JP3175308B2 - Thermoplastic elastomer composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic elastomer composition having excellent sheet processability. More specifically, the present invention relates to an olefin-based thermoplastic elastomer composition which has excellent calenderability and can be substituted for soft polyvinyl chloride, vulcanized rubber, or the like.

[0002]

2. Description of the Related Art Thermoplastic elastomers do not require a vulcanization step, and can be processed by ordinary thermoplastic resin molding machines. Applications have been developed in a wide range of fields. Among them, the olefin-based thermoplastic elastomer composition is known from JP-A-48-26838 and the like. On the other hand, conventionally, a molded product obtained by laminating a skin material on a thermoplastic resin molded product to enhance its aesthetic appearance and softness has been widely known. Soft polyvinyl chloride or olefin-based thermoplastic elastomer lined with a foamed layer of polyurethane resin or the like is used. However, the polyvinyl chloride skin material has a large specific gravity and is inferior in light resistance, and when used for the skin of a member exposed to direct sunlight, the surface appearance is significantly reduced. In addition, since it is softened by adding a large amount of a plasticizer, when used as an automobile interior material, there is a problem that a windshield or the like is fogged due to the influence of the plasticizer. Further, since polyvinyl chloride generates hydrochloric acid gas when burned due to its structure, there is a problem in that incineration of waste cannot be performed or various processing equipments are corroded on environmental hygiene. Further, when a conventional olefin-based thermoplastic elastomer is used as a skin material, although some of the above-mentioned problems of polyvinyl chloride are solved, the additive is separated from the thermoplastic elastomer composition and calender roll processing is performed. In addition, the so-called plate-out phenomenon, in which the surface is contaminated in embossing roll processing, and molding failure as a die-blend phenomenon in the T-die occurred, and further improvement has been demanded.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art and to provide an olefin-based thermoplastic elastomer composition having excellent sheet processability.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a plate-out preventing effect is exhibited by using a specific additive, and reached the present invention. That is, the present invention provides the following (1)
To (5). (1) 100 ° C Mooney viscosity (ML _{1 + 4} 100 ° C) is 30
Olefin copolymer rubber (A) 100
5 to 150 parts by weight of the olefin-based polymer (B), 0 to 150 parts by weight of the mineral oil-based softener (C), and a melting point of 80 parts by weight, and 100 parts by weight of the copolymer rubber (A).
10% loss on heat temperature be above ° C. is an additive (D) 0.05 to 2.5 parts by weight is 350 ° C. or more, the additive
A thermoplastic elastomer composition, wherein the agent (D) is a hindered amine compound . (2) 100 ° C Mooney viscosity (ML _{1 + 4} 100 ° C) is 30
Olefin copolymer rubber (A) 100
Partial cross-linking of a mixture comprising 5 to 150 parts by weight of an olefin polymer (B) and 0 to 150 parts by weight of a mineral oil-based softener (C) based on 100 parts by weight of the copolymer rubber (A) To 100 parts by weight of an additive, 0.01 to 2.4 parts by weight of an additive (D) having a melting point of 80 ° C. or higher and a 10% heat loss temperature of 350 ° C. or higher is added.
A thermoplastic elastomer composition, wherein the agent (D) is a hindered amine compound . (3) 100 ° C Mooney viscosity (ML _{1 + 4} 100 ° C) is 30
Olefin copolymer rubber (A) 100
5 to 150 parts by weight of the olefin-based polymer (B), 0 to 150 parts by weight of the mineral oil-based softener (C), and a melting point of 80 parts by weight, and 100 parts by weight of the copolymer rubber (A).
10% loss on heat temperature be above ° C. is an additive (D) 0.05 to 2.5 parts by weight is 350 ° C. or more, the additive
A mixture in which the agent (D) is a hindered amine compound is used.
A thermoplastic elastomer composition obtained by partial crosslinking . (4) Oil-extended olefin copolymer rubber (E) 40 to 95% by weight containing mineral oil-based softener (C) at 150 parts by weight or less per 100 parts by weight of olefin-based copolymer rubber (A).
And a olefin polymer (B) having a melting point of 80 ° C. with respect to 100 parts by weight of a partially crosslinked product of 5 to 60% by weight.
Or more are 10% heat loss temperature is from the additive (D) .01 to 2.4 parts by weight is 350 ° C. or more, the additive
A thermoplastic elastomer composition, wherein the agent (D) is a hindered amine compound . (5) 40 to 95% by weight of an oil-extended olefin-based copolymer rubber (E) containing 150 parts by weight or less of a mineral oil-based softener (C) per 100 parts by weight of the olefin-based copolymer rubber (A)
And a olefin polymer (B) having a melting point of 80 ° C. or more with respect to 100 parts by weight of a mixture comprising 5 to 60% by weight,
Additive (D) having a 10% heat loss temperature of 350 ° C. or more
0.01 to 2.4 parts by weight , wherein the additive (D)
Do not partially cross-link a mixture of
Thermoplastic elastomer composition characterized by that. Hereinafter, the present invention will be described in detail.

