the blow molded product is poor.

The wollastonite (component C) used in the present invention is a natural white mineral (calcium metasilicate) having acicular crystals, represented by the chemical formula CaSiO ₃ , usually 50% by weight of SiO _{2 and} 47% by weight of CaO. %, Other Fe ₂ O ₃ , Al ₂ O _3, etc., and the specific gravity is about 2.
9 In the present invention, the wollastonite needs to have an aspect ratio L / D = 3 to 50, preferably 5 to 50. In the present invention, the aspect ratio L / D
“Wollastonite” is a value obtained by taking a scanning electron micrograph of wollastonite and expressed by a ratio of an average fiber length (L) and an average fiber diameter (D) of 100 wollastonite fibers in the photograph. .

The wollastonite may be used after surface treatment with a usual surface treatment agent, for example, a coupling agent such as a silane coupling agent or a titanate coupling agent. Aspect ratio is 3
If the ratio is less than 50, the reinforcing effect is insufficient, and the chemical resistance and the fatigue properties are deteriorated. If the aspect ratio exceeds 50, the appearance of the obtained molded product is unfavorably deteriorated. The wollastonite is a normal surface treatment agent,
For example, a material that has been surface-treated with a coupling agent such as a silane coupling agent or a titanate coupling agent may be used.

The olefin wax containing a carboxyl group and / or a carboxylic anhydride group (component D) used in the present invention is a carboxyl group and / or a carboxylic anhydride obtained by specially treating an olefin wax. It is a wax with a group. It is considered that the addition of the wax reduces the destruction of the inorganic filler due to shearing during the molding process, and exhibits an effect of maintaining the original aspect ratio.

The carboxyl group and the carboxylic anhydride group may be bonded to any part of the olefin wax, and the concentration thereof is not particularly limited, but 0.1 to 6 meq / g per gram of the olefin wax. Is preferable. If it is less than 0.1 meq / g, the effect of improving rigidity and impact resistance becomes insufficient, and if it is more than 6 meq / g, the thermal stability of the olefin wax itself deteriorates, which is not preferable. Commercially available olefin waxes include, for example, Diacarna-PA30 (trade name, manufactured by Mitsubishi Kasei Co., Ltd.), 22 of high wax acid treatment type.
03A and 1105A (manufactured by Mitsui Petrochemical Co., Ltd .: trade name), oxidized paraffin (manufactured by Nippon Seiro Co., Ltd.) and the like are used alone or as a mixture of two or more.

The flame retardant (component E) used in the present invention is a halogen-based or phosphorus-based flame retardant generally used for a thermoplastic resin composition, and is preferably a halogen-based flame retardant. Examples of the halogen-based flame retardant include aromatic halogen compounds, halogenated epoxy resins, halogenated polycarbonate resins, halogenated aromatic vinyl polymers, halogenated cyanurate resins, halogenated polyphenyl ethers, halogenated polyphenylthioethers, and the like. Preferably, decabromodiphenyl oxide, brominated bisphenol-based epoxy resin, brominated bisphenol-based phenoxy resin, halogenated polycarbonate resin, brominated polystyrene resin, brominated cross-linked polystyrene resin, brominated bisphenol cyanurate resin, brominated polyphenylene oxide , Polydibromophenylene oxide, decabromodiphenyl oxide bisphenol condensates (tetrabromobisphenol A, oligomers thereof, etc.) Gera, more preferably a halogenated polycarbonate resin, most preferably,
It can be a brominated bisphenol-based polycarbonate resin. Examples of the phosphorus-based flame retardants include non-halogen phosphates such as trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxycotyl phosphate, triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, and octyl diphenyl phosphate. , Tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, bis (2,3-dibromopropyl) -2,3-dichloropropylphosphate, tris (2,3-dibromopropyl) phosphate, bis (chloropropyl) monooctyl Halogen-containing phosphate esters such as phosphates and the like can be mentioned. In order to sufficiently exhibit the flame retardancy of the phosphorus-based flame retardant, it is preferable to use the phosphorus-based flame retardant in combination with the following flame retardant auxiliary (component G).

