JPH0345638A - Flame-retardant electrical insulation composition - Google Patents
Flame-retardant electrical insulation compositionInfo
- Publication number
- JPH0345638A JPH0345638A JP1183344A JP18334489A JPH0345638A JP H0345638 A JPH0345638 A JP H0345638A JP 1183344 A JP1183344 A JP 1183344A JP 18334489 A JP18334489 A JP 18334489A JP H0345638 A JPH0345638 A JP H0345638A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- retardant
- flame retardant
- dimethylpolysiloxane
- 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.)
- Pending
Links
- 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 title claims abstract description 17
- 239000003063 flame retardant Substances 0.000 title claims abstract description 17
- 239000000203 mixture Substances 0.000 title claims description 13
- 238000010292 electrical insulation Methods 0.000 title description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 11
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract description 11
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 11
- 239000000155 melt Substances 0.000 claims abstract description 7
- 239000012796 inorganic flame retardant Substances 0.000 claims description 12
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 abstract description 9
- 150000002367 halogens Chemical class 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 8
- 239000003963 antioxidant agent Substances 0.000 abstract description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 abstract description 3
- 239000000347 magnesium hydroxide Substances 0.000 abstract description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract description 3
- -1 magnesium hydroxide) Chemical compound 0.000 abstract description 3
- 230000003078 antioxidant effect Effects 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 229920005672 polyolefin resin Polymers 0.000 abstract 2
- 239000004971 Cross linker Substances 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 1
- 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
- KCSOBOZCMQBPFM-UHFFFAOYSA-N 4-n,4-n-dinaphthalen-2-ylbenzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1N(C=1C=C2C=CC=CC2=CC=1)C1=CC=C(C=CC=C2)C2=C1 KCSOBOZCMQBPFM-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 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
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 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
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000001050 lubricating effect Effects 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 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
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、燃焼時に有害なハロゲン系ガスを発性しない
難燃性電気絶縁組成物、特に電線・ケーブルの絶縁材料
やシース材料への適用に好適な難燃性電気絶縁組成物に
間するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to flame-retardant electrical insulation compositions that do not emit harmful halogen gases when burned, particularly to insulating materials and sheath materials for electric wires and cables. It is a flame retardant electrical insulating composition suitable for.
［従来の技術］
電気絶縁性に優れているところから多用されているポリ
オレフィンをはじめ、従来電線・ケーブルの絶縁体やシ
ースとして使用されてきた材料は、いずれも可燃性のも
のであり、火災が発生した場合には、電線・ケーブルの
配線系を伝わって火災が拡大する例が多く、難燃性の電
線・ケーブルへの要請かにわかに高まってきた。とくに
、最近のすう勢として原子力発電所用電線・ケーブル、
車両用を線・ケーブル、船舶用電線・ケーブルなどには
、ＩＥＥＥ＜米国電気電子技術者協会）規格３８３のＶ
ｉ’ＦＴ（垂直トレイ燃焼試験）に規定されている実際
の布設状況を模擬した多条布設の燃焼試験に合格するこ
とを条件とする高度の難燃性が要望されるようになって
きた。[Conventional technology] Materials traditionally used as insulators and sheaths for electric wires and cables, including polyolefin, which is widely used due to its excellent electrical insulation properties, are all flammable and can cause fires. When a fire occurs, there are many cases in which the fire spreads through the wiring system of electric wires and cables, and the demand for flame-retardant electric wires and cables has suddenly increased. In particular, as a recent trend, electric wires and cables for nuclear power plants,
IEEE (Institute of Electrical and Electronics Engineers) Standard 383 V is used for wires and cables for vehicles, electric wires and cables for ships, etc.
A high level of flame retardancy is now required, which is required to pass a multi-strand installation combustion test that simulates actual installation conditions as stipulated by i'FT (Vertical Tray Combustion Test).
ポリオレフィンを難燃化する方法としてはハ冑ゲン含有
化合物等を混和する方法が一般に採用されてきている。As a method of making polyolefin flame retardant, a method of incorporating a halogen-containing compound or the like has generally been adopted.
