Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2764602 A
Publication typeGrant
Publication dateSep 25, 1956
Filing dateApr 21, 1954
Priority dateApr 21, 1954
Publication numberUS 2764602 A, US 2764602A, US-A-2764602, US2764602 A, US2764602A
InventorsArthur H Ahlbrecht
Original AssigneeMinnesota Mining & Mfg
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Quaternary ammonium alkylperfluoroamides
US 2764602 A
Abstract  available in
Images(5)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Unite QUATERNARY AMlVIONIUlVI ALKYL- PERFLUOROAMIDES No Drawing. Application April 21, 1954,

' Serial No. 424,788

4 Claims. (Cl. 260-4045) This invention relates to my discovery of a new and useful class of reactive fluorocarbon compounds. These compound-s have utility as cationic surface active'agents, as surface treating and coating agents, as starting compounds for making'derivatives, and for other purposes.

These novel compounds are perfluoralkyl quaternary nitrogen compounds having in the molecule an intermediate amidopolymethylene linkage and uniquely characterized by having a terminal carbonyl-bonded perfluoroalkyl chain which provides a nonpolar saturated fluorocarbon tail that is both hydrophobic and oleophobic. This fluorocarbon tail is repellent not only to water but to oils and hydrocarbons and imparts unique surface active and surface treatment properties not possessed by corresponding compounds having a carbonylbonded hydrocarbon tail.

The invention provides surface active agents which have extraordinary activity in reducing by a large amount the surface tension of oils and waxes even when present in very small concentrations, notwithstanding that they are water-soluble as well as oil-soluble and are also highly eflective for reducing the surface tension of Water and aqueous solutions. This combination of properties is highly unusual. The corresponding non-fiuorinated compounds of conventional organic chemistry do not have significant surface tension reduction properties when dissolved in oils and waxes, although they may have a high degree of activity in water and aqueous solutions when the hydrocarbon chains are of suflicient length. So far as I am aware, there are no non-fluorinated surface active agents capable of markedly reducing the surface tension both of Water and oils at low concentrations; nor is this a general characteristic of fluorinated surface active agents.

My perfluoralkyl-amidopolymethylene quaternary nitrogen compounds constitute a class of related compounds that can be represented by the generic formula:

[CnFz1t+1CONH-( CH2) m--NQ] +A- and by the equivalent formula for normal compounds:

trostatically bonded to the quaternary nitrogen atom.

NQ is a terminal oleophilic organic cationogenic group united to the polymethylene linkage and contains a quaternary nitrogen atom (N) covalently bonded to hydrogenated carbon atoms and electrostatically bonded to atent ice quaternary nitrogen atom by means of carbon-nitrogen bonds and is linked through this nitrogen atom to the polymethylene linkage. It is this cationogenic group that causes the organic chain to be a cation having a positive charge at the quaternary nitrogen position.

As is clearly evident from the above structural formulas, the complete molecule consists of an anion (negatively charged) electrostatically united to a long-chain cation (positively charged owing to the positive charge of the quaternary nitrogen atom). When dissolved in water or other suitable ionizing solvent, the ionized molecules provide long-chain surface-active free cations which have a terminal nonpolar fluorocarbon tail that is both hydrophobic and oleophobic. The intermediate amido linkage to which the fluorocarbon tail is united enhances solubility of the molecule in water and other polar solvents. Ihe polymethylene chain provides a stable linkage between the nitrogen atom of the amido group and the quaternary nitrogen atom and also serves to enhance solubility in' oils and waxes. The terminal organic Q structure united to the quaternary nitrogen atom renders the cation or complete molecule oil-soluble at this end. The quaternary nitrogen atom imparts greatly increased solubility in water and other ionizing solvents. Thus the molecule is water-soluble and oil-soluble, and is oleo- "phobic at one end and olephilic at the other end. It is repellent to water, oils and hydrocarbons at the fiUOIO.

carbon end and yet is soluble therein at the quaternary nitrogen end.

