JPH0423814A - Production of modified olefinic elastomer - Google Patents

Abstract

PURPOSE:To modify a specific olefinic elastomer with inhibiting reduction of molecular weight, discoloration and generation of irritating odor by subjecting respectively specific olefinic elastomer and glycidyl compound in a specific ratio. CONSTITUTION:100 pts.wt. olefinic elastomer composed of 5-95wt.%, preferably 10-90wt.% ethylene and 95-5wt.%, preferably 90-10wt.% alpha-olefin other than ethylene (e.g. propylene) is charged to, e.g. an extruder together with 0.1-30 pts.wt., preferably 0.1-10 pts.wt. glycidyl compound expressed by the formula (R is H or 1-6C alkyl; Ar is glycidyloxy group-containing 6-20C aromatic hydrocarbon group; (n)is 1-4) and heated, melted and mixed at 180-300 deg.C for 0.1-20min to efficiently obtain a modified olefinic elastomer having a high grafted fraction and suitable as a compatibilizing agent for a resin composition.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method for producing a modified olefin elastomer suitable as a compatibilizer for various resin compositions, and in particular, a method for producing a modified olefin elastomer that is suitable for use as a compatibilizer for various resin compositions. The present invention relates to a method for producing a modified olefin engineered elastomer with a high yield.

[Conventional technology]

Polyolefins are low cost and have excellent moldability, insulation, chemical resistance, mechanical strength, etc., so they are widely used in various applications such as films, fibers, and molded products.

However, since polyolefins are non-polar molecules, even if these elastomer components are blended to improve the impact resistance of highly polar polymers such as nylon, polyester, and polycarbonate, their compatibility is poor. It is not possible to obtain a composition with excellent appearance and mechanical properties of a molded article.

In order to improve the properties of such polyolefin resins, research is being conducted on graft polymerization of various unsaturated compound monomers.

JP-A-50-52156 discloses a modified polyolefin composition obtained by melt-kneading a radical generator, a porous filler, a polyolefin mainly composed of propylene, and a polar vinyl monomer at a high temperature higher than the decomposition temperature of the radical generator. Discloses a manufacturing method.

JP-A-52-105993 discloses a method for producing a modified polypropylene, which is characterized in that polypropylene, liquid rubber, and maleic anhydride are reacted in a solvent using a radical generator.

JP-A No. 55-50040 discloses a method for producing a modified polypropylene having a maleic acid content of 1 to 15% by weight, which is obtained by reacting polypropylene, rubber, and maleic anhydride using a radical generator in the absence of a solvent. Disclosed.

JP-A No. 58-67743 discloses a modified polypropylene crosslinking agent partially or wholly grafted with an unsaturated carboxylic acid, and an organic peroxide whose 1-minute half-reduction degree is 10°C or more higher than the melting point of the modified polypropylene. A modified polypropylene consisting of

Further, JP-A-1-236214 discloses 100 parts by weight of a polyolefin resin (A) having a melt flow rate of 0.05 to 60 g/10 minutes, at least one selected from unsaturated carboxylic acids, derivatives thereof, and epoxy monomers. 0.1 to 5 parts by weight of one type of compound (B), 0.1 to 5 parts by weight of unsaturated aromatic monomer (C), and 0.1 to 5 parts by weight of radical initiator (D).
01 to 2 parts by weight, and the molar ratio of (B)/(0) or 0.1 mol or more and less than 1 mol of C) to 1 mol of (B) is melt-kneaded. Discloses a method for producing a modified polyolefin resin composition.

[Problem to be solved by the invention]

However, in these methods for producing modified polyolefins and modified olefin elastomers, a decomposition reaction of the main chain of the polyolefin proceeds simultaneously during the graft reaction, so there is a problem in that only low molecular weight modified products can be obtained. Also, maleic anhydride used for modification is a monomer or sublimable, and has a pungent odor.
It has been found that the workability during melt reaction is not always good. Furthermore, the modified polyolefin and modified olefin elastomer thus obtained have the problem that they are not necessarily satisfactory as compatibilizers because it is difficult to sufficiently increase the grafting rate of maleic anhydride and the like.

Therefore, it is conceivable to use glycidyl methacrylate having an epoxy group in addition to maleic anhydride as a modifying monomer, but since glycidyl methacrylate is a liquid, it has poor workability during melt reaction and is irritating. There are problems in that it causes odor, discoloration, etc., and the reaction efficiency is also poor.

