JPH0198643A - Polyethylene composition - Google Patents
Polyethylene compositionInfo
- Publication number
- JPH0198643A JPH0198643A JP25795287A JP25795287A JPH0198643A JP H0198643 A JPH0198643 A JP H0198643A JP 25795287 A JP25795287 A JP 25795287A JP 25795287 A JP25795287 A JP 25795287A JP H0198643 A JPH0198643 A JP H0198643A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- weight
- density
- oxidative deterioration
- deterioration inhibitor
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- -1 Polyethylene Polymers 0.000 title claims description 8
- 239000004698 Polyethylene Substances 0.000 title claims description 8
- 229920000573 polyethylene Polymers 0.000 title claims description 8
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000006866 deterioration Effects 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 15
- 239000003112 inhibitor Substances 0.000 claims description 13
- 229920001684 low density polyethylene Polymers 0.000 claims description 6
- 239000004702 low-density polyethylene Substances 0.000 claims description 6
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 abstract 3
- 230000003078 antioxidant effect Effects 0.000 abstract 3
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 abstract 1
- 239000004708 Very-low-density polyethylene Substances 0.000 description 7
- 229920001866 very low density polyethylene Polymers 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003679 aging effect Effects 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、酸化劣化防止剤の添加によるブルームの発生
を抑制したポリエチレン組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polyethylene composition in which the occurrence of bloom is suppressed by the addition of an oxidative deterioration inhibitor.
〈従来の技術〉
架橋ポリエチレン（以下、ＸＬＰＥと略記する）では、
酸化劣化の防止は勿論のこと、例えば押出し中のスコー
チ（早期加硫）を防ぐためもあって、一般に、酸化劣化
防止剤が添加される。<Prior art> In cross-linked polyethylene (hereinafter abbreviated as XLPE),
An oxidative deterioration inhibitor is generally added not only to prevent oxidative deterioration but also to prevent scorch (early vulcanization) during extrusion, for example.
〈発明が解決しようとする問題点〉
ところが、この酸化劣化の防止効果を十分得るためには
、ある程度の酸化劣化防止剤を添加する必要がある一方
で、この添加量が多くなると（ポリエチレンの飽和溶解
量を越えるようになると）、ペレットのまま長期間保管
しておいた場合、ペレット表面に酸化劣化防止剤がブル
ームとして滲み出したり、あるいはペレットにブルーム
として）参み出さないまでも、ＸＬＰＥ組成物をテープ
状等に加工した場合、体積に比べて表面積が大きくなる
ので、やはり酸化劣化防止剤がブルームとして滲み出し
てくるという問題があった。<Problems to be solved by the invention> However, in order to sufficiently obtain the effect of preventing oxidative deterioration, it is necessary to add a certain amount of oxidative deterioration inhibitor; If the dissolved amount is exceeded), and if the pellets are stored for a long period of time, the oxidative deterioration inhibitor may ooze out as a bloom on the pellet surface, or the XLPE composition may not ooze out (as a bloom on the pellet). When an object is processed into a tape shape or the like, the surface area becomes large compared to the volume, so there is a problem in that the oxidative deterioration inhibitor oozes out as a bloom.
このようなブルームし易い組成物からなるテープを、例
えば、電カケープルの接続部の絶縁体として使用する場
合、電気特性の低下等は勿論のこと、テープ巻き工程の
作業性の低下を招来する等の問題も生じる。When a tape made of such a composition that is prone to blooming is used, for example, as an insulator for the connection part of an electric cable, it not only causes a decrease in electrical properties, but also a decrease in the workability of the tape winding process. The problem also arises.
そこで、本発明者等は、所望量の酸化劣化防止剤の添加
を行っても、弊害のないポリエチレン組成物について、
鋭意検討したところ、酸化劣化防止剤と、特定密度の超
低密度ポリエチレン（以下、ＶＬＤＰＥと略記する）お
よび低密度ポリエチレン（以下、ＬＤＰＥと略記する）
とを併用することにより、プルームの発生を効果的に抑
制できることを見出した。Therefore, the present inventors have developed a polyethylene composition that does not cause any adverse effects even if a desired amount of an oxidative deterioration inhibitor is added.
