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| Number | Title | Issue Date |
| 7425584 | Catalytic devulcanization of rubber The present invention relates generally to the delulcanization of rubber. More specifically, the present invention relates to a process for the hydro-devulcanization of vulcanized rubber utilizing a rubber swelling solvent, a source of reactive hyrogen and elevated ... | 09/16/2008 |
| 7342052 | Process for regeneration of an elastomer from scrap The invention relates to a process for converting an elastomer from scrap to a regenerated elastomer which comprises the steps of: (a) introducing the elastomer from scrap into a vessel; (b) agitating the elastomer from scrap; (c) heating the elastomer from scrap to... | 03/11/2008 |
| 7285058 | Pre-vulcanized or pre-crosslinked materials for golf balls The present invention relates to golf ball components and golf balls comprising high levels of pre-vulcanized or pre-crosslinked materials, as well as methods of making same. The pre-vulcanized or pre-crosslinked materials are typically thermoset materials that are ... | 10/23/2007 |
| 7241858 | Reduction in polystyrene foams with dibasic esters A foam reduction agent consisting of dibasic esters is shown and a process using a liquid contact with polystyrene foam wherein the higher boiling temperature of the dibasic esters and contact with the liquid provides a volume reduction process and less evaporation ... | 07/10/2007 |
| 7189762 | Method of modifying crosslinked rubber A method of modifying crosslinked rubber comprising subjecting the rubber to mechanical elongational and shear forces in the presence of a supercritical fluid that is normally gaseous. Controllable devulcanization of the rubber is achieved. ... | 03/13/2007 |
| 7141196 | Method of manufacturing a golf ball having one or more layers The present invention relates to golf ball components and golf balls comprising high levels of pre-vulcanized or pre-crosslinked materials, as well as methods of making same. The pre-vulcanized or pre-crosslinked materials are typically thermoset materials that are ... | 11/28/2006 |
| 7083127 | Apparatus and method for modifying surface of polymer powder by rotational ultrasonic treatment An apparatus and a method for modifying the surface of a polymer powder utilizes a rotational ultrasonic treatment that pulverizes polymer materials, such as rubber, waste rubber, and plastics, and modifies the surface, so that the polymer materials can be recycled ... | 08/01/2006 |
| 7056956 | Method for recycling a plastic material Process for recycling a plastic, according to which the plastic is brought into contact with a solvent capable of dissolving the same and the plastic dissolved in the solvent is precipitated using a non-solvent in the presence of a phase-separating agent, in which t... | 06/06/2006 |
| 7056422 | Batch thermolytic distillation of carbonaceous material A distillation system is provided for batch thermolytic distillation of lump carbonaceous material, such as lump wood and shredded rubber tires. The system preferably includes multiple distillation units mounted side-by-side. Each unit includes a reactor bath for ho... | 06/06/2006 |
| 6960046 | Permeable and elastic pavement blocks Permeable and elastic pavement blocks comprising waste-polyurethane chips, which use a binder specially developed to secure the binding between an upper polyurethane-chip layer and a lower permeable-concrete layer as well as the binding among the waste-polyurethane ... | 11/01/2005 |
| 6861568 | Process for waste plastic recycling A process for recycling or decomposing waste plastic where such wasteplastic is decomposed in a diluent such as hot oil through actions involvingfree radical precursor, such as polyvinyl chloride or polyurethane, is achievedat low temperature. The thermal decomposit... | 03/01/2005 |
| 6620363 | Thermoset recycling methods and solid article produced The invention provides new methods for recycling thermoset materials such as natural rubbers, synthetic rubbers, silicone rubbers, and other elastomers and cross-linked polymers (e.g., isoprene rubbers; butyl rubbers; ethylene-propylene-diene-rubbers, "EP... | 09/16/2003 |
| 6555588 | Method for the production of a polypropylene blend A method for producing a polypropylene blend from a plastic packaging materials containing high molecular weight polypropylene, other high molecular weight polymers such as polyethylene, low molecular weight polymers and other contaminants. The method inc... | 04/29/2003 |
