IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0148561
(2002-10-30)
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우선권정보 |
GB-19990028683 (1999-12-03) |
국제출원번호 |
PCT/GB00/04580
(2000-11-30)
|
국제공개번호 |
WO01/40400
(2001-06-07)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Burns, Doane, Swecker & Mathis, L.L.P.
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인용정보 |
피인용 횟수 :
20 인용 특허 :
2 |
초록
▼
Refrigerant compositions are disclosed which comprise: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount of at least 35% based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroet
Refrigerant compositions are disclosed which comprise: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount of at least 35% based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane, trifluoromethoxypentafluoroethane, 1,1,2,3,3-heptafluoropropane or a mixture of two or more thereof, in an amount of at least 30% by weight based on the weight of the composition and (c) n-butane or isobutane, in an amount from 1% to less than 2.3% by weight based on the weight of the composition.
대표청구항
▼
1. A refrigerant composition which comprises: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount of at least 35% based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane,
1. A refrigerant composition which comprises: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount of at least 35% based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane, or trifluoromethoxypentafluoroethane, or a mixture of two or more thereof, in amount of at least 30% by weight based on the weight of the composition and (c) n-butane or isobutane, in amount from 1% to less than 2.3% by weight based on the weight of the composition, wherein that the total concentration of further component(s) does not exceed 30% by weight based on the weight of the composition. 2. A composition according to claim 1 in which component (c) is present in an amount above 1.0 up to 2.0% by weight based on the weight of the composition. 3. A composition according to claim 2 in which component (c) is present in an amount of about 1.5% by weight based on the weight of the composition. 4. A composition according to claim 1 in which component (a) is pentafluorethane. 5. A composition according to claim 4 in which component (a) is present in an amount from 35 to 65% by weight based on the weight of the composition. 6. A composition according to claim 5 in which component (a) is present in an amount from 40 to 55% by weight based on the weight of the composition. 7. A composition according to claim 6 in which component (a) is present in an amount from 45 to 52% by weight based on the weight of the composition. 8. A composition according to claim 1 in which component (b) is 1,1,1,2-tetrafluoroethane. 9. A composition according to claim 8 in which component (b) is present in an amount from 35 to 60% by weight based on the weight of the composition. 10. A composition according to claim 9 in which component (b) is present in an amount from 45 to 60% by weight based on the weight of the composition. 11. A composition according to claim 10 in which component (b) is present in an amount from 47.5 to 55% by weight based on the weight of the composition. 12. A composition according to claim 1 which components (a) and (b) each are present in an amount from 35 to 60% by weight based on the weight of the composition. 13. A composition according to claim 12 in which components (a) and (b) each are present in an amount from above 45 to 55% by weight based on the weight of the composition. 14. A composition according to claim 1 in which component (c) is n-butane. 15. A composition according to claim 1 which comprises a further component. 16. A composition according to claim 15 in which the further component is a hydrofluorocarbon. 17. A composition according to claim 16 in which the hydrofluorocarbon has a boiling point at atmospheric pressure of at most -40° C. 18. A composition according to claim 16 in which the F/H ratio in the hydrofluoromethane is at least 1. 19. A composition according to claim 18 in which the hydrofluorocarbon is difluoromethane or trifluoromethane. 20. A composition according to claim 15 in which the further component is present in an amount not exceeding 5% by weight based on the weight of (a), (b) and (c). 21. A composition according to claim 20 in which the further component is present in an amount not exceeding 2% by weight based on the weight of (a), (b) and (c). 22. A refrigerant in a refrigeration apparatus comprising the composition according to claim 1. 23. The process for producing refrigeration which comprises condensing a composition as claimed in claim 1 and thereafter evaporating the composition in the vicinity of a body to be cooled. 24. A refrigeration apparatus containing, as refrigerant, a composition as claimed in claim 1.
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