JPH04266952A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To improve the compatibility, impact resistance and strength of a resin composition containing a thermoplastic aromatic polyester and a nonpolar alpha-olefin. CONSTITUTION:The objective thermoplastic resin contains (A) a thermoplastic aromatic polyester such as polybutylene terephthalate, (B) a nonpolar alpha-olefin such as polyethylene (PE), (C) a graft polymer of a nonpolar alpha-olefin and a vinyl (co)polymer such as graft polymer of PE and a methyl methacrylate polymer (PMMA) containing the PMMA particles in dispersed state and (D) a thermoplastic resin consisting of a graft polymer of an epoxy group-containing olefin copolymer and a vinyl (co)polymer, e.g. graft polymer of ethylene/glycidyl methacrylate copolymer and PMMA containing the PMMA particles in dispersed state.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a thermoplastic resin composition for molding that has excellent impact resistance and strength, and can be used in a wide range of fields such as electrical and electronic parts and automobile parts. .

0002

[Prior art] Polybutylene terephthalate (PBT)
Thermoplastic aromatic polyester resins such as PET and polyethylene terephthalate (PET) have excellent heat resistance, mechanical properties, and chemical resistance, but they tend to have poor impact resistance, so attempts have been made to improve them. . The mainstream method for improving this is to combine PBT with various soft elastomer components such as modified olefin rubber made by reacting maleic anhydride or α,β-unsaturated acid glycidyl ester. The characteristics of PBT, such as rigidity, heat resistance, and chemical resistance, tend to deteriorate significantly.

On the other hand, non-polar α-olefin (co)polymers such as polyethylene and polypropylene have better rigidity and chemical resistance than the above-mentioned soft elastomers. Although it is desirable to use a combination of thermoplastic aromatic polyester resins and non-polar α-olefin (co)polymers, their compatibility is extremely poor due to their different chemical structures. However, it has been difficult to achieve the objective of obtaining a composition having excellent properties in both properties.

0004

[Problems to be Solved by the Invention] The object of the present invention is to combine a thermoplastic aromatic polyester resin and a non-polar α-olefin (co)polymer, which could not be realized due to extremely poor compatibility, and to Improves especially impact resistance,
The object of the present invention is to provide a thermoplastic resin composition that exhibits superior effects in terms of strength and the like.

[0005]

[Means for Solving the Problem] As a result of intensive studies to solve the problem of improving compatibility, the present inventors have developed a method for combining a thermoplastic aromatic polyester resin and a non-polar α-olefin (co)polymer with multiple The inventors have discovered that compatibility can be improved by blending a specific thermoplastic resin as a compatibilizer, and that a thermoplastic resin composition with excellent strength and impact resistance can thereby be obtained, leading to the completion of the present invention. .

That is, the present invention provides a thermoplastic aromatic polyester resin (1), a non-polar α-olefin (co)polymer (2), and a polymer having substantially the same structure as the above-mentioned non-polar α-olefin (co)polymer. A thermoplastic resin (3) consisting of a vinyl-based (co)polymer obtained from a polymer of and a vinyl-based (co)polymer obtained from an olefin copolymer containing an epoxy group and at least one vinyl monomer, and the (co)polymer particles on the other side form a dispersed phase. The present invention relates to a thermoplastic resin composition comprising resin (4).

The thermoplastic aromatic polyester resin (1) used in the present invention is a polyester having an aromatic ring as a continuous unit of the polymer, and is composed of an aromatic dicarboxylic acid (or its ester-forming derivative) and a diol (or its ester). It is a polymer or copolymer obtained by a condensation reaction containing as a main component (formable derivative).

[0008] The aromatic dicarboxylic acid mentioned here is
Terephthalic acid, isophthalic acid, phthalic acid, 2.6 naphthalene dicarboxylic acid, 1.5 naphthalene dicarboxylic acid, bis(P-carboxyphenyl)methane, anthracene dicarboxylic acid, 4.4'-diphenyl ether dicarboxylic acid, 1.2 -bis(phenoxy)ethane 4,4'-dicarboxylic acid or ester-forming derivatives thereof.

