Patent ID: 6174991
Filing Date: 2001-01-16
Classification: C08C

Abstract:
A process for the recovery of a living polymer from a cement produced in a polymerization process wherein, the living polymer cement is shortstopped, washed, stabilized, coagulated, stripped and dried, characterized in that the recovery comprises:adding a short stop to said polymer in said cement,washing catalyst residue from said polymer with water in an amount of 5-100 wt. % by weight of the cement,adding a hindered phenol to said cement to stabilize said polymer,adding epoxidized soya bean oil to said polymer to stabilize the polymer against color degradation,coagulating and stripping said polymer,regulating the pH of the cement in the range of from about 3 to about 7, during the catalyst wash and the coagulation steps of the recovery process.