JPH09328608A - Polyamide resin composition and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition excellent in mechanical characteristics, heat resistance, etc., by blending a reinforced polyamide resin into which a swelling fluoromica-based mineral is uniformly dispersed with a specific amount of a polyamide resin having a prescribed amino end group concentration. SOLUTION: This composition comprises (A) 1-99 pts.wt. of a reinforced polyamide resin (nylon 6 or its copolymer) into which a swelling fluoromica- based mineral is uniformly dispersed and (B) 99-1 pts.wt. of a polyamide resin having >=0.04mmol/g amino end group concentration. In the component A, the reinforced polyamide resin contains preferably 1-50wt.% of the swelling fluoromica-based mineral. Preferably, the composition is obtained by blending the components A and B by using a single screw blender or a twin screw blender having 20-45 L/D (length/diameter) for 20-200 seconds retention time in a molten state. Consequently, the objective material excellent in alloy formation and dyeability with a thermoplastic resin is obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention comprises a reinforced polyamide resin (nylon 6 or a copolymer thereof) in which a swelling fluoromica-based mineral is uniformly dispersed, and a polyamide resin having a specific amino terminal group concentration. The present invention relates to a polyamide resin composition having good mechanical properties and heat resistance, excellent alloying with a thermoplastic resin and excellent dyeability, and a method for producing the same.

[0002]

Polyamide resin is an engineering plastic having excellent mechanical properties, sliding properties, thermal properties, chemical resistance, etc., and is widely used as parts for automobiles, home appliances, office equipment, connectors, etc. There is. In addition, recently, an alloying technique that skillfully utilizes the properties of each resin has been developed, and a polyamide resin is alloyed with various thermoplastic resins.

Conventionally, a resin composition in which a polyamide resin is reinforced with an inorganic filler such as glass fiber, calcium carbonate, clay mineral and natural mica is widely known. However, regarding the material containing the polyamide resin, the inorganic filler is not uniformly dispersed in the polyamide resin by simply mixing and kneading these inorganic fillers, so that a reinforced polyamide resin composition having satisfactory properties is obtained. I can't.

Therefore, as a method for improving the properties of the polyamide resin by adding a small amount of a reinforcing material, a technique of uniformly dispersing a clay mineral such as a layered silicate in the polyamide resin has been proposed. For example, JP-A-62-74957, JP-A-1-301750, JP-A-2-866628 and the like disclose polyamide resin compositions comprising a polyamide resin and montmorillonite. Furthermore, JP-A-6-2481
Japanese Patent Publication No. 76 discloses a polyamide resin composition comprising a polyamide resin and a specific swelling fluoromica-based mineral.

These polyamide resin compositions are resin compositions having high strength, high elasticity and high heat resistance, which are obtained by uniformly dispersing various layered silicates in the polyamide resin. However, in these resin compositions, it is difficult to control the amino terminal group concentration because the amino terminal groups and the layered silicate in the polyamide resin have some kind of ionic bond, and it is difficult to control the concentration of amino terminal groups other than the polyamide resin. It was not satisfactory in terms of alloying with the thermoplastic resin and dyeability.

In order to solve this problem, Japanese Patent Publication No. 7-4
In 7644, by using a specific amount of a layered silicate in which interlayer ions are replaced by an onium salt, the reaction rate between the polyamide resin and the layered silicate is reduced, and the amino terminal group of the polyamide resin itself is effectively used. The method of doing is proposed. However, in this method, in order to uniformly disperse the layered silicate in the polyamide resin, a large amount of the layered silicate is previously dispersed in a dispersion medium (water, methanol, ethanol, ε-).
It was necessary to swell in caprolactam, etc.), melt-knead this with a polyamide resin, and then remove the dispersion medium. Therefore, the use of this dispersion medium makes the melt-kneading step difficult, and requires a refining step for removal, which is not preferable in terms of the step, and in the art,
There has been a strong demand for a method of uniformly dispersing a layered silicate in a polyamide resin without using such a dispersion medium.

Generally, in alloying a polyamide resin with a thermoplastic resin, the concentration of amino terminal groups in the polyamide resin plays an important role. Further, this amino terminal group concentration also has a great influence on the dyeability of the obtained resin composition. The present invention has been made based on these findings.

[0008]

DISCLOSURE OF THE INVENTION The present invention is to provide a polyamide resin composition having good mechanical properties and heat resistance, and excellent alloying with a thermoplastic resin and dyeability, and a method for producing the same. To do.