The flame-retardant aromatic polycarbonate resin composition having excellent blow moldability of the present invention, when the total of the component A and the component B is 100% by weight, is preferably from 98 to 98%. 70% by weight, preferably 96
To 75% by weight, 2 to 30% by weight, preferably 4 to 25% by weight of the ultrahigh molecular weight aromatic polycarbonate resin (component B)
1 to 100 parts by weight, preferably 5 to 7 parts, of wollastonite (component C) having an aspect ratio L / D of 3 to 50, based on 100 parts by weight of an aromatic polycarbonate resin composition comprising
0 parts by weight, more preferably 10 to 40 parts by weight, and 0.02 to 5 parts by weight, preferably 0.05 to 3 parts by weight of an olefin wax (component D) containing a carboxyl group and / or a carboxylic anhydride group. Part, flame retardant (E component) 0.5 ~
30 parts by weight, preferably 1 to 20 parts by weight, are blended.

If the blending ratio of the ultrahigh molecular weight aromatic polycarbonate resin (component B) is less than 2% by weight, the drawdown characteristics are not sufficiently improved, and if it exceeds 30% by weight, the melt viscosity increases and molding becomes difficult. .

When the mixing ratio of wollastonite (component C) having an aspect ratio L / D = 3 to 50 is less than 1 part by weight, the reinforcing effect is small and rigidity is insufficient. The appearance of the product deteriorates, which is not preferable.

When the compounding ratio of the olefin wax containing a carboxyl group and / or a carboxylic anhydride group (component D) is less than 0.02 parts by weight, the effect of improving rigidity and impact resistance is small, and if it exceeds 5 parts by weight. The appearance and the mechanical strength are undesirably reduced.

If the compounding ratio of the flame retardant (component E) is less than 0.5 part by weight, it is difficult to obtain a sufficient flame retarding effect, and if it exceeds 30 parts by weight, the thermal stability at the time of molding will be reduced.

In the present invention, A component, B component, C component,
Although it is possible to obtain the desired resin composition with the resin composition comprising the D component and the E component, in order to further improve the impact resistance, particularly, the impact resistance in a low-temperature atmosphere,
In order to increase the effect of the flame retardancy of the rubbery polymer (F component), a flame retardant auxiliary (G component) can be blended.

Examples of the rubbery polymer (F component) include a diene-based elastic polymer such as a butadiene-alkyl (meth) acrylate-styrene copolymer and a butadiene-alkyl acrylate-alkyl (meth) acrylate copolymer. Acrylic elastic polymers, composite elastic polymers having a structure in which a polyorganosiloxane rubber and a polyalkyl (meth) acrylate rubber component are intertwined with each other, and olefin copolymers. Alternatively, two or more kinds can be used in combination.
Further, the olefin-based copolymer is obtained by polymerizing ethylene and / or an α-olefin having 3 or more carbon atoms with an unsaturated carboxylic acid ester. Examples of the α-olefin having 3 or more carbon atoms constituting the olefin-based copolymer include propylene, butene-1, and hexene-.
1, decene-1, 4-methylbutene-1, 4-methylpentene-1 and the like, but propylene or butene-
1 is preferred. The unsaturated carboxylic acid ester is an unsaturated carboxylic acid having 3 to 8 carbon atoms, for example, an alkyl ester such as acrylic acid and methacrylic acid. Specific examples thereof include methyl acrylate, ethyl acrylate,
N-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-methacrylate
Examples thereof include butyl and isobutyl methacrylate, and ethyl acrylate or methyl methacrylate is preferred. As the olefin-based copolymer, it is preferable to use ethylene and / or α-olefin having 3 or more carbon atoms copolymerized in a range of 50 to 99% by weight and an unsaturated carboxylic acid ester in a range of 1 to 50% by weight.

The compounding ratio of the rubbery polymer (F component) is preferably in the range of 1 to 20 parts by weight based on 100 parts by weight of the resin composition according to the first aspect. If the amount is less than 1 part by weight, the effect of improving the impact is insufficient, and if it exceeds 20 parts by weight, heat resistance and rigidity are reduced.

Examples of the flame retardant auxiliary (component G) include a molybdenum compound, an antimony compound and the like. Of these, particularly preferred are sodium antimonate and antimony trioxide. It is also possible to use polytetrafluoroethylene having a fibril-forming ability in order to further improve the flame retardancy. Polytetrafluoroethylene having a fibril-forming ability is classified into Type III in the ASTM standard. Polytetrafluoroethylene having a fibril-forming ability has a drip-preventing performance at the time of a combustion test of a test piece in a vertical burning test of UL standard, and polytetrafluoroethylene having such a fibril-forming ability is more flame-retardant. It gives an effect. Polytetrafluoroethylene having such fibril-forming ability,
For example, it is commercially available as Teflon 6J from Mitsui-DuPont Fluorochemicals Co., Ltd. or as Polyflon from Daikin Industries, Ltd. and can be easily obtained. The compounding amount of the polytetrafluoroethylene having the fibril-forming ability is a flame-retardant aromatic polycarbonate resin composition composed of five components A to E, or a flame-retardant aromatic polycarbonate resin composed of six components A to F. Usually 0.1 to 1 to 100 parts by weight of the polycarbonate resin composition
Parts by weight. If the amount is less than 0.1 part by weight, it is difficult to obtain sufficient performance to prevent melt dripping, and if it exceeds 1 part by weight, the appearance is deteriorated.

