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JPH10334740A - Non-crosslinked resin composition for cable - Google Patents

Non-crosslinked resin composition for cable

Info

Publication number
JPH10334740A
JPH10334740A JP15774297A JP15774297A JPH10334740A JP H10334740 A JPH10334740 A JP H10334740A JP 15774297 A JP15774297 A JP 15774297A JP 15774297 A JP15774297 A JP 15774297A JP H10334740 A JPH10334740 A JP H10334740A
Authority
JP
Japan
Prior art keywords
weight
organic peroxide
composition
polyolefin resin
parts
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
Application number
JP15774297A
Other languages
Japanese (ja)
Inventor
Masaki Kawahigashi
正記 川東
Takeshi Murakami
剛 村上
Hiroshi Kato
寛 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Cable Industries Ltd
Original Assignee
Mitsubishi Cable Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Cable Industries Ltd filed Critical Mitsubishi Cable Industries Ltd
Priority to JP15774297A priority Critical patent/JPH10334740A/en
Publication of JPH10334740A publication Critical patent/JPH10334740A/en
Pending legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the deterioration resisting characteristic by using a composition obtained by mixing specified quantities of a hindered phenol age resistor and an organic peroxide to a polyolefin resin followed by heating in a specified temperature range, and setting the gel percentage after heating to a specified % or less. SOLUTION: When a composition is obtained by mixing an age resistor and an organic peroxide to a polyolefin resin followed by heating, the age resistor is reacted with the organic peroxide and denatured, whereby the deterioration resisting characteristic of the composition can be improved. The mixing amount of the age resistor is set to 0.1-5.0 wt.% to 100 wt.% of the polyolefin resin, and the mixing amount of the organic peroxide is set to 0.1-1.0 wt.%. The gel percentage after heating is set to 25%, or less. Since the organic peroxide has the role of denaturing the age resistor by the reaction with the age resistor, the polyolefin resin is preferably not crosslinked.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、耐劣化特性に優れたケ
ーブル用の非架橋型樹脂組成物に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-crosslinked resin composition for cables having excellent deterioration resistance.

【0002】[0002]

【従来技術および発明が解決しようとする課題】現在、
ケーブルにおいて、導体を絶縁被覆してなる電気絶縁層
には電気特性に優れるポリオレフィン樹脂組成物が好適
に用いられている。該ポリオレフィン樹脂組成物は、ケ
ーブルの電気絶縁層として必要とされる様々な物性を満
足させるため、ポリオレフィン樹脂に様々な配合剤を配
合したものである。
2. Description of the Related Art
In a cable, a polyolefin resin composition having excellent electric characteristics is suitably used for an electric insulating layer formed by insulatingly covering a conductor. The polyolefin resin composition is obtained by blending various compounding agents with the polyolefin resin in order to satisfy various physical properties required for an electrical insulating layer of a cable.

【0003】上記ポリオレフィン樹脂組成物において、
ポリオレフィン樹脂に配合される配合剤の一つとして老
化防止剤がある。老化防止剤はポリオレフィン樹脂組成
物の耐劣化特性を向上させるために配合されているが、
その効果は十分とは言えなかった。ケーブルの長期にわ
たる安定性の向上のためには、ケーブルの電気絶縁層に
用いられる組成物において耐劣化特性のさらなる向上が
望まれている。
[0003] In the above polyolefin resin composition,
An antioxidant is one of the compounding agents to be added to the polyolefin resin. Anti-aging agent is blended to improve the deterioration resistance properties of the polyolefin resin composition,
The effect was not enough. In order to improve the long-term stability of the cable, it is desired that the composition used in the electrical insulating layer of the cable has further improved deterioration resistance.

【0004】本発明は、上記課題を解消するためになさ
れたものであり、耐劣化特性に優れたケーブル用の非架
橋型樹脂組成物を提供するものである。
The present invention has been made in order to solve the above-mentioned problems, and provides a non-crosslinked resin composition for cables having excellent deterioration resistance.

【0005】[0005]

【課題を解決するための手段】本発明は、ポリオレフィ
ン樹脂100重量部に対しヒンダードフェノール系老化
防止剤0.1〜5.0重量部と有機過酸化物0.1〜
1.0重量部とを配合してなり、140〜300℃で加
熱してなる組成物であって、加熱後のゲル分率が25%
以下であることを特徴とするケーブル用の非架橋型樹脂
組成物によって、上記課題を解決するものである。
According to the present invention, 0.1 to 5.0 parts by weight of a hindered phenolic antioxidant and 0.1 to 100 parts by weight of an organic peroxide are added to 100 parts by weight of a polyolefin resin.
1.0 part by weight, and heated at 140 to 300 ° C., wherein the gel fraction after heating is 25%
The above object is achieved by a non-crosslinked resin composition for cables characterized by the following.

