JP2000095924A - Polyester resin composition and molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyester resin composition which can give a molded product excellent in oil resistance, flexibility, and heat resistance by incorporating a polyester resin component comprising a specified amount of a polyoxyalkylene glycol component and a specified amount, based on the entire acid component, hydroxydicarboxylic acid component with an epoxy compound. SOLUTION: This composition comprises 90-99.9 wt.% polyester resin comprising a dicarboxylic acid component such as an aromatic dicarboxylic acid or an esterifiable derivative thereof; a diol component; 5-65 wt.% polyoxyalkylene glycol component having a weight-average molecular weight of 400-3,000; and 0.1-10 mol%, based on the entire acid component, hydroxydicarboxylic acid represented by the formula and having a limiting viscosity of 0.5 dl/g or above (in a 1/1 phenol/tetrachloroethane mixed solvent at 25 deg.C) and 0.1-10 wt.% epoxy compound having at least two epoxy groups in the molecule. In the formula, X is a group represented by the formula: -CH2CH2- or -CH2CH(CH3)-; and n is an integer of 0-4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester resin composition and a molded article, and more particularly, to a polyester resin composition having excellent flexibility, impact resistance, and excellent properties such as heat resistance, surface gloss, and chemical resistance. It has.

[0002]

2. Description of the Related Art Thermoplastic polyester elastomers are:
It is composed of a polyester and polyether repeating unit or a polyester and a multi-block copolymer having the same in the main chain, and has excellent mechanical properties, heat resistance and oil resistance. Due to these excellent features, their use has been expanded to industrial materials such as sheets, films, fibers, etc., automobiles, and electric and electronic parts. However, those having excellent heat resistance have drawbacks that the elastomer has high hardness and is inferior in flexibility. For this reason, various proposals have been made to improve this, for example, Japanese Patent Application Laid-Open No. 56-1452.
No. 5 proposes a method of crosslinking molecular chains during molding. Japanese Patent Application Laid-Open No. 2-173059 discloses a method of adding a polyamide and a sulfur-based antioxidant or a phosphorus-based antioxidant. Further, Japanese Unexamined Patent Application Publication No.
No. 8 proposes a method of increasing Tg (glass transition point) using 2,6-naphthalenedicarboxylic acid or the like. In addition, Japanese Patent Publication No. 55-35057 discloses that a crosslinking agent is added on a rubber roll containing a vulcanizable rubber and then vulcanized, as in the case of ordinary rubber, so that flexibility is improved. A method for achieving both heat resistance has also been proposed.

[0003]

However, according to the method proposed in Japanese Patent Application Laid-Open No. 56-14525,
No satisfactory results have been obtained. In addition, in the method proposed in Japanese Patent Application Laid-Open No. 2-173059, since the added polyamide resin has a higher elastic modulus than the polyester elastomer, the elastic modulus of the composition after the addition increases, and other mechanical properties also change. There was a problem. Furthermore, the method proposed in JP-A-5-239198 is not satisfactory in a temperature range of a glass transition point of 100 ° C. or higher. Also, Japanese Patent Publication No. 55-35
In the method proposed in Japanese Patent No. 057, the temperature at which the crosslinking agent is added is significantly lower than the melting point of the polyester, so that it was difficult to disperse and knead the crosslinking agent. Further, in actual production, it is difficult to obtain a stable composition, and further, an elastomer having good heat resistance has been desired.

The present invention has been made in view of the above circumstances, and retains the excellent characteristics of a thermoplastic polyester elastomer such as mechanical properties (impact resistance) and oil resistance, and
An object of the present invention is to provide a polyester resin composition having sufficient flexibility and excellent heat resistance and a molded article using the same.

[0005]

In order to solve the above-mentioned problems, the present invention provides (A) a dicarboxylic acid component,
(B) a diol component, (C) a weight average molecular weight of 400 to 3.
000 polyoxyalkylene glycol components, (D)
The following general formula (1)

