JP2003201394A - Ptt resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoplastic polyester resin composition which has good mechanical properties and an appearance of moldings, a short molding cycle, and excellent moldability, and the moldings. <P>SOLUTION: A polytrimethylene terephthalate resin composition comprises (A) 100 pts.wt. polytrimethylene terephthalate resin, (B) 0.005-1 pt.wt. nucleating agent, and (C) 0.005-0.5 pt.wt. higher fatty acid ester and/or higher fatty acid and/or higher fatty acid amide. <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 which is preferably used for automobile parts and other useful industrial parts.
TECHNICAL FIELD The present invention relates to a polytrimethylene terephthalate resin composition having excellent mechanical properties and appearance of a molded product, a short molding cycle, and excellent moldability.

[0002]

2. Description of the Related Art Since polytrimethylene terephthalate is excellent in mechanical properties, chemical resistance, electrical properties and the like, it is expected to be used in a wide range of fields such as automobile parts and electric / electronic parts. However, since polytrimethylene terephthalate has a slow crystallization rate in the temperature range of 100 ° C. or lower, crystallization does not proceed sufficiently in the mold temperature range,
There is a problem that molding is impossible or the molding cycle becomes long. In particular, in molding at a mold temperature of 70 ° C. or lower, the molded product does not release from the mold and cannot be molded. In order to shorten the molding cycle, it is possible to mold by setting the mold temperature to a high temperature of 100 ° C. or higher, but this is not practical because the molding cost becomes high.

It has long been known that a thermoplastic polyester represented by polyethylene terephthalate uses a carboxylic acid alkali metal salt or a carboxylic acid alkaline earth metal salt as a crystal nucleating agent for the purpose of increasing the crystallization rate. Has been. According to US Pat. No. 3,761,450, by adding a small amount of a carboxylic acid Li salt and / or a carboxylic acid Na salt to a saturated polyester as a crystal nucleating agent, the crystallization speed is increased and the molding cycle is shortened. is there. However, regarding polyesters and carboxylic acid metal salts, only general provisions are made, and (A) polytrimethylene terephthalate, (B) crystal nucleating agent, and (C) higher fatty acid ester and / or higher fatty acid and / or higher fatty acid. There is no description of amide combinations.

According to WO 00/17265,
It is described that by blending polytrimethylene terephthalate with a mono sodium salt of a dicarboxylic acid, the crystallization rate of the polymer is increased and the molding cycle at the time of molding can be shortened. However, dicarboxylic acid mono N
When the salt a is used as a crystal nucleating agent, there is a problem that the molecular weight is lowered and mechanical properties and hot melt retention are inferior.

[0005]

PROBLEM TO BE SOLVED BY THE INVENTION A PTT resin composition having excellent mechanical properties and appearance of a molded product, a short molding cycle, and excellent toughness and hinge properties, and a molded product thereof satisfying the market demand. This is the subject of the present invention.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems, and as a result, (A) polytrimethylene terephthalate resin, (B) crystal nucleating agent, and (C)
Higher fatty acid ester and / or higher fatty acid and /
It has also been found that a polytrimethylene terephthalate resin composition comprising a higher fatty acid amide exhibits the desired improvement effect. In particular, polytrimethylene terephthalate obtained by blending component (A) having a molecular weight in a specific range with fatty acid metal salt represented by the general formula (1) as component (B) and higher fatty acid ester as component (C). It has been found that the intended improvement effect is more remarkably exhibited by the resin composition, and the present invention has been completed.

That is, the present invention is as follows: (A) Polytrimethylene terephthalate resin 100
Parts by weight, (B) crystal nucleating agent 0.005-1 parts by weight, (C)
Higher fatty acid ester and / or higher fatty acid and /
Alternatively, a polytrimethylene terephthalate resin composition comprising 0.005 to 0.5 part by weight of a higher fatty acid amide. 2. (A) The polytrimethylene terephthalate resin composition according to the above 1, wherein the intrinsic viscosity [η] of the polytrimethylene terephthalate resin is 0.95 or more.