Therefore, an object of the present invention is to provide a modified olefin elastomer that is suitable as a compatibilizer for various resin compositions, has a low molecular weight decrease due to graft polymerization, has a high grafting rate, and has good working efficiency during grafting reactions. An object of the present invention is to provide a manufacturing method.

[Means to solve the problem]

As a result of intensive research in view of the above objectives, the present inventors have discovered that a copolymer elastomer of ethylene and other common olefins can be modified in the presence of radicals using a specific glycidyl compound having an acrylamide group and an epoxy group. Ba,
The inventors have discovered that the above object can be achieved, and have devised the present invention.

That is, in the method for producing a modified olefin elastomer of the present invention, (a) 100 parts by weight of an olefin elastomer consisting of 5 to 95% by weight of ethylene and 95 to 5% by weight of a substitute olefin other than ethylene, (b) ) The following general formula: (wherein, 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 is 1 to 4.
represents an integer of 0.01 to
It is characterized by graft polymerizing 30 parts by weight to form a graft copolymer.

Another method for producing a modified olefin elastomer of the present invention is as follows: (a) (i) 20% by weight of an olefinic elastomer consisting of 5 to 95% by weight of ethylene and 95 to 5% by weight of α-olefin other than ethylene; (b) The following general formula: (wherein R is H or an alkyl group having 1 to 6 carbon atoms) can be,
Ar is an aromatic hydrocarbon group having at least one glycidyloxy group and having 6 to 20 carbon atoms, and n is an integer of 1 to 4.
Part by weight is graft-polymerized to obtain a graft copolymer.

The present invention will be explained in detail below.

The a1 olefin elastomer that can be used in the method of the present invention refers to ethylene, propylene, l-butene, 1-
It means a copolymer rubber with one or more toolefins other than ethylene, such as hexene and 4-methyl-pentene. 1 of the above ethylene and toolefins other than ethylene
Typical examples of copolymer rubbers include ethylene-butene copolymer rubber (EBR), ethylene-butene copolymer rubber (EBR), and ethylene-butene copolymer rubber (EBR).
Examples include propylene copolymer rubber (EPR) and ethylene-propylene-diene copolymer rubber (EPDM). Ethylene-propylene-diene copolymer (EPDM
), dicyclopentadiene, 1,4
- Non-conjugated dienes such as hexadiene, cyclooctadiene, methylene norbornene or conjugated dienes such as butadiene, isoprene, etc. can be used.

The content of ethylene in the above-mentioned reflex elastomer is 5 to 95% by weight, preferably 10 to 90% by weight. Ethylene content is less than 5% by weight or 95% by weight
If it exceeds % by weight, it becomes difficult to express the properties as an elastomer. The crystallinity of such a reflex elastomer is usually 40% by weight or less.

The ethylene-propylene copolymer rubber (EPR) used in the present invention has a content of repeating units derived from ethylene of 50 to 80 mol% and a content of repeating units derived from propylene of 20 to 50 mol%. It is preferable that A more preferable range is 60 to 70 mol% of the ethylene repeating unit and 30 to 40 mol% of the propylene repeating unit.

In addition, EPR melt flow rate (MFR, 230”
C12, 16 kg load) is preferably within the range of 0.01 to 50 g/10 minutes, more preferably 0.5 to 3
0 g/10 minutes.

The ethylene-butene copolymer rubber (EBR) used in the present invention has a content of repeating units derived from ethylene of 50 to 90 mol% and a content of repeating units derived from butene of 10 to 50 mol%. It is preferable that More preferable ranges are 60 to 80 mol% for ethylene repeating units and 20 to 40 mol% for butene thread repeating units.
It is mole%.

Also, EBR melt flow rate) (VFR, 230
°C, 2.16 kg load) is 0. It is preferably within the range of O1 to 50g/10 minutes, more preferably 0.5 to 3
0 g/10 minutes.

Furthermore, ethylene-propylene- used in the present invention
The diene copolymer (EPDM) has a content of repeating units derived from ethylene of 40 to 70 mol%, a content of repeating units derived from propylene of 30 to 60 mol%, and a repeating unit derived from diene. It is preferable that the content of units is 1 to 10 mol%. A more preferable range is 50 to 60 mol% of ethylene yarn repeating units;
40 to 50 mol% of propylene thread repeating units and 3 to 6 mol% of diene thread repeating units.

