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WO2009105070A1 - Articles en polyéthylène à masse moléculaire ultra-élevée - Google Patents

Articles en polyéthylène à masse moléculaire ultra-élevée Download PDF

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Publication number
WO2009105070A1
WO2009105070A1 PCT/US2008/002359 US2008002359W WO2009105070A1 WO 2009105070 A1 WO2009105070 A1 WO 2009105070A1 US 2008002359 W US2008002359 W US 2008002359W WO 2009105070 A1 WO2009105070 A1 WO 2009105070A1
Authority
WO
WIPO (PCT)
Prior art keywords
molecular weight
high molecular
ultra high
weight polyethylene
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2008/002359
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English (en)
Inventor
Stanley P. Dudek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/US2008/002359 priority Critical patent/WO2009105070A1/fr
Publication of WO2009105070A1 publication Critical patent/WO2009105070A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes

Definitions

  • This invention relates to the manufacture of articles from ultra high molecular weight polyethylene especially pipe.
  • a problem in the processing of ultra high molecular weight polyethylene from the powdered state is the speed of fusion of the ultra high molecular weight polyethylene.
  • the present invention obtains an article such as pipe from a pellet rather than a powder.
  • an olefin resin composition for injection molding which comprises (A) an olefin resin composition comprising ultra-high-molecular-weight polyethylene having an intrinsic viscosity of 10 to 40 dl/g as measured in decalin as the solvent at 135 ° C.
  • ultra-high-molecular-weight polyethylene having an intrinsic viscosity lower than that of the ultra-high-molecular-weight polyethylene, in which the ultra-high-molecular-weight polyethylene is present in an amount of 15 to 40% by weight based on the sum of both of the polyethylenes and the two polyethylenes as a whole have an intrinsic viscosity [.eta.] c of 3.5 to 15 dl/g and a melt torque T lower than 4.5 kg.cm, and (B) 1 to 70% by weight based on the olefin resin composition, of an additive selected from the group consisting of fine particulate inorganic fillers, fibrous fillers and liquid and solid lubricants.
  • 16 United States Patent 6,328,681 issued December 11 , 2001 , to Stephens, discloses industrial roll of the present invention comprises a substantially cylindrical core, an adhesive layer overlying the core, and a cover overlying the adhesive layer.
  • the cover comprises: a polymeric base layer overlying the adhesive layer; and a top stock layer overlying the base layer.
  • the top stock layer comprises a mixture of an elastomeric material and ultra high molecular weight polyethylene (UHMWPE), with the mixture including 100 parts elastomeric material by weight and between about 25 and 50 parts UHMWPE by weight.
  • UHMWPE ultra high molecular weight polyethylene
  • the roll can be formulated to a desired hardness within the desired 10 to 50 P&J hardness range while maintaining release properties suitable for papermaking in the papermaking environment 17
  • a method including forming a pseudo-gel of a semi-crystalline polymer material and a solvent.
  • the pseudo-gel is shaped into a first form and stretched. A portion of the solvent is removed to create a second form.
  • the second form is stretched into a microstructure including nodes interconnected by fibrils.
  • a method including forming a first form of a pseudo-gel including an ultra-high molecular weight polyethylene material and a solvent; stretching the first form; removing the solvent to form a second form; stretching the second form into a microstructure including nodes interconnected by fibrils; and annealing the stretched second form.
  • An apparatus including a body portion formed of a dimension suitable for a medical device application and including a polyolefin polymer including a node and a fibril microstructure.
  • a heat-curable composition comprising (I) at least one constituent whose molecule comprises on average (A) at least one functional group containing at least one bond which may be activated by means of heat and/or actinic radiation, and/or (B) at least one reactive functional group which is able to undergo thermal crosslinking reactions with groups of its own kind and/or with complementary reactive functional groups, with the proviso that there are always groups (A) and (B) in the composition; said constituent excluding the polyurethane dispersion synthesized from aliphatic polyisocyanates, compounds containing isocyanate-reactive functional groups and containing bonds that may be activated with actinic radiation, low molecular mass aliphatic compounds containing isocyanate-reactive functional groups, compounds containing isocyanate-reactive functional groups and dispersing functional groups, neutralizing agents for the dispersing functional groups, blocking agents for isocyanate groups