【0006】即ち、ポリオレフィン樹脂に老化防止剤と
有機過酸化物とを配合し、加熱してなる組成物において
は、老化防止剤が有機過酸化物と反応して変性すること
によって、組成物の耐劣化特性が向上することを見出
し、本発明の完成に至った。
That is, in a composition prepared by mixing an antioxidant and an organic peroxide with a polyolefin resin and heating the composition, the antioxidant reacts with the organic peroxide to modify the composition. The inventors have found that the deterioration resistance is improved, and have completed the present invention.

【0007】[0007]

【発明の実施の形態】本発明に用いられるポリオレフィ
ン樹脂としては、通常ケーブルに用いられるものであれ
ば特に制限はなく、例えば、ポリエチレン、ポリプロピ
レン、エチレン−プロピレン共重合体、または、エチレ
ンとオクテンなどのα−オレフィンとの共重合体などが
挙げられ、耐劣化特性の点から特にポリプロピレンが好
適に用いられる。本発明においては、上記ポリオレフィ
ン樹脂のうち、加工性に点から特にメルトフローレイト
が0.3〜5.0g/10分のものが好ましく、更には
0.5〜2.0g/10分のものがより好ましい。な
お、メルトフローレイトはJIS K6760に準拠し
て190℃、荷重2.16kgで測定した値である。
DETAILED DESCRIPTION OF THE INVENTION The polyolefin resin used in the present invention is not particularly limited as long as it is generally used for cables. For example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene and octene, etc. Copolymers with α-olefins, and polypropylene is particularly preferably used from the viewpoint of deterioration resistance. In the present invention, among the above-mentioned polyolefin resins, those having a melt flow rate of preferably 0.3 to 5.0 g / 10 min, more preferably 0.5 to 2.0 g / 10 min, from the viewpoint of processability. Is more preferred. The melt flow rate is a value measured at 190 ° C. under a load of 2.16 kg according to JIS K6760.

【0008】また、本発明に用いられるヒンダードフェ
ーノール系老化防止剤としては、通常用いられるもので
あれば特に制限はなく、例えば、テトラキス[メチレン
−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェ
ノール)プロピオネート]、2,2−チオ[ジエチル−
ビス−3−(3,5−ジ−t−ブチル−4−ヒドロキシ
フェノール)プロピオネート]、4,4’−チオビス
(3−メチル−6−t−ブチルフェノール)、4,4’
−メチレンビス(3,5−ジ−t−ブチルフェノー
ル)、2,2’−メチレンビス(4−エチル−6−t−
ブチルフェノール)、2,2’−メチレンビス(4−メ
チル−6−t−ブチルフェノール)、4,4’−ブチリ
デンビス(3−メチル−6−t−ブチルフェノール)、
オクタデシル−3−(3,5−ジ−t−ブチル−4−ヒ
ドロキシフェニル)プロピオネート、ペンタエリスリチ
ル−テトラキス[3−(3,5−ジ−t−ブチル−4−
ヒドロキシフェニル)プロピオネート]、4,4’−チ
オビス[(3−メチル−6−t−ブチルフェニル)−2
−チオアルキルプロピオネート]などが挙げられる。
The hindered phenol-based anti-aging agent used in the present invention is not particularly limited as long as it is a commonly used one. For example, tetrakis [methylene-3- (3,5-di-t- Butyl-4-hydroxyphenol) propionate], 2,2-thio [diethyl-
Bis-3- (3,5-di-t-butyl-4-hydroxyphenol) propionate], 4,4′-thiobis (3-methyl-6-t-butylphenol), 4,4 ′
-Methylenebis (3,5-di-t-butylphenol), 2,2'-methylenebis (4-ethyl-6-t-
Butylphenol), 2,2′-methylenebis (4-methyl-6-t-butylphenol), 4,4′-butylidenebis (3-methyl-6-t-butylphenol),
Octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-)
Hydroxyphenyl) propionate], 4,4′-thiobis [(3-methyl-6-t-butylphenyl) -2
-Thioalkylpropionate].

