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JP3723025B2 - Non-halogen flame retardant resin composition - Google Patents

Non-halogen flame retardant resin composition
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JP3723025B2
JP3723025B2JP33502999AJP33502999AJP3723025B2JP 3723025 B2JP3723025 B2JP 3723025B2JP 33502999 AJP33502999 AJP 33502999AJP 33502999 AJP33502999 AJP 33502999AJP 3723025 B2JP3723025 B2JP 3723025B2
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weight
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resin composition
flame retardant
retardant resin
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JP2001151952A (en
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浩志 松井
浩一 飯沼
広隆 沢田
淳 鈴木
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Fujikura Ltd
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Fujikura Ltd
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Translated fromJapanese

【0001】
【発明の属する技術分野】
本発明は、ポリ塩化ビニル(PVC)組成物と同等の難燃性を有し、ハロゲンを含まないので焼却処分が可能な難燃性樹脂組成物に関する。
【0002】
【従来の技術】
PVC組成物は電気絶縁性が良く、自消性の難燃性を有していることから、電線被覆、チューブ、テープ、包装材、建材等に広く使用されている。
ところがPVC組成物はハロゲンである塩素(Cl)を含んでいるため、燃焼時にHCl等の腐食性ガスやダイオキシン等の有毒ガスを発生する。このため各種のPVC製品が廃棄物となった場合に、これらの焼却処分が難しい。そこで現状では埋立処分がなされているが、PVC組成物には添加剤としてPb系の安定剤が用いられていることが多いので、これが土壌等に溶出する問題もあり、産業廃棄物として処理が困難になってきている。
【0003】
【発明が解決しようとする課題】
これに対して、PVCに代わる樹脂組成物として、ハロゲンを含まないポリエチレン(PE)やポリプロピレン(PP)を用いれば、燃焼時に有害ガスが発生しないので焼却処分が可能であるが、これらのハロゲンを含まない樹脂組成物はPVCに比べて難燃性が劣る欠点があった。例えば、樹脂組成物の難燃性の評価尺度の1つである酸素指数(OI)を比較すると、PVCのOIが23〜40であるのに対して、PEおよびPPのOIは17〜19程度と劣っていることがわかる。
そこで、PEやPPといったハロゲンを含まない樹脂組成物に難燃性を付与するために、通常、これらにMg(OH)2、Al(OH)3などの金属水和物を添加することが行われている。しかしながら、金属水和物だけでは所望の高難燃性が得られなかったり、所望の高難燃性を得るために多量の金属水和物を添加すると機械特性等の特性が著しく劣化する場合がある。
【0004】
本発明は前記事情に鑑みてなされたもので、PVCと同程度の高難燃性を有するとともに機械特性も良好であり、焼却処理時に有害なガスを発生せず、環境的にも好ましい樹脂組成物を提供することを目的とする。
【0005】
【課題を解決するための手段】