[0009]

Means for Solving the Problems As a result of intensive studies to solve such problems, the present inventors have found that a swellable fluoromica-based mineral is uniformly dispersed in a reinforced polyamide resin (nylon 6 or The inventors have found that this object can be achieved by blending a specific amount of the copolymer) and a polyamide resin having a specific amino terminal group concentration, and have reached the present invention.

That is, the gist of the present invention is as follows. (1) (A) Reinforced polyamide resin (nylon 6 or its copolymer) in which swelling fluoromica-based mineral is uniformly dispersed 1
A polyamide resin composition comprising 99 parts by weight and (B) 99 to 1 part by weight of a polyamide resin having an amino terminal group concentration of 0.04 mmol / g or more. (2) (A) Reinforcing polyamide resin (nylon 6 or its copolymer) in which swelling fluoromica mineral is uniformly dispersed 1
99 parts by weight and (B) amino terminal group concentration of 0.04 mmol / g or more polyamide resin 99-1 parts by weight, using a uniaxial or biaxial kneader having a screw L / D 20-45, residence time 20
The method for producing a polyamide resin composition as described above, which comprises melt-kneading in about 200 seconds.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

In the present invention, (A) a reinforced polyamide resin (nylon 6) in which a swellable fluoromica-based mineral is uniformly dispersed.
Or its copolymer) (hereinafter referred to as "reinforced polyamide resin (A)"
". ) Is a specific amount of a swellable fluoromica-based mineral uniformly dispersed in nylon 6 or its copolymer.

The term “uniformly dispersed” means that the swelling fluoromica-based minerals are one by one or have an average overlap of 5
It means a state in which multi-layered objects of layers or less are in parallel or randomly, or in a state in which parallel and random are mixed, and 50% or more, preferably 70% or more thereof are dispersed without forming lumps.

Nylon 6 or its copolymer constituting the reinforced polyamide resin (A) is prepared by using ε-caprolactam and / or 6-aminocarboxylic acid as a main monomer raw material, adding a copolymerization monomer as necessary, and melting it. It is produced by polymerization. Its relative viscosity is 96% as solvent
It is preferably in the range of 1.5 to 5.0 as a value obtained by using concentrated sulfuric acid at a temperature of 25 ° C. and a concentration of 1 g / dl. If the relative viscosity is less than 1.5, the mechanical performance of the molded product deteriorates, which is not preferable. On the other hand, when it exceeds 5.0, the moldability of the resin composition is rapidly lowered, which is not preferable.

At this time, various copolymerizable monomers include various aminocarboxylic acids or lactams and nylon salts,
Specifically, 11-aminoundecanoic acid, 12-aminododecanoic acid, para-aminomethylbenzoic acid, ω-laurolactam, nylon 46 salt, nylon 66 salt, nylon 610 salt, nylon 6T salt, nylon 6I salt, meta-xylylenediene Examples thereof include salts of amine and adipic acid.

When the reinforced polyamide resin (A) is produced, usually, a swelling fluoromica-based mineral is added to the monomer for polymerization.

The swellable fluoromica-based mineral according to the present invention is represented by the following formula. αMF · β (aMgF ₂ · bMgO) · γSiO ₂ (where M represents sodium or lithium, α, β,
γ, a and b represent coefficients, respectively, 0.1 ≦ α ≦ 2, 2 ≦ β
≦ 3.5, 3 ≦ γ ≦ 4, 0 ≦ a ≦ 1, 0 ≦ b ≦ 1, a + b
= 1. )

As a method for producing such a swellable fluoromica-based mineral, there is a method in which talc is used as a starting material and alkali ions are intercalated into the starting material to obtain a swellable fluoromica-based mineral (Japanese Patent Laid-Open No. HEI-2). -149415 publication). In this method, talc is mixed with alkali silicofluoride or alkali fluoride, and then 700-1200 ° C in a magnetic crucible.
A swelling fluoromica-based mineral is obtained by heating for a short time at. The swellable fluoromica-based mineral used in the present invention is particularly preferably one produced by this method.

