JPH11293083A - Thermoplastic resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition having good compatibility with a softening agent and excellent in thermal stability and mechanical strength by mixing an isobutylene-based block copolymer, a polyolefinic resin and a softening agent. SOLUTION: The titled composition comprises 100 pts.wt. of an isobutylene- based block copolymer comprising a polymer block consisting mainly of isobutylene and a polymer block consisting mainly of a monomer component other than isobutylene; 5-400 pts.wt. of a polyolefinic resin; and 5-1,000 pts.wt. of a softening agent. The monomer component consisting mainly of a monomer other than isobutylene is preferably one consisting mainly of an aromatic vinyl monomer from the viewpoint of the balance between properties of the polymer and polymerization behavior and so on. The preferred aromatic vinyl monomers are styrene, α-methylstyrene, p-methylstyrene, indene and the like. And as the polyolefinic resin are preferable a polyethylenic resin and a polypropylenic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a thermoplastic resin composition containing a specific isobutylene-based block copolymer, a polyolefin-based resin and a softener. The thermoplastic resin composition of the present invention has good compatibility with a softener, and has excellent heat resistance and mechanical strength, so it is used for food, daily necessities, toys / exercise tools, stationery,
Automotive interior / exterior applications, civil engineering / architectural applications such as civil engineering sheets / waterproof sheets / gaskets, AV / home appliance applications, OA / office equipment applications, clothing / footwear applications, textile applications, medical applications such as various catheters / containers / caps, It can be used for sanitary products such as disposable diapers and sanitary products, packaging and transportation materials, and wire applications such as wire coating, cables, connectors and plugs.

[0002]

2. Description of the Related Art Molded articles made of a thermoplastic resin are widely used in automobile parts, home electric appliance parts, toys, sporting goods, daily necessities, industrial parts and the like. Among them, polyolefin-based resins are used as a wide range of molded articles because of their excellent balance between cost, moldability and physical properties.

On the other hand, in recent years, thermoplastic elastomers, which are rubber-like soft materials and do not require a vulcanization step and have the same moldability as thermoplastic resins, have been receiving attention. Currently, such thermoplastic elastomers include polyolefins,
Various polymers such as polyurethane, polyester, and polystyrene have been developed and are commercially available. These thermoplastic elastomers may be used alone, but thermoplastic resin compositions in which various thermoplastic resins and thermoplastic elastomers are combined are being studied in order to meet various needs of users.

In particular, a thermoplastic resin composition comprising a polyolefin resin, a polystyrene elastomer, and a softener has been widely used as a material having a good balance of hardness, moldability and the like. However, conventional thermoplastic resin compositions of polyolefin-based resins and polystyrene-based elastomers cannot be said to have sufficient heat resistance stability, and may have insufficient compatibility with softeners. There was a problem that occurs.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a thermoplastic resin composition which has good compatibility with a softener, and is excellent in heat stability and mechanical strength.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a thermosetting resin containing a specific isobutylene-based block copolymer, a polyolefin-based resin, and a softener is contained. The present inventors have found that a plastic resin composition solves the above problems, and have accomplished the present invention.

That is, the present invention provides (a) 100 parts by weight of an isobutylene-based block copolymer comprising a polymer block containing isobutylene as a main component and a polymer block containing a monomer component not containing isobutylene as a main component; ) 5 to 400 parts by weight of polyolefin resin, (c) 5 to 10 softeners
The present invention relates to a thermoplastic resin composition comprising 100 parts by weight.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The (a) isobutylene-based block copolymer of the present invention has a polymer block containing isobutylene as a main component and a polymer block containing a monomer component not containing isobutylene as a main component. Is not particularly limited as long as it is, for example, a block copolymer having a linear, branched, or star-like structure, a diblock copolymer, a triblock copolymer, a multiblock copolymer, or the like. Either can be selected. Preferred block copolymers include:
From the viewpoint of the balance of physical properties and the absorbency of the softener, a polymer block comprising a monomer component containing no isobutylene as a main component-
Isobutylene-based polymer block-Triblock copolymer consisting of a polymer block consisting of a monomer component not containing isobutylene as a main component, and polymer block-isobutylene consisting of a monomer component containing no isobutylene as a main component Diblock copolymer composed of a polymer block composed mainly of styrene, a polymer block composed of a monomer component not composed mainly of isobutylene and a star having three or more arms composed of a polymer block composed mainly of isobutylene Block copolymers and the like. These are the desired physical properties
One or more of them can be used in combination to obtain moldability.

