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：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.