JP2015030790A - Copolymerized polytrimethylene terephthalate resin, and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a copolymerized polytrimethylene terephthalate resin excellent in mechanical characteristics such as tensile elongation and heat shock resistance.SOLUTION: The method for producing the copolymerized polytrimethylene terephthalate resin comprises the steps of: subjecting a mixture, which contains (a) terephthalic acid or Calcohol ester thereof, (b) 1,3-propanediol, and (c) 1,4-butanediol and has 0.06-0.15 molar ratio of the amount of the (c) component to the total amount of the (b) component and the (c) component and 1.20-2.50 molar ratio of the total amount of the (b) component and the (c) component to the amount of the (a) component, to melt polycondensation to obtain a product; keeping the product in a solid state for a while; subjecting the product of a solid phase state to a polymerization reaction; pelletizing a reaction product to obtain pellets each having the melt index of 1-30 g/10 minutes when measured at 235°C under 2.16 kg load; and melting/kneading the pellets.

Description

  The present invention relates to a copolymerized polytrimethylene terephthalate resin having excellent mechanical properties and a method for producing the same.

  Aromatic polyester resins represented by polyethylene terephthalate (PET) resin and polybutylene terephthalate (PBT) resin are widely used as engineering plastics due to their excellent heat resistance and balanced physical properties such as mechanical properties. It is heavily used in.

  On the other hand, as an aromatic polyester resin, a polytrimethylene terephthalate (PTT) resin is known in addition to PET and PBT. The PTT resin is an aromatic polyester resin using a diol having a carbon number of 3 (1,3-propanediol) as a raw material monomer diol. From the viewpoint of the carbon number of the raw material monomer diol, a PET resin and a PBT resin (each raw material) It is located in the middle of the carbon number 2, 4) of the monomer diol. At present, the main use of the PTT resin is that which can be produced by extrusion such as fibers. For example, in the field of extrusion molding of PTT resin, various studies have been made in order to improve transparency and heat resistance (see, for example, Patent Documents 1 to 3). The reason is that the PTT resin itself has characteristics such as low warpage in the injection molding field, but has insufficient mechanical properties such as tensile elongation and heat shock resistance. For this reason, improvement of the mechanical property of PTT resin has been desired.

Japanese Patent Laid-Open No. 4-153021 Japanese Patent Laid-Open No. 5-92468 JP-A-4-212929

However, in the past, the improvement in mechanical properties was not sufficient, and there was room for further improvement. If the PTT resin can improve mechanical properties such as tensile elongation and heat shock resistance, maintain low warpage, and can be used for injection molding, it can be applied to a wide range of applications.
The present invention has been made in view of the above prior art, and its purpose is a copolymer polytrimethylene terephthalate resin excellent in mechanical properties such as tensile elongation and heat shock resistance and excellent in low warpage and its It is to provide a manufacturing method.

The present invention for solving the above problems is as follows.
(1) (a) terephthalic acid or its C _1-3 alcohol ester, (b) 1,3-propanediol, and (c) 1,4-butanediol, the component (b) and the component (c) ) The ratio of the amount of the component (c) to the total amount of the component is 0.06 to 0.15 in molar ratio, and the component (b) and the component (c) with respect to the amount of the component (a) A product obtained by melt polycondensation of a mixture having a total amount ratio of 1.20 to 2.50 in a molar ratio is once converted into a solid state, and then subjected to a polymerization reaction in a solid phase state at 235 ° C. and 2.16 kg. A method for producing a copolymerized polytrimethylene terephthalate resin, comprising a step of melt-kneading the pellet after the pellet has a melt index of 1 to 30 g / 10 min under load.

(2) A copolymerized polytrimethylene terephthalate resin obtained by the method for producing a copolymerized polytrimethylene terephthalate resin described in (1).

(3) A copolymerized polytrimethylene terephthalate resin composition comprising the copolymerized polytrimethylene terephthalate resin according to (2) above and a lubricant and / or stabilizer.

(4) The copolymerized polytrimethylene terephthalate resin composition as described in (3) above, further comprising glass fibers.

(5) The copolymerized polytrimethylene terephthalate resin composition according to (4), further including an elastomer.

(6) The copolymerized polytrimethylene terephthalate resin composition according to (4) or (5), further including an amorphous resin.

