JPH02247242A - Resin composition - Google Patents

Abstract

PURPOSE:To provide a resin composition having excellent mechanical strength, solvent resistance and moldability and composed of a polyolefin, a polyphenylene ether, a specific block copolymer and an ethylenic elastomer modified with a styrene compound. CONSTITUTION:The objective composition is produced by compounding (A) 20-95wt.% of a polyolefin resin (preferably crystalline propylene polymer), (B) 80-5wt.% of a polyphenylene ether resin (preferably polymer of 2,6- dimethylphenol). (C) 3-45 pts.wt. (based on 100 pts.wt. of A+B) of a block copolymer of a partially hydrogenated alkenyl aromatic compound and isoprene and containing 20-80wt.% of the alkenyl aromatic compound unit and (D) 3-45 pts.wt. (based on 100 pts.wt. of A+B) of a copolymer having an MFR of 0.1-50g/10min and produced by grafting 0.3-50 pts.wt. of a styrene compound to 100 pts.wt. of an ethylene-alpha-olefin copolymer having an ethylene content of 30-93mol%.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is directed to a resin that exhibits particularly excellent mechanical properties (1) balance, mainly in terms of rigidity, and has good moldability, oil resistance, and chemical resistance. Concerning the composition.

Specifically, it consists of polyolefins, especially crystalline polyolefins, polyphenylene ether resins, partially hydrogenated alkenyl aromatic compound-isoprene block copolymers, and specific ethylene-based elastomers, and has a good balance of mechanical properties centered on rigidity and heat resistance. The present invention relates to a resin composition for cutting molding, extrusion molding, or blow molding, which has excellent molding processability, organic solvent resistance, and chemical resistance.

[Conventional technology and its problems 1 Polyolefins have been widely used in various molded products and sheets because they have excellent moldability, toughness, water resistance, organic solvent resistance, chemical resistance, etc., and are low in specific gravity and inexpensive. Although it is widely used, its heat resistance requires improvement, which is an obstacle to developing new uses.

On the other hand, although polyphenylene ether resin has excellent heat resistance, it has drawbacks in moldability and solvent resistance, so its range of use is limited. For the purpose of improving moldability and impact strength, etc., it is blended with styrene resin and used, but its range of use is limited due to the drawback of solvent resistance. Not suitable for fields that require resistance to oily solvents.

Various blend compositions have been proposed to combine the advantages of these polyolefins and polyphenylene ethers and compensate for their disadvantages, such as compositions aimed at improving processability and tensile strength (Japanese Patent Publication No. 42-7069). However, they cannot always satisfy the relatively high mechanical strength levels required in the industrial field. In addition, for the purpose of further improving the compatibility of polyolefin and polyphenylene ether resin and improving mechanical strength, compositions containing, for example, block copolymers of styrene and butadiene or hydrogenated products thereof are prepared. (Unexamined Japanese Patent Publication No. 53-
No. 71158, JP-A-54-88960, JP-A-59
-100159, etc.), and a composition obtained by adding an inorganic filler to these components (JP-A-58-103556).
Although the moldability and mechanical strength are improved, the amount of polyolefin blended is small, or the matrix (continuous phase) is a polyphenylene ether resin or a mixture of polyphenylene ether resin and styrene resin. Because it consists of a combination of these, the organic solvent resistance of polyolefins cannot be fully exhibited. In addition, a large amount of polyolefin exceeding 20% by weight is blended with the polyphenylene ether resin, and a diblock copolymer or radial teleblock copolymer consisting of an alkenyl aromatic compound and a conjugated diene is added as a compatibilizer, and the hydrogenation force thereof is added. 1
Composition comprising 111 polymers
557 @, Japanese Patent Publication No. 60-76547) was proposed,
Using low density polyethylene as an example of polyolefin,
A blend of this and polyphenylene ether resin is
It is said that by blending a hydrogenated alkenyl aromatic compound-co-1Ω diene diblock copolymer, compatibility can be improved and tensile properties, brittleness, etc. can be improved. However, improving compatibility alone is not sufficient to satisfy the various properties required of resins in general. For example, JP-A-60-
No. 76547, the composition is composed of a polyphenylene ether, a low density polyethylene as the polyolefin as the bulk component, and an alkenyl aromatic-conjugated diene diblock copolymer hydrogenate as the compatibilizing component of both components. Resin compositions made of these components have a significantly inferior level of rigidity, and therefore have limited uses. In addition to the above combination, a resin composition using polypropylene as the polyolefin has slightly improved rigidity and heat resistance, but there are still cases where it is insufficient for practical use, and there is still room for improvement.

