WO2009020906A2 - Mixed fluoroalkyl-alkyl surfactants - Google Patents
Mixed fluoroalkyl-alkyl surfactants Download PDFInfo
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- WO2009020906A2 WO2009020906A2 PCT/US2008/072082 US2008072082W WO2009020906A2 WO 2009020906 A2 WO2009020906 A2 WO 2009020906A2 US 2008072082 W US2008072082 W US 2008072082W WO 2009020906 A2 WO2009020906 A2 WO 2009020906A2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
- C07C69/67—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
- C07C69/675—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids of saturated hydroxy-carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/63—Esters of sulfonic acids
- C07C309/64—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms
- C07C309/65—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms of a saturated carbon skeleton
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/04—Saturated ethers
- C07C43/13—Saturated ethers containing hydroxy or O-metal groups
- C07C43/137—Saturated ethers containing hydroxy or O-metal groups containing halogen
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0834—Compounds having one or more O-Si linkage
- C07F7/0838—Compounds with one or more Si-O-Si sequences
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/091—Esters of phosphoric acids with hydroxyalkyl compounds with further substituents on alkyl
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- 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/004—Surface-active compounds containing F
Definitions
- the field of the invention is fluorochemical surfactants, in particular those containing a perfluoroalkyl group and a hydrocarbon group connected by a linking hydrophilic moiety.
- perfluoroalkyl chains For surfactants and surface treatment agents having fluorochemical chains longer perfluoroalkyl chains contain a higher percentage of fluorine at a given concentration and provide better performance. However, fluorinated materials are more expensive. Reduction of the fluorine content with delivery of the same or higher performance is therefore desirable. Reducing the fluorine content would reduce the cost, but it is necessary to maintain product performance.
- WO 2005/113488 described fluoroalkyl/alkyl (twin-tailed) surfactants of the structure Rf-Z 1 -CH[(O) r SO3M] -Z 2 -Rh in which Rf is a fluoroalkyl group that may have an ether bond; Rf 1 is an alkyl group; r is 1 or O; when r is 0, Z 1 and Z 2 respectively are -(CH2) n i -(X 1 )pi - and -(X 2 )qi -, and when r is 1 , Z 1 and Z 2 respectively are -(CH2Y)p2-CH2- and -(CH2Y)q2- > wherein X ⁇ and X 2 are the same or different, and respectively are a divalent linking group; p1 is 0 or 1 ; q1 is 0 or 1 ; n1 is an integer of 1 - 10; Y is O, S, or NR (wherein R is H or a Ci
- Especially desirable would be surfactants with similar performance to current commercial products but having less fluorine present via shorter perfluoroalkyl groups.
- the present invention provides such surfactants.
- the present invention comprises a surfactant of formula 1
- Rf is a linear or branched perfluoroalkyl radical having from 2 to about 20 carbon atoms, optionally interrupted with at least one oxygen;
- R is a Ci to C20 linear, branched or cyclic alkyl, or a CQ to Ci 0 aryl;
- A is -(CH 2 ) m [(CHRi CH 2 O)] S - [(CH 2 ) m (CH) t CHOH(CH 2 ) m ] e -, wherein each m is independently 0 to 3, s is 0 to about 30, t is 0 or 1 , and e is 0 or 1 ,
- R 1 is H or CH 3j
- Q is: -OP(O)(O-M + )(O)-, -O-,
- the present invention further comprises a method of lowering surface tension of a medium comprising contacting the medium with a composition of Formula 1 as described above.
- twin-tailed surfactant is used to describe a surfactant having two hydrophobic groups attached to a connecting hydrophilic group.
- the two hydrophobic groups can be the same, denoted herein as “symmetrical twin-tailed surfactant”.
- twin-tailed surfactant can be dissimilar, denoted herein as “hybrid twin- tailed surfactant”.
- the present invention comprises hybrid twin-tailed surfactants having a lower fluorine content but which retain superior performance effects. It has been found in the present invention that when hydrocarbon (or alkylsilyl) hydrophobes are tethered to a fluorocarbon hydrophobe (oleophobe), surface tension values and critical micelle concentration values are approximately the same as for fully fluohnated surfactants.