This makes possible molecules that can be dissolved both in water and in oils and waxes and yet will concentrate at the surface to form an oriented surface layer having the fluorocarbon tails pointing outwardly. A surface results that is outwardly nonpolar and is both' water and oil repellent, and which greatly reduces the surface tension.

the anion (A), Q representing an organic terminal 1 structure which satisfies three of the covalencies of the the fluorocarbon tails oriented outwards to provide a nonpolar fluorocarbon outer surface.

These fluorocarbon quaternary nitrogen compounds provide surface active agents that are highly effective in water and in neutral, acidic and basic aqueous solutions, serving to greatly reduce the surface tension even when present in minute concentrations. The fluorocarbon tail provides a hydrophobic chain that can be even more effective in aqueous solutions than is a much longer hydrocarbon chain such as is employed in corresponding compounds of conventional organic chemistry. Thus a fluorocarbon tail 'containing'7 carbon atoms (a perfluorocapryl chain) is even more effective for this purpose than is a hydrocarbon tail containing 17 carbon atoms (a stearyl chain).

The present compounds provide surface active agents which have amazing utility as additives for oils and Waxes and greatly reduce the surface tension even when present in minute proportion. A high degree of surface tension reduction can be achieved at concentrations of 0.1% by weight or less in animal, vegetable and mineral oils and waxes (the latter being in a dissolved or molten state), including petroleum solvents, gasoline, kerosene, fuel oils, lubricating oils, and parafiin waxes, thereby, for instance, improving such properties as surface protection, flow, spreading, penetration, and atomization or sprayability.

These compounds also have utility as emulsifying agents for fluorocarbon-s and oils (the agent collecting at the interfaces with the fluorocarbon tails dissolved in the fluorocarbon phase and the other portions of the molecules dissolved in the oil phase). Theycan be'used as emulsifying agents for fluorocarbon-water systems.

Other factors remaining the same, the solubility of the present compounds both in water and in oils. decreases.

bonyl-bonded hydrocarbon tail decreasesas to. water;

solubility. but increase as to oil solubility with. increase in length of this chain.

The properties of the compounds can be varied to best serve a desired particular use by varying tbelength. of the fluorocarbon tail, the length of the. intermediate polymethylene chain, and the nature of the nitrogenbonded Q structure. However, it is critical that the molecule have :a fluorocarbon tailf containing at least.

three carbon atoms and the preferred number isi5:.to 111'.

It is also of critical importance that;the. fluorocarbon chain be free from hydrogen atoms, In particular, the presence of even one hydrogen atomon: the last. or next to last carbon atom of the tail will markedly alter the surface active and solubility properties, reducing surface activity and the hydrophobic and oleophobic characteris-. Hydrogen. is electropositivewhereas fluorine is strongly electponegative, hence. the

tics of surface coatings.

presence of hydrogen and fluorine in,the,terminal portion of the tail renders it polar instead of nonpolar; and also,renders the tail less stable to heating owing to the opportunity for dehydrofluorination and provides opportunity for chemical attack.

In general, the halide salts and sulfate salts are most convenient and useful to employ as surface active agents; and they can be readily prepared by processes illustrated in the subsequent examples. In dry form the simpler halide salts ar solid crystalline ionic substances. They are stable and are soluble to sparingly soluble in water and in oils (the solubility decreasing with increase in number of fiuorinated carbon atoms).

The correspondinghydroxides can be obtained by re-.

It is. a feature of my compounds that a wide varietyof oleophilic cationogenic groups (NQ) can be em-.

ployed, cyclic as well as noncyclic. This portion ofthe molecule is the same as in the corresponding quaternary.

compounds of conventional organic chemistry, the distinctive fluorocarbon tail being at the otherend of the molecule, and a wide variety will be evident to those skilled in the :art of quaternary surface active agents.

Thus the quaternary nitrogen atom can be bonded to three hydrocarbon side groups, forming quaternary ni,

trogen compounds of the type:

where R, R" and R are hydrocarbon groups, such as alkyl, cyclohexyl, alkaryl and aryl groups. Preferred compounds of this type are those in which R and R" are alkyl groups each containing one to six carbon atoms (1': e., methyl, ethyl, propyl, butyl, amyl or hexyl groups),

and R is astable oleophilic hydrocarbon group, such as and the nitrogen atom is also bonded to a side group,

is predominately cationic and basic.

