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1. 发明申请

WO2009123663A1 ISOTACTIC POLYPROPYLENE PRODUCED FROM SUPERCRITICAL POLYMERIZATION PROCESS 审中-公开
标题翻译：由超临界聚合工艺生产的异辛烯聚丙烯
公开(公告)号：WO2009123663A1
公开(公告)日：2009-10-08
申请号：PCT/US2008/080434
申请日：2008-10-20
申请人： EXXONMOBIL CHEMICAL PATENTS INC. , EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , MEHTA, Aspy, K. , VARMA-NAIR, Manika , KISS, Gabor , BRANT, Patrick , REYNOLDS, Robert, P. , CHU, John, W. , RUCKER, Steven, P. , JIANG, Peijun
发明人： MEHTA, Aspy, K. , VARMA-NAIR, Manika , KISS, Gabor , BRANT, Patrick , REYNOLDS, Robert, P. , CHU, John, W. , RUCKER, Steven, P. , JIANG, Peijun
IPC分类号： C08F110/06 , C08F2/06 , C08F4/6592
CPC分类号： C08F110/06 , C08F4/65908 , C08F4/65912 , C08F10/00 , C08F10/06 , Y02P20/544 , C08F4/65927 , C08F2/14 , C08F2/06 , C08F2500/17 , C08F2500/09 , C08F2500/12 , C08F2500/20 , C08F2500/03 , C08F2500/15
摘要： This invention relates to an isotactic propylene homopolymer having: more than 15 and less than 100 regio defects (sum of 2,1-erythro and 2,1-threo insertions and 3,1-isomerizations ) per 10,000 propylene units; an Mw of 35000 g/mol or more; a peak melting temperature of greater than 149 0C; anmmmm pentad fraction of 0.85 or more; a heat of fusion of 80 J/g or more; and a peak melting temperature minus peak crystallization temperature (Tmp-Tcp) of less than or equal to (0.907 times Tmp) minus 99.64 (Tmp-Tcp
摘要翻译：本发明涉及全同立构丙烯均聚物，其具有：每10,000个丙烯单元多于15个且小于100个区域缺陷（2,1-赤式和2,1-苏式插入和3,1-异构化的总和）; Mw为35000g / mol以上; 峰值熔融温度大于149℃; 0.85mm以上的五元组分数; 融合热量为80J / g以上; 并且峰值熔融温度减去峰值结晶温度（Tmp-Tcp）小于或等于（0.907倍Tmp）减去99.64（Tmp-Tcp <（0.907×Tmp）-99.64）），其在0℃下对0wt ％成核剂。

2. 发明申请

WO2009082468A1 POLYPROPYLENE ETHYLENE-PROPYLENE COPOLYMER BLENDS AND IN-LINE PROCESS TO PRODUCE THEM 审中-公开
标题翻译：聚丙烯乙烯 - 丙烯共聚物共混物和在线工艺生产
公开(公告)号：WO2009082468A1
公开(公告)日：2009-07-02
申请号：PCT/US2008/013862
申请日：2008-12-18
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , KISS, Gabor , BRANT, Patrick , REYNOLDS, Robert, P. , MEHTA, Aspy, K. , VARMA-NAIR, Manika , CHU, John, W. , RUCKER, Steven, P.
发明人： KISS, Gabor , BRANT, Patrick , REYNOLDS, Robert, P. , MEHTA, Aspy, K. , VARMA-NAIR, Manika , CHU, John, W. , RUCKER, Steven, P.
IPC分类号： C08L23/00 , C08L23/04
CPC分类号： C08L23/0815 , C08F110/06 , C08F210/06 , C08L23/10 , C08L2314/02 , C08L2314/06 , Y02P20/544 , C08L2666/06 , C08F2500/12 , C08F2500/20 , C08F2500/03 , C08F210/16
摘要： Ilsotactic polypropylene ethylene-propylene copolymer blends and in-lineprocesses for producing them. The in-line process for producing the blend includes providing two or more parallel reactor trains and a separator for product blending and product-feed separation; wherein the two or more reactor trains operate under fluid phase bulk homogeneous conditions and at least one of the trains operates under supercritical conditions.
摘要翻译：聚氨酯聚乙烯 - 丙烯共聚物共混物和用于生产它们的内衬工艺。用于生产混合物的在线方法包括提供两个或更多个平行的反应器列和用于产物共混和产物进料分离的分离器; 其中所述两个或多个反应器列车在流体相体积均匀条件下操作，并且所述列车中的至少一个在超临界条件下操作。

