公开(公告)号：US5258449A

公开(公告)日：1993-11-02

申请号：US008011

申请日：1993-01-22

Applicant: Vaseem Firdaus ,  Pradeep P. Shirodkar

Inventor： Vaseem Firdaus ,  Pradeep P. Shirodkar

IPC: C08F210/02 ,  C08F210/16 ,  C08J5/18 ,  C08L23/08 ,  C08L23/18

CPC classification number: C08F210/02 ,  C08F210/16 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815

Abstract: A film of a linear low density copolymer of ethylene (LLDPE) having an Mz/Mw ratio of greater than 3.5 and exhibiting excellent optical properties and impact strength.

公开(公告)号：US06458910B1

公开(公告)日：2002-10-01

申请号：US08647196

申请日：1996-04-15

Applicant: Vaseem Firdaus ,  Pradeep P. Shirodkar

Inventor： Vaseem Firdaus ,  Pradeep P. Shirodkar

IPC: C08F21000

CPC classification number: C08J5/18 ,  B29C47/0023 ,  B29C47/0026 ,  B29C47/8835 ,  B29C55/28 ,  B29K2023/0625 ,  C08F10/00 ,  C08J2323/08 ,  C08F4/642

Abstract: Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tube so cooled, to maintain the tube diameter identical to that of the annular die and expanding the tube or bubble to attenuate the walls thereof by introducing a gas to the interior of the tube or bubble. The resulting films are characterized by superior impact strength and MD tear resistance.

Abstract translation: 线性低密度聚乙烯的吹塑薄膜是通过高秸秆方法生产的，包括通过环形模头挤出线性低密度聚乙烯，形成挤出的熔融材料管，冷却挤压管，同时拉制冷却管，以保持管直径 与环形模具相同，并且通过将气体引导到管或气泡的内部而膨胀管或气泡以减弱其壁。 所得膜的特征在于优异的冲击强度和MD抗撕裂性。

公开(公告)号：US5840244A

公开(公告)日：1998-11-24

申请号：US820461

申请日：1992-01-14

Applicant: Vaseem Firdaus ,  Pradeep P. Shirodkar

Inventor： Vaseem Firdaus ,  Pradeep P. Shirodkar

IPC: B29C47/88 ,  B29C55/28 ,  B29C47/20

CPC classification number: B29C55/28 ,  B29C47/0026 ,  B29C47/8835 ,  B29K2023/0625

Abstract: Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tube so cooled, to maintain the tube diameter identical to that of the annular die and expanding the tube or bubble to attenuate the walls thereof by introducing a gas to the interior of the tube or bubble. The resulting films are characterized by superior impact strength and MD tear resistance.

Abstract translation: 线性低密度聚乙烯的吹塑薄膜是通过高秸秆方法生产的，包括通过环形模头挤出线性低密度聚乙烯，形成挤出的熔融材料管，冷却挤压管，同时拉制冷却管，以保持管直径 与环形模具相同，并且通过将气体引导到管或气泡的内部而膨胀管或气泡以减弱其壁。 所得膜的特征在于优异的冲击强度和MD抗撕裂性。

公开(公告)号：US5210167A

公开(公告)日：1993-05-11

申请号：US797002

申请日：1991-11-25

Applicant: Vaseem Firdaus ,  Pradeep P. Shirodkar

Inventor： Vaseem Firdaus ,  Pradeep P. Shirodkar

IPC: C08F210/02 ,  C08F210/16 ,  C08J5/18 ,  C08L23/08

CPC classification number: C08F210/02 ,  C08F210/16 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815

Abstract: A film of a linear low density copolymer of ethylene (LLDPE) having an Mz/Mw ratio of greater than 3.5 and exhibiting excellent optical properties and impact strength.