4 for instance an alkyl group, as illustrated by compounds of. the following p The above compounds can be readily prepared from the corresponding amine starting compounds which contain a trivalent nitrogen atom, by quaternizing with a compound of the RA type which provides the nitrogenbonded R group and A anion of the product, as by using a halide or a sulfate quaternizing agent.

A further type of compound is represented by the above formulas when the R group is a normal alkylenecarboxyl group, i. e., an N-bonded normal alkyl chain in which the terminal methyl group has been replaced by an anionogenic carboxyl group; the terminal carboxyl group thus being united to the quaternary nitrogen through a methylene or polymethylene linkage containing oneto six carbon, atoms. These compounds can be made by quaternizing with a halogenated monocarboxylic acid, such as chloroacetic acid. The corresponding specific formulas of thesecompounds are:

a positivecharge at thequaternary nitrogen position, and.

itisacidic and has a negative charge at the carbonyl position. In strongly acidic solutions, ionization occurs mainly at the quaternary nitrogen position and the molecule In strongly basic solutions, ionization occurs mainly at the carboxyl position and themoleculeis predominately anionic-and acidic. In the weakly-acidic toweakly-basic range, the ionized molecule shifts from being predominately cationic and basic to being predominately anionic and acidic, but always has both characteristics in appreciable degree since the ionization sites are separated in the molecule. The carboxyl group is, hydrophilic and increases the watersolubility of the molecule, but it does not prevent the NQY: structure; from being oleophilic as a Whole.

Theparboxyl hydrogen atom can be substituted by a metal atomloform salts (e.. g., the sodium and potassiunrsalts) and the .carboxylate group in such compounds is also hydrophilicand anionic. Hydrolysis in acidic solutions yields the, corresponding acid.

The carboxyl hydrogenatom can be substituted by an allsyl group toiormesters (e. g., the methyl and. ethyl esters). ing with a halogenated monocarboxylic ester (such as methyl .chloroacetate) ing acid,

Thesecarhqxylic acid, salt, andcster compounds inap- The esters. can be made directly by quaterniz-v Hydrolysisyields the correspond.

propriate aqueous solutions all yield i'onized molecular structures which can be represented by the generic formula:

( HghOOO' H2 COOH Corresponding salts and esters can also be prepared.

The quaternary nitrogen atom can be present in a pyridine ring, which satisfies the three available valencies, thus providing quaternary pyridinium compounds:

This type of compound can be readily made by reacting pyridine with a perfluoroalkyl-amidopolymethylene halide.

The following table lists illustrative quaternary compounds that have been prepared and shows the remarkable reductions in surface tension produced when a minute amount is dissolved in water, in oils and in a Wax; the first row giving the surface tension values thereof in the absence of the additive. The formulas are given in a simplified or abbreviated form but can be readily related to the kind of structural formulas used elsewhere. All values were measured at 25 C. except in the case of the wax, which was a micro-crystalline type paraflin wax and the surface tension values were measured at 100 C. with the wax thus being in a melted fluid state.

These tertiary amine starting compounds are described in more detail and are claimed in my companion application filed of even date herewith, S. N. 424,789.

The following illustrative experiment relates to the specific reaction: c1r.5o0NHc,n@N oH, can

CH3 C7F15CONHC:HoN CH3 I CH2 In this example, N,N-dimethyl-N'-perfluorocaprylarnidopropyleneamine is reacted with methyl iodide to make trimethyl (gamma-perfluorocaprylamido)propylene ammonium iodide, which has a fluorocarbon tail containing seven carbon atoms.

