JP2527103B2 - Flame retardant electrical insulation composition - Google Patents
Flame retardant electrical insulation compositionInfo
- Publication number
- JP2527103B2 JP2527103B2 JP2325677A JP32567790A JP2527103B2 JP 2527103 B2 JP2527103 B2 JP 2527103B2 JP 2325677 A JP2325677 A JP 2325677A JP 32567790 A JP32567790 A JP 32567790A JP 2527103 B2 JP2527103 B2 JP 2527103B2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- weight
- parts
- vinyl acetate
- acetate copolymer
- 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 - Lifetime
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- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、高度の難燃性を有すると共に、機械特性に
優れている難燃性電気絶縁組成物に関するものである。TECHNICAL FIELD The present invention relates to a flame-retardant electrical insulating composition having high flame retardancy and excellent mechanical properties.
［従来の技術］ 最近、電線・ケーブルを中心に難燃性の要求が高度化
し、ULVW−１の垂直燃焼試験やIEEE規格383、IEC規格33
2等の垂直トレイ燃焼試験レベルの高難燃材料が要望さ
れるようになってきた。[Prior Art] Recently, the demand for flame retardancy has increased, especially in electric wires and cables, and ULVW-1 vertical combustion tests and IEEE Standard 383, IEC Standard 33
There has been a growing demand for high flame-retardant materials such as vertical tray combustion test levels such as 2nd grade.
絶縁材料であるポリオレフィンを難燃化する方法とし
てはハロ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 for making polyolefin, which is an insulating material, flame-retardant, a method of mixing a halogen-containing compound or the like has been generally 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
より電線・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、その折発生するハロゲン系ガス等は例えば塩化
水素のような有毒なものが多く、このような有機ガスを
含んだ煙を多量に発生させるため見通しが悪くなり、火
災発生の際の非難行動や消化活動を妨げ、あるいは蒸気
有毒ガスが人体に悪影響を与えるなどして二次火災のお
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 a flame-retardant electrical insulating composition is intended to prevent the combustion by generating a large amount of non-flammable halogen-based gas or the like in the event of a fire, thereby shutting off oxygen around the wires and cables. , Those that exhibit sufficient flame retardant properties, and the halogen-based gases, etc. that are generated at that time are often toxic, such as hydrogen chloride, and the visibility is poor because a large amount of smoke containing such organic gas is generated. There is also the risk of a secondary fire, such as blaming actions and fire extinguishing activities when a fire occurs, or vapor poisonous gas adversely affects the human body, and halogen gas reacts with moisture in the air. There is also a risk that it will become hydrohalic acid and will corrode equipment and the like.
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金属水酸化物を混和
し、上記火災時の安全性を重視した難燃性電気絶縁組成
物を絶縁体とした電線・ケーブルが提案され、注目を集
めている。Therefore, in place of the halogen-based compound, a metal hydroxide such as aluminum hydroxide or magnesium hydroxide is mixed, and an electric wire using a flame-retardant electrical insulation composition as an insulator, which emphasizes safety in the case of a fire. Cables have been proposed and are attracting attention.
この金属水酸化物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により
難燃性を付与するものであり、発煙性や毒性あるいは腐
蝕性が極めて低い。The flame-retardant composition mixed with this metal hydroxide imparts flame retardancy by the endothermic action when the hydroxide releases crystal water in the event of a fire, and has smoke-producing property, toxicity or corrosive property. Extremely low.
［発明が解決しようとする課題］ しかしながら、上記難燃性電気絶縁組成物にあって
は、金属水酸化物の難燃効果が小さいため、上記した各
燃焼試験に適合する高度の難燃性を付与するためには、
金属水酸化物を多量に混和する必要があり、その結果、
引張特性等の機械特性が著しく低下するという問題があ
る。[Problems to be Solved by the Invention] However, in the flame-retardant electrical insulating composition, since the flame retardant effect of the metal hydroxide is small, a high degree of flame retardance suitable for each of the above combustion tests is obtained. To give,
It is necessary to mix a large amount of metal hydroxide, which results in
There is a problem that mechanical properties such as tensile properties are significantly reduced.