3. 发明申请

WO2012083104A1 A HEAT-SEAL RESIN AND PACKAGE FORMED THEREFROM 审中-公开
标题翻译：一种热密封树脂和其形成的包装
公开(公告)号：WO2012083104A1
公开(公告)日：2012-06-21
申请号：PCT/US2011/065332
申请日：2011-12-16
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , LOHSE, David, J. , SUN, Thomas, T. , MEHTA, Aspy, K. , KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , VARMA-NAIR, Manika
发明人： LOHSE, David, J. , SUN, Thomas, T. , MEHTA, Aspy, K. , KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , VARMA-NAIR, Manika
IPC分类号： C08L23/08 , C08L23/14 , C08L23/22
CPC分类号： C08L23/142 , C08L2205/025
摘要： Provided is a heat-seal resin. The resin includes 5 wt% to 95 wt% of a first copolymer and 95 wt% to 5 wt% of a second copolymer based on the total weight of the resin. The first copolymer and the second copolymer together are 90 wt% or more of the total weight of the resin. The first copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the first copolymer are different. The first copolymer has an MFR of from 5 to 1000 g/ 10 minutes and a T fm of 66°C to 80°C. The second copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the second copolymer are different. The second copolymer has an MFR of from 0.5 to 5 g/ 10 minutes and a T fm of 45°C to 66°C, wherein the first copolymer has an MFR of at least 2 g/10 minutes greater and a T fm of at least 10°C greater than the second copolymer. There is also a package formed partly or entirely of the resin.
摘要翻译：提供一种热封树脂。基于树脂的总重量，树脂包含5重量％至95重量％的第一共聚物和95重量％至5重量％的第二共聚物。第一共聚物和第二共聚物一起是树脂总重量的90重量％以上。第一共聚物包括2至4个碳原子的α-烯烃的第一单体和选自2至8个碳原子的α-烯烃的第二单体的第二单体。第一共聚物的第一单体和第二单体是不同的。第一共聚物的MFR为5〜1000g / 10分钟，Tfm为66〜80℃。第二共聚物包括2至4个碳原子的α-烯烃的第一单体和选自2至8个碳原子的α-烯烃的第二单体的第二单体。第二共聚物的第一单体和第二单体是不同的。第二共聚物的MFR为0.5-5g / 10分钟，Tfm为45℃至66℃，其中第一共聚物的MFR至少为2g / 10分钟，Tfm为至少10 °C比第二共聚物大。还有一部分或全部由树脂形成的包装。

