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Class Information
Number: 521/60
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. > Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product > Adding expanding agent subsequent to solid polymer formation
Description: Subject matter wherein the expanding agent is added to a previously formed solid polymer, e.g., impregnating a particle with a blowing agent, etc.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456227 |
Polymer particles and related articles |
Nov. 25, 2008 |
| 7358280 |
Process for processing expandable polymer particles and foam article thereof |
Apr. 15, 2008 |
| 7241816 |
Expandable styrene resin particles, expandable beads, and foamed article |
Jul. 10, 2007 |
| 7192989 |
Method and expansion device for preparing expanded thermoplastic microspheres |
Mar. 20, 2007 |
| 7175728 |
Heat-peelable adhesive sheet |
Feb. 13, 2007 |
| 7067030 |
Heat-peelable adhesive sheet |
Jun. 27, 2006 |
| 7022745 |
Process for forming solid pressure sensitive adhesive polymer microspheres |
Apr. 4, 2006 |
| 6984347 |
Thermo-expansive microcapsules and their application |
Jan. 10, 2006 |
| 6967221 |
Hollow filler-containing silicone rubber and method of production |
Nov. 22, 2005 |
| 6914085 |
Expanded polypropylene granule composition |
Jul. 5, 2005 |
| 6908949 |
Foamable interpolymer resin particles containing limonene as a blowing aid |
Jun. 21, 2005 |
| 6822023 |
Flame retardant polyolefin resin pre-expanded particles and in-mold foamed articles prepared therefrom |
Nov. 23, 2004 |
| 6800669 |
Propylene copolymer foams |
Oct. 5, 2004 |
| 6797734 |
Polypropylene resin pre-expanded particle and in-mold expanded article thereof |
Sep. 28, 2004 |
| 6797733 |
Expandable styrene resin particles, expandable beads, and foamed article |
Sep. 28, 2004 |
| 6787580 |
Water-free preparation process for multimodal thermoplastic polymer foam and foam therefrom |
Sep. 7, 2004 |
| 6770681 |
Foamable copolymer resin and a method for preparing the same |
Aug. 3, 2004 |
| 6767931 |
Foam compositions from blend of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic interpolymers |
Jul. 27, 2004 |
| 6759445 |
Foam material comprising linear, isotactic polymers |
Jul. 6, 2004 |
| 6743846 |
Preparation of flame retardant expandable poly(arylene ether)/polystyrene compositions |
Jun. 1, 2004 |
| 6727291 |
Preparation of expandable propylene polymer beads |
Apr. 27, 2004 |
| 6710130 |
Propylene polymer composition and its foam moldings |
Mar. 23, 2004 |
| 6689465 |
Porous beads and process for producing the same |
Feb. 10, 2004 |
| 6686400 |
Foamed and expanded beads of polyester-based resin and foam molding obtained therefrom |
Feb. 3, 2004 |
| 6677040 |
Expanded polypropylene particles |
Jan. 13, 2004 |
| 6673451 |
Process for forming an aqueous polymeric dispersion |
Jan. 6, 2004 |
| 6641752 |
Azeotrope-like compositions containing fluoroethane |
Nov. 4, 2003 |
| 6638984 |
Microcellular foams, their method of production, and uses and products thereof |
Oct. 28, 2003 |
| 6617364 |
Method for synthesizing thermo-expandable polymeric microspheres |
Sep. 9, 2003 |
| 6613810 |
Expandable microspheres and process for producing the same |
Sep. 2, 2003 |
| 6610798 |
Controlled suspension polymerization process without mechanical agitation |
Aug. 26, 2003 |
| 6608150 |
Preparation of expandable styrene polymers |
Aug. 19, 2003 |
| 6602928 |
Packing material and cartridge for solid phase extraction |
Aug. 5, 2003 |
| 6599951 |
Antireflective porogens |
Jul. 29, 2003 |
| 6596782 |
Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded molding |
Jul. 22, 2003 |
| 6593383 |
Process for preparing polyolefin pre-expanded particles |
Jul. 15, 2003 |
| 6583205 |
Flame retardant expandable poly(arylene ether)/polystyrene compositions and preparation thereof |
Jun. 24, 2003 |
| 6583187 |
Continuous processing of powder coating compositions |
Jun. 24, 2003 |
| 6583188 |
Grafted thermoplastic compositions and fabricated articles therefrom |
Jun. 24, 2003 |
| 6576693 |
Pre-expanded particles of polypropylene resin and inmolded foamed article using the same |
Jun. 10, 2003 |
| 6573306 |
Process for the preparation of expandable polyvinylarene particles |
Jun. 3, 2003 |
| 6562879 |
Water-absorbent resin powder and its production process and use |
May. 13, 2003 |
| 6538042 |
Porous polymer particles |
Mar. 25, 2003 |
| 6509384 |
Chemical product and method |
Jan. 21, 2003 |
| 6506807 |
Process for preparing pre-expanded particles of thermoplastic resin |
Jan. 14, 2003 |
| 6502621 |
Processes for forming styrene/methyl methacrylate copolymers |
Jan. 7, 2003 |
| 6497269 |
Processes for forming styrenic copolymers |
Dec. 24, 2002 |
| 6476088 |
Polyolefin foam beads having high density crust and method for manufacturing the same |
Nov. 5, 2002 |
| 6476089 |
Expandable olefin bead polymers |
Nov. 5, 2002 |
| 6458858 |
Biodegradable polyester material particles |
Oct. 1, 2002 |
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