Embedded image Consisting of a hydroxydicarboxylic acid component represented by the formula:
(E) 90 to 99.9% by weight of a polyester resin component having an intrinsic viscosity of 0.5 dl / g or more measured in a mixed solvent of phenol / tetrachloroetaene at equivalent temperature of at least 2%. A polyester composition comprising 0.1 to 10% by weight of an epoxy compound having at least two epoxy groups, wherein the component (C) is contained in a polyester resin component in an amount of 5 to 65% by weight, and the (D) ) Components
0.1 to the total acid component in the polyester resin component
The present invention proposes a polyester resin composition characterized by being contained in an amount of from 10 to 10 mol%, and a molded article obtained by molding the polyester resin composition.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The dicarboxylic acid component (A) constituting the polyester resin component used in the present invention is not particularly limited, but from the viewpoint of heat resistance, aromatic dicarboxylic acids and / or their ester-forming derivatives are mainly used. Is preferably included. As aromatic dicarboxylic acids, terephthalic acid,
Isophthalic acid, naphthalene-1,4 or 2,6-dicarboxylic acid, anthracenedicarboxylic acid, 4,4′-diphenyldicarboxylic acid, 4,4′-diphenyletherdicarboxylic acid, 5-sulfoisophthalic acid, sodium 3-sulfoisophthalate And so on. Examples of these ester-forming derivatives include lower alkyl esters, aryl esters, carbonates, and acid halides. These dicarboxylic acid components are used alone or in combination of two or more. In the present invention, it is preferable that the aromatic dicarboxylic acid component is contained in an amount of at least 80 mol%, more preferably at least 85 mol%, of all the acid components constituting the polyester resin component. If less than 80 mol%,
The mechanical strength of the molded body may decrease, and as a result,
This may cause a drop in productivity.

As the dicarboxylic acid component (A) other than the aromatic dicarboxylic acid, an aliphatic dicarboxylic acid and / or an ester-forming derivative thereof is contained in an amount of less than 20 mol% in all the acid components constituting the polyester resin component. ,
Preferably, it can be blended in a range of less than 15 mol%. If it exceeds 20 mol%, the mechanical strength of the molded article may be reduced. Examples of the aliphatic dicarboxylic acids include oxalic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, sebacic acid, azelaic acid, dodecandionic acid, dimer acid, 1,3 or 1,4-cyclohexanedicarboxylic acid, and cyclopentanedicarboxylic acid. Acids, 4,4'-dicyclohexyldicarboxylic acid and the like.

The following components are preferably used as the diol component (B) constituting the polyester resin component used in the present invention in order to impart color tone, transparency, heat resistance, impact resistance and the like. That is, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,4-butanediol,
1,6-hexanediol, neopentyl glycol,
Dimer diol, cyclohexane diol, cyclohexane dimethanol, the following general formulas (2) and (3),
(4)

[0009]

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[0010]

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[0011]

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The alcohol component represented by the above or an ethylene oxide adduct of these derivatives can be used. Among these, an ethylene oxide adduct of bisphenol A represented by the general formula (4) is preferable.

The polyester resin component used in the present invention further contains (C) a polyoxyalkylene glycol component. (C) The polyoxyalkylene glycol component imparts flexibility to the polyester resin composition. Specific examples thereof include, for example, polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol block copolymer,
Polytetramethylene glycol, polyhexamethylene glycol and the like can be mentioned. These can be used alone or 2
It can be used as a mixture of more than one species.

The weight average molecular weight of the polyoxyalkylene glycol component (C) is preferably from 400 to 3,000.
If it is less than 400, the flexibility is insufficient, and if it exceeds 3,000, the compatibility with the polymer is poor, the polymerization reaction tends to be stagnant, and the mechanical properties of the molded article tend to decrease. Also,
(C) The addition amount of the polyoxyalkylene glycol component is 5 to 65% by weight, more preferably 20 to 50% by weight in the polyester resin component. If it is less than 5% by weight, there is no effect of addition, and if it exceeds 65% by weight, heat resistance tends to decrease.

(D) The hydroxydicarboxylic acid component is represented by the above general formula (1), and is 0.1 to 10 mol%, preferably 0.5 to 5 mol%, based on all the acid components in the polyester resin component. Mole%. (D) The hydroxydicarboxylic acid component is a component that imparts heat resistance. (D) When the copolymerization amount of the hydroxydicarboxylic acid component is less than 0.1 mol%, the effect of imparting heat resistance is insufficient, and when it exceeds 10 mol%, the effect of improving heat resistance is saturated, and conversely, the elastic modulus is large. And tend to lose flexibility.

In the general formula (1), X in the formula is
An ethylene group represented by —CH ₂ CH ₂ —, or —CH ₂
CH (CH ₃ ) — is a 1,2-propylene group. In the present invention, among the hydroxydicarboxylic acid units constituting the polyester resin component, X is an ethylene group, all 1,2-propylene groups, or a part thereof is an ethylene group, and the rest is 1,2-propylene group. It may be a group. Above all, it is preferable to use all ethylene groups because the production of the copolymerized polyester resin component becomes easy.
In the general formula (1), n in the formula is an integer of 0 to 4, and more preferably 0 or 1. If it exceeds 4, the thermal stability at the time of melting of the copolymerized polyester resin component and the easiness of production tend to decrease. Specific examples of the (D) hydroxydicarboxylic acid component include those represented by the following general formulas (5) to (8).

