WO1994028064A1 - Elastic polyethylene compositions - Google Patents
Elastic polyethylene compositions Download PDFInfo
- Publication number
- WO1994028064A1 WO1994028064A1 PCT/EP1994/001639 EP9401639W WO9428064A1 WO 1994028064 A1 WO1994028064 A1 WO 1994028064A1 EP 9401639 W EP9401639 W EP 9401639W WO 9428064 A1 WO9428064 A1 WO 9428064A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- polyethylene
- density
- low density
- molecular weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
Definitions
- This invention relates to polyethylene blend compositions comprising one or more of conventional ' polyethylene polymers or copolymers, with additionally, high molecular weight polyethylene ( w greater than 1.5xl0 6 ), the blend compositions exhibiting enhanced elastic properties.
- the level of elasticity in polyethylene films is a critical property for both of film production speed and coating speed.
- the bubble stability is controlled by the elasticity of the (partially melted) film as it is being stretched, cooled and picked up by the chill and take-up rolls.
- the elastic properties are important in molding applications for both of processing and composition final properties.
- polyethylene blends comprising both of high M w polyethylene and one or more conventional polyethylene polymers or copolymers are known- in the patent art, typically for injection molding compositions. This is because ultrahigh molecular weight polyethylenes are known to have exceptional abrasion and impact resistance.
- molded polyethylene compositions JP-A-59-232164, disclosed the use of A) 50 - 15 parts superhigh molecular weight polyethylene, having an intrinsic viscosity [ ⁇ ] in decalin at 135°C of at least 5 dl/g and a density of 0.930 g/cm ⁇ or more, and b) 50 - 85 parts high-density polyethylene, having a density of 0.950 or more and and MFR of 0.1-500 g/lOmin, for the purpose of providing a latent-heat-type thermal energy material said to show excellent shape retention when being melted.
- the methods of production are said to include both i) mixing with melt-kneading and extrusion into pellets, strands, films, sheets, or nets and b) mixing with forming into strands or sheets by an injection or compression process.
- US-A-4 792 588 describes ethylene compositions said to have excellent melt moldability comprising 20 - 95 wt.% ultrahigh-molecular-weight polyethylene with molecular weight of at least 1,650,000 and 80 - 5 wt.% of a low- molecular-weight to high molecular-weight polyethylene of about 1500 to about 360,000.
- the compositions are produced by a multi-stage, multi-reactor process. The mechanical properties of high impact resistance or strength and tensile strength of the ultrahigh-molecular-weight polyethylene is said to be retained. Molded products are described, including molded sheets of 2 - 5 mm. thickness.
- the high weight-average molecular-weight polyethylene (HMWPE) of the invention are those polyethylenes which have a M w greater than or equal to about 1.5 x 10°. Included are the ultrahigh molecular-weight (“UHM ”) polyethylenes defined by the ASTM as those linear polyethylenes which have a relative viscosity of 2.3 or greater, at a solution concentration of 0.05%, at 135°C, in decahydronaphthalene. Typically HDPE has molecular weights in the range of 100,000 to 200,000, and HMW HDPE has molecular weights in the range of 300,000 to 500,000 (see below).
- the high molecular weight homopolymer polyethylene of the invention is substantially higher in M w , and will typically be on the order of 1.5 x 10 6 , or higher. Commercial grades are available from 3 x 10° to 6 x 10° " , normally in powder form.
- the HMWPE can be prepared by any of radical polymerization of ethylene under high pressure, coordination polymerization of ethylene, and polymerization of ethylene with supported metal-oxide catalysts, preferably and, generally commercially, by means of the latter two. Additional background information on UHMW appears in the technical literature, see e.g., Ency. of Poly. Sci. and Eng., vol. 6, pp. 490-494 and 383-490 (J.
- conventional polyethylene polymers includes one or more of ultralow-density ("ULDPE”), very low density
- VLDPE low density polyethylene
- LLDPE low density polyethylene
- HDPE high density polyethylene
- HMW HDPE high molecular weight high-density
- the polyethylene copolymers typically are those of ethylene with at least one alphaolefin having at least three carbon atoms, e.g., propylene, 1-butene, 1-hexene, 1-octene, etc. Additionally these blends will encompass any of the polyethylene polymers and blends emerging from new technologies relating to rr.etallocene coordination catalysis, such as those exemplified in PCT-A-WO 90/03414.
