JPS6411073B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a reinforced polyamide composition for molding that has excellent properties in terms of heat resistance, mechanical properties, chemical and physical properties, and molding properties. In general, thermoplastic resins such as polyolefins, polyesters, and polyamides can be melt-molded such as compression molding, injection molding, or extrusion molding, and have excellent moldability, but have poor heat resistance, mechanical properties, and chemical properties. None of these properties are satisfactory as engineering plastics, and they are used in various general-purpose molding fields by taking advantage of their respective characteristics. In order to improve the heat resistance properties, mechanical properties, or chemical and physical properties of these thermoplastic resins, compositions containing fillers such as glass powder, graphite powder, glass fiber, and carbon fiber are used. Proposed. Although the above-mentioned properties of reinforced thermoplastic resin compositions containing these fillers are considerably improved, they do not satisfy all of the properties required for high-performance engineering plastics. As mentioned above, plastic resins are only used in the field of molding, making use of their respective characteristics. Conventionally, polytetrafluoroethylene (Teflon), polyparaphenylene terephthalamide (Kevlar), 4,4'-diaminodiphenyl ether, and other engineering plastics with excellent heat resistance, mechanical properties, and chemical and physical properties have been used. Polyimide consisting of a condensate with pyromellitic anhydride (Kapton), polyhexamethyleneaziboamide (6,6-nylon), poly2,2,
4-trimethylhexamethylene terephthalamide (Trogamide T), polyphenylene sulfide,
Polyacetal etc. are known. Among these, polytetrafluoroethylene, polyterephthaloyl paraphenylene diamine, and the above-mentioned polyimide resins have excellent heat resistance, mechanical properties, and chemical and physical properties, but have the disadvantage that they cannot be melt-molded. However, its field of use is extremely limited. Among these engineering plastics, polyphenylene sulfide, polyhexamethylene adipamide (6,6-nylon), 2,2,4-trimethylhexamethylene terephthalamide (Trogamide T)
), polyacetal, etc. all have the characteristic of being able to be melt-molded, but polyphenylene sulfide has heat resistance properties such as melting point, glass transition point, and heat distortion temperature, and mechanical properties such as impact strength and abrasion resistance. Polyhexamethyleneadipamide (6,6-nylon) and poly2,
Polyamides such as 2,4-trimethylhexamethylene terephthalamide (Trogamide T) have heat resistance properties such as glass transition temperature and heat distortion temperature.
Polyacetal has poor mechanical properties such as tensile strength, bending strength, critical PV value, abrasion resistance, and chemical and physical properties such as chemical resistance, boiling water resistance, and saturated water absorption, and polyacetal has poor heat resistance such as melting point and heat distortion temperature. Each has the disadvantage of being inferior in mechanical properties such as bending strength, impact strength, and abrasion resistance. The present inventors investigated a molding resin composition that has excellent performance in all of heat resistance properties, mechanical properties, chemical and physical properties, and molding properties, and found that the composition contains terephthalic acid component units as the main component. It has been found that a reinforced polyamide composition comprising a specific polyamide comprising an aromatic dicarboxylic acid component unit and a linear aliphatic alkylene diamine component unit and a filler in a specific amount with respect to the polyamide achieves the above object, and the present invention reached. According to the present invention, the reinforced polyamide composition for molding of the present invention has heat resistance properties such as melting point, glass transition temperature and heat distortion temperature, mechanical properties such as tensile strength, flexural strength, impact strength, coefficient of dynamic friction, and Taber abrasion. ,chemical resistance,
It is characterized by excellent chemical and physical properties such as boiling water resistance and saturated water absorption rate, and molding properties such as fluidity of the melt composition, melt compression moldability, melt injection moldability, and melt extrusion moldability. To summarize the present invention, the present invention provides: [A] an aromatic dicarboxylic acid consisting of 60 to 100 mol% of terephthalic acid component units and 0 to 40 mol% of aromatic dicarboxylic acid component units other than terephthalic acid component units; Consisting of component unit (a) and linear aliphatic alkylene diamine component unit (b) having 6 to 18 carbon atoms, and heated at 30°C in concentrated sulfuric acid.
