SYNDIOTACTIC PROPYLENE POLYMER AND LUBRICANT CONTAINING SAME

• Main Authors: LIEHPAO O FARNG, DIAS ANTHONY J, JO ANN M CANICH, GEORGE RODRIGUEZ, JEAN-ROCH SCHAUDER
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; FUELS; LUBRICANTS; LUBRICATING COMPOSITIONS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

To provide a lubricant having good viscometric property and high thickening efficiency.SOLUTION: The invention relates to a syndiotactic polymer containing a unit derived from propylene and a unit derived from C-Calpha olefin. The polymer is prepared by slurry or solution polymerization process using a zirconium-containing metallocene catalyst system. The polymer has a melt flow rate of approximately 0.1 to approximately 20 g/10 min measured in accordance with ASTM D-1238 (230°C, 2.16 kg). The syndiotactic polymer is useful as a viscosity index improver.SELECTED DRAWING: None 【課題】良好な粘度特性、高い増粘効率を有する潤滑油の提供。【解決手段】プロピレン由来単位およびＣ４〜Ｃ２０アルファオレフィン由来単位を含むシンジオタクチックポリマーに関する。ポリマーはジルコニウム含有メタロセン触媒系を使用してスラリーまたは溶液重合プロセスで調製される。ポリマーは約０．１〜約２０ｇ／１０分の、ＡＳＴＭ Ｄ−１２３８（２３０℃、２．１６ｋｇ）によって測定されたメルトフローレートを有する。シンジオタクチックポリマーは粘度指数向上剤として有用である。【選択図】なし