Furthermore, the melt flow rate (MFR, 23
0°C12, 16kg load) is 0. O1~50g/10
Preferably, it is within the range of 0.1 minutes, more preferably 0.1 minutes.
~30g710min.

Ethylene-propylene copolymer (EPR), ethylene-butene copolymer rubber (EBR) used in the present invention
and ethylene-propylene-diene copolymer (EPDM
) consists essentially of the above-mentioned repeating units or is derived from other α-olefins, such as 4-methylpentene-1, to the extent that the properties of these copolymers are not impaired. Other repeating units such as repeating units may be included up to a proportion of 10 mol% or less.

In the present invention, an olefin elastomer composition in which (i) the olefin elastomer described above is mixed with (2) polypropylene and/or polyethylene can also be used.

Polypropylene that can be used in the method of the present invention is not limited to homopolymers of propylene, but includes block copolymers or random copolymers of propylene and ethylene. In the case of copolymers, the ethylene content is below 10% by weight. Such polypropylene resin usually has a molecular weight of 0.5 to 80
g/10m1n melt flow rate) (MFR, Jr.
SK7210, load 2.16kg, 230"C).

The polyethylene that can be used in the method of the present invention has a melt flow rate of 0.1 to 50 g/10 minutes, a density (ASTM
D1505) or 0.970 to 0.885 g/c#, and may be copolymerized with about 20% by weight or less of other α-olefins. Examples of such polyethylene include low-density polyethylene, linear low-density polyethylene, and high-density polyethylene, and high-density polyethylene is particularly preferred. High density polyethylene is usually 0.1
~50g/10min melt index (ML load 2.
16kg, 190°C), and 0.94~0°97g
It has a density of no.

When polypropylene and/or polyethylene are mixed, the amount to be mixed is 80% by weight or less, preferably 50% by weight or less, based on 100% by weight of the olefin elastomer. If the amount of polypropylene and/or polyethylene mixed exceeds 80% by weight, the properties as an elastomer will be lost.

Furthermore, the monomer for bl modification that can be used in the method of the present invention has the following general formula (1): (wherein 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 is 1 to 4.
It is a glycidyl compound represented by (representing an integer of ).

Preferred glycidyl compounds have the following general formula (
2) can be mentioned.

(In the formula, R is H or an alkyl group having I to 6 carbon atoms,
n represents an integer of 1 to 4. ) Such glycidyl compounds are disclosed in, for example, JP-A-60-1
As shown in No. 30580, it can be manufactured by the following method.

First, an aromatic hydrocarbon having one or more phenolic hydroxyl groups and an alkyl ether derivative of N-methylol acrylamide or N-methylol methacrylamide, or an alkyl ether derivative of N-methylol methacrylamide (
Hereinafter, these are referred to as N-methylolacrylamides) by condensing with an acid catalyst, the following general formula (3) (wherein Rl;!H or an alkyl group having 1 to 6 carbon atoms, Ar' is a hydroxyl group is an aromatic hydrocarbon group having at least one carbon number from 6 to 20, and n represents an integer from 1 to 4.) is produced.

Is there any particular restriction on the aromatic hydrocarbon having at least one phenolic hydroxyl group? For example, phenol, 0-cresol, m-cresol, p-cresol, 2,6-xylenol, 2,4-xylenol,
- Phenolic compounds such as chlorophenol, m-chlorophenol, 0-phenylphenol, p-chlorophenol, 2゜6-diphenylphenol, polyphenolic compounds such as hydroquinone, catechol, phloroglucinol, 1-naphthol, 2- naphthol, 9
Examples thereof include polycyclic hydroxy compounds such as -hydroxyanthracene, bisphenols such as 2,2-bis(4-hydroxyphenyl)propane (bisphenol-A), and bis(4-hydroxyphenyl)methane.

Next, by glycidylating the hydroxyl group of the compound represented by the above general formula (3), a glycidyl compound represented by the general formula (1) can be obtained.

This glycidylation is preferably carried out by carrying out an addition reaction between the compound represented by the general formula (3) and shrimp halohydrin, followed by dehydrohalogenation with a caustic alkali.

The addition reaction with shrimp halohydrin is carried out using a phase transfer catalyst.