The intrinsic viscosity [η] measured at is 0.5 to 3.0 dl/
[B] A polyamide in a range of 0.5 to 200 parts by weight based on 100 parts by weight of the polyamide, and an average particle size of 0.1 mμ
or 0.5 to 200 parts by weight of the polyamide;
A moldable polyamide composition comprising: an organic or inorganic fibrous filler having an average length of 0.1 to 20 mm and selected from the following group: Powder filler: Silica, silica alumina, alumina, talc, graphite, titanium dioxide, molybdenum disulfide, polytetrafluoroethylene Fibrous filler: Fully aromatic polyamide fiber, glass fiber, carbon fiber, boron fiber. be. The polyamide [A] blended as a resin component in the reinforced polyamide composition for molding of the present invention contains 60 to 100 mol% of terephthalic acid component units and 0 to 40 mol% of aromatic dicarboxylic acid component units other than terephthalic acid component units. % aromatic dicarboxylic acid component unit (a) and carbon number 6 to
It is a polyamide consisting of 18 linear aliphatic alkylene diamine component units (b), and the intrinsic viscosity [η] of the polyamide measured at 30°C in concentrated sulfuric acid is 0.5 to
It needs to be in the range of 3.0 dl/g, preferably 0.5 to 2.8, particularly preferably 0.6 to 2.8.
It is in the range of 2.5 dl/g. Specifically, the aromatic dicarboxylic acid component unit (a) constituting the polyamide [A] of the reinforced polyamide composition for molding of the present invention includes terephthalic acid, isophthalic acid, phthalic acid, 2-methylterephthalic acid, and naphthalene dicarboxylic acid. Examples of each component unit include acid. Aromatic dicarboxylic acid component unit
The composition (a) may consist of a single terephthalic acid component unit, or may be a mixture of a terephthalic acid component unit and the above-mentioned aromatic dicarboxylic acid component units other than the terephthalic acid component unit. In either case, the composition of the aromatic dicarboxylic acid component units (a) constituting the polyamide is in the range of 60 to 100 mol% of terephthalic acid component units and 0 to 100% of aromatic dicarboxylic acid component units other than terephthalic acid component units. 40
It is necessary that the amount be within the range of mol%. Furthermore, the composition of the aromatic dicarboxylic acid component unit (a) is such that when the linear aliphatic alkylene diamine component unit (b) constituting the polyamide is a straight chain aliphatic alkylene diamine having 6 carbon atoms, the terephthalic acid component unit is When the amount of aromatic dicarboxylic acid component units other than terephthalic acid component units is in the range of 60 to 85 mol% and in the range of 15 to 40 mol%, mechanical properties such as heat resistance properties such as heat distortion temperature, bending strength, and abrasion resistance This is particularly preferred since the properties and moldability are improved. In addition, when the linear aliphatic alkylene diamine component unit (b) constituting the polyamide is a linear aliphatic alkylene diamine having 8 carbon atoms, the terephthalic acid component unit
When it is in the range of 65 to 100 mol% and in the range of 0 to 35 mol% of aromatic dicarboxylic acid component units other than terephthalic acid component units, heat resistance properties such as heat distortion temperature, mechanical properties such as bending strength and abrasion resistance ,
This is particularly preferred since moldability is improved. In addition, when the linear aliphatic alkylene diamine component unit (b) constituting the polyamide is a linear aliphatic alkylene diamine having 10 to 18 carbon atoms, the terephthalic acid component unit is in the range of 75 to 100 mol% and the terephthalic acid component unit is It is particularly preferable that the aromatic dicarboxylic acid component units other than the above range from 0 to 25 mol %, since heat resistance properties such as heat distortion temperature, mechanical properties such as bending strength and abrasion resistance, and moldability are improved. . Aromatic dicarboxylic acid component unit
