Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
  • C09K5/02—Materials undergoing a change of physical state when used
  • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
  • C08J9/143—Halogen containing compounds
  • C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
  • C08J9/146—Halogen containing compounds containing carbon, halogen and hydrogen only only fluorine as halogen atoms
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K3/00—Materials not provided for elsewhere
  • C09K3/30—Materials not provided for elsewhere for aerosols
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
  • C09K5/02—Materials undergoing a change of physical state when used
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
  • C09K5/02—Materials undergoing a change of physical state when used
  • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
  • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
  • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
  • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/50—Solvents
  • C11D7/5036—Azeotropic mixtures containing halogenated solvents
  • C11D7/504—Azeotropic mixtures containing halogenated solvents all solvents being halogenated hydrocarbons
  • C11D7/5063—Halogenated hydrocarbons containing heteroatoms, e.g. fluoro alcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2205/00—Foams characterised by their properties
  • C08J2205/04—Foams characterised by their properties characterised by the foam pores
  • C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2207/00—Foams characterised by their intended use
  • C08J2207/04—Aerosol, e.g. polyurethane foam spray
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
  • C09K2205/10—Components
  • C09K2205/12—Hydrocarbons
  • C09K2205/122—Halogenated hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
  • C09K2205/10—Components
  • C09K2205/12—Hydrocarbons
  • C09K2205/126—Unsaturated fluorinated hydrocarbons

Definitions

• the present invention relates generally to azeotrope-like compositions comprising trifluoroiodomethane, and uses thereof. More specifically, the present invention provides binary azeotrope-like compositions of 1,1 -difluoroethane and trifluoroiodomethane, ternary azeotrope-like compositions of 1,1 -difluoroethane, trans- 1,1, 1,3 -tetrafluoropropene and trifluoroiodomethane, and uses thereof.
• HFCs hydrofluorocarbons
• CFCs chlorofluorocarbons
• HCFCs hydrochlorofluorocarbons
• the present inventors have developed several compositions comprising trifluoroiodomethane that help to satisfy the continuing need for alternatives to CFCs and HCFCs.
• the present invention provides azeotrope-like compositions comprising 1,1 -difluoroethane ("HFC- 152a”), and trifluoroiodomethane ("CF I").
• the present invention provides azeotrope-like compositions comprising 1,1 -difluoroethane ("HFC- 152a”), trans- 1,1,1,3-tetrafluoropropene (“transHFO-1234ze”) and trifluoroiodomethane ("CF 3 I”).
• HFC- 152a 1,1 -difluoroethane
• transHFO-1234ze trans- 1,1,1,3-tetrafluoropropene
• CF 3 I trifluoroiodomethane
• the preferred compositions of the invention tend to exhibit characteristics which make them particularly desirable for use in a number of applications, including as refrigerants in automotive air conditioning and heat pump systems, and in stationary air conditioning and refrigeration.
• GWPs global warming potentials
• GWPs global warming potentials
• the present compositions tend also to have similar or higher refrigeration capacity than many conventional HFC refrigerants, for example, HFC- 134a. Accordingly, the present compositions are suitable for use to great advantage as replacements for CFCs such as dichlorodifluormethane (CFC-12), HCFCs, such as chlorodifluoromethane (HCFC-22), and HFCs, such as tetrafluoroethane (HFC- 134a) and combinations of HFCs and CFCs, such as the combination of CFC-12 and 1,1-difluorethane (HFC- 152a) (the combination CFC-12:HFC-152a in a 73.8:26.2 mass ratio being known as R-500) in refrigerant, aerosol, and other applications.
• CFCs such as dichlorodifluormethane (CFC-12)
• HCFCs such as chlorodifluoromethane (HCFC-22)
• HFCs such as tetrafluor
• the present invention provides methods of producing an azeotrope- like composition comprising combining HFC- 152a and CF 3 I in amounts effective to produce an azeotrope-like composition, and in other embodiments, methods of producing an azeotrope-like composition comprising combining HFC- 152a, HFO-
• HFO-1234 is used herein to refer to all tetrafluoropropenes. Among the tetrafluoropropenes are included HFO-1234yf and both cis- and trans- 1, 1, 1, 3-tetrafluoropropene (HFO-1234ze).
• HFO-1234ze is used herein generically to refer to 1, 1, 1, 3-tetrafluoropropene, independent of whether it is the cis- or trans- form.
• cisHFO-1234ze and "transHFO-1234ze” are used herein to describe the cis- and trans- forms of 1, 3, 3, 3-tetrafluoropropene respectively.
• HFO-1234ze therefore includes within its scope cisHFO-1234ze, transHFO-1234ze, and all combinations and mixtures of these.
• properties of cisHFO-1234ze and transHFO-1234ze differ in at least some respects, and while the present azeotrope-like compositions are based mainly on transHFO-1234ze, it is contemplated that the cisHFO-1234ze form may be present in certain embodiments in amounts which do not negate the essential nature of the azeotrope-like composition.
• HFO-1234ze and 1, 1, 1, 3-tetrafluoropropene refer to both stereo isomers, and the use of this term is intended to indicate that each of the cis-and trans- forms applies and or is useful for the stated purpose unless otherwise indicated.
• EP 974,571 discloses the preparation of 1,1,1,3- tetrafluoropropene by contacting 1,1,1,3,3-pentafluoropropane (HFC-245fa) in the vapor phase with a chromium-based catalyst at elevated temperature, or in the liquid phase with an alcoholic solution of KOH, NaOH, Ca(OH) 2 or Mg(OH) 2
• HFC-245fa 1,1,1,3,3-pentafluoropropane
• azeotrope-like compositions of the present invention exhibit properties that make them advantageous for use as, or in, numerous applications, including as heat transfer compositions (including as refrigerants in automotive air conditioning and heat pump systems, and in stationary air conditioning, heat pump and refrigeration systems), blowing agents, propellants and sterilizing agents. Accordingly, in yet other embodiments, the present invention provides refrigerant compositions and methods associated with these and other uses.
