JPH0873670A - Crosslinkable polyethylene composition and electric wire and cable - Google Patents
Crosslinkable polyethylene composition and electric wire and cableInfo
- Publication number
- JPH0873670A JPH0873670A JP6240552A JP24055294A JPH0873670A JP H0873670 A JPH0873670 A JP H0873670A JP 6240552 A JP6240552 A JP 6240552A JP 24055294 A JP24055294 A JP 24055294A JP H0873670 A JPH0873670 A JP H0873670A
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- JP
- Japan
- Prior art keywords
- density polyethylene
- cable
- linear low
- polyethylene
- melt index
- 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.)
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- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電線、ケーブルの絶縁
体やシース、あるいはパイプ等に適した直鎖状低密度ポ
リエチレンをベースポリマーとする架橋性ポリエチレン
組成物及び該組成物を用いた電線、ケーブルに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crosslinkable polyethylene composition containing a linear low-density polyethylene as a base polymer, which is suitable for electric wires, cable insulators and sheaths, pipes and the like, and electric wires using the composition. , About cables.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】低密度
ポリエチレンその他のポリエチレン樹脂を架橋し、その
機械的強度及び耐熱性を改良することは周知であり、各
種の架橋手段が知られている。従来架橋ポリエチレン電
力ケーブルは有機過酸化物を用いて加熱することによっ
て分子間架橋を生ぜしめる架橋方法が用いられてきた。
この有機過酸化物を用いた架橋方法は高圧法で製造され
た低密度ポリエチレンを架橋することはできるが、高圧
法で製造された低密度ポリエチレンより融点が高く、溶
融粘度の大きい直鎖状ポリエチレンでは成形時に押出機
内で発熱して早期架橋を生じ、成形できない。2. Description of the Related Art It is well known that low density polyethylene and other polyethylene resins are crosslinked to improve their mechanical strength and heat resistance, and various crosslinking means are known. Conventionally, a cross-linked polyethylene power cable has been used with a cross-linking method that causes inter-molecular cross-linking by heating with an organic peroxide.
Although the cross-linking method using this organic peroxide can cross-link low-density polyethylene produced by the high-pressure method, it is a linear polyethylene having a higher melting point and a higher melt viscosity than the low-density polyethylene produced by the high-pressure method. However, heat cannot be formed in the extruder due to heat generation in the extruder during molding and premature crosslinking occurs.
【０００３】一方、ポリエチレンをシランと有機過酸化
物の存在下で反応させることによって変性し、そのシラ
ン変性ポリエチレンをシラノール縮合触媒下で水分と接
触させて架橋ポリエチレンを製造する方法は既に知られ
ている（特公昭 48-1711号公報参照）。直鎖状低密度ポ
リエチレンは機械的強度及び耐熱性にすぐれているもの
の、上記シランを用いた架橋方法では、シランと反応さ
せると加工性を著しく悪化させ、押出機の負荷が異常に
高くなったり、押出成形物の表面が荒れてしまい、架橋
させても物性が向上するどころか、逆に機械的強度の低
下を招く。On the other hand, a method of producing crosslinked polyethylene by modifying polyethylene by reacting it with silane in the presence of an organic peroxide and contacting the silane-modified polyethylene with moisture under a silanol condensation catalyst is already known. (See Japanese Patent Publication No. 48-1711). Although the linear low-density polyethylene is excellent in mechanical strength and heat resistance, in the crosslinking method using the above-mentioned silane, when it is reacted with silane, the workability is significantly deteriorated and the load of the extruder becomes abnormally high. In addition, the surface of the extruded product becomes rough, and even if it is crosslinked, the physical properties of the extruded product are not improved, and conversely, the mechanical strength is decreased.
【０００４】直鎖状低密度ポリエチレンにシランを用い
て架橋する方法としては特公昭57-39647号公報に、又直
鎖状中密度ポリエチレンを架橋する方法としては特公平
4-71098号公報に開示されている。しかし、これらはい
ずれも高圧法で製造された低密度ポリエチレンを添加し
て直鎖状ポリエチレンの弱点である加工性を補ってい
る。A method for crosslinking linear low-density polyethylene with silane is disclosed in JP-B-57-39647, and a method for crosslinking linear medium-density polyethylene is disclosed in Japanese Patent Publication No.