(7) An insert molded product obtained by insert molding using the copolymerized polytrimethylene terephthalate resin composition according to (5) or (6).

  According to the present invention, it is possible to provide a copolymerized polytrimethylene terephthalate resin excellent in tensile elongation, heat shock resistance, and low warpage and a method for producing the same.

It is the graph which plotted the relationship of the tensile elongation with respect to the melt index in each resin. It is a top view which shows the test piece used for the measurement of flatness.

<Method for producing copolymerized polytrimethylene terephthalate>
The production method of the copolymerized polytrimethylene terephthalate resin (hereinafter also referred to as “copolymerized PTT resin”) of the present invention is as follows: (a) terephthalic acid or its C _1-3 alcohol ester, (b) 1,3- Propanediol and (c) 1,4-butanediol are included, and the ratio of the amount of the component (c) to the total amount of the component (b) and the component (c) is 0.06-0. 15 and obtained by melt polycondensation of a mixture in which the ratio of the total amount of the component (b) and the component (c) to the amount of the component (a) is 1.20 to 2.50 in molar ratio. The obtained product is once converted into a solid state, and then subjected to a polymerization reaction in a solid phase to form pellets having a melt index of 1 to 30 g / 10 min at 235 ° C. and 2.16 kg load (21.2 N). Including the process of melting and kneading It is characterized by that.

The copolymerized PTT resin obtained by the production method of the present invention is a resin obtained by copolymerizing the monomers (a) to (c) as described above. In other words, the polytrimethylene terephthalate resin is 1,4. -Resin modified with butanediol. That is, a part of 1,3-propanediol, which is a raw material monomer of polytrimethylene terephthalate resin, is copolymerized as 1,4-butanediol. In the production method of the present invention, 1,3-propanediol and 1,4-butanediol are used at a predetermined ratio, and through a predetermined process, the tensile force is higher than that of the polytrimethylene terephthalate resin itself. Resins excellent in mechanical properties such as elongation and heat shock resistance can be produced. As a result, molding methods such as injection molding and insert molding can be used, and the application range of the resin can be greatly expanded.
Below, the manufacturing method of this invention is explained in full detail.

First, a mixture containing (a) terephthalic acid or its C _1-3 alcohol ester, (b) 1,3-propanediol, and (c) 1,4-butanediol is prepared.
As the component (a), terephthalic acid or a C _1-3 alcohol ester thereof is used. When terephthalic acid is used, a copolymerized PTT resin is obtained by polycondensation after the esterification reaction. When a C1 to _C3 alcohol ester of terephthalic acid is used, a copolymerized PTT resin is obtained by polycondensation after the ester exchange reaction.
_Examples of the C _1-3 alcohol ester include dimethyl terephthalate, diethyl terephthalate, and dipropyl terephthalate. Among them, dimethyl terephthalate is particularly preferable.

  Moreover, especially as (b) component, the thing derived from a plant is preferable from a viewpoint of environmental load reduction. Specifically, 1,3-propanediol can be obtained by hydrolyzing the fatty acid ester of glycerin generated during the purification process of biodiesel, and further reducing the hydroxyl group bonded to the central carbon atom. b) Can be used as a component. It can also be obtained by other known methods.

In the present invention, in preparing the mixture, the ratio of the amount of the component (c) to the total amount of the component (b) and the component (c) is set to a molar ratio (hereinafter also referred to as “molar ratio A”) of 0. The ratio of the total amount of the component (b) and the component (c) to the amount of the component (a) is 1.20 to 2 in terms of a molar ratio (hereinafter also referred to as “molar ratio B”). .50.
When the molar ratio A is less than 0.06, the effect of improving the tensile elongation and heat shock resistance is small, and when it exceeds 0.15, the releasability is lowered due to a decrease in the crystallization speed, and the moldability becomes poor. The molar ratio A is preferably 0.07 to 0.14, and more preferably 0.08 to 0.13.
On the other hand, when the molar ratio B is less than 1.20, the polymerization rate is remarkably reduced, and when it exceeds 2.50, the excess components (b) and (c) remain unreacted and are economical in production. Sex is reduced. The molar ratio B is preferably 1.30 to 2.30, and more preferably 1.40 to 2.10.

  The mixture can be mixed at any stage before charging into the reaction tank, simultaneously with charging into the reaction tank, or after charging into the reaction tank. The reaction tank may be either a batch type or a continuous type, and may include known ones such as a vertical stirring polymerization tank and a horizontal stirring polymerization tank.