| 6548559 | Thermoplastic compositions and methods A new composition is formed by combining a reduced waste rubber, a heavy paraffin and a reduced waste thermoplastic, and then further reducing the resulting material while holding it at an elevated temperature. In preferred embodiments the rubber and ther... | 04/15/2003 |
| 6489372 | Polycarbonate isolation through homogenization devolatization Polymer are removed from organic solvent-polymer mixtures by preparing a liquid-liquid dispersion of finely dispersed solvent droplets containing polymer in water, adding this liquid-liquid dispersion to a stirred vessel containing water or other suitable... | 12/03/2002 |
| 6384093 | Method of melt processing crosslinked thermoplastic material A method of enhancing the melt-processibility of crosslinked plastic or recycling crosslinked plastic and the products formed by these methods. The melt processibility of a crosslinked thermoplastic resin may be enhanced by mixing it with a low viscosity ... | 05/07/2002 |
| 6344493 | Melt tension improver for polyolefin resins and process for producing the same A melt tension enhancer for polyolefin resins that contains polytetrafluoroethylene and a polymer of an alkyl (meth)acrylate of 5-30 carbon atoms, and a process for its production. Its addition to polyolefin resins enhances the melt tension of the polyole... | 02/05/2002 |
| 6335377 | Reclaimed rubber and process for reclaiming vulcanized rubber Reclaimed rubber having excellent performance is applied for reuse in tires or for asphalt, etc. The reclaimed rubber obtained by devulcanization treatment of vulcanized rubber from discard tires, etc. has a proportion of sol to gel: 10-80%, a weight-aver... | 01/01/2002 |
| 6306222 | Process for cleaning plastics for recycling them A process for cleaning plastic materials is disclosed, in which foreign materials adhered on and internally intruded into the plastic materials are cleaned to recycle the plastic materials. The process for cleaning plastics to recycle them according to th... | 10/23/2001 |
| 6160031 | Process for decomposing a polymer to its monomer or monomers A process for decomposing a polymer which is capable of undergoing thermal depolymerization to its monomer or monomers, such as for example poly(methylmethacrylate), and for the recovery of at least one of the monomers, includes the steps of subjecting th... | 12/12/2000 |
| 6077874 | Process for improving the properties of ground recycled rubber A process involving (a) homogeneously dispersing tris(2-aminoethyl) amine in a recycled rubber having an individual particle size no greater than 420 microns, (b) mixing the treated recycled rubber with unvulcanized rubber and (c) vulcanizing the rubber m... | 06/20/2000 |
| 5998490 | Nonaqueous ozonation of vulcanized rubber A process and resulting product is provided in which a solid particulate, such as vulcanized crumb rubber, has the surface functional groups oxidized by ozonation using a nonpolar solvent. The ozonation process renders the treated crumb rubber more suitab... | 12/07/1999 |
| 5959007 | Bituminous compositions prepared with process treated vulcanized rubbers Stable rubberized bitumen concentrates are prepared by initially forming a mass comprising bitumen and crumb rubber particles in an amount of at least about 15 wt % of the mass with the crumb rubber being swollen in-situ, and applying shear and temperatur... | 09/28/1999 |
| 5905095 | Used tire process A method of processing used tires and the recovery of the products thereof. The process includes adding shredded automobile tire to a bath containing a combination of isocyanide, polyurethane, latex, and soybean oil. The resultant mixture is then heated a... | 05/18/1999 |
| 5891926 | Devulcanization of cured rubber This invention is based upon the unexpected discovery that cured rubber can be devulcanized by heating it to a temperature of at least about 150° C. under a pressure of at least about 3.4×106 Pascals in the presence of 2-butanol. The molecula... | 04/06/1999 |
| 5883139 | Process for improving the properties of ground recycled rubber A process involving (a) homogeneously dispersing tetrathiodipropionic acid in a recycled rubber having an individual particle size no greater than 420 microns, (b) mixing the treated recycled rubber with unvulcanized rubber and (c) vulcanizing the rubber ... | 03/16/1999 |
| 5811477 | Method for preparing improved asphalt emulsion compositions A method of preparing an asphalt emulsion composition comprises mixing an aqueous asphalt emulsion, water, latex rubber, and a solids mix composition comprising reclaimed rubber particles passing through a 40 mesh U.S. series sieve and one or more solid a... | 09/22/1998 |