本発明の目的は、上記した従来技術の問題点を解消
し、垂直燃焼試験レベルに合格する高度の難燃性を付与
すると共に、機械特性に優れた難燃性電気絶縁組成物を
提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art, to impart a high degree of flame retardance that passes the vertical combustion test level, and to provide a flame retardant electrical insulating composition having excellent mechanical properties. It is in.
［課題を解決するための手段及び作用］ 本発明者らは、金属水酸化物を混和して、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材料の知見
を基に、難燃性を有し、かつ機械特性に優れている難燃
性電気絶縁組成物を得るために種々の研究開発を実施し
た結果、エチレン酢酸ビニルコポリマまたはエチレン酢
酸ビニルコポリマとポリオレフィンとのブレンドポリマ
に、水酸化物と鉛丹とを配合することを見出し、これら
化合物の含有量の範囲を特定したのである。[Means and Actions for Solving the Problems] The inventors of the present invention, based on the knowledge of a flame-retardant insulating material that does not generate a harmful halogen-based gas during combustion by mixing a metal hydroxide, As a result of conducting various research and development in order to obtain a flame-retardant electrical insulating composition having excellent mechanical properties, ethylene vinyl acetate copolymer or a blended polymer of ethylene vinyl acetate copolymer and polyolefin is It was found that a substance and red lead were blended, and the range of the content of these compounds was specified.
すなわち、本発明の難燃性電気絶縁組成物は、エチレ
ン酢酸ビニルコポリマまたはエチレン酢酸ビニルコポリ
マとポリオレフィンとのブレンドポリマ100重量部に対
して、金属水酸化物を50〜300重量部及び鉛丹を１〜50
重量部配合したものであり、また、エチレン酢酸ビニル
コポリマまたはエチレン酢酸ビニルコポリマとポリオレ
フィンとのブレンドポリマ100重量部に対して、金属水
酸化物を50〜300重量部及び表面処理した鉛丹を１〜50
重量部配合したものである。That is, the flame-retardant electrical insulating composition of the present invention, 100 parts by weight of ethylene vinyl acetate copolymer or a blend polymer of ethylene vinyl acetate copolymer and polyolefin, metal hydroxide 50 to 300 parts by weight and lead tin. 1-50
50 parts by weight of metal hydroxide and 1 part of surface-treated lead tin oxide are added to 100 parts by weight of ethylene vinyl acetate copolymer or a blend polymer of ethylene vinyl acetate copolymer and polyolefin. ~ 50
It is a mixture of parts by weight.
本発明においてはポリオレフィンとしては、エチレン
プロピレンゴム，エチレンブテンコポリマ，エチレンエ
チルアクリレートコポリマ，エチレンメチルアクリレー
トコポリマ，エチレンメチルメタクリレートコポリマと
いったものが挙がられ、これらをエチレン酢酸ビニルコ
ポリマと併用する。In the present invention, examples of the polyolefin include ethylene propylene rubber, ethylene butene copolymer, ethylene ethyl acrylate copolymer, ethylene methyl acrylate copolymer, ethylene methyl methacrylate copolymer, and these are used together with ethylene vinyl acetate copolymer.
金属水酸化物としては、高難燃化の点から水酸化マグ
ネシウムおよびハイドロタルサイト類が望ましく、これ
は凝集，強靭性，難燃性，耐水性等から平均粒径0.1〜
５μｍで脂肪酸金属塩，シランカップリング剤，チタネ
ートカップリング剤等で表面処理したものを用いるのが
好ましい。As the metal hydroxide, magnesium hydroxide and hydrotalcites are preferable from the viewpoint of high flame retardancy, and they have an average particle size of 0.1 to 10 in terms of aggregation, toughness, flame retardancy, water resistance, etc.
It is preferable to use those having a surface treatment of 5 μm with a fatty acid metal salt, a silane coupling agent, a titanate coupling agent or the like.
金属水酸化物の配合量は、エチレン酢酸ビニル共重合
体またはポリオレフィンとの併用から成るブレンドポリ
マ100重量部に対して、金属水酸化物を50〜300重量部と
する必要があり、配合量が限定値未満では目的とする難
燃性を付与できず、限定値を越えた場合には加工性や強
靭性を著しく損なう。The amount of the metal hydroxide to be blended should be 50 to 300 parts by weight of the metal hydroxide with respect to 100 parts by weight of the blend polymer composed of the ethylene vinyl acetate copolymer or the polyolefin in combination. If it is less than the specified value, the desired flame retardancy cannot be imparted, and if it exceeds the specified value, workability and toughness are significantly impaired.
