JP3053233B2 - Radiation resistant composition - Google Patents
Radiation resistant compositionInfo
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- JP3053233B2 JP3053233B2 JP3050461A JP5046191A JP3053233B2 JP 3053233 B2 JP3053233 B2 JP 3053233B2 JP 3050461 A JP3050461 A JP 3050461A JP 5046191 A JP5046191 A JP 5046191A JP 3053233 B2 JP3053233 B2 JP 3053233B2
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、高レベルの放射線に対
して物性の変化が少なく、且つ引張特性、耐熱性、加工
性等が良好な耐放射線性組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation-resistant composition which exhibits little change in physical properties with respect to high-level radiation and has good tensile properties, heat resistance, workability and the like.
【０００２】[0002]
【従来の技術・発明が解決しようとする課題】ウラン濃
縮施設、放射性廃棄物処理施設、使用済燃料再処理施設
等に於いては、大量の放射性物質を化学的に処理しなけ
ればならず、原子力発電所と比較しても、高濃度の放射
線量となる管理区域が多い。このような管理区域で使用
される各種材料は、耐放射線性が要求される。例えばケ
ーブル材料では、800 〜1000Ｍradの線量に耐え得る材
料が要求される。しかしながら、このような強放射線に
耐える有機材料は皆無に等しかった。そこで本発明者ら
は、耐放射線性に優れ、且つ引張特性、耐熱性、加工性
等が良好な有機材料組成物の開発を目的とした。2. Description of the Related Art In uranium enrichment facilities, radioactive waste treatment facilities, spent fuel reprocessing facilities, etc., a large amount of radioactive materials must be chemically treated. Compared to nuclear power plants, there are many controlled areas with high radiation levels. Various materials used in such controlled areas are required to have radiation resistance. For example, in the case of cable materials, materials that can withstand a dose of 800 to 1000 Mrad are required. However, no organic material could withstand such strong radiation. Then, the present inventors aimed at developing an organic material composition which is excellent in radiation resistance and excellent in tensile properties, heat resistance, workability and the like.
【０００３】[0003]
【課題を解決するための手段】前記目的を達成するため
に、本発明者らが鋭意研究を重ねた結果、特定の沃素価
を有するエチレン−プロピレン−ジエンゴム（以下、エ
チレン−プロピレン−ジエンゴムを「ＥＰＤＭ」とい
う。）およびプロセス油が配合されてなる有機材料組成
物が、さらに老化防止剤が配合されてなる上記有機材料
組成物が、耐放射線性に優れ、高レベルの放射線に対し
て物性の変化が少なく、且つ引張特性、耐熱性、加工性
等が良好であることを見出し、本発明を完成するに到っ
た。即ち、本発明の耐放射線性組成物は、沃素価が１〜
10のＥＰＤＭおよびプロセス油が配合されてなり、好ま
しくはさらに、老化防止剤が配合されてなることを特徴
とするものである。Means for Solving the Problems In order to achieve the above object, the present inventors have conducted intensive studies and as a result, have found that ethylene-propylene-diene rubber having a specific iodine value (hereinafter referred to as "ethylene-propylene-diene rubber"). EPDM ”) and an organic material composition containing a process oil, and an organic material composition further containing an antioxidant has excellent radiation resistance and physical properties against high levels of radiation. The inventors have found that there is little change and that the tensile properties, heat resistance, workability, and the like are good, and have completed the present invention. That is, the radiation-resistant composition of the present invention has an iodine value of 1 to 1.
It is characterized by comprising 10 EPDM and process oil, and preferably further comprising an antioxidant.
