Patent ID: 8486878

Claim:
A lubricant composition comprising: (i) a base oil; and (ii) an ethylene/α-olefin interpolymer comprising a hard segment and a soft segment, wherein the ethylene/α-olefin interpolymer: (a) has a Mw/Mn from about 1.7 to about 3.5; (b) has an ethylene content in the hard segment in the range of from 70 wt % to 85 wt % based on total monomer content in hard segment; (c) (i) has a hard segment composition of at least 40%, at least one melting point, Tm, in degrees Celsius and an amount of ethylene in weight percent, wt % C 2 , wherein the numerical values of Tm and wt % C 2 correspond to the relationship: 90° C.≧ Tm≧ 4.1276(wt % C 2 )−244.76; or (ii) has a hard segment composition of less than 40%, at least one melting point, Tm, in degrees Celsius and an amount of ethylene in weight percent, wt % C 2 , wherein the numerical values of Tm and wt % C 2 correspond to the relationship: 80° C.≧ Tm≦ 4.1276(wt % C 2 )−264.95; or (iii) is characterized by an average block index greater than zero and up to about 1.0; or (iv) has a molecular fraction which elutes between 0° C. and 130° C. when fractionated using low temperature TREF, characterized in that the fraction has a molar comonomer content of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer; or (v) has a relationship between ethylene content in wt % and log molecular weight such that a line plotted of ethylene content vs log molecular weight as measured by GPC-IR has an absolute slope, m, of equal to or less than 4 ; and, (d) has a turbidity measurement of a 1.0 wt % solution of the ethylene/α-olefin interpolymer in oil or a 1.5 wt % solution in dodecane of less than or equal to that of a comparable copolymer wherein the comparable copolymer has the same DSC enthalpy (J/g) at greater than 55° C. within ±5 J/g, and the same overall ethylene content within 10%; and wherein the soft segment comprises 35 wt % to 80 wt % comonomer.