CN1575319A - 绝缘泡沫组合物 - Google Patents
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Abstract
本发明涉及用于通信电缆的绝缘泡沫组合物,该组合物具有加工性能,电性能和机械性能的改进平衡。
Description
本发明涉及用于通信电缆的绝缘泡沫组合物,该组合物具有加工性能,电性能和机械性能的改进平衡。
背景技术
聚烯烃化合物对于电缆绝缘体的用途是公知的。对于数据电缆应用,必须的要求是达到规定的电缆阻抗。将绝缘体发泡会降低介电常数和(为达到要求的阻抗)绝缘体直径。结果是更小的电缆,得到更高的安装电缆密度或对于给定的负载,在着火情况下降低的总热量释放。
传统上,发泡MDPE或HDPE已经用于电话电缆应用,但这些产品太软和可能容易在电缆组装期间变形。聚丙烯较硬但比较难以加工。问题在于线性聚合物如聚丙烯固有地具有差的熔体强度和难以获得稳定密闭的泡孔结构加上低泡沫密度。高分子量(MW)聚丙烯具有更大的熔体强度但是粘性的。这引起高挤出熔体温度和发泡剂的不受控制反应与获得的差泡孔结构。低MW聚丙烯得到更好的挤出性,但熔体强度的缺乏导致差的泡沫泡孔结构。理想的聚合物应当结合这些性能,即具有良好的熔体强度和加工性能。
介电性能.对于高性能数据电缆的需求发展变得更为迫切。更大的带宽总是要求更高的操作频率,但采用这些更高的频率,关键性能参数如特征阻抗和串音更为难以满足。采用更高的频率,绝缘体的介电性能变得显著但认识到几何一致性保持关键的性能参数。
其中G=常数,∈=电容率,s=导体轴间隔和d=导体直径
特征阻抗是介电常数和电缆几何尺寸的函数。因此对于给定的阻抗(正常地对于结构化数据电缆为100Ohm)和导体尺寸,固定绝缘体直径。由于许多原因需要更小的电缆和可以看出达到此降低的唯一途径是绝缘体介电常数的相应降低。聚乙烯的介电常数是2.3和空气的介电常数是1.0。直接依赖于获得的绝缘体密度,聚合物和空气的混合物会达到在这些极限之间的数值。对于更大的电缆,这可以由空气间隔的构造(如盘或车轮设计)达到,但对于小的数据电缆唯一的解决方案是发泡。
几何学.看出一致的阻抗是一致介电常数(如泡沫密度)和导体直径间隔的函数。几何一致泡沫的达到不是容易的。导体直径也是已知的关键因素和多年来投入相当的努力以改进导线直径一致性。然而对于泡沫电缆不是特别实际的(比较固体电介质)和因此要进一步解决。
数据电缆从双绞线组装和故此导体间隔与绝缘体直径总体相联。基本需要因此是挤出绝缘体的一致直径。令人遗憾地,挤出仅是问题的开始。电缆的组装包括将绝缘导体通过机器和这可引起磨损或变形。由于背向张力极大地影响严密度和因此导体的间隔,绞合工艺是特别精密的。在随后的加护套和安装期间的过度张力同等地影响导体间隔。实际上我们处理破碎现象。影响破碎性能的关键参数是拉伸强度和硬度,显然它们必须最大化以达到最优的结果。
材料.对于主要的聚烯烃产品,显示典型的拉伸强度和Shore硬度数值(表1)。清楚的是在拉伸性能和Shore硬度方面,聚丙烯(PP)有对于应用有兴趣的性能。此外,介电常数直接与密度相关和为达到给定的比重量,PP需要较小的膨胀。
表1.电缆绝缘体聚烯烃的特征物理性能
材料 | 拉伸 | 伸长率 | Shore D | 密度 | 熔体温度 |
LDPE | 17 | 450 | 45 | 920 | 110 |
MDPE | 23 | 500 | 53 | 930 | 125 |
LLDPE | 23 | 600 | 48 | 922 | 125 |
HDPE | 27 | 600 | 60 | 950 | 130 |
PP | 36 | 700 | 65 | 910 | 165 |
在以上列出的材料中,PP显然最难以加工。
聚丙烯的发泡:
聚烯烃泡沫的挤出数十年来是已知的:迄今为止,仅可以从低密度聚乙烯制备非交联泡沫。传统上,发泡PE已经用于电话电缆应用,但这些产品太软和可能容易在电缆组装期间变形。聚丙烯具有较大的刚性和形状保持,但较难以加工,这是由于它具有弱的熔体强度和熔体弹性。问题在于线性聚合物如聚丙烯固有地具有差熔体强度和熔体拉伸性,它们仅允许伴随低泡沫密度的低泡孔生长。否则的话,发生泡沫倒塌和聚结,它们导致非常差,不均匀的泡沫结构与低机械强度。