The monomer component not containing isobutylene as a main component of the present invention refers to a monomer component having an isobutylene content of 30% by weight or less. The content of isobutylene in the monomer component containing no isobutylene as a main component is preferably 10% by weight or less, more preferably 3% by weight or less. The monomer other than isobutylene in the monomer component not containing isobutylene as the main component of the present invention is not particularly limited as long as it is a monomer component capable of cationic polymerization, but is not limited to aliphatic olefins, aromatic vinyls, Examples include monomers such as dienes, vinyl ethers, silanes, vinyl carbazole, β-pinene, acenaphthylene and the like. These are used alone or in combination of two or more.

The aliphatic olefin monomers include ethylene, propylene, 1-butene, 2-methyl-1-butene, 3-methyl-1-butene, pentene, hexene, cyclohexene, and 4-methyl-1-pentene. , Vinylcyclohexane, octene, norbornene and the like.
Styrene, o-, m-
Or p-methylstyrene, α-methylstyrene, β-methylstyrene, 2,6-dimethylstyrene, 2,4-dimethylstyrene, α-methyl-o-methylstyrene, α
-Methyl-m-methylstyrene, α-methyl-p-methylstyrene, β-methyl-o-methylstyrene, β-methyl-m-methylstyrene, β-methyl-p-methylstyrene, 2,4,6- Trimethylstyrene, α-methyl-2,6-dimethylstyrene, α-methyl-2,4-dimethylstyrene, β-methyl-2,6-dimethylstyrene, β-methyl-2,4-dimethylstyrene, o-, m
-Or p-chlorostyrene, 2,6-dichlorostyrene, 2,4-dichlorostyrene, α-chloro-o-chlorostyrene, α-chloro-m-chlorostyrene, α-chloro-p-chlorostyrene, β- Chloro-o-chlorostyrene, β-chloro-m-chlorostyrene, β-chloro-p-chlorostyrene, 2,4,6-trichlorostyrene, α-chloro-2,6-dichlorostyrene, α-chloro-2 , 4-Dichlorostyrene, β-chloro-2,6-
Dichlorostyrene, β-chloro-2,4-dichlorostyrene, o-, m- or pt-butylstyrene, o-,
m- or p-methoxystyrene, o-, m- or p-chloromethylstyrene, o-, m- or p-bromomethylstyrene, a styrene derivative substituted with a silyl group, indene, vinylnaphthalene and the like.

Examples of the diene monomer include butadiene, isoprene, hexadiene, cyclopentadiene, cyclohexadiene, dicyclopentadiene, divinylbenzene, and ethylidene norbornene. Examples of the vinyl ether monomer include methyl vinyl ether, ethyl vinyl ether, (n-, iso) propyl vinyl ether, (n-, sec-, tert-, iso) butyl vinyl ether, methyl propenyl ether, ethyl propenyl ether, and the like.

Examples of the silane compound include vinyltrichlorosilane, vinylmethyldichlorosilane, vinyldimethylchlorosilane, vinyldimethylmethoxysilane, vinyltrimethylsilane, divinyldichlorosilane, divinyldimethoxysilane, divinyldimethylsilane, 1,3-
Examples thereof include divinyl-1,1,3,3-tetramethyldisiloxane, trivinylmethylsilane, γ-methacryloyloxypropyltrimethoxysilane, and γ-methacryloyloxypropylmethyldimethoxysilane.

