JPH0245542A - Electrical insulating resin composition and power cable therefrom - Google Patents
Electrical insulating resin composition and power cable therefromInfo
- Publication number
- JPH0245542A JPH0245542A JP19563388A JP19563388A JPH0245542A JP H0245542 A JPH0245542 A JP H0245542A JP 19563388 A JP19563388 A JP 19563388A JP 19563388 A JP19563388 A JP 19563388A JP H0245542 A JPH0245542 A JP H0245542A
- Authority
- JP
- Japan
- Prior art keywords
- resin composition
- weight
- acrylic acid
- ethyl acrylate
- insulating resin
- 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.)
- Pending
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims abstract description 14
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims abstract description 10
- 239000012212 insulator Substances 0.000 claims description 7
- 238000010292 electrical insulation Methods 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 240000005572 Syzygium cordatum Species 0.000 abstract description 14
- 235000006650 Syzygium cordatum Nutrition 0.000 abstract description 14
- 230000006866 deterioration Effects 0.000 abstract description 8
- 239000004698 Polyethylene Substances 0.000 abstract description 6
- 230000001590 oxidative effect Effects 0.000 abstract description 6
- -1 polyethylene Polymers 0.000 abstract description 6
- 229920000573 polyethylene Polymers 0.000 abstract description 6
- 239000003112 inhibitor Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 2
- 239000003431 cross linking reagent Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 description 6
- 239000004703 cross-linked polyethylene Substances 0.000 description 6
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 5
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- UBRWPVTUQDJKCC-UHFFFAOYSA-N 1,3-bis(2-tert-butylperoxypropan-2-yl)benzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC(C(C)(C)OOC(C)(C)C)=C1 UBRWPVTUQDJKCC-UHFFFAOYSA-N 0.000 description 1
- RDHWNZXSDZLVGI-UHFFFAOYSA-N 1-tert-butyl-3-(3-tert-butylphenyl)sulfanylbenzene Chemical compound CC(C)(C)C1=CC=CC(SC=2C=C(C=CC=2)C(C)(C)C)=C1 RDHWNZXSDZLVGI-UHFFFAOYSA-N 0.000 description 1
- ASLNDVUAZOHADR-UHFFFAOYSA-N 2-butyl-3-methylphenol Chemical compound CCCCC1=C(C)C=CC=C1O ASLNDVUAZOHADR-UHFFFAOYSA-N 0.000 description 1
- BHIIOLWIZLICII-UHFFFAOYSA-N 2-butyl-5-methylphenol Chemical compound CCCCC1=CC=C(C)C=C1O BHIIOLWIZLICII-UHFFFAOYSA-N 0.000 description 1
- PMAAOHONJPSASX-UHFFFAOYSA-N 2-butylperoxypropan-2-ylbenzene Chemical compound CCCCOOC(C)(C)C1=CC=CC=C1 PMAAOHONJPSASX-UHFFFAOYSA-N 0.000 description 1
- 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 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 229920001600 hydrophobic polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電気絶縁性樹脂組成物およびこの電気絶縁
性樹脂組成物を絶縁体とした電カケープルに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrically insulating resin composition and an electric cable using the electrically insulating resin composition as an insulator.
ポリエチレンの優れた絶縁性を利用し、架橋により熱的
特性を向上せしめた架橋ポリエチレン絶縁電カケープル
が従来より広く使用されている。Cross-linked polyethylene insulating cables, which utilize the excellent insulating properties of polyethylene and have improved thermal properties through cross-linking, have been widely used.
しかしながら、この架橋ポリエヂレン絶縁電カケープル
にあって、このケーブル特有の現象として絶縁体中の水
分と局部的異常電界の存在によって水トリーが発生し、
ケーブルの絶縁性能が低下する問題がある。However, in this cross-linked polyethylene insulated cable, water trees occur due to moisture in the insulator and the presence of a local abnormal electric field, which is a phenomenon unique to this cable.
There is a problem that the insulation performance of the cable deteriorates.
