|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||252/068 ; 252/067 ; 508/579 ; 508/580|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 25 인용 특허 : 5|
(wherein R represents a hydrocarbon group which has 1 to 3 carbon atoms and may have ether bond in the group, and R' represents a hydrocarbon group which has 3 to 20 carbon atoms and may have ether bond in the group) as the main component. The above lubricating oil shows excellent compatibility with hydrofluorocarbon refrigerants containing pentafluoroethane which can replace chlorofluorocarbons causing environmental pollution, has a high volume intrinsic resistance, and exhibits excellent stability and lubricating property.
[ What is claimed is:] [1.]1. A lubricating oil for compression-type refrigerators comprising (1) a mixed hydrofluorocarbon refrigerant consisting of 20 to 80% by weight of pentafluoroethane and 80 to 20% by weight of at least one refrigerant selected from the group consisting of difluoromethane, 1,1,1-trifluoroethane and 1,1,1,2-tetrafluoroethane and (2) a polyvinyl ether compound having (a) a constituting unit represented by the following general formula (I):wherein R represents a hydrocarbon group which has 1 to 3 carbon atoms and may have ether bond ...