JP2003201392A - Polytrimethylene terephthalate resin composition and its molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoplastic polyester resin composition which has extremely good moldability, an appearance of moldings, and mechanical properties and, simultaneously, excellent toughness and hinge properties, and the moldings. <P>SOLUTION: The resin composition comprises (A) a polytrimethylene terephthalate and (B) a higher fatty acid ester and/or a higher saturated fatty acid and/or a higher unsaturated fatty acid and/or a higher fatty acid metal salt and/or a higher fatty acid amide, and has an intrinsic viscosity [&eta;] of &ge;0.95. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electric / electronic component,
The present invention relates to a polytrimethylene terephthalate resin composition suitably used for automobile parts and other useful industrial parts, and a molded product thereof. The present invention relates to a polytrimethylene terephthalate resin composition having excellent moldability, appearance of molded products and mechanical properties, and excellent toughness and hinge properties, and molded products thereof.

[0002]

2. Description of the Related Art Thermoplastic polyester resins typified by polybutylene terephthalate and polyethylene terephthalate are excellent in molding processability, mechanical properties, chemical resistance, electrical properties, etc., and are therefore widely used in automobile parts, electric / electronic parts, etc. Widely used in the field. In recent years, in these fields, along with the high functionality of parts in which thermoplastic polyester resins are used, in addition to the excellent properties of conventional thermoplastic polyester resins, more special properties are often required. ing. Hinge characteristics are one of the functions required of such a thermoplastic polyester resin.

[0003] In particular, in recent years, from the viewpoint of cost reduction and easy recycling, there is an active movement to modularize a plurality of parts. Above all, a plurality of parts are integrated with a hinge to facilitate the assembly of the parts. It is often desired. However, the conventional thermoplastic polyester resin cannot sufficiently satisfy the requirements for these hinge characteristics. In the case of polyethylene terephthalate, ordinary molding such as injection molding (mold temperature 100 ° C
In the following), there is a problem before imparting higher thermal rigidity and dimensional stability, such as deformation of the molded product during mold release, and the resulting molded product cannot realize the original mechanical characteristics. Can't answer. On the other hand, in the case of polybutylene terephthalate, the moldability is improved as compared with polyethylene terephthalate, but the desired hinge properties are not sufficient and the market demand cannot be satisfied.

[0004]

[PROBLEMS TO BE SOLVED BY THE INVENTION] A thermoplastic polyester resin composition having excellent moldability, appearance of a molded product and mechanical properties, and excellent toughness and hinge properties, which sufficiently satisfies the market demand, and a molded product thereof. This is the subject of the present invention.

[0005]

The inventors of the present invention have conducted extensive studies to solve the above-mentioned problems, and as a result, (A) polytrimethylene terephthalate resin having a molecular weight in a specific range and (B) higher fatty acid ester and It has been found that a polytrimethylene terephthalate resin composition comprising a higher fatty acid and / or a higher fatty acid metal salt and / or a higher fatty acid, and a molded product thereof exhibit a desired improving effect. In particular, the inventors have found that a greater improvement effect is exhibited when a higher fatty acid ester is used as the component (B), and have completed the present invention.

That is, the present invention is as follows: (A) Polytrimethylene terephthalate resin 100
Parts by weight and (B) higher fatty acid ester and / or higher fatty acid and / or higher fatty acid metal salt and /
Or a polytrimethylene terephthalate resin composition comprising 0.005 to 0.5 part by weight of a higher fatty acid amide, wherein the polytrimethylene terephthalate resin composition has an intrinsic viscosity [η] of 0.95 or more. A characteristic polytrimethylene terephthalate resin composition.

2. 2. The polytrimethylene terephthalate resin composition according to 1, wherein the intrinsic viscosity [η] of the polytrimethylene terephthalate resin composition is 1.00 or more. 3. (B) is a higher fatty acid ester, The polytrimethylene terephthalate resin composition of 1 or 2 characterized by the above-mentioned. 4. (B) The poly (trimethylene terephthalate) resin composition according to 3, wherein the higher fatty acid ester is a montanic acid ester wax and / or a partially saponified montanic acid ester wax.