[0005] The olefin copolymer rubber constituting the olefin copolymer rubber (A) used in the present invention is:
For example, an olefin is a main component, such as an ethylene-propylene copolymer rubber, an ethylene-propylene-nonconjugated diene rubber, an ethylene-butene-1-nonconjugated diene rubber, and a propylene-butene-1 copolymer rubber. It is an amorphous random elastic copolymer. Among them, ethylene-propylene-non-conjugated diene rubber (hereinafter referred to as “EP
DM ". Is preferred. Examples of the non-conjugated diene include dicyclopentadiene, 1,4-hexadiene, cyclooctadiene, methylene norbornene, and ethylidene norbornene. As a more specific example, ethylene-propylene having a propylene content of 10 to 55% by weight, preferably 20 to 40% by weight, and a non-conjugated diene content of 1 to 30% by weight, preferably 3 to 20% by weight. Non-conjugated diene copolymer rubbers are preferred. If the propylene content is less than 10% by weight, flexibility is lost, and if it is more than 55% by weight, mechanical properties are undesirably deteriorated. If the non-conjugated diene content is less than 1%, the mechanical properties are reduced, and
If it is more than this, the moldability is undesirably reduced.

In the present invention, Mooney viscosity at 100 ° C. (ML _{1 + 4} 100 ° C.) of the olefin copolymer rubber (A)
Is preferably 30 to 350. 100 ° C Mooney viscosity (M
If (L 1 _{+ 4} 100 ° C.) is lower than 30, the mechanical properties are lost, and if it is higher than 350, the appearance of the molded article is undesirably deteriorated.

The preferred olefin polymer (B) used in the present invention is a copolymer of polypropylene or propylene with an α-olefin having 2 or more carbon atoms. Specific examples of the α-olefin having 2 or more carbon atoms include ethylene, 1-butene, 1-pentene, 3
-Methyl-1-butene, 1-hexene, 1-decene, 3
-Methyl-1-pentene, 4-methyl-1-pentene,
1-octene and the like. The melt flow rate of these polymers is from 0.1 to 100 g / 10 minutes, preferably from 0.1 to 100 g / 10 minutes.
The range is 5 to 50 g / 10 minutes. If the melt flow rate is smaller than 0.1 g / 10 min or larger than 100 g / 10 min, there is a problem in workability.

[0008] Next, the mineral oil softener (C) used in the present invention is a high-boiling petroleum fraction blended for the purpose of improving processability and mechanical properties. Although a system or an aromatic system is used, a paraffin system is preferably used. An increase in the amount of the aromatic component is not preferable because the contamination becomes strong and the light resistance also decreases.

In the present invention, (E) the oil-extended olefin-based copolymer rubber is 150 parts by weight or less, preferably 20 to 150 parts by weight, of the mineral oil-based softener (C) per 100 parts by weight of the copolymer rubber (A). Parts, more preferably 30 to 120 parts by weight. 100 ° C of copolymer rubber (A)
When the Mooney viscosity (ML _{1 + 4} 100 ° C.) is relatively large, the fluidity of the elastomer composition is low when the mineral oil-based softener (C) is not added, and especially extrudability and injection moldability are impaired. . On the other hand, if the amount is more than 150 parts by weight, the plasticity is remarkably increased and the processability is deteriorated, and furthermore, the performance such as physical properties of the product is deteriorated, which is not preferable. The oil-extended olefin copolymer rubber (E) 1
The 00 ° C Mooney viscosity (ML _{1 + 4} 100 ° C) is preferably 30 to 150, more preferably 40 to 100.
If it is lower than 30, mechanical properties are lost, and if it is higher than 150, molding tends to be difficult.

