JPH0324137A - Raidation-resistant resin composition - Google Patents
Raidation-resistant resin compositionInfo
- Publication number
- JPH0324137A JPH0324137A JP15753089A JP15753089A JPH0324137A JP H0324137 A JPH0324137 A JP H0324137A JP 15753089 A JP15753089 A JP 15753089A JP 15753089 A JP15753089 A JP 15753089A JP H0324137 A JPH0324137 A JP H0324137A
- Authority
- JP
- Japan
- Prior art keywords
- radiation
- resin
- salicylate
- resin composition
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 18
- 230000005855 radiation Effects 0.000 claims abstract description 43
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229960001860 salicylate Drugs 0.000 claims abstract description 12
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 8
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 8
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 6
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 20
- 229920005989 resin Polymers 0.000 abstract description 15
- 239000011347 resin Substances 0.000 abstract description 15
- 239000006096 absorbing agent Substances 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 4
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 abstract description 4
- -1 2,4-di-t-butylphenyl Chemical group 0.000 abstract description 3
- DBOSBRHMHBENLP-UHFFFAOYSA-N 4-tert-Butylphenyl Salicylate Chemical compound C1=CC(C(C)(C)C)=CC=C1OC(=O)C1=CC=CC=C1O DBOSBRHMHBENLP-UHFFFAOYSA-N 0.000 abstract description 2
- 229920001684 low density polyethylene Polymers 0.000 abstract description 2
- 239000004702 low-density polyethylene Substances 0.000 abstract description 2
- 229960000969 phenyl salicylate Drugs 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000012212 insulator Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 8
- 230000000740 bleeding effect Effects 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920000098 polyolefin Polymers 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 2
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 2
- 206010073306 Exposure to radiation Diseases 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- VNFXPOAMRORRJJ-UHFFFAOYSA-N (4-octylphenyl) 2-hydroxybenzoate Chemical compound C1=CC(CCCCCCCC)=CC=C1OC(=O)C1=CC=CC=C1O VNFXPOAMRORRJJ-UHFFFAOYSA-N 0.000 description 1
- 239000005201 4-Octylphenyl Salicylate Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000000762 glandular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明は、電線・ケーブルの絶縁体・シース等の樹脂組
成物，樹脂製パイプ及びその他の樹脂製品の樹脂組成物
に係り、特に、放射線の存在する場所で使用しても、添
加剤のブリードが少なく、樹脂の機械的特性の低下を招
くことの少ない耐放射線性樹脂組成物に関する．The present invention relates to resin compositions such as insulators and sheaths for electric wires and cables, resin compositions for resin pipes, and other resin products, and particularly relates to resin compositions for resin compositions such as insulators and sheaths for electric wires and cables. This invention relates to a radiation-resistant resin composition that is less likely to cause deterioration in the mechanical properties of the resin.
原子力発電所、放射性廃棄物貯蔵施設及び放射性物質を
扱う研究、医療施設等の放射線が存在する場所に布設、
設置された電線・ケーブルの絶縁体・シース及びその他
の樹脂製品は、放射線を受けて酸化などの劣化を生じ、
その電気・機械特性が次第に低下してきて絶縁破壊など
に到る可能性がある．そこで、電線・ケーブルの絶縁体
・シースを例に取って従来の耐放射線方法を見てみる。
第ｌの方法として、このような放射線の発生している場
所に布設して用いられるケーブル等は、放射線による劣
化が起きないように、耐放射線性の絶縁材料を棲用して
放射線的影春を受けに（くしでいる６例えば、従来の耐
放射線性か・−ブル（３心低圧電力ケー・プルを例｛７
、採ってある）は、第１−同に示す如舞祷或を有し丁い
る。すなわち、耐放射線性ケ゛・一・ブル１、００は６
感体１ ３．． Ｏに耐放射線性絶縁体１，２０を押出
し被覆した絶縁線ノらＳを３本合わせ、介在物１、３０
を・介在させで撚り合わせ、そのＬから押え巻きテーブ
１４０を巻含同して施している。この介在物１３０を介
在させることにより耐放射線性多心電線ケーブルの断面
形状を円形状に整形し、しかる後、押さえ巻テー・ブ１
４０のヒにシース】、５０を被覆して形成している．し
たがって、耐放射線性多心電線ケーブル１． ０ ０は
、電線ケーブル向が濃体１ ］．． Ｏ、絶縁体１２０
、介在物１３０、押え巻きテープＩ４０、シースｌ５０
とによって密にＷ或されでいる．
第２の方法として、従来の導体の上に押出し被覆される
絶縁体材料に特殊な放射線訪御刑を配合して、導体の上
に押出し，被覆するも的である。
第３の方法として、従来の導体のＬに押帛し被覆される
絶縁体材料に酸化防止剤なＪ−．の既知の添加剤で放射
線防御効果を持つものを従来より多く配合し１，、導体
の１二に押出し被環するものである。
［発明が解決し、Ｌうとする課題】
しかしながら，従来の第１の方法の耐放射線性の絶縁材
料を使用して放射線の影響を受けｔ；’：． ＜ ＜し
たもの、及び従来の第２の方法的導体の１−．に押出し
被ｒＭ．キれる絶縁体材料に特殊な放躬線防御剤を配合
して，灘体の上に押出し被覆するものにあっては６放射
線の影響を受けにくくする）：＝いう効果は大きいため
原発の炉心付近などの多量の放射線が存在する場所に布
設すると充分有効であるが、電線・ケーブルのコス！一
が高いため原発周辺施設などの放射線レベルの低い場所
では、、コス１一的に見合わなくなってし２まうという
問題点を有している。
また、従来の第３の方法の導体の上に押高し被覆；され
る絶縁体材料に酸化防止剤なピの既知の添加剤で放射線
防獅効果を持′つものを従来より多く配合して、導体の
上に押出し被覆するものにあっては、第１及び第２の方
法に比較して放射線の影響を受けにくくする性能は低い
が電線・ケーブルのコス１・が低く、低放射線レベルで
の使用には極めて有効であるがしかし、絶縁体材料に従
