专利名称：Method for using thermally stable esters in
a lubricating oil for a refrigerating machine
发明人：Akimitsu Sakai,Toshiya Hagihara申请号：US08863049申请日：19970523公开号：US06228820B1公开日：20010508
专利附图：
摘要：An ester compound having thermal stability in the presence of a metalcharacterized in that the ester compound is formed between a dihydric to nonahydrichindered alcohol having 5-15 carbon atoms and a saturated aliphatic monocarboxylic acid
having 3-20 carbon atoms or a derivative thereof; that the ratio of a branched carboxylicacid or a derivative thereof to the entire carboxylic acids or derivatives thereof is not lessthan 50 mol %; that the hydroxyl value of the ester compound is not more than 30 mgKOH/g; and that the acid value after a sealed tube test is not more than 10 mg KOH/g;and a lubricating oil composition comprising the ester compound in an amount of notless than 50% by weight. The present invention provides an ester compound havingoutstandingly good thermal stability in the presence of a metal and a lubricating oilcomposition and a working fluid composition for a refrigerating machine comprising theester compound as the main component.
申请人：KAO CORPORATION
代理机构：Birch, Stewart, Kolasch and Birch, LLP
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