JPH08183894A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE: To obtain a thermoplastic resin composition improved in antistatic performance and excellent in rigidity, the surface appearance of a molding, and impact strength. CONSTITUTION: This composition comprises 2-60wt.% polyamide elastomer (A) and 98-40wt.% styrene resin (B) prepared by (co)polymerizing a monomer component comprising an aromatic vinyl compound alone or together with other vinyl monomers copolymerizable therewith in the presence or absence of a rubbery polymer. The polyamide elastomer A mainly consists of a block copolymer comprising 10-90wt.% hard segments (a) comprising a polyamide component and 90-10wt.% soft segments (b) comprising a poly(alkylene oxide) glycol component [(a)+(b)=100wt.%], prepared in the presence of a potassium compound, and containing 10-50000ppm (in terms of potassium) of the potassium compound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to antistatic performance, rigidity,
The present invention relates to a thermoplastic resin composition having excellent surface appearance and impact strength of molded products.

[0002]

2. Description of the Related Art Conventionally, styrene resins such as ABS resin are excellent in molding processability, physical properties and mechanical properties, so that they are widely used in electric / electronic fields, home electric appliances fields, automobile fields, and sundries. Used in the field. However, although this styrene resin is an electrical insulator and is effective as an insulating material, it cannot leak charged electricity, dust is attached to the surface, and charged electricity interferes with electronic equipment. It has the drawback of giving.

As a method for improving these drawbacks, a method in which an antistatic agent is kneaded is generally known, but in this method, the surface specific resistance value changes with time and becomes high, so that the antistatic effect does not last. It has the drawback of As a method for improving the durability of the antistatic effect, a method has been proposed in which a polyether ester amide elastomer containing polyethylene glycol and polyamide as main components is blended with a styrene resin such as an ABS resin. This composition has an improved antistatic sustaining effect as compared with the ABS resin containing the antistatic agent, but the antistatic effect is still insufficient.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is a thermoplastic resin having improved antistatic performance and excellent rigidity, surface appearance of a molded article, and impact strength. It is intended to provide a composition.

[0005]

The present invention provides an aromatic vinyl compound or an aromatic vinyl compound in the presence or absence of (A) a polyamide elastomer of 2 to 60% by weight, and (B) a rubbery polymer. A composition containing 98 to 40% by weight of a styrene resin obtained by polymerizing a monomer component composed of another vinyl monomer copolymerizable with an aromatic vinyl compound, wherein (A) a polyamide elastomer is (A) 10 to 90% by weight of a hard segment composed of a polyamide component and 90 to 10% by weight of a soft segment (b) composed of a poly (alkylene oxide) glycol component (provided that (a) + (b) = 100% by weight). Is used as a main component of the block copolymer elastomer obtained by production in the presence of a potassium compound, and the potassium compound is contained in the elastomer. In the absence of terms of atom 10～50,000
The present invention provides a thermoplastic resin composition characterized by containing ppm.

The (A) polyamide elastomer used in the present invention is a block copolymer having (a) a polyamide component as a hard segment and (b) a poly (alkylene oxide) glycol component as a soft segment.

(A) The polyamide component used as the hard segment is not particularly limited and includes, for example, ethylenediamine, tetramethylenediamine, hexamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2,3,4 or 2,4. Aliphatic and alicyclic compounds such as 4-trimethylhexamethylenediamine, 1,3 or 1,4-bis (aminomethyl) cyclohexane, bis (p-aminocyclohexyl) methane, m-xylylenediamine and p-xylylenediamine , Or a polyamide derived from an aromatic diamine and an aliphatic, alicyclic, or aromatic dicarboxylic acid such as adipic acid, suberic acid, sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid, or isophthalic acid; caprolactam, lauryllactam, etc. Lacta Polyamides obtained by ring-opening polymerization of s; .omega.-aminocaproic acid, .omega. Aminoenan acid,
Examples thereof include polyamides derived from aminocarboxylic acids such as aminoundecanoic acid and 12-aminododecanoic acid; copolyamides thereof; and mixed polyamides thereof. Preferred (a) polyamide component is nylon 6 or nylon 6,6.

The molecular weight of the component (a) is not particularly limited, but the number average molecular weight is 500 to 10,000, particularly 500.
Those in the range of to 5,000 are preferably used for achieving the object of the present invention.