It is disclosed in Japanese Patent Publication No. 4-71098. However, all of them supplement the processability, which is a weak point of linear polyethylene, by adding low density polyethylene produced by a high pressure method.
【０００５】[0005]
【課題を解決するための手段】本発明は、かかるシラン
を用いた直鎖状低密度ポリエチレンの架橋法の問題点を
改善すべく種々検討を重ねた結果、特定の直鎖状低密度
ポリエチレンをベースポリマーとして用いることによっ
て、加工性、機械的強度、耐熱性が改善されることを見
出したもので、その特徴は、エチレンとブテン−１の共
重合体であり、温度 190℃、荷重 21600ｇで測定したメ
ルトインデックスが45ｇ／10分以上、160ｇ／10分以下
である直鎖状低密度ポリエチレンと、シラン化合物、有
機過酸化物及びシラノール縮合触媒からなる架橋性ポリ
エチレン組成物及び該組成物の被覆層を具え、この被覆
層が架橋されている電線、ケーブルにある。As a result of various studies to improve the problems of the crosslinking method for linear low-density polyethylene using such silane, the present invention has revealed that a specific linear low-density polyethylene can be obtained. It was found that the use as a base polymer improves processability, mechanical strength, and heat resistance, and is characterized by being a copolymer of ethylene and butene-1, at a temperature of 190 ° C and a load of 21600 g. Crosslinkable polyethylene composition comprising linear low-density polyethylene having a measured melt index of 45 g / 10 min or more and 160 g / 10 min or less, a silane compound, an organic peroxide and a silanol condensation catalyst, and coating of the composition A wire or cable having a layer, the cover layer being cross-linked.
【０００６】本発明のベースポリマーとしての直鎖状低
密度ポリエチレンは、チグラー系触媒、クロム系触媒等
の各種の触媒を用い、中圧下又は低圧下において気相
法、液相法、懸濁重合法等の重合法もしくは高圧イオン
重合法によるエチレンとブテン−１の共重合体である。
共重合モノマーとしては一般にブテン−１以外に、ヘキ
セン−１，４−メチルペンテン−１、オクテン−１等が
用いられており、これらを共重合モノマーとして重合さ
せた直鎖状低密度ポリエチレンは、非架橋の樹脂として
は共重合モノマーとしてブテン−１を用いたものよりも
すぐれた物性を示すにもかかわらず、シランを用いて架
橋する場合には加工性が著しく悪化し、諸物性の低下を
ひきおこす。The linear low-density polyethylene as the base polymer of the present invention uses various catalysts such as Ziegler type catalysts and chromium type catalysts under a medium pressure or a low pressure, a gas phase method, a liquid phase method, a suspension weight method. It is a copolymer of ethylene and butene-1 by a polymerization method such as a legal method or a high-pressure ionic polymerization method.
As the copolymerization monomer, hexene-1,4-methylpentene-1, octene-1 and the like are generally used in addition to butene-1, and linear low-density polyethylene obtained by polymerizing these as the copolymerization monomer is As a non-crosslinked resin, even though it shows physical properties superior to those using butene-1 as a copolymerization monomer, when it is crosslinked with silane, the processability is remarkably deteriorated and the physical properties are deteriorated. Bring up.
【０００７】直鎖状低密度ポリエチレンの温度 190℃、
荷重 21600ｇで測定したメルトインデックスは45ｇ／10
分〜 160／10分であることが必要である。ポリエチレン
のメルトインデックスは通常、温度 190℃、荷重2160ｇ
で測定されるが、この条件では判定できず、荷重を 216
00ｇで測定しなければならない。これは樹脂をシランで
変性すると押出成形時の樹脂圧力が非変性樹脂の 1.5倍
から２倍以上に上がるため、高圧力時のメルトインデッ
クスで比較しなければならないからである。上記条件で
のメルトインデックスが45ｇ／10分未満では押出機内で
の発熱が大きくなり、部分的に早期架橋を生じたり、押
出成形物の表面状態が悪化し、機械的強度の低下をひき
おこす。又メルトインデックスが 160ｇ／10分を越える
と、ブテン−１を共重合モノマーとする直鎖状低密度ポ
リエチレンの機械的強度が弱いので、架橋しても強度不
足を補えない。Temperature of linear low density polyethylene 190 ° C.,
Melt index measured at a load of 21600g is 45g / 10
It should be between minutes and 160/10 minutes. The melt index of polyethylene is usually 190 ° C and load is 2160g.