A molded article obtained by molding the polytrimethylene terephthalate resin composition according to any one of 5.1 to 4. 6. 6. The molded product according to 5, wherein the molded product has an intrinsic viscosity [η] of 0.95 or more. 7. 7. The molded product according to 6, wherein the molded product has an intrinsic viscosity [η] of 1.00 or more. 8. 5-7, wherein the molded product has a hinge portion
The molded product according to any one of 1. Is.

The present invention will be specifically described below.
First, (A) polytrimethylene terephthalate, which is a component of the polytrimethylene terephthalate resin composition of the present invention, will be described. Polytrimethylene terephthalate (hereinafter, may be abbreviated as PTT) in the present invention.
Indicates a polyester polymer using terephthalic acid as an acid component and trimethylene glycol as a glycol component. In the present invention, trimethylene glycol includes 1,3-propanediol, 1,2
-Propanediol, 1,1-propanediol, 2,
It is selected from 2-propanediol or a mixture thereof, and 1,3-propanediol is particularly preferable from the viewpoint of stability.

Besides, aromatic dicarboxylic acids other than terephthalic acid, such as phthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenyl ether, are used as acid components within a range that does not impair the object of the present invention. Dicarboxylic acid, diphenoxyethanedicarboxylic acid, diphenylmethanedicarboxylic acid, diphenylketone dicarboxylic acid, diphenylsulfonedicarboxylic acid, etc .; aliphatic dicarboxylic acid such as succinic acid, adipic acid, sebacic acid; alicyclic dicarboxylic acid such as cyclohexanedicarboxylic acid; Oxydicarboxylic acids such as ε-oxycaproic acid, hydroxybenzoic acid and hydroxyethoxybenzoic acid are used.

As the glycol component, ethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, octamethylene glycol, neopentyl glycol, cyclohexanedimethanol, xylylene glycol, diethylene glycol, polyoxyalkylene glycol, hydroquinone, etc. A part of them can be used for copolymerization. The amount of the copolymerization in the case of copolymerization is not particularly limited as long as the object of the present invention is not impaired, but it is generally preferably 20 mol% or less of the acid component or 20 mol% or less of the glycol component. .

In addition to the above-mentioned polyester components, branched components such as tricarballylic acid, trimesic acid, trimellitic acid and the like having trifunctional or tetrafunctional ester forming ability or glycerin, trimethylolpropane, pentaerythritol and the like. May be copolymerized with an alcohol having a trifunctional or tetrafunctional ester-forming ability, in which case they are 1.0 mol% or less, preferably 0.5 mol% or less, and more preferably of all dicarboxylic acid components. Is 0.3
It is not more than mol%. Further, PTT may be a combination of two or more of these copolymerization components.

The PTT resin composition of the present invention and its molded article preferably have an intrinsic viscosity [η] of 0.95 or more from the viewpoint of toughness and hinge characteristics, and [η] is 1.0.
It is more preferably 0 or more, and most preferably [η] is 1.10. Regarding the intrinsic viscosity [η] of the PTT resin composition and the molded article thereof described above, an Ostwald viscometer was used and the specific viscosity ηsp and the PTT resin concentration C (g / 100) in o-chlorophenol at 35 ° C.
ml) ratio ηsp / C can be extrapolated to zero concentration, and can be determined by the following formula. [Η] = lim (ηsp / C) C → 0

The method for producing PTT used in the present invention is as follows:
Although not particularly limited, for example, JP-A-51-
140992, JP-A-5-262862,
According to the method described in JP-A-8-311177, terephthalic acid or its ester-forming derivative (for example, lower alkyl ester such as dimethyl ester or monomethyl ester) and trimethylene glycol or its ester-forming derivative, In the presence of a catalyst, the mixture is heated and reacted at a suitable temperature and for a time, and the glycol ester of terephthalic acid obtained is further reacted in the presence of a catalyst at a suitable temperature and
A method of conducting a polycondensation reaction to a desired degree of polymerization in time can be mentioned.

Next, the (B) higher fatty acid ester and / or higher fatty acid and / or higher fatty acid metal salt and / or higher fatty acid amide in the present invention will be described in detail. As the higher fatty acid esters, esters of higher alcohols and higher fatty acids, esters of polyhydric alcohols and higher fatty acids, or mixtures thereof are preferably used.

