|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||C09K-005/04 C10M-171/00 C10M-169/04|
|§371/§102 date||20090520 (20090520)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 17|
The present invention provides a lubricating oil for a compression type refrigerator including a polyvinyl ether-based compound containing an alkylene glycol or polyoxyalkylene glycol unit and a vinyl ether unit in a molecule and having a molecular weight in a range of 300 to 3,000, and a dehydrating agent. The lubricating oil for a compression type refrigerator of the present invention has high miscibility and high viscosity index, and excellent in stability without degradation and alteration due to hydrolysis under carbon dioxide atmosphere.
1. A lubricating oil, comprising: 70% by mass or more of a polyvinyl ether-based compound containing an alkylene glycol or polyoxyalkylene glycol unit and a vinyl ether unit in a molecule, having a molecular weight in a range of 300 to 3,000 and a carbon/oxygen molar ratio of 4.0 or less, wherein the polyvinyl ether-based compound has a structure of formula (I): wherein R1, R2, and R3 each represent a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, which may be identical to or different from one another; Rb represents a divalent hydrocar...