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Tetrafluoro patents

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Porous membrane

Date/App# patent app List of recent Tetrafluoro-related patents
 Process for producing 2,3,3,3-tetrafluoropropene patent thumbnailProcess for producing 2,3,3,3-tetrafluoropropene
The present invention relates, in part, to the discovery that high temperatures during the fluorination of 1,1,2,3-tetrachloropropene (hco-1230xa) to 2-chloro-3,3,3-trifluoropropene (hcfo-1233xf) results in catalyst instability, reduced selectivity of the conversion, and/or the formation of one or more undesirable by-products. By controlling the reaction temperature, it is shown that the catalyst life may be extended and the selectivity of the reaction improved.
 Process for producing 2,3,3,3-tetrafluoropropene patent thumbnailProcess for producing 2,3,3,3-tetrafluoropropene
The present invention relates, in part, to the discovery that the presence of impurities in a reactor for dehydrochlorinating hcfc-244bb to hfo-1234yf results in selectivity changeover from hfo-1234yf to hcfo-1233xf. By substantially removing such impurities, it is shown that the selectivity to hfo-1234yf via dehydrochlorination of hcfc-244bb is improved..
 Porous membrane patent thumbnailPorous membrane
A membrane comprises a sheet of expanded polytetrafluoroethylene. The sheet includes a first extrudate made from a first ptfe fine powder resin mixed with processing lubricant at a first lube rate.
 Grease-like gel for repelling rodents patent thumbnailGrease-like gel for repelling rodents
Grease-like compositions are provided for repelling rodents. The compositions utilize nontoxic mineral, synthetic, or vegetable oil based gels containing silica, clay, urea, polytetrafluoroethylene, or metallic soap thickeners and capsaicin..
 Laminate body and method for producing laminate body patent thumbnailLaminate body and method for producing laminate body
The present invention aims to provide a laminate in which a metal and a fluoropolymer are directly and firmly attached to each other. The present invention relates to a laminate including a layer (a) including a metal, and a layer (b) formed on the layer (a), wherein the layer (b) includes a copolymer containing a polymer unit based on tetrafluoroethylene and a polymer unit based on a perfluoro(alkyl vinyl ether), the copolymer contains a carboxyl group at a terminus of a main chain and has a melt flow rate of not lower than 20 g/10 min and a melting point of not higher than 295° c., and the metal is at least one selected from the group consisting of copper, stainless steel, aluminum, iron, and an alloy thereof..
 Tetrafluoropropene-based supercritical heat-transfer fluids patent thumbnailTetrafluoropropene-based supercritical heat-transfer fluids
A method for heating a fluid or a body using a vapour compression circuit containing a heat-transfer fluid containing tetrafluoropropene, said method including, successively and cyclically, evaporation of the heat-transfer fluid, compression of the heat-transfer fluid, cooling of the heat-transfer fluid and expansion of the heat-transfer fluid, the heat-transfer fluid being in the supercritical state at the end of compression. Also, an installation suited to implementing this method..
 Filter medium for air filter  and filter unit patent thumbnailFilter medium for air filter and filter unit
A filter medium for an air filter collecting dust in an air flow has a principal collection layer including a porous polytetrafluoroethylene film. A surface of the filter medium is provided with a plurality of embossed projections.
 Heat transfer compositions patent thumbnailHeat transfer compositions
The invention provides a heat transfer composition comprising up to about 30% by weight carbon dioxide (r-744), from about 30% to about 80% by weight difluoromethane (r-32), and 1,3,3,3-tetrafluoropropene (r-1234ze).. .
 Image forming method patent thumbnailImage forming method
Provided is an image forming method, in which excellent cleaning properties are obtained for a long period of time even when the process is employed to an image forming apparatus with a charging roller for charging a photoreceptor, and a favorable image can be formed while inhibiting occurrence of a black spots-like image defect even in a high temperature and high humidity environment. In the image forming method, charging of a photoreceptor in a charging step is performed by a charging roller.
 Method for coating spark plug threads with a polytetrafluoroethylene mixture patent thumbnailMethod for coating spark plug threads with a polytetrafluoroethylene mixture
The invention relates to a method for coating spark plug threads with a polytetrafluoroethylene mixture comprising the steps of (a) bringing the spark plug to room temperature of 21° c. To 26° c.
Compositions comprising tetrafluoropropene and methods of use thereof
(vi) a sixth composition, wherein said hfo-1243zf or mixture thereof with hfc-152a is at most 20 weight percent of said sixth composition.. .
Blowing agent compositions of hydrofluoroolefins and hydrochlorofluoroolefins
The present invention relates to blowing agent compositions comprising (1) at least one hydrofluoroolefin (hfo) and (2) at least one hydrochlorofluoroolefin (hcfo) used in the preparation of foamable thermoplastic compositions. The hfos of component (1) include, but are not limited too, 3,3,3-trifluoropropene (hfo-1243zf), 1,2,3,3,3 -pentafluoropropene (hfo-1225ye), cis- and/or trans-1,3,33-tetrafluoropropene (hfo-1234ze), and 2,3,3,3-tetrafluoropropene (hfo 1234yf), and mixtures thereof.