しかし、このような難燃性電気絶縁組成物は、火災時に
不燃性のハロゲン系ガス等を多量に発生させ、それによ
りｔｌｌ・ケーブルの周囲における酸素を遮断し燃焼を
防止しようとするものであり、十分な難燃特性を発揮す
るものの、その折発生するハロゲン系ガス等は例えば塩
化水素のように有毒なものが多く、このような有毒ガス
を含んだ煙を多量に発生させるため見通しが悪くなり、
火災発生の際のｆ！ｉ！！行動や消火活動を妨げ、ある
いは前記有毒ガスが人体に悪影響を与えるなどして二次
災害のおそれもあり、さらにはハロゲン系ガスが空気中
の水分と反応し、ハロゲン化水素酸となって機器等を腐
食させるおそれもある。However, such flame-retardant electrical insulation compositions generate a large amount of nonflammable halogen-based gas in the event of a fire, thereby blocking oxygen around the TLL/cable and preventing combustion. Although it exhibits sufficient flame retardant properties, many of the halogen-based gases generated are toxic, such as hydrogen chloride, and visibility is poor because it generates a large amount of smoke containing such toxic gases. Become,
f! in the event of a fire! i! ! There is a risk of secondary disasters such as interfering with actions and firefighting activities, or the toxic gases have a negative effect on the human body.Furthermore, halogen gases react with moisture in the air and turn into hydrohalic acid, which can damage equipment. There is also a risk of corrosion.
そこで、上記ハロゲン系化合物に代えて、水酸化アルミ
ニウムや水酸化マグネシウム等の無機系難燃剤を混和し
、上記火災時の安全性を重視した難燃性電気絶縁組成物
が提案され、注目を集めている。Therefore, a flame-retardant electrical insulating composition was proposed, in which an inorganic flame retardant such as aluminum hydroxide or magnesium hydroxide was mixed in place of the above-mentioned halogen-based compound, and which focused on safety in the event of a fire. ing.
［発明が解決しようとする課１１］
上記無機系難燃剤を混和した難燃性組成物は、火災時に
当該水酸化物が結晶水を放出する際の吸熱作用を難燃効
果として利用するものであり、発煙性や轡性あるいは腐
食性は極めて少ない。[Question 11 to be solved by the invention] The flame retardant composition containing the above-mentioned inorganic flame retardant utilizes the endothermic action of the hydroxide when it releases crystal water in the event of a fire as a flame retardant effect. Yes, it has very little smoke, staleness, or corrosiveness.
しかしながら、無機系難燃剤は難燃効果が小さいため、
中にポリマーに混和しただけでは燃焼時に溶融滴下する
というドリップ現象がみられ、高度の難燃性を付与する
ことは難しい。However, since inorganic flame retardants have a small flame retardant effect,
If it is simply mixed with a polymer, a drip phenomenon occurs in which the melt drips during combustion, making it difficult to impart a high degree of flame retardancy.
従って、高度の難燃性を付与するためには無機系難燃剤
を多量に加えることが必要であり、その結果として得ら
れる絶縁体やシースの引張特性の低下を招いたり、押出
加工性が低下するという問題がある。Therefore, in order to impart a high degree of flame retardancy, it is necessary to add a large amount of inorganic flame retardant, which may result in a decrease in the tensile properties of the resulting insulator or sheath, and a decrease in extrusion processability. There is a problem with doing so.
本発明の目的は、上記したような従来技術の問題点を解
消し、有害なハロゲン系ガスを発生しない無機系難燃剤
を混和し垂直トレイ燃焼試験レベルに合格する高度の難
燃性を発揮させると共に、その機械的特性および押出加
工性を保持し得る難燃性電気絶縁組成物を提供しようと
するものである。The purpose of the present invention is to solve the problems of the prior art as described above, and to achieve high flame retardancy that passes the vertical tray combustion test level by incorporating an inorganic flame retardant that does not generate harmful halogen gases. In addition, the present invention aims to provide a flame-retardant electrical insulation composition that can maintain its mechanical properties and extrudability.
［課題を解決するための手段］
本発明は、ポリオレフィン１００重量部に対して無機系
難燃剤５０〜３００重量部、及び溶融粘度（２３℃）が
ｌＸ１０５〜５×１０９センチポイズで末端が水酸基で
あるジメチルボリシｎキサン１〜２０重量部を含有せし
めたものである。[Means for Solving the Problems] The present invention includes 50 to 300 parts by weight of an inorganic flame retardant per 100 parts by weight of polyolefin, a melt viscosity (at 23° C.) of lx105 to 5x109 centipoise, and a hydroxyl group at the end. It contains 1 to 20 parts by weight of dimethylborisin-xane.