Next, the properties and production method of the oil-extended olefin copolymer rubber (oil-extended EPDM) will be described using EPDM as an example. ML _{1 + 4} 100 ° C. is relatively high at 80 to 350, and a large amount of a mineral oil-based softener is blended with EPDM to improve flexibility, improve workability by improving fluidity, and improve mechanical properties. Can be obtained at the same time. Generally, a mineral oil-based softener is used as a fluidity improver in an olefin-based elastomer composition. However, according to a study by the present inventors, when oil-extended EPDM is not used, mineral oil per 100 parts by weight of EPDM is used. 40 oil-based softeners
If it is added in an amount of not less than part by weight, bleeding of the softening agent is liable to occur on the surface of the elastomer composition, and contamination and adhesion of the product are not preferred. However, for example, when ML _{1 + 4} 100 ° C. is 8
Oil-extended EPD in which no more than 150 parts by weight of a mineral oil-based softener per 100 parts by weight of EPDM of 0 to 350 are previously blended
When M is used, it is possible to obtain an elastomer composition having little bleeding of the softening agent, no contamination or sticking of the product, and excellent physical properties such as breaking strength, breaking elongation and compression set. Despite the fact that the blending ratio of the mineral oil-based softener is large, no bleeding of the softener is observed because EPDM having a relatively high Mooney viscosity means that the upper limit of the allowable oil spreading amount of the mineral oil-based softener is limited. It is believed that the ascent and that the softener previously suitably added is uniformly dispersed in the EPDM.

A known method is used for the oil extension method of EPDM. For example, using a device such as a roll or a Banbury mixer, a method of oil-extending by a method of mechanically kneading EPDM and a mineral oil-based softener, or adding a predetermined amount of a mineral oil-based softener to an EPDM solution, and thereafter And a method obtained by removing the solvent by a method such as steam stripping.
Among these, a preferred oil-extension method is a method using an EPDM solution, and the EPDM solution is obtained by polymerization using an EPDM solution.
The operation is easier if a solution is used.

The additive (D) used in the present invention is
Melting point is 80 ° C or more and 10% loss on heating is 350 ° C
With the above additives for polymersHindered amine
Additives that are compoundsSay. Specific examples andThe poly
｛[6- (1,1,3,3-tetramethylbutylimi
G) -1,3,5-triazine-2,4-diyl] [4
-(2,2,6,6-tetramethylpiperidinyl) -i
Mino]-[4-2,2,6,6-tetramethylpiperidi
Nyl) -imino]}, poly {[6-morpholino-2,
4-diyl] [4- (2,2,6,6-tetramethylpi
Peridyl) iminohexamethylene] [4- (2,2,
6,6-tetramethylpiperidyl) imino]｝, 1,
1 '-(1,2-ethanediyl) bis (3,3,5,5
-Hindered amines such as tetramethylpiperazineone)
And the like.Above all, both ends2 pcs
Hindered amine compounds having a peridinyl group and
And / or two or more piperidinyl groups in the side chain.
Pendant amine compounds are preferred.

The amount of the additive (D) added is a mixture of 5 to 150 parts by weight of the olefin polymer and 0 to 150 parts by weight of the mineral oil-based softener per 100 parts by weight of the olefin copolymer rubber (A). 0.05 to 2.5 parts by weight, preferably 0.01
It can be selected in the range of up to 2.0 parts by weight. If the amount is less than 0.05 part by weight, the original effect of the additive such as an antioxidant effect and an ultraviolet ray preventing effect is small. It is not economically advantageous.

Preferably, the composition according to the present invention is partially crosslinked with, for example, an organic peroxide. Organic peroxides that partially cross-link a mixture of (A) an olefin-based copolymer rubber and (B) an olefin-based plastic include 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (t
-Butylperoxy) hexyne-3,1,3-bis (t
-Butylperoxyisopropyl) benzene, 1,1-
Di (t-butylperoxy) 3,5,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di (peroxybenzoyl) hexyne-3, dicumyl peroxide and the like. Among these, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane is particularly preferred in terms of odor and scorch.