进一步的问题是工艺选择。在典型的挤出泡沫工艺中,熔融聚合物,将确定量的发泡剂加入和与聚合物混合。由于在高温下在挤出机筒中诱导的对流扩散,注入的气体在聚合物基体中以高速率扩散。当离开模头时,聚合物/发泡剂溶液进行解压。这引起聚合物中发泡剂溶解度的下降,它导致气泡形成或发泡。可以由溶解气体的分离、挥发性液体的蒸发、或气体从化学反应的释放产生气体相。不管发泡剂的类型,膨胀工艺包括三个主要步骤:成核,气泡生长,和稳定。可膨胀气泡的成核或形成在聚合物熔体中开始,该聚合物熔体已被发泡剂过饱和。一旦气泡达到临界尺寸,由于发泡剂快速扩散入气泡中,它持续生长。此生长持续直到气泡稳定或破裂。
现在化学发泡绝缘体共同具有的指示是物理发泡最终取得进展。对于化学品,通过使用常规挤出生产线,发泡用于达到下至约0.4g/cm3的密度水平。发泡剂配制剂的分解温度必须满足PP的熔体温度。依赖于发泡剂的类型,留下分解产物,它可影响绝缘层的电行为。作为发泡剂的气体(CO2、N2、烃、…)的使用是替代工艺,它要求涉及气体注入的特殊设备,挤出机熔融和冷却和模头设计。但此技术使得可以达到下至0.05g/cm3的泡沫密度。
聚丙烯在USA作为固体电话导线绝缘体看到一些成功。这些产品的多孔版在20世纪80年代引入,但使用限于要求高温性能的特殊应用。在数据电缆应用中使用这些产品的尝试一般失败于工艺难度。我们了解一种情况,其中通过物理共混等比例的多孔PP和多孔MDPE达到有限的成功,但这样的操作决不是商业所需的。
固体聚烯烃绝缘的100Ohm数据电缆(MDPE)正常在0.52mm(24awg)铜导体上具有0.95mm的绝缘体直径。同等发泡电缆的直径直接与膨胀程度相关联。在咨询许多电缆生产商之后,确定+/-40%(泡沫密度0.59)膨胀和直径0.85mm的电缆。这相应于1.6的绝缘体介电常数。相应的电容目标是208pF/m。
发明目的
因此本发明的目的是提供一种用于绝缘通信电缆的绝缘泡沫组合物,该组合物具有加工性能和电性能和机械性能的改进平衡,包括20-95wt%未改性的丙烯聚合物A和5-80wt%丙烯聚合物B。
术语加工性能用于定义电缆涂敷工艺的稳定性。
由一种泡沫组合物达到此目的,其中丙烯聚合物B包括在230℃/2.16kg下熔融指数为0.05-20g/10min的改性丙烯聚合物,该改性丙烯聚合物具有应变硬化行为,因此在与在230℃/2.16kg下熔融指数为0.1-10g/10min的未改性丙烯聚合物的混合物中,改性丙烯聚合物以至多100wt%,优选20-100wt%和最优选50-100wt%在丙烯聚合物B中存在。
改性丙烯聚合物可以由任何数目的工艺,如通过采用热分解自由基形成剂处理未改性的丙烯聚合物和/或采用电离辐射的处理生产,其中两种处理可以非必要地伴随或跟随着采用如下物质的处理:二或多官能不饱和单体,如丁二烯、异戊二烯、二甲基丁二烯或二乙烯基苯。进一步的工艺可适用于改性丙烯聚合物的生产,条件是获得的改性丙烯聚合物满足应变硬化行为的特性,其定义如下。
该改性丙烯聚合物A的例子特别是:
·在熔体中由聚丙烯与双马来酰亚氨基化合物的反应而改性的聚丙烯(EP0574801A1、EP0574804A2),
·在固相中由采用电离辐射处理聚丙烯而改性的聚丙烯(EP0190889A2、EP0634454A1),
·在固相中(EP0384431A2)或在熔体中(EP0142724A2)由采用电离辐射处理聚丙烯而改性的聚丙烯,
·电离辐射作用下由采用多官能、烯属不饱和单体处理聚丙烯而改性的聚丙烯(EP0678527A2),
·在过氧化物存在下在熔体中,由采用多官能、烯属不饱和单体的处理聚丙烯而改性的聚丙烯(EP0688817A1、EP0450342A2)。
应变硬化行为在此根据图1和图2定义。
图1显示试验程序的简要表示,该试验程序用于测量应变硬化。
聚合物的应变硬化行为由Reotens设备1(Goetfert,Siemensstr.2,74711 Buchen,德国的产品)分析,其中采用确定的加速度向下牵伸而将熔体条2伸长。记录依赖于牵伸速度v的引出力F。