• Azeotrope-like Compositions As used herein, the term "azeotrope-like" is intended in its broad sense to include both compositions that are strictly azeotropic and compositions that behave like azeotropic mixtures. From fundamental principles, the thermodynamic state of a fluid is defined by pressure, temperature, liquid composition, and vapor composition.
• An azeotropic mixture is a system of two or more components in which the liquid composition and vapor composition are equal at the stated pressure and temperature. In practice, this means that the components of an azeotropic mixture are constant-boiling and cannot be separated during a phase change.
• the azeotrope-like compositions of the invention may include additional components that do not form new azeotrope-like systems, or additional components that are not in the first distillation cut.
• the first distillation cut is the first cut taken after the distillation column displays steady state operation under total reflux conditions.
• One way to determine whether the addition of a component forms a new azeotrope-like system so as to be outside of this invention is to distill a sample of the composition with the component under conditions that would be expected to separate a non-azeotropic mixture into its separate components. If the mixture containing the additional component is non- azeotrope-like, the additional component will fractionate from the azeotrope-like components.
• azeotrope-like compositions there is a range of compositions containing the same components in varying proportions that are azeotrope-like or constant boiling. All such compositions are intended to be covered by the terms "azeotrope-like" and "constant boiling". As an example, it is well known that at differing pressures, the composition of a given azeotrope will vary at least slightly, as does the boiling point of the composition.
• an azeotrope of A and B represents a unique type of relationship, but with a variable composition depending on temperature and or pressure. It follows that, for azeotrope-like compositions, there is a range of compositions containing the same components in varying proportions that are azeotrope-like. All such compositions are intended to be covered by the term azeotrope-like as used herein. It is well-recognized in the art that it is not possible to predict the formation of azeotropes. (See, for example, U.S. Patent No. 5,648,017 (column 3, lines 64-65) and U.S. Patent No. 5,182,040 (column 3, lines 62-63), both of which are incorporated herein by reference). Applicants have discovered unexpectedly that HFC-152a and CF 3 I, and also HFC-152a, HFO-1234 and CF 3 I from azeotrope-like compositions.
• the azeotrope-like compositions of the present invention comprise, and preferably consist essentially of, effective azeotrope-like amounts of HFC-152a and CF 3 I.
• effective azeotrope-like amounts refers to the amount of each component which upon combination with the other components, results in the formation of an azeotrope-like composition of the present invention.
• the present azeotrope-like compositions comprise, and preferably consist essentially of, from about 35 to about 55 weight percent of HFC- 152a and from about 45 to about 65 weight percent of CF I, and even more preferably, from 35 to about 43 weight percent of HFC- 152a and from about 57 to about 65 weight percent of CF 3 I .
• the weight percents disclosed herein are based on the total weight of HFC-152a and CF I in a composition.
• the azeotrope-like compositions described herein preferably have a boiling point of from about -23°C to about -28°C at a pressure of about 14.42 psia.
• the present azeotrope-like compositions have a boiling point of from about -24°C to about -28°C at a pressure of about 14.42 psia, in even more preferred embodiments, from about - 25°C to about -28°C at a pressure of about 14.42 psia, and in even more preferred embodiments, from about -26°C to about -27.5°C at a pressure of about 14.42 psia.
• the azeotrope-like compositions of the present invention can be produced by combining effective azeotrope-like amounts of HFC- 152a and CF 3 I.
• HFC- 152a and CF 3 I can be mixed, blended, or otherwise contacted by hand and/or by machine, as part of a batch or continuous reaction and/or process, or via combinations of two or more such steps.
• HFC- 152a and CF 3 I can be mixed, blended, or otherwise contacted by hand and/or by machine, as part of a batch or continuous reaction and/or process, or via combinations of two or more such steps.
• those of skill in the art will be readily able to prepare azeotrope-like compositions according to the present invention without undue experimentation.
• the azeotrope-like compositions of the present invention comprise, and preferably consist essentially of, effective azeotrope-like amounts of HFC-152a, HFO-1234 (particularly and preferably trans-HFO-1234ze) and CF 3 I.
• the present azeotrope-like compositions comprise, and preferably consist essentially of, from about 10 to about 95 weight percent of HFC-152a, from about 1 to about 70 weight percent of CF 3 I, and from greater than zero to about 70 weight percent of transHFO-1234ze.
• the present azeotrope-like compositions comprise, and preferably consist essentially of, from about 20 to about 95 weight percent of HFC- 152a, from about 1 to about 65 weight percent of CF I, and from greater than zero to about 65 weight percent of transHFO-1234ze.
• Certain even more preferred compositions comprise: from about 20 to about 95 weight percent of HFC- 152a, from about 1 to about 65 weight percent of CF 3 I, and from greater than 0 to about 25 weight percent of transHFO-1234ze; and from about 20 to about 40 weight percent of HFC- 152a, from about 35 to about 65 weight percent of CF I, and from greater than 0 to about 15 weight percent of transHFO-1234ze.
• the weight percents disclosed herein are based on the total weight of HFC- 152a, CF 3 I, and transHFO-1234ze in a composition.
• the azeotrope-like compositions described herein preferably have a boiling point of from about -23°C to about -28°C at a pressure of about 14.42 psia.
