| SK Chemicals Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120128807 | COMPOSITION FOR PREVENTING OR TREATING IRRITABLE BOWEL SYNDROME - The present invention relates to a composition or a method for treating or preventing irritable bowel syndrome. The present invention uses | 05-24-2012 |
| 20120123162 | TRANSDERMAL COMPOSITION COMPRISING TOLTERODINE - A transdermal composition comprising tolterodine having improved storage stability is disclosed. The transdermal composition comprising tolterodine contains an antioxidant to stabilize tolterodine and can be stored for a long period of time. | 05-17-2012 |
| 20120029163 | METHOD OF PREPARING A HEAT-RESISTANT POLYAMIDE - The present invention relates to a method of prepairing a heat-resistant polyamide by carrying out condensation polymerisation with a monomer mixture including a diester compound and a diamine compound. The present invention provides an economical method of prepairing a heat-resistant polyamide in that a monomer, a raw material, is simply and chiefly prepared, and the polymerizing reaction time is short because it does not need solvent separately. | 02-02-2012 |
| 20110275847 | VANADIUM PHTHALOCYANINE COMPOUNDS AND NEAR-INFRARED ABSORPTION FILTER USING THE SAME - A novel vanadium phthalocyanine compound with low absorptivity in the visible light region and high absorptivity in the near-infrared light region, and a near-infrared absorption filter using the same are disclosed. The near-infrared absorption vanadium phthalocyanine compound is represented by Formula 1 of claim | 11-10-2011 |
| 20110269935 | METHOD 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 |
| 20110269933 | METHOD FOR PREPARING A POLYESTER RESIN - Disclosed is a method for preparing a polyester resin, wherein phosphate additives are used in preparing polyester resin to improve the reactive property of the esterification reaction or transesterification, as well as the flame retardancy property and the color stability of a polyester resin. The method for preparing a polyester resin comprises the steps of: esterification reacting and/or transesterifying diacid ingredients diol ingredients in the presence of one or more phosphate additives selected from the group consisting of the compounds as defined in Chemicals in the detailed description of the invention; and polycondensing the products obtained from the esterification reaction and/or transesterification. | 11-03-2011 |
| 20110269879 | HIGH-STRENGTH POLYPHENYLENE SULFIDE/POLYETHYLENE TEREPHTHALATE BLEND RESIN COMPOSITION AND METHOD FOR PREPARING THE SAME - The present invention relates to a high-strength inflammable blend resin composition including a polyphenylene sulfide resin and a polyethylene terephthalate resin. More specifically, the resin composition of the present invention includes: a basic blend resin containing 10 to 80 wt. % of a polyphenylene sulfide resin, and 20 to 90 wt. % of a polyethylene terephthalate resin; and 0.1 to 20 parts by weight of a modified polystyrene or a styrene-based elastomer with respect to 100 parts by weight of the basic blend resin. | 11-03-2011 |
| 20110251342 | METHOD FOR PREPARING A POLYESTER RESIN IN WHICH ISOSORBIDE IS COPOLYMERIZED - The present invention relates to a method for preparing a polyester resin in which isosorbide is copolymerized, and more particularly, to a method for preparing a copolymerized polyester resin containing isosorbide, comprising the steps of: adding glycols containing ethylene glycol and isosorbide to terephthalic acid or dimethyl terephthalate such that the feed molar ratio of total glycols to terephthalic acid or dimethyl terephthalate is 1.05 to 3.0 to allow an esterification reaction; and polycondensing the esterification product using titanium-based compounds of copolymers of titanium dioxide and silicon dioxide, and copolymers of titanium dioxide and zirconium dioxide, as a copolymerization catalyst, and using phosphorous compounds as a stabilizer. The copolymerized polyester resin containing isosorbide prepared according to the present invention exhibits superior reactive properties and productivity, and reduces the quantity of metal used as a catalyst and improves the clarity of a polymer. Further, a high molecular weight copolymerized polyester resin can be prepared using a small amount of catalyst. | 10-13-2011 |
| 20110245550 | PROCESS FOR PREPARING IODINATED AROMATIC COMPOUNDS - The present invention relates to a process for preparing iodinated aromatic compounds. Particularly, the present invention comprises the step of performing the iodination of a non-halogenated aromatic compound, a monoiodo aromatic compound, a diiodo aromatic compound, and iodine in the presence of a zeolite catalyst under oxygen atmosphere. | 10-06-2011 |
| 20110230635 | COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME - The present invention relates to a copolymer polyester resin and a molded product using the same and more specifically to a copolymer polyester resin that contains 10˜80 mol % of 1,4-cyclohexane dimethanol, 0.1˜50 mol % of a diol compound expressed as HO—R | 09-22-2011 |
