JPH05163402A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To provide the subject thermoplastic resin composition excellent in stiffness, impact resistance, electrical properties, thermal stability and weld visual appearance. CONSTITUTION:The objective thermoplastic resin composition is characterized by its composition composed of (a) 2 to 60wt.% polyamide elastomer, (b) 98 to 40wt.% styrene-based resin obtained by polymerizing an aromatic vinyl compound or a monomer mixture of an aromatic vinyl compound and another monomer copolymerizable with the aromatic vinyl compound in the presence of a rubbery polymer or without using the rubbery polymer and (c) a lithium compound in an amount of 10 to 50000ppm on lithium atom base based on the total amount of the above-mentioned (a) and (b).

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a thermoplastic resin composition having excellent rigidity, antistatic property, impact resistance, fluidity, thermal stability and weld appearance.

[0002]

2. Description of the Related Art Styrenic resins such as ABS resins are widely used in the electric and electronic fields, home electric appliances fields, automobile fields and the like because they are excellent in moldability, physical properties and mechanical properties. 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. In this method, however, the surface specific resistance value changes with time and becomes high, so that the antistatic effect does not continue. It has the drawback. As a method for improving the durability of the antistatic effect, a method has been proposed in which a polyether amide elastomer containing polyethylene glycol and polyamide as main components is blended with a styrene resin such as an ABS resin. This composition improves the antistatic sustaining effect as compared with the ABS resin containing the antistatic agent, but the antistatic effect is not yet sufficient, and the weld appearance tends to be conspicuous. Have As a method of improving these electrical characteristics, there is a method of further adding a known antistatic agent to a styrene resin containing a polyetheramide elastomer, but there is a case where thermal stability is inferior, which is preferable. Absent.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and provides a thermoplastic resin composition excellent in rigidity, impact resistance, electrical characteristics, thermal stability and weld appearance. The purpose is to provide.

[0005]

The present invention provides (a) an aromatic vinyl compound or an aromatic vinyl compound in the presence or absence of a polyamide elastomer (2 to 60% by weight) and (b) a rubbery polymer. 98-40% by weight of a styrene resin obtained by polymerizing a monomer component composed of another monomer copolymerizable with an aromatic vinyl compound (hereinafter sometimes referred to as "other monomer") [however, (A) + (b) = 100% by weight], and (c) the lithium compound is 10 to 10 in terms of lithium atom based on the total amount of the components (a) and (b).
The present invention provides a thermoplastic resin composition containing 50,000 ppm.

The polyamide elastomer (a) used in the present invention includes a hard segment (X) composed of an aminocarboxylic acid or lactam having 6 or more carbon atoms, or a nylon mn salt having m + n of 12 or more, and a polyol. Specifically, it is composed of a soft segment (Y) such as poly (alkylene oxide) glycol, and the proportion of X component in the elastomer is 10 to 95% by weight, preferably 20 to 90% by weight, more preferably 80 to 90% by weight. One by weight may be mentioned. (A)
The ratio of the X component in the polyamide elastomer is 10
If it is less than 5% by weight, the compatibility is poor, while if it exceeds 95% by weight, the antistatic property is poor, which is not preferable.

Examples of the aminocarboxylic acid or lactam having 6 or more carbon atoms or the nylon mn salt (X) having m + n ≧ 12 include ω-aminocaproic acid, ω-aminoenoic acid, ω-aminocaprylic acid, ω-aminobergonic acid and ω. An aminocarboxylic acid such as aminocapric acid, 11-aminoundecanoic acid, 12-aminododecanoic acid;
Lactams such as caprolactam and laurolactam; nylon 6,6, nylon 6,10, nylon 6,12,
Nylon 11,6, Nylon 11,10, Nylon 1
Examples thereof include nylon salts such as 2,6, nylon 11,12, nylon 12,6, nylon 12,10, nylon 12,12. Examples of the poly (alkylene oxide) glycol (Y) include polyethylene glycol, poly (1,2 and 1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, and ethylene oxide. Examples thereof include a block or random copolymer of propylene oxide and a block or random copolymer of ethylene oxide and tetrahydrofuran.