水トリーの発生原因は、疎水性ポリマーであるポリエチ
レン中に局部的異常電界があると、そこに水分が集中す
ることによって起こると考えられる。また、水トリーの
進行は水分が架橋ポリエチレン中に注入されるとともに
、酸素、熱、水分中のイオン等によって架橋ポリエチレ
ン中に酸化劣化した部分が生じ、この酸化劣化部分を拠
点にして再び水分が注入される過程を繰り返して進むも
のと考えられる。The cause of water trees is thought to be that when there is a local abnormal electric field in polyethylene, which is a hydrophobic polymer, water concentrates there. In addition, as water tree progresses, moisture is injected into the cross-linked polyethylene, and oxidized and degraded areas are created in the cross-linked polyethylene due to oxygen, heat, ions in the moisture, etc., and this oxidized and degraded area is used as a base for moisture to return to the cross-linked polyethylene. It is thought that the process of being injected is repeated.
この発明では、アクリル酸グラフトエチレン−エチルア
クリレート共重合体（以下、ＡＡグラフトＥＥＡ樹脂と
略称する。）と超低密度ポリエチレンとの混合物であっ
て、そのアクリル酸含有む１とエチルアクリレート含有
■との合計が０．５〜１５重量％である電気絶縁性樹脂
組成物を絶縁体とすることによって水トリーの発生を防
止するようにした。In this invention, a mixture of an acrylic acid-grafted ethylene-ethyl acrylate copolymer (hereinafter abbreviated as AA-grafted EEA resin) and ultra-low density polyethylene, the acrylic acid-containing 1 and the ethyl acrylate-containing By using an electrically insulating resin composition having a total of 0.5 to 15% by weight as an insulator, the occurrence of water trees is prevented.
ΔΔグラフトＥＥΔ樹脂は分子内に極性の大きなカルボ
ン酸１□ｔおよびカルボキシル基を有して親水性であり
、これによって局部的異常電界部に水分が集中すること
が防止され、水１−リ−の発生が防止される。また、超
低密度ポリエチレンは非結晶部が多いので、ミクロクラ
ックやミクロパスが生じにくく、これによっても水トリ
ーの発生が抑制される。The ΔΔ graft EEΔ resin has a highly polar carboxylic acid 1□t and a carboxyl group in its molecule and is hydrophilic, which prevents water from concentrating in the local abnormal electric field area and occurrence is prevented. Furthermore, since ultra-low density polyethylene has many amorphous parts, microcracks and micropasses are less likely to occur, and this also suppresses the occurrence of water trees.
以下、この発明の詳細な説明する。The present invention will be explained in detail below.
この発明の電気絶縁性樹脂組成物は、Ａ△グラフ１−Ｅ
Ｅ、Ａ樹脂と超低密度ポリエチレン（ＵＬＤＰＥ）との
混合物であって、その中のアクリル酸含有Ｍとエチルア
クリレート含有５ｉとの合計が０．５〜１５重量％、好
ましくは０．５〜１０重出％の範囲にあるものである。The electrically insulating resin composition of this invention has A△graph 1-E.
A mixture of E, A resin and ultra-low density polyethylene (ULDPE), in which the total of acrylic acid-containing M and ethyl acrylate-containing 5i is 0.5 to 15% by weight, preferably 0.5 to 10% by weight. It is within the weighted percentage range.