- the present invention comprises hybrid fluoroalkyl/alkyl surfactants of Formula 1. (Rf-A)a- Q- ([B]k-R)b Formula 1 wherein a and b are each independently 1 or 2;
- Rf is a linear or branched perfluoroalkyl radical having from 2 to about 20 carbon atoms, optionally interrupted with at least one oxygen;
- R is a C-
- A is -(CH 2 ) m [(CHRi CH 2 O)] S - [(CH 2 ) m (CH) t CHOH(CH 2 ) m ] e -, wherein each m is independently 0 to 3, s is 0 to about 30, t is 0 or 1 , and e is O or 1 ,
- R 1 is H or CH 3j
- Q is: -OP(O)(O-M + )(O)-, -O-,
- V is -C(O)OR 3 and R 3 is H, CH 3 or R f ; R 2 is Ci to C4 alkyl, and
- hybrid twin-tailed surfactants of Formula 1 include Formulae 2 - 9:
- Formula 2 R f -(CH 2 ) n -O-P(O)(OR)(O- M + ), Formula 3: RfCH 2 CH(OH)CH 2 O(CHR 1 CH 2 O) x R, Formula 4: R f (CH 2 ) 2 S(CH 2 ) 2 C(O)O(CHR 1 CH 2 O) x R,
- Formula 8 Rf(CH 2 ) 2 S(O 2 )N(R3)CHR 1 CH 2 O) x R and Formula 9: RfCH 2 CH 2 O(CHR 1 CH 2 O) X C(O)CH(SO 3 -M + )CH 2 C(O)(OCHR 1 CH 2 ) y OR Where R f , n, M + , R, R 1 , and R ⁇ are as defined above for Formula 1 , each x is independently 1 to about 20, and R ⁇ is H or a CI - C4 alkyl group.
- the surfactants of the present invention provide "fluorine efficiency".
- fluorine efficiency means to increase the efficiency or improve the performance of the surfactants so a lower proportion of the expensive fluorine component is required to achieve the same level of performance, or to have better performance using the same level of fluorine.
- the fluorine content of the surfactants of the present invention is about 50% or less compared with the fluorine content of conventional fluohnated surfactants.
- both the fluoroalkyl and alkyl groups have a high degree of freedom of movement, permitting unrestricted orientation at the interface.
- Guo et al. in J. Phys. Chem., 1992, 10068-10074, vide supra, prepared fluoroalkyl/alkyl surfactants in which the fluoroalkyl group, the alkyl group, and the hydrophilic group were all bound to a single carbon atom.
- the tetrahedral structure for the carbon atom forces a separation in the orientation of the fluoroalkyl and alkyl groups (the bond angle is 109.5° for the H-C-H angle in the symmetrical tetrahedral methane molecule).
- the bond angle is 109.5° for the H-C-H angle in the symmetrical tetrahedral methane molecule.
- Most of Guo's examples did not show surface tension results as low as 18 mN/m. It is believed that the approximately 110° forced separation may diminish the effectiveness of the fluoroalkyl/alkyl combination in Guo's examples, compared with the structures of Formulae 2 - 9 above, wherein the hybrid fluoroalkyl and alkyl groups are unrestricted in orientation and can align themselves in the most favorable way.
- the surfactants of the present invention are much easier to prepare, are obtained in higher yield, and provide improved hydrolytic stability.
- surfactants of the present invention can be conveniently prepared by a number of conventional means.
- surfactants of Formula 2 are prepared by treating mixtures of fluoroalkyl and alkyl alcohols with phosphorous pentoxide, with subsequent hydrolysis and alkaline neutralization of the reaction mass. Further details are in U.S. Patent 3,083,224.
- sequential reaction of fluoroalkyl and alkyl alcohols with phosphorous oxychlohde (or, for example pyrophosphoryl chloride), followed by hydrolysis and neutralization can produce the desired materials.
- Hybrid surfactants of the present invention of Formula 3 or 7 can be prepared in a one-step reaction from the Lewis-acid catalyzed condensation of a fluoroalkyl epoxide (such epoxide conveniently prepared as in U.S. Patents 3,145,222 and 4,489,006) with a compound bearing an active hydrogen (e.g., an alcohol, alcohol alkoxylate, or amine).
- Catalysts include, but are not limited to, lanthanum group triflates or boron trifluoride etherate.
- surfactants of this type with fluoroalkyl acid derivatives (prepared, for example, as in U.S. Patents 4,7848,09 or 3,172,910) and hydrocarbon alcohols or with hydrocarbon acid derivatives and fluoroalkyl-substituted alcohols.
- Hybrid surfactants of Formula 5 are readily prepared from the condensation reaction of a fluoroalkyl sulfonyl halide (prepared as in FR Patent 1600425) with a hydrocarbon alcohol or alcohol alkoxylate.
- the present invention further comprises a method of lowering surface tension of a medium comprising contacting the medium with a composition of Formula 1 as described above.
- a medium is a liquid.
- Preferred are aqueous, hydrocarbon, and halocarbon systems.
- suitable medium examples include, for example, a coating composition, latex, polymer, floor finish, ink, emulsifying agent, foaming agent, release agent, repellency agent, flow modifier, film evaporation inhibitor, wetting agent, penetrating agent, cleaner, grinding agent, electroplating agent, corrosion inhibitor, etchant solution, soldering agent, dispersion aid, microbial agent, pulping aid, rinsing aid, polishing agent, personal care composition, drying agent, antistatic agent, floor polish, or bonding agent.
- a coating composition latex, polymer, floor finish, ink, emulsifying agent, foaming agent, release agent, repellency agent, flow modifier, film evaporation inhibitor, wetting agent, penetrating agent, cleaner, grinding agent, electroplating agent, corrosion inhibitor, etchant solution, soldering agent, dispersion aid, microbial agent, pulping aid, rinsing aid, polishing agent, personal care composition, drying agent, antistatic agent, floor polish, or bond
- a low concentration of about 0.1 % by weight of surfactant is sufficient to lower surface tension to less than about 24 mN/m, preferably less than about 22 mN/m, and most preferably less than about 20 mN/m.