The number average molecular weight of these glycols (Y) is 200 to 6,000, preferably 250 to 4,000.
It is 0. Among these glycols (Y), polyethylene glycol is particularly preferably used because it has excellent antistatic properties. In the present invention, both terminals of the poly (alkylene oxide) glycol (Y) may be aminated or carboxylated. The bond between the component (X) and the component (Y) may be an ester bond or an amide bond corresponding to the terminal of the component (Y). A third component such as a dicarboxylic acid or a diamine can be used for this bonding.

As the (a) polyamide elastomer, an amine carboxylic acid or lactam having 6 or more carbon atoms, or a salt of a diamine and dicarboxylic acid having 6 or more carbon atoms, polyethylene glycol having a number average molecular weight of 200 to 6,000, and When a polyether ester amide composed of a dicarboxylic acid having 4 to 20 carbon atoms and having a polyether ester unit content of 10 to 95% by weight is used, a thermoplastic resin composition having further excellent antistatic properties is obtained. You can get things. this house,
The components are preferably caprolactam, 12-aminododecanoic acid and hexamethylenediamine-adipate.

The number average molecular weight of the component is 2
The polyethylene glycol has a number average molecular weight of from 0 to 6,000, preferably from 250 to 4,000, and when the number average molecular weight is within this range, one having excellent mechanical properties and antistatic properties can be obtained. Furthermore, the component dicarboxylic acid has 4 carbon atoms.
To terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-
4,4-dicarboxylic acid, diphenoxyethanedicarboxylic acid, aromatic dicarboxylic acid such as sodium 3-sulfoisophthalate, 1,4-cyclohexanedicarboxylic acid,
Aliphatic dicarboxylic acids such as 1,2-cyclohexanedicarboxylic acid and dicyclohexyl-4,4-dicarboxylic acid, aliphatic dicarboxylic acids such as succinic acid, oxalic acid, adipic acid, sebacic acid, and dodecanedicarboxylic acid, and these And the like, and terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, sebacic acid, adipic acid, and dodecanedicarboxylic acid are particularly preferably used from the viewpoint of polymerizability, color tone and physical properties. When the content of the polyether ester unit in the polyether ester amide is 10 to 95% by weight, a composition having more excellent mechanical properties and antistatic properties can be obtained.

The reduced viscosity η _SP / C of the (a) polyamide elastomer used in the present invention (0.5 g / in a formic acid solution)
100 ml, measured at 25 ° C.) is preferably 0.5-
It is 3.0. The component (a) may cause a decrease in the molecular weight due to heat deterioration during the production of the composition of the present invention and during molding, but the reduced viscosity η _SP / C in the final product.
Is preferably 0.3 or more. The above (a) polyamide elastomer may be used alone or in combination of two or more. (A) The compounding amount of the polyamide elastomer is
2 to 60% by weight in the composition of the present invention, preferably 5 to 3
It is 0% by weight, more preferably 7 to 25% by weight, particularly preferably 7 to 20% by weight. If the amount of the component (a) is less than 2% by weight, the antistatic performance is poor, whereas if it exceeds 60% by weight, the rigidity is lowered, which is not preferable.

Next, the (b) styrenic resin used in the present invention is an aromatic vinyl compound or a monomer containing an aromatic vinyl compound and another monomer in the presence or absence of a rubbery polymer. It is formed by polymerizing body components. Here, as the rubbery polymer used as the component (b),
Polybutadiene, styrene-butadiene copolymer (styrene content is preferably 5 to 60% by weight), styrene-isoprene copolymer, acrylonitrile-butadiene copolymer, ethylene-α-olefin copolymer, ethylene-α
-Olefin-polyene copolymer, acrylic rubber, butadiene-acrylic copolymer, polyisoprene, styrene-butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-butadiene block copolymer, hydrogenated butadiene Examples thereof include polymer, ethylene ionomer and the like. Among these, 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 block copolymer, a hydrogenated product of a block of a styrene polymer and a styrene-butadiene random copolymer, or a 1,2-vinyl compound of the butadiene portion. 20 bond
A hydrogenated product of a block polymer comprising a block of not more than 20% by weight and polybutadiene having a 1,2-vinyl bond of more than 20% by weight can be mentioned.