3. (B) The crystal nucleating agent is talc, boron nitride,
3. The polytrix according to 1 or 2 above, which comprises mica, kaolin, silica, clay, inorganic carboxylate, inorganic sulfonate, carbonate, metal oxide, organic carboxylate, organic sulfonate. Methylene terephthalate resin composition. 4. (B) The polytrimethylene terephthalate resin composition according to the above 3, wherein the crystal nucleating agent is a fatty acid metal salt represented by the following general formula (1).

[0009]

[Chemical 2]

5. (B) component is higher fatty acid Na and /
Alternatively, the poly (trimethylene terephthalate) resin composition as described in 4 above, which is a higher fatty acid Ca and / or a higher fatty acid Li. 6. The component (B) is Na montanate and / or Ca montanate and / or Li montanate, and the polytrimethylene terephthalate resin composition according to the above 5, wherein 7. (C) is a higher fatty acid ester, The polytrimethylene terephthalate resin composition in any one of said 1-6 characterized by the above-mentioned. 8. (B) The poly (trimethylene terephthalate) resin composition as described in 7 above, wherein the higher fatty acid ester is a montanic acid ester wax and / or a partially saponified montanic acid ester wax. Is.

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

In addition to the above, aromatic dicarboxylic acids other than terephthalic acid, such as phthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid and 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 intrinsic viscosity [η] of the PTT resin composition of the present invention and its molded article is preferably 0.70 or more from the viewpoint of mechanical properties, and [η] is 1.00 or more. It is more preferable that [η] is 1.10 or more. For the intrinsic viscosity [η], a Ostwald viscometer was used, and the ratio ηsp of the specific viscosity ηsp and the concentration C (g / 100 ml) in o-chlorophenol at 35 ° C.
It is possible to extrapolate / C to zero concentration and obtain it 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.

The crystal nucleating agent (B) used in the present invention is not particularly limited as long as it is a compound that promotes crystallization of polytrimethylene terephthalate resin, but talc, mica, boron nitride, kaolin, silica, clay, metal. Oxides, inorganic carboxylic sun salts, inorganic sulfonates, organic carboxylates, organic sulfonates, carbonates and the like are preferably used. Among them, the fatty acid metal salt represented by the following general formula (1) has an effect of remarkably increasing the crystallization rate and is more preferably used.

[0018]

[Chemical 3]

Among the fatty acid metal salts, higher fatty acid Na
Salts, higher fatty acid Ca salts, and higher fatty acid Li salts are more preferable in the sense that the decrease in molecular weight due to heat retention of the polymer is suppressed. The crystal nucleating agents may be used alone or as a mixture thereof. The amount of component (B) added is
It is preferably 0.00 from the viewpoint of the crystallization rate with respect to 100 parts by weight of the (A) polytrimethylene terephthalate resin.
The amount is 5 parts by weight or more, and 1 part by weight or less, and more preferably 0.01 to 0.2 parts by weight, from the viewpoint of silver surface generation on the molded product or mechanical properties of the molded product. Next, the (C) higher fatty acid ester and / or higher fatty acid 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 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, eicosyl laurate, eicosyl palmitate, eicosyl stearate, eicosyl behenate, eicosyl lignocerate, eicosyl mericate, behenyl laurate, behenyl myristate, behenyl palmitate, behenyl stearate. Rate, behenyl behenate, behenyl arachinate, behenyl mericate, tetracosanyl laurate, tetracosa palmitate, tetracosanyl stearate, tetracosanyl behenate, tetracosanyl lignocerate, tetracosanyl cello Examples include tate, cerotinyl stearate, cerotinyl behenate, cerotinyl cerotinate, melicyl laurate, melicyl stearate, melicyl behenate, melicyl merisate, and the like, or mixtures thereof.

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. Esters of these polyhydric alcohols and higher fatty acids may be monoesters, diesters or triesters.