As the esters of higher alcohols and higher fatty acids, preferred are esters of aliphatic alcohols having 8 or more carbon atoms and higher fatty acids having 8 or more carbon atoms. Preferred higher fatty acid esters include, for example, lauryl laurate, lauryl myristate, lauryl palmitate, lauryl stearate, lauryl behenate, lauryl lignocerate, lauryl melicate, myristyl laurate, myristyl myristate, myristyl stearate. , Myristyl behenate, myristyl lignocerate, myristyl merissate, palmityl laurate, palmityl myristate, palmityl stearate, palmityl behenate, palmityl lignocerate, palmityl melissate, stearyl laurate ,
Stearyl myristate, stearyl palmitate, stearyl stearate, stearyl behenate, stearyl arachinate, stearyl lignocerate, stearyl melissate.

Further, aicosyl laurate, aicosyl palmitate, aicosyl stearate, aicosyl behenate, aicosyl lignocerate, aicosyl mericate, behenyl laurate, behenyl myristate,
Behenyl palmitate, behenyl stearate, behenyl behenate, behenyl arachinate, behenyl melissate, tetracosanyl laurate, tetracosa palmitate, tetracosanyl stearate, tetracosanyl behenate, tetracosanyl lignoce Rate, tetracosanyl cerotate, cerotinyl stearate, cerotinyl behenate, cerotinyl cerotinate, melicyl laurate, melicyl stearate, melicyl behenate, melicyl merisate, or the like. Mention may be made of mixtures.

Partial esters of polyhydric alcohols and higher fatty acids include polyhydric alcohols such as glycerin,
1,2,3-butanetriol, 1,2,3-pentanetriol, erythritol, pentaerythritol, trimethylolpropane, mannitol, sorbitol and the like are preferably used, and higher fatty acids include, for example, capric acid, uradecyl acid, Lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, heptadecyl acid, stearic acid, nonadecanoic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melicinic acid, laxeric acid and the like are preferable. Used.

The esters of these polyhydric alcohols and higher fatty acids may be monoesters, diesters or triesters. More preferred are higher fatty acid monoglycerides such as glycerin monolaurate, glycerin monomyristate, glycerin monostearate, glycerin monobehenate, glycerin monolignocellate, glycerin monomerisate, pentaerythritol-mono or di-. Laurate, pentaerythritol-mono or di-
Laurate, pentaerythritol-mono or di-myristate, pentaerythritol-mono or di-palmitate, pentaerythritol-mono or di-stearate, pentaerythritol-mono or di-behenate, pentaerythritol-mono or di-lignocerate, penta Erythritol-a mono- or di-higher fatty acid ester of pentaerythritol such as mono- or di-merisate.

Further, trimethylolpropane-mono- or di-laurate, trimethylolpropane-mono-
Or di-myristate, trimethylolpropane-mono- or di-palmitate, trimethylolpropane-mono- or di-stearate, trimethylolpropane-mono- or di-behenate, trimethylolpropane-mono- or di-lignocerate , Trimethylolpropane-mono- or di-merisate, such as trimethylolpropane mono- or di-higher fatty acid esters, sorbitan-mono, di- or tri-laurate,
Sorbitan-mono, di- or tri-myristate, sorbitan-mono, di- or tri-stearate, sorbitan-mono, di- or tri-behenate, sorbitan-mono, di- or tri-lignocerate, sorbitan-mono, di- or tri- Sorbitan-mono, di, or tri higher fatty acid esters such as melissate.

Furthermore, mannitan-mono, di- or tri-laurate, mannitan-mono, di- or tri-
Myristate, mannitan-mono, di or tri-palmitate, mannitan-mono, di or tri-stearate, mannitan-mono, di or tri-behenate,
Mention-mono, di- or tri-lignocerate, mannitan-mono, di- or tri-meriselate and other mannitane-mono, di- or tri-higher fatty acid esters, etc., or mixtures thereof may be mentioned.

As the higher fatty acids, higher saturated fatty acids, higher unsaturated fatty acids or mixtures thereof are preferably used. As the higher fat saturated fatty acids, for example, capric acid, uradecyl acid, lauric acid, tridecyl acid,
Myristic acid, pentadecyl acid, palmitic acid, heptadecyl acid, stearic acid, nonadecanoic acid, arachidic acid,
Examples thereof include behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melissic acid, laxeric acid, and the like, or a mixture thereof.

