JPS63289715A - Composition for wire-cable insulator - Google Patents
Composition for wire-cable insulatorInfo
- Publication number
- JPS63289715A JPS63289715A JP12307887A JP12307887A JPS63289715A JP S63289715 A JPS63289715 A JP S63289715A JP 12307887 A JP12307887 A JP 12307887A JP 12307887 A JP12307887 A JP 12307887A JP S63289715 A JPS63289715 A JP S63289715A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- phr
- organic peroxide
- insulator
- wire
- 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
- 239000012212 insulator Substances 0.000 title claims description 18
- 239000000203 mixture Substances 0.000 title claims description 17
- -1 polyethylene Polymers 0.000 claims abstract description 17
- 150000001451 organic peroxides Chemical class 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 239000012948 isocyanate Substances 0.000 claims description 10
- 230000006866 deterioration Effects 0.000 claims description 5
- 239000003112 inhibitor Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003431 cross linking reagent Substances 0.000 abstract description 5
- 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 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 abstract 3
- 230000003078 antioxidant effect Effects 0.000 abstract 3
- 150000002148 esters Chemical class 0.000 abstract 3
- KTOQRRDVVIDEAA-UHFFFAOYSA-N 2-methylpropane Chemical compound [CH2]C(C)C KTOQRRDVVIDEAA-UHFFFAOYSA-N 0.000 abstract 1
- HNUALPPJLMYHDK-UHFFFAOYSA-N C[CH]C Chemical compound C[CH]C HNUALPPJLMYHDK-UHFFFAOYSA-N 0.000 abstract 1
- QUPDWYMUPZLYJZ-UHFFFAOYSA-N ethyl Chemical compound C[CH2] QUPDWYMUPZLYJZ-UHFFFAOYSA-N 0.000 abstract 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 abstract 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 1
- 150000003254 radicals Chemical class 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- OIGWAXDAPKFNCQ-UHFFFAOYSA-N 4-isopropylbenzyl alcohol Chemical compound CC(C)C1=CC=C(CO)C=C1 OIGWAXDAPKFNCQ-UHFFFAOYSA-N 0.000 description 4
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 240000005572 Syzygium cordatum Species 0.000 description 2
- 235000006650 Syzygium cordatum Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 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 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001125 extrusion Methods 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
- 238000002156 mixing Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- 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〉
本発明は、電カケープル等の絶縁体の架橋剤として有機
過酸化物、特にジクミルパーオキサイド（以下、ＤＣＰ
と略記する）を使用した場合に生じる水トリーの問題を
解消した電線・ケーブル絶縁体用組成物に関するもので
ある。Detailed Description of the Invention <Industrial Application Field> The present invention uses organic peroxides, particularly dicumyl peroxide (hereinafter referred to as DCP), as a crosslinking agent for insulators such as electrical cables.
This invention relates to a composition for electric wire/cable insulators that eliminates the problem of water treeing that occurs when using a wire/cable insulator.
〈従来の技術〉
電線・ケーブル等の絶縁体として、ポリエチレン等のポ
リオレフィンを用い、これを架橋する場合、架橋剤とし
て有機過酸化物、特にＤＣＰを用いることが多い。<Prior Art> When a polyolefin such as polyethylene is used as an insulator for electric wires, cables, etc. and is crosslinked, an organic peroxide, particularly DCP, is often used as a crosslinking agent.
〈発明が解決しようとする問題点〉
ところが、このＤＣＰは架橋時の熱分解により、クミル
アルコール（ＣＡ）とアセトフェノン（ＡＰ）を生成し
、このクミルアルコールはケーブルのモールドジヨイン
ト時等の再加熱等により二次分解されて、α−メチルス
チレン（α−ＭＳ）と水（水分）になる。<Problems to be solved by the invention> However, this DCP generates cumyl alcohol (CA) and acetophenone (AP) through thermal decomposition during crosslinking, and this cumyl alcohol is released during cable mold joints, etc. It undergoes secondary decomposition by reheating, etc., and becomes α-methylstyrene (α-MS) and water (moisture).
この水は、ポリエチレン絶縁体中で凝集し、これに電場
が掛けられると、水トリーの原因となる。This water condenses in the polyethylene insulation and causes water treeing when an electric field is applied to it.
