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WO/2002/088207A1 |
Emulsifier free fluoropolymer manufacturing method in which (a) a chain transfer agent, or a mixture of chain transfer agents are used wherein the chain transfer agents do not yield more than 0.4 weight % relative to the monomer feed of ...
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WO/2002/088203A2 |
The present invention provides a method of making a fluoropolymer comprising repeating units derived from one or more gaseous fluorinated monomers. The method comprises an aqueous emulsion polymerization of gaseous fluorinated monomers i...
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WO/2002/088248A1 |
Curable fluoroelastomer compositions having improved compression set after curing are provided, as well as compositions that are of relatively high purity. These compositions include a hydrogen-containing fluoroelastomer having interpoly...
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WO/2002/083744A1 |
A process for producing a tetrafluoroethylene polymer which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a water-soluble polymerization initiator, wherein the water used in the polymerization has bee...
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WO/2002/083756A1 |
A composition of (a) a fluoropolymer having interpolymerized units derived from a nitrogen-containing cure site monomer; and (b) a nonfluorinated catalyst composition that includes a compound having the general formula: {RA}?(-)¿{QR'¿k...
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WO/2002/079280A1 |
Fluororesin particles which have a melting point of 230 to 300°C, cannot be melt-proceeded, and have an average particle diameter of 100 nm or smaller and a melt flow rate, as measured in accordance with ASTM D3307 at 327°C under a loa...
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WO/2002/079279A1 |
The invention concerns a method for polymerisation in aqueous suspension of vinyl chloride alone or mixed with another vinyl monomer, wherein the initiator comprises at least a compound selected among dialkyl peroxydicarbonates, peroxy-t...
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WO/2002/079324A1 |
A vinyl chloride-based paste sol composition which is sufficiently thixotropic without the need of containing a large amount of a thixotropic agent or solvent, which poses problems concerning productivity, cost, product quality, burden t...
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WO/2002/077043A1 |
A process for the preparation of polyvinyl chloride (PVC) with controlled molecular weight and molecular weight distribution is disclosed. The polymerization reaction can be initiated by various organic halide initiators in conjunction w...
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WO/2002/077046A2 |
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 surfactant. At least part of the fluorinated surfa...
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WO/2002/072653A2 |
An aqueous dispersion of non-melt-processible fluoropolymer, process for making same and concentrated dispersion and powder obtained from the dispersion. The fluoropolymer particles of the dispersion have a standard specific gravity (SSG...
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WO/2002/072646A1 |
A process for producing a tetrafluoroethylene polymer which comprises polymerizing tetrafluoroethylene having a content of impurities (e.g., saturated compounds such as CH¨2?F¨2? and CHF¨3? and unsaturated compounds such as CF¨2?=CFH...
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WO/2002/066521A1 |
A fluorochemical composition comprising a major amount of organic solvent and 0.05% by weight to 5% by weight of fluorochemical oligomer dispersed or dissolved in said organic solvent and said fluorochemical oligomer being represented by...
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WO/2002/062854A1 |
A process for producing a vinyl chloride polymer which comprises polymerizing, in an aqueous medium, a vinyl chloride monomer or a mixture of a vinyl chloride monomer with one or more monomers copolymerizable therewith, wherein an alkali...
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WO/2002/062742A1 |
Fluorinated carboxylic acid, used as a surfactant in fluoropolymerization in aqueous media, can be recovered by scrubbing from the exhaust gas of the dryer during polymer drying and, after concentration and treatment with alumina, direct...
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WO/2002/060968A1 |
A method of making a curable fluoroelastomer is disclosed. The method comprises the steps of preemulsifying at least one perfluorovinylether in water, and copolymerizing the preemulsified perfluorovinylether with a gaseous fluorinated mo...
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WO/2002/055567A2 |
The invention concerns a method for continuous preparation of halogenated polymers comprising free radical polymerisation of halogenated monomers in a medium comprising liquid or supercritical carbon dioxide, in at least two pressurised ...
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WO/2002/050140A2 |
The invention concerns a method for preparing latex by batch free radical polymerisation of one or several monomers, which consists in polymerising: (a) one or several fine dispersions of one or several finely dispersed monomers and (b) ...
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WO/2002/048201A2 |
The present invention provides fluoropolymer powders having a diameter of from about 0.05 to about 200 microns, said powders having pendant hydrophilic groups and olefinic unsaturation. The powders are useful in applications which requir...
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WO/2002/044226A1 |
Use of non-water-soluble organic fluorinated compounds, which are gaseous under the polymerization conditions and act as chain transfer agent in the gas phase, as explosion suppressors in the emulsion polymerization of tetrafluoroethylene.
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WO/2002/038632A1 |
The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40 °C and 95 °C, at a pressure between 5 and 30 bar in the presence of a stable free ...
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WO/2002/028925A2 |
A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a hydrocarbon sulfonate anionic surfactant of the formula CH¿3?-(CH¿2?)¿n?-SO¿3?M, CH¿3?-(CH¿2?)¿n?-C¿6?H¿4?-SO¿3?M, or CH¿3?-...
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WO/2002/024770A1 |
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, where n is an integer from 2 to 9, or...
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WO/2002/013953A1 |
A method of more efficiently recovering a fluorochemical surfactant from an aqueous solution containing the surfactant. The method of recovering a fluorochemical surfactant comprises subjecting an aqueous solution containing the surfacta...
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WO/2002/012392A1 |
A tetrafluoroethylene based resin molding material excellent in high frequency electric characteristics which provides a formed product having a relative dielectric constant of 2.2 or less and a dielectric loss tangent of 1.60 x 10?-4¿ ...