In order to obtain the above-mentioned swelling fluoromica-based mineral, it is necessary that the alkali metal silicofluoride or alkali metal fluoride is sodium or lithium. These alkali metals may be used alone or in combination. Of the alkali metals, potassium is not preferable because it does not give a swelling fluoromica-based mineral, but it can be used in combination with sodium or lithium and can be used for the purpose of adjusting the swelling property in a limited amount. Is. Further, the amount of alkali silicofluoride or alkali fluoride mixed with talc is preferably in the range of 10 to 35% by weight based on the whole mixture, and if it is out of this range, the yield of swelling fluoromica-based minerals decreases.

Further, in the step of producing the swellable fluoromica-based mineral, it is possible to add a small amount of alumina to control the swelling property of the swellable fluoromica-based mineral produced.

The term "swelling property" as used in the present invention means that the fluoromica-based mineral absorbs polar molecules such as aminocarboxylic acid and water or cations between the layers to increase the interlayer distance or further swelling and cleaving. , Which means the property of forming ultra-fine particles, and the fluoromica-based mineral represented by the above formula exhibits such swelling property.

The above-mentioned swelling fluoromica-based minerals usually have a side of 10 μm or less and a thickness of 0.1 μm or less and a layer thickness in the c-axis direction of 9 to 20 Å measured by an X-ray powder method. .

In the present invention, the content of the swellable fluoromica-based mineral is 1 to 50 with respect to the entire reinforced polyamide resin (A).
It is preferably in the range of wt%, particularly preferably in the range of 1 to 20 wt%. If this content is less than 1% by weight, the effect of improving mechanical strength, heat resistance and dimensional stability will not be sufficiently exerted, and if it exceeds 50% by weight, the toughness will be greatly reduced, which is not preferable.

In order to uniformly disperse the swellable fluoromica-based mineral in the polyamide resin (nylon 6 or its copolymer), a predetermined amount of the swellable fluoromica-based mineral is present with respect to the monomer forming the polyamide resin. A method of polymerizing the monomer in the allowed state is preferable. In this case, a reinforced polyamide resin in which the swelling fluoromica-based mineral is uniformly finely dispersed in the polyamide resin is obtained. In the present invention, it is not necessary to perform the swelling treatment in advance, and a swelling fluoromica-based mineral is blended in the monomer as it is in a predetermined amount and polymerized to obtain a reinforced polyamide resin in which a reinforcing agent is uniformly dispersed. You can

In the present invention, the (B) amino terminal group concentration is 0.
A polyamide resin of 04 mmol / g or more (hereinafter referred to as “polyamide resin (B)”) means that the content of amino groups determined by the end group titration of the polymer is 0.04 mmol or more per 1 g, and These are produced using aminocarboxylic acid, lactam or diamine and dicarboxylic acid as main monomer raw materials.

To obtain this polyamide resin (B), an excess of amines and / or its derivatives is added to the monomers forming the polyamide resin and polymerization is carried out, or the polymerization conditions are moderated and the number of polymers is increased. The average molecular weight may be lowered.

The amino terminal group concentration of the polyamide resin (B) is required to be 0.04 mmol / g or more and 0.06 mmol / g.
It is particularly preferable that it is / g or more. This concentration is 0.04 mmol
If less than / g, the polyamide resin composition obtained by melt-kneading the polyamide resin (B) and the reinforced polyamide resin (A) has too low an amino terminal group concentration, and is a resin excellent in alloying and dyeability. No composition is obtained.

The amines used in producing the polyamide resin (B) include propenylamine, ethylamine,
Diethylamine, aniline, toluidine, α-naphthylamine, t-butylamine, hexamethylenediamine,
Examples thereof include dodecane methylene diamine, and hexamethylene diamine and dodecane methylene diamine are particularly preferable.

Examples of the monomer forming the above polyamide resin (B) are as follows.

Examples of aminocarboxylic acids include 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and para-aminomethylbenzoic acid.

As the lactam, ε-caprolactam, ω
-Laurolactam and the like.

As the diamine, tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, 2, 4-dimethyloctamethylenediamine,
Meta-xylylenediamine, para-xylylenediamine, 1,
3-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, 3,8-bis (aminomethyl) tricyclodecane, bis (4-aminocyclohexyl) methane, bis (3-Methyl-4-aminocyclohexyl) methane, 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine and the like.

The dicarboxylic acids include adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, 2
-Chloroterephthalic acid, 2-methylterephthalic acid, 5-
Examples include methyl isophthalic acid, 5-sodium sulfoisophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, diglycolic acid and the like.

