LUBRICATING OIL FOR COMPRESSION REFRIGERATORS (VERSIONS) Russian patent published in 1999 - IPC

FIELD: lubricating materials. SUBSTANCE: lubricating oil contains, as base material, polyvinyl ether compound with structural fragment depicted by formula I: (I) or polyvinyl ether compound containing structural fragments depicted by formulas I or II: (II) or mixture of these compounds. Carbon/oxygen molar ratio in indicated compounds range from 4.2 to 7.0. Another version provides lubricating oil based on polyvinyl ether containing two types of structural units having common formula I with different R⁵ radicals. Oil is distinguished by excellent compatibility with fluorocarbons such as 1,1,1,2-tetrafluoroethane and chlorofluorocarbons which can be used instead of environmental pollutants such as dichlorodifluoromethane. EFFECT: reduced hygroscopicity and increased stability and lubrication characteristics. 19 cl, 10 tbl