公开(公告)号：US20240279451A1

公开(公告)日：2024-08-22

申请号：US18568696

申请日：2022-06-09

Applicant: BOREALIS AG

Inventor： Jingbo WANG ,  Markus GAHLEITNER ,  Elisabeth POTTER ,  Meta CIGON

IPC: C08L23/16 ,  C08F2/00 ,  C08F210/06 ,  C08K5/3432

CPC classification number: C08L23/16 ,  C08F2/001 ,  C08F210/06 ,  C08K5/3432 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2314/02

Abstract: The invention relates to a polypropylene composition comprising: a) a bimodal random Ziegler-Natta propylene copolymer having a comonomer content of 2.0 to 4.5 wt.-%, said copolymer comprising: (i) 30 to 70 wt.-% of a first propylene copolymer having a comonomer content in the range of 0.1 to 4.5 wt.-% relative to the total weight of the first propylene copolymer, and an MFR2 of 1 to 100 g/10 min; and (ii) 70 to 30 wt.-% of a second propylene copolymer having a comonomer content in the range of 1.0 to 15 wt.-% relative to the total weight of the second propylene copolymer and an MFR2 of 1 to 100 g/10 min; with the proviso that the comonomer content of the second propylene copolymer (ii) is higher than for the first propylene copolymer (i); and b) at least one hindered amine light stabiliser.

公开(公告)号：US20240279450A1

公开(公告)日：2024-08-22

申请号：US18568213

申请日：2022-06-03

Applicant: Basell Poliolefine Italia S.r.l.

Inventor： Rainer Köhler ,  Mikhail Dureev ,  Michele Grazzi

IPC: C08L23/16 ,  B29C45/00 ,  B29K23/00 ,  B29K309/08 ,  B29L31/30 ,  C08F2/34 ,  C08F10/14 ,  C08J5/04 ,  C08K7/14

CPC classification number: C08L23/16 ,  B29C45/0005 ,  B29C45/0055 ,  C08F2/34 ,  C08F10/14 ,  C08J5/043 ,  C08K7/14 ,  B29K2023/16 ,  B29K2309/08 ,  B29L2031/3005 ,  B29L2031/3055 ,  C08J2323/16 ,  C08K2201/003 ,  C08K2201/004 ,  C08L2205/035 ,  C08L2205/08 ,  C08L2207/02 ,  C08L2314/02

Abstract: A filled polyolefin composition made from or containing a blend of a 30-70 wt. % of a first heterophasic polypropylene (HECO1) and 70-30 wt. % of a second heterophasic polypropylene (HECO2), wherein the heterophasic copolymers differ in MFR and type of comonomers, in combination with glass fibers and optionally a compatibilizer.

公开(公告)号：US12065522B2

公开(公告)日：2024-08-20

申请号：US17262075

申请日：2019-07-25

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Erik Delsman ,  Petrus Johannes Hubertus Bronsaer ,  Henrica Norberta Alberta Maria Steenbakkers-Menting ,  Gopala Krishna Surisetty

IPC: C08F210/06 ,  C08F2/01 ,  C08F4/646 ,  C08F4/654 ,  C08F210/02 ,  C08F210/08 ,  C08F210/14 ,  C08L23/16 ,  B01J19/00 ,  C08F210/16 ,  C08L23/20

CPC classification number: C08F210/06 ,  C08F2/01 ,  C08F4/646 ,  C08F4/654 ,  C08F210/02 ,  C08F210/08 ,  C08F210/14 ,  C08L23/16 ,  B01J19/0053 ,  B01J2219/182 ,  C08F210/16 ,  C08L23/20 ,  C08L2314/02

Abstract: The invention relates to a process for production of terpolymers, in particular for the polymerization of propylene, and two other distinct monomers chosen from a group comprising ethylene and a C4-C12 α-olefin in a horizontal stirred reactor comprising an agitated bed and several reaction zones for forming polymer particles.

公开(公告)号：US20240150503A1

公开(公告)日：2024-05-09

申请号：US18530084

申请日：2023-12-05

Applicant: W.R. GRACE & CO.-CONN.