在控制室温T=23℃的标准气侯化室中进行测试程序。将Rheotens设备1与挤出机/熔体泵3结合用于熔体条2的连续给料。挤出温度是200℃,使用直径2mm和长度6mm的毛细管模头,熔体条2牵伸的加速度是120mm/s2。
图1中的示意图以例示方式显示引出力F(即“熔体强度”)的增加对牵伸速度v(即“拉伸性”)的增加。
图2显示具有或不具有应变硬化行为的聚合物样品Rheotens测量的记录曲线。在条破坏时的最大点(Fmax;vmax)是熔体强度和拉伸性的特征。
在230℃/2.16kg下熔融指数为0.3、2.0和3.0g/10min的标准丙烯聚合物4、5、6显示非常低的熔体强度和低拉伸性。它们不具有应变硬化。
改性丙烯聚合物7(在230℃/2.16kg下图形中的样品熔融指数是2-3g/10min)或LDPE 8(在230℃/2.16kg下图形中的样品熔融指数是0.7g/10min)显示完全不同的熔体强度对拉伸性行为。与标准丙烯聚合物4、5、6相比,随着增加牵伸速度v,引出力F增加到较为更高的水平。此曲线形状是应变硬化的特征。尽管聚合物4和5显示大于5cN的引出力Fmax,由于它们的牵伸速度vmax不大于150mm/s,它们不具有应变硬化行为。
在此使用的“具有应变硬化行为的改性丙烯聚合物”具有引出力Fmax>5cN的增强强度和牵伸速度vmax>150mm/s的增强拉伸性。
在此使用的未改性丙烯聚合物包括丙烯均聚物、丙烯和乙烯和/或含有4-18个碳原子的α-烯烃的共聚物及上述聚合物的混合物。
以上使用的术语共聚物特别表示无规丙烯共聚物、丙烯嵌段共聚物、无规丙烯嵌段共聚物和弹性体聚丙烯,但不限于这些类型的共聚物。
通过向绝缘泡沫组合物中引入一定数量具有应变硬化行为的丙烯聚合物,可以最终达到具有均匀的泡沫泡孔结构和也具有对绝缘体要求的泡沫密度的电缆或导线产品。加工性能也是令人满意的和导线表面平滑。可以的情况是泡沫密度可以与没有高熔体强度PP的配制剂相同,但泡沫的均匀性和质量更好。
可以采用包含5-80wt%,优选10-50wt%丙烯聚合物B的泡沫组合物,达到以上的性能改进。
采用根据本发明的组合物,获得0.4-0.8,优选0.5-0.6的泡沫密度。
优选由如下方式制备改性丙烯聚合物:
a)混合粒状未改性丙烯聚合物,该未改性丙烯聚合物包括
a1)丙烯均聚物,特别地重均分子量Mw为500,000-1,500,000g/mol的丙烯均聚物,和/或
a2)丙烯和乙烯和/或含有4-18个碳原子的α-烯烃的共聚物,或这样共聚物的混合物,
与0.05-3wt%作为能够热分解的自由基产生剂的酰基过氧化物、烷基过氧化物、氢过氧化物、过酸酯和/或过氧碳酸酯,基于使用的聚烯烃组合物,如果需要则将该自由基产生剂用惰性溶剂稀释,同时加热到30-100℃,优选60-90℃,
b)在20-120℃,优选60-100℃的温度T(℃)下由粒状丙烯聚合物吸附双官能不饱和单体,其中吸收的双官能不饱和单体的量为0.01-10wt%,优选0.05-2wt%,基于使用的丙烯聚合物,和然后
c)从吸附温度到210℃,在包括惰性气体和/或挥发性双官能单体的气氛中加热和熔融粒状聚烯烃组合物,因此能够热分解的自由基产生剂分解和然后
d)加热熔体直到280℃以除去未反应的单体和分解产物,
e)以自身已知的方式附聚熔体。
可以在方法的步骤a)和/或e)之前和/或在上述方法的步骤c)和/或d)之前或期间,加入通常数量的辅助物质,该辅助物质可以是0.01-1.5wt%稳定剂,0.01-1wt%加工助剂,0.1-1wt%抗静电剂,0.2-3wt%颜料和至多3wt%的α-成核剂,在每种情况下基于丙烯聚合物的总和。
粒状未改性丙烯聚合物的形状可以为粉末、颗粒或晶粒度为0.001mm-7mm的粗砂状料。
生产改性丙烯聚合物的方法优选是连续方法,在连续反应器、混合机、捏合机和挤出机中进行。然而改性丙烯聚合物的间歇生产也是可行的。
优选挥发性双官能单体由粒状丙烯聚合物从气相吸收。
挥发性双官能单体的实际吸附时间τ为10-1000s,其中优选是60-600s的吸附时间τ。
用于生产改性丙烯聚合物的方法中的双官能不饱和单体优选是C4-C10二烯烃和/或C7-C10二乙烯基化合物。特别优选是丁二烯、异戊二烯、二甲基丁二烯或二乙烯基苯。
