Invention Publication
- Patent Title: PROCESS FOR THE PREPARATION OF AN UHMWPE HOMOPOLYMER
-
Application No.: US18111025Application Date: 2023-02-17
-
Publication No.: US20230322969A1Publication Date: 2023-10-12
- Inventor: Irfan SAEED , Esa KOKKO , Mika SALO , Sanjay RASTOGI , Dario ROMANO , Sara RONCA
- Applicant: BOREALIS AG
- Applicant Address: AT Vienna
- Assignee: BOREALIS AG
- Current Assignee: BOREALIS AG
- Current Assignee Address: AT Vienna
- Priority: EP 184561.1 2018.07.19
- The original application number of the division: US17261317 2021.01.19
- Main IPC: C08F110/02
- IPC: C08F110/02 ; C08F2/00 ; C08L23/06
Abstract:
A process for the preparation of an ultra-high molecular weight ethylene homopolymer having a MFR21 of 0.01 g/10 min or less, said process comprising:
(I) prepolymerising at least ethylene at a temperature of 0 to 90° C. in the presence of a heterogeneous Ziegler Natta catalyst to prepare an ethylene prepolymer having an Mw of 40,000 to 600,000 g/mol; and thereafter in the presence of the prepolymer and said catalyst;
(II) polymerising ethylene at a temperature of 55° C. or less, such as 20 to 55° C., to prepare said UHMW ethylene homopolymer; wherein the UHMW ethylene homopolymer comprises up to 8 wt.% of said prepolymer.
(I) prepolymerising at least ethylene at a temperature of 0 to 90° C. in the presence of a heterogeneous Ziegler Natta catalyst to prepare an ethylene prepolymer having an Mw of 40,000 to 600,000 g/mol; and thereafter in the presence of the prepolymer and said catalyst;
(II) polymerising ethylene at a temperature of 55° C. or less, such as 20 to 55° C., to prepare said UHMW ethylene homopolymer; wherein the UHMW ethylene homopolymer comprises up to 8 wt.% of said prepolymer.
Public/Granted literature
- US11965052B2 Process for the preparation of an UHMWPE homopolymer Public/Granted day:2024-04-23
Information query