[0017]

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By using the hydroxydicarboxylic acids represented by the general formulas (5) to (8), a polyester resin component having good melt stability can be obtained.

In the polyester resin component used in the present invention, the above-mentioned (A) dicarboxylic acid component and (B)
A diol component, (C) a hydroxydicarboxylic acid component,
In addition to (D) the polyoxyalkylene glycol, a trivalent or higher polycarboxylic acid and / or a polyhydric alcohol can be used for crosslinking the polyester resin component, if necessary. Specific examples include trimellitic acid,
Polyhydric carboxylic acids such as pyromellitic acid or anhydrides thereof; and polyhydric alcohols such as trimethylolpropane, pentaerythritol and glycerin. When polyhydric carboxylic acid and / or polyhydric alcohol is compounded, the compounding amount is 0 to 1 mol%, more preferably 0.05 to 0.5 mol%, based on the acid component or alcohol component in the polyester resin component. Range. 1 mol%
Beyond this, gelation makes it difficult to control the reaction, and mechanical properties tend to be reduced.

The polyester resin component having such a constitution can be produced by a known direct polymerization method or transesterification method. (C) The polyoxyalkylene glycol component is usually used at the time of polymerization, (A) carboxylic acid component,
By charging together with the monomers of (B) diol component and (D) hydroxydicarboxylic acid component, it can be blended into a polyester resin component obtained by polymerization. In the polymerization, a known polymerization catalyst, for example, titanium butoxide, dibutyltin oxide, tin acetate, zinc acetate, tin disulfide, antimony trioxide, germanium dioxide and the like can be used. The polymerization temperature and the amount of the catalyst are not particularly limited, and can be arbitrarily set according to the raw material, the composition, the degree of polymerization and the like.

The degree of polymerization is 25 ° C. of the polyester resin component.
Is preferably 0.5 dl / g or more, more preferably 0.6 dl / g or more, as measured in a mixed solvent of phenol / tetrachloroethane equivalents of the above. 0.5
If it is smaller than dl / g, the viscosity is low, the strand is difficult to cool, and the loss at the time of pelletizing tends to increase.

The polyester resin composition of the present invention is a mixture of the above-mentioned polyester resin component and (E) an epoxy compound. As the epoxy compound (E), a compound having at least two epoxy groups in a molecule is preferable from the viewpoint of heat resistance and mechanical strength of a resin molded product obtained by curing. Examples of such an epoxy compound include a bisphenol A epoxy resin, a bisphenol F epoxy resin, and a bisphenol S epoxy resin obtained by reacting bisphenol A with epichlorohydrin. The epoxy resin (epoxy compound) preferably has a molecular weight of about 300 to 5,000.

Examples of the epoxy compound having three or more epoxy groups include a novolak-based epoxy resin obtained by reacting a phenol novolak resin or a cresol novolak resin with epichlorohydrin, triglycidyl isocyanurate, tris (α-methylglycidyl) Isocyanurate, tris (β-methylglycidyl) isocyanurate, tris (hydroxyphenyl)
Examples include methane triglycidyl ether, 1,3,5-tri (glycidyloxy) benzene, and 1,3,5-trimesic acid triglycidyl ester. Polyol polyglycidyl ethers such as glycerin polyglycidyl ether, pentaerythritol polyglycidyl ether, and trimethylolpropane polyglycidyl ether can also be used in combination with these epoxy compounds as aliphatic epoxy compounds.

The amount of the epoxy compound (E) is from 90 to 9% of the polyester resin component in the polyester resin composition.
0.1 to 10% by weight, preferably 0.3 to 5% by weight, based on 9.9% by weight. If it exceeds 10% by weight,
Care must be taken because the mechanical properties tend to decrease.

The method of mixing the polyester resin component and the epoxy compound (E) to form a composition is not particularly limited, and a known method can be used. For example, melt kneading can be performed using a single-screw or twin-screw extruder, various kneaders, or the like. In particular, biaxial high-speed kneading is preferred. In melt kneading, the cylinder set temperature of the kneader is preferably 200 to 360 ° C., more preferably 23 to 360 ° C.
0-350 ° C.

