JPS5978256A - Polyamide composition and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled compsn. which has excellent rigidity, heat retaining properties and impact resistance and little suffers changes in dimension and lowering in rigidity and salt water resistance due to water absorption, by preliminarily melt-mixing specified polymers and blending the mixture with a polyamide resin. CONSTITUTION:The titled compsn. is obtd. from 98-50pts.wt. polyamide (A), 1- 40pts.wt. modified ethylene/alpha-olefin copolymer (B) having an MFR of 0.01-50 obtd. by graft-polymerizing 0.01-5pts.wt. graft monomer such as an unsaturated dicarboxylic acid or its derivative onto 100pts.wt. ethylene/alpha-olefin copolymer contg. 60-7mol% of a 3C or higher alpha-olefin and 1-40pts.wt. ethylene polymer or ethylene copolymer (C) having an MFR of 0.005-50 obtd. by copolymerizing less than 15mol% of a 3C or higher alpha-olefin in such a proportion that the combined quantity of components A, B and C accounts for 100pts.wt. and B/C is 20-0.05 by weight.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyamide resin composition having excellent rigidity, impact resistance, and water absorption resistance, and a method for producing the same.

Polyamide resin is expected to be in great demand as an engineering plastic due to its excellent physical properties.

However, low-temperature impact resistance was not sufficient, and improvements were desired. As a method for improving this impact resistance, for example, JP-A No. 55-9661 and JP-A No. 55-966
No. 2 is proposed. That is, the proposal teaches that blending an ethylene-α-olefin copolymer grafted with an α,β-unsaturated carboxylic acid with a polyamide resin improves the Izot impact strength of the polyamide resin. . However, in the system of the above-mentioned composition, improving the Izod impact strength brings about a new drawback in that the rigidity is greatly reduced. Furthermore, there is also the problem that the impact strength against falling iron at low temperatures is insufficient, and the low-temperature impact strength of actual molded products is insufficient.

The present inventors have discovered that polyamide resin has little decrease in rigidity and can be used at low temperatures in actual molded products. In order to satisfy the fj impact strength, we have conducted repeated research to improve the impact strength at low temperatures, such as the impact strength from falling jolts and the impact strength at low temperatures. By combining and blending the polymers specified in the present invention, we have been able to improve the rigidity and low-temperature impact resistance ( Drop impact strength,
It has been found that a composition can be obtained which has an excellent Izot impact strength) and which exhibits little decrease in salt water resistance strength, rigidity, and dimensional change due to water absorption. Furthermore, the present inventors have discovered that a composition of even better quality can be obtained by preliminarily melt-mixing these specific polymers and then blending them into a polyamide resin.

That is, the gist of the present invention is that the polyamide (A) is 98 to so ffi parts, the modified ethylene-〇-olefin copolymer (B) is 1 to 40 parts by weight, and the ethylene polymer (0) is 1 to 40 parts by weight. (The above six components make up 100 parts by weight), and CB)/(C) (weight ratio)
= 20 to 0.05, and the above (B) is an ethylene-α- copolymerized with an α-olefin having 6 or more carbon atoms in a proportion of 60 to 7 mol%.
100 parts by weight of the olefin copolymer was added with 0 graft monomer selected from unsaturated dicarboxylic acids or derivatives thereof.
．． A modified ethylene-α-olefin copolymer obtained by graft polymerization of 0.01 to 5 parts by weight and having a melt flow route (MFR (2306C)) of 0.01 to 50, wherein (Cj) is an ethylene homopolymer. Union or carbon number 3
An ethylene polymer having a melt flow rate (+arp, (190°C)) of 0.005 to 50, selected from ethylene copolymers in which the above α-olefins are copolymerized in a proportion of less than 15 mol%. The present invention relates to a polyamide composition characterized by the following.