[0009] The diol component has 2 to 1 carbon atoms.
0 aliphatic diols, such as ethylene glycol, propylene glycol, 1.4-butanediol, neopentyl glycol, 1.5-pentadiol, 1.6-hexanediol, decamethylene diglycol, cyclohexanediol, etc., long chain glycols with a molecular weight of 400 to 6000. , i.e. polyethylene glycol, poly1
．． Examples include 3-propylene glycol, polytetramethylene glycol, and mixtures thereof.

Preferred thermoplastic aromatic polyester resins (1) used in the present invention include polyethylene terephthalate, polybutylene terephthalate,
Polypropylene terephthalate, polyhexamethylene terephthalate, polyethylene-2.6 naphthalate,
Examples include polycyclohexane terephthalate. More preferable examples include polyethylene terephthalate and polybutylene terephthalate. The intrinsic viscosity of these thermoplastic aromatic polyesters is 100±1 in 10 ml of tetrachloroethane (40)/phenol (60).
Measured as a concentration in mg at 30±0.1°C. Preferably, the intrinsic viscosity is 0.4 to 4.0 dl/g.

The nonpolar α-olefin (co)polymer (2) used in the present invention is a polymer obtained by (co)polymerizing one or more α-olefin monomers and a nonconjugated diene monomer. It is a polymer. Examples of the α-olefin monomer here include ethylene, propylene, butene-1, 4-methylpentene-1, hexene-1, decene-1, octene-1, and the like. Examples of non-conjugated diene monomers include 1,4-hexadiene and dicyclopentadiene.

Specific examples of the non-polar α-olefin (co)polymers include high, medium, and low density polyethylene resins, homopolymers such as polypropylene, polybutene-1, poly-4-methylpentene-1, and ethylene-propylene. copolymers, copolymers of ethylene and α-olefins having 3 to 12 carbon atoms, such as ethylene-butene-1 copolymers, ethylene-hexene-1 copolymers, and ethylene-octene-1 copolymers; ethylene; - Propylene copolymer rubber, ethylene-propylene-ethylidene norbornene copolymer rubber, ethylene-propylene-1,4-hexadiene copolymer rubber, ethylene-propylene-1,4-dicyclopentadiene copolymer rubber, etc. be able to. Preferably high, medium and low density polyethylene resins, polypropylene, homopolymers such as poly4-methylpentene-1, ethylene-
These include propylene copolymer and ethylene-propylene copolymer rubber, and particularly preferred are ethylene polymers and propylene polymers. Furthermore, two or more of these nonpolar α-olefin (co)polymers may be used in a blend.

On the other hand, when the thermoplastic resin (3) referred to in the present invention is observed with an electron microscope etc., it is found that the thermoplastic resin (3) is a non-polar α-olefin (
In a polymer having substantially the same structure as co)polymer (2) or a vinyl-based (co)polymer matrix, a vinyl-based (co)polymer or the non-polar α-olefin (co)polymer, which is a different component from it, is added. It is a thermoplastic resin with a so-called multi-phase structure in which the polymer appears to be uniformly dispersed in a spherical shape. The particle diameter of the dispersed polymer is 0.001 to 10 μm, preferably 0.01 to 5 μm. When the dispersed particle size is within this range, the nonpolar α-olefin (co)polymer and the aromatic polyester have sufficient compatibility, and the impact resistance and tensile elongation of the composition are improved. Note that the polymer having substantially the same structure as the nonpolar α-olefin (co)polymer herein refers to the nonpolar α-olefin (co)polymer (2
) refers to a polymer in which up to 40% by weight of a monomer having a different structure is used compared to the monomer used in (2).

As the nonpolar α-olefin (co)polymer in the thermoplastic resin (3), the above-mentioned ethylene polymers, propylene polymers, and the like are particularly preferred.

[0015] The vinyl (co)polymer in the thermoplastic resin (3) and in the thermoplastic resin (4) to be described later are:
Vinyl systems obtained from at least one vinyl monomer (
co)polymers, specifically styrene, nuclear substituted styrenes such as methylstyrene, dimethylstyrene, ethylstyrene, isopropylstyrene, chlorstyrene, α
-Substituted styrene Vinyl aromatic monomers such as α-methylstyrene and α-ethylstyrene: (meth)acrylic acid methyl, ethyl, propyl, butyl esters Nadono(meth)acrylic acid ester monomers: (meth)acrylonitrile monomers : A vinyl-based (co)polymer obtained by polymerizing one or more types of vinyl acetate, vinyl propionate vinyl nadonovinyl ester monomers, etc. If possible, the vinyl monomer used in the production of thermoplastic resin (3) and the vinyl monomer used in the production of thermoplastic resin (4) should be composed of the same vinyl monomer. Preferred in the invention.