As the shrimp halohydrin, epichlorohydrin, shrimp bromohydrin, shrimp iodohydrin, etc. can be used.

Examples of phase transfer catalysts include quaternary ammonium salts such as tetrabutylammonium bromide, trioctylmethylammonium chloride, and benzyltriethylammonium chloride; quaternary phosphonium salts such as tetraphenylphosphonium chloride and triphenylmethylphosphonium chloride; A quaternary arsonium salt or the like may also be used.

The amount of the phase transfer catalyst used is 0.01-100 mol%, with the compound represented by general formula (3) being 100 mol%.
It is preferable to use it within the range of . A particularly preferred amount of phase transfer catalyst used is 0.05 to 10 mol%.

In addition, the reaction time and reaction temperature are 50 to 120℃ for 5 minutes to 2
The time is preferably 10 to 30 minutes at 80 to 110°C.

Subsequently, dehydrohalogenation is performed using caustic alkali.

As the caustic alkali, caustic soda, caustic potash, lithium hydroxide, etc. can be used. These can be used as solids or as aqueous solutions. Further, as a catalyst for dehydrohalogenation, the same one as the above-mentioned phase transfer catalyst can be used. Catalysts other than the phase transfer catalysts mentioned above include crown ethers, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, and the like.

The amount of the caustic alkali to be used is preferably equimolar to the compound represented by the general formula (3). More preferably, 1.1 to 1.5 times the mole is used. Moreover, the reaction time and reaction temperature are 10 minutes to 3 hours at 20 to 90°C, more preferably 30 minutes to 2 hours at 40 to 70°C.

Modification (graft polymerization) of an olefin elastomer (olefin elastomer composition) with such a glycidyl compound can be carried out by either a solution method or a melt mixing method. In the case of the melt mixing method, the olefin elastomer, the above-mentioned glycidyl compound for modification, and a catalyst if necessary are put into an extruder or twin-screw kneader, etc.
0.1~ while melting by heating to a temperature of 80~300℃
Knead for 20 minutes. In the case of a solution method, the starting material is dissolved in an organic solvent such as xylene, and the solution is stirred at a temperature of 90 to 200° C. for 0.1 to 100 hours. In either case, a normal radical polymerization catalyst can be used as a catalyst, such as benzoyl peroxide, lauroyl peroxide,
Ditertiary-butyl peroxide, acetyl peroxide, tertiary-butylperoxybenzoic acid, dicumyl peroxide, peroxybenzoic acid, peroxyacetic acid, tertiary-butylperoxypivalate, 2,5-dimethyl-2,5-
Peroxides such as ditertiary-butylperoxyhexine and diazo compounds such as azobisisobutyronitrile are preferred. The amount of the catalyst added is about 0.1 to 10 parts by weight per 100 parts by weight of the modified glycidyl compound.

In the present invention, a phenolic antioxidant may be added during the graft reaction. However, if a radical polymerization catalyst is not added, it is preferable not to add it.

The blending ratio of the glycidyl compound (b) is the same as (a) above.
The amount is 0.01 to 30 parts by weight, preferably 0.1 to 10 parts by weight, per 100 parts by weight of the olefin elastomer (olefin elastomer composition). If the amount of the glycidyl compound is less than 0.01 parts by weight, it is difficult to achieve a high grafting rate, and if it exceeds 30 parts by weight, the molecular weight of the modified olefin elastomer obtained will decrease.

The modified olefin elastomer (graft copolymer) obtained in this way has an extremely small reduction rate in molecular weight. This makes it possible to obtain a modified olefin elastomer with a high molecular weight that cannot be obtained by conventional methods. Furthermore, the glycidyl compound used in the method of the present invention does not produce an irritating odor during modification, and does not discolor as occurs when modified with maleic anhydride or the like.

[For production]

In the method for producing modified olefin elastomer 〇 of the present invention, an olefin elastomer is modified in the presence of radicals using a specific glycidyl compound having an acrylamide group and an epoxy group.

Therefore, it is suitable as a compatibilizer for various resin compositions, has a low molecular weight drop due to graft polymerization, has a high grafting rate, and does not produce an irritating odor during modification.

The reason why such an effect is obtained is not necessarily clear, or a specific glycidyl compound is used as a modifying monomer, and this glycidyl compound is
The monomer has an acrylamide group at one end and an epoxy group at the other end, and also has a benzene ring, so it has excellent reactivity, heat resistance, and other properties. This is thought to be due to the modification of the olefin elastomer.