4. 发明申请

WO2010053644A1 SUPER-SOLUTION HOMOGENEOUS PROPYLENE POLYMERIZATION AND POLYPROPYLENES MADE THEREFROM 审中-公开
标题翻译：超溶剂共聚丙烯聚合及其制备的聚丙烯
公开(公告)号：WO2010053644A1
公开(公告)日：2010-05-14
申请号：PCT/US2009/059318
申请日：2009-10-02
申请人： EXXONMOBIL CHEMICAL PATENTS INC. , MEHTA, Aspy, K. , VARMA-NAIR, Manika , KISS, Gabor , REYNOLDS, Robert, Patrick, Jr. , CHU, John, W. , RUCKER, Steven, P.
发明人： MEHTA, Aspy, K. , VARMA-NAIR, Manika , KISS, Gabor , REYNOLDS, Robert, Patrick, Jr. , CHU, John, W. , RUCKER, Steven, P.
IPC分类号： C08F10/06 , C08F4/643 , C08F2/06
CPC分类号： C08F110/06 , C08F4/65908 , C08F4/65912 , C08F10/00 , Y02P20/544 , C08F4/65927 , C08F2/06 , C08F2500/15 , C08F2500/20
摘要： This invention relates to processes for producing an isotactic propylene homopolymer having more than 15 and less than 100 regio defects (sum of 2,1-erythro and 2,1-threo insertions and 3,1-isomerizations ) per 10,000 propylene units; a weight-averaged molecular weight of 35000 g/mol or more; a peak melting temperature of greater than 149 0C; an mmmm pentad fraction of 0.85 or more; a heat of fusion of 80 J/g or more; and a peak melting temperature minus peak crystallization temperature (Tmp-Tcp) of less than or equal to (0.907 times Tmp) minus 99.64 (Tmp-Tcp
摘要翻译：本发明涉及用于生产具有超过15个且小于100个区域缺陷（每1万个丙烯单元的2,1-赤型和2,1-苏式插入和3,1-异构化的总和）的全同立构丙烯均聚物的方法; 重均分子量为35000g / mol以上; 峰值熔融温度大于149℃; 0.85mm以上的mmmm五元组分; 融合热量为80J / g以上; 并且峰值熔融温度减去峰值结晶温度（Tmp-Tcp）小于或等于（0.907倍Tmp）减去99.64（Tmp-Tcp <（0.907×Tmp）-99.64）），其在0℃下对0wt ％成核剂。

5. 发明申请

WO2009082465A1 BULK HOMOGENEOUS POLYMERIZATION PROCESS FOR ETHYLENE PROPYLENE COPOLYMERS 审中-公开
标题翻译：乙烯丙烯共聚物的均相聚合方法
公开(公告)号：WO2009082465A1
公开(公告)日：2009-07-02
申请号：PCT/US2008/013859
申请日：2008-12-18
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , RUCKER, Steven, P. , LATTNER, James, R.
发明人： KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , RUCKER, Steven, P. , LATTNER, James, R.
IPC分类号： C08F210/00
CPC分类号： C08F210/16 , C08F4/65908 , C08F4/65927 , C08F210/06 , Y10S526/902 , C08F2/02 , C08F2/14 , C08F2500/03 , C08F2500/12
摘要： Provided are bulk homogeneous polymerization processes for producing ethylene propylene random copolymers. The process includes contacting in a reactor or in a series of reactors propylene monomer, ethylene comonomer with one or more catalyst systems and optional solvent, wherein the reactor train is at a temperature of between 65'C and 180'C and at a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa, and wherein the polymerization system for the reactor train is in its dense fluid state to form a polymer reactor effluent including a homogeneous fluid phase polymer-monomer mixture in the reactor train, and wherein the resultant copolymer product comprises between 10 wt% and 20 wt% randomly distributed ethylene and the concentration of total region defects in the continuous propylene segments of the random EP copolymer is between 40 and 150%.
摘要翻译：提供用于生产乙烯丙烯无规共聚物的本体均相聚合方法。该方法包括使反应器或一系列反应器中的丙烯单体，乙烯共聚单体与一种或多种催化剂体系和任选的溶剂接触，其中反应器系在65℃至180℃之间，压力为低于聚合体系的浊点压力10MPa以下且小于1500MPa，并且其中反应器系列的聚合体系处于其致密流体状态，以形成包含均相流体相聚合物 - 单体混合物的聚合物反应器流出物并且其中所得共聚物产物包含10重量％至20重量％的随机分布的乙烯，并且随机EP共聚物的连续丙烯链段中总区域缺陷的浓度为40至150％。