The monomer component not containing isobutylene as a main component of the present invention is preferably a monomer component containing an aromatic vinyl monomer as a main component in view of the balance between physical properties and polymerization characteristics. The aromatic vinyl-based monomer of the present invention indicates a monomer component having a content of aromatic vinyl-based monomer of 60% by weight or more, preferably 80% by weight or more. As the aromatic vinyl monomer, styrene, α-methylstyrene, p
1 selected from the group consisting of methylstyrene and indene
It is preferable to use at least one kind of monomer, and it is particularly preferable to use styrene, α-methylstyrene, or a mixture thereof in terms of cost.

The monomer component of the present invention containing isobutylene as a main component may or may not contain a monomer other than isobutylene. Usually, isobutylene contains 60% by weight or more, preferably 80% by weight. It is a monomer component contained by weight or more. The monomer other than isobutylene is not particularly limited as long as it is a monomer capable of cationic polymerization, and examples thereof include the above-mentioned monomers.

The ratio of the polymer block containing isobutylene as a main component and the polymer block containing a monomer component not containing isobutylene as a main component is not particularly limited.
From the viewpoint of various physical properties, the polymer block containing isobutylene as a main component is 95 to 40% by weight, and the polymer block containing a monomer component not containing isobutylene as a main component is 5 to 6%.
It is preferably 0% by weight, and 85 to 50% by weight of a polymer block containing isobutylene as a main component, and 15 to 50% by weight of a polymer block containing a monomer component not containing isobutylene as a main component. Particularly preferred.

The number average molecular weight of the isobutylene-based block copolymer is not particularly limited, but is preferably from 30,000 to 500,000, and more preferably from 50,000 to 400,000 in view of fluidity, processability, physical properties and the like. Particularly preferred. If the number average molecular weight of the isobutylene-based block copolymer is lower than the above range, bleed out of the softener tends to occur and mechanical properties are not sufficiently expressed, while if it exceeds the above range, fluidity Disadvantageous in terms of workability.

The method for producing the isobutylene-based block copolymer is not particularly limited. For example, a monomer containing isobutylene as a main component and isobutylene are mixed in the presence of a compound represented by the following general formula (1). It is obtained by polymerizing a monomer component that is not the main component. (CR ¹ R ² X) nR ³ (1) wherein X is a halogen atom, a substituent selected from an alkoxy group having 1 to 6 carbon atoms or an acyloxy group, and R ¹ and R ² are each a hydrogen atom or 1 carbon atom. And R ¹ and R ² may be the same or different in the monovalent hydrocarbon groups of Nos. 6 to 6, R ³ is a polyvalent aromatic hydrocarbon group or a polyvalent aliphatic hydrocarbon group, and n is 1 6 represents a natural number. The compound represented by the general formula (1) serves as an initiator, and is considered to generate a carbon cation in the presence of a Lewis acid or the like and serve as a starting point of cationic polymerization. Examples of the compound of the general formula (1) used in the present invention include the following compounds.

(1-Chloro-1-methylethyl) benzene [C ₆ H ₅ C (CH ₃ ) ₂ Cl], 1,4-bis (1-chloro-1-methylethyl) benzene [1,4-Cl (C
H ₃ ) ₂ CC ₆ H ₄ C (CH ₃ ) ₂ Cl], 1,3-bis (1
-Chloro-1-methylethyl) benzene [1,3-Cl
_{(CH 3) 2 CC 6 H} 4 C (CH 3) 2 Cl ], 1,3,5
Tris (1-chloro-1-methylethyl) benzene _{[1,3,5- (ClC (CH 3) 2} ) 3 C 6 H 3 ], 1,
3-bis (1-chloro-1-methylethyl) -5- (t
ert- butyl) benzene _{[1,3- (C (CH 3) 2} C
_{l) 2 -5- (C (CH} 3) 3) C 6 H 3 ] Particularly preferred bis Among these (1-chloro -1
-Methylethyl) benzene [C ₆ H ₄ (C (CH ₃ ) ₂ C
l) ₂ ] and tris (1-chloro-1-methylethyl) benzene [(ClC (CH ₃ ) ₂ ) ₃ C ₆ H ₃ ]. [Note that bis (1-chloro-1-methylethyl) benzene is
Bis (α-chloroisopropyl) benzene, bis (2-
Also known as chloro-2-propyl) benzene or dicumyl chloride, tris (1-chloro-1-methylethyl) benzene is tris (α-chloroisopropyl)
Also called benzene, tris (2-chloro-2-propyl) benzene or tricumyl chloride.]

