TW200720353A - The flare-retarded resin composition, and the cable and the insulating tube those use it - Google Patents

The flare-retarded resin composition, and the cable and the insulating tube those use it

Info

Publication number
TW200720353A
TW200720353A TW095133147A TW95133147A TW200720353A TW 200720353 A TW200720353 A TW 200720353A TW 095133147 A TW095133147 A TW 095133147A TW 95133147 A TW95133147 A TW 95133147A TW 200720353 A TW200720353 A TW 200720353A
Authority
TW
Taiwan
Prior art keywords
flare
resin composition
retarded resin
cable
insulating tube
Prior art date
Application number
TW095133147A
Other languages
English (en)
Inventor
Kiyoaki Moriuchi
Hiroshi Hayami
Original Assignee
Sumitomo Electric Industries
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 Sumitomo Electric Industries filed Critical Sumitomo Electric Industries
Publication of TW200720353A publication Critical patent/TW200720353A/zh

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • 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
    • 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
    • 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
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • 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
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/14—Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
    • C08L2666/18—Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
  • Insulated Conductors (AREA)
  • Insulating Bodies (AREA)
  • Inorganic Insulating Materials (AREA)
  • Laminated Bodies (AREA)
TW095133147A 2005-09-09 2006-09-08 The flare-retarded resin composition, and the cable and the insulating tube those use it TW200720353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005261486 2005-09-09

Publications (1)

Publication Number Publication Date
TW200720353A true TW200720353A (en) 2007-06-01

Family

ID=37835947

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095133147A TW200720353A (en) 2005-09-09 2006-09-08 The flare-retarded resin composition, and the cable and the insulating tube those use it

Country Status (9)

Country Link
US (1) US20090130356A1 (zh)
EP (1) EP1923429B1 (zh)
JP (1) JPWO2007029833A1 (zh)
KR (1) KR101351717B1 (zh)
CN (1) CN101258200B (zh)
CA (1) CA2621516A1 (zh)
MY (1) MY155200A (zh)
TW (1) TW200720353A (zh)
WO (1) WO2007029833A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI386451B (zh) * 2009-05-12 2013-02-21 Nanya Plastics Corp 一種ｐｖｃ樹脂組成物及其製品
TWI413133B (zh) * 2010-12-30 2013-10-21 Hong Tai Electric Ind Co Ltd 電動車電源纜線之包覆層及電動車電源纜線