The flame retardant aromatic polycarbonate resin composition comprising the components A to E of the present invention further comprises components F to G
In addition to the components, a nucleating agent (eg, sodium stearate, ethylene-sodium acrylate, etc.), a stabilizer (eg, phosphate ester, phosphite ester, etc.), antioxidant, as long as the object of the present invention is not impaired. Agents (eg, hindered phenol compounds), light stabilizers, colorants, foaming agents, lubricants, release agents, antistatic agents, and the like.
Further, a small amount of another thermoplastic resin (for example, a thermoplastic graft copolymer obtained by grafting a vinyl cyanide compound and an aromatic vinyl compound to a diene rubber component, a thermoplastic aromatic polyester resin, or the like) may be added.

The resin composition of the present invention can be uniformly mixed with a V-type blender, a ribbon mixer, a tumbler or the like, and then melt-kneaded with an ordinary extruder or the like to form pellets. Alternatively, any of the optional components may be mixed in advance, and then the remaining components may be mixed and melt-kneaded by a usual extruder or the like to form pellets. The resin composition thus obtained can be easily molded by any method such as extrusion molding, thermoforming, vacuum molding, injection molding and gas assist molding, in addition to blow molding and injection blow molding.

[0035]

The present invention will be described in more detail with reference to the following examples. The evaluation was based on the following method.

(1) Surface Appearance A part of a box-shaped blow-molded product was cut out and coated with R-230 Dover White manufactured by Nippon Bee Chemical Co., Ltd.
After drying for 1 hour at ℃ ℃, a universal surface profiler (SURF
COM 3B. E-MD-S10A: Tokyo Seimitsu Co., Ltd.
The average surface roughness (Ra) was measured under the conditions of a stylus diameter of 2 μm and a stylus pressure of 0.07 g. The coating thickness is 30μ
m.

(2) Impact Strength The impact with an Izod notch (thickness: 3.2 mm) was measured according to ASTM D256.

(3) Rigidity In accordance with ASTM D790, a bending test was performed to measure a flexural modulus.

(4) Drawdown (hereinafter referred to as DD) The parison extruded from the die of the blow molding machine is placed under the die.
The weight at the time of reaching an arbitrary length is measured, and as shown in FIG. 1, a curve OP is created by taking the parison length on the horizontal axis and the parison weight on the vertical axis, and draw a tangent OB to the curve at the origin. , The weight corresponding to the parison length Li is Wpi, and the weight at the intersection with the tangent OB corresponding to the parison length Li is WBi. DD (%) = {(WBi−WPi) / WBi} × 100 It is preferable that the drawdown property is small.

(5) Flammability test UL94 / V A combustion test was conducted in accordance with UL Standard 94-V. The thickness of the test piece was 1/16 inch. UL94 / 5V test A combustion test was performed according to UL standard 94-5V. In addition,
The thickness of the test piece was 2.5 mm.

[Examples 1 to 6 and Comparative Examples 1 to 4] The components shown in Table 1 were mixed in a blending ratio shown in the table in a V-type blender, and then a vented extruder having a diameter of 30 mm [Nakatani Co., Ltd.]
VSK-30] at a cylinder temperature of 280 ° C. After drying the pellets at 120 ° C. for 5 hours, a test piece was prepared at a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. using an injection molding machine [T-150D manufactured by FANUC Co., Ltd.]. Was.

After the pellets were dried at 120 ° C. for 5 hours, a parison was formed using a blow molding machine [Sumitomo Become SE51 / BA2 manufactured by Sumitomo Heavy Industries, Ltd.], and a parison was formed at a position of Li = 50 cm. The drawdown properties were measured. Screw diameter of blow molding machine used is 50mm
φ, the outer diameter of the die is 60 mmφ, and the inner diameter of the die is 56 mmφ. In addition, mold the parison obtained, blow it,
A box-shaped blow molded product of W100 mm × T40 mm × H300 mm was obtained. The molding conditions at this time were: cylinder temperature 280 ° C., mold temperature 80 ° C., blow air pressure 5 kgf /
cm ² .