[Means for Solving the Problems] In view of the above-mentioned problems, the present inventors have made further improvements to achieve a relatively high level of mechanical strength required in various applications, such as the field of industrial parts. We conducted an intensive search to provide a resin composition that has a balance, solvent resistance, and moldability.

For this purpose, we investigated polyphenylene ether resin, polyolefin, and various compounding agents, and found that polyphenylene ether resin, polyolefin,
Desirably, excellent IrA can be achieved by blending a hydrogenated product of an alkenyl aromatic compound-conjugated diene block copolymer with a specific structure and an ethylene elastomer with a specific structure into a combination of crystalline polyolefins.
The present invention was completed based on the discovery that a resin composition with well-balanced physical properties and good solvent resistance and moldability can be obtained.

That is, the present invention comprises (a) a polyolefin resin of 20 to 95% by weight, and (b)
The combination of 80 to 5% by weight of polyphenylene ether resin and the components (a) and (b) is; 1 amount of 100% by weight, (C) partially hydrogenated alkenyl aromatic compound isoprene block copolymer 3 ~45 Quick part and (
d) A resin composition characterized by containing 3 to 45 parts by weight of an ethylene-α-olefin copolymer elastomer modified by graft copolymerization with a styrene compound.

[Structure of the invention] (a) Component: Polyolefin (SI I) Fi The polyolefin used in the present invention is propylene, butene-1
, pentene-1, hexene-1,3-methylbutene-1
, 4-methylpentene-1, heptene-1, octene-
Homopolymers of α-olefins with 1 or more carbon atoms and 3 or more α-olefins, α-olefins containing the majority of these α-A reflexes and ethylene
Mutual copolymers with olefins in the form of random, block, etc. and mixtures thereof, copolymers of majority weight of α-olefin with 3 or more carbon atoms with other unsaturated intermediates in random, block, graft, etc. It is a combination, or an oxidized, halogenated, or sulfonated product of these polymers,
Those exhibiting at least partial crystallinity are preferred.

Other unsaturated monomers include acrylic acid, methacrylic acid, maleic acid, itaconic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, maleic anhydride, arylmaleimide, alkylmaleimide, etc. Saturated organic acids or derivatives thereof: vinyl esters such as vinyl acetate and vinyl acetate; aromatic vinyl compounds such as styrene and methylstyrene; vinylsilanes such as vinyltrimethylmethoxysilane and γ-methacryloyloxypropyltrimethoxyrane, dicyclopentadiene, 4-ethylidene-2-norbornene, 4-methyl1,4-to4
Non-conjugated dienes such as sadiene and 5-methyl-14-hexadiene are used.

In the case of copolymers, α-olefins and other monomers are
It is not limited to two types, but may be composed of multiple types.

These polymers can be obtained by polymerization or modification using known methods, or commercially available polymers may be appropriately selected and used. Of course, they can be used together.

Among these, copolymers or homopolymers containing propylene and butene-1,3-methylbutene-1,4-methylpentene-1 in the majority are preferred, and especially crystalline propylene polymers, that is, crystalline propylene Homopolymers, crystalline propylene-ethylene block or random copolymers, these crystalline propylene polymers and α-olefin rubbers, i.e. rubbery copolymers consisting of multiple α-olefins or multiple α-olefins A mixture of a rubber-like copolymer with a non-conjugated diene and a non-conjugated diene is preferable from the viewpoint of mechanical property balance.

These crystalline propylene polymers and α-
Melt flow rate of mixtures containing olefin rubber (
MFR) (230℃, load 2.16/(g)LJo
, 01-400 (7) range is preferred, 0.15-6
A range of 0 is more preferable. If the VFR value is less than 0.01, moldability tends to be difficult, and if it is more than 400, the mechanical strength level is low, which is not preferable.

As polyolefins, those with smaller MFR values,
That is, high-molecular-weight materials are subjected to known methods such as heat treatment in the presence or absence of radical generators (organic and inorganic peroxides, organic tin compounds, organic azo compounds, etc.), or during melt-kneading. This includes those whose molecular weight has changed due to heating, mechanical shearing, etc., and which has fallen within this VFR range.

