PETROLEUM OIL HAVING IMPROVED FLOW PROPERTIES

摘要

Crude oils, vacuum gas oils, and residual oils containing long chain polyalkyl (meth)acrylates as flow improvers, wherein the long chain polyalkyl (meth)acrylates are a mixture of (A) a polyalkyl (meth)acrylate P1 having an onset of crystallization at temperatures above 15.degree.C (measured as the cloud point of a 0.1 % solution in isooctane) and (B) a polyalkyl (meth)acrylate P2 having an onset of crystallization at temperatures at or below 15.degree.C, with the proviso that there is a temperature difference of at least 5 Centigrade degrees between the onset of the crystallization of polyalkyl (meth)acrylates P1 and the onset of crystallization of polyalkyl (meth)acrylates P2.