As the poly (alkylene oxide) glycol component used as the (b) soft segment, polyethylene glycol, poly (1,2 or 1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, Examples include poly (hexamethylene oxide) glycol, polyethylene oxide, polypropylene oxide, block or random copolymers of ethylene oxide and propylene oxide, block or random copolymers of ethylene oxide and tetrahydrofuran, and both ends thereof are aminated. It may be carboxylated or epoxidized before use. Among these components (b), polyethylene glycol is preferable from the viewpoint of antistatic property.

The component (b) has a number average molecular weight of preferably 200 to 20,000, more preferably 30.
0 to 10,000, particularly preferably 300 to 4,000
Is.

The ratio of the component (a) to the component (b) in the (A) polyamide elastomer of the present invention is (a) /
(B) = 90 to 10/10 to 90% by weight, preferably 8
0-20 / 20-80% by weight, more preferably 70-
30/30 to 70% by weight. If the amount of component (b) exceeds 90% by weight, the surface appearance, rigidity and impact strength of the molded product will be poor, whereas if it is less than 10% by weight the antistatic performance will be poor.

The molecular weight of the (A) polyamide elastomer of the present invention is not particularly limited, but the reduced viscosity (η
_{sp / c} ) (0.5 g / 100 ml in formic acid solution, measured at 25 ° C.) is preferably 1.0 to 3.0, more preferably 1.5 to 2.5.

The polyamide elastomer (A) used in the present invention can be produced by using a known polymerization method and a known polymerization catalyst. The preferred polymerization method is hot melt polymerization. As a specific example, after polymerizing the polyamide component as the component (a), a dicarboxylic acid compound is added, both ends of the polyamide component are carboxylated, and polyethylene glycol as the component (b) is added and polymerized to obtain a polyamide elastomer. Examples thereof include a method for obtaining a polyamide elastomer, a method for obtaining a polyamide elastomer by batch-polymerizing a polyamide-forming component, an excess dicarboxylic acid compound, and polyethylene glycol in specified amounts. The above (A) polyamide elastomer may be used alone or in combination of two or more.

Further, the potassium compound used in the present invention can improve the antistatic performance without lowering the impact strength of the thermoplastic resin composition of the present invention. As a method of improving the antistatic performance, which is one of the objects of the present invention, there is a method of adding a lithium compound or a sodium compound, but in that case, the impact strength of the thermoplastic resin composition of the present invention is poor.

Examples of the potassium compound include organic acids, perchloric acid, thiocyanic acid, sulfuric acid, carbonic acid, hydrogen halides,
Phosphoric acid, a potassium salt of boric acid and the like, which may be used alone or in combination of two or more. Specific examples of this potassium compound include CH ₃ COOK, KClO ₄ ,
KSCN, K ₂ SO ₄ , K ₂ CO ₃ , K ₃ PO ₄ , K ₂
B ₄ O ₇ , KCl, KBr, KI and the like can be mentioned, and KSCN and KCl are particularly preferable.

This potassium compound must be present during the production of the (A) polyamide elastomer,
For example, the object of the present invention cannot be achieved even if the elastomer is added to an injection molding machine during molding. Here, in order to produce a polyamide elastomer in the presence of a potassium compound, the potassium compound may be added all at once or before the polymerization of the elastomer, during the polymerization, or before the separation / collection of the elastomer after the polymerization. . Further, as a method of adding the potassium compound, it may be added as it is, or may be added after being dissolved in a polymerization component in advance.
Further, it may be dissolved in another solvent and added.

The amount of the potassium compound used is 10 to 50,000 ppm, preferably 20 to 30,0 in terms of potassium atom in the polyamide elastomer (A) of the present invention.
00 ppm, more preferably 50 to 1,000 ppm
Is. If the amount used is less than 10 ppm, the antistatic performance will be poor, while if it exceeds 50,000 ppm, the surface appearance of the molded product will be poor.

The amount of component (A) used in the thermoplastic resin composition of the present invention is 2 to 60% by weight, preferably 5%.
-30% by weight, more preferably 7-25% by weight, particularly preferably 7-20% by weight. Below 2% by weight,
Antistatic performance is inferior. On the other hand, if it exceeds 60% by weight, rigidity and impact strength decrease, which is not preferable.

