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    COMPOSITION FOR ANTIFREEZE LIQUID OR COOLANT HAVING SUPERIOR CAVITATION EROSION- AND GAP CORROSION-RESISTANCE EFFECT
    2.
    发明公开
    COMPOSITION FOR ANTIFREEZE LIQUID OR COOLANT HAVING SUPERIOR CAVITATION EROSION- AND GAP CORROSION-RESISTANCE EFFECT 有权
    组合物技术防冻液或冷却液HIGH KAVITATIONSEROSIONS-和GAP耐蚀性

    公开(公告)号：EP2759583A4

    公开(公告)日：2015-05-27

    申请号：EP12834311

    申请日：2012-01-31

    Applicant: KUKDONG JEYEN CO LTD

    Inventor： PARK JAE YOON ,  JO CHANG YEOL ,  CHOI DONG YEOL

    IPC: C09K5/20 ,  C23F11/10 ,  C23F11/12

    CPC classification number: C09K5/20 ,  C23F11/10 ,  C23F11/122 ,  C23F11/124

    Abstract: The present invention relates to a composition for an antifreeze liquid or a coolant. The present invention provides the composition for the antifreeze liquid or the coolant comprising: (a) a glycol-based antifreeze agent; (b) a cyclo hexane dicarboxylic acid; and (c) a non-reduced polyol. Generally, a mixture of mono- or dicarboxylic acid, which is used as a corrosion inhibitor agent, and an inorganic additive is prone to cavitation erosion and corrosion of gaps, but when a composition is comprised by using in parallel the cyclo hexane dicarboxylic acid and the non-reduced polyol, a synergy effect is created, thereby exhibiting a superior corrosion prevention effect with respect to cavitation erosion and corrosion of gaps inside a cooling apparatus.

    COOLANT COMPOSITION FOR FUEL CELL
    4.
    发明公开
    COOLANT COMPOSITION FOR FUEL CELL 有权
    清凉剂组合物的燃料电池

    公开(公告)号：EP2586844A4

    公开(公告)日：2016-11-30

    申请号：EP11798328

    申请日：2011-06-08

    Applicant: KUKDONG JEYEN CO LTD ,  HYUNDAI MOTOR CO LTD ,  KIA MOTORS CORP

    Inventor： JO CHANG YEOL ,  LEE HONG KI ,  PARK JAE YOON ,  NA SUNG WOOK ,  PARK HUN-WOO

    IPC: C09K5/10 ,  C09K5/20 ,  H01M8/04

    CPC classification number: C09K5/00 ,  C09K5/10 ,  C09K5/20 ,  H01M8/04029

    Abstract: The present invention relates to a coolant composition for a fuel cell, comprising (a) an alkylene glycol, (b) deionized water, and (c) a compound containing a trimethylsilyl group. The compound containing a trimethylsilyl group of the composition of the present invention prevents the oxidation of the alkylene glycol, and thus the generation of an acid is 700 ppm or less. Additionally, the compound prevent the oxidation of the alkylene glycol, thereby inhibiting the generation of an ionic material, and thus the rate of change of electrical conductivity (conductivity after oxidation/initial conductivity) can be maintained to be 40 times or less. Therefore, the coolant composition for a fuel cell of the present invention can be used as a coolant for a cooling system of a fuel cell driving device with an electrical conductivity of 40 µs/cm or less even without being frozen in the winter.

    COMPOSITION HAVING ENHANCED CORROSION RESISTANCE AND PH BUFFERING PROPERTY FOR ANTIFREEZE LIQUID OR COOLANT
    5.
    发明公开
    COMPOSITION HAVING ENHANCED CORROSION RESISTANCE AND PH BUFFERING PROPERTY FOR ANTIFREEZE LIQUID OR COOLANT 审中-公开
    具有改进的耐腐蚀性和PH缓冲能力防冻液或冷却剂组合物

    公开(公告)号：EP2759582A4

    公开(公告)日：2015-07-08

    申请号：EP12832969

    申请日：2012-01-31

    Applicant: KUKDONG JEYEN CO LTD

    Inventor： PARK JAE YOON ,  JO CHANG YEOL ,  CHOI DONG YEOL

    IPC: C09K5/20 ,  C23F11/08

    CPC classification number: C09K5/20 ,  C23F11/08

    Abstract: The present invention relates to a composition for an antifreeze liquid or a coolant. The present invention provides the composition for the antifireeze liquid or the coolant comprising: (a) a cyclo hexane dicarboxylic acid; (b) an azole- or thiazole-based inhibitor; and (c) a metal from an element of group 2, group 5, group 6, or group 7. Generally, phosphate and silicate, which are organic additives that are added to a carboxylic acid, an anticorrosion agent, are quickly exhausted and are not very stable, thereby leading to blockage and corrosion due to scale and overheating due to blocking a core of a radiator, and do not provide long-term corrosion resistance with respect to parts made from aluminum and iron. However, the composition according to the present invention has increased corrosion resistance at a lower density by not containing organic additives, and has a better pH buffering property due to enhanced thermal oxidation stability at a high temperature. Even after a long-term operation for over 200000 km, the composition according to the present invention maintains a metal corrosion resistance capability, the appearance of a water pump impeller and the inside of a radiator tube comprising aluminum remains decent, and the composition has a superior corrosion resistance effect with respect to internal metal parts even after an operational test, thereby allowing use of the composition for the antifreeze liquid or the coolant having a long life.

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