- concentrations of 0.01 % by weight of the surfactant are effective to achieve a surface tension of less than about 22 mN/m.
- the present invention further comprises a method of providing wetting and leveling to a coated substrate comprising adding to the coating base prior to deposition on the substrate, a composition comprising one or more compounds of formula (I) as described above.
- Suitable coating compositions include a composition, typically a liquid formulation, of an alkyd coating, Type I urethane coating, unsaturated polyester coating, or water- dispersed coating, and are described in Outlines of Paint Technology (Halstead Press, New York, NY, Third edition, 1990) and Surface Coatings Vol. I, Raw Materials and Their Usage (Chapman and Hall, New York, NY, Second Edition, 1984), herein incorporated by reference.
- Such coating bases are applied to a substrate for the purpose of creating a lasting film on the substrate surface.
- These are conventional paints, stains, floor polishes, and similar coating compositions.
- water-dispersed coatings as used herein is meant coatings intended for the decoration or protection of a substrate composed of water as an essential dispersing component such as an emulsion, latex, or suspension of a film-forming material dispersed in an aqueous phase.
- “Water-dispersed coating” is a general classification that describes a number of formulations and includes members of the above described classifications as various classifications. Water-dispersed coatings in general contain other common coating ingredients.
- Water-dispersed coatings are exemplified by, but not limited to, pigmented coatings such as latex paints, unpigmented coatings such as wood sealers, stains, finishes, polishes, coatings for masonry and cement, and water-based asphalt emulsions.
- a water dispersed coating optionally contains surfactants, protective colloids and thickeners, pigments and extender pigments, preservatives, fungicides, freeze-thaw stabilizers, antifoam agents, agents to control pH, coalescing aids, and other ingredients.
- the film forming material is a latex polymer of acrylate acrylic, vinyl-acrylic, vinyl, or a mixture thereof.
- Such water-dispersed coating compositions are described by C. R.
- dried coating as used herein is meant the final decorative and/or protective film obtained after the coating composition has dried, set or cured.
- a final film can be achieved by, for non- limiting example, curing, coalescing, polymerizing, interpenetrating, radiation curing, UV curing or evaporation.
- Final films can also be applied in a dry and final state as in dry coating.
- Floor waxes, polishes, or finishes are generally water based or solvent based polymer emulsions.
- the surfactants of Formula I of the present invention are suitable for use in such floor finishes.
- Commercially available floor finish compositions typically are aqueous emulsion-based polymer compositions comprising one or more organic solvents, plasticizers, coating aids, anti-foaming agents, surfactants, polymer emulsions, metal complexing agents, and waxes.
- the particle size range and solids content of the polymer are usually controlled to control the product viscosity, film hardness and resistance to deterioration.
- Polymers containing polar groups function to enhance solubility and may also act as wetting or leveling agents providing good optical properties such a high gloss and distinctness of reflected image.
- Preferred polymers for use in floor finishes include acrylic polymers, polymers derived from cyclic ethers, and polymers derived from vinyl substituted aromatics.
- Acrylic polymers include various poly(alkyl acrylates), poly(alkyl methacrylates), hydroxyl substituted poly(alkyl acrylates) and poly(alkyl methacrylates).
- Commercially available acrylic copolymers used in floor finishes include, for example, methyl methacrylate/butyl acrylate/methacrylic acid (MMA/BA/MAA) copolymers; methyl methacrylate/butyl acryl ate/acrylic acid (MMA/BA/AA) copolymers, and the like.
- commercially available styrene-acrylic copolymers include styrene/methyl methacrylate/butyl acrylate/methacrylic acid
- S/MMA/BA/MMA styrene/methyl methacrylate/butyl acrylate/acrylic acid
- S/MMA/BA/AA styrene/methyl methacrylate/butyl acrylate/acrylic acid
- Polymers derived from cyclic ethers usually contain 2 to 5 carbon atoms in the ring with optional alkyl groups substituted thereon. Examples include various oxiranes, oxetanes, tetrahydrofurans, tetrahydropyrans, dioxanes, trioxanes, and caprolactone.
- Polymers derived from vinyl substituted aromatics include for example those made from styrenes, pyridines, conjugated dienes, and copolymers thereof.
- Polyesters, polyamides, polyurethanes and polysiloxanes are also used in floor finishes.
- the waxes or mixtures of waxes that are used in floor finishes include waxes of a vegetable, animal, synthetic, and/or mineral origin.
- Representative waxes include, for example, carnuba, candelilla, lanolin, stearin, beeswax, oxidized polyethylene wax, polyethylene emulsions, polypropylene, copolymers of ethylene and acrylic esters, hydrogenerated coconut oil or soybean oil, and the mineral waxes such as paraffin or ceresin.