If the composition of (a) has a terephthalic acid component unit of less than 60 mol% and an aromatic dicarboxylic acid component unit other than terephthalic acid component units of more than 40 mol%, heat resistance properties such as heat distortion temperature, tensile strength, Mechanical properties such as abrasion resistance, chemical and physical properties such as chemical resistance and water resistance begin to deteriorate. Of the aromatic dicarboxylic acid component units other than the terephthalic acid component units of the aromatic dicarboxylic acid component unit (a) constituting the polyamide, isophthalic acid component units or naphthalene dicarboxylic acid component units are preferred, and isophthalic acid component units are particularly preferred. Preferably, it is an acid component unit. Further, the aromatic dicarboxylic acid component unit (a) constituting the polyamide is mainly composed of the terephthalic acid component unit and the aromatic dicarboxylic acid component unit other than the terephthalic acid component unit, but the above-mentioned essential In addition to the components, there is no problem even if a small amount of tribasic or higher polyhydric carboxylic acid component units such as trimellitic acid and pyromellitic acid are included. The linear aliphatic alkylene diamine component unit (b) constituting the polyamide [A] for the reinforced polyamide composition for molding of the present invention is a linear aliphatic alkylene diamine having 6 to 18 carbon atoms, and specifically teeth,
1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, 1,11
-diaminoundecane, 1,12-diaminododecane, and the like can be exemplified. These linear aliphatic alkylene diamine component units (b)
Among them, 1,16-diaminohexane component unit, 1,18-diaminooctane component unit, 1,10
-diaminodecane component units, 1,12-diaminododecane component units, or a mixture of these component units are preferred, and 1,10-diaminodecane component units are particularly preferred. Further, in the reinforced polyamide composition for molding of the present invention, the aromatic dicarboxylic acid component unit (a) constituting the polyamide [A] is mainly composed of a terephthalic acid component unit and a linear aliphatic alkylene diamine component unit. (b) is 1,6-diaminohexane, 1,8
A composition containing a polyamide of -diaminooctane, 1,10-diaminodecane or 1,12-diaminododecane is preferred, and a composition containing 1,10-diaminodecane is particularly preferred. The polyamide [A] blended into the reinforced polyamide composition for molding of the present invention can be produced by various conventionally known methods. for example,
The polyamide is described by Paul W. Morgan,
Published by Interscience publfshers (1965),
“Polymer Reviews 10 , Condensation
Polymers, By Interfacial and Solution
Methods” and Von H. Hopff and A. Krieger.
As described in Makromol . It can be produced by polycondensing an acid halide and a straight chain aliphatic alkylene diamine corresponding to the straight chain aliphatic alkylene diamine component unit (b) by a solution method, or by polycondensing by an interfacial method. It can also be manufactured by Further, a nylon containing an aromatic dicarboxylic acid corresponding to the aromatic dicarboxylic acid component unit (a) and a straight chain aliphatic alkylene diamine corresponding to the straight chain aliphatic alkylene diamine component unit (b) of the constituent component units of the polyamide. It can also be produced by heating a salt to produce an oligomer, followed by solid phase polymerization. Polyamide produced by any method can be used in the reinforced polyamide composition for molding of the present invention. As the filler [B], which is another component incorporated into the reinforced polyamide composition for molding of the present invention, a powder filler or a fibrous filler is used. Silica, silica alumina, alumina, talc, graphite, titanium dioxide, molybdenum disulfide, and polytetrafluoroethylene are used as the powder filler. Among these, graphite, molybdenum disulfide or polytetrafluoroethylene are particularly preferred. In particular, it is preferable to use graphite, molybdenum disulfide or polytetrafluoroethylene because the wear resistance of the molded article obtained from the composition, such as the dynamic friction coefficient, Taber wear, and critical PV value, will be improved. The average particle size of such fillers is usually in the range of 0.1 mμ to 200 μm, particularly preferably in the range of 1 mμ to 100 μm, since the above-mentioned wear resistance is significantly improved. The blending ratio of such filler is
It needs to be in the range of 0.5 to 200 parts by weight per 100 parts by weight, preferably 0.5 to 100 parts by weight.