(b) Component: Polyphenylene ether resin The polyphenylene ether resin used in the present invention has a cyclic structural unit represented by the general formula, where - one unit]
--chile oxygen [the turtle is connected to the next adjacent intermediate penpin nucleus, r) is at least 30, and each of the plurality of R's is independently hydrogen, halogen, tertiary Hydrocarbon radicals containing no α-carbon, halohydrocarbon radicals with at least two carbon atoms between the halogen atom and the phenyl nucleus, hydrocarbon A xy groups, and halogen atoms and phenyl RYJ represents a selected single substituent from a hydrocarbon A-oxy group having at least b2 carbon atoms between it and the nucleus.

Typical examples of polynyl nylene ethers include poly(2,6-dimethyl-1,4-phenylene) ether, poly(2,6-di]-thyl-1,4-phenylene) ether, and poly(2,6-di]thyl-1,4-phenylene) ether. -methyl-6-ethyl-1,4-phenylene)
-[-thyl, poly(2-methyl-6-broby-1,4-phenylene) ether, poly(2,6-diproby-1,4-phenylene) ether, poly(2-ethyl-6-broby-1,4- phenylene) ether, poly(2,6-cyptyl-1,4-phenylene) ether, poly(2,6-diprobenyl-1,4-phenylene) ether, poly(2,6-dilauryl-1,4-phenylene) ether, Poly(2,6-diphenyl 1,4-phenylene) ether, Poly(2,6-simethoxy 1,4-phenylene) ether, Poly(2,6-jethoxy-1,4-phenylene) ether, Poly(2- Methoxy-6-■toxy-1,4-phenylene) ether, poly(2-ethyl-6-methialyloxy-1,4-phenylene) ether, poly(2,6-dichloro-1,4-phenylene) ether, Poly(2-methyl-6-phenyl-1,4-phenylene) ether, Poly(2,6-dipenzyl-1,4-phenylene) ether, Poly(2-ethoxy-1,4-phenylene) ether, Poly(2-ethoxy-1,4-phenylene) ether -chloro-1,4-phenylene) ether, poly(2,5-dibromo-1,4-phenylene) ether and the like.

Also,? , 6-dimethylphenol and 2.3.6-1~
Copolymer of limethylphenol, copolymer of 2.6-dimethylphenol and 2.3,5.6-tetramethylphenol, copolymer of 2.6-diedylphenol and 2.3.6-dolimethylphenol Mention may also be made of copolymers such as copolymers.

Furthermore, the polyphenylene ether used in the present invention is
It also includes polyphenylene ethers modified by grafting styrene nail particles (eg, styrene, p-methylstyrene, α-methylstyrene, etc.) onto the polyphenylene ether defined by the above general formula.

Methods for producing polyphenylene ether corresponding to the above are known, and are described, for example, in the specifications of U.S. Pat. No. 3,306,874 Tan, U.S. Pat.
No. 0 and JP-A No. 50-51197.

Preferred polyphenylene ethers for the purposes of the present invention are those having alkyl substituents in two positions ortho to the ether oxygen atom and copolymers of 2,6-dialkylphenol and 2,36-trialkylphenol.

Among these, a polymer of 2,6-dimebruphenol is particularly preferred. In addition, the preferred molecular weight range is 0.2 to 0.7 d, Q/
9, more preferably 0.25 to 0.6d,
ll/9, more preferably 0.3 to 0.1/9.
The range is 55 drJ/y. Intrinsic viscosity is 0.2d, l
In a range smaller than 1/9, the mechanical strength of the composition becomes unsatisfactory, and 0.7 dfJ/! ? A larger range is not preferable because the molding processability of the composition becomes low.

Further, the raw weight or less of polyphenylene ether may be replaced with a styrene resin such as polystyrene, high impact polystyrene reinforced with various rubbers, ABS resin, etc.

(C) Component Two Partially Hydrogenated Alkenyl Aromatic Compound-Isoprene Copolymer The partially hydrogenated alkenyl aromatic compound-isoprene block copolymer used in the present invention refers to a chain block derived from an alkenyl aromatic compound. This is a block copolymer in which the aliphatic unsaturated groups of block B of an alkenyl aromatic compound-isoprene block copolymer having a structure each having at least one chain block rBJ derived from isoprene and rBJ derived from isoprene are reduced by hydrogenation. Block A
The arrangement of and B includes a so-called radial teleblock structure, which is a linear structure or a branched structure.