本発明では、鉛丹を加えることにより、著しく難燃性
が向上することを見い出した。これはエチレン酢酸ビニ
ルコポリマの脱酢酸が鉛丹により促進されるものと推定
される。この鉛丹は、ブレンドポリマ100重量部に対し
て１〜50重量部含有させる必要があり、限定未満では目
的とする難燃性への効果が認められず、また限定値を越
えると耐熱老化性を著しく損なう。In the present invention, it has been found that flame retardancy is significantly improved by adding red lead. It is presumed that the deacetic acid of ethylene vinyl acetate copolymer is promoted by red lead. This lead tin must be contained in an amount of 1 to 50 parts by weight with respect to 100 parts by weight of the blended polymer. If it is less than the limit, the desired flame retardancy is not observed, and if it exceeds the limit, heat aging resistance is exceeded. Significantly impairs.
また、鉛丹は、耐熱老化性を著しく低下させることが
あり、種々検討した結果、鉛丹を表面処理することが有
効なことが分った。In addition, red lead may significantly reduce the heat aging resistance, and as a result of various studies, it was found that surface treatment of red lead is effective.
この表面処理は、フェノール樹脂又はモース硬度３以
下の白色充填剤等を用いて行われるものがある。前者の
フェノール樹脂の表面処理としては、鉛丹を水に懸濁さ
せ、その中にフェノールとホルマリンを添加し80℃で攪
拌後、更にリン酸を加えて行う方法が代表的である。後
者の白色充填剤の表面処理としては、摩砕処理を利用し
た方法が有効で、鉛丹と上述の白色充填剤を高速回転の
回転羽根に当て処理する方法が代表的である。This surface treatment may be performed using a phenol resin or a white filler having a Mohs hardness of 3 or less. As the surface treatment of the former phenol resin, a typical method is to suspend red lead in water, add phenol and formalin therein, stir at 80 ° C., and then add phosphoric acid. As the surface treatment of the latter white filler, a method utilizing grinding treatment is effective, and a typical method is to apply red lead and the above-mentioned white filler to a rotating blade rotating at high speed.
これらのようにして表面処理した鉛丹は、ブレンドポ
リマ100重量部に対して１〜50重量部の範囲で含有させ
る必要があり、限定値未満では目的とする難燃性への効
果が認められず、また限定値を越えると耐熱老化性を著
しく損なう。The surface-treated lead tin oxide must be contained in the range of 1 to 50 parts by weight with respect to 100 parts by weight of the blended polymer, and if it is less than the limited value, the effect on the intended flame retardancy is recognized. If it exceeds the limit value, the heat aging resistance is significantly impaired.
本発明では、上記成分に加えて酸化防止剤，滑剤，分
散剤，着色剤等を適宜添加してもよく、これらから成る
組成物は有機過酸化物による加熱架橋あるいは照射架橋
等を施される。In the present invention, in addition to the above components, antioxidants, lubricants, dispersants, colorants and the like may be appropriately added, and the composition composed of these is subjected to heat crosslinking or irradiation crosslinking with an organic peroxide. .
過酸化物としてはジクミルパーオキサイド,1,3−ビス
（第三ブチル・パーオキシ・イソプロピル）ベンゼン,
1,1−ビス（第三ブチルパーオキシ）−3,3,5−トリメチ
ルシクロヘキサン等が挙げられる。As the peroxide, dicumyl peroxide, 1,3-bis (tertiary butyl peroxy isopropyl) benzene,
1,1-bis (tertiary butylperoxy) -3,3,5-trimethylcyclohexane and the like can be mentioned.
［実施例］ 以下、本発明の実施例を説明する。[Examples] Examples of the present invention will be described below.