The higher unsaturated fatty acids have 6 carbon atoms.
Unsaturated fatty acids of ~ 22 are preferably used, and among them, more preferable ones include, for example, undecylenic acid, oleic acid, elaidic acid, celetric acid, erucic acid, brassic acid, sorbic acid, linoleic acid, linolenic acid, arachidonic acid, Stearolic acid, 2-hexadecenoic acid, 7-
Hexadecenoic acid, 9-hexadecenoic acid, gadoleic acid,
Gadoelaidic acid, 11-eicosenoic acid, etc., or a mixture thereof can be mentioned.

As the higher fatty acid metal salt, higher saturated fatty acid metal salt, higher unsaturated fatty acid metal salt or a mixture thereof is preferably used. The higher fat-saturated fatty acids are represented by the following general formula. _{CH 3 (CH 2) n COO} (M) where a n = 8 to 30, the metal element (M) is, 1A of the Periodic Table of the Elements, 2A, 3A group elements, zinc, and aluminum are preferably used . Among them, more preferred are, for example, capric acid, uradecyl acid, lauric acid, tridecyl acid, myristic acid, pentadecyl acid,
Palmitic acid, heptadecyl acid, stearic acid, nonadecanoic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melissic acid, laccelic acid lithium salt, sodium salt, magnesium salt, calcium salt, zinc salt , Aluminum salts, etc., or a mixture thereof.

As the higher unsaturated fatty acid metal salts, metal salts of unsaturated fatty acids having 6 to 22 carbon atoms with 1A, 2A and 3A group elements of the Periodic Table of Elements excluding Na and Ca, zinc, aluminum and the like. Are preferably used, and among them, as more preferable ones, undecylenic acid, oleic acid, elaidic acid, cetoleic acid, erucic acid, brassic acid,
Sorbic acid, linoleic acid, linolenic acid, arachidonic acid,
Stearolic acid, 2-hexadecenoic acid, 7-hexadecenoic acid, 9-hexadecenoic acid, gadoleic acid, gadoelaidic acid, 11-eicosenoic acid lithium salt, magnesium salt, calcium salt, zinc salt, aluminum salt, etc., or a mixture thereof. Can be mentioned.

Examples of the higher fatty acid amide include oleic acid amide, erucic acid amide, stearic acid amide, behenic acid amide, behenic acid-stearylamine monoamide, ethylenebisstearic acid amide, ethylenebisoleic acid amide, ethylenebisamide. Examples thereof include erucic acid amide, p-phenylenebisstearic acid amide, and a polycondensation product of ethylenediamine, stearic acid, and sebacic acid. The higher fatty acid ester, the higher fatty acid, the higher fatty acid metal salt, and the higher fatty acid amide may be used alone or in combination.

Among the above components (B), the melting point is 150 ° C.
A montanic acid ester wax, a partially saponified montanic acid ester wax, hardened castor oil, and the like, which are solid at 23 ° C., are preferably used from the viewpoint of moldability.
Specific compounds include Clariant's product (Lic
owaxE, LicowaxF, LicowaxKP,
Licowax KP303, Licowax KSL, L
icowaxKST, LicowaxWE4, Lico
waxWE40, LicowaxOP, Licowax
OM, LicowaxO), (EwaxB of BASF)
ASF) and the like correspond to this. Among them, a product (Licowax OP) of Clariant Co., which is a partially saponified montanic acid ester wax, is more preferable from the viewpoints of releasing property and blocking property during drying.

The component (B) is added in an amount of 0. 0 from the viewpoint of generation of silver marks on the surface of the molded product or releasability with respect to 100 parts by weight of the (A) polytrimethylene terephthalate resin.
005 parts by weight or more, 0.5 from the viewpoint of mechanical properties of the molded product
It is less than or equal to parts by weight, preferably 0.01 to 0.2 parts by weight. Further, the polytrimethylene terephthalate resin composition of the present invention, to the extent that the object of the present invention is not impaired,
Polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polystyrene resin (rubber reinforced polystyrene, acrylonitrile-
One or more thermoplastic resins such as butadiene-styrene resin) may be mixed.

