Class 521/42.5 - Treating with organic chalcogen-containing material

Subclass of Class 521 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Subject matter wherein the process requires an organic chalcogen-containing
No. of patents: 40
Last issue date: 09/16/2008

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
7032847	Method and installation for separating constituents of used tires The invention concerns a method for treating tyres, belts, inflatable boats, boots and other manufactured articles containing rubber, polymers and reinforcing elements, which is a close circuit system consisting in immersing the waste materials to be treated in a ho...	04/25/2006
6992116	Devulcanization of cured rubber The present invention discloses a process for devulcanizing cured rubber into devulcanized rubber that is capable of being recompounded and recured into useful rubber products, said process comprising heating the cured rubber to a temperature which is within the ran...	01/31/2006
6956065	Method for devulcanizing rubber with an amine The invention relates to a method for devulcanizing a sulphur-cured rubber, which rubber contains a network of a polymer, which polymer has a main chain of carbon atoms, in which for the vulcanization per 40 carbon-carbon bonds in the main chain a maximum of 1 unsat...	10/18/2005
6831109	Modifier for devulcanization of cured elastomers, mainly vulcanized rubber and method for devulcanization by means of this modifier The invention provides a modifier for devulcanization of cured elastomers, and especially vulcanized rubber, said modifier containing a first chemical substance, which is disposed towards on and the formation of an organic cation and amine, and further containing a ...	12/14/2004
6664303	Method of producing an elastomeric alloy that is similar to thermoplastic elastomers, on the basis of reclaimed rubber or waste rubber An elastomer blend that is similar to thermoplastic elastomers is produced from powered reclaimed rubber or waste rubber. The powdered rubber is processed to compounds by subjecting it to a melt-mixing process in a mixer together with a thermoplastic mate...	12/16/2003
6573303	Thermoplastic elastomers and polymers derived from recycled rubber and plastics Materials ranging from impact-modified thermoplastics to thermoplastic elastomers (TPE) can be obtained from blends of phase compatibility-treated recycled thermoset rubber with thermoplastic polymers by varying the ratio of components in the blend, or by...	06/03/2003
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
6329436	Process to recycle shredder residue A system and process for recycling shredder residue, in which separating any polyurethane foam materials are first separated. Then separate a fines fraction of less than about 1/4 inch leaving a plastics-rich fraction. Thereafter, the plastics rich fracti...	12/11/2001
6114401	Plastic reclamation process A plastic article or plastic container reclamation process if provided in which plastic containers are divided into relatively large pieces, then washed, agitated and separated using an aqueous solvent to remove residual materials. The residual materials ...	09/05/2000
6087406	Recycle of vulcanized fluorinated elastomers Compositions and techniques useful to effectively recycle crosslinked (i.e., vulcanized or cured) fluoroelastomers are disclosed. The invention utilizes an additive system that includes a cure-enhancing additive, a crosslinking agent, and an accelerator....	07/11/2000
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
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
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
5856376	Tire puncture sealant A tire puncture sealant containing water in an amount of from about 6% to about 64% by weight; ethylene glycol in an amount of from about 36% to about 94%; styrene butadiene latex in an amount of about 3%; polyethylene powder and ground rubber in an amoun...	01/05/1999
5798394	Rubber devulcanization process A process for devulcanizing and functionalizing a rubber vulcanizate by desulfurization involves suspending a rubber vulcanizate crumb in a solvent which preferably swells the rubber vulcanizate before or during the devulcanization reaction and adding an ...	08/25/1998
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
5674914	Method and apparatus for reclamation of waste polyvinyl chloride A method of reclaiming waste polyvinyl chloride according to the present invention includes the steps of bringing industrial waste containing polyvinyl chloride into contact with a solvent in which polyvinyl chloride can be dissolved, to remove polyvinyl ...	10/07/1997
5665784	Recovery of polyester from spent film Spent photographic film having at least a polyester base, blue dye, and a polyvinylidene binder layer, and from which the photographic emulsion has been removed, is treated to recover usable polyester. The spent photographic film is heated in cyclohexanon...	09/09/1997