• the present azeotrope-like compositions have a boiling point of from about -24°C to about -27°C at a pressure of about 14.42 psia, and in even more preferred embodiments, from about -24.5°C to about -26.7°C at a pressure of about 14.42 psia.
• the azeotrope-like compositions of the present invention can be produced by combining effective azeotrope-like amounts of HFC-152a, HFO-1234 and CF I. Any of a wide variety of methods known in the art for combining three or more components to form a composition can be adapted for use in the present methods to produce an azeotrope-like composition.
• HFC- 152a, HFO-1234 and CF 3 I can be mixed, blended, or otherwise contacted by hand and or by machine, as part of a batch or continuous reaction and/or process, or via combinations of two or more such steps.
• composition Additives may further include any of a variety of optional additives including lubricants, stabilizers, metal passivators, corrosion inhibitors, flammability suppressants, and the like.
• the azeotrope-like compositions of the present invention further comprise a stabilizer. Any of a variety of compounds suitable for stabilizing an azeotrope-like composition of the present invention may be used.
• stabilizer compositions comprising stabilizing diene-based compounds, and/or phenol compounds, and/or epoxides selected from the group consisting of aromatic epoxides, alkyl epoxides, alkenyl epoxides, and combinations of two or more thereof.
• epoxides selected from the group consisting of aromatic epoxides, alkyl epoxides, alkenyl epoxides, and combinations of two or more thereof.
• diiene-based compound refers to C3 - C5 dienes and to compounds formed by reaction of any two or more C3 - C5 dienes.
• the molecules which are combined can be the same or different.
• Certain of the preferred compositions comprise at least one diene-based compound in an amount effective under conditions of use to stabilize the iodocarbon against degradation.
• the type and nature of the diene-based compound(s) to be used may depend, to at least some degree, upon the particular iodocarbon compound(s) being used in the composition, the expected conditions of use of the compositions, and related factors.
• the amount of the diene-based stabilizer used in the compositions of the present invention can vary widely, depending upon factors such as the type of iodocarbon in the composition, the expected conditions of use of the composition, among other factors. In general, it is preferred to use diene-based stabilizer in an effective amount relative to the iodocarbon being used.
• the term "effective amount” refers to an amount of diene-based compound(s) which, when added to a composition comprising the relevant iodocarbon compound, such as trifluoroiodomethane, results in a stabilized composition wherein the iodocarbon degrades more slowly and/or to lesser degree relative to the same composition, under the same, or similar, conditions, but in the absence of the diene-based compounds.
• the relevant iodocarbon compound such as trifluoroiodomethane
• trifluoroiodomethane one of the important potential breakdown products under certain severe conditions is trifluoromethane, which is formed by the substitution of hydrogen for iodine in the CF I molecule.
• the amount of the diene-based compound(s) is sufficient to result in a stabilized composition wherein at least one of the iodocarbon compound(s) therein degrades more slowly and/or to a lesser degree relative to the same composition but in the absence of the diene-base compound, when tested according to SAE J1662 (issued
• the amount of breakdown product that is product formed by the substitution of hydrogen for iodine in the iodocarbon, is less than about 0.9 wt. % after the composition is maintained at about 300°F for about two weeks.
• the diene-based compounds are present in the composition in amounts of from about 0.001 % to about 10 % by weight, more preferably from about 0.01 wt. % to about 5 wt. % , and even more preferably from about 0.3 wt. % to about 4 wt.
• the diene-based compounds are selected from the group consisting of allyl ethers, propadiene, butadiene, isoprene, terpenes such as myrcene, terpene derivatives and combinations of any two or more of these.
• each of the compounds identified in the immediately preceding list is intended to include both substituted and unsubstituted forms of the identified compounds.
• the diene-based compounds comprise in major proportion, and even more preferably consist essentially of, propadiene.
• the diene-based compounds comprise in major proportion, and even more preferably consist essentially of, terpenes, terpene derivatives or combinations of these.
• terpene means a compound, which is comprised of at least ten carbon atoms and contains at least one, and preferably at least two isoprene moieties.
• isoprene moiety refers to any portion of a molecule, which includes a radical, which can be formed from substituted or unsubstituted isoprene. In certain preferred embodiments, unsubstituted terpenes are preferred.
• the terpene compound of the present invention comprises at least one head-to-tail condensation product of modified or unmodified isoprene molecules. It is contemplated that any one or more terpene compounds are adaptable for use in accordance with the present invention and that those skilled in the art will be able, in view of the teachings contained herein, to select the number and type of terpene compound(s) for any particular application without undue experimentation.
• the preferred terpenes of the present invention are hydrocarbons having molecular formula (C 5 H 8 ) n in a cyclic or acyclic, saturated or unsaturated, substituted or unsubstituted structure, with n preferably being from 2 to about 6, and even more preferably 2 to 4.
• Terpenes according to the present invention having the formula C ⁇ 0 Hi 6 are sometimes referred to herein as monote ⁇ enes, while te ⁇ enes having the formula C ⁇ 5 H 24 (including substituted forms) are sometimes referred to herein as sesquite ⁇ enes.
• Te ⁇ enes according to the present invention having the formula C 20 H 32 are sometimes referred to herein as dite ⁇ enes, while te ⁇ enes having the formula C 3 oH 8 (including substituted forms) are sometimes referred to as trite ⁇ enes, and so on.
• the te ⁇ ene compound(s) of present compositions comprise, preferably in major proportion, and even more preferably consist essentially of, one or more acyclic te ⁇ ene compounds.
• acyclic te ⁇ enes it is contemplated that such compounds may be within the class of compounds identified as head-to-tail linked isoprenoids or within the class of compounds that are not joined in that manner.
