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Matches 851 - 900 out of 6,145

Document Document Title
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...  
WO/1995/030697A1
A method of radically (co)polymerizing vinyl ester, vinyl halide, diene, acrylonitrile and 'alpha'-olefin monomers, optionally with one or more ethylenically unsaturated monomers, with a polymerization initiator in the presence of an amo...  
WO/1995/029943A1
A process for suspension polymerization of tetrafluoroethylene to polytetrafluoroethylene is characterized by starting reaction at low temperature and increasing temperature to higher temperature during the reaction.  
WO/1995/014047A1
Polytetrafluoroethylene coagulate obtained from aqueous dispersion polymerization of tetrafluoroethylene in the presence of volatile initiator, surfactant, and possibly wax, is purified of these contaminants by exposing the coagulate to ...  
WO/1995/008580A1
A process for producing a low-molecular-weight polytetrafluoroethylene (PTFE) having a melting point in the range of 250 to 325 �C, which comprises polymerizing tetrafluoroethylene in a solvent selected from the group consisting of hyd...  
WO/1995/008598A1
An aqueous dispersion of a vinylidene fluoride (VdF) polymer which comprises a VdF polymer having a particle diameter of 200 nm or less and has a solids concentration of 30 - 50 wt. % and wherein the content of a fluorinated surfactant i...  
WO/1995/008581A1
Polymeric compositions are derived from copolymers of 'alpha','beta','beta'-trifluorostyrene with a variety of substituted 'alpha','beta','beta'-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion...  
WO/1995/006073A1
Novel polytetrafluoroethylene structures are described, which were prepared by polymerizing liquid tetrafluoroethylene in aqueous dispersion. The novel structures include continuous three-dimensional networks of fibrils and bundles of fi...  
WO/1995/006072A1
Novel polytetrafluoroethylene structures are described, which were prepared by polymerizing liquid tetrafluoroethylene in aqueous dispersion. The novel structures include continuous three-dimensional networks of fibrils and bundles of fi...  
WO/1995/005406A1
The invention provides a process for polymerizing at least one fluoromonomer in the presence of a cyclic perfluorinated amine. Perfluoro-N-methylmorpholine is a preferred cyclic amine.  
WO/1995/003341A1
A process for the solventless polymerization of brominated styrenes includes blending monomers of brominated styrenes with a polymerization initiator, feeding the monomer/polymerization initiator mix into a prepolymerizer wherein the mon...  
WO/1994/024178A1
Novel polymers are disclosed which can be used to prepare water-based compositions having the capability of forming a uniform, low surface-energy, thin film on a substrate. Such compositions comprise a polymer having at least one fluoroa...  
WO/1994/021696A1
A process for producing a fluoropolymer containing a fluoroolefin unit as the principal constitutional unit, which comprises employing CF3(CF2)nCH2CH3 or CF3(CF2)nH (wherein n is an integer from 1 to 8) as a polymerization medium and CF2...  
WO/1994/021697A1
Fluoroalkyl sulfinates were synthesized and used as a source of fluoroalkyl radicals in aqueous emulsion polymerization. The resulting polymers contained a high level of perfluoroalkyl end groups. When fluoroalkyl disulfinates were utili...  
WO/1994/018248A1
A novel process for the free radical polymerization of fluoromonomers in which perfluoroalkyl sulfide solvents are used is disclosed. The solvents have little effect on atmospheric temperature and ozone concentrations. The polymers produ...  
WO/1994/017109A1
A process for producing a fluoro(co)polymer by (co)polymerizing a fluoro-olefin which aims at using a substance that can substitute for R-113 or R-114 conventionally used as the solvent, solving the problem of coloration of the formed fl...  
WO/1994/015258A1
A polymer has at least one photoactive site and more than one perfluorocyclobutane group. New monomers containing photoactive sites or photoactive precursors and at least one perfluorovinyl group are useful for making such polymers. Proc...  