When the isobutylene-based block copolymer is produced by polymerization, a Lewis acid catalyst may be additionally used. Such a Lewis acid may be any as long as it can be used for cationic polymerization, such as TiCl ₄ , TiBr ₄ ,
BCl ₃ , BF ₃ , BF ₃ OEt ₂ , SnCl ₄ , SbCl ₅ , SbF ₅ , WC
_{l 6, TaC l 5, VCl} 5, FeCl 3, ZnBr 2, AlCl 3, AlBr
Metal halides such as ₃ ; organic metal halides such as Et ₂ AlCl and EtAlCl ₂ can be suitably used. Among them, TiCl ₄ , BCl ₃ , and SnCl ₄ are preferable in view of the ability as a catalyst and industrial availability. The amount of the Lewis acid to be used is not particularly limited, but can be set in consideration of the polymerization characteristics or the polymerization concentration of the monomer used. Usually, it can be used in an amount of 0.1 to 100 molar equivalents, preferably 1 to 50 molar equivalents, relative to the compound represented by the general formula (1).

In the polymerization of the isobutylene-based block copolymer, an electron donor component can be further added, if necessary. This electron donor component is considered to have an effect of stabilizing the growing carbon cation during cation polymerization, and the addition of the electron donor produces a polymer whose structure with a narrow molecular weight distribution is controlled. The electron donor component that can be used is not particularly limited,
Examples include pyridines, amines, amides, sulfoxides, esters, and metal compounds having an oxygen atom bonded to a metal atom.

The polymerization of the isobutylene-based block copolymer can be carried out in an organic solvent as required, and the organic solvent can be used without any particular limitation as long as it does not substantially inhibit cationic polymerization. Specifically, methyl chloride,
Halogenated hydrocarbons such as dichloromethane, chloroform, ethyl chloride, dichloroethane, n-propyl chloride, n-butyl chloride and chlorobenzene; alkylbenzenes such as benzene, toluene, xylene, ethylbenzene, propylbenzene and butylbenzene; ethane, propane and butane Pentane, hexane, heptane, octane, nonane, linear aliphatic hydrocarbons such as decane; 2-methylpropane, 2-methylbutane, 2,
Branched aliphatic hydrocarbons such as 3,3-trimethylpentane and 2,2,5-trimethylhexane; cycloaliphatic hydrocarbons such as cyclohexane, methylcyclohexane and ethylcyclohexane; petroleum fractions were hydrogenated and purified Paraffin oil and the like can be mentioned.

These solvents are used alone or in combination of two or more in consideration of the balance between the polymerization characteristics of the monomers constituting the block copolymer and the solubility of the resulting polymer. The amount of the solvent to be used is preferably from 1 to 5 in consideration of the viscosity of the obtained polymer solution and the ease of heat removal.
It is determined to be 0 wt%, preferably 5 to 35 wt%.