The distribution of monomer components is not particularly limited, and may be uniform or non-uniform, and -E may be distributed roughly along the molecular chain.
It may also have a tapered shape in which the amount of the Tsumar component increases or decreases. Therefore, multiple A blocks or B blocks
The molecular weight of each block may be the same or different. Further, a part of the back of these structures may contain a random chain derived from a random copolymerization portion of an alkenyl aromatic compound and isoprene. Among these, diblocks having a linear structure (A-B block),
l-Reblock (A-B-A block.

B-A-B block), tetra block (A-B-A-
B block), pentablock (A-BA-B-A block, B-A-B-A-8 block), or a linear structure containing a block in which the total number of blocks of A and B is 6 or more. are more preferable, and among these, diblock, 1 to
A rib [1 piece, tetra block structure is more preferable,
Particularly preferred is one having an AB diblock structure.

The alkenyl aromatic compound with block A has the chemical structure shown in the following general formula, where R1 and R
2 is selected from the group consisting of hydrogen and a lower alkyl group or alkenyl group having 1 to 6 carbon atoms, R and R4 are hydrogen,
f! is selected from the group consisting of a lower alkyl group having 1 to 6 carbon atoms, chlorine, and bromine, and R, R, and R7 are hydrogen, a lower alkyl group having 1 to 6 carbon atoms, and an alkenyl group. Y, or R6 and R7 may be connected together with a hydrocarbyl group to have a naphthyl group.

Specific examples of alkenyl aromatic compounds include styrene, paramethylstyrene, α-methylstyrene, vinylxylene, vinyltoluene, vinylnaphthalene, divinylbenzene, bromostyrene, and chlorostyrene, and a combination of them is also possible. Among these, styrene, α-methylstyrene, paramethylstyrene, vinyltoluene, and vinylxylene are preferred, and styrene is more preferred.

The proportion of repeating units derived from alkenyl aromatic compounds in the partially hydrogenated alkenyl aromatic compound-isoprene block copolymer (C) is 20% by weight.
It is preferably in the range of more than 80% by weight and less than 80% by weight, particularly preferably in the range of 25% by weight and less than 65% by weight.

If the proportion of the repeating units derived from the alkenyl aromatic compound in the partially hydrogenated alkenyl aromatic compound-isobrene block polymer (C) exceeds 80% by weight, the impact strength of the resin composition is unsatisfactory. If it is less than 20 min, the rigidity level and heat resistance of the resin composition will be unsatisfactory and the object of the present invention cannot be achieved, which is not preferable.

In these block copolymers (C), the proportion of unsaturated bonds originating from isoprene and remaining without being hydrogenated behind the aliphatic chain moiety is preferably 50% or less, and 20% or less.
% or less is more preferable, and even more preferably 10% or less.

Further, about 25% or less of the aromatic unsaturated bonds derived from the alkenyl aromatic compound may be hydrogenated.

These hydrogenated block copolymers (C) have a number average molecular weight of 5,000 (j/mo+ More than 50
0,000g/mo! The following are preferred, 10.
000 SF/no 1 or more 300,000 g/
More preferably, it is less than mo1. More preferably 3
It is in the range of 0.0009 to 200.0009/not, particularly preferably 45,000 to 150.0009/not. Measured by gel permeation chromatography, the average molecular weight value according to the polystyrene conversion method is 50.
Those having a molecular weight exceeding 0,000 g/mol and those having a number average molecular weight of less than 5,000 sh/ma+ by the same method tend to be relatively expensive in terms of manufacturing costs.

In the measurement by glupermeation chromatography, monodisperse polystyrene was used as a standard substance when determining the relationship between elution time and molecular weight. Each average molecular weight was a polystyrene equivalent molecular weight.