本発明において、ポリオレフィンとしては、エチレン７
ｒ７ビレンコボリマー、エチレンプロビレンジエンター
ボリマー、ポリエチレン、エチレン＃酸ビニルコポリマ
ー、エチレンヱチルアクリレートコボリマー、エチレン
ブテンコポリマー、エチＩ／ンブテンジエンターボリマ
ー等が挙げられ、これらは学独使用又は２種以上の併用
が可能である。In the present invention, the polyolefin is ethylene 7
Examples include r7 birene copolymer, ethylene propylene diene copolymer, polyethylene, ethylene vinyl acid copolymer, ethylene ethyl acrylate copolymer, ethylene butene copolymer, ethyl/butene diene copolymer, etc., which are used by academics or two types. A combination of the above is possible.
無機系難燃剤としては、水酸化アルミニラＪ１、水酸化
マグネシウム、塩基性炭酸マグネシウム、水酸化カルシ
ウム、ハイドロタルサイト類等が挙げられる。無機系難
燃剤の含有量は、ポリオレフィン１００重量部に対して
５０〜３００重量部の範囲とする必要があり、５０重量
部未満では目的とする難燃性を付与できず、３００重量
部を越えると加工性か著しく低下して押出成形が困難に
なる。Examples of inorganic flame retardants include aluminum hydroxide J1, magnesium hydroxide, basic magnesium carbonate, calcium hydroxide, and hydrotalcites. The content of the inorganic flame retardant must be in the range of 50 to 300 parts by weight per 100 parts by weight of the polyolefin; if it is less than 50 parts by weight, the desired flame retardancy cannot be imparted, and if it exceeds 300 parts by weight. The processability deteriorates significantly, making extrusion molding difficult.
発明者らは、上記無機系難燃剤に加えて溶融粘度〈２３
℃ンがＩ Ｘ １０Ｓ〜５×１０”センチボイスで末端
が水酸基であるジメチルボリンｎキサンを併用すること
により燃焼時のドリップを防止でき、難燃性を大巾に向
上できることを見出し、本発明を達成するに到ったもの
である。末端が水酸基であるジメチルポリシロキサン）
はポリオレフィン１００ｆ！量部に対して１〜２０重量
部配置部る必要があり、１重量部未満では燃焼時のドリ
ップを防止できず、難燃性が不十分となる。２０重１部
を越えると押出加工性が悪くなる。さらに、ジメチルポ
リシロキサンの溶融粘度（２３℃）がＩ Ｘ １０Ｓセ
ンチポイズ未満、では、このものの滑性効果により押出
加工性が悪くなり、また５×１０’センチポイズを越え
るとこのものの材料中における分散性が悪くなり難燃性
が不十分となる。In addition to the above-mentioned inorganic flame retardant, the inventors discovered that melt viscosity <23
It has been discovered that dripping during combustion can be prevented and flame retardancy can be greatly improved by using dimethylborine n-xane, which has a temperature of IX 10S to 5 x 10" centivoice and has a hydroxyl group at the end, and has developed the present invention. (Dimethylpolysiloxane with hydroxyl group at the end)
is polyolefin 100f! It is necessary to arrange 1 to 20 parts by weight per part by weight, and if it is less than 1 part by weight, dripping during combustion cannot be prevented, resulting in insufficient flame retardancy. When the amount exceeds 1 part by weight, extrusion processability deteriorates. Furthermore, if the melt viscosity (23°C) of dimethylpolysiloxane is less than I x 10S centipoise, the extrusion processability will be poor due to the lubricating effect of the dimethylpolysiloxane, and if it exceeds 5 x 10' centipoise, the dispersibility in the material will deteriorate. This results in poor flame retardancy.
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、３−ビス〈ｔ
−プチルパーオキシイソプロピルンベンゼンに代表され
る有機過酸化物が適当であり、これに架橋助剤として、
硫黄、エチレンジメタクリレート、ジアリルフタレート
、ｐ −キノンジオキシム等を併用してもよい、又、電
子線等の電離性放射線による架橋の場合は、架橋助剤と
してトリメチロールプロパントリメリテート、トリアリ
ルイソシアヌレート等の反応性のモノマーを添加するの
が一般的である。酸化防止剤としては、フェニル−α−
ナフチルアミン、Ｎ、Ｎ−−ジーβ−ナフチルーｐ−フ
ェニレンジアミン等のアミン系酸化防止剤、２．６−ジ
ーｔ−ブチル−４−メチルフェノール、ヒンダードフェ
ノール等のフェノール系酸化防止剤が挙げられる。In the present invention, in addition to the above components, crosslinking agents, antioxidants, lubricants, softeners, dispersants, etc. may be added as appropriate. Examples of crosslinking agents include dicumyl peroxide, 3-bis<t
- An organic peroxide represented by butylperoxyisopropylenebenzene is suitable, and as a crosslinking aid,
Sulfur, ethylene dimethacrylate, diallyl phthalate, p-quinone dioxime, etc. may be used in combination, and in the case of crosslinking using ionizing radiation such as electron beams, trimethylolpropane trimellitate, triallyl, etc. may be used as a crosslinking aid. It is common to add reactive monomers such as isocyanurates. As an antioxidant, phenyl-α-
Examples include amine antioxidants such as naphthylamine, N,N-di-β-naphthyl-p-phenylenediamine, and phenolic antioxidants such as 2,6-di-t-butyl-4-methylphenol and hindered phenol. .
