公开(公告)号：US08138283B2

公开(公告)日：2012-03-20

申请号：US12295152

申请日：2007-12-10

Applicant: Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

Inventor： Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

IPC: C08G65/20 ,  C08G65/46

CPC classification number: C08G65/20 ,  C08G65/2657 ,  C08G65/266 ,  C08G65/2696

Abstract: The present invention provides a process for changing the given mean molecular weight Mn in the continuous preparation of polytetrahydrofuran or tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of a telogen and/or of a comonomer over an acidic catalyst, wherein a) the molar ratio of telogen to tetrahydrofuran or to tetrahydrofuran and comonomer is changed, b) then the mean molecular weight of at least one sample is determined, c) until the mean molecular weight thus determined differs from the molecular weight to be achieved by the change, the already formed polytetrahydrofuran or the tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or tetrahydrofuran copolymer is at least partly depolymerized over an acidic catalyst and d) the tetrahydrofuran recovered by depolymerization is recycled at least partly into the polymerization.

Abstract translation: 本发明提供了在四氢呋喃或四氢呋喃共聚物的连续制备中改变给定的平均分子量Mn的方法，所述共聚单体是四氢呋喃或四氢呋喃共聚物的单酯或二酯，其在四环缩聚物和/或共聚单体存在下聚合四氢呋喃 在酸性催化剂上，其中a）季戊四醇与四氢呋喃或四氢呋喃和共聚单体的摩尔比改变，b）确定至少一种样品的平均分子量，c）直到如此确定的平均分子量与 通过改变实现的分子量，已经形成的聚四氢呋喃或四氢呋喃共聚物，聚四氢呋喃或四氢呋喃共聚物的单酯或二酯在酸性催化剂上至少部分解聚，以及d）通过解聚回收的四氢呋喃至少部分地再循环 进入聚合。

公开(公告)号：US20110288262A1

公开(公告)日：2011-11-24

申请号：US13205117

申请日：2011-08-08

Applicant: Erik René Delsman ,  Gert-Jan Schoenmakers

Inventor： Erik René Delsman ,  Gert-Jan Schoenmakers

IPC: C08G65/46

CPC classification number: C08G65/44 ,  C08G65/4093 ,  C08G65/485 ,  Y10T428/2975

Abstract: A poly(2,6-dimethyl-1,4-phenylene ether) having a high molecular weight and a reduced content of low molecular weight species can be prepared by a method that includes specific conditions for the oxidative polymerization, chelation, and isolation steps. The poly(2,6-dimethyl-1,4-phenylene ether) is particularly useful for the fabrication of fluid separation membranes.

公开(公告)号：US20110275766A1

公开(公告)日：2011-11-10

申请号：US13083696

申请日：2011-04-11

Applicant: Alvaro Carrillo ,  Stephen M. Farnell ,  Hua Guo

Inventor： Alvaro Carrillo ,  Stephen M. Farnell ,  Hua Guo

IPC: C08G65/46 ,  C08G65/38

CPC classification number: C08G65/46

Abstract: A poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst has a monomodal molecular weight distribution with a reduced content of very high molecular weight species. It also exhibits increased morpholine incorporation in the high molecular weight fraction. Compared to commercially available poly(2,6-dimethyl-1,4-phenylene ether) prepared using a di-n-butylamine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits reduced odor. Compared to other poly(2,6-dimethyl-1,4-phenylene ether) prepared using a morpholine-containing polymerization catalyst, the poly(2,6-dimethyl-1,4-phenylene ether) of the invention exhibits improved molecular weight build during compounding and improved compatibilization with polyamides.

公开(公告)号：US20050234219A1

公开(公告)日：2005-10-20

申请号：US11145816

申请日：2005-06-06

Applicant: Norberto Silvi ,  Mark Giammattei ,  Jan Keulen ,  David Woodruff ,  Paul Wilson ,  Paul Buckley ,  Norman Johnson

Inventor： Norberto Silvi ,  Mark Giammattei ,  Jan Keulen ,  David Woodruff ,  Paul Wilson ,  Paul Buckley ,  Norman Johnson

IPC: C08J3/12 ,  B29C47/00 ,  B29C47/76 ,  C08F6/10 ,  C08F6/12 ,  C08G63/89 ,  C08G65/46 ,  C08G73/10 ,  C08G75/20 ,  C08G77/34 ,  C08J3/215 ,  C08G2/00

CPC classification number: C08G65/46 ,  B29C47/0009 ,  B29C47/0871 ,  B29C47/767 ,  B82Y30/00 ,  C08F6/10 ,  C08F6/12 ,  C08G63/89 ,  C08G73/1053 ,  C08G75/20 ,  C08G77/34

Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.

公开(公告)号：US20050064129A1

公开(公告)日：2005-03-24

申请号：US10922194

申请日：2004-08-19

Applicant: Jiawen Dong ,  Hua Guo ,  Robert Hossan ,  Christian Lietzau ,  Vijay Mhetar

Inventor： Jiawen Dong ,  Hua Guo ,  Robert Hossan ,  Christian Lietzau ,  Vijay Mhetar

IPC: B29C47/38 ,  B29C47/60 ,  B29C47/68 ,  B29D17/00 ,  B29K71/00 ,  B32B3/02 ,  C08G65/46 ,  C08L25/02 ,  C08L25/06 ,  C08L71/00 ,  C08L71/10 ,  C08L71/12 ,  C11D17/00 ,  D01D1/10

CPC classification number: C08L71/10 ,  C08G65/46 ,  C08L25/02 ,  C08L25/04 ,  C08L71/12 ,  G11B7/2536 ,  Y10T428/2982 ,  C08L2666/18 ,  C08L2666/04

Abstract: A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a filtered polymeric composition having reduced levels of particulate impurities. The filtered polymeric composition prepared is suitable for use in data storage media applications.