The present invention also provides a preferred method for producing the above composition, in which the modified ethylene-α-olefin copolymer (B) is mixed with 1 to 40 parts by weight of the ethylene polymer (0).
In the proportion of parts by weight, potash (BJ/(a) (weight ratio) = 20
0.05 and 98 to 50 parts by weight of polyamide (A) (the above three components amount to 100 parts by weight) are melt-mixed. This is a method for producing a polyamide composition.

The polyamide (A)G used in the present invention is well known in the art. These are of sufficient molecular weight to produce molded articles. Polyamides can be produced by condensing equimolar amounts of saturated organic dicarboxylic acids containing 4 to 12 carbon atoms with organic diamines containing 2 to 13 carbon atoms.

Here, if desired, diamines can be used such that there is an excess of amine end groups over carboxyl end groups in the polyamide. Conversely, dicarboxylic acids can also be used in such a way that there is an excess of acid groups. These polyamides can equally well be prepared from said amines and acid-forming derivatives and amine-forming derivatives, such as esters, acid chlorides, amine salts, etc. Typical dicarboxylic acids used to make polyamides include adipic acid, pimelic acid, superric acid, sebacic acid and dodecandioic acid. On the other hand, typical diamines include hexamethylene diamine and octamethylene diamine. Furthermore, polyamides can also be produced by self-condensation of lactams. Examples of polyamides include polyhexamethylene adipamide (6,6 nylon), polyhexamethylene adipamide (6,9 nylon), polyhexamethylene adipamide (6,10 nylon) and polyhexamethylene dodecamide. Noamide (6,12 nylon)
, polybis(4-aminocyclohexyl)methandodecanoamide, or polyamides prepared by ring opening of lactams, ie polyprolactam (nylon 6), polylauric lactam or poly-11-aminoundecanoic acid. It is also possible to use polyamides produced by polymerization of at least two amines or acids used to produce the polyamides mentioned above, for example polymers made from adipic acid and isophthalic acid and hexamethylene diamine. be. Blends of polyamides such as nylon 6.6 and mixtures of nylon 6 are also included. The condensation polyamide used in the present invention is preferably polyhexamethylene adipamide (6
, 6 nylon) or polyhexamethylene adipamide (
6,6 nylon) and polyprolactum (6,6 nylon).

The modified ethylene-a-olefin copolymer (B) used in the present invention is a modified ethylene obtained by graft copolymerizing an ethylene-α-olefin copolymer with a specific amount of a graft monomer selected from unsaturated dicarboxylic acids or derivatives thereof. −
It is an α-olefin copolymer. The ethylene-α-olefin copolymer to be subjected to graft modification needs to have an ethylene content in the range of 40 to 93 mol%, and more preferably in the range of 60 to 85 mol%. Even if the ethylene content of the ethylene-〇-olefin copolymer becomes higher than 96 mol% or lower than 40 mol%, the ethylene-α-olefin copolymer becomes highly crystalline, and the copolymer becomes highly crystalline. Even if the graft modified product is combined with (0) described later and blended into polyamide,
It cannot be said that the effect of improving the impact resistance of the composition is sufficient. In addition, the melt flow rate of the ethylene-α-olefin copolymer at 250°C (MFR, load 2160 g
Values measured at 230°C (ASTM D 1238K
method)] is preferably in the range of 0.1 to 50 g/10 minutes, particularly 0.5 to i0 g/10
It is particularly preferable that the range is in the range of minutes. The ethylene-α
- Olefin copolymer glue, 4 FR 0-1 g/
The graft-modified ethylene-
The difference in melt viscosity between the α-olefin co-N coalescence and the polyamide tends to increase, and the dispersion effect of the graft modified product into the polyamide is not necessarily sufficient.
), the effect of improving impact resistance tends to decrease. Further, the density of the ethylene-α-olefin copolymer is preferably in the range of 0-90 g/alt3 or less, more preferably 0.86 to 0.89 g.
/(7)6. Furthermore, it is preferable that the ethylene-α-olefin copolymer has low crystallinity or poor quality, and its crystallinity is usually in the range of 0 to 50%, preferably in the range of 0 to 30%. .

