JPH08176424A - Permanently antistatic polycarbonate resin composition - Google Patents

Abstract

PURPOSE: To obtain a polycarbonate resin compsn. which has good thermal stability. heat resistance, and persistence of antistatic properties and an improved resistance to degradation in weld strength. CONSTITUTION: This compsn. contains 60-98 pts.wt. arom. polycarbonate resin, 2--40 pts.wt. block copolyamide resin, 0-30 pts.wt. impact modifier, and 0.01-5 pts.wt. modified arom. hydrocarbon-formaldehyde resin formed by modifying an arom. hydrocarbon-formaldehyde resin with a modifier reactive with methylol, methylene ether, or acetal groups of this resin.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION 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 and impact resistance, and further having significantly improved weld strength. Particularly, since it has permanent antistatic property, it is required to have antistatic durability. It can be used in the field of equipment or precision machinery.

[0002]

2. Description of the Related Art Generally, a synthetic polymer material has a high electric resistance value and is easily charged by friction, peeling, or the like and adsorbs dust or dust to impair its appearance. Further, in the electric and electronic fields, troubles due to them often occur, and a new material excellent in permanent antistatic property is required.

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

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

Among them, examples of the polycarbonate resin composition having a permanent antistatic property include, for example, JP-A-62-6.
23252 has a polyether ester unit of 95 to 10
It proposes a resin composition comprising a polyether ester amide in a weight percentage and a polycarbonate resin. Further, JP-A-1-163252 discloses a polyether ester amide having a polyether ester unit content of 90 to 10% by weight, a polycarbonate resin and an aromatic vinyl monomer, a (meth) acrylic acid ester monomer, and a vinyl cyanide monomer. Polymer compositions of vinyl monomers selected from monomers and bismaleimide monomers and resin compositions composed of rubbery polymers have been proposed. The present inventor has also studied and filed a patent for a composition having a permanent antistatic property. That is,
Japanese Patent Application No. 6-15288 proposes a permanent antistatic resin composition having improved thermal 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, in all of these permanent antistatic resin compositions, the antistatic property is improved to some extent, but the strength of the weld portion due to the block copolyamide resin is greatly reduced. , Still not enough. In view of these circumstances, the present invention provides a polycarbonate resin composition having significantly improved antistatic properties, maintaining excellent antistatic properties even during long-term use, and greatly improving weld strength. Is.

[0007]

Means for Solving the Problems In view of the above-mentioned problems, the inventors of the present invention have conducted a number of trials and researches, and as a result, by adding a compound having a specific structure to a conventional antistatic composition, charging It has been found that the prevention property is maintained and the decrease in weld strength due to the addition of the block copolyamide resin can be significantly suppressed.

That is, the present invention comprises (a) 60 to 98 parts by weight of an aromatic polycarbonate resin, (b) 2 to 40 parts by weight of a block copolyamide resin, (d) 0 to 30 parts by weight of an impact modifier, and (e) an aroma. Modified aromatic hydrocarbon-formaldehyde resin 0.01 obtained by modifying a group hydrocarbon-formaldehyde resin with a modifier having reactivity with a methylol group, a methylene ether group or an acetal group.
A resin composition containing 5 to 5 parts by weight or (a)
50 to 95 parts by weight of aromatic polycarbonate resin, (b)
2 to 40 parts by weight of a block copolyamide resin, 2 to 50 parts by weight of (c) an aromatic polyester resin, 0 to 30 parts by weight of (d) an impact modifier and (e) an aromatic hydrocarbon-formaldehyde resin as a methylol group. The present invention relates to a resin composition containing 0.01 to 5 parts by weight of a modified aromatic hydrocarbon-formaldehyde resin obtained by modifying with a modifier having reactivity with a methylene ether group or an acetal group.

The present invention maintains the antistatic property by adding a compound having a specific structure, and does not impair the intended antistatic property even if another releasing agent or a slidability improving agent is added. In addition, the reduction in weld strength is greatly improved.

