Resources Contact Us Home
Method of manufacturing polystyrene foam with polymer processing additives

Image Number 14 for United States Patent #8119701.

Disclosed is a method for making polystyrene foam which utilizes one or more atmospheric gases, particularly combinations of HFCs and CO.sub.2, as the blowing system in combination with a polymer processing aid (PPA), typically an ester that is relatively non-volatile at the extrusion temperature range. The blowing system and the PPA may both be introduced into the molten thermoplastic polystyrene resin or the PPA may be incorporated in the solid source polystyrene resins. The resulting foams will typically exhibit improved dimensional stability at ambient temperatures.

  Recently Added Patents
Architecture and method for multi-aspect touchscreen scanning
System and method for content delivery
Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation
Shield for vacuum circuit breaker
Shape memory polymers formed by self-crosslinking of copolymers
Methods and devices for rapid and specific detection of multiple proteins
Plastic floor-wall transition methods, materials, and apparatus
  Randomly Featured Patents
Refrigerating and heating apparatus using a solid sorbent
Expansion apparatus for expansion card on motherboard
Roofing seam installation process and products for the production of a seamed roof
Abscission of parts of plants
Unitized face sealing device
Broadband RF linear amplifier
Method and system for impedance matched switching
Efficient motor
Resonance type switching power source
Electronic device incorporating magnetoresistive elements for sensing both N and S magnetic poles