• Acyclic te ⁇ enes which are preferred for use in accordance with certain aspects of the present invention include myrcene (2-methyl-6-methyleneocta-l,7-diene), allo-cimene, beta- ocimene.
• the te ⁇ ene compounds of the present invention may comprise cyclic te ⁇ ene compounds.
• mono-, bi-, tri-, or tetracyclic compounds having varying degrees of unsaturation are contemplated for use in accordance with the present invention.
• te ⁇ ene derivatives in accordance with the present invention include oxygen-containing derivatives of te ⁇ enes such as alcohols, aldehydes or ketones containing hydroxyl groups or carbonyl groups, as well as hydrogenated derivates.
• the diene-based compounds of the present invention comprise the te ⁇ enoid Carnosic acid.
• Carnosic acid is a phenolic dite ⁇ ene that corresponds to the empirical formula C2028O4. It occurs naturally in plants of the Libiatae family. For instance, carnosic acid is a constituent of the species Salvia officinalis (sage) and Rosmarinus officinalis
• any suitable relative amount of the at least one diene-based compound and supplemental optional stabilizer compound(s) may be used.
• the weight ratio of the diene-based compound(s) to other stabilizer compound(s) is in the range of from about 1:99 to about 100:0.
• the weight ratio of diene-based compound(s) to the optional stabilizers is from about 10:1 to about 1 :1, more preferably from about 2: 1 to aboutl : 1 , and even more preferably about 1 :1.
• Preferred te ⁇ ene stabilizers are disclosed in U.S. Provisional Patent
• phenol compound refers generally to any substituted or unsubstituted phenol.
• Suitable phenol compounds include phenols comprising one or more substituted or unsubstituted cyclic, straight-chain, or branched aliphatic substituent group, such as, alkylated monophenols including: 2,6-di-tert-butyl-4-methylphenol; 2,6-di- tert-butyl-4-ethylphenol; 2,4-dimethyl-6-tert-butylphenol; tocopherol; and the like, hydroquinone and alkylated hydroquinones including: t-butyl hydroquinone; other derivatives of hydroquinone; and the like, hydroxylated thiodiphenyl ethers including: 4,4'-thiobis (2-methyl-6-tert-butylphenol); 4,4'-thiobis (3 -methyl-6- tert-butylphenol); 2,2'-thiobis (4-methyl-6-tert-butylphenol); and the like, alkylidene-bisphenols including: 4,4'-m
• alpha. -dimethylamino- p-cresol 4,4-thiobis(6-tert-butyl-m-cresoI); and the like; acylaminophenols; 2,6- di-tert-butyl-4(N,N'-dimethylaminomethylphenol); sulfides including: bis(3- methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis(3,5-di-tert-butyl-4- hydroxybenzyl)sulfide; and the like; as well as, phenolic UV absorb and light stabilizers. Certain preferred phenols include alkylated monophenols such as tocopherol, BHT, hydroquinones, and the like.
• Certain particularly preferred phenols include tocopherol, and the like. Most phenols are commercially available. A single phenol compound and/or mixtures of two or more phenols may be used in the present compositions. Any of a variety of epoxides is suitable for use in the compositions of the present invention. While applicants do not wish to be bound by or to any theory of operation, it is believed that the epoxides of the present invention act as acid scavengers in the CF 3 I compositions and thereby tend to increase the stability of such compositions. A single aromatic epoxide and/or mixtures of two or more aromatic epoxides may be used in the present compositions. Examples of suitable aromatic epoxides include those defined by the formula I below: O / ⁇ R— Ar— O— CH 2 -CH— CH 2 (I)
• R is hydrogen, hydroxyl, alkyl, fluoroalkyl, aryl, fluoroaryl, or O / ⁇ — O— CH 2 -CH— CH, ;
• Ar is a substituted or unsubstituted phenylene or napthylene moiety.
• Certain preferred aromatic epoxides of Formula I include those wherein Ar is phenylene or phenylene substituted with one or more substituents including alkyls, alkenyls, alkynyls, aryls, alkylaryls, halogens, halogenated alkyls, halogenated alkenyls, halogenated alkynyls, halogenated aryls, halogenated arylalkyls, hydroxyls, heteroatom moieties, and the like.
• Examples of suitable compounds of Formula I wherein Ar is an unsubstituted or substituted phenylene include butylphenylglycidyl ether; pentylphenylglycidyl ether; hexylphenylglycidyl ether; heptylphenylglycidyl ether; octylphenylglycidyl ether; nonylphenylglycidyl ether; decylphenylglycidyl ether; glycidyl methyl phenyl ether; 1,4-diglycidyl phenyl diether; 4-methoxyphenyl glycidyl ether; derivatives thereof; and the like.
• Certain other preferred aromatic epoxides of Formula I include those wherein Ar is napthylene or napthylene substituted with one or more substituents including alkyls, alkenyls, alkynyls, aryls, alkylaryls, halogens, halogenated alkyls, halogenated alkenyls, halogenated alkynyls, halogenated aryls, halogenated arylalkyls, hydroxyls, heteroatom moieties, and the like.
• Examples of suitable compounds of Formula I wherein Ar is an unsubstituted or substituted napthylene include naphthyl glycidyl ether; 1,4-diglycidyl naphthyl diether; derivatives thereof; and the like.
• Examples of other suitable aromatic epoxides include bisoxiranes, such as,
• the aromatic epoxides for use in the present invention comprise an epoxide of Formula I wherein Ar is phenylene, substituted phenylene, napthylene, or substituted napthylene. More preferably, the aromatic epoxides comprise an epoxide of Formula I wherein Ar is phenylene or substituted phenylene.