Molecular weight of these hydrogenated block copolymers (C) i5
can be measured by the gel permini-cycon chromatography described above, but the preferred molecular weight (1) is not particularly limited, and the so-called Q value, which is calculated by dividing the weight average molecular weight by the number average molecular weight It can be in any range.Also, it may have more than one mountain-shaped dispersion of molecular weight i, or it may have a molecular weight higher or lower than the main dispersion in addition to the main dispersion of Yamabushi. It is also possible to use a material that contains a small amount of molecular weight components and exhibits a shape of molecular group distribution that has a mountain-shaped main dispersion and a trailing tail.

The molecular weights of the alkenyl aromatic chain block (to block) and the hydrogenated isoprene chain block (block B) in these hydrogenated block copolymers (C) are:
Various types and types of duckweed can be used as long as they have a number average molecular weight within the above range.

These hydrogenated block copolymers (C) have hydrogenated isoprene polymerization chain moieties, and some exhibit crystallinity derived from this chain. This is presumed to be because the hydrogenated isoprene polymer chain has a molecular structure similar to polyolefin. Crystal ↑4 of the hydrogenated block copolymer (C) has differential scanning calorimetry (abbreviated as DSC).

) can be used for measurement.

As the hydrogenated 7Jn block copolymer (c) in the present invention, any one exhibiting any crystallinity can be used.

Any glass transition temperature based on the hydrogenated isoprene polymer chain portion of the hydrogenated block copolymer (C) can be used.

The glass transition temperature can be measured by the above-mentioned DSC method or the Wit change behavior of viscoelasticity using a mechanical spectrometer or the like.

Many methods have been proposed for producing alkenyl aromatic compound-isoprene block copolymers.

As an alternative method, for example, Japanese Patent Publication No. 40-23798
No. 3,595,942 and U.S. Pat. No. 40,909
There is a method described in No. 96, etc., in which block copolymerization is carried out in an inert solvent such as Kirin in a Schiff mill using a lithium catalyst or a Ziegler type catalyst. As one of such block copolymers, [TI? Some are commercially available under trade names such as 2400J. Hydrogenation treatment of these block copolymers is described, for example, in Japanese Patent Publications No. 42-8704 and No. 43-
It is carried out by hydrogenation in the presence of a hydrogenation catalyst in an inert solvent such as cyclohexylline, for example, by the method described in the specifications of No. 6836 or No. 46-20814.

Also, Journat of Polymer Sc
i, encc Part B Polymer Let
ters Volume 11. ,! 127~
It is also possible to carry out the hydrogenation using valatoluenesulfonyl hydrazide or the like in an inert solvent according to the method shown in P. 434 (1973).

Component (d): Modified ethylene elastomer The modified ethylene-α-olefin copolymer used in the present invention is obtained by graft copolymerizing an ethylene-α-olefin copolymer with a subrene compound.

The ethylene-α-olefin copolymer to be subjected to graft modification must have an ethylene content in the range of 30 to 93 mol%, and preferably in the range of 135 to 90 mol%. Even if the ethylene content of the ethylene-α-olefin copolymer becomes greater than 93 mol% or less than 30 mol%, the ethylene-α-olefin copolymer becomes highly crystalline, and the impact resistance of the composition decreases. The improvement effect of the ethylene-α-olefin copolymer at 190'C [MFR, 190
It is desirable that the value measured at C (ASTH0-1238E Article Ino) 1 is in the range of 0.1 to 50 g/10 minutes, and especially necessarily in the range of 0.2 to 20 g/10 minutes. preferable. Even if the M FR of the ethylene-α-olefin copolymer is smaller than 0.Is/10 min or larger than 50 g/10 min, the effect of improving impact resistance tends to be reduced.

Furthermore, the density of the ethylene-α-olefin copolymer is 0.
．． It is preferably in the range of 9057/cm3 or less,
More preferably, it is in the range of 0.85 to 0.899/cm3. In general, it is preferable that the ethylene-α-olefin copolymer has low crystallinity or non-quality properties, and its crystallinity is usually in the range of 0 to 50%, preferably in the range of 0 to 40%. It is.

The α-olefin component units constituting the ethylene-α-olefin copolymer are α-olefins having 3 to 8 carbon atoms, and include propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, Examples include 1-decene, and one or a mixture of two or more of these may be used.

The ethylene-α-olefin copolymer is usually a copolymer of an ethylene component and an α-olefin, but 5 mol%
There is no problem even if the diene component is contained within the following range.

Specific examples of diene components include dicyclopentadiene,
Ethylidene norbornene is a typical example.