A 1000 ml. l-necked flask was charged with 426 grams (0.965 mole) of ethyl perfluorocaprylate,

CrFisCOOCzHs and 200 ml. of absolute diethyl ether. The flask was cooled in an ice bath and 98.2 grams (0.965 mole) of dimethylaminopropyleneamine, H2NC3HeN(CI-Ia)2, was added slowly enough to maintain a temperature below 35 C. in the flask. The flask was removed from the ice bath, allowed to warm to room temperature, and was then placed under a 5 plate column for vacuum distillation. As the reduced pressure was slowly applied, the ether distilled off to leave the above-mentioned perfluorocapryl amine product which was distilled off at about 20 mm. vacuum at the boiling range (154-158 C.). A total of 440 grams (0.882 mole) was obtained. The refractive index was 1.3559. The 440 grams of this product was mixed with 1000' ml. of absolute diethyl ether and 213 grams of methyl iodide (1.5 moles) in an unstoppered 3000 ml. Erlenmeyer flask, and left standing overnight. The quaternary ammonium iodide salt product was dried by pouring the reaction mixture into a large evaporating dish which was placed in a hood draft to evaporate off the ether. The dried salt was a free-flowing whitepowder, which dissolves easily in water, and which has a melting point of 148150 C.

SURFACE TENSIONS (DYNES/ CM.) WITH AND WITHOUT ADDITIVES 9 Min- Lin- Melted Water eral seed Wax Oil Oil Value without additive 72 31 32 27 Amount of additive (percent by wt.) 0.05 0. 1 0. 1 0. 1

H I n rscoNH N(CH I O7F 5CONHC3HAN(CH3)2(CH3G0H5) O1 The preparation of the 3d, 9th, 10th and last compounds listed above are specifically described in the following Examples 1, 2, 3 and 4, respectively.

Example 1 It was identified as the desired compound mentioned above. "Analysis showed 4.33% N (calc. 4.37%) and 19.9% I (calc. 19.8%). i

Data indicating the powerful surface activity of this compound have been given in the preceding table. Its water-solubility and strong surface tension reduction activity in water are in diametric. contrast to the tertiary amine starting compound. Further illustration of surface activity is provided by the following demonstration experiments:

(A) A clean glass slide was coated with a thin film of water. A speck of the quaternary salt was dropped on the film and it caused an immediate separation of the film and a dry area was formed on the glass. The glass in this area had become plated with the cations and the added to the water, causing the "water to spread out to an area of 3.45 sq. cm., owing to the reduction in surface tension.

(C) A 1% (by weight) solution of the quaternary salt in water was prepared. When a drop was placed on a sheet of writing paper, complete penetration occurred in a few seconds. The sameresult was obtained using a piece of nylon cloth and a piece of cardboard, penetration in these cases being almost instantaneous. Drops of pure water when applied to these materials did not penetrate. Thus the quaternary salt served as a highly effective wetting agent. I

This compound in minute proportion (e. g., 30 p. p. m.)

greatly inhibits the evaporation of volatile hydrocar-- bons, such as gasoline, owing to formation of a surface barrier film.

In the above example, the methyl iodide reacts readily in a mild'exothermic reaction and no heating is required. The use of methyl iodide as a quaternizing agent is convenient in laboratory work because it readily reacts and it is a liquid at room temperature, whereas the other methyl halides (methyl bromide, methyl chloride and methyl fluoride) are gases at room temperature. and must be reacted in a pressure vessel. The higher halides which are liquid at room temperature can be conveniently employed, although heating is generally required because they react more sluggishly.

Thus the same perfluorocapryl amine that was employed in the above example was quaternized with benzyl chloride and with n-decyl bromide. In both cases the reaction mixture was heated for 2 hours at 100 C., and the solid salt product was washed with ether to remove unreacted material, and dissolved in water. Data on the quatearnary product compounds are included in the foregoing table.

Similarly, amine starting compounds in which the nitrogen atom of the terminal amine group is a member of a heterocyclic ring (e. g., a piperidine ring or a morpholine ring) which satisfies two valence bonds, can be quaternized with a hydrocarbon halide.

Example 2 In this example, beta-perfluorocaprylamidoethylene chloride is reacted with pyridine to yield beta-perfluorocaprylamidoethylene pyridinium chloride.

