JP6122077B2 - 電圧安定剤添加物を伴うポリマー組成物 - Google Patents
電圧安定剤添加物を伴うポリマー組成物 Download PDFInfo
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- JP6122077B2 JP6122077B2 JP2015158022A JP2015158022A JP6122077B2 JP 6122077 B2 JP6122077 B2 JP 6122077B2 JP 2015158022 A JP2015158022 A JP 2015158022A JP 2015158022 A JP2015158022 A JP 2015158022A JP 6122077 B2 JP6122077 B2 JP 6122077B2
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Description
ポリマー成分に加えて、ポリマー組成物はまた、電圧安定化剤(又はVSA)を含む。「電圧安定化剤」は、本明細書中で使用される場合、電場にさらされるとき、ポリマー材に対する損傷を低下させる化合物である。VSAは、電子を捕捉又は不活性化して、絶縁材における電気トリーイングを阻害することができるか、又は、そうでない場合には、(欠陥部又は混入物の近くでの)大きい局在化された電場の効果的な遮蔽を提供し、それにより、ポリオレフィンに損傷を与え得る注入された電子のエネルギー及び/又は頻度を低下させることができると考えられている。VSAをポリマー成分とブレンドすることにより、トリーイングが阻害されるか、又は、そうでない場合には、トリーイングが妨げられる。特定の理論によって何らとらわれないが、VSAが、トリー開始点であるポリマー成分中の欠陥部を満たし、及び/又は、取り囲むと考えられる。欠陥部には、ポリマー成分に存在する空隙部及び/又は不純物が含まれる。
前記ポリマー組成物のどれもが、場合により、1つ又はそれ以上の添加物を含有することができる。好適な添加物の限定されない例には、酸化防止剤、安定剤、加工助剤、スコーチ防止剤及び/又は架橋ブースター(booster)が含まれる。酸化防止剤として、立体的ヒンダードフェノール又は立体的セミヒンダードフェノール、芳香族アミン、脂肪族の立体的ヒンダードアミン、有機ホスファート、チオ化合物及びそれらの混合物を挙げることができる。典型的な架橋ブースターには、ビニル基又はアリル基を有する化合物、例えば、トリアリルシアヌラート、トリアリルイソシアヌラート、及び、ジクリラート、トリアクリラート又はテトラアクリラートが含まれ得る。さらなる添加物として、難燃剤、酸掃去剤、無機フィラー、水トリー遅延剤(water-tree retardant)及び他の電圧安定剤を挙げることができる。
本開示は、本発明のポリマー組成物を含有する物品を提供する。一実施形態において、物品は、導体と、導体上の被覆物とを含む。これにより、被覆された導体が形成される。導体は単独のケーブル又は一緒に束ねられる複数のケーブル(すなわち、ケーブルコア又はコア)であり得る。被覆された導体は、柔軟、半剛体状又は剛体状であり得る。好適な被覆された導体の限定されない例には、柔軟な配線、例えば、家庭用電化製品のための柔軟な配線、電力ケーブル、携帯電話及び/又はコンピューターのための給電ワイヤ、コンピューターのデータ用コード、電源コード、電化製品配線材、並びに、家庭用電化製品の補助コードなどが含まれる。
本明細書中における元素周期表に対するすべての参照は、CRC Press,Inc.が2003年に発行し、著作権を有する元素周期表を参照しなければならない。同様に、族(1つ又はそれ以上)に対する参照はどれも、族を番号表記するためのIUPAC方式を使用してこの元素周期表に反映される当該族(1つ又はそれ以上)に対するものでなければならない。反することが述べられる場合、文脈から暗黙的である場合、又は、当分野において慣例的である場合を除き、すべての部及びパーセントが重量に基づく。米国特許実務の目的のために、どのような特許、特許出願又は刊行物であれ、本明細書中で参照される特許、特許出願又は刊行物の内容は本明細書により、とりわけ、合成技術、定義(但し、本明細書中に提供されるどのような定義とも矛盾しない程度に)、及び、当分野における一般的知識に関しては、それらの全体において参照によって組み込まれる(或いは、それらの同等な米国版が参照によって同様に組み込まれる)。
メルトインデックス(MI)が、エチレン系ポリマーについては、2.16kgの重りを用いて、190℃で、ASTM D1238−01の試験方法に従って測定される。
ポリエチレンホモポリマー(0.92g/cc;MI 2.0g/10分)をBrabender混合ボールにおいて溶融流動化し、その後、電圧安定化剤を、十分な取り込みを保証するために目標のミックス温度及び30rpmで5分間、前記ポリエチレンに溶融配合する。ポリマー組成物を混合ボールから取り出し、厚さが0.25インチであるスラブに圧縮成形する。圧縮成形を、300psi〜500psiの圧力及び140℃の温度を3分間使用して達成し、その後、圧力を、サンプルを140℃でさらに3分間維持しながら2000psi超に増大する。その後、この高い圧力を、サンプルが冷える間、維持する。
比較サンプルAの一連の18個の試料片が2−パラメーターのワイブル破損分布に対して近似される。データは、不良な相関(0.75のr∧2)をもたらす著しい非線形性を示す。3−パラメーターのワイブル破損分布が、破損分布を記述するためにより良好に合うことが見出され(0.88のr∧2)、この場合、オフセットt0=8.8kVである。11.7kVの3−パラメーター・ワイブル特性電圧が、図2に示されるように、比較サンプルAについて求められ、この場合、90%信頼区間が10.7kVから13.7kVにまで及ぶ。