Parts by weight are particularly preferably in the range from 0.5 to 50 parts by weight. As the fibrous filler, organic wholly aromatic polyamide fibers or inorganic glass fibers, carbon fibers, or boron fibers are used. Among the fillers, organic fibrous fillers include polyparaphenylene terephthalamide fiber, polymethaphenylene terephthalamide fiber, polyparaphenylene isophthalamide fiber,
Fully aromatic polyamide fibers such as polymetaphenylene isophthalamide fibers, fibers obtained from condensates of diaminodiphenyl ether and terephthalic acid or isophthalic acid are used. Use of such wholly aromatic polyamide fibers is preferred because the mechanical properties such as tensile strength and Izot impact strength, and heat resistance properties such as heat distortion temperature of the molded article obtained from the composition are improved. .
In addition, when inorganic fibers as mentioned above are used, the molded product obtained from the composition has mechanical properties such as tensile strength, bending strength, and flexural modulus, heat resistance properties such as heat distortion temperature, and chemical properties such as water resistance. This is preferable because physical properties and the like are improved. When the average length of the organic or inorganic fibrous filler is in the range of 0.1 to 20 mm, particularly in the range of 1 to 10 mm, the moldability of the composition is improved and the molded article obtained from the composition is improved. heat resistance properties such as heat denaturation temperature;
This is preferable because mechanical properties such as tensile strength and bending strength are improved. The blending ratio of the organic or inorganic fibrous filler is
It needs to be in the range of 0.5 to 200 parts by weight per 100 parts by weight, preferably 5 to 180 parts by weight.
Parts by weight range, particularly preferably from 5 to 150 parts by weight. If the blending ratio of the powdered or fibrous filler is more than 200 parts by weight per 100 parts by weight of the polyamide, the moldability of the composition and the flexibility of the molded product obtained from the composition will be significantly reduced. begins to decline. These fibrous fillers may be processed into a cloth shape or the like. The various powdery or fibrous fillers described above can be used alone or in combination. These fillers may be treated with silane coupler, titanium coupler, or the like. Also,
In addition to the powdery or fibrous fillers described above, the composition of the present invention may contain other fillers having various shapes such as plate-like or cross-like shapes as long as the object of the present invention is not impaired. good. In addition, in the present invention, powder fillers other than silica, silica alumina, alumina, talc, graphite, titanium dioxide, molybdenum disulfide, and polytetrafluoroethylene can be used in combination, and fully aromatic polyamide fibers can also be used. It is also possible to use fibrous fillers other than glass fiber, carbon fiber, and boron fiber in combination. The reinforced polyamide composition for molding of the present invention has the above-mentioned polyamide [A] and the above-mentioned filler [B] as essential constituents, and may be a composition consisting only of these two constituents; In addition to both essential components, the composition may also contain other components. Examples of components other than the above-mentioned essential components that may be blended into the reinforced polyamide composition for molding of the present invention as needed include conventionally known stabilizers, plasticizers, mold release agents, lubricants, and the like. Examples of the method for preparing the reinforced polyamide composition for molding of the present invention include a method in which a filler is blended while maintaining the polyamide of each of the constituent components in a molten state. Specifically, a method of melt-kneading and blending can be exemplified by a method of kneading and blending using an extruder, a kneader, or the like. The moldable reinforced polyamide composition of the present invention can be molded by conventional melt molding, such as compression molding, injection molding, or extrusion molding. Next, the reinforced polyamide composition for molding of the present invention will be specifically explained using Examples. Reference Examples 1 to 5 show the synthesis methods of polyamides used in Examples and Comparative Examples. Furthermore, a method for preparing a reinforced resin composition, a method for preparing a test piece from the reinforced resin composition, and a method for evaluating each performance were also shown. The following abbreviations used in Tables 1 and 3 below indicate the following compounds, respectively. TA: Terephthalic acid IA: Isophthalic acid C ₆ DA: 1,6-diaminohexane C ₈ DA: 1,8-diaminohexane C ₁₀ DA: 1,10-diaminodecane [] Reference example for the production of polyamide 1 1,6- 116 g (1 M) of diaminohexane, 220 g (2.1 M) of sodium carbonate, 20 g of sodium lauryl sulfate, and 55 g of ion-exchanged water were placed in a 4-necked 10 flask equipped with a stirring bar, a thermometer, and a reflux condenser, and the mixture was heated under an N ₂ atmosphere. The mixture was stirred at °C, and a solution of 152 g (0.75 M) of terephthaloyl chloride and 51 g (0.25 M) of isophthaloyl chloride in chloroform (4) was added dropwise over 10 minutes. 15 at 5℃ after application
After carrying out the reaction for a minute, the reaction mixture was diluted with acetone for 40 minutes.