来より多くの量の添加剤を配合するヒ、濃体の上に押出
し被覆した後，絶縁体材料から添加剤のブリード（樹脂
からの染み吊し）が生じたり、絶縁体材料である樹脂の
機械的特性の低下を来すなどの副作用生じるという問題
点を有している。
本発明唸、放射線の存在する場所で決用しても、添加剤
のブリードが少なく、樹脂の機械的特性の低下を招くこ
との少ない耐放射線性樹脂組成物を提供することを閂的
εしている．Installed in places where radiation is present, such as nuclear power plants, radioactive waste storage facilities, research and medical facilities that handle radioactive materials, etc.
The insulators, sheaths, and other resin products of installed wires and cables will undergo deterioration such as oxidation due to exposure to radiation.
Its electrical and mechanical properties may gradually deteriorate, leading to dielectric breakdown. So, let's take a look at conventional radiation-proofing methods, taking the insulators and sheaths of electric wires and cables as an example. The first method is to use radiation-resistant insulating materials to protect cables, etc. installed in places where such radiation is generated, so that they do not deteriorate due to radiation. For example, a conventional radiation-resistant cable (3-core low-voltage power cable) {7
, has been taken) has a similar prayer shown in the first verse. In other words, the radiation-resistant cable 1, 00 is 6
Sensation 1 3. ．． O and three insulated wires S coated with radiation-resistant insulators 1 and 20 by extrusion are combined, and inclusions 1 and 30 are
The fibers are twisted together with an interposition, and a presser winding tape 140 is wrapped around the L of the fibers. By interposing this inclusion 130, the cross-sectional shape of the radiation-resistant multi-core electric wire cable is shaped into a circular shape, and then the pressure winding tape 1
It is formed by covering the sheath of 40 mm and 50 mm. Therefore, radiation-resistant multi-conductor cable 1. 0 0 means that the wire/cable direction is dense 1]. ．． O, insulator 120
, inclusion 130, pressure winding tape I40, sheath l50
It is closely covered by W. A second method is to mix a special radiation absorbent into the insulating material that is extruded and coated onto the conventional conductor and extrude and coat it onto the conductor. A third method is to apply antioxidant J-. In this method, a larger amount of known additives having a radiation protection effect than before is blended into the conductor (1) and extruded into the conductor (12). [Problems to be Solved and Solved by the Invention] However, using the radiation-resistant insulating material of the first conventional method, it is not affected by radiation. << and the conventional second method conductor 1-. Extruded to rM. A special radiation protection agent is added to a breakable insulator material to make it less susceptible to the effects of radiation when it is extruded on top of the Nada body. It is quite effective when installed in a place where there is a large amount of radiation, such as nearby, but the cost of electric wires and cables! The problem is that the cost 1 is not worth the cost in places with low radiation levels, such as facilities around nuclear power plants, because the radiation level is high. In addition, in the conventional third method, the insulator material that is pressed and coated on the conductor contains a larger amount of known additives such as antioxidants that have a radiation-proofing effect than before. Compared to the first and second methods, the extrusion coating on the conductor has a lower performance in making the wire/cable less susceptible to the effects of radiation, but the cost of the wire/cable is lower and the radiation level is lower. However, it is extremely effective for use in insulating materials, but it is difficult to incorporate additives into the insulating material in larger amounts than before, and after extrusion coating on the concentrated material, additive bleed from the insulating material (from the resin). However, there are problems in that side effects such as staining (removal of stains) and deterioration of the mechanical properties of the resin, which is an insulator material, occur. An object of the present invention is to provide a radiation-resistant resin composition that exhibits less bleeding of additives and less deterioration of the mechanical properties of the resin even when used in a place where radiation is present. ing.
