JPH0632977A - Solvent-resistant container - Google Patents

Abstract

PURPOSE:To obtain a solvent-resistant container excellent in impact resistance, oil resistance, and mechanical strengths by molding a resin compsn. contg. a polyamide resin, a modified polyolefin resin, a modified olefinic elastomer, and an inorg. filler each in a specified amt. CONSTITUTION:A container is obtd. by molding a resin compsn. which comprises 100 pts.wt. compsn. consisting of 50-90wt.% polyamide resin (e.g. nylon 6), 2-40wt.% modified polyolefinic resin or polyolefinic resin compsn. contg. at least 1wt.% the modified polyolefinic resin (e.g. maleic anhydride-modified PP), and 2-40wt.% modified olefinic elastomer or olefinic elastomer compsn. contg. at least 1wt.% the modified olefinic elastomer (e.g. a maleic anhydride- modified ethylene-propylene copolymer rubber) and 3-80 pts.wt. inorg. filler (e.g. a glass fiber).

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent resistant container made of a polyamide resin composition, and more particularly to a solvent resistant container made of a polyamide resin composition excellent in solvent resistance, oil resistance, impact resistance and mechanical strength. It relates to a solvent-based container.

[0002]

BACKGROUND OF THE INVENTION Polyamide resins are excellent in mechanical strength, heat resistance, gas barrier properties and the like, and are therefore suitable for plastic containers replacing various metal containers and glass containers. In particular, it has attracted attention as a resin for industrial containers such as solvent containers and tool boxes.

However, the polyamide resin has a problem that it is inferior in water resistance, moldability and impact resistance. In particular, since it has poor impact resistance, it has a problem that it does not have sufficient strength as an industrial container that is expected to be used under severe conditions.

The above-mentioned insufficient properties are generally possessed by polyolefins. However, since the polyolefin resin is inferior in solvent resistance and oil resistance, there is a problem that swelling or cracking is easily caused by oil components such as engine oil. Therefore, with a polyamide resin layer,
A modified polyolefin layer and a container having a multilayer structure composed of a polyolefin layer are used, but if the adhesion between the layers is not sufficient, mechanical strength and impact resistance tend to decrease,
In addition, solvent resistance, oil resistance, water resistance and the like are likely to decrease due to defects in the multilayer structure. Further, since the processing process becomes complicated, there is a problem that the manufacturing cost becomes high.

Therefore, a single layer container made of a polyamide resin is desired, but there is a problem that the compatibility between polyamide and polyolefin is not good. Therefore, for the purpose of improving the compatibility between the polyamide and the polyolefin, it is possible to add a modified polyolefin such as an unsaturated carboxylic acid or an anhydride thereof,
There is a problem in that it is difficult to bring all of the mechanical strength, impact resistance, solvent resistance and oil resistance required for a solvent resistant container to good levels simply by adding a modified polyolefin.

Therefore, an object of the present invention is to provide a solvent resistant container made of a polyamide resin composition which is excellent in solvent resistance, oil resistance, impact resistance and mechanical strength.

[0007]

As a result of earnest research in view of the above object, the present inventors have prepared a polyamide resin, a modified polyolefin by a modifying monomer having a carboxyl group or an epoxy group, and a modified olefin elastomer. The resin component contained in a predetermined amount, a container obtained from a composition obtained by mixing a predetermined amount of an inorganic filler is excellent in solvent resistance, oil resistance, impact resistance, mechanical strength, etc. The present invention has been completed by finding that it is suitable as a sex container.

That is, the solvent resistant container of the present invention comprises: (a) 50 to 90% by weight of polyamide resin; (b) modified polyolefin; or 2 to 40% by weight of a polyolefin resin composition containing 1% by weight or more of the modified polyolefin. % And (c)
Modified olefin-based elastomer, or 2 to 40% by weight of an olefin-based elastomer composition containing 1% by weight or more of the modified olefin-based elastomer, and (a) +
It is characterized by comprising a composition containing (d) 3 to 80 parts by weight of an inorganic filler with respect to a total of 100 parts by weight of (b) + (c).

The present invention is described in detail below. The solvent resistant container of the present invention is basically (a) a polyamide resin, and (b)
The composition comprises a resin component containing a modified polyolefin and (c) a modified olefin elastomer, and (d) an inorganic filler. Each component will be described below.

