JP3330771B2 - Permanent antistatic polycarbonate resin composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a permanent antistatic polycarbonate resin composition. The present invention
The present invention relates to a resin composition having heat resistance, impact resistance, and a significantly improved antistatic property, and in particular, has permanent antistatic properties, and thus is required to have durability of antistatic properties. It can be used in the field of electronic equipment or precision machinery.

[0002]

2. Description of the Related Art In general, a synthetic polymer material has a high electric resistance value and is easily charged by friction or peeling, and adsorbs dirt and dust to impair the appearance. Further, in the field of electric and electronic devices, troubles caused by these problems often occur, and a new material excellent in permanent antistatic property is required.

Conventionally, various studies have been made as a means for imparting antistatic properties to synthetic resin products. Generally, a surfactant-based antistatic agent is applied to a molded article,
Alternatively, a method of imparting antistatic properties by kneading an antistatic agent into a resin material is known.

[0004] However, such means has a drawback that the antistatic agent in the surface layer is removed and the antistatic property is lost due to long-term use. Further, there is a disadvantage that the antistatic property is lost due to frictional wear and the like.

[0005] Among them, as a polycarbonate resin composition having permanent antistatic properties, for example, JP-A-62-2
73252 has a polyetherester unit of 95 to 10
A resin composition comprising a polyetherester amide in a weight% and a polycarbonate resin is proposed. JP-A-1-163252 discloses a polyetherester amide containing 90 to 10% by weight of a polyetherester unit, a polycarbonate resin, an aromatic vinyl monomer, a (meth) acrylate monomer, and a vinyl cyanide monomer. A resin composition comprising a polymer of a vinyl monomer selected from a monomer and a bismaleimide monomer and a rubbery polymer has been proposed. The present inventor has also studied and filed a patent application for a composition having permanent antistatic properties. That is,
Japanese Patent Application No. 6-15288 proposed a permanent antistatic resin composition having improved heat stability, which is obtained by adding a compound having a spiro ring to a polycarbonate resin, a polyester resin and a block copolyamide resin.

[0006]

However, all of these permanent antistatic resin compositions have improved antistatic properties to some extent, but may cause poor appearance of polycarbonate resin molded articles, and are still in use. Not enough. In view of these circumstances, the present invention has significantly improved antistatic properties, maintains excellent antistatic properties even during long-term use, does not cause appearance defects of molded products, and has excellent impact strength, Another object of the present invention is to provide a polycarbonate resin composition having a small decrease in heat resistance.

[0007]

Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies, and as a result, by adding a polymer compound having a specific structure to a conventional antistatic composition. It has been found that the antistatic property can be greatly improved.

That is, the present invention relates to (a) 50 to 95 parts by weight of an aromatic polycarbonate resin, (b) 2 to 40 parts of a block copolyamide resin, and (c) an aromatic polyester resin 2
To 50 parts by weight and (d) 1 to 30 parts by weight of a multilayer polymer having a specific structure.

According to the present invention, the antistatic property is greatly improved by adding a multilayer structure polymer having a specific structure. It does not impair the electronic control, and also improves the appearance defects such as pearl luster and peeling when formed into a molded product.

Hereinafter, the present invention will be described specifically. The aromatic polycarbonate resin, which is one component of the composition of the present invention, is not particularly limited as long as it is a polycarbonate derived from an aromatic dihydroxy compound. That is, a homopolymer derived from a single aromatic dihydroxy compound, a copolymer derived from two or more aromatic dihydroxy compounds, and an aromatic polymer having three or more hydroxy groups in a molecule. Either a branched copolymer derived from an aromatic dihydroxy compound containing a small amount of a hydroxy compound or a terminal-modified polymer derived from an aromatic hydroxy compound containing a small amount of an aromatic monohydroxy compound can be used. Of course, a mixture of two or more of these polymers or copolymers may be used as the aromatic polycarbonate resin. These polymers are usually obtained by reacting an aromatic dihydroxy compound or a small amount thereof with a phosgene or carbonic acid diester. It is not limited by the manufacturing method of the union.