- the disclosures addressing polyolefins and blends thereof in U.S. application number U.S. application Ser. No. 252,094 filed 30 September 1988 and U.S. application Ser. No. 07/817,701 filed 7 January 1992 are incorporated by reference for purposes of U.S. patent practice.
- the invention blends comprise from 0.1 to 40 wt.% based upon the total polymer weight, more particularly 2 to less than 40 wt.% of the HMWPE of the invention.
- the complement will comprise the conventional polyethylene polymers or copolymers.
- additives such as reinforcing fillers, pigments or colorants, UV stabilizers, antioxidants, anti- block or slip agents, etc., can be provided in conventional amounts in accordance with conventional methods to achieve specifically desired end properties. Such additives can be added in any order convenient prior to or during melt blending of the blends.
- Blends of the invention are prepared by blending the described components in the desired proportions using either conventional solution or melt processing techniques and apparatus for example, solution-melt extruders, Banbury mixers, single or multiple screw extruders and the like.
- the ultra high molecular weight polyethylene by itself is known to be be difficult to process via conventional polyethylene processing techniques. However it can be successfully processed by a newly developed but well established technique called gel spinning. Exceptionally high strength highly extended polyethylene fibers are produced by this technique.
- they are processed m the solid-state by sintering and extrusion, a technique analogous to injection extrusion processes used for manufacturing pipes or plastics or ceramics. The techniques are known to those familiar with field of polyolefin processing.
- blends may be made by direct polymerization, using, for example, two or more catalysts in a single reactor or one or more catalysts in parallel or series reactors, where the catalysts, monomer feeds, and reactor conditions are provided that are suitable for the preparation of polymer components meeting the invention description.
- direct polymerization blends are well- known in the polyolefin art, see e.g., US-A-4 792 588.
- Mr/Mj- ⁇ the ratio of the molecular weight of conventional and high molecular weight polyethylene
- Mr , /Mj_, where Mjj is the molecular weight of UHMWPE and Mr. is the conventional polyethylene is such that M ⁇ /Mr. > 1/ more preferably M ⁇ /Mr. > 10 and most preferably > 25.
- M ⁇ in examples 2-10 below is about 2,000,000 and M c is 60,000.
- MH/MQ is about 35.
- Typical industrial applications for the blends of the invention are the field of polyolefin films, especially in thin guage films where strength and elasticity are important to fast processing.
- the blends exhibit excellent bubble stability and fast drawdowns during film blowing operations.
- All of unoriented and singly, or doubly, oriented packaging films for such end-use as food, health care or consumer articles enclosures can be prepared from the blends of this invention in accordance with conventional knowledge in the field.
- the invention blends are suitable for injection molding purposes. Items that are normally injection molded such as mechanical goods, household utensils, toys, etc. which use polyethylenes as such or polyethylene compositions incorporating polypropylene and/or ethylene-propylene copolymers, can be made from the disclosed compositions described in this invention.
- Examples 1 to 11 - Invention blend compositions of a commercial high density polyethylene (HDPE - 6950 YN, a product of Exxon Chemical Co., U.S.A.) and a commercial high density and ultrahigh molecular weight polyethylene (GUR-412 - Lot CM 331584, Hoechst Aktiengesellschaft, DE) were madeT
- the weight-average molecular weight of the former as determined by GPC (gel permeation chromatography) was 62,000 and its Mw/Mn ratio about 4.6. Its melting temperature determined from DSC @ 10°C/min was found to be 137.
- Example 12 For illustrative and comparison purposes, polyethylene blends incorporating long chains were also made by melt mixing. Generally speaking, the melt mixing and processing of very high molecular weight is not readily feasible at the conventional temperatures and torques available in laboratory scale units such as Brabender extruder. However, compositions containing up to 5 wt % of the UHMWPE were found to be capable of effective mixing and thus melt mixed in a Brabender mixer at 240°C. These were subsequently extruded in the form of strip using a rectangular die of opening of 25 mm in width and 2.5 mm in thickness. A Haake model PL-2000-6 single-screw extruder with four heating zones each set nominally at 220°C was used.
