公开(公告)号：US06441096B1

公开(公告)日：2002-08-27

申请号：US09832227

申请日：2001-04-10

申请人： Mats Bäckman ,  Eeva-Leena Heino ,  Solveig Johansson ,  Jussi Laurell ,  Arja Lehtinen ,  Jarmo Lindroos ,  Marja Ora ,  Elisabeth Ribarits ,  Teija Sihvonen ,  Jari {umlaut over (Aa)}rilä

发明人： Mats Bäckman ,  Eeva-Leena Heino ,  Solveig Johansson ,  Jussi Laurell ,  Arja Lehtinen ,  Jarmo Lindroos ,  Marja Ora ,  Elisabeth Ribarits ,  Teija Sihvonen ,  Jari {umlaut over (Aa)}rilä

IPC分类号： C08L2300

CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08L23/06 ,  C08L23/0815 ,  Y10S138/07 ,  C08F2/001 ,  C08L2666/04 ,  C08F2500/02 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/17 ,  C08F2500/13 ,  C08F210/14 ,  C08F2500/01 ,  C08F210/08

摘要： A multimodal polymer composition for pipes is disclosed as well as a pipes made thereof. The polymer is a multimodal polyethylene with a density of 0.930-0.965 g/cm3, and a viscosity at a shear stress of 747 Pa (&eegr;747 Pa) of at least 650 Pa.s, said multimodal polyethylene comprising a low molecular weight (LMW) ethylene homopolymer fraction and a high molecular weight (HMW) ethylene copolymer fraction, said HMW fraction having a weight ratio of the LMW fraction to the HMW fraction of (35-55):(65-45). Preferably, the multimodal polyethylene has a viscosity at a shear stress of 2.7 kPa (&eegr;2.7 kPa) of 260-450 kPa.s; and a shear thinning index (SHI) defined as the ratio of the viscosities at shear stresses of 2.7 and 210 kPa, respectively, of SHI27/210=50-150, and a storage modulus (G′) at a loss modulus (G″) of 5 kPa, of G′5 kPa≧3000 Pa. The pipe is made of the multimodal polymer composition and withstands a stress of 8.0 MPa gauge during 50 years at 20° C. (MRS8.0). Preferably, the pipe has a rapid crack propagation (RCP) S4-value, determined according to ISO 13477:1997(E), of −5° C. or lower and a slow crack propagation resistance, determined according to ISO 13479:1997, of at least 500 hrs at 4.6 MPa/80° C. The polymer composition affords good non-sagging properties to pipe made thereof.

摘要翻译： 公开了一种用于管道的多峰聚合物组合物以及由其制成的管。 聚合物是密度为0.930-0.965g / cm 3的多峰聚乙烯，剪切应力为747Pa（eta747Pa）下的粘度为至少650Pa.s，所述多峰聚乙烯包含低分子量（LMW） 乙烯均聚物部分和高分子量（HMW）乙烯共聚物部分，所述HMW部分具有LMW部分与HMW部分的重量比（35-55）：（65-45）。 优选地，多峰聚乙烯在剪切应力为2.7kPa（eta2.7kPa）下的粘度为260-450kPa·s; 和剪切稀化指数（SHI），其分别定义为SHI27 / 210 = 50-150的剪切应力分别为2.7和210kPa的粘度比，以及损耗模量（G'）下的储能模量（G'）， '）为5kPa，G'5kPa> = 3000Pa。该管由多峰聚合物组合物制成，并且在20℃下在50年内耐受8.0MPa表压的应力（MRS8.0）。 优选地，管具有根据ISO 13477：1997（E）确定的-5℃或更低的快速裂纹扩展（RCP）S4值，并且根据ISO 13479：1997确定的缓慢的抗裂纹扩展性， 在4.6MPa / 80℃下至少500小时。聚合物组合物为其制成的管制得到良好的不下垂性能。

公开(公告)号：US06329054B1

公开(公告)日：2001-12-11

申请号：US08983273

申请日：1998-05-15

申请人： Laila Rogestedt ,  Hans-Bertil Martinsson ,  Markku Asumalahti ,  Jari {umlaut over (Aa)}rilä

发明人： Laila Rogestedt ,  Hans-Bertil Martinsson ,  Markku Asumalahti ,  Jari {umlaut over (Aa)}rilä

IPC分类号： C08L2304

CPC分类号： H01B3/44 ,  C08F210/16 ,  C08L23/04 ,  C08L23/0815 ,  C08L2205/02 ,  G02B6/443 ,  Y10T428/2933 ,  Y10T428/2938 ,  Y10T428/294 ,  Y10T428/2947 ,  C08F2/001 ,  C08L2666/04 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/05 ,  C08F2500/13 ,  C08F2500/07

摘要： A cable-sheating composition and its use as outer sheath for a power cable or a communication cable are disclosed. The cable-sheating composition is a multimodal, preferably bimodal, mixture of olefin polymers, preferable ethylene plastics, having a density of about 0.915-0.955 g/cm3 and a melt flow rate of about 0.1-0.3 g/10 min, said olefin polymer mixture comprising at least a first and a second olefin polymer, of which the first has a density and a melt flow rate selected from (a) about 0.930-0.975 g/cm3 and about 50-2000 g/10 min and (b) about 0.88-0.93 g/cm3 and about 0.1-0.8 g/10 min. Preferably, the olefin polymer mixture has been obtained by coordination-catalyzed polymerization of at least one &agr;-olefin in several stages, preferably two stages consisting of a loop reactor/a gas-phase reactor or a gas-phase reactor/a gas-phase reactor, through polymerization or copolymerization of ethylene in the first stage and copolymerization of ethylene with butene, 4-methyl-1-pentene, 1-hexene or 1-octene in the second stage.

摘要翻译： 公开了一种电缆护套组合物及其用作电力电缆或通信电缆的外护套的用途。 电缆护套组合物是密度为约0.915-0.955g / cm 3，熔体流动速率为约0.1-0.3g / 10min的烯烃聚合物，优选的乙烯塑料的多峰，优选双峰混合物，所述烯烃聚合物 包含至少第一和第二烯烃聚合物的混合物，其中第一种烯烃聚合物的密度和熔体流动速率选自（a）约0.930-0.975g / cm 3和约50-2000g / 10min，（b）约 0.88-0.93g / cm 3和约0.1-0.8g / 10min。 优选地，烯烃聚合物混合物是通过在几个阶段中配位催化聚合至少一种α-烯烃获得的，优选由环流反应器/气相反应器或气相反应器/气相 反应器，在第二阶段通过乙烯的聚合或共聚合，乙烯与丁烯的共聚合，4-甲基-1-戊烯，1-己烯或1-辛烯的反应。