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7619018 |
Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation
A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion containing ferric ions by contacting the fluoropolymer dispersion with...
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7615592 |
Process for producing water- and oil-repellent agent
A water- and oil-repellent agent is produced by subjecting (a) a polyfluoroalkyl group-containing (meth)acrylate and (b) a fluorine atom-free polymerizable monomer to an emulsification treatment in...
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7544753 |
Process for producing elastic fluorocopolymer and crosslinked fluororubber
A process for producing an elastic fluorocopolymer, by emulsion-polymerizing at least one fluoromonomer (a), a vinyl ester monomer (b) represented by the formula CR 1 R 2 ═CR 3 COOCH═CH 2 ...
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7358296 |
Aqueous dispersions of fluoropolymers
Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a non ionic emulsifier, removing the fluorine-containing emulsifier by contact with an...
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7304101 |
Method of purifying a dispersion of ionic fluoropolymer
Anionic species are removed from aqueous dispersions of ionic fluoropolymers using anion exchange resins. In some embodiments, cationic species are also removed using cation exchange resins.
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7300989 |
Dispersions containing bicomponent fluoropolymer particles and use thereof
The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether) homopolymers. The present invention further relates to a method of making an aqueous...
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7262246 |
Emulsion polymerization of fluorinated monomers
The use of perfluorinated polymers and/or fluorinated ionomers as surfactant emulsifiers in emulsion polymerization of fluorinated monomers.
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7214740 |
Fluorinated ionomers with reduced amounts of carbonyl end groups
The present invention is a fluoropolymer comprising a plurality of pendent groups terminating in —CF 2 SO 3 X, —CF 2 SO 2 F, or combinations thereof, where X is selected from a group consisting...
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7189780 |
Processes to produce water-dispersible polyester stabilized, acid-treated, fluoroalkyl compositions
A process to produce an acid-treated aqueous dispersion is provided. The process comprises contacting a polymer, a water dispersible polyester, water, and at least one acid-generating compound;...
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7186772 |
Coating composition for forming self-layering or self-coating lacquer systems
Self-coating or self-layering lacquer systems from at least two different resins, oligomers, or polymers, which are emulsifiable or dispersible in water, have different surface tensions, and form...
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7186769 |
Water-dispersible polyester stabilized fluoroalkyl compositions
In this invention, an aqueous dispersion is provided to improve the oil and water repellency of materials. The aqueous dispersion comprises a polymer, at least one water dispersible polyester, and...
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7138438 |
Polymeric nanoparticle formulations and their use for improving the dirt pick up resistance of a coating
A formulation for repelling particulate matter on the surface of a coating comprising polymeric nanoparticles having a mean particle diameter of from 1 to 50 nm. The polymeric nanoparticles may...
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7125941 |
Aqueous emulsion polymerization process for producing fluoropolymers
The present invention provides a method of making a fluoropolymer through emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated...
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7101924 |
Water-dispersible polyester stabilized, acid-treated, fluoroalkyl compositions
In this invention, an acid treated, aqueous dispersion is provided that improves the oil and water-repellency of materials. The acid-treated, aqueous dispersion comprises at least one polymer, at...
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7071271 |
Aqueous emulsion polymerization of functionalized fluoromonomers
A method is provided for aqueous emulsion co-polymerization of two or more fluoromonomers comprising the steps of: 1) forming an aqueous pre-emulsion by mixing a fluoromonomer according to formula...
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7045571 |
Emulsion polymerization of fluorinated monomers
The use of perfluorinated polymers and/or fluorinated ionomers as surfactant emulsifiers in emulsion polymerization of fluorinated monomers.
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7022811 |
3,4-Alkylenedioxythiophene compounds and polymers thereof
A thiophene compound represented by formula (I):
wherein A represents a C 1-5 -alkylene bridge substituted with at least one fluorine atom and/or at least one alkyl group substituted with a...
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6984697 |
Fluoropolymers resistant to stress cracking
The invention provides a fluorothermoplastic composition comprising interpolymerized units derived from about 94 to about 97.5 mole percent (mol %) tetrafluoroethylene (TFE), about 2 to about 3 mol...
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6956078 |
Concentrated fluoropolymer dispersions
An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.225 and about 2 to about 11...
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6872324 |
Aqueous dispersion
An aqueous dispersion comprising a polymer (a) having a repeating unit (A) which comprises four carbon atoms connected in a linear chain and which has one double bond at the second position and a...
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6869997 |
Polymerization of fluoromonomers using a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant
Fluoropolymers are prepared by a process comprising polymerizing at least one fluoromonomer in an aqueous reaction medium containing monomer, a radical initiator and a...
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6861466 |
Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant
In an aspect of the invention, a fluoropolymer dispersion, preferably a PTFE dispersion, is provided that comprises fluoropolymer particles having an average particle size of 10 to 400 nm dispersed...
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6790898 |
Preparation of fluorinated core-shell particles with water and oil repellency
The present invention relates to preparation of fluorinated core-shell particles with water and oil repellency, and more particularly, to preparation of emulsion-type coating material with good...
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6774164 |
Process for producing fluoroelastomers with fluorinated anionic surfactants
A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF 2 CF 2 ) n —CH 2 CH 2 SO 3 M,...
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6759477 |
Method for preparing imides from sulfonyl fluorides
This invention discloses a method for preparing imides (I) and (II) from compounds having a sulfonyl fluoride functional group. The imides so prepared are useful in a variety of catalytic and...
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6734227 |
Optical elements comprising a fluoropolymer surface treatment
The present invention relates to optical elements comprising fluorochemical surface treatments. The invention further relates to articles such as retroreflective sheetings, pavement markings and...
