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Matches 801 - 850 out of 6,144

Document Document Title
WO/1998/008880A1
A method of dehydrofluorinating a fluoropolymer comprising the steps of: providing a fluoropolymer emulsion comprising water, a fluoropolymer, and substantially no organic solvent; adding to the fluoropolymer emulsion a basic compound, t...  
WO/1998/006761A1
Novel metallohalopolymers comprising an oxyhalopolymer and a transition metal covalently bonded to an oxygen site on the oxyhalopolymer possess desirable properties of inertness, stability, hydrophobicity and high electronegativity like ...  
WO/1998/003561A1
The object of this invention is to provide the method for concentrating aqueous PTFE emulsion in the shortest time compared to conventional methods and its apparatus, which waste water is not produced, the formation of flocculative mater...  
WO/1997/046598A1
Novel polymeric compounds having pendent fluoroaliphatic groups, pendent organic-solubilizing groups, and pendent groups capable of reacting with an epoxy silane; which have been reacted with an epoxy silane have been discovered. These c...  
WO/1997/045464A1
Selected partially fluorinated 'alpha','omega'-dienes bearing -CF3 substitution can be free radically (co)polymerized to form polymers in which cyclic structures are present. The polymers are useful for films, coating and molded parts.  
WO/1997/040076A1
The present invention concerns a procedure for the production of PVC particles with a narrow size distribution in the range 10-50 'mu'm, preferably 10-30 'mu'm, in which, in a first stage, a vinyl monomer or a mixture of monomers is poly...  
WO/1997/036940A1
A method of recovering low-boiling substances by spraying a polymer latex containing low-boiling substances from a nozzle at an upper part of a vaporization drum and vaporizing the low-boiling substances, wherein the polymer latex is spr...  
WO/1997/035892A1
A dispersible ionic catalyst activator, comprising an insoluble substrate material having a correlated settling rate less than 0.03 cm/sec, and from 0.001 to 10 mmol/g of an ionic catalyst activator deposited thereon which is particularl...  
WO/1997/031589A1
A process is provided for producing an additive-containing PTFE or other fluorocarbon polymer resin which achieves substantially complete and thorough homogeneous distribution of the selected additive within the polymer matrix. The selec...  
WO/1997/027229A1
The peroxydicarbonates of dialkyl with short alkyl chains, preferably of diethyl and diisopropyl, are implemented for the polymerisation in aqueous suspension of vinyl chloride in the form of a solution in a water insoluble liquid dialky...  
WO/1997/025369A1
A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of 'alpha','beta','beta'-trifluorostyrene, substituted 'alpha','beta','beta'-trifluorostyrene and et...  
WO/1997/022636A2
Iodoperfluoroalkylnitriles are useful as chain transfer agents in the free radical polymerization of vinyl monomers to form perfluoropolymers. These nitriles provide end groups which may take part in a cross-linking reaction, if desired,...  
WO/1997/020863A1
An emulsion polymerization method which comprises emulsion-polymerizing tetrafluoroethylene in the presence of a polymerization initiator, a paraffin wax having a content of reducible substances of 100 ppm or lower, and an emulsifying ag...  
WO/1997/020238A1
The present invention is an improved material and method for use for providing diffuse transflectance of light. By employing an expanded polytetrafluoroethylene (PTFE) comprising a microstructure of polymeric nodes and fibrils, the mater...  
WO/1997/019982A2
Fast-curing perfluoroelastomer compositions are provided which comprise a perfluoroelastomer having a plurality of nitrile groups and a plurality of carboxyl-containing groups, carboxylate-containing groups, carboxamide groups, or mixtur...  
WO/1997/017381A1
The present invention provides a novel, optionally surfactant-free process for controlling particle number, particle size, and/or particle size distribution. The method of the invention also significantly improves monomer to polymer conv...  