- the waxes typically range from 0 to about 15 weight percent and preferably from about 2 to about 10 weight percent based on the weight of the finish composition.
- compositions of the present invention of Formula (I) as defined above are effectively introduced to the composition by thoroughly stirring it in at room or ambient temperature. More elaborate mixing can be employed such as using a mechanical shaker or providing heat or other methods.
- the compositions of the invention When used as an additive to coating bases or floor finishes, the compositions of the invention generally are added at about 0.001 weight % to about 5 weight % by dry weight of the composition of the invention in the wet composition. Preferably about from about 0.01 weight % to about 1 weight %, and more preferably from about 0.1 weight % to about 0.5 weight % is used.
- the compounds of Formula I are useful in many additional applications due to their surfactant properties.
- the improved surfactant properties also provide improved foaming characteristics, reduced interfacial tension with hydrocarbon or halocarbon solvents, improved leveling of coatings, improved dynamic surface tension (the reduction of surface tension as a function of time).
- the compounds represented by Formula I of the present invention are suitable for the use in fire fighting compositions, for example as a wetting agent, emulsifying agent and/or dispersant. They are also useful as a component in aqueous film forming extinguishing agents, and as an additive to dry chemical extinguishing agents in aerosol-type extinguishers, and as a wetting agent for sprinkler water.
- the compounds of Formula I of the present invention are suitable for the use in agricultural compositions.
- Formula I compounds include as a wetting agent, emulsifying agent and/or dispersion agent for herbicides, fungicides, weed killers, parasiticides, insecticides, germicides, bactericides, nematocides, microbiocides, defoliants, fertilizers and hormone growth regulators.
- Formula I compounds are also suitable as a wetting agent for foliage, for live stock dips and to wet live stock skins; as an ingredient in sanitizing, discoloring and cleaning compositions; and in insect repellent compositions.
- the compounds of Formula 1 are also useful as a wetting agent, emulsifying agent and/or dispersion agent for the manufacture of paper and plywood veneer.
- the compounds of Formula I are also suitable for use as grease/oil repellents for paper, wood, leather, skins, metals, textiles, stone, and tiles, and as penetrant for preservative impregnation.
- the compounds represented by Formula I of the present invention are also suitable for the use as a wetting agent, emulsifying agent and/or dispersion agent for polymerization reactions, particularly polymerization of fluoromonomers. These compounds are also suitable as a latex stabilizer; as an additive for foam applications to control spreading, crawling and edge buildup; as foaming agents, as mold release agents or as demolding agents; as an internal antistatic agent and antiblocking agent for polyolefins; as a flow modifier for extruding hot melts, spreading, uniformity, anticratering; and as a retarder for plasticizer migration or evaporation in the plastics and rubber industry.
- the compounds of Formula I of the present invention are further suitable for the use in the petroleum industry as a wetting agent for oil well treatments, drilling mud; as a film evaporation inhibitor for gasoline, jet fuel, solvents, and hydrocarbons; as a lubricant or cutting oil improver to improve penetration times; as an oil spill collecting agent; and as additive to improve tertiary oil well recovery.
- the compounds of Formula I of the present invention are further suitable for the use in textile and leather industries as a wetting agent, antifoaming agent, penetrating agent or emulsifying agent; or as a lubricant for textiles, nonwoven fabrics and leather treatment; for fiber finishes for spreading, and uniformity; as a wetting agent for dyeing; as a binder in nonwoven fabrics; and as a penetration additive for bleaches.
- the compounds of Formula I of the present invention are further suitable for the use in the mining and metal working industries, in the pharmaceutical industry, automotives, building maintenance and cleaning, in household, cosmetic and personal products, and in photography and
- the compounds of Formula 1 are useful as surfactants and leveling agents in aqueous solutions and emulsions.
- compositions of the present invention have enhanced fluorine efficiency compared to current commercial products.
- inventive compositions provide the advantages of altering surface properties using less fluorine to achieve the same level of performance, or provide better performance using the same level of fluorine, as prior art compositions.
- Formulation N-29-1 available from Rohm & Haas, Philadelphia, PA] and applied to half of a thoroughly cleaned 12 inch X 12 inch (30.36 cm X 30.36 cm) vinyl tile (available from Interfuse Vinyl Tiles by Estrie, Sherbrooke, QC Canada).
- the tiles are thoroughly cleaned by wetting the tiles, adding a powdered oxygen bleach cleanser and scrubbing using a green SCOTCH-BRITE scouring pad, available from 3M Company, St. Paul MN). This scrubbing procedure was used to remove the pre-existing coating on the tiles.
- the tiles initially have a uniform shiny finish; a uniform dull finish indicates coating removal.
- the tiles are then air-dried overnight.
- a 1 wt % solution of the surfactant to be tested was prepared by dilution in deionized water. Following the resin manufacturer protocols, a 100 g portion of the RHOPLEX 3829 formulation was prepared, followed by addition of 0.75 g of the 1 wt % surfactant solution, to provide a test floor polish.
