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Class Information
Number: 521/59
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 > Expandible system contains two or more solid polymers or at least one solid polymer and at least one polymer-forming system
Description: Subject matter wherein two or more solid polymers are present during the cell-forming operation, or wherein, in addition to the solid particulate polymer, additional polymer-forming ingredients are present.

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8598241 Polypropylene resin pre-foamed particle and method for producing same, and polypropylene resin in-mold foaming molded article Dec. 3, 2013
8598242 Expanded polypropylene copolymer resin particles Dec. 3, 2013
8592494 Styrene-modified linear low-density polyethylene-based resin beads, styrene-modified linear low-density polyethylene-based expandable resin beads, production method therefor, pre-expanded bead Nov. 26, 2013
8592495 Thermoplastic resin composite bead production method, expandable thermoplastic resin composite bead, expanded thermoplastic resin composite bead, and foamed molded article formed from expanded Nov. 26, 2013
8568633 Elastic particle foam based on polyolefin/styrene polymer mixtures Oct. 29, 2013
8569390 Polypropylene resin pre-expanded particles and in-mold foamed articles prepared therefrom Oct. 29, 2013
8557885 Extruded thermoplastic resin foam Oct. 15, 2013
8519049 Curable composition Aug. 27, 2013
8507091 Method of reducing odor of composite resin particles, and composite resin particles Aug. 13, 2013
8476325 Styrene-modified polyethylene-based resin beads, styrene-modified polyethylene-based expandable resin beads, production method therefor, pre-expanded beads and expanded molded article Jul. 2, 2013
8455560 Foam layer produced of a biodegradable polyester mixture Jun. 4, 2013
8268902 Composite material based on vinylaromatic polymers having enhanced thermal insulation properties and process for the preparation thereof Sep. 18, 2012
8236431 Hollow organic pigment core binder coated paper and paperboard articles and methods for making the same Aug. 7, 2012
8084509 Pre-expanded particulate polypropylene-based resin and in-mold expansion molded article Dec. 27, 2011
8084510 Expandable polystyrenic resin particles and production process thereof, pre-expanded particles and molded foam product Dec. 27, 2011
8076381 Polyhydroxyalkanoate-based resin foamed particle, molded article comprising the same and process for producing the same Dec. 13, 2011
8063177 Pre-expanded polypropylene resin particle, and method for production thereof Nov. 22, 2011
8058320 Thermally foamable microsphere, production method thereof, use thereof, composition containing the same, and article Nov. 15, 2011
7947751 Expandable resins May. 24, 2011
7868053 Expandable polystyrene granulates with a bi- or multi-modal molecular-weight distribution Jan. 11, 2011
7855237 Plant for the manufacture of polymer particles Dec. 21, 2010
7767724 Expandable resin beads of styrene-modified straight-chain and low-density polyethylene, process for production thereof, pre-expand beads, and foams Aug. 3, 2010
7767723 Expandable resin particles of styrene-modified straight-chain and low-density polyethylenne, process the production thereof, pre-expanded particles, and foams Aug. 3, 2010
7741378 Porous monodispersed particles and method for production thereof, and use thereof Jun. 22, 2010
7718751 Syntactic phenolic foam composition May. 18, 2010
7700023 Method for producing an environment protective foamed thermoplastic resin polymer Apr. 20, 2010
7638559 Expandable resins Dec. 29, 2009
7579384 Expanded molded article having voids Aug. 25, 2009
7423071 Polypropylene based resin composition, expanded moldings comprising the same and method for production thereof Sep. 9, 2008
7300960 Expandable polypropylene resin particle and molded object obtained therefrom by in-mold molding Nov. 27, 2007
6930132 Use of a polypropylene based composition for expanded beads Aug. 16, 2005
6908949 Foamable interpolymer resin particles containing limonene as a blowing aid Jun. 21, 2005
6903143 Process for producing thermo-expansive microcapsules Jun. 7, 2005
6872761 Compositions for acoustic-damping coatings Mar. 29, 2005
6811980 Process for immobilization of nucleic acid molecules on a substrate Nov. 2, 2004
6770681 Foamable copolymer resin and a method for preparing the same Aug. 3, 2004
6770682 Expandable styrene resin beads and foams produced therefrom Aug. 3, 2004
6767931 Foam compositions from blend of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic interpolymers Jul. 27, 2004
6756413 O/W aqueous thermosetting resin dispersion, FRP precision filter medium made with the aqueous dispersion, and process for producing the same Jun. 29, 2004
6716914 Compatible linear and branched ethylenic polymers and foams therefrom Apr. 6, 2004
6710130 Propylene polymer composition and its foam moldings Mar. 23, 2004
6673451 Process for forming an aqueous polymeric dispersion Jan. 6, 2004
6638984 Microcellular foams, their method of production, and uses and products thereof Oct. 28, 2003
6630422 Absorbent polymer material based on renewable starting materials Oct. 7, 2003
6617364 Method for synthesizing thermo-expandable polymeric microspheres Sep. 9, 2003
6617363 Method of producing thermally expansive microcapsule Sep. 9, 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
6593381 Uniformly dense polymeric foam body Jul. 15, 2003
6576693 Pre-expanded particles of polypropylene resin and inmolded foamed article using the same Jun. 10, 2003

1 2 3 4 5 6 7

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