Examples of the aromatic dihydroxy compound include 2,2-bis (4-hydroxyphenyl) propane (also referred to as bisphenol A), tetramethylbisphenol A, tetrabromobisphenol A, and bis (4
-Hydroxyphenyl) -p-diisopropylbenzene, hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl and the like can be used. Usually, a bis (4-hydroxyphenyl) alkane-based dihydroxy compound is selected, and particularly, bisphenol A or a combination of bisphenol A and another aromatic dihydroxy compound is preferable.

Specific examples of the aromatic polyhydroxy compound used for obtaining the branched copolymer include phloroglucinol, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl). ) Heptene-2,4,6-
Dimethyl-2,4,6-tri (4-hydroxyphenyl) heptane, 2,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptene-3,1,3,5
-Tri (4-hydroxyphenyl) benzene, 1,1,
1-tri (4-hydroxyphenyl) ethane and the like. Its precursor compound, 3,3-bis (4-
Hydroxyaryl) oxindole (also called isatin bisphenol), 5-chlorisatin, 5,7-
Dichlorisatin, 5-bromoisatin and the like can also be used. The amount of the aromatic polyhydroxy compound or its precursor compound used is selected such that a part of the dihydroxy compound, for example, 0.1 to 2 mol% is substituted with the polyhydroxy compound.

Further, as the hydroxy compound suitable for terminal modification, that is, for controlling the molecular weight, phenols substituted at the m-position or p-position are generally used. Specifically, m-methylphenol is used. And alkyl-substituted products such as p-methylphenol, m-propylphenol, p-propylphenol, p-tert-butylphenol and p-long-chain alkyl-substituted phenols, and halogen-substituted products such as p-bromophenol.

In the present invention, the molecular weight of the aromatic polycarbonate resin is 10,000 to 1 as a viscosity average molecular weight calculated from the viscosity of a methylene chloride solution at 25 ° C.
0000, preferably in the range of 15,000 to 50,000.

The block copolyamide resin, which is another component of the composition of the present invention, has a polyamide block and a polyetherester block, and the polyamide block and the polyetherester block have an ester bond (-C
OO-) or an amide bond (-CONH-).

Thus, in the present invention, the repeating units constituting the polyamide block are a) a case of an aminocarboxylic acid having 6 or more carbon atoms or a lactam thereof;
b) In some cases, salts of dicarboxylic acids with diamines having 6 or more carbon atoms. Of course, both may be mixed. As specific repeating units, in the case of a), 6-aminocaproic acid, 7-aminoenanthic acid, 8-aminocaprylic acid, 9-aminopergonic acid, 10-aminocapric acid, 11-aminoundecanoic acid, 12-amino Examples thereof include ω-aminocarboxylic acids such as dodecanoic acid and ω-lactams such as caprolactam, enantholactam, caprylactam, and laurolactam. In the case of b), salts of diamine-dicarboxylic acids such as hexamethylenediamine-adipate, hexamethylenediamine-sebacate, and hexamethylenediamine-isophthalate are exemplified. Practically, especially caprolactam, 1
2-Aminododecanoic acid and hexamethylenediamine-adipate are preferably used.

The repeating unit constituting the polyetherester block has a number average molecular weight of 200 to 6000.
A poly (alkylene oxide) glycol polyether segment and a dicarboxylic acid having 4 to 20 carbon atoms. The molar ratio of the polyether segment to the dicarboxylic acid in the polyether ester block is usually 1:
It is one.

The poly (alkylene oxide) glycol includes polyethylene glycol, poly (1,2-propylene oxide) glycol, poly (1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly ( Hexamethylene oxide) glycol, a block or random copolymer of ethylene oxide and propylene oxide, and a block or random copolymer of ethylene oxide and tetrahydrofuran. Among these, polyethylene glycol is particularly preferably used because of its excellent antistatic properties.

The dicarboxylic acids having 4 to 20 carbon atoms include terephthalic acid, isophthalic acid, phthalic acid,
Naphthalene-2,6-dicarboxylic acid, naphthalene-2,
Aromatic dicarboxylic acids such as 7-dicarboxylic acid, diphenyl-4,4-dicarboxylic acid, diphenoxyethane dicarboxylic acid, sodium 3-sulfoisophthalate;
Of alicyclic dicarboxylic acids such as 4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, dicyclohexyl-4,4-dicarboxylic acid, succinic acid, oxalic acid, adipic acid, sebacic acid and dodecanediacid (decanedicarboxylic acid) And aliphatic dicarboxylic acids. Among them, especially terephthalic acid, isophthalic acid, 1,
4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid and dodecanediacid are preferably used in terms of polymerizability, color tone and physical properties.