この水トリーは絶縁体の絶縁破壊電圧を低下させると考
えられる。This water tree is thought to reduce the breakdown voltage of the insulator.
従って、ＤＣＰの二次分解によって生じる水は、電線・
ケーブルの電気特性の低下を招くこととなる。Therefore, the water produced by the secondary decomposition of DCP is
This will lead to deterioration of the electrical characteristics of the cable.
本発明は、このような従来の実情に鑑みて成されたもの
である。The present invention has been made in view of such conventional circumstances.
く問題点を解決するための手段及びその作用〉か＼る本
発明の特徴とする点は、絶縁体の架橋にあたって、ＤＣ
Ｐを用いる場合、このＤＣＰの他に添加剤として、イソ
シアン酸エステルをもちいることにより、ＤＣＰの二次
分解による水の発生を極力抑えて絶縁体の絶縁破壊電圧
の低下を防止しようとするのである。Means for Solving the Problems and Their Effects> A feature of the present invention is that when crosslinking an insulator, DC
When using P, in addition to this DCP, isocyanate ester is used as an additive in order to suppress the generation of water due to secondary decomposition of DCP and prevent a drop in the dielectric breakdown voltage of the insulator. be.
本発明をより具体的に示すと、ポリエチレンに対して、
有機過酸化物を０．５〜３．０ｐｈｒ、イソシアン酸エ
ステル（ＲＮ＝Ｃ＝Ｏ）を０．５〜２．０ｐｈｒ、酸化
劣化防止剤を０．１〜０゜３ｐｈｒ添加した電線・ケー
ブル絶縁体用組成物にある。To illustrate the present invention more specifically, for polyethylene,
Wire/cable insulation containing 0.5 to 3.0 phr of organic peroxide, 0.5 to 2.0 phr of isocyanate ester (RN=C=O), and 0.1 to 0.3 phr of oxidative deterioration inhibitor. In body compositions.
この組成物において、イソシアン酸エステルの添加はＣ
Ａの分解による水の発生を抑えるためのものであり、そ
の添加量を、有機過酸化物が０゜５〜３．０ｐｈｒの範
囲において、０．５〜２゜０ｐｈｒとしたのは、次の理
由による。In this composition, the addition of isocyanate ester is C
This is to suppress the generation of water due to decomposition of A, and the reason why the amount added is 0.5 to 2.0 phr in the range of 0.5 to 3.0 phr of organic peroxide is as follows. Depends on the reason.
つまり、有機過酸化物が０．５〜３．Ｑｐｈｒの範囲で
あっても、イソシアン酸エステルが２゜０ｐｈｒを越え
ると絶縁体の押出時にスコーチ（早期加硫）が生し、又
これがＱ、５ｐｈｒ未満では十分な水分抑制効果が得ら
れないからである。That is, the organic peroxide is 0.5 to 3. Even within the range of Qphr, if the isocyanate ester exceeds 2.0 phr, scorch (early vulcanization) will occur during extrusion of the insulator, and if Q is less than 5 phr, sufficient moisture suppression effect cannot be obtained. It is.
又逆に、イソシアン酸エステルが０．５〜２． ０ｐｈ
ｒの範囲にあっても、有機過酸化物が０．５ｐｈｒ未満
では架橋時間が長くなって実用的とは言えなくなり、又
有機過酸化物が３．０ｐｈｒを越えると水分発生量が多
くなり過ぎてイソシアン酸エステル添加の効果が得られ
なくなるからである。そして、ここで用いられるイソシ
アン酸エステル（ＲＮ＝Ｃ＝Ｏ）は、そのＲ基が、ＣＨ
３、Ｃ，Ｈ３、ｉ ｓ ｏ−Ｃ，Ｈｔ、ｔｓｏｃ４Ｈｑ
、Ｃ３Ｈ５、α−Ｃ１０Ｈ７、β−Ｃ１０Ｈ，から選ば
れた基であることが好ましい。Conversely, isocyanate ester is 0.5 to 2. 0ph
Even within the r range, if the organic peroxide content is less than 0.5 phr, the crosslinking time becomes too long to be practical, and if the organic peroxide content exceeds 3.0 phr, too much water will be generated. This is because the effect of adding isocyanate ester cannot be obtained. The isocyanate ester (RN=C=O) used here has an R group of CH
3, C, H3, is o-C, Ht, tsoc4Hq
, C3H5, α-C10H7, and β-C10H.