The amount of the rubbery polymer used is 0 to 90% by weight in the component (b), preferably 3 from the viewpoint of impact resistance.
˜70 wt%, more preferably 5 to 60 wt%, particularly preferably 10 to 60 wt%. The proportion of the rubbery polymer in the composition of the present invention is preferably 5 to 25% by weight, more preferably 6 to 2% from the viewpoint of impact resistance.
It is about 0% by weight.

As the aromatic vinyl compound, styrene, α-methylstyrene, methylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, pt-butylstyrene, ethylstyrene, Vinylnaphthalene, o-methylstyrene, dimethylstyrene, etc.
It is also possible to use two or more species together. Of 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 50% by weight or more.

Other monomers copolymerizable with the aromatic vinyl compound include vinyl cyan compounds such as acrylonitrile and methacrylonitrile, methyl acrylate,
Acrylic acid alkyl esters such as ethyl acrylate, propyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, alkyl methacrylate such as methyl methacrylate, ethyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate. Maleimide compounds such as esters, maleimides, N-methylmaleimides, N-ethylmaleimides, N-phenylmaleimides and N-cyclohexylmaleimides, epoxy group-containing unsaturated compounds such as glycidyl methacrylate, allyl glycidyl ether, acrylic acid, methacrylic acid, itacone Acid, unsaturated acids such as maleic acid, maleic anhydride, itaco anhydride Acids, unsaturated carboxylic acid anhydrides such as citraconic anhydride, acrylic amine, aminoethyl methacrylate, aminopropyl methacrylate, amino group-containing unsaturated compounds such as aminostyrene, 3-hydroxy-1-propene, 4-hydroxy- 1-butene, cis-
4-hydroxy-2-butene, trans-4-hydroxy-2-butene, 3-hydroxy-2-methyl-1-propene, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate and other hydroxyl group-containing unsaturated compounds, and Acrylamide, vinyl oxazoline, etc. are mentioned, and these compounds are used by 1 type (s) or 2 or more types.

A preferred monomer is a combination of at least one selected from vinyl-based monomers and maleimide-based monomers and an aromatic vinyl compound, more preferably an aromatic vinyl compound and a vinyl cyanide compound. It is a monomer mixture. In addition, the preferable ratio of the aromatic vinyl compound and the other monomer is 40 to 1 for the aromatic vinyl compound.
00% by weight, other monomers are about 60 to 0% by weight,
More preferably, it is 50 to 90/50 to 10% by weight. (Co) polymers of aromatic vinyl compounds and other monomers include those polymerized in the presence of the rubbery polymer and those polymerized in the absence thereof, but they may be used in combination. It can be used or can 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 component 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. (B) As a preferred method for producing the styrene-based resin, a monomer component containing an aromatic vinyl compound (and another monomer) and an additional substance are added in the presence of a rubbery polymer obtained by emulsion polymerization. Polymerization temperature of 30 to 150 ° C., polymerization time of 1 to 15 hours, polymerization pressure of −1.0 to 5.0 kg / cm.
Graft copolymer obtained by graft copolymerization under the conditions of ² (including ungrafted vinyl polymer)
And a vinyl polymer obtained by emulsion polymerization or solution polymerization.

The styrene-based resin (b) obtained by graft-polymerizing the monomer component in the presence of the rubbery polymer is preferable in terms of impact resistance. Also in this case,
The graft ratio is preferably 20 to 200% by weight.
(B) The intrinsic viscosity (measured at 30 ° C. in methyl ethyl ketone) of the methyl ethyl ketone soluble component of the styrene resin is
0.3 to 1.5 is preferable. The blending amount of the (b) styrene resin in the composition of the present invention is 98 to 40% by weight, preferably 95 to 70% by weight, more preferably 93 to 75% by weight, and particularly preferably 93 to 80% by weight. is there. (B)
If the blending amount of the components exceeds 98%, the antistatic performance is poor,
On the other hand, if it is less than 40% by weight, the rigidity becomes poor.