However, it cannot be judged under this condition, and the load is 216
Must be measured at 00g. This is because when the resin is modified with silane, the resin pressure at the time of extrusion increases from 1.5 times to 2 times or more that of the unmodified resin, so it is necessary to compare by melt index at high pressure. If the melt index under the above conditions is less than 45 g / 10 min, the heat generated in the extruder will be large, premature crosslinking will occur partially, the surface condition of the extruded product will deteriorate, and the mechanical strength will decrease. On the other hand, if the melt index exceeds 160 g / 10 min, the linear low-density polyethylene having butene-1 as a comonomer has a low mechanical strength, and therefore the insufficient strength cannot be compensated for by crosslinking.
【０００８】本発明において直鎖状低密度ポリエチレン
と反応させるシラン化合物は、一般式RR'nSiYn-3で示さ
れる化合物である。ここでＲは例えばビニル基、アリル
基、ブテニル基、シクロヘキセニル基等の不飽和脂肪族
炭化水素または不飽和のハイドロカーボンオキシ基であ
り、末端にビニル基を持つものが望ましい。Ｙはメトキ
シ基、エトキシ基、プロポキシ基、メトキシエトキシ
基、アセトキシ基、アルキルアミノ基等任意の加水分解
し得る有機基である。R'は任意の有機基であり、Ｒまた
はＹと同一であってもかまわない。最も好ましいシラン
化合物はビニルトリメトキシシラン及びビニルトリエト
キシシランである。シラン化合物の添加量は 0.5〜５重
量％が望ましい。The silane compound to be reacted with the linear low-density polyethylene in the present invention is a compound represented by the general formula RR'nSiYn- 3 . Here, R is, for example, an unsaturated aliphatic hydrocarbon such as a vinyl group, an allyl group, a butenyl group, a cyclohexenyl group or an unsaturated hydrocarbonoxy group, and it is desirable that R has a vinyl group at the terminal. Y is an arbitrary hydrolyzable organic group such as a methoxy group, an ethoxy group, a propoxy group, a methoxyethoxy group, an acetoxy group, and an alkylamino group. R'is an arbitrary organic group and may be the same as R or Y. The most preferred silane compounds are vinyltrimethoxysilane and vinyltriethoxysilane. The amount of the silane compound added is preferably 0.5 to 5% by weight.
【０００９】有機過酸化物としては、例えばジクミルパ
ーオキサイド、ジーターシャリーブチルパーオキサイ
ド、２，５−ジメチル−２，５−ジー（ターシャリーブ
チルパーオキシ）ヘキシン−３、２，５−ジメチル−
２，５−ジー（ターシャリーブチルパーオキシ）ヘキサ
ン等のジアルキルパーオキサイド類、ベンゾイルパーオ
キサイド、ビス（２，４−ジクロロベンゾイル）パーオ
キサイド等のジアシルパーオキサイド類、ターシャリー
ブチルパーオキシアセテート、ターシャリーブチルパー
オキシベンゾエート等のアルキルパーエステル類、クメ
ンハイドロパーオキサイド、ターシャリーブチルパーオ
キサイド等のパーアシッド類のラジカルを発生させるこ
とのできる化合物であれば何でもよいが、強いて挙げれ
ばジクミルパーオキサイドが最も好ましい。有機過酸化
物はシラン化合物 100重量部に対して５〜15重量部使用
するのが好ましい。Examples of organic peroxides include dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di (tert-butyl peroxy) hexyne-3,2,5-dimethyl-
Dialkyl peroxides such as 2,5-di (tert-butylperoxy) hexane, benzoyl peroxide, diacyl peroxides such as bis (2,4-dichlorobenzoyl) peroxide, tertiary butyl peroxyacetate, and tersia Any compound that can generate radicals of alkyl peresters such as butyl peroxybenzoate, cumene hydroperoxide, and tertiary acid such as tertiary butyl peroxide may be used, but dicumyl peroxide is a strong example. Is most preferred. The organic peroxide is preferably used in an amount of 5 to 15 parts by weight based on 100 parts by weight of the silane compound.