| 5731358 | Process for the manufacture of high grade devulcanized rubbers from scrap and reject rubber items A process for the manufacture of devulcanized rubbers from a base material composed of scrap rubber products is provided which produces high grade, low viscosity rubber products. The process is carried out in at least two stages, the first stage comprisin... | 03/24/1998 |
| 5696173 | Restructuring silicone rubber to produce fluid or grease The invention comprises processes for the production of useful fluid or grease from curable silicone compositions or silicone rubbers, preferably reclaimed or scrap silicone rubber. The processes involve the application of energy in such a manner that a u... | 12/09/1997 |
| 5618852 | Used tire process A method of processing used tires and the recovery of the products thereof. The process includes adding shredded automobile tire to a bath containing a combination of isocyanide, polyurethane, latex, and soybean oil. The resultant mixture is then heated a... | 04/08/1997 |
| 5616646 | Restructuring silicone rubber to produce fluid or grease The invention comprises processes for the production of useful fluid or grease from curable silicone compositions or silicone rubbers, preferably reclaimed or scrap silicone rubber. The processes involve the application of energy in such a manner that a u... | 04/01/1997 |
| 5607981 | Method of manufacture of paint and adhesive rubber from vulcanized rubber Method of manufacture of paint and adhesive of rubber from vulcanized rubber that is reclaimed, becoming a product that provides impermeability, flexibility and resistance to the pellicle by process of reduction to small particles through cracking beater ... | 03/04/1997 |
| 5583168 | One-stage abrasive absorption process for producing tire rubber modified asphalt cement systems and products thereof A process for preparing a homogenous asphalt composition includes introducing distillation tower bottoms at a temperature of about 425°-470° F. to a vessel through which air is flowing at about 6-15 psi pressure, introducing ground tire rubber to the ve... | 12/10/1996 |
| 5556888 | Rubber compounds containing vulcanized scrap rubber, methods of manufacturing such rubber compounds A rubber compound obtained by compounding a raw rubber, powdered vulcanized scrap rubber with its surface partially processed via a swelling treatment, a vulcanizing agent and a vulcanizing accelerator. When manufacturing the compound, the scrap rubber is... | 09/17/1996 |
| 5539029 | Asphalt emulsion-rubber paving composition A method of preparing an asphalt emulsion-rubber paving composition comprises combining an aqueous asphalt emulsion, water, latex rubber, minus 40 size rubber particles, and a thickening agent, mixing said materials at substantially ambient temperature to... | 07/23/1996 |
| 5523328 | Process and apparatus for extruding mixtures of thermoplastic and thermoset materials and products made therefrom Disclosed as one embodiment is a method of producing useful articles from ground whole tire waste, which includes the steps of continuously extruding a heated mixture of ground whole tire waste and thermoplastic binder material into a continuously cooled,... | 06/04/1996 |
| 5516809 | Method for obtaining an elastomer product with high petroleum and its by-products absorption power Methods for obtaining an elastomer product capable of absorbing petroleum and its by products including the steps of forming a mixture of waste vulcanized rubber, resin and organic solvent, grinding the mixture in a mill in the presence of manganese to pr... | 05/14/1996 |
| 5418256 | Method of reclaiming scrap vulcanized rubber using supercritical fluids The invention pertains to a method of treating vulcanized rubber, such as scrap tires, in which the copolymer is treated with an organic solvent under supercritical conditions, such that an organic solution of several by-products is obtained. These can be... | 05/23/1995 |
| 5397818 | Process for producing tire rubber modified asphalt cement systems and products thereof A process for preparing an incorporated asphalt composition includes mixing ground tire rubber with distillation tower bottoms to form a wetted mixture of the ground tire rubber with the distillation tower bottoms, bombarding the wetted mixture of ground ... | 03/14/1995 |
| 5397825 | Rubber recycling process and product An active filler composition utilizing scrap rubber, such as automobile tires, as a main or primary ingredient is used in the treatment, recycling, and manufacture of various rubber and plastic articles. A chemical plasticizer and binding agent is used in... | 03/14/1995 |
