JPH0286656A - Polyamide resin composition - Google Patents

Abstract

PURPOSE:To obtain a composition excellent in heat resistance, chemical resistance and mechanical properties and small in water absorptivity and molding shrinkage by mixing a polyamide resin with a cycloolefin random copolymer and an unsaturated carboxylic acid-containing cycloolefin copolymer. CONSTITUTION:This polyamide resin composition comprises a polyamide resin (A), a cycloolefin random copolymer (B) comprising an ethylene component and cycloolefins of formulas I and II and having an intrinsic viscosity [eta] of 0.05-10dl/g as measured in decalin at 135 deg.C and a softening temperature(TMA) >=70 deg.C and an unsaturated carboxylic acid-containing cycloolefin copolymer (C) comprising an ethylene component, cycloolefin components of formulas I and II and an unsaturated carboxylic acid or its derivative component and having an intrinsic viscosity [eta] of 0.05-10dl/g as measured in decalin at 135 deg.C and a content of carboxyl groups or its derivative groups, of 0.05-10mol% in such an amount that component (A) to component (B) weight ratio is 98/2-2/98 and the amount of component C is 1-100wt.% based on component A and B.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a polyamide resin composition that has excellent heat resistance and chemical resistance, low water absorption and mold shrinkage, and high mechanical strength. .

[Conventional technology]

Most polyamide resins are crystalline and have a relatively high melting point, so those containing fillers have a high heat distortion temperature.
Excellent heat resistance. However, when a filler is added, moldability deteriorates and anisotropy occurs in the physical properties of the molded product.

On the other hand, those without fillers have a high molding shrinkage rate, lack dimensional accuracy, and have poor heat resistance.

Furthermore, polyamide resins have problems in that they have poor acid resistance and alkali resistance, and high water absorption.

[Problem to be solved by the invention]

The purpose of the present invention is to solve the above-mentioned problems by maintaining the properties of polyamide resin while maintaining excellent heat resistance and chemical resistance.
Another object of the present invention is to obtain a polyamide resin composition having low water absorption and molding shrinkage, and high mechanical strength.

[Means to solve the problem]

The present invention comprises [A] a polyamide resin, [B] an ethylene component, and the following general formula (1) or [■
], and is composed of a cyclic olefin component represented by
The intrinsic viscosity [η] of 4111 in decalin is 0.0.
5 to 1 Odl/g, a cyclic olefin random copolymer having a softening temperature (TMA) of 70°C or higher, and [C
] Consists of an ethylene component, a cyclic olefin component represented by the following general formula (r) or [■], and an unsaturated carboxylic acid or its derivative component, and has an intrinsic viscosity [η] of 0.05 when measured in decalin at 135°C. ~10 dl/g, the content of carboxyl group or its derivative group is 0.05-1
Contains 0 mol% of an unsaturated carboxylic acid-containing cyclic olefin copolymer, and has a weight ratio of component [A]/component [8] of 98/2 to 2/98.
, a polyamide resin composition in which the acid component [C] is 1 to 100 parts by weight based on the total of 100 parts by weight of the components [A] and (B).

general formula It is resin.

[Wherein, n and m are both O or a positive integer, Q is an integer of 3 or more, and R1 to RIO each represent a hydrogen atom, a halogen atom, or a hydrocarbon group.

[In the formula, p and q are positive numbers] Yes 1. xL and R12RIJ each represent an aliphatic 5-alicyclic or aromatic hydrocarbon or a derivative thereof. ] Specifically, such polyamide resins include ring-opened polymers of lactams, which are cyclic amides (e.g., nylon 6 made from ε-cabralactam), polycondensates of aminocarboxylic acids (e.g., ω-aminoundecan, Nylon 11 produced from acids, nylon 12 produced from ω-aminododecanoic acid, polycondensates of dicarboxylic acids and diamines (e.g. nylon 6.6 produced from adipic acid and hexamethylene diamine, sebacin) Examples include nylon 6.10 manufactured from acid and hexamethylene diamine, and nylon 6.12) manufactured from dodecanedioic acid and hexamethylene diamine. These polyamide resins can be used alone or in combination of two or more.

Cyclic olefin random copolymer ([11] is a cyclic olefin random copolymer composed of an ethylene component and a specific cyclic olefin component. The cyclic olefin component has the above general formula [I] or general formula [11] ]
It is a cyclic olefin represented by, and in the cyclic olefin random copolymer [B) of the present invention, it forms a repeating unit having a structure represented by the following general formula (V) or general formula (VT).