【００１０】シラノール縮合触媒としては、ジブチル錫
ジラウレート、ジオクチル錫ジラウレート、酢酸第一
錫、ナフテン酸鉛、ステアリン酸、ステアリン酸亜鉛、
等触媒作用を示すものであれば、有機酸、有機酸金属
塩、アミン、アミド、金属錯体、有機金属化合物、酸、
塩基等何でもよいが、ジブチル錫ジラウレートがよく用
いられる。添加量は要求される架橋速度に応じて任意に
変えることができる。又以上の配合剤の他に、酸化防止
剤、安定剤、滑剤、加工助剤、充填剤、着色剤、難燃
剤、発泡剤、紫外線吸収剤等を必要により添加してもか
まわない。As the silanol condensation catalyst, dibutyltin dilaurate, dioctyltin dilaurate, stannous acetate, lead naphthenate, stearic acid, zinc stearate,
As long as it exhibits a catalytic action, an organic acid, an organic acid metal salt, an amine, an amide, a metal complex, an organic metal compound, an acid,
Dibutyltin dilaurate is often used although it may be a base or the like. The addition amount can be arbitrarily changed according to the required crosslinking rate. In addition to the above compounding agents, antioxidants, stabilizers, lubricants, processing aids, fillers, colorants, flame retardants, foaming agents, ultraviolet absorbers and the like may be added if necessary.
【００１１】直鎖状低密度ポリエチレンをシラン変性し
て架橋成形物を得る方法には、特公昭 48-1711号公報に
示されるような、直鎖状低密度ポリエチレンとシラン化
合物と有機過酸化物を単軸押出機、二軸押出機、バンバ
リーミキサー、ニーダー等任意の混合装置で混合してシ
ラン変性した直鎖状低密度ポリエチレンをつくり、成形
時にシラノール縮合触媒を添加し、水分と接触させて架
橋する方法であってもよく、又特開昭51-82361号公報に
示されるような、直鎖状低密度ポリエチレンとシラン化
合物と有機過酸化物とシラノール縮合触媒を成形用押出
機に一括または別々に供給し、成形品を成形した後、水
分と接触させて架橋する方法でもかまわない。A method for obtaining a crosslinked molded product by modifying a linear low-density polyethylene with silane is described in JP-B-48-1711, in which a linear low-density polyethylene, a silane compound and an organic peroxide are used. Is mixed with an arbitrary mixing device such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, or a kneader to prepare a silane-modified linear low-density polyethylene, and a silanol condensation catalyst is added at the time of molding to bring it into contact with water. It may be a method of crosslinking, or as shown in JP-A-51-82361, a linear low-density polyethylene, a silane compound, an organic peroxide, and a silanol condensation catalyst are collectively or in a molding extruder. A method of supplying separately and molding the molded product, and then contacting with water to crosslink may be used.
