公开(公告)号：US10221262B2

公开(公告)日：2019-03-05

申请号：US15029894

申请日：2014-10-24

Applicant: DSM IP ASSETS B.V.

Inventor： John Richard Severn ,  Romain Berthoud ,  Timothy James Kidd

IPC: C08F110/02 ,  C08F10/02 ,  C08F4/659

Abstract: The invention relates to a process for the preparation of a particulate ultra high molecular weight polyethylene (pUHMWPE copolymer, comprising the steps of preparing a magnesium containing carrier, loading the carrier with a organometallic compound forming a supported catalyst and contacting the supported catalyst with ethylene and at least one olefinic co-monomer under polymerization conditions, wherein the organometallic compound is of the formula R33P═N—TiCpXn.

公开(公告)号：US10676844B2

公开(公告)日：2020-06-09

申请号：US15781789

申请日：2016-12-12

Applicant: DSM IP Assets B.V.

Inventor： Tom Antonius Philomena Engels ,  Gert De Cremer ,  Romain Berthoud ,  Roman Stepanyan ,  Peter Roozemond ,  Filip Stefan Emiel Oosterlinck ,  John Richard Severn

IPC: D01F6/30 ,  D01D5/06 ,  D01F6/46 ,  C08F110/02 ,  D01F6/04 ,  C08F10/02

Abstract: The invention relates to a process for the preparation of a gel spun UHMWPE fiber comprising the steps of providing an ultra high molecular weight polyethylene composition having an intrinsic viscosity (IV) of at least 8 dl/g, a co-monomer content (CBR) of a least 0.05 SCB/1000TC, a mass averaged distribution of the co-monomer (CMAD) of at least 0.05, wherein the co-monomer has at least 4 carbon atoms, dissolving the composition in a solvent to form a polymer solution having a UHMWPE concentration of between 2 and 40 wt %, spinning the polymer solution through a multi orifice die plate to form a solution fibers, cooling the solution fiber to below 80° C. to form a gel fiber, drawing the fiber in at least one step to form a drawn fiber, removing at least a portion of the solvent before, during or after the drawing, wherein the ratio CMAD to CBR is greater than 1.0. The invention further relates to a gel-spun UHMWPE fiber obtainable by the process and products comprising said gel-spun UHMWPE fiber.

公开(公告)号：US10647792B2

公开(公告)日：2020-05-12

申请号：US15691669

申请日：2017-08-30

Applicant: DSM IP ASSETS B.V.

Inventor： John Richard Severn ,  Romain Berthoud ,  Timothy James Kidd

IPC: C08F110/02 ,  C08F10/02 ,  C08F4/659

Abstract: Particulate ultra high molecular weight polyethylene (pUHMWPE) are disclosed having an intrinsic viscosity (IV) of at least 4 dl/g, a molecular weight distribution Mw/Mn of less than 4.0, a median particle size D50 of between 50 and 200 μm, a residual Ti-content of less than 10 ppm, a residual Si-content of less than 50 ppm, and a total ash content of less than 1000 ppm.

公开(公告)号：US09771440B2

公开(公告)日：2017-09-26

申请号：US15029871

申请日：2014-10-24

Applicant: DSM IP ASSETS B.V.

Inventor： John Richard Severn ,  Romain Berthoud ,  Timothy James Kidd

IPC: C08F110/02 ,  C08F10/02 ,  C08F4/659

CPC classification number: C08F110/02 ,  C08F4/65912 ,  C08F4/65916 ,  C08F10/02 ,  C08F2420/03 ,  C08F2420/04 ,  C08F4/6592 ,  C08F2500/01 ,  C08F2500/03 ,  C08F2500/17 ,  C08F2500/18 ,  C08F2500/24

Abstract: The invention relates to a process for the preparation of a particulate ultra high molecular weight polyethylene (UH-MWPE), comprising the steps of preparing a magnesium containing carrier, loading the carrier with a organometallic compound forming a supported catalyst and contacting the supported catalyst with at least ethylene under polymerization conditions, wherein the organometallic compound is of the formula R33P═N—TiCpXn.