For the purpose of further improving the performance of the thermoplastic resin composition of the present invention, a compatibilizing agent that improves the compatibility between the component (a) and the component (b) can be used. As a preferable compatibilizer, a hydroxyl group, an epoxy group, a carboxyl group, an acid anhydride group, a part of the component (b),
A styrene resin obtained by copolymerizing a vinyl monomer having a functional group such as an amino group or an oxazoline group, or α-
Examples thereof include copolymers of olefin and the vinyl monomer containing the functional group. Of these functional groups, an epoxy group, a carboxyl group and a hydroxyl group are preferable, and a hydroxyl group is particularly preferable. Further, in this case, as the monomer component used in the component (b), an aromatic vinyl compound and a (meth) acrylic acid alkyl ester and / or a vinyl cyanide compound are added to the functional group-containing vinyl monomer. Combinations can be mentioned. The copolymerization amount of the functional group-containing vinyl monomer is 0.5 to 30% by weight in the styrene resin (b). The amount of the functional group-containing vinyl monomer used in the composition of the present invention is preferably 0.5 to 30% by weight, preferably 1 to 25% by weight. Particularly preferred as the compatibilizer is a hydroxyl group-containing styrene resin from the viewpoint of impact resistance and thermal stability.

Next, (c) lithium used in the present invention
Examples of the compound include LiCl, LiBr, LiI,
LiSCN, LiBF_Four, LiAsF₆, LiCl
O_Four, LiCF₃SO₃, LiC₆F₁₂SO₃, LiH
gI₂, LiAlH_Four, LiBH _Four, Li₂CO₃, L
i₃C₆H_FiveO₇・ 4H₂O, LiF, LiOH / H₂
O, LiNO₃, Li₃PO_Four, Li₂SO_Four・ H
₂O, LiB_FourO₇In addition to inorganic compounds such as
Syl group, phenol group, sulfonic acid group, phosphoric acid group, phosphorus
Uses lithium salts of organic compounds having acid groups such as acid groups
Lithium laurate as an example of these
, Lithium stearate, lithium rosinate, etc.
You can Of these lithium compounds, preferably
It is LiCl. (C) The compounding amount of the lithium compound is
Lithium atom conversion based on the total amount of components (a) and (b)
10 to 50,000 ppm in total, preferably 50 to 1
0000 ppm, more preferably 100 to 100
It is 0 ppm, and if less than 10 ppm, the antistatic property is poor.
On the other hand, if the concentration exceeds 50,000 ppm, the weld becomes conspicuous.
It tends to be fragile and the appearance is inferior.

The thermoplastic resin composition of the present invention can be used in various extruders, Banbury mixers, kneaders, rolls, etc.
Preferably, it can be obtained by kneading each component using an extruder. When kneading the respective components, the respective components may be kneaded together or may be kneaded by a multi-stage addition method.

In using the thermoplastic resin composition of the present invention, glass fibers, carbon fibers, metal fibers, glass beads, wollastonite, rock filler, calcium carbonate, talc, mica, glass flakes, kaolin, barium sulfate, Fillers such as 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 about 5 to 150 parts by weight based on 100 parts by weight of the thermoplastic resin composition.

Further, the thermoplastic resin composition of the present invention comprises
Other known flame retardants, antioxidants, plasticizers, colorants,
Lubricants and the like can be added as additives. Further, the thermoplastic resin composition of the present invention, other polymers depending on the required performance, such as polyethylene, polypropylene, polyamide, polyester, polycarbonate,
Polysulfone, polyether sulfone, polyphenylene sulfide, liquid crystal polymer, vinylidene fluoride polymer,
An ethylene-vinyl acetate copolymer or the like can be appropriately blended.

The thermoplastic resin composition of the present invention can be made into various molded articles by injection molding, sheet extrusion, vacuum molding, profile molding, foam molding or the like. The molded product obtained in this manner makes use of its excellent properties, various parts of home appliances, housings, and electric / electronic fields,
It is useful for various parts, housings and sundries in the automobile field.

