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 of synthesizing heteromultimeric polypeptides in yeast using a haploid mating strategy
Memory with separate read and write paths
Systems and methods for updating a data store using a transaction store
Optical analysis device, optical analysis method and computer program for optical analysis
Solid-state imaging device and electronic apparatus with antireflection structure
Method of forming micropattern, method of forming damascene metallization, and semiconductor device and semiconductor memory device fabricated using the same
Aluminum galvanic cell
  Randomly Featured Patents
Submersible pump with guide means
Guide for aiding in backing-up vehicles
Method for the reductive amination of polysaccharides
Electric cable with stranded conductor filled with water blocking compound and with extruded insulation
Heat-developable photosensitive material and method of forming images
Identifying marker for tear perforation lines of rolled paper webs
Ultrasonic vibration method and ultrasonic vibration apparatus
Transistor amplifier
Chemically protective laminate
Apparatus for mounting tires on large wheels