The precipitated polymer was collected by suction using a glass filter. Polymer in hot water,
Then after washing with acetone, place in a vacuum oven.
234g after drying for 1 day at 100℃ and 100mmHg
(95%) of the polymer was obtained. Table 1 shows the mole %, [η], and melting point of the terephthalic acid component units in the polymer. Reference Examples 2 to 3 The terephthalic acid component units in the dicarboxylic acid component units were prepared according to the method described in Reference Example 1, except that the amounts of terephthaloyl chloride and isophthaloyl chloride used in Reference Example 1 were changed as described in Table 1. Polymers with different contents were obtained. The results are shown in Table 1.

[Table] Reference example 4 81 g (0.56 M) of 1,8-diaminooctane, 47 g (1.18 M) of sodium hydroxide, 11 g of sodium lauryl sulfate, 2.25 g of chloroform, and 5.6 g of ion-exchanged water were mixed with a stirring bar, a thermometer, and a reflux condenser. Prepared in a 4-necked flask and heated at 10℃ under _N2 atmosphere.
and add 91 g of terephthaloyl chloride to this mixture.
A solution of 23 g (0.11 M) of isophthaloyl chloride (0.45 M) in chloroform (3) was added dropwise over 7 minutes, and the reaction was then carried out at 10° C. for 20 minutes. The reaction mixture was poured into 30 mL of acetone, and the precipitated polymer was collected by suction using a glass filter. The polymer was washed with acetone, hot water, and then acetone, and then dried in a vacuum oven at 100° C. and 100 mmHg for one day to obtain 144 g (93%) of polymer. The TA component unit in the dicarboxylic acid component unit of the polymer is
78 mol%, [η] (conc. in H ₂ SO ₄ , 30 °C) is 0.82
dl/g, and the melting point was 310°C. Reference example 5 Terephthalic acid 232g (1.40M), 1,10-diaminodecane 241g (1.4M) and ion exchange water 10
was charged into 10 reactors equipped with a stirring bar, a thermometer, and a reflux condenser, and reacted for 1 hour at 95 to 100 °C under an _N2 atmosphere.The clear solution after the reaction was air-cooled, and the precipitated nylon salt was filtered by suction filtration. It was collected and dried at 100° C. and 100 mmHg to obtain 450 g (95%) of nylon salt of terephthalic acid-1,10-diaminodecane. Charge 450g (1.33M) of this nylon salt into reactor 1,
After reducing the pressure to 1 mmHg, a N ₂ air flow was introduced to clean the inside of the system.
After being placed under an N ₂ atmosphere, the water produced by a reaction at 310°C for 1.5 hours in a N ₂ stream was expelled from the system, and a polyamide consisting of terephthalic acid and 1,10-diaminodecane was produced.