The symbols for each component shown in Table 1 are as follows. (A) Aromatic polycarbonate resin Polycarbonate having a viscosity average molecular weight of 25,000 manufactured from bisphenol A and phosgene [Teijin Chemical Co., Ltd.
Panlite L-1250] (hereinafter referred to as PC) (B) Ultra-high molecular weight aromatic polycarbonate resin A polycarbonate having a viscosity average molecular weight of 120,000 produced from bisphenol A and phosgene (hereinafter referred to as UHM-
(C) PC (C) Inorganic filler Wollastonite: WIC10; manufactured by Kinsei Matek Co., Ltd., average diameter (D) = 4.5 µm, aspect ratio L
/ D = 8 (hereinafter referred to as W-1) Wollastonite: NN-4; manufactured by Tomoe Kogyo Co., Ltd., average diameter (D) = 4 μm, aspect ratio L / D = 20 (hereinafter W-)
2) Glass fiber: 3PE-941; manufactured by Nitto Boseki Co., Ltd., average diameter (D) = 13 μm Aspect ratio L / D = 230 (hereinafter referred to as CS) (D) Olefin wax α-olefin and anhydrous maleic Olefin-based wax copolymerized with acid: Diacarna-PA30; manufactured by Mitsubishi Kasei Corporation (maleic anhydride content = 10% by weight) (hereinafter referred to as WAX) (E) Flame retardant Halogen-based flame retardant (tetrabromo Bisphenol A carbonate oligomer) [FG-7 manufactured by Teijin Chemicals Ltd.]
000] (hereinafter referred to as FR-1) Phosphorus flame retardant (triphenyl phosphate) [TPP manufactured by Daihachi Chemical Co., Ltd.] (hereinafter referred to as FR-2) (F) Rubbery polymer Butadiene-alkyl acrylate-alkyl Methacrylate copolymer: EXL-2602; manufactured by Kureha Chemical Industry Co., Ltd. (hereinafter referred to as E-1) A composite rubber in which a polyorganosiloxane component and a polyalkyl (meth) acrylate rubber component have an interpenetrating network structure. : S-2001; manufactured by Mitsubishi Rayon Co., Ltd.)
(Hereinafter referred to as E-2) (G) Anti-dripping agent Polytetrafluoroethylene having fibril-forming ability [Polyflon F-201L manufactured by Daikin Industries, Ltd.]

[0044]

[Table 1]

[0045]

According to the resin composition of the present invention, the number of ribs in the product can be reduced, the product design of the blow molded product is easy, and the thickness can be further reduced. The surface appearance of the blow molded product is good, and more specifically, it is excellent in mechanical properties such as impact strength, fatigue properties, rigidity, blow moldability, and flame retardancy. Useful for various industrial applications.

[Brief description of the drawings]

FIG. 1 is a diagram for measuring the drawdown property of the present invention.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI // (C08L 69/00 23:26 101: 04 27:18) B29K 69:00

Claims (3)

[Claims] 1. A viscosity average molecular weight of 10,000 to 40,0.
No. 00 aromatic polycarbonate resin (component A) 98-7
0% by weight and a viscosity average molecular weight of 70,000 to 200,0
With respect to 100 parts by weight of the aromatic polycarbonate resin composition comprising 2 to 30% by weight of the ultrahigh molecular weight aromatic polycarbonate resin (component B) of No. 00, the aspect ratio L / D =
1 to 100 parts by weight of 3 to 50 wollastonite (component C), 0.02 to 5 parts by weight of an olefin wax containing a carboxyl group and / or a carboxylic anhydride group (component D), a flame retardant (component E) A) A flame-retardant aromatic polycarbonate resin composition having excellent blow moldability, comprising 0.5 to 30 parts by weight of a flame retardant aid (component G) of 0 to 2 parts by weight. 2. The flame retardant (component E) is a brominated bisphenol-based polycarbonate resin, or the flame retardant (component E) is a phosphorus-based flame retardant, and the flame retardant auxiliary (component G) has a fibril-forming ability. The flame-retardant aromatic polycarbonate resin composition according to claim 1, which is tetrafluoroethylene. 3. A molded article formed from the flame-retardant aromatic polycarbonate resin composition according to claim 1 or 2 having excellent blow moldability.