| 20110230634 | COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME - The present invention relates to a copolymer polyester resin and a molded product using the same and more specifically to a copolymer polyester resin that contains 10˜80 mol % of 1,4-cyclohexane dimethanol, 0.1˜30 mol % of a cyclohexane dimethanol compound expressed as HOH | 09-22-2011 |
| 20110224400 | COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME - The present invention relates to a copolymer polyester resin and a molded product using the same, and more specifically to a copolymer polyester resin that contains 10˜80 mol % of 1,4-cyclohexane dimethanol, 0.1˜50 mol % of a diol compound expressed as HO—(CH | 09-15-2011 |
| 20110217341 | METHOD FOR PREPARING MICROSPHERES AND MICROSPHERES PRODUCED THEREBY - The present invention relates to a method for preparing microspheres and microspheres prepared thereby, more particularly to a method for preparing a polymeric microsphere, including preparing an emulsion including a polymer compound, a drug, a water-insoluble organic solvent and a dispersion solvent and adding to the prepared emulsion a base or an acid to remove the water-insoluble organic solvent from the emulsion, a polymeric microsphere prepared thereby, and a composition for drug delivery including the microsphere. According to the present invention, a drug-containing polymer microsphere may be prepared quickly and simply without the solvent evaporation or solvent extraction process, thereby reducing water consumption and minimizing wastewater generation. | 09-08-2011 |
| 20100331552 | ACID SALT OF TOLTERODINE HAVING EFFECTIVE STABILITY FOR TRANSDERMAL DRUG DELIVERY SYSTEM - The present invention relates to an acid salt of tolterodine with superior stabililty and useful as a transdermal drug delivery system. More specifically, the present invention relates to a novel acid salt of tolterodine with superior stabililty to the conventional acid salts of tolterodine, which is useful as a pharmaceutical composition for the treatment of overactive bladder and can be formulated into a transdermal drug delivery system. | 12-30-2010 |
| 20100310687 | ANTI-GASTRITIS AND ANTI-ULCER AGENT CONTAINING MOMORDICAE SEMEN EXTRACT AND MOMORDICA SAPONIN I ISOLATED FROM THE SAME - The present invention relates to a Momordicae semen extract effective in the prevention and treatment of gastritis or gastric ulcer and | 12-09-2010 |
| 20100222617 | METHOD OF PREPARING IODINATED AROMATIC COMPOUNDS - The present invention relates to a method of preparing iodinated aromatic compounds, and more preferably a method of preparing iodinated aromatic compounds comprising a step of iodinating a reactant including an aromatic compound, a di-iodo aromatic compound or water, and iodine (I2) in the presence of a zeolite catalyst and oxygen. The method of the present invention has an advantage that by iodination of a reactant including the aromatic compound, and the di-iodo aromatic compound or water in the presence of the zeolite catalyst and oxygen, the temperature of the iodinating reactor can be controlled reliably and constantly, thereby resulting in improved productivity per unit weight of catalyst and inhibition of a side reaction in accordance with suppression of producing impurities. In addition, the productivity of the iodinated aromatic compound, preferably the di-iodo aromatic compound, more preferably a p-di-iodo aromatic compound can be improved, and thus can be widely used in the preparation of a di-iodo aromatic compound such as a p-di-iodo aromatic compound. | 09-02-2010 |
| 20100185031 | MANUFACTURING PROCESS FOR IODINATED AROMATIC COMPOUNDS - Disclosed is a method for preparing an iodinated aromatic compound. More specifically, disclosed is a method of preparing an iodinated aromatic compound by iodinating an aromatic compound in the presence of oxygen over a zeolite catalyst, in which the aromatic compound and its monoiodo compound, as raw materials, are allowed to react with iodine. In comparison with a method in which only the aromatic compound is used as a raw material without adding the monoiodo compound, the disclosed method can increase the productivity of diiodo compounds and the selectivity to a p-diiodo compound and, at the same time, suppress side reactions, thus lengthening the life span of the catalyst. | 07-22-2010 |
| 20100105845 | METHOD FOR PRODUCTION OF POLYARYLENE SULFIDE RESIN WITH EXCELLENT LUMINOSITY AND THE POLYARYLENE SULFIDE RESIN - The present invention relates to a process of producing polyarylene sulfide (PAS) and PAS resin produced therefrom, and more specifically, to a process of preparing polyarylene sulfide with better thermal properties and luminosity than conventional PAS and the PAS resin produced therefrom, including the steps of: a) melting and mixing a composition including solid sulfur, iodinated aryl compounds, and a polymerization terminator; b) polymerizing the molten mixture of step a) for 1 to 30 hours while increasing the temperature and decreasing the pressure from initial reaction conditions of a temperature of 180 to 250° C. and a pressure of 50 to 450 Torr to final reaction conditions of a temperature of 270 to 350° C. and a pressure of 0.001 to 20 Torr; and c) heating the reaction product of step b) at a temperature of 270 to 350° C. for 1 to 25 hours. The process of polyarylene sulfide resin further includes a step of heating the polymerized product at a high temperature following the polymerization step, and uses the polymerization terminator in a suitable amount to control the molecular weight of polyarylene sulfide, thereby producing polyarylene sulfide with excellent thermal properties and luminosity. | 04-29-2010 |
