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Patent Searching and Data


Matches 651 - 700 out of 8,487

Document Document Title
WO/1998/034967A1
A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a fluoropolymer. A preferred solvent f...  
WO/1998/029460A1
A method and an apparatus for removing residual monomers from a slurry containing polyvinyl chloride while preventing degradation of polyvinyl chloride and the drop of its quality. The apparatus comprises a cylindrical column main body (...  
WO/1998/029505A1
A polymer composition which comprises: (A) a reaction product obtained by reacting (a) a hydroxylated fluoropolymer obtained by the copolymerization of a fluoroolefin, a hydroxylated vinyl monomer, and other unsaturated monomer(s) copoly...  
WO/1998/028351A1
Fluoromonomer is polymerized to obtain a fluoropolymer with the polymerization being carried out in a pressurized polymerization reactor containing a polymerization medium comprising liquid or supercritical CO�2?. The polymerization me...  
WO/1998/024820A1
The invention relates to build-up agents which comprise a condensation product among an aldehyde, a phenol compound and an aromatic carboxylic acid, hydroxy-substituted on the aromatic nucleus. The products are particularly effective in ...  
WO/1998/023649A1
A method for polymerizing vinyl monomers in the aqueous phase. In order to avoid deposits from being formed on the surfaces of the reactor, polymerization occurs in the presence of at least one N-oxyl compound of a secondary amine carryi...  
WO/1998/020055A1
This invention provides a method of preparing fluoropolymer utilizing one or more environmentally-friendly fluorinated emulsifiers comprising $g(a)-branched fluoroalkylcarbonyl moieties. Fluoropolymer emulsions comprising one or more env...  
WO/1998/018835A1
A process to make suspensions of thermally labile organic compounds in water is provided. The suspensions comprise at least one polyvinyl alcohol with an average degree of hydrolysis from 60 to 80 % and at least one non-ionic surfactant ...  
WO/1998/014484A1
A process for the polymerization which comprises polymerizing batchwise at least one gaseous or super-critical fluorinated olefin monomer or a monomer mixture of the olefin monomer with other monomer copolymerizable with the olefin monom...  
WO/1998/012248A1
Stable foam caulk, sealant and insulation compositions are disclosed. The compositions comprise solid, waxy non-ionic lipophilic surfactants having low HLB values. These surfactants, upon foamed dispensing of the composition, provide sta...  
WO/1998/008879A1
A multi-layer article comprising a substrate and a dehydrofluorinated fluoropolymer, wherein the dehydrofluorinated polymer contains substantially no grafted adhesion-promoting groups, and the dehydrofluorinated fluoropolymer contains su...  
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...  
WO1997022636A3  
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...  
WO1997019982A3  
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...  
WO1996010605A3  
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...  

Matches 651 - 700 out of 8,487