Skived film for covering surface of plug for medical purposes, plug for medical purposes using said film, pre-filled syringe using said plug and method for producing said film
Provided is a ptfe skived film capable of exhibiting, with a single layer, sliding properties, barrier properties with regard to a liquid contact surface, and excellent tear resistance during injection molding. This skived film is characterized by being obtained by cutting a polytetrafluoroethylene block or a modified polytetrafluoroethylene block subjected to a thermal fusion treatment under reduced pressure or subjected to a pressurized thermal fusion treatment after being subjected to fusion under reduced pressure..
Low gloss, air permeable, abrasion resistant, printable laminate containing an asymmetric membrane and articles made therefrom
Asymmetric expanded polytetrafluoroethylene (eptfe) membranes that contain multiple layers of eptfe where at least one layer of eptfe has a microstructure different from the microstructure of a second eptfe layer. In exemplary embodiments, the asymmetric membrane contains a first eptfe layer that has an “open” microstructure and a second eptfe layer that has a less open, or “tight” microstructure.
Blended fluoropolymer compositions
Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer.
Aerosol for controlling indoor insect pest
And more preferably at least one compound selected from the group consisting of imiprothrin, tetramethrin, prallethrin, transfluthrin, metofluthrin, dimefluthrin, 2,3,5,6-tetrafluoro-4-methylbenzyl 2,2-dimethyl-3-(1-propenyl)cyclopropanecarboxylate and the like.. .
Method for producing aqueous polytetrafluoroethylene dispersion
The present invention aims to provide a novel method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles. The present invention relates to a method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles, the method including polymerizing tetrafluoroethylene in an aqueous medium in the presence of perfluoro hexanoic acid or its salt..
Method for producing porous polytetrafluoroethylene membrane
Provided is a method including: a step a of extruding a mixture containing a polytetrafluoroethylene (ptfe) fine powder having a standard specific gravity (ssg) of 2.19 or less and a liquid lubricant into a sheet using a flat die so as to obtain a ptfe sheet; a step b of rolling the ptfe sheet by passing the sheet between a pair of rolls in a longitudinal direction of the sheet; a step c of stretching the rolled ptfe sheet in a transverse direction of the sheet; a step d of removing the liquid lubricant from the ptfe sheet; and a step e of stretching the ptfe sheet, from which the liquid lubricant has been removed, both in the longitudinal direction of the sheet and in the transverse direction of the sheet, for example, at an area stretch ratio of 150 to 700, so as to make the sheet porous. According to this production method, it is possible to increase the pf value of the porous ptfe membrane..
Infection control bedding product
An infection control bedding product such as a pillow, duvet, mattress, cushion or such like having a sealed cover and having a deformable filling material, may comprise a liquid impermeable air permeable microbial barrier vent. The vent includes an oleophobic expanded polytetrafluoroethylene (ptfe) membrane extending past the perimeter of the aperture and a nonwoven layer extending past the perimeter of the aperture.
Foaming agents and compositions containing fluorine substituted olefins, and methods of foaming
Various uses of fluoroalkenes, including tetrafluoropropenes, and monchlorotrifluoropropenes in a variety of applications, including as blowing agents are disclosed.. .
Electrolytic solution for nonaqueous electrolytic solution cell, and nonaqueous electrolytic solution cell
Disclosed is an electrolyte for nonaqueous electrolyte cells, which contains a nonaqueous organic solvent and a solute. This electrolyte is characterized by containing as additives at least one compound selected from a first compound group consisting of bis(oxalato)borate, difluoro(oxalato)borate, tris(oxalato)phosphate, difluorobis(oxalato)phosphate, and tetrafluoro(oxalato)phosphate, and at least one compound selected from a second compound group consisting of a sulfonate group-containing imide salt, which is represented by the general formula m[r1oso2nso2or2]n, and a phosphoryl group-containing imide salt, which is represented by the general formula m[r3r4opnpor5r6]m.
Compositions comprising 1,1,1,2,2-pentafluoropropane and a fluoroolefin and uses thereof
Compositions are disclosed comprising: (a) 1,1,1,2,2-pentafluoropropane; (b) a compound selected from the group consisting of 2,3,3,3-tetrafluoropropene, e-1,3,3,3-tetrafluoropropene, and 1,1,1-trifluoropropene; and optionally (c) a compound selected from the group consisting of 1,1,1,2-tetrafluoroethane and difluoromethane. Such compositions are useful in methods to produce cooling, produce heat, transfer heat, form a foam, produce aerosol products, for recovering heat, and for replacing existing refrigerants.
Resin composition and sliding member using same
Polytetrafluoroethylene is preferred as the fluorine-based resin.. .