The present invention will be specifically described below. 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 ester derived from an aromatic dihydroxy compound. That is, a homopolymer derived from a single aromatic dihydroxy compound, a copolymer derived from two or more kinds of aromatic dihydroxy compounds, and an aromatic polymer having three or more hydroxy groups in a molecule. Either branched copolymers derived from aromatic dihydroxy compounds containing small amounts of hydroxy compounds or end-modified polymers derived from aromatic hydroxy compounds containing small amounts of aromatic monohydroxy compounds can be used. Of course, a mixture of two or more of these polymers or copolymers may be used as the aromatic polycarbonate resin. Incidentally, these various kinds of polymers are usually obtained by reacting an aromatic dihydroxy compound or a small amount thereof with an aromatic polyhydroxy compound and the like with a phosgene or a diester of carbonic acid. It is not limited by the manufacturing method of the united body.

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 bisphenol A or a combination of bisphenol A and another aromatic dihydroxy compound is particularly preferable.

Further, specific examples of the aromatic polyhydroxy compound used for obtaining the branched copolymer include phloroglucinol and 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 etc. are mentioned. Its precursor compound, 3,3-bis (4-
Hydroxyaryl) oxindole (also called isatin bisphenol), 5-chlorisatin, 5,7-
Dichlorisatin, 5-bromoisatin, etc. 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 replaced with the polyhydroxy compound.

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

In the present invention, the molecular weight of the aromatic polycarbonate resin is 16000 to 3 in terms of the viscosity average molecular weight calculated from the viscosity of the methylene chloride solution at 25 ° C.
It is used in the range of 5,000, preferably 17500 to 30,000.

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

In the present invention, therefore, the repeating units constituting the polyamide block are: a) an aminocarboxylic acid having 6 or more carbon atoms or a lactam thereof;
b) It may be a salt of a dicarboxylic acid having 6 or more carbon atoms and a dicarboxylic acid. 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, enanthlactam, capryllactam and laurolactam. Further, in the case of b), diamine-dicarboxylic acid salts such as hexamethylenediamine-adipate, hexamethylenediamine-sebacate, and hexamethylenediamine-isophthalate can be mentioned. Practically, especially caprolactam, 1
2-Aminododecanoic acid and hexamethylenediamine-adipate are preferably used.

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

However, as the poly (alkylene oxide) glycol, 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, a block or random copolymer of ethylene oxide and tetrahydrofuran, and the like. Among these, polyethylene glycol is particularly preferably used because of its excellent antistatic properties.

Further, as the dicarboxylic acid having 4 to 20 carbon atoms, 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, diphenoxyethanedicarboxylic acid, sodium 3-sulfoisophthalate, 1,
Of cycloaliphatic dicarboxylic acids such as 4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, dicyclohexyl-4,4-dicarboxylic acid, succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanedicarboxylic acid (decanedicarboxylic acid) Examples thereof include aliphatic dicarboxylic acids. Among them, especially terephthalic acid, isophthalic acid, 1,
4-Cyclohexanedicarboxylic acid, adipic acid, sebacic acid and dodecanedioic acid are preferably used in terms of polymerizability, color tone and physical properties.

The composition of the block copolyamide resin is preferably such that the polyether ester block unit is in the range of 95 to 10% by weight in the block copolyamide resin. The polyether ester block unit is 9
If it exceeds 5% by weight, the block copolyamide resin can be ubiquitous in the surface layer of the molded product, but the surface hardness is low and it is easily scratched, and the mechanical strength is low. On the other hand, if it is less than 10% by weight,
The obtained resin has an insufficient antistatic property. When the block copolyamide resin is added in an amount necessary to satisfy the antistatic effect, heat resistance and mechanical strength are significantly reduced.

The block copolyamide resin is not limited by the manufacturing method. That is, as a method for polymerizing a block copolyamide, for example, (A) (a) an aminocarboxylic acid or lactam and (c) a dicarboxylic acid are reacted to prepare a polyamide prepolymer having carboxylic acid groups at both ends, and (b) ) Method of reacting poly (alkylene oxide) glycol under vacuum, (B) (a) (b)
The compound of (c) is charged into a reaction tank and pressure-reacted at high temperature in the presence or absence of water to produce a carboxylic acid-terminated polyamide prepolymer, and then the polymerization is advanced under normal pressure or reduced pressure. Method, (C) above (a)
A known method 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 carried out all at once under high vacuum can be used.