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6710123 |
Fluoropolymers containing organo-silanes and methods of making the same
A fluoropolymer is described which is a polymer reaction product of a fluoropolymer comprising a polymer reaction product of a) at least one first alkylene co-monomer containing at least one...
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6706803 |
Synthesis of perhalogenated thermoplastic (CO)polymers of chlorotrifluoroethylene
A process for the synthesis of chlorotrifluoroethylene (PCTFE) (co)polymers, containing at least 80% by moles of CTFE, being the complement to 100 one or more fluorinated monomers, preferably the...
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6660803 |
Method of preparing (perfluoroalkyl) ethyl acrylic esters and methods of preparing copolymers using said esters
A polyfluoroalkyl iodide is reacted with a (meth)acrylic acid metal salt to form a corresponding polyfluoroalkyl (meth)acrylate ester. The polyfluoroalkyl (meth)acrylate ester is separated from the...
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6642307 |
Process for producing fluoropolymer
In the emulsion obtained by forcedly emulsifying by applying a high shearing force on the water insoluble liquid in the presence of a small amount of emulsifying agent, at least one of...
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6639011 |
Polymerization process of sulphonic monomers
A polymerization process in aqueous emulsion of: (I) one or more fluorinated monomers containing at least one ethylene unsaturation; (II) one or more fluorinated monomers, containing sulphonyl...
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6624268 |
Aqueous dispersion for water-and-oil repellant and process for producing the same
A water and oil repellent aqueous dispersion is provided which is excellent in water and oil repellency and waterdrop rolling property and has dispersion stability even in the presence of co-agents...
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6576703 |
Process for the preparation of aqueous dispersions of fluoropolymers
Process for the preparation of a dispersion based on homopolymers/copolymers of tetrafluoroethylene (TFE), said dispersion having a bimodal or multimodal distribution of the particle diameters,...
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6503988 |
Polytetrafluoroethylene fine powders and their use
A polytetrafluoroethylene fine powder excellent in powder flowability which comprises fine particles (the primary particle) having a mean particle diameter of 0.05 to 1 μm, an apparent density of...
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6500894 |
Hydro- oil-repellent compositions
Compositions formed of aqueous dispersions comprising a mixture of the following fluorinated polymers: A) (meth)acrylic (co)polymers containing fluorine, and B) cationic ionomers of fluorinated...
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6451717 |
Highly durable oil/water repellents for textiles
The present invention comprises an aqueous emulsion for imparting oil and water repellency to textiles prepared by polymerizing a mixture of monomers (a), (b) and (c) as follows: (a) 70-90%...
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6429258 |
Polymerization of fluoromonomers
Aqueous dispersion polymerization of fluoromonomers is improved by using a combination of fluorosurfactants, one of which is a perfluoropolyether carboxylic acid or salt.
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6383569 |
Compositions and methods to protect calcitic and/or siliceous materials
Calcitic and/or siliceous particulate materials are provided with increased resistance to penetration by water, oil or grease damage from water, oil or grease by a process which comprises treating...
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6376592 |
Water dispersion type water and oil repellent composition
A water dispersion type water and oil repellent composition obtained by polymerizing the following polymerizable monomer mixture (b) in the presence of a compound (a) having a blocked isocyanate...
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6348516 |
Method for producing solution of polymers functionalized by acid groups by microwave radiation
Process for using microwave irradiation to prepare solutions of polymers functionalized with acid groups The invention relates to a process for preparing aqueous, hydrous and anhydrous solutions of...
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6310142 |
Fluoroelastomer compositions
Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer containing iodine and/or bromine and formed of tetrafluoroethylene (TFE)...
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6306958 |
Aqueous dispersions for textile finishing
Aqueous dispersions comprising as component A) a compound containing two or more blocked isocyanate groups in the molecule and as component B) a compound obtainable by reacting a diepoxy compound...
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6288160 |
Aqueous dispersion and waterproofing material
It is an object of the present invention to provide an aqueous dispersion and a waterproofing agent, which are of the aqueous one-component type and easy and simple to apply and have both a...
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6284853 |
Copolymer and stainproofing agent containing the same
The present invention provides a copolymer whose durability on cleaning is improved while maintaining good water- and oil-repellency. Disclosed is a copolymer having: (i) a fluoroalkyl group, ...
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6225403 |
Method and composition for treating fibrous substrates to impart oil, water and dry soil repellency
The present invention relates to a method and composition for treating textile fibers or substrates, to thereby impart oil, water and soil repellency at substantially reduced add on levels of...
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6218464 |
Preparation of fluorinated polymers
Disclosed is a method for preparing fluorinated emulsion polymers that reduces or eliminates the need for fluorinated surfactants comprising the steps of: a) providing a reaction mixture...
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6156839 |
Aqueous dispersion of small particles of polytetrafluoroethylene
An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves...
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6153681 |
Tetrafluoroethylene and n-alkyl-trifluorovinyl ether copolymer compositions having discreet elastomeric and crystalline sections
Compositions which act as thermoplastic elastomers are disclosed which have an elastomeric polymer portion and a crystalline polymer portion. Also disclosed is the manufacture of thermoplastic...
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6153675 |
Fluorinated water-and oil-repellent agents with improved freeze-thaw stability
A water-dispersible, water- and oil-repellent agent, which comprises an aqueous emulsion comprising a copolymer of a fluoroalkyl group-containing monomer with vinylidene chloride or benzyl...
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6130298 |
Soil-resistant finish
A stainproof treatment agent containing: (A) a fluoroalkyl group-containing copolymer having (I) a repeating unit derived from a monomer having a fluoroalkyl group, (II) a repeating unit...
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