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
Vanadium, cobalt and strontium additives for use in aluminum back solar cell contacts
Cycloalkylamine substituted isoquinoline derivatives
System for wireless local area network (WLAN) transmission and for coexistence of WLAN and another type of wireless transmission and methods thereof
Pose-variant face recognition using multiscale local descriptors
Method and apparatus for belling plastic pipe
Method and apparatus for re-routing calls in a packet network during failures
Semiconductor device, integrated circuit and method of manufacturing an integrated circuit
  Randomly Featured Patents
Diaphysial cortical dowel
Multi-value nonvolatile semiconductor memory device
Multifunctional apparatus for appearance tuning and resolution reconstruction of digital images
Antibacterial agent and method
Ammonium chloride vaporizer cold trap
Rubber composition containing organofunctional silane
Use of activation and recovery times and dispersions to monitor heart failure status and arrhythmia risk
Rotative power and signal coupling
System and method for measuring shaft deflection in a wind turbine
Composite cylinder for a mini oil pressure transducer