In the composition of the present invention, it is important that the block copolyamide resin is selectively ubiquitous in the surface layer of the molded article from the viewpoint of imparting antistatic properties to the molded article. For this purpose, the block copolyamide resin used has a weight average molecular weight of 50,000 to 20,000.
0, preferably in the range of 70,000 to 120,000. When the weight average molecular weight is less than 50,000, dispersion of the block copolyamide resin in the composition becomes unstable, and the antistatic property of the composition is easily affected by molding conditions. On the other hand, when it exceeds 200000, it becomes difficult for the block copolyamide resin to form a molded product surface layer of the composition, and the antistatic effect becomes insufficient. In relation to the other resin components in the composition, the molecular weight of each resin is selected so that the difference in viscosity between the aromatic polycarbonate resin and the aromatic polyester resin and the block copolyamide resin at the time of melting is reduced. It is important. As a result, even under more severe conditions, there is no peeling phenomenon, and more stable antistatic property is achieved. The composition of the block copolyamide resin is preferably such that the polyetherester block unit is in the range of 95 to 10% by weight in the block copolyamide resin. 95% by weight of polyetherester block units
When the value exceeds, the block copolyamide resin can be ubiquitously present on the surface layer of the molded product, but the surface hardness is low and the surface is easily damaged and the mechanical strength is low. On the other hand, if it is less than 10% by weight, the obtained resin has insufficient antistatic properties. When an amount of the block copolyamide resin required to satisfy the antistatic effect is added, heat resistance and mechanical strength are significantly reduced.

The block copolyamide resin is not limited by the production method. That is, as a polymerization method of the block copolyamide, for example, (A) (a) aminocarboxylic acid or lactam is reacted with (c) dicarboxylic acid to form a polyamide prepolymer having carboxylic acid groups at both ends, and A) reacting the poly (alkylene oxide) glycol under vacuum, (B) (a) (b)
The compound (c) is charged into a reaction vessel, and a pressure reaction is performed at a high temperature in the presence or absence of water to generate a carboxylic acid-terminated polyamide prepolymer, and then the polymerization is carried out under normal pressure or reduced pressure. Method (C) The above (a)
Known methods such as a method in which the compounds (b) and (c) are simultaneously charged into a reaction vessel and melt-mixed, and then the polymerization is allowed to proceed at once in a high vacuum can be used.

The aromatic polyester resin, which is another component of the composition of the present invention, is a polyester having a structural unit of an aromatic dicarboxylic acid and a glycol, which is known as an engineering plastic, or a polyester containing the polyester as a main component. Is used. By using these aromatic polyester resins in combination, the dispersibility of the block copolyamide resin which is an antistatic agent is improved, and as a result, not only appearance defects such as peeling and antistatic properties are improved, but also
This is because a decrease in weld strength is also suppressed. Usually, it is selected from polymers and copolymers obtained by a polycondensation reaction of terephthalic acid, isophthalic acid or its ester-forming derivative with glycol. Among them, polyalkylene terephthalates, for example, polyethylene terephthalate (PET), obtained by a polycondensation reaction between terephthalic acid or a dialkyl ester thereof and an aliphatic glycol
Or polybutylene terephthalate (PBT), or a copolymer mainly composed of the same.

As the glycol, for example, ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene glycol and the like are used. These aliphatic glycols can be used in combination with other diols or polyhydric alcohols in a small amount. In particular,
For example, it can be used in combination with cyclohexanediol, cyclohexanedimethanol, xylene glycol, 2,2-bis (4-hydroxyphenyl) propane, glycerin, pentaerythritol and the like. The amount of the other diol or polyhydric alcohol to be used is desirably 40 parts by weight or less based on 100 parts by weight of the aliphatic glycol.

Further, as the aromatic dicarboxylic acid, for example, terephthalic acid or dimethyl terephthalate which is a dialkyl ester thereof is used. Along with these, other dicarboxylic acids or polycarboxylic acids can be used in combination if they are in small amounts. Specifically, for example, phthalic acid,
Isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, adipic acid, sebacic acid, trimellitic acid and their dialkyl esters can be used in combination. The amount of these other carboxylic acids or their esters is preferably 40 parts by weight or less based on 100 parts by weight of terephthalic acid or its dialkyl ester.

