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
Mobile communication device
Resin composition, prepreg, resin sheet, metal-clad laminate, printed wiring board, multilayer printed wiring board and semiconductor device
Gas cap removal tool
Utilizing virtually stored media snapshots for rasterizing print jobs
Simulation tool for air traffic communications security
Tropoelastin derivatives
  Randomly Featured Patents
Mono-enol ethers of 4-acetyl-3,3,5,5-tetramethylcyclohexanone
Battery charger
Self-aligned trench isolation for memory array using sidewall spacers
Morpholinoalkylindenes as antiglaucoma agents
Method for classifying data measured during drilling operations
Hydroxyethyl aminimides
Display control device, program for implementing the display control device, and recording medium containing the program
Plumbing installation
Apparatus and method for determining stack distance of running software for estimating cache miss rates based upon contents of a hash table
Device and method for aligning or adjusting sight for a firearm