JP2011057932A - Transportation equipment element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide transportation equipment elements having excellent heat resistance and excellent in various properties such as low water absorptivity, toughness, chemical resistance, boiling water resistance and weight reduction. <P>SOLUTION: There are provided transportation equipment elements comprising a polyamide resin composition containing a polyamide (A) comprising a diamine unit containing ≥70 mol% paraxylylenediamine unit and a dicarboxylic acid unit containing ≥70 mol% 6-18C linear aliphatic dicarboxylic acid unit, and a fibrous filler (B), wherein, the polyamide resin composition contains 5-200 pts.mass fibrous filler (B) per 100 pts.mass polyamide (A). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a polyamide resin composition having excellent heat resistance. More specifically, the present invention relates to a transportation equipment component made of a thermoplastic polyamide resin having excellent heat resistance, mechanical strength, toughness, impact resistance, low water absorption, and chemical resistance.

Aliphatic polyamides such as nylon 6 and nylon 66 have excellent properties such as heat resistance, chemical resistance, rigidity, wear resistance, moldability, and light weight. Used for automotive parts. On the other hand, conventional aliphatic polyamides have a large water absorption rate and have disadvantages in performance such as dimensional stability, water resistance, and boiling water resistance. Furthermore, as the performance of automobile engines in recent years has increased, the temperature in the engine room has increased, and the heat resistance of conventional resins has become insufficient.

In response to such demands in the world, 6T semi-aromatic polyamides based on 1,6-hexanediamine and terephthalic acid have been proposed and disclosed as being applicable as automotive parts (Patent Documents 1 to 4). reference). However, since the polyamide composed of 1,6-hexanediamine and terephthalic acid has a melting point of around 370 ° C., it is necessary to carry out melt polymerization and melt molding at the decomposition temperature or higher, and it cannot be practically used. Therefore, in practice, it has been put to practical use with a composition having a low melting point of about 280 ° C. to 320 ° C., which is an actually usable temperature range, by copolymerizing 30 to 40 mol% of adipic acid, isophthalic acid, ε-caprolactam, etc. ing. The copolymerization of the third component and the fourth component in this manner is effective for lowering the melting point, but on the other hand causes a decrease in crystallization speed and ultimate crystallinity. As a result, not only the physical properties such as rigidity, chemical resistance and dimensional stability at high temperatures are lowered, but also there is a concern that productivity is lowered due to extension of the molding cycle. In addition, the moldability is also difficult because the viscosity is likely to decrease during melt residence.

Applying 9T semi-aromatic polyamide consisting of a mixture of 1,9-nonanediamine and 2-methyl-1,8-octanediamine and terephthalic acid as a high melting point polyamide other than 6T semi-aromatic polyamide for automotive parts Has been proposed (see Patent Document 5). 9T semi-aromatic polyamide has higher crystallization speed, ultimate crystallinity and low water absorption than the above 6T semi-aromatic polyamide. As a result of having aromatic dicarboxylic acid as a main component, the problem that the viscosity is liable to decrease during melt residence and the moldability is difficult has not been solved.

Japanese Patent Laid-Open No. 3-7761 JP-A-3-72564 JP-A-4-239530 JP-A-4-239531 JP 7-228769 A

The object of the present invention is to provide a polyamide resin composition that is a transportation equipment part that solves the above-mentioned problems and has excellent heat resistance and excellent physical properties such as low water absorption, toughness, chemical resistance, boiling water resistance, and light weight. It is to provide.

As a result of intensive studies, the present inventors have found that a polyamide comprising a diamine component mainly composed of paraxylylenediamine and a dicarboxylic acid component mainly composed of a linear aliphatic dicarboxylic acid having 6 to 18 carbon atoms and a specific one It has been found that a polyamide resin composition containing glass fibers can provide a transportation device part having excellent performances of heat resistance, low water absorption, toughness, chemical resistance, boiling water resistance, and light weight.

That is, the present invention provides a polyamide (A) and a fibrous filler (B) comprising a diamine component containing 70 mol% or more of paraxylylenediamine and a dicarboxylic acid component containing 70 mol% or more of a linear dicarboxylic acid having 6 to 18 carbon atoms. It is related with the polyamide resin composition containing 10-200 mass parts of fibrous fillers (B) with respect to 100 mass parts of polyamides (A). The present invention also relates to a transportation equipment part comprising the polyamide resin composition.