すなわち、ＡＡグラフトＥＥＡ樹脂と超低密度ポリエチ
レンとの混合物全１中のアクリル酸量とエチルアクリレ
−１−１との合計が０．５〜１５重量％の範囲に収まる
ようにＡ△グラフトＥＥＡ樹脂の種類および超低密度ポ
リエチレンとの配合比を定めればよい。この樹脂組成物
中のアクリル間合右目ｌとエチルアクリレ−１−含有量
との合計、すなわち樹脂組成物中の全極性基の含有量に
相当する品が０５巾吊％未満では水トリー防止効果がほ
とんど１ｑられず、１５重ω％を越えると得られる組成
物の電気特性（例えば、誘電損失、 ｔａｎδ）が悪化
して好ましくない。ここで用いられるＡ△グラフトＥＥ
Ａ樹脂とは、エチレンとエチルアクリレートとを共重合
させて得られた共重合体にアクリル酸モノマーをグラフ
ト重合させてなるものであり、アクリル酸のグラフト率
（重量％）は０．１〜５％程度のものが用いられる。ま
た、ここで使用される超低密度ポリエチレン（ＵＬＤＰ
Ｅ）は、密度が０８８〜０．９１ ｇ／ｄの範囲のポリ
エチレンであって、非結晶部分が通常の低密度ポリエチ
レンよりも多いものである。That is, the A△grafted EEA resin was adjusted so that the total amount of acrylic acid and ethyl acrylate-1-1 in the entire mixture 1 of the AA-grafted EEA resin and ultra-low density polyethylene fell within the range of 0.5 to 15% by weight. The type and blending ratio with ultra-low density polyethylene may be determined. If the sum of the acrylic spacing l and the ethyl acrylate content in this resin composition, that is, the content of all polar groups in the resin composition, is less than 0.5%, the water tree prevention effect will not be effective. If it exceeds 15w%, the electrical properties (for example, dielectric loss, tan δ) of the resulting composition will deteriorate, which is undesirable. A△graft EE used here
A resin is a product obtained by graft-polymerizing an acrylic acid monomer to a copolymer obtained by copolymerizing ethylene and ethyl acrylate, and the grafting ratio (wt%) of acrylic acid is 0.1 to 5. % is used. In addition, the ultra-low density polyethylene (ULDP) used here
E) is polyethylene with a density in the range of 088 to 0.91 g/d, and has more amorphous portions than ordinary low-density polyethylene.
また、この発明の電気絶縁性樹脂組成物にあっては、酸
化劣化防１Ｆ剤を添加して、樹脂の部分的酸化劣化を防
止し、水トリーの進行を防止することが望ましい。ここ
で添加される酸化劣化防止剤としては、ペンタエリスリ
チル−テトラキス〔３（３，５−ジ−ｔ−ブチル−４−
ヒドロキシフェニル）プロピオネートコメタン（以下、
「ペンタエリスリチル」と略称する。）が特に好ましく
、この［ペンタエリスリチル」単独またはこれに４゜４
′−チオビス（６−１−ブチル−３−メチルフェノール
）やビス〔２−メチル−４（３−ｎ−アルキル（Ｃ１２
又はＣ１４）チオブロビオニルオ′ギシ）５−ｔ−ブチ
ルフェニル〕スルフィドなどを併用することもできる。Further, in the electrically insulating resin composition of the present invention, it is desirable to add an oxidative deterioration preventive agent to prevent partial oxidative deterioration of the resin and to prevent the progression of water tree. The oxidative deterioration inhibitor added here is pentaerythrityl-tetrakis [3(3,5-di-t-butyl-4-
hydroxyphenyl) propionate comethane (hereinafter referred to as
It is abbreviated as "pentaerythrityl." ) is particularly preferred, and this [pentaerythrityl] alone or in combination with 4°4
'-thiobis(6-1-butyl-3-methylphenol) and bis[2-methyl-4(3-n-alkyl(C12
Alternatively, C14) thiobrobionyl sulfide, 5-t-butylphenyl sulfide, etc. can also be used in combination.
［ペンタエリスリチル」の単独使用の場合の添加ｈ１は
樹脂組成物１００市最部に対して０．０５〜０．３重量
部程度とされる。When [pentaerythrityl] is used alone, the addition h1 is about 0.05 to 0.3 parts by weight per 100 parts of the resin composition.