［実施例］
以下に、本発明について実施例および比較例を参照し説
明する。[Examples] The present invention will be described below with reference to Examples and Comparative Examples.
第１表に示す実施例１〜４および比較例１〜８の各供試
配合成分よりなる組成物を用い、第１表下欄に示す評価
項目について評価試験を行なった。Using compositions consisting of the test components of Examples 1 to 4 and Comparative Examples 1 to 8 shown in Table 1, an evaluation test was conducted on the evaluation items shown in the lower column of Table 1.
各配合成分を１００℃に保持された６インチロールに投
入してロール混線を行ない、混練後１２０℃に保持され
た４０ｍ／ｍ押出１！（Ｌ／Ｄ＝２５）を用い、外径５
．３ｍｓの絶縁線心を３本撚合せた外周に２．０ｍ＋の
厚さで押出被覆した。Each compounded component was put into a 6-inch roll maintained at 100°C and mixed with the rolls, and after kneading, the mixture was extruded at 40 m/m held at 120°C. (L/D=25), outer diameter 5
．． The outer periphery of three 3ms insulated wire cores twisted together was coated by extrusion to a thickness of 2.0m+.
なお、実施例１及び比較例１については押出被覆に続い
て１３ｋｇ／ｃｄの水蒸気雰囲気中に３分間保持して架
橋した。In addition, for Example 1 and Comparative Example 1, following extrusion coating, crosslinking was carried out by holding in a steam atmosphere of 13 kg/cd for 3 minutes.
難燃性評価は次のようにして行なった。長さ２ｍのケー
ブルを垂直に８本ならべ、下から７０．０ＯＯＢＴＵの
炎を２０分間当て、自己消炎すれば合格であり、自己消
炎せず全焼するものは不合格とした。Flame retardancy evaluation was performed as follows. Eight cables each having a length of 2 m were lined up vertically, and a flame of 70.0 OOBTU was applied from below for 20 minutes, and if the flame self-extinguished, it was passed, and if it did not self-extinguish and burned down, it was rejected.
第１表に各供試組成物の評価結果を示す。Table 1 shows the evaluation results for each sample composition.
表からも明らかな通り、本発明に係る実施例１〜４はい
ずれも難燃性に合格し、押出加工性に優れている。これ
に対し、無機系難燃剤の含有量が規定値以下の比較例１
は難燃性が不合格であり、規定値以上の比較例２は押出
性が悪く成形不可能であった。As is clear from the table, Examples 1 to 4 according to the present invention all passed the flame retardance test and were excellent in extrusion processability. In contrast, Comparative Example 1 in which the content of inorganic flame retardant is below the specified value
The flame retardance of Comparative Example 2, which was higher than the specified value, had poor extrudability and could not be molded.
ジメチルポリシロキサンの含有量が規定値以下の比較例
３はドリップが生じて難燃性が不合格となった。また、
ジメチルポリシロキサンの含有量が規定値以上の比較例
４では押出性が悪く成形不可能であった。一方、ジメチ
ルポリシロキサンの溶融粘度（２３℃）が規定値以下の
比較例５では加工性が悪く成形不可能であった。また、
溶融粘度が規定値以上の比較例６では難燃性が不合格と
なった。さらに、ジメチルポリシロキサン以外のメチル
フェニルポリシロキサン、あるいはメチルビニルポリシ
ロキサンを使用している比較例７゜８では燃焼時ドリッ
プが生じて難燃性が不合格となった。In Comparative Example 3 in which the content of dimethylpolysiloxane was below the specified value, dripping occurred and the flame retardance was rejected. Also,
In Comparative Example 4 in which the content of dimethylpolysiloxane was higher than the specified value, extrudability was poor and molding was impossible. On the other hand, in Comparative Example 5 in which the melt viscosity (23° C.) of dimethylpolysiloxane was below the specified value, processability was poor and molding was impossible. Also,
Comparative Example 6, in which the melt viscosity was higher than the specified value, failed in terms of flame retardancy. Furthermore, in Comparative Example 7.8 in which methylphenylpolysiloxane other than dimethylpolysiloxane or methylvinylpolysiloxane was used, dripping occurred during combustion and the flame retardance was rejected.