The polyamide resin composition of the present invention is excellent in heat resistance and excellent in various physical properties such as low water absorption, toughness, chemical resistance, boiling water resistance and light weight, and can be suitably used for transportation equipment parts.

The transportation equipment part of the present invention comprises a polyamide resin composition containing a polyamide (A) comprising a diamine unit and a dicarboxylic acid unit, which will be described later, and a fibrous filler (B). Here, the diamine unit refers to a structural unit derived from the raw material diamine component, and the dicarboxylic acid unit refers to a structural unit derived from the raw material dicarboxylic acid component.

The polyamide (A) is a polyamide comprising a diamine unit containing 70 mol% or more of paraxylylenediamine units and a dicarboxylic acid unit containing 70 mol% or more of a linear aliphatic dicarboxylic acid unit having 6 to 18 carbon atoms. The paraxylylenediamine unit in the diamine unit is preferably 80 mol% or more, more preferably 90 mol% or more, and most preferably 100 mol%. 80 mol% or more is preferable, as for a C6-C18 linear aliphatic dicarboxylic acid unit in a dicarboxylic acid unit, 90 mol% or more is more preferable, and 100 mol% is the most preferable.

The polyamide (A) is obtained by polycondensing a diamine component containing 70 mol% or more of paraxylylenediamine and a dicarboxylic acid component containing 70 mol% or more of a linear aliphatic dicarboxylic acid having 6 to 18 carbon atoms.

The starting diamine component used for the polyamide (A) contains 70 mol% or more of paraxylylenediamine, more preferably 80 mol% or more, particularly preferably 90 mol% or more, and 100 mol%. Most preferred. Polyamide obtained by adjusting paraxylylenediamine in the diamine component to 70 mol% or more should be suitably used as a transportation equipment part as a polyamide having a high melting point and high crystallinity and excellent in heat resistance and chemical resistance. Can do. When paraxylylenediamine in the diamine component of the raw material is less than 70 mol%, various physical properties such as heat resistance and chemical resistance are lowered, which is not preferable.

As raw material components other than paraxylylenediamine, 1,4-butanediamine, 1,6-hexanediamine, 1,8-octanediamine, 1,10-decanediamine, 1,12-dodecanediamine, 3-methyl-1 , 5-pentanediamine, 2,2,4-trimethyl-1,6-hexanediamine, 2,4,4-trimethyl-1,6-hexanediamine, 2-methyl-1,8-octanediamine, 5-methyl Aliphatic diamines such as -1,9-nonanediamine, 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, cyclohexanediamine, methylcyclohexanediamine, isophoronediamine, etc. Examples include diamines, araliphatic diamines such as metaxylylenediamine, or mixtures thereof. That although the present invention is not limited to these.

The dicarboxylic acid component used for the raw material of the polyamide (A) contains 70 mol% or more of a linear aliphatic carboxylic acid having 6 to 18 carbon atoms, more preferably 80 mol% or more, and particularly preferably 90 mol% or more. Preferably, 100 mol% is most preferable. Polyamide obtained by adjusting the straight chain aliphatic carboxylic acid having 6 to 18 carbon atoms to 70 mol% or more exhibits fluidity, high crystallinity, and low water absorption during melt processing, heat resistance, chemical resistance, and dimensions. Polyamide excellent in stability and moldability can be suitably used as a transportation equipment part. When the concentration of the straight-chain aliphatic dicarboxylic acid having 6 to 18 carbon atoms in the raw material dicarboxylic acid component is less than 70 mol%, the heat resistance, chemical resistance and molding processability are lowered, which is not preferable.

Examples of the linear aliphatic dicarboxylic acid having 6 to 18 carbon atoms include adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, Examples include hexadecanedioic acid. Among them, azelaic acid, sebacic acid, undecanedioic acid, and dodecanedioic acid are preferable, and sebacic acid and azelaic acid are particularly preferable. If an aliphatic dicarboxylic acid having 5 or less carbon atoms is used in place of these, the melting point and boiling point of the dicarboxylic acid are low, so that the reaction molar ratio of the diamine and the dicarboxylic acid collapses during the polycondensation reaction. This is not preferred because the mechanical properties and thermal stability of the resulting polyamide are lowered. When an aliphatic dicarboxylic acid having 19 or more carbon atoms is used, a polyamide having stable properties can be obtained, but this is not preferable because the melting point is greatly lowered and heat resistance cannot be obtained.