０．０５φＭ部未満では添加効果が１４られず、樹脂の
酸化劣化を防止することができず、また０、３重量部を
越えて添加してら効果の増大がちはや１！７られず、不
経済でもある。この「ペンタエリスリデル」としては、
例えばチバガイ１ｉ−社から商品名パイルガノックスコ
０１０“′として市販されているしのなどが使用できる
。「ペンタエリスリデル」と他の酸化劣化防止剤との併
用の場合には、樹脂組成物１００重岨部に対して、合８
１出で０２〜０．４重量部程度を添加することが好まし
い。If it is less than 0.05 parts by weight, the effect of addition will not be 14 and it will not be possible to prevent oxidative deterioration of the resin, and if it is added in excess of 0.3 parts by weight, the effect will not increase by 1!7, which is uneconomical. There is also. As this "Pentaerythridel",
For example, Shino, which is commercially available from Cibagai Ii-sha under the trade name Pile Ganoxco 010"', can be used. When "Pentaerythridel" is used in combination with other oxidative deterioration inhibitors, the resin composition For 100 heavy slopes, 8
It is preferable to add about 0.2 to 0.4 parts by weight per portion.
また、この発明の電気絶縁性樹脂組成物は、架橋されて
いてもよく、また未架橋であってもよい。Further, the electrically insulating resin composition of the present invention may be crosslinked or uncrosslinked.
これの架橋には、ジクミルパーオキリ゛イド、しブチル
クミルパーオキサイド、１．３−ビス（ｔ−ブチルパー
オキシイソプロビル）−ベンゼンなどの有機過酸化物か
らなる架橋剤が用いられ、ベースポリマーとなる樹脂組
成物１００ｔｆｉ ｆｆｉ部に対して１．５〜３重ｆ６
部程度が添加される。For crosslinking, a crosslinking agent consisting of an organic peroxide such as dicumyl peroxide, butylcumyl peroxide, and 1,3-bis(t-butylperoxyisopropyl)-benzene is used. 1.5 to 3 times f6 per 100tfi ffi parts of the resin composition that becomes the base polymer
About 100% is added.
さらに、この発明の電気絶縁性樹脂組成物には、必要に
応じて種々の添加剤を適宜添加することができる。Furthermore, various additives can be appropriately added to the electrically insulating resin composition of the present invention as required.
また、この発明の電カケープルは、上記電気絶縁性樹脂
組成物からなる絶縁体を有するものであって、導体上に
直接または内部半導電層などを介して押出被覆法などに
よって電気絶縁性樹脂組成物からなる絶縁体を形成した
ものである。Further, the electric cable of the present invention has an insulator made of the above-mentioned electrically insulating resin composition, and the electrically insulating resin composition is formed on the conductor by extrusion coating directly or through an internal semiconductive layer or the like. It is made of an insulator made of material.
このような電カケープルにあっては上述の理由により水
１−リーの発生およびその進行が防止され、ケーブルの
絶縁性能が低下するなどの不都合が生じない。In such a power cable, the generation and progression of water leakage are prevented for the above-mentioned reasons, and problems such as deterioration of the insulation performance of the cable do not occur.
（実施例１〜４）
超低密度ポリエチレン（メルトインデックス３）に対し
てＡ△グラフトＥＥＡ樹脂（メルトインデックス５．ア
クリル酸含有量２重量％、エチルアクリレート含有星３
６重ｆｉ１％）を種々の割合で混合し、この混合物全体
中のアクリル酸含有量とエチルアクリレート含有量との
合計が０．５宙吊％、２重量％、１０申吊％、１５重損
％の樹脂組成物を得、この樹脂組成物１００重量部に対
してジクミルパーオキサイド２巾量部、［ペンタエリス
リデルＪ Ｏ，１５重量部を添加して混練し、この発
明の電気絶縁性樹脂組成物を得た。(Examples 1 to 4) A△ grafted EEA resin (melt index 5. Acrylic acid content 2% by weight, ethyl acrylate content star 3) to ultra-low density polyethylene (melt index 3)
6-weight fi 1%) in various proportions, and the total of the acrylic acid content and ethyl acrylate content in the whole mixture is 0.5% by weight, 2% by weight, 10% by weight, and 15% by weight. % of the resin composition was obtained, and to 100 parts by weight of this resin composition, 2 parts by weight of dicumyl peroxide and 15 parts by weight of [pentaerythridel JO] were added and kneaded to obtain the electrical insulation properties of the present invention. A resin composition was obtained.