一般に、耐放射線性物質を使用する場所は原子炉の周辺
や核廃棄物の貯蔵施設などであり，これらの場所での放
射線の発失源は、限られた特定の場所（Ｒ子炉でいえば
、その炉心）である。そして、放射線の発生源からγ線
などの放射線が発生之れ当たると、ほだんどの物質が、
このγ線などの放射線を透過あるいは吸収Ｉ．、、放射
線を反射させたり、あるいは屈折させたりすることはほ
とんどない．このような場所で使用される樹脂製品は，
γ線などの放射線を受けると劣化を生じ、その電気・機
械特性が次第に低下してくることが明らかになっている
。そして、樹脂製品に、従来の混合比よりも多くの量の
添加剤を配合することにより電気・機械特性の低下を防
止することができることは知られている．しかしながら
、１穐類の添加剤を多量に添加すると樹脂がら添加剤の
ブリード（４Ｉ４脂からの染み吊し）が生じ、樹脂の機
械的持性の低下を来すなどの問題がイｉ １），この添
加剤のブリードを防ぐために種類の異なる複数の添加剤
をブレンドするという方法が考えられるが、相乗効果の
ある良い組合仕は少なし１。
以ヒの点に鑑みて本発明者は、本発明をなすに至った。
すな４）ち、上記目的を達或するために、本発明におけ
る耐放射線性樹脂組成物は、ポリオレフィン系樹脂１０
０重量部に対して、酸化防止剤４，４′−チオビス（３
−メチル−６ − ｔ−ブチルフェノール）を０．１〜
１．０重量部、及びサルチレート系紫外線吸収剤を０．
１〜１．０重量部配合して構或したものである．
そして、上記サルチレート系紫外線吸収剤を、一般式：
但し、Ｘは０〜４の整数，Ｒは炭素数１〜１０までの直
鎖又は分枝鎖のアルキル基
で表されるものにしたものである。In general, radiation-resistant materials are used in areas such as the vicinity of nuclear reactors and nuclear waste storage facilities, and the sources of radiation in these locations are limited to specific locations (not applicable to R sub-reactors). In other words, the reactor core). When radiation such as gamma rays is emitted from a radiation source, most materials become
Transmits or absorbs radiation such as γ-rays. , , hardly any radiation is reflected or refracted. Resin products used in such places are
It has become clear that exposure to radiation such as gamma rays causes deterioration, and that its electrical and mechanical properties gradually decline. It is known that deterioration of electrical and mechanical properties can be prevented by incorporating additives into resin products in a larger amount than the conventional mixing ratio. However, if a large amount of 1) additives is added, problems such as bleeding of the additive (stains from the 4I4 fat) will occur, resulting in a decrease in the mechanical durability of the resin.1) In order to prevent this additive from bleeding, a method of blending different types of additives is considered, but there are only a few good combinations that have a synergistic effect1. In view of the following points, the present inventor has accomplished the present invention. 4) In other words, in order to achieve the above object, the radiation-resistant resin composition of the present invention contains polyolefin resin 10
0 parts by weight, the antioxidant 4,4'-thiobis(3
-methyl-6-t-butylphenol) from 0.1 to
1.0 parts by weight, and 0.0 parts by weight of the salicylate ultraviolet absorber.