• Examples of certain more preferred aromatic epoxides include butylphenyl glycidyl ether, and the like. Any of a variety of alkyl and/or alkenyl epoxides are suitable for use in the present compositions. Examples of suitable alkyl and alkenyl epoxides include those of Formula II: O / ⁇ Ralk-OCH 2 -CH-CH 2
• R a i k is a substituted or unsubstituted alkyl or alkenyl group.
• Certain preferred epoxides of Formula II comprise alkyl epoxide compounds wherein R a i k is an alkyl group having from about 1 to about 10 carbon atoms, more preferably from about 1 to about 6 carbon atoms, and wherein the alkyl may be unsubstituted or further substituted with one or more substituents including alkyls, alkenyls, alkynyls, aryls, alkylaryls, halogens, halogenated alkyls, halogenated alkenyls, halogenated alkynyls, halogenated aryls, halogenated arylalkyls, hydroxyls, heteroatom moieties, and the like.
• alkyl epoxides of Formula II include n-butyl glycidyl ether, isobutyl glycidyl ether, hexanediol diglycidyl ether, and the like, as well as, fluorinated and perfluorinated alkyl epoxides, and the like.
• Certain more preferred alkyl epoxides comprise hexanediol diglycidyl ether, and the like.
• Certain other preferred epoxides of Formula II comprise alkenyl epoxide compounds wherein R a i is an alkenyl group having from about 1 to about 10 carbon atoms, more preferably from about 1 to about 6 carbon atoms, and wherein the alkenyl may be unsubstituted or further substituted with one or more substituents including alkyls, alkenyls, alkynyls, aryls, alkylaryls, halogens, halogenated alkyls, halogenated alkenyls, halogenated alkynyls, halogenated aryls, halogenated arylalkyls, hydroxyls, heteroatom moieties, and the like.
• alkenyl epoxides of Formula II include allyl glycidyl ether, fluorinated and perfluorinated alkenyl epoxides, and the like. More preferred alkenyl epoxides include allyl glycidyl ether, and the like. A single alkyl epoxide or alkenyl epoxide and/or combinations of two or more thereof may be used in the present compositions.
• the alkyl epoxide for use as an acid scavenger in the present composition comprises polypropylene glycol diglycidyl ether. Examples of polypropylene glycol diglycidyl ether suitable for use in the present invention includes the ether available commercially from
• the epoxide for use in the present invention comprises combinations of two or more aromatic, alkyl, and/or alkenyl substituents. Such epoxides are referred to generally as "multi substituted epoxides.”
• the stabilizer for use in the present invention comprises one or more diene-based compounds, preferably a te ⁇ ene and/or a te ⁇ ene-based compound. In certain embodiments the stabilizer comprises such diene-based compound(s) in combination with at least one phosphite compound, and/or at least one phenol compound and/or at least one aromatic, alkyl, or alkenyl epoxide.
• suitable combinations include stabilizers comprising: tocopherol and allyl glycidyl ether, BHT and glycidyl butyl ether, and the like. Certain particularly preferred combinations include stabilizers comprising: tocopherol and allyl glycidyl ether, and the like.
• the preferred stablizers comprise at least one diene-based compound in combination with at least one phosphite compound. Any suitable relative amount of the at least one phenol compound and the at least one aromatic, alkyl, or alkenyl epoxide may be used in the preferred stabilizers.
• the weight ratio of phenol compound(s) to aromatic or fluorinated alkyl epoxide(s) can be varied from about 1 :99 to about 99: 1.
• the weight ratios of phenol compound(s) to aromatic, alkyl, alkenyl, multisubstituted, or fluorinated alkyl epoxide(s) is from about 30 to about 1, more preferably from about 7 to about 1, more preferably from about 2 to about 1 , and even more preferably about 1:1. Any suitable effective amount of stabilizer may be used in the trifluoroiodomethane compositions of the present invention.
• the term "effective stabilizing amount” refers to an amount of stabilizer of the present invention which, when added to a composition comprising trifluoroiodomethane, results in a stabilized composition wherein the trifluoroiodomethane therein degrades more slowly and/or to a lesser degree relative to the original composition, under the same, or similar, conditions.
• an "effective stabilizing amount" of stabilizer comprises an amount which, when added to a composition comprising trifluoroiodomethane, results in a stabilized composition wherein the trifluoroiodomethane therein degrades more slowly and/or to a lesser degree relative to the original composition under the conditions of at least one, or both, of the standards tests SAE J1662 (issued June
• an "effective stabilizing amount" of stabilizer comprises an amount which, when added to a composition comprising trifluoroiodomethane, results in a composition having a stability that is at least as good as, if not better, than the stability of a comparable composition comprising dichlorodifluoromethane (R-12) in mineral oil, under at least one of the standard tests SAE J1662 (issued June 1993) and/or ASHRAE 97-1983R.
• compositions of the present invention further comprise a lubricant. Any of a variety of conventional and unconventional lubricants may be used in the compositions of the present invention.
• a lub ⁇ cant for any given system is determined partly by the refrigerant/lubricant characteristics and partly by the characteristics of the system in which it is intended to be used
• suitable lubricants include, which are generally those commonly used in refrigeration machinery using or designed to use hydrofluorocarbon (HFC) refrigerants, chloroflurocarbon refrigerants and hydrochlorofluorocarbons refrigerants, include mineral oil, sihcone oil, polyalkyl benzenes (sometimes referred to as PABs), polyol esters (sometimes referred to as POEs), polyalkylene glycols (sometimes referred to as PAGs), polyalkylene glycol esters (sometimes referred to as PAG esters), polyvinyl ethers (sometimes referred to as PVEs), poly(
• the lubricants of this invention are organic compounds which are comprised of carbon, hydrogen and oxygen with a ratio of oxygen to carbon and are included to provide, in combination with the amounts used, effective solubility and/or miscibility with the refrigerant to ensure sufficient return of the lubricant to the compressor.
