Patent ID: 8815965
Filing Date: 2014-08-26
Classification: C08C

Abstract:
1. A process for recovering rubber from an aqueous non- Hevea natural rubber latex that contains natural rubber, water, extractables, and one or more additives, and is essentially free of lignocellulosic plant material, comprising the steps of: contacting the latex with a separating solvent composition comprising at least one hydrocarbon solvent in an amount of 5% to 60% by weight and at least one organic polar solvent in an amount of 40 to 95% by weight whereby at least 75% of the natural rubber is separated from the water and a solution having a viscous rubber phase containing natural rubber and a reduced amount of extractables is formed; isolating the viscous rubber phase; and drying the viscous rubber phase to create a resultant natural rubber wherein the resultant natural rubber has an amount of acetone extractables of 5% by weight or less.