In the present invention, the number average molecular weight of the aromatic polyester resin is in the range of 2,000 to 60,000, and more preferably in the range of 25,000 to 52,000.

As one component of the composition of the present invention, a multi-layered polymer having a specific structure is used, which improves the impact resistance, poor appearance such as pearl luster and antistatic property of the composition. That is, this multilayer structure polymer has a core layer composed of a rubber-like polymer formed from an alkyl acrylate monomer having an alkyl group having 2 to 8 carbon atoms, and has an aromatic vinyl monomer or an aromatic vinyl monomer. It has an outermost shell layer made of a hard glassy polymer formed from an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith.

The monomers forming the rubbery polymer include:
In addition to alkyl acrylates having alkyl groups having 2 to 8 carbon atoms, such as ethyl acrylate, n-butyl acrylate, and 2-ethylhexyl acrylate, which are main components, allyl methacrylate, 1,4-butylene glycol diacrylate, divinyl benzene, and the like And, if necessary, other monomers copolymerizable with an alkyl acrylate such as methyl methacrylate. As the rubbery polymer, a polymer having a low glass transition temperature, for example, 0 ° C. or lower, preferably −40 ° C. is used. Specifically, it is preferable to use n-butyl acrylate rubber and 2-ethylhexyl acrylate rubber from the viewpoint of weather resistance and impact resistance.

The monomers forming the hard glassy polymer include aromatic vinyl monomers such as styrene and α-methylstyrene, acrylonitrile, methacrylonitrile, and the like.
A vinyl monomer copolymerizable with an aromatic vinyl monomer such as methyl methacrylate is exemplified. In addition to these monomers, crosslinkable comonomers such as allyl methacrylate, 1,4-butylene glycol diacrylate, and divinylbenzene are used in combination, if necessary. As the hard glassy polymer, an acrylonitrile-styrene copolymer or a styrene polymer is usually used from the viewpoint of improving the antistatic property.

The polymer having a multilayer structure is not limited to a two-layer structure consisting of a core layer and an outermost shell layer, but may have a three-layer structure or a multilayer structure having more layers if necessary. The important point here is in the selection of the components constituting the core layer and the outermost shell layer, and the inner shell layer in the case of forming a multilayer structure appropriately selects the components so that the characteristics of the resin composition of the present invention can be improved. Other properties can be improved while holding.

The multilayer polymer has an innermost core layer formed of an aromatic vinyl monomer or an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith, inside the core layer. It may be. For example, JP-A-5-22
2140, the innermost layer is formed of an aromatic vinyl monomer, the intermediate layer is formed of a rubbery polymer having a low glass transition temperature, and the outermost layer is an aromatic vinyl monomer alone or A multilayer polymer material formed by copolymerizing an aromatic vinyl monomer and a monomer copolymerizable therewith,
Since it has a remarkable effect in improving appearance defects such as pearl luster, it can be advantageously used in the present invention.

The multi-layer polymer having a specific structure of the present invention can be obtained by a continuous multi-stage seed polymerization in which the polymer of the previous stage is successively coated with the polymer of the subsequent stage. Basically, an alkyl acrylate rubber-like polymer core layer containing a crosslinking component having a low glass transition temperature,
An aromatic vinyl-based glassy polymer outermost layer for improving the adhesion of the composition to the matrix.

In the resin composition of the present invention, the composition ratio of each of the above components is as follows:
To 95 parts by weight, preferably 70 to 90 parts by weight, (b) 2 to 40 parts by weight of the block copolyamide resin, preferably 5 to 5 parts by weight.
To 15 parts by weight, (c) aromatic polyester resin 2 to 50
Parts by weight, preferably 5 to 30 parts by weight, and (d) 1 to 30 parts by weight of the multilayer polymer, preferably 3 to 10 parts by weight.

In the resin composition of the present invention, if the amount of the aromatic polycarbonate resin (a) is too small, the heat resistance is inferior, and if it is too large, the antistatic property is insufficient. (B) When the amount of the block copolyamide resin is too small, the antistatic property is insufficient, and when the amount is too large, the resin composition becomes too flexible and the mechanical strength is inferior. If the amount of the aromatic polyester resin (c) is too small, the effects of the above-mentioned various properties improvement such as improvement of the peeling phenomenon are insufficient, and if it is too large, the heat resistance is greatly reduced. (D) When the amount of the multi-layered polymer is small, the impact resistance is reduced, and when the amount is large, the elastic modulus is greatly reduced.