【０００４】本発明で使用されるＥＰＤＭは、沃素価が
１〜10のもので、適当な配合処方で押出可能なものであ
れば特に限定されないが、ムーニー粘度〔ML１＋４(100
℃）〕が35〜80（特に35〜60）、エチレン量が50〜85％
（特に60〜82）のものが好ましい。沃素価を１〜10に限
定した理由は、沃素価が１未満の場合は、加工性が悪
く、また、10を超える場合は、耐放射線性、耐熱性が悪
いからである。また、ジエン成分としてエチリデンノル
ボルネン、ジシクロペンタジエン、1,4-ヘキサジエン等
が使用される。好ましいＥＰＤＭとしては、ＪＳＲ Ｅ
ＰＤＭ P1690 （ムーニー粘度33、沃素価５、エチレン
量74％）、エスプレン301 （ムーニー粘度33、沃素価1
0、エチレン量65％）、ＪＳＲ ＥＰＤＭ P2262 （ム
ーニー粘度35、沃素価６、エチレン量75％）、ＪＳＲ
ＥＰＤＭ P2120 （ムーニー粘度33、沃素価２、エチレ
ン量75％）〔いずれも住友化学製〕等が例示され、単独
あるいは併用される。[0004] The EPDM used in the present invention has an iodine value of 1 to 10 and is not particularly limited as long as it can be extruded with an appropriate blending recipe. The Mooney viscosity [ML1 + 4 (100
℃)] is 35 to 80 (especially 35 to 60), and the ethylene content is 50 to 85%
(Especially 60 to 82) are preferred. The reason for limiting the iodine value to 1 to 10 is that when the iodine value is less than 1, workability is poor, and when it is more than 10, radiation resistance and heat resistance are poor. Further, ethylidene norbornene, dicyclopentadiene, 1,4-hexadiene and the like are used as the diene component. Preferred EPDMs include JSR E
PDM P1690 (Mooney viscosity 33, iodine value 5, ethylene content 74%), Esplen 301 (Mooney viscosity 33, iodine value 1)
0, ethylene content 65%), JSR EPDM P2262 (Mooney viscosity 35, iodine value 6, ethylene content 75%), JSR
EPDM P2120 (Mooney viscosity 33, iodine value 2, ethylene content 75%) [all manufactured by Sumitomo Chemical Co., Ltd.] and the like are used alone or in combination.
【０００５】プロセス油としては、ゴム、プラスチック
に相溶性のあるものが使用される。その中でも、特に芳
香族系、ナフテン系油が好ましい。例えば、ナフテン系
としてはコウモレックス２号プロセス油〔日本石油
製〕、サンセン4240〔日本サン石油製〕、芳香族系とし
ては、ダイアナプロセス油AH-58 〔出光興産製〕、アロ
マー790 〔日本サン石油製〕、モービルゾールＫ〔モー
ビル石油製〕、プロセス油Ｘ-100〔共同石油製〕、デュ
トレックス729HP 〔昭和シェル石油製〕、三菱34ヘビー
プロセス油〔三菱石油製〕、コモレックス200 〔日本石
油製〕、パラフィン系としては、サンパー2280〔日本サ
ン石油製〕、ダイアナプロセス油PW-90 〔出光興産製〕
あるいはフェニルエーテル合成油等が例示され、これら
は単独で使用してもよくまた他のプロセス油を併用して
もよい。[0005] As the process oil, those compatible with rubber and plastic are used. Among them, aromatic and naphthenic oils are particularly preferred. For example, as a naphthenic type, Komo Rex No. 2 process oil (manufactured by Nippon Oil), Sansen 4240 (manufactured by Nippon San Petroleum), and as an aromatic type, Diana process oil AH-58 (manufactured by Idemitsu Kosan), Aroma 790 (Nihon Sun Petroleum), Mobil Zol K (Mobil Petroleum), Process Oil X-100 (Kyodo Oil), Dutrex 729HP (Showa Shell Sekiyu), Mitsubishi 34 Heavy Process Oil (Mitsubishi Petroleum), Comolex 200 [Japan Petroleum), as paraffins, Samper 2280 (Nippon Sun Oil), Diana Process Oil PW-90 (Idemitsu Kosan)
Alternatively, phenyl ether synthetic oils and the like are exemplified, and these may be used alone or in combination with other process oils.