  The reaction catalyst can be added to the mixture at any stage, and the reaction catalyst is added to the component (a), the component (b), the component (c), or a plurality of components before mixing. You can also. Subsequently, after addition of a reaction catalyst, an esterification reaction or a transesterification reaction is performed, and a polycondensation reaction is further performed to obtain a copolymerized PTT resin.

  Examples of the reaction catalyst used in the present invention include titanium compounds such as tetrabutyl titanate, tetrapropyl titanate, hydrolyzate of titanium tetrachloride, tin compounds such as dibutyltin oxide, dibutyltin acetate, and dioctyltin diacetate. Conventionally known catalysts can be used.

The transesterification reaction using _C1-3 alcohol ester of terephthalic acid as the main ingredient as the acid component is carried out while removing _C1-3 alcohol such as methanol which is continuously produced. In this case, the catalyst can be added in several times during the reaction as required. The reaction temperature of the transesterification reaction can be increased to 230 ° C. Moreover, the preferable reaction time in transesterification is 0.5 to 5 hours.

  Further, the esterification reaction using terephthalic acid as a main raw material as an acid component is carried out while continuously removing water. Also in this case, the addition of the catalyst can be divided into several times during the reaction as required. The reaction temperature of the esterification reaction can be increased to 250 ° C. Moreover, the preferable reaction time in esterification reaction is 0.5 to 5 hours.

  In the polycondensation reaction, the product obtained by the transesterification reaction or esterification reaction is reduced in pressure to 190-270 ° C., and excess 1,3-propanediol, 1,4-butanediol, and reaction byproducts are removed. While continuously removing, melt polymerization is performed until a desired degree of polymerization is obtained. The preferred degree of reduced pressure in the polycondensation reaction is 1 to 500 Pa, and the preferred reaction time is 0.1 to 10 hours. As a catalyst for obtaining a practical reaction rate in the polycondensation reaction, the catalyst used in the transesterification reaction or esterification reaction can be used as it is, and in order to improve the polycondensation reaction rate, polycondensation is possible. It is also possible to add one or more of these before starting the reaction. It is also possible to add conventionally known stabilizers such as sterically hindered phenols and phosphorus compounds to the monomer preparation stage or polymerization stage.

Next, the product of the melt polycondensation reaction obtained as described above is once brought into a solid state. Examples of the solid state include leaving it at room temperature, bringing it into contact with a fluid such as air or an inert gas, cooling it, putting it in water to cool it, and putting it in a refrigerator.
Furthermore, after making into a solid state, a polymerization reaction is performed in a solid state, and a pellet having a melt index (hereinafter also simply referred to as “melt index”) at 235 ° C. and a load of 2.16 kg is 1 to 30 g / 10 min. To do. In the polymerization reaction in the solid phase, the polymerization conditions (temperature, time, pressure, atmosphere (inert gas)) are set so that the melt index falls within the specified range. For example, the temperature can be 175 to 215 ° C., and the time can be 0.5 to 200 hours.
If the melt index is less than 1 g / 10 min, the fluidity of the resin will be significantly reduced and the moldability will deteriorate, and if it exceeds 30 g / 10 min, the improvement in tensile elongation and heat shock resistance will be insufficient. Become. The melt index is preferably 2 to 25 g / 10 minutes, and more preferably 3 to 20 g / 10 minutes.

  Next, the pellets obtained as described above are melt-kneaded. Examples of the melt kneading equipment include a single screw extruder, a multi-screw extruder including a twin screw extruder, a heat melt kneader using a roll, a kneader, a brabender, a Banbury mixer, etc. The machine is particularly preferred. The melt kneading temperature and screw rotation speed are not particularly limited, but the melt kneading temperature can be 200 to 270 ° C. and the screw rotation speed can be 10 to 1000 rpm.

<Copolymerized polytrimethylene terephthalate resin>
The copolymerized polytrimethylene terephthalate resin of the present invention is a resin obtained by the above-described method for producing the copolymerized polytrimethylene terephthalate resin of the present invention. That is, as described above, since it is a copolymerized PTT resin obtained by the production method of the present invention, it is a resin excellent in mechanical properties such as tensile elongation and heat shock resistance. The molecular structure of the copolymerized PTT resin of the present invention has a structure in which a butylene terephthalate unit is incorporated in a repeating unit of a main chain trimethylene terephthalate unit. It has a chain structure. The butylene terephthalate unit may be formed at the terminal position of the main chain.