1 to 1.0 parts by weight. The above salicylate ultraviolet absorber has the general formula: where X is an integer of 0 to 4, and R is a straight or branched alkyl group having 1 to 10 carbon atoms. be.
上記のように構成される耐放射線性樹脂組成物にあって
は，ポリオレフイン系樹脂１００重量部に対して、４，
４′−チオビス（３−メチル−６一ｔ−ブチルフェノー
ル）を０．１〜１．０重量部，及びサルチレート系紫外
線吸収剤を０．１〜１．０重量部配合しているため、添
加剤のブリードを少なくすることができ、添加剤を配合
した樹脂の機械的特性の低下を防止することができる。In the radiation-resistant resin composition configured as described above, 4,
Since it contains 0.1 to 1.0 parts by weight of 4'-thiobis(3-methyl-6-t-butylphenol) and 0.1 to 1.0 parts by weight of salicylate ultraviolet absorber, it is an additive. Bleed can be reduced, and deterioration of the mechanical properties of the resin containing additives can be prevented.
以下，本発明の実施例について説明する。
本実施例において基本となる樹脂製品の耐放射線性樹脂
組成物は，ポリオレフィン系樹脂１００重量部に対して
、４，４′−チオビス（３−メチル−６ − ｔ−ブチ
ルフェノール）を０．１〜ｌ．Ｏ重量部，及びサルチレ
ート系紫外線吸収剤を０．１〜１．０重量部配合して構
成したものである。
本実施例においては、第１表に掲げる各種組或について
１７０℃（但し、実施例１及び比較例２は２００℃）の
熱ロールにて均一に混練し、圧縮戒形機で１６５℃、１
５０｝ｃｇｆ／．ｆｆｌ、５分の条件で厚さｌｍのプレ
スシ一トを作製して．実施例、比較例の特性評価を行っ
た。
これらの実施例に基づく耐放射線性樹脂組成物と，比較
例の耐放射線性樹脂組成物とのそれぞれについて、プレ
スシ一トからＪＩＳ３号ダンベルを打ち抜き、温度２４
℃、湿度６０％の雰囲気中で２００ｍｍ／分の速度で引
張試験を行った比較結果を第１表に示してある．この引
張試験の試料数は、それぞれの実施例で各１５片づつで
、この１５片の平均値によって破断時伸び（初期）を示
してある．また、実施例に基づく耐放射線性樹脂組成物
と、比較例の耐放射線性樹脂組成物とのそれぞれについ
てのプレスシ一トにコバルト６０を線源とするγ線を室
温，空気中で１０ＫＧｙ／ｈｒの腺量でＩＭＧｙ照射し
た後，初期と同じ条件で引張試験を行った比較結果が第
１表の破断時伸び（１．０ＭＧｙ照射後）の値として示
されている．なお、本実施例及び比較例の樹脂には、ポ
リオレフィンを用い、このポリオレフィンとしては、Ｍ
Ｉ＝３．０の低密度ポリエチレンを用いている．また，
Ｍ化防止剤として具体的には、４，４′一チオビス（３
−メチル−６ − ｔ−ブチルフェノール）である．
そして、紫外線吸収剤として具体的には、２，４−ジー
ｔ−プチルフェニール−３’，５’−ジーｔ−ブチルー
４′−ヒドロキシベンゾエート（第１表における紫外線
吸収剤Ａ）、フェニルサリシレート（第１表における紫
外線吸収剤Ｂ），４−ｔ−プチルーフェニールサリシレ
ート（第工表における紫外線吸収剤Ｃ），の３種である
６第１表中、比較例５（＝添加剤なし）と比べて比較例
２〜４は、コバルト６０を線源とするγ線を室温、空気
中で１ ０ Ｋ Ｇｙ／ｈｒの線量でＩＭＧｙ照射した
後の特性が１２８％〜１３３％とほとんど向上していな
いのが判る。また、比較例ｌは，比較例５（１３３％）
に比べてγ線をＩＭＧｙ照射した後の破断時伸びが１６
４％と向Ｌしているが、破断・時伸びの向．ヒが大きく
なく、その効果は期待するほどでない。
これらに対し、実施例ｌ〜３は，照射後の破断時伸びが
２００％以−ヒ（２０５％〜２１６％）あり、耐放射線
性が著しく向上している。これは酸化防止剤とサルチレ
ート系紫外線吸収剤との相乗効果である．
なお、各添加剤の添加量は、ポリオレフイン樹脂１００
重量部に対して、各々０．Ｌ〜１．０重量部が望ましい
。Ｏ。１重量部以下の場合、効果が充分現われず、１．
０重量部を超えるとブリードが発生し、実用的でなくな
る。
また、酸化防止剤とサルチレート系票外線吸収剤の添加
量は同じである必要はなく、前記した範囲内であればい
くらでもよい。しかし、相乗効果を充分に引き出すため
には、できるだけ同量に近い方がよい。
また，ポリオレフィン系樹脂としては，実施例で示した
ポリオレフインをはじめとして，ポリプロピレン、エチ
レンー酢酸ビニル共重合体、エチレンーエチルアクリレ
ート共重合体、エチレンープロピレン共重合体などがあ
り、これらは単独又は２種以上を組合せて使用すること
もできる．また、サルチレート系紫外線吸収剤は、実施
例で示した３種類の他に、４−オクチルフェニルサリシ
レートなどがある．Examples of the present invention will be described below. The radiation-resistant resin composition of the basic resin product in this example contains 0.1 to 4,4'-thiobis(3-methyl-6-t-butylphenol) to 100 parts by weight of polyolefin resin. l. It is composed of 0.1 to 1.0 parts by weight of O and a salicylate ultraviolet absorber. In this example, the various compositions listed in Table 1 were uniformly kneaded with a heated roll at 170°C (200°C in Example 1 and Comparative Example 2), and then kneaded with a compression molding machine at 165°C and 100°C.