As raw material dicarboxylic acids other than straight chain aliphatic dicarboxylic acids having 6 to 18 carbon atoms, malonic acid, succinic acid, 2-methyladipic acid, trimethyladipic acid, 2,2-dimethylglutaric acid, 2,4-dimethylglutaric acid 3,3-dimethylglutaric acid, 3,3-diethylsuccinic acid, 1,3-cyclopentanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, isophthalic acid, terephthalic acid, 2, Examples thereof include, but are not limited to, 6-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, and mixtures thereof.

In addition to the diamine component and dicarboxylic acid component, lactams such as ε-caprolactam and laurolactam, and aliphatic aminocarboxylic acids such as aminocaproic acid and aminoundecanoic acid are also used as copolymerization components as long as the effects of the present invention are not impaired. it can.

A small amount of a monofunctional compound having reactivity with the terminal amino group or carboxyl group of the polyamide may be added as a molecular weight modifier during the polycondensation of the polyamide (A). The compounds that can be used include aliphatic monocarboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, lauric acid, tridecylic acid, myristic acid, palmitic acid, stearic acid, pivalic acid, benzoic acid, and toluyl Acids, aromatic monocarboxylic acids such as naphthalenecarboxylic acid, aliphatic monoamines such as butylamine, amylamine, isoamylamine, hexylamine, heptylamine and octylamine, araliphatic monoamines such as benzylamine and methylbenzylamine, or these Although a mixture can be illustrated, it is not limited to these.

When a molecular weight modifier is used during the polycondensation of the polyamide (A), the preferred amount varies depending on the reactivity, boiling point, reaction conditions, etc. of the molecular weight modifier used. It is about 0.1-10 mass% with respect to the sum total of an acid component.

There are several indicators of the degree of polymerization of polyamide, but the relative viscosity is generally used. In the polyamide (A), the preferred relative viscosity is 1.8 to 4.2, more preferably 1.9 to 3.5, and particularly preferably 2.0 to 3.0. When the relative viscosity of the polyamide (A) is less than 1.8, the fluidity of the melted polyamide (A) tends to be unstable and the appearance of the molded product may be deteriorated. On the other hand, if the relative viscosity of the polyamide (A) exceeds 4.2, the melt viscosity of the polyamide (A) may be too high and the molding process may become unstable. The relative viscosity here refers to the drop time (t) measured by dissolving 1 g of polyamide in 100 mL of 96% sulfuric acid at 25 ° C. with a Canon Fenceke viscometer, and the drop of 96% sulfuric acid itself measured in the same manner. It is a ratio of time (t0) and is represented by the following formula (1).
Relative viscosity = t / t0 (1)

The polyamide (A) preferably has a number average molecular weight (Mn) in the range of 10,000 to 50,000 in the gel permeation chromatography (GPC) measurement, and is preferably in the range of 14,000 to 30,000. Particularly preferred. By setting Mn in the range of 10,000 to 50,000, the mechanical strength in the case of forming a molded article is stable, and the mold has a suitable melt viscosity that provides good workability in terms of moldability. Further, the dispersity (weight average molecular weight / number average molecular weight = Mw / Mn) is preferably in the range of 1.5 to 5.0, and particularly preferably in the range of 1.5 to 3.5. By setting the degree of dispersion in the above range, the fluidity at the time of melting and the stability of the melt viscosity are increased, and the workability of melt kneading and melt molding is improved. Also, the toughness is good, and various physical properties such as water absorption resistance, chemical resistance, and heat aging resistance are also good.

Polyamide (A) is (a) polycondensation in the molten state, (b) so-called solid phase polymerization in which a low molecular weight polyamide is obtained by polycondensation in the molten state and then heat-treated in the solid phase, (c) in the molten state After obtaining a low molecular weight polyamide by polycondensation, it can be obtained by a known polyamide synthesis method such as extrusion polymerization in which a high molecular weight is obtained in a molten state using a kneading extruder.