The α-olefin component unit constituting the ethylene-olefin copolymer is an α-olefin having 6 or more carbon atoms, particularly about 6 to 18 carbon atoms, propylene, 1
-butene, 1-hexene, 4-methyl-1-pentene,
All examples include 1-decene, and one or a mixture of two or more of these. The ethylene-α-olefin copolymer is usually a copolymer of an ethylene component and an α-olefin, but in some cases it may contain a trace amount, for example 0.
There is no problem even if the diene component is contained in a range of 5 mol% or less.

Examples of unsaturated dicarboxylic acids or derivatives thereof include maleic acid, tetrahydrophthalic acid, itaconic acid, citraconic acid/crotonic acid, isocrotonic acid, nadic acid (endocys-bicyclo(2,2,1)hept-5-ene-2,
6-dicarboxylic acid), or derivatives thereof, such as acid halides, amido-imides, anhydrides, esters, etc. Specifically, maleyl chloride, maleimide, maleic anhydride, citraconic anhydride\ Examples include monomethyl maleate, dimethyl maleate, and glycidyl maleate. Among these, anhydrides are preferred, and maleic anhydride/nadic anhydride is particularly preferred.

Graph of the graft monomer of the modified ethylene-α-olefin copolymer (B) used in the present invention parts by weight, and more preferably from 0.1 to 4 parts by weight. If the grafting ratio of the grafting monomer is less than 0.01 part by weight, the grafting monomer loses its compatibility with polyamide, causing delamination and reducing the effect of improving impact resistance. Furthermore, when the grafting ratio exceeds 5 parts by weight, the degree of crosslinking of the graft modified product increases, and polyamide (a
), the effect of improving impact resistance will be reduced. Furthermore, the melt flow rate (t, ipR, load 2z
160 g Measured at 1230°C] is usually 0.0
1 to 20 g/10 min, preferably 0.05 to 1
It is in the range of 0 g/10 minutes.

t-1 selected from unsaturated dicarboxylic acids or derivatives thereof,
In order to graft copolymerize the graft monomer to the ethylene-α-olefin copolymer, various conventionally known methods can be employed. For example, there is a method in which an ethylene-α-olefin copolymer is melted or dissolved in a solvent, and a graft monomer is added to carry out graft polymerization.

During graft polymerization, other vinyl monomers such as styrene may also be present. In particular, modified ethylene-α-olefin polymers obtained by efficiently performing graft polymerization using a radical generator are suitable for this purpose because they are less prone to decomposition due to oxidation of the raw material ethylene-α-olefin copolymer. It is.

Examples of radical generators include organic peroxides and organic peresters, such as benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, and dite.
rt-butyl peroxide, 2,5-dimethyl-2,5
-di(peroxide benzoate) hexin-311,
4-bis(tert-butylperoxoisopropyl)
Benzene, lauroyl peroxide, tert-butyl peracetate, 2,5-dimethyl-2,5-di(te
rt-butylperoxy)hexane-ro, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, tert-butylperbenzony), tert-
butylperphenylacetate), tert-butylperisobutyrate, tert-butylperuSθC-octoate, ter-butylpervivalate, cumylperpivalate and tert-butylperdiethyl acetate, and other azo compounds such as azobis There are isobutyronitrile and dimethyl azoisobutyrate. Among these, dicumyl peroxide, di-tert-butylberuroxide, 2,5-dimethyl-2,5-di(te
Dialkyl peroxides such as rt-butylperoxy)hexyne-6,2,5-dimethyl-2,5-di(tert-butylperoxy)hexadi and 1,4-bis(tert-butylperoxyisoprobyl)benzene are preferred.