Preferred examples of the polyamide resin (B) include polycaproamide (nylon 6), polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), polyhexamethylene sebacamide. (Nylon 610), polyhexamethylene dodecamide (nylon 612), polyundecamethylene adipamide (nylon 116), polyundecane amide (nylon 1)
1), polydodecanamide (nylon 12), polytrimethylhexamethylene terephthalamide (nylon TMD
T), polyhexamethylene isophthalamide (nylon 6
I), polyhexamethylene terephthal / isophthalamide (nylon 6T / 6I), polybis (4-aminocyclohexyl) methandodecamide (nylon PACM12), polybis (3-methyl-4-aminocyclohexyl) methandodecamide (nylon dimethylPACM12) ), Polymethaxylylene adipamide (nylon MDX6), polyundecamethylene terephthalamide (nylon 11T), polyundecamethylene hexahydroterephthalamide (nylon 11T)
(H)) and their copolyamides, mixed polyamides and the like. Among these, nylon 6, nylon 46, nylon 66, nylon 11, nylon 12 and copolyamides and mixed polyamides thereof are particularly preferable.

The relative viscosity of the polyamide resin (B) is preferably in the range of 1.5 to 5.0 as determined by using 96% concentrated sulfuric acid as a solvent and at a temperature of 25 ° C. and a concentration of 1 g / dl.
If the relative viscosity is less than 1.5, the mechanical performance of the molded product deteriorates, which is not preferable. On the contrary, this is 5.0
When it exceeds, the moldability of the resin composition is rapidly lowered, which is not preferable.

The amount of the polyamide resin (B) blended should be 99 to 1 part by weight relative to 1 to 99 parts by weight of the reinforced polyamide resin (A). More preferably, it is 95 to 5 parts by weight with respect to parts.
If the content of the polyamide resin (B) exceeds 99 parts by weight, a molded product excellent in mechanical properties and heat resistance cannot be obtained. On the other hand, if the amount is less than 1 part by weight, a polyamide resin composition excellent in alloying and dyeability cannot be obtained, which is not preferable.

Next, a method for producing the polyamide resin composition of the present invention will be described. In producing the polyamide resin composition, 1/99 parts by weight of the reinforced polyamide resin (A) and 99-1 parts by weight of the polyamide resin (B) are mixed with L / D 20-45.
Melt-kneading is performed using a uniaxial or biaxial kneading machine having a screw. At this time, in order to obtain a polyamide resin composition having a desired amino terminal group concentration, it is necessary to adjust the residence time of the resin in the kneader, and this residence time is usually in the range of 20 to 200 seconds. It is necessary to

When the L / D of the screw is less than 20 or the residence time is less than 20 seconds, the kneading of the reinforced polyamide resin (A) and the polyamide resin (B) becomes insufficient and the reinforced polyamide resin ( The swellable fluoromica-based mineral in A) is not uniformly dispersed in the resin composition after melt kneading, and a polyamide resin composition having sufficient physical properties cannot be obtained. vice versa,
If the L / D exceeds 45 or the residence time exceeds 200 seconds, the reaction rate of the amino terminal groups in the polyamide resin (B) will increase, and the amino terminal groups of the resin composition obtained will decrease, resulting in alloying. It is not preferable because a polyamide resin composition having excellent coloring and dyeing properties cannot be obtained.

In the polyamide resin composition of the present invention, if necessary, a heat stabilizer, a light stabilizer, an antioxidant, a plasticizer, a lubricant, a colorant, a pigment, a foaming agent, a flame retardant, a moldability improving agent, Additives such as a reinforcing agent, a lubricant and an antistatic agent can be used in combination.

Further, the resin composition of the present invention may be used alone, or may be alloyed with another thermoplastic resin for use. Examples of such a thermoplastic resin include polypropylene, ABS resin, polyphenylene oxide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyarylate, and various elastomers.

At this time, the resin composition is made into a pellet form, a powder form or any other form, and then variously known by a generally known plastic molding method such as injection molding, extrusion molding, press molding, blow molding or vacuum molding. Although it can be processed into a molded article, the injection molding method is particularly preferably adopted.

