摘要:
A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene ±-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.
摘要:
A lubricant composition comprising (a) an oil of lubricating viscosity; (b) a (meth)-acrylate-containing polymer comprising a multiplicity of arms containing at least 20 carbon atoms, said arms being attached to a multivalent organic moiety; and (c) an ethylene/olefin copolymer having a weight average molecular weight of about 10,000 to about 250,000, wherein the copolymer comprises about 40 to about 70 weight percent polymerized ethylene monomers and optionally further comprises polymerized propylene monomers; exhibits good viscometric and antiwear properties.
摘要:
A lubricating composition includes (A) an esterified copolymer comprising units (A1) derived from a vinyl monomer and units (A2) derived from a carboxylic acid monomer, the vinyl monomer comprising a vinyl aliphatic monomer, the carboxylic acid monomer comprising an ethylenically unsaturated carboxylic acid or derivative thereof, esterified with a primary alcohol; and (B) a diene rubber copolymer comprising at least a first block (B1) derived from a conjugated diene monomer and at least a second block (B2) derived from a vinyl aromatic monomer. A ratio of the diene rubber copolymer to the esterified copolymer in the lubricating composition (B:A) is from 0.01 to 0.9, by weight.
摘要:
A composition of the following components: an oil of lubricating viscosity; a polymethacrylate viscosity modifier; an ester of a maleic acid/styrene copolymer; and optionally, an additive package that imparts to the fluid the capacity to meet bench and dynamometer tests specified by an equipment manufacturer, is suitable for use as a functional fluid such as a tractor hydraulic fluid, under a wide variety of climatic conditions.
摘要:
The invention relates to stable polymer dispersions comprising: A) at least one dispersed polyolefin; B) at least one dispersing constituent; C) at least one ester, and; D) at least one ether containing (oligo)oxyalkyl groups, whereby the weight ratio of ester C) to ether D) ranges from 30:1 to 1:30.
摘要:
The present invention is intended to obtain a viscosity modifier for a lubricating oil, by the use of which a lubricating oil composition of excellent low-temperature properties can be obtained, and to obtain a lubricating oil composition of excellent low-temperature properties containing the viscosity modifier. The viscosity modifier for a lubricating oil comprises an ethylene/propylene copolymer (A) having the properties: the density is in the range of 857 to 882 kg/m , Mw is in the range of 80,000 to 400,000, Mw/Mn is not more than 2.3, and the density (D (kg/m )) and the melting point (Tm ( DEG C)) satisfy the relation Tm≤1.247xD-1037; or comprises an ethylene/propylene copolymer (B) having the properties: the ethylene content is in the range of 70 to 79 wt%, Mw is not less than 80,000 and less than 250,000, Mw/Mn is not more than 2.3, Tm is in the range of 15 to 60 DEG C, and the ethylene content (E (wt%)) and the melting point (Tm ( DEG C)) satisfy the relation 3.44xE-206≥Tm; or comprises an ethylene/propylene copolymer (C) having the properties: the ethylene content is in the range of 70 to 79 wt%, Mw is in the range of 250,000 to 400,000, Mw/Mn is not more than 2.3, Tm is in the range of 15 to 60 DEG C, and the ethylene content (E (wt%)) and the melting point (Tm ( DEG C)) satisfy the relation 3.44xE-204≥Tm. The lubricating oil composition comprises the ethylene/propylene copolymer (A) (B) or (C), a lubricating oil base (D), and if necessary, a pour point depressant.
摘要:
A copolymer of ethylene and at least two different types of unsaturated ester-derivable units improves the low temperature properties of fuel oils.
摘要:
Die erfindungsgemäßen Kompositionen sind gekennzeichnet durch einen Gehalt von 1,5-55 Gew.% an einem Zusatzstoffpaket, das jeweils aus einem oder mehreren Zusatzstoffen bestehende Komponenten "A", "B" und gegebenenfalls "C" enthält, welche eine folgende Zusammensetzung aufweisen:
10-100 Gew.% polyfunktionale, aschefreie, detergierend-dispergierend wirkende Zusatzstoff-Komposition oder deren ölige Lösung, wobei die polyfunktionale, aschefreie, detergierend-dispergierend wirkende Zusatzstoff-Komposition solche, gleiche oder verschiedene numerische Durchschnittsmolgeichte aufweisende Polymerkomponenten enthält, welche durch Umsetzung eines Polyolefin-Derivats, bevorzugt PIB-Derivats, welches mit einer oder mehreren Dicarbonsäuren und/oder Dicarbonsäureanhydrid und mit einem oder mehreren nichtsäureartigen Comonomeren mit ethylenischer Doppelbindung geimpft ist, und ein numerisches Durchschnittsmolgewicht von mindestens 800 hat, mit einer Amino- und/oder Imino- und/oder Hydroxygruppe enthaltendenen Verbindung hergestellt wurden, und in den Polymerkomponenten die Polyolefinkette durchschnittlich 1,6-20 Säurederivate trägt, und die Menge der Moleküle mit mehr als einem Säurederivat mindestens 25 Gew.% beträgt, wobei das Derivat ein Imid- und/oder Amid- und/oder Esteramid-Derivat sein kann, und 0-90 Gew.% übliches Alkenylbernsteinsäure-Derivat, wie Imid- und/oder Ester- und /oder Esteramid-Derivat;
ein oder mehrere übliche Zusatzstoffe, wie detergierend-dispergierend wirkende Zusatzstoffe mit verschiedener Basiszahl und verschiedenem Metallgehalt, Antioxydanten, reibungsvermindernde Stoffe, Abriebinhibitoren, Korrosionsinhibitoren, Schaumbekämpfungsmittel und fließpunktvermindernde Stoffe;
ein oder mehrere übliche viskositäts- und viskositätsindexerhöhende Polymere; wobei das Gewichtsverhältnis der Komponenten "A", "B" und "C" 15-85:15-85:0-70 beträgt.