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Class Information
Number: 521/56
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
Description: Subject matter wherein a cellular product is produced from a particle.










Sub-classes under this class:

Class Number Class Name Patents
521/60 Adding expanding agent subsequent to solid polymer formation 561
521/59 Expandible system contains two or more solid polymers or at least one solid polymer and at least one polymer-forming system 313
521/58 Expanding utilizing plural expansion steps 185
521/57 Including step of surface coating a particle or process of expanding a surface coated particle 292


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Patent Number Title Of Patent Date Issued
8691736 Swellable polymer with cationic sites Apr. 8, 2014
8680168 Method for filling wall cavities with expanding foam insulation Mar. 25, 2014
8658707 Expandable functional TFE copolymer fine powder, the expanded functional products obtained therefrom and reaction of the expanded products Feb. 25, 2014
8598242 Expanded polypropylene copolymer resin particles Dec. 3, 2013
8598241 Polypropylene resin pre-foamed particle and method for producing same, and polypropylene resin in-mold foaming molded article 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
8569390 Polypropylene resin pre-expanded particles and in-mold foamed articles prepared therefrom Oct. 29, 2013
8568633 Elastic particle foam based on polyolefin/styrene polymer mixtures Oct. 29, 2013
8557883 Expandable functional TFE copolymer fine powder, the expandable functional products obtained therefrom and reaction of the expanded products Oct. 15, 2013
8518540 Expanded polypropylene resin beads and expanded bead molding Aug. 27, 2013
8513317 Process for producing expanded polyolefin resin particles and expanded polyolefin resin particles Aug. 20, 2013
8486531 Thermally expanded microspheres and a process for producing the same Jul. 16, 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
8465832 Composite laminated article and manufacture thereof Jun. 18, 2013
8455559 Preparing expandable styrene polymers Jun. 4, 2013
8431623 Process for forming a porous PVA scaffold using a pore-forming agent Apr. 30, 2013
8394867 Polypropylene resin foamed bead and molded article therefrom Mar. 12, 2013
8382945 Expandable microspheres and methods of making and using the same Feb. 26, 2013
8329294 Styrene-modified polypropylene type resin particle, foamable styrene-modified polypropylene type resin particle, styrene-modified polypropylene type resin foamed particle, styrene-modified pol Dec. 11, 2012
8329298 Heat-expandable microspheres and a process for producing the same Dec. 11, 2012
8324286 Heat-expandable microspheres, method for producing the same, and application thereof Dec. 4, 2012
8283389 Methods of manufacture of polylactic acid foams Oct. 9, 2012
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8268901 Coated particulate expandable polylactic acid Sep. 18, 2012
8268902 Composite material based on vinylaromatic polymers having enhanced thermal insulation properties and process for the preparation thereof Sep. 18, 2012
8252715 Water-absorbing agent and production method thereof Aug. 28, 2012
8247465 Heat-expandable microspheres, process for producing the same, and application thereof Aug. 21, 2012
8236431 Hollow organic pigment core binder coated paper and paperboard articles and methods for making the same Aug. 7, 2012
8207236 Method for the production of porous particles Jun. 26, 2012
8198340 Quality polymer foam from fluorinated alkene blowing agents Jun. 12, 2012
8158690 Temperature-sensitive active ingredient compositions for reducing the density of plastics Apr. 17, 2012
8129438 Method for producing foamed polyolefin resin beads Mar. 6, 2012
8114476 Process for improving the insulating capacity of expanded vinyl aromatic polymers and the products thus obtained Feb. 14, 2012
8088482 Expandable microspheres for foam insulation and methods Jan. 3, 2012
8087432 Flexible heat-insulated conduit and method of making same Jan. 3, 2012
8088835 Method for producing expansion-molded polypropylene-based resin article Jan. 3, 2012
8084509 Pre-expanded particulate polypropylene-based resin and in-mold expansion molded article Dec. 27, 2011
8076381 Polyhydroxyalkanoate-based resin foamed particle, molded article comprising the same and process for producing the same Dec. 13, 2011
8076380 Particulate expandable polystyrene (EPS), process for making particulate expandable polystyrene, as well as a particular application of polystyrene foam material Dec. 13, 2011
8067476 Foamed thermoplastic polyurethanes Nov. 29, 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
8034847 Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same Oct. 11, 2011
8030365 Compositions containing expandable microspheres and an ionic compound as well as methods of making and using the same Oct. 4, 2011
8026291 Expanded and extruded polyolefin foams made with methyl formate-based blowing agents Sep. 27, 2011
7994229 Thermo-expansive microspheres, their production process and their application Aug. 9, 2011
7964652 Expandable polyethylene resin particle and method for production thereof Jun. 21, 2011
7956147 Preparation method of hollow particle Jun. 7, 2011
7956096 Microspheres Jun. 7, 2011

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