After careful study, we found that oxidative deterioration inhibitors, very low density polyethylene (hereinafter abbreviated as VLDPE) and low density polyethylene (hereinafter abbreviated as LDPE) with specific densities.
It has been found that the generation of plumes can be effectively suppressed by using them together.
本発明は、このような観点に立ってなされたものである
。The present invention has been made from this viewpoint.
〈問題点を解決するための手段及びその作用〉か〜る本
発明の特徴とする点は、密度０．８８〜０． ９１ ｇ
／ｃｍ’のＶＬＤＰＥ５〜５０重量部と、密度０．９１
〜０．９４ ｇ／ｃｍ３のＬＤＰＥ９５〜５０重量部と
、酸化劣化防止剤０．１〜０．４重量部と、ジクミルパ
ーオキサイド（以下、ＤＣＰと略記する）１．０〜３．
０重量部とからなるポリエチレン組成物にある。<Means for solving the problems and their effects> The features of the present invention are as follows: The density is 0.88-0. 91g
/cm' of VLDPE 5-50 parts by weight and a density of 0.91
95 to 50 parts by weight of LDPE of ~0.94 g/cm3, 0.1 to 0.4 parts by weight of an oxidative deterioration inhibitor, and 1.0 to 3 parts of dicumyl peroxide (hereinafter abbreviated as DCP).
0 parts by weight of the polyethylene composition.
具体的な配合にあたっては、ＶＬＤＰＥとＬＤＰＥの所
望量を合計１００重量部になるようにブレンドした後、
酸化劣化防止剤を配合して混和物を作り、この混和物に
ＤＣＰを添加する。For specific formulation, after blending the desired amounts of VLDPE and LDPE to a total of 100 parts by weight,
An oxidative deterioration inhibitor is blended to form a blend, and DCP is added to this blend.
この配合により、十分な架橋度と老化特性があると同時
に、プルームの発生のないポリエチレン組成物を得るこ
とができる。その理由としては、ＶＬＤＰＥは非晶部分
が多く、この非晶部分に酸化劣化防止剤が溶は込むから
と考えられる。This formulation makes it possible to obtain a polyethylene composition that has a sufficient degree of crosslinking and aging properties, and at the same time does not generate plumes. The reason for this is thought to be that VLDPE has many amorphous parts, and the oxidative deterioration inhibitor dissolves into these amorphous parts.
このような本発明で用いるＶＬＤＰＥの配合部数を、５
〜５０重量部としたのは、ｓｌｉ量部束部未満プルーム
が生じ、５０重量部を越えると組成物の機械的特性、特
に引張り強度が弱くなるからである。The number of blended parts of VLDPE used in the present invention is 5.
The reason for setting the amount to 50 parts by weight is that plumes occur when the amount is less than sli, and if it exceeds 50 parts by weight, the mechanical properties of the composition, particularly the tensile strength, become weak.
また、本発明で用いるＬＤＰＥの配合部数を、９５〜５
０重量部としたのは、上述のようにＶＬＤＰＥとの合計
重量部数が１００重量部となるようにするためである。In addition, the number of blended parts of LDPE used in the present invention is 95 to 5.
The reason for setting it to 0 parts by weight is to make the total number of parts by weight with VLDPE to be 100 parts by weight as described above.
また、本発明で使用する酸化劣化防止剤としては、４．
４′−チオビス−（６−タージャジー−ブチル−３−メ
チルフェノール）（以下、４．４′−チオビスと略記す
る）、ビス［２−メチル−４−（３−ｎ−アルキル（Ｃ
＋ｇまたはＣ１４）チオプロピオニルオキシ）−５−タ
ーシャリーープチルフェニル］スルフィド等が挙げられ
る。そして、その配合部数を、０．１〜０．４重量部と
したのは、０．１重量部未満では少な過ぎて老化特性が
悪く、また０、４重量部を越えるとプルームが生じるよ
うになるからである。Further, as the oxidative deterioration inhibitor used in the present invention, 4.
