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    • 2. 发明授权
    • Lubricant for refrigerators using ammonia refrigerant
    • 使用氨制冷剂的冰箱的润滑剂
    • US06335311B1
    • 2002-01-01
    • US09508961
    • 2000-03-20
    • Masato NamikiGoro YamamotoTakashi KaimaiHitoshi Takahashi
    • Masato NamikiGoro YamamotoTakashi KaimaiHitoshi Takahashi
    • C10M14526
    • C10M171/008C10M107/34C10M2201/00C10M2201/061C10M2201/16C10M2201/18C10M2209/107C10N2220/02C10N2240/00C10N2240/22C10N2240/30C10N2240/50C10N2240/52C10N2240/54C10N2240/56C10N2240/58C10N2240/60C10N2240/66
    • To provide a polyalkylene glycol-based refrigerant oil for refrigerators using ammonia as a refrigerant. The present invention provides a lubricant for refrigerators using ammonia refrigerant, comprising polyethers selected from the group consisting of a polyether represented by the following general formula (1) X—{—O—(AO)n—H}p  (1) (wherein X is a residue of a monool or polyol from which a hydroxyl group is eliminated; (AO)n is a polyoxyalkylene group formed by copolymerization of EO and an AO having 3 or more carbon atoms; n is 2 or more; and p is a valence of X) and having 50% or more of secondary hydroxyl groups among the hydroxyl groups located at the terminal of the structure based on the total hydroxyl groups, or a polyether represented by the following general formula (2) X—{—O—(AO1)a—(AO2)b—H}p  (2) (wherein X is a residue of a monool or polyol from which a hydroxyl group is eliminated; (AO1)n is a polyoxyalkylene group formed by copolymerization of ethylene oxide and propylene oxide and/or butylene oxide; AO2 is an oxyalkylene group having 3 or more carbon atoms; a is 2 or more; b is 1 or more; and p is a valence of X).
    • 提供一种使用氨作为制冷剂的制冷剂的聚亚烷基二醇系冷冻机油。本发明提供一种使用氨制冷剂的制冷机的润滑剂,其包含选自下述通式(1)表示的聚醚的聚醚(其中, X是除去羟基的一元醇或多元醇的残基;(AO)n是通过EO和具有3个或更多个碳原子的AO的共聚形成的聚氧化烯基; n是2以上; p是 X的化合价),并且在基于全部羟基的结构的末端的羟基中具有50%以上的仲羟基,或由以下通式(2)表示的聚醚(其中X为残基 的一元醇或多元醇,其中羟基被除去;(AO1)n是通过环氧乙烷和环氧丙烷和/或环氧丁烷的共聚形成的聚氧化烯基团; AO2是氧化烯 具有3个以上碳原子的基团; a是2以上; b为1以上; 并且p是X的化合价)。