根据本发明的进一步实施方案和除以上定义的之外,未改性丙烯聚合物A选自如下物质的任何一种或混合物:
a)常规聚丙烯聚合物,优选丙烯均聚物和/或丙烯,乙烯和/或含有4-18个碳原子的α-烯烃的共聚物,这些聚合物可以使用齐格勒纳塔催化剂或金属茂催化剂获得,丙烯含量为80.0-99.9wt%,形式为无规共聚物、嵌段共聚物和/或无规嵌段共聚物,这些共聚物的熔融指数在230℃/2.16kg下为0.1-40g/10min和优选在230℃/2.16kg下为1-8g/10min、
b)Mw/Mn比例为2-6和在230℃/2.16kg下熔融指数为0.1-40g/10min的聚烯烃混合物,该混合物包括
b1)60-98wt%如下物质的结晶共聚物:85-99.5wt%丙烯和15-0.5wt%乙烯和/或通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基,和
b2)2-40wt%如下物质的弹性共聚物:20-70wt%乙烯和80-30wt%丙烯和/或通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基、
c)在230℃/2.16kg下熔融指数为0.1-100g/10min的基本无定形,非全同立构丙烯聚合物,该基本无定形丙烯聚合物包括丙烯均聚物和/或包括如下物质的丙烯共聚物:至少85wt%丙烯和不大于15wt%一种或多种通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基。
本发明的组合物可包括一定数量,如至多约10wt%的矿物质填料。这样的矿物质填料的优选例子是层状硅酸盐。通过将聚合物成核,矿物质填料可用于在泡沫中得到更好的泡孔稳定性,导致更快的结晶。层状硅酸盐提供另外的其它益处,如增加的机械强度和改进的热性能,如改进的热变形温度。
根据进一步的实施方案,本发明的绝缘组合物可用于生产绝缘通信电缆,特别是数据电缆和绞合线。
根据本发明的仍然进一步实施方案,提供一种数据电缆单线,该单线包括由绝缘体围绕的导体,其中绝缘体包括上述组合物。
根据本发明的仍然进一步实施方案,提供一种远程通信电缆,该远程通信电缆包括多个数据电缆单线,每个单线包括由绝缘体围绕的导体,该多个数据电缆单线依次由护套围绕,其中数据电缆单线的绝缘体包括上述组合物。
实施例
改性丙烯聚合物B的合成
将在230℃/2.16kg下熔融指数为0.25g/10min和平均粒度为0.45mm的粉状聚丙烯均聚物连续计量入连续混合机。此外,将基于丙烯均聚物、作为热分解自由基形成剂的0.45wt%过氧苯甲酸叔丁酯计量入混合机。在50℃下均匀混合的同时,在7分钟停留时间期间在50℃下,通过含有0.135wt%丁二烯的丁二烯和氮气的混合物吸收性地加入包含过氧苯甲酸叔丁酯的丙烯均聚物,基于聚丙烯均聚物。在转移到双螺杆挤出机之后,将粉状反应混合物,与已和它一起加入的丁二烯和氮气的混合物接触,在230℃的本体温度下熔融,和在粗脱气之后,在由作为夹带剂的水的同时加入进行细脱气,向熔体中加入如下物质的混合物:0.1wt%四-(亚甲基-(3,5-二-叔丁基羟基肉桂酸酯)-甲烷,0.1wt%三-(2,4-二-叔丁基苯基)-亚磷酸酯,0.1wt%四-3-(3,5-二-叔丁基-4-羟苯基)-丙酸季戊四醇酯和0.1wt%硬酯酸钙。在添加剂分布之后,将熔体排出和成粒。
获得的改性丙烯聚合物B显示应变硬化行为,该应变硬化行为的特征为在条破坏时测量的Rheotens数值为Fmax=30.5cN和vmax=210mm/s,和熔融指数在230℃/2.16kg为2.3/10min。
将改性丙烯聚合物B和各自数量的未改性丙烯聚合物A和各自数量的发泡剂(偶氮二甲酰胺)的混合物在温度设定为180℃的BUSS共捏合机PR43/11 L/D中混炼,均化,排出和造粒。
将这些粒料加入到单螺杆挤出机(30/20D)中,其中熔融它们。典型地采用相对平坦的温度分布(Z1-180C到Z5-190C)。将0.52mm铜导体加入到挤出机中和由熔体涂敷。在离开模头之后,绝缘体发泡和随后在冷却槽(水浴)中冷却。