（比較例１〜３〉
超低密度ポリエチレン（メルトインデックス３）に対し
て△ＡグラフトＥＥＡ樹脂（メルトインデックス５．ア
クリル酸含有量２重足％、エチルアクリレート含右ｈ）
３０重１％）を種々の割合で混合し、この混合物全体中
のアクリル酸含有量とエチルアクリレ−１・含有量との
合計が０重量％、０．３重量％、２０重量％の樹脂組成
物を得、この樹脂組成物１００重量部に対してジクミル
バーオキナイド２小吊部、４，４′−チＡどス（６−ｔ
ブチル−３−メチルフェノール） ０．１５Φω部、
ビス〔２−メチル−４−（３−ｎ−アルキル（Ｃ１２ま
たはＣ１４）チオプロピオニルオキシ）−５ｔ−ブチル
フェニルフスルフィド０．１５重量部を添加して混練し
、樹脂組成物を得た。(Comparative Examples 1 to 3) △A graft EEA resin (melt index 5. Acrylic acid content 2%, ethyl acrylate content h) to ultra-low density polyethylene (melt index 3)
30% by weight and 1%) in various proportions, and the total of the acrylic acid content and ethyl acrylate-1 content in the whole mixture is 0% by weight, 0.3% by weight, and 20% by weight. To 100 parts by weight of this resin composition, 2 small parts of dicumyl peroxide, 4,4'-thiAdos (6-t
butyl-3-methylphenol) 0.15Φω part,
0.15 parts by weight of bis[2-methyl-4-(3-n-alkyl (C12 or C14) thiopropionyloxy)-5t-butylphenyl sulfide was added and kneaded to obtain a resin composition.
（実施例５〜６）
超低密度ポリエチレン（メルトインデックス３）に対し
てＡＡグラフＩ−Ｅ Ｅ Ａ樹脂（メルトインデックス
５．アクリル酸含有ｍ２重量％、エチルアクリレ−１〜
含有毎３０重Ｍ％）を種々の割合で混合し、この混合物
全体中のアクリル酸含有量とエチルアクリレ−１〜含有
徂との合Ｊ１が２巾♀％、５重量％の樹脂組成物を１！
、１、この樹脂組成物１００重足部にジクミルパーオキ
サイド２重量部、４゜４′−チオビス（６−ｔ−ブチル
−３−メチルフェノール）０．３巾ｈ１部を添加して混
練し、樹脂組成物を得た。(Examples 5-6) AA graph I-E E A resin (melt index 5. acrylic acid content m2 wt%, ethyl acrylate-1~
(containing 30% by weight M%) in various ratios, and a resin composition in which the sum of the acrylic acid content in the whole mixture and the content of ethyl acrylate-1 to J1 is 2% by weight and 5% by weight is 1% by weight. !
1. To 100 parts by weight of this resin composition, 2 parts by weight of dicumyl peroxide and 0.3 parts by weight of 4°4'-thiobis(6-t-butyl-3-methylphenol) were added and kneaded. , a resin composition was obtained.
（実施例７〜９）
超低密度ポリエチレン（メルトインデックス３）に対し
てΔＡグラフ＋−Ｅ Ｅ Ａ樹脂（メルトインデックス
５．アクリル酸含有量２重量％、エチルアクリレート含
有聞３０重量％）を混合し、アクリル酸含有量とエチル
アクリレート含有量との合計が６重量％の樹脂組成物を
得、この樹脂組成物１００重量部に対してジクミルパー
オキサイド２重量部および「ペンタエリスリチルＪ
Ｏ，０５重量部、０．３重足部、０．５手足部添加して
北練し、樹脂組成物を得た。(Examples 7 to 9) Mixing ΔA graph +-E E A resin (melt index 5, acrylic acid content 2% by weight, ethyl acrylate content 30% by weight) with ultra-low density polyethylene (melt index 3) A resin composition having a total of 6% by weight of acrylic acid content and ethyl acrylate content was obtained, and 2 parts by weight of dicumyl peroxide and "pentaerythrityl J" were added to 100 parts by weight of this resin composition.