390g (97%, [η] = 0.72dl/gconc.H ₂ SO ₄ ,
30℃) was obtained. The polyamide was pulverized using a crusher (32 mesh passes), 100°C, 1mm
After drying for 12 hours under Hg conditions, solid-phase polymerization was performed for 12 hours at 295℃ and 0.7 mmHg to obtain [η] (conc.H ₂ SO ₄
370 g (96%) of polyamide consisting of 1.25 dl/g of terephthalic acid component units and 1,10-diaminodecane component units was obtained. The melting point was 316°C. [] Preparation of reinforced resin composition The polyamide synthesized by the interfacial polymerization method was crushed using a crusher (32 mesh passes), and heated at 100℃.
After drying at 1 mmHg for 12 hours, a reinforced resin composition was prepared. In addition, the solid phase polymerized product was used as it was. To prepare a reinforced resin composition, a predetermined amount of sufficiently dried filler and a predetermined amount of polyamide are first dry blended under a nitrogen atmosphere. 20mm of this mixture
The mixture was melt-mixed using a vented extruder (screw L/D = 28) under a nitrogen atmosphere at a screw rotation speed of 30 rpm and a predetermined temperature and pressure to obtain a strand. This strand was cut into a length of 0.8 to 1 cm to prepare a filler-reinforced resin composition. [] Preparation of test pieces and evaluation method for each performance After drying the filler-reinforced resin composition at 100°C and 1 mmHg for 12 hours, it was molded using a press molding machine under a pressure of 100 kg/cm ² in a nitrogen atmosphere from the melting point. After hot pressing at a temperature 20°C higher, cold pressing was performed at a temperature of 20°C to produce compression molded plates with a thickness of 2 mm to 10 mm. These molded plates were cut into the dimensions of each test piece listed in Table 2, left in an atmosphere at a temperature of 23° C. and a relative humidity of 65% for 96 hours, and then subjected to testing.

[Table] Example 1 A glass fiber reinforced polyamide composition consisting of 100 parts by weight of the polyamide described in Reference Example 1 and 43 parts by weight of glass fibers with an average length of 6 mm (manufactured by Nittobo KK, Chip Strand CS 6PE-231) is shown. It was produced under the extrusion conditions described in 3. Table 3 shows the performance of test pieces prepared using this composition. Examples 2 to 4 In Example 1, the polyamide described in Table 3 was used instead of the polyamide described in Reference Example 1, and the glass fiber reinforced polyamide composition was produced under the extrusion conditions described in Table 3. A glass fiber reinforced polyamide was produced by the method described in Example 1.
Table 3 shows the performance of test pieces prepared using these compositions. Example 5 Instead of using glass fibers with an average length of 6 mm in Example 4, glass fibers with an average length of 3 mm (Nitto Boseki Co., Ltd.) were used.
A glass fiber-reinforced polyamide composition was produced by the method described in Example 4, except that KK Soko, Chipstrand CS 3PE-231) was used. Table 3 shows the performance of test pieces prepared using this composition. Examples 6 and 7 Example 4 except that the amount of glass fiber shown in Table 3 was used instead of 43 parts by weight of glass fiber in Example 4.