Further, the ethylene polymer (0) used in combination in the present invention is an ethylene homopolymer or an α-olefin having 6 or more carbon atoms, preferably 1 to 18 carbon atoms, less than 15 mol %, especially 0.
They are selected from ethylene copolymers copolymerized in a proportion of 1 to 15 mol%, and their melt flow rate (MFR (190°C)) is about 0.005 to about 50, particularly preferably about It ranges from 0.01 to about 20. More specifically, these polymers have a density of about 0.98 to about 0.91 g 10; I3 medium-low pressure polyethylene, a density of about 0.93 to about 0.9087 cm
3 high-pressure polyethylene, 1-butene, 6-methyl-
Less than about 15 mol % of a-olefins such as 1-butene, 1-pentene, 4-methyl-1-pentene, especially about 0.1
Density of about 0.9 copolymerized in a proportion of from about 15 mol%
6 to about 0.91 g/C)) L' of ethylene polymers are mentioned as preferred examples.

Among these ethylene polymers H, the density is about 0.98 to about 0.92, especially about 0.97 to about 0.94, and the crystallinity is about 90 to about 50%, especially about 85 to about 0.94. low-pressure polyethylene of about 65%, and a density of about 0.97 to about 0.93 g/C1n3, and a crystallinity of about 85 to about 60%, especially about 80 to about 65%, of α-olefins. The ratio is about 0.1
from about 15 mol%, especially from about 0.5 to about 5 mol%
Ethylene-α-olefin copolymers are preferred.

The composition of the present invention comprises the above components (A), (B) and (0), each having a ratio of (A)/(B)/(C) of about 98 to about 50/about 1 to about 4.
0/about 1 to about 40 (unit weight part, the above six components make up 100 parts), and (B)/(C) (weight ratio) - about 20 to about 0.05. It is a composition formulated with (A)/(13)/(C) about 96 to about 60/about 6 to about 30/about 6 to about 30 (unit weight parts, the above 6 components). 100
parts by weight), and (B)/(C) - about 10
The composition is formulated in a range of about 0.1 to about 0.1.

If the ratio of each component does not satisfy the above conditions, the effect of improving impact properties will be insufficient. In particular, it is undesirable if a large amount of the components (BJ and (C)) is blended, as this will impair the excellent rigidity of the polyamide.

Optionally, the compositions of the invention may contain one or more other additives, such as additives that may be used in each component (A), (B), (a), such as phenolic or amine antioxidants. , UV absorbers and photoprotectants, phosphite stabilizers, peroxide decomposers, polyamide stabilizers, basic co-stabilizers, polyvinyl chloride stabilizers, nucleating agents, plasticizers, lubricants, emulsifiers, antistatic may include additives, flame protectants, pigments, carbon black, asbestos, glass fibers, kaolin and talc. Therefore, the present invention includes multi-component compositions that together contain one or more additives.

Examples of suitable additives mentioned above are selected from the following group: In particular, the compositions of the present invention blended with the antioxidants exemplified below, as well as the antioxidants and UV absorbers exemplified below, provide very effective stability.

