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528 - Synthetic resins or natural rubbers -- part of the class 520 series


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Class / Patent application numberDescriptionNumber of patent applications / Date published
528377000 From heterocyclic compound containing a sulfur atom as a ring member 49
528374000 From mercaptan or mercaptide-containing reactant 19
528391000 From organic reactant containing a sulfur to oxygen bond, e.g., -S(=O), etc. 19
528381000 From inorganic sulfur-containing reactant 13
528390000 From organic reactant containing a -C(=S)-group 1
20130190473TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - Disclosed is a toner for electrostatic image development that has low-temperature fixability and hot offset resistance and also has document offset resistance. The toner contains a hyperbranched polymer which is a homopolymer formed using an inimer having, in its molecule, a polymerizable functional group and a polymerization initiating group or is a copolymer formed using the inimer and a vinyl-based monomer. The hyperbranched polymer is preferably a terminal-modified hyperbranched polymer and is preferably obtained by a living radical polymerization process.07-25-2013
20100160598PROCESS FOR PRODUCING FLUOROPOLYMER PARTICLES - To provide a process for producing fluoropolymer particles, whereby formation of fine particles is suppressed.06-24-2010
20090156780Poly (Arylene Sulfide) and Production Process Thereof - A dehydration step is conducted by heating a mixture containing an organic amide solvent and a sulfur source including an alkali metal hydrosulfide, and a part of an overall charged amount of an alkali metal hydroxide as needed. The mixture remaining within the system after the dehydration step is mixed with a dihalo-aromatic compound, the resultant mixture is heated to conduct a polymerization reaction, and the alkali metal hydroxide is added to the mixture for polymerization reaction continuously or in portions to control the pH of the mixture for polymerization reaction within a range of from 7 to 12.5 from the beginning to the end of the polymerization reaction. The poly(arylene sulfide) according to the present invention has a nitrogen content of at most 800 ppm.06-18-2009
20090253892Sulfur-Crosslinked Hydrogenated Vinyl Polybutadienes, and Use Thereof for the Production of Technical Rubber Articles Having Good Recovery Behavior Across a Large Temperature Range - The present invention relates to sulphur-crosslinked hydrogenated vinylpolybutadienes which serve for production of technical rubber items and of tyre components and have very good recovery performance over a wide temperature range.10-08-2009
20130217855METHOD FOR MANUFACTURING A MOLD - Provided is a method for manufacturing a mold for manufacturing a molded article, by which not only is the occurrence of flash suppressed but also the crystallization of the surface is sufficiently accelerated when the mold temperature during the molding of a crystalline thermoplastic resin is set at T08-22-2013
20110034667PROCESSES FOR POLYMERIC PRECURSORS FOR AIGS SILVER-CONTAINING PHOTOVOLTAICS - This invention relates to processes for compounds, polymeric compounds, and compositions used to prepare semiconductor and optoelectronic materials and devices including thin film and band gap materials. This invention provides a range of compounds, polymeric compounds, compositions, materials and methods directed ultimately toward photovoltaic applications, transparent conductive materials, as well as devices and systems for energy conversion, including solar cells. In particular, this invention relates to polymeric precursor compounds and precursor materials for preparing photovoltaic layers. A compound may contain repeating units {M02-10-2011
20120165501PROCESS FOR PRODUCING POLYARYLENE SULFIDE - Provided is a production process by which polyarylene sulfide can be obtained at a low temperature and in a short time, which production process is a process for producing polyarylene sulfide, comprising heating a cyclic polyarylene sulfide in the presence of a zero-valent transition metal compound. Examples of zero-valent transition metal compounds include complexes comprising, as metal species, nickel, palladium, platinum, silver, ruthenium, rhodium, copper, silver, and gold, and heating is preferably carried out in the presence of 0.001 to 20 mol % of the zero-valent transition metal compound based on sulfur atoms in the cyclic polyarylene sulfide.06-28-2012