【０００６】プロセス油は、ＥＰＤＭ100 重量部に対し
て、５〜60重量部、好ましくは15〜60重量部、より好ま
しくは20〜30重量部配合することが望ましい。その理由
は、５重量部未満では、耐放射線性に劣ることがあり、
また60重量部を超えると、引張特性が劣ることがあるか
らであるが、本発明においては特に上記配合比に制限さ
れることはない。プロセス油は、ＥＰＤＭ配合組成物の
硬化を抑制する効果があるため、ＥＰＤＭ配合組成物に
耐放射線性を付与するものと思料される。It is desirable that the process oil is blended in an amount of 5 to 60 parts by weight, preferably 15 to 60 parts by weight, more preferably 20 to 30 parts by weight, based on 100 parts by weight of EPDM. The reason is that if less than 5 parts by weight, the radiation resistance may be poor,
Also, if it exceeds 60 parts by weight, the tensile properties may be inferior, but in the present invention, there is no particular limitation to the above mixing ratio. Since the process oil has an effect of suppressing the curing of the EPDM compound composition, it is considered that the process oil imparts radiation resistance to the EPDM compound composition.
【０００７】本発明の耐放射線性組成物においては、老
化防止剤を配合することが好ましい。老化防止剤として
は、ゴム、プラスチックに一般的に用いられるものが例
示されるが、特にアミン系、キノリン系、ベンゾイミダ
ゾール系が望ましい。例えばポリ（2,2,4-トリメチル-
1,2- ジヒドロキノリン）〔ノクラック224 ，大内新興
化学製〕、4,4'- ブチリデンビス(3- メチル-6- ターシ
ャリブチルフェノール）〔ヨラノックスＢＢ，吉富製薬
製〕、N,N'- ジフェニル-p- フェニレンジアミン〔ノク
ラックＤＰ，大内新興化学製〕、2-メルカプトベンゾイ
ミダゾール〔ノクラックＭＢ，大内新興化学製〕、4,4'
- ビス（α，α−ジメチルベンジル）ジフェニルアミン
〔ナウガード445,ユニロイヤル製〕等の市販されたもの
が例示され、単独あるいは併用される。[0007] The radiation-resistant composition of the present invention preferably contains an antioxidant. Examples of the anti-aging agent include those generally used for rubber and plastics, and amine-based, quinoline-based, and benzimidazole-based agents are particularly desirable. For example, poly (2,2,4-trimethyl-
1,2-dihydroquinoline) [Nocrack 224, manufactured by Ouchi Shinko Chemical], 4,4'-butylidenebis (3-methyl-6-tert-butylphenol) [Yoranox BB, manufactured by Yoshitomi Pharmaceutical], N, N'-diphenyl -p-Phenylenediamine [Nocrack DP, Ouchi Shinko Chemical], 2-mercaptobenzimidazole [Nocrack MB, Ouchi Shinko Chemical], 4,4 '
-Commercially available products such as bis (α, α-dimethylbenzyl) diphenylamine (Naugard 445, manufactured by Uniroyal) are exemplified, and used alone or in combination.
【０００８】老化防止剤は、硬化抑制のため架橋阻害性
の大きいものが望ましく、ＥＰＤＭ100 重量部に対し
て、３〜15重量部、好ましくは３〜10重量部、より好ま
しくは５〜10重量部配合することが望ましい。その理由
は、３重量部未満では、耐熱、耐放射線性に劣ることが
あり、15重量部を超えると、架橋に時間がかかり、種類
によってはブルームを起こす恐れがあるからであるが、
本発明においては特に上記配合比に制限されない。[0008] The anti-aging agent is desirably one having a large cross-linking inhibitory property for suppressing curing, and is 3 to 15 parts by weight, preferably 3 to 10 parts by weight, more preferably 5 to 10 parts by weight based on 100 parts by weight of EPDM. It is desirable to mix. The reason is that if it is less than 3 parts by weight, heat resistance and radiation resistance may be inferior, and if it exceeds 15 parts by weight, it takes a long time for crosslinking, and depending on the type, it may cause bloom,
In the present invention, the mixing ratio is not particularly limited.
【０００９】本発明の組成物は、通常架橋された態様で
あることが好ましい。架橋剤としては、通常ＥＰゴムの
架橋剤に用いられるもの、即ち、パーオキサイド系架橋
剤と架橋助剤の組合せ、またはチュラム類−硫黄−チア
ゾール類混合系が例示され、その中でも、パーオキサイ
ド系架橋剤と架橋助剤の組合せが好適に使用される。It is preferred that the composition of the present invention is usually in a crosslinked form. Examples of the cross-linking agent include those usually used as a cross-linking agent for EP rubber, that is, a combination of a peroxide cross-linking agent and a cross-linking assistant, or a mixed system of a turam-sulfur-thiazoles. A combination of a crosslinking agent and a crosslinking aid is preferably used.