05 parts by weight of O, 0.3 parts by weight and 0.5 parts by weight were added and kneaded to obtain a resin composition.
これらの実施例および比較例で得られた樹脂組成物を１
６０℃、４０分の条件でプレス成形し、以下に示す水ト
リー試験、誘電正接（ｔａｎδ）測定試験を行った。そ
の結果を第１表に示した。The resin compositions obtained in these Examples and Comparative Examples were
Press molding was performed at 60° C. for 40 minutes, and the following water tree test and dielectric loss tangent (tan δ) measurement test were conducted. The results are shown in Table 1.
このプレス成形後、それぞれのゲル分率の測定を１００
℃のキシレンに２４時間浸漬して行ったところ、いずれ
も８０％以上であり、架橋されていることが判った。After this press molding, the gel fraction of each was measured at 100
When immersed in xylene at ℃ for 24 hours, it was found that the crosslinking was 80% or more in all cases, indicating that they were crosslinked.
水トリー試験は、第１図に示したにうに厚さ３ｍの試料
１の一側面に導電性塗料の塗布による接地電極２を設（
プるとともに試料１の他側面には水槽３を形成して水電
極４を設け、これら接地電極２、水電極４間に１ＫＩＩ
Ｚ、１０にＶの電圧を印加できるように構成し、８０℃
オーブン中で上記電圧を３０日間印加後、試料１を煮沸
染色して水トリーを観察した。５０μｍ以上の水トリー
光生密度を観察し、比較例１の試料（架橋ポリエチレン
のみ〉の発生数１００に対する相対数として表示した。In the water tree test, a ground electrode 2 was installed on one side of a 3 m thick sample 1 by applying conductive paint as shown in Figure 1.
At the same time, a water tank 3 is formed on the other side of the sample 1, and a water electrode 4 is provided.
It is configured so that a voltage of V can be applied to Z and 10, and the temperature is 80°C.
After applying the above voltage in an oven for 30 days, Sample 1 was dyed by boiling and water trees were observed. The water tree photogenic density of 50 μm or more was observed and expressed as a relative number to the number of occurrences of 100 of the sample of Comparative Example 1 (crosslinked polyethylene only).
誘電正接（ｔａｎδ）測定試験は、厚さ０．５ｍのシー
トを試料とし、これに５０１１ｚ、 １ ＫＶの電圧を
印加し、シ■−リングブリッジにより測定した。In the dielectric loss tangent (tan δ) measurement test, a sheet having a thickness of 0.5 m was used as a sample, a voltage of 5011z and 1 KV was applied to the sample, and the measurement was performed using a sealing bridge.
第
表
以
下
余
白
＊１：［ペンタエリスリチル］単独添加＊２：４４“−
チオビス（６−ｔ−ブチ−ルー３−メチルフェノール）
０．１５車ｈ１部とビス〔２−メチル−４−（３−ｎ−
アルキル（Ｃ１２またはＣ１４）チオプロピオニルオキ
シ）−５−ｔ−ブヂルフ１ニル］スルフィド０１５重足
部＊３ ： ｌ：’ス（２−メチル−４−（３−ｎ−ア
ルキル（Ｃ１？またはＣ１４）チオプロピオニルオキシ
）−Ｓ−ｔ−ブヂルフェニル〕スルフィド単独添加第１
表から、この発明の電気絶縁性樹脂組成物は水トリーの
発生が極めて少なく、電気特Ｈの低下がほとんどないこ
とが判る。特に、老化防止剤として［ペンタエリスリチ
ル］を添加したものでは水トリーの進行が抑制されるこ
とも判る。Margin below the table *1: [Pentaerythrityl] added alone *2: 44"-
Thiobis (6-t-buty-3-methylphenol)
0.15 car h1 part and bis[2-methyl-4-(3-n-
Alkyl (C12 or C14) thiopropionyloxy)-5-t-butylphinyl] sulfide 015 heavy foot *3: l:'s(2-methyl-4-(3-n-alkyl (C1? or C14) 1st addition of thiopropionyloxy)-S-t-butylphenyl sulfide alone
From the table, it can be seen that the electrically insulating resin composition of the present invention has very little occurrence of water trees and almost no decrease in electrical properties H. In particular, it has been found that the progress of water tree is suppressed in the case where [pentaerythrityl] is added as an anti-aging agent.