The number average degree of polymerization of such a vinyl (co)polymer is in the range of 5 to 10,000, preferably 10 to 5,000.

This thermoplastic resin (3) contains 5 to 5 polymers having substantially the same structure as the nonpolar α-olefin (co)polymer.
95% by weight, preferably 20-90% by weight and vinyl (
It consists of 95-5% by weight, preferably 80-10% by weight of co)polymer. Within this range, the effects of improving heat resistance, dispersibility, and impact resistance are particularly excellent.

On the other hand, when the thermoplastic resin (4) referred to in the present invention is observed under an electron microscope, it is found that vinyl, which is a different component, is present in the epoxy group-containing olefin copolymer or vinyl (co)polymer matrix. It is a thermoplastic resin with a so-called multiphase structure in which a system (co)polymer or an epoxy group-containing olefin copolymer is uniformly dispersed in a spherical shape. The particle system of the dispersed polymer is 0.001~
It is 10 μm, preferably 0.01 to 5 μm. When the dispersed particle size is within this range, non-polar α-olefin (
The compatibility between the co)polymer and the aromatic polyester is sufficient, and the impact resistance and tensile elongation of the composition are improved.

Such a thermoplastic resin (4) contains 5 to 95% by weight, preferably 20 to 90% by weight of an epoxy group-containing olefin copolymer and 95 to 5% by weight, preferably 95 to 5% by weight of a vinyl (co)polymer. It consists of 80 to 10% by weight. Within this range, the effect of improving impact resistance, heat resistance, and dispersibility are particularly excellent.

The monomers used in the vinyl (co)polymer in the thermoplastic resin (4) are as described above, and their number average degree of polymerization is also in the range of 5 to 10,000, preferably 10 to 5,000.

The epoxy group-containing olefin copolymer in the thermoplastic resin (4) is a binary copolymer of an olefin and an unsaturated glycidyl group-containing monomer, or an olefin and an unsaturated monomer formed by high-pressure radical polymerization. It is a ternary or multi-component copolymer of a saturated glycidyl group-containing monomer and other unsaturated monomers, and contains an olefin, especially an olefin (ethylene) of 60 to 99.5% by weight, containing a glycidyl group. Monomer 0.5-40% by weight, other unsaturated monomers 0-40% by weight
A copolymer comprising 39.5% by weight is preferred.

[0022] Examples of the unsaturated glycidyl group-containing monomer include glycidyl acrylate, glycidyl methacrylate,
Itaconic acid monoglycidyl ester, butenetricarboxylic acid monoglycidyl ester, and glycidyl esters such as α-chloroallyl, maleic acid, crotonic acid, and fumaric acid, or vinyl glycidyl ether, allyl glycidyl ether, glycidyloxyethyl vinyl ether, styrene-P-glycidyl ether Examples include glycidyl ethers such as P-glycidyl styrene, and particularly preferred are glycidyl (meth)acrylate and acrylic glycidyl ether.

The other unsaturated monomer is at least one monomer selected from olefins, vinyl esters, α, β-ethylenically unsaturated carboxylic acids, etc., and specifically, propylene, butene, etc. 1.Olefins such as hexene-1, decene-1, octene-1, styrene,
Vinyl esters such as vinyl propionate, vinyl acetate, vinyl benzoate, acrylic acid, methacrylic acid,
Methyl, ethyl, propyl, butyl, 2-ethylhexyl, cyclohexyl of acrylic acid or methacrylic acid,
Examples include esters such as dodecyl and octadecyl, maleic acid, maleic anhydride, itaconic acid, fumaric acid, maleic acid monoesters, and diesters, vinyl ethers such as vinyl chloride and vinyl methyl ether, and acrylic acid amide compounds. Acrylic acid esters are particularly preferred.