The organic peroxide is added in an amount of 0.005 to 2.0 parts by weight, preferably 0.01 to 0.6 parts by weight, based on 100 parts by weight of the total of the olefin copolymer rubber and the olefin plastic.
It can be selected in the range of parts by weight. If the amount is less than 0.005 parts by weight, the effect of the crosslinking reaction is small, and if it exceeds 2.0 parts by weight, control of the reaction is difficult, and it is not economically advantageous. In producing the composition of the present invention, N, N′-m-phenylenebismaleimide, toluylenebismaleimide P-quinonedioxime, nitrobenzene, diphenylguanidine are used as crosslinking aids during dynamic crosslinking with an organic peroxide. Peroxide crosslinking aids such as trimethylolpropane, or divinylbenzene, ethylene glycol dimethacrylate,
Polyfunctional vinyl monomers such as polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and allyl methacrylate can coexist. By blending such a compound, a uniform and mild crosslinking reaction and a reaction between the olefin-based copolymer rubber and the olefin-based plastic occur, and it is possible to improve mechanical properties.

The addition amount of the crosslinking aid can be selected in the range of 0.01 to 4.0 parts by weight based on 100 parts by weight of the total of the olefin copolymer rubber and the olefin plastic.
Preferably it is 0.05 to 2.0 parts by weight. If the amount is less than 0.01 part by weight, the effect is hardly exhibited, and if it exceeds 4 parts by weight, it is not economically advantageous.

In the present invention, a specific production method for obtaining an elastomer composition by partially crosslinking the above mixture will be described below. A copolymer rubber (A), an olefin polymer (B), a mineral oil softener (C), an additive (D), an organic peroxide, and, if necessary, a crosslinking aid are mixed in a specific ratio. And heat-treat dynamically. That is, they are melted and kneaded. As the mixing and kneading apparatus, a non-open type Banbury mixer, a twin screw extruder, or the like is used. Kneading temperature is 150 ℃ ~ 300 ℃
It takes about 1 to 30 minutes. If necessary in the production method of this composition, auxiliary materials such as an inorganic filler, an antioxidant, a weathering agent, an antistatic agent and a coloring pigment can be blended. When the Mooney viscosity of the copolymer rubber (A) is relatively high, a preferable method is an oil-extended olefin copolymer rubber in which the copolymer rubber (A) and the mineral oil-based softener (C) are previously blended. (E), and then a mixture of the oil-extended olefin-based copolymer rubber (E), the olefin-based polymer (B) and the additive (D), and if necessary, a crosslinking aid and the above-mentioned auxiliary materials. , And after sufficiently kneading and homogenizing in a temperature range of 150 to 250 ° C using a Banbury mixer or the like of a non-opening type kneader, the obtained composition and an organic peroxide are tumbled or super-mixed. Blend thoroughly with an internal mixer such as Next, this blend is subjected to 200 to 30 using a twin-screw continuous extruder or the like capable of obtaining a strong kneading force.
It can be obtained by dynamically performing heat treatment at 0 ° C. The auxiliary materials can be incorporated at any stage of manufacturing the composition, at the time of processing or at the time of using the product after processing.

A method for molding the thus obtained elastomer composition as a skin material for industrial parts is exemplified below. Multilayer extrusion molding using the elastomer composition as a skin layer. Two-layer injection molding and insert molding using the elastomer composition as a skin material layer. A method in which the elastomer composition is formed into a sheet shape (multilayered with a polyolefin-based resin or a polyolefin-based foamed sheet, if desired) using a T-die sheet forming machine, followed by vacuum forming. Simultaneous molding of the sheet with polystock (mixture of resin / wood flour) or fiber reinforced plastic. Stamping of a sheet of plastic with plastic (optionally filled with inorganic filler).