Reduced-voc and non-voc blowing agents for making expanded and extruded thermoplastic foams
Process for producing a thermoplastic polymer foam article includes preparing an expandable polymeric formulation comprising a thermoplastic polymer and a blowing agent blend, forming the formulation into an expandable bead, and expanding the expandable bead to form a thermoplastic polymer foam article. The blowing agent blend includes methyl formate, hydrocarbon, and either carbon dioxide or 1,1,1,2-tetrafluoroethane (hfc-134a).
Elastomeric leaflet for prosthetic heart valves
A leaflet for a prosthetic valve formed of at least one layer that includes a composite material containing at least one expanded fluoropolymer membrane having serpentine fibrils and an elastomer is provided. The fluoropolymer may be polytetrafluoroethylene.
Synthesis of 3,3,3-trifluoropropyne
In accordance with the present invention, processes of synthesizing 3,3,3-trifluoropropyne from 1,3,3,3-tetrafluoropropene, 1-chloro-3,3,3-trifluoropropene, and/or 1,1,1,3,3-pentafluoropropane are provided.. .
Synthesis of 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymers
In accordance with the present invention, aqueous emulsion polymerization processes of synthesizing 2,3,3,3-tetrafluoropropene/vinylidene fluoride copolymers having 2,3,3,3-tetrafluoropropene as the major monomer unit are provided.. .
Composite ptfe plating
The present invention is directed to compositions, baths, and methods for composite plating including polytetrafluoroethylene (ptfe), and more particularly, to compositions, baths, and methods of composite plating with ptfe in a metal or alloy matrix where the materials used in the process contain no or essentially no pfos (perfluorooctane sulfonate) and/or no pfoa (perfluorooctanoic acid).. .
Noise dampening energy efficient tape and gasket material
A noise dampening tape and gasket material for reducing or preventing unwanted electromagnetic interference from escaping or entering an enclosure. The noise dampening gasket includes an inner core section, a carbon material layer surrounding the inner core section, an insulating layer surrounding the carbon material layer, and a metal shield layer surrounding the insulating layer.
Method for controlling and/or preventing a fire in a vehicle air-conditioning system
A method for controlling and/or preventing a fire in a vehicle air-conditioning system which contains 2,3,3,3-tetrafluoro-1-propene as a coolant includes bringing the components of the air-conditioning system containing the coolant into contact with an extinguishing agent which contains an aqueous solution or suspension of a compound containing calcium and a gelling extinguishing agent additive.. .
Medical balloon devices and methods
A balloon or balloon cover comprising a composite material having a least one expanded fluoropolymer material and an elastomer is provided. The expanded fluoropolymer material can contain serpentine fibrils.
Fluoroalkyl iodide and its production process
A process for producing a fluoroalkyl iodide as a telomer rf(cf2cf2)ni (wherein rf is a c1-10 fluoroalkyl group, and n is an integer of from 1 to 6) by telomerization from a fluoroalkyl iodide represented by the formula rfi (wherein rf is as defined above) as a telogen and tetrafluoroethylene (cf2cf2) as a taxogen, which comprises a liquid phase telomerization step of supplying a homogeneous liquid mixture of the telogen and the taxogen from the lower portion of a tubular reactor, moving the mixture from the lower portion towards the upper portion of the reactor in the presence of a radical initiator over a retention time of at least 5 minutes while the reaction system is kept in a liquid phase state under conditions where no gas-liquid separation will take place, so that the taxogen supplied to the reactor is substantially consumed by the reaction in the reactor, and drawing the reaction product from the upper portion of the reactor.. .
Methods for removing potassium, rubidium, and cesium, selectively or in combination, from brines and resulting compositions thereof
The invention generally relates to methods of removing potassium, rubidium, and/or cesium, selectively or in combination, from brines using tetrafluoroborates. Also disclosed are methods of producing potassium, rubidium, and/or cesium chlorides using ionic liquids and exchange media.
Sliding bearing having self-lubricating liner
A sliding bearing having a metallic outer ring and a self-lubricating liner formed on the inner circumferential surface of the outer ring. The self-lubricating liner has a self-lubricating resin composition consisting of a mixture of 60 to 80% by weight of polyetherketone-based resin, 10 to 30% by weight of polytetrafluoroethylene, 5 to 15% by weight of carbon fiber, and not more than 15% by weight of aramid fiber, a total amount of the carbon fiber and the aramid fiber being 10 to 25% by weight.
Filter medium for air filter, air filter unit, and method for producing filter medium for air filter
A filter medium for an air filter unit for collecting dust from an airflow includes a pre-collection layer, a principal collection layer and an air-permeable cover layer. The pre-collection layer collects a part of the dust in the air flow.

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Tetrafluoro topics: Tetrafluoro, Tetrafluoroethylene, Polytetrafluoroethylene, Hydrochloric Acid, Sulfuric Acid, Boric Acid, Phosphoric Acid, Carbon Nanotube, Hydrophobic Coating, Superhydrophobic Coating, Gel Formulation, Chloric Acid, Tetrafluoroboric Acid, Polyglycerol, Ultracapacitors

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