As the aromatic polyester resin which is another component which is preferably used in the composition of the present invention, a polyester having an aromatic dicarboxylic acid and glycol as constitutional units, which is known as engineering plastic, or the same is used. The 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 the poor appearance such as peeling and the antistatic property are improved, but also the weld strength is improved. This is because the decrease is suppressed. Usually, it is selected from polymers and copolymers obtained by polycondensation reaction of terephthalic acid, isophthalic acid or its ester-forming derivative with glycol. Among them, polyalkylene terephthalates, such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), obtained by the polycondensation reaction of terephthalic acid or its dialkyl ester with an aliphatic glycol, or a copolymer mainly composed of them are It is preferably used.

As the glycol, for example, ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene glycol or the like is used. These aliphatic glycols can be used in combination with other diols and 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 these other diols or polyhydric alcohols used is preferably 40 parts by weight or less with respect to 100 parts by weight of the aliphatic glycol.

As the aromatic dicarboxylic acid, for example, terephthalic acid or its dialkyl ester such as dimethyl terephthalate is used. With these, a small amount of other dicarboxylic acid or polyvalent carboxylic acid can be used in combination. 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 used 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 aromatic polyester resin having a number average molecular weight in the range of 2000 to 60,000 is used, and more preferably in the range of 25,000 to 52,000.

The modified aromatic hydrocarbon-formaldehyde resin, which is another component of the composition of the present invention, is an aromatic hydrocarbon-formaldehyde obtained by reacting an alkylbenzene and formaldehyde, preferably in the presence of an acid catalyst. The resin is treated with a methylol group (—CH ₂ O) in the resin.
H), methylene ether groups (-CH ₂ OCH ₂ -) or an acetal group _{(-CH 2 (OCH 2) n} OCH 2 -)
It is a denaturant having reactivity with respect to, and is obtained by denaturing.

As the aromatic hydrocarbon-formaldehyde resin, a liquid or solid resin having a structure represented by the following chemical formula 1 at room temperature is selected. The number average molecular weight of the resin is 300 or more, preferably 500 or more, more preferably 600 or more.

[0028]

Embedded image

(Wherein R ¹ is the same or different methylene group, methylene ether group or acetal group, R ² is the same or different methylol group,
Methylene methoxy group, ethylene methoxy group, methylene ethoxy group, dimethylene ether methoxy group, R ³
Are the same or different lower alkyl groups,
m is an integer of 0 to 3, and p is 0 or a positive integer. )

The alkylbenzene, which is a raw material for the aromatic hydrocarbon-formaldehyde resin, is not particularly limited, but specifically, toluene, ethylbenzene,
Examples thereof include xylene, methylethylbenzene and trimethylbenzene. Preferred are xylenes and trimethylbenzenes, and more preferred are m-xylene and mixed xylenes mainly containing m-xylene, 1,3,3.
5-Trimethylbenzene is used.

The modifier for modifying the aromatic hydrocarbon-formaldehyde resin is not particularly limited as long as it has reactivity with a methylol group, a methylene ether group, and an acetal group, but specifically, Can be illustrated. (1) Phenols o-, m-of phenol, resorcin, bisphenol-A, cresol, p-tert-butylphenol, etc.
Or p-alkylphenol; novolak, which is a condensation product of phenol and formaldehyde. (2) Aromatic carboxylic acids Benzoic acid, p-hydroxybenzoic acid, p-aminobenzoic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, trimellitic anhydride, pyromellitic acid, naphthoic acid. (3) Saturated or unsaturated, aliphatic or alicyclic carboxylic acids Maleic anhydride, fumaric acid, stearic acid, adipic acid, dimer acid, resin acid, rosin, 3,6-endomethylenetetrahydrophthalic acid, tetrahydro Terephthalic acid; saturated aliphatic hydroxycarboxylic acid having 3 to 6 carbon atoms such as lactic acid, glyceric acid, malic acid, tartaric acid, citric acid and gluconic acid. (4) Alcohols tert-butyl alcohol, ethylene glycol, glycerin, 1,4-tetramethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, xylene glycol. (5) Amines Aniline, phenylenediamine, xylylenediamine. (6) Other aromatic hydrocarbons such as acenaphthene, acenaphthylene, and anthracene.