【００１２】[0012]
実施例１：ユニオンカーバイト社製直鎖状低密度ポリエ
チレンDFDA-7540 （ペレット）の 100重量部に対しトリ
メトキシビニルシラン 2.5重量部、ジクミルパーオキサ
イド 0.1重量部を添加し、30mmφ二軸押出機で押出温度
190℃で押出してペレットとし、シラン変性直鎖状低密
度ポリエチレンを得た。又別にDFDA-7540とジブチル錫
ジラウレートと酸化防止剤ペンタエリスリチルーテトラ
キス［３−（３，５−ジーターシャリーブチル−４−ヒ
ドロキシフェニル）］プロピオネート（日本チバガイギ
ー社製商品名イルガノックス1010）を 100：10：１の重
量比でオープンロールで混合し、ペレットにしたもの
を、シラン変性直鎖状低密度ポリエチレン 100重量部に
対し５重量部添加して、50mmφ押出機で押出温度190
℃、スクリュー回転数 20rpmで押出し、ケーブルを成形
した。次いで、成形したケーブルを80℃の温水中に24時
間浸漬することにより架橋処理を行った。Example 1: To 100 parts by weight of Union Carbide linear low-density polyethylene DFDA-7540 (pellets), 2.5 parts by weight of trimethoxyvinylsilane and 0.1 part by weight of dicumyl peroxide were added, and a 30 mmφ twin-screw extruder was used. At extrusion temperature
It was extruded at 190 ° C. into pellets to obtain silane-modified linear low-density polyethylene. Separately, 100% of DFDA-7540, dibutyltin dilaurate, and antioxidant pentaerythrityl-tetrakis [3- (3,5-ditertiarybutyl-4-hydroxyphenyl)] propionate (trade name Irganox 1010 manufactured by Ciba-Geigy Japan Ltd.) are used. Mixing with an open roll at a weight ratio of: 10: 1 and pelletized, add 5 parts by weight to 100 parts by weight of silane-modified linear low-density polyethylene, and extrude at a extrusion temperature of 190 with a 50 mmφ extruder.
The cable was molded by extruding at 20 ° C. and a screw rotation speed of 20 rpm. Then, the formed cable was immersed in warm water at 80 ° C. for 24 hours to carry out a crosslinking treatment.
【００１３】実施例２：住友化学製直鎖状低密度ポリエ
チレンスミカセンＬ GA-701（ペレット）の 100重量部
に対しトリメトキシビニルシラン 2.0重量部、ジクミル
パーオキサイド 0.1重量部、ジブチル錫ジラウレート0.
05重量部、酸化防止剤イルガノックス1010を 0.5重量部
を添加した。混合物を50mmφ押出機で押出温度 215℃、
スクリュー回転数 15rpmで押出し、ケーブルを成形し
た。成形したケーブルは80℃の温水中に24時間浸漬する
ことにより架橋処理を行った。Example 2: 100 parts by weight of linear low-density polyethylene Sumikasen L GA-701 (pellet) manufactured by Sumitomo Chemical Co., Ltd., 2.0 parts by weight of trimethoxyvinylsilane, 0.1 part by weight of dicumyl peroxide, 0 part of dibutyltin dilaurate. .
05 parts by weight and 0.5 parts by weight of the antioxidant Irganox 1010 were added. Extrude the mixture with a 50mmφ extruder at 215 ℃.
The screw was extruded at a rotation speed of 15 rpm to form a cable. The molded cable was subjected to crosslinking treatment by immersing it in warm water at 80 ° C for 24 hours.
【００１４】実施例３：直鎖状低密度ポリエチレンとし
て日本石油化学製ソニレックス BR-3410（ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。Example 3: A cable was prepared in the same manner as in Example 2 using Sonilex BR-3410 (Pellets) manufactured by Nippon Petrochemical Co., Ltd. as the linear low-density polyethylene and subjected to a crosslinking treatment.