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
5594035	Reclamation of polymers, that contain styrene in the polymeric backbone, using a water soluble solvent based reclamation process A process for the reclamation of polystyrene and other styrene containing polymers, by dissolving said polystyrene polymer into a water soluble solvent, such as NMP, and then precipitating said polymer away from the water soluble solvent through the addit...	01/14/1997
5506283	Higher modulus compositions incorporating particulate rubber Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a...	04/09/1996
5464877	Method for recovering a synthetic waste material contaminated with other materials A method for recovering a synthetic waste material contaminated with other materials, particularly waste optical disks, wherein the loose, uncrushed waste is chemically treated by impregnating said other materials with a chemical solution which attacks th...	11/07/1995
5382635	Higher modulus compositions incorporating particulate rubber Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a...	01/17/1995
5380793	Styrene soluble unsatured polyester resin from polyethylene terephthalate This invention is a low cost styrene-soluble unsaturated polyester resin made using recycled or virgin polyethylene terephthalate. The PET is first glycolyzed using inexpensive glycols and then reacted with maleic anhydride and dicyclopentadiene, forming ...	01/10/1995
5377844	Separation of normally hydrophobic plastic materials by froth flotation A targeted particulate, synthetic organic plastic material having normally hydrophobic surface characteristics is separated from a mixture of two or more of such plastic materials by conditioning the mixture of plastic materials in a flotation cell with a...	01/03/1995
5232954	Process for recovering thermoplastic resins using esters This invention relates to a process for recovering an ester-soluble thermoplastic resin comprising the steps of (1) crushing a shaped thermoplastic resin, (2) contacting the crushed thermoplastic resin with an ester to form a mixture, and (3) recovering t...	08/03/1993
5120768	Process for separating polyethylene terephthalate from polyvinyl chloride Today there is a growing demand to recycle plastics including polyethylene terephthalate. Sources of polyethylene terephthalate for recycling often contain polyvinyl chloride. It is necessary to separate polyvinyl chloride from the polyethylene terephthal...	06/09/1992
4579871	Method of reclaiming rubber Rubber crumb is subjected to direct reclaiming by being mixed with a plasticizer and optionally also a peptizer and, under agitation and supply of a gas atmosphere with controlled oxygen content and at a temperature of 130°-200° C., heated at substantia...	04/01/1986
4426459	Process for decomposing vulcanized rubber A process for decomposing vulcanized rubber which comprises swelling 100 parts by weight of vulcanized rubber with 10-3000 parts by weight of an organic solution, and adding and mixing 0.1-20 parts by weight of an organic hydroperoxide (a) and of 0.001-1 ...	01/17/1984
4305850	Process for decomposing vulcanized rubber Vulcanized rubber is decomposed by treating 100 parts by weight of vulcanized rubber with a solution containing 1-30 parts by weight of a diacyl peroxide having decomposition temperature of 90° C. or below and at least one member capable of swelling vulc...	12/15/1981
4256612	Preparation of epoxy resin-rubber-glass mixture and mixture produced Molded objects are formed from rubber and glass products, e.g. discarded glass and rubber, by grinding the rubber and glass into small particles and then melting them in separate kilns. The melted glass and rubber are then mixed together in various propor...	03/17/1981
4174992	Water proofing compositions for cement mortar or concrete and methods of application therefor Water proofing compositions containing a Reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works....	11/20/1979
4174993	Water proofing compositions for cement mortar or concrete and methods of application therefor Water proofing compositions containing a Reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works....	11/20/1979
4049588	Treatment of vulcanized rubber The invention provides finely divided vulcanized rubber having a particle size of generally less than 20 microns for re-use in the rubber industry. Vulcanizates produced from compositions containing the finely divided vulcanized rubber, either as the sole...	09/20/1977
4046834	Treatment of vulcanized rubber The invention provides finely divided vulcanized rubber having a particle size of generally less than 20 microns for re-use in the rubber industry. Vulcanizates produced from compositions containing the finely divided vulcanized rubber, either as the sole...	09/06/1977

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Class 521/42.5 - Treating with organic chalcogen-containing material