JPS633049A - Resin composition - Google Patents
Resin compositionInfo
- Publication number
- JPS633049A JPS633049A JP14505886A JP14505886A JPS633049A JP S633049 A JPS633049 A JP S633049A JP 14505886 A JP14505886 A JP 14505886A JP 14505886 A JP14505886 A JP 14505886A JP S633049 A JPS633049 A JP S633049A
- Authority
- JP
- Japan
- Prior art keywords
- resin composition
- density polyethylene
- propylene
- polypropylene polymer
- breakdown voltage
- 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
- 239000011342 resin composition Substances 0.000 title claims abstract description 16
- -1 polypropylene Polymers 0.000 claims abstract description 20
- 229920001155 polypropylene Polymers 0.000 claims abstract description 19
- 239000004743 Polypropylene Substances 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 18
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 17
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 17
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000005977 Ethylene Substances 0.000 claims abstract description 5
- 229920005604 random copolymer Polymers 0.000 claims abstract description 5
- 229920001400 block copolymer Polymers 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 7
- 229920001519 homopolymer Polymers 0.000 claims description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims 3
- 230000015556 catabolic process Effects 0.000 abstract description 15
- 239000008199 coating composition Substances 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 229920001384 propylene homopolymer Polymers 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は樹脂組成物に関し、更に詳しくは電線の被覆絶
縁樹脂組成物として極めて好適な樹脂組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a resin composition, and more particularly to a resin composition that is extremely suitable as an insulating resin composition for covering electric wires.
電ｗａ中特に電カケープルの被覆絶縁樹脂組成物として
は各種の樹脂を主成分とするものが使用されているが、
優れた耐破壊電圧性を有する架橋ポリエチレンが主流と
なって来ている。Insulating resin compositions containing various resins as main components are used as coating insulating resin compositions for electric cables, especially electric cables.
Crosslinked polyethylene, which has excellent breakdown voltage resistance, has become mainstream.
しかしながら最近の技術分野の向上により、この種を線
就中電カケープルに於いても、益々高性能が要求され、
耐破壊電圧についてもより−、！！優れたものが強く要
求されるようになって来た。However, with recent improvements in the technical field, even in this type of line-based electric cable, higher performance is required.
More about breakdown voltage! ! There has been a strong demand for superior products.
本発明が解決しようとする問題点は、上記要求に応えう
る新しい樹脂組成物を開発することであり、更に詳しく
は、従来の架橋ポリエチレンからなる樹脂組成物よりも
、更に一層優れたｉ５を破壊電圧性を有する樹脂組成物
を開発することである。The problem to be solved by the present invention is to develop a new resin composition that can meet the above requirements. The objective is to develop a resin composition that has voltage properties.
この問題点はポリプロピレン系重合体と低密度ポリエチ
レンとを好ましくはある特定割合で混合したものを樹脂
組成物として使用することにより達成される。即ち本発
明は、ポリプロピレン系重合体と低密度ポリエチレンと
を含有してなる樹脂組成物に係るものである
本発明者の研究に依ると、ポリプロピレン系重合体は架
橋直鎖状ポリエチレンや低密度ポリエチレンに比し破壊
電圧就中インパルス破壊電圧が高いという優れた性質を
有することが判明した。しかしながらこのポリプロピレ
ン系重合体は高融点並びに高結晶化度を有し、特に高結
晶性であるがために、可撓性に乏しく、電線就中型カケ
ープルの絶縁被覆用組成物としては、このままでは実用
上支障があることが判明した。This problem can be solved by using a mixture of a polypropylene polymer and low density polyethylene, preferably in a certain ratio, as a resin composition. That is, the present invention relates to a resin composition containing a polypropylene polymer and a low-density polyethylene.According to the research of the present inventor, the polypropylene polymer is a crosslinked linear polyethylene or a low-density polyethylene. It has been found that this material has superior properties such as a high breakdown voltage, particularly a high impulse breakdown voltage. However, this polypropylene polymer has a high melting point and a high degree of crystallinity, and because it is particularly highly crystalline, it has poor flexibility and cannot be used as it is as an insulating coating composition for medium-sized cables. It turned out that there was a problem.