The use of the skin material for industrial parts according to the present invention includes the following various industrial parts. For automotive parts, automotive instrument panels, console boxes, armrests, headrests, door trims,
Interior skin materials such as rear panel, pillar trim, sun buzzer, trunk room trim, trunk lid trim, airbag storage box, seat buckle, headliner, glove box, steering wheel cover, ceiling material and the like. For home appliances and OA equipment parts, TV, video, washing machine, dryer, vacuum cleaner, cooler, air conditioner, remote control case, microwave oven, toaster, coffee maker, pot, jar, dishwasher,
Electric razor, hair dryer, microphone, headphones, beauty equipment, CD / cassette storage box, personal computer, typewriter, projector, telephone,
Suitable for skin materials of housings for copy machines, facsimile machines, telexes, etc. In the sporting goods field, it is suitable for sports shoes decorative parts, rackets for various ball games, grips for sports equipment and supplies, saddle skin materials for bicycles, motorcycles and tricycles, and the like. In construction and housing parts, skin materials such as furniture, desks and chairs, skin materials such as gates, doors and fences,
Wall decoration materials, ceiling decoration materials, skin materials of curtain walls, indoor floor materials such as kitchens, washrooms, toilets, etc., indoor floor materials such as verandas, terraces, balconies, carports, etc.
Suitable for rugs such as entrance mats, tablecloths, coasters, and ashtrays. In other industrial parts, for example, grips and hoses for power tools and their skin materials,
Suitable for packing materials, etc. In addition, it is suitable for a cover material such as a bag, a case, a file, a notebook, an album, a stationery, a camera body, a doll, and other toys, an outer frame of a frame and its cover material.

[0020]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. In addition, the test method used for the physical property measurement in these Examples and Comparative Examples is as follows. (1) Mooney viscosity (ML _{1 + 4} 100 ° C.): Based on ASTM D927-57T. (2) Melt flow rate (MFR): based on JIS K-7210. (230 ° C) (3) Melting point and 10% loss on heating Equipment Name: Differential scanning calorimeter TG / DSC Standard type (Model) (TAS100 / TG8100) Manufacturer: Rigaku Corporation Measurement conditions Measurement temperature range Room temperature to room temperature 500 ° C. Heating rate 20 ° C./min Nitrogen atmosphere 100 ml / min Sample amount 10 mg (4) Plate-out test The thermoplastic elastomer was gelled with a 6-inch mixing roll at a set temperature of 145 ± 5 ° C. to form a band. Next, 5 parts by weight of a blue pigment was added, kneaded for 3 minutes, and the sheet was pulled out. Further, a soft vinyl chloride resin compound to which 50 parts by weight of a plasticizer was added was kneaded for 3 minutes, and a sheet was drawn out. The shade of blue of this sheet was visually observed to determine the degree of plate-out.

Example 1 EPDM [non-conjugated diene = ethylidene norbornene (E
NB)], iodine value = 10, propylene = 30% by weight,
ML _{1 + 4} 100 ° C. = 143] in a 5% by weight hexane solution, 100 parts by weight of a mineral oil-based softening agent (Idemitsu Kosan, Diana Process Oil PW-380) is added per 100 parts by weight of EPDM, followed by steam stripping. 70 parts by weight of desolvated oil-extended EPDM (ML _{1 + 4} 100 ° C. = 78), 30 parts by weight of polypropylene-1 (MFR = 1.3 g / 10 min, ethylene = 4.5% by weight, random type) and crosslinking aid 0.2 parts by weight of N, N'-m-phenylenebismaleimide (Sumitomo Chemical Co., Ltd., Sumifine BM) was kneaded with a Banbury mixer at 170 to 200 ° C. for 7 minutes, and then pelletized using an extruder. A batch was made. Next, 0.04 parts by weight of 2,5-dimethyl-2,5-di (t-butylperoxy) hexane (hereinafter referred to as “organic peroxide”) per 100 parts by weight of the master batch.
Was uniformly blended for 3 minutes using a Henschel mixer. This blend was subjected to dynamic heat treatment at 240 to 260 ° C. for about 30 seconds using a twin-screw kneading extruder (Tex-44HC, Japan Steel Works) to obtain thermoplastic elastomer pellets. The thermoplastic elastomer pellets are roll-kneaded to form a band, and
44 [poly {[6- (1,1,3,3-tetramethylbutylimino) -1,3,5-triazine-2,4-diyl]] [4- (2,2,6,6-tetramethyl Piperidinyl) -imino]-[4-2,2,6,6-tetramethylpiperidinyl) -imino]}, manufactured by Ciba-Geigy, melting point 100-135 ° C, 10% loss on heating at 427 ° C] To
After adding 0.4 parts by weight and kneading for 3 minutes, then adding 5 parts by weight of blue pigment and kneading for 3 minutes, the sheet was pulled out. No contamination was observed on the surface of the roll. Subsequently, a soft vinyl chloride resin compound was kneaded to obtain a sheet, but the sheet maintained its original transparency and no coloring was observed.

