公开(公告)号：US08933175B2

公开(公告)日：2015-01-13

申请号：US13599290

申请日：2012-08-30

申请人： Youlu Yu ,  Chung C. Tso ,  David C. Rohlfing ,  Paul J. Deslauriers ,  Melvin Hildebrand ,  Max P. McDaniel ,  Qing Yang

发明人： Youlu Yu ,  Chung C. Tso ,  David C. Rohlfing ,  Paul J. Deslauriers ,  Melvin Hildebrand ,  Max P. McDaniel ,  Qing Yang

IPC分类号： C08F10/02 ,  C08F110/02 ,  C08F6/04 ,  C08L23/06

CPC分类号： C08L23/06 ,  C08F6/04 ,  C08L2205/025 ,  C08L2207/07 ,  C08L2308/00 ,  C08L2314/02 ,  C08F110/02 ,  C08F2500/04 ,  C08F2500/09

摘要： A composition comprising a polyethylene wherein the composition is enriched in polymer molecules having topological variations by an enrichment factor ω and wherein the composition displays a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms. A composition comprising an isolated Ziegler-catalyzed polyethylene having a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms at the high molecular weight end.

摘要翻译： 一种包含聚乙烯的组合物，其中所述组合物富集具有通过富集因子ω的拓扑变化的聚合物分子，并且其中所述组合物显示每1000个总碳原子大于约0.5个长链分支的长链支化频率。 包含分子齐格勒催化的聚乙烯的组合物，其在高分子量末端的每1000个总碳原子具有大于约0.5个长链支链的长链支化频率。

公开(公告)号：US07241620B2

公开(公告)日：2007-07-10

申请号：US10754373

申请日：2004-01-09

申请人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

发明人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

IPC分类号： G01N30/02 ,  C08F6/12

CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

摘要翻译： 可以制备聚合物级分例如聚乙烯级分，其具有小于约2.3的PDI和大于约1,000,000g / mol，3,000,000g / mol或6,000,000g / mol的M max。 通过首先将母体聚合物溶解在相对良好的溶剂中，将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分，从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。

公开(公告)号：US07691633B2

公开(公告)日：2010-04-06

申请号：US11766518

申请日：2007-06-21

申请人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

发明人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

IPC分类号： C08F210/02 ,  G01N30/02 ,  C08F6/12

CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

摘要翻译： 可以制备聚合物级分，例如具有小于约2.3的PDI和大于约1,000,000g / mol的Mw，3,000,000g / mol或6,000,000g / mol的聚乙烯级分。 通过首先将母体聚合物溶解在相对良好的溶剂中，将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分，从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。

公开(公告)号：US20070249053A1

公开(公告)日：2007-10-25

申请号：US11766518

申请日：2007-06-21

申请人： Chung Tso ,  Melvin Hildebrand ,  Paul DesLauriers ,  Youlu Yu

发明人： Chung Tso ,  Melvin Hildebrand ,  Paul DesLauriers ,  Youlu Yu

IPC分类号： C08L23/00

CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

公开(公告)号：US20050154169A1

公开(公告)日：2005-07-14

申请号：US10754373

申请日：2004-01-09

申请人： Chung Tso ,  Melvin Hildebrand ,  Paul DesLauriers ,  Youlu Yu

发明人： Chung Tso ,  Melvin Hildebrand ,  Paul DesLauriers ,  Youlu Yu

IPC分类号： C08F6/04 ,  C08F10/02 ,  C08F110/02

CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

摘要翻译： 可以制备聚合物级分例如聚乙烯级分，其具有小于约2.3的PDI和大于约1,000,000g / mol，3,000,000g / mol或6,000,000g / mol的M max。 通过首先将母体聚合物溶解在相对良好的溶剂中，将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分，从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。