(A) Polyamide Resin In the present invention, (a) the polyamide resin includes hexamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2,2,4- or 2,4,4, -trimethylhexamethylenediamine, Aliphatic, alicyclic or aromatic diamines such as 1,3- or 1,4-bis (aminomethyl) cyclohexane, bis (p-aminocyclohexylmethane), m- or p-xylylenediamine, and adipine A polyamide produced from an aliphatic, alicyclic or aromatic dicarboxylic acid such as an acid, suberic acid, sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid or isophthalic acid, 6
From polyamides prepared from aminocarboxylic acids such as aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, polyamides prepared from lactams such as ε-caprolactam, ω-dodecalactam, and components thereof And a mixture of these polyamides. Specific examples include nylon 6, nylon 66, nylon 610, nylon 9, nylon 6/66, nylon 66/610, nylon 6/11, nylon 6/12, nylon 12, nylon 46, and amorphous nylon. . Of these, nylon 6 and nylon 66 are preferable in terms of good rigidity and heat resistance.

The molecular weight of the above polyamide resin is not particularly limited, but those having a relative viscosity η _r (measured in JIS K6810, 98% sulfuric acid) of 0.5 or more are usually used, and those having a mechanical strength of 2.0 or more are particularly used. It is preferable because it is excellent.

(B) Modified Polyolefin (b) The modified polyolefin is a modified polyolefin with a monomer having a carboxyl group or an epoxy group.

In the modified polyolefin, the polyolefin to be modified is ethylene, propylene, butene-1, pentene-1, hexene-1, 4-methylpentene-1, etc. Examples thereof include a copolymer with propylene or another α-olefin, or a copolymer of two or more kinds of these α-olefins. Among these, polyethylene such as low density polyethylene, linear low density polyethylene, medium density polyethylene and high density polyethylene and polypropylene are preferable. Polypropylene is not limited to a homopolymer, and a random or block copolymer with another α-olefin containing a propylene component in an amount of 50 mol% or more, preferably 80 mol% or more can also be used. As the comonomer copolymerized with propylene, there are ethylene and other α-olefins, and ethylene is particularly preferable.

Melt index of the polyethylene
(MI, 190 ° C., 2.16 kg load) is preferably 0.1 to 100 g / 10 min, and particularly preferably 0.5 to 50 g / 10 min.

The melt flow rate of polypropylene (MFR, 230 ° C., 2.16 kg load) is preferably 0.1 to 100 g / 10 min, and particularly preferably 0.5 to 50 g / 10 min.

Examples of such a polyolefin-modifying monomer include a monomer containing a carboxyl group or an epoxy group.

The carboxylic group-containing monomer is preferably an unsaturated carboxylic acid or an anhydride thereof, for example, a monocarboxylic acid such as acrylic acid or methacrylic acid, maleic acid,
Dicarboxylic acids such as fumaric acid and itaconic acid, maleic anhydride, itaconic anhydride, endo-bicyclo- [2,2,1] -5
Examples thereof include dicarboxylic acid anhydrides such as -heptene-2,3-dicarboxylic acid anhydride (hymic anhydride), and dicarboxylic acid and its anhydride are particularly preferable.

Further, as the epoxy group-containing monomer,
For example, methacrylic acid glycidyl ester, acrylic acid glycidyl ester and the like can be mentioned.

Further, the following general formula (1):

[Chemical 1] (In the formula, R is H or an alkyl group having 1 to 6 carbon atoms,
Ar is an aromatic hydrocarbon group having 6 to 20 carbon atoms and having at least one glycidyloxy group, and n represents an integer of 1 to 4. A glycidyl compound having an acrylamide group and an epoxy group represented by the formula (4) can also be used as the modifying monomer.

Preferred glycidyl compounds include those represented by the following general formula (2).

[Chemical 2] (In the formula, R is H or an alkyl group having 1 to 6 carbon atoms.)

Such a glycidyl compound can be produced, for example, by the method disclosed in JP-A-60-130580.

The modified polyolefin with the modifying monomer may be a block copolymer, a graft copolymer, a random copolymer or an alternating copolymer.

It is preferable that the content of the modifying monomer in the modified polyolefin is in the range of 0.05 to 5% by weight, preferably 0.1 to 3% by weight. If the amount of modification by the modifying monomer is less than 0.05% by weight, the effect of improving the compatibility between the polyolefin and the polyamide resin is not sufficient, and if it exceeds 5% by weight, the mechanical strength decreases.