前記課題を解決するために本発明のノンハロゲン難燃性樹脂組成物は、ポリオレフィン系樹脂100重量部に対して、水酸化マグネシウム35重量部以上250重量部以下、シリコーン系化合物5重量部以上50重量部以下、およびスズ酸亜鉛5重量部以上120重量部以下を添加してなることを特徴とする。本発明のノンハロゲン難燃性樹脂組成物は、電線、ケーブルまたはその類似品の被覆材料として用いたときに、電気用品取締法、UL規格、IEEE規格383、およびIEC規格332−1にそれぞれ制定されている燃焼試験のうちの少なくとも1つの試験に合格できるものである。
【0006】
【発明の実施の形態】
以下、本発明を詳しく説明する。
本発明におけるポリオレフィン系樹脂としては各種のものが使用可能であるが、特に、直鎖状低密度ポリエチレン(LLDPE)や超低密度ポリエチレン(VLDPE)などのポリエチレン(PE)、ポリプロピレン(PP)、エチレン−酢酸ビニル共重合体(EVA)、エチレン−エチルアクリレート共重合体(EEA)、およびエチレン−プロピレンゴム(EPR)等を好ましく用いることができる。 また、これらのポリオレフィン系樹脂の重合時または重合後に、無水マレイン酸、アクリル酸、フマル酸等の不飽和カルボン酸、あるいはこれらの誘導体を反応させて、変性させた酸変性ポリオレフィンも使用可能である。
ポリオレフィン系樹脂は1種でもよく、2種以上をブレンドしてもよい。
【0007】
上記ポリオレフィン系樹脂には、必須の成分として水酸化マグネシウムとシリコーン系化合物が添加されるほか、炭酸マグネシウム、二酸化珪素、およびスズ酸亜鉛のいずれかが添加される。
水酸化マグネシウムは、樹脂との親和性や樹脂組成物の機械特性改善など、必要に応じてステアリン酸等の高級飽和脂肪酸やシランカップリング剤などによって表面処理されたものでもよい。
水酸化マグネシウムの添加量は、多いほど樹脂の難燃性は高くなるが、多すぎると機械特性の低下が著しくなるので、ポリオレフィン系樹脂100重量部に対して、35重量部以上250重量部以下とするのが好ましく、特に好ましい範囲は40重量部以上180重量部以下である。
【0008】
シリコーン系化合物としては、シリコーンパウダー、シリコーンガム、およびシリコーンオイルなどを好ましく用いることができ、エポキシ基、メタクリル基、ビニル基、フェニル基などの官能基が導入されたものでもよい。シリコーンガムとは、シリコーンオイルのなかでも特に分子量が30万〜100万程度の高粘度のものをいう。これらは1種単独で用いてもよく、2種以上を混合して用いてもよい。
シリコーン系化合物の添加量は、ポリオレフィン系樹脂100重量部に対して、5重量部以上50重量部以下の範囲内が好ましく、特に好ましい範囲は5重量部以上40重量部以下である。シリコーン系化合物の添加量が少な過ぎると難燃性に対する添加効果が得られず、上記の範囲より多くても原料費が増大するだけで難燃性の向上はあまり望めない。
【0009】
炭酸マグネシウムに関しては、重炭酸マグネシウム(炭酸水素マグネシウム)も本発明における炭酸マグネシウムの範疇に含む。
炭酸マグネシウムの添加量は、ポリオレフィン系樹脂100重量部に対して、10重量部以上120重量部以下が好ましく、特に好ましくは20重量部以上50重量部以下である。炭酸マグネシウムの添加量が少な過ぎると好ましい高難燃性が得られず、多すぎると械特性の低下が著しくなる。
【0010】
二酸化珪素は微粉末状のものが好ましく、また、特にシラン処理されたものが好ましい。二酸化珪素の添加量は、ポリオレフィン系樹脂100重量部に対して、5重量部以上120重量部以下が好ましく、特に好ましくは10重量部以上40重量部以下である。二酸化珪素の添加量が少な過ぎると好ましい高難燃性が得られず、多すぎると械特性の低下が著しくなる。
【0011】
スズ酸亜鉛は、例えば水酸化マグネシウムなどと複合化されたものでもよい。また、水酸基を有するヒドロキシスズ酸亜鉛も本発明におけるスズ酸亜鉛の範疇に含まれる。
スズ酸亜鉛の添加量は、ポリオレフィン系樹脂100重量部に対して、5重量部以上120重量部以下が好ましく、特に好ましくは10重量部以上40重量部以下である。スズ酸亜鉛の添加量が少な過ぎると好ましい高難燃性が得られず、多すぎると械特性の低下が著しくなる。
【0012】
また、上記の配合剤の他に老化防止剤を添加することが好ましく、これにより熱劣化が抑えられる。老化防止剤としては特に限定されないが、例えばフェノール系やアミン系のもの等を好ましく用いることができる。老化防止剤の添加量は少なすぎると添加効果が得られず、多すぎるとブルーミングやブリード・アウトが生じることがあるので、ポリオレフィン系樹脂100重量部に対して0.1重量部以上3重量部以下が好ましい。