WO/1994/014738A1
Described are monomers of the formula (I) (e.g. 3,3,4,4,5,5,6,6-octafluoromethylenecyclopentane) plus copolymers prepared from such monomers and from one or more monomers copolymerizable with them. Such compounds are suitable for use in ...  
WO/1994/014741A1
Disclosed herein are novel monomers of the formula CF2 = CF(CF2)nCH2OCF = CF2, wherein n is 1,2 or 3, and novel intermediates of the formula CF2C1CFCl(CF2)nCH2OCF = CF2 wherein n is 1, 2 or 3. Also disclosed is a fluoro-polymer containin...  
WO/1994/014203A1
The invention concerns electrode membranes made of an ion-exchange material which forms the core and electrodes which contact each side thereof. The membranes are intended for use in fuel cells or electrolysers, the ion-exchange material...  
WO/1994/007929A1
An improved process for the polymerization of fluoromonomers to fluoropolymers which comprises using as a chain transfer agent the compound Y(CF2)mCH2CH2I, wherein m is 3 to 12, and Y is F or -CH2CH2I.  
WO/1994/007274A1
An ion exchange membrane or ion exchange membrane/electrode assembly having increased efficiency in proton exchange processes as the result of membrane hydration processing comprising heating a hermetically sealed membrane or membrane/el...  
WO/1994/005706A2
A process for purifying fluoropolymers by contacting them at temperatures above 140 �C with a liquid perfluorinated cycloalkane. The resulting polymers are particularly useful where polymers with reduced impurities are desirable, such ...  
WO/1994/005708A1
In the aqueous polymerization of vinyl fluoride, the use of perfluoroalkylpropylamine salts as emulsifiers permits high yields and excellent polymer color.  
WO/1994/003503A2
A fluoroorganic polymeric material which comprises a polymeric chain and at least one group pendent from the polymeric chain, in which the group pendent from the polymeric chain comprises at least one ion-exchange group or group converti...  
WO/1994/000511A1
This invention relates to porous polyfluoroethylene (PTFE), shaped articles prepared therefrom, and to methods of preparing said articles.  
WO/1993/024538A1
A fluoroelastomer composition free of metal or metal containing compounds, such as metal, metal alloys, metal salts or metal oxide suitable for the upper layer of a fuser roll which does not require the use of mercapto functional active ...  
WO/1993/022352A1
A process is disclosed for the concentration of aqueous fluoropolymer dispersion. Polyacrylic acid (or its salts) or an acrylic polymer of high acid content (or its salts) of average molecular weight between 50,000 and 500,000 is used as...  
WO/1993/021239A1
Group IV organometallic compounds, e.g. alkylsilane, or alkylsiloxane compounds, are used as chain transfer agent in the radical initiated polymerization of ethylenically unsaturated monomers, to give polymers comprising non-ionic end gr...  
WO/1993/020116A1
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 the fluoropolymer. A preferred solvent...  
WO/1993/017053A1
A novel process for the free radical polymerization of fluoromonomers in which selected hydrofluorocarbon solvents are used. The solvents have little effect on atmospheric temperature and ozone concentrations. The polymers produced are u...  
WO/1993/013145A1
The invention relates to a homo- or copolymer composition of a vinyl chloride, which is ready for processing and which contains additives necessary from the point of view of the processing, such as stabilizers, lubricants, colourants, re...  
WO/1993/013144A1
The invention relates to a homo- or copolymer of vinyl chloride. The polymer contains 0.01 - 50 % of an oligomer of a C4-C20alpha-olefin or of an internal olefin or of their mixtures.  
WO/1993/010160A1
The invention concerns fluoropolymers with enhanced heat stability and improved resistance to deformation when hot. The fluoropolymers are made from fluoroethylenes, using as comonomers perfluoro cylcoalkyl vinyl ethers and, optionally, ...  