Abstract translation: 具有Mz / Mw比大于3.5的乙烯（LLDPE）线性低密度共聚物的膜，具有优异的光学性能和冲击强度。

公开(公告)号：US09458310B2

公开(公告)日：2016-10-04

申请号：US13584137

申请日：2012-08-13

Applicant: Pradeep P. Shirodkar ,  Jianya J. Cheng ,  Andy H. Tsou ,  Pamela J. Wright ,  Johannes M. Soulages

Inventor： Pradeep P. Shirodkar ,  Jianya J. Cheng ,  Andy H. Tsou ,  Pamela J. Wright ,  Johannes M. Soulages

IPC: C08L23/06 ,  C08J5/18 ,  C08L23/08 ,  C08F36/04 ,  C08C19/02 ,  C08G81/02 ,  C08C19/44 ,  C08G83/00 ,  C08L25/04

CPC classification number: C08L23/06 ,  C08C19/02 ,  C08C19/44 ,  C08F36/04 ,  C08G81/022 ,  C08G83/003 ,  C08G83/006 ,  C08J5/18 ,  C08J2323/06 ,  C08J2400/202 ,  C08L9/00 ,  C08L23/0815 ,  C08L25/04 ,  C08L2203/16 ,  C08F4/488 ,  C08L101/005

Abstract: The present invention relates to polyethylene compositions comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, in particular, this invention further relates to polyethylene blends comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, wherein the modifier has: 1) a g′ value less than 0.75; 2) a Cayley tree topology with a layer number of 2 or more more; and 3) a average Mw between the branch points of 1,500 g/mol or more.

Abstract translation: 本发明涉及包含一种或多种乙烯聚合物和一种或多种树枝状烃聚合物改性剂的聚乙烯组合物，特别地，本发明还涉及包含一种或多种乙烯聚合物和一种或多种树枝状烃聚合物改性剂的聚乙烯共混物，其中改性剂 具有：1）ag'值小于0.75; 2）层数为2以上的Cayley树拓扑; 和3）分支点之间的平均Mw为1,500g / mol以上。

公开(公告)号：US08629217B2

公开(公告)日：2014-01-14

申请号：US13584284

申请日：2012-08-13

Applicant: Yong Yang ,  Pradeep P. Shirodkar ,  Jianya Cheng ,  Andy H. Tsou ,  Arnold Lustiger ,  Johannes M. Soulages

Inventor： Yong Yang ,  Pradeep P. Shirodkar ,  Jianya Cheng ,  Andy H. Tsou ,  Arnold Lustiger ,  Johannes M. Soulages

IPC: C08L23/08 ,  C08L23/06 ,  C08L65/00 ,  C08G61/08

CPC classification number: C08L23/24 ,  C08L23/0815 ,  C08F210/00 ,  C08F4/80 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/04 ,  C08F2500/09 ,  C08F2500/26 ,  C08L101/005 ,  C08F2222/1026

Abstract: The present invention relates to polyethylene compositions comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, in particular, this invention further relates to polyethylene blends comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, wherein the modifier has: 1) a g′vis value less than 0.75; 2) at least 0.6 ppm ester groups as determined by 1H NMR; 3) a Tm of 100° C. or more; 4) an Mw of 50,000 g/mol or more, as determined by GPC; 5) an average number of carbon atoms between branch points of 70 or more as determined by 1H NMR.

Abstract translation: 本发明涉及包含一种或多种乙烯聚合物和一种或多种树枝状烃聚合物改性剂的聚乙烯组合物，特别地，本发明还涉及包含一种或多种乙烯聚合物和一种或多种树枝状烃聚合物改性剂的聚乙烯共混物，其中改性剂 具有：1）g'vis值小于0.75; 2）通过1 H NMR测定的至少0.6ppm的酯基; 3）Tm为100℃以上; 4）通过GPC测定的Mw为50,000g / mol以上的Mw; 5）通过1 H NMR测定的分支点之间的平均碳原子数为70以上。

公开(公告)号：US07935760B2

公开(公告)日：2011-05-03

申请号：US11296830

申请日：2005-12-07

Applicant: Peijun Jiang ,  Aspy K. Mehta ,  Armenag H. Dekmezian ,  Sunny Jacob ,  Andrew G. Narvaez ,  Pradeep P. Shirodkar

