Method of preventing haze in oil concentrates containing an amorphous ethylene-propylene copolymer viscosity index improver

Claim 1

A PROCESS OF PREVENTING HAZE IN AN OIL ADDITIVE CONCENTRATE COMPRISING (A) A HYDROCARBON SOLVENT, (B) 3. TO 20 WT. PERCENT BASED ON SOLVENT, OF A POLYMERIC POUR DEPRESSANT PREPARED FROM MONOMERS SELECTED FROM THE GROUP CONSISTING OF (1)C4-C22- ALKYL METHACRYLATES AND MIXTURES THEREOF, (2) A C4-CII N-ALKYL METHACRYLATE, MIXTURES THEREOF, AND A DIALKYLAMINOALKYLMETHACRYLATE AND (3) A C4-C22 N-ALKYL METHACRYLATE, MIXTURES THEREOF AND A N(ALKANONME) ACRYLAMIDE AND (A) 5TO 30 WT. PERCENT, BASED ON SOLVENT, OF AN ETHYLENE-PROPYLENE COPOLYMER HAVING AN AMORPHOUS STRUCTURE, A NUMBER AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 10,000 AD 100,000, A PROPYLENE CONTENT OF 20 TO 70 MOLE PERCENT AND A MU/MR OF LESS THAN ABOUT 5 WHICH COMPRISES ADMIXING THE HYDROCARBON SOLVENT AND THE ETHYLENE-PROPPYLENE COPOLYMER WITH THE POLYMERIC POUR DEPRESSANT, THE POLYMERIC POUR DEPRESSANTHAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 30,000 TO 120,000.