The modified polyolefin can be produced by either a solution method or a melt kneading method. In the case of the melt kneading method, the polyolefin, the modifying monomer and the catalyst are put into an extruder, a biaxial kneader or the like, and heated to a temperature of 150 to 250 ° C. to be kneaded while melting. In the case of the solution method, the above-mentioned starting materials are dissolved in an organic solvent such as xylene and stirred at a temperature of 60 to 140 ° C. In any case, a usual radical polymerization catalyst can be used as a catalyst, for example, benzoyl peroxide, lauroyl peroxide, ditert-butyl peroxide, acetyl peroxide, tert-butyl peroxybenzoic acid, dicumyl peroxide, Peroxybenzoic acid, peroxyacetic acid, tertiary butyl peroxypivalate, peroxides such as 2,5-dimethyl-2,5-ditertiary butyl peroxyhexyne and diazo compounds such as azobisisobutyronitrile Etc. are preferred. The amount of the catalyst added is about 1 to 100 parts by weight based on 100 parts by weight of the modifying monomer.

Regarding the melt viscosity of the modified polyolefin as described above, in the case of modified polypropylene, the melt flow rate (MFR, 230 ° C., 2.16 kg load) is preferably 0.1 to 500 g / 10 minutes, and in the case of modified polyethylene. , Melt index (MI, 190 ℃, 2.16kg load) 0.1 to 50g
/ 10 minutes is preferred.

In the present invention, a polyolefin resin composition obtained by diluting the above modified polyolefin with an unmodified polyolefin can also be used. As the unmodified polyolefin, the above-mentioned polyolefin to be modified can be used.

In the case of the polyolefin resin composition, the ratio of the modified polyolefin is 1% by weight or more, preferably 10% by weight or more, based on 100% by weight of the modified polyolefin and the unmodified polyolefin. When the content of the modified polyolefin is less than 1% by weight, there is no sufficient effect for improving the compatibility between the polyolefin resin composition (modified polyolefin + unmodified polyolefin) and the polyamide resin.

However, the modified polyolefin + unmodified polyolefin is 100% by weight, and the content of the modifying monomer is preferably 0.05% by weight or more, particularly 0.2 to 3% by weight. When the content of the modifying monomer is less than 0.05% by weight, there is no sufficient effect to improve the compatibility between the polyolefin resin and the polyamide resin, which is not preferable.

(C) Modified Olefin-based Elastomer (c) The modified olefin-based elastomer is obtained by modifying the olefin-based elastomer with a monomer having a carboxyl group or an epoxy group.

In the above modified olefin elastomer, the olefin elastomer to be modified is ethylene, propylene, 1-butene, 1-hexene, 4-
Examples thereof include a copolymer rubber of two or more kinds of α-olefins such as methyl-pentene, a copolymer rubber of an α-olefin and another kind of monomer, and the like. As the above-mentioned two or more copolymer rubbers of α-olefin, typically, ethylene-propylene copolymer rubber (EPR), ethylene-butene copolymer rubber (EBR), and ethylene-propylene- Diene copolymer rubber (EPDM) may be mentioned. As the diene in the ethylene-propylene-diene copolymer rubber (EPDM), a non-conjugated diene such as dicyclopentadiene, 1,4-hexadiene, cyclooctadiene, methylene norbornene or a conjugated diene such as butadiene or isoprene is used. be able to. Further, vinyl acetate, acrylic acid ester and the like can be used as the other monomer copolymerized with the α-olefin. A typical example of a copolymer of α-olefin and another monomer is ethylene-
Examples thereof include vinyl acetate copolymer (EVA).

Ethylene-propylene copolymer rubber (EPR)
Preferably has an ethylene content of 40 to 90 mol% and a propylene content of 10 to 60 mol%. A more preferable range is 50 to 90 mol% of ethylene and 10 to 10 of propylene.
It is 50 mol%.

The EPR melt index (190
C., 2.16 liter load) is preferably in the range of 0.5 to 15 g / 10 minutes, more preferably 3 to 9 g / 10 minutes.

The ethylene-butene copolymer rubber (EBR) is
The ethylene content is preferably 60 to 97 mol%, and the butene-1 content is preferably 3 to 40 mol%. A more preferred range is 80 to 95 mol% for ethylene and 5 to 20 mol% for butene-1.

Further, the EBR melt index (190
C., 2.16 liter load) is preferably in the range of 0.5 to 15 g / 10 minutes, more preferably 3 to 9 g / 10 minutes.

The ethylene-propylene-diene copolymer (EPDM) has an ethylene content of 40 to 89 mol%, a propylene content of 10 to 59 mol%, and a diene content of 1 to 10 mol%. % Is preferable.

