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
Methods and kits for predicting the responsiveness of hepatocellular carcinoma patients to 5-fluorouracil-based combination chemotherapy
Magnetic circuit and speaker using same
Steplessly adjustable cymbal locating device
System and method for reducing the risks involved in trading multiple spread trading strategies
Automated processing machine used for processing samples placed on slides and having an output device
Configurations and methods for effluent gas treatment
Display apparatus having a semi-penetration layer and a sealing unit
  Randomly Featured Patents
Electrical connector
N-([1,2,4] triazoloazinyl) thiophenesulfonamide compounds and their use as herbicides
1,3-dihydroisoindole derivatives
Pneumatic tire
Abrasion resistant monofilament for industrial fabrics
Vessel and prosthesis impregnated with diisocyanate crosslinked gelatin
Apparatus and method for generating a clock signal
Nitrogen-containing fused-heterocycle compounds
Multicomponent fiber
Free radical polymers based on meadowfoam esters