A 250 ml. Erlenmeyer flask cooled in an ice bath was charged with 100 ml. of absolute diethyl ether and 44.2 grams (0.1 mole) of ethyl perfluorocaprylate,

C'IFI5COOC2H5 Then 6.1 grams (0.1 mole) of ethanolarnine,

H2NC2H4OH was slowly added and the mixture was left standing for one hour. The mixture was poured into a fiat evaporatexhibited strong surface active properties.

ing dish and the ether and alcohol allowed to evaporate. The product, obtained in a quantitative yield of 45 grams, was a white crystalline solid having a melting point of -82 C., and was identified as the amido alcohol derivative, C7F15CONHC2H4OH. A 50 ml. 1- necked flask topped by a reflux condenser Was charged with 22.5 grams (0.05 mole) of this amido alcohol and 6-grams (0.5 mole) of thionyl, chloride, ,SOClz. The mixture was refluxed for30' minutes and poured into, coldwater. The white solid separating was filtered out, washed with cold water, and air-dried overnight. The yield was quantitative. This product was identified as the desired beta-perfiuorocaprylamidoethylene chloride. It was converted to the desired quaternary salt by overnight refluxing with pyridine, using equal parts by weight mixed with 10 parts water. The product was a homogeneous solution of the quaternary pyridinium chloride salt, and the latter could be obtained in free form by evaporating the Water.

The extreme surface activity of this quaternary pyridiuium salt. is indicated by the fact that it reduces the surface tension of water at 25 C. from 72 to 18 dynes/cm. at a concentration of only 0.005% by weight (50 mgrper liter), and to 15 dynes/ cm. at a concentration of 0.01%. It reduces the surface tension of kerosene at 25 C. from 26 to 21 dynes/cm. at a concentration of 0.1%. Other data are given in the foregoing table. This compound has been found to be highly effective as an ore flotation agent.

Example 3 This example illustrates theuse of sulfates as quaterniziug agents in place of using halide agents that have been illustrated in Example 1. Specifically, N,N-diethyl- N-perfiuorocaprylamidoethyleneamine is reacted with dimethyl sulfate to make methyldiethyl(gamma-perfluorocaprylami-do)ethylene ammonium methylsulfate:

C 7F sCONHC;H4N CgHs CHsSOF A ml. Erlenmeyer flask was charged with 5.12 grams (0.01 mole) of the above-mentioned amine and then with 1.26 grams (0.10 mole) of dimethyl sulfate. A very exothermic reaction resulted and the mixture solidified. The solid product was dissolved in water and Data are given in the foregoing table.

Example 4 A 250 ml. Erlenmeyer flask was charged with 15.5 grams (0.03 mole) of the N,N-diethyl-N'-perfluorocaprylamidoethyleneamine and then with 2.8 grams.

(0.03 mole) of chloroacetic acid, and the mixture was heated to -450 C. Upon cooling, the viscous liquid product solidified at about 5560 C., forming a lightbrown water-soluble solid having strong surface active properties. Data are given in the foregoing table.

I claim: 1. The new and useful perfluoroalkyl amidopolymethylene quaternary ammonium compounds represented by the formula:

where n has an integer value of 3 to 11, m has an integer value of 2 to 6, A is an anion, R and R" are alkyl groups each containing 1 to 6 carbon atoms, and R is an alkyl group containing 1 to 17 carbon atoms.

3. The new and useful perfluoroalkyl-amidopolymethylene quaternary ammonium compounds represented by the formula:

where n has an integer value of 3 to 11, m has an integer value of 2 to 6, A is an anion, R and R are alkyl groups each containing 1 to 6 carbon atoms, and the CHzCsHs group is a benzyl group.

4. Trimethyl(gamma perfiuorocaprylamido)propyl ene ammonium iodide, having the formula:

C'ZF15CONHC3H6N(CH3)3I 2mm References Cited in the file of this patent UNITED STATES PATENTS 2,567,011 Diesslin et a1. Sept. 4, 1951 2,568,500 Husted et a1. Sept. 18, 1951 2,593,737 Diesslin et a1. Apr. 22, 1952