[0042]

EXAMPLES Next, the present invention will be described in detail with reference to examples. The raw materials and measuring methods used for the evaluation of the examples and comparative examples are as follows. (I) Raw material Swellable fluoromica mineral Mineral talc ground by a ball mill to have an average particle size of 2 μm was mixed with sodium silicate having the same average particle size of 2 μm so that the total amount was 20% by weight. This was placed in a magnetic crucible and kept at 800 ° C. for 1 hour in an electric furnace to synthesize a fluoromica-based mineral. As a result of measuring the generated fluoromica-based mineral by the X-ray powder method, the peak for the thickness 9.2Å of the raw material talc in the c-axis direction disappeared, and the peak corresponding to 12 to 16Å indicating the formation of the swelling fluoromica-based mineral was found. Admitted. Amine Hexamethylenediamine (Nacalai Tesque, special grade,
Hereinafter, it is abbreviated as "HMDA". ) Reinforced polyamide resin (A) 10 kg of ε-caprolactam was mixed with 1 kg of water and 400 g of a swelling fluoromica-based mineral, and this was placed in a reactor having an internal volume of 30 liters to polymerize ε-caprolactam, A reinforced nylon 6 resin (A) was obtained. The polymerization reaction was performed as follows. That is, the raw material mixture was heated to 250 ° C. with stirring, the pressure was raised to 15 kg / cm ² while gradually releasing steam, and then the pressure was released to normal pressure, followed by polymerization at 260 ° C. for 3 hours. At the end of the polymerization, the reinforced nylon 6 resin (A) was discharged from the reaction vessel, and cut into pellets. The pellets were treated with hot water at 95 ° C., refined, and then dried in vacuum. The relative viscosity of this reinforced nylon 6 resin (A) was 2.53. Polyamide resin (B-1) 10 kg of ε-caprolactam was mixed with 1 kg of water and 23.2 g of HMDA, and this was placed in a reaction vessel with an internal volume of 30 liters to polymerize ε-caprolactam, and the amino end group concentration was determined. A controlled nylon 6 resin (B-1) was obtained. The polymerization reaction was performed as follows. That is, the raw material mixture is heated to 250 ° C. with stirring, and while gradually releasing steam, 5 kg / c
After raising the pressure to m ² and then releasing the pressure to normal pressure,
Polymerization was carried out at 0 ° C. for 3 hours. At the end of the polymerization, nylon 6 resin (B-1) was discharged from the reactor and cut into pellets. The pellets were treated with hot water at 95 ° C., refined, and then dried in vacuum. This nylon 6 resin (B-
The relative viscosity of 1) was 2.50. Polyamide resin (B-2) 10 kg of nylon 66 salt, 3 kg of water and 23.2 g of HMD
Mix A and put it in a reactor with an internal capacity of 30 liters.
The nylon 66 salt was polymerized to obtain a nylon 66 resin (B-2) having a controlled amino end group concentration. The polymerization reaction was performed as follows. That is, the raw material mixture was heated to 280 ° C. with stirring, the pressure was raised to 18 kg / cm ² while gradually releasing steam, and then the pressure was released to normal pressure, followed by polymerization at 280 ° C. for 3 hours. Nylon 66 was removed from the reactor at the end of the polymerization.
Take out the resin (B-2), cut it into pellets,
Vacuum dried. The relative viscosity of this nylon 66 resin (B-2) is
It was 2.65. Polyamide resin (B-3) 10 kg of ε-caprolactam was mixed with 1 kg of water and 24.4 g of benzoic acid, and the mixture was placed in a reactor having an internal volume of 30 liters to polymerize ε-caprolactam, and amino terminal group was added. A nylon 6 resin (B-3) having a controlled concentration was obtained. The polymerization reaction was performed as follows. That is, the raw material mixture is heated to 250 ° C. with stirring, and while gradually releasing steam, 5 kg / c
After raising the pressure to m ² and then releasing the pressure to normal pressure,
Polymerization was carried out at 0 ° C. for 3 hours. At the end of the polymerization, nylon 6 resin (B-3) was discharged from the reactor and cut into pellets. The pellets were treated with hot water at 95 ° C., refined, and then dried in vacuum. This nylon 6 resin (B-
The relative viscosity of 3) was 2.64.

Table 1 shows the terminal group concentrations and bending properties of the above-mentioned reinforced polyamide resin (A) and polyamide resins (B-1) to (B-3).

