LUBRICATING OIL COMPOSITION WITH VISCOSITY MODIFIER BASED ON SYNDIOTACTIC PROPYLENE-BASED ETHYLENE-PROPYLENE COPOLYMERS WITH IMPROVED PROPERTIES

Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20 % by weight of ethylene, b) 80 to 98 % by weight of propylene;...

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Bibliographische Detailangaben
Hauptverfasser:	JIANG, PEIJUN, MATTLER, SARAH J, PATEL, PRITESH ARJUNBHAI, ZHANG, SARA YUE, MORGAN, DAVID L, KANG, SHUHUI, CANICH, JO ANN M, HAGADORN, JOHN R, SEPEHR, MARYAM, ZHANG, JINGWEN, ECKERT, CHASE A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY FUELS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20 % by weight of ethylene, b) 80 to 98 % by weight of propylene; c) 50 to 99% of rr triads; and d) Mw (LS) of 10 to 250 kg/mol. L'invention concerne une composition d'huile lubrifiante qui comprend une grande quantité d'une huile de base lubrifiante et une petite quantité d'un améliorant d'indice de viscosité, comprenant un copolymère d'éthylène-propylène à base de propylène syndiotactique comprenant : a) 2 à 20 % en poids d'éthylène, b) 80 à 98 % en poids de propylène ; c) 50 à 99 % de triades rr ; et d) Mw (LS) de 10 à 250 kg/mol.