第１表の実施例１〜５および比較例１〜４の各欄に示
すような配合に従って各種成分を12インチロールを用い
混練し、これらを、その後40m/m押出機（L/D＝22）を用
いて、芯線外径1.8φの導体上に厚さ20μｍ紙セパレー
タを縦て添えしながら1.1mm厚さで押出被覆した。その
後、これを15kg/cm2の水蒸気で３分間処理を行って架橋
し、ケーブルを作製した。Various components were kneaded using a 12-inch roll according to the formulations as shown in the columns of Examples 1 to 5 and Comparative Examples 1 to 4 in Table 1, and these were then kneaded with a 40 m / m extruder (L / D = 22. ) Was used to extrude a 1.1 mm-thick conductor while vertically attaching a 20 μm-thick paper separator on a conductor having a core wire outer diameter of 1.8φ. Then, this was treated with steam of 15 kg / cm 2 for 3 minutes to crosslink it to prepare a cable.
このように作成したケーブル（試料）の評価を引張特
性及び垂直燃焼試験について行い、その結果を第１表の
下欄に示す。各評価方法は次の通りである。The cable (sample) thus prepared was evaluated for tensile properties and vertical combustion test, and the results are shown in the lower column of Table 1. Each evaluation method is as follows.
引張力特性： 芯線およびセパレータを除いた試料をJI
SC3005に準拠し、引張速度500mm/minで測定した。Tensile strength characteristics: JI is used for the sample excluding core wire and separator.
In accordance with SC3005, the tensile speed was measured at 500 mm / min.
垂直燃焼試験： UL44に準拠し行い、燃焼時間が60秒以
内のものを合格、60秒を越えるものを不合格と判定し
た。Vertical combustion test: Conducted in accordance with UL44, it was judged that the one with a burning time of 60 seconds or less was passed, and the one with a burning time of more than 60 seconds was failed.
第１表に示される結果から、本発明の難燃性電気絶縁
組成物を用いた実施例１〜５の試料は、いずれも引張特
性に優れ、その難燃性は垂直燃焼試験に合格するレベル
である。これに対して、金属水酸化物の配合量が限定値
未満の比較例１、鉛丹が添加されていない比較例２及び
エチレン酢酸ビニルコポリマがブレンドされていない比
較例３の試料は、いずれも垂直燃焼試験で不合格とな
る。また、金属水酸化物の配合量が限定値を越えている
比較例４の試料は、伸びが著しく低下する。 From the results shown in Table 1, the samples of Examples 1 to 5 using the flame-retardant electrical insulating composition of the present invention are all excellent in tensile properties, and their flame retardance is at a level that passes the vertical combustion test. Is. On the other hand, the samples of Comparative Example 1 in which the compounding amount of the metal hydroxide is less than the limit value, Comparative Example 2 in which lead oxide is not added, and Comparative Example 3 in which the ethylene vinyl acetate copolymer is not blended are all Fail the vertical burning test. Further, the sample of Comparative Example 4 in which the compounding amount of the metal hydroxide exceeds the limited value, the elongation is remarkably reduced.
したがって、エチレン酢酸ビニルコポリマまたはエチ
レン酢酸ビニルコポリマとポリオレフィンとのブレンド
ポリマに、限定量の金属水酸化物と鉛丹を配合すること
により、引張特性に優れ、垂直燃焼試験に強姦する高度
の難燃性を付与する難燃性電気絶縁組成物を得られるこ
とになる。Therefore, by blending ethylene vinyl acetate copolymer or a blend polymer of ethylene vinyl acetate copolymer and polyolefin with a limited amount of metal hydroxide and red lead, it has excellent tensile properties and high flame retardance that rapes in vertical combustion tests. It is possible to obtain a flame-retardant electrical insulating composition that imparts properties.
次に、第２表及び第３表の実施例６〜13および比較例
５〜14の各欄に示すような配合に従って各種成分を12イ
ンチロールを用い混練し、これを、その後40m/m押出機
（L/D＝22）を用いて、芯線外径1.8φの導体上に厚さ20
μｍ紙セパレータを縦て添えしながら1.1mm厚さで押出
被覆した。その後、これを15kg/cm2の水蒸気で３分間熱
処理を行って架橋し、ケーブルを作製した。Next, various components were kneaded using a 12-inch roll according to the formulations shown in the columns of Examples 6 to 13 and Comparative Examples 5 to 14 in Tables 2 and 3, and then extruded at 40 m / m. Machine (L / D = 22), thickness 20 on the conductor of core wire outer diameter 1.8φ
It was extrusion-coated with a thickness of 1.1 mm while vertically attaching a μm paper separator. Then, this was heat-treated with 15 kg / cm 2 of steam for 3 minutes to be crosslinked to prepare a cable.
