Resources Contact Us Home
Method for isolating polyphenylene ether polymer resins from solution

Image Number 6 for United States Patent #6860966.

A method of removing substantially all solvent from a solution containing a polyphenylene ether polymer resin with little by-product formation (less than 250 ppm) is provided. The method employs a wiped thin film evaporator with a cylindrical heating chamber operating under conditions that satisfy the relationships defined by Equations I and II.Yields are maximized wherein values for feed rate (m) and percent solids (C) are selected to provide a maximum value for the output, Q, determined from the equation m*C=Q and the melt viscosity of the polyphenylene ether product is less than 50,000 centipoise at the operating temperature of the cylindrical heating chamber.

  Recently Added Patents
Active tags
Methods and apparatus for adapting network characteristics in telecommunications systems
Image recording device, image recording method, and computer program product that adds a fluorescent-whitening-agent onto a recording sheet
Quantifying the risks of applications for mobile devices
Diazeniumdiolated phosphorylcholine polymers for nitric oxide release
Low drop-out regulator providing constant current and maximum voltage limit
  Randomly Featured Patents
Methods and apparatus for loading radioactive seeds into brachytherapy needles
Plasma display apparatus and driving method thereof
Counter-rotating compaction head for manufacturing concrete pipes
Carrier phase estimation based on single-axis constant modulus cost criterion and Bussgang criteria
Collision detecting apparatus for vehicle
Power integrated circuit with vertical current flow and related manufacturing process
Bonding structure for manifold assemblies
Layout of integrated circuit with very large transistors
Stator retention mechanism