The method for producing the resin composition of the present invention is not particularly limited. For example, (a) an aromatic polycarbonate resin, (b) a block copolyamide resin, (c)
A method in which the aromatic polyester resin and (d) the multilayer structure polymer are melt-kneaded at once, or (a) and (b) or (a) and (c) are melt-kneaded in advance, and then (c) or (b) ) And (d) and melt kneading may be selected.

The resin composition of the present invention may contain, in addition to the above components, various stabilizers such as an ultraviolet absorber, and additives such as pigments, dyes, lubricants, flame retardants, mold release agents, and slidability improvers. Alternatively, if necessary, a reinforcing material such as glass fiber, glass flake, or carbon fiber, or a whisker such as potassium titanate or aluminum borate can be added. further,
The resin composition of the present invention does not cause a reduction in the intended antistatic effect even when used in combination with a surface property improving agent such as a release agent or a sliding property improving agent.

[0036]

The present invention will be specifically described below with reference to examples and the like. The physical property evaluation was performed by drying the resin composition pellets of the examples or comparative examples at 120 ° C. for 5 hours, molding a specified test piece at a cylinder temperature of 260 ° C. using an injection molding machine, and performing the following procedure. Was.

1) Antistatic Property Regarding the antistatic property, a) surface specific resistance and b)
The charge half-life was measured. a) Surface specific resistance: Using an Ultra High Resistance Meter (manufactured by Advantest), ASTM D-
According to 257, the test piece was left for 7 days at a temperature of 23 ° C. and a humidity of 50% to adjust the condition, and then the surface resistivity was measured. It can be evaluated that the smaller the value, the better the antistatic property. b) Relative charging value and half-life: Using a static honest meter (manufactured by Shisido Electrostatic Co., Ltd.), the test piece was charged under the conditions of a charging voltage of 7 KV and a charging time of 30 seconds, and the charge amount (relative value) was measured. After the measurement, the applied voltage was turned off, and the decay state of the charge amount was measured. The half-life represents the time from when the imprinting voltage is cut to when the charge amount (relative value) is reduced by half. The smaller the value, the better the antistatic property can be evaluated.

2) Deflection temperature under load According to ASTM D-648, a flexural flake-shaped test piece having a thickness of 6.4 mm was measured under a high load condition. 3) The impact strength of the notched test piece was measured according to Izod ASTM D-256.

4) Appearance As for the appearance, a) pearl luster and b) peeling phenomenon were observed by visual observation of the molded article. The evaluation was based on the following criteria. a) Pearl gloss: "Yes" if a stripe pattern appears on the surface,
Otherwise, it was set to "none". b) Peeling phenomenon: "Presence" when a mica-like separated state was observed in the vicinity of the gate of the molded product, and "No" when it was not.

In the following examples, the terms and abbreviations used have the following meanings. (Terms or abbreviations) (Meaning) 2EHA 2-ethylhexyl acrylate BA n-butyl acrylate MMA methyl methacrylate EA ethyl acrylate St styrene AN acrylonitrile ALMA allyl methacrylate BGA 1,4-butylene glycol diacrylate DVB divinylbenzene DIW deionized water SSS dioctyl Sulfosuccinate sodium salt SPS Sodium persulfate SHC Sodium bicarbonate E-2000 Made by Mitsubishi Gas Chemical Company, Inc., trade name Iupilon E-2000. Poly-4,4'-isopropylidene diphenyl carbonate having a viscosity average molecular weight of 28,000. PAS-40T manufactured by Toray Industries, Inc., trade name PAS-40T. Polyether block copolyamide with a weight average molecular weight of 100,000. 6 A block copolymer of nylon and polyethylene glycol polyester. PEP-36 Phosphorus-containing compound manufactured by Asahi Denka Co., Ltd., trade name ADK STAB P EP-36. It is represented by the following chemical formula.