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009093900A (ja) * 2007-10-05 2009-04-30 Sumitomo Electric Ind Ltd 多芯フラット絶縁電線およびその製造方法
JP5468944B2 (ja) 2010-03-12 2014-04-09 矢崎総業株式会社 押出しフレキシブルフラットケーブル
ES2396624T3 (es) * 2010-07-30 2013-02-22 Nexans Mezcla polímera reticulada para cubiertas de cables y conductos
SG189397A1 (en) * 2010-10-13 2013-05-31 Teijin Ltd Resin composition for wire coating and insulated wire comprising the same
CN102206449B (zh) * 2011-05-05 2016-05-11 湖南工业大学 一种改善膨胀型醋丙防火涂料垂流的新方法
JP5896626B2 (ja) * 2011-06-08 2016-03-30 リケンテクノス株式会社 シラン架橋性難燃ポリオレフィンとシラノール触媒樹脂組成物からなる電線成形体の製造方法
JP5891844B2 (ja) * 2012-02-24 2016-03-23 住友電気工業株式会社 絶縁フィルム及びそれを用いたフラットケーブル
JP5652452B2 (ja) * 2012-09-27 2015-01-14 日立金属株式会社 ノンハロゲン難燃性絶縁電線
JP2015000913A (ja) * 2013-06-14 2015-01-05 日立金属株式会社 ノンハロゲン難燃性樹脂組成物、並びにこれを用いた電線及びケーブル
FR3009562B1 (fr) * 2013-08-06 2017-12-08 Arkema France Compositions thermoplastiques ignifugees souples a haute tenue thermomecanique, en particulier pour les cables electriques.
EP3050921B1 (en) * 2013-09-27 2019-11-06 Furukawa Electric Co., Ltd. Heat-resistant silane cross-linked resin molded body and production method for same, heat-resistant silane cross-linking resin composition and production method for same, silane masterbatch, and heat-resistant product employing heat-resistant silane cross-linked resin molded body
CN104177699A (zh) * 2014-05-29 2014-12-03 安徽海纳川塑业科技有限公司 一种防漏电套管
WO2016073862A2 (en) * 2014-11-07 2016-05-12 Cable Components Group, Llc Compositions for compounding, extrusion and melt processing of foamable and cellular halogen-free polymers
US10031301B2 (en) 2014-11-07 2018-07-24 Cable Components Group, Llc Compositions for compounding, extrusion, and melt processing of foamable and cellular polymers
US10515740B2 (en) * 2017-07-11 2019-12-24 3M Innovative Properties Company Flame-retardant flat electrical cable
KR102114541B1 (ko) * 2018-02-28 2020-05-25 한국전력공사 화재 확산 방지 시스템
JP2021152367A (ja) * 2018-07-12 2021-09-30 住友電気工業株式会社 金属管加飾用熱収縮チューブ、加飾金属管及び加飾金属管の製造方法
CA3174259A1 (en) * 2020-07-01 2022-01-06 Krischan JELTSCH Heat and oil resistant compositions
CN112226049B (zh) * 2020-10-19 2023-07-21 禾创高分子技术(广东)有限公司 一种阻燃耐油防霉弹性体热缩管料及其母粒的制备方法
CN114773719A (zh) * 2022-03-28 2022-07-22 金发科技股份有限公司 一种聚烯烃材料及其制备方法和应用

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265880A (en) * 1975-11-27 1977-05-31 Toray Industries Wiry covered metal structure
DE3831243A1 (de) * 1988-09-14 1990-03-22 Basf Ag Schlagzaehe polyester- und polyamidformmassen
JP3456595B2 (ja) * 1994-01-19 2003-10-14 住友電気工業株式会社 難燃性樹脂組成物及びそれを用いた電線、フラットケーブル、チューブ
JP3367271B2 (ja) * 1995-02-02 2003-01-14 三菱化学株式会社 ポリエステル樹脂組成物およびシート
JP2000080223A (ja) * 1998-09-04 2000-03-21 Unitika Ltd 熱可塑性ポリエステル樹脂組成物及びその製造方法
JP2001316571A (ja) * 2000-05-02 2001-11-16 Kureha Elastomer Co Ltd 熱可塑性エラストマ組成物およびそれを用いたゴルフボール
JP2002080813A (ja) * 2000-06-27 2002-03-22 Tokai Rubber Ind Ltd 接着剤組成物およびそれを用いたフラットケーブル用絶縁テープ
JP2002358837A (ja) * 2001-06-01 2002-12-13 Teijin Ltd フラットケーブルおよび被覆用ポリエステル樹脂組成物
JP2003055651A (ja) * 2001-08-10 2003-02-26 Tdk Corp 蛍光体薄膜およびｅｌパネル
JP2003335904A (ja) * 2002-05-23 2003-11-28 Fukusuke Kogyo Co Ltd ガス透過性に優れた包装用フィルム及びその製造方法
JP3977152B2 (ja) * 2002-06-10 2007-09-19 古河電気工業株式会社 光ファイバ心線、光ファイバコード、および光ファイバケーブル
US7011883B2 (en) * 2002-08-30 2006-03-14 Ishida Co., Ltd. Display strip
JP2004359836A (ja) * 2003-06-05 2004-12-24 Fujikura Ltd 難燃性接着混和物
JP2004006376A (ja) * 2003-06-13 2004-01-08 Sumitomo Electric Ind Ltd 難燃性樹脂組成物を用いた電線、フラットケーブル、チューブ
US7241838B2 (en) * 2003-12-19 2007-07-10 Eastman Chemical Company Blends of aliphatic-aromatic copolyesters with ethylene-vinyl acetate copolymers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI386451B (zh) * 2009-05-12 2013-02-21 Nanya Plastics Corp 一種ｐｖｃ樹脂組成物及其製品
TWI413133B (zh) * 2010-12-30 2013-10-21 Hong Tai Electric Ind Co Ltd 電動車電源纜線之包覆層及電動車電源纜線