WO/1992/017635A1
Fluorochemical compositions comprising fluorinated compounds, wherein the fluorinated compound comprises fluorochemical oligomeric portion, an organic moiety, and a group that can impart soft hand, stain release, water repellency, or a d...  
WO/1992/011295A1
A radiation reactive functionalized polymer comprising an isoolefin having about 4 to about 7 carbon atoms and a para-alkylstyrene, wherein a radiation reactive functional group is attached to the para-alkyl group of the para-alkylstyren...  
WO/1991/018930A1
Perfluoroelastomers cured by radiation and characterized by an absence of curing agent residues in the cured product. The elastomers are terpolymers derived from tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether with alkyl of 1 ...  
WO/1991/018028A1
Polyvinyl halide resin absent allylic halide is disclosed. Another polyvinyl halide resin absent allylic halide, allylic branching and unsaturation is also disclosed. The compositions of this invention are prepared by contacting any poly...  
WO/1991/009884A1
A method for functionalizing chlorinated (co)polymers, wherein said chlorinated (co)polymer is reacted at a temperature of between 50 and 250 �C with an organometallic derivative of formula (I), wherein M is Sn, Pb, Sb, or Bi; A is NR3...  
WO/1991/009879A1
An improved process for the homo- and copolymerization of vinyl chloride, wherein the inner wall of a polymeriser and those parts of the apparatus which come into contact with the monomer during polymerization are coated with a special c...  
WO/1991/009025A2
Partially fluorinated compounds of specified formulas that are useful as chemical intermediates and monomers are disclosed. Partially fluorinated polymers prepared from one of these compounds are also disclosed. Fluoro-2,2-dimethyldioxol...  
WO/1991/006576A1
Polyvinyl chloride reactor wall scale is reduced by conducting the polymerization in the presence of a phenothiazine dimer or higher oligomer made by reacting an aldehyde such as acetaldehyde or benzaldehyde with phenothiazine, or by rea...  
WO/1991/006584A1
A fluorocopolymer composed of 40 to 60 mole % of fluorolefin units, 25 to 55 mole % of vinyl ester or ether units and 5 to 25 mole % of hydroxylated vinyl ether units, wherein the intrinsic viscosity as measured in an uncured state in te...  
WO/1990/015828A1
A thermoplastic fluoropolymer which has improved tensile strength, yield strength, and cut- through resistance at elevated temperature. In a preferred embodiment, the fluoropolymer is an ionomer which comprises at least 40 mole percent p...  
WO/1990/014366A1
Perfluoropolymers prepared from tetrafluoroethylene, perfluro (alkyl vinyl) ether and cyano-cure site monomer, and further comprising iodo moieties, and cured elastomers prepared from the perfluoropolymers.  
WO/1989/012240A1
Melt-processible copolymers of at least two halogenated comonomers from a defined class, especially perhalogenated comonomers, and particularly perfluorinated comonomers, of improved thermal stability are obtained by first contacting the...  
WO/1989/012071A1
Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole with at least one fluoro comonomer selected from one or more of ten defined classes having a recited minimum mole proportion of perfluoro-2,2-dimethyl-1,3-dioxole, in no event le...  
WO/1989/011495A1
Thermally and hydrolytically stable fluorocopolymers, especially melt-processible fluorocopolymers, for example, tetrafluoroethylene/hexafluoropropylene copolymers, having -COOH and/or -COF groups on the polymer chains are contacted and ...  
WO/1989/008024A1
The invention is a composite comprising a first substrate (200) having a first reacting group, and a functional fluoropolymer (100) having pendant groups which terminate with a second reacting group; wherein at least a portion of the fir...  
WO/1989/004847A1
The present invention is directed to a copolymer of a fluoromonomer having the formula R1R2C=CR3F wherein R1, R2 and R3 are selected from H and F, and wherein when R1 and R2 are F, R3 is selected from H, F and Cl; and a vinyl monomer hav...  

Matches 851 - 900 out of 6,145