Specific examples of the epoxy group-containing olefin copolymers include ethylene/glycidyl methacrylate copolymer, ethylene/vinyl acetate/glycidyl methacrylate copolymer, and ethylene/ethyl acrylate/glycidyl methacrylate copolymer. , ethylene/carbon monoxide/glycidyl methacrylate copolymer, ethylene/glycidyl acrylate copolymer, ethylene/vinyl acetate/glycidyl acrylate copolymer, and the like. Among these, preferred are ethylene/glycidyl methacrylate copolymer, ethylene/ethyl acrylate/glycidyl methacrylate copolymer, or ethylene/vinyl acetate/glycidyl methacrylate copolymer. These epoxy group-containing olefin copolymers can be used as a mixture.

The epoxy group-containing olefin copolymers of the present invention include homopolymers such as low density, medium density, and high density polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, and ethylene-propylene copolymers. Coalescence, ethylene-butene-1 copolymer, ethylene-hexene-1 copolymer, ethylene-4-methylpentene-1
Copolymers, copolymers with other α-olefins mainly composed of ethylene such as ethylene-octene-1 copolymers, and other α-olefins mainly composed of propylene such as propylene-ethylene block copolymers copolymer with
Ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, copolymer of ethylene and ester of acrylic acid or methacrylic acid such as methyl, ethyl, propyl, isopropyl, butyl, ethylene-maleic acid copolymer, Addition of the epoxy group-containing monomer to ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, ethylene-vinyl acetate-vinyl chloride copolymer, and mixtures thereof, or mixtures of these and rubber. The present invention also encompasses the following.

[0026] As a method for producing the thermoplastic resin (3) or thermoplastic resin (4) as described above, for example, non-polar α
- Suspend an olefin (co)polymer (or olefin copolymer containing an epoxy group) in water, add a solution containing a vinyl (co)monomer, a radical polymerization initiator, etc. to the suspension, impregnate it, and then Known methods such as a polymerization method or a grafting method similar to the above method can be used. In the present invention, the use of thermoplastic resins (3) or (4) obtained by a grafting method is particularly preferred.

[0027] As a grafting method, for example, nonpolar α
- An olefin (co)polymer (or an epoxy group-containing olefin copolymer) is suspended in water, and separately a radical (co)polymerizable organic peroxide such as t-butylperoxymethacryloyloxyethyl carbonate and benzoyl peroxide are suspended in water. A radical polymerization initiator such as is dissolved in at least one vinyl monomer. This solution was added to the above suspension and heated under conditions that did not cause decomposition of the polymerization initiator to convert the vinyl monomer, radically polymerizable (co)organic peroxide, and radical polymerization initiator into non-polar α-olefin ( The vinyl monomer and the radically (co)polymerizable organic peroxide are impregnated into a co)polymer (or an epoxy group-containing olefin copolymer) and then the temperature of this aqueous suspension is increased to form a nonpolar polymer. α- (co)
A method of copolymerizing in a polymer (or an olefin copolymer containing an epoxy group) and then melt-kneading it with an extruder etc. to obtain a grafted product (see JP-A-63-312313 and JP-A-1-98663), or Generally known grafting methods such as chain transfer method and radiation irradiation method are used.

Thermoplastic resin obtained using the grafting method (
3) and the thermoplastic resin (4) are a grafted product consisting of a nonpolar α-olefin (co)polymer (or an olefin copolymer containing an epoxy group) and a vinyl (co)polymer, or a vinyl monomer as other components. It is a mixture containing addition polymers of polymers and the like.

In the composition of the present invention, the thermoplastic aromatic polyester resin (1) and the nonpolar α-olefin (co-)
The composition ratio with polymer (2) is (1) 30 to 95% by weight
(2) is preferably 70 to 5% by weight.

[0030] Furthermore, the thermoplastic resin (3) in the composition of the present invention
) usage amount is thermoplastic aromatic polyester resin (1)
and non-polar α-olefin (co)polymer (2), i.e., 0.1 to 100 parts per 100 parts by weight of (1) + (2).
Parts by weight, preferably 1 to 50 parts by weight. Within this range, the thermoplastic aromatic polyester resin and the non-polar α-olefin (co)polymer have good compatibility and have excellent mechanical properties such as impact resistance, as well as good heat resistance and chemical resistance. .

Furthermore, the amount of the thermoplastic resin (4) used is 0.1 to 100 parts by weight in total of the thermoplastic aromatic polyester resin (1) and the nonpolar α-olefin (co)polymer (2). The amount is 100 parts by weight, preferably 1 to 50 parts by weight. Within this range, the thermoplastic aromatic polyester resin and the nonpolar α-olefin (co)polymer have good compatibility, and also have good heat resistance and chemical resistance.