Although the polycondensation method in the molten state is not particularly limited, a method in which an aqueous solution of a nylon salt of a diamine component and a dicarboxylic acid component is heated under pressure and polycondensed in a molten state while removing water and condensed water, Examples thereof include a method in which a diamine component is directly added to a dicarboxylic acid in a molten state and polycondensed in an atmosphere of atmospheric pressure or steam. When polymerizing by directly adding diamine to the molten dicarboxylic acid, the diamine component is continuously added to the molten dicarboxylic acid phase in order to keep the reaction system in a uniform liquid state, so as not to fall below the melting point of the resulting oligoamide and polyamide. The polycondensation proceeds while controlling the reaction temperature.

The polyamide obtained by melt polycondensation is once taken out, pelletized, and dried before use. In order to further increase the degree of polymerization, solid phase polymerization may be performed. As a heating device used in drying or solid phase polymerization, a continuous heating drying device, a rotary drum type heating device called a tumble dryer, a conical dryer, a rotary dryer or the like, and a rotary blade inside a nauta mixer are used. Although a conical heating apparatus provided with can be used suitably, a well-known method and apparatus can be used without being limited to these. Particularly in the case of solid-phase polymerization of polyamide, a batch heating apparatus is preferably used because it can seal the inside of the system and easily proceed with polycondensation in a state where oxygen that causes coloring is removed. It is done.

In the polycondensation system of the polyamide (A), a phosphorus atom-containing compound may be added as a catalyst for the polycondensation reaction and an antioxidant for preventing the polyamide from being colored by oxygen present in the polycondensation total. Phosphorus atom-containing compounds to be added include alkaline earth metal salts of hypophosphorous acid, alkali metal salts of phosphoric acid, alkaline earth metal salts of phosphoric acid, alkali metal salts of pyrophosphoric acid, alkaline earth metal salts of pyrophosphoric acid And alkali metal salts of metaphosphoric acid and alkaline earth metal salts of metaphosphoric acid. Specifically, calcium hypophosphite, sodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, potassium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, magnesium phosphate, dimagnesium hydrogen phosphate , Magnesium dihydrogen phosphate, calcium phosphate, dicalcium hydrogen phosphate, calcium dihydrogen phosphate, lithium phosphate, dilithium hydrogen phosphate, lithium dihydrogen phosphate, sodium pyrophosphate, potassium pyrophosphate, magnesium pyrophosphate, pyro Examples thereof include, but are not limited to, calcium phosphate, lithium pyrophosphate, sodium metaphosphate, potassium metaphosphate, magnesium metaphosphate, calcium metaphosphate, lithium metaphosphate, or a mixture thereof.

The addition amount of the phosphorus atom-containing compound added to the polycondensation system of the polyamide (A) is preferably 50 to 400 ppm in terms of the phosphorus atom concentration in the polyamide (A), and more preferably 60 to 350 ppm. Is preferable, and it is especially preferable that it is 70-300 ppm. When the phosphorus atom concentration is less than 50 ppm, the effect as an antioxidant cannot be sufficiently obtained, and the polyamide resin composition tends to be colored, which is not preferable. In addition, when the phosphorus atom concentration exceeds 400 ppm, the gelation reaction of the polyamide resin composition is promoted, and foreign matter that may be attributed to the phosphorus atom-containing compound (A) may be mixed in the molded product. This is not preferable because the external appearance tends to deteriorate.

Moreover, it is preferable to add a polymerization rate adjusting agent in combination with the phosphorus atom-containing compound in the polycondensation system of polyamide (A). To prevent coloring of the polyamide during polycondensation, it is necessary to have a sufficient amount of phosphorus atom-containing compound, but there is a risk of causing gelation of the polyamide, so polymerization is also performed to adjust the amidation reaction rate. It is preferable to coexist with a speed regulator. Examples of the polymerization rate adjusting agent include alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal acetates and alkaline earth metal acetates, and alkali metal hydroxides and alkali metal acetates are preferable. Polymerization rate regulators include lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, lithium acetate, sodium acetate, acetic acid Examples include, but are not limited to, potassium, rubidium acetate, cesium acetate, magnesium acetate, calcium acetate, strontium acetate, barium acetate, or mixtures thereof.