4'-thiobis-(6-terjadi-butyl-3-methylphenol) (hereinafter abbreviated as 4.4'-thiobis), bis[2-methyl-4-(3-n-alkyl (C
+g or C14) thiopropionyloxy)-5-tertiarybutylphenyl] sulfide, and the like. The number of parts blended is 0.1 to 0.4 parts by weight because if it is less than 0.1 parts by weight, it is too small and the aging properties are bad, and if it exceeds 0.4 parts by weight, plumes will occur. Because it will be.
また、本発明で使用するＤＣＰの配合部数を、１、
Ｏ〜３．０重量部としたのは、１．０重量部未満では所
望の十分な架橋度が得られず、３．０重量部を越えると
スコーチが発生するようになるからである。In addition, the number of blended parts of DCP used in the present invention is 1,
The reason why the amount is O to 3.0 parts by weight is that if it is less than 1.0 parts by weight, the desired sufficient degree of crosslinking cannot be obtained, and if it exceeds 3.0 parts by weight, scorch will occur.
〈実施例〉
第１表に示した配合組成による実施例■〜■と、比較例
■〜■の各ポリエチレン組成物を作り、各組成物の架橋
度（ゲル分率）、熱老化試験による熱老化特性、プルー
ム性を調べたところ、その結果は、第１表併記の如くで
あった。<Example> Polyethylene compositions of Examples ■ to ■ and Comparative Examples ■ to ■ were prepared using the formulations shown in Table 1, and the degree of crosslinking (gel fraction) of each composition and heat aging test were determined. When the aging characteristics and plume properties were investigated, the results were as shown in Table 1.
なお、熱老化試験は、１６０″Ｃで１２０時間加熱して
行い、その判定は伸び残率が５０％以上を合格とし、特
に、◎は余裕を持っての合格を、Ｏは通常の合格を示し
、×は不合格を示しである。The heat aging test is conducted by heating at 160"C for 120 hours, and the evaluation is that a test with a residual elongation of 50% or more is considered to have passed. In particular, ◎ means a pass with a margin, and O means a normal pass. and × indicates failure.
上記第１表から、架橋度は、すべての各側（実施例■〜
■、比較例■〜■）で十分な値が得られるが、熱老化特
性においては、本実施例■〜■にあってはすべて合格で
あるのに対して、比較例■では不合格となり、また、ブ
ルームの発生は、本実施例■〜■では全く認められない
のに対して、酸化劣化防止剤（４，４”−チオビス）が
０．１以上である比較例■〜■では発生が認められた。From Table 1 above, the degree of crosslinking is determined on each side (Examples
(■, Comparative Examples (■ to ■)), but in terms of heat aging characteristics, Examples (■ to ■) all passed, while Comparative Example (■) failed. In addition, while no blooming was observed in Examples ■ to ■, no blooming was observed in Comparative Examples Admitted.
〈発明の効果〉
以上の説明から明らかなように本発明によれば、酸化劣
化防止剤を通常用いる所定量添加しても、プルームの発
生がなく、十分な架橋度と、従来と同様か、あるいはそ
れ以上の老化特性を存する優れたポリエチレン組成物を
提供することができる。<Effects of the Invention> As is clear from the above description, according to the present invention, even if a predetermined amount of an oxidative deterioration inhibitor is added, no plume is generated, and a sufficient degree of crosslinking is achieved, as is the case with conventional methods. It is possible to provide an excellent polyethylene composition having aging properties that are or even better than these.
勿論、この組成物からなるテープを、例えば電カケープ
ルの接続部の絶縁体として用いれば、作業性の向上を図
ることができる。Of course, if a tape made of this composition is used, for example, as an insulator for the connection part of an electric cable, the workability can be improved.