Next, as the rubbery polymer used in the styrene resin (B) of the present invention, polybutadiene, styrene-butadiene copolymer (styrene content is preferably 5 to 60% by weight), styrene-isoprene copolymer. Coalesce, acrylonitrile-butadiene copolymer, ethylene-α-olefin copolymer, ethylene-α-olefin-polyene copolymer, acrylic rubber, butadiene-acrylic copolymer, polyisoprene, silicone rubber, styrene-butadiene block copolymer Examples thereof include polymers, styrene-isoprene block copolymers, hydrogenated styrene-butadiene block copolymers, hydrogenated butadiene-based polymers and ethylene-based ionomers. Among them, the styrene-butadiene block copolymer and the styrene-isoprene block copolymer include those having an AB type, ABA type, taper type, or radial teleblock type structure. The hydrogenated butadiene-based polymer is a hydrogenated product of the above block copolymer, a hydrogenated product of a block of a styrene polymer and a styrene-butadiene random copolymer, and 1,2-vinyl of the butadiene portion. 20% by weight of binding
Examples include hydrogenated products of block polymers composed of the following blocks and polybutadiene having a 1,2-vinyl bond content exceeding 20% by weight. The amount of the rubbery polymer used is not particularly limited, but is preferably 3 to 3 in the (B) styrene resin.
It is 70% by weight.

As the aromatic vinyl compound used in the styrene resin (B), styrene, α-methylstyrene, methylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, These are pt-butylstyrene, ethylstyrene, vinylnaphthalene, o-methylstyrene, dimethylstyrene, etc. These may be used alone or in combination of two or more. Among these aromatic vinyl compounds, styrene is preferably used as the aromatic vinyl compound. Even when two or more aromatic vinyl compounds are used in combination, it is preferable to use styrene in a proportion of 40% by weight or more.

Other vinyl monomers copolymerizable with the aromatic vinyl compound include vinyl cyan compounds such as acrylonitrile and methacrylonitrile, methyl acrylate, ethyl acrylate and propyl acrylate.
Butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, alkyl acrylates such as cyclohexyl acrylate, methacrylic acid alkyl esters such as methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, maleimide, N- Methylmaleimide, N-ethylmaleimide, N-phenylmaleimide,
Maleimide compounds such as N-cyclohexylmaleimide, epoxy group-containing unsaturated compounds such as glycidyl methacrylate and allyl glycidyl ether, acrylic acid,
Unsaturated acids such as methacrylic acid, itaconic acid, maleic acid, etc., unsaturated carboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, acrylic amine, aminoethyl methacrylate, aminopropyl methacrylate, aminostyrene, etc. An amino group-containing unsaturated compound,
3-hydroxy-1-propene, 4-hydroxy-1-
Butene, cis-4-hydroxy-2-butene, trans-4-hydroxy-2-butene, 3-hydroxy-2-
Examples thereof include a hydroxyl group-containing unsaturated compound such as methyl-1-propene, 2-hydroxyethyl acrylate, and 2-hydroxyethyl methacrylate, and acrylamide and vinyloxazoline, which may be used alone or in combination of two or more.

Preferred as the above-mentioned monomer component (aromatic vinyl compound or aromatic vinyl compound and other vinyl-based monomers copolymerizable therewith) are aromatic vinyl compound and cyan from the viewpoint of impact resistance. It is a monomer mixture comprising a vinyl chloride compound, and a preferable ratio is aromatic vinyl compound / vinyl cyanide compound = 80 to 60/20.
It is 40% by weight. (Co) polymers of aromatic vinyl compounds and other vinyl monomers include those polymerized in the presence of the above rubbery polymer and those polymerized in the absence thereof, but these are mixed and used. It can also be used alone.

The styrene resin (B) used in the present invention is produced by emulsion polymerization, solution polymerization, suspension polymerization or the like of the above monomer components in the presence or absence of a rubbery polymer. At this time, a polymerization initiator used for polymerization,
As the molecular weight modifier, emulsifier, dispersant, solvent, etc., those usually used in these polymerization methods can be used as they are. As a preferred method of producing a styrene resin, a monomer component composed of an aromatic vinyl compound (and other vinyl monomer) and an additional monomer are added in the presence of a rubbery polymer obtained by emulsion polymerization. Using an emulsifier and a polymerization initiator, the polymerization temperature is generally 30 to 150 ° C., the polymerization time is 1 to 15 hours, and the polymerization pressure is −1.0 to 5.0 kg / c.
Graft copolymer obtained by graft copolymerization under the condition of m ² (including ungrafted vinyl polymer)
And a vinyl-based polymer obtained by emulsion polymerization or solution polymerization.

As the styrene resin (B), the one obtained by graft-polymerizing the monomer component in the presence of the rubbery polymer in this way is preferable from the viewpoint of impact resistance. Also in this case,
The graft ratio is preferably 20 to 200% by weight.
(B) The intrinsic viscosity of the methyl ethyl ketone soluble component of the styrene resin (measured in methyl ethyl ketone at 30 ° C.) is
0.3 to 1.5 is preferable.