さらに、紫外線吸収剤、銅害防止剤、着色顔料、染料その他の着色剤、少量のタルクなどの無機物微粉末など、用途に応じて適宜の添加剤を配合することができる。添加剤はハロゲンおよび、特に鉛(Pb)を含まないものが好ましい。
また本発明のノンハロゲン難燃性樹脂は、架橋されたものであってもよく、非架橋のものでもよい。架橋により樹脂の耐熱温度が向上するので、樹脂の用途等、必要に応じて架橋させればよい。架橋方法は架橋剤、電子線照射、シラン架橋など周知の手法により行うことができる。架橋させる場合には、各架橋方法において慣用されている架橋剤、架橋助剤、架橋促進剤等を必要に応じて添加する。
【0013】
本発明のノンハロゲン難燃性樹脂組成物は、上記のポリオレフィン系樹脂100重量部に対して、水酸化マグネシウム35重量部以上250重量部以下およびシリコーン系化合物5重量部以上50重量部以下を添加したほか、炭酸マグネシウム10重量部以上120重量部以下、二酸化珪素5重量部以上120重量部以下、またはスズ酸亜鉛5重量部以上120重量部以下のいずれかを添加することにより、好ましい高難燃性が達成され、電線、ケーブルまたはその類似品の被覆材料として用いたときに、電気用品取締法、UL規格、IEEE規格383、およびIEC規格332−1にそれぞれ制定されている燃焼試験のうちの少なくとも1つの試験に合格することができる。また配合によっては、電気用品取締法およびUL規格の両方の試験に合格する程度の高難燃性を達成することができ、さらに好ましくは全部の燃焼試験に合格する高難燃性のノンハロゲン難燃性樹脂組成物を得ることも可能である。
【0014】
本発明によれば、酸素指数(OI)が24以上でPVCと同等の自消性の難燃性を実現することができ、火災時に燃え難く、発煙量も少ない難燃性樹脂組成物が得られる。またハロゲンを含んでおらず、燃焼時にハロゲンガス等の有毒ガスを発生しないので、焼却処分することができ、火災時にも有毒ガスを発生しない。また鉛の溶出がないので埋立処分も可能である。
また、数種の難燃剤を好適に組み合わせて使用することにより、水酸化マグネシウムの添加量を低減させて機械特性の劣化を抑えることができる。したがって、高難燃性と良好な機械特性を同時に達成することができる。
さらに、シリコーン系化合物を添加することにより、樹脂の耐候性を向上させることができる。従来より樹脂の耐候性を向上させるためにカーボンブラックを添加することが広く知られているが、カーボンブラックを添加すると樹脂組成物が黒く着色されてしまうので、他の色調に着色することが難しくなる。これに対してシリコーン化合物を添加すれば、耐候性を向上できるとともに、樹脂が濃色になることがないので着色性が良好な樹脂組成物を得ることが可能である。
また、特に炭酸マグネシウム、二酸化珪素、またはスズ酸亜鉛を使用すると、難燃性が効果的に向上する。これは燃焼時におけるチャー形成が効果的に促進され、新たな燃焼面の露出を阻止することにより難燃特性が改善されると考えられる。
【0015】
本発明のノンハロゲン難燃性樹脂組成物は、例えば絶縁電線、電子機器配線用電線、自動車用電線、機器用電線、電源コード、屋外配電用絶縁電線、電力用ケーブル、制御用ケーブル、通信用ケーブル、計装用ケーブル、信号用ケーブル、移動用ケーブル、および船用ケーブルなどの各種電線・ケーブルの絶縁材、シース材、テープ類、および介在物、ならびにケース、プラグ、およびテープなどの電線・ケーブル用付属部品(具体的には収縮チューブ、ゴムストレスリリーフコーン等)、電線管、配線ダクト、およびバスダクトなどの電材製品などの他、農業用シート、水道用ホース、ガス管被覆材、建築内装材、およびフロア材などに好適である。
特に、ポリオレフィン系樹脂としてEVAまたはEPRを用いてなるノンハロゲン難燃性樹脂組成物は電線や電源コードに好適であり、可撓性に優れるとともに、プラグ屈曲特性が良好で、プラグ部の耐トラッキング特性が優れた製品が得られる。
【0016】
【実施例】
以下、具体的な実施例を示して本発明の効果を明らかにする。
下記表1,2に示す配合割合(単位:重量部)で各種成分を配合し、混練機で混練して樹脂組成物を得た。
燃焼試験を行うために、2mm2の導体上に混練後の樹脂組成物を押出機にて 0.8mmの厚さで被覆して電線を製造した。燃焼試験はこの電線を用いて、電気取締法燃焼試験に制定される60゜傾斜燃焼試験、UL規格VW−1に制定される垂直燃焼試験、IEC規格332−1およびIEEE規格383に制定される垂直トレイ燃焼試験にそれぞれ準じて行った。