このように作製したケーブル（試料）の評価を引張特
性，耐熱老化性及び垂直燃焼試験について行い、その結
果を第２表及び第３票の下欄に示す。なお、第２表のフ
ェノール樹脂処理の鉛丹は、鉛丹700gを水100cc中に入
れ超音波洗浄機で懸濁させながら、フェノール21g,ホル
マリン38gを添加し、80℃で攪拌した後、リン酸12gを加
え80℃で,1時間攪拌して行った。その後120℃で24時間
乾燥後粉砕したものを用いた。各評価方法は次の通りで
ある。The cable (sample) thus produced was evaluated for tensile properties, heat aging resistance and vertical burning test, and the results are shown in Table 2 and the lower column of the third vote. In addition, Phenol resin-treated lead tin in Table 2 was prepared by adding 700 g of lead tin in 100 cc of water and suspending it with an ultrasonic cleaner, adding 21 g of phenol and 38 g of formalin and stirring at 80 ° C. The acid 12g was added and it stirred at 80 degreeC for 1 hour. Then, it was dried at 120 ° C. for 24 hours and then pulverized. Each evaluation method is as follows.
引張特性： 芯線およびセパレータを除いた試料をJISC
3005に準拠し、引張速度500mm/minで測定した。Tensile properties: JISC for samples excluding core wire and separator
According to 3005, the tensile speed was measured at 500 mm / min.
耐熱老化性： 芯線およびセパレータを除いた試料を15
0℃に保持したJIS型老化試験機中に98時間置いた後、22
℃に１日放置した。その後上述と同様の方法で引張特性
を評価した。Heat aging resistance: 15 samples excluding core wire and separator
After placing in a JIS type aging tester kept at 0 ° C for 98 hours,
It was left for 1 day at ℃. Then, the tensile properties were evaluated by the same method as described above.
垂直燃焼試験： UL44に準拠し行い、燃焼時間が60秒以
内のものを合格、60秒を越えるものを不合格と判定し
た。Vertical combustion test: Conducted in accordance with UL44, it was judged that the one with a burning time of 60 seconds or less was passed, and the one with a burning time of more than 60 seconds was failed.
第２表及び第３表に示される結果から、本発明の難燃
性電気絶縁組成物を用いた実施例６〜13の試料は、いず
れも引張特性，耐熱老化性に優れ、その難燃性は垂直燃
焼試験に合格するレベルである。これに対して、金属水
酸化物の配合量が限定値未満の比較例５及び10、鉛丹が
添加されていない比較例６及び11、エチレン酢酸ビニル
コポリマがブレンドされていない比較例７及び12の試料
は、いずれも垂直燃焼試験で不合格となる。また、表面
処理されていない鉛丹を使用している比較例18及び13、
鉛丹の配合量が限定値を越えている比較例９及び14の試
料は、耐熱老化性が著しく低下する。 From the results shown in Tables 2 and 3, the samples of Examples 6 to 13 using the flame-retardant electrical insulating composition of the present invention are all excellent in tensile properties and heat aging resistance Is a level that passes the vertical combustion test. On the other hand, Comparative Examples 5 and 10 in which the amount of the metal hydroxide compounded is less than the limit value, Comparative Examples 6 and 11 in which lead oxide is not added, and Comparative Examples 7 and 12 in which ethylene vinyl acetate copolymer is not blended. All of the samples of No. 1 fail the vertical burning test. In addition, Comparative Examples 18 and 13, which uses the red lead is not surface-treated,
The samples of Comparative Examples 9 and 14 in which the amount of lead-tan compounded exceeds the limited value, the heat aging resistance is significantly reduced.
したがって、エチレン酢酸ビニルコポリマまたはエチ
レン酢酸ビニルコポリマとポリオレフィンとのブレンド
ポリマに、規定量の金属水酸化物と共に表面処理した鉛
丹を配合することにより、引張性に優れ、垂直燃焼試験
に合格する高度の難燃性を付与すると共に、耐熱老化性
にも優れている難燃性電気絶縁組成物を得られることに
なる。Therefore, by blending ethylene vinyl acetate copolymer or a blend polymer of ethylene vinyl acetate copolymer and polyolefin with lead tin treated with a specified amount of metal hydroxide, it has excellent tensile properties and can pass the vertical combustion test. It is possible to obtain a flame-retardant electric insulating composition which is excellent in heat aging resistance as well as imparting flame retardancy.