Examples of these additives include compounds described in Japanese Patent Publication No. 56-34036, and examples of antioxidants include 2,6
- dialkylphenols, e.g. 2,6-ditertiarybutyl-4-methylphenol, alkylated hydroquinone derivatives, e.g. 2,5-ditertiarybutyl-hydroquinone, hydroxylated thiodiphenyl ethers, e.g. 2,2-thiobis-(6- Tert-butyl-4-
methylphenol), alkylidene-bisphenol,
For example, 2,2'-methylene-bis(6-tert-butyl-4-methylphenol), 0-3N- and S-
Benzyl compounds, e.g. 3, 5, 3', 5'
-tetratert-butyl-4,4'-dihydroxybenzyl ether, 4-hydroxy-6,5-dimethylbenzyl-mercaptoacetic acid octadecyl ester, hydroxybenzylated malonic acid ester, e.g. di-tert-butyl-2-hydroxybenzyl)-malonic acid dioctadecyl ester, 2-(tert-butyl-4-hydroxy-5-methylbenzyl)-malonic acid dioctadecyl ester, hydroxybenzyl-aromatic [hydrogen 1 For example, 1.3.5-tri(6
,5-ditertibutyl-4-hydroxybenzyl)
-2,4゜6-)limethylbenzene, S-triazine compounds, e.g. 2,4-bisoctylmercapt.=
6-(3,5-ditertibutyl-4-hydroxyanilino)-S-triazine 1. Amides of 5-di-tert-7-ethyl-4-hydroxyphenyl-propionic acid, such as 1,3,5-tri(3,5-di-tert-butyl-4-hydroxyphenyl-propionyl)-
Hexahydro-8-triazine 1.3.5-ditertiarybutyl-4-hydroxyphenyl-propionic acid and 1
Esters with hydrohydric or polyhydric alcohols, such as methanol, ethanol, octadecanol, 11.6-hexane-diol, 1.9
-nonanediol, ethylene glycol, 1,2-propane-diol, diethylene glycol, thiodiethylene glycol, neopentyl glycol, pentaerythritol, trimethylolpropane, 5-tert-butyl-4-hydroxy-3-methylphecolbropionic acid and monovalent or esters with polyhydric alcohols, e.g.
Methanol, ethanol, octadecanol, 1.6-
Hexanediol, 1.9-7nanediol, ethylene glycol, 1.2-propanediol, diethylene glycol, thiodiethylene glycol, neopentyl glycol, pentaerythritol, trimethylolpropane, 3.5-dibutyl-4-hydroxyphenylacetic acid and 1 esters with monohydric or polyhydric alcohols,
For example, such alcohols include methanol,
Ethanol, octadecanol, 1.6-hexanediol, 1.9-nonanediol, ethylene glycol,
1.2-Propanediol, diethylene glycol, thiodiethylene glycol, neopentyl glycol 1 pentaerythritol, trimethylolpropane 1, aminoaryl derivatives, e.g. Eva, phenyl-1-naphthylamine, phenyl-2-naphthylamine, UV absorbers and photoprotectants as 2-(2-hydroxyphenyl)
- derivative of benztriazole, 2,4-bis(2'-
Derivatives of (hydroxyphenyl)-6-alkyl-8-triazines, 2-hydroxy-benzophenone derivatives, 1
．． 5-bis(2'-hydroxy-benzoyl)-benzene, esters of substituted benzoic acids, e.g. phenyl salicylates, acrylates, e.g. α-cyano-β, p-diphenyl acrylic acid ethyl ester or inoctyl ester, nickel compounds, e.g. , 2.2'-Thiobis-(4-tertiaryoctylphenol) and nickel complexes 1:1 and 1:2, nickel dibutyldithiocarbamate, 2-hydroxy-4-methyl-phenyl-undecyl-ketone oxime oxanilide, metal deactivators such as oxanilide, phosphites such as triphenylphosphite, 2-mercaptobenzimidazole, etc. salts such as zinc salts, diphenylthiourea, polyamide stabilizers such as copper salts combined with iodine and/or phosphorus compounds, basic costabilizers such as polyvinylpyrrolidone, polyurethane, etc. and alkali metal salts and alkaline earth metal salts of higher saturated or unsaturated fatty acids, such as calcium stearate, Pv
Examples of C stabilizers include organotin compounds, barium or cadmium salts of fatty acids, and examples of nucleating agents include:
Examples include 4-tert-butylbenzoic acid.

The amounts of these additives in the compositions of the invention can vary within wide limits.

In the present invention, it is desirable to use an antioxidant, particularly a phenolic antioxidant, and the amount thereof is preferably about 0.01 to about 6% by weight based on the total composition.

The compositions of the present invention are prepared by melt mixing in a variety of ways. For example, after premixing any two components, they may be mixed with the remaining other components, or three components may be mixed at the same time. Further, additional amounts of additives such as antioxidants may be added at any of these stages as necessary.