[0044]

[Table 1]

(II) Measurement method (a) Amino terminal group concentration 0.5 g of a sample was precisely weighed, dissolved in 20 ml of m-cresol by heating, and dissolved in m-cresol of 1/10 normal p-toluenesulfonic acid / Titration was performed with a methanol mixed solution (m-cresol / methanol volume ratio, 7/3). (b) Carboxyl end group concentration 0.5 g of a sample was precisely weighed, dissolved in 25 ml of benzyl alcohol by heating, and titrated with a 1 / 30N sodium hydroxide benzyl alcohol solution. (c) Flexural strength and flexural modulus Measured based on ASTM D-790. (d) Dyeability The test piece used for the bending strength test was dyed in the following acidic dye solution, washed with water, and visually evaluated for the dyed state of the test piece. ◯: Good dyeability ×: Poor dyeability “Composition of acid dye solution: Scarlet BA (Red) (Sumitomo Chemical Co., Ltd.) 1.0 g Leveling agent Levelan NDK (Maruhishi Yuka Co., Ltd.) 2.0 g acetic acid 0.5 cc pure water 5 liters Dyeing method: Soak the test piece in the acid dye solution, and
The temperature is raised to 00 ° C at a rate of 3 ° C / min and kept at 100 ° C for 30 minutes for dyeing.

Examples 1 to 4 The reinforced polyamide resin (A) and the polyamide resin (B-1) were
Twin-screw extruder (made by Ikegai Tekko Co., Ltd., PCM-45 type, screw type
L / D = 30) was used, melt-kneaded under the conditions shown in Table 2, and then dispensed in strands to obtain a polyamide resin composition pellet. Next, this pellet was injection-molded using the above-mentioned twin-screw extruder at a cylinder temperature of 250 ° C, a mold temperature of 70 ° C, an injection time of 6 seconds, and a cooling time of 6 seconds. A piece was prepared and a physical property test was conducted. Table 2 shows the obtained results.

[0047]

[Table 2]

Examples 5 to 8 A reinforced polyamide resin (A) and a polyamide resin (B-2) were used,
Twin-screw extruder (made by Ikegai Tekko Co., Ltd., PCM-45 type, screw type
L / D = 30) was used, melt-kneaded under the conditions shown in Table 3, and then dispensed in strands to obtain a polyamide resin composition pellet. Next, in the same manner as in Examples 1 to 4, the thickness 1
A / 8 inch test piece was prepared and a physical property test was conducted. Table 3 shows the obtained results.

[0049]

[Table 3]

Comparative Examples 1-2 Residence time during melt-kneading and L of screw of twin-screw extruder
A polyamide resin composition pellet was obtained in the same manner as in Examples 1 to 4 except that / D was changed as shown in Table 4. Then, a 1/8 inch-thick test piece was prepared using this pellet. Then, a physical property test was conducted.

Comparative Example 3 Polyamide Resin (B-3) Instead of Polyamide Resin (B-1)
A pellet of the polyamide resin composition was obtained in the same manner as in Example 1, except that
A / 8 inch test piece was prepared and a physical property test was conducted.

The results of the above Comparative Examples 1 to 3 are summarized in Table 4.

[0053]

[Table 4]

[0054]

According to the present invention, it is possible to obtain a polyamide resin composition which has good mechanical properties and heat resistance, and which is excellent in alloying with a thermoplastic resin and dyeability.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Izumi Yoshida 23 Uji Kozakura, Uji-city, Kyoto Pref.

Claims (4)

[Claims] 1. 1 to 99 parts by weight of (A) reinforced polyamide resin (nylon 6 or its copolymer) in which swellable fluoromica mineral is uniformly dispersed, and (B) amino terminal group concentration is 0.04 mm.
A polyamide resin composition comprising 99 to 1 part by weight of a polyamide resin having an ol / g or more. 2. The polyamide resin composition according to claim 1, wherein the reinforced polyamide resin (nylon 6 or a copolymer thereof) contains 1 to 50% by weight of a swellable fluoromica-based mineral. 3. (A) 1 to 99 parts by weight of a reinforced polyamide resin (nylon 6 or a copolymer thereof) in which a swelling fluoromica-based mineral is uniformly dispersed, and (B) an amino end group concentration of 0.04 mm.
Melt-knead 99 to 1 part by weight of polyamide resin of ol / g or more with a uniaxial or biaxial kneader having a screw of L / D (length / diameter) 20 to 45 with a residence time of 20 to 200 seconds. The method for producing a polyamide resin composition according to claim 1, wherein 4. The method for producing a polyamide resin composition according to claim 3, wherein the reinforced polyamide resin (nylon 6 or a copolymer thereof) contains 1 to 50% by weight of a swellable fluoromica-based mineral.