Patents Assigned to SK Chemical Co., Ltd.
  • Method of preparing a heat-resistant polyamide
    Patent number: 8822629
    Abstract: The present invention relates to a method of prepairing a heat-resistant polyamide by carrying out condensation polymerization 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.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: September 2, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Dong-June Hwang, Jae-Bong Lim, Seung-Do Leem, Tae-Young Kim, Sung-su Bae
  • Composition with improved skin penetration for transdermal delivery of tolterodine
    Patent number: 8809401
    Abstract: Disclosed is a composition for transdermal administration containing tolterodine. The composition comprises lidocaine or a pharmaceutically acceptable salt thereof to achieve enhanced skin penetration. The composition enhances the skin penetration of tolterodine. Therefore, a successful commercial application of a tolterodine-containing transdermal preparation based on the composition can be expected.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: August 19, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Yong Youn Hwang, Won-Jae Choi, Jae-Sun Kim, Yeo-Jin Park, Joon-Gyo Oh, Bong-Yong Lee, Hae-In Rhee, Jong-Seob Im
  • PATCH CONTAINING RIVASTIGMINE
    Publication number: 20140220104
    Abstract: The present invention relates to a rivastigmine-containing patch having improved storage stability and proper release property.
    Type: Application
    Filed: May 21, 2012
    Publication date: August 7, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Yong-youn Hwang, Won-Jae Choi, Jae-Sun Kim, Won-No Youn, Yeo-Jin Park, Joon-gyo Oh, JongSeob Im
  • COMPOUND USEFUL FOR PREVENTING OR TREATING IRRITABLE BOWEL SYNDROME AND COMPOSITION INCLUDING SAME
    Publication number: 20140213647
    Abstract: The present invention provides a compound of formula (I) or a prodrug thereof useful for treating or preventing irritable bowel syndrome, and a composition comprising the compound as an active ingredient. Also, the present invention provides a method for treating or preventing irritable bowel syndrome, which comprises administrating a therapeutically or prophylactically effective amount of the compound or the composition to a subject in need of treating or preventing irritable bowel syndrome.
    Type: Application
    Filed: May 16, 2012
    Publication date: July 31, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Won suk Sun, Hyo Jin Jeon, Dongsun Min, Woongsik Kim, Taeksu Kim, Do-Seung Kum, Keun-Ho Ryu, Hae-In Rhee, Yang Hae Park, Hyun-Joo Son, Eun-ju Park, Bong-yong Lee, Hojin Namgung, Minseok Park, Minseok Kang
  • Stable pharmaceutical composition containing docetaxel and a method of manufacturing the same
    Patent number: 8791152
    Abstract: The present invention relates to a stable pharmaceutical composition for injection containing docetaxel and a method of preparing the same. More particularly, the present invention relates to a pharmaceutical composition for injection containing docetaxel having better storage stability than conventional medications, which is prepared by dissolving docetaxel, a water-insoluble compound, in distilled water after mixing it with cyclodextrin (CD) and a water-soluble polymer such as hydroxypropyl methylcellulose (HPMC), polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP) and lyophilizing the mixture, and a method of preparing the same.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: July 29, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Nam Ho Kim, Jin Young Lee, Jae-Sun Kim, Nam Kyu Lee, Woo Jae Jang, Joon Gyo Oh, Yoon-Jung Lee, Woong Sik Kim, Jin-Heung Sung, Key An Um
  • Triterpene compounds which are effective on improvement of brain function
    Patent number: 8790687
    Abstract: The present invention relates to the triterpene compounds improving in brain functions. In particular, the present invention relates to a novel use of the triterpene compounds represented by the Formula 1 for improving decreased memory and a pharmaceutical composition for improving brain functions comprising the triterpene compounds represented by the Formula 1.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: July 29, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Wonrack Choi, Chang-Kyun Han, Tae Kon Kim, Guang-Jin Im, Chil Mann Jung, Se Jun Yun, Bongcheol Kim, Soomin Lee, Wie-Jong Kwak
  • COMPOSITION FOR EYELASH GROWTH
    Publication number: 20140194501
    Abstract: The present invention relates to a pharmaceutical or cosmetic composition and a method for promoting eyelash growth, wherein nipradilol or pharmaceutically or cosmetically acceptable salts thereof are used as active ingredients. The composition of the invention may comprise prostaglandin F2? analogues.