In conducting the actual polymerization, the respective components are mixed at a temperature of, for example, -100 ° C. or more and less than 0 ° C. under cooling. A particularly preferred temperature range is from -30C to -80C in order to balance the energy cost with the stability of the polymerization. As the polyolefin resin (b) of the present invention, α
-Olefin homopolymers, random copolymers, block copolymers and mixtures thereof, or random copolymers of α-olefins and other unsaturated monomers, block copolymers, graft copolymers and These polymers obtained by oxidation, halogenation or sulfonation can be used alone or in combination of two or more. Specifically, polyethylene,
Ethylene-propylene copolymer, ethylene-propylene-non-conjugated diene copolymer, ethylene-butene copolymer,
Ethylene-hexene copolymer, ethylene-octene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-ethyl acrylate copolymer, polyethylene resin such as chlorinated polyethylene, polypropylene, propylene -Ethylene random copolymer, propylene-ethylene block copolymer, polypropylene resin such as chlorinated polypropylene, polybutene, polyisobutylene, polymethylpentene, (co) polymer of cyclic olefin, and the like. Among these, a polyethylene resin, a polypropylene resin, or a mixture thereof can be preferably used from the viewpoint of cost and balance of physical properties of the thermoplastic resin.

The blending amount of the component (b) polyolefin resin is determined based on the amount of the component (a) isobutylene-based block copolymer 100
5 to 400 parts by weight, preferably 10 to 10 parts by weight
It is 200 parts by weight, more preferably 20 to 100 parts by weight. If the amount is less than 5 parts by weight, the mechanical strength and moldability of the obtained thermoplastic resin composition will be reduced, and if it exceeds 400 parts by weight, the rubbery feel of the obtained thermoplastic resin composition will be reduced.

The softener (c) of the present invention is not particularly limited, but usually a liquid or liquid material at room temperature is suitably used. Also, both hydrophilic and hydrophobic softeners can be used. Examples of such a softening agent include various rubber or resin softening agents such as mineral oils, vegetable oils, and synthetic oils. Mineral oils include naphthenic and paraffinic process oils, and vegetable oils include castor oil, cottonseed oil, linseed oil, rapeseed oil, soybean oil, palm oil, palm oil, peanut oil, wood wax, and pine. Examples of the synthetic system include oil and olive oil, and polybutene and low molecular weight polybutadiene. Among these, a paraffin-based process oil or polybutene is preferably used from the viewpoint of compatibility with the component (a) or physical property balance of the thermoplastic resin composition. These softeners can be used in appropriate combination of two or more kinds in order to obtain desired viscosity and physical properties.

The amount of the component (c) softener is determined by the amount of the component (a)
The amount is 5 to 1,000 parts by weight, preferably 10 to 500 parts by weight, more preferably 20 to 300 parts by weight, based on 100 parts by weight of the isobutylene-based block copolymer. If the amount is less than 5 parts by weight, the rubbery feel of the obtained thermoplastic resin composition is reduced, and if it exceeds 1000 parts by weight, bleed out of the softener tends to occur.

Further, a filler can be added to the resin composition of the present invention from the viewpoint of improving physical properties or economical advantages. Suitable fillers include clay, diatomaceous earth, silica, talc, barium sulfate, calcium carbonate, magnesium carbonate, metal oxides, mica, graphite, scaly inorganic fillers such as aluminum hydroxide, various metal powders, and wood chips. , Glass powder, ceramic powder, carbon black, granular or powdery solid filler such as granular or powdery polymer, and other various natural or artificial short fibers and long fibers. The weight can be reduced by blending a hollow filler, for example, an inorganic hollow filler such as a glass balloon or a silica balloon, or an organic hollow filler made of polyvinylidene fluoride or a polyvinylidene fluoride copolymer. Further, in order to improve various physical properties such as weight reduction and impact absorption, it is possible to mix various foaming agents, and it is also possible to mechanically mix gas during mixing or the like.

The amount of the component (d) filler is determined by the amount of the component (a)
0 to 200 based on 100 parts by weight of the total amount of component (c)
Parts by weight, preferably from 0 to 100 parts by weight. 2
If the amount exceeds 00 parts by weight, the mechanical strength of the obtained thermoplastic resin composition decreases, and the flexibility is impaired. Further, the thermoplastic resin composition of the present invention may optionally contain an antioxidant and / or an ultraviolet absorber, and the amount is 0.000001 to 100 parts by weight of the thermoplastic resin. 10 parts by weight, preferably 0.0
0001 to 5 parts by weight. Further, other additives such as a flame retardant, an antibacterial agent, a light stabilizer, a colorant, a fluidity improver, a lubricant, an anti-blocking agent, an antistatic agent, a cross-linking agent, and a cross-linking auxiliary can be added. One type or a combination of two or more types can be used. Further, as long as the performance of the thermoplastic resin composition of the present invention is not impaired, various thermoplastic resins, thermosetting resins, thermoplastic elastomers and the like may be blended.