[In the formula, n, m, Q and R1 to R10 are the same as above. ] The cyclic olefin that is a component of the cyclic olefin random copolymer [8] constituting the resin composition of the present invention is a group consisting of unsaturated monomers represented by general formula (1) and general formula (Il). At least one cyclic olefin selected from

The cyclic olefin represented by the general formula [1] is prepared by combining cyclopentadiene and the corresponding olefin with the Diels method.
It can be easily produced by condensation by Alder reaction. Similarly, the cyclic olefin represented by the general formula [H] can be easily produced by condensing a cyclopentadiene and a corresponding cyclic olefin by a Diels-Alder reaction.

Specifically, the cyclic olefin represented by the general formula [1] is a compound listed in Table 1 or l.

4.5.8-dimethano-1,2,3,4,4a,5,8
, 8a-octahydronaphthalene as well as 22-methyl-
1,4,5,8-dimethano-1,2,3,4,4a,5
, 8.8a-octahydronaphthalene, 2-ethyl-1
,4,5,8-dimethano-1,2,3,4,4a,5,
8.8a Octahydronaphthalene, 2-propyl-1,
4,5,8 dimethanol-1,2,3,4,4a,5,8.
8a-octahydronaphthalene, 2-hexyl-1,4
, 5,8-dimethano-1,2,3,4°4a, 5,8.
8a-octahydronaphthalene, 2,3-dimethyl-1
,4,5,8-dimethano-1,2,3,4,4a,5,
8,8a-octahydronaphthalene, 2-methyl-3-
Ethyl-1,4,5,8 Dimethano-1,2,3,4,4
a, 5,8.8a-octano1-lonaphthalene, 2-chloro-1,4,5,8-dimethano-1,2,3,4,4
a.

5.8.8a-Octahydronaphthalene, 2-bromo-
1,4゜5.8-dimethano-1,2,3,4,4a,5
, 8.8a-octahydronaphthalene, 2-fluoro-
1,4,5,8-dimethano-1,2゜3.4.4a,5
, 8.8a-octahydronaphthalene, 2,3-dichloro-1,4,5,8-dimethano-1,2,3,4,4a
, 5,8.8a-octano-1-lonaphthalene, 2-cyclohexyl-1,4,5°8-dimethano-1,2,3,
4,4a,5,8,8a-octahydronaphthalene, 2
-rl-butyl-+-, 4,5,8-dimethano-1,,
2, 3.

4, /Ia, 5,8.8a-octahydronaphthalene,
2-inbutyl-1,4,5,8-dimethano-1,2,
Examples include octahedral-1-lonaphthalenes such as 3,4,4a,5,8.8a-octahydronaphthalene, and the compounds listed in Table 2.

Examples of the cyclic olefin represented by the general formula [■] include the compounds shown in Table 3 and Table 4.

The cyclic olefin random co+li combination [[3] constituting the resin tit composition of the present invention has an ethylene component and the above cyclic olefin component as essential components, but in addition to these two essential components, the present invention also contains the following: As long as it does not damage your eyes,
If necessary, other copolymerizable unsaturated monomer components may be contained.

Unsaturated monomers which may be arbitrarily copolymerized, specifically, for example, bupyrene, 1-butene,
4-methyl-1-pentene, 1-xene, 1-octene,
Examples include α-oleins having 3 to 20 carbon atoms such as l-decene, -1-decene, tetradecene, 1-hexadecene, l-octatece, and 1-eicosene.

In the cyclic olefin random copolymer [B] constituting the resin composition of the present invention, the repeating unit (a) derived from the ethylene component is 40 to 85 mol%, preferably 50 to 75 mol%.
Mol% range, repeating 1 derived from cyclic olefin composition
18-position (b) is 15 to 60 mol%, preferably 25 to 5
A range of 0 mol% is appropriate, and the repeating unit (a) derived from the engineered ethylene component and the repeating unit (b) derived from the cyclic olefin component form a substantially linear cyclic olefin random copolymer arranged randomly. is forming.

The fact that the cyclic olefin random copolymer (B) is substantially linear and does not have a gel-like crosslinked structure can be confirmed by completely dissolving the copolymer in decalin at 135°C. .

Cyclic olefin random copolymer [B] constituting the resin composition of the present invention in decalin at 135°C? The intrinsic viscosity [η] determined by I11 is in the range of 0.05 to 10 mm/g, preferably 0.08 to 5 mm/g.