Embedded image PA-200 manufactured by Mitsubishi Rayon Co., Ltd., trade name: Diapet PA-200D. Polyethylene terephthalate having a number average molecular weight of 51,000. G-1651 Impact modifier manufactured by Shell Chemical Company, trade name Clayton G-1651. Hydrogenated SBS. TR-2000 Impact modifier, trade name JSR TR-2000 manufactured by Nippon Synthetic Rubber Co., Ltd. SBS.

[0041]

Production Example Impact modifier A-1 used in the following Examples
A to A-4 (multilayer polymer) were produced by the methods shown in Production Examples 1 to 4 below. In addition, the weight average particle diameter of the multilayer structure polymer obtained in the production example, using a laser particle size analysis system LPA-3000 manufactured by Otsuka Electronics Co., Ltd.,
It was measured.

[0042]

[Production Example 1] In a 5-liter capacity polymerization vessel equipped with a reflux condenser, DIW (1120 g), 1% SSS aqueous solution (32 g) and 1% SHC aqueous solution (80 g) were charged, and the temperature was raised to 70 ° C while refluxing under a nitrogen stream. Next, 80 g of EA was added and dispersed for 10 minutes.
0 g was added to initiate seed polymerization. Subsequently, 70 ° C
And the following first-stage monomer emulsion (2027 g) was added to 18
The solution was continuously fed over 0 minutes, and then aged at 80 ° C. for 1 hour.

[First-stage monomer emulsion]

 BA 1315 g BGA 2.5 g ALMA 2.5 g SSS 1% aqueous solution 532 g SHC 1% aqueous solution 70 g DIW 105 g

Subsequently, 30 g of a 2% aqueous solution of SPS was added, and 540 g of the following second-stage monomer emulsion was added to 6 g of
It was added over 0 minutes, and after the second stage polymerization was performed at 80 ° C., the mixture was aged at 80 ° C. for 1 hour.

[Second-stage monomer emulsion]

 MMA 299.8 g BGA 0.6 g ALMA 0.6 g SSS 1% aqueous solution 120 g SHC 1% aqueous solution 30 g DIW 90 g

Subsequently, 25 g of a 2% aqueous solution of SPS was added, and 525 g of the following third-stage monomer emulsion was added to 6
After adding over 0 minutes and performing the third stage polymerization at 75 ° C., the mixture was aged at 80 ° C. for 1 hour.

[Third-stage monomer emulsion]

St 225 g AN 75 g SSS 1% aqueous solution 100 g SHC 1% aqueous solution 25 g DIW 100 g After completion of the reaction, the mixture was cooled to room temperature and filtered through a 300-mesh stainless steel mesh to obtain a latex of a multilayer structure polymer having a weight average particle diameter of 286 nm. Was. This latex
The precipitate was coagulated by freeze-thawing, washed with water, dehydrated, and dried to obtain an impact modifier A-1 (multilayer polymer).

[0045]

Production Examples 2 to 4 Emulsion polymerization was carried out in the same manner as in Production Example 1 with the composition shown in Table 1, and the obtained latex was frozen, thawed, washed with water, dehydrated and dried to obtain impact modifiers A-2 to A-2. A-4 (multilayer polymer) was obtained.

[0046]

[Table 1]

[0047]

Example 1 (a) 70 parts by weight of aromatic polycarbonate resin E-2000 (b) 10 parts by weight of block copolyamide resin PAS-40T (c) 15 parts by weight of polyethylene terephthalate PA-200 (d) Impact modifier A- 15 parts by weight (e) Stabilizer PEP-36 0.1 parts by weight After blending each of the above components for 20 minutes using a tumbler, the mixture was extruded at a cylinder temperature of 260 ° C. using a twin-screw extruder to obtain pellets. Table 2 shows the composition and physical property evaluation results.

[0048]

Example 2 In Example 1, the amount of E-2000 was changed to 5
Pellets were obtained in the same manner as in Example 1, except that the amount was changed to 0 parts by weight and the amount of PAS-40T was changed to 30 parts by weight. The composition and evaluation results are also shown in Table 2.

[0049]

Example 3 In Example 1, the amount of E-2000 was changed to 6
Pellets were obtained in the same manner as in Example 1, except that the amount was changed to 5 parts by weight and the amount of A-1 was changed to 10 parts by weight. The composition and evaluation results are also shown in Table 2.