More preferred are, for example, glycerin monolaurate, glycerin monomyristate, glycerin monostearate, glycerin monobehenate,
Higher fatty acid monoglyceride such as glycerin monolignocellate, glycerin monomerisate, pentaerythritol-mono or di-laurate, pentaerythritol-mono or di-laurate, pentaerythritol-mono or di-myristate, pentaerythritol-mono or di Mono- or higher fatty acid esters of pentaerythritol such as palmitate, pentaerythritol-mono or di-stearate, pentaerythritol-mono or di-behenate, pentaerythritol-mono or di-lignocerate, pentaerythritol-mono or di-melisate Is.

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.

Examples of the higher fatty acid amides include oleic acid amide, erucic acid amide, stearic acid amide, behenic acid amide, behenic acid and 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.

Of the above-mentioned component (C), higher fatty acid esters are preferable from the viewpoint of improving releasability, and among them, the melting point is 15
A montanic acid ester wax that is solid at 23 ° C., which is about 0 ° C. or lower, a partially saponified montanic acid ester wax,
Hardened castor oil and the like are more preferably used in terms of moldability and handling. Specific compounds include Clariant products (Licowax E, Licowax F, Li
cowaxKP, LicowaxKP303, Lico
waxKSL, LicowaxKST, Licowax
WE4, LicowaxWE40, LicowaxO
P, LicowaxOM, LicowaxO), BAS
Company E's (EwaxBASF) corresponds 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 (C) is added in an amount of 0.005 parts by weight or more based on 100 parts by weight of the (A) polytrimethylene terephthalate resin in terms of releasability. From the viewpoint of mechanical properties of the product, it is 0.5 parts by weight or less, preferably 0.01 to 0.2 parts by weight. In the present invention, in addition to the above components, other additional components, if necessary, within a range that does not impair the characteristics and effects of the present invention, for example, an antioxidant, a flame retardant, a plasticizer, a flame retardant aid,
A weather (light) resistance improver, a slip agent, various colorants and the like may be added. Further, in the composition of the present invention, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polystyrene resin (rubber reinforced polystyrene, acrylonitrile-butadiene-styrene resin, etc.) is added to the composition of the present invention within a range not impairing the object of the present invention. 1) or 2 or more types of the thermoplastic resin of 1) may be mixed.

The method for producing the polytrimethylene terephthalate resin composition of the present invention is not particularly limited, but (A) polytrimethylene terephthalate resin, (B) crystal nucleating agent,
(C) Higher fatty acid ester and / or higher fatty acid and / or higher fatty acid amide, and the above-mentioned additives and the like using a known melt-kneader such as a single-screw or multi-screw extruder, a kneader, a mixing roll, a Banbury mixer, etc. A method of melt-kneading at a temperature of 200 to 400 ° C. can be mentioned. In particular, melt kneading using an extruder is simple and desirable. The poly (trimethylene terephthalate) resin composition of the present invention has excellent mechanical properties and appearance of a molded product, has a short molding cycle, and is excellent in moldability as compared with a conventional resin molded product. By a known method such as molding, it can be suitably used as a molding material for automobile part materials, electric / electronic materials, industrial materials, industrial materials, household products and the like.

[0032]

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. (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. (1) 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. It was

(B) Tensile Properties (Molding Conditions) Samples were 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. (2) Tensile strength (MPa) and tensile elongation (%) The tensile strength (MPa) was measured according to ISO-527. (3) Bending strength (MPa), bending elastic modulus (GPa) It was performed according to ISO-178. (4) 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. (5) Under the sink condition (B) molding condition, the injection time was changed while keeping the cooling time at 15 seconds, and the injection time at the time when the crater-like sink marks disappeared on the dumbbell piece was determined.

Materials used in Examples and Comparative Examples are described below. (A1) PTT: polytrimethylene terephthalate resin. Intrinsic viscosity [η] = 0.80 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 defining formula is 35 ° C. of a dilute solution of polytrimethylene terephthalate dissolved in o-chlorophenol having a purity of 98% or more. Relative viscosity is defined as the value obtained by dividing the viscosity of the above-mentioned by the viscosity of the solvent itself measured at the same temperature. 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.