Abstract translation: 公开了一种通过熔融过滤系统过滤包含聚（亚芳基醚）和聚（链烯基芳族化合物）的熔体来纯化聚合物材料的方法。 该方法提供具有降低的颗粒杂质含量的过滤的聚合物组合物。 所制备的经过滤的聚合物组合物适用于数据存储介质应用。

公开(公告)号：US5204410A

公开(公告)日：1993-04-20

申请号：US606415

申请日：1990-10-31

Applicant: John P. Banevicius ,  Alexandros Hasson ,  William E. Pecak

Inventor： John P. Banevicius ,  Alexandros Hasson ,  William E. Pecak

IPC: C08G65/46 ,  C08L71/12

CPC classification number: C08G65/46 ,  C08L71/123 ,  Y10S525/905

Abstract: Volatile substances in polyphenylene ether or polyphenylene ether/polystyrene compositions are substantially reduced by extruding the resins in a single pass using a plurality of stages comprising water injection and vacuum venting.

Abstract translation: 聚苯醚或聚苯醚/聚苯乙烯组合物中的挥发性物质通过使用包括注水和真空排气在内的多个阶段通过单次挤出来显着降低。

公开(公告)号：US5202480A

公开(公告)日：1993-04-13

申请号：US752703

申请日：1991-08-30

Applicant: Thomas R. Bierschenk ,  Timothy Juhlke ,  Hajimu Kawa ,  Richard J. Lagow

Inventor： Thomas R. Bierschenk ,  Timothy Juhlke ,  Hajimu Kawa ,  Richard J. Lagow

IPC: C07C41/48 ,  C07C41/60 ,  C07C43/313 ,  C07C43/315 ,  C08G2/30 ,  C08G4/00 ,  C08G65/00 ,  C08G65/30 ,  C08G65/323 ,  C08G65/34 ,  C08G65/46

CPC classification number: C07C41/60 ,  C07C41/48 ,  C07C43/313 ,  C07C43/315 ,  C08G2/30 ,  C08G4/00 ,  C08G65/007 ,  C08G65/30 ,  C08G65/3236 ,  C08G65/34 ,  C08G65/46

Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.

Abstract translation: 本发明涉及全氟聚醚和全卤代氯氟醚聚合物，其可以通过氟化通过缩醛，缩酮，聚缩醛，聚缩酮和原酸酯与元素氟的聚合制备的聚合物来制备。

公开(公告)号：US5043421A

公开(公告)日：1991-08-27

申请号：US389661

申请日：1989-08-04

Applicant: Joseph C. Golba, Jr. ,  Montgomery Meigs ,  Kenneth G. Powell ,  Sterling B. Brown

Inventor： Joseph C. Golba, Jr. ,  Montgomery Meigs ,  Kenneth G. Powell ,  Sterling B. Brown

IPC: B29C47/10 ,  B29C47/76 ,  C08F6/00 ,  C08F6/12 ,  C08G64/40 ,  C08G65/46 ,  C08G85/00

CPC classification number: B29C47/76 ,  B29C47/10 ,  C08G64/406 ,  C08G65/46 ,  C08G85/00 ,  B29C47/0004 ,  B29C47/0009 ,  B29C47/1027 ,  B29C47/1063

Abstract: Polymers, such as polyphenylene ethers, are isolated from solution in an extruder by addition of at least one non-solvent. Optional steps include removal of volatiles through vents or ports on the extruder and employment of an auxiliary non-solvent. Additional operations, such as blending with further polymers, fractionation of low molecular weight molecules and functionalization by chemical reaction, may also be performed in the extruder.

公开(公告)号：US4992222A

公开(公告)日：1991-02-12

申请号：US291534

申请日：1988-12-29

Applicant: John P. Banevicius ,  Alexandros Hasson ,  William E. Pecak

Inventor： John P. Banevicius ,  Alexandros Hasson ,  William E. Pecak

IPC: C08L25/04 ,  C08G65/46 ,  C08L71/00 ,  C08L71/12

CPC classification number: C08G65/46 ,  C08L71/123

Abstract: Volatile substances in polyphenylene ether or polyphenylene ether/polystyrene compositions are substantially reduced by extruding the resins in a single pass using a plurality of stages including water injection and vacuum venting.

公开(公告)号：US4673730A

公开(公告)日：1987-06-16

申请号：US853732

申请日：1986-04-18

Applicant: Hermann Siegert ,  Werner Ude

Inventor： Hermann Siegert ,  Werner Ude

IPC: C08G65/46 ,  C08L89/00

CPC classification number: C08G65/46

Abstract: Method for recovering an aromatic polyether as a solid product from a solution thereof in an organic solvent by precipitating with a fluorohydrocarbon which may also contain chlorine or bromine and which boils at -30.degree. C. to +100.degree. C.

Abstract translation: 从有机溶剂中的溶液中回收作为固体产物的芳香族聚醚的方法，通过用也可含有氯或溴的氟代烃沉淀并在-30℃至+ 100℃沸腾的方法。