When a polymerization rate modifier is added to the polycondensation system, the gram equivalent ratio of the phosphorus atom-containing compound and the polymerization rate modifier (= [gram equivalent of polymerization rate modifier] / [gram equivalent of phosphorus atom-containing compound]) is In the case of 0.4 to 1.0, more preferably 0.5 to 0.95, and particularly preferably 0.6 to 0.9. The effect of suppressing the amidation reaction promoting effect of the phosphorus atom-containing compound may be insufficient, and the gel in the polyamide may increase. On the other hand, if it exceeds 1.0, the effect of promoting the amidation reaction of the phosphorus atom-containing compound is excessively suppressed, the progress of polycondensation is delayed, the thermal history during polyamide production may increase, and the polyamide gel may increase. Therefore, it is not preferable.

The polyamide resin composition contains a fibrous filler (B) as a constituent component other than the polyamide (A). Examples of the fibrous filler (B) include glass fiber, carbon fiber, and metal fiber. The glass fiber is made of alkali-free borosilicate glass or alkali-containing C-glass, and uses a long fiber with a diameter of 3 to 30 μm and a length of 5 to 50 mm, or a short fiber with a length of 0.05 to 5 mm. Can do. Furthermore, the fibrous filler (B) may be subjected to a surface treatment with a silane coupling agent for improving adhesion to the resin, or a convergence or sizing agent treatment for improving handling properties.

Although the compounding quantity of a fiber filler (B) changes with kinds of fibrous filler to be used, it is 5-200 mass parts with respect to 100 mass parts of polyamides (A), Preferably it is 15-100 mass parts. If the blending amount of the glass fiber is less than 5 parts by weight, the effect of improving mechanical strength, thermal properties and the like is small, and if it is 200 parts by weight or more, the fluidity at the time of molding is inferior and the moldability is lowered.

In addition to the fibrous filler (B), an inorganic powder filler or the like can be blended.

It is preferable that a release agent is added to the polyamide resin composition in order to improve releasability at the time of molding. Specific examples include long-chain alcohol fatty acid esters, branched alcohol fatty acid esters, glycerides, polyhydric alcohol fatty acid esters, polymer composite esters, higher alcohols, ketone waxes, montan waxes, silicone oils, silicone gums, or mixtures thereof. However, it is not limited to these.

You may mix | blend the various additives generally used for the polymeric material in the said polyamide resin composition in the range which does not impair the effect of this invention. Specific examples include antioxidants, matting agents, heat stabilizers, weathering stabilizers, ultraviolet absorbers, nucleating agents, plasticizers, flame retardants, antistatic agents, anti-coloring agents, and anti-gelling agents. However, the present invention is not limited to these, and various materials can be blended.

You may mix | blend heat resistant resins, such as polyphenylene ether, polyphenylene sulfide, and polyetherimide, with the said polyamide resin composition in the range which does not impair the effect of this invention.

The method for producing the polyamide resin composition is not particularly limited, and can be produced by mixing and kneading a predetermined amount of polyamide (A), fibrous filler (B), and other additives and resin as required. . The melt kneading can be performed by a conventionally known method. For example, using a single-screw or twin-screw extruder, a Banbury mixer, or a similar device, all materials may be charged from the root of the extruder and melt kneaded. You may manufacture a pellet by the method of kneading | mixing with the fibrous reinforcing material side-feeded, fuse | melting. Alternatively, pellet blending may be performed after different types of compound materials are pelletized, or a method in which some powder components and liquid components are separately blended may be used.

The polyamide resin composition can be applied to a known molding method such as injection molding, blow molding, extrusion molding, compression molding, stretching, vacuum molding, and the like as an engine plastic, engine mount, engine cover, torque control lever, window regulator, headlamp. It can be molded into transportation equipment parts such as automotive parts such as lamp reflectors, door mirror stays, radiator tanks, and aircraft parts such as main wings.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In this example, various measurements were performed by the following methods.