Furthermore, the Mooney viscosity of EPDM ML _{1 + 8} (100
C.) is preferably in the range of 5 to 100, more preferably 10 to 50.

The ethylene-propylene-diene copolymer rubber (EPDM) and the ethylene-propylene copolymer rubber (EPR) basically consist of the above repeating units. Within the range that does not impair the characteristics, for example, butene-1 or 4-methylpentene-1
Other repeating units, such as repeating units derived from α-olefins such as, may be included up to a proportion of 10 mol% or less.

Further, in the present invention, a hydrogenated styrene-butadiene block copolymer (SEBS: styrene-ethylene / butylene-polymer) is used as the olefin elastomer.
Styrene block copolymer), hydrogenated styrene-isoprene block copolymer (SEPS: styrene-ethylene
An elastomer such as propylene-styrene block copolymer) can also be used.

The content of styrene in the elastomer component is preferably 5 to 50% by weight, and further, its melt flow rate (MFR, 230 ° C., 2160 g load).
Is preferably in the range of 0.1 to 100 g / 10 min,
It is more preferably 1 to 50 g / 10 minutes.

As the monomer for modifying such an olefinic elastomer, the same one as the above-mentioned modified polyolefin can be used.

The content of the modifying monomer in the modified olefin elastomer is 0.05 to 5% by weight, preferably 0.1 to 5.
It is preferable that the content is within the range of 3% by weight. If the amount of modification by the modifying monomer is less than 0.05% by weight, the effect of improving the compatibility between the olefin elastomer and the polyamide resin is not sufficient, and if it exceeds 5% by weight, the mechanical strength is lowered.

The modified olefin elastomer can be produced by either a solution method or a melt-kneading method, as in the case of the above modified polyolefin. In the case of the melt kneading method, the olefin elastomer, the modifying monomer and the catalyst are put into an extruder, a twin-screw kneader or the like, and heated to a temperature of 150 to 250 ° C. to be kneaded while melting. In the case of the solution method, the above starting materials are dissolved in an organic solvent such as xylene,
Stir at a temperature of ~ 140 ° C.

In the present invention, an olefinic elastomer composition obtained by diluting the above-mentioned modified olefinic elastomer with an unmodified olefinic elastomer can also be used. As the unmodified olefin-based elastomer, the above-described modification-target olefin-based elastomer can be used.

In the case of an olefin elastomer composition,
The ratio of the modified olefin elastomer is 1% by weight or more, preferably 20% by weight, based on 100% by weight of the modified olefin elastomer and the unmodified olefin elastomer.
That is all. When the content of the modified olefin elastomer is less than 1% by weight, there is no sufficient effect for improving the compatibility between the olefin elastomer and the polyamide resin.

However, modified olefin elastomer +
The unmodified olefinic elastomer is 100% by weight, and the content of the modifying monomer is 0.05% by weight or more, and especially 0.
It is preferably from 2 to 3% by weight. When the content of the modifying monomer is less than 0.05% by weight, there is no sufficient effect to improve the compatibility between the olefin elastomer and the polyamide resin, which is not preferable.

(D) Inorganic Filler The inorganic filler is generally used as a filler such as a resin or a reinforcing material. For example, talc, mica,
Examples thereof include glass fiber, fiber crystalline calcium silicate, calcium carbonate, carbon fiber and the like. Of these, talc and mica glass fiber are particularly preferable. The average particle size of the inorganic filler is preferably 5 μm or less. In the case of needles or fibrous materials, the average fiber diameter is 0.2 to 20 μm,
An aspect ratio of 20 to 200 is preferable.

As the glass fiber, both chopped strands and rovings can be used, but those having an average fiber diameter of 6 to 20 μm and an aspect ratio of 100 to 1000 are preferable. Further, it is possible to use those which are surface-treated with a silane coupling agent and / or a binding agent made of a polymer having a carboxyl group or an acid anhydride group. Such surface treatment improves the adhesion between the glass fiber and the polyamide resin.

The proportion of each component as described above is such that (a) the polyamide resin is 50 to 90% by weight, preferably 55 to 85% by weight, and (b) the modified polyolefin (or The content of the polyolefin resin composition) is 2 to 40% by weight, preferably 5 to 30% by weight, and (c) the modified olefin elastomer (or the olefin elastomer composition containing the same) is 2 to 40% by weight.
%, Preferably 5 to 30% by weight.

If the polyamide resin content is less than 50% by weight, the mechanical strength and heat resistance are insufficient, while if it exceeds 90% by weight, the impact resistance decreases.