【0009】本発明において、上記老化防止剤の配合量
はポリオレフィン樹脂100重量部に対して0.1〜
5.0重量部であり、耐劣化特性の点から特に0.1〜
1.0重量部が好ましい。老化防止剤の配合量が0.1
重量部未満では耐劣化特性に劣るため、また、5.0重
量部を超えるとさらなる効果が得られないため好ましく
ない。
In the present invention, the amount of the antioxidant is 0.1 to 100 parts by weight of the polyolefin resin.
5.0 parts by weight, and especially 0.1 to
1.0 parts by weight is preferred. When the compounding amount of the antioxidant is 0.1
If the amount is less than 5 parts by weight, the resistance to deterioration is poor.

【0010】また、本発明に用いられる有機過酸化物と
しては、通常用いられるものであれば特に制限はなく、
例えば、ジクミルパーオキサイド、1,3−ビス(t−
ブチルパーオキシイソプロピル)−ベンゼン、2,5−
ジメチル−2,5−ジ(ブチルパーオキシ)−ヘキシン
−3などが挙げられ、なかでも耐劣化特性の点から特に
ジクミルパーオキサイドが好適に用いられる。
The organic peroxide used in the present invention is not particularly limited as long as it is a commonly used organic peroxide.
For example, dicumyl peroxide, 1,3-bis (t-
Butylperoxyisopropyl) -benzene, 2,5-
Dimethyl-2,5-di (butylperoxy) -hexyne-3 and the like, among which dicumyl peroxide is particularly preferably used from the viewpoint of deterioration resistance.

【0011】本発明において、上記有機過酸化物の配合
量はポリオレフィン樹脂100重量部に対して0.1〜
1.0重量部である。有機過酸化物の配合量が0.1重
量部未満であると耐劣化特性に劣るため、また、1.0
重量部を超えると組成物のゲル分率が上昇するため好ま
しくない。
In the present invention, the amount of the organic peroxide is 0.1 to 100 parts by weight of the polyolefin resin.
1.0 part by weight. When the compounding amount of the organic peroxide is less than 0.1 part by weight, the deterioration resistance is poor.
Exceeding the weight part is not preferred because the gel fraction of the composition increases.

【0012】また、本発明の組成物には、本発明の目的
を損なわない範囲でポリオレフィン樹脂に対し通常用い
られる各種添加剤、例えば、ステアリン酸やステアリン
酸亜鉛などの滑剤、充填剤、顔料などを必要に応じて適
宜添加してもよい。
The composition of the present invention may contain various additives usually used for polyolefin resins, such as lubricants such as stearic acid and zinc stearate, fillers and pigments, so long as the objects of the present invention are not impaired. May be appropriately added as necessary.

【0013】本発明においては、上記ポリオレフィン樹
脂に老化防止剤と有機過酸化物とを配合したものを加熱
して、老化防止剤を変成させる。加熱温度は140〜3
00℃であり、加熱温度が140℃よりも低い場合は老
化防止剤と有機過酸化物との反応が不十分となるため耐
劣化特性の点から好ましくなく、また、加熱温度が30
0℃よりも高い場合にはポリオレフィンの熱劣化が起き
るため好ましくない。本発明において上記加熱は、ポリ
オレフィン樹脂に老化防止剤と有機過酸化物とを配合し
た後であればいつでも行うことができる。例えば、一般
的にケーブル用の組成物は、樹脂に配合剤を配合した後
これらを混練し、成形して最終製品とするが、加熱は混
練時や混練後、または、成形時や成形後に行ってもよ
い。
In the present invention, a mixture of the above-mentioned polyolefin resin and an antioxidant and an organic peroxide is heated to denature the antioxidant. Heating temperature is 140-3
When the heating temperature is lower than 140 ° C., the reaction between the antioxidant and the organic peroxide becomes insufficient, which is not preferable from the viewpoint of deterioration resistance.
If the temperature is higher than 0 ° C., thermal degradation of the polyolefin occurs, which is not preferable. In the present invention, the heating can be performed at any time after the polyolefin resin is blended with the antioxidant and the organic peroxide. For example, in general, a composition for a cable is prepared by compounding a compounding agent into a resin and then kneading them and molding to obtain a final product. You may.