【００１５】実施例４：直鎖状低密度ポリエチレンとし
てユニオンカーバイト製 DFDA-7540（ペレット）を用
い、実施例２と同様の方法でケーブルを作成し、架橋処
理を行った。Example 4 Using DFDA-7540 (pellet) manufactured by Union Carbide as the linear low-density polyethylene, a cable was prepared in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００１６】実施例５：グラニュー状直鎖状低密度ポリ
エチレンとして日本ユニカー製MG-913 （平均粒径 0.5m
m）を用い、実施例２と同様の方法でケーブルを作成
し、架橋処理を行った。Example 5: As a granulated linear low density polyethylene, MG-913 manufactured by Nippon Unicar (average particle size 0.5 m
Using m), a cable was prepared in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００１７】実施例６：直鎖状低密度ポリエチレンとし
て住友化学製スミカセンＬ FA-201-0 （ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。Example 6: Using Sumikasen LFA-201-0 (pellet) manufactured by Sumitomo Chemical as the linear low-density polyethylene, a cable was prepared in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００１８】実施例７：直鎖状低密度ポリエチレンとし
て日本石油化学製リニレックスAF-3310（ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。Example 7: As a linear low-density polyethylene, Linirex AF-3310 (pellet) manufactured by Nippon Petrochemical Co., Ltd. was used to prepare a cable in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００１９】比較例１：直鎖状低密度ポリエチレンとし
て日本石油化学製リニレックスAF-2380（ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。COMPARATIVE EXAMPLE 1 A linear low-density polyethylene, Linirex AF-2380 (pellet) manufactured by Nippon Petrochemical Co., Ltd., was used to prepare a cable in the same manner as in Example 2, and the cable was cross-linked.
【００２０】比較例２：直鎖状低密度ポリエチレンとし
て住友化学製スミカセンＬ FA-101-0 （ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。Comparative Example 2: Using Sumikasen LFA-101-0 (pellet) manufactured by Sumitomo Chemical as the linear low-density polyethylene, a cable was prepared in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００２１】比較例３：直鎖状低密度ポリエチレンとし
て住友化学製スミカセンＬ FS-150A（ペレット）を用
い、実施例２と同様の方法でケーブルを作成し、架橋処
理を行った。Comparative Example 3: Sumikato L FS-150A (pellet) manufactured by Sumitomo Chemical Co., Ltd. was used as the linear low-density polyethylene, and a cable was prepared in the same manner as in Example 2 and subjected to a crosslinking treatment.
【００２２】比較例４：直鎖状低密度ポリエチレンとし
て三井石油化学製ウルトゼックス2021L （ペレット）を
用い、実施例２と同様の方法でケーブルを作成し、架橋
処理を行った。Comparative Example 4 A cable was prepared in the same manner as in Example 2 using a Ultzex 2021L (pellet) manufactured by Mitsui Petrochemical Co., Ltd. as the linear low-density polyethylene and subjected to a crosslinking treatment.
【００２３】比較例５：直鎖状低密度ポリエチレンとし
て出光石油化学製モアテック0168N（ペレット）を用
い、実施例２と同様の方法でケーブルを作成し、架橋処
理を行った。Comparative Example 5 A cable was prepared by the same method as in Example 2 using Moirtec 0168N (pellet) manufactured by Idemitsu Petrochemical as the linear low-density polyethylene and subjected to a crosslinking treatment.
【００２４】比較例６：直鎖状低密度ポリエチレンとし
て出光石油化学製モアテック0238N（ペレット）を用
い、実施例２と同様の方法でケーブルを作成し、架橋処
理を行った。Comparative Example 6 A cable was prepared in the same manner as in Example 2 using Moirtech 0238N (pellet) manufactured by Idemitsu Petrochemical as the linear low-density polyethylene and subjected to a crosslinking treatment.
【００２５】上記により作成したケーブルの架橋成形体
の物性を JIS-C3605に準拠して評価を行った。結果を表
１に示す。表１からわかるように、荷重 21600ｇでのメ
ルトインデックスが大きい方が加工性が良くなる傾向に
あるが、必ずしもメルトインデックスだけに依存せず、
ベースポリマーのコモノマーの種類にも依存している。
コモノマーがブテン−１以外のものであれば加熱変形率
はすぐれているが、加工性を著しく害し、機械的強度も
低下させてしまう。The physical properties of the crosslinked molded article of the cable produced as described above were evaluated according to JIS-C3605. The results are shown in Table 1. As can be seen from Table 1, workability tends to improve as the melt index at a load of 21600 g increases, but it does not necessarily depend on the melt index alone.
It also depends on the type of comonomer of the base polymer.