【００１０】パーオキサイド系架橋剤としては、ジクミ
ルパーオキサイド〔日本油脂製〕、1,3-ビス- ターシャ
リブチルパーオキシイソプロピルベンゼン〔パーカドッ
クス14，化薬ヌーリー製〕、1,1-ビス（ターシャリブチ
ルパーオキシ)3,3,5トリメチルシクロヘキサン〔パーヘ
キサ３Ｍ，日本油脂製〕等が用いられ、架橋助剤として
は、トリアリルイソシアヌレート〔ＴＡＩＣ，日本化成
製〕、N,N '-m-フェニレンジマレイミド〔スミファイン
ＰＭ，住友化学製〕、パラキノンジオキシム〔バルノッ
クＧＭ，大内新興化学製〕、p,p '-ジベンゾイルキノン
ジオキシム〔バルノックＤＧＭ，大内新興化学製〕、硫
黄等が好適に使用される。As the peroxide-based crosslinking agent, dicumyl peroxide (manufactured by NOF Corporation), 1,3-bis-tert-butylperoxyisopropylbenzene (Percadox 14, manufactured by Kayaku Nouri), 1,1-bis (Tertiary butyl peroxy) 3,3,5 trimethylcyclohexane [Perhexa 3M, Nippon Oil & Fats] and the like are used, and as a crosslinking aid, triallyl isocyanurate [TAIC, Nippon Kasei], N, N'- m-Phenylene dimaleimide (Sumifine PM, manufactured by Sumitomo Chemical), paraquinone dioxime (Valnoc GM, Ouchi Shinko Chemical), p, p'-dibenzoylquinone dioxime (Valnoc DGM, Ouchi Shinko Chemical) , Sulfur and the like are preferably used.
【００１１】また、チュラム類−硫黄−チアゾール類混
合系としては、テトラメチルチュラムモノスルフィド
〔ノクセラーＴＳ，大内新興化学製〕、テトラメチルチ
ュラムジスルフィド〔ノクセラーＴＴ，大内新興化学
製〕、ジペンタメチレンチュラムテトラサルファイド
〔ノクセラーＴＲＡ，大内新興化学製〕等のチュラム
類、2-メルカプトベンゾチアゾール〔ノクセラーＭ，大
内新興化学製〕、2-メルカプトベンゾチアゾールの亜鉛
塩〔ノクセラーＭＺ，大内新興化学製〕等のチアゾール
類、および硫黄の混合系が用いられる。[0011] Further, as a mixed system of turams-sulfur-thiazoles, tetramethylturam monosulfide (Noxeller TS, manufactured by Ouchi Shinko Chemical), tetramethylturam disulfide [Noxeller TT, manufactured by Ouchi Shinko Chemical], dipentane Tulams such as methyleneturam tetrasulfide [Noxeller TRA, manufactured by Ouchi Shinko Chemical], 2-mercaptobenzothiazole [Noxeller M, manufactured by Ouchi Shinko Chemical], zinc salt of 2-mercaptobenzothiazole [Noxeller MZ, Ouchi Emerging Chemical] A mixed system of thiazoles and sulfur is used.
【００１２】架橋剤および架橋助剤の合計添加量は、通
常３〜12重量部、好ましくは５〜10重量部であり、老化
防止剤を多く添加する場合、特にＥＰＤＭ100 重量部に
対して、３重量部以上の老化防止剤を添加する場合、架
橋が遅れるため、架橋剤を通常よりも多く配合すること
が望ましい。The total amount of the crosslinking agent and the crosslinking assistant is usually 3 to 12 parts by weight, preferably 5 to 10 parts by weight. When a large amount of an antioxidant is added, 3 to 10 parts by weight of EPDM is added. If more than one part by weight of the antioxidant is added, the crosslinking is delayed, so that it is desirable to add more crosslinking agent than usual.