Further, the composition of the present invention may be used in combination with various additives which are usually used within the range not impairing the object of the present invention. The types of additives include antioxidants,
Crystal nucleating agents, plasticizers, coloring agents and the like can be mentioned. The method for producing the polytrimethylene terephthalate resin composition of the present invention is not particularly limited, but a (A) polytrimethylene terephthalate, (B) ester wax, the above-mentioned additives and the like are used in a single-screw or multi-screw extruder or a kneader. A method of melt kneading at a temperature of 200 to 400 ° C. using a known melt kneader such as a mixing roll or a Banbury mixer can be mentioned. In particular, melt kneading using an extruder is simple and desirable. The polytrimethylene terephthalate resin composition of the present invention is compared with a conventional resin molded body,
Since the moldability, the appearance of the molded product and the mechanical properties are extremely good and the hinge properties are excellent, it is possible to use known methods such as injection molding, extrusion molding, blow molding, for example, automobile part materials, electric / electronic materials, industrial materials, industrial materials. It can be suitably used as a molding material for household products.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The properties described in Examples and Comparative Examples were evaluated by the following methods. 1. [Η] (molded product) [η] (molded product) was obtained by the following definition formula. [Η] = lim (1 / C) × (ηr−1) [C → 0] ηr in the definition formula is o-chloro having a purity of 98% or more for the molded product used for the hinge test shown in (B) below. Relative viscosity is defined as a value obtained by dividing the viscosity of a diluted solution of polytrimethylene terephthalate resin dissolved in phenol at 35 ° C. by the viscosity of the solvent itself measured at the same temperature. C is the weight value of the PTT resin in gram units in 100 ml of the above solution. (A) Releasability (molding condition) The sample was molded using an injection molding machine. The equipment is IS90B manufactured by Toshiba Machine Co., Ltd., the mold is a cup-shaped molded product (the mold shown in FIG. 1), the mold temperature is set to 95 ° C., and the injection time is 20.
Seconds, and a cooling time of 15 seconds, a molding piece was obtained under the injection molding conditions.
The cylinder temperature was 250 ° C.

2. Mold release force Molding was performed under the above molding conditions using a mold equipped with the mold release force measuring device shown in FIG. 1, and the mold release force from the 31st shot to the 35th shot was measured to obtain an average value. (B) Hinge property, tensile property (molding condition) The sample was molded using an injection molding machine. The equipment is PS40E manufactured by NISSEI RESIN CO., LTD., The mold temperature is set to 95 ° C, and injection 2
A molded product was obtained under the injection molding conditions of 0 seconds and 15 seconds of cooling. The cylinder temperature was 250 ° C.

3. Hinge characteristics The molded article for a hinge characteristic test obtained under the above-mentioned molding conditions was subjected to a repeated bending test at a bending angle of 180 degrees, the number of times until breaking was determined, and the hinge characteristic was evaluated. FIG. 2 is a plan view of a molded product for hinge characteristic test,
It has a bent portion with a width of 5 mm, a length of 22 mm and a thickness of 0.4 mm. This part is repeatedly bent in the directions of arrows a and b.

4. Tensile Strength (GPa), Tensile Elongation (%) It was measured according to ASTM D638. 5. Appearance of molded product Using Handy Gloss Meter IG320 manufactured by HORIBA, JIS-
Gs60 ° C. was measured according to K7150. Number 70
In the above cases, it was evaluated as ◯, and when it was less than 70, it was evaluated as x.

Materials used in Examples and Comparative Examples are described below. (A1) PTT: polytrimethylene terephthalate resin. Intrinsic viscosity [η] = 0.90 to 1.30 polytrimethylene terephthalate The intrinsic viscosity [η] was determined based on the following definition formula. [Η] = lim (1 / C) × (ηr−1) [C → 0] ηr in the definition formula is the viscosity at 35 ° C. of a dilute solution of PTT resin dissolved in o-chlorophenol having a purity of 98% or more. Is divided by the viscosity of the solvent itself measured at the same temperature to define the relative viscosity. Further, C is a solute weight value in gram unit in 100 ml of the above solution. (A2) PBT: Polybutylene terephthalate resin manufactured by Polyplastics Co., Ltd. Duranex 2002 (A3) PET: Polyethylene terephthalate resin [η] = 0.68 polyethylene terephthalate The intrinsic viscosity [η] is defined as above. It was obtained based on.