20090082544PROCESS FOR PRODUCING POLYTHIOL COMPOUND FOR OPTICAL MATERIALS, AND POLYMERIZABLE COMPOSITION CONTAINING POLYTHIOL COMPOUND - Provided is a process for producing a polythiol compound for an optical material, the method includes reacting 2-mercaptoethanol with an epihalohydrin compound to give polyalcohol, and preparing a polythiol compound through the polyalcohol, wherein a content of bis(2-hydroxyethyl) disulfide in the 2-mercaptoethanol is 0.5 wt % or less.03-26-2009
20100234559POLY (ARYLENE SULFIDE) - In a process for producing a poly(arylene sulfide) by polymerizing a sulfur source and a dihalo-aromatic compound in the presence of an alkali metal hydroxide in an organic amide solvent, the production process comprises washing a polymer obtained by the polymerization with a hydrophilic organic solvent containing water in a proportion of 1 to 30% by weight, thereby collecting a purified polymer, the content of nitrogen contained in an extract extracted by a mixed solvent containing 40% by weight of acetonitrile and 60% by weight of water from the purified polymer is at most 50 ppm on the basis of the weight of the polymer, and a poly(arylene sulfide), the content of nitrogen contained in an extract extracted by a mixed solvent containing 40% by weight of acetonitrile and 60% by weight of water from the purified polymer is at most 50 ppm on the basis of the weight of the polymer.09-16-2010
20080249281Degradable polymers and methods of preparation thereof - The present invention provides polymers which substantially degrade in the presence of one or more triggers, preferably light energy or hydrogen peroxide, but does not substantially degrade in the absence of one or more triggers.10-09-2008
20080221300Janus Dendrimers and Dendrons - This invention provides a cost effective process and new Janus dendrimers where at least two dendrons are attached at the core (with or without a connector group) and where at least two of the dendrons have different functionality. Preferred are those Janus dendrimers where at least one dendron is a PEHAM dendron. Thus these Janus dendrimers are heterobifunctional in character and use unique ligation chemistry with single site functional dendrons, di-dendrons and multi-dendrons. Also included are Janus dendrons which maybe used as intermediates to make the Janus dendrimers or to further react with another reactive moiety. These Janus dendrimers can provide several new dendrimer moieties, namely: combinatorial libraries of bifunctional structures; combined target director and signaling dendrimers; specific targeting entities for diagnostic and therapeutic applications, such as for example targeted MRI agents, targeted radionuclide delivery for diseases such as cancer, and targeted photosensitive or radiowave sensitive agents.09-11-2008
20110269935METHOD FOR PREPARING POLYARYLENE SULFIDE WITH REDUCED FREE IODINE CONTENT - The present invention relates to a method for preparing polyarylene sulfide with a reduced free iodine content. More specifically, the method for preparing polyarylene sulfide includes: (a) polymerizing reactants including a diiodo aromatic compound and a sulfur compound to form a polyarylene sulfide; and (b) maintaining the polyarylene sulfide product at 100 to 260° C. for heat-setting. The preparation method of the present invention effectively reduces the free iodine content of the polyarylene sulfide to prevent potential corrosion of facilities for the subsequent process and improves the properties of the polyarylene sulfide product such as thermal stability, so the method can be usefully applied to industrial fields in regard to the preparation of polyarylene sulfide.11-03-2011
20090203872MANUFACTURING PROCESS FOR POLY (ARYLENE SULPHIDE) - This invention relates to a method of preparing poly(arylene sulfide) (PAS) from an iodo compound and a sulfur compound, and more particularly, to a method of preparing PAS, including adding a sulfur-containing polymerization terminator when PAS is produced using an iodo compound as an intermediate. Thereby, in final PAS, the residual iodine content may be maintained at the same level or decreased and other properties may be maintained at equal or superior levels, thanks to the use of the sulfur-containing polymerization terminator, which is much lower in price than conventional polymerization terminators.08-13-2009

Patent applications in class FROM SULFUR-CONTAINING REACTANT

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