(1) Relative viscosity of polyamide 1 g of polyamide was accurately weighed and dissolved in 100 ml of 96% sulfuric acid at 20-30 ° C. with stirring. After completely dissolving, 5 ml of the solution was quickly taken into a Cannon-Fenceke viscometer, and left for 10 minutes in a constant temperature bath at 25 ° C., and then the dropping speed (t) was measured. Further, the dropping rate (t0) of 96% sulfuric acid itself was measured in the same manner. The relative viscosity was calculated from t and t0 by the following formula (1).
Relative viscosity = t / t0 (1)

(2) Gel permeation chromatography (GPC)
GPC measurement was performed with Shodex GPC SYSTEM-11 manufactured by Showa Denko. Hexafluoroisopropanol (HFIP) was used as the solvent, and 10 mg of the sample polyamide was dissolved in 10 g of HFIP and used for the measurement. The measurement conditions were as follows: two HFIP-806M and two reference columns HFIP-800 of GPC standard columns (column size 300 × 8.0 mm ID) manufactured by the same company, column temperature 40 ° C., solvent flow rate 1. 0 mL / min. PMMA (polymethyl methacrylate) was used as the standard sample, and the data processing software used SIC-480II manufactured by the same company to determine the number average molecular weight (Mn) and the weight average molecular weight (Mw).

(3) Mechanical properties of molded products Mechanical properties of molded products were measured under the conditions shown in Table 1.

(4) An equilibrium water absorption rate φ50 × 3 mm thick disc-shaped test piece is weighed in an absolutely dry state, then immersed in atmospheric boiling water, and the change in mass over time is measured. The water absorption rate when the mass change disappeared was defined as the equilibrium water absorption rate.

<Synthesis Example 1>
Into a reaction vessel having an internal volume of 50 liters equipped with a stirrer, a condenser, a cooler, a thermometer, a nitrogen introducing tube, and a strand die, 8950 g (44.25 mol) of sebacic acid and calcium hypophosphite were precisely weighed. 54 g (0.073 mol) and 6.45 g (0.073 mol) of sodium acetate were weighed and charged (the gram equivalent ratio of calcium hypophosphite and sodium acetate was 0.5). After sufficiently purging the inside of the reaction vessel with nitrogen, the pressure was increased to 0.3 MPa with nitrogen, and the temperature was raised to 160 ° C. while stirring to uniformly melt sebacic acid. Next, 6026 g (44.25 mol) of paraxylylenediamine was added dropwise over 170 minutes with stirring. During this time, the internal temperature of the reaction vessel was continuously increased to 281 ° C. In the dropping step, the pressure was controlled to 0.5 MPa, and the generated water was removed from the system through a partial condenser and a cooler. The temperature of the partial condenser was controlled in the range of 145 to 147 ° C. After completion of the dropwise addition of paraxylylenediamine, the pressure was reduced at a rate of 0.4 MPa / h, and the pressure was reduced to normal pressure in 60 minutes. During this time, the internal temperature rose to 300 ° C. Thereafter, the pressure was reduced at a rate of 0.002 MPa / min, and the pressure was reduced to 0.08 MPa in 20 minutes. Thereafter, the reaction was continued at 0.08 MPa until the torque of the stirring device reached a predetermined value. Thereafter, the inside of the system was pressurized with nitrogen, and the polymer was taken out from the strand die and pelletized to obtain about 13 kg of polyamide 1 (hereinafter referred to as PA1). The relative viscosity of PA1 was 2.47, and Mw / Mn was 2.6.

<Synthesis Example 2>
A polyamide was synthesized under the same conditions as in Example 1 except that 8329 g (44.25 mol) of azelaic acid was used as the dicarboxylic acid component, to obtain polyamide 2 (hereinafter referred to as PA2). The relative viscosity of PA2 was 2.22, and Mw / Mn was 2.5.

<Synthesis Example 3>
A polyamide was synthesized under the same conditions as in Example 1 except that 5423 g (39.82 mol) of paraxylylenediamine and 603 g (4.43 mol) of metaxylylenediamine were used as the diamine component, and polyamide 3 (hereinafter referred to as PA3). Got. The relative viscosity of PA3 was 2.11 and Mw / Mn was 2.7.