[0050]

Example 4 In Example 1, the impact modifier A-1 was replaced with A
A pellet was obtained in the same manner as in Example 1 except that the pellet was changed to -2. The composition and evaluation results are also shown in Table 2.

[0051]

Example 5 In Example 1, the impact modifier A-1 was replaced with A
Except for changing to -3, pellets were obtained in the same manner as in Example 1. Table 2 also shows the composition and physical property evaluation results.

[0052]

[Table 2]

[0053]

Comparative Example 1 Pellets were obtained in the same manner as in Example 1 except that the impact modifier A-1 was not added. Table 3 shows the composition and physical property evaluation results. Compared with Example 1, it can be seen that the half-life is longer and the Izod impact strength is lower.

[0054]

Comparative Example 2 In Example 1, the impact modifier A-1 was replaced with A
Except for changing to -4, pellets were obtained in the same manner as in Example 1. Table 3 shows the composition and physical property evaluation results. Compared to Example 1, it is understood that the half-life is prolonged.

[0055]

Comparative Example 3 In Example 1, the impact modifier A-1 was changed to G
A pellet was obtained in the same manner as in Example 1, except that the pellet was changed to -1651. Table 3 shows the composition and physical property evaluation results. Compared to Example 1, it is understood that the half-life is prolonged.

[0056]

Comparative Example 4 In Example 1, the impact modifier A-1 was replaced with T
Pellets were obtained in the same manner as in Example 1, except that the pellets were changed to R-2000. Table 3 shows the composition and physical property evaluation results.
It was shown to. Compared to Example 1, it is understood that the half-life is prolonged.

[0057]

[Table 3]

[0058]

From the above results, the present invention provides a composition having excellent thermal stability, heat resistance and durability of antistatic properties as a permanent antistatic material for polycarbonate resin, and further improved antistatic properties. And can be used for many purposes.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-5-222140 (JP, A) JP-A-62-273252 (JP, A) JP-A-7-224217 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) C08L 69/00

Claims (9)

(57) [Claims] 1. An aromatic polycarbonate resin comprising:
95 parts by weight, (b) block copolyamide resin 2 to 40
Parts by weight, (c) 2 to 50 parts by weight of an aromatic polyester resin, and (d) 1 to 30 parts of a multilayer structure polymer, wherein the multilayer structure polymer has an alkyl group having 2 to 8 carbon atoms. Having a core layer made of a rubber-like polymer formed from an acrylate monomer, and formed from an aromatic vinyl monomer or an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith A permanent antistatic polycarbonate resin composition having an outermost shell layer made of a hard glassy polymer. 2. The method according to claim 1, wherein the core layer further comprises an aromatic vinyl monomer or an innermost shell layer formed of an aromatic vinyl monomer and a vinyl monomer copolymerizable therewith. Resin composition. 3. The method according to claim 2, wherein the aromatic polycarbonate resin is 2,2.
Polycarbonate resin derived from 2-bis (4-hydroxyphenyl) propane or 2,2-bis (4-
3. The resin composition according to claim 1, which is a polycarbonate copolymer derived from (hydroxyphenyl) propane and another aromatic dihydroxy compound. 4. The resin composition according to claim 3, wherein the aromatic polycarbonate resin has a viscosity average molecular weight in a range of 10,000 to 100,000. 5. The resin composition according to claim 1, wherein said block copolyamide resin has a polyamide block and a polyetherester block. 6. The resin composition according to claim 5, wherein the weight average molecular weight of the block copolyamide resin is in the range of 50,000 to 200,000. 7. The polyether ester according to claim 1, wherein the polyamide block comprises an aminocarboxylic acid having 6 or more carbon atoms or a lactam thereof and / or a salt of a diamine having 6 or more carbon atoms and a dicarboxylic acid. The block comprises a poly (alkylene oxide) glycol having a number average molecular weight of 200 to 6000 and a dicarboxylic acid having 4 to 20 carbon atoms as constituent units.
The resin composition as described in the above. 8. The aromatic polyester resin is selected from polymers and copolymers obtained by a polycondensation reaction of terephthalic acid, isophthalic acid or an ester-forming derivative thereof with glycols. The resin composition of any one of claims 1 to 7. 9. The resin composition according to claim 8, wherein the aromatic polyester resin has a number average molecular weight in the range of 2,000 to 60,000.