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2567011 *Jan 10, 1949Sep 4, 1951Minnesota Mining & MfgFluorocarbon acids and derivatives
US2568500 *Oct 6, 1949Sep 18, 1951Minnesota Mining & MfgFluorocarbon aldehydes and their monohydrates
US2593737 *Jun 27, 1951Apr 22, 1952Minnesota Mining & MfgPerfluorinated cyclohexyl carboxylic acid and cyclohexyl acetic acid and derivatives
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2990417 *Oct 19, 1959Jun 27, 1961Du Pont1, 2-bis
US3066100 *Dec 7, 1959Nov 27, 1962Gulf Research Development CoPrevention of foaming of oils
US3147065 *May 2, 1960Sep 1, 1964Minnesota Mining & MfgQuaternized halomethylamides
US3186546 *Mar 12, 1962Jun 1, 1965Gen Mills IncFlotation separation of particulate materials in non-aqueous media
US3188340 *Dec 8, 1961Jun 8, 1965Du PontPolyfluoro alkanamidoalkyl phosphates
US3238235 *Apr 29, 1963Mar 1, 1966Pennsalt Chemicals CorpFluorinated amido carboxylic acids and salts thereof
US3258423 *Sep 4, 1963Jun 28, 1966Richard L TuveMethod of extinguishing liquid hydrocarbon fires
US3382032 *Dec 12, 1961May 7, 1968Omega Chemicals CorpInhibition of volatilization of volatile organic compounds
US3423417 *Apr 20, 1965Jan 21, 1969Us ArmyFluoroalkylamidomethylpyridinium compounds
US3428709 *Aug 22, 1966Feb 18, 1969Geigy Chem CorpPolymers of n-perfluoboalkanoylamino-and n-perfluoroalkanoylaminoalkyl acrylamides and methacrylamides
US3514322 *Jul 30, 1968May 26, 1970Us ArmyNatural and synthetic fibrous materials treated with a fluoroamidomethylpyridinium compound
US3655555 *Oct 31, 1969Apr 11, 1972Goldschmidt Ag ThFire extinguishing foam concentrate comprising an organic fluorine compound and a solubilizing agent
US3899563 *Jul 23, 1973Aug 12, 1975Allied ChemSynthetic fibers having improved soil and stain repellency
US4098811 *Dec 2, 1976Jul 4, 1978Ciba-Geigy CorporationPerfluoroalkylthioamido amine and ammonium compounds
US4136019 *Jun 13, 1977Jan 23, 1979United States Borax & Chemical Corp.Production of high purity fluorspar and barite concentrates from a complex fluorspar ore
US4186083 *Dec 21, 1977Jan 29, 1980American Cyanamid CompanyProcess for froth flotation of non-sulfide minerals
US4377710 *Mar 8, 1982Mar 22, 1983Nalco Chemical CompanyQuaternized epichlorohydrin adducts of perfluoro substituted ethanols
US4484990 *Jun 16, 1980Nov 27, 1984Minnesota Mining And Manufacturing CompanyMist suppressant for solvent extraction metal electrowinning
US4486391 *Aug 18, 1982Dec 4, 1984Dainippon Ink And Chemicals, Inc.Separation and recovery of ionic substances by fluorine-containing compound
US4859349 *Oct 9, 1987Aug 22, 1989Ciba-Geigy CorporationPolysaccharide/perfluoroalkyl complexes
US5159105 *Feb 28, 1990Oct 27, 1992Minnesota Mining And Manufacturing CompanyHigher pentafluorosulfanyl-fluoroaliphatic carbonyl and sulfonyl fluorides, and derivatives
US5207996 *Oct 10, 1991May 4, 1993Minnesota Mining And Manufacturing CompanyAcid leaching of copper ore heap with fluoroaliphatic surfactant
US5286352 *Jul 15, 1992Feb 15, 1994Minnesota Mining And Manufacturing CompanyElectrochemical production of higher pentafluorosulfonyl acid fluorides
US5576074 *Aug 23, 1995Nov 19, 1996Minnesota Mining And Manufacturing CompanyLaser write process for making a conductive metal circuit
US5652282 *Sep 29, 1995Jul 29, 1997Minnesota Mining And Manufacturing CompanyLiquid inks using a gel organosol
US5698616 *Sep 30, 1996Dec 16, 1997Minnesota Mining And Manufacturing CompanyLiquid inks using a gel organosol