COMPARATIVE EXAMPLE 1 Tinuvin 622 (4) was used in place of Chimosorb 944 as an additive.
-Hydroxy-2,2,6,6-tetramethyl-1-piperidine Polyester of ethanol and succinic acid, manufactured by Ciba-Geigy, melting point 138 ° C., 10% weight loss temperature 3
The test was performed in exactly the same manner as in Example 1 except that the temperature was 47 ° C.). After adding the pigment and kneading for 3 minutes, the roll surface was colored blue. In addition, the sheet of the soft vinyl chloride resin compound exhibited a remarkable blue tint.

Example 2 Thermoplastic elastomer pellets were obtained in the same manner as in Example 1, except that 0.4 part by weight of Chimosorb 944 was added to the pelletized master batch. The thermoplastic elastomer is roll-kneaded to form a band, and then the SANOL L
S770 [bis (2,2,6,6-tetramethyl-4-
Piperidinyl) sebacate, manufactured by Sankyo, melting point: 83 ° C, 10
% Loss on heating at 294 ° C.] was conducted in exactly the same manner as in Example 1 and Comparative Example 1 except that 0.4 part by weight was used. No contamination was found on the roll surface or the soft vinyl chloride resin compound sheet.

Comparative Example 2 Thermoplastic elastomer pellets were obtained in the same manner as in Comparative Example 1 except that 0.4 part by weight of Tinuvin 622 was added to the pelletized master batch. A plate-out test was performed using this thermoplastic elastomer in the same manner as in Example 2. The roll surface and the sheet of soft vinyl chloride resin compound were significantly contaminated.

EXAMPLE 3 0.4 parts by weight of Chimosorb 944, Irganox 101
0 (manufactured by Ciba Geigy, melting point: 114 ° C., 10% weight loss by heating: 370 ° C.): 0.1 part by weight, Ultranox 626
0.1 parts by weight (manufactured by BorgWarner, melting point 162 ° C, 10% weight loss temperature 216 ° C), Goodlight 3114 (Goodrich, melting point 220 ° C, 10% weight loss temperature 3)
Thermoplastic elastomer pellets were obtained in the same manner as in Example 1, except that 0.1 part by weight (55 ° C.) was added to the pelletized master batch. The thermoplastic elastomer was roll-kneaded to form a band, 5 parts by weight of a blue pigment was added and kneaded for 3 minutes, and the sheet was pulled out. Next, the soft vinyl chloride resin compound was kneaded for 3 minutes and the sheet was pulled out. No contamination was observed on the roll surface and the sheet of the soft vinyl chloride resin compound after the pigment kneading.

Comparative Example 3 0.4 part by weight of Chimosorb 944 was added to Tinuvin 622 0.4
A plate-out test was performed in the same manner as in Example 3 except that the weight was changed to parts by weight. Significant contamination was observed on the roll surface and the soft vinyl chloride resin compound sheet.

[0027]

As described above, according to the present invention, it is possible to provide a thermoplastic elastomer composition having an improved plate-out phenomenon and the like in roll processing.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Tsumori 5-1, Anesaki Beach, Ichihara-shi, Chiba Sumitomo Chemical Co., Ltd. (72) Inventor Yasuji Yamashita 5-1, Anesaki Beach, Ichihara-shi, Chiba Sumitomo Chemical Industrial Co., Ltd. In-house (56) References JP-A-3-294343 (JP, A) JP-A-3-292342 (JP, A) JP-A-2-60951 (JP, A) (58) Fields investigated (Int. . ^7, DB name) C08L 23/02 - 23/22 C08K 5/01 C08K 5/17