よって更に研究を続けるうち、このポリプロピレン系重
合体を低密度ポリエチレンと併用するときは、特にこれ
等両者を特定の配合割合で併用するときは、優れたイン
パルス破壊電圧と、実用上支障の無い程度の可撓性とを
具備するに至ることを見出し、これに基づく本発明を完
成したものである。Therefore, as we continued our research, we found that when this polypropylene polymer is used in combination with low-density polyethylene, especially when these two are used together in a specific blending ratio, it has an excellent impulse breakdown voltage and a level that does not cause any practical problems. The present invention has been completed based on this discovery.
本発明の樹脂組成物は、基本的にはポリプロピレン系重
合体と低密度ポリエチレンとを含有して成るものであり
、更に好ましくは、これ等両者または其のいずれか一方
が更に架橋されたものである。The resin composition of the present invention basically contains a polypropylene polymer and low density polyethylene, and more preferably, both or one of them is further crosslinked. be.
本発明で使用するポリプロピレン系重合体はプロピレン
の単独重合体とプロピレンとエチレンとの共重合体（エ
チレン含有１１０重１％以下）とを包含するものである
。そして共重合体としては、ランダム共重合体、ブロッ
ク共重合体が使用される。The polypropylene polymer used in the present invention includes a propylene homopolymer and a copolymer of propylene and ethylene (ethylene content of 110% by weight or less). As the copolymer, a random copolymer or a block copolymer is used.
融点は通常１６３〜１６６℃好ましくは１６３〜１６４
℃程度で、また単独重合体やランダム共重合体の結晶化
度は５０〜５５重量％程度のものが好ましい。Melting point is usually 163-166℃, preferably 163-164℃
℃, and the degree of crystallinity of the homopolymer or random copolymer is preferably about 50 to 55% by weight.
また本発明に於いて使用する低密度ポリエチレンとして
も、これ自体は従来から良（知られたものであり、其の
密度が２０℃に於いて０．９３５ｇ／ｃｄに達しないも
のが使用され、好ましくは密度０．９２０ｇ／−以下の
ものである。Furthermore, the low-density polyethylene used in the present invention is one that has been known in the past and has a density of less than 0.935 g/cd at 20°C. Preferably, the density is 0.920 g/- or less.
これ等両者の配合割合は、ポリプロピレン系重合体が５
〜９５重量％、低密度ポリエチレンが９５〜５重量％の
範囲好ましくは前者２０〜８０重量％、後者８０〜２０
重景％の範囲がら適宜に決定される。これ等の配合割合
の変化により若干インパルス破壊電圧並びに可撓性が変
化するが、上記範囲内、特に好ましいとされる上記範囲
内では、実用上支障の無い可撓性と優れた破壊電圧が発
揮される。The blending ratio of these two is 5% polypropylene polymer.
~95% by weight, low density polyethylene in the range of 95 to 5% by weight, preferably the former 20 to 80% by weight, the latter 80 to 20% by weight.
It is determined as appropriate based on the range of weighted background percentage. Impulse breakdown voltage and flexibility will change slightly due to changes in these blending ratios, but within the above range, particularly within the above range which is considered preferable, flexibility and excellent breakdown voltage that will not cause any practical problems will be exhibited. be done.
特に本発明に於いては使用するポリプロピレン系重合体
の種類に応して上記範囲内で更に低密度ポリエチレンと
の配合割合を適宜選択することが好ましい、たとえばポ
リプロピレン系重合体が単独重合体の場合は５〜９０重
量％特に好ましくは２０〜８０重量％程度、またランダ
ム共重合体の場合は５〜５０重量％特に好ましくは２０
〜４゜重量％、ブロック共重合体の場合は１０〜８０重
量％特に好ましくは２０〜６０重量％程度である。In particular, in the present invention, it is preferable to appropriately select the blending ratio with low density polyethylene within the above range depending on the type of polypropylene polymer used. For example, when the polypropylene polymer is a homopolymer. is 5 to 90% by weight, particularly preferably about 20 to 80% by weight, and in the case of random copolymers, 5 to 50% by weight, particularly preferably 20% by weight.
-4% by weight, in the case of block copolymers, about 10-80% by weight, particularly preferably about 20-60% by weight.
また本発明に於いては、これ等ポリプロピレン系重合体
及び低密度ポリエチレンのいずれか一方または双方を適
当な架橋剤を、或いは電子線等を用いる通常の架橋手段
で架橋することができる。Further, in the present invention, either or both of these polypropylene polymers and low density polyethylene can be crosslinked using a suitable crosslinking agent or by a conventional crosslinking method using an electron beam or the like.