US5750260 *Nov 22, 1996May 12, 1998Imation CorpDevelopment/transport rollers having a fluorocarbon coating for use in automated thermal development equipment
US5821195 *Aug 16, 1996Oct 13, 1998Monsanto CompanySequential application method for enhancing glyphosate herbicidal effectiveness with reduced antagonism
US5852148 *Feb 4, 1997Dec 22, 1998Minnesota Mining & Manufacturing CompanyPerfluoroalkyl halides and derivatives
US5882466 *Aug 8, 1996Mar 16, 1999Minnesota Mining And Manufacturing CompanyAqueous bonding composition
US5985793 *Aug 14, 1997Nov 16, 1999Monsanto CompanySequential application method for treating plants with exogenous chemicals
US5998521 *Nov 4, 1996Dec 7, 19993M Innovative Properties CompanyAqueous fluoropolymer compositions and method of preparing the same
US6013795 *Nov 4, 1996Jan 11, 20003M Innovative Properties CompanyAlpha-branched fluoroalkylcarbonyl fluorides and their derivatives
US6015838 *Nov 4, 1996Jan 18, 20003M Innovative Properties CompanyAqueous film-forming foam compositions
US6048952 *Feb 4, 1997Apr 11, 20003M Innovative Properties CompanyPerfluoroalkyl halides and derivatives
US6255363Sep 26, 1996Jul 3, 20013M Innovative Properties CompanyLiquid inks using a gel organosol
US6365769Feb 15, 2000Apr 2, 20023M Innovative Properties CompanyPerfluoroalkyl halides and derivatives
US6582759Apr 26, 2002Jun 24, 20033M Innovative Properties CompanyOptical elements comprising a fluorinated surface treatment comprising urethane, ester or phosphate linkages
US6632508Oct 27, 2000Oct 14, 20033M Innovative Properties CompanyOptical elements comprising a polyfluoropolyether surface treatment
US6734227Sep 24, 2001May 11, 20043M Innovative Properties CompanyOptical elements comprising a fluoropolymer surface treatment
US6815040Oct 24, 2001Nov 9, 20043M Innovative Properites CompanyOptical elements comprising a polyfluoropolyether surface treatment
US6884510Apr 29, 2003Apr 26, 20053M Innovative Properties CompanyOptical elements comprising a fluorinated surface treatment comprising urethane, ester or phosphate linkages
US6905754Apr 26, 2002Jun 14, 20053M Innovative Properties CompanyOptical elements comprising fluorochemical surface treatment
US6992045Nov 19, 2001Jan 31, 2006Monsanto Technology LlcPesticide compositions containing oxalic acid
US7008904Feb 13, 2001Mar 7, 2006Monsanto Technology, LlcHerbicidal compositions containing glyphosate and bipyridilium
US7135437Nov 19, 2001Nov 14, 2006Monsanto Technology LlcStable liquid pesticide compositions
US7309372Nov 1, 2006Dec 18, 2007Donaldson Company, Inc.Filter medium and structure
US7314497Nov 4, 2005Jan 1, 2008Donaldson Company, Inc.Filter medium and structure
US7723265Aug 17, 2005May 25, 2010Monsanto TechnologyPesticide compositions containing oxalic acid
US7893186Dec 27, 2007Feb 22, 20113M Innovative Properties CompanyProcess for preparing long-chain polymethylene halide telomers
US7985344Nov 20, 2007Jul 26, 2011Donaldson Company, Inc.High strength, high capacity filter media and structure
US7989392Mar 6, 2006Aug 2, 2011Monsanto Technology, LlcHerbicidal compositions containing glyphosate bipyridilium
US8021455Feb 21, 2008Sep 20, 2011Donaldson Company, Inc.Filter element and method
US8021457Nov 5, 2004Sep 20, 2011Donaldson Company, Inc.Filter media and structure
US8057567May 1, 2006Nov 15, 2011Donaldson Company, Inc.Filter medium and breather filter structure
US8177875Jan 31, 2006May 15, 2012Donaldson Company, Inc.Aerosol separator; and method