<Copolymerized polytrimethylene terephthalate resin composition>
The copolymerized polytrimethylene terephthalate resin composition of the present invention is characterized by containing the above-described copolymerized polytrimethylene terephthalate resin of the present invention and a lubricant and / or stabilizer.
As the lubricant, fatty acid ester waxes such as glycerin esters, polyglycerin esters and sorbitol esters of long chain fatty acids, polyolefin waxes such as polyethylene wax, polypropylene wax and ethylene copolymer wax are preferably used. The lubricant is preferably added in an amount of 0.01 to 10 parts by mass with respect to 100 parts by mass of the resin.
As the stabilizer, an antioxidant, a hydrolysis resistance improver, a light resistance stabilizer, an antiaging agent, and the like are preferably used. Moreover, conventionally well-known compounds, such as a carbodiimide compound and an epoxy compound, are mentioned as a hydrolysis resistance improving agent. The stabilizer is preferably added in an amount of 0.01 to 10 parts by mass with respect to 100 parts by mass of the resin.

The copolymerized PTT resin composition of the present invention preferably further contains glass fibers for the purpose of improving mechanical strength. Various known glass fibers can be used as the glass fibers. Moreover, there is no limitation about a fiber diameter, a shape, and the raw material of glass, It can use suitably selecting considering an application etc. It is preferable that the said glass fiber adds 1-300 mass parts with respect to 100 mass parts of resin.
The copolymerized PTT resin composition of the present invention further contains an elastomer in addition to glass fiber when heat shock resistance (durability when exposed alternately to high and low temperatures) is required. It is preferable. Examples of elastomers include thermoplastic elastomers and core-shell elastomers. Specific examples of the thermoplastic elastomer include grafted olefin elastomers, styrene elastomers, and polyester elastomers. The elastomer is preferably added in an amount of 1 to 50 parts by mass with respect to 100 parts by mass of the resin.

  The copolymerized PTT resin composition of the present invention preferably further contains an amorphous resin when it is necessary to improve the warpage of the molded product. As the amorphous resin, styrene resins such as acrylonitrile-styrene resin, polycarbonate resins, polyester resins, polyamide resins and the like are preferably used. The amorphous resin is preferably added in an amount of 1 to 50 parts by mass with respect to 100 parts by mass of the resin.

  In this invention, you may mix | blend components other than the said component in the range which does not prevent the effect of this invention. Such components include polymers such as carbon black, nucleating agents, flame retardants, flame retardant aids, UV absorbers, plasticizers, pigments, dyes, colorants, antistatic agents, foaming agents, and other resins. , Inorganic fillers, organic fillers, additives and the like.

<Insert molded product>
The insert molded product of the present invention is formed by insert molding using the copolymerized polytrimethylene terephthalate resin composition of the present invention (glass fiber and elastomer are essential, and if necessary, an amorphous resin is included). It is characterized by.
Since the insert-molded product of the present invention is insert-molded using the copolymerized PTT resin composition of the present invention, it has excellent heat shock resistance in addition to mechanical properties such as tensile properties.

  The insert molded product of the present invention is a composite molded body in which a metal or the like is mounted in advance on a molding die, and the copolymer PTT resin composition is filled on the outside thereof. As a molding method for filling the resin into the mold, there are an injection method, an extrusion compression molding method, and the like, and an injection molding method is general. In addition, since the material to be inserted into the resin is used for the purpose of taking advantage of its characteristics and compensating for the defects of the resin, a material that does not change its shape or melt when it comes into contact with the resin during molding is used. For this reason, mainly used are metals such as aluminum, magnesium, copper, iron, brass and their alloys, and inorganic solids such as glass and ceramics, which are pre-formed into flat shapes, bars, pins, screws, etc. Is done.

