KR950704437A - POLYOL ESTER LUBRICANTS FOR HIGH EFFICIENCY REFRIGERATORS - Google Patents

Abstract

The present invention relates to a near perfect lubricant for a high performance domestic cooler using chlorine free hydrofluorocarbon refrigerant working fluid. Effective amounts of mixtures of blocked polyols having up to four hydroxyl groups with esters based on acyl groups having primarily C ₅ or less carbon atoms and other esters can also be used satisfactorily.

Description

POLYOL ESTER LUBRICANTS FOR HIGH EFFICIENCY REFRIGERATORS

Since this is an open matter, no full text was included.

Claims (20)

A composition of matter suitable for use as a lubricant or lubricant raw material at 40 ° C., having a viscosity of up to 17 centistokes and consisting of a mixture of molecules, in a mixture of polyol ester molecules, (i) At least about 45% of the alcohol portion is TMP and at least about 75% of the remaining alcohols are selected from the group consisting of NPG, TME and PE, and (ii) at least 70% of the acyl groups are butanoyl, 2-methylpropanoyl , 2-methylbutanoyl and 3-methylbutanoyl. The process of claim 1, wherein (i) at least about 70% of the alcohol moieties are TMP, 75% of the remaining alcohols are selected from the group consisting of NPG, TMP, TME and PE, and (ii) at least 85% of the acyl groups A composition comprising a C ₅ carbon atom, wherein at least 85% of this C ₅ acyl group is a straight pentanoyl group, and (iii) the viscosity of the composition is less than or equal to about 15.0 centistosts at 40 ° C. The process of claim 2, wherein (i) at least about 78% of the alcohol moieties are TMP, 75% of the remaining alcohols are selected from the group consisting of NPG, TMP, TME and PE, and (ii) at least 85% of the acyl groups A composition comprising a C ₅ carbon atom, wherein at least 90% of this C ₅ acyl group is a straight pentanoyl group, and (iii) the viscosity of the composition is less than or equal to about 14.2 centistosts at 40 ° C. The process of claim 3, wherein (i) at least about 85% of the alcohol moieties are TMP, 75% of the remaining alcohols are selected from the group consisting of NPG, TMP, TME and PE, and (ii) at least 92% of the acyl groups A composition comprising a C ₅ carbon atom, wherein at least 90% of the C ₅ acyl groups are straight pentanoyl groups, and (iii) the viscosity of the composition is less than or equal to about 13.8 centistosts at 40 ° C. The method of claim 4, wherein (i) at least about 96% of the alcohol moieties are TMP, 75% of the remaining alcohols are selected from the group consisting of NPG, TMP, TME and PE, and (ii) at least 97% of the acyl groups A composition comprising a C ₅ carbon atom, wherein at least 93% of this C ₅ acyl group is a straight pentanoyl group, and (iii) the viscosity of the composition is less than or equal to about 11.3 centistost at 40 ° C. 95% by weight or more of the composition according to claim 5, and antioxidant and thermal stability improvers, metal deactivators, lubricity additives, corrosion inhibitors, viscosity improvers, melting point depressants, cleaning agents, dispersants, antifoam agents, antiwear agents and extreme pressure tablets A blended lubricant consisting of the remaining weight percent of one or more additives selected from the group consisting of starch additives. 92% by weight or more of the composition according to claim 3, and antioxidant and thermal stability improvers, metal deactivators, lubricity additives, corrosion inhibitors, viscosity improvers, melting point depressants, cleaning agents, dispersants, antifoam agents, antiwear agents and extreme pressure tablets A blended lubricant consisting of the remaining weight percent of one or more additives selected from the group consisting of starch additives. 92% by weight or more of the composition according to claim 2, and antioxidant and thermal stability improvers, metal deactivators, lubricity additives, corrosion inhibitors, viscosity improvers, melting point depressants, cleaning agents, dispersants, antifoam agents, antiwear agents and extreme pressure tablets A blended lubricant consisting of the remaining weight percent of one or more additives selected from the group consisting of starch additives. 92% by weight or more of the composition according to claim 1, and antioxidant and thermal stability improvers, metal deactivators, lubricity additives, corrosion inhibitors, viscosity improvers, melting point depressants, cleaning agents, dispersants, antifoam agents, antiwear agents and extreme pressure tablets A blended lubricant consisting of the remaining weight percent of one or more additives selected from the group consisting of starch additives. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of a lubricant according to claim 9. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of a lubricant according to claim 8. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of a lubricant according to claim 7. A refrigerant working fluid consisting of at least 85% by weight of 1,1,1,2-tetrafluoroethane and the remaining weight% of the lubricant according to claim 6. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of the lubricant according to claim 5. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of the lubricant according to claim 4. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of a lubricant according to claim 3. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of the lubricant according to claim 2. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A refrigerant working fluid consisting of a lubricant according to claim 1. A method for operating a refrigerator comprising circulating compression, liquefaction, expansion and evaporation of a heat transfer fluid composed of at least 85% by weight of 1,1,1,2-tetrafluroethane and the remaining weight% of the lubricant according to claim 6. 85% by weight or more of a primary heat transfer fluid selected from the group consisting of pentafluoroethane, 1, 1-difluoroethane, 1, 1, 1-trifluoroethane, tetrafluoroethane, and mixtures thereof, and the remaining weight A method of operating a freezer comprising circulating compression, liquefaction, expansion and evaporation of a heat transfer fluid consisting of a lubricant according to claim 1. ※ Note: The disclosure is based on the initial application.