またJIS K7201記載されている方法に準処して酸素指数(OI)を測定し、さらにJIS K6760に記載されている方法に準処する引張強度および伸びを測定した。その結果を表に示す。引張強度の評価は1.05kgf/mm2以上を○、1.05kgf/mm2未満を×として示した。伸びについては250%以上を○、200〜250%を△、200%未満を×として示した。なお、上記4つの燃焼試験が全て不合格であったものについては、引張強度および伸びの測定は行わなかった。
【0017】
【表1】

Figure 0003723025
【0018】
【表2】
Figure 0003723025
【0019】
表1,2において、*1〜9はそれぞれ次の通りである。
*1:エチレン−酢酸ビニル共重合体、メルトフローレート(以下、MFRと記す)=2.5、VA含有量=19重量%
*2:エチレン−プロピレンゴム、ムーニー粘度ML1+4(100℃)=40、エチレン含有量=70mol%、プロピレン含有量30mol%
*3:ポリプロピレン、MFR=4、密度=0.91g/cm3
*4:ステアリン酸で表面処理した水酸化マグネシウム
*5:メチルビニルシリコーン(東レ社製)
*6:塩基性炭酸マグネシウム(協和化学社製)
*7:超微粉含水ケイ酸(水澤化学工業社製)
*8:ヒドロキシスズ酸亜鉛(日本化学産業社製)
*9:フェノール系酸化劣化防止剤(商品名:irganox1010、日本チバガイギー社製)
【0020】
【発明の効果】
以上説明したように本発明によれば、PVCと同等の難燃性を有するとともに機械特性も良好であり、かつハロゲンを含まないので焼却処分が可能なノンハロゲン難燃性樹脂組成物が得られる。
本発明によれば、電線、ケーブルまたはその類似品の被覆材料として用いたときに、電気用品取締法、UL規格、IEEE規格383、およびIEC規格332−1にそれぞれ制定されている燃焼試験のうちの1以上の試験に合格することができ、したがって実用性が高いノンハロゲン難燃性樹脂組成物を得ることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flame retardant resin composition having flame retardancy equivalent to that of a polyvinyl chloride (PVC) composition and capable of being incinerated because it does not contain halogen.
[0002]
[Prior art]
PVC compositions are widely used in wire coatings, tubes, tapes, packaging materials, building materials and the like because of their good electrical insulation and self-extinguishing flame retardancy.
However, since the PVC composition contains chlorine (Cl), which is a halogen, a corrosive gas such as HCl and a toxic gas such as dioxin are generated during combustion. For this reason, when various PVC products become waste, these incineration disposal is difficult. Accordingly, although landfill disposal is currently under way, Pb-based stabilizers are often used as additives in PVC compositions, so there is also a problem that these are eluted into the soil and the like, and can be treated as industrial waste. It has become difficult.