WO/1997/017382A1
A fine polytetrafluoroethylene powder excellent in fluidity in a powdery state, which is composed of fine particles (primary particles) having a mean particle diameter of 0.05 to 1 'mu'm and has an apparent density of 0.52 to 0.70 g/ml, ...  
WO/1997/013792A1
This invention relates to a process for the production of lower molecular weight polymers by free radical-initiated polymerization of unsaturated species characterised by the use of an unsaturated compound of Formula (I) as a chain trans...  
WO/1997/008212A1
A process for the aqueous suspension polymerization of vinyl chloride or a mixture of vinyl chloride and other vinylic monomers(s) to produce a porous resin, having the step of polymerizing vinyl chloride or said mixture at a polymerizat...  
WO/1997/008214A1
A compound of the formula C6F12-CH2CH2-SO3M, wherein M is a cation having a valence of 1 is used as a dispersing agent in the aqueous dispersion polymerization of perfluorinated copolymerizable monomer.  
WO/1997/003141A1
Coatings based on non-melt-fabricable tetrafluoroethylene polymers with melt viscosity in the range 1x107 to 3x109 Pa.s have good performance without the necessity of blending with other fluoropolymers in the prime coat.  
WO/1997/002300A1
Disclosed herein is a process in which fluorine containing olefins are polymerized using an initiation system which is a combination of a fluoroaliphatic sulfinate or sulfinic acid and chlorate, bromate or hypochlorite ions. The resultin...  
WO/1996/039379A1
Sulfonyl fluoride substituted 'alpha','beta','beta'-trifluorostyrene monomers are disclosed. The monomers are incorporated into polymeric compositions which are conveniently hydrolyzed to produce polymeric compositions which include ion-...  
WO/1996/039446A1
Procedure for the polymerization of monomers in aqueous suspension and/or emulsion carried out in reactors inside of which an anti-scaling product is deposited, characterized in that, the said anti-scaling product comes from the cross-li...  
WO/1996/038488A1
A network polymer that contains: (a) a plurality of polymer chains which are derived from one or more ethylenically-unsaturated monomer(s); and (b) at least one linking group which links the polymer chains and which contains anhydride, c...  
WO/1996/034022A1
The invention relates to fluorotelomers, their synthesis by free radical-initiated telomerization of fluoroalkenes (e.g. TFE) in which hydrochlorofluorocarbons (HCFC's) are used both as telogens and as solvents, and dispersions of the fl...  
WO/1996/030417A1
The present invention provides a multi-phase polymerization process for making a water insoluble polymer. The process includes (1) providing a mixture comprising carbon dioxide and an aqueous phase, and containing a monomer and a polymer...  
WO/1996/028477A1
The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer cha...  
WO/1996/024622A1
Process for the production of fluoropolymers and/or copolymer resins thereof by the use of an aqueous dispersion system incorporating a redox initiator system which comprises t-butyl hydroperoxide and sodium metabisulfite to initiate the...  
WO/1996/022315A1
An aqueous microemulsion polymerization procedure is described in which very small colloidal melt-processible fluoropolymer particles are produced from at least one gaseous monomer and optionally TFE. The polymerization procedure involve...  
WO/1996/022312A1
Polytetrafluoroethylene (PTFE) structures are described which are prepared by polymerizing liquid tetrafluoroethylene in an aqueous microemulsion region to obtain small particles of PTFE.  
WO/1996/022313A1
An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves forming a microemulsion of at least one l...  
WO/1996/018659A1
Method for Polyvinylchloride production in aqueous suspension with recovery of refluxes, that provides for the use of a plant for Polyvinylchloride production that has at least one reactor to transform the vinyl chloride monomer into Pol...  
WO/1996/017875A1
The invention concerns a process for the radical polymerisation of ethylenically unsaturated monomers in an aqueous medium, characterised by the fact that: (a) the starting solution used for the polymerisation and the educts required for...  