    Type: Application
    Filed: June 8, 2012
    Publication date: July 10, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Sang-hwan Kang, Keun-Ho Ryu, DongChul Shin, Bong-yong Lee
  • POLYARYLENE SULFIDE RESIN WITH EXCELLENT LUMINOSITY AND PREPARATION METHOD THEREOF
    Publication number: 20140194592
    Abstract: The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285° C., and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity.
    Type: Application
    Filed: February 13, 2014
    Publication date: July 10, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Young-Rok Lee, Il-Hoon Cha, Yong-Jun Shin, Jun-Sang Cho
  • COMPOSITION FOR REDUCING SKIN WRINKLES INCLUDING PDE5 INHIBITOR
    Publication number: 20140187775
    Abstract: Disclosed is a composition effective in reducing skin wrinkles. The composition comprises a phosphodiesterase 5 (PDE5) inhibitor, preferably the compound of chemical formula 1, more preferably, mirodenafil as an active ingredient. Further disclosed is a method for reducing skin wrinkles using the composition.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: SK Chemicals Co., Ltd.
    Inventors: Soo-Min Lee, Sooheun Lee, Keun-Ho Ryu, Bong-Yong Lee, Jae-Sun Kim, Jung-Hoon Oh, Ye-Ji Jeon
  • COMPOSITION FOR REDUCING SKIN WRINKLES INCLUDING PDE5 INHIBITOR
    Publication number: 20140179701
    Abstract: Disclosed is a composition effective in reducing skin wrinkles. The composition comprises or uses a phosphodiesterase 5 (PDE5) inhibitor as an active ingredient. Further disclosed is a method for reducing skin wrinkles using the composition.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Soo-Min LEE, Sooheun LEE, Keun-Ho RYU, Bong-Yong LEE, Jae-Sun KIM, Jung-Hoon OH, Ye-Ji JEON
  • Method for preparing polyarylene sulfide having reduced iodine content
    Patent number: 8759478
    Abstract: A method for preparing polyarylene sulfide having reduced iodine content and excellent thermal stability is described. The method includes reacting a composition comprising diiodide aromatic compounds, sulfur compounds, and a polymerization terminator. The preparation method may effectively reduce iodine content of polyarylene sulfide to prevent corrosion of post processing equipment, improve properties of polyarylene sulfide such as thermal stability, and the like, and thus, it may be usefully applied in the industrial field relating to preparation of polyarylene sulfide.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: June 24, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Yong-Jun Shin, Il-Hoon Cha, Jae-Bong Lim, Sung-Gi Kim
  • Composition for reducing skin wrinkles including PDE5 inhibitor
    Patent number: 8716298
    Abstract: Disclosed is a composition effective in reducing skin wrinkles. The composition comprises or uses a phosphodiesterase 5 (PDE5) inhibitor as an active ingredient. Further disclosed is a method for reducing skin wrinkles using the composition.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: May 6, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Soo-Min Lee, Sooheun Lee, Keun-Ho Ryu, Bong-Yong Lee, Jae-Sun Kim, Jung-Hoon Oh, Ye-Ji Jeon
  • Method for preparing microspheres and microspheres produced thereby
    Patent number: 8697127
    Abstract: 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.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: April 15, 2014
    Assignees: Ewha University-Industry Collaboration Foundation, SK Chemicals Co., Ltd.