  • a component utilized by Masuda, et al. is UHMWPE. 23
  • the coating, bonding or sealing of primed or unprimed plastics parts is disclosed, for example, of ABS, AMMA, ASA, CA, CAB 1 EP, UF, CF, MF, MPF, PF, PAN, PA, PE, HDPE, LDPE, LLDPE, UHMWPE, PC, PC/PBT, PC/PA, PET, PMMA, PP 1 PS, SB, PUR, PVC, RF, SAN, PBT 1 PPE, POM, PUR-RIM, SMC, BMC, PP-EPDM and UP (abbreviations to DIN 7728P1 ).
  • Unfunctionalized and/or nonpolar substrate surfaces may be subjected to conventional pre-coating treatment, such as with a plasma or by a flaming, or may be given a water-based primer.
  • conventional pre-coating treatment such as with a plasma or by a flaming, or may be given a water-based primer.
  • 24 In United States Patent 7,037,970 issued Mehta, et al., to May 2, 2006, there is disclosed ethylene polymer composites, concentrates and a process utilized for their preparation are provided.
  • the composites of the invention have increased melt strength compared to the base resin and other improved physical characteristics.
  • the composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used. 25 Throughout the specification and claims, percentages and ratios are by weight temperatures are in degrees Celsius, and pressures are in Kpa gauge unless otherwise indicated.
  • the present invention describes a composition comprising a pellet of a thermoplastic rubber and an ultra high molecular weight polyethylene said composition having an MFR 250° C value at 2.5 Kg from 0.1 to 6 as measured by ASTM D1238. 28 The present invention also describes a composition comprising a pellet of a thermoplastic rubber and an ultra high molecular weight polyethylene said composition having a tensile strength as measured by ASTM D-638 of less than 2850 psi.
  • the present invention further describes a composition comprising a pellet of a thermoplastic rubber and an ultra high molecular weight polyethylene said composition having a tensile modulus as measured by ASTM D-638 of less than 110,000 psi.
  • the present invention also describes a composition comprising a pellet of a thermoplastic rubber and an ultra high molecular weight polyethylene said composition having a flexural modulus as measured by ASTM D-790 of less than 130,000 psi .
  • the compositions of the present invention provide an easy to use pellet that provides an end use product such as pipe having improved abrasion resistance. That is, when the pipe is employed in an environment where abrasive materials are present the pipe may be used for a significant period of time before it must be replaced.
  • compositions of the present invention behave as a thermoplastic thereby permitting melt processing to obtain an end use product rather than by compression processing.
  • ultra high molecular weight polyethylene has been processed into various shapes, such as blocks, rods, and sheet, by compression, molding or ram extrusion. This type of processing was required because the ultra high molecular weight polyethylene alone does not have flow characteristics, such as melt index, which other polymers exhibit 33 It has been suggested that materials such as oils, waxes and other lubricants can be compounded into ultra high molecular weight poly-ethylene to help it obtain flow characteristics.
  • ultra high molecular weight polyethylene lower the physical properties of the ultra high molecular weight polyethylene when these materials are used at a level that would allow a melt index to be measured.
  • the foregoing issues have essentially precluded the use of ultra high molecular weight polyethylene that is processed into a pellet that is then useful for injection molding or extrusion.
  • a processing aid has is included to permit extrusion processing and to speed the fusion of the ultra high molecular weight polyethylene.
  • the improved fusion characteristics permits the ultra high molecular weight polyethylene to be processed on standard plastic processing equipment such as single or twin screw extruders and injection molding machines.
  • Molded parts produced from the modified ultra high molecular weight polyethylene pellets of the present invention exhibit excellent abrasion resistance, an important characteristic that ultra high molecular weight polyethylene is known to exhibit in compression molding. 35