- the test floor polish was applied to the tile by placing 3 mL portion of the test polish in the center of the tile, and spreading from top to bottom using a cheesecloth applicator, and finally placing a large "X" across the tile, using the applicator. The "X" subsequently provides visual evidence of leveling at the rating step.
- the applicator was prepared from a two-layer 18 x 36 inch (46 x 91 cm) sheet of cheesecloth (from VWR, West Chester PA), folded twice into an eight-layer pad. One corner of the pad was then used as the applicator.
- the tile was allowed to dry for 30 min. and a total of 5 coats (Coating #s 1 - 5) were applied and dried, with the X test performed after each coating had been dried. After each coat, the tile was rated on a 1 to 5 scale (1 being the worst, 5 the best) on the surfactant's ability to promote wetting and leveling of the polish on the tile surface. The rating is determined using the Tile Rating Scale below, based on comparison of a tile treated with the floor polish that contains no added surfactant
- Test Method 2 Surface Tension Measurement. Surface tension was measured according to the American Society for Testing and Materials ASTM # D1331 -56, using the Wilhelmy plate method on a KRUSS K11 tensiometer [KRUSS USA, Matthews, NC]. Results are in mN/m (N-m x 10 ⁇ 7 ) (dynes/cm). The tensiometer was used according to the manufacturer's recommendations. Test Method 3 - lnterfacial Tension by Drop Shape.
- lnterfacial tensions were measured at the phase boundary with cyclohexane using the pendant drop method (KRUSS DSA-100 pendant drop method, DSA1 drop shape analysis software SW3203) on a KRUSS DSA-100 surface analysis system (available from KRUSS USA, Matthews, NC).
- the critical micelle concentration was measured by plotting the surface tension of the surfactant/water mixture versus the concentration of the surfactant and determining the point at which the surfactant concentration no longer has any appreciable influence on the surface tension.
- test method described herein is a modification of ASTM D4946 - 89, Standard Test Method for Blocking Resistance of Architectural Paints, which is hereby specifically incorporated by reference.
- the face-to-face blocking resistance of paints to be tested was evaluated in this test.
- Blocking for the purpose of this test, is defined as the undesirable sticking together of two painted surfaces when pressed together or placed in contact with each other for an extended period of time.
- the paint to be tested was cast on a polyester test panel using an applicator blade. All painted panels were protected from surface contamination, such as grease, oil, fingerprints, dust, and the like. Typically, results were sought at 24 hours after casting the paint. After the panels had been conditioned in a conditioned room with controlled temperature and humidity as specified in the ASTM test method for the desired period of time, six squares (3.8 cm x 3.8 cm) were cut out from the painted test panel. The cut sections (three pairs) were placed with the paint surfaces face-to-face for each of the paints to be tested. The face- to-face specimens were placed in a 50 0 C oven on a marble tray. A no.
- Blocking Resistance Numerical Ratings The degree of seal was estimated from the appearance of the specimens and the fraction of the paint surfaces that adhere. Paint tearing away from the test panel backing was an indication of seal. A higher number indicated better resistance to blocking. Blocking Resistance Numerical Ratings
- telomer B alcohol A mixture of Ce - Ci 4 perfluoroalkylethanols [F(CF2CF2)n(CH2CH2)OH] where n is 3 to 6, is available from E. I. du Pont de Nemours and Company, Wilmington DE. Alcohols of this composition are referred to herein as "telomer B alcohol”.
- TERGITOL 15-S-series (15-S-n, R(OCH2CH2) n OH), is commercially available from Dow Chemical, Midland Ml.
- Comparative Example A was prepared as in Example 1 using 100 mole% telomer B alcohol and no 1-octanol. Surface tension measurements by Test Method 2 for Comparative Example A in deionized water at various weight % as shown in Table 1.
- Table 1 shows that all the Examples (mixed perfluoroalkylethyl/octyl phosphate esters) showed a lower surface tension compared to the Comparative Example A (the perfluoroalkylethyl ester without octyl ester groups).
- Example 2 with 50:50 mole ratio of the perfluoroalkylethyl/octyl phosphate ester has the lowest surface tension.
- the number associated with "n" in the TERGITOL 15-S-sehes product name and structure is the average number of ethylene oxide chains on the secondary alcohol ethoxylate.
- Example 6 The synthesis of hybrid ethoxylates of formulae 3 were formed by a
- the condensation product was a clear, orange liquid with a small amount of sediment at the bottom (CeF 1 3CH 2 CHOHCH 2 (OCH 2 CH 2 )I 2 ⁇ Ci3H 2 7, 77g, yield 100%).
- GC analysis showed that the hybrid ethoxylate (retention time 7.101 min.) was 78.0% pure.
- Comparative Example B was a fluoroethoxylate (RfCH 2 CH 2 (CH 2 CH 2 O) n H, n is about 7), which is prepared by the reaction of telomer B alcohol with ethylene oxide.