[0003]
[Problems to be solved by the invention]
On the other hand, if polyethylene (PE) or polypropylene (PP) that does not contain halogen is used as a resin composition instead of PVC, no harmful gas is generated during combustion, and incineration is possible. The resin composition which does not contain has the fault that a flame retardance is inferior compared with PVC. For example, when comparing the oxygen index (OI), which is one of the flame retardant evaluation scales of resin compositions, the OI of PVC is 23 to 40, whereas the OI of PE and PP is about 17 to 19 It turns out that it is inferior.
Therefore, in order to impart flame retardancy to resin compositions containing no halogen such as PE and PP, it is usually performed to add metal hydrates such as Mg (OH)2 and Al (OH)3 to these. It has been broken. However, the desired high flame retardancy cannot be obtained with metal hydrate alone, or the addition of a large amount of metal hydrate in order to obtain the desired high flame retardancy may significantly deteriorate the properties such as mechanical properties. is there.
[0004]
The present invention has been made in view of the above circumstances, has a high flame retardance comparable to PVC, has good mechanical properties, does not generate harmful gases during incineration, and is environmentally preferable. The purpose is to provide goods.
[0005]
[Means for Solving the Problems]
Non-halogen flame retardant resin composition of the present invention to solve the above problems, with respect to 100 parts by weight of the polyolefin-based resin, 250 parts by weight or less than 35 parts by weight of magnesiumhydroxide, shea recone compound 5 parts by weight or more 50 It is characterized by adding 5 parts by weight or less and 120 parts by weight or less of zinc stannate. The non-halogen flame retardant resin composition of the present invention is established in the Electrical Appliance and Material Control Law, UL Standard, IEEE Standard 383, and IEC Standard 332-1 when used as a coating material for electric wires, cables, or the like. That can pass at least one of the existing combustion tests.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
Various resins can be used as the polyolefin resin in the present invention, and in particular, polyethylene (PE) such as linear low density polyethylene (LLDPE) and very low density polyethylene (VLDPE), polypropylene (PP), and ethylene. -Vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-propylene rubber (EPR), etc. can be used preferably. Further, it is also possible to use acid-modified polyolefins modified by reacting unsaturated carboxylic acids such as maleic anhydride, acrylic acid, fumaric acid, or derivatives thereof during or after polymerization of these polyolefin-based resins. .
One type of polyolefin resin may be used, or two or more types may be blended.
[0007]
In addition to magnesium hydroxide and a silicone compound as essential components, any of magnesium carbonate, silicon dioxide, and zinc stannate is added to the polyolefin resin.
Magnesium hydroxide may be surface-treated with a higher saturated fatty acid such as stearic acid, a silane coupling agent, or the like as necessary, for example, to improve the affinity with the resin or to improve the mechanical properties of the resin composition.
As the amount of magnesium hydroxide added increases, the flame retardancy of the resin increases. However, if the amount of magnesium hydroxide is too large, the mechanical properties deteriorate significantly, so 35 parts by weight to 250 parts by weight with respect to 100 parts by weight of polyolefin resin The particularly preferred range is 40 parts by weight or more and 180 parts by weight or less.
[0008]
As the silicone compound, silicone powder, silicone gum, silicone oil, and the like can be preferably used, and those having a functional group such as an epoxy group, a methacryl group, a vinyl group, or a phenyl group may be used. Silicone gum refers to a silicone oil having a high viscosity with a molecular weight of about 300,000 to 1,000,000. These may be used alone or in combination of two or more.
The addition amount of the silicone compound is preferably in the range of 5 to 50 parts by weight, particularly preferably in the range of 5 to 40 parts by weight, based on 100 parts by weight of the polyolefin resin. If the amount of the silicone compound added is too small, the effect of adding to the flame retardancy cannot be obtained, and if it is more than the above range, the raw material cost increases, and the improvement of the flame retardancy cannot be expected.