[0025]

EXAMPLES The present invention will be described in more detail 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 was molded and conditioned for 7 days at 23 ° C. and a relative humidity of 50%, and then 432 manufactured by Yokogawa Hewlett-Packard Co.
The surface resistivity was measured using a 9A type super insulation resistance meter. Charge voltage and charge voltage decay half-life;
A 40 mm × 40 mm test piece was cut out, and the static voltage and static half-life of static voltage after applying the applied voltage of 10 kV for 30 seconds were measured using a static Honest meter manufactured by Shishido Electrostatics Co., Ltd.

Impact resistance : measured according to ASTM D256, thickness 1/4 ", notched, at 23 ° C. Stiffness : Flexural modulus was measured according to ASTM D790. Flowability: According to ASTM D1238, 220 ° C, load 10 kg.
The melt flow rate (MFR) was measured by. Thermal stability After being retained in an injection molding machine at a cylinder setting temperature of 250 ° C. for 10 minutes, a flat plate was prepared and the thermal stability of silver, burnt, etc. was visually evaluated according to the following evaluation criteria. ◯: Good Δ: Slightly good ×: Inferior Weld appearance A flat plate molded product having a two-point gate was molded and visually evaluated according to the following evaluation criteria. ○: Weld is inconspicuous. B: Weld is slightly noticeable. ×: Weld is conspicuous.

Reference Example (Preparation of Each Component) Preparation of Polymers (a) -1 to (a) -5 After a polymer block of nylon 6 was obtained by ring-opening polycondensation of ε-caprolactam, both were treated with adipic acid. After the terminal was made carboxylic acid, polyethylene glycol was added and polymerized to obtain a polymer (a) -1 which is a polyether ester amide elastomer. The ratio of the polyamide component of the polymer (a) -1 to the polyethylene glycol component is about 50/50.
(%), Using formic acid at 25 ° C., concentration 0.5 g / 10
The reduced viscosity measured at 0 ml was 1.50. Also,
The melting point of the polymer measured by DSC (differential thermal analysis) is 20
It was 5 ° C. The following polyether ester amide elastomer was obtained by the same method as for the polymer (a) -1.

That is, the polymer (a) -2 has a reduced viscosity of 1.00 by shortening the polymerization time of the polymer (a) -1. The polymer (a) -3 has a reduced viscosity of 2.00 by prolonging the polymerization time of the polymer (a) -1. Polymer (a) -4 has a polyamide / polyethylene glycol ratio of 40/60 (%) from polymer (a) -1. The polymer (a) -5 is a polymer obtained by replacing 25% of the polyethylene glycol used in the polymer (a) -1 with polytetramethylene glycol. Preparation of Polymers (b) -1 to (b) -10 Types of Rubbery Polymer; As the rubbery polymer used in the component (b) of the present invention, those shown in Table 1 were used.

[0030]

[Table 1]

Polymers (b) -1 to (b) -10; aromatic vinyl compounds or aromatic vinyl compounds and other monomers in the presence or absence of polymers-1 to polymer-4. Were polymerized to obtain polymers (b) -1 to (b) -10 shown in Table 2. Of these, polymers (b) -1, (b) -5,
(B) -8 to (b) -10 were obtained by emulsion polymerization, and polymers (b) -2 to (b) -4 and (b) -7 were obtained by solution polymerization.

[0032]

[Table 2]

*) The ratio of polymer-1 (40%) is in terms of solid content. Examples 1 to 18 and Comparative Examples 1 to 6 The various polymers were dried to a water content of 0.1% or less, and
The lithium compounds shown in are mixed in the mixing ratio shown in Table 3,
It was melt-kneaded and pelletized using a twin-screw extruder equipped with a vent. The pellets thus obtained were dehumidified and dried with a water content of 0.
After drying to 1% or less, the fluidity was injection-molded, and test pieces for measuring antistatic property, impact resistance and rigidity were prepared, and various physical properties were evaluated. The results are shown in Table 3.