本発明で用いる有機過酸化物として、既述のＤＣＰの他
に、２．５−ジ（ｔ−ブチルペルオキシ）ヘキシン−３
等の使用も可能である。In addition to the above-mentioned DCP, organic peroxides used in the present invention include 2,5-di(t-butylperoxy)hexyne-3
It is also possible to use
上記酸化劣化防止剤としては、４．４′−チオビス（３
−メチル−６−ｔ−ブチル−フェノール、以下、４．４
′−チオビスと略記する）、ビス［２−メチル−４−（
３−ｎ−アルキル（Ｃ＋ｚまたはＣ１４）チオプロピオ
ニルオキシ）−５−ｔ−ブチルフェニル］スルフィド等
が挙げられる。そして、この酸化劣化防止剤の添加量を
０．１〜０゜３ｐｈｒとしてのは、０．１ｐｈｒ未満で
は絶縁体の老化特性が悪化し、逆に０．３ｐｈｒを越え
た場合にはブルームが生じたり、架橋度が十分に向上し
ないからである。As the above-mentioned oxidative deterioration inhibitor, 4,4'-thiobis(3
-Methyl-6-t-butyl-phenol, hereinafter 4.4
'-thiobis), bis[2-methyl-4-(
Examples include 3-n-alkyl (C+z or C14) thiopropionyloxy)-5-t-butylphenyl] sulfide. The amount of the oxidative deterioration inhibitor added is set at 0.1 to 0.3 phr.If it is less than 0.1 phr, the aging characteristics of the insulator will worsen, and if it exceeds 0.3 phr, bloom will occur. This is because the degree of crosslinking is not sufficiently improved.
このような特定量の配合により、クミルアルコールの分
解によって発生する水分量が少なくなり、且つ十分な架
橋度（ゲル分率−８５％以上）も達成される。即ち、優
れた電線・ケーブル絶縁体用組成物を得ることができる
。By blending in such a specific amount, the amount of water generated by decomposition of cumyl alcohol is reduced, and a sufficient degree of crosslinking (gel fraction -85% or more) is achieved. That is, an excellent composition for electric wire/cable insulators can be obtained.
〈実施例Ｉ〉
次に、低密度ポリエチレン（密度、０．９２）、ＤＣＰ
、イソシアン酸エステル、酸化劣化防止剤の各成分を種
々の割合で配合し、本発明条件を満足させる実施例品（
Ｎｏ■〜■）の絶縁体組成物と、本発明条件を欠く比較
例品（Ｎｏ、■〜■）の絶縁体組成物とを第１表の如く
作成し、種々の特性試験をした。その結果を第１表に併
記した。<Example I> Next, low density polyethylene (density, 0.92), DCP
Example products (
Insulator compositions Nos. 1 to 2) and comparative insulator compositions lacking the conditions of the present invention (Nos., 1 to 2) were prepared as shown in Table 1, and various property tests were conducted. The results are also listed in Table 1.
尚、この特性試験では、上記配合のものをロールプレス
によってシート状に生成した組成物と、このシート状の
組成物を１６０°ＣＸ４時間加熱した後の組成物につい
て、試験を行った。In this characteristic test, a composition prepared by roll pressing the composition described above into a sheet, and a composition obtained by heating this sheet-like composition at 160° C. for 4 hours were tested.
上記第１表から、１６０ ’ＣＸ ４時間の加熱後から
明らか如（、比較例孔（■〜■）の場合、クミルアルコ
ールが分解して水が生成され、その量が２００〜５００
ｐｐｍに達するのに対して、本発明の実施別品（■〜■
）にあっては、同じ条件で加熱しても、１１０ｐｐｍ程
度でって、発生水分量が効果的に抑制されていることが
判る。From Table 1 above, it is clear that after heating for 4 hours at 160'C
ppm, whereas the implementation of the present invention (■～■
), even when heated under the same conditions, the amount of moisture generated was about 110 ppm, indicating that the amount of moisture generated was effectively suppressed.