ミックス温度に対する性能の何らかの影響を明らかにするための手段として、比較サンプルBは、上昇したミックス温度(比較サンプルAにおいて使用される140℃と比較して、225℃)により調製される11個の試料片の評価を含む。図2に示されるように、3−パラメーターのワイブル分布(r∧2=0.77)は、t0=8.5kVのオフセットとともに10.2kVの特性電圧(9.6kV〜11.4kVの90%信頼区間)をもたらす。この特性電圧は、上昇したミックス温度によってわずかに低下しているようであるが、差は統計学的に有意でない。しかしながら、このことは、比較サンプルAにより、特性電圧に対する潜在的改善を求めるための控え目なベースラインが、140℃〜225℃の間の温度で配合されたどの材料についても表されることをまさに示唆する。
比較サンプルCは、225℃のミックス温度を使用して調製されている、2wt%のアントラセンを含有するLDPEである。8個の試料片を評価して、16.3kVの特性電圧(15.3kVから17.2kVにまで及ぶ90%信頼区間)を明らかにした。この特性電圧は比較例A及び比較例Bの特性電圧を十分に超えている。アントラセンは公知の電圧安定化剤であるので、この性能は予想と一致している。
実施例1の一連の7個の試料片が評価される。それにもかかわらず、7個中4個の試料片が、18kVの最大印加電圧を終える全試験プログラムに耐えた(LDPEサンプルはどれもが、18kVを終える全プログラムに耐えられなかった)。類似する3−パラメーター・ワイブル分布に対して近似されるとき(3つの破損は、言うまでもなく、完全な一致を達成する)、ほぼ47kVの特性電圧が推定される。より妥当な2−パラメーターモデル(r∧2=0.94)を使用する場合、実施例1についての特性電圧が23.9kV(16.4kV〜51.3kVの90%信頼区間)であることが推定される。
実施例2は、190℃のミックス温度により調製される、(2wt%のアントラセンとモル等価な)2.2wt%のベンズアニリド(Sigma Aldrichから入手可能)を含有するLDPEである。8個の試料片が評価される。3つが18kVの最大電圧段階に耐えた。3−パラメーター・ワイブル分布(r∧2=0.92)は29kVの特性電圧及びt0=9.8kVのオフセットをもたらし、この場合、90%信頼区間が13.5kVから77kVにまで及ぶ。
Claims (4)
- 前記ポリオレフィン組成物のポリオレフィンがポリエチレンである、請求項1に記載の被覆された導体。
- 前記ポリオレフィン組成物の0.1wt%〜3wt%が前記ベンズアニリドで構成される請求項1または2に記載の被覆された導体。
- 前記被覆物が絶縁層である、請求項1に記載の被覆された導体。
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EP3261093B1 (en) | 2016-06-21 | 2023-08-02 | Borealis AG | Cable with advantageous electrical properties |
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KR20240041976A (ko) | 2021-08-04 | 2024-04-01 | 다우 글로벌 테크놀로지스 엘엘씨 | 전압 안정화제 화합물의 조합을 함유하는 폴리올레핀 제형 |
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MX2013003503A (es) | 2013-05-20 |
CN104212022A (zh) | 2014-12-17 |
MX351940B (es) | 2017-11-03 |
CA3034833A1 (en) | 2012-04-05 |
US10163545B2 (en) | 2018-12-25 |
EP3133113A1 (en) | 2017-02-22 |
CN103221470A (zh) | 2013-07-24 |
CA2812552C (en) | 2019-05-07 |
US10622117B2 (en) | 2020-04-14 |
KR101856268B1 (ko) | 2018-05-09 |
JP2013544907A (ja) | 2013-12-19 |
CN104212022B (zh) | 2016-06-29 |
MX362749B (es) | 2019-02-07 |
US20180218806A1 (en) | 2018-08-02 |
US20160276061A1 (en) | 2016-09-22 |
JP5793571B2 (ja) | 2015-10-14 |
WO2012044521A1 (en) | 2012-04-05 |
JP2016047916A (ja) | 2016-04-07 |
KR20130139891A (ko) | 2013-12-23 |
CA2812552A1 (en) | 2012-04-05 |
TW201224030A (en) | 2012-06-16 |
CN103221470B (zh) | 2014-09-03 |
EP2622009A1 (en) | 2013-08-07 |
EP2622009B1 (en) | 2016-11-02 |
US20130186670A1 (en) | 2013-07-25 |
TWI507461B (zh) | 2015-11-11 |
CA3034833C (en) | 2020-10-27 |
EP3133113B1 (en) | 2018-10-31 |
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