Claims (1)
チレン５〜５０重量部と、密度０．９１〜０．９４ｇ／
ｃｍ＾３の低密度ポリエチレン９５〜５０重量部と、酸
化劣化防止剤０．１〜０．４重量部と、ジクミルパーオ
キサイド１．０〜３．０重量部とからなるポリエチレン
組成物。5 to 50 parts by weight of ultra-low density polyethylene with a density of 0.88 to 0.91 g/cm^3 and a density of 0.91 to 0.94 g/cm^3
A polyethylene composition comprising 95 to 50 parts by weight of low density polyethylene of cm^3, 0.1 to 0.4 parts by weight of an oxidative deterioration inhibitor, and 1.0 to 3.0 parts by weight of dicumyl peroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62257952A JP2522966B2 (en) | 1987-10-13 | 1987-10-13 | Polyethylene composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62257952A JP2522966B2 (en) | 1987-10-13 | 1987-10-13 | Polyethylene composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0198643A true JPH0198643A (en) | 1989-04-17 |
| JP2522966B2 JP2522966B2 (en) | 1996-08-07 |
Family
ID=17313496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62257952A Expired - Lifetime JP2522966B2 (en) | 1987-10-13 | 1987-10-13 | Polyethylene composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2522966B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869995B2 (en) | 1998-06-16 | 2005-03-22 | Union Carbide Chemicals & Plastics Technology Corporation | Water tree resistant cable |
| JP2008173302A (en) * | 2007-01-18 | 2008-07-31 | Jms Co Ltd | Medical bag rack |
| KR20160119072A (en) * | 2013-12-19 | 2016-10-12 | 보레알리스 아게 | A new low MFR polymer composition, power cable insulation and power cable |
| KR20160119073A (en) * | 2013-12-19 | 2016-10-12 | 보레알리스 아게 | A new polymer composition, power cable insulation and power cable |
| JP2017500413A (en) * | 2013-12-19 | 2017-01-05 | ボレアリス エージー | Novel cross-linked polymer composition, power cable insulation and power cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210150A (en) * | 1987-02-25 | 1988-08-31 | Mitsubishi Cable Ind Ltd | Coating polymer composition |
-
1987
- 1987-10-13 JP JP62257952A patent/JP2522966B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210150A (en) * | 1987-02-25 | 1988-08-31 | Mitsubishi Cable Ind Ltd | Coating polymer composition |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869995B2 (en) | 1998-06-16 | 2005-03-22 | Union Carbide Chemicals & Plastics Technology Corporation | Water tree resistant cable |
| JP2008173302A (en) * | 2007-01-18 | 2008-07-31 | Jms Co Ltd | Medical bag rack |
| KR20160119072A (en) * | 2013-12-19 | 2016-10-12 | 보레알리스 아게 | A new low MFR polymer composition, power cable insulation and power cable |
| KR20160119073A (en) * | 2013-12-19 | 2016-10-12 | 보레알리스 아게 | A new polymer composition, power cable insulation and power cable |
| JP2017500413A (en) * | 2013-12-19 | 2017-01-05 | ボレアリス エージー | Novel cross-linked polymer composition, power cable insulation and power cable |
| JP2017503050A (en) * | 2013-12-19 | 2017-01-26 | ボレアリス エージー | Novel polymer composition, power cable insulation and power cable |
| JP2017503048A (en) * | 2013-12-19 | 2017-01-26 | ボレアリス エージー | Novel low MFR polymer composition, power cable insulation and power cable |
| US10221300B2 (en) | 2013-12-19 | 2019-03-05 | Borealis Ag | Crosslinked polymer composition, power cable insulation and power cable |
| US10347390B2 (en) | 2013-12-19 | 2019-07-09 | Borealis Ag | Polymer composition, power cable insulation and power cable |
| US11355260B2 (en) | 2013-12-19 | 2022-06-07 | Borealis Ag | Low MFR polymer composition, power cable insulation and power cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2522966B2 (en) | 1996-08-07 |
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