| 20100094067 | METHOD OF PREPARING MONO-IODO BENZENE THROUGH TRANSIODINATION - The present invention relates to a method of preparing mono-iodo benzene with a transiodination reaction, and more preferably a method of preparing mono-iodo benzene including a step of performing transiodination of a reactant including benzene and at least a multi-iodo benzene selected from the group consisting of di-iodo benzene and tri-iodo benzene with an HY or HBeta type of zeolite having a Si/Al molar ratio of 10 to 100 as a catalyst. The method of the present invention has an advantage that iodine is recovered from by-products including m-di-iodo benzene, o-di-iodo benzene, and tri-iodo benzene obtained in the process of preparing p-di-iodo benzene, thereby resulting in minimizing the loss of iodine. | 04-15-2010 |
| 20100069632 | SALTS OF PYRROLOPYRIMIDINONE DERIVATIVES AND PROCESS FOR PREPARING THE SAME - The present invention relates to salts of a pyrrolopyrimidinone derivative having superior PDE-5 inhibition activity and a process for preparing the same. More particularly, the present invention relates to a crystalline acid addition salt prepared by reacting a pyrrolopyrimidinone derivative with an acid selected from gentisic acid, maleic acid, citric acid, fumaric acid and tartaric acid. With no hygroscopic property and superior long-term storage stability, photostability and thermal stability, the salts of the pyrrolopyrimidinone derivative are appropriate to be prepared into medications and, with superior PDE-5 inhibition activity, are useful for the treatment and prevention of erectile dysfunction, pulmonary arterial hypertension, chronic obstructive pulmonary disease, benign prostatic hypertrophy and lower urinary tract diseases. | 03-18-2010 |
| 20100022535 | 2-Pyridyl substituted imidazoles as ALK5 and/or ALK4 Inhibitors - 2-pyridyl-substituted imidazoles which are used advantageously in the treatment of diseases mediated by ALK 5 or ALK 4 inhibitors or both. | 01-28-2010 |
| 20090318569 | METHOD FOR PRODUCING MICROSPHERES LOADED WITH DRUGS AND MICROSPHERES LOADED WITH DRUGS PRODUCED THEREBY - The present invention relates to a method for producing polymeric microspheres loaded with drugs and polymeric microspheres loaded with drugs produced thereby, specifically a method for producing polymeric microspheres loaded with drugs, the method comprising the steps of a) adding a dispersion phase containing a high molecular compound, a drug, and a water-insoluble organic solvent to a dispersion solvent to produce an O/W (oil-in-water) type or 0/0 (oil-in-oil) type emulsion, or adding a W/O (water-in-oil) type emulsion, which is prepared by emulsifying an aqueous solution, in which a drug is dissolved, in a water-insoluble organic solvent, in which the high molecular compound is dissolved, to the dispersion solvent to produce a W/O/W (water-in-oil-in-water) type emulsion; and b) adding an ammonia solution to the emulsion produced in step a) to convert the water-insoluble organic solvent into water-soluble solvents, and polymeric microspheres loaded with drugs produced thereby. According to the present invention, the desired polymeric microspheres loaded with drugs can be simply produced with a small amount of water in a short period of time. | 12-24-2009 |
| 20080319022 | 2-Pyridyl substituted imidazoles as ALK5 and/or ALK4 inhibitors - 2-pyridyl-substituted imidazoles and their use in inhibiting ALK 5 and/or ALK 4 receptors is disclosed. | 12-25-2008 |
| 20080319012 | 2-Pyridyl substituted imidazoles as ALK5 and/or ALK4 inhibitors - 2-pyridyl-substituted imidazoles which are used advantageously in the treatment of diseases mediated by ALK 5 or ALK 4 receptor or both. | 12-25-2008 |
| 20080249314 | Optical Resolution Method of Amlodipine - The present invention relates to a method for optical resolution of amlodipines by using isopropanol solvent and optically active O,O′-dibenzoyl tartaric acid as chiral reagent. More particularly, the present invention relates to a method comprising (a) obtaining (R)— or (S)-amlodipine dibenzoyl tartrate salt or solvate thereof by reacting (R,S)-amlodipines with optically active O,O′-dibenzoyl tartaric acid in isopropanol solvent, and (b) treating the (R)— or (S)-amlodipine salt with a base, thus obtaining optically active amlodipine. | 10-09-2008 |
| 20080207614 | QUINAZOLINE DERIVATIVES FOR THE TREATMENT AND PREVENTION OF DIABETES AND OBESITY - The present invention relates to novel quinazoline derivatives effective in lowering blood glucose level and body weight, and a medicine for treatment and/or prevention of diabetes and/or obesity, which comprises the compound as an active ingredient. | 08-28-2008 |