【００１３】本発明の耐放射線性組成物には、目的、用
途に応じて、三酸化アンチモン、硼酸亜鉛、水酸化マグ
ネシウム、水酸化アルミニウム、デカブロモジフェニル
エーテル、臭素化アセナフチレン等の難燃剤、ハロゲン
系難燃剤、ステアリン酸、エステル系ワックス等の加工
助剤、焼成クレー、板状タルク、炭酸カルシウム、カー
ボン等の充填剤、フタル酸鉛、シリコンオリゴマー等の
電気特性安定剤、紫外線防止剤等の添加剤を配合しても
よい。The radiation-resistant composition of the present invention may contain a flame retardant such as antimony trioxide, zinc borate, magnesium hydroxide, aluminum hydroxide, decabromodiphenyl ether, brominated acenaphthylene, or a halogen-based compound, depending on the purpose and application. Addition of processing aids such as flame retardants, stearic acid, ester waxes, fillers such as calcined clay, plate-like talc, calcium carbonate, carbon, etc., electrical property stabilizers such as lead phthalate and silicon oligomer, and UV inhibitors You may mix | blend an agent.
【００１４】本発明の耐放射線性組成物の製造方法は、
特に制限されるものではなく任意の方法で行われる。例
えば全成分（架橋剤、架橋助剤および各種添加剤を含
む）を二本ロール、バンバリーミキサー、加圧ニーダ中
で混練する方法等が挙げられる。The method for producing the radiation-resistant composition of the present invention comprises:
The method is not particularly limited and may be performed by any method. For example, a method of kneading all components (including a cross-linking agent, a cross-linking assistant and various additives) in a two-roll mill, a Banbury mixer, or a pressure kneader may be used.
【００１５】また、本発明の組成物にて成形品を製造す
るに際しては、特殊な成形法や成形条件は必要でなく、
通常のゴムの成形条件によって十分成形することがで
き、管状物、容器、板状物等の各種成形品に成形加工で
きる。In producing a molded article from the composition of the present invention, no special molding method or molding conditions are required.
It can be molded sufficiently under ordinary rubber molding conditions, and can be molded into various molded articles such as tubular articles, containers, and plate-like articles.
【００１６】本発明の組成物を用いて電線被覆材料を得
る場合は、通常電線被覆に用いるゴムや熱可塑性樹脂用
押出機で押出被覆し、次いで連続的に架橋する。架橋温
度は、通常100 〜250 ℃程度が適当であり、架橋時間は
１分〜１時間程度である。When an electric wire covering material is obtained using the composition of the present invention, the material is extrusion-coated with an extruder for rubber or thermoplastic resin which is usually used for coating an electric wire, and then continuously crosslinked. The appropriate crosslinking temperature is usually about 100 to 250 ° C, and the crosslinking time is about 1 minute to 1 hour.
【００１７】[0017]
【発明の効果】本発明の耐放射線性組成物は、高レベル
の放射線に対して物性の変化が少なく、且つ引張特性、
耐熱性、加工性等が良好である。従って、本発明の組成
物は、ウラン濃縮施設、放射性廃棄物処理施設、使用済
燃料再処理施設等の高濃度放射線量の管理区域に於ける
成形用材料として特に有用である。EFFECT OF THE INVENTION The radiation-resistant composition of the present invention has little change in physical properties with respect to high-level radiation, and has tensile properties and
Good heat resistance, workability, etc. Therefore, the composition of the present invention is particularly useful as a molding material in a high-concentration radiation dose control area such as a uranium enrichment facility, a radioactive waste treatment facility, and a spent fuel reprocessing facility.
【００１８】[0018]
【実施例】本発明を実施例、比較例および試験例により
更に詳細に説明するが、本発明はこれらにより限定され
るものではない。EXAMPLES The present invention will be described in more detail with reference to Examples, Comparative Examples and Test Examples, but the present invention is not limited thereto.
【００１９】実施例１〜14および比較例１〜３ 以下の表に記載の通り各成分を配合し、２本ロールで混
練して、各組成物を得た。Examples 1 to 14 and Comparative Examples 1 to 3 As shown in the following table, each component was blended and kneaded with two rolls to obtain each composition.