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WO/2002/006355A2 |
To introduce polar group by a simple and easy method without spoiling solvent-resistance and mechanical/thermal properties which fluorine type resin inherently possess to provide a fluorine type resin composition improved in adhesion. To...
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WO/2001/096946A2 |
Blocked photographically useful groups decompose thermally via a Lossen rearrangement reaction, including, for example, compounds represented by the following structure: F. In the above structure, the substituents are as defined in the a...
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WO/2001/092356A2 |
A tetrafluoroethylene (TFE)/perfluoro (alkyl vinyl ether) (PVE) copolymer and a method for producing the copolymer, wherein the molar ratio of polymerized units based on TFE/polymerized units based on PVE is in the range of from 98.1/1.9...
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WO/2001/090206A2 |
A method for forming a fluoropolymer comprises providing a reaction mixture comprising carbon dioxide, at least one fluoromonomer, and an initiator; and reacting the at least one fluoromonomer in the reaction mixture to form a fluoropoly...
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WO/2001/078171A1 |
Use of a conventional binder containing a surfactant has been undesirable in that the surfactant remains in the resultant electrode coating film and the residual surfactant leads to an increase in internal resistance, deterioration of cy...
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WO/2001/068154A1 |
An air freshener dispenser is taught having plug-through capability as well as a night light. The dispenser is a plug-in diffuser for such active materials as fragrances and air fresheners, and eliminates the consumer problem of loss of ...
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WO/2001/064308A1 |
The invention concerns a method and an installation for extracting a monomer from an aqueous polymer slurry which consists in: after heating the slurry, causing it to expand in an expansion chamber, then introducing it into a vertical co...
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WO/2001/060869A1 |
Fluoroelastomers having copolymerized units of vinylidene fluoride major monomer, at least one other fluorinated major monomer, and at least one cure site monomer are prepared in an aqueous suspension polymerization process using an init...
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WO/2001/060911A1 |
Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.
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WO/2001/058577A1 |
A crosslinked fluorocarbon such as perfluorocarbon, polymeric composition is provided having hydrophilic functional groups, which is crosslinked with fluorinated such as perfluorinated crosslinking groups. Also provided is a branched flu...
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WO/2001/057095A1 |
Linear copolymers of fluorocarbon and hydrocarbon monomers. The present invention provides linear copolymers and terpolymers of fluorocarbon and hydrocarbon monomers, and particularly the invention provides a linear copolymers, of fluoro...
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WO/2001/057100A1 |
High purity fluoropolymers are obtained by the emulsion polymerization process, removing essentially all ions and coagulating the polymer essentially without adding ions. These polymers are useful in the field of electronic devices.
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WO/2001/049752A2 |
Emulsion polymerization of liquid fluorinated monomers which have a boiling point above 50° C and low water-solubility is markedly more efficient if the monomer is pre-emulsified with a nontelogenic fluorinated emulsifier in water.
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WO/2001/049757A1 |
The invention concerns the synthesis of novel fluorinated elastomers having very low glass transition temperatures (T¿g?), good resistance to bases, oil and fuels and suitable properties in use. Said elastomers contain, for example, 80 ...
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WO/2001/046275A1 |
This invention concerns a process for the use of hydrogen halides as chain transfer agents in fluoroolefin polymerization.
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WO/2001/038406A1 |
Disclosed is a method of eliminating the odour from a malodourous gas, where the odour is due to the presence of a C¿10? to C¿18? fatty acid in the gas. An aqueous solution containing at least a stoichiometric amount of a base that rea...
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WO/2001/037044A1 |
Disclosed are partially fluorinated and fully fluorinated polymers that are substantially transparent to ultraviolet radiation at wavelengths from 140 to 186 nanometers.
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WO/2001/037043A1 |
Disclosed are partially fluorinated and fully fluorinated polymers that are substantially transparent to ultraviolet radiation at wavelengths from 187 to 260 nanometers.
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WO/2001/034667A1 |
A method for carrying out the continuous polymerization of a monomer in a carbon dioxide reaction medium comprises the steps of: (a) providing an apparatus including a continuous reaction vessel and a separator; (b) carrying out a polyme...
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WO/2001/034666A1 |
A vulcanizable fluoroelastomer composition from which a vulcanizate reduced in compression set can be produced in a short time and which is excellent in molding stability and suitability for kneading. It comprises a fluoroelastomer havin...
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WO/2001/027167A1 |
A crosslinked fluorocarbon such as perfluorocarbon, polymeric composition is provided having hydrophilic functional groups, which is crosslinked with fluorinated such as perfluorinated crosslinking groups. Also provided is a branched flu...
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WO/2001/016100A1 |
Diacyl peroxides having the structure (I): R¿1? CXX'(CYY')¿e?CF¿2?(C=O)OO(C=O)CF¿2?CWW'(CZZ')¿e?R¿f?, wherein e and e' are independently 0 or 1; and when e=0, at least one of X, X' is H and any of the other X, X' is H or F; when e'...
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WO/2001/012682A1 |
A molding powder of a modified polytetrafluoroethylene resin containing 0.01 to 1 wt.% perfluorovinyl ether units, characterized in that (a) the amount of perfluorovinyl ether monomer remaining in the resin is up to 50 ppb, (b) the conte...
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WO/2001/005881A1 |
A polymer having a structure represented by general formula: (I) (wherein X, Y, and Z each is hydrogen, fluorine, chlorine, bromine, or iodine, provided that at least one of X, Y, and Z is fluorine; R is linear or branched fluoroalkylene...
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WO/2001/006587A1 |
A solid polymer electrolyte type fuel cell having, as an electrolyte, a cation exchange film comprising a perfluorocarbon polymer having a sulfonic acid groupe, characterized in that the cation exchange film has been subjected to a stret...
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