6. 发明申请

WO2009035580A1 IN-LINE PROCESS FOR PRODUCING PLASTICIZED POLYMERS AND PLASTICIZED POLYMER BLENDS 审中-公开
标题翻译：生产聚合物和聚合物增稠剂的在线工艺
公开(公告)号：WO2009035580A1
公开(公告)日：2009-03-19
申请号：PCT/US2008/010517
申请日：2008-09-09
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , KISS, Gabor , CHU, John, W. , REYNOLDS, Robert, P., Jr. , GALUSKA, Alan, A. , DATTA, Sudhin , CHAPMAN, Bryan, R. , BRANT, Patrick
发明人： KISS, Gabor , CHU, John, W. , REYNOLDS, Robert, P., Jr. , GALUSKA, Alan, A. , DATTA, Sudhin , CHAPMAN, Bryan, R. , BRANT, Patrick
IPC分类号： C08F2/01
CPC分类号： C08F10/00 , B01J2219/00038 , B01J2219/0004 , C08F210/16 , C08J3/18 , C08F2/01 , C08F2/001 , C08F210/14 , C08F2500/12 , C08F2500/08 , C08F2500/20
摘要： A process for fluid phase in-line blending of plasticized polymers by providing two or more reactor trains configured in parallel and a separator, wherein one or more of the trains produces one or more polymers and another produces one or more plasticizers; contacting in at least one train olefin monomers, catalyst systems, optional comonomers, scavengers, diluents or solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous polymer mixture and plasticizer-monomer mixture in each train; passing the reactor effluents through the separator; maintaining the temperature and pressure within the separator to form a fluid-fluid two-phase system; and separating the phases. The polymer-rich blend phase is conveyed to a downstream finishing stage.
摘要翻译：一种通过提供两个或多个平行配置的反应器列和分离器的流化相在线共混塑化聚合物的方法，其中一个或多个列车产生一种或多种聚合物，另一种产生一种或多种增塑剂; 在高于聚合体系的固体 - 流体相转变温度的温度下，在至少一种烯烃单体，催化剂体系，任选的共聚单体，清除剂，稀释剂或溶剂的温度下接触至少低于10℃ 聚合体系小于1500MPa; 在每个列车中形成包含均匀聚合物混合物和增塑剂 - 单体混合物的反应器流出物; 使反应器流出物通过分离器; 保持分离器内的温度和压力以形成流体 - 流体两相系统; 并分离相。将富含聚合物的混合相输送到下游整理阶段。

