JPH0143968B2 - - Google Patents
Info
- Publication number
- JPH0143968B2 JPH0143968B2 JP56202026A JP20202681A JPH0143968B2 JP H0143968 B2 JPH0143968 B2 JP H0143968B2 JP 56202026 A JP56202026 A JP 56202026A JP 20202681 A JP20202681 A JP 20202681A JP H0143968 B2 JPH0143968 B2 JP H0143968B2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- weight
- parts
- retardant
- ethylene
- 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.)
- Expired
Links
- 150000001875 compounds Chemical class 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 5
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000615 nonconductor Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 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 2
- 238000010521 absorption reaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000779 smoke Substances 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
- VETPHHXZEJAYOB-UHFFFAOYSA-N 1-n,4-n-dinaphthalen-2-ylbenzene-1,4-diamine Chemical compound C1=CC=CC2=CC(NC=3C=CC(NC=4C=C5C=CC=CC5=CC=4)=CC=3)=CC=C21 VETPHHXZEJAYOB-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- DZCCLNYLUGNUKQ-UHFFFAOYSA-N n-(4-nitrosophenyl)hydroxylamine Chemical compound ONC1=CC=C(N=O)C=C1 DZCCLNYLUGNUKQ-UHFFFAOYSA-N 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
本発明は、難燃性絶縁電線に係り、特に燃焼時
にハロゲンガスを発生しない難燃性絶縁材料を被
覆した絶縁電線に関するものである。
電線・ケーブルの絶縁材料としては、電気絶縁
性にすぐれたエチレンプロピレンコポリマやポリ
エチレンを主体とするポルマが多用されている。
最近の趨勢として原子力発電所用電線・ケーブ
ル、盤内、機内配線用電線に難燃性が強く要望さ
れるようになつてきた。
ポリマを難燃化する方法としては、ハロゲン含
有化合物、三酸化アンチモン、リン含有化合物な
どを混和する方法が用いられてきたが、これらは
火災時に多量の煙を出し、また、人体に有害なガ
スを発生するなどの問題がある。このような情勢
を踏まえ、発煙性が非常に少なく、有害なガスも
発生しない水和アルミナ等の無機含水化合物が注
目されるようになつてきた。しかし、難燃性を付
与するためには、無機含水化合物を多量に加える
必要があり、通常の無機含水化合物を用いると電
気的特性の低下を招くという問題を生じ、特に吸
水、吸湿による電気的特性の低下が大きな問題と
なつている。
本発明は上記に鑑みてなされたもので、その目
的とするところは、良好な電気的特性と難燃性を
有し、しかも、燃焼時に有害なハロゲン系ガスを
発生しない難燃性絶縁電線を提供することにあ
る。
本発明の難燃性絶縁電線は、エチレン系ポリマ
100重量部に対して、無機含水化合物100重量部以
上および2−メルカプトベンツイミダゾール0.1
重量部以上を含有する混和物よりなる難燃性電気
絶縁物を被覆してなることを特徴とするものであ
る。
本発明において、エチレン系ポリマとしてはエ
チレンプロピレンコポリマ、エチレンプロピレン
ジエンターポリマ、ポリエチレン、エチレン酢酸
ビニルコポリマ、エチレンエチルアクリレートコ
ポリマ、エチレンブテンコポリマなどがあげら
れ、これらは単独使用あるいは2種類以上の併用
が可能ある。
無機含水化合物としては、水和アルミナ、水酸
化マグネシウム、炭酸マグネシウム、ホウ酸亜鉛
などがあげられる。無機含水化合物は、エチレン
系ポリマ100重量部に対して100重量部以上含有さ
せる必要があり、これ以下では難燃性(JIS水平)
が不十分となる。
2−メルカプトベンツイミダゾールは、含水無
機化合物表面の水酸基が多量の水分を吸着して電
気的特性を低下させるのを抑制するために添加す
るものであり、添加量は、エチレン系ポリマ100
重量部に対して0.1重量部以上とする必要がある。
本発明においては、上記成分に加えて架橋剤、
酸化防止剤、滑剤、軟化剤、分散剤等を適宜添加
してもよい。架橋剤としては、ジクミルパーオキ
サイド、1,3−ビス(t−ブチルパーオキシイ
ソプロピル)ベンゼンに代表される有機過酸化物
が適切であり、これに架橋助剤として硫黄、エチ
レンメタアクリレート、ジアクリルフタレート、
p−キノンジオキシム等を併用してもよい。ま
た、酸化防止剤としては、フエニル−α−ナフチ
ルアミン、N,N′−ジ−β−ナフチル−p−フ
エニレンジアミン等のアミン系酸化防止剤、2,
6−ジ−t−ブチル−4−メチルフエノール、ヒ
ンダートフエノール等のフエノール系酸化防止剤
があげられる。
以下、本発明の実施例を比較例と対比しながら
説明する。
第1表に示すような配合に従つて調整した混和
物をロールで混練後、シリンダ温度を120℃に保
つた40m/m押出機(L/D=25)を用い、外径
2.0mmの銅線外周に1mm厚さで押出被覆した後、
13気圧のスチーム(温度約195℃)中に3分間保
持することにより架橋した。
実施例および比較例の絶縁電線の絶縁抵抗と難
燃性について評価した結果を第1表の下欄に示
す。なお、評価は次に基いて行つた。
絶縁抵抗:架橋後、80℃で24時間乾燥した直後の
もの(初期)と、乾燥後93%の雰囲気中に1カ
月放置した後のものについて、JISC3004に基
いて行つた。
難燃性:バーナによる燃焼で1分以内に消えれば
合格とし、1分以上燃えるものは不合格であ
る。
The present invention relates to a flame-retardant insulated wire, and particularly to an insulated wire coated with a flame-retardant insulating material that does not generate halogen gas when burned. Ethylene propylene copolymers and polyethylene-based polymers, which have excellent electrical insulation properties, are often used as insulating materials for electric wires and cables.