  • An objective of this invention is to show that ultra high molecular weight polyethylene may be processed with desirable flow characteristics without the need for oils, waxes, or lubricants. Furthermore, such an ultra high molecular weight polyethylene pellets may be processed on standard plastic compounding equipment such as injection molding machines and extruders to produce various shaped articles such as pipe. 1 DETAILED DESCRIPTION OF THE INVENTION
  • thermoplastic rubber component is preferably a propylene
  • thermoplastic rubber may also be a
  • thermoplastic When a propylene homopolymer is employed, the thermoplastic
  • I o rubber component preferably contains an amount of fraction insoluble
  • thermoplastic rubber component can have narrow to broad molecular
  • 19 preferably can range from 2 to 60.
  • thermoplastic rubber component as measured by ASTM D-790 of less
  • 22 flexural modulus is less than 120,000 psi.
  • thermoplastic rubber component is a thermoplastic rubber component
  • propylene polymer in particular a homopolymer, having a broad
  • thermoplastic rubber component with broad molecular weight distribution is used.
  • the above propylene polymers constituting the thermoplastic rubber compon-ent are well known in the art and commercially available. They can be prepared by using, for instance, the catalysts and polymerization processes described in the European patent No 45977.
  • the Ultra High Molecular Weight Polyethylene Component 43 The ultra high molecular weight polyethylene component is an ethylene homopolymer or a copolymer of ethylene containing 40% by weight or less, preferably 20% by weight or less of comonomers, selected in particular from alpha-olefins C 3 -Cio, as propylene, 1- butene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene. Other comonomers that can be present in the copolymer are dienes. 44 The ultra high molecular weight polyethylene has a molecular weight between 1 ,000,000 and 8,000,000 preferably having a molecular weight between 2,000,000 and 7,500,000.
  • thermoplastic rubber is present in a weight ratio to the ultra high molecular weight polyethylene at about 1 :50 to about 1 :5.
  • thermoplastic rubber is present in a weight ratio to the ultra high molecular weight polyethylene at about 1 :40 to about 1 :4.
  • an ultra high molecular weight polyethylene powder is blended with the thermoplastic rubber and extruded into pellets.
  • the pellets range are generally cylindrical in shape with a diameter of about 3/32 inch to about 5/32 inch with a length of 5/32 inch to 7/32 inch.
  • the pellet size is ideal for the processing as later described.
  • 48 Additional Components 49 Typically, many additional components may be utilized in the processing of the ultra high molecular weight polyethylene. Generally, any of the normally used components in the ultra high molecular weight polyethylene processing which do not materially interfere with the functioning of the system and the desired properties of the finished product may be employed. For instance, normally used components may be utilized herein at from 1 to 40 weight parts per 100 parts of the ultra high molecular weight polyethylene. Fillers and pigments may also be utilized herein typically at from 3 to 30 weight parts per 100 parts of the ultra high molecular weight polyethylene.
  • the extruded composition has an MFR 250° C value at 2.5 Kg from 0.1 to 6 as measured by ASTM D1238.
  • the extruded comp-osition has an MFR 250° C value at 2.5 Kg from 0.2 to 5.5 as measured by ASTM D1238.
  • the extruded composition has a tensile strength as measured by ASTM D-638 of less than 2850 psi.
  • the extruded composition has a tensile strength as measured by ASTM D-638 of about 2600 psi to about 2825 psi.
  • the extruded composition has a tensile modulus as measured by ASTM D-638 of less than 130,000 psi.
  • the extruded composition has a tensile modulus as measured by ASTM D-638 of less than 110,000 psi.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un procédé avantageux de traitement d'un polyéthylène à masse moléculaire ultra-élevée au cours d'un processus d'extrusion. Le polyéthylène à masse moléculaire ultra-élevée peut être façonné en tuyaux et autres articles utiles.
PCT/US2008/002359 2008-02-22 2008-02-22 Articles en polyéthylène à masse moléculaire ultra-élevée Ceased WO2009105070A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2008/002359 WO2009105070A1 (fr) 2008-02-22 2008-02-22 Articles en polyéthylène à masse moléculaire ultra-élevée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/002359 WO2009105070A1 (fr) 2008-02-22 2008-02-22 Articles en polyéthylène à masse moléculaire ultra-élevée