The composition of the present invention is excellent in various properties such as rigidity, impact resistance, and water absorption resistance, but in particular, when producing the composition, a preliminarily prepared mixture of components (B) and (0) is preliminarily melted and mixed. A composition produced by melt-mixing the mixture and polyamide (shu component) has particularly excellent performance.

More preferably, when preparing the above-mentioned premix, it is desirable to newly add an antioxidant. The newly added antioxidant is particularly preferably a phenolic antioxidant, with an amount of about 0.01 to about 6 parts, particularly about 0.02 to about 0.00 parts by weight, based on 100 parts by weight of the preliminary composition. The amount is preferably 5 parts by weight.

The composition of the present invention maintains high rigidity and has improved properties such as low-temperature impact resistance, moisture absorption resistance, and salt water resistance strength.

The composition of the present invention can be molded into various shapes by various conventionally known melt molding methods. Examples include methods such as injection molding, extrusion molding, compression molding, and foam molding, and are used in a wide range of applications including automobile parts, electrical appliances, and electrical parts.

Examples 1 to 4, Comparative Example 4 Nylon 6 (Toshi Co., Ltd., CM-1021XF).

MFR3,74g/10m1n Q conditions), ethylene-propylene copolymer [ethylene content 80 mol%, M
FRo, 80 g/10 min, density 0.87g
10n5, crystallinity 15%] maleic anhydride graft-modified ethylene-propylene co-TL composite (Mg
R230°CO0 filter 8g/10mln, crystallinity 14
%] and polyethylene (MFR190℃0.78 g
/ 10 min, density 0.954g / (ml”
) in a blender at the ratio shown in Table 1,
A triblend product was prepared. This tri-blend composition was supplied to a L/D 28.25 mmφ-screw extruder, and
The mixture was kneaded and granulated by passing once at 0°C at 50 rpm.

After drying the granulated pellet sample at 100°C for 24 hours,
Physical property test pieces were prepared using a Toshiba X5-50 injection molding machine under the following conditions.

Cylinder temperature 260'C Injection pressure 650k (j/an2 injection time
10 sec Mold temperature 80°C Subsequently, physical properties were evaluated by the following method.

MFR measurement; IA under ASTM D-1258-79% conditions
PR was measured.

Bending test; using a 1/8" thick test piece, ASTM D
-790-80, bending elastic modulus F M (kg10n
2) The bending yield strength Fs (kg/cm2) was measured. The test pieces were conditioned in a constant temperature and humidity room at 23° C. and 150% RH for 3 days.

Drop impact strength: 9 [] tj on a test piece (diameter 50 mmφ, thickness 1.2 mm) placed horizontally at -40°C
A plow of a certain shape was dropped from a height of 1 1, and the weight of the plow was varied, and the impact strength of the plow was evaluated based on the weight (g) of the plow required to destroy 50% of a fixed number of test specimens. . The test pieces were conditioned in a constant temperature and humidity room at 23° C. and 150% RH for 5 days.

Izotsu impact strength: using a 1/8" thick test piece・A
-40°C notched isot impact strength was measured using STM D256. Conditioning of the test piece was at 23°C1
The test was carried out for 5 days in a constant temperature and humidity room at 50% RH.

Water absorption test i According to ASTM D570, a test piece (diameter 2 □ (inch, thickness 1/8 inch)) was dried at 100°C for 24 hours and then subjected to a water absorption test in 50°C water for 48 hours, and the weight change rate of the test piece was determined. The water absorption rate) was calculated from

The results are shown in Table 1.

Examples 5 to 7 The same procedure as in Example 1 was conducted except that the modified sethylene-a-olefin copolymers shown in Table 1 were used.

Examples 8 to 10 The same procedure as in Example 1 was conducted except that the polymer shown in Table 1 was used as the ethylene polymer.