• This solubility or miscibility preferably exists at least one temperature from about - 30°C and 70°C PAGs and PAG esters are highly preferred in certain embodiments because they are currently in use in particular applications such as original equipment mobile air-conditioning systems. Polyol esters are highly preferred in other certain embodiments because they are currently in use in particular non- mobile applications such as residential, commercial, and industrial air conditioning and refrigeration. Of course, different mixtures of different types of lubricants may be used.
• the present compositions including both the binary CF 3 I/HFC-152a azeotrope-like compositions and the ternary CF 3 I/HFC-152a HFO-1234 azeotrope-like compositions, have utility in a wide range of applications.
• one embodiment of the present invention relates to heat transfer compositions, such as refrigerant compositions, comprising an azeotrope-like composition of the present invention.
• the heat transfer compositions of the present invention are generally adaptable for use in heat transfer applications, that is, as a heating and/or cooling medium.
• compositions of the present invention may include the present azeotrope-like composition in combination with one or more other compounds or combinations of compounds in widely ranging amounts, it is generally preferred that heat transfer compositions of the present invention, including refrigerant compositions, consist essentially of, and in some embodiments consist of the present azeotrope-like compositions.
• the heat transfer compositions of the present invention may be used in any of a wide variety of refrigeration systems including air-conditioning (including both stationary and mobile air conditioning systems), refrigeration, heat-pump, HVAC systems, and the like.
• the compositions of the present invention are used in refrigeration systems originally designed for use with an HFC refrigerant, such as, for example, HFC- 134a, or an HCFC refrigerant, such as, for example, HCFC-22.
• HFC refrigerant such as, for example, HFC- 134a
• HCFC refrigerant such as, for example, HCFC-22.
• the preferred compositions of the present invention tend to exhibit many of the desirable characteristics of HFC- 134a and other HFC refrigerants, including a GWP that is as low, or lower than that of conventional HFC refrigerants and a capacity that is as substantially similar to or substantially matches, and preferably is as high as or higher than such refrigerants.
• the present compositions tend to exhibit relatively low global warming potentials ("GWPs"), preferably less than about 1000, more preferably less than about 500, and even more preferably less than about 150.
• GWPs global warming potentials
• the relatively constant boiling nature of the compositions of the present invention makes them even more desirable than certain conventional HFCs, such as R-404A or combinations of HFC-32, HFC-125 and HFC-134a (the combination HFC-32:HFC-125:HFC134a in approximate 23:25:52 weight ratio is referred to as R-407C), for use as refrigerants in many applications.
• Heat transfer compositions of the present invention are particularly preferred as replacements for HFC-32, HFC-125, HFC-
• the present compositions are also believed to be suitable as replacements for the above noted compositions in other applications, such as aerosols, blowing agents and the like.
• the present compositions are used in heat transfer systems in general, and in refrigeration systems in particular, originally designed for use with a CFC-refrigerant.
• Preferred refrigeration compositions of the present invention may be used in refrigeration systems containing a lubricant used conventionally with CFC-refrigerants, such as mineral oils, polyalkylbenzene, polyalkylene glycols, and the like, or may be used with other lubricants traditionally used with HFC refrigerants.
• a lubricant used conventionally with CFC-refrigerants, such as mineral oils, polyalkylbenzene, polyalkylene glycols, and the like, or may be used with other lubricants traditionally used with HFC refrigerants.
• refrigeration system refers generally to any system or apparatus, or any part or portion of such a system or apparatus, which employs a refrigerant to provide cooling.
• Such refrigeration systems include, for example, air conditioners, electric refrigerators, chillers (including chillers using centrifugal compressors), transport refrigeration systems, commercial refrigeration systems and the like.
• Many existing refrigeration systems are currently adapted for use in connection with existing refrigerants, and the compositions of the present invention are believed to be adaptable for use in many of such systems, either with or without system modification.
• the compositions of the present invention may provide an advantage as a replacement in smaller systems currently based on certain refrigerants, for example those requiring a small refrigerating capacity and thereby dictating a need for relatively small compressor displacement.
• compositions of the present invention particularly compositions comprising a substantial proportion of, and in some embodiments consisting essentially of the present azeotrope-like compositions, as a replacement for existing refrigerants, such as: HFC- 134a; CFC-12; HCFC-22; HFC-152a; combinations of pentfluoroethane (HFC-125), trifluorethane (HFC-
• HFC-134a tetrafluoroethane
• R-404A tetrafluoroethane
• R- 407C combinations of HFC-32, HFC-125 and HFC-134a
• R- 407C combinations of methylene fluoride (HFC-32) and pentfluoroethane
• HFC-125 (the combination HFC-32:HFC-125 in approximate 50:50 weight ratio is referred to as R-410A); the combination of CFC-12 and 1,1-difluorethane (HFC-152a) (the combination CFC-12:HFC-152a in a 73.8:26.2 weight ratio is referred to R-500); and combinations of HFC-125 and HFC-143a (the combination HFC-125:HFC143a in approximate 50:50 weight ratio is referred to as R-507A).
• the present compositions may also be beneficial to use the present compositions in connection with the replacement of refrigerants formed from the combination HFC-32:HFC-125:HFC134a in approximate 20:40:40 weight ratio, which is referred to as R-407A, or in approximate 15: 15:70 weight ratio, which is referred to as R-407D.
• the present compositions are also believed to be suitable as replacements for the above noted compositions in other applications, such as aerosols, blowing agents and the like.