7. 发明申请

WO2008076589A1 PHASE SEPARATOR AND MONOMER RECYCLE FOR SUPERCRITICAL POLYMERIZATION PROCESS 审中-公开
标题翻译：用于超临界聚合方法的相分离器和单体回收
公开(公告)号：WO2008076589A1
公开(公告)日：2008-06-26
申请号：PCT/US2007/085365
申请日：2007-11-21
申请人： EXXONMOBIL CHEMICAL PATENTS INC. , EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , FRIEDERSDORF, Chris , BRANT, Patrick , KISS, Gabor
发明人： FRIEDERSDORF, Chris , BRANT, Patrick , KISS, Gabor
IPC分类号： C08F10/06 , C08F2/06 , C08F4/62
CPC分类号： C08F10/06 , C08F4/65927 , C08F210/06 , Y02P20/544 , C08F2/06 , C08F2/14 , C08F210/14
摘要： This invention relates to a process for polymerizing olefins, comprising the steps of: (a) contacting in one or more reactors, in a dense fluid homogeneous polymerization system, olefin monomers having three or more carbon atoms present at 30 weight % or more (based upon the weight of the monomers and comonomers entering the reactor), with: 1) one or more catalyst compounds, 2) one or more activators, 3) from 0 to 50 mole % comonomer (based upon the amount of the monomers and comonomers entering the reactor), and 4) 0 to 40 wt % diluent or solvent (based upon the weight of the polymerization system), at a temperature above the crystallization temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 200 MPa, where the polymerization system comprises the monomers, any comonomer present, any diluent or solvent present, any scavenger present, and the polymer product; (b) forming a reactor effluent comprising a polymer-monomer mixture; (c) optionally heating the polymer-monomer mixture of (b) after it exits the reactor and before or after the pressure is reduced in step (e); (d) collecting the polymer-monomer mixture of (b) in a separation vessel; (e) reducing the pressure of the reactor effluent comprising the polymer-monomer mixture of (b) below the cloud point pressure to form a two-phase mixture comprising a polymer-rich phase and a monomer rich phase either before or after collecting the polymer-monomer mixture in the separation vessel where the pressure in the reactor (or at least one reactor if more than one is in use) is between 7 and 100 MPa higher than the pressure in the separation vessel and the temperature in the separation vessel is above the crystallization temperature of the polymer or above 80°C if the polymer has no crystallization temperature, whichever is higher; (f) separating the monomer-rich phase from the polymer-rich phase; (g) recycling the separated monomer-rich phase to one or more reactors of (a); and (h) recovering polymer from the polymer-rich phase.
摘要翻译：本发明涉及一种聚合烯烃的方法，包括以下步骤：（a）在致密流体均相聚合体系的一个或多个反应器中接触具有30重量％或更多的三个或多个碳原子的烯烃单体（基于当单体和共聚单体重量进入反应器时），其具有：1）一种或多种催化剂化合物，2）一种或多种活化剂，3）0至50摩尔％共聚单体（基于单体和共聚单体进入的量反应器）和4）0至40重量％的稀释剂或溶剂（基于聚合体系的重量），在高于聚合体系的结晶温度的温度下，并且压力不低于浊点压力10MPa 的聚合体系并且小于200MPa，其中聚合体系包含单体，存在的任何共聚单体，存在的任何稀释剂或溶剂，存在的任何清除剂和聚合物产物; （b）形成包含聚合物 - 单体混合物的反应器流出物; （c）任选地在（b）的聚合物 - 单体混合物离开反应器之后和在步骤（e）中压力降低之前或之后加热; （d）在分离容器中收集（b）的聚合物 - 单体混合物; （e）降低包含低于浊点压力的（b）的聚合物 - 单体混合物的反应器流出物的压力，以在收集聚合物之前或之后形成包含富聚合物相和富单体相的两相混合物单体混合物，其中反应器（或至少一个反应器如果使用多于一个的反应器）的压力比分离容器中的压力高7至100MPa，并且分离容器中的温度高于聚合物的结晶温度或高于80℃，如果聚合物没有结晶温度，以较高者为准; （f）从富含聚合物的相分离富单体相; （g）将分离的富单体相循环到（a）的一个或多个反应器中; 和（h）从富聚合物相中回收聚合物。

8. 发明申请

WO2008079565A8 POLYMER PRODUCTION AT SUPERCRITICAL CONDITIONS 审中-公开
公开(公告)号：WO2008079565A8
公开(公告)日：2008-07-03
申请号：PCT/US2007/085348
申请日：2007-11-21
申请人： EXXONMOBIL CHEMICAL PATENTS INC. , EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , CASTY, Gary, L. , COOK, Raymond, A. , KISS, Gabor , BRANT, Patrick
发明人： CASTY, Gary, L. , COOK, Raymond, A. , KISS, Gabor , BRANT, Patrick
IPC分类号： C08F10/06 , C08F2/06 , C08F4/62
摘要： This invention relates to a process to polymerize olefins comprising contacting, at a temperature of 600C or more and a pressure of at least 15 MPa, one or more olefin monomers having three or more carbon atoms, with: 1) a catalyst system comprising one or more activators and one or more nonmetallocene metal-centered, heteroaryl ligand catalyst compounds, where the metal is chosen from the Group 4, 5, 6, the lanthanide series, or the actinide series of the Periodic Table of the Elements, 2) optionally one or more comonomers, 3) optionally diluent or solvent, and 40 optionally solvent, wherein: a) the olefin monomers and any comonomers are present in the polymerization system at 40 weight % or more, b) the monomer having three or more carbon atoms is present at 80 wt% or more based upon the weight of all monomers and comonomers present in the feed, c) the polymerization occurs at a temperature above the solid- fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa, in the event the solid-fluid phase transition temperature of the polymerization system cannot be determined then the polymerization occurs at a temperature above the fluid fluid phase transition temperature.

