Random copolymer oil return agents

摘要

The present invention relates to polymeric oil-return agents which solubilize or disperse mineral oil and/or synthetic oil lubricants with hydrofluorocarbon, hydrochlorofluorocarbon, and hydrofluoroolefin-based refrigerants and refrigerant compositions containing them. The polymeric oil-return agents are random copolymers containing less than about 30 wt % fluorine and produced from at least one monomer providing compatibility with the oil phase and at least one monomer providing compatibility with the refrigerant phase. The polymeric oil-return agents provide for more efficient return of mineral oil and/or synthetic oil lubricants from non-compressor zones back to a compressor zone in a refrigeration system.

主权项

1. A refrigerant composition, comprising:
(a) a halogenated hydrocarbon containing at least one carbon atom and at least one fluorine atom; (b) at least one oil selected from the group consisting of paraffin oils, naphthene oils, aromatic oils, alkylaryl oils, synthetic paraffin oil s and polyalphaolefin oils; and (c) a polymeric oil-return agent comprising a random copolymer free of fluorine and consisting of at least two different monomer types selected from the goup consisting of butyl acrylate, lauryl acrylate and lauryl methacrylate.