[0009]
Regarding magnesium carbonate, magnesium bicarbonate (magnesium bicarbonate) is also included in the category of magnesium carbonate in the present invention.
The amount of magnesium carbonate added is preferably 10 to 120 parts by weight, particularly preferably 20 to 50 parts by weight, based on 100 parts by weight of the polyolefin resin. If the added amount of magnesium carbonate is too small, preferable high flame retardancy cannot be obtained, and if it is too much, the mechanical properties are remarkably deteriorated.
[0010]
Silicon dioxide is preferably in the form of fine powder, and in particular, silane-treated one. The amount of silicon dioxide added is preferably from 5 to 120 parts by weight, particularly preferably from 10 to 40 parts by weight, based on 100 parts by weight of the polyolefin resin. If the amount of silicon dioxide added is too small, preferable high flame retardancy cannot be obtained, and if it is too large, the mechanical properties are remarkably deteriorated.
[0011]
Zinc stannate may be combined with, for example, magnesium hydroxide. Moreover, the hydroxy hydroxy stannate which has a hydroxyl group is also contained in the category of the zinc stannate in this invention.
The amount of zinc stannate added is preferably 5 to 120 parts by weight, particularly preferably 10 to 40 parts by weight, based on 100 parts by weight of the polyolefin resin. If the amount of zinc stannate added is too small, preferable high flame retardancy cannot be obtained, and if it is too much, the mechanical properties are remarkably deteriorated.
[0012]
Moreover, it is preferable to add an anti-aging agent in addition to the above-mentioned compounding agent, thereby suppressing thermal degradation. Although it does not specifically limit as an anti-aging agent, For example, a phenol type, an amine type thing, etc. can be used preferably. If the addition amount of the anti-aging agent is too small, the effect of addition cannot be obtained, and if it is too much, blooming or bleeding out may occur. Therefore, 0.1 part by weight or more and 3 parts by weight with respect to 100 parts by weight of the polyolefin resin The following is preferred.
Furthermore, appropriate additives such as ultraviolet absorbers, copper damage inhibitors, color pigments, dyes and other colorants, and small amounts of inorganic fine powders such as talc can be blended depending on the application. The additive is preferably free of halogen and in particular lead (Pb).
The non-halogen flame retardant resin of the present invention may be crosslinked or non-crosslinked. Since the heat-resistant temperature of the resin is improved by crosslinking, the resin may be crosslinked as necessary, such as the use of the resin. The crosslinking method can be performed by a known method such as a crosslinking agent, electron beam irradiation, silane crosslinking. In the case of crosslinking, a crosslinking agent, a crosslinking assistant, a crosslinking accelerator and the like conventionally used in each crosslinking method are added as necessary.
[0013]
In the non-halogen flame retardant resin composition of the present invention, 35 parts by weight or more and 250 parts by weight or less of magnesium hydroxide and 5 parts by weight or more and 50 parts by weight or less of a silicone compound are added to 100 parts by weight of the polyolefin resin. In addition, preferable high flame retardancy is achieved by adding any of 10 parts by weight to 120 parts by weight of magnesium carbonate, 5 parts by weight to 120 parts by weight of silicon dioxide, or 5 parts by weight to 120 parts by weight of zinc stannate. At least of the combustion tests established in the Electrical Appliance and Material Control Law, the UL standard, the IEEE standard 383, and the IEC standard 332-1 when used as a coating material for electric wires, cables or the like. One test can be passed. In addition, depending on the formulation, it is possible to achieve a high flame resistance that passes both the Electrical Appliance and Material Control Law and UL standards, and more preferably a highly flame retardant non-halogen flame retardant that passes all combustion tests. It is also possible to obtain a functional resin composition.