The styrene compound to be graft copolymerized to the ethylene-α-olefin copolymer is the alkenyl aromatic compound described above. Also, majority type.

It is also possible to use it in combination with other styrene compounds that can be copolymerized with the styrene compound in between. Specific examples of such hexamers include acrylic acid, methacrylic acid, maleic acid, maleic anhydride, methyl acrylate, ethyl acrylate, methyl methacrylate, glycidyl methacrylate, glycidyl acrylate, maleide, and the like.

The grafting ratio of the grafting monomer is the ethylene-α-
Olefin copolymer 100i! It is preferably in the range of 0.3 to 50 parts by weight, and particularly preferably in the range of C to 20 parts by weight. When the grafting ratio of the styrene hydrocarbon is less than 0.3 parts by weight, the compatibility with the polyphenylene ether resin becomes poor, delamination tends to occur, and the effect of improving impact resistance becomes small. Furthermore, if the grafting proportion of the styrene hydrocarbon exceeds 50 parts by weight, the grafted deformed product no longer exhibits the properties of a rubber-like elastic body, and the effect of improving the impact resistance of the polyphenylene ether resin is reduced. Furthermore, the styrenic hydrocarbon graft monomer α-
Olefin copolymer melt flow rate-1 ~ [VFR,
The value measured at 190° C. under a load of 2160 g] is 0.1 to 50/10 minutes, preferably 0.2 to 20 g.
/10 minutes range.

The modified ethylene-α-olefin copolymer used in the present invention can be prepared by melting the ethylene-α-olefin copolymer directly or dissolving it in a solvent, adding a radical initiator and the grafting monomer (713), and carrying out the graft reaction. Preferably, it is prepared by Graph 1 - For the reaction, reactors, extractors, kneaders, etc. are used. As radical initiators, organic peroxides, organic bersesters such as benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, diter
t-Butylperoxide, 2,5-dimethyl 2,5-di(peroxidebenzoate)hexyne 3.1,4-bis(tert-butylberoxoisopropyl)benzene, lauroylperorxito, te-butylberacetate-1 to, 2,5-dimethyl-2,5-di(tert-
butylperoxy)hexyne 3.2.5-dimethyl-2
,5-di(tertbutylbutyoxy)bequinone, t
e-butylperbenzoate, tert-butylperphenylacetate-1~, tert-bubruber isobutyrate, tert-dibruber-5ec-octoate, tert-butylbelpivalate, cumylperpivale-1~ and tert-butylberdiethyl Acetate, its azo compounds such as azobisisobutyronitrile, dimethylazoisobutyrate. Among these, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di(tert-
butylperoxy)hexyne 3,2,5-dimethyl-2
,5-di(tert-butylperoxy)hekirin, 1
, 4-bis(tert-butylperoxyisopropyl)benzene and the like are preferred.

[Composition ratio of constituent components] The polyolefin component (
The ratio of a) is 100% by weight of the total amount of polyolefin (a) and polyphenylene ether resin (b),
A range of 20 to 95% by weight is recommended, preferably a range of 30 to 95% by weight, and particularly a range of 40 to 90% by weight.

If it is less than 20% by weight, the organic solvent resistance will not be sufficient, and if it exceeds 95% by weight, the heat resistance will be at an unsatisfactory level, making it impossible to achieve the object of the present invention, which is not preferable.

Similarly, the ratio of the polyphenylene ether resin of component (b) is 10% of the total amount of resin components (a) and (b).
80-5% is recommended as the 0-car spacing%, and a range of 70-5% is preferred, especially 60-1%.
A range of 0% by weight is preferred. If it is less than 5% by weight, the rigidity level will be unsatisfactory, and if it exceeds 80% by weight, the organic solvent resistance will be insufficient, which is not preferable.

The amount of the partially hydrogenated alkenyl aromatic compound-isobrene block copolymer of component (C) is determined from the above (a) and (b).
The combined amount of the components is preferably in the range of 3 to 45 parts by weight, particularly preferably in the range of 5 to 40 parts by weight, and particularly preferably in the range of 5 to 30 parts by weight. If it is less than 3 parts by weight, the impact strength level will be insufficient, and if it exceeds 45 parts by weight, the rigidity level will be unsatisfactory, making it impossible to achieve the object of the present invention.