If the comonomer is other than butene-1, the heat deformation rate is excellent, but the workability is significantly impaired and the mechanical strength is also reduced.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
特定の直鎖状低密度ポリエチレンをベースポリマーとし
て用いることによって、加工性を改善し、機械的物性、
耐熱性にすぐれた架橋成形体が得られ、電線、ケーブル
やパイプ等に用いるとき効果的である。As described above, according to the present invention,
By using a specific linear low-density polyethylene as a base polymer, processability is improved, mechanical properties,
A crosslinked molded article having excellent heat resistance can be obtained, which is effective when used for electric wires, cables, pipes and the like.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｂ 7/18 Ｚ 7/34 Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location H01B 7/18 Z 7/34 A
Claims (3)
り、温度 190℃、荷重21600ｇで測定したメルトインデ
ックスが45ｇ／10分以上、 160ｇ／10分以下である直鎖
状低密度ポリエチレンと、シラン化合物、有機過酸化物
及びシラノール縮合触媒からなることを特徴とする架橋
性ポリエチレン組成物。1. A linear low-density polyethylene, which is a copolymer of ethylene and butene-1, and has a melt index of 45 g / 10 min or more and 160 g / 10 min or less measured at a temperature of 190 ° C. and a load of 21600 g. A crosslinkable polyethylene composition comprising a silane compound, an organic peroxide and a silanol condensation catalyst.
状直鎖状ポリエチレンを用いたことを特徴とする請求項
１記載の架橋性ポリエチレン組成物。2. The crosslinkable polyethylene composition according to claim 1, wherein granulated linear polyethylene having an average particle diameter of 0.05 mm to 2.0 mm is used.
エチレン組成物の被覆層を具え、該被覆層が架橋されて
いることを特徴とする電線、ケーブル。3. An electric wire or cable comprising a coating layer of the crosslinkable polyethylene composition according to claim 1 or 2, wherein the coating layer is crosslinked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240552A JP3003837B2 (en) | 1994-09-07 | 1994-09-07 | Crosslinkable polyethylene composition and electric wires and cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6240552A JP3003837B2 (en) | 1994-09-07 | 1994-09-07 | Crosslinkable polyethylene composition and electric wires and cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0873670A true JPH0873670A (en) | 1996-03-19 |
| JP3003837B2 JP3003837B2 (en) | 2000-01-31 |
Family
ID=17061231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6240552A Ceased JP3003837B2 (en) | 1994-09-07 | 1994-09-07 | Crosslinkable polyethylene composition and electric wires and cables |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3003837B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000065609A1 (en) * | 1999-04-22 | 2000-11-02 | Mitsui Chemicals, Inc. | Electric wire and method for production thereof |
| WO2006001588A1 (en) | 2004-04-08 | 2006-01-05 | Lg Chem. Ltd. | Polyethylene pipe having better melt pro- cessibility and high resistance to stress and method of preparing the same using metallocene catalyst |
| JP2006182941A (en) * | 2004-12-28 | 2006-07-13 | Nippon Polyethylene Kk | Polyethylenic resin raw material for water crosslinking, polyethylenic resin composition for water crosslinking and water-crosslinked polyethylenic resin molded product using the same |
-
1994
- 1994-09-07 JP JP6240552A patent/JP3003837B2/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000065609A1 (en) * | 1999-04-22 | 2000-11-02 | Mitsui Chemicals, Inc. | Electric wire and method for production thereof |
| US6534119B1 (en) | 1999-04-22 | 2003-03-18 | Mitsui Chemicals, Inc. | Wire and a process for its production |
| WO2006001588A1 (en) | 2004-04-08 | 2006-01-05 | Lg Chem. Ltd. | Polyethylene pipe having better melt pro- cessibility and high resistance to stress and method of preparing the same using metallocene catalyst |
| US7304118B2 (en) | 2004-04-08 | 2007-12-04 | Lg Chem, Ltd. | Polyethylene pipe having better melt processibility and high resistance to stress and method of preparing the same using metallocene catalyst |
| JP2006182941A (en) * | 2004-12-28 | 2006-07-13 | Nippon Polyethylene Kk | Polyethylenic resin raw material for water crosslinking, polyethylenic resin composition for water crosslinking and water-crosslinked polyethylenic resin molded product using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3003837B2 (en) | 2000-01-31 |
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