- a glass flask was equipped with an agitator and dry ice condenser, a subsurface gas inlet tube, and in inert nitrogen atmosphere at ambient pressure.
- Fluorinated alcohol (244 g, approximately 0.55 mole) of F(CF 2 )[TiCH 2 CH 2 OH, having the following approximate distribution: 4% of m is 2 to 4, 35% of m is 6, 30% of m is 8, 17% of m is 10, 8% of m is 12, and 6% of m is 14 or greater, was charged to the flask and then dehydrated by heating to 8OC under a sparge of inert gas. Sodium borohydhde (1.02g, 0.027 mole) and iodine (1.8 g, 0.007 mole) were added, and the mixture stirred and heated to 140-145C.
- Table 2 shows that Examples 5 and 6, with both a perfluoroalkyl group and a hydrocarbon group present, had similar critical micelle concentrations compared to the Comparative Example B (the perfluoroalkylethyl ethoxylate). That is, the surfactants of the present invention are effective at reducing surface tension at very low concentrations, even when compared to fully-fluohnated surfactants.
- Example 6 The hybrid surfactants of Example 6 were used to reduce interfacial tension and dynamic interfacial tension (i.e., interfacial tension as a function of time) between water and hydrocarbon solvents (e.g., cyclohexane). This phenomenon is useful in improving coatings, creating emulsions, and in fire-fighting applications.
- Interfacial Tension Measurements (mN/m) of Example 6 and Comparative Example B were carried out at 0.01 % concentration in deionized water. Interfacial tensions were measured at the phase boundary with cyclohexane using Test Method 3. Results are in Table 3
- Example 6 consistently had a lower interfacial tension with cyclohexane than the Comparative Example B. Interfacial tension at phase boundaries between water and halogenated liquids was reduced using Example 6. This is particularly useful in creating emulsions of halogenated materials in aqueous media for the purpose of conducting polymerization, e.g. of tetrafluoroethylene.
- Interfacial Tension (mN/m) was measured of hybrid twin-tail surfactant Example 6 at 0.01 % concentration in deionized water at the phase boundary with CF3CHFCHFCF2CF3, available from E. I. du Pont de Nemours and Company, Wilmington DE ). Interfacial tension was measured according to Test Method 3. The results are in Table 4.
- the data in Table 5 shows that a fluorocarbon/hydrocarbon hybrid ethoxylate of Example 6 had lower foaming properties than the fully fluorinated Comparative Example B, making it useful, for example, in coatings applications where foam is an undesired attribute.
- the fluorocarbon/hydrocarbon hybrid ethoxylate of Example 5 had greater foaming properties than the fully fluorinated Comparative Example B, making it useful for example in creating foam "blankets" in fire-fighting applications.
- Comparative Example B and Example 6 were added to RHOPLEX 3829, formulation N-29-1 , floor polish, available from Rohm & Haas, Philadelphia, PA, in an amount of 1.0% active ingredient and tested for wetting and leveling according to Test Method 1. The results are in Table 6. Table 6
- Example 6 containing 50% of the fluorine content of Comparative Example B, was superior in leveling compared to the blank and had similar leveling performance compared to the fully fluorinated Comparative Example B.
- the surfactants of the present invention containing fluoroalkyl and hydrocarbon groups unexpectedly show excellent leveling at very low concentrations, even when compared to fully-fluorinated surfactants.
- Boiling began at about 111 °-112°C. Boiling temperature gradually increased to 115° - 116°C over the next 2 h, and small amount of water began to collect in the Dean-Stark traps. After about 3 h, about 1 ml_ water had been captured in each. The temperature was then reduced below the boiling point and 0.3 g p-toluenesulfonic acid monohydrate was added to each reactor. Heating was resumed and the contents were refluxed overnight.
- Example C had about 1.4 ml_ of water
- Example 7 had about 1.9 ml_ of water
- each had about 20 ml_ of toluene.
- Reflux was continued for another 8 h, during which time the traps were drained 4 more times.
- the toluene was distilled off, giving about 65 ml_ of additional toluene from each vessel. The vessels were then allowed to cool overnight.
- Example 7 had equivalent performance compared to a Comparative Example C, prepared with twice as much of the fluorinated ethoxylate. Thus Example 7 demonstrated comparable performance at 50% of the fluorine content, providing an increase in fluorine efficiency.
- Example 8 The surface tension of Example 8 and Comparative Example B were measured using Test Method 2. The results are in Table 9. Table 9 - Surface Tension versus Concentration
- Example 8 containing 50% less fluorine than Comparative Example B, has performance comparable to Comparative Example B at concentrations of about 0.10% or higher.
- the final product was dried at 12O 0 C and 150 mmHg (20 kPa) inside a vacuum oven.
- the product was a compound of Formula 1 wherein R f is C 6 H 13 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O-M + )(O), M is Na, k is 0, R is C 8 H 17 , and b is 1.
- Surface tension was measured using Test Method 2 and the results are in Table 11.
- Example 9 The process of Example 9 was employed using different hydrocarbon alcohols in the amounts as listed in Table 10.