- Examples 13 to 19 Mechanical data evaluated for of blends of linear low density polyethylene with high molecular weight polyethylene are exemplified in Table-2.
- the SLP-4-2219 is a linear copolymer of ethylene and butene. Its weight average molecular weight was ' about 26,000 and Mw/Mn ⁇ 2.0, butene content ⁇ 8.7 wt % and density of about 0.91 (g/cn ) .
- DSC measurement provided a Tm value of about 103. °C.
- Blend preparation and testing was as described for Examples 1 to 11. For this series of blends M /Mr , was about 75. Table -2
- compositions containing less than about 5 wt.% high molecular weight species dramatically enhanced the elongational properties of SLP-4-2219.
- HMWPE tensile strength (stress at break) and elongation at break increase.
- the former by about 30 "-- and the latter by more than 800 %, respectively.
- Examples 20 and 21 - Mechanical data evaluated for of blends of another linear low density polyethylene with the HMWPE of Examples 13 to 20 are exemplified in Table-3.
- DSC measurement provided a Tm value of about 91°C.
- Blend preparation and testing was as described for Examples 1 to 11. For this series of blends M ⁇ /Mr- was about 25. Table-3
- Table-3 illustrates the significant enhancement of elongation when of another LLDPE-based composition contains the HMWPE as described for the invention, and as well an improved stress at break from the value to be expected from a linear contribution from the respective components.
- Examples 22 and 23 - Mechanical data evaluated for a blend of a commercial low density polyethylene with the HMWPE of Examples 13 to 20 are exemplified in Table-4.
- Blend preparation and testing was as described for Examples 1 to 11. For this series of blends M ⁇ /Mr , was about 27.
- Table-4 illustrates the significant enhancement of elongation when an LDPE-based composition contains the
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94918348A EP0699218A1 (en) | 1993-05-21 | 1994-05-16 | Elastic polyethylene compositions |
JP7500195A JPH09500919A (en) | 1993-05-21 | 1994-05-16 | Elastic polyethylene composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB939310559A GB9310559D0 (en) | 1993-05-21 | 1993-05-21 | Elastic polyethylene compositions |
GB9310559.1 | 1993-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994028064A1 true WO1994028064A1 (en) | 1994-12-08 |
Family
ID=10735929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001639 WO1994028064A1 (en) | 1993-05-21 | 1994-05-16 | Elastic polyethylene compositions |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0699218A1 (en) |
JP (1) | JPH09500919A (en) |
CA (1) | CA2161093A1 (en) |
GB (1) | GB9310559D0 (en) |
WO (1) | WO1994028064A1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5472775A (en) * | 1993-08-17 | 1995-12-05 | The Dow Chemical Company | Elastic materials and articles therefrom |
US5562958A (en) * | 1991-10-15 | 1996-10-08 | The Dow Chemical Company | Packaging and wrapping film |
US5589561A (en) * | 1989-06-27 | 1996-12-31 | The Dow Chemical Company | Bioriented blown film |
US5681523A (en) * | 1994-05-09 | 1997-10-28 | The Dow Chemical Company | Medium modulus polyethylene film and fabrication method |
US5773155A (en) * | 1991-10-15 | 1998-06-30 | The Dow Chemical Company | Extrusion compositions having high drawdown and substantially reduced neck-in |
US5858515A (en) * | 1995-12-29 | 1999-01-12 | Kimberly-Clark Worldwide, Inc. | Pattern-unbonded nonwoven web and process for making the same |
EP0908400A1 (en) * | 1997-10-13 | 1999-04-14 | Rockwool International A/S | Packaged mineral wool products |
US6680265B1 (en) | 1999-02-22 | 2004-01-20 | Kimberly-Clark Worldwide, Inc. | Laminates of elastomeric and non-elastomeric polyolefin blend materials |