9. 发明申请

WO2010027491A1 PROCESS FOR FEEDING ETHYLENE TO POLYMERIZATION REACTORS 审中-公开
标题翻译：将乙烯送入聚合反应器的方法
公开(公告)号：WO2010027491A1
公开(公告)日：2010-03-11
申请号：PCT/US2009/005000
申请日：2009-09-04
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , LATTNER, James, R. , MOHN, Gary, D.
发明人： KISS, Gabor , REYNOLDS, Robert, P. , CHU, John, W. , LATTNER, James, R. , MOHN, Gary, D.
IPC分类号： C08F2/00 , C08G85/00
CPC分类号： C08F10/02 , C08F110/02 , C08F210/16 , Y02P20/544 , C08F2/06 , C08F2/01 , C08F2500/12 , C08F210/06 , C08F2/00
摘要： Processes for feeding ethylene into a polymerization system operating in a liquid phase or supercritical phase, including providing a low -pressure ethylene stream, one or more low-pressure C3 to C20 monomer streams, an optional low-pressure inert solvent/diluent stream, and one or more reactors, metering and mixing the streams together to form an ethylene-carrying low-pressure blended liquid feed stream, pressurizing the ethylene-carrying low-pressure blended liquid feed stream to the polymenzation system pressure with one or more high-pressure pumps to form an ethylene-carrying high-pressure blended reactor feed stream, and feeding the ethylene- carrying high-pressure blended reactor feed stream to the one or more reactors. The monomer recycle stream may also be optionally blended with the ethylene feed stream and the C3 to C20 higher olefin before being pressurized to the reactor pressure.
摘要翻译：将乙烯进料到在液相或超临界相中操作的聚合体系中的方法，包括提供低压乙烯流，一种或多种低压C3至C20单体流，任选的低压惰性溶剂/稀释剂流，以及一个或多个反应器，将流量计量并混合在一起以形成携带乙烯的低压混合液体进料流，将带乙烯的低压混合液体进料流加压到具有一个或多个高压泵的聚合系统压力以形成携带乙烯的高压共混反应器进料流，并将携带乙烯的高压共混反应器进料流输送到一个或多个反应器。在加压至反应器压力之前，单体再循环料流也可以任选地与乙烯进料流和C 3至C 20的较高级烯烃共混。

10. 发明申请

WO2009142730A1 POLYMERIZATION PROCESSES FOR BROADENED MOLECULAR WEIGHT DISTRIBUTION 审中-公开
标题翻译：广泛分子量分布的聚合方法
公开(公告)号：WO2009142730A1
公开(公告)日：2009-11-26
申请号：PCT/US2009/003117
申请日：2009-05-20
申请人： EXXONMOBIL RESEARCH AND ENGINEERING COMPANY , KISS, Gabor , REYNOLDS, Robert, Patrick, Jr. , CHU, John, W. , BRANT, Patrick , LATTNER, James, R.
发明人： KISS, Gabor , REYNOLDS, Robert, Patrick, Jr. , CHU, John, W. , BRANT, Patrick , LATTNER, James, R.
IPC分类号： C08F2/01
CPC分类号： C08F10/00 , C08F110/06 , C08F2/06 , C08F2/01 , C08F2500/04
摘要： Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.
摘要翻译：提供了在聚合反应器中使用反应器温度梯度，反应器聚合物浓度梯度，单体浓度梯度，催化剂浓度梯度及其组合的连续均匀聚合体系中制备具有更宽分子量和/或组成分布的聚合物的方法。当使用茂金属催化剂和其它通常产生具有窄分子量和组成分布的聚合物的其它单中心催化剂时，这些方法是特别合适的。

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