Claims (9)

(57) [Claims] 1. Mooney viscosity at 100 ° C. (ML _{1 + 4} 100 ° C.)
(A) is an olefin-based copolymer rubber having a molecular weight of 30 to 350
Based on 100 parts by weight and 100 parts by weight of the copolymer rubber (A), 5 to 150 parts by weight of the olefin-based polymer (B), 0 to 150 parts by weight of the mineral oil-based softener (C), and a melting point of 80 10% loss on heat temperature be above ° C. is an additive (D) 0.05 to 2.5 parts by weight is 350 ° C. or higher,
A thermoplastic elastomer composition, wherein the additive (D) is a hindered amine compound . 2. Mooney viscosity at 100 ° C. (ML _{1 + 4} 100 ° C.)
(A) is an olefin-based copolymer rubber having a molecular weight of 30 to 350
100 parts by weight, and a portion of a mixture comprising 5 to 150 parts by weight of the olefin-based polymer (B) and 0 to 150 parts by weight of the mineral oil-based softener (C) based on 100 parts by weight of the copolymer rubber (A) The melting point is 80 ° C. with respect to 100 parts by weight of the crosslinked product.
Or more are 10% heat loss temperature is by adding an additive (D) 0.01 to 2.4 parts by weight is 350 ° C. or higher, the
A thermoplastic elastomer composition, wherein the additive (D) is a hindered amine compound . 3. Mooney viscosity at 100 ° C. (ML _{1 + 4} 100 ° C.)
(A) is an olefin-based copolymer rubber having a molecular weight of 30 to 350
Based on 100 parts by weight and 100 parts by weight of the copolymer rubber (A), 5 to 150 parts by weight of the olefin-based polymer (B), 0 to 150 parts by weight of the mineral oil-based softener (C), and a melting point of 80 10% loss on heat temperature be above ° C. is an additive (D) 0.05 to 2.5 parts by weight is 350 ° C. or higher,
A mixture in which the additive (D) is a hindered amine compound
A thermoplastic elastomer composition obtained by partially cross-linking a product. 4. An oil-extended olefin-based copolymer rubber (E) containing 40 to 95 parts by weight of a mineral oil-based softener (C) per 100 parts by weight of the olefin-based copolymer rubber (A).
% By weight and 100 parts by weight of a partially crosslinked product of a mixture of the olefin polymer (B) and 5% by weight of an additive having a melting point of 80 ° C. or more and a 10% heat loss temperature of 350 ° C. or more ( D) consisting of 0.01 to 2.4 parts by weight ,
A thermoplastic elastomer composition, wherein the additive (D) is a hindered amine compound . 5. An oil-extended olefin copolymer rubber (E) containing from 50 to 95 parts by weight of a mineral oil-based softener (C) per 100 parts by weight of the olefin-based copolymer rubber (A).
Additive (D) having a melting point of 80 ° C. or more and a 10% heat loss temperature of 350 ° C. or more with respect to 100 parts by weight of a mixture composed of 5% by weight and 5 to 60% by weight of an olefin polymer (B). 0.01 to 2.4 parts by weight of the additive
Part of the mixture wherein (D) is a hindered amine compound
A thermoplastic elastomer composition obtained by crosslinking . 6. A hindered amine compound having two terminals at both ends.
A hindered amine compound having two piperidinyl groups and / or a hindered amine compound having two or more piperidinyl groups in a side chain .
A thermoplastic elastomer composition according to claim 1 . 7. The olefin copolymer rubber (A) is an ethylene-propylene-nonconjugated diene copolymer rubber having a propylene content of 10 to 55% by weight and a non-conjugated diene content of 1 to 3% by weight. In one of claims 1 to 6,
The thermoplastic elastomer composition as described in the above . 8. An oil-extended olefin copolymer rubber (E) 1
00 ° C Mooney viscosity (ML _{1 + 4} 100 ° C) 30-150
The thermoplastic elastomer composition according to claim 4 or 5, wherein 9. olefin polymer (B) is claimed is polypropylene or propylene -α- olefin copolymer
The thermoplastic elastomer composition according to any one of items 1 to 8 .