# US 9,518,204 B2 · HFO refrigerant composition having improved slidability

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- Number: US 9,518,204 B2
- Document ID: US9518204B2
- Status: Granted
- Kind: B2
- Application number: 14/611,438
- Filed: 2015-02-02
- Published: 2015-07-02
- Granted: 2016-12-13
- Earliest claimed: 2010-11-30
- Assignees: Daikin Industries, Ltd.
- Applicants: Daikin Industries, Ltd.
- Inventors: Tatsumi Tsuchiya; Takashi Shibanuma
- Web page: https://patentgrep.com/patent/US9518204B2

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- C09K 2205/11: Ethers
- C09K 2205/126: Unsaturated fluorinated hydrocarbons
- C09K 2205/22: All components of a mixture being fluoro compounds
- C09K 2205/40: Replacement mixtures
- C10M 2203/06: Well-defined aromatic compounds
- C10M 2207/283: of polyhydroxy compounds
- C10M 2209/04: containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
- C10M 2209/103: Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M 2213/02: obtained from monomers containing carbon, hydrogen and halogen only
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2020/101: {Containing Hydrofluorocarbons}
- C10N 2030/02: Pour-point; Viscosity index
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- 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)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The present invention provides a highly stable HFO refrigerant composition for use in a vapor compression-type refrigeration system, having improved slidability for the sliding portions of the vapor compression-type refrigeration system. More specifically, the present invention provides an HFO refrigerant composition comprising at least one type of HFO refrigerant and a polymer of halogenated propene represented by C3HaFbClc (provided that a+b+c=6, a=an integer of 1 to 3, b=an integer of 3 to 5, and c=an integer of 0 to 1) that is an oligomer having a molecular weight of 200 to 900.

## Claims

### Claim 1

A method of improving slidability in a member selected from the group consisting of mobile air conditioners, refrigerators, turbo freezers, container freezers, household air conditioners, and industrial air conditions, comprising
combining an HFO refrigerant composition comprising at least one type of HFO refrigerant and a polymer of halogenated propene represented by C3HaFbClc (provided that a+b+c=6, a=an integer of 1 to 3, b=an integer of 3 to 5, and c=an integer of 0 to 1) that is an oligomer having a molecular weight of 200 to 900 with the member described above.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the HFO refrigerant is at least one member selected from the group consisting of 2,3,3,3-tetrafluoropropene (HFO-1234yf), (Z or E-)1,3,3,3-tetrafluoropropene (HFO-1234ze), (Z or E-) 1,2,3,3,3-pentafluoropropene (HFO-1225ye), 1,1,3,3,3-pentafluoropropene (HFO-1225zc), and 3,3,3-trifluoropropene (HFO-1243zf).

### Claim 3 (depends on 1)

The method according to claim 1 comprising the oligomer in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the HFO refrigerant.

### Claim 4 (depends on 1)

The method according to claim 1 further comprising a lubricant.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the lubricant is at least one member selected from the group consisting of polyalkylene glycols, polyol esters, polyvinyl ethers, and alkylbenzenes, having a kinematic viscosity at 40° C. of 5 to 400 cSt.