[0034]

[Table 3]

As is clear from Table 3, the compositions of the present invention (Examples 1 to 18) have the physical properties aimed at by the present invention. In contrast, Comparative Example 1 is an example in which the amount of the lithium compound used is less than the range, and the electrification voltage and the weld appearance are inferior. Comparative Example 2 is an example in which the amount of the lithium compound used exceeds the range of the present invention, and the impact resistance, fluidity and weld appearance are poor. Comparative Example 3 is an example in which a general antistatic agent is used in place of the lithium compound, and the effect of improving the charged voltage is small, and the thermal stability and the weld appearance are poor.

Comparative Example 4 is an example in which potassium thiocyanate was used as the alkali metal compound other than the lithium compound, and the effect of improving the electrification voltage was small, and the thermal stability and the weld appearance were poor. Comparative Example 5 is an example in which the component (a) was used in a large amount exceeding the range of the present invention, and the rigidity was poor. Comparative Example 6 is a case where the amount of the component (a) used is less than the range of the present invention, and the electrification voltage is poor.

[0037]

The thermoplastic resin composition of the present invention has rigidity,
It is excellent in impact resistance, electrical characteristics, thermal stability and weld appearance, and is useful for various parts of electric home appliances, housings, and various parts of electric / electronic fields, automobile fields, housings, sundries, etc.

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[Procedure amendment]

[Submission date] March 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

Next, as the (c) lithium compound used in the present invention, for example, LiCl, LiBr, LiI,
LiSCN, LiBF ₄ , LiAsF ₆ , LiCl
O ₄ , LiCF ₃ SO ₃ , LiC ₆ F ₁₂ SO ₃ , Li
HgI ₂ , LiAlH ₄ , LiBH ₄ , Li ₂ CO ₃ ,
_{Li 3 C 6 H 5 O 7} · 4H 2 O, LiF, LiOH · H
₂ O, LiNO ₃ , Li ₃ PO ₄ , Li ₂ SO ₄ · H ₂
In addition to inorganic compounds such as O and LiB ₄ O ₇ , lithium salts of organic compounds having an acid group such as a carboxyl group, a phenol group, a sulfonic acid group, a phosphoric acid group, and a phosphorous acid group can be used. Lithium laurate, as an example,
Examples thereof include lithium stearate and lithium rosinate. Of these lithium compounds, preferably Li
It is Cl. (C) The compounding amount of the lithium compound is
10 to 50,000 ppm, preferably 50 to 1 in terms of lithium atom based on the total amount of components (a) and (b).
0000 ppm, more preferably 100 to 100
If it is 0 ppm and less than 10 ppm, the antistatic property is poor, while if it exceeds 50,000 ppm, the weld becomes prominent and the appearance is poor. The (c) lithium compound may be blended together with each component at the time of producing the thermoplastic resin composition of the present invention, or may be blended by dissolving it in a solvent. Further, the lithium compound (c) may be added during the production of the polyamide elastomer (a) and / or the styrene resin (b). As the method of adding the component (a) during the production, a method of adding each polymerization component, a method of adding during the polymerization, a method of adding after the polymerization,
And a method of adding it by dissolving it in poly (alkylene) glycol. In addition, as a method of blending the (b) styrene-based resin during production, there is a method of adding during or before and after the polymerization, but in the case of emulsion polymerization, it is lost together with the waste liquid during coagulation of the emulsion. Alternatively, it can be added as a solution to an aqueous solution or another solvent before drying. Further, the (c) lithium compound may be applied (coated), adhered, or sprinkled on resin pellets or powder or particles.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location C08L 77/00 LQS 9286-4J (72) Inventor Takeki Furuyama 2-11-24 Tsukiji Chuo-ku, Tokyo Japan Synthetic Rubber Co., Ltd.

Claims (1)

[Claims] 1. (a) Polyamide elastomer 2 to 60
% By weight, (b) a monomer component comprising an aromatic vinyl compound or an aromatic vinyl compound and another monomer copolymerizable with the aromatic vinyl compound in the presence or absence of a rubbery polymer. Styrenic resin 98-4 obtained by polymerization
0% by weight [(a) + (b) = 100% by weight],
And (c) with respect to the total amount of the components (a) and (b), the lithium compound is converted into lithium atoms in an amount of 10 to 50,
A thermoplastic resin composition containing 000 ppm.