相似地制备对比例,然而不使用改性丙烯聚合物B。
测量方法
MFR
根据ASTM D 1238-D测量聚丙烯的MFR。
电容
使用标准Zumbach CDR工艺控制系统在线测量电容。
表面性能
使用4等级标度(差-中等-良好-非常好)由目测检验检查表面性能。
Shore硬度
根据DIN 53456测量Shore硬度(Shore D 15sec)。
密度
根据ISO 845(表观公称密度的测量)进行泡沫密度测量。
结果
对比(样品1) | 本发明(样品2) | 对比(样品3) | 本发明(样品4) | |
BC245MO[wt%] | 96 | 84 | ||
BC310MO[wt%] | 85 | 81 | ||
BA110CF[wt%] | 10 | |||
发泡剂[wt%] | 1.5 | 1.3 | 1.3 | 1.3 |
丙烯聚合物B(Daploy)[wt%] | 15 | 12 | ||
MFR[g/10min] | 3.1 | 2.7 | 1.8 | 1.6 |
Shore D 15sec | 65 | 65 | 65 | 66 |
挤出温度(Z4) | 185 | 192 | 186 | 198 |
模头压力,Mpar | 308 | 223 | 550 | 354 |
导线直径,mm | 0.86 | 0.85 | 0.88 | 0.87 |
电容pF/m | 201 | 208.5 | 186 | 198 |
表面 | 中等 | 很好 | 差 | 好 |
线速度,m/min | 530 | 500 | 900 | 670 |
模头-槽距离,mm | 50 | 300 | 50 | 300 |
泡沫密度 | 0.58 | 0.59 | 0.54 | 0.59 |
发泡剂的数量是基于丙烯组合物的总重量。
样品1是含有高MW组分BA110CF的市售PP复合料,该复合料预计用于改进泡孔结构。与样品2(包含Daploy代替BA110CF)相比,可以看到与改进表面结合的显著更低模头压力。在更低MFR例子(样品3&4)的情况下,我们看到Daploy得到MFR的轻微降低与模头压力的更为显著降低和改进的表面。关键的差异是冷却槽的位置,对于参考产品(1&3),该冷却槽需要靠近模头以尝试停止膨胀。不管此情况如何,电缆仍过度膨胀。在样品2和4的情况下,冷却槽的位置不太关键和膨胀更好控制。
使用的所有未改性聚丙烯A(BC245MO、BD310MO、BA110CF)是购自Borealis GmbH的商业牌号。
使用的聚丙烯聚合物B(Daploy)也是购自Borealis GmbH的商业牌号。
Claims (6)
1.一种用于通信电缆的绝缘泡沫组合物,该组合物具有加工性能,电性能和机械性能的改进平衡,包括20-95wt%未改性的丙烯聚合物A和5-80wt%丙烯聚合物B,
其特征在于丙烯聚合物B包括在230℃/2.16kg下熔融指数为0.05-10g/10min的改性丙烯聚合物,该改性丙烯聚合物具有应变硬化行为,因此在与在230℃/2.16kg下熔融指数为0.1-10g/10min的未改性丙烯聚合物的混合物中,改性丙烯聚合物以至多100wt%,优选20-100wt%和最优选50-100wt%在丙烯聚合物B存在。
2.根据权利要求1的绝缘泡沫组合物,其特征在于由如下方式制备改性丙烯聚合物B:
a)混合粒状未改性丙烯聚合物,该未改性丙烯聚合物包括
a1)丙烯均聚物,特别地重均分子量Mw为500,000-1,500,000g/mol的丙烯均聚物,和/或
a2)丙烯和乙烯和/或含有4-18个碳原子的α-烯烃的共聚物,或这样共聚物的混合物,
与0.05-3wt%作为能够热分解的自由基产生剂的酰基过氧化物、烷基过氧化物、氢过氧化物、过酸酯和/或过氧碳酸酯,基于使用的聚烯烃组合物,如需要将该自由基产生剂用惰性溶剂稀释,及加热到30-100℃,优选60-90℃,
b)在20-120℃,优选60-100℃的温度T(℃)下由粒状丙烯聚合物吸附双官能不饱和单体,其中吸收的双官能不饱和单体的量为0.01-10wt%,优选0.05-2wt%,基于使用的丙烯聚合物,和然后
c)从吸附温度到210℃,在包括惰性气体和/或挥发性双官能单体的气氛中加热和熔融粒状聚烯烃组合物,从而能够热分解的自由基产生剂分解和然后