The amount of the modifier used may vary depending on the kind of the modifier used, but is generally not more than 8 times by weight, preferably not more than 5 times by weight, and more preferably not more than 5 times by weight, based on the aromatic hydrocarbon-formaldehyde resin. The amount is preferably in the range of 0.2 to 2.5 times by weight. Further, the type of the modifier and the amount to be introduced into the resin are such that the finally obtained modified aromatic hydrocarbon-formaldehyde resin is a thermoplastic resin having a number average molecular weight of 500 or more and a softening point of 60 to 200 ° C. Therefore, it is desirable to select.

The impact modifier which is another component preferably used in the composition of the present invention is, for example,
Acrylic ester-based core-shell graft copolymer,
Styrene core-shell graft copolymer, MBS resin, MABS resin, polyester elastomer, SB
Examples include R, SEBS, polyurethane elastomers, and the like. Among these, an acrylic acid ester-based core-shell graft copolymer is particularly preferably used because of its compatibility with a matrix such as a polycarbonate resin and heat resistance.

In the resin composition of the present invention, the composition ratio of each of the above components differs slightly depending on the presence or absence of the aromatic polyester resin. That is, when the aromatic polyester resin is not included, (a) the aromatic polycarbonate resin 60 to
98 parts by weight, preferably 70 to 95 parts by weight, (b) block copolyamide resin 2 to 40 parts by weight, preferably 5 to
15 parts by weight, (d) impact modifier 0 to 30 parts by weight, preferably 1 to 10 parts by weight, (e) aromatic hydrocarbon-formaldehyde resin reacted with its methylol group, methylene ether group or acetal group The ratio of the modified aromatic hydrocarbon-formaldehyde resin obtained by modifying with a modifying agent having properties is 0.01 to 5 parts by weight, preferably 0.01 to 2 parts by weight, and when the aromatic polyester resin is included, ( a) 50-95 parts by weight of aromatic polycarbonate resin, preferably 70-90 parts by weight, (b) 2-40 parts by weight of block copolyamide resin, preferably 5-15 parts by weight, (c) aromatic polyester resin 2 50 parts by weight, preferably 5 to 30 parts by weight, (d) impact modifier 0 to 30
Parts, preferably 1 to 10 parts by weight, of (e) aromatic hydrocarbon-formaldehyde resin modified with a modifier having reactivity with its methylol group, methylene ether group or acetal group. 0.01 to 5 parts by weight of hydrogen-formaldehyde resin, preferably 0.0
It is a ratio of 1 to 2 parts by weight.

In the resin composition of the present invention, when the amount of the aromatic polycarbonate resin (a) is small, the heat resistance is poor, and when it is large, the antistatic property is insufficient, which is not preferable. If the block copolyamide resin (b) is too small, the antistatic property is insufficient, and if it is too large, the resin composition becomes too flexible and the mechanical strength becomes poor, which is not preferable. If the amount of the aromatic polyester resin (c) is small, the effects of improving the above-mentioned various properties such as the improvement of the peeling phenomenon are insufficient, and if the amount is large, the heat resistance is greatly reduced, which is not preferable. When the amount of the impact modifier (d) is small, the impact resistance is lowered, and when the amount is large, the elastic modulus is largely lowered, which is not preferable. If the amount of the modified aromatic hydrocarbon-formaldehyde resin (e) exceeds 5 parts by weight, the thermal stability of the resin composition will be insufficient, and if it is less than 0.01 part by weight, the effect of improving the weld strength will be poor, such being undesirable.

The method for producing the resin composition of the present invention is not particularly limited. For example, (a) aromatic polycarbonate resin, (b) block copolyamide resin and (e)
A method in which the modified aromatic hydrocarbon-formaldehyde resin is melt-kneaded together, if necessary, together with (c) the aromatic polyester resin and (d) the impact modifier, and (a) and (b). And (e) or (a) and (c) and (e) are melt-kneaded in advance, and then (c) or (b) and (d) are added and the mixture is melt-kneaded. You can

The resin composition of the present invention contains, in addition to the above-mentioned components, various stabilizers such as ultraviolet absorbers and additives such as pigments, dyes, lubricants, flame retardants, mold release agents and slidability improvers. Alternatively, a reinforcing material such as glass fiber, glass flake, carbon fiber, or a whisker such as potassium titanate or aluminum borate may be added if necessary. When the brominated polymer compound of Chemical formula 1 is added, flame retardance can be achieved by using it alone or in combination with a flame retardant aid such as an antimony compound and an anti-dripping agent. Further, the resin composition of the present invention does not deteriorate the intended antistatic effect even when used together with a surface property improving agent such as a releasing agent or a slidability improving agent.