[0035] (B1) montanic acid partially saponified ester wax Clariant Licowax OP (B2) montanic acid ester wax Clariant Licowax E (B3) montanic acid wax Clariant Licowax S (B4) oleic acid NAF-34 manufactured by Nippon Oil & Fats Co., Ltd. (B5) Ca stearate Made by Nippon Oil & Fat Co., Ltd. (B6) Erucamide Alfro P-10 manufactured by Nippon Oil & Fats Co., Ltd. (C) Polyethylene glycol (adhesive) NOF Corporation PEG400

[0036]

Examples 1-5, Comparative Examples 1-5 (A1) PTT;
[Η] = 0.90, (A1) PTT; [η] = 1.0
0, (A1) PTT; [η] = 1 · 10, (A1) PT
T; [η] = 1.30, (A2) PBT, (A3) PE
T, (B1) LicowaxOP, (C) PEG400
Various properties of the (adhesive) were examined by the above-mentioned measurement methods after premixing with a blender at the blending ratio shown in Table 1. The results are shown in Table 1. In addition, (A1), (A
Regarding 2) and (A3), they were pre-dried before molding to have a moisture content of 0.01% by weight or less. (A3) PET:
In Comparative Example 2 in which the polyethylene terephthalate resin was used, there was a problem in moldability such as mold release failure at the injection molding stage, and it was not possible to evaluate the physical properties.

[0037]

Examples 6 to 10 (A1) PTT; [η] = 1.1,
(B2) Licowax E, (B3) Licowax
S, (B4) NAA-34, (B5) stearic acid C
a, (B6) Alflo P-10, (C) PEG400
Various properties of the (adhesive) were examined by the above-mentioned measuring methods after premixing with a blender in a blending ratio shown in Table 2. The results are shown in Table 2. As for (A1), it was pre-dried before molding to obtain a moisture content of 0.01% by weight.
Below.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

INDUSTRIAL APPLICABILITY The polytrimethylene terephthalate resin composition of the present invention is a molding material excellent in moldability, appearance of molded products and mechanical properties, and excellent in toughness and hinge properties. It can be used for parts, automobile parts, and other useful industrial parts that require high practical physical properties. A resin composition having such excellent properties has not been obtained so far in polyethylene terephthalate and polybutylene terephthalate.

[Brief description of drawings]

FIG. 1 is a schematic view of a mold used for measuring releasability in an example of the present invention.

FIG. 2 is a plan view of a molded product for a hinge characteristic test.

[Explanation of symbols]

1 sprue runner 2 cup shaped products 3 ejector pins 4 ejector plate 5 Pressure sensor 6 ejector rod 7 Release force recorder

Continued front page    F-term (reference) 4F071 AA45 AA88 AC09 AC10 AC12                       AE11 AF13 AH07 AH12 BA01                       BB05 BC07                 4J002 CF051 EF056 EG026 EG036                       EG046 EH036 EH046 EH056                       EP016 FD166 GN00 GQ00

Claims (8)

[Claims] 1. The amount of (A) 100 parts by weight of polytrimethylene terephthalate resin and (B) higher fatty acid ester and / or higher fatty acid and / or higher fatty acid metal salt and / or higher fatty acid amide added in an amount of 0.005 to 0.
A polytrimethylene terephthalate resin composition comprising 5 parts by weight, wherein the polytrimethylene terephthalate resin composition has an intrinsic viscosity [η] of 0.95 or more. 2. The polytrimethylene terephthalate resin composition according to claim 1, wherein the intrinsic viscosity [η] of the polytrimethylene terephthalate resin composition is 1.00 or more. 3. The polytrimethylene terephthalate resin composition according to claim 1 or 2, wherein (B) is a higher fatty acid ester. 4. The polytrimethylene terephthalate resin composition according to claim 3, wherein the higher fatty acid ester (B) is a montanic acid ester wax and / or a montanic acid partially saponified ester wax. 5. A molded product obtained by molding the polytrimethylene terephthalate resin composition according to any one of claims 1 to 4. 6. The molded product according to claim 5, wherein the molded product has an intrinsic viscosity [η] of 0.95 or more. 7. The molded product according to claim 6, wherein the molded product has an intrinsic viscosity [η] of 1.00 or more. 8. The molded product according to claim 5, wherein the molded product has a hinge portion.