- the products were compounds of Formula 1 wherein R f is CeHi 3 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O-M + )(O), M is Na, k is 0, b is 1 , and for Example 10 R is CsHi 7 , for Example 11 R is C 4 H 9 , for Example 12 R isC 5 Hn, for Example 13 R is C 7 Hi 5 , for Example 14 R isC 9 Hi 9 , for Example 15 R is Ci 0 H 2 i and for Example 16 R is (CH 2 ) 2 C 6 Hi 3 . Surface tension was measured using Test Method 2 and the results are in Table 11.
- Example 9 The process of Example 9 was employed with the following variations.
- Example 17 the fluohnated alcohol and 1-octanol were mixed together and added in a single step.
- Example 18 the 1 -octanol was added first and the fluohnated alcohol in a second step.
- Example 19 and 20 differing amounts of the fluorinated alcohols and i-octanol as shown in Table 10 were employed.
- the products obtained were the same as in Example 9. Surface tension was measured using Test Method 2 and the results are in Table 11.
- Example 9 The process of Example 9 was employed except that twice the amount of fluorinated alcohol was reacted and no hydrocarbon alcohol was used.
- the product obtained was similar to Formula 1 but contained a second R f group in place of R, so that each Rf is C 6 Hi 3 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O-M + )(O), M is Na, k is 0, and b is 1.
- Example 9 The process of Example 9 was employed except that twice the amount of the hydrocarbon alcohol, 1 -octanol, was reacted and no fluorinated alcohol was used.
- the product obtained was similar to Formula 1 but contained a second R group in place of Rf, so that each R is C 8 H 17 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O-M + )(O), M is Na, k is 0, and b is 1.
- Table 11 shows the surface tension results for Examples 9-20 and Comparative Examples D and E. The average results and standard deviations were obtained from the individual testing of three different solutions of surfactants.
- the fluorine content of each surfactant as specified in Table 11 is for the dried surfactants and was determined by Test Method 6.
- all the Examples 9-20 demonstrated similar or superior performance to the Comparative Example D while having lower fluorine content at concentrations of 0.5, 0.1 and 0.05 weight % in solution.
- Several of the Examples demonstrated superior performance at a concentration of 0.01 % by weight in solution.
- the performance of Examples 9, 16, 17, 18 and 19 as each required only 0.05% by weight in solution to reduce the surface tension of water below 20 dynes/cm. (mN/m).
- Example 21 The process of Example 9 was employed except the fluorinated alcohol was C 4 H 9 CH 2 CH 2 OH in the amount shown in Table 12, and the hydrocarbon alcohol was as indicated in the amounts shown in Table 12.
- the products were compounds of Formula 1 wherein R f is C 4 H 9 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O-M + )(O), M is Na, k is 0, b is 1 , and for Example 21 R is C 4 H 9 , for Example 22 R is C 5 Hn, for Example 23 R is CeHi 3 , for Example 24 R is C 7 H 15 , for Example 25 R isC 8 H 17 , for Example 26 R is C 9 H 19 and for Example 27 R is C 1 OH 21 . Surface tension was measured using Test Method 2 and the results are in Table 13.
- Example 9 The process of Example 9 was employed except that twice the amount of fluorinated alcohol was reacted and no hydrocarbon alcohol was used.
- the product obtained was similar to Formula 1 but contained a second Rf group in place of R, so that each Rf is C 4 H 9 , A is CH 2 CH 2 (s and e are each 0 and m is 2), Q is OP(O)(O " M + )(O), M is Na, k is 0, and b is 1.
- Table 13 shows the surface tension results for the Examples 21-27 hybrid phosphates.
- the hybrid surfactants were compared against the non-hybrid Comparative Example F.
- the fluorine content of each surfactant was calculated from the amount of reagents used for the synthesis as specified on Table 13.
- Examples 21 -27 demonstrated similar performance to the Comparative Example F while having lower fluorine content.
- Examples 25-27 generally demonstrated superior performance.
- Examples 21 -24, which each contained a shorter chain hydrocarbon group R, were less effective than Examples 25-27, which each contained a longer chain hydrocarbon group R, indicating that as the fluorine is decreased, a longer hydrocarbon tail is desirable.
- the most significant improvement in fluorine efficiency was observed for Examples 26 and 27.
- These two surfactants were capable of reducing the surface tension of water below 20 dynes/cm (mN/m) while using much less fluorine than Comparative Example F.
- Example 15 A 5% by weight aqueous dispersion of Examples 15, 18, and Comparative Example D were prepared. Each of these was added to 100 g of VISTA 6400 paint in the amount listed in Table 14 to provide 70 ppm (micrograms/g) of fluorine. Each of these were also added to 100 g of VISTA 6400 paint in the amount of 0.28 g to provide a fluorine content as listed in Table 15. The paint was applied to polyester test panels and tested for blocking in accordance with Test Method 7. The resulting data is shown in Tables 14 and 15. Table 14 - Blocking scores at same fluorine content
- Table 14 compares the blocking performance of Comparative Example D against Examples 15 and 18 at same fluorine content. The test was carried out following Test Method 7 in which the test samples are rated from 0 to 10. Higher blocking scores represent better blocking performance. Both Examples 15 and 18 demonstrated superior performance than Comparative Example D. These two examples also enhance fluorine efficiency as demonstrated by their higher blocking scores at the same level of fluorine concentration.