The molding method for molding the polyester resin composition of the present invention is not particularly limited, and may be formed by applying various molding methods such as a blow molding method, an extrusion molding method and a calendering method. You can get the body.

Further, in order to give more specific performance to the molded article made of the polyester resin composition of the present invention, an appropriate additive can be added to the polyester resin composition. The additive is usually blended when the polyester resin component and the epoxy compound are mixed. Further, after the polyester resin composition is molded, the molded article may be subjected to various conventionally known processings. Examples of the additives include resins such as polyether, polyamide, polyolefin, and polymethyl methacrylate; inorganic particles such as silica, talc, kaolin, and calcium carbonate; titanium oxide;
Pigments such as carbon black; ultraviolet absorbers; release agents;
Antistatic agents; flame retardants and the like. Examples of processing include irradiation with ultraviolet rays, α-rays, β-rays, γ-rays, or electron beams; treatments such as corona treatment, plasma irradiation treatment, and flame treatment; resins such as vinylidene chloride, polyvinyl alcohol, polyamide, and polyolefin. Coating; laminating; surface treatment by vapor deposition of metal;

[0028]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. Example 1 490.6 g of terephthalic acid, 28.3 g of hydroxydicarboxylic acid 1 shown in Table 1, 270.3 g of ethylene glycol, and 400 g of polytetramethylene glycol having a weight-average molecular weight of 1,000 were charged into a reaction vessel.
The esterification reaction was carried out by heating and stirring at 90 to 225 ° C for 3 hours. Then, the temperature was raised to 280 ° C., and 0.4 g of antimony trioxide was added as a polymerization catalyst to progress the polymerization reaction. The intrinsic viscosity η of the obtained polyester resin component is 0.1.
98. The intrinsic viscosity η was measured in a mixed solvent of phenol / tetrachloroethane equivalent at 25 ° C. The polyester resin component was dried at 130 ° C. for 8 hours with respect to 99 parts by weight of pellets, and then TEPIC- manufactured by Nissan Chemical Industries, Ltd.
L (epoxy compound) was kneaded at 280 ° C. and 200 rpm using a 40φ twin screw extruder at 280 ° C.
ASTM-D63 comprising a polyester resin composition
Eight test pieces were injection molded. For this test piece, the tensile strength, Izod impact test, Shore A
The hardness, high-temperature shape retention, molded appearance, and chemical resistance were evaluated. Table 1 shows the results together with the composition of the polyester resin composition.
It was shown to.

Tensile strength: according to ASTM-D638. Izod impact test: based on ASTM-D256. Shore A hardness: based on ASTM-K7215. High-temperature shape retention: The dynamic viscoelasticity measured by DMS was used to calculate the change in elastic modulus between room temperature and 170 ° C based on the following equation. (Dynamic elastic modulus at 170 ° C.) / (Dynamic elastic modulus at 23 ° C.) *
100 (%) Molded appearance, chemical resistance: Polyester resin composition 40φ
The appearance of a sheet formed into a sheet having a thickness of 200 μm by a single screw extruder and a T-die method, and the sheet surface was measured at 23 ° C.
After rubbing with acetone, the change in appearance was visually evaluated.

Example 2: 488.0 g of terephthalic acid, 31.2 g of hydroxydicarboxylic acid 2 shown in Table 1, 268.9 g of ethylene glycol, and a weight average molecular weight of 100
400 g of polytetramethylene glycol of No. 0 and 0.49 g of tetra-n-butoxytitanium as a catalyst were charged into a reaction vessel, a transesterification reaction was performed, and then a polymerization reaction was allowed to proceed. Intrinsic viscosity η of the obtained polyester resin component
Was measured by the same method as in Example 1, and found to be 0.96
Met. This polyester resin component was added at 130 ° C. for 8
A polyester resin composition obtained by kneading 1 part by weight of TEPIC-L (epoxy compound) manufactured by Nissan Chemical Co., Ltd. to 99 parts by weight of pellets dried for one hour was evaluated in the same manner as in Example 1, and the result was evaluated by polyester. The results are shown in Table 1 together with the composition of the resin composition.

