Patent ID: 7960503
Filing Date: 2011-06-14
Classification: C08F,Y10T

Abstract:
1. A method of continuously washing a poly(vinyl butyral) resin, comprising the steps: providing a first continuous stirred tank reactor; providing a second continuous stirred tank reactor; adding a continuous stream of poly(vinyl butyral) slurry to said first continuous stirred tank reactor; washing said continuous stream of poly(vinyl butyral) slurry in said first continuous stirred tank reactor to form a once washed poly(vinyl butyral) slurry; moving said once washed poly(vinyl butyral) slurry to said second continuous stirred tank reactor; washing said once washed poly(vinyl butyral) slurry in said second continuous stirred tank reactor to form a twice washed poly(vinyl butyral) slurry; and, removing said twice washed poly(vinyl butyral) slurry from said second continuous stirred tank reactor.