[0038]

EXAMPLES The present invention will be specifically described below with reference to Examples and the like. The evaluation of physical properties is performed by drying the resin composition pellets of Examples or Comparative Examples at 120 ° C. for 5 hours, molding a designated test piece at a cylinder temperature of 260 ° C. with an injection molding machine, and performing the following steps. It was

1) Antistatic Property Regarding the antistatic property, a) the surface specific resistance value and b)
The charging half-life was measured. a) Surface specific resistance: Ultra high resistance meter (manufactured by Advantest) is used and ASTM D-
According to 257, the test piece was allowed to stand for 7 days under the conditions of a temperature of 23 ° C. and a humidity of 50%, and then the surface resistivity was measured. The smaller the value, the better the antistatic property can be evaluated. b) Charging half-life: Using a static Honest meter, the test piece was charged under the conditions of a printing voltage of 7 KV and a printing time of 30 seconds, the charge amount was measured, and the applied voltage was cut off to determine the charge amount. The decay state was measured. The half-life represents the time until the charge amount (relative value) is halved after the applied voltage is cut off. The smaller the value, the better the antistatic property can be evaluated.

2) Weld Strength According to ASTM D-638, the tensile strength of dumbbell-shaped test pieces was measured. The retention rate was calculated by comparing the tensile strengths of the test pieces with and without the weld portion. The larger this value, the better.

3) Izod According to ASTM D-256, the impact strength of the notched test piece was measured.

In the examples below, the terms and abbreviations used have the following meanings. (Terms or abbreviations) (Meaning) E-2000 Mitsubishi Gas Chemical Co., Inc., trade name Iupilon E-2000. Poly-4,4'-isopropylidene diphenyl carbonate having a viscosity average molecular weight of 28,000. PAS-40T Toray Industries, Inc., trade name PAS-40T. Polyether block copolyamide having a weight average molecular weight of 100,000. A block copolymer of 6-nylon and polyethylene glycol / diester. PEP-36 Phosphorus-containing compound manufactured by Asahi Denka Co., Ltd., trade name ADEKA STAB P EP-36. It is represented by the following chemical formula.

Embedded image NIKANOL-A Mitsubishi Gas Chemical Co., Inc., trade name NIKANOL-A. A terminal carboxyl group-modified xylene resin having a number average molecular weight of 500 to 600 before modification. Maleic anhydride is used as the modifier. The number average molecular weight after modification is 500 to 600, and the softening point is 95 ° C. PA-200 Mitsubishi Rayon Co., Ltd., trade name Diapet PA-200D. Polyethylene terephthalate with a number average molecular weight of 51,000. MG-1011 Impact modifier manufactured by Takeda Pharmaceutical Co., Ltd., trade name Staphyroid MG-1011. Acrylic ester-based core-shell graft copolymer.

[0043]

Example 1 (a) Aromatic polycarbonate resin E-2000 89.5 parts by weight (b) Block copolyamide resin PAS-40T 10 parts by weight (f) Phosphite antioxidant PEP-36 0.05 parts by weight (E) Terminal carboxyl-modified xylene resin NIKANOL-A 0.5 parts by weight The above components were blended in a tumbler for 20 minutes and then extruded at a cylinder temperature of 260 ° C. using a twin-screw extruder to obtain pellets. The composition and evaluation results of physical properties are shown in Table 1.

[0044]

Example 2 In Example 1, the amount of E-2000 was changed to 8
Pellets were obtained in the same manner as in Example 1 except that the amount of NIKANOL-A was changed to 8 parts by weight and the amount of NIKANOL-A was changed to 2 parts by weight.
The composition and evaluation results of physical properties are also shown in Table 1.

[0045]

Example 3 In Example 1, the amount of E-2000 was changed to 7
Pellets were obtained in the same manner as in Example 1 except that the amount was changed to 4.5 parts by weight and the following components were added. (C) Polyethylene terephthalate PA-200 15 parts by weight The composition and evaluation results of physical properties are also shown in Table 1.