• the refrigerants of the present invention potentially permit the beneficial use of larger displacement compressors, thereby resulting in better energy efficiency than other refrigerants, such as HFC-134a.
• the refrigerant compositions of the present invention provide the possibility of achieving a competitive advantage on an energy basis for refrigerant replacement applications. It is contemplated that the compositions of the present also have advantage (either in original systems or when used as a replacement for refrigerants such as CFC-12, HCFC-22, HFC- 134a, HFC- 152a R-404A, R-410A , R-407C, R-500 and
• HFO-1234ze component of the present compositions may in certain embodiments act as flammability suppressants with respect to other components in the composition.
• HFO1234-ze and CF 3 I may each function to suppress the flammability of such other component.
• components other than HFO1234ze and CF 3 I which have flammability suppressant functionality in the composition will sometimes be referred to herein as a supplemental flammability suppressant.
• CF I component of the present compositions may in certain embodiments act as lubricant, and therefore components other than CF 3 I which have lubrication functionality will sometime be referred to herein as a supplemental lubricants.
• co-refrigerants including for example HFCs, HCFCs and CFCs may be included in the heat transfer compositions of the present invention, including one or more of the following compounds, including any and all isomers thereof: Trichlorofluoromethane (CFC-11) Dichlorodifluoromethane (CFC-12) Difluoromethane (HFC-32) Pentafluoroethane (HFC-125) 1 , 1 ,2,2-tetrafluoroethane (HFC- 134) ,1,2-Tetrafluoroethane (HFC- 134a) , 1 ,2,3,3,3-Heptafluoropropane (HFC-227ea) ,1,3,3,3-hexafluoropropane (HFC-236fa) , 1,3,3-pentafluoropropane (HFC-245fa) ,1,3,3-pentafluorobutane (HFC-365mfc
• the present methods, systems and compositions are thus adaptable for use in connection with automotive air conditioning systems and devices, commercial refrigeration systems and devices, chillers (including systems which utilize centrifugal compressors), residential refrigerator and freezers, general air conditioning systems, heat pumps, and the like.
• Any of a wide range of methods for introducing the present refrigerant compositions to a refrigeration system can be used in the present invention.
• one method comprises attaching a refrigerant container to the low- pressure side of a refrigeration system and turning on the refrigeration system compressor to pull the refrigerant into the system.
• the refrigerant container may be placed on a scale such that the amount of refrigerant composition entering the system can be monitored.
• the present invention provides refrigeration systems comprising a refrigerant of the present invention and methods of producing heating or cooling by sensible heat transfer and/or condensing and/or evaporating a composition of the present invention.
• the methods for cooling comprise condensing a refrigerant composition comprising an azeotrope-like composition of the present invention and thereafter evaporating said refrigerant composition in the vicinity of the fluid or body to be cooled.
• body is intended to refer not only to inanimate objects but also to living tissue, including animal tissue in general and human tissue in particular.
• certain aspects of the present invention involved application of the present composition to human tissue for one or more therapeutic pu ⁇ oses, such as a pain killing technique, as a preparatory anesthetic, or as part of a therapy involving reducing the temperature of the body being treated.
• the application to the body comprises providing the present compositions in liquid form under pressure, preferably in a pressurized container having a one-way discharge valve and/or nozzle, and releasing the liquid from the pressurized container by spraying or otherwise applying the composition to the body. As the liquid evaporates from the surface being sprayed, the surface cools.
• Certain preferred methods for heating a fluid or body article comprise condensing a refrigerant composition comprising an azeotrope-like composition of the present invention in the vicinity of the fluid or body to be heated and thereafter evaporating said refrigerant composition.
• the present invention provides retrofitting methods which comprise replacing the refrigerant in an existing system with a composition of the present invention, without substantial modification of the system.
• the replacement step is a drop-in replacement in the sense that no substantial redesign of the system is required and no major item of equipment needs to be replaced in order to accommodate the refrigerant of the present invention.
• the methods comprise a drop-in replacement in which the capacity of the system is at least about 70%, preferably at least about 85%, and even more preferably at least about 90% of the system capacity prior to replacement.
• the methods comprise a drop-in replacement in which the suction pressure and or the discharge pressure of the system, and even more preferably both, is/are at least about 70%, more preferably at least about 90% and even more preferably at least about 95% of the system capacity prior to replacement.
• the methods comprise a drop-in replacement in which the mass flow of the system is at least about 80%, and even more preferably at least 90% of the system capacity prior to replacement.
• the azeotrope-like compositions of this invention may be used as propellants in sprayable compositions, either alone or in combination with known propellants.
• the propellant composition comprises, more preferably consists essentially of, and, even more preferably, consists of the azeotrope-like compositions of the invention.
• the active ingredient to be sprayed together with inert ingredients, solvents, and other materials may also be present in the sprayable mixture.
• the sprayable composition is an aerosol.
• Suitable active materials to be sprayed include, without limitation, cosmetic materials such as deodorants, perfumes, hair sprays, cleaning solvents and lubricants as well as medicinal materials such as anti-asthma medications.
• medicinal materials is used herein in its broadest sense to include any and all materials which are, or at least are believe to be, effective in connection with therapeutic, diagnostic, pain relief, and similar treatments, and as such would include for example drugs and biologically active substances.
• Yet another embodiment of the present invention relates to a blowing agent comprising one or more azeotrope-like compositions of the invention.
• the blowing agent may include the azeotrope-like compositions of the present invention in widely ranging amounts.
• the blowing agents comprise the present azeotrope-like compositions in amounts at least about 5 % by weight, and even more preferably at least about 15 % by weight, of the blowing agent.