When the modified polyolefin (or the polyolefin resin composition containing the modified polyolefin) is less than 2% by weight,
The impact resistance is not sufficient, while if it exceeds 40% by weight, the oil resistance decreases.

The modified olefin elastomer (or the olefin elastomer composition containing the same) is 2
If it is less than 40% by weight, the impact resistance is insufficient.
If it exceeds, heat resistance and mechanical strength will decrease.

The mixing ratio of the inorganic filler (d) is 3 to 80 parts by weight, preferably 5 to 50 parts by weight, relative to 100 parts by weight of the resin component (total of (a) + (b) + (c)). Parts by weight.
(d) When the content of the inorganic filler is less than 3 parts by weight, the effect of improving the mechanical strength due to its blending is not sufficient, and when it exceeds 80 parts by weight, not only the moldability is lowered, but also the mechanical strength is lowered.

For the purpose of modifying the composition used in the solvent resistant container of the present invention, other additives such as a heat stabilizer, an antioxidant, a light stabilizer, a flame retardant, and a plasticizer are added. ,
An antistatic agent, a release agent, a nucleating agent, etc. can be added.

The above composition is prepared by mixing the above-mentioned components in an extruder such as a single-screw extruder or a twin-screw extruder at 220 to 300 ° C.
It can be obtained by kneading in a heating and melting state. The component (d) may be added from the beginning or after the resin components have been melt-kneaded to some extent.

The composition as described above can be made into a solvent resistant container by a usual molding method such as extrusion blow molding or injection molding.

In the case of extrusion blow molding, for example, a cylindrical parison is extruded at a temperature of 220 to 280 ° C. from an extrusion blow molding die having an annular orifice connected to an extruder, and the parison is shaped into a cavity having a desired container shape. The container can be manufactured by installing the mold in a mold having the above and then blowing. The blow molded solvent resistant container obtained as described above is suitable for having a capacity of about 0.1 to 20 liters, and the wall thickness of the container is about 1 to 3 mm.

In the case of injection molding, for example, a container can be manufactured by injecting a resin composition in a molten state at 220 to 300 ° C. into a mold having a desired cavity. Injection-molded containers obtained as described above are 2-40
It is suitable to have a capacity of about 1 liter, and the thickness of the container is about 1 to 3 mm.

The extrusion blow-molded container and the injection-molded container as described above can be used as a can-shaped body, a box-shaped body or the like by cutting at a desired position. In addition, other components such as caps, lids, handles and spouts are attached to the containers of various shapes obtained in this way by heat fusion, ultrasonic fusion, application of adhesive, etc. Alternatively, it can be attached and used by fitting.

[0059]

The solvent-resistant container of the present invention comprises a polyamide resin,
It is obtained from a composition comprising a resin component containing a modified polyolefin having a modifying monomer having a carboxyl group or an epoxy group, and a modified olefin elastomer in a predetermined amount and a predetermined amount of an inorganic filler. Therefore, it has good solvent resistance, oil resistance, impact resistance, mechanical strength, etc., and is suitable for industrial applications such as solvent containers and tool boxes.

Although the reason why such an effect is obtained is not always clear, by blending the polyamide resin, the modified polyolefin, and the modified olefin elastomer within the scope of the present invention, the respective phases can be well balanced. Melt, and thus the mechanical strength, heat resistance, gas barrier properties, solvent resistance and oil resistance of the polyamide resin,
Good balance of impact resistance and mechanical strength possessed by polyolefin, and impact resistance possessed by olefin-based elastomer are respectively exerted in a well-balanced manner as a solvent resistant container, and an inorganic filler for such resin component. It is considered that the mechanical strength is significantly improved by blending a predetermined amount of

[0061]

The present invention will be described in more detail by the following examples. The following resin components were used as raw materials. [1] Polyamide resin Ny6: [EMS, A28] [2] Modified polyolefin / maleic anhydride modified polypropylene CMPP: [Tonen Kagaku, C915X, maleic anhydride addition 0.2% by weight] [ 3] Modified olefin-based elastomer-Maleic anhydride modified ethylene-propylene copolymer rubber CMEPR [Tonen Kagaku KK, HA75, 0.8% by weight of maleic anhydride added] [4] Polyolefin-Propylene-ethylene block copolymer Combined BPP: [BJ-503 manufactured by Tonen Chemical Co., Ltd.] [5] Glass fiber GF: [CS03MAFT2A manufactured by Asahi Fiber Glass Co., Ltd.] [6] Talc TR: [LMS200 manufactured by Fuji Talc Co., Ltd.]