The method for producing the thermoplastic resin composition of the present invention is not particularly limited, and a known method can be applied. For example, melt-kneading the above components and, if desired, additive components using a heating kneader, for example, a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, a Brabender, a kneader, a high-shear mixer, or the like. Can be manufactured. The order of kneading the components is not particularly limited, and can be determined according to the equipment used, the workability, or the physical properties of the obtained thermoplastic resin composition.

[0030]

The present invention will be described more specifically with reference to the following examples. It should be noted that the present invention is not limited in any way by these embodiments, and can be appropriately changed and implemented without changing the gist thereof. The molecular weight of the block copolymer shown in this example and the physical properties of the thermoplastic resin composition were measured by the following methods. (1) Molecular weight: GPC system manufactured by Waters (column: Shodex K-804 (polystyrene gel) manufactured by Showa Denko KK, mobile phase: chloroform). The number average molecular weight is expressed in terms of polystyrene. (2) Compatibility with softener The thermoplastic resin composition is compression molded at 170 ° C. and has a thickness of 2 m.
m dumbbell specimens were prepared. When this test piece was pulled at a speed of 500 mm / sec using a tensile tester and fractured, the compatibility with the softener was evaluated based on whether or not the fractured surface was whitened. Compatibility ：: The fractured surface is not whitened Compatibility X: The fractured surface is whitened (3) Heat stability The thermoplastic resin composition was compression molded at 170 ° C. to prepare a dumbbell test piece. This test piece was left in a hot air oven set at 120 ° C. After 7 days, remove the test specimen,
The state of deterioration was visually observed. Heat stability ：: No change Heat stability △: Bleed out of softener, slight coloring,
Deformation of the test piece is observed. Heat stability x: Coloring and deformation are remarkable. (4) Mechanical strength A thermoplastic resin composition is compression-molded at 170 ° C and JIS3
No. dumbbell specimen was prepared. According to JIS K6251, the breaking strength was measured at a tensile speed of 500 mm / sec. (Production Example of Isobutylene Block Copolymer) In a 10 L reaction vessel equipped with a stirrer, 2166 mL of methylcyclohexane (dried with molecular sieves) and 1634 mL of methylene chloride (dried with molecular sieves) 1634
mL and 1.756 g of p-dicumyl chloride were added.
After cooling the reaction vessel to -70 ° C, α-picoline (2-
0.75 mL, isobutylene 633 m
L was added. Further, 30 mL of titanium tetrachloride was added to initiate polymerization, and the mixture was reacted at -70 ° C for 1.5 hours while stirring the solution. Then, 270 mL of styrene was added to the reaction solution, and the reaction was further continued for 20 minutes. Then, a large amount of methanol was added to stop the reaction. After removing the solvent and the like from the reaction solution, the polymer was dissolved in toluene and washed twice with water. This toluene solution was added to an acetone-methanol mixture to precipitate a polymer, and the obtained polymer was heated at 60 ° C. for 2 hours.
An isobutylene-based block copolymer was obtained by vacuum drying for 4 hours (hereinafter abbreviated as SIBS).