【0014】本発明の組成物は、上記の加熱を行った後
においても架橋されていない非架橋型組成物である。な
お、本発明において非架橋型樹脂組成物とは加熱後のゲ
ル分率が25%以下である組成物をいう。通常有機過酸
化物はポリオレフィン樹脂の架橋のために配合される
が、本発明における有機過酸化物の役割は、老化防止剤
と反応させ老化防止剤を変性させることにあるため、ポ
リオレフィン樹脂は架橋されないことが好ましい。
The composition of the present invention is a non-crosslinked composition which is not crosslinked even after the above-mentioned heating. In the present invention, the non-crosslinked resin composition refers to a composition having a gel fraction of 25% or less after heating. Usually, the organic peroxide is blended for crosslinking of the polyolefin resin, but the role of the organic peroxide in the present invention is to react with the antioxidant to modify the antioxidant, so that the polyolefin resin is crosslinked. Preferably not.

【0015】[0015]

【実施例】【Example】

(実施例1)ポリエチレン(メルトフローレイト=1.
0g/10分)100重量部に対し、老化防止剤4,
4’−チオビス(3−メチル−6−t−ブチルフェノー
ル)を0.2重量部と、有機過酸化物ジクミルパーオキ
サイドを0.2重量部とを配合して混練した組成物を1
40℃で加熱した。
(Example 1) Polyethylene (melt flow rate = 1.
0 g / 10 min) 100 parts by weight, antioxidant 4,
A composition obtained by mixing and kneading 0.2 part by weight of 4′-thiobis (3-methyl-6-t-butylphenol) and 0.2 part by weight of an organic peroxide dicumyl peroxide was mixed with 1 part.
Heated at 40 ° C.

【0016】(実施例2)ポリエチレン(メルトフロー
レイト=1.0g/10分)100重量部に対し、老化
防止剤4,4’−チオビス(3−メチル−6−t−ブチ
ルフェノール)を0.1重量部と、有機過酸化物1,3
−ビス(t−ブチルパーオキシイソプロピル)−ベンゼ
ンを1.0重量部とを配合して混練した組成物を300
℃で加熱した。
(Example 2) Antioxidant 4,4'-thiobis (3-methyl-6-t-butylphenol) was added in an amount of 0.1 part by weight to 100 parts by weight of polyethylene (melt flow rate = 1.0 g / 10 minutes). 1 part by weight and organic peroxide 1,3
-Bis (t-butylperoxyisopropyl) -benzene and 1.0 part by weight were mixed and kneaded to obtain a composition of 300 parts.
Heated at ° C.

【0017】(実施例3)エチレン−プロピレン共重合
体(メルトフローレイト=5.0g/10分)100重
量部に対し、老化防止剤4,4’−チオビス(3−メチ
ル−6−t−ブチルフェノール)を5.0重量部と、有
機過酸化物2,5−ジメチル−2,5−ジ(ブチルパー
オキシ)−ヘキシン−3を0.1重量部とを配合して混
練した組成物を200℃で加熱した。
(Example 3) 100 parts by weight of an ethylene-propylene copolymer (melt flow rate = 5.0 g / 10 minutes) was added to an antioxidant 4,4'-thiobis (3-methyl-6-t-). Butylphenol) and 0.1 part by weight of an organic peroxide 2,5-dimethyl-2,5-di (butylperoxy) -hexyne-3 were mixed and kneaded. Heated at 200 ° C.

【0018】(比較例1)ポリエチレン(メルトフロー
レイト=1.0g/10分)100重量部に対し、老化
防止剤4,4’−チオビス(3−メチル−6−t−ブチ
ルフェノール)を0.2重量部を配合して混練した組成
物を140℃で加熱した。
Comparative Example 1 Antioxidant 4,4'-thiobis (3-methyl-6-t-butylphenol) was added in an amount of 0.1 part by weight to 100 parts by weight of polyethylene (melt flow rate = 1.0 g / 10 minutes). The composition obtained by mixing and kneading 2 parts by weight was heated at 140 ° C.

【0019】(比較例2)ポリエチレン(メルトフロー
レイト=1.0g/10分)100重量部に対し、老化
防止剤4,4’−チオビス(3−メチル−6−t−ブチ
ルフェノール)を0.08重量部と、有機過酸化物1,
3−ビス(t−ブチルパーオキシイソプロピル)−ベン
ゼンを1.5重量部とを配合して混練した組成物を32
0℃で加熱した。
Comparative Example 2 Antioxidant 4,4'-thiobis (3-methyl-6-t-butylphenol) was added in an amount of 0.1 part by weight to 100 parts by weight of polyethylene (melt flow rate = 1.0 g / 10 minutes). 08 parts by weight and organic peroxide 1,
A composition obtained by mixing and kneading 3-bis (t-butylperoxyisopropyl) -benzene with 1.5 parts by weight was mixed with 32 parts.
Heated at 0 ° C.

