# US 2019/0316016 A1 · Composition for heat cycle system, and heat cycle system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0316016 A1
- Document ID: US20190316016A1
- Status: Published application
- Kind: A1
- Application number: 16/453,092
- Filed: 2019-06-26
- Published: 2019-10-17
- Earliest claimed: 2014-02-20
- Assignees: AGC Inc.
- Applicants: AGC Inc.
- Inventors: Masato FUKUSHIMA; Hiroaki Mitsuoka; Mai Tasaka; Daisuke Shirakawa; Hirokazu Takagi; Takeaki Arai
- Web page: https://patentgrep.com/patent/US20190316016A1

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- F25B 1/00: Compression machines, plants or systems with non-reversible cycle (F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence)
- F25B 31/002: {Lubrication}
- F25B 43/00: Arrangements for separating or purifying gases or liquids (in analysers or rectifiers F25B33/00); Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat (F25B40/00 takes precedence)
- C09K 2205/122: Halogenated hydrocarbons
- C09K 2205/126: Unsaturated fluorinated hydrocarbons
- C09K 2205/22: All components of a mixture being fluoro compounds
- C09K 2205/40: Replacement mixtures
- C10M 2207/2835: used as base material
- C10M 2209/043: used as base material
- C10N 2020/02: Viscosity; Viscosity index
- C10N 2020/101: {Containing Hydrofluorocarbons}
- C10N 2030/02: Pour-point; Viscosity index
- C10N 2040/16: Dielectric; Insulating oil {or insulators}
- C10N 2040/30: Refrigerators lubricants {or compressors lubricants}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

A composition for a heat cycle system and a heat cycle system employing the composition are provided. The composition has favorable lubricating properties and contains a working fluid for heat cycle and a refrigerant oil. The working fluid has a low global warming potential and can replace R410A. The working fluid contains an unsaturated fluorinated hydrocarbon compound having a specific structure. The refrigerant oil has a breakdown voltage of at least 25 kV, a hydroxyl value of at most 0.1 mgKOH/g, and a kinematic viscosity at 40° C. of from 5 to 200 mm2/s and a kinematic viscosity at 100° C. of from 2 to 30 mm2/s.

## Claims

### Claim at position 1

1-14. (canceled)

### Claim 15

A composition for a heat cycle system, comprising:
a working fluid containing trifluoroethylene and 2,3,3,3-tetrafluoropropene as unsaturated fluorinated hydrocarbon compounds, and optionally at least one other unsaturated fluorinated hydrocarbon compound containing at least one carbon-carbon unsaturated bond and represented by formula (I):
CxFyRz (I)
wherein R is H or Cl, x is an integer of from 2 to 6, y is an integer of from 1 to 12, and z is an integer of from 0 to 11, provided that 2x≥y+z≥2, and
a refrigerant oil having a breakdown voltage of at least 25 kV, a hydroxyl value of at most 0.1 mgKOH/g, and a kinematic viscosity at 40° C. of from 5 to 200 mm2/s and a kinematic viscosity at 100° C. of from 1 to 100 mm2/s.

### Claim 16 (depends on 15)

The composition according to claim 15, wherein the working fluid contains at least one other unsaturated fluorinated hydrocarbon compound of the formula (I) with x being 2 or 3.

### Claim 17 (depends on 16)

The composition according to claim 16, wherein the other unsaturated fluorinated hydrocarbon compound of the formula (I) is at least one selected from the group consisting of 1,2-difluoroethylene, 2-fluoropropene, 1,1,2-trifluoropropene, (E)-1,2,3,3,3-pentafluoropropene, (Z)-1,2,3,3,3-pentafluoropropene, (E)-1,3,3,3-tetrafluoropropene, (Z)-1,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropene.

### Claim 18 (depends on 15)

The composition according to claim 15, wherein the working fluid further contains at least one saturated fluorinated hydrocarbon compound selected from the group consisting of trifluoromethane, difluoromethane, difluoroethane, trifluoroethane, tetrafluoroethane, pentafluoroethane, trifluoroiodomethane, pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane and heptafluorocyclopentane.

### Claim 19 (depends on 15)

The composition according to claim 15, wherein trifluoroethylene is contained in a content of from 20 to 80 mass % per 100 mass % of the working fluid.

### Claim 20 (depends on 15)

The composition according to claim 15, wherein the refrigerant oil is at least one selected from the group consisting of a polyol ester refrigerant oil and a polyvinyl ether refrigerant oil.

### Claim 21 (depends on 15)

The composition according to claim 15, further comprising:
at least one additive selected from the group consisting of a copper deactivator, an extreme-pressure agent, an oil agent, an antioxidant, an acid scavenger, an antifoaming agent and a polymerization inhibitor.

### Claim 22 (depends on 15)

A heat cycle system, comprising:
the composition according to claim 15.

### Claim 23

A composition for a heat cycle system, comprising:
a working fluid containing difluoromethane as a saturated fluorinated hydrocarbon compound, trifluoroethylene as an unsaturated fluorinated hydrocarbon compound, and optionally at least one other unsaturated fluorinated hydrocarbon compound containing at least one carbon-carbon unsaturated bond and represented by formula (I):
CxFyRz (I)
wherein R is H or Cl, x is an integer of from 2 to 6, y is an integer of from 1 to 12, and z is an integer of from 0 to 11, provided that 2x≥y+z≥2; and
a refrigerant oil having a breakdown voltage of at least 25 kV, a hydroxyl value of at most 0.1 mgKOH/g, and a kinematic viscosity at 40° C. of from 5 to 200 mm2/s and a kinematic viscosity at 100° C. of from 1 to 100 mm2/s.

### Claim 24 (depends on 23)

The composition according to claim 23, wherein the working fluid contains at least one other unsaturated fluorinated hydrocarbon compound of the formula (I) with x being 2 or 3.

### Claim 25 (depends on 24)

The composition according to claim 24, wherein the other unsaturated fluorinated hydrocarbon compound of the formula (I) is at least one selected from the group consisting of 2,3,3,3-tetrafluoropropene, 1,2-difluoroethylene, 2-fluoropropene, 1,1,2-trifluoropropene, (E)-1,2,3,3,3-pentafluoropropene, (Z)-1,2,3,3,3-pentafluoropropene, (E)-1,3,3,3-tetrafluoropropene, (Z)-1,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropene.

### Claim 26 (depends on 23)

The composition according to claim 23, wherein the working fluid further contains at least one other saturated fluorinated hydrocarbon compound selected from the group consisting of trifluoromethane, difluoroethane, trifluoroethane, tetrafluoroethane, pentafluoroethane, trifluoroiodomethane, pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane and heptafluorocyclopentane.

### Claim 27 (depends on 23)

The composition according to claim 23, wherein trifluoroethylene is contained in a content of from 20 to 80 mass % per 100 mass % of the working fluid.

### Claim 28 (depends on 23)

The composition according to claim 23, wherein difluoromethane is contained in a content of from 20 to 80 mass % per 100 mass % of the working fluid.

### Claim 29 (depends on 23)

The composition according to claim 23, wherein the refrigerant oil is at least one selected from the group consisting of a polyol ester refrigerant oil and a polyvinyl ether refrigerant oil.

### Claim 30 (depends on 23)

The composition according to claim 23, further comprising:
at least one additive selected from the group consisting of a copper deactivator, an extreme-pressure agent, an oil agent, an antioxidant, an acid scavenger, an antifoaming agent and a polymerization inhibitor.

### Claim 31 (depends on 23)

A heat cycle system, comprising:
the composition according to claim 23.