| abstract |
A polymer mixture useful as a viscosity improver for lubricating oils is provided. A mixture comprising the following A) and B): A) a copolymer, comprising from about 70 to about 79% by weight of ethylene derived units and having the following: (A) ranging from about 50,000 to less than 130,000, as measured by gel permeation chromatography using polystyrene standards, and / or (f) SSI ≦ 18; (b) about 845. Density (D) in the range of about 895 kg / m 3 ; (c) less than 3 (D) a melting point (T m ) ranging from about 15 ° C. to about 60 ° C., measured by a differential scanning calorimeter; and (e) a degree of crystallinity ≧ 15%; and B) amorphous A polymer having a range of about 130,000 to about 1,000,000 and a crystallinity ≦ 5%. [Selection] Figure 1 |