abstract |
PURPOSE: To provide a derivatized ethylene α-olefin polymer useful as a viscosity index improver for an oleaginous compsn. n CONSTITUTION: An ethylene α-olefin polymer composed of monomer units derived from ethylene and at least one α-olefin and having a number average mol.wt. of about 20,000-500,000 and containing at least 30% of terminal ethenylidene unsaturation in its polymer units on an average is substd. by at least one of a 3-10C monounsaturated carboxylic acid forming portion and a 4-10C monounsaturated dicarboxylic acid forming portion to form a derivatized ethylene α-olefin polymer. n COPYRIGHT: (C)1992,JPO |