Also Published As

Publication number Publication date
EP1923429B1 (en) 2013-04-17
US20090130356A1 (en) 2009-05-21
JPWO2007029833A1 (ja) 2009-03-19
KR20080049032A (ko) 2008-06-03
KR101351717B1 (ko) 2014-01-14
WO2007029833A1 (ja) 2007-03-15
MY155200A (en) 2015-09-15
EP1923429A4 (en) 2010-09-01
CA2621516A1 (en) 2007-03-15
CN101258200A (zh) 2008-09-03
CN101258200B (zh) 2012-12-05
EP1923429A1 (en) 2008-05-21

Similar Documents

Publication Publication Date Title
TW200720353A (en) The flare-retarded resin composition, and the cable and the insulating tube those use it
TW200732397A (en) Foam
WO2007130315A8 (en) Aerogel/polymer composite materials
EP2231777B8 (en) Chemical and impact resistant thermoplastic resin composition having improved extrudability.
EP1953193A4 (en) FLAME RESISTANT RESIN COMPOSITION AND ISOLATED WIRE THEREFORE MADE, THEREFORE MANUFACTURED INSULATED SHIELDED WIRE, INSULATED CABLE MANUFACTURED, AND ISOLATED HOSE THEREFORE MADE
WO2007076146A3 (en) Compositions comprising novel copolymers and electronic devices made with such compositions
EP2113532A4 (en) RESIN COMPOSITION AND MOLDED ARTICLE OBTAINED FROM THE COMPOSITION
ZA200808655B (en) A layer for cables having improved stress whitening resistance
WO2004044049A3 (en) Fire resistant intumescent thermoplastic or thermoset compositions
CL2013002249A1 (es) Composicion de revestimiento con resistencia reforzada a la hidrólisis que comprende un silicio y una resina de revestimiento.
HK1130277A1 (en) Resin composition, prepreg and laminate using the same
EP2103641A4 (en) POLYAMIDE-IMIDE RESIN, CLEAR COLORLESS FLEXIBLE METALLIC LAMINATE MADE THEREOF, AND CIRCUIT-CIRCUIT BOARD
EP2046890A4 (en) EXPANDABLE COMPOSITIONS BASED ON EPOXY RESINS AND POLYESTERS
WO2007146382A3 (en) Hydrophobic compositions for electronic applications
EP1942173A4 (en) FLAMEHAMMER, FLAME-RESISTANT RESIN COMPOSITION AND FORM BODY
WO2007079103A3 (en) Compositions comprising novel compounds and electronic devices made with such compositions
DE502007003236D1 (de) Rohrförmiges formteil
BRPI0911753A2 (pt) resinas epóxi e materiais de compósito com propriedades de queima melhoradas.
GB2454369B (en) Flameproof copolymer and flame retardant thermoplastic resin composition using thereof
EP1966304A4 (en) FLAME-RESISTANT THERMOPLASTIC COMPOSITION
EP1818321A3 (en) Inorganic fiber article
DE602007004558D1 (de) Kratzbeständige, flammhemmende thermoplastische Harzzusammensetzung
UA101268C2 (ru) Многослойное покрытие поверхности с барьерным слоем
EP1820638A4 (en) CHROMATE-FREE RESIN COMPOSITE DAMPER MATERIAL PROVIDING EXCELLENT LONG-TERM ADHESION
ZA200809414B (en) Flame retardant polymer composition comprising polyolefin with high molecular weight distribution