The cyclic olefin random copolymer [B] constituting the resin composition of the present invention has a softening temperature (TMA) determined by HIQ using a thermomechanical analyzer of 70°C or higher, preferably 90 to 250°C, more preferably ]0
The glass transition temperature (Tg) of the cyclic olefin random copolymer [B] is usually 50 to 230 in the range of 0 to 200°C.
℃, preferably in the range of 70 to 210℃.

The crystallinity of the cyclic olefin random copolymer (B) determined by X-ray diffraction is preferably in the range of 0 to 10%, preferably 0 to 7%, and particularly preferably 0 to 5%.

As the cyclic olefin copolymer [B) constituting the resin composition of the present invention, a copolymer consisting only of those having physical properties within the range described in 2. A part of the copolymer may be included, and in this case, it is sufficient that the overall physical property value is within the above range.

The cyclic olefin random copolymer (B) constituting the resin composition of the present invention is disclosed in JP-A-60-168708, JP-A-61-120816, and JP-A-61-11.
．． 591.2, JP 61-11591.6, JP 61-271308, JP 61-2
722] Publication No. 6, JP-A-62-252406,
By appropriately selecting conditions according to the method devised by the applicant in JP-A No. 62-252407, etc.
can be manufactured.

Examples of the unsaturated carboxylic acid or its derivative component which is a component of the unsaturated carboxylic acid-containing cyclic olefin copolymer [C] constituting the resin composition of the present invention include acrylic acid, methacrylic acid, crotonic acid, fumaric acid, etc. Acid, itaconic acid, citraconic acid, undecylenic acid, maleic anhydride, tetrahydrophthalic acid, incrotonic acid, nadic acid (endocys-bicyclo(2,2,1)hept-5-ene-2,3-dicarboxylic acid), Examples include unsaturated carboxylic acids such as citraconic anhydride and nadic anhydride, and derivatives of these acid anhydrides.

The unsaturated carboxylic acid-containing cyclic olefin copolymer [C] constituting the resin composition of the present invention is composed of an ethylene component and a cyclic olefin component constituting the cyclic olefin random copolymer (B) and the unsaturated carboxylic acid. or a random copolymer with its derivative component, or a copolymer obtained by graft-polymerizing the above unsaturated carboxylic acid or its derivative component onto the cyclic olefin random copolymer (B) by a known method.

Furthermore, the unsaturated carboxylic acid-containing cyclic olefin copolymer [C] may contain a carbon number of 3 to 20 similar to those exemplified for the cyclic olefin random copolymer [B] within the range that does not impair the purpose of the present invention. α-olefin may be copolymerized.

In the unsaturated carboxylic acid-containing cyclic olefin copolymer [C] constituting the resin composition of the present invention, the ethylene component (a') is 40 to 90 mol%, preferably 50 to 80 mol%.
The cyclic olefin component (b') is 10 to 60 mol%, preferably 20 to 50 mol%, and the unsaturated carboxylic acid or its derivative component (c) is 0.05 to 10 mol%, preferably 0.1 A range of 5 mol % is suitable.

In the unsaturated carboxylic acid-containing cyclic olefin copolymer [C] constituting the resin composition of the present invention, the intrinsic viscosity [η] determined by a+++ in decalin at 135°C is 0.05 to
1 Odl/g, preferably in the range of 0.08 to 5 dΩ/g, and the content of carboxyl groups or derivatives thereof is 0.0
A range of 5 to 10 mol%, preferably 0.1 to 5 mol% is preferred.

When the unsaturated carboxylic acid-containing cyclic olefin copolymer [C] constituting the resin composition of the present invention is a random copolymer of an ethylene component, a cyclic olefin component, and an unsaturated carboxylic acid or a derivative component thereof, for example, It can be produced according to the method for producing the cyclic olefin random copolymer [B].