［発明の効果］
以上説明してきた通り、本発明に係る組成物によれば、
難燃剤として無機系難燃剤と溶融粘度（２３℃）が１×
１０１ｓ〜５×１０９センチポイズで末端が水酸基であ
るジメチルポリシロキサンを併用し、良好な押出加工性
を維持しながら燃焼時のドリップを防止して高度の難燃
性を付与することができ、しかも燃焼時に有毒なハロゲ
ン系ガスを発生しない電気絶縁組成物を得ることができ
る。[Effect of the invention] As explained above, according to the composition according to the present invention,
Inorganic flame retardant as flame retardant and melt viscosity (23℃) 1×
By using dimethylpolysiloxane with a size of 101s to 5 x 109 centipoise and a hydroxyl group at the end, it is possible to prevent drips during combustion while maintaining good extrusion processability, giving a high degree of flame retardancy. It is possible to obtain an electrical insulating composition that does not generate sometimes toxic halogen-based gases.
Claims (1)
剤５０〜３００重量部、及び溶融粘度（２３℃）が１×
１０＾５〜５×１０＾９センチポイズで末端が水酸基で
あるジメチルポリシロキサン１〜２０重量部を含有せし
めてなる難燃性電気絶縁組成物。(1) 50 to 300 parts by weight of an inorganic flame retardant per 100 parts by weight of polyolefin, and a melt viscosity (23°C) of 1×
A flame-retardant electrical insulating composition containing 1 to 20 parts by weight of dimethylpolysiloxane having a size of 10^5 to 5 x 10^9 centipoise and a hydroxyl group at the end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1183344A JPH0345638A (en) | 1989-07-14 | 1989-07-14 | Flame-retardant electrical insulation composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1183344A JPH0345638A (en) | 1989-07-14 | 1989-07-14 | Flame-retardant electrical insulation composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0345638A true JPH0345638A (en) | 1991-02-27 |
Family
ID=16134087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1183344A Pending JPH0345638A (en) | 1989-07-14 | 1989-07-14 | Flame-retardant electrical insulation composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0345638A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517632A (en) * | 1991-07-09 | 1993-01-26 | Sekisui Chem Co Ltd | Resin composition highly filled with inorganic substance and its production |
| US6653571B1 (en) * | 1997-07-30 | 2003-11-25 | Tyco Electronics | High voltage electrical insulation material |
| US7115678B2 (en) * | 2001-05-16 | 2006-10-03 | Shin-Etsu Chemical Co., Ltd. | Flame-retardant resin composition free from halogen |
| JP4615075B2 (en) * | 1998-12-28 | 2011-01-19 | 株式会社フジクラ | Non-halogen flame retardant resin composition and flame retardant wire / cable |
| JP2014101454A (en) * | 2012-11-20 | 2014-06-05 | Hitachi Metals Ltd | Non-halogen crosslinked resin composition and insulated wire, cable |
-
1989
- 1989-07-14 JP JP1183344A patent/JPH0345638A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517632A (en) * | 1991-07-09 | 1993-01-26 | Sekisui Chem Co Ltd | Resin composition highly filled with inorganic substance and its production |
| US6653571B1 (en) * | 1997-07-30 | 2003-11-25 | Tyco Electronics | High voltage electrical insulation material |
| JP4615075B2 (en) * | 1998-12-28 | 2011-01-19 | 株式会社フジクラ | Non-halogen flame retardant resin composition and flame retardant wire / cable |
| US7115678B2 (en) * | 2001-05-16 | 2006-10-03 | Shin-Etsu Chemical Co., Ltd. | Flame-retardant resin composition free from halogen |
| US7368495B2 (en) | 2001-05-16 | 2008-05-06 | Shin-Etsu Chemical Co., Ltd. | Flame-retardant resin composition free from halogen |
| JP2014101454A (en) * | 2012-11-20 | 2014-06-05 | Hitachi Metals Ltd | Non-halogen crosslinked resin composition and insulated wire, cable |
| US9805840B2 (en) | 2012-11-20 | 2017-10-31 | Hitachi Metals, Ltd. | Halogen-free crosslinked resin composition and insulated wire and cable using the same |
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