Inventor： Peijun Jiang ,  Aspy K. Mehta ,  Armenag H. Dekmezian ,  Sunny Jacob ,  Andrew G. Narvaez ,  Pradeep P. Shirodkar

IPC: C08L23/00 ,  C08L23/04

CPC classification number: C08L23/10 ,  C08F110/06 ,  C08F210/06 ,  C08L23/145 ,  C08L2308/00 ,  C08L2312/00 ,  C08L2312/02 ,  C08L2314/06 ,  C08F2/001 ,  C08L2666/06 ,  C08F210/18 ,  C08F236/20 ,  C08F2500/20

Abstract: In a process for producing a heterogeneous polymer blend, at least one first monomer is polymerized in a first reaction zone in the presence of a supported catalyst to produce a thermoplastic first polymer having a crystallinity of at least 30%. At least part of said first polymer is then contacted with at least one second monomer and at least one polyene in a second reaction zone under conditions sufficient to polymerize said second monomer to produce a second polymer having a crystallinity of less than 20%. The second polymer is at least partially cross-linked in the second reaction zone such that at least a fraction of the second polymer is insoluble in xylene and such that the first and second polymers form different phases of the blend.

Abstract translation: 在制备非均相聚合物共混物的方法中，至少一种第一单体在负载型催化剂的存在下在第一反应区中聚合以产生具有至少30％的结晶度的热塑性第一聚合物。 然后在足以使所述第二单体聚合以产生结晶度小于20％的第二聚合物的条件下，将至少部分所述第一聚合物与至少一种第二单体和至少一种多烯在第二反应区中接触。 第二聚合物在第二反应区域中至少部分交联，使得至少一部分第二聚合物不溶于二甲苯并使得第一和第二聚合物形成共混物的不同相。

公开(公告)号：US20100164133A1

公开(公告)日：2010-07-01

申请号：US12722180

申请日：2010-03-11

Applicant: Sandra D. Schregenberger ,  James F. Lottes ,  Pradeep P. Shirodkar ,  Porter C. Shannon

Inventor： Sandra D. Schregenberger ,  James F. Lottes ,  Pradeep P. Shirodkar ,  Porter C. Shannon

IPC: B29C47/00 ,  C08F210/02

CPC classification number: C08L23/06 ,  B29B7/421 ,  B29C48/022 ,  B29C48/10 ,  B29C48/52 ,  B29C48/53 ,  B29C67/246 ,  B29C2791/005 ,  B29K2023/06 ,  B29K2023/0641 ,  C08F8/06 ,  C08F8/50 ,  C08F110/02 ,  C08F2810/10 ,  C08L23/04 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2666/06

Abstract: A process is provided for extruding a bimodal polyethylene resin. The process includes providing a polyethylene homopolymer or copolymer resin having a bimodal molecular weight distribution; conveying the resin through an extruder having a feed zone in which the resin is not melted, a melt-mixing zone in which at least a portion of the resin is melted, and a melt zone in which the resin is in a molten state, each zone being partially filled with the resin; and contacting the molten resin in the melt zone with a gas mixture of 8 to 40% by volume O2. The resin can be further pelletized. The oxygen-tailored resin can be used to make polyethylene films having improved bubble stability.

Abstract translation: 提供了挤出双峰聚乙烯树脂的方法。 该方法包括提供具有双峰分子量分布的聚乙烯均聚物或共聚物树脂; 将树脂输送通过具有未熔融树脂的进料区域的挤出机，至少部分树脂熔融的熔融混合区域和树脂处于熔融状态的熔融区域 部分地填充有树脂; 并使熔融区中的熔融树脂与8至40体积％O 2的气体混合物接触。 树脂可进一步造粒。 氧气调整树脂可用于制备具有改善气泡稳定性的聚乙烯膜。