(B1) Na montanate Licomont NaV 101 made by Clariant (B2) Talc Nippon Talc Co., Ltd. Microace L-1 (B3) boron nitride HGP manufactured by Denki Kagaku Co., Ltd. (C1) Montanic acid partially saponified ester wax Clariant Licowax OP (C2) montanic acid ester wax Clariant Licowax E (C3) montanic acid wax Clariant Licowax S (C4) Oleic acid NAF-34 manufactured by Nippon Oil & Fats Co., Ltd. (C5) Ca stearate Made by Nippon Oil & Fat Co., Ltd. (C6) Erucamide Alfro P-10 manufactured by Nippon Oil & Fats Co., Ltd. (D) Polyethylene glycol (adhesive) NOF Corporation PEG400

[0036]

Examples 1 to 8 and Comparative Examples 1 to 7 (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) LicommontNaV 101, (B
2) LicommontCaV 102, (B3) Lic
oMontLiV 102, (B4) terephthalic acid mono-Na salt, (C1) LicommontOP, (D) PEG
400 (adhesive) was mixed at a blending ratio shown in Table 1 using a blender, and various properties were examined by the above-described measurement methods. 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. In Comparative Example 6 in which PET: 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 9 to 13 (A1) PTT; [η] = 1.1
0, (B1) LicommontNaV 101, (C
2) LicowaxE, (C3) LicowaxS,
(C4) NAA-34, (C5) Ca stearate,
(C6) Alflo P-10 and (D) PEG400 (adhesive) were premixed in a blending ratio shown in Table 2 by using a blender, and various properties were examined by the above-described measurement methods. The results are shown in Table 2. As for (A1), it was pre-dried before molding so that the water content was 0.01% by weight or less.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

EFFECT OF THE INVENTION The PTT resin composition of the present invention has extremely good mechanical properties and appearance of a molded article, and has a short molding cycle.
It is a molding material with excellent moldability, and the molded product can be used for applications requiring high practical physical properties in electric / electronic parts, automobile parts, and other useful industrial parts. 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 drawing of a mold used for measuring releasability in an example of the present invention.

[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

Claims (8)

[Claims] 1. A polytrimethylene terephthalate resin (A) of 100 parts by weight, (B) a crystal nucleating agent of 0.005 to 1 part by weight, and (C) a higher fatty acid ester and / or a higher fatty acid and / or a higher fatty acid amide. 005
A polytrimethylene terephthalate resin composition comprising 0.5 parts by weight. 2. The polytrimethylene terephthalate resin composition according to claim 1, wherein the (A) polytrimethylene terephthalate resin has an intrinsic viscosity [η] of 0.95 or more. 3. The (B) crystal nucleating agent is talc, boron nitride, mica, kaolin, silica, clay, an inorganic carboxylate,
The polytrimethylene terephthalate resin composition according to claim 1 or 2, comprising an inorganic sulfonate, a carbonate, a metal oxide, an organic carboxylate, and an organic sulfonate. 4. The polytrimethylene terephthalate resin composition according to claim 3, wherein the crystal nucleating agent (B) is a fatty acid metal salt represented by the following general formula (1). [Chemical 1] 5. The polytrimethylene terephthalate resin composition according to claim 4, wherein the component (B) is higher fatty acid Na and / or higher fatty acid Ca and / or higher fatty acid Li. 6. The polytrimethylene terephthalate resin composition according to claim 5, wherein the component (B) is Na montanate and / or Ca montanate and / or Li montanate. 7. The polytrimethylene terephthalate resin composition according to claim 1, wherein (C) is a higher fatty acid ester. 8. The polytrimethylene terephthalate resin composition according to claim 7, wherein the higher fatty acid ester (B) is a montanic acid ester wax and / or a partially saponified montanic acid ester wax.