HFO refrigerant composition having improved slidability

• US 8,980,119 B2
• Filed: 11/29/2011
• Issued: 03/17/2015
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: Tsuchiya, Tatsumi, Shibanuma, Takashi
• Primary Examiner(s): HARDEE, JOHN R
• Application Number:
  US13/884,297
• Publication Number:
  US 20130234062A1
• Time in Patent Office: 1,204 Days
• Field of Search: 252/68
• US Class Current: 252/68
• CPC Class Codes: C09K 2205/11 Ethers
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 2205/22 All components of a mixture being fluoro compounds
• CPC Class Codes: C09K 2205/40 Replacement mixtures
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2203/06 Well-defined aromatic compounds
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: 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
• CPC Class Codes: C10M 2209/103 Polyethers, i.e. containing di- or higher polyoxyalkylene groups
• CPC Class Codes: C10M 2213/02 obtained from monomers containing carbon, hydrogen and halogen only
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2020/101 Containing Hydrofluorocarbons
• CPC Class Codes: C10N 2030/02 Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2040/30 Refrigerators lubricants or compressors lubricants

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 C₃H_aF_bCl_c (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

1. An HFO refrigerant composition comprising at least one type of HFO refrigerant and a polymer of halogenated propene represented by C₃H_aF_bCl_c (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.

2. The HFO refrigerant composition 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).

3. The HFO refrigerant composition 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.

4. The HFO refrigerant composition according to claim 1 further comprising a lubricant.

5. The HFO refrigerant composition 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.

6. The HFO refrigerant composition according to claim 1, wherein the HFO refrigerant composition is used for at least one member selected from the group consisting of mobile air conditioners, refrigerators, turbo freezers, container freezers, household air conditioners, and industrial air conditioners.