これにより、更に耐熱性を向上せしめることができる。Thereby, heat resistance can be further improved.
本発明の組成物には必要に応じて従来からこの種組成物
に使用されて来た各種の添加剤を添加するを妨げない、
その具体例としては、たとえば各種顔料、充填剤、老化
防止剤、難燃化剤、滑剤、電圧安定剤等を例示すること
が出来る。Various additives conventionally used in compositions of this type may be added to the composition of the present invention as necessary.
Specific examples include various pigments, fillers, anti-aging agents, flame retardants, lubricants, voltage stabilizers, and the like.
また本発明の組成物には、上記特性を損なわない範囲で
他の樹脂を配合することも出来る。これ等信の樹脂とし
ては、たとえばＥＶＡ （エチレン−酢酸ビニル共重合
体） 、ＥＥＡ （エチレン−エチルアクリレート共重
合体）等を挙げることが出来る。Further, other resins can be added to the composition of the present invention within a range that does not impair the above characteristics. Examples of such resins include EVA (ethylene-vinyl acetate copolymer) and EEA (ethylene-ethyl acrylate copolymer).
以下に実施例を挙げて本発明を説明する。 The present invention will be explained below with reference to Examples.
実施例１
第１表に示す所定の原料を第１〜４図に示す所定の割合
で混合して各種の組成物を調べた。Example 1 Various compositions were investigated by mixing the predetermined raw materials shown in Table 1 in the predetermined ratios shown in FIGS. 1 to 4.
第１表
注１＝プロピレン単独重合体
注２：エチレンープロピレンランダム共重合体注３＝エ
チレン−プロピレンブロック共重合体性４：エチレンー
プロピレンブロック共重合体注５＝低密度ポリエチレン
此の各種組成物夫々について第５図に示すリセスシート
（リセス部属＝約１ｔＩ）に成形し、試料とした。この
試料についてインパルス破壊電圧を次の様にして測定し
た。Table 1 Note 1 = Propylene homopolymer Note 2: Ethylene-propylene random copolymer Note 3 = Ethylene-propylene block copolymer Property 4: Ethylene-propylene block copolymer Note 5 = Low-density polyethylene Various compositions Each material was molded into a recessed sheet (recess portion = approximately 1 tI) shown in FIG. 5, and used as a sample. The impulse breakdown voltage of this sample was measured as follows.
（インパルス破壊電圧の測定）ＩＸ４０μ秒負極性標準
波を用い、破壊予想電圧の７０％値から５ｋＶ／１回の
ステップ昇圧法にて、シリコンオイル中、各電圧で３回
印加により破壊に至らしめた。(Measurement of impulse breakdown voltage) Using an IX 40 μsec negative polarity standard wave, apply a step-up method of 5 kV/time from 70% of the expected breakdown voltage to reach breakdown by applying each voltage three times in silicone oil. Ta.
また、各試料の物理特性（可撓性）は、ＩＷＭ厚シート
に成形後、恒温槽付引張試験機によって測定した。結晶
化度の算出には、データ処理’Ａ’ｌｌ付き示差熱分析
器（ＤＳＣ）を用いた。In addition, the physical properties (flexibility) of each sample were measured using a tensile tester equipped with a constant temperature oven after forming into an IWM thick sheet. A differential thermal analyzer (DSC) with data processing 'A'll was used to calculate the degree of crystallinity.
物理特性（可撓性）の測定結果を第１〜４図に、またイ
ンパルス破壊電圧の測定結果を第６〜９図に示した。The measurement results of physical properties (flexibility) are shown in Figs. 1 to 4, and the measurement results of impulse breakdown voltage are shown in Figs. 6 to 9.
但し、第１〜４図中実線は降伏点応力を、また点線は伸
びを示す、また第１図並びに第２図中、ＬＤＰＥは夫々
低密度ポリエチレンを示す。第５図の番号は夫々（１）
がエポキシ樹脂、（２）が導電性ペイント、（３）がプ
ラス電極、（４）が試料、（５）がポリ塩化ビニル、（
６）が高圧側平円板電極を示す。However, the solid line in FIGS. 1 to 4 indicates the stress at yield point, and the dotted line indicates elongation. In FIGS. 1 and 2, LDPE indicates low density polyethylene. The numbers in Figure 5 are (1) respectively.
is epoxy resin, (2) is conductive paint, (3) is positive electrode, (4) is sample, (5) is polyvinyl chloride, (
6) shows the high voltage side flat disk electrode.