【００２０】表中に注釈を付したものは、各々次のこと
を意味する。 *1 EPDM、ムーニー粘度33、沃素価10、エチレン量65
％〔住友化学製〕 *2 EPDM、ムーニー粘度35、沃素価６、エチレン量75
％〔住友化学製〕 *3 EPDM、ムーニー粘度33、沃素価５、エチレン量74
％〔住友化学製〕 *4 EPDM、ムーニー粘度33、沃素価２、エチレン量75
％〔住友化学製〕 *5 EPDM、ムーニー粘度38、沃素価19、エチレン量67
％〔日本合成ゴム製〕 *6 ステアリン酸〔旭電化製〕 *7 燒成クレー〔エンゲルハード製〕 *8 デカブロモジフェニールエーテル〔グレートレー
クス製〕 *9 臭素化アセナフチレン〔東ソ製〕 *10 水酸化マグネシウム〔協和化学製〕 *11 ナフテン系プロセス油〔日本サン石油製〕 *12 芳香族系プロセス油〔昭和シェル石油製〕 *13 ポリ(2,2,4 -トリメチル-1,2- ジヒドロキノリン)
〔大内新興化学製〕 *14 N,N'- ジフェニル-p- フェニレンジアミン〔大内
新興化学製〕 *15 2-メルカプトベンゾイミダゾール〔大内新興化学
製〕 *16 ジクミールパーオキサイド〔日本油脂製〕 *17 〔細井化学製〕 *18 N,N'-m- フェニレンジマレイミド〔住友化学製〕 *19 トリアリルイソシアヌレート〔日本化成製〕 *20 テトラメチルチュラムモノスルフィド〔大内新興
化学製〕 *21 2-メルカプトベンゾチアゾール〔大内新興化学
製〕 *22 p,p '-ジベンゾイルキノンジオキシム〔大内新興
化学製〕 *23 ブルーム架橋アンダーで試料作成できずAnnotations in the table mean the following, respectively. * 1 EPDM, Mooney viscosity 33, iodine value 10, ethylene amount 65
% [Sumitomo Chemical] * 2 EPDM, Mooney viscosity 35, Iodine value 6, Ethylene content 75
% [Sumitomo Chemical] * 3 EPDM, Mooney viscosity 33, iodine value 5, ethylene content 74
% [Sumitomo Chemical] * 4 EPDM, Mooney viscosity 33, Iodine value 2, Ethylene content 75
% [Sumitomo Chemical] * 5 EPDM, Mooney viscosity 38, iodine value 19, ethylene content 67
% [Nippon Synthetic Rubber] * 6 Stearic acid [Asahi Denka] * 7 Sintered clay [Engelhard] * 8 Decabromodiphenyl ether [Great Lakes] * 9 Brominated acenaphthylene [Tosoh] * 10 Magnesium hydroxide (manufactured by Kyowa Chemical) * 11 Naphthenic process oil (manufactured by Nippon San Oil) * 12 Aromatic process oil (manufactured by Showa Shell Sekiyu) * 13 Poly (2,2,4-trimethyl-1,2-) Dihydroquinoline)
(Ouchi Shinko Chemical) * 14 N, N'-diphenyl-p-phenylenediamine (Ouchi Shinko Chemical) * 15 2-Mercaptobenzimidazole (Ouchi Shinko Chemical) * 16 Dicumyl peroxide (Nippon Oil & Fats) * 17 (Hosoi Chemical) * 18 N, N'-m-phenylenedimaleimide (Sumitomo Chemical) * 19 Triallyl isocyanurate (Nippon Kasei) * 20 Tetramethylturam monosulfide (Ouchi Shinko Chemical) * 21 2-Mercaptobenzothiazole (Ouchi Shinko Chemical) * 22 p, p'-Dibenzoylquinonedioxime (Ouchi Shinko Chemical) * 23 Sample cannot be prepared due to bloom cross-linking under
【００２１】試験例 上記の実施例および比較例により得た各組成物を以下の
試験に供して、その結果を表に記載した。Test Examples Each composition obtained in the above Examples and Comparative Examples was subjected to the following tests, and the results are shown in the table.