As a recent trend, there has been a strong demand for flame retardancy for electric wires and cables for nuclear power plants, and electric wires for wiring inside panels and inside machines. The methods used to make polymers flame retardant include mixing halogen-containing compounds, antimony trioxide, phosphorus-containing compounds, etc., but these produce a large amount of smoke in the event of a fire, and also emit gases harmful to the human body. There are problems such as . In light of this situation, inorganic hydrous compounds such as hydrated alumina, which generate very little smoke and do not emit harmful gases, have been attracting attention. However, in order to impart flame retardancy, it is necessary to add a large amount of inorganic water-containing compounds, and when ordinary inorganic water-containing compounds are used, there is a problem that the electrical properties deteriorate, especially due to water absorption and moisture absorption. Deterioration of characteristics has become a major problem. The present invention has been made in view of the above, and its purpose is to provide a flame-retardant insulated wire that has good electrical characteristics and flame retardancy, and does not generate harmful halogen gas when burned. It is about providing. The flame-retardant insulated wire of the present invention is made of ethylene polymer.
100 parts by weight or more of an inorganic hydrous compound and 0.1 part by weight of 2-mercaptobenzimidazole per 100 parts by weight
It is characterized by being coated with a flame-retardant electrical insulator made of a mixture containing at least part by weight. In the present invention, examples of the ethylene polymer include ethylene propylene copolymer, ethylene propylene diene terpolymer, polyethylene, ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, and ethylene butene copolymer, which may be used alone or in combination of two or more. It's possible. Examples of the inorganic hydrous compound include hydrated alumina, magnesium hydroxide, magnesium carbonate, and zinc borate. The inorganic hydrous compound must be contained in an amount of 100 parts by weight or more per 100 parts by weight of the ethylene polymer; anything less than this will result in flame retardancy (JIS horizontal).
becomes insufficient. 2-Mercaptobenzimidazole is added to prevent the hydroxyl groups on the surface of the hydrated inorganic compound from adsorbing a large amount of water and deteriorating the electrical properties.
It is necessary to make it 0.1 part by weight or more based on the weight part. In the present invention, in addition to the above components, a crosslinking agent,
Antioxidants, lubricants, softeners, dispersants, etc. may be added as appropriate. Suitable crosslinking agents include organic peroxides such as dicumyl peroxide and 1,3-bis(t-butylperoxyisopropyl)benzene, and sulfur, ethylene methacrylate, and dicumyl peroxide as crosslinking aids. acrylic phthalate,
p-quinone dioxime etc. may be used in combination. In addition, as antioxidants, amine antioxidants such as phenyl-α-naphthylamine, N,N′-di-β-naphthyl-p-phenylenediamine, 2,
Examples include phenolic antioxidants such as 6-di-t-butyl-4-methylphenol and hindered phenol. Examples of the present invention will be described below while comparing them with comparative examples. After kneading the mixture prepared according to the formulation shown in Table 1 with a roll, the outer diameter was
After coating the outer circumference of the 2.0mm copper wire with a thickness of 1mm,
Crosslinking was carried out by holding in steam at 13 atmospheres (temperature approximately 195°C) for 3 minutes. The results of evaluating the insulation resistance and flame retardance of the insulated wires of Examples and Comparative Examples are shown in the lower column of Table 1. The evaluation was based on the following. Insulation resistance: Insulation resistance was measured based on JISC3004 for the product immediately after drying at 80°C for 24 hours after crosslinking (initial stage) and after being left in a 93% atmosphere for one month after drying. Flame retardancy: If the flame is extinguished within 1 minute when burned with a burner, it is passed; if it burns for more than 1 minute, it is rejected.