Example 3: Dimethyl terephthalate 547.
0 g, 4.3 g of the methyl ester of hydroxydicarboxylic acid 2 shown in Table 1, 1,4-butanediol 199.
1 g, 400 g of polytetramethylene glycol having a weight-average molecular weight of 1000 was charged into a reaction vessel, and an esterification reaction was performed. Then, 0.4 g of antimony trioxide was used as a polymerization catalyst.
Was added to advance the polymerization reaction. The intrinsic viscosity η of the obtained polyester resin component was measured by the same method as in Example 1 and was found to be 1.10. A polyester resin composition obtained by kneading 1 part by weight of TEPIC-L (epoxy compound) manufactured by Nissan Chemical Co., Ltd. with 99 parts by weight of pellets obtained by drying the polyester resin component at 130 ° C. for 8 hours,
Evaluation was performed in the same manner as in Example 1. The results are shown in Table 1 together with the composition of the polyester resin composition.

Example 4: dimethyl terephthalate 700.
4 g, 3.8 g of methyl ester of hydroxydicarboxylic acid 1 shown in Table 1, 1,4-butanediol 411.
2 g, 200 g of polytetramethylene glycol having a weight average molecular weight of 2,000, and 1.46 of trimethylolpropane.
g, 0.70 g of tetra-n-butoxytitanium as a catalyst
Was charged into a reaction vessel, a transesterification reaction was performed, and then a polymerization reaction was allowed to proceed. The intrinsic viscosity η of the obtained polyester resin component was measured by the same method as in Example 1.
1.00. This polyester resin component is
A polyester resin composition obtained by kneading 6 parts by weight of TEPIC-L (epoxy compound) manufactured by Nissan Chemical Co., Ltd. to 94 parts by weight of pellets dried at 0 ° C. for 8 hours was evaluated in the same manner as in Example 1. The results are shown in Table 1 together with the composition of the polyester resin composition.

Example 5: Dimethyl terephthalate
5 g, 10.4 g of the methyl ester of hydroxydicarboxylic acid 2 shown in Table 1, and 1,4-butanediol 25
6.5 g, 250 g of polytetramethylene glycol having a weight average molecular weight of 1000, 250 g of polytetramethylene glycol having a weight average molecular weight of 2000, and 0.44 g of tetra-n-butoxytitanium as a catalyst were charged into a reaction vessel.
An ester exchange reaction was performed, and then a polymerization reaction was allowed to proceed. When the intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1, it was 1.15.
A polyester resin composition obtained by kneading 0.5 part by weight of TEPIC-L (epoxy compound) manufactured by Nissan Chemical Co., Ltd. with respect to 99.5 parts by weight of pellets obtained by drying the polyester resin component at 130 ° C. for 8 hours, Evaluation was performed in the same manner as in Example 1. The results are shown in Table 1 together with the composition of the polyester resin composition.

Comparative Example 1: 845.5 g of terephthalic acid, 18.9 g of hydroxydicarboxylic acid 1 shown in Table 1 and 451.6 g of ethylene glycol were charged into a reaction vessel, and an esterification reaction was carried out. The polymerization reaction was allowed to proceed by adding 0.30 g of antimony oxide. The intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1, and was found to be 0.77. This polyester resin component was dried at 130 ° C. for 8 hours.
The results were shown in Table 1 together with the composition of the polyester resin component.

Comparative Example 2: Dimethyl terephthalate 528.
9 g, 1,4-butanediol 309.0 g, weight average molecular weight 1000, polytetramethylene glycol 400
g, 0.52 g of tetra-n-butoxytitanium as a catalyst
Was charged into a reaction vessel, a transesterification reaction was performed, and then a polymerization reaction was allowed to proceed. When the intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1,
It was 0.86. This polyester resin component is
A polyester resin composition obtained by kneading 1 part by weight of TEPIC-L (epoxy compound) manufactured by Nissan Chemical Co., Ltd. to 99 parts by weight of pellets dried at 0 ° C. for 8 hours was evaluated in the same manner as in Example 1. The results are shown in Table 1 together with the composition of the polyester resin composition.

Comparative Example 3: 650.7 g of terephthalic acid, 41.7 g of hydroxydicarboxylic acid 2 shown in Table 1, 358.5 g of ethylene glycol, and a weight average molecular weight of 100
After charging 200 g of polytetramethylene glycol of No. 0 into a reaction vessel and performing an esterification reaction, 0.4 g of antimony trioxide was added as a polymerization catalyst to progress the polymerization reaction. When the intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1, it was 0.47. The polyester resin component was dried at 130 ° C. for 8 hours and evaluated in the same manner as in Example 1. The results are shown in Table 1 together with the composition of the polyester resin component.