【００２２】 耐放射線性 ２mm厚にシート出しした試料を170 ℃×20分プレス架橋
した。それぞれのシートにつき１M rad/hrの線量率で80
0M radのコバルト照射を行い、JISK6301に準拠して引張
強さ、伸びを測定した。800M radの照射後、伸びを50％
以上維持しているものを「○」、50％未満を「×」とそ
れぞれ表示した。Radiation resistance A sample sheeted to a thickness of 2 mm was press-crosslinked at 170 ° C. for 20 minutes. 80 at a dose rate of 1 Mrad / hr for each sheet
Irradiation with 0 Mrad of cobalt was performed, and tensile strength and elongation were measured in accordance with JISK6301. 50% elongation after 800M rad irradiation
What was maintained above was indicated as “○”, and less than 50% was indicated as “×”.
【００２３】 引張特性 ２mm厚のシート試料につき170 ℃×20分プレス架橋し
た。JISK6301に準拠して引張強さを測定した。引張強さ
が、0.4 kg／mm2 以上のものを「○」、0.4 kg／mm2 未
満のものを「×」と表示した。Tensile Properties A 2 mm-thick sheet sample was press-crosslinked at 170 ° C. for 20 minutes. The tensile strength was measured according to JISK6301. Those having a tensile strength of 0.4 kg / mm 2 or more were indicated by “○”, and those having a tensile strength of less than 0.4 kg / mm 2 were indicated by “×”.
【００２４】[0024]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−233740（ＪＰ，Ａ) 特開 平４−65447（ＪＰ，Ａ) 特開 平４−76011（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 23/16 C08L 91/00 C08K 3/00 - 13/08 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-233740 (JP, A) JP-A-4-65447 (JP, A) JP-A-4-76011 (JP, A) (58) Field (Int.Cl. 7 , DB name) C08L 23/16 C08L 91/00 C08K 3/00-13/08
Claims (2)
−ジエンゴム100 重量部に対して、芳香族系および／ま
たはナフテン系のプロセス油５〜60重量部、ならびにア
ミン系、キノリン系およびベンゾイミダゾール系の老化
防止剤からなる群から選ばれる一または二以上の老化防
止剤３〜15重量部が配合されてなる電線被覆用かつ耐放
射線用組成物。1. An aromatic and / or aromatic compound based on 100 parts by weight of an ethylene-propylene-diene rubber having an iodine value of 1 to 10.
Or 5 to 60 parts by weight of a naphthenic process oil , and
Mining, quinoline and benzimidazole aging
One or more anti-aging agents selected from the group consisting of inhibitors
An anti-radiation composition for covering electric wires , comprising 3 to 15 parts by weight of a blocking agent .
材料。 2. An electric wire coating using the composition according to claim 1.
material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3050461A JP3053233B2 (en) | 1991-02-22 | 1991-02-22 | Radiation resistant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3050461A JP3053233B2 (en) | 1991-02-22 | 1991-02-22 | Radiation resistant composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04268350A JPH04268350A (en) | 1992-09-24 |
| JP3053233B2 true JP3053233B2 (en) | 2000-06-19 |
Family
ID=12859514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3050461A Expired - Fee Related JP3053233B2 (en) | 1991-02-22 | 1991-02-22 | Radiation resistant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3053233B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101104676B1 (en) | 2009-05-28 | 2012-01-13 | 김현섭 | Rubber Composition |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008108355A1 (en) * | 2007-03-06 | 2008-09-12 | Swcc Showa Cable Systems Co., Ltd. | Resin composition for insulation, and wire/cable using the same |
| JP5403258B2 (en) * | 2008-12-22 | 2014-01-29 | 日立金属株式会社 | Radiation-resistant composition and electric wire / cable |
| JP6152802B2 (en) * | 2014-01-22 | 2017-06-28 | 日立金属株式会社 | Radiation-resistant halogen-free resin composition and electric wire / cable using the same |
| JP2016014145A (en) * | 2015-08-18 | 2016-01-28 | 三菱電線工業株式会社 | Nonhalogen flame-retardant rubber composition and electric wire and cable obtained using the same |
-
1991
- 1991-02-22 JP JP3050461A patent/JP3053233B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101104676B1 (en) | 2009-05-28 | 2012-01-13 | 김현섭 | Rubber Composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04268350A (en) | 1992-09-24 |
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