The proportion of the modified ethylene-α-Δrefine copolymer of component (d) is 100% of the total St amount of components (a) and (b) above.
The range is preferably from 3 to 45 parts by weight, particularly preferably from 5 to 30 parts by weight. If it is less than 3 parts by weight, the impact strength level will be insufficient, and if it exceeds 45 parts by weight, the rigidity level will be unsatisfactory, which is not preferable because the object of the present invention cannot be achieved.

In the present invention, in addition to the above-mentioned components, other additional components may be added as necessary to the extent that the effects of the present invention are not impaired, such as an antioxidant, a weather resistance improver, a nucleating agent for polyolefin, and a slip agent. , inorganic or organic fillers and reinforcing agents, flame retardants, various colorants, antistatic agents, mold release agents, and small amounts of radical generators (organic peroxides, etc.) for controlling the molecular weight of polyolefins. No problem.

Also used in polyphenylene ether resin] 5J plasticizers such as liphenyl phosphate, glass fiber, wollastonite, potassium titanate, rice cake, etc.
Fillers such as mica, talc, and calcium carbonate are effective in improving the balance of physical properties such as rigidity, moldability, J-method accuracy, and dimensional stability.

[Blending method] Generally, the blending method for obtaining the resin composition according to the present invention involves mixing resins together or combining resins with stabilizers, colorants,
Furthermore, various methods of blending the resin and filler can be applied. For example, powdered or granular components are uniformly dispersed in a Henschel mixer, Super Miki 4-no, ribbon blender V blender, etc., and then a twin-screw mixed extruder, a -screw mixed extruder, Roll, Banbury mixer, blast mill,
A Brabender Blastgraph melt kneader can be used. The melt-kneading temperature is usually in the range of 200'C to 350C. The resin composition obtained as described above can be melted and mixed and then extruded into pellets.

[Application of the resin composition according to the present invention] The resin composition according to the present invention can be easily molded by moldability generally applied to thermoplastic resins, such as straight index molding, extrusion molding, and blow molding. Of these, injection molding is most preferred. Due to its good mechanical properties, it is suitable for automobile parts, specifically exterior parts such as bumpers, doors, door panels, fenders, moldings, emblems, wheel force bars, engine hoods, roofs, spoilers, and instrument panels. It is suitable for interior parts such as console boxes and trims, and also for exterior parts of electrical equipment, specifically for parts such as televisions, refrigeration systems, and so-called office automation equipment.

[Examples] The present invention will be explained below with reference to Examples and Comparative Examples.
These are merely examples, and the present invention is not limited thereto.

Measurement and Evaluation Methods In the Examples and Comparative Examples shown below, each physical property value and various properties were measured and evaluated under the following conditions.

1) MFR (measure of flowability) MFR of polyolefin was measured according to JIS K 7210-1975.

2) Flexural modulus (standard of rigidity) ISOR178-1974 Procedure 12
(JIS K 7203), it was measured using an Instron testing machine.

3) Izot impact value ISOR180-1969 (JIS 7110) (
It was measured using an Izot impact tester manufactured by Toyo Seiki Seisakusho in accordance with the notched Izot impact strength.

4) Heat distortion temperature (measure of heat resistance) ISOR75-1958Method A (JIS
K 7207-1974 A method). Note that injection molded specimens were used that had been annealed at 100'C for 30 minutes.

Reference Example 1 Production of styrene-grafted modified edylene-propylene copolymer Edylene-propylene comonopolymer rubber (manufactured by Sumitomo Chemical Co., Ltd., Nisprene E-120: trade name) 100 parts by weight, 40 parts by weight of styrene, 500 parts by weight of water 1.5 parts by weight of benzoyl peroxide, 3 parts by weight of calcium phosphate, and 3 parts by weight of polyethylene glycol were charged into a polymerization tank, and the inside of the tank was sufficiently purged with nitrogen while stirring. Thereafter, heating was carried out at 90°C for 1 hour and then at 110°C for 1 hour. As a result of extracting the polystyrene in the 1q graft copolymer with mebru ethyl ketone, it was confirmed that about 20% by weight of styrene was graft copolymerized in the copolymer.