In the present invention, the above-mentioned component (1)
+ (2) + (3) + (4) 150 per 100 parts by weight
Up to parts by weight of inorganic and organic fillers (5) can be included. The above-mentioned filler may be powder-like, flat-like,
Examples include scale-like, acicular, spherical or hollow, and fibrous, and specific examples include calcium sulfate, calcium silicate, clay, talc, alumina, silica sand, glass powder, metal powder, graphite, silicon carbide, silicon nitride, Powder-like fillers such as silica, boron nitride, aluminum nitride, carbon black, mica, glass plates, sericite, metal foils such as aluminum flakes, flat or scaly fillers such as graphite, glass balloons, metal balloons , hollow fillers such as glass balloons, organic fibrous fillers such as glass fibers, carbon fibers, graphite fibers, whiskers, metal fibers, asbestos, wasnite, fibrous fillers, aromatic polyamide fibers, and polyphenylene sulfide fibers. I can do it.

Furthermore, in the present invention, inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide, organic flame retardants such as halogen-based and phosphorus-based flame retardants, antioxidants, UV inhibitor, lubricant, dispersant,
Additives such as coupling agents, blowing agents, crosslinking agents, coloring agents, and other polyolefin resins, thermoplastic resins such as polyamide, polycarbonate, ABS resin, polyphenylene ether, and polyphenylene sulfide may be added. .

[0034] Conventional methods can be used to produce the composition of the present invention. The most common method is to uniformly mix the above-mentioned composition of the present invention in a suitable mixer such as a tumbler, Henschel mixer, tumbler, etc., feed it to an extruder, melt and knead it, and extrude it into a strand, which is then cooled. , cut and supply as molding material. Even more simply, it is possible to omit the extrusion step and directly melt and knead the compound of the present invention in a molding machine to mold it, but this is not particularly limited.

[0035]

EXAMPLES The present invention will be further explained by examples. Reference example 1 (manufacture of thermoplastic resin (3A)) 5000cc
Put 2,500 g of pure water into a stainless steel autoclave, and add 2.5 g of polyvinyl alcohol as a suspending agent.
was dissolved. Into this, 700 g of low density polyethylene (trade name "Mitsui Nisseki Polyethylene LDF41") as a non-polar α-olefin (co)polymer was added, stirred and dispersed. 1.5 g of "B", 6 g of t-butylperoxymethacryloyloxyethyl carbonate as a radical (co)polymerizable organic peroxide, and 300 g of methyl methacrylate as a vinyl monomer, and this solution was placed in the autoclave. Then, the autoclave was heated to 60-65°C and stirred for 2 hours to reduce the density of the vinyl monomer containing the radical polymerization initiator and the radical (co)polymerizable organic peroxide. It was impregnated into polyethylene.Then, after confirming that the total amount of the impregnated vinyl monomer, radical polymerization initiator, and radical (co)polymerizable organic peroxide was less than 50% by weight of the initial amount. , the temperature was raised to 80-85°C and maintained at that temperature for 7 hours to complete the polymerization, washed with water and dried to obtain a grafted precursor.The methyl methacrylate polymer in this grafted precursor was dissolved in acetic acid. Extract with ethyl, G
The number average degree of polymerization was measured by PC and found to be 700. Next, this grafted precursor was extruded at 200°C using a Labo Plast Mill screw extruder "manufactured by Toyo Seiki Seisakusho".
By carrying out a grafting reaction, thermoplastic resin (3A
) was obtained.

When this thermoplastic resin was observed using a scanning electron microscope, it was found to be a thermoplastic resin in which perfectly spherical resin particles having a particle size of 0.1 to 0.2 μm were uniformly dispersed. At this time, the grafting efficiency of the methyl methacrylate polymer was 53
% by weight.