〔Example〕

The present invention will be explained in further detail by the following specific examples.

In addition, in each Example and Comparative Example, the following materials and additives were used.

[11 Olefin elastomer/ethylene-butene copolymer rubber: EBR [butene content 80%, melt flow rate (230°C, 2,1
6kg load') 1.5 g/10 minutes] Ethylene-propylene copolymer rubber: EPR [Propylene content 7
0%, melt flow rate (230°C, 2,16kg
Load) 1.7 g/10 minutes] [21 Modifying monomer/AXE: Glycidyl compound represented by the following general formula [
Manufactured by Kanebuchi Kagaku Kogyo ■ MAH: Maleic anhydride GMA nigericidyl methacrylate [31 radical generator pox: Perhexine 2-5B (manufactured by NOF ■)]
Examples 1 to 6, Comparative Examples 1 to 5 Olefin elastomers, various modifying monomers shown in Table 1, and radical generators in amounts shown in Table 1 were triblended using a Henschel mixer, and then Lab blast mill, 200°C, 15 minutes, 80r
Graft polymerization was carried out by melt-kneading at pm.

In Example 6, as an olefin elastomer composition, 80 parts by weight of ethylene-propylene copolymer rubber and 2 parts of high-density polyethylene (manufactured by Tonen Petrochemical Co., Ltd., B6140) were used.
This is an example in which a mixture with 0 parts by weight is used.

The melt flow rate of the modified olefin elastomer thus obtained and the grafting rate of the modifying monomer were measured.

The results are also shown in Table 1.

In addition, 50 parts by weight of this modified olefin elastomer,
Polybutylene terephthalate (PBT: manufactured by Teijin ■, T
RB-K) and 50 parts by weight in a Labo Plastomill, 200
Graft polymerization was carried out by melt-kneading at 30 rpm for 5 minutes at °C.

The grafting ratio of polybutylene terephthalate in the obtained modified olefin elastomer/polybutylene terephthalate kraft copolymer was measured.

The results are also shown in Table 1.

This is the value measured by.

(1) MFR: JIS K7210 (2) No evaluation of irritating odor: No irritating odor.

Yes: There is a pungent odor.

Strong: Strong irritating odor.

Evaluated by.

(3) Grafting ratio of modifying monomer: ■For AXE: After dissolving modified polypropylene in boiling xylene and removing insoluble components, the dissolved components are precipitated with methanol, and this is pressed to a thickness of about 50 IxrI. The IR spectrum was measured, and the calculation was made from the ratio of the C=O bond expansion/contraction peak of AXE (1648an-') and one of the peaks (840an-') characteristic of Aitu Tactical PP.

■For MAR: Press the modified polypropylene to a thickness of about 50x, measure the IR spectrum, and find the peak of expansion and contraction of the C=0 bond of maleic anhydride (1780an-') and the peak unique to Aitu Tactical PP. One of the (84
0an-').

■For GMA: Press modified polypropylene to a thickness of about 50 uM, measure the IR spectrum, and measure the expansion and contraction peak of the glycidyl group of glycidyl methacrylate (115
It was calculated from the ratio of 0an-') and one of the peaks (840cm-') characteristic of Aitsu Tactical PP.

(4) Grafting ratio of polybutylene terephthalate: The modified olefin elastomer/polybutylene terephthalate graft copolymer was ground to a particle size of 0°246 rum or less, extracted with metacresol at 120°C, and unreacted polybutylene terephthalate was extracted. Removed. After that, the remaining sample was press-molded to a thickness of 50 to 100 mm.
A film of 700, 1504, 1580 an-'
), the content was calculated using the following formula.

As is clear from Table 1, the modified olefin elastomer produced by the production method of the present invention had a small increase in melt flow rate after modification, was able to increase the grafting ratio of the modifying monomer, and had no irritating odor. . Furthermore, the grafting rate when polybutylene terephthalate was graft copolymerized to this modified olefin elastomer was also high.

On the other hand, the modified olefin elastomers of Comparative Examples 1 to 5, in which the olefin elastomers were modified using maleic anhydride or glycidyl methacrylate as the modifying monomer, had a low grafting rate of the modifying monomer and had a pungent odor. was. Furthermore, when polybutylene terephthalate was graft copolymerized, the grafting rate was low.

