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    INSULATING OIL
    41.
    发明专利
    INSULATING OIL 失效

    公开(公告)号：JP2000306430A

    公开(公告)日：2000-11-02

    申请号：JP11488199

    申请日：1999-04-22

    Applicant: JAPAN ENERGY CORP

    Inventor： MORISHIMA YOSHIYUKI ,  FUJINO KENJI

    IPC: H01B3/20 ,  C10M129/10 ,  C10M129/14

    Abstract: PROBLEM TO BE SOLVED: To provide high electric characteristics such as a small tan δ max and flow charge max in addition to high oxidative stability by including a specified amount of each of sulfide type sulfur and a phenolic compound with mineral oil and/or synthetic oil as the main component. SOLUTION: Insulating oil contains 50 wt.ppm, preferably more than 100 wt.ppm but 1000 weight ppm or less, preferably 500 wt.ppm or less sulfide type sulfur, and 10 wt.ppm or more but less than 300 wt.ppm phenolic compound. The phenolic compound is preferably selected from formulas I, II, III. The phenolic compound is preferable to be 2,6-tertiary butyl paracresol. In the formulas, R11,13,15,18 are 3-12C branched chain alkyl; R12,16, are methyl, ethyl; R17 is 1-4C alkylene, alkylidene; R18 is H, 1-12C alkyl; R20 is H, methyl; and R12 is direct bonding or same as R17.

    HYDRAULIC OIL
    42.
    发明专利
    HYDRAULIC OIL 失效

    公开(公告)号：JPH11323365A

    公开(公告)日：1999-11-26

    申请号：JP15358798

    申请日：1998-05-18

    Applicant: COSMO SOGO KENKYUSHO KK ,  COSMO OIL CO LTD

    Inventor： KUDO TAKAHIRO ,  ONISHI TERUAKI

    IPC: C10M129/10 ,  C10M129/14 ,  C10M129/76 ,  C10M133/12 ,  C10M133/58 ,  C10M137/04 ,  C10M141/10 ,  C10N30/04 ,  C10N30/06 ,  C10N30/10 ,  C10N40/08

    Abstract: PROBLEM TO BE SOLVED: To provide a hydraulic oil which exhibits excellent stability against oxidation, extreme pressure properties, sludge formation inhibiting properties, and sludge resistance even under high-temp. and high-pressure conditions of a piston pump in an actual machine and can maintain these properties for a long period of time. SOLUTION: This hydraulic oil comprises: a mineral oil, a synthetic oil, or a mixed oil composed of these oils as a base oil; and, based on the total mass of the hydraulic oil, 0.01 to 1 mass % alkenyl succinimide or a derivative thereof, 0.1 to 5 mass % phosphoric ester, 0.05 to 0.5 mass % alkylated diphenylamine, and 0.05 to 0.5 mass % hindered phenols.

    LUBRICATING OIL COMPOSITION AND REFRIGERATION EQUIPMENT USING THE COMPOSITION
    43.
    发明专利
    LUBRICATING OIL COMPOSITION AND REFRIGERATION EQUIPMENT USING THE COMPOSITION 失效

    公开(公告)号：JPH10183150A

    公开(公告)日：1998-07-14

    申请号：JP34517396

    申请日：1996-12-25

    Applicant: MITSUBISHI ELECTRIC CORP

    Inventor： MIKI SHINSUKE ,  ENOMOTO JUNZO ,  TOYAMA SATORU

    IPC: C10M129/14 ,  C10M133/14 ,  C10N30/04 ,  C10N30/06 ,  C10N30/10 ,  C10N40/30

    Abstract: PROBLEM TO BE SOLVED: To obtain a lubricating oil composition capable of sufficiently suppressing the generation of sludge and useful for refrigeration equipment such as refrigerator and room air-conditioner by compounding a lubricating base oil component with an antioxidant and a specific polymerization inhibitor. SOLUTION: This composition contains (A) a lubricating base oil component composed of a mineral oil or a synthetic oil, (B) an antioxidant, (C) a polymerization inhibitor consisting of a compound of the formula at least one of R to R is an [(alkyl-substituted)hydroxyphenyl-substituted]alkyl, preferably an alkyl and the others are each H or an alkyl} and, as necessary, (D) a phosphorus- or sulfur-based anti-abrasion agent and (E) an epoxy-based hydrochloric acid scavenger. The amount of the component C is preferably 0.1-5wt.% based on the component A.

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