【表】
第1表から明らかな通り、本発明に係る実施例
1〜5では、いずれも湿度93%の雰囲気中に放置
した後も絶縁抵抗の低下が小さく、難燃性はJIS
水平に合格している。
これに対し、比較例1のものは無機含水化合物
の含有量が規定値以上であるため難燃性が不合格
であり、比較例2のものは2−メルカプトベンツ
イミダゾールの添加量が規定値以下であるため、
湿度93%の雰囲気中に放置後の絶縁抵抗の低下が
著しい。
以上説明してきた通り、本発明によれば良好な
電気的特性と難燃性を有し、しかも、燃焼時に有
害なハロゲン系ガスを発生しない絶縁電線が得ら
れるようになる。[Table] As is clear from Table 1, in Examples 1 to 5 according to the present invention, the decrease in insulation resistance was small even after being left in an atmosphere with a humidity of 93%, and the flame retardance was JIS
Passed level. On the other hand, in Comparative Example 1, the content of inorganic hydrous compounds exceeds the specified value, so the flame retardance is rejected, and in Comparative Example 2, the amount of 2-mercaptobenzimidazole added is below the specified value. Therefore,
The insulation resistance decreases significantly after being left in an atmosphere with a humidity of 93%. As explained above, according to the present invention, it is possible to obtain an insulated wire that has good electrical properties and flame retardancy, and does not generate harmful halogen gas when burned.
Claims (1)
含水化合物100重量部以上および2−メルカプト
ベンツイミダゾール0.1重量部以上を含有する混
和物よりなる難燃性電気絶縁物を被覆してなるこ
とを特徴とする難燃性絶縁電線。1. It is characterized by being coated with a flame-retardant electrical insulator made of a mixture containing 100 parts by weight or more of an inorganic hydrous compound and 0.1 parts by weight or more of 2-mercaptobenzimidazole per 100 parts by weight of an ethylene polymer. Flame-retardant insulated wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56202026A JPS58103705A (en) | 1981-12-15 | 1981-12-15 | Flame resistant insulated wire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56202026A JPS58103705A (en) | 1981-12-15 | 1981-12-15 | Flame resistant insulated wire |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58103705A JPS58103705A (en) | 1983-06-20 |
JPH0143968B2 true JPH0143968B2 (en) | 1989-09-25 |
Family
ID=16450686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56202026A Granted JPS58103705A (en) | 1981-12-15 | 1981-12-15 | Flame resistant insulated wire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58103705A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6032715U (en) * | 1983-08-11 | 1985-03-06 | 昭和電線電纜株式会社 | fireproof wire |
CA1332487C (en) * | 1987-06-23 | 1994-10-11 | Yasuaki Yamamoto | Flame retardant electrical insulating composition having antifungal action |
JPH0581936A (en) * | 1991-09-24 | 1993-04-02 | Hitachi Cable Ltd | Adhesive flame resistance cross-linked insulated wire |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5580449A (en) * | 1978-12-01 | 1980-06-17 | Gen Electric | Polyolefin compound with improved thermosetting stability* improving heat aging property* and conductor insulated by using same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5928574Y2 (en) * | 1979-02-15 | 1984-08-17 | 住友電気工業株式会社 | flame retardant cable |
-
1981
- 1981-12-15 JP JP56202026A patent/JPS58103705A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5580449A (en) * | 1978-12-01 | 1980-06-17 | Gen Electric | Polyolefin compound with improved thermosetting stability* improving heat aging property* and conductor insulated by using same |
Also Published As
Publication number | Publication date |
---|---|
JPS58103705A (en) | 1983-06-20 |
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