WO/1996/017877A1
A fluororubber copolymer produced by free-radical polymerization in the presence of a diiodinated compound, containing 0.005-1.5 mol % iodine-containing fluorinated vinyl ether units, 40-90 mol % vinylidene fluoride units, 3-35 mol % per...  
WO/1996/015157A1
Process for the synthesis of block polymers, homopolymers and copolymers of narrow polydispersity having formula (1) by contacting selected vinyl monomer(s), vinyl-terminated compound(s) and free radicals in which effective control of pr...  
WO/1996/014357A1
A process is provided for preparing an acrylic copolymer latex having improved mechanical and shear stability comprising emulsion polymerizing at least one ethylenically unsaturated monomer having up to 23 carbons in the presence of, by ...  
WO/1996/012773A1
An aqueous fluoropolymer dispersion comprising 100 parts by weight (in terms of solid content) of an aqueous fluoropolymer dispersion and 1-20 parts by weight (in terms of solid content) of an organosilicon compound and useful as a coati...  
WO/1996/010605A2
Disclosed herein are polymers made by free radically polymerizing the novel compound vinyl(perfluorocyclopropane), and optionally other monomers to form copolymers. The repeat unit formed by vinyl(perfluorocyclopropane) contains an olefi...  
WO/1996/010588A1
A process is disclosed for preparing an aqueous polymer dispersion. An aqueous dispersion of a polymer that contains at least one chemically bound, incorporated monomer containing at least one ethylenically unsaturated group, is prepared...  
WO/1996/010047A1
Selected partially fluorinated 'alpha','omega'-dienes can be (co)polymerized to form polymers in which cyclic structures are present. A novel free radical polymerization process, in which the polymer obtained is dependent on the initiato...  
WO/1996/006887A1
An aqueous dispersion of a vinylidene fluoride (VdF) copolymer which is produced by the emulsion polymerization of VdF monomer and a reactive emulsifier, wherein the average particle diameter of the copolymer is as small as 200 nm or les...  
WO/1996/003446A1
A fine powder of a molten high-molecular-weight fluororesin having a melt viscosity of 108-1013 P, an apparent density of 0.4-1.5 g/cc, and a specific surface area of 2 m2/g or less. A molded article produced from this fluororesin, which...  
WO/1996/001851A1
A polymerization process procedures polymers that are insoluble in a reaction mixture that was homogeneous before the polymer began to form. A dispersing agent in the polymerizing system (i.e., the reaction mixture plus the dispersing ag...  
WO/1996/001850A1
A polymerization process produces polymers that are insoluble in a reaction mixture that was homogeneous before the polymer began to form. A dispersing agent in the polymerizing system (i.e., the reaction mixture plus the dispersing agen...  
WO/1996/001853A1
A process for preparing a polymer or copolymer from polymerizable monomers by suspension polymerization whereby foam formation during the removal of residual monomers is inhibited, which process comprises adding at least one salt of an i...  
WO/1995/034583A1
In this invention an aqueous seeded microemulsion polymerization procedure is provided in which colloidal polymer particles are produced from tetrafluoroethylene or tetrafluoroethylene/comonomer or other polymerizable monomers. The parti...  
WO/1995/033782A1
A function-containing fluoroolefin represented by the following general formula: CH2 = CFCF2-Rf6-(CH2)k-X2 (wherein X2 represents -CH2OH, (a) or (b); Rf6 represents C1-C40 fluoroalkyl or -ORf7; Rf7 represents C1-C40 fluoroalkylene or C3-...  
WO/1995/034096A1
Processes for pattering amorphous fluoropolymer TeflonAF, passivating high temperature superconductor films, and improved electronic devices with amorphous fluoropolymer TeflonAF films are disclosed.  
WO/1995/032996A1
This invention relates to carbon based initiators for polymerization and telomerization reactions. Polymers produced are useful as water repellants and materials with high temperature resistance. Telomers are useful as intermediates in t...  

Matches 801 - 850 out of 6,144