Reference Example 2 (Production of thermoplastic resin (4A))
Pure water 2 in a 5000cc stainless steel autoclave
In addition, 2.5 g of polyvinyl alcohol was added as a suspending agent. 700 g of an ethylene/glycidyl methacrylate copolymer (containing 15% by weight of glycidyl methacrylate) "trade name: Rexpar J3700" as an epoxy group-containing olefin copolymer was placed in this, and the mixture was stirred and dispersed. Separately, 1.5 g of benzoyl peroxide "trade name Niper B" as a radical polymerization initiator
, 6 g of t-butylperoxymethacryloyloxyethyl carbonate as a radical (co)polymerizable organic peroxide
and n-dodecyl mercaptan 0 as a molecular weight regulator.
．． 6g as vinyl monomer methyl methacrylate 30
This solution was poured into the autoclave and stirred.

Next, the autoclave was heated to 60 to 65°C and stirred for 2 hours to convert the vinyl monomer containing the radical polymerization initiator and the radical (co)polymerizable organic peroxide into an epoxy group-containing ethylene copolymer. Impregnated into polymer. Next, after confirming that the total amount of the impregnated vinyl monomer, radical polymerization initiator, and radical (co)polymerizable organic peroxide is at least 50% by weight, the temperature is increased to 80 to 85°C. The polymerization was completed by raising the temperature to 7 hours, washing with water, and drying to obtain a grafted precursor. The methyl methacrylate polymer in this grafted precursor was extracted with ethyl acetate, and the number average degree of polymerization was measured by GPC and found to be 700. Next, this grafting precursor was extruded at 200° C. using a Labo Plast Mil-axial extruder “manufactured by Toyo Seiki Seisakusho” to cause a grafting reaction, thereby obtaining a thermoplastic resin (4A).

When this thermoplastic resin was observed using a scanning electron microscope, it was found to be a thermoplastic resin in which perfectly spherical resin particles having a particle size of 0.1 to 0.2 μm were uniformly dispersed. At this time, the grafting efficiency of the methyl methacrylate polymer was 63
．． It was 3% by weight.

Examples 1 to 5, Comparative Examples 1 to 3 As aromatic polyesters, polybutylene terephthalate (hereinafter referred to as PBT) with an intrinsic viscosity of 0.95 dl/g and nonpolar α
- High-density polyethylene (as an olefin (co)polymer)
The thermoplastic resins (3A) or (4A) obtained in Reference Examples 1 and 2 were dry-blended in the amounts shown in Table 1 using a product manufactured by Showa Denko (trade name "Shorex 5050").
Using a φ mm single screw extruder, the mixture was kneaded at 250°C, extruded into a strand, and cooled with water to a length of 3 mm.
A molding material was obtained. 1 of the obtained molding material
After drying at 20°C for 3 hours, a dumbbell for tensile test (ASTM No. IV test piece) and a test piece for Izod impact value measurement (1/4 inch thick, molded notch) were molded using an injection molding machine.
was molded and the tensile properties and Izod impact value were measured, and the results are shown in Table 1.

[0041] In contrast to the inventive examples, in which good physical properties were obtained, in the comparative examples, the compatibility between PBT and polyethylene was poor, and good strands and molding materials could not be obtained.

[0042]

[Table 1]

Reference Example 3 (Production of thermoplastic resin (3B))
In Reference Example 1, polypropylene (trade name "Showaromer M") was used as the nonpolar α-olefin (co)polymer.
A510''), a thermoplastic resin (3B) was obtained by repeating Reference Example 1, except that 300 g of methyl methacrylate monomer as the vinyl monomer was changed to 300 g of styrene monomer. The number average degree of polymerization of the styrene polymer at this time was 900.
Moreover, the average particle diameter of the resin dispersed in the thermoplastic resin was 0.3 to 0.4 μm.

Reference Example 4 (Production of thermoplastic resin (4B))
Thermoplastic resin (4B) was prepared by repeating Reference Example 2 except that 300 g of methyl methacrylate monomer as the vinyl monomer was changed to 300 g of styrene monomer.
I got it. The number average degree of polymerization of the styrene polymer at this time is 8
00, and the average particle diameter of the resin dispersed in the thermoplastic resin was 0.2 to 0.3 μm.