Since the (A) polyamide elastomer of the present invention and the (B) styrene resin are generally poor in compatibility, it is preferable to use a compatibilizing agent. As a preferable compatibilizer, a vinyl-based monomer containing a functional group such as a hydroxyl group, an epoxy group, a carboxyl group, an acid anhydride group, an amino group, an oxazoline group, etc., in a part of the (B) styrene resin of the present invention Examples thereof include a styrene-based resin obtained by copolymerizing the above, or a copolymer of an α-olefin and the functional group-containing vinyl monomer. Of these functional groups, an epoxy group, a carboxyl group and a hydroxyl group are preferable, and a hydroxyl group is particularly preferable.

When a compatibilizing agent containing such a functional group is used, an aromatic vinyl compound and (meth) acrylic acid alkyl ester and / or vinyl cyanide are used as the monomer component in the styrene resin. It is preferable to use a combination of the above-mentioned functional group-containing vinyl monomer and the compound. The copolymerization amount of the functional group-containing vinyl monomer is 0.5 to 30% by weight in the styrene resin. The amount of the functional group-containing vinyl monomer used is preferably 0.5 to 30% by weight in the composition of the present invention.

As the styrene resin (B) of the present invention, the styrene resin obtained in the presence of the rubbery polymer, the styrene resin obtained in the absence of the rubbery polymer, and the above It also includes a combination of styrene resins used as a compatibilizer in an arbitrary ratio.

The amount of the styrene resin (B) used in the thermoplastic resin composition of the present invention is 98 to 40% by weight,
Preferably 95-70% by weight, more preferably 93-
75% by weight, particularly preferably 93 to 80% by weight.
If it exceeds 98% by weight, the antistatic performance is poor, while 40
If it is less than weight%, the rigidity is lowered, which is not preferable.

In using the thermoplastic resin composition of the present invention, glass fiber, carbon fiber, metal fiber, glass beads,
Glass powder, wollastonite, rock filler, calcium carbonate, talc, mica, glass flakes, kaolin,
Fillers such as barium sulfate, graphite, molybdenum disulfide, magnesium oxide, zinc oxide whiskers and potassium titanate whiskers can be used alone or in combination. Among these fillers, glass fibers and carbon fibers preferably have a fiber diameter of 6 to 60 μm and a fiber length of 30 μm or more. These fillers are used in an amount of 2 to 150 parts by weight based on 100 parts by weight of the composition of the present invention. In addition, in the composition of the present invention, other low molecular type antistatic agents, known antibacterial and antifungal agents, flame retardants,
Antioxidants, plasticizers, colorants, lubricants and the like can also be added as additives.

Further, the thermoplastic resin composition of the present invention may be blended with other thermoplastic resins depending on the required performance. Examples of the other thermoplastic resin include olefin resins such as polyethylene and polypropylene, polyamide resin, thermoplastic polyester resin, polyacetal, polycarbonate, polysulfone, polyether sulfone, polyphenylene ether, polyphenylene sulfide, liquid crystal polymer, fluorine resin, ethylene. -Vinyl acetate copolymers, vinyl chloride resins and the like can be mentioned, and these can be used alone or in combination of two or more kinds.

The thermoplastic resin composition of the present invention can be used in various extruders, Banbury mixers, kneaders, rolls, etc.
It can be preferably obtained by kneading each component using an extruder. When kneading each component, each component may be kneaded together or may be kneaded by a multi-stage addition method. The thermoplastic resin composition of the present invention, injection molding, sheet extrusion, vacuum molding, modified shape,
Various molded products can be formed by foam molding.
The molded product obtained in this way makes use of its excellent properties to make various parts of home appliances, housings, and electrical / electrical components.
It is useful for various parts and miscellaneous goods in the fields of electronics and automobiles.

Preferred embodiments of the present invention are, for example, the following (1) to (8). (1) (A) constitutes a polyamide elastomer (a)
A thermoplastic resin composition in which the polyamide component is nylon 6 and / or nylon 6,6. (2) (A) constitutes a polyamide elastomer (a)
The number average molecular weight of the polyamide component is 500 to 10,000.
Which is a thermoplastic resin composition. (3) (A) constitutes a polyamide elastomer (b)
A thermoplastic resin composition in which the poly (alkylene oxide) glycol component is polyethylene glycol. (4) (A) constitutes a polyamide elastomer (b)
A thermoplastic resin composition in which the number average molecular weight of the poly (alkylene oxide) glycol component is 200 to 20,000.

