PREPARATION OF ULTRAHIGH MOLECULAR WEIGHT ETHYLENE COPOLYMER

• Main Authors: ROMAIN BERTHOUD, JOHN RICHARD SEVERN, TIMOTHY JAMES KIDD
• Format: Patent
• Language: English; Japanese
• Published: 14.11.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a particulate ultrahigh molecular weight polyethylene suitable for manufacture of molded articles with improved mechanical and/or optical properties.SOLUTION: A particulate ultrahigh molecular weight polyethylene (pUHMWPE) has an intrinsic viscosity (IV) of at least 4 dl/g, a comonomer content of at least 0.05 SCB/1000TC, a comonomer partition factor (Cpf) of at least 0.8, a median particle size D50 between 50 and 500 μm, and a total ash content less than 1000 ppm.SELECTED DRAWING: None 【課題】改善された機械的性質および／または光学的性質を有する成形物品の製造に好適な粒子状超高分子量ポリエチレンの提供。【解決手段】少なくとも４ｄｌ／ｇの固有粘度（ＩＶ）、少なくとも０．０５ＳＣＢ／１０００ＴＣのコモノマー含有量、少なくとも０．８のコモノマー分配係数（Ｃｐｆ）、５０〜５００μｍの間のメジアン粒径Ｄ５０、１０００ｐｐｍ未満の総灰分を有する粒子状超高分子量ポリエチレン（ｐＵＨＭＷＰＥ）。【選択図】なし