〈実施例■〉
上記実施別品Ｎｏ■と比較例孔Ｎｏ、■の組成物からな
る絶縁体を用いて、６６Ｋｖ、ｌＸ２５０ｍｍ２のＣ■
ケーブルを製造し、その絶縁体を取って加熱（１６０°
ＣＸ４時間等の条件）し、水分発生量を測定した。その
結果は、実施別品Ｎα■では６４ｐｐｍであるのに対し
て、比較例孔Ｎα■では３４１ｐｐｍであった。<Example ■> Using an insulator made of the composition of the above-mentioned example product No. ■ and comparative example hole No. ■, C
Manufacture the cable, remove its insulation and heat it (160°
CX (conditions such as 4 hours) and the amount of water generated was measured. As a result, the concentration was 64 ppm for the practical product Nα■, while it was 341 ppm for the comparative example hole Nα■.
この結果から、本発明の場合、水分発生の抑制効果が十
分達成されていることが判る。This result shows that in the case of the present invention, the effect of suppressing moisture generation is sufficiently achieved.
〈発明の効果〉
以上の説明から明らかなように本発明によれば、架橋剤
としてＤＣＰを用いた絶縁体組成物において、このＤＣ
Ｐと、イソシアン酸エステルを用いることにより、ＤＣ
Ｐの二次分解生成物である水分の発生量を大幅に減少さ
せ、水トリー防止効果に優れた電線・ケーブル絶縁体用
組成物を提供することができる。この絶縁体組成物を用
いれば、絶縁破壊電圧の低下を防止した優れたケーブル
、例えば電カケープル等を得ることができる。<Effects of the Invention> As is clear from the above description, according to the present invention, in an insulator composition using DCP as a crosslinking agent, this DC
By using P and isocyanate ester, DC
It is possible to provide a composition for electric wire/cable insulators that significantly reduces the amount of water generated, which is a secondary decomposition product of P, and has an excellent water tree prevention effect. By using this insulator composition, it is possible to obtain an excellent cable that prevents a decrease in dielectric breakdown voltage, such as an electric cable.
Claims (2)
３．０ｐｈｒ、イソシアン酸エステル（ＲＮ＝Ｃ＝Ｏ）
を０．５〜２．０ｐｈｒ、酸化劣化防止剤を０．１〜０
．３ｐｈｒ添加したことを特徴とする電線・ケーブル絶
縁体用組成物。(1) Add organic peroxide to polyethylene from 0.5 to
3.0 phr, isocyanate ester (RN=C=O)
0.5 to 2.0 phr, 0.1 to 0 oxidative deterioration inhibitor
．． A composition for electric wire/cable insulation, characterized in that it contains 3 phr.
＿２Ｈ＿５、ｉｓｏ−Ｃ＿３Ｈ＿７、ｉｓｏ−Ｃ＿４Ｈ
＿９、Ｃ＿６Ｈ＿５、α−Ｃ＿１＿０Ｈ＿７、β−Ｃ＿
１＿０Ｈ＿７から選ばれた基であることを特徴とする特
許請求の範囲第１項記載の電線・ケーブル絶縁体用組成
物。(2) R of the isocyanate ester is CH_3, C
_2H_5, iso-C_3H_7, iso-C_4H
_9, C_6H_5, α-C_1_0H_7, β-C_
The composition for wire/cable insulators according to claim 1, characterized in that the group is selected from 1_0H_7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12307887A JPS63289715A (en) | 1987-05-20 | 1987-05-20 | Composition for wire-cable insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12307887A JPS63289715A (en) | 1987-05-20 | 1987-05-20 | Composition for wire-cable insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63289715A true JPS63289715A (en) | 1988-11-28 |
Family
ID=14851647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12307887A Pending JPS63289715A (en) | 1987-05-20 | 1987-05-20 | Composition for wire-cable insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63289715A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811534A (en) * | 1981-07-13 | 1983-01-22 | Furukawa Electric Co Ltd:The | Polyolefin resin composition |
-
1987
- 1987-05-20 JP JP12307887A patent/JPS63289715A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811534A (en) * | 1981-07-13 | 1983-01-22 | Furukawa Electric Co Ltd:The | Polyolefin resin composition |
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