(5) The ratio of the component (a) to the component (b) constituting the (A) polyamide elastomer is (a) /
(B) = 90 to 10/10 to 90% by weight of the thermoplastic resin composition. (6) The molecular weight of the polyamide elastomer (A) has a reduced viscosity (η _{sp / c} ) (0.5 g / 100 ml in a formic acid solution,
A thermoplastic resin composition having a value of 1.0 to 3.0 at 25 ° C.). (7) The potassium compound is KSCN and / or KCl
Which is a thermoplastic resin composition. (8) A thermoplastic resin composition in which the styrene resin (B) is an ABS resin.

[0034]

EXAMPLES The present invention will be described more specifically below with reference to examples. In the examples, parts and% are based on weight unless otherwise specified. In addition, various measurements in the examples were measured according to the following.

Antistatic surface specific resistance: A disc having a diameter of 100 mm and a thickness of 2 mm is molded and is 23 ° C.
After conditioning for 7 days at a relative humidity of 50%, the surface resistivity was measured using a Yokogawa Hewlett-Packard Co., Ltd. model 4329A, super insulation resistance meter. Charged voltage A 40 mm × 40 mm test piece was cut out from the above disc, and a charged voltage after applying for 30 seconds at an applied voltage of 10 kV was measured using a static Honest meter manufactured by Shishido Electrostatics. Rigidity The flexural modulus (flexural modulus) was measured according to ASTM D790.

Surface appearance of molded product A flat plate was molded using an injection molding machine, and the surface appearance of the molded product was visually evaluated according to the following evaluation criteria. ◯: Smooth and good. X: There is unevenness, unevenness, etc. on the surface of the molded product and it is defective. Impact strength injection molded flat plate 1/2 "φ, tip R 1 /
The breaking energy when the flat plate was punched with a 2 ″ striking rod at a speed of 3.5 m / sec was measured and used as the impact strength.

Reference Example (Preparation of Each Component) Polymer A-1 Stainless steel autoclave was charged with ε-caprolactam 1
05 parts, adipic acid 17.1 parts, and water 6 parts were charged, and after nitrogen substitution, the mixture was heated and stirred at 220 ° C. under pressure and closed for 4 hours, and an acid value having a carboxyl group at the molecular weight end was 11
117 parts of 0 polyamide oligomer were obtained. Next, 175 parts of polyethylene oxide glycol having a number average molecular weight of 1,500, 0.5 part of tetrabutyl titanate, and 0.5 part of potassium chloride were added, and polymerization was carried out for 5 hours at 245 ° C. under a reduced pressure of 1 mmHg or less, A viscous polymer was obtained.

This polymer was taken out as a strand on a belt, pelletized, and dried to a water content of 0.1% or less to obtain a polyetheresteramide elastomer (polymer A-1). The weight ratio of the (a) polyamide component and the (b) poly (alkylene oxide) glycol component of this product was (a) / (b) = 40/60. Also, reduced viscosity (η _{sp / c} ) (0.5 g / 10 in formic acid solution)
0 ml, measured at 25 ° C) was 2.10. Furthermore, the amount of potassium was 900 ppm in terms of potassium atom. The results are shown in Table 1.

Polymer A-2 A polymer except that 0.3 part of Irganox 1010 manufactured by Ciba-Geigy Co., Ltd. as an antioxidant was charged at the same time when ε-caprolactam and adipic acid were charged in the production of the polyamide elastomer. A polyamide elastomer was obtained in the same manner as in A-1. The results are shown in Table 1.

Polymers A-3 to 13 : Polyamide elastomer, which is a polyamide elastomer in the same manner as the polymer A-1, except that the ratio of the components (a) and (b), the polymerization time, the amount and type of the potassium compound are changed. Combined A-3-1
3 was obtained. The results are shown in Table 1. The polymer A-9 is
In Polymer A-1, the polyamide elastomer produced without adding KCl was added with 900 p in terms of potassium atom.
It is a polyamide elastomer obtained by kneading potassium chloride with a twin-screw extruder so as to obtain pm.

[0041] except that LiCl as lithium compound in place of the polymer A-14 KCl was blended so that 100ppm lithium atoms terms of, to obtain a polymer A-14 in the same manner as Polymer A-1.
The results are shown in Table 1.

