composição de graxa para resinas lubrificantes, mecanismo de engrenagem de redução, e, dispositivo de direção assistida elétrica

• Main Authors: TAKESHI YAMAMOTO, MICHITA HOKAO, HARUHIKO KIYOTA, IWAKI HIROOKA
• Format: Patent
• Language: Portuguese
• Published: 06.03.2018
• Subjects: BLASTING; CHEMISTRY; ENGINEERING ELEMENTS AND UNITS; FUELS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; LIGHTING; LUBRICANTS; LUBRICATING COMPOSITIONS; MECHANICAL ENGINEERING; METALLURGY; MOTOR VEHICLES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THERMAL INSULATION IN GENERAL; TRAILERS; TRANSPORTING; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION; WEAPONS

é provida uma composição de graxa para a lubrificação de resina que compreende um óleo base, um composto de diureia representado pela fórmula (i) como um espessante e um polímero de hidrocarboneto em cadeia, sendo o peso molecular médio ponderal do polímero de hidrocarboneto em cadeia de 20.000 a 300.000. r1-nhconh-r2-nhconh-r3 (i) (na fórmula (i), r2 é um grupo hidrocarboneto aromático divalente com 6 a 15 átomos de carbono. r1 e r3 são cada um, independentemente, um grupo alquila de cadeia linear ou ramificada com 8 a 22 átomos de carbono.) The invention provides a grease composition for lubricating resins which contains a base oil, a diurea compound represented by formula (I) as a thickener: R 1 - NHCONH - R 2 - NHCONH - R 3 (I) (wherein R 2 represents a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R 1 and R 3 each independently represent a straight-chain or branched alkyl group having 8 to 22 carbon atoms), and a chained hydrocarbon polymer having a weight-average molecular weight of 20,000 to 300,000.