[0014]
According to the present invention, a flame-retardant resin composition having an oxygen index (OI) of 24 or more and capable of realizing self-extinguishing flame retardancy equivalent to PVC, hardly burning in a fire, and having a low smoke generation amount is obtained. It is done. In addition, it does not contain halogens and does not generate toxic gases such as halogen gas during combustion. Therefore, it can be incinerated and does not generate toxic gases during a fire. Also, since there is no elution of lead, landfill disposal is possible.
Moreover, by using several flame retardants in a suitable combination, the amount of magnesium hydroxide added can be reduced and deterioration of mechanical properties can be suppressed. Therefore, high flame retardancy and good mechanical properties can be achieved at the same time.
Furthermore, the weather resistance of the resin can be improved by adding a silicone compound. It has been widely known that carbon black is added to improve the weather resistance of resins. However, adding carbon black makes the resin composition colored black, making it difficult to color in other colors. Become. On the other hand, when a silicone compound is added, the weather resistance can be improved and the resin does not become dark, so that it is possible to obtain a resin composition with good colorability.
In particular, when magnesium carbonate, silicon dioxide, or zinc stannate is used, flame retardancy is effectively improved. This is thought to be because char formation during combustion is effectively promoted and flame retardancy is improved by preventing exposure of a new combustion surface.
[0015]
The non-halogen flame retardant resin composition of the present invention includes, for example, insulated wires, electronic device wiring wires, automotive wires, device wires, power cords, outdoor distribution insulated wires, power cables, control cables, and communication cables. , Instrumentation cables, signal cables, moving cables, ship cables, and other wires / cable insulation, sheathing materials, tapes, and inclusions, as well as wires, cables such as cases, plugs, and tapes In addition to parts (specifically shrinkable tubes, rubber stress relief cones, etc.), electrical products such as electric conduits, wiring ducts, and bus ducts, agricultural sheets, water hoses, gas pipe coverings, building interior materials, and Suitable for flooring materials.
In particular, non-halogen flame retardant resin compositions using EVA or EPR as polyolefin resins are suitable for electric wires and power cords, have excellent flexibility, plug bending characteristics, and plug section tracking resistance characteristics. An excellent product can be obtained.
[0016]
【Example】
Hereinafter, specific examples will be shown to clarify the effects of the present invention.
Various components were blended in the blending ratios (unit: parts by weight) shown in Tables 1 and 2 below, and kneaded with a kneader to obtain a resin composition.
In order to perform a combustion test, a kneaded resin composition was coated on a 2 mm2 conductor with an extruder to a thickness of 0.8 mm to produce an electric wire. Using this wire, the combustion test is established in the 60 ° inclined combustion test established in the Electric Control Law combustion test, the vertical combustion test established in the UL standard VW-1, the IEC standard 332-1 and the IEEE standard 383. The vertical tray combustion test was performed in accordance with each.
Further, the oxygen index (OI) was measured according to the method described in JIS K7201, and the tensile strength and elongation subjected to the method described in JIS K6760 were further measured. The results are shown in the table. In the evaluation of the tensile strength, 1.05 kgf / mm2 or more was shown as ◯, and less than 1.05 kgf / mm2 was shown as x. With respect to the elongation, 250% or more was indicated as ◯, 200 to 250% as Δ, and less than 200% as ×. Note that the tensile strength and the elongation were not measured for those in which all of the above four combustion tests failed.
[0017]
[Table 1]
Figure 0003723025
[0018]
[Table 2]
Figure 0003723025
[0019]
In Tables 1 and 2, * 1 to 9 are as follows.
* 1: Ethylene-vinyl acetate copolymer, melt flow rate (hereinafter referred to as MFR) = 2.5, VA content = 19% by weight
* 2: Ethylene-propylene rubber, Mooney viscosity ML1 + 4 (100 ° C.) = 40, ethylene content = 70 mol%, propylene content 30 mol%
* 3: Polypropylene, MFR = 4, density = 0.91 g / cm3
* 4: Magnesium hydroxide surface-treated with stearic acid * 5: Methyl vinyl silicone (manufactured by Toray Industries, Inc.)