50}cgf/. A press sheet with a thickness of lm was prepared under the conditions of ffl and 5 minutes. Characteristics of Examples and Comparative Examples were evaluated. For each of the radiation-resistant resin compositions based on these examples and the radiation-resistant resin compositions of comparative examples, JIS No. 3 dumbbells were punched out from press sheets and heated at a temperature of 24°C.
Table 1 shows the comparative results of a tensile test conducted at a speed of 200 mm/min in an atmosphere of 60% humidity and 60% humidity. The number of samples for this tensile test was 15 pieces for each example, and the elongation at break (initial stage) was expressed as the average value of these 15 pieces. In addition, in the press sheets for the radiation-resistant resin compositions based on the examples and the radiation-resistant resin compositions of the comparative examples, gamma rays from a cobalt-60 source were irradiated at 10 KGy/hr in air at room temperature. After IMGy irradiation with a glandular amount of 1.0 MGy, a tensile test was performed under the same conditions as the initial stage, and the results are shown in Table 1 as elongation at break (after 1.0 MGy irradiation). In addition, polyolefin was used as the resin of the present example and comparative example, and this polyolefin was M
Low density polyethylene with I=3.0 is used. Also,
Specifically, 4,4'monothiobis(3
-methyl-6-t-butylphenol). Specifically, the UV absorbers include 2,4-di-t-butylphenyl-3',5'-di-t-butyl-4'-hydroxybenzoate (UV absorbent A in Table 1), phenyl salicylate ( In Table 1, there are three types of ultraviolet absorber B), 4-t-butylphenyl salicylate (UV absorber C in Table 1), Comparative Example 5 (= no additive) and In comparison, in Comparative Examples 2 to 4, the properties were almost improved by 128% to 133% after IMGy irradiation with γ rays using cobalt 60 as a radiation source at a dose of 10 K Gy/hr in air at room temperature. I can see that there isn't. In addition, Comparative Example 1 is Comparative Example 5 (133%)
The elongation at break after IMGy γ-ray irradiation was 16 compared to
4%, but the direction of elongation at break and elongation is 4%. The effect is not as large as expected. On the other hand, in Examples 1 to 3, the elongation at break after irradiation was 200% or more (205% to 216%), and the radiation resistance was significantly improved. This is a synergistic effect between antioxidants and salicylate UV absorbers. The amount of each additive added is 100% of the polyolefin resin.
Each part by weight is 0. L~1.0 part by weight is desirable. O. If the amount is less than 1 part by weight, the effect will not be sufficient.1.
