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
Seat post having a non-uniform cross-section
Structural plasticity in spiking neural networks with symmetric dual of an electronic neuron
Software management system for network data processing systems
Direct file transfer between subscribers of a communications systems
Integrated circuit packaging system with coupling features and method of manufacture thereof
Methods and apparatus for power amplifier calibration
System and method for stranded file opens during disk compression utility requests
  Randomly Featured Patents
Removal of stationary noise pattern from digital images
Apparatus for heating and cooking food having a turntable
Portion of a shoe upper
Extendable and retractable propeller for watercraft
Hydrostatic relief valve
Amidine derivatives, preparation and use thereof as medicines
Structural covering
Changeable message stretch band