Comparative Example 4: 213.5 g of terephthalic acid, 2.6 g of hydroxycarboxylic acid 2 shown in Table 1, 112.9 g of ethylene glycol, and 750 g of polytetramethylene glycol having a weight average molecular weight of 1,000 were charged into a reaction vessel, and the ester was added. After the polymerization reaction, 0.4 g of antimony trioxide was added as a polymerization catalyst, and the polymerization reaction was allowed to proceed. The intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1, and was found to be 0.58.
The polyester resin component was dried at 60 ° C. for 48 hours, and 99 parts by weight of pellets were obtained from TEPI manufactured by Nissan Chemical Industries, Ltd.
A polyester resin composition obtained by kneading 0.5 part by weight of CL (epoxy compound) was evaluated in the same manner as in Example 1,
Table 1 shows the results together with the composition of the polyester resin composition.
It was shown to.

Comparative Example 5: 580.9 g of terephthalic acid, 112.2 g of hydroxydicarboxylic acid 1 shown in Table 1,
357.4 g ethylene glycol, weight average molecular weight 20
After 200 g of polytetramethylene glycol of Example No. 00 was charged into the reaction vessel and subjected to an esterification reaction, 0.4 g of antimony trioxide was added as a polymerization catalyst, and the polymerization reaction was carried out.

Comparative Example 6: 674.1 g of terephthalic acid, 352.8 g of ethylene glycol, weight average molecular weight 200
Then, 200 g of polytetramethylene glycol of No. 0 was charged into a reaction vessel, and an esterification reaction was performed. Then, 0.4 g of antimony trioxide was added as a polymerization catalyst to progress the polymerization reaction. When the intrinsic viscosity η of the obtained polyester resin component was measured in the same manner as in Example 1, it was 1.02. This polyester resin component was added to Nissan Chemical Co., Ltd. T
A polyester resin composition obtained by kneading 20 parts by weight of EPIC-L (epoxy compound) was evaluated in the same manner as in Example 1, and the results are shown in Table 1 together with the composition of the polyester resin composition.

[0040]

[Table 1]

In Table 1, NB means that there is no impact fracture. As can be seen from the results shown in Table 1, the polyester resin compositions of Examples 1 to 5 according to the present invention were obtained in Comparative Examples 1 to 5.
6 compared to those of mechanical properties (impact resistance), heat resistance,
It has good flexibility, chemical resistance, etc., and is well-balanced and excellent, and the appearance of the molded article is also good.

[0042]

As described above, the polyester resin composition of the present invention has good heat resistance while maintaining the physical properties such as the excellent mechanical properties of the conventional polyester elastomer. Therefore, it is an excellent material suitable for blow moldability or the like that requires heat resistance. That is, the polyester resin composition of the present invention can satisfy the high mechanical properties and durability without impairing the processability, heat resistance, and chemical resistance of the polyester resin, and also has a good appearance of the molded article. Blow moldings for parts such as pipes and tubes, and also useful for applications such as moldings by extrusion molding methods such as bottles, boots, plates, inflation films and laminate coatings, films and sheets. Can be obtained.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shin Tokumizu 4-1-2 Ushikawadori, Toyohashi-shi, Aichi F-term in the Toyohashi Works of Mitsubishi Rayon Co., Ltd. 4J002 BB005 BG065 CD012 CD042 CD052 CD062 CD082 CD112 CD142 CF041 CF051 CF061 CF081 CF091 CF101 CF141 CF181 CH005 CL005 FD010 FD050 FD090 FD100 FD130 FD160 4J029 AA05 AB07 AC02 AD01 AE01 BA02 BA03 BA05 BA08 BA10 BD03A BD06A BF09 BF18 BF25 BF26 BF27 BG23A CC02 CA06 CD02 DB12 FC03 FC05 FC08 FC16 FC35 FC36 FC43 HA01 HB01 HB02

Claims (2)

[Claims] 1. A dicarboxylic acid component, (B) a diol component, (C) a polyoxyalkylene glycol component having a weight average molecular weight of 400 to 3,000, (D) a general formula (1) shown below. Consisting of a hydroxydicarboxylic acid component represented by the formula:
(E) 90 to 99.9% by weight of a polyester resin component having an intrinsic viscosity of 0.5 dl / g or more as measured in a mixed solvent of phenol / tetrachloroetaene at equivalent temperature of at least 2%. A polyester composition containing 0.1 to 10% by weight of an epoxy compound containing at least one epoxy group, wherein the component (C) is a polyester resin component having a content of 5 to 65%.
The polyester resin composition, wherein the component (D) is contained in an amount of 0.1 to 10 mol% with respect to all the acid components in the polyester resin component. 2. A molded article obtained by molding the polyester resin composition according to claim 1.