GPC analysis of the obtained isobutylene-based block copolymer (SIBS) revealed a number average molecular weight of 102,000 and a molecular weight distribution of 1.15.
The styrene content was 29% by weight. A thermoplastic resin composition was produced using the following raw materials. Component (a) Block copolymer Isobutylene-based block copolymer (SIBS): manufactured by Production Example Styrene-ethylene / butylene-styrene block copolymer (hereinafter abbreviated as SEBS): number average molecular weight 90,0
00, styrene content 30% by weight Component (b) Polyolefin resin Polypropylene 1 (hereinafter abbreviated as PP-1): Propylene-ethylene block copolymer Grand Polypro J7
05 (manufactured by Grand Polymer Co., Ltd.) Polypropylene 2 (hereinafter abbreviated as PP-2): polypropylene homopolymer Novatec MA-3 (manufactured by Nippon Polychem Co., Ltd.) Component (c) Softener Paraffin-based process oil (hereinafter abbreviated as PO) : Diana Process PW-380 (manufactured by Idemitsu Kosan) Polybutene 1 (hereinafter abbreviated as PB-1): Nisseki Polybutene HV-15 (manufactured by Nippon Petrochemical Co.) Polybutene 2 (hereinafter abbreviated as PB-2): Idemitsu Polybutene 15H (made by Idemitsu Petrochemical Co.) Antioxidant Hindered phenolic antioxidant: Irganox1
010 (manufactured by Ciba Geigy) (Examples 1 to 3, Comparative Examples 1 to 3) The components (a), (b), (c) and the antioxidant were set at 170 ° C. in the proportions shown in Table 1. The mixture was melt-kneaded using a lab plast mill (manufactured by Toyo Seiki Co., Ltd.). A test piece was prepared by compression-molding the obtained thermoplastic resin composition, and various physical properties were evaluated.

Table 1 shows the evaluation results.

[0033]

[Table 1]

[0034]

The thermoplastic resin composition of the present invention has good compatibility with a softener, and is excellent in heat stability and mechanical strength. Therefore, food use, daily goods, toy / exercise equipment use, stationery use, car interior / exterior use, civil engineering sheet /
Civil and architectural applications such as waterproof sheets and gaskets, AV and home appliance applications, OA and office equipment applications, clothing and footwear applications,
It can be used for textile applications, medical applications such as various catheters, containers, caps, etc., sanitary products such as disposable diapers and sanitary products, packaging and transporting materials, and wire applications such as wire coating, cables, connectors and plugs.

Claims (7)

[Claims] 1) 100 parts by weight of an isobutylene-based block copolymer comprising (a) a polymer block containing isobutylene as a main component and a polymer block containing a monomer component not containing isobutylene as a main component, and (b) a polyolefin-based block copolymer. Resin 5
A thermoplastic resin composition comprising from about 400 parts by weight to about 400 parts by weight and (c) from 5 to 1000 parts by weight of a softening agent. (2) The monomer component which does not contain isobutylene as a main component of the isobutylene-based block copolymer is a monomer containing an aromatic vinyl-based monomer as a main component. The thermoplastic resin composition according to claim 1. 3. The thermoplastic resin composition according to claim 2, wherein the aromatic vinyl monomer is at least one selected from the group consisting of styrene, p-methylstyrene, α-methylstyrene and indene. (A) the isobutylene-based block copolymer is a polymer block composed mainly of an aromatic vinyl monomer-a polymer block composed mainly of isobutylene-an aromatic vinyl monomer. Triblock copolymer composed of a polymer block having a main component, a polymer block composed mainly of an aromatic vinyl monomer-diblock copolymer composed of a polymer block composed mainly of isobutylene, aromatic An arm composed of a polymer block containing a vinyl monomer as a main component and a polymer block containing isobutylene as a main component has three arms.
The thermoplastic resin composition according to any one of claims 1 to 3, wherein the thermoplastic resin composition is at least one member selected from the group consisting of at least one star block copolymer. 5. The thermoplastic resin composition according to claim 1, wherein (b) the polyolefin resin is a polypropylene resin, a polyethylene resin, or a mixture thereof. 6. The thermoplastic resin composition according to claim 1, further comprising a filler. 7. The thermoplastic resin composition according to claim 1, further comprising an antioxidant and / or an ultraviolet absorber.