公开(公告)号：US07691956B2

公开(公告)日：2010-04-06

申请号：US11628876

申请日：2005-06-20

Applicant: Robert O. Hagerty ,  Chia S. Chee ,  Randall B. Laird ,  Michael A. Risch ,  Pradeep P. Shirodkar ,  Zerong Lin ,  Larry L. Iaccino

Inventor： Robert O. Hagerty ,  Chia S. Chee ,  Randall B. Laird ,  Michael A. Risch ,  Pradeep P. Shirodkar ,  Zerong Lin ,  Larry L. Iaccino

IPC: C08F2/14 ,  C08F4/6592

CPC classification number: C08F210/16 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65925 ,  C08F4/65927 ,  Y10S526/912 ,  Y10S526/943 ,  C08F2/06 ,  C08F2/14 ,  C08F4/65912 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/08 ,  C08F2500/03 ,  C08F210/08

Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to the recovery of the hydrofluorocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of ethylene based polymers using bulky ligand metallocene-type catalyst systems.

Abstract translation: 本发明涉及在氢氟碳化合物或全氟化碳存在下制备聚合物并回收聚合物的方法。 所提供的方法使聚合方法能够在反应体系中以最小的结垢进行聚合反应，以及回收氢氟烃和其它烃，例如在该方法中重新使用的烃或来自聚合方法的烃副产物。 本发明在使用大体积配体茂金属型催化剂体系的乙烯基聚合物的生产中特别有益。

公开(公告)号：US06486089B1

公开(公告)日：2002-11-26

申请号：US08555816

申请日：1995-11-09

Applicant: Yury V. Kissin ,  Robert I. Mink ,  Thomas E. Nowlin ,  Pradeep P. Shirodkar ,  Sandra D. Schregenberger ,  Grace O. Tsien

Inventor： Yury V. Kissin ,  Robert I. Mink ,  Thomas E. Nowlin ,  Pradeep P. Shirodkar ,  Sandra D. Schregenberger ,  Grace O. Tsien

IPC: C08F402

CPC classification number: B01J31/1616 ,  B01J31/122 ,  B01J31/143 ,  B01J31/2295 ,  B01J37/0203 ,  B01J37/0205 ,  B01J2531/48 ,  C08F4/61904 ,  C08F4/61912 ,  C08F4/61916 ,  C08F10/00 ,  Y10S526/943

Abstract: The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising (1) providing silica which is porous and has a particle size of 1 to 250 microns, having pores which have an average diameter of 50 to 500 Angstroms and having a pore volume of 0.5 to 5.0 cc/g; (2) slurrying the silica in an aliphatic solvent having a boiling point less than 110° C.; (3) providing a volume of a solution comprising metallocene and alumoxane wherein the volume of solution is less than that required to form a slurry of the silica, wherein the concentration of alumoxane, expressed as Al weight percent, is 5 to 20; (4) contacting the silica slurry (2) with said volume of said solution (3) and allowing the solution to impregnate the pores of silica and, to disperse the metallocene in and on the carrier; (5) evaporating the solvents from the contacted and impregnated silica to recover dry free-flowing catalyst particles.

Abstract translation: 本发明涉及一种将过渡金属茂金属络合物均匀分散在载体上的方法，包括（1）提供多孔的，具有1至250微米的粒径的二氧化硅，具有平均直径为50至500埃的孔， 孔体积为0.5-5.0cc / g;（2）将二氧化硅在沸点小于110℃的脂族溶剂中制浆;（3）提供体积的包含茂金属和铝氧烷的溶液，其中体积为 溶液小于形成二氧化硅浆料所需的溶液，其中铝氧烷的浓度以Al重量百分比表示为5至20; （4）使二氧化硅浆料（2）与所述体积的所述溶液（3）接触，并使所述溶液浸渍二氧化硅的孔隙，并将所述茂金属分散在所述载体上和载体上; （5）从接触和浸渍的二氧化硅蒸发溶剂以回收干燥的自由流动的催化剂颗粒。