- Table 15 compares the blocking performance of Comparative Example D against Examples 15 and 18 at same weight content. The test was carried out following Test Method 7 in which the test samples are rated from 0 to 10. Higher blocking scores represent better blocking performance. Both Examples 15 and 18 demonstrated superior performances at significantly lower fluorine content than Comparative Example D. These results are consistent with enhanced fluorine efficiency provided by the hybrid nature of the Examples.
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Abstract
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08797094A EP2173758A2 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
CA2693788A CA2693788A1 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
AU2008283998A AU2008283998B2 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
CN200880102130.9A CN101835785B (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
KR1020107005055A KR101506753B1 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
JP2010520240A JP5697980B2 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
HK11102421.2A HK1148289A1 (en) | 2007-08-06 | 2011-03-10 | Mixed fluoroalkyl alkyl surfactants |
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US11/890,395 US7728163B2 (en) | 2007-08-06 | 2007-08-06 | Mixed fluoroalkyl-alkyl surfactants |
US11/890,395 | 2007-08-06 |
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PCT/US2008/072082 WO2009020906A2 (en) | 2007-08-06 | 2008-08-04 | Mixed fluoroalkyl-alkyl surfactants |
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US (2) | US7728163B2 (en) |
EP (1) | EP2173758A2 (en) |
JP (3) | JP5697980B2 (en) |
KR (1) | KR101506753B1 (en) |
CN (2) | CN104860985B (en) |
AU (3) | AU2008283998B2 (en) |
CA (1) | CA2693788A1 (en) |
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WO2010107985A1 (en) * | 2009-03-20 | 2010-09-23 | E. I. Du Pont De Nemours And Company | Phosphate surfactants |
WO2011030725A1 (en) * | 2009-09-08 | 2011-03-17 | ダイキン工業株式会社 | Novel nonionic surfactant and fog-preventive agent |
WO2011071510A1 (en) | 2009-12-11 | 2011-06-16 | Rhodia Operations | Methods and systems for improving open time and drying time of latex binders and aqueous coatings |
CN102482206A (en) * | 2009-07-10 | 2012-05-30 | 纳幕尔杜邦公司 | Polyfluorosulfonamido amides useful as intermediates in the synthesis of polyfluorosulfonamido amines |
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JP5621775B2 (en) * | 2009-09-08 | 2014-11-12 | ダイキン工業株式会社 | New nonionic surfactant and anti-fogging agent |
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EP2510064A1 (en) * | 2009-12-11 | 2012-10-17 | Rhodia Operations | Methods and systems for improving open time and drying time of latex binders and aqueous coatings |
EP2510064A4 (en) * | 2009-12-11 | 2013-05-01 | Rhodia Operations | Methods and systems for improving open time and drying time of latex binders and aqueous coatings |
WO2011071510A1 (en) | 2009-12-11 | 2011-06-16 | Rhodia Operations | Methods and systems for improving open time and drying time of latex binders and aqueous coatings |
CN109880173A (en) * | 2018-11-30 | 2019-06-14 | 杭州捷尔思阻燃化工有限公司 | The surface modifying method of phosphorus-nitrogen type halogen-free expanding fire retardant and its application |
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AU2014224091B2 (en) | 2016-02-04 |
WO2009020906A3 (en) | 2009-05-28 |
KR101506753B1 (en) | 2015-04-23 |
AU2014224090A1 (en) | 2014-10-02 |
AU2008283998B2 (en) | 2014-07-03 |
US20090042996A1 (en) | 2009-02-12 |
AU2014224091A1 (en) | 2014-10-02 |
HK1213902A1 (en) | 2016-07-15 |
JP2014167130A (en) | 2014-09-11 |
CN101835785B (en) | 2015-05-06 |
US7728163B2 (en) | 2010-06-01 |
AU2008283998A1 (en) | 2009-02-12 |
US8242301B2 (en) | 2012-08-14 |
CA2693788A1 (en) | 2009-02-12 |
HK1148289A1 (en) | 2011-09-02 |
CN104860985B (en) | 2017-08-04 |
EP2173758A2 (en) | 2010-04-14 |
JP2014169453A (en) | 2014-09-18 |
CN101835785A (en) | 2010-09-15 |
JP2010535791A (en) | 2010-11-25 |
US20100267843A1 (en) | 2010-10-21 |
AU2014224090B2 (en) | 2016-02-04 |
JP5976724B2 (en) | 2016-08-24 |
JP5697980B2 (en) | 2015-04-08 |
KR20100057027A (en) | 2010-05-28 |
CN104860985A (en) | 2015-08-26 |
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