Invention Grant
- Patent Title: Process for producing multimodal polyethylene blends including ultra-high molecular weight components
-
Application No.: US15539125Application Date: 2015-12-21
-
Publication No.: US10597470B2Publication Date: 2020-03-24
- Inventor: Bernd Kretzschmar , Carl-Gustaf Ek , Thomas Rätzsch , Yi Liu , Sandeep Tyagi
- Applicant: BOREALIS AG
- Applicant Address: AT Vienna
- Assignee: BOREALIS AG
- Current Assignee: BOREALIS AG
- Current Assignee Address: AT Vienna
- Agency: Insigne LLP
- Priority: EP14004366 20141222
- International Application: PCT/EP2015/002589 WO 20151221
- International Announcement: WO2016/102063 WO 20160630
- Main IPC: C08L23/06
- IPC: C08L23/06 ; C08L23/00 ; C08F10/02 ; C08L23/04 ; C08F2/00

Abstract:
The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of blending a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 and a polyethylene fraction (A-2) having a lower Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 with a weight ratio of (A-1) to (A-2) of 45:55 to 80:20 to form a first polyethylene resin (A) having a Mw of equal to or more than 200 kg/mol to equal to or less than 1500 kg/mol, a melt flow rate MFR5 (190° C., 5 kg) of 0.001 to 10 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3, blending the first polyethylene resin (A) with a second polyethylene resin (B) having a Mw of equal to or more than 50 kg/mol to less than 700 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 to form the multimodal polyethylene composition, wherein the multimodal polyethylene composition a melt flow rate MFR5 (190° C., 5 kg) of 0.01 to 10 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3, a polyethylene composition obtainable by said process and the polyethylene resin of said first blending step.
Public/Granted literature
- US20170349678A1 PROCESS FOR PRODUCING MULTIMODAL POLYETHYLENE BLENDS INCLUDING ULTRA-HIGH MOLECULAR WEIGHT COMPONENTS Public/Granted day:2017-12-07
Information query