  The insert-molded product of the present invention can be applied to a member that requires heat shock resistance. Examples of such members include ignition-related parts, distributor parts, various sensor parts, various actuator parts, throttle parts, power module parts, ECU parts, various connector parts, and the like.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

[Examples 1 and 2, Comparative Examples 1 to 11]
In each of the examples and comparative examples, (a) dimethyl terephthalate, (b) 1,3-propanediol, and (c) 1,4-butanediol are in parts (parts by mass) shown in Table 1 below. The mixture was introduced into a reaction vessel and blended, and further, tetrabutyl titanate as a catalyst was added to perform a transesterification reaction at 150 to 230 ° C. while removing continuously generated methanol. Subsequently, a polycondensation reaction was performed under the conditions of a reaction temperature: 250 ° C. and a reaction pressure: 10 Pa, and the obtained molten product was cooled in water to make a solid pellet once. Next, a polymerization reaction was performed in a solid phase (polymerization time is shown in Table 1). Furthermore, the obtained pellets were melt-kneaded to prepare materials. In Example 2, a predetermined amount of boron nitride powder was added as a nucleating agent. Using the obtained material, a test piece for use in the following evaluation test was obtained. In Tables 1 to 3, “1,3-PD” represents 1,3-propanediol, and “1,4-BD” represents 1,4-butanediol.
In addition, after each polycondensation reaction, after solid-phase polymerization, and after melt-kneading, the melt index (g / 10 min) at 235 ° C. and 2.16 kg load (21.2 N) is determined in accordance with ASTM-D1238. It was measured.

[Evaluation]
(1) Tensile strength Tensile strength (MPa) was evaluated based on ISO527-1,2.

(2) Tensile elongation Based on ISO527-1,2, the tensile elongation (%) was evaluated.

(3) Bending strength Based on ISO178, bending strength (MPa) was evaluated.

(4) Flexural modulus Based on ISO178, the flexural modulus (MPa) was evaluated.

(5) Charpy impact strength Charpy impact strength (notched) (kJ / m ² ) was measured according to ISO 179 / 1eA.

  From Table 1, it can be seen that in Examples 1 and 2, the tensile elongation is extremely improved while maintaining the tensile strength, bending strength, flexural modulus, and Charpy impact strength at high values. On the other hand, Comparative Examples 1 and 10 do not include the step of melting and kneading, so that the solidification rate of the resin is lowered and the mold release property is lowered. Further, Comparative Example 2 does not include a solid phase polymerization step, and the melt index is outside the numerical range of the present invention, so that the tensile elongation improving effect is small. Moreover, in the comparative example 3, since the melt index of the pellet used for a melt-kneading process is less than the lower limit of the numerical range of the present invention, the flowability of the resin is remarkably lowered, resulting in poor moldability. Further, in Comparative Example 4, since the ratio of the total amount of the component (b) and the component (c) to the amount of the component (a) is less than the lower limit of the numerical range of the present invention, the decrease in the polymerization rate becomes remarkable, resulting in poor polymerization. It has become. In Comparative Examples 5 to 9, since the ratio of the amount of the component (c) to the total amount of the components (b) and (c) is less than the lower limit of the numerical range of the present invention, the effect of improving the tensile elongation is small. . In Comparative Example 11, since the ratio of the amount of the component (c) to the total amount of the components (b) and (c) exceeds the upper limit of the numerical range of the present invention, the releasability is reduced due to the decrease in the crystallization speed. The moldability is deteriorated.

On the other hand, for each of the following resins (1) to (5), the tensile elongation was measured in the same manner as in Example 1 for each numerical value of the melt index. In the graph of FIG. 1, the relationship between the tensile elongation and the melt index in each resin is plotted.
(1) PTT resin itself not modified with 1,4-butanediol (homo PTT resin)
(2) Copolymer PTT resin in which the molar ratio of component (c) to the total amount of component (b) and component (c) is 0.05 (3) Copolymer PTT resin having the same molar ratio of 0.1 (4) Copolymer PTT resin other than the present invention in which the molar ratio of the amount of dimer diol to the total amount of component (b) and dimer diol is 0.02 (5) Homo PBT resin

