Refrigerant compositions containing a compatibilizer
AssigneeE. I. Du Pont de Nemours and Company
InventorsWalter Mahler, Leo Ernest Manzer
Life of this patent
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Abstract
The present invention provides compositions that are useful for compatibilizing a conventional, non-polar, compression refrigeration lubricant and a hydrofluorocarbon and/or hydrochlorofluorocarbon refrigerant in a compression refrigeration apparatus. Additionally, these compositions promote efficient return of lubricant from the non-compressor zones to the compressor zones of the aforesaid refrigeration apparatus.
Claims6
A lubricant composition for use in compression refrigeration and air conditioning, comprising:
- (a) at least one lubricant selected from the group consisting of paraffins, napthenes, aromatics and poly-α-olefins;
- and
- (b) at least one compatibilizer selected from amides represented by the formulae R1CONR2R3 and cyclo-[R4CON(R5)—], wherein R1, R2, and R3 are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms and aromatic radicals having from 6 to 12 carbon atoms, and wherein one of R1, R2, and R3 is an aromatic radical having from 6 to 12 carbon atoms;
- R5 is selected from aromatic radicals having from 6 to 12 carbon atoms;
- R4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms;
- and wherein said amides have a molecular weight of from about 120 to about 300 atomic mass units and a carbon to oxygen ratio of from about 7 to about 20,
- wherein the weight ratio of said lubricant to said compatibilizer is from about 99:1 to about 1:1.
A refrigerant composition for use in compression refrigeration and air conditioning, comprising:
- (a) at least one halogenated hydrocarbon selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons;
- (b) at least one lubricant selected from the group consisting of paraffins, napthenes, aromatics and poly-α-olefins;
- and
- (c) at least one compatibilizer selected from amides represented by the formulae R1CONR2R3 and cyclo-[R4CON(R5)—], wherein R1, R2, R3 are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms and aromatic radicals having from 6 to 12 carbon atoms, wherein one of R1, R2, and R3 is an aromatic radical having from 6 to 12 carbon atoms;
- and R5 is selected from aromatic radicals having from 6 to 12 carbon atoms;
- R4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms;
- and wherein said amides have a molecular weight of from about 120 to about 300 atomic mass units and a carbon to oxygen ratio of from about 7 to about 20,
- wherein the weight ratio of said lubricant to said compatibilizer is from about 99:1 to about 1:1.
A refrigerant composition for use in compression refrigeration and air conditioning apparatus containing paraffinic, napthenic, aromatic and/or poly-α-olefinic lubricant, said refrigerant composition comprising:
- (a) at least one halogenated hydrocarbon selected from the group consisting of hydrofluorocarbons and hydrochlorofluorocarbons;
- and
- (b) at least one compatibilizer selected from amides represented by the formulae R1CONR2R3 and cyclo-[R4CON(R5)—], wherein R1, R2, and R3 are independently selected from aliphatic and alicyclic hydrocarbon radicals having from 1 to 12 carbon atoms aromatic radicals having from 6 to 12 carbon atoms, and wherein one of R1, R2, and R3 is an aromatic radical having from 6 to 12 carbon atoms;
- R5 is selected from aromatic radicals having from 6 to 12 carbon atoms;
- R4 is selected from aliphatic hydrocarbylene radicals having from 3 to 12 carbon atoms;
- and wherein said amides have a molecular weight of from about 120 to about 300 atomic mass units and a carbon to oxygen ratio of from about 7 to about 20.
Dependencies are inferred from the claim text.