Example 11 The modified ethylene-ff-olefin copolymer used in Example 8 and the ethylene polymer were premixed using the extruder of Example 8, and then the premix and nylon 6 were mixed using the extruder of Example 8. The same procedure as in Example 8 was conducted except that the mixture was kneaded and mixed using an extruder.

Comparative Example 2.3 The same procedure as in Example 1 was conducted except that the nylon 6 and maleic anhydride graft-modified ethylene-propylene copolymer used in Example 1 were mixed in the proportions shown in Table 1.

Example 12 When preparing a premix from the modified ethylene-propylene copolymer and ethylene polymer used in Example 8, pentaerythritol-tetra(3-
0.05% by weight of (5-ditert-butyl-4-hydroxyphenyl)propionate (Irganox 1010) and
- 0.1% by weight of methylphenol is newly added,
The procedure of Example 1 was repeated except that the extruder of Example 8 was used to prepare the premix.

Mr. Kazuo Wakasugi, Commissioner of the Patent Office, July 1982, Ministry of Procedure and Amendments, Indication of the Case, Patent Application No. 187501, filed in 1987, Name of the Invention, Polyamide Composition and Process for Producing the Same, 3, Person Making the Amendment Related Patent Applicant (58B) Mitsui Petrochemical Industries Co., Ltd. Representative Seiki Nakano 4, Agent 3-2-5-7 Kasumigaseki, Chiyoda-ku, Tokyo 100 Table 1 on page 29 of the amendment details (Continued) The data in the section "Raw material/ethylene-α-olefin copolymer" in Example 7 is corrected as follows.

Claims (2)

[Claims] (1) 98 to 50 parts by weight of boryamide (A),
A modified ethylene-α-olefin copolymer (E, 1) in a proportion of 1 to 40 parts by weight and an ethylene polymer (0) in a proportion of 1 to 40 parts by weight (the above three components amount to 100 parts by weight), and ( B)/(Cri (weight ratio))=20~0.0
5, and the above CB) contains 60 to 7 mol% of a-olefin having 3 or more carbon atoms.
A graft monomer selected from unsaturated dicarboxylic acids or derivatives thereof is graft-polymerized to 100 parts by weight of an ethylene-α-olefin copolymer copolymerized in a ratio of 0.01 to 5 parts by weight. Melt 70-
) (MF:R(2RO''C)) is 0.01 to 5
0, wherein (0) is an ethylene copolymer obtained by copolymerizing an ethylene homopolymer or an α-olefin having 3 or more carbon atoms in a proportion of less than 15 mol%. The melt flow rate (MFR (190°C)) selected from the polymer is 0.005 to 50
A polyamide composition characterized in that it is an ethylene polymer. (2) Modified ethylene-α-olefin copolymer (E
) in a ratio of 1 to 40 parts by weight and ethylene polymer (0) in a ratio of 1 to 40 parts by weight, and (B)/(0) (weight ratio) = 20 to 0.05. A method for producing a composition, characterized in that the mixed premix and 98 to 50 parts by weight of polyamide (A) (the above 6 components make up 100 parts by weight) are melt-mixed, the method comprising (B) is copolymerized with 60 to 7 mol% of α-olefin having 5 or more carbon atoms.
100 parts by weight of the olefin copolymer was added with 0 graft monomer selected from unsaturated dicarboxylic acids or derivatives thereof.
．． A modified ethylene-α-olefin copolymer obtained by graft polymerization of 0.01 to 5 parts by weight and having a melt flow rate (Mi + rt (2'50°C)) of 0.01 to 50, wherein (0) is Melt flow rate (MFR (190°C)) selected from ethylene homopolymers or ethylene copolymers copolymerized with less than 15 mol% of α-olefin having 3 or more carbon atoms (MFR (190°C)) is 0.005 or more. 50
A method for producing a polyamide composition characterized in that it is an ethylene polymer.