Example 1 Propylene homopolymer (manufactured by Sumitomo Chemical Co., Ltd., Sumitomo Noblen D-501: trade name), poly-(2,6-dimethylphenylene) ether (manufactured by Sumitomo Chemical Co., Ltd.), hydrogenated styrene-isoprene block copolymer The polymer is hereinafter abbreviated as hydrogenated Sl. ) (manufactured by Shell Chemical Co., Ltd., Kraton G1701X:
(trade name) and the styrene graft copolymerized modified ethylene-propylene copolymer obtained in Reference Example 1 were mixed in a super mixer at the blending ratio shown in Table 1, -50> Woyoi 260~2
The mixture was melted and mixed at 80°C to obtain pellets. Table 1 shows the physical property measurement results.

Comparative Example 1 Hydrogenated styrene-butadiene-styrene block copolymer (hereinafter abbreviated as hydrogenated SB) was used instead of the hydrogenated styrene-inprene block copolymer of Example 1. Pellets were obtained in the same manner as in Example 1 except that Hen 1650 (trade name) was used. Table 1 shows the physical property measurement results.

Comparative Example 2 In place of the styrene-kraft copolymerized modified ethylene-propylene copolymer of Example 1, an unmodified ethylene-propylene copolymer (manufactured by Sumitomo Chemical Co., Ltd., Sprene E-120: trade name) was used. Except for this, Beret 1~ was obtained in the same manner as in Example 1. Table 1 shows the physical property measurement results.

Comparative Example 3 Pellets were obtained in the same manner as in Example 1 except that the styrene graft copolymerized modified ethylene-propylene copolymer of Example 1 was not used. Table 1 shows the physical property measurement results.

As is clear from a comparison of Example 1 and Comparative Examples 1 to 3, the hydrogenated 1/1" styrene-isoprene block copolymer and the styrene graft copolymerized modified ethylene-propylene copolymer in the composition of the present invention The combination of these shows uniquely good physical properties.

Examples 2 to 5 The pellets were molded in the same manner as in Example 1 using the blending ratios shown in Table 2 to obtain pellets, and their physical properties were evaluated. The results are shown in Table 2. The components used in Table 2 are as described above.

Polypropylene homopolymer Nitsukitomo Chemical Co., Ltd., attached table Noblen D-5
01 (Product name) Lantum copolymer dino'ropylene-1 Brene Lancum copolymer [Tsuketomo Chemical Co., Ltd., Tsuketomo Nobrene S-131 (Product name)] Block copolymer: Propylene-ethylene block copolymer [Tsukutomo Manufactured by Kagaku Ne1, I↑ Tomo Noblen AS-171A (Product name)] Polyph 1
．． -Renite-ter: Bory(2,6-dimethylphenylene) ether [(manufactured by J Yukagaku Nei [manufactured]) Hydrogenated S■ Nidylene': γ1HLf Clayton G-
1701 + 4-engineered tyrene-U-pyrene copolymer (fJ in Reference Example 1) Nisprene graft copolymerization modified Eblene-brobylene-earthylidene norbornene copolymer (Nisprene instead of Nisprene E-120 in Reference Example 1) E-5018) Nisbrene graft copolymerization Modified ethylene-benzene polymer (@Example 1 Q) In place of l-Snorene E-120, E-120-1 covalent polymer (contains butyne 15W%) (used) [Effect of shading] As explained above, the resin composition of the present invention exhibits an excellent mechanical strength balance, and has good solvent resistance and moldability.

The resin composition according to the present invention can be easily processed into a molded product by a general thermoplastic ↑1 molding method applied to resin compositions, such as q] extrusion molding, blow molding, etc., and has an impact resistance of +1. [, heat resistant ↑4L13 and solvent resistant T4 etc. □[
Achieve a good balance of j■ (to produce a product with good uniformity of appearance, excellent hardness and smoothness of 1/l).

14th edition applicant: Sumitomo Chemical Co., Ltd.

Claims (1)

[Scope of Claims] (a) 20 to 95% by weight of a polyolefin resin; (b)
80 to 5% by weight of the polyphenylene ether resin and 3 to 45 parts by weight of (c) partially hydrogenated alkenyl aromatic compound-isoprene block copolymer based on 100 parts by weight of the total amount of components (a) and (b). part and (d)
A resin composition comprising 3 to 45 parts by weight of an ethylene-α-olefin copolymer elastomer modified by graft copolymerizing a styrene compound.