In addition, in the case of a cyclic olefin-based random copolymer [[1] in which an unsaturated carboxylic acid or its derivative component is graft-polymerized, for example, an unsaturated carboxylic acid or its derivative component is used as a graft monomer, and a cyclic olefin-based random copolymer is used. Method 1 of melting the random copolymer (B) and adding a graft monomer to carry out graft copolymerization, or method 1 of melting the random copolymer (B) and carrying out graft copolymerization by adding a graft monomer to the cyclic olefin random copolymer ( It can be produced by a method such as adding a graft monomer dissolved in a solvent to BE, mixing thoroughly, and copolymerizing as shown in Graph 1. When carrying out such copolymerization as shown in Graph 1, the temperature is usually 60 to 350°C. In order to efficiently graft copolymerize the graft monomer, the reaction is preferably carried out in the presence of a radical initiator. Examples of radical initiators include organic peroxides, organic bersesters, and other azo compounds such as dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3,2,5-dimethyl-2,5
-di(tert-butylperoxy)hexane, 1.4
Dialkyl oxides such as -bis(tert-butylperoxyisopropyl)benzene are preferred.

In the polyamide resin composition of the present invention, (the superposition ratio of the polyamide resin as the A'1 component and the cyclic olefin random copolymer as the (B) component is 98/2 of the (A) component/[B] acid component) ~2798, preferably 9515~5/95
The total i of the [A] component polyamide resin and [B] acid component cyclic olefin random copolymer is 100
It is preferable to add 1 to 100 parts by weight, preferably 2 to 80 parts by weight, of the unsaturated carboxylic acid-containing cyclic olefin copolymer as component [C] based on the weight parts.

The resin composition of the present invention comprises the above (A), [[l] and [
C] In addition to component, heat-resistant stabilizers, weather-resistant stabilizers, antistatic agents, slip agents, anti-blocking agents, antifogging agents, lubricants,
A nucleating agent, a dye, a pigment, a natural oil and a synthetic acid oil, a wax, a rubber component for improving impact strength, and the like can be blended, and the blending ratio thereof is an appropriate amount. For example, as a stabilizer that may be added as an optional component, specifically, tetrakis[methylene-3(3,5-di-t-butyl-4-
hydroxyphenyl) propionate] methane, β-(
3,5-di-t-butyl-4-hydroxyphenyl)propionic acid alkyl ester, 2,2'-oxami-1-bis[ethyl-3(3,5-di-t-butyl-4-hydroxyphenyl)propionate] Phenolic antioxidants such as zinc stearate, calcium stearate, fatty acid metal salts such as calcium 12-hydroxystearate, glycerin monostearate, glycerin monolaure 1-, glycerin distearate, pentaerythritol monostearate 1- , polyhydric alcohol fatty acid esters such as pentaerythritol distearate and pentaerythritol tristearate. These may be blended alone or in combination; for example, tetrakis[methylene-3
(3,5-di-t-butyl-4-hydroxyphenyl)
Examples include a combination of propione-1-]methane, zinc stearate, and glycerin monostearate 1-.

Furthermore, the resin composition of the present invention includes silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice particles, pumice balloons, aluminum hydroxide, magnesium hydroxide, basic Magnesium carbonate, Dolomay! -1 Calcium sulfate, potassium titanate,
Barium sulfate, calcium sulfite, talc, clay, mica, asbestos, glass fiber, glass flakes, glass beads, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide, boron fiber, silicon carbide fiber, polyethylene fiber, polypropylene Fillers and reinforcing agents such as fibers, polyester fibers, and polyamide fibers may also be blended.

As a method for manufacturing the polyamide resin composition according to the present invention, a known method can be applied. A method of mechanically blending the combination [C] and other components added as necessary using an extruder, kneader, etc., or dissolving each component in a suitable good solvent, or dissolving each component separately and then mixing. However, examples include a method of removing the solvent, and a method of combining these two methods.

The polyamide resin composition obtained as described above has a polyamide resin (A) containing a cyclic olefin random compound which has better chemical resistance than polyamide resins, has a lower water absorption rate, is substantially ungradeable, and has a small mold shrinkage rate. Since the polymer (El) is blended, while maintaining the various properties of polyamide resin,
A polyamide resin composition having excellent heat resistance and chemical resistance, and low water absorption and molding shrinkage is obtained. Here, when only the polyamide resin (A) and the cyclic olefin random copolymer [B] are blended, the compatibility between the two is poor.
1IJ7 mechanical strength such as impact strength is low, but by further blending the unsaturated carboxylic acid-containing cyclic olefin copolymer [C], the polyamide resin (A) component and the cyclic olefin copolymer can be combined without impairing the above properties. The compatibility of the random copolymer (B) component can be improved, thereby increasing the mechanical strength.