A glass fiber reinforced polyamide composition was produced by the method described in . Table 3 shows the performance of test pieces prepared using these compositions. Examples 8 to 11 100 parts by weight of the polyamide listed in Table 3 and the amount of carbon fiber (manufactured by Toray KK,
T008A, average length 3 mm or 6 mm) carbon fiber reinforced polyamide compositions were produced under the extrusion conditions listed in Table 3. Table 3 shows the performance of test pieces prepared using these compositions. Example 12 Polyparaphenylene terephthalamide fibers (manufactured by DuPont, Kevlar 49, average length 3 mm) were used instead of glass fibers in Example 6, but polyparaphenylene was produced by the method described in Example 6. A terephthalamide fiber-reinforced polyamide composition was prepared. Table 3 shows the performance of test pieces prepared using this composition. Comparative Example 1 Strands and test pieces were produced in the same manner as in Example 4, except that glass fiber was not used. The results are shown in Table 3. Comparative Example 2 A glass fiber-reinforced polyamide composition consisting of 100 parts by weight of the polyamide described in Reference Example 3 and 43 parts by weight of glass fibers having an average length of 6 mm (manufactured by Nittobo KK, Chipstrand CS 6PE-231) was listed in Table 3. Manufactured under extrusion conditions. Table 3 shows the sex of test pieces prepared using this composition. Comparative Example 3 A polyamide was produced in the same manner as in Comparative Example 2, except that glass fiber as a filler was not blended in Comparative Example 2. Table 3 shows the performance of test pieces made using this polyamide. Comparative Example 4 2,2, dried for 12 hours at 100℃ and 1mmHg
A polyamide dynamite (manufactured by Nobel, Trogamid T) consisting of 4-trimethylhexamethylenediamine component units and terephthalic acid component units was hot pressed at 275°C and a pressure of 100 kg/cm ² in a nitrogen atmosphere.
Next, a test piece was prepared by cold pressing at 20°C. The results are shown in Table 3. Comparative Example 5 Glass fiber-reinforced polyphenylene sulfide (Philip Co., Ltd., Ryton R-4, 40% glass fiber blended product) was dried for 12 hours at 100°C and 1 mmHg.
Hot press at 330℃ and 100Kg/ ^cm2 pressure, then
A test piece was prepared by cooling it at 20°C. The results are shown in Table 3. Comparative Example 6 Glass fiber-reinforced polyacetal (manufactured by Polyplastics Co., Ltd., Jyuracon GC-25, a product containing 25% glass fiber, dried for 12 hours at 100°C and 1 mmHg was hot pressed at 200°C and a pressure of 100 kg/cm ² in a nitrogen atmosphere. Then, a cold press test piece was prepared at 20°C.The results are shown in Table 3.

【table】

【table】

[Table] Examples 13 to 15 Polyamide compositions were prepared by the method described in Example 6, except that the fillers listed in Table 4 were used in the amounts listed in Table 4 instead of using glass fibers in Example 6. did. Table 4 shows the performance of test pieces prepared using these compositions.

【table】

【table】

Claims (1)

[Scope of Claims] 1 [A] 60 to 100 terephthalic acid component units
Aromatic dicarboxylic acid component unit (a) consisting of 0 to 40 mol% of aromatic dicarboxylic acid component units other than terephthalic acid component units and a linear aliphatic alkylene diamine component having 6 to 18 carbon atoms. It consists of unit (b) and [η] measured at 30℃ in concentrated sulfuric acid is 0.5 to 3.0 dl/
[B] A polyamide in a range of 0.5 to 200 parts by weight based on 100 parts by weight of the polyamide, and an average particle size of 0.1 mμ
or 0.5 to 200 parts by weight of the polyamide;
Weight range, average length 0.1 to 20mm
A moldable polyamide composition comprising an organic or inorganic fibrous filler within the range of and selected from the following group: Powdered filler: silica, silica alumina, alumina, talc, graphite, dioxide Titanium, molybdenum disulfide, polytetrafluoroethylene Fibrous fillers: Fully aromatic polyamide fibers, glass fibers, carbon fibers, boron fibers. 2. The polyamide composition for molding according to claim 1, wherein the aromatic dicarboxylic acid component unit other than terephthalic acid constituting the polyamide is an isophthalic acid component unit or a naphthalene dicarboxylic acid component unit. 3. The linear aliphatic alkylene diamine component unit (b) constituting the polyamide is a 1,6-diaminohexane component unit, a 1,8-diaminooctane component unit,
1,10-diaminodecane component unit or 1,12-
The moldable polyamide composition according to claim 1, which is a diaminododecane component unit. 4. The polyamide composition for molding according to claim 1, which is a polyamide whose intrinsic viscosity [η] measured in concentrated sulfuric acid at 30° C. is in the range of 0.6 to 2.5 μ/g.