Examples 6 to 10, Comparative Examples 4 to 6 Polyethylene terephthalate (hereinafter referred to as PET) with an intrinsic viscosity of 0.52 dl/g was used as the aromatic polyester, and polypropylene (commercial product) was used as the nonpolar α-olefin (co)polymer. given name"
The thermoplastic resins (3B) and (4B) obtained in Reference Examples 3 and 4 were
) were dry-blended with the formulation shown in Table 2, kneaded at 2800°C using a 35φmm twin-screw extruder, extruded into strands, cooled with water, and cut into 3mm lengths to obtain a molding material. Ta. The obtained molding material was heated at 120℃ for 3
After drying for a while, the dumbbell for tensile test (
ASTM No. IV test piece) and Izod impact value measurement test piece (1/4 inch thick, molded notch) were molded,
The tensile properties and Izod impact value were measured and the results are shown in Table 2.

The inventive example showed good tensile properties and impact resistance, whereas the comparative example could be extruded in the form of a strand, and although a molding material was obtained, the physical properties of the molded product were poor and brittle fracture occurred. Ta.

[0047]

[Table 2]

Examples 11-13, Comparative Examples 7-9 Example 1
~5, PBT, high-density polyethylene, thermoplastic resin (3A), and glass fiber (product name: "Microglass RES03-TP") used in Comparative Examples 1 to 3.
70'' manufactured by Nippon Sheet Glass Co., Ltd.) were dry blended in the amounts shown in Table 3, extruded onto a strand using a 35 mm twin screw extruder, cooled and solidified, and then cut into 3 mm lengths to obtain a molding material. This molding material was molded in the same manner as Examples 1 to 5 and Comparative Examples 1 to 3, and its physical properties were measured. The results are shown in Table 3. It can be seen that the examples of the present invention have excellent mechanical properties.

[0049]

[Table 3]

[0050]

Effects of the Invention The thermoplastic resin composition of the present invention has excellent mechanical properties, particularly tensile properties and impact resistance, and is low in cost, making it useful as home appliance parts, electrical and electronic parts, and mechanical parts.

Claims (9)

[Claims] Claim 1: Thermoplastic aromatic polyester resin (1),
Non-polar α-olefin (co)polymer (2), a vinyl-based polymer obtained from a polymer having substantially the same structure as the above-mentioned non-polar α-olefin (co)polymer and at least one vinyl monomer ( a thermoplastic resin (3) consisting of a co)polymer and in which particles of the (co)polymer form a dispersed phase; and an olefin copolymer containing an epoxy group and at least one vinyl monomer. A thermoplastic resin composition comprising a thermoplastic resin (4) consisting of a vinyl-based (co)polymer obtained, and a thermoplastic resin (4) in which particles of the first (co)polymer form a dispersed phase. [Claim 2] Nonpolar α-olefin (co)polymer (2)
The thermoplastic resin composition according to claim 1, wherein is an ethylene polymer. [Claim 3] Nonpolar α-olefin (co)polymer (2)
The thermoplastic resin composition according to claim 1, wherein is a propylene polymer. 4. The thermoplastic resin (3) is a vinyl-based resin (3) obtained from a polymer having substantially the same structure as the non-polar α-olefin (co)polymer (2) and at least one vinyl monomer. 4. The thermoplastic resin composition according to claim 1, which is a grafted product comprising a co)polymer or a mixture containing the same. 5. Claim 1, wherein the thermoplastic resin (3) is a grafted product consisting of a vinyl (co)polymer obtained from an ethylene polymer and at least one vinyl monomer, or a mixture containing the same. , 2 or 3. The thermoplastic resin composition according to item 2 or 3. 6. Claim 1, wherein the thermoplastic resin (3) is a grafted product consisting of a propylene polymer and a vinyl (co)polymer obtained from at least one vinyl monomer, or a mixture containing the same. , 2 or 3. The thermoplastic resin composition according to item 2 or 3. 7. The thermoplastic resin (4) is a grafted product consisting of a vinyl (co)polymer obtained from an epoxy group-containing olefin copolymer and at least one vinyl monomer, or a mixture containing the same. The thermoplastic resin composition according to claims 1 to 6. 8. The vinyl monomer used in the thermoplastic resin (3) and the vinyl monomer used in the thermoplastic resin (4) are composed of the same vinyl monomer. The thermoplastic resin composition according to claims 1 to 7. 9. The vinyl monomer is a vinyl aromatic monomer, (
Claims 1 to 8 are one or more vinyl monomers selected from the group consisting of meth)acrylic acid ester monomers, vinyl ester monomers, and (meth)acrylonitrile monomers. thermoplastic resin composition.