本発明の組成物は、従来の架橋ポリエチレンを主体とす
る樹脂組成物よりも更に優れたインパルス破壊電圧を有
し、且つ実用上支障のない可撓性を有するので、電線就
中量カケープルの絶縁被覆用組成物として極めて好適な
ものであり、その産業上の利用性は極めて高い。The composition of the present invention has an impulse breakdown voltage superior to that of conventional resin compositions mainly composed of crosslinked polyethylene, and has flexibility that does not pose a problem in practical use. It is extremely suitable as a coating composition and has extremely high industrial applicability.
第１〜４図は、樹脂組成物の混合比と物理特性との関係
を示すグラフであり、第６〜９圓は同じくインパルス破
壊電圧との関係を示すグラフである。また第５図はりセ
スシートシステムを示す概略図である。
１・・・・エポキシ樹脂
２・・・・導電性ペイント
３・・・・プラス電極
４・・・・試料
５・・・・ポリ塩化ビニル
６・・・・平円板電極（プラス）
（以上）
第１図
長委比率
第２図
満＠−π単
第３図
ン良、４ミトレＣ三叫り
第４図
５先・−ξ；≧、＋（ｊシュ
第６図
混りに輩
混々Ｊｔ卑1 to 4 are graphs showing the relationship between the mixing ratio of the resin composition and the physical properties, and 6th to 9th circles are graphs showing the relationship to the impulse breakdown voltage. FIG. 5 is a schematic diagram showing a beam access sheet system. 1... Epoxy resin 2... Conductive paint 3... Positive electrode 4... Sample 5... Polyvinyl chloride 6... Flat disk electrode (positive) (or more) ) Figure 1 Chair ratio Figure 2 Full @ -π single Figure 3 N good, 4 Mitre C three shouts Figure 4 5 ahead -ξ; Jt low
Claims (5)
からなり、ポリプロピレン系重合体と低密度ポリエチレ
ンとの混合比が前者９５〜５重量％、後者５〜９５重量
％である樹脂組成物。(1) A resin composition consisting of a polypropylene polymer and low density polyethylene, in which the mixing ratio of the polypropylene polymer and low density polyethylene is 95 to 5% by weight of the former and 5 to 95% by weight of the latter.
合体である特許請求の範囲第１項に記載の組成物。(2) The composition according to claim 1, wherein the polypropylene polymer is a homopolymer of propylene.
のランダム共重合体である特許請求の範囲第１項に記載
の組成物。(3) The composition according to claim 1, wherein the polypropylene polymer is a random copolymer of propylene and ethylene.
のブロック共重合体である特許請求の範囲第１項に記載
の組成物。(4) The composition according to claim 1, wherein the polypropylene polymer is a block copolymer of propylene and ethylene.
の少なくとも一種が架橋したものである特許請求の範囲
第１項に記載の組成物。(5) The composition according to claim 1, wherein at least one of a polypropylene polymer and a low density polyethylene is crosslinked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14505886A JPS633049A (en) | 1986-06-20 | 1986-06-20 | Resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14505886A JPS633049A (en) | 1986-06-20 | 1986-06-20 | Resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS633049A true JPS633049A (en) | 1988-01-08 |
Family
ID=15376404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14505886A Pending JPS633049A (en) | 1986-06-20 | 1986-06-20 | Resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS633049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837476A2 (en) * | 1996-10-17 | 1998-04-22 | Union Carbide Chemicals & Plastics Technology Corporation | Tree resistant cable |
| JP2018518567A (en) * | 2015-06-11 | 2018-07-12 | ダウ グローバル テクノロジーズ エルエルシー | Cable insulation comprising a blend of LDPE and polypropylene |
-
1986
- 1986-06-20 JP JP14505886A patent/JPS633049A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837476A2 (en) * | 1996-10-17 | 1998-04-22 | Union Carbide Chemicals & Plastics Technology Corporation | Tree resistant cable |
| EP0837476A3 (en) * | 1996-10-17 | 1998-08-12 | Union Carbide Chemicals & Plastics Technology Corporation | Tree resistant cable |
| JP2018518567A (en) * | 2015-06-11 | 2018-07-12 | ダウ グローバル テクノロジーズ エルエルシー | Cable insulation comprising a blend of LDPE and polypropylene |
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