[0046]

[Example 4] 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 content was changed to 9.5 parts by weight and the following components were added. (C) Polyethylene terephthalate PA-200 15 parts by weight (d) Impact modifier MG-1011 5 parts by weight The composition and the results of evaluation of physical properties are also shown in Table 1.

[0047]

[Table 1]

[0048]

Comparative Example 1 Pellets were obtained in the same manner as in Example 1 except that NIKANOL-A was not added and the amount of E-2000 was changed to 90 parts by weight. The composition and the evaluation results of physical properties are shown in Table 2. As compared with Example 1, it can be seen that the decrease in weld strength is large.

[0049]

Comparative Example 2 Pellets were obtained in the same manner as in Example 3 except that NIKANOL-A was not added and the amount of E-2000 was changed to 75 parts by weight. The composition and the evaluation results of physical properties are shown in Table 2. As compared with Example 3, it can be seen that the decrease in weld strength is large.

[0050]

Comparative Example 3 Pellets were obtained in the same manner as in Example 4, except that NIKANOL-A was not added and the amount of E-2000 was changed to 70 parts by weight. The composition and the evaluation results of physical properties are shown in Table 2. As compared with Example 4, it can be seen that the decrease in weld strength is large.

[0051]

[Table 2]

[0052]

As is clear from the above results, the polycarbonate resin composition of the present invention has good thermal stability, heat resistance and durability of antistatic property, and further the reduction of weld strength is improved. It is a composition that can be used in many applications as a permanent antistatic material.

Claims (9)

[Claims] 1. (a) Aromatic polycarbonate resin 60 to
98 parts by weight, (b) block copolyamide resin 2-40
Parts by weight, (d) impact modifier 0-30 parts by weight and (e)
Contains 0.01 to 5 parts by weight of a modified aromatic hydrocarbon-formaldehyde resin obtained by modifying an aromatic hydrocarbon-formaldehyde resin with a modifier having reactivity with a methylol group, a methylene ether group or an acetal group. A permanent antistatic polycarbonate resin composition obtained by the method. 2. An (a) aromatic polycarbonate resin 50 to
95 parts by weight, (b) block copolyamide resin 2-40
Parts by weight, (c) 2 to 50 parts by weight of an aromatic polyester resin, (d) 0 to 30 parts by weight of an impact modifier, and (e) an aromatic hydrocarbon-formaldehyde resin in the form of a methylol group, a methylene ether group or an acetal group. A permanent antistatic polycarbonate resin composition containing 0.01 to 5 parts by weight of a modified aromatic hydrocarbon-formaldehyde resin obtained by modifying with a modifier having reactivity with. 3. The resin composition according to claim 1, wherein the modifier is a saturated or unsaturated aliphatic or alicyclic carboxylic acid. 4. The resin composition according to claim 3, wherein the modifier is a saturated aliphatic hydroxycarboxylic acid having 3 to 6 carbon atoms. 5. The resin composition according to claim 1, wherein the block copolyamide resin has a polyamide block and a polyetherester block. 6. The polyamide block has 6 carbon atoms.
The above aminocarboxylic acids or their lactams and /
Alternatively, a salt of a diamine having 6 or more carbon atoms and a dicarboxylic acid is used as a constitutional unit, and the polyether ester block is a poly (alkylene oxide) glycol having a number average molecular weight of 200 to 6000 and a carbon number of 4
The resin composition according to claim 5, wherein the dicarboxylic acid of 20 to 20 is a constituent unit. 7. The aromatic polycarbonate resin is 2,
Polycarbonate resin derived from 2-bis (4-hydroxyphenyl) propane or 2,2-bis (4-
7. The resin composition according to claim 1, which is a polycarbonate copolymer derived from hydroxyphenyl) propane and another aromatic dihydroxy compound. 8. The aromatic polyester resin is selected from polymers and copolymers obtained by polycondensation reaction of terephthalic acid, isophthalic acid or its ester-forming derivative with glycols. ~ The resin composition according to 7. 9. The impact modifier is selected from acrylic acid ester-based core-shell graft copolymer, styrene-based core-shell graft copolymer, MBS resin, MABS resin, polyester-based elastomer, SBR, SEBS and polyurethane-based elastomer. The resin composition according to claim 1, which is a resin composition.