* 6: Basic magnesium carbonate (manufactured by Kyowa Chemical)
* 7: Ultrafine hydrous silicic acid (manufactured by Mizusawa Chemical Co., Ltd.)
* 8: Zinc hydroxystannate (manufactured by Nippon Chemical Industry Co., Ltd.)
* 9: Phenol-based oxidative degradation inhibitor (trade name: irganox1010, manufactured by Ciba Geigy Japan)
[0020]
【The invention's effect】
As described above, according to the present invention, a non-halogen flame retardant resin composition that has flame retardancy equivalent to PVC, has good mechanical properties, and does not contain halogen can be incinerated.
According to the present invention, when used as a coating material for electric wires, cables or similar products, among the combustion tests established in the Electrical Appliance and Material Control Law, UL Standard, IEEE Standard 383, and IEC Standard 332-1, respectively. Thus, a halogen-free flame retardant resin composition having high practicality can be obtained.

Claims (2)

Translated fromJapanese
ポリオレフィン系樹脂100重量部に対して、水酸化マグネシウム35重量部以上250重量部以下、シリコーン系化合物5重量部以上50重量部以下、およびスズ酸亜鉛5重量部以上120重量部以下を添加してなることを特徴とするノンハロゲン難燃性樹脂組成物。  To 100 parts by weight of polyolefin resin, 35 parts by weight to 250 parts by weight of magnesium hydroxide, 5 parts by weight to 50 parts by weight of silicone compound, and 5 parts by weight to 120 parts by weight of zinc stannate are added. A halogen-free flame retardant resin composition characterized by comprising: 電線、ケーブルまたはその類似品の被覆材料として用いたときに、電気用品取締法、UL規格、IEEE規格383、およびIEC規格332−1にそれぞれ制定されている燃焼試験のうちの少なくとも1つの試験に合格することを特徴とする請求項1に記載のノンハロゲン難燃性樹脂組成物。When used as a covering material for electric wires, cables or the like, at least one of the combustion tests established in the Electrical Appliance and Material Control Law, UL Standard, IEEE Standard 383, and IEC Standard 332-1 The non-halogen flame retardant resin composition according to claim1, which passes the test.
JP33502999A1999-11-251999-11-25 Non-halogen flame retardant resin compositionExpired - Fee RelatedJP3723025B2 (en)

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US20060128865A1 (en)*2003-01-212006-06-15Koji KodamaMagnesium hydroxide, magnesium hydroxide/silica composite particle, processes for producing these, method of surface treatment of these, and resin composition and electric wire containing pr produced with these
DE602005021482D1 (en)2004-04-202010-07-08Yazaki Corp FLAME RETARDANT
CN1969007B (en)*2004-06-152010-05-12Lg电线有限公司 Resin composition resistant to thermal deformation and cutting, and insulating material and cable using same
JP4879635B2 (en)*2006-04-142012-02-22信越化学工業株式会社 Non-halogen flame retardant resin composition for electron beam irradiation
US8269107B2 (en)*2010-05-282012-09-18General Cable Technologies CorporationHalogen-free flame retardant polyolefin
JP5533351B2 (en)*2010-06-302014-06-25株式会社オートネットワーク技術研究所 Insulated wire
JP6229942B2 (en)*2014-03-052017-11-15日立金属株式会社 Insulated wires for railway vehicles and cables for railway vehicles
WO2019186784A1 (en)*2018-03-282019-10-03住友電気工業株式会社Flame-retardant resin composition, flame-retardant heat shrink tube, and flame-retardant insulated electrical wire
CN115975311B (en)*2023-02-152023-10-03飞达科技有限公司High-flame-retardance cable material and preparation method thereof

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