US8236425Dec 27, 2007Aug 7, 20123M Innovative Properties CompanyLong-chain polymethylene halide telomers
US8267681Sep 18, 2012Donaldson Company, Inc.Method and apparatus for forming a fibrous media
US8268033May 18, 2011Sep 18, 2012Donaldson Company, Inc.Filter medium and structure
US8277529Aug 31, 2011Oct 2, 2012Donaldson Company, Inc.Filter medium and breather filter structure
US8404014Feb 21, 2006Mar 26, 2013Donaldson Company, Inc.Aerosol separator
US8460424May 1, 2012Jun 11, 2013Donaldson Company, Inc.Aerosol separator; and method
US8512431Sep 12, 2012Aug 20, 2013Donaldson Company, Inc.Fine fiber media layer
US8512435Aug 22, 2012Aug 20, 2013Donaldson Company, Inc.Filter medium and breather filter structure
US8524041Aug 20, 2012Sep 3, 2013Donaldson Company, Inc.Method for forming a fibrous media
US8641796Sep 14, 2012Feb 4, 2014Donaldson Company, Inc.Filter medium and breather filter structure
US8709118Jan 10, 2013Apr 29, 2014Donaldson Company, Inc.Fine fiber media layer
US8889230Aug 17, 2007Nov 18, 20143M Innovative Properties CompanySide chain fluorochemicals with crystallizable spacer groups
US9114339Sep 14, 2012Aug 25, 2015Donaldson Company, Inc.Formed filter element
US20030091794 *Sep 24, 2001May 15, 20033M Innovative Properties CompanyOptical elements comprising a fluoropolymer surface treatment
US20030203186 *Apr 26, 2002Oct 30, 2003Naiyong JingOptical elements comprising fluorochemical surface treatment
US20030207119 *Apr 29, 2003Nov 6, 20033M Innovative Properties CompanyOptical elements comprising a fluorinated surface treatment comprising urethane, ester or phosphate linkages
US20060019830 *Aug 17, 2005Jan 26, 2006Monsanto Technology LlcPesticide compositions containing oxalic acid
US20060148648 *Mar 6, 2006Jul 6, 2006Monsanto Technology LlcHerbicidal compositions containing glyphosate bipyridilium
US20090312517 *Dec 27, 2007Dec 17, 2009Yu YangProcess for preparing long-chain polymethylene halide telomers
US20100093925 *Dec 27, 2007Apr 15, 2010Moore George G ILong-chain polymethylene halide telomers
US20100234521 *Aug 17, 2007Sep 16, 2010Flynn Richard MSide chain fluorochemicals with crystallizable spacer groups
DE2753095A1 *Nov 29, 1977Jun 8, 1978Ciba Geigy AgPerfluoralkylthioamido-amin- und -ammoniumverbindungen
EP1820553A2Aug 9, 2001Aug 22, 2007Donaldson Company, Inc.Polymer, polymer microfiber, polymer nanofiber and applications including filter structures
EP1894609A1Nov 4, 2005Mar 5, 2008Donaldson Company, Inc.Filter medium and structure
EP1925352A1Aug 9, 2001May 28, 2008Donaldson Company, Inc.Polymer, polymer microfiber, polymer nanofiber and applications including filter structure
EP2308579A1Nov 4, 2005Apr 13, 2011Donaldson Company, Inc.Aerosol separator
EP2311542A1Nov 4, 2005Apr 20, 2011Donaldson Company, Inc.Aerosol separator
EP2311543A1Nov 4, 2005Apr 20, 2011Donaldson Company, Inc.Aerosol separator
EP2740524A1Aug 9, 2001Jun 11, 2014Donaldson Company, Inc.Filter Structure
WO1996005889A1 *Aug 18, 1995Feb 29, 1996Dynax CorpFluorochemical foam stabilizers and film formers
WO2012129094A1Mar 16, 2012Sep 27, 2012Donaldson Company, Inc.High temperature treated media
Classifications
U.S. Classification554/52, 544/168, 562/565, 516/DIG.100, 558/28, 564/209, 516/DIG.700, 516/69, 209/163, 554/46, 546/233, 546/336, 562/561
International ClassificationB01F17/00
Cooperative ClassificationY10S516/01, B01F17/0057, B01F17/0042, Y10S516/07
European ClassificationB01F17/00M, B01F17/00K