Furthermore, when the modified olefin elastomer of each comparative example is used as a graft copolymer, the graft ratio is low because
This is thought to be due to the low grafting rate of the modifying monomer of the modified olefin elastomer itself.

Further, the value of the melt flow rate is usually correlated with the molecular weight, and it can be inferred that the larger the value, the lower the molecular weight.

〔Effect of the invention〕

In the method of the present invention, an olefinic elastomer is modified in the presence of radicals using a specific glycidyl compound having an acrylamide group and an epoxy group.

Therefore, it is suitable as a compatibilizer for various resin compositions, has little molecular weight reduction due to graft polymerization, has a high grafting rate, and has a high grafting rate when the resulting modified product is graft-polymerized with a different type of polymer. is high;
This modified olefin elastomer has no irritating odor during the graft reaction and has good work efficiency.

Such a modified olefin elastomer of the present invention is
It is suitable as a compatibilizer added to resin compositions for automobile parts, home appliance parts, industrial material parts, packaging materials, etc., and as an adhesive for metals.

Applicant Tonen Co., Ltd. % formula % l Display of the case 1990 Patent Application No. 128923 2 Name of the invention Process for producing modified olefin elastomer 3 Relationship with the person making the amendment Patent applicant name Name Tonen Co., Ltd. 4 Sub-agent resident Address: 2nd Floor, Castle Well Building, 1-8-10 Iidabashi, Chiyoda-ku, Tokyo Date: 6 Heisei Date of Amendment (1) Specification subject to amendment (1) Page 8, lines 18 to 19 of the specification, page 10, line 14 of the same Lines 15 to 15 and page 11, lines 10 to 1
One line of “ethylene-propylene-diene copolymer (EP)
DM) J is corrected to "ethylene-propylene-diene copolymer rubber (EPDM) J.

(2) "Ethylene propylene copolymer (EPR) J" on page 11, lines 8 to 9 of the specification is corrected to "ethylene-propylene copolymer rubber (EPR) J."

(3) "Melt flow rate" on page 12, lines 9 and 10 of the specification is changed to "melt index (ML load 2.
16kg, 190℃)”.

(4) Add "." after "n represents an integer from 1 to 4" on page 13, line 12 of the specification.

(5) "It is an alkyl group, and n represents an integer from 1 to 4." on page 14, line 1 to line 2 of the specification is replaced with "[it is an alkyl group]." ” he corrected.

(6) "Equimolar amount" on page 17, line 14 of the specification is corrected to "equal molar amount or more" as j.

(7) "Modified polypropylene" on page 26, line 8, page 26, line 16, and page 27, line 2 of the specification is corrected to "modified olefin elastomer."

(8) Specification page 26, lines 13 to 15, page 26
``One of the peaks unique to Aitsu Tactical PP (calculated from the ratio to 840 cm-ri)'' in lines 19 to 1 of page 27 and lines 5 to 7 of page 27 is It was calculated from the ratio to the sample thickness.''

Claims (2)

[Claims] (1) (a) For 100 parts by weight of an olefin elastomer consisting of 5 to 95% by weight of ethylene and 95 to 5% by weight of α-olefin other than ethylene, (b) the following general formula: ▲ Numerical formula, chemical formula, There are tables etc.▼ (In the formula, R is H or an alkyl group having 1 to 6 carbon atoms,
Ar is an aromatic hydrocarbon group having at least one glycidyloxy group and having 6 to 20 carbon atoms, and n is an integer of 1 to 4.
A method for producing a modified olefin elastomer, which comprises graft polymerizing parts by weight to obtain a graft copolymer. (2) (a) (i) 20% by weight or more of an olefinic elastomer consisting of 5 to 95% by weight of ethylene and 95 to 5% by weight of α-olefin other than ethylene, and (ii) 80% by weight of polypropylene and/or polyethylene. (b) The following general formula: ▲There are numerical formulas, chemical formulas, tables, etc.▼ (In the formula, R is H or an alkyl group having 1 to 6 carbon atoms. and
Ar is an aromatic hydrocarbon group having at least one glycidyloxy group and having 6 to 20 carbon atoms, and n is an integer of 1 to 4.
A method for producing a modified olefin elastomer, which comprises graft polymerizing parts by weight to obtain a graft copolymer.