[0042]

[Table 1]

* 1) When potassium chloride is added later during kneading using a twin-screw extruder. * 2) Amount converted to lithium atom

Rubbery Polymers 1 to 4 (B) As the rubbery polymers used for the styrene resin, those shown in Table 2 below were used.

[0045]

[Table 2]

Styrene-based resins B-1 to B-10 In the presence or absence of the rubbery polymers 1 to 4, an aromatic vinyl compound or a unit amount of an aromatic vinyl compound and another vinyl-based monomer. The body components were polymerized to obtain polymers B-1 to B-10 shown in Table 3. Of these, resins B-1 and B-
5, B-8 to B-10 are emulsion polymerization, and the polymer B-2
-B-4 and B-7 were obtained by solution polymerization.

[0047]

[Table 3]

*) The ratio of polymer-1 (40%) is in terms of solid content. Examples 1 to 15 and Comparative Examples 1 to 8 The above-mentioned various polymers / resins were dried to a water content of 0.1% or less, mixed according to the formulation shown in Tables 4 to 6, and then a biaxial extruder with a vent was used. , Melted and kneaded into pellets. The obtained pellets were dried with a dehumidifying dryer to a water content of 0.1% or less, and antistatic performance, rigidity, surface appearance of molded articles, and test pieces for measuring impact strength were prepared, and various physical properties were evaluated. The results are shown in Tables 4-6.

[0049]

[Table 4]

[0050]

[Table 5]

[0051]

[Table 6]

As is clear from Tables 4-5, Examples 1-
No. 15 relates to the thermoplastic resin composition of the present invention and is excellent in antistatic performance, rigidity, surface appearance of molded products and impact strength. On the other hand, as is clear from Table 6, in Comparative Example 1, the potassium compound as the component (A) was not added during the polymerization but was compounded afterwards, and was not present during the production of the polyamide elastomer, so that the charging was not performed. Inferior in prevention performance, surface appearance of molded products, and impact strength. Comparative Example 2 is an example in which the amount of the polyamide component in the component (A) of the present invention is out of the range of the present invention and the amount of the polyether component is small, and the antistatic performance is poor.

Comparative Example 3 is an example in which the amount of the polyamide component in the component (A) of the present invention is out of the range of the present invention and the amount of the polyether component is large, and the rigidity, the surface appearance of the molded article and the impact strength are poor. . Comparative Example 4 is a case where the amount of the potassium compound used in the component (A) of the present invention is outside the range of the present invention, and the antistatic performance is poor. Comparative Example 5 is (A) of the present invention.
This is the case where the amount of the potassium compound used in the component is out of the range of the present invention, and the surface appearance and impact strength of the molded product are poor.

Comparative Example 6 is an example in which a lithium compound was used in place of the potassium compound in the production of the component (A) of the present invention, and the impact strength was poor. Comparative Example 7 is an example in which the amount of the component (A) used in the present invention is large outside the range of the present invention and the amount of component (B) used is small outside the range of the present invention.
The surface appearance and impact strength of molded products are inferior. In Comparative Example 8, the amount of the component (A) used in the present invention was less than the range of the present invention,
This is an example in which the amount of the component (B) used is outside the scope of the present invention,
Inferior antistatic performance.

[0055]

EFFECT OF THE INVENTION The thermoplastic resin composition of the present invention is excellent in antistatic performance, rigidity, surface appearance of molded products and impact strength, and is useful for various parts of electric home appliances, housings, and electric / electronic fields,
It is useful for various parts and miscellaneous goods in the automobile field.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Senda 1-11, Hitotsubashi Honmachi, Higashiyama-ku, Kyoto City, Kyoto Prefecture Sanyo Chemical Industry Co., Ltd.

Claims (1)

[Claims] 1. (A) Polyamide elastomer 2-60
%, (B) A monomer comprising an aromatic vinyl compound or an aromatic vinyl compound in the presence or absence of a rubbery polymer and another vinyl monomer copolymerizable with the aromatic vinyl compound. A composition containing 98 to 40% by weight of a styrene resin obtained by polymerizing the components, wherein (A) the polyamide elastomer is (a) 10 to 90% by weight of a hard segment comprising a polyamide component, and (b) a poly ( 90% to 10% by weight of a soft segment composed of an alkylene oxide) glycol component (where (a) + (b) = 100
% By weight, and using the block copolymer elastomer obtained by production in the presence of a potassium compound as a main component,
A thermoplastic resin composition, wherein the elastomer contains a potassium compound in an amount of 10 to 50,000 ppm in terms of potassium atom.