Inventor： Matthew Fedec ,  Jan Van Egmond ,  Manu Rego ,  John Kaarto ,  Li-Min Tau

IPC: C08F210/06 ,  C08F210/16 ,  C08K5/053 ,  C08K5/1575 ,  C08K5/5419 ,  C08L23/14 ,  C08L23/16

CPC classification number: C08F210/06 ,  C08F210/16 ,  C08K5/053 ,  C08K5/1575 ,  C08K5/5419 ,  C08L23/14 ,  C08L23/16 ,  C08L2203/30 ,  C08L2314/02

Abstract: A propylene-ethylene copolymer includes propylene as a primary monomer, an ethylene content (ET) of 3.0% to 5% by weight, a melt flow rate of from 20 to 45 g/10 min, a xylene soluble fraction (XS) of from 2.0% to 7.0% by weight, and an XS/ET ratio of less than or equal to 1.51.

公开(公告)号：US11965052B2

公开(公告)日：2024-04-23

申请号：US18111025

申请日：2023-02-17

Applicant: BOREALIS AG

Inventor： Irfan Saeed ,  Esa Kokko ,  Mika Salo ,  Sanjay Rastogi ,  Dario Romano ,  Sara Ronca

IPC: C08F110/02 ,  C08F2/00 ,  C08F4/02 ,  C08F4/649 ,  C08F4/654 ,  C08F4/655 ,  C08L23/06

CPC classification number: C08F4/6492 ,  C08F2/001 ,  C08F4/025 ,  C08F4/6546 ,  C08F4/6555 ,  C08F110/02 ,  C08L23/06 ,  C08F2500/01 ,  C08F2500/12 ,  C08F2500/26 ,  C08F2500/34 ,  C08F2500/35 ,  C08L2203/16 ,  C08L2207/068 ,  C08L2314/02

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.

公开(公告)号：US20240059812A1

公开(公告)日：2024-02-22

申请号：US18267380

申请日：2021-12-15

Applicant: PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED

Inventor： Worawat CHUENCHEEP ,  Nitipat PHICHITSURATHAWORN

IPC: C08F110/02 ,  C08F4/646 ,  C08F4/642 ,  C08L23/08

CPC classification number: C08F110/02 ,  C08F4/6465 ,  C08F4/6421 ,  C08L23/0815 ,  C08L2314/02

Abstract: The present invention relates to a process to control the molecular weight distribution of polyethylene and to reduce the smoke quantity during the formation of polyethylene, wherein the process for preparing polyethylene having narrow molecular weight distribution, comprising the following steps:



a) continuously polymerizing ethylene by subjecting ethylene stream, hydrogen, solvent, Ziegler-Natta catalyst comprising titanium, co-catalyst, external electron donor selected from alkoxysilane compound into the reactor to produce polymer slurry;
b) removing residue reaction gas from the polymer slurry stream obtained from a) and
c) separating polymer stream in b) from the solvent.

公开(公告)号：US20240026089A1

公开(公告)日：2024-01-25

申请号：US18036000

申请日：2021-11-12

Applicant: Asahi Kasei Kabushiki Kaisha

Inventor： Naoya Okitsu

IPC: C08J3/12 ,  C08L23/08 ,  H01M50/417

CPC classification number: C08J3/12 ,  C08L23/0815 ,  H01M50/417 ,  C08J2323/08 ,  C08L2314/02 ,  C08L2207/068

Abstract: A polyethylene powder having a viscosity average molecular weight of 100,000 or more and 2,500,000 or less, wherein, in a torque curve obtained when kneading the polyethylene powder under the following using a Labo Plastomill, a slope of a straight line connecting two local maximum points is 2 N·m/min or more and 15 N·m/min or less:

After 24 g of liquid paraffin is kneaded for 10 minutes using a Labo Plastomill Mixer, produced by Toyo Seiki Seisaku-sho, Ltd. (unit model: 30C150, mixer model: R-60) at a set temperature of 114° C. and a rotation speed of 5 rpm, 16 g of the polyethylene powder and 0.4 g of an antioxidant are added thereto, followed by kneading at a rotation speed of 30 rpm for 3 minutes, and then the set temperature is raised from 114° C. to 163° C. over 1 minute; and after the temperature rise, the mixture is kneaded at a set temperature of 163° C. and a rotation speed of 30 rpm for 5 minutes.