The raw materials other than the polyamide used in this example are collectively shown as follows.
(1) Glass fiber manufactured by Nippon Electric Glass Co., Ltd., trade name 03T-296GH

<Example 1>
PA1 dried for 7 hours at 150 ° C under reduced pressure is supplied to the base hopper of a twin-screw extruder (trade name: TEM37BS) manufactured by Toshiba Machine Co., Ltd. at a speed of 8 kg / h, cylinder temperature: 280-300 ° C, screw rotation speed Extrusion was performed at 150 rpm, and glass fibers were side fed at a rate of 2 kg / h to prepare resin pellets. The obtained composition was injection-molded with an injection molding machine (FANUC i100) at a cylinder temperature of 300 ° C. and a mold temperature of 120 ° C. to obtain a test piece for evaluation. The evaluation results are shown in Table 2.

<Example 2>
A test specimen for evaluation was obtained in the same manner as in Example 1 except that PA2 was used instead of PA1. The evaluation results are shown in Table 2.

<Example 3>
A test specimen for evaluation was obtained in the same manner as in Example 1 except that PA3 was used instead of PA1. The evaluation results are shown in Table 2.

<Comparative Example 1>
Polyamide 6T (manufactured by Solvay, trade name Amodel) is supplied to the base hopper of a twin-screw extruder (trade name: TEM37BS) manufactured by Toshiba Machine Co., Ltd. at a speed of 8 kg / h, cylinder temperature: 300 to 340 ° C., screw rotation Extrusion was performed at several 150 rpm, and glass fibers were side fed at a rate of 2 kg / h to prepare resin pellets. The obtained composition was injection molded with an injection molding machine (FANUC i100) at a cylinder temperature of 340 ° C. and a mold temperature of 130 ° C. to obtain test specimens for evaluation. The evaluation results are shown in Table 2.

<Comparative Example 2>
Polyamide 46 (manufactured by DSM, trade name Stanyl) is supplied to the base hopper of a twin-screw extruder (trade name: TEM37BS) manufactured by Toshiba Machine Co., Ltd. at a speed of 8 kg / h, cylinder temperature: 290 to 310 ° C., screw rotation Extrusion was performed at several 150 rpm, and glass fibers were side fed at a rate of 2 kg / h to prepare resin pellets. The obtained composition was injection molded with an injection molding machine (FANUC i100) at a cylinder temperature of 310 ° C. and a mold temperature of 120 ° C. to obtain test specimens for evaluation. The evaluation results are shown in Table 2.

As is apparent from Table 2, each example has equivalent heat resistance and is excellent in mechanical properties and various physical properties with low water absorption.

Claims (8)

Polyamide (A) and fibrous filler (B) comprising a diamine unit containing 70 mol% or more of paraxylylenediamine units and a dicarboxylic acid unit containing 70 mol% or more of a linear aliphatic dicarboxylic acid unit having 6 to 18 carbon atoms A transport equipment component comprising a polyamide resin composition containing 5 to 200 parts by mass of a fibrous filler (B) with respect to 100 parts by mass of polyamide (A). The transportation equipment part according to claim 1, wherein the linear aliphatic dicarboxylic acid unit is at least one selected from an azelaic acid unit, a sebacic acid unit, an undecanedioic acid unit, and a dodecanedioic acid unit. The transport equipment part according to claim 1 or 2, wherein the linear aliphatic dicarboxylic acid unit is at least one selected from sebacic acid units and azelaic acid units. The polyamide (A) is a polyamide comprising a diamine unit containing 90 mol% or more of paraxylylenediamine units, and a dicarboxylic acid unit containing 90 mol% or more of at least one selected from sebacic acid units and azelaic acid units. A transport equipment part according to any of the above. The transportation equipment part according to any one of claims 1 to 4, wherein the polyamide (A) has a relative viscosity of 1.8 to 4.2. The number average molecular weight (Mn) in the gel permeation chromatography measurement of the polyamide (A) is in the range of 10,000 to 50,000, and the dispersity (weight average molecular weight / number average molecular weight = Mw / Mn) is 1.5. It is the range of -5.0, The transport equipment component in any one of Claims 1-5. The transport equipment part according to any one of claims 1 to 6, wherein the fibrous filler (B) is at least one selected from glass fiber, carbon fiber and metal fiber. The transport equipment part according to claim 1, which is an automobile part.