EP1605000A1 (en) * | 2003-03-10 | 2005-12-14 | Asahi Kasei Chemicals Corporation | Ultrahigh-molecular ethylene polymer |
WO2013060736A1 (en) | 2011-10-26 | 2013-05-02 | Borealis Ag | Process |
WO2013139784A1 (en) * | 2012-03-20 | 2013-09-26 | Dsm Ip Assets B.V. | Polyolefin fiber |
WO2014054055A2 (en) | 2012-10-05 | 2014-04-10 | Reliance Industries Limited | A polymer composition and a process for preparing the same |
EP2743305A1 (en) | 2012-12-17 | 2014-06-18 | Borealis AG | Process for the preparation of a high density polyethylene blend |
EP2799487A1 (en) | 2013-05-01 | 2014-11-05 | Borealis AG | Composition |
US9045569B2 (en) | 2011-01-14 | 2015-06-02 | W. R. Grace & Co.-Conn. | Process of making modified metallocene catalyst, catalyst produced and use thereof |
EP2907843A1 (en) | 2014-02-13 | 2015-08-19 | Borealis AG | Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties |
US20170349678A1 (en) * | 2014-12-22 | 2017-12-07 | Borealis Ag | Process for producing multimodal polyethylene blends including ultra-high molecular weight components |
WO2017220558A1 (en) | 2016-06-22 | 2017-12-28 | Borealis Ag | Polymer composition and a process for production of the polymer composition |
EP3293208A1 (en) * | 2016-09-12 | 2018-03-14 | Thai Polyethylene Co., Ltd. | Bimodal polyethylene composition and pipe comprising the same |
WO2018095772A2 (en) | 2016-11-25 | 2018-05-31 | Borealis Ag | New composition and process |
EP3418330A1 (en) | 2017-06-21 | 2018-12-26 | Borealis AG | Polymer composition and a process for production of the polymer composition |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0811936B8 (en) * | 2007-05-23 | 2021-07-27 | Dsm Ip Assests Bv | suture containing ultra high molecular weight polyethylene filaments (uhm wpe) and use of the suture |
JP2011208162A (en) * | 2011-07-26 | 2011-10-20 | Sumitomo Chemical Co Ltd | Polyolefin resin film and composition for manufacturing polyolefin resin film |
EP4282651A1 (en) * | 2021-01-21 | 2023-11-29 | Fujimori Kogyo Co., Ltd. | Layered film and packaging bag |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0230750A2 (en) * | 1985-12-17 | 1987-08-05 | Nippon Oil Co. Ltd. | Easily soluble polyethylene powder for the preparation of fibers or films having high strength and high elastic modulus |
EP0273284A2 (en) * | 1986-12-18 | 1988-07-06 | Nippon Oil Co., Ltd. | Polyethylene composition |
-
1993
- 1993-05-21 GB GB939310559A patent/GB9310559D0/en active Pending
-
1994
- 1994-05-16 WO PCT/EP1994/001639 patent/WO1994028064A1/en not_active Application Discontinuation
- 1994-05-16 EP EP94918348A patent/EP0699218A1/en not_active Withdrawn
- 1994-05-16 CA CA 2161093 patent/CA2161093A1/en not_active Abandoned
- 1994-05-16 JP JP7500195A patent/JPH09500919A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0230750A2 (en) * | 1985-12-17 | 1987-08-05 | Nippon Oil Co. Ltd. | Easily soluble polyethylene powder for the preparation of fibers or films having high strength and high elastic modulus |
EP0273284A2 (en) * | 1986-12-18 | 1988-07-06 | Nippon Oil Co., Ltd. | Polyethylene composition |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5589561A (en) * | 1989-06-27 | 1996-12-31 | The Dow Chemical Company | Bioriented blown film |
US5562958A (en) * | 1991-10-15 | 1996-10-08 | The Dow Chemical Company | Packaging and wrapping film |
US5773155A (en) * | 1991-10-15 | 1998-06-30 | The Dow Chemical Company | Extrusion compositions having high drawdown and substantially reduced neck-in |
US5863665A (en) * | 1991-10-15 | 1999-01-26 | The Dow Chemical Company | Extrusion compositions having high drawdown and substantially reduced neck-in |
US5472775A (en) * | 1993-08-17 | 1995-12-05 | The Dow Chemical Company | Elastic materials and articles therefrom |