公开(公告)号：US11866521B2

公开(公告)日：2024-01-09

申请号：US16332006

申请日：2017-09-07

Applicant: Thai Polyethylene Co., Ltd. ,  SCG Chemicals Co., Ltd.

Inventor： Piyawan Tiyapiboonchaiya ,  Patcharin Samphawamontri ,  Warachad Klomkamol

IPC: C08F10/02 ,  C08F2/00 ,  C08F2/18 ,  C08F2/01 ,  C08L23/08

CPC classification number: C08F10/02 ,  C08F2/001 ,  C08F2/01 ,  C08F2/18 ,  C08L23/0815 ,  C08L2207/062 ,  C08L2207/066 ,  C08L2314/02

Abstract: The present invention relates to a process for producing a multimodal polyethylene composition in the reactor system according to the invention, comprising; (a) polymerizing ethylene in an inert hydrocarbon medium in the first reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen in an amount of 0.1-95% by mol with respect to the total gas present in the vapor phase in the first reactor to obtain a low molecular weight polyethylene or a medium molecular weight polyethylene; (b) removing in the hydrogen removal unit 98.0 to 99.8% by weight of the hydrogen comprised in a slurry mixture obtained from the first reactor at a pressure in the range of 103-145 kPa (abs) and transferring the obtained residual mixture to the second reactor; (c) polymerizing ethylene and optionally C4 to C12 α-olefin comonomer in the second reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and in the presence of hydrogen in an amount obtained in step (b) to obtain a first high molecular weight polyethylene or a first ultra high molecular weight polyethylene in the form of a homopolymer or a copolymer and transferring a resultant mixture to the third reactor; and (d) polymerizing ethylene, and optionally α-olefin comonomer in the third reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen, wherein the amount of hydrogen in the third reactor is in a range of 1-70% by mol, preferably 1-60% by mol with respect to the total gas present in the vapor phase in the third reactor or optionally substantial absence of hydrogen to obtain a second high molecular weight polyethylene or a second ultra high molecular weight polyethylene homopolymer or copolymer; and a multimodal polyethylene composition obtainable this way.

公开(公告)号：US20240002555A1

公开(公告)日：2024-01-04

申请号：US18253143

申请日：2021-11-23

Applicant: BOREALIS AG

Inventor： Jingbo Wang ,  Markus Gahleitner ,  Klaus Bernreitner ,  Pauli Leskinen ,  Emilia Tiitinen

IPC: C08F10/06 ,  C08L23/14

CPC classification number: C08F10/06 ,  C08L23/142 ,  C08L2205/025 ,  C08L2205/24 ,  C08L2308/00 ,  C08L2314/02 ,  C08L2314/06 ,  C08L2205/035

Abstract: A process for the preparation of isotactic propylene polymer compositions involving the polymerisation of propylene and optionally one or more comonomers selected from ethylene and α-olefins containing 4 to 12 carbon atoms in one or more reaction steps in the present of a catalyst system comprising 45 to 99 wt.-% of a metallocene catalyst and 1 to 55 wt.-% of a Ziegler Natta catalyst having a non-phthalate internal donor and having been prepolymerised with a monomer (I) of the general formula CH2═CH—CHR1R2 (I) wherein R1 and R2 are either individual alkyl groups with one or more carbon atoms or form an optionally substituted saturated, unsaturated or aromatic ring or a fused ring system containing 4 to 20 carbon atoms.

公开(公告)号：US20230357552A1

公开(公告)日：2023-11-09

申请号：US18024487

申请日：2021-08-31

Applicant: Zhiru MA ,  W. R. Grace & Co.-Conn.

Inventor： Zhiru MA

IPC: C08L23/32 ,  C08K5/52 ,  C08K5/12 ,  C08K5/13

CPC classification number: C08L23/32 ,  C08K5/12 ,  C08K5/13 ,  C08K5/52 ,  C08L2203/18 ,  C08L2205/242 ,  C08L2314/02

Abstract: Polymer compositions are disclosed that can be used to produce different types of molded articles, such as extruded piping structures. The polymer composition contains an oxidative stabilizing package. The oxidative stabilizing package contains at least one antioxidant, a nucleating agent, and an acid scavenger. The nucleating agent is a phosphate ester or a dicarboxylate metal salt. The stabilizing package of the present disclosure dramatically improves oxidation induction time.