[Example 3, Comparative Examples 12-14]
With the component composition shown in Table 2, the polymer obtained in the same manner as in Example 1 and the additives shown in Table 2 were melt-kneaded to obtain a resin composition. Subsequently, the resin composition obtained in the rectangular metal block was insert-molded by an injection molding machine. After the insert molding, the obtained molded product was put into the following testing machine, subjected to a heat cycle under the following conditions, and the heat shock resistance was evaluated by confirming the state of destruction.
Testing machine: ESPEC TSA-101S-W
Conditions: −40 ° C. (1.5 h) １４０ 140 ° C. (1.5 h)
Using 5 samples for each composition, cracks were confirmed every 20 cycles, and the number of cycles at which all cracks occurred was taken as the number of fracture cycles. The results are shown in Table 2.
Details are shown below.
Elastomer: NOF Corporation, Modiper A5300
Bisphenol A type epoxy resin: manufactured by Mitsubishi Chemical Corporation, Epicoat JER1004K
Antioxidant: Tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane, manufactured by Sumitomo Chemical Co., Ltd., Sumilyzer BP101
Glass fiber: Nitto Boseki Co., Ltd., CS 3J-948
In addition, the copolymer PTT polymer of Example 3 used the same thing as Example 1, and the comparative example 14 used the homo PBT resin (melt index 72g / 10min) by Wintech Polymer Co., Ltd.

  From Table 2, Example 3 insert-molded with the copolymerized PTT resin composition is superior in heat shock resistance compared to Comparative Examples 12 to 14 using the homo PTT resin composition and the homo PBT resin composition. I understand that.

[Example 4, Comparative Examples 15 to 16]
It melt-kneaded with the component composition (The numerical value of each component shows a mass part) shown in Table 3, and obtained the resin composition. Subsequently, in order to compare the warpage after annealing of the copolymerized PTT resin composition of the present invention (Example 4), the homo PTT resin composition (Comparative Example 15), and the homo PBT resin composition (Comparative Example 16). Each resin composition was molded into a plate-shaped test piece of 80 mm × 80 mm × 1.5 mm (holding pressure 70 MPa), and the warpage after annealing at 190 ° C. for 1 hour was measured and evaluated. The warpage was evaluated by measuring nine points shown in FIG. 2 with a three-dimensional measuring machine (manufactured by Mitutoyo Corporation) and determining the difference in height between the highest point and the lowest point. The results are shown in Table 3. The copolymerized PTT resin used in Example 4 is the same as that obtained in Example 1. As the homo PTT resin of Comparative Example 15, the same polymer as that used in Comparative Example 12 was used. As the homo PBT resin of Comparative Example 16, the same polymer as that used in Comparative Example 14 was used.
On the other hand, the detail of an additive is shown below.
AS resin: acrylonitrile-styrene resin, UMG ABS Co., Ltd., UMG AXS resin AP-20
Glass fiber: manufactured by Nippon Electric Glass Co., Ltd., ECS 03 T-187
Antioxidant: Tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane, manufactured by Sumitomo Chemical Co., Ltd., Sumilyzer BP101
Mold release agent: sorbitan fatty acid ester, manufactured by Riken Vitamin Co., Ltd., Riquemar B-150

  From Table 3, the copolymer PTT resin composition of Example 4 had the same warp as the homo PTT resin composition of Comparative Example 15, and was less than the warp of the PBT resin composition of Comparative Example 16.

Claims (7)

(A) terephthalic acid or _C1-3 alcohol ester thereof, (b) 1,3-propanediol, and (c) 1,4-butanediol, and the components (b) and (c) The ratio of the amount of component (c) to the total amount is 0.06 to 0.15 in molar ratio, and the total amount of component (b) and component (c) relative to the amount of component (a) A product obtained by melt polycondensation of a mixture having a molar ratio of 1.20 to 2.50 is once converted into a solid state, and then subjected to a polymerization reaction in a solid state, at 235 ° C. and a load of 2.16 kg. A method for producing a copolymerized polytrimethylene terephthalate resin, comprising a step of melt-kneading the pellets after the pellets have a melt index of 1 to 30 g / 10 min.   A copolymerized polytrimethylene terephthalate resin obtained by the method for producing a copolymerized polytrimethylene terephthalate resin according to claim 1.   A copolymerized polytrimethylene terephthalate resin composition comprising the copolymerized polytrimethylene terephthalate resin according to claim 2 and a lubricant and / or stabilizer.   The copolymerized polytrimethylene terephthalate resin composition according to claim 3, further comprising glass fibers.   The copolymerized polytrimethylene terephthalate resin composition according to claim 4, further comprising an elastomer.   The copolymerized polytrimethylene terephthalate resin composition according to claim 4 or 5, further comprising an amorphous resin.   An insert molded product formed by insert molding using the copolymerized polytrimethylene terephthalate resin composition according to claim 5.

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