Examples 1 to 4 and Comparative Examples 1 to 5 Nylon (Ny6), polypropylene (BPP), modified polypropylene (CMPP) and modified olefinic elastomer (CMEPR) were dry blended in the blending ratios shown in Table 1, Input from the main hopper of a 40 mmφ twin-screw extruder, and add glass fiber (GF) at the ratio shown in Table 1.
Alternatively, talc (TR) was charged from the middle of the twin-screw extruder and kneaded at 250 ° C. to obtain pellets of the composition.

Using the obtained pellets, a test piece for a physical property test described later was prepared by injection molding, and the flexural modulus and Izod impact strength were measured, and the engine oil resistance was evaluated. The results are shown in Table 2.

Table 1 Composition (parts by weight) Example 1 Example 2 Example 3 Example 4 Ny6 60 60 60 80 CMPP 30 30 10 10 CMEPR 10 10 10 10 BPP − − 20 − GF 15 − 15 15 TR − 15 − −

Table 1 (continued) Composition (parts by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Ny6 60 100-100 60 CMPP 30 − − − 40 CMEPR 10 − − − BPP − − 100 − − GF − 15 15 − 15 TR − − − 15 −

Table 2 Physical Properties Example 1 Example 2 Example 3 Example 4 Bending elastic modulus ⁽¹⁾ Drying condition 35000 26000 35000 45000 Moisture absorbing condition 26000 18000 26000 31000 Izod impact strength ⁽²⁾ 23 ° C. 20 15 18 25 -30 ℃ 12 7 10 14 Engine oil resistance ⁽³⁾ Swelling ○ ○ ○ ○ Crack ○ ○ ○ ○

Table 2 (continued) Physical Properties Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Flexural Modulus ⁽¹⁾ Dry conditions 16000 51000 27000 35000 42000 Hygroscopic conditions 7500 18000 27000 13000 34000 Izod Impact strength ⁽²⁾ 23 ℃ NB ^* 8 13 3 9 -30 ℃ 10 7 10 36 Engine oil resistance ⁽³⁾ Swell ○ × ○ ○ ○ Crack ○ × ○ ○ ○ Note) *: Not broken.

(1) Flexural modulus: ASTM D790 at 23 ° C
Measured under dry conditions and under hygroscopic conditions (when the test piece was immersed in warm water at 50 ° C to absorb water up to the equivalent of 50% RH saturated water absorption) (unit: kg / cm ² ). (2) Izod impact strength: ASTM at 23 ℃ and -30 ℃
Measured by D256 (unit is kgcm / cm). (3) Engine oil resistance: Using a dumbbell-shaped test piece used in JIS K7113, after immersing it in engine oil for 300 hours without stressing the test piece, visually check for swelling and cracks, As for swelling, ○ means no swelling at all, △ means slightly swelling,
Those that were clearly swollen were evaluated as x, and as for cracks, those in which no cracks were observed were evaluated as ◯, and those in which cracks were generated were evaluated as x.

As is clear from Table 2, Examples 1 to 4
The composition (1) had excellent impact resistance and excellent flexural modulus under dry and hygroscopic conditions, and neither swelling nor cracking was observed even when immersed in engine oil. On the other hand, the composition of each Comparative Example was significantly inferior in at least one of the above physical properties.

[0070]

As described in detail above, the solvent resistant container of the present invention comprises a polyamide resin, a modified polyolefin containing a modifying monomer having a carboxyl group or an epoxy group, and a modified olefin elastomer in a predetermined amount. Since it is obtained from a composition in which a resin component contained therein is mixed with a predetermined amount of an inorganic filler, it has excellent solvent resistance, oil resistance, impact resistance, mechanical strength and the like.

The solvent resistant container of the present invention can be a container manufactured by various molding methods such as an extrusion blow molding container and an injection molding container. Such a solvent resistant container of the present invention is suitable for industrial use such as a solvent container and various tool boxes.

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Claims (1)

[Claims] 1. (a) 50 to 90% by weight of polyamide resin,
(b) a modified polyolefin, or 2 to 40% by weight of a polyolefin resin composition containing 1% by weight or more of the modified polyolefin, and (c) a modified olefin elastomer,
Or 1% by weight of the modified olefin elastomer
2 to 40% by weight of the olefinic elastomer composition contained above and 3 to 80 parts by weight of the (d) inorganic filler with respect to 100 parts by weight of the total of (a) + (b) + (c). A solvent resistant container comprising a composition. [0001]