d)加热熔体直到280℃以除去未反应的单体和分解产物,
d)以自身已知的方式附聚熔体。
3.根据权利要求1的绝缘泡沫组合物,其特征在于未改性丙烯聚合物A选自如下物质的任何一种或混合物
a)常规聚丙烯聚合物,优选丙烯均聚物和/或丙烯,乙烯和/或含有4-18个碳原子的α-烯烃的共聚物,这些聚合物可以使用齐格勒纳塔催化剂或金属茂催化剂获得,丙烯含量为80.0-99.9wt%,形式为无规共聚物、嵌段共聚物和/或无规嵌段共聚物,这些共聚物的熔融指数在230℃/2.16kg下为0.1-40g/10min和优选在230℃/2.16kg下为1-8g/10min、
b)Mw/Mn比例为2-6和在230℃/2.16kg下熔融指数为1-40g/10min的聚烯烃混合物,该混合物包括
b1)60-98wt%如下物质的结晶共聚物:85-99.5wt%丙烯和15-0.5wt%乙烯和/或通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基,和
b2)2-40wt%如下物质的弹性共聚物:20-70wt%乙烯和80-30wt%丙烯和/或通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基、
c)在230℃/2.16kg下熔融指数为0.1-100g/10min的基本无定形、非全同立构丙烯聚合物,该基本无定形丙烯聚合物包括丙烯均聚物和/或包含如下物质的丙烯共聚物:至少85wt%丙烯和不大于15wt%一种或多种通式CH2=CHR的α-烯烃,其中R是含有2-8个碳原子的线性或支化烷基。
4.根据权利要求1-3任意一项的绝缘组合物用于生产绝缘通信电缆,特别是数据电缆和绞合线的用途。
5.一种数据电缆单线,包括由绝缘体围绕的导体,其特征在于绝缘体包括根据权利要求1-3任意一项的组合物。
6.一种远程通信电缆,包括多个数据电缆单线,每个单线包括由绝缘体围绕的导体,该多个数据电缆单线依次由护套围绕,其特征在于数据电缆单线的绝缘体由根据权利要求1-3任意一项的组合物组成。
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EP01122981.2 | 2001-09-25 | ||
EP01122981A EP1295910A1 (en) | 2001-09-25 | 2001-09-25 | Insulating foam composition |
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US (2) | US20040242716A1 (zh) |
EP (2) | EP1295910A1 (zh) |
KR (1) | KR100854938B1 (zh) |
CN (1) | CN1296425C (zh) |
AT (1) | ATE414739T1 (zh) |
CA (1) | CA2461262A1 (zh) |
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CN101517659B (zh) * | 2006-09-25 | 2012-02-01 | 博里利斯技术有限公司 | 同轴电缆 |
CN102439668A (zh) * | 2009-07-07 | 2012-05-02 | 株式会社藤仓 | 发泡电线及包含该发泡电线的传输电缆 |
TWI417904B (zh) * | 2007-03-15 | 2013-12-01 | Union Carbide Chem Plastic | 具有降低的電樹(electrical treeing)之電纜及用於降低電樹的方法 |
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- 2001-09-25 EP EP01122981A patent/EP1295910A1/en not_active Withdrawn