【0020】(比較例3)エチレン−プロピレン共重合
体(メルトフローレイト=5.0g/10分)100重
量部に対し、老化防止剤4,4’−チオビス(3−メチ
ル−6−t−ブチルフェノール)を5.5重量部と、有
機過酸化物2,5−ジメチル−2,5−ジ(ブチルパー
オキシ)−ヘキシン−3を0.08重量部とを配合して
混練した組成物を120℃で加熱した。
Comparative Example 3 An antiaging agent 4,4′-thiobis (3-methyl-6-t-) was added to 100 parts by weight of an ethylene-propylene copolymer (melt flow rate = 5.0 g / 10 minutes). Butylphenol) and 0.08 parts by weight of an organic peroxide 2,5-dimethyl-2,5-di (butylperoxy) -hexyne-3 were mixed and kneaded. Heated at 120 ° C.

【0021】上記実施例1〜3、及び比較例1〜3にて
得られた組成物について、耐劣化特性及びゲル分率を評
価した。結果を表1に示す。評価方法は以下の通りであ
る。 (耐劣化特性)耐劣化特性は、170℃で加熱を行なっ
ていき、組成物の伸び率残率が50%となったときの加
熱時間によって評価した。なお、伸び率はJIS C3
005に準拠して測定した。 (ゲル分率)ゲル分率はASTM D2765に準拠し
て測定した。
The compositions obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated for deterioration resistance and gel fraction. Table 1 shows the results. The evaluation method is as follows. (Deterioration Resistance) Deterioration resistance was evaluated by heating at 170 ° C. and heating time when the residual elongation percentage of the composition became 50%. The elongation is based on JIS C3
005. (Gel fraction) The gel fraction was measured according to ASTM D2765.

【0022】[0022]

【表1】 [Table 1]

【0023】[0023]

【発明の効果】本発明のケーブル用の非架橋型樹脂組成
物は、ポリオレフィン樹脂100重量部に対しヒンダー
ドフェノール系老化防止剤0.1〜5.0重量部と有機
過酸化物0.1〜1.0重量部とを配合してなり、14
0〜300℃で加熱してなる組成物であって、加熱後の
ゲル分率が25%以下であることによって、耐劣化特性
に優れた組成物を得ることができる。
The non-crosslinked resin composition for a cable according to the present invention comprises 0.1 to 5.0 parts by weight of a hindered phenolic antioxidant and 0.1 part by weight of an organic peroxide based on 100 parts by weight of a polyolefin resin. ~ 1.0 parts by weight, 14
A composition heated at 0 to 300 ° C. and having a gel fraction of 25% or less after heating can provide a composition having excellent resistance to deterioration.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ポリオレフィン樹脂100重量部に対し
ヒンダードフェノール系老化防止剤0.1〜5.0重量
部と有機過酸化物0.1〜1.0重量部とを配合してな
り、140〜300℃で加熱してなる組成物であって、
加熱後のゲル分率が25%以下であることを特徴とする
ケーブル用の非架橋型樹脂組成物。
1. A blend of 0.1 to 5.0 parts by weight of a hindered phenolic antioxidant and 0.1 to 1.0 parts by weight of an organic peroxide with respect to 100 parts by weight of a polyolefin resin. A composition heated at ~ 300 ° C,
A non-crosslinked resin composition for a cable, wherein the gel fraction after heating is 25% or less.
JP15774297A 1997-05-30 1997-05-30 Non-crosslinked resin composition for cable Pending JPH10334740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15774297A JPH10334740A (en) 1997-05-30 1997-05-30 Non-crosslinked resin composition for cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15774297A JPH10334740A (en) 1997-05-30 1997-05-30 Non-crosslinked resin composition for cable

Publications (1)

Publication Number Publication Date
JPH10334740A true JPH10334740A (en) 1998-12-18

Family

ID=15656367

Family Applications (1)

Application Number Title Priority Date Filing Date
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010110559A3 (en) * 2009-03-24 2010-12-23 Sk Energy Co., Ltd.. Uncrosslinked polyethylene composition for power cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010110559A3 (en) * 2009-03-24 2010-12-23 Sk Energy Co., Ltd.. Uncrosslinked polyethylene composition for power cable
CN102361926A (en) * 2009-03-24 2012-02-22 Sk新技术 Uncrosslinked polyethylene composition for power cable
US8729393B2 (en) 2009-03-24 2014-05-20 Sk Innovation Co., Ltd. Uncrosslinked polyethylene composition for power cable

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