US5681523A (en) * | 1994-05-09 | 1997-10-28 | The Dow Chemical Company | Medium modulus polyethylene film and fabrication method |
US5858515A (en) * | 1995-12-29 | 1999-01-12 | Kimberly-Clark Worldwide, Inc. | Pattern-unbonded nonwoven web and process for making the same |
EP0908400A1 (en) * | 1997-10-13 | 1999-04-14 | Rockwool International A/S | Packaged mineral wool products |
US8314040B2 (en) | 1999-02-22 | 2012-11-20 | Kimberly-Clark Worldwide, Inc. | Laminates of elastomeric and non-elastomeric polyolefin blend materials |
US6680265B1 (en) | 1999-02-22 | 2004-01-20 | Kimberly-Clark Worldwide, Inc. | Laminates of elastomeric and non-elastomeric polyolefin blend materials |
EP1605000A4 (en) * | 2003-03-10 | 2008-04-02 | Asahi Kasei Chemicals Corp | Ultrahigh-molecular ethylene polymer |
EP1605000A1 (en) * | 2003-03-10 | 2005-12-14 | Asahi Kasei Chemicals Corporation | Ultrahigh-molecular ethylene polymer |
US9045569B2 (en) | 2011-01-14 | 2015-06-02 | W. R. Grace & Co.-Conn. | Process of making modified metallocene catalyst, catalyst produced and use thereof |
WO2013060736A1 (en) | 2011-10-26 | 2013-05-02 | Borealis Ag | Process |
EA030165B1 (en) * | 2012-03-20 | 2018-06-29 | ДСМ АйПи АССЕТС Б.В. | Gel-spun fiber, process for manufacturing same and article |
WO2013139784A1 (en) * | 2012-03-20 | 2013-09-26 | Dsm Ip Assets B.V. | Polyolefin fiber |
CN104204066A (en) * | 2012-03-20 | 2014-12-10 | 帝斯曼知识产权资产管理有限公司 | Polyolefin fiber |
WO2014054055A2 (en) | 2012-10-05 | 2014-04-10 | Reliance Industries Limited | A polymer composition and a process for preparing the same |
KR101936456B1 (en) | 2012-10-05 | 2019-01-08 | 릴라이언스 인더스트리즈 리미티드 | Polymer composition and a process for preparing the same |
US9512307B2 (en) | 2012-10-05 | 2016-12-06 | Reliance Industries Limited | Polymer composition and a process for preparing the same |
EP2743305A1 (en) | 2012-12-17 | 2014-06-18 | Borealis AG | Process for the preparation of a high density polyethylene blend |
EP2799487A1 (en) | 2013-05-01 | 2014-11-05 | Borealis AG | Composition |
US9783661B2 (en) | 2014-02-13 | 2017-10-10 | Borealis Ag | Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties |
EP2907843A1 (en) | 2014-02-13 | 2015-08-19 | Borealis AG | Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties |
US20170349678A1 (en) * | 2014-12-22 | 2017-12-07 | Borealis Ag | Process for producing multimodal polyethylene blends including ultra-high molecular weight components |
US10597470B2 (en) * | 2014-12-22 | 2020-03-24 | Borealis Ag | Process for producing multimodal polyethylene blends including ultra-high molecular weight components |
WO2017220558A1 (en) | 2016-06-22 | 2017-12-28 | Borealis Ag | Polymer composition and a process for production of the polymer composition |
EP3293208A1 (en) * | 2016-09-12 | 2018-03-14 | Thai Polyethylene Co., Ltd. | Bimodal polyethylene composition and pipe comprising the same |
WO2018095772A2 (en) | 2016-11-25 | 2018-05-31 | Borealis Ag | New composition and process |
US11427670B2 (en) | 2016-11-25 | 2022-08-30 | Borealis Ag | Composition and process |
EP3418330A1 (en) | 2017-06-21 | 2018-12-26 | Borealis AG | Polymer composition and a process for production of the polymer composition |
WO2018234110A1 (en) | 2017-06-21 | 2018-12-27 | Borealis Ag | Polymer composition and a process for production of the polymer composition |
US11254809B2 (en) | 2017-06-21 | 2022-02-22 | Borealis Ag | Polymer composition and a process for production of the polymer composition |
Also Published As
Publication number | Publication date |
---|---|
GB9310559D0 (en) | 1993-07-07 |
EP0699218A1 (en) | 1996-03-06 |
JPH09500919A (en) | 1997-01-28 |
CA2161093A1 (en) | 1994-12-08 |
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