（発明の効果）
以上説明したように、この発明の電気絶縁性樹脂組成物
は、アクリル酸グラフトエチレン−エチルアクリレ−１
ｍ共重合体と超低ａ［ポリエチレンとの混合物であって
、そのアクリル酸含有機とエチルアクリレート含有量と
の合計が０．５〜１５重足％であるものであり、またこ
の発明の電カケープルはこの電気絶縁性樹脂組成物から
なる絶縁体を有するものであるので、水１へり−の発生
がなく、しかも電気特性の良好な組成物が得られ、絶縁
性能の低下のない電カケープルが得られる。(Effects of the Invention) As explained above, the electrically insulating resin composition of the present invention has acrylic acid grafted ethylene-ethyl acrylate-1
A mixture of a polyethylene copolymer and an ultra-low a[polyethylene] in which the total content of acrylic acid and ethyl acrylate is 0.5 to 15% by weight; Since the cable has an insulator made of this electrically insulating resin composition, a composition with good electrical properties is obtained without the generation of water, and an electrical cable with no deterioration in insulation performance can be obtained. can get.
第１図は、実施例にＪ３ける水１−り一試験のための装
置を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an apparatus for water 1-1 test in J3 in Example.
Claims (2)
ト共重合体と超低密度ポリエチレンとの混合物であつて
、そのアクリル酸含有量とエチルアクリレート含有量と
の合計が０．５〜１５重量％である電気絶縁性樹脂組成
物。(1) Electrical insulation which is a mixture of acrylic acid grafted ethylene-ethyl acrylate copolymer and ultra-low density polyethylene, in which the total acrylic acid content and ethyl acrylate content is 0.5 to 15% by weight. resin composition.
ト共重合体と超低密度ポリエチレンとの混合物であって
、そのアクリル酸含有量とエチルアクリレート含有量と
の合計が０．５〜１５重量％である電気絶縁性樹脂組成
物を絶縁体とする電力ケーブル。(2) Electrical insulation which is a mixture of acrylic acid grafted ethylene-ethyl acrylate copolymer and ultra-low density polyethylene, the total of the acrylic acid content and ethyl acrylate content being 0.5 to 15% by weight. A power cable that uses a synthetic resin composition as an insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19563388A JPH0245542A (en) | 1988-08-05 | 1988-08-05 | Electrical insulating resin composition and power cable therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19563388A JPH0245542A (en) | 1988-08-05 | 1988-08-05 | Electrical insulating resin composition and power cable therefrom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0245542A true JPH0245542A (en) | 1990-02-15 |
Family
ID=16344409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19563388A Pending JPH0245542A (en) | 1988-08-05 | 1988-08-05 | Electrical insulating resin composition and power cable therefrom |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0245542A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100236782B1 (en) * | 1997-05-07 | 2000-01-15 | 이종훈 | Resin for controlling charge distribution |
| EP1605473A1 (en) * | 2004-06-11 | 2005-12-14 | Borealis Technology Oy | An insulating composition for an electric power cable |
-
1988
- 1988-08-05 JP JP19563388A patent/JPH0245542A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100236782B1 (en) * | 1997-05-07 | 2000-01-15 | 이종훈 | Resin for controlling charge distribution |
| EP1605473A1 (en) * | 2004-06-11 | 2005-12-14 | Borealis Technology Oy | An insulating composition for an electric power cable |
| WO2005122185A1 (en) * | 2004-06-11 | 2005-12-22 | Borealis Technology Oy | An insulating composition for an electric power cable |
| US8501864B2 (en) | 2004-06-11 | 2013-08-06 | Borealis Technology Oy | Insulating composition for an electric power cable |
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