• the blowing agent comprises at least about 50% by weight of the present compositions, and in certain embodiments the blowing agent consists essentially of the present azeotrope-like composition, and in other cases consists of an azeotope-like composition of the present invention
• the blowing agent includes, in addition to the present compositions, one or more of co-blowing agents, fillers, vapor pressure modifiers, flame suppressants, stabilizers and like adjuvants.
• the invention provides foamable compositions.
• the foamable compositions of the present invention generally include one or more components capable of forming foam having a generally cellular structure and a blowing agent in accordance with the present invention.
• the one or more components comprise a thermosetting composition capable of forming foam and/or foamable compositions.
• thermosetting compositions include polyurethane and polyisocyanurate foam compositions, and also phenolic foam compositions.
• one or more of the present compositions are included as or part of a blowing agent in a foamable composition, or as a part of a two or more part foamable composition, which preferably includes one or more of the components capable of reacting and/or foaming under the proper conditions to form a foam or cellular structure.
• the one or more components comprise thermoplastic materials, particularly thermoplastic polymers and/or resins.
• thermoplastic foam components include polyolefins, such as polystyrene (PS), polyethylene (PE), polypropylene (PP) and polyethyleneterepthalate (PET), and foams formed therefrom, preferably low- density foams.
• the thermoplastic foamable composition is an extrudable composition. It will be appreciated by those skilled in the art, especially in view of the disclosure contained herein, that the order and manner in which the blowing agent of the present invention is formed and/or added to the foamable composition does not generally affect the operability of the present invention.
• the various components of the blowing agent, and even the components of the present composition be not be mixed in advance of introduction to the extrusion equipment, or even that the components are not added to the same location in the extrusion equipment.
• blowing agent two or more components of the blowing agent are combined in advance and introduced together into the foamable composition, either directly or as part of premix which is then further added to other parts of the foamable composition.
• the invention also relates to foam, and preferably closed cell foam, prepared from a polymer foam formulation containing a composition of the invention, preferably as part of blowing agent.
• dispersing agents, cell stabilizers, surfactants and other additives may also be inco ⁇ orated into the blowing agent compositions of the present invention.
• Surfactants are optionally but preferably added to serve as cell stabilizers.
• DC-193, B-8404, and L-5340 are, generally, polysiloxane polyoxyalkylene block co-polymers such as those disclosed in U.S. Patent Nos. 2,834,748, 2,917,480, and 2,846,458, each of which is inco ⁇ orated herein by reference.
• blowing agent mixture may include flame retardants or suppressants such as tri(2-chloroethyl)phosphate, tri(2- chloropropyl)phosphate, tri(2,3-dibromopropyl)-phosphate, tri(l ,3- dichloropropyl) phosphate, diammonium phosphate, various halogenated aromatic compounds, antimony oxide, aluminum trihydrate, polyvinyl chloride, and the like. Any of the methods well known in the art, such as those described in
• Example 1 An ebulliometer consisting of vacuum jacketed tube with a condenser on top which is further equipped with a Quartz Thermometer K96S4771 is used. About 15 g HFC- 152a and about 26 g of CF 3 I is charged to the ebulliometer and then HFO-1234 is added in small, measured increments. Temperature depression is observed when HFO-1234 is added to the HFC-152a CF 3 I mixture, indicating a ternary minimum boiling azeotrope is formed. From greater than about 0 to about 14 weight percent HFO-1234, the boiling point of the composition changed by about 1°C or less. The ternary mixtures shown in Table 1 were studied and the boiling point of the compositions changed by about 1°C or less. The compositions exhibit azeotrope and or azeotrope-like properties over this range.
• Example 2 An ebulliometer consisting of vacuum jacketed tube with a condenser on top which is further equipped with a Quartz Thermometer K96S4771 is used. About 36 g CF I and about 26 g of HFO-1234 is charged to the ebulliometer and then HFC-152a is added in small, measured increments. Temperature depression is observed when HFC- 152a is added to the HFO-1234/CF 3 I mixture, indicating a ternary minimum boiling azeotrope is formed. From greater than about 0 to about 29 weight percent HFC- 152a, the boiling point of the composition changed by about 1°C or less. The ternary mixtures shown in Table 2 were studied and the boiling point of the compositions changed by about 1°C or less. The compositions exhibit azeotrope and or azeotrope-like properties over this range.
• Example 3 An ebulliometer consisting of vacuum jacketed tube with a condenser on top which is further equipped with a Quartz Thermometer K96S4771 is used. About 17 g HFC-152a and about 7 g of HFO-1234 is charged to the ebulliometer and then CF I is added in small, measured increments. Temperature depression is observed when CF 3 I is added to the HFC- 152a/HFO- 1234 mixture, indicating a ternary minimum boiling azeotrope is formed. From greater than about 0 to about 29 weight percent CF 3 I, the boiling point of the composition changed by about 3°C or less. The ternary mixtures shown in Table 3 were studied and the boiling point of the compositions changed by about 3°C or less. The compositions exhibit azeotrope and/or azeotrope-like properties over this range.
• Example 4 An ebulliometer consisting of vacuum jacketed tube with a condenser on top which is further equipped with a Quartz Thermometer K96S4771 is used. About 15 g HFC-152a is charged to the ebulliometer and then CF 3 I is added in small, measured increments. Temperature depression is observed when CF 3 I is added to the HFC- 152a, indicating a ternary minimum boiling azeotrope is formed. From greater than about 0 to about 65 weight percent HFO-1234, the boiling point of the composition changed by about 3°C or less. The ternary mixtures shown in Table 4 were studied and the boiling point of the compositions changed by about 3°C or less. The compositions exhibit azeotrope and/or azeotrope-like properties over this range. Table 4

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