知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

20 records (took 0.014 seconds)

    METHOD FOR PREPARING POLYTHIOL COMPOSITION
    1.
    发明申请
    METHOD FOR PREPARING POLYTHIOL COMPOSITION 有权

    公开(公告)号：US20210179552A1

    公开(公告)日：2021-06-17

    申请号：US17117407

    申请日：2020-12-10

    Applicant: SKC CO., LTD.

    Inventor： Jaeyoung PAI ,  Seung Mo HONG ,  Hyeon Myeong SEO ,  Junghwan SHIN ,  Jeongmoo KIM ,  Jung Hwan MYUNG ,  Hyuk Hee HAN

    IPC: C07C321/04 ,  C07C335/02 ,  C07C319/12

    Abstract: The embodiments relate to a process for preparing a polythiol composition, which comprises reacting a halogen compound or an alcohol compound with thiourea to prepare a thiouronium salt solution; and adding a basic solution to the thiouronium salt solution to hydrolyze it. The hydrolysis reaction is terminated when the area of peak A in the graph measured by gel permeation chromatography of the reactant in the hydrolysis step under certain conditions is 0.5% to 8% based on the total peak area. A tetrafunctional polythiol composition having high purity can be obtained. Thus, an optical lens having excellent color, transparency, and refractive index can be obtained.

    ISOCYANATE COMPOSITION FOR OPTICAL LENSES AND PROCESS FOR PREPARING THE SAME
    2.
    发明申请
    ISOCYANATE COMPOSITION FOR OPTICAL LENSES AND PROCESS FOR PREPARING THE SAME 审中-公开

    公开(公告)号：US20180334531A1

    公开(公告)日：2018-11-22

    申请号：US15980265

    申请日：2018-05-15

    Applicant: SKC CO., LTD.

    Inventor： Junghwan SHIN ,  Hyuk Hee HAN ,  Jongmin SHIM

    IPC: C08G18/76 ,  C08G18/38 ,  G02B1/04

    Abstract: An isocyanate composition is prepared from an amine composition, which comprises (a) 99% to less than 100% by weight of m-xylylenediamine; (b) greater than 0% to 0.5% by weight of p-xylylenediamine; and (c) greater than 0% to 0.5% by weight of at least one selected from the group consisting of benzylamine, 4-methylbenzylamine, and 4-cyanobenzylamine. Therefore, the isocyanate composition used in the preparation of a polythiourethane can be controlled to a specific composition in the synthesis thereof, which makes it possible to conveniently produce an optical lens with a high quality.

    PHOSPHORUS-BASED RELEASING AGENT, OPTICAL POLYMERIZABLE COMPOSITION COMPRISING SAME AND PREPARATION THEREOF
    7.
    发明申请
    PHOSPHORUS-BASED RELEASING AGENT, OPTICAL POLYMERIZABLE COMPOSITION COMPRISING SAME AND PREPARATION THEREOF 审中-公开

    公开(公告)号：US20190263846A1

    公开(公告)日：2019-08-29

    申请号：US16283185

    申请日：2019-02-22

    Applicant: SKC CO., LTD.

    Inventor： Seung Mo HONG ,  Jongmin SHIM ,  Jung Hwan MYUNG ,  Junghwan SHIN

    IPC: C07F9/09 ,  C08G18/38 ,  B29C33/60 ,  B29D11/00 ,  B29C39/02

    Abstract: Embodiments relate to a polymerizable composition comprising a phosphorus-based mold releasing agent for an optical use whose preparation process is improved, and a process for preparing the phosphorus-based mold releasing agent. The phosphorus-based mold releasing agents can be prepared more easily and conveniently by using phosphorous pentoxide, which can easily react with a monoalcohol and/or water at room temperature in the absence of a catalyst or a solvent. In addition, byproducts are not generated during the reaction. Thus, when a lens is produced by using the mold release agent obtained therefrom, it is possible to prevent a defective appearance of the lens that may be caused by byproducts, thereby further enhancing the appearance properties thereof. Further, since separate steps for removing byproducts, specifically, such steps as washing and filtration, are not required, wastewater is not generated. Thus, it is not only environmentally friendly, but the production cost can also be reduced as the process is simple.

    XYLYLENE DIISOCYANATE COMPOSITION WITH IMPROVED STABILITY AND REACTIVITY AND OPTICAL LENS USING THE SAME
    8.
    发明申请
    XYLYLENE DIISOCYANATE COMPOSITION WITH IMPROVED STABILITY AND REACTIVITY AND OPTICAL LENS USING THE SAME 审中-公开

    公开(公告)号：US20180334428A1

    公开(公告)日：2018-11-22

    申请号：US15980821

    申请日：2018-05-16

    Applicant: SKC CO., LTD.

    Inventor： Junghwan SHIN ,  Hyuk Hee HAN ,  Seung Mo HONG ,  Sang Mook KIM

    IPC: C07C263/18 ,  C07C265/14 ,  C08G18/38 ,  C08G18/76 ,  G02B1/04

    Abstract: The xylylene diisocyanate composition according to the embodiments has a chlorine content of 100 to 1,000 ppm to improve the stability, so that the degradation of the reactivity can be prevented even when it is stored for a long period of time. Therefore, even if the xylylene diisocyanate composition according to the embodiments is used after it has been stored for a long period of time for sale or the like, the xylylene diisocyanate composition can be polymerized with a thiol to produce a polythiourethane-based optical material having excellent properties such as refractive index, Abbe number, transparency, glass transition temperature, yellowness index, and the like. Therefore, it can be advantageously used in the field of eyeglass lenses, camera lenses, and the like.

    POLYTHIOURETHANE-BASED PLASTIC LENS
    10.
    发明申请
    POLYTHIOURETHANE-BASED PLASTIC LENS 审中-公开

    公开(公告)号：US20200339731A1

    公开(公告)日：2020-10-29

    申请号：US16960492

    申请日：2019-01-11

    Applicant: SKC CO., LTD.

    Inventor： Junghwan SHIN ,  Jung Hwan MYUNG ,  Jongmin SHIM ,  Hyuk Hee HAN

    IPC: C08G18/38 ,  C08G18/75 ,  C08G18/76 ,  G02B1/04

    Abstract: Embodiments relate to a polythiourethane-based plastic lens. When a polythiourethane-based plastic lens is polymerized according to the embodiment, the types, contents, and the like of the polythiol compounds and the isocyanate compounds are adjusted to control the storage moduli at room temperature and high temperatures, their variations, the energy attenuation (KEL) obtained therefrom, and the glass transition temperature, whereby the polythiourethane-based plastic lens thus obtained is enhanced in impact resistance and thermal resistance.

Patent Agency Ranking