If it exceeds 0 parts by weight, bleeding will occur, making it impractical. Furthermore, the amounts of the antioxidant and the salicylate-based extraneous absorber do not need to be the same, and may be any amount within the above-mentioned range. However, in order to fully bring out the synergistic effect, it is better to keep the amounts as close to the same as possible. Examples of polyolefin resins include polyolefins shown in Examples, as well as polypropylene, ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers, and ethylene-propylene copolymers, which may be used alone or in combination. It is also possible to use a combination of more than one species. In addition to the three types of salicylate ultraviolet absorbers shown in the examples, there are also 4-octylphenyl salicylate and the like.
本発明は、以上説明したように構或されているので、以
下に記載されるような効果を奏する，ポリオレフィン系
樹脂１００重量部に対して、４ｆ４′−チオビス（３−
メチル−６ − ｔ−ブチルフェノール）を０．１〜１
．０重量部，及びサルチレート系紫外線吸収剤を０．１
〜１．０重量部配合して構或しているため、添加剤のブ
リードを少なくすることができ、添加剤を配合した樹脂
の機械的特性の低下を防止することができる。
また、本発明によれば、２種類の添加剤の相乗効果によ
り、ｌ種類の添加剤を多量に添加するのに比べてブリー
ドなどの副作用が少ない耐放射線性ポリオレフィンを得
ることができる。Since the present invention is constructed as described above, 4f4'-thiobis(3-
Methyl-6-t-butylphenol) from 0.1 to 1
．． 0 parts by weight, and 0.1 parts by weight of salicylate ultraviolet absorber.
Since the additive is blended in an amount of up to 1.0 parts by weight, bleeding of the additive can be reduced, and deterioration in the mechanical properties of the resin containing the additive can be prevented. Further, according to the present invention, due to the synergistic effect of two types of additives, it is possible to obtain a radiation-resistant polyolefin with fewer side effects such as bleeding than when a large amount of one type of additive is added.
【図面の簡単な説明】
第１図は従来の耐放射線性ケーブルの一部断面拡大斜視
同である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged perspective view of a partial cross section of a conventional radiation-resistant cable.
Claims (2)
化防止剤４，４’−チオビス（３−メチル−６−ｔ−ブ
チルフェノール）を０．１〜１．０重量部、及びサルチ
レート系紫外線吸収剤を０．１〜１．０重量部配合して
なることを特徴とする耐放射線性樹脂組成物。(1) 0.1 to 1.0 parts by weight of antioxidant 4,4'-thiobis(3-methyl-6-t-butylphenol) and salicylate ultraviolet absorber to 100 parts by weight of polyolefin resin. A radiation-resistant resin composition comprising 0.1 to 1.0 parts by weight of.
直鎖又は分枝鎖のアルキル基 で表されるものである請求項１記載の耐放射線性樹脂組
成物。(2) The above salicylate ultraviolet absorber has the general formula: ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ However, The radiation-resistant resin composition according to claim 1, which is represented by an alkyl group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157530A JP2608782B2 (en) | 1989-06-20 | 1989-06-20 | Radiation resistant resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157530A JP2608782B2 (en) | 1989-06-20 | 1989-06-20 | Radiation resistant resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0324137A true JPH0324137A (en) | 1991-02-01 |
| JP2608782B2 JP2608782B2 (en) | 1997-05-14 |
Family
ID=15651685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1157530A Expired - Fee Related JP2608782B2 (en) | 1989-06-20 | 1989-06-20 | Radiation resistant resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2608782B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008179755A (en) * | 2006-12-28 | 2008-08-07 | Fujikura Ltd | Radiation-resistant resin composition and radiation-resistant wire and cable |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2036946B1 (en) | 2007-09-14 | 2015-06-17 | Fujikura Ltd. | Radiation resistant resin composition and radiation-proof wire/cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60120733A (en) * | 1983-12-05 | 1985-06-28 | Nippon Telegr & Teleph Corp <Ntt> | Polyethylene composition |
-
1989
- 1989-06-20 JP JP1157530A patent/JP2608782B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60120733A (en) * | 1983-12-05 | 1985-06-28 | Nippon Telegr & Teleph Corp <Ntt> | Polyethylene composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008179755A (en) * | 2006-12-28 | 2008-08-07 | Fujikura Ltd | Radiation-resistant resin composition and radiation-resistant wire and cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2608782B2 (en) | 1997-05-14 |
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