    Inventor: Hong Kee Sah
  • Copper phthalocyanine compounds and near-infrared absorption filter using the same
    Patent number: 8691978
    Abstract: A novel copper 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 copper phthalocyanine compound is represented by the following Formula 1, wherein, A2, A3, A6, A7, A10, A11, A14 and A15 are independently OR1, SR2 or a halogen atom, wherein at least four thereof are OR1; A1, A4, A5, A8, A9, A12, A13 and A16 are independently OR1, SR2, NR3R4 or a halogen atom, wherein at least two thereof are NR3R4, and at least four thereof are OR1; R1, R2, R3 and R4 are independently an alkyl group of 1 to 10 carbon atoms, an aryl group of 6 to 10 carbon atoms, or an aralkyl group of 7 to 15 carbon atoms.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: April 8, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Ju-Sik Kang, Jeong-Ho Park, Yu-Mi Chang
  • Manufacturing process for iodinated aromatic compounds
    Patent number: 8674148
    Abstract: 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 a monoiodo analog of the aromatic compound, or a monoiodo aromatic 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.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: March 18, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Han Seok Kim, Jong In Lee, Il Hoon Cha, Yoon Seo Lee
  • METHOD FOR PREPARING MICROPARTICLES WITH REDUCED INITIAL BURST AND MICROPARTICLES PREPARED THEREBY
    Publication number: 20140072531
    Abstract: A method for preparing polymer microparticles with a reduced initial burst, and the polymer microparticles prepared thereby, the method including: contacting polymer microparticles with an alcohol aqueous solution, the polymer microparticles prepared thereby, and use for drug delivery of the polymer microparticles.
    Type: Application
    Filed: November 20, 2013
    Publication date: March 13, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Hong Kee KIM, Kyu Ho Lee, Joon-Gyo OH, Bong-Yong Lee
  • Vanadium phthalocyanine compounds and near-infrared absorption filter using the same
    Patent number: 8669358
    Abstract: A vanadium phthalocyanine compound with low absorptivity in the visible light region and high absorptivity in the near-infrared light region, and represented by the following Formula:
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: March 11, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Yu-Mi Chang, Ju-Sik Kang, Jeong-Ho Park
  • Herbal drug composition for cartilage protection
    Patent number: 8652537
    Abstract: The present invention relates to a herbal drug composition for cartilage protection comprising plant extracts of Clematis Radix, Trichosanthis Radix, and Prunellae Spica and an optimal content of rosmarinic acid to: (i) alleviate pains; (ii) inhibit the acute/chronic inflammation, platelet/whole blood aggregation, immunocyte (B-lymphcyte and T-lymphcyte) proliferation, inflammation-inducing enzyme activities, and enzyme activities associated with degradation of joint tissue; (iii) scavenge activity of toxic active oxygen radicals; and (iv) further provide excellent cartilage protection activity to be effectively used as an anti-inflammatory agent with analgesic effects, blood circulation enhancer, arthritis therapeutic agent and cartilage protective.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: February 18, 2014
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Chang-Kyun Han, Wie-Jong Kwak, Ki Won Joung, Hun Seung Yoo, Do Seung Kum, Yong-Baik Cho, Keun Ho Ryu, Hae In Rhee, Taek Su Kim, In Ho Jung, So Yoon Lee, Jung Bum Yi, Joo Hyon Kim, Key An Um
  • POLYLACTIC ACID RESIN FILM
    Publication number: 20140037931
    Abstract: The present invention relates to a polylactic acid resin film which has excellent flexibility, mechanical properties, stability, and transparency while having a specific biodegradability of the polylactic acid resin, and is useful as a packaging material. The present invention provides a polylactic acid resin film, comprising a polylactic acid resin including a hard segment comprising a specific polylactic acid repeating unit, and a soft segment comprising a polyurethane polyol repeating unit in which a specific polyether polyol repeating units are linearly linked via a urethane bond, wherein the total Young's modulus in both machine direction and transverse direction of the film is 350 to 750 kgf/mm2, and the total initial tensile strength in both machine direction and transverse direction of the film is 20 kgf/mm2 or more.
    Type: Application
    Filed: November 2, 2011
    Publication date: February 6, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Young-Man Yoo, Jae-Il Chung, Tae-Woong Lee, Kye-Yune Lee
  • COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME
    Publication number: 20140039149
    Abstract: 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—(CH2)n—CO—(CH2)b—OH (where a and b are integers in the range 1˜5), and ethylene glycol or other diols so that the sum of its entire diol composition is 100 mol % based on dicarboxylic acid. The copolymer polyester resin of the present invention enables reduction of cycle time, improvement of product processability and prevention of PET bottle deformation during mold processing with a heat-shrinking label by complementing low temperature shrinkage, maintaining a high shrinkage rate, and reducing shrinkage stress.
    Type: Application
    Filed: October 11, 2013
    Publication date: February 6, 2014
    Applicant: SK CHEMICALS CO., LTD.
    Inventors: Myoung Ruoul Lee, Jong Ryang Kim