Due to the above characteristics, the polyamide resin composition of the present invention can be used not only for the purposes in which polyamide resins are used, but also for heat resistance,
It can be widely used in fields where chemical resistance, low water absorption and low mold shrinkage are required.

Examples of applications include injection molded products such as automobile interior parts (e.g. instrument panels, console boxes, column covers, etc.), automobile exterior parts (e.g. fenders, bonnets, trunks, etc.), office equipment, tools,
Examples include home appliance housings, etc., and 1 as a blow molded product.
Examples include bottles, sheets and films include cast films, biaxially stretched films, multilayer films, etc., and foams include extruded foams, injection foams, and the like.

〔Effect of the invention〕

As described above, according to the present invention, since the [A] acid component CB] component and the [C] component are blended, the heat resistance and chemical resistance are excellent, and the water absorption rate and molding shrinkage rate are low, and (A)
A polyamide resin composition having good compatibility between the components and component [B] and high mechanical strength such as impact strength can be obtained.

〔Example〕

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples. In addition,
The methods for measuring and evaluating various physical property values in the present invention are shown below.

(1) Melt flow index (MFRzso-: ) ASTM
Measurement was conducted at a temperature of 260° C. and a load of 2.16 kg according to 01238.

(2) Preparation of test piece The test piece was molded under the following molding conditions using an injection molding machine 15-35 manufactured by Toshiba Machine Corporation and a specified mold for the test piece.

After molding, the test piece was left at room temperature for 48 hours and then subjected to measurement.

Molding conditions Nijilinda temperature 250℃, mold temperature 60℃, injection pressure car secondary/secondary = 1000/800kg/c+J,
Injection speed (-order) 30 mm/sec, screw rotation speed 150 rρm.

Cycle ((injection and holding pressure)/cooling) = 7/15 sec.

(3) Bending test It was performed according to ASTM 0790.

Test piece shape: 5 x 1/2 x I/8t inch,
Distance between spans: 51 mm Test speed: 20 mm/min Test temperature: 23° C. (4) Tensile test Conducted according to ASTM D638.

Mold type for test piece■ Test speed: 50mm/min Test temperature: 23℃ (5) Heat distortion temperature (1+DT) It was performed according to ASTM 0648.

Test piece shape: 5xl/4xl/2 inches Load: 264ρ
5i (6) Softening temperature (TMA) Thermo Mechanical A manufactured by DuPont
Illl was determined based on the thermal deformation behavior of a sheet with a thickness of 1 mm using a nalyzer. That is, a quartz needle was placed on the sheet, a load of 49 g was applied, the temperature was raised at a rate of 5°C/min, and the temperature at which the needle penetrated 0.635 mm was determined as TM.
I gave it an A.

(7) Rockwell hardness Measured at 23°C according to ASTM D785.

(8) Pencil hardness It was measured at 23°C according to JIS K 5400.

(9) Water absorption rate The value after 24 hours was measured according to JIS K 7209 A method.

(10) Izotsu impact test Conformed to ASTM D256.

Test piece shape: 5/2 x 1/8 x 1/2 inch (notched) Test temperature = 23°C (11) Compatibility Judgment was made based on the appearance of the injection molded bending test piece and the condition of the fractured surface.

O: Both appearance and fracture surface were uniform.

Δ: The appearance was slightly uneven in flow, and the fracture surface was slightly non-uniform.

There was an X Niskin layer, and the fracture surface was peeled off in layers.

Example 1 Unsaturated carboxylic acid-containing cyclic olefin copolymer [C]
The maleic anhydride-modified resin was prepared by the following method.

Ethylene content i62mol1% measured by 13C-NMR,
MFRz6oy-35g/10mln, intrinsic viscosity measured in decalin at 135°C [η) 0.47dlll/g
, TMA 148℃ ethylene and 1,4,5.8-dimethano-1,2,3,4,4a,5,8,8a-off) pellet 5kG was dissolved in 25g of acetone. 50 g of maleic anhydride, organic peroxide (manufactured by NOF Corporation, Perhexine 25B, trademark) 3
After adding g and mixing thoroughly, use a twin screw extruder (Ikegai Tekko Co., Ltd.)
The mixture was melted and unreacted at a cylinder temperature of 250° C. using PCM 45), manufactured by Kogyo Co., Ltd., and pelletized using a pelletizer. The maleic anhydride content of the resulting resin was 0.8% by weight.