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2002
- 2002-09-25 KR KR1020047004376A patent/KR100854938B1/ko not_active IP Right Cessation
- 2002-09-25 AT AT02774648T patent/ATE414739T1/de not_active IP Right Cessation
- 2002-09-25 US US10/490,675 patent/US20040242716A1/en not_active Abandoned
- 2002-09-25 CA CA002461262A patent/CA2461262A1/en not_active Abandoned
- 2002-09-25 DE DE60229970T patent/DE60229970D1/de not_active Expired - Lifetime
- 2002-09-25 HU HU0402147A patent/HUP0402147A3/hu unknown
- 2002-09-25 EP EP02774648A patent/EP1440119B1/en not_active Expired - Lifetime
- 2002-09-25 CN CNB02820879XA patent/CN1296425C/zh not_active Expired - Fee Related
- 2002-09-25 WO PCT/EP2002/010742 patent/WO2003029345A2/en not_active Application Discontinuation
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CN101517659B (zh) * | 2006-09-25 | 2012-02-01 | 博里利斯技术有限公司 | 同轴电缆 |
TWI417904B (zh) * | 2007-03-15 | 2013-12-01 | Union Carbide Chem Plastic | 具有降低的電樹(electrical treeing)之電纜及用於降低電樹的方法 |
CN102439668A (zh) * | 2009-07-07 | 2012-05-02 | 株式会社藤仓 | 发泡电线及包含该发泡电线的传输电缆 |
CN102439668B (zh) * | 2009-07-07 | 2013-03-27 | 株式会社藤仓 | 发泡电线及包含该发泡电线的传输电缆 |
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US20080255261A1 (en) | 2008-10-16 |
KR100854938B1 (ko) | 2008-08-29 |
CA2461262A1 (en) | 2003-04-10 |
HUP0402147A3 (en) | 2005-11-28 |
HUP0402147A2 (hu) | 2005-01-28 |
KR20040047857A (ko) | 2004-06-05 |
WO2003029345A8 (en) | 2004-03-25 |
US20040242716A1 (en) | 2004-12-02 |
ATE414739T1 (de) | 2008-12-15 |
WO2003029345A2 (en) | 2003-04-10 |
EP1440119B1 (en) | 2008-11-19 |
CN1296425C (zh) | 2007-01-24 |
WO2003029345A3 (en) | 2004-02-19 |
EP1295910A1 (en) | 2003-03-26 |
EP1440119A2 (en) | 2004-07-28 |
DE60229970D1 (de) | 2009-01-02 |
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