# US 8,465,664 B2 · Refrigerant composition

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- Number: US 8,465,664 B2
- Document ID: US8465664B2
- Status: Granted
- Kind: B2
- Application number: 13/118,304
- Filed: 2011-05-27
- Published: 2011-09-22
- Granted: 2013-06-18
- Earliest claimed: 2006-03-03
- Assignees: RPL Holdings Limited
- Applicants: John Edward Poole; Richard Powell
- Inventors: John Edward Poole; Richard Powell
- Web page: https://patentgrep.com/patent/US8465664B2

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- C09K 2205/12: Hydrocarbons
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A refrigerant composition consists essentially of three hydrofluorocarbon components selected from HFC134a, HFC125 and HFC143a and an additive selected from a saturated or unsaturated hydrocarbon or mixture thereof boiling in the range −50° C. and +40° C.

## Claims

### Claim 1

A refrigerant composition consisting essentially of a refrigerant consisting of:
a non-flammable combination of hydrofluorocarbon and hydrocarbon components formulated as a replacement for chlorofluorocarbon refrigerant R22, consisting of a mixture of:
R134a
25 to 10%
R125
46 to 74.7%
R143a
15 to 25%
Isobutane
0.3 to 4%.

### Claim 2 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the refrigerant consists of:
R134a
14 to 17%
R125
71.4 to 59%
R143a
14 to 20%
Isobutane
0.6 to 4%.

### Claim 3 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the refrigerant consists of:
R134a
16.2%
R125
63%
R143a
18%
Isobutane
2.8%.

### Claim 4 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the refrigerant is one selected from the group consisting of:
(i)
R134a
15.7%
R125
63%
R143a
18%
Isobutane
3.3%
(ii)
R134a
15.8%
R125
63%
R143a
18%
Isobutane
3.2%
(iii)
R134a
15.9%
R125
63%
R143a
18%
Isobutane
3.1%
(iv)
R134a
16%
R125
63%
R143a
18%
Isobutane
3%
(v)
R134a
16.1%
R125
63%
R143a
18%
Isobutane
2.9%
(vi)
R134a
16.3%
R125
63%
R143a
18%
Isobutane
2.7%
(vii)
R134a
16.4%
R125
63%
R143a
18%
Isobutane
2.6%
(viii)
R134a
16.5%
R125
63%
R143a
18%
Isobutane
2.5%
(ix)
R134a
16%
R125
64%
R143a
18%
Isobutane
2%
(x)
R134a
15.7%
R125
65%
R143a
16%
Isobutane
3.3%
(xi)
R134a
15.8%
R125
65%
R143a
16%
Isobutane
3.2%
(xii)
R134a
15.9%
R125
65%
R143a
16%
Isobutane
3.1%
(xiii)
R134a
16%
R125
65%
R143a
16%
Isobutane
3%
(xiv)
R134a
16.1%
R125
65%
R143a
16%
Isobutane
2.9%
(xv)
R134a
16.2%
R125
65%
R143a
16%
Isobutane
2.8%
(xvi)
R134a
16.3%
R125
65%
R143a
16%
Isobutane
2.7%
(xvii)
R134a
16.4%
R125
65%
R143a
16%
Isobutane
2.6%
(xviii)
R134a
16.5%
R125
65%
R143a
16%
Isobutane
2.5%
(xix)
R134a
15.8%
R125
67%
R143a
14%
Isobutane
3.2%
(xx)
R134a
15.9%
R125
67%
R143a
14%
Isobutane
3.1%
(xxi)
R134a
16%
R125
67%
R143a
14%
Isobutane
3%
(xxii)
R134a
16.1%
R125
67%
R143a
14%
Isobutane
2.9%
(xxii)
R134a
16.2%
R125
67%
R143a
14%
Isobutane
2.8%
(xxiv)
R134a
16.3%
R125
67%
R143a
14%
Isobutane
2.7%
(xxv)
R134a
16.4%
R125
67%
R143a
14%
Isobutane
2.6%
(xxvi)
R134a
16.5%
R125
67%
R143a
14%
Isobutane
2.5%.

### Claim 5 (depends on 1)

A refrigerant composition as claimed in claim 1 which when allowed to leak under conditions specified by ASHRAE Standard 34 does not generate a liquid or vapour mixture with a hydrocarbon content greater than 5 weight %.

### Claim 6 (depends on 1)

A refrigerant composition as claimed in claim 1 which when allowed to leak under conditions specified by ASHRAE Standard 34 does not generate a liquid or vapour mixture with a hydrocarbon content greater than 4 weight %.

### Claim 7 (depends on 1)

A refrigerant composition as claimed in claim 1 in which the weight percent of hydrocarbon does not vary by more than 0.5% when the composition under isothermal vapour leaks at 23° C.

### Claim 8 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the composition is contained in an air conditioning or refrigeration unit with a mineral or alkylbenzene oil, synthetic hydrocarbon or synthetic oxygen containing lubricant.

### Claim 9 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the composition is contained in an air conditioning or refrigeration unit in which the lubricant is a mixture of hydrocarbon and oxygen containing lubricants.

### Claim 10 (depends on 1)

A refrigerant composition as claimed in claim 1 wherein the composition is contained in a refrigerating unit in which the lubricant is a mixture of hydrocarbon and oxygen containing lubricants.