Next, as component (A), polyamide resin (manufactured by Toshiku Co., Ltd.),
6 nylon CM1017, trademark) pellet 2.0kg
, [B] Ethylene content 162 mol%, determined by 13C-NMR as acid component, MFRzsoJ5g/10
m1n, intrinsic viscosity measured in decalin at 135°C [
η) 0.47 S/g, TMA 148°C pellets of random copolymer of ethylene and DMON, 6 kg
, and 0.4 kg of maleic anhydride-modified resin pellets prepared by the above method as the acid component [C] were thoroughly mixed, and then the cylinder temperature was increased to 25 cm using a twin-screw extruder (same as above).
The mixture was melt-blended at 0°C and pelletized using a pelletizer.

A test piece was prepared using the obtained pellet according to the method described above, and its physical properties were evaluated. The results are shown in Table 5.

Example 2.3 The same operation as in Example 1 was carried out except that the blending amounts of component (A), component [8] and component [C] were changed. Table 5 shows the results.
Shown below.

Examples 4 to 6 Instead of the polyamide resin used as component (A) in Examples 1 to 3, 6,6-nylon 3001N (manufactured by Toshiku Co., Ltd., trademark) was used to make cylinders for extruder and injection molding machines. The same operation was performed except that the temperature was 290°C. The results are shown in Table 5.

Comparative Example 1.2 6 Nylon CM used as component (A) in Examples 1 to 6
1017 (Comparative Example 1), or 6,6 nylon 3001
Molding was performed in the same manner as in Example 1 using only N (Comparative Example 2), and the physical properties were evaluated. The results are shown in Table 5.

Example 7 The [C] acid component used in Example 1 was replaced with ethylene content of 85 mol%, DMON content of 6 mol%, and intrinsic viscosity of [ηH
, Od (1/g) prepared by the same method as in Example 1 using 5 kg of ethylene-propylene-DMON copolymer, except that a maleic anhydride-containing If O, 7% maleic anhydride-modified resin was used. It was carried out in the same manner as in Example 1. The results are shown in Table 5.

Comparative example 3 Component [A] 2k in Example 1 except that the acid component [C] was removed.

and (A similar operation was performed except that a polyamide resin composition containing 2 kg of BE component was used. The results are shown in Table 5.

Example 8 Ethylene/DMON was used in place of the [B] component used in Example J.
Random copolymer (ethylene content 62 mol%, MFRz
Ga-c 35g/10mln, Intrinsic viscosity measured in decalin at 135°C [η) 0.47 dl/g) 80 ethylene-propylene random copolymer (ethylene content 80 mol%, glass transition temperature -54) °C, MFR
zs++e O, 7g/10m1n, intrinsic viscosity [η] 2.2 dl/g measured in decalin at 135°C) 20 parts by weight was added to a twin screw extruder (manufactured by Ikegai Tekko Co., Ltd., PCM 45).
The same operation as in Example 1 was carried out except that the resin melt-blended by the above method was used as the component (B).

The results are shown in Table 5.

From the above results, CA'J component, (B) component and [C]
The polyamide resin composition of the present invention containing the components (A
It can be seen that the heat deformation temperature is higher and the water absorption rate is lower than that of the conventional polyamide resin, which is the component ().

Furthermore, it can be seen that the compatibility is better and the Izot impact strength is higher than the polyamide resin composition excluding the [C] component.

Claims (1)

[Claims] (1) [A] polyamide resin, [B] ethylene component and the following general formula [I] or [
II], consisting of a cyclic olefin component represented by 135
Intrinsic viscosity [η] measured in decalin at ℃ is 0.05~
10 dl/g, a cyclic olefin random copolymer having a softening temperature (TMA) of 70°C or higher, and [C] an ethylene component, a cyclic olefin component represented by the following general formula [I] or [II], and unsaturated Consisting of a carboxylic acid or its derivative component, the intrinsic viscosity [η] measured in decalin at 135°C is 0.05 to 10 dl/g, and the content of carboxyl group or its derivative group is 0.05 to 10
mol% of an unsaturated carboxylic acid-containing cyclic olefin copolymer, and the weight ratio of component [A]/component [B] is 98/2 to 2/98.
, a polyamide resin composition containing 1 to 100 parts by weight of component [C] based on 100 parts by weight of the total amount of components [A] and [B]. General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [In the formula, n and m are both 0 or a positive integer, l is an integer of 3 or more, and R^1 or R^1^0
each represents a hydrogen atom, a halogen atom, or a hydrocarbon group. ]