Publications (1)

Publication Number Publication Date
WO2009105070A1 true WO2009105070A1 (fr) 2009-08-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015184077A1 (fr) * 2014-05-29 2015-12-03 Ticona Llc Éléments composites de polyéthylène et leurs procédés de formation
CN110951145A (zh) * 2019-12-18 2020-04-03 大韩道恩高分子材料(上海)有限公司 一种注塑级超高分子量聚乙烯材料及其制备方法和应用
CN111117073A (zh) * 2020-01-09 2020-05-08 山东清河化工科技有限公司 一种共混式超高分子量聚丙烯/聚丙烯合金及其制备方法

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079287A (en) * 1987-11-05 1992-01-07 Mitsui Petrochemical Industries, Ltd. Olefin resin composition for injection molding
JPH06207051A (ja) * 1993-01-12 1994-07-26 Bridgestone Corp 防振ゴム組成物
US6328681B1 (en) * 1999-01-21 2001-12-11 Stowe Woodward Inc. Elastomeric roll cover with ultra high molecular weight polyethylene filler
US6521709B2 (en) * 1997-09-22 2003-02-18 Basell Poliolefine Italia S.P.A. Polyolefin compositions comprising a propylene polymer and UHMWPE
JP2003129037A (ja) * 2001-10-25 2003-05-08 Nippon Valqua Ind Ltd 水摺動シール用熱可塑性エラストマー組成物およびその用途
KR20030074306A (ko) * 2002-03-08 2003-09-19 티코나 게엠베하 탄성중합체 및 입자 형태가 불규칙한 고분자량폴리에틸렌을 포함하는 조성물, 이의 제조방법 및 이의 용도
US6790923B2 (en) * 2000-12-06 2004-09-14 Eidgenossische Technische Hochschule Zurich Melt-processible, wear resistant polyethylene
KR20050088113A (ko) * 2002-12-24 2005-09-01 바젤 폴리올레핀 게엠베하 대형 콘테이너를 위한 폴리에틸렌 취입 성형 조성물
KR20050088112A (ko) * 2002-12-24 2005-09-01 바젤 폴리올레핀 게엠베하 Ｌ-고리 드럼을 제조하기 위한 폴리에틸렌 조성물
KR20050088304A (ko) * 2002-12-24 2005-09-05 바젤 폴리올레핀 게엠베하 석유통 생산을 위한 폴리에틸렌 취입 성형 조성물
KR20050088310A (ko) * 2002-12-19 2005-09-05 바젤 폴리올레핀 게엠베하 소형 콘테이너 생산을 위한 폴리에틸렌 취입 성형 조성물
KR20070052783A (ko) * 2004-09-08 2007-05-22 네이셔널 굼미 에이비 열화학적인 처리 및 이로 인해 획득되는 비연속적인 코팅방법
US20080051515A1 (en) * 2006-08-22 2008-02-28 Dudek Stanley P Ultra high molecular weight polyethylene articles

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079287A (en) * 1987-11-05 1992-01-07 Mitsui Petrochemical Industries, Ltd. Olefin resin composition for injection molding
JPH06207051A (ja) * 1993-01-12 1994-07-26 Bridgestone Corp 防振ゴム組成物
US6521709B2 (en) * 1997-09-22 2003-02-18 Basell Poliolefine Italia S.P.A. Polyolefin compositions comprising a propylene polymer and UHMWPE
US6328681B1 (en) * 1999-01-21 2001-12-11 Stowe Woodward Inc. Elastomeric roll cover with ultra high molecular weight polyethylene filler
US6790923B2 (en) * 2000-12-06 2004-09-14 Eidgenossische Technische Hochschule Zurich Melt-processible, wear resistant polyethylene
JP2003129037A (ja) * 2001-10-25 2003-05-08 Nippon Valqua Ind Ltd 水摺動シール用熱可塑性エラストマー組成物およびその用途
KR20030074306A (ko) * 2002-03-08 2003-09-19 티코나 게엠베하 탄성중합체 및 입자 형태가 불규칙한 고분자량폴리에틸렌을 포함하는 조성물, 이의 제조방법 및 이의 용도
KR20050088310A (ko) * 2002-12-19 2005-09-05 바젤 폴리올레핀 게엠베하 소형 콘테이너 생산을 위한 폴리에틸렌 취입 성형 조성물
KR20050088113A (ko) * 2002-12-24 2005-09-01 바젤 폴리올레핀 게엠베하 대형 콘테이너를 위한 폴리에틸렌 취입 성형 조성물
KR20050088112A (ko) * 2002-12-24 2005-09-01 바젤 폴리올레핀 게엠베하 Ｌ-고리 드럼을 제조하기 위한 폴리에틸렌 조성물
KR20050088304A (ko) * 2002-12-24 2005-09-05 바젤 폴리올레핀 게엠베하 석유통 생산을 위한 폴리에틸렌 취입 성형 조성물
KR20070052783A (ko) * 2004-09-08 2007-05-22 네이셔널 굼미 에이비 열화학적인 처리 및 이로 인해 획득되는 비연속적인 코팅방법
US20080051515A1 (en) * 2006-08-22 2008-02-28 Dudek Stanley P Ultra high molecular weight polyethylene articles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015184077A1 (fr) * 2014-05-29 2015-12-03 Ticona Llc Éléments composites de polyéthylène et leurs procédés de formation
CN110951145A (zh) * 2019-12-18 2020-04-03 大韩道恩高分子材料(上海)有限公司 一种注塑级超高分子量聚乙烯材料及其制备方法和应用
CN110951145B (zh) * 2019-12-18 2022-09-09 大韩道恩高分子材料(上海)有限公司 一种注塑级超高分子量聚乙烯材料及其制备方法和应用
CN111117073A (zh) * 2020-01-09 2020-05-08 山东清河化工科技有限公司 一种共混式超高分子量聚丙烯/聚丙烯合金及其制备方法

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