［発明の効果］ 以上の通り本発明によれば、難燃性に優れ、しかも燃
焼時にハロゲンガスを発生せず、火災時の安全性を向上
できると共に、機械的特性にも優れ、工業的価値が高い
難燃性電気絶縁組成物及びさらに耐熱老化性にも優れた
難燃性電気絶縁組成物を得られるという優れた効果を発
揮する。[Advantages of the Invention] As described above, according to the present invention, the flame retardancy is excellent, the halogen gas is not generated at the time of combustion, the safety at the time of a fire can be improved, and the mechanical properties are excellent. The flame-retardant electrical insulating composition having a high flame retardancy and the flame-retardant electrical insulating composition having excellent heat aging resistance can be obtained.
フロントページの続き (56)参考文献 特開 平４−76032（ＪＰ，Ａ) 特開 昭57−107503（ＪＰ，Ａ) 特開 平２−274742（ＪＰ，Ａ)Continuation of front page (56) Reference JP-A-4-76032 (JP, A) JP-A-57-107503 (JP, A) JP-A-2-274742 (JP, A)
Claims (4)
ン酢酸ビニルコポリマとポリオレフィンとのブレンドポ
リマ100重量部に対して、金属水酸化物を50〜300重量部
及び鉛丹を１〜50重量部配合したことを特徴とする難燃
性電気絶縁組成物。Claims: 1. To 100 parts by weight of ethylene vinyl acetate copolymer or a blend polymer of ethylene vinyl acetate copolymer and polyolefin, 50 to 300 parts by weight of metal hydroxide and 1 to 50 parts by weight of lead tin are blended. A flame-retardant electrical insulation composition characterized.
ン酢酸ビニルコポリマとポリオレフィンとのブレンドポ
リマ100重量部に対して、金属水酸化物を50〜300重量部
及び表面処理した鉛丹を１〜50重量部配合したことを特
徴とする難燃性電気絶縁組成物。2. 100 to 50 parts by weight of ethylene vinyl acetate copolymer or a blended polymer of ethylene vinyl acetate copolymer and polyolefin, and 50 to 300 parts by weight of metal hydroxide and 1 to 50 parts by weight of surface-treated lead tin. A flame-retardant electrical insulating composition characterized by being obtained.
フェノール樹脂で表面処理した鉛丹を用いた請求項２記
載の難燃性電気絶縁組成物。3. The surface-treated lead tin oxide according to claim 2,
The flame-retardant electrical insulating composition according to claim 2, which uses lead tin oxide surface-treated with a phenol resin.
モース硬度３以下の白色充填剤で表面処理した鉛丹を用
いた請求項２記載の難燃性電気絶縁組成物。4. The surface-treated lead tin oxide according to claim 2,
The flame-retardant electrical insulating composition according to claim 2, wherein lead oxide which is surface-treated with a white filler having a Mohs hardness of 3 or less is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325677A JP2527103B2 (en) | 1990-11-29 | 1990-11-29 | Flame retardant electrical insulation composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325677A JP2527103B2 (en) | 1990-11-29 | 1990-11-29 | Flame retardant electrical insulation composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04206110A JPH04206110A (en) | 1992-07-28 |
| JP2527103B2 true JP2527103B2 (en) | 1996-08-21 |
Family
ID=18179485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2325677A Expired - Lifetime JP2527103B2 (en) | 1990-11-29 | 1990-11-29 | Flame retardant electrical insulation composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527103B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4749524B2 (en) * | 1999-10-15 | 2011-08-17 | 三井・デュポンポリケミカル株式会社 | Flame retardant resin composition |
| CN1322048C (en) * | 1999-05-17 | 2007-06-20 | 杜邦-三井聚合化学品株式会社 | Flame retardant resin composition |
-
1990
- 1990-11-29 JP JP2325677A patent/JP2527103B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04206110A (en) | 1992-07-28 |
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