Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 551 - 600 out of 8,515

Document Document Title
WO/2003/054039A1
The invention pertains to a process to polymerize one or more monomers wherein one or more initiators and optionally one or more surfactants are added to a polymerization mixture when the pressure in the polymerization reactor is droppin...  
WO/2003/054040A1
The invention pertains to a process wherein initiators having a half-life from 0.0001 hour to 0.05 hour at the polymerization temperature are dosed to a polymerization mixture. The dosing of such initiator allows improved control of the ...  
WO/2003/042252A1
A process for fluoropolymer production which attains high productivity in a relatively low−temperature low−pressure atmosphere, which reduces the cost of commercial−scale production equipment, to thereby overcome the problem. The p...  
WO/2003/042259A1
The invention provides a polyvinylidene fluoride improved in productivity and flow properties without impairing the characteristics inherent in the resin, e.g., heat resistance, weather resistance and chemical resistance, specifically, a...  
WO2003007453A3
This invention concerns a method for forming ionomers by treatment with ammonium carbonate of copolymers having a substantially fluorinated, but not perfluorinated, polyethylene backbone having pendant groups of fluoroalkoxy sulfonyl flu...  
WO2002072653A3
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...  
WO/2003/025042A1
Disclosed herein is a composition comprising an aromatic diamine that is a solid at room temperature and a stabilizing quantity of a hindered amine light stabilizer and its use as a polyurethane curing agent.  
WO/2003/020638A1
The present invention relates to compositions comprising rigid-rod polymers and carbon nanotubes. The compositions comprise dispersed carbon nanotubes aligned with rigid-rod polymers. The alignment of the nanotubes and polymers can be li...  
WO/2003/018078A1
The present invention relates to curable elastomeric compositions based on synthetical or/and natural elastomers, that contains adequate amounts of polymeric hydrogels from the class of polyacrylamides and to technical articles and stapl...  
WO/2003/007453A2
This invention concerns a method for forming ionomers by treatment with ammonium carbonate of copolymers having a substantially fluorinated, but not perfluorinated, polyethylene backbone having pendant groups of fluoroalkoxy sulfonyl flu...  
WO/2003/006557A1
The invention relates to a thermoplastic fluorescent pigment obtained by the condensation of a diisocyanate prepolymer and an aliphatic diamine, a cycloaliphatic diamine or a mixture of a diamine and a polyol in the presence of a fluores...  
WO/2003/002622A1
The present invention provides imide salts as emulsifiers for the polymerization of fluoroolefins.  
WO/2003/002621A1
A living polymerization process for preparation of poly(vinyl chloride) (PVC) with controlled molecular weight and molecular weight distribution is described. The polymerization reaction can be initiated by various polyhalocarbon initiat...  
WO2002088206A3
Emulsifier free fluoropolymer manufacturing method in which (a) a mixture of an oxidizing agent and reducing agent is used to start the polymerization and where one or the other but not both, are further added during polymerization, or (...  
WO/2002/102860A1
Process for preparation of polyvinyl chloride (PVC) comprising the steps of mass: polymerizing vinyl chloride monomer in the presence of an oil soluble emulsifier and at least one initiator in a first reactor having an agitator stirring ...  
WO2002077046A3
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...  
WO/2002/088206A2
Emulsifier free fluoropolymer manufacturing method in which (a) a mixture of an oxidizing agent and reducing agent is used to start the polymerization and where one or the other but not both, are further added during polymerization, or (...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
WO2002050140A3
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) ...  
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 ...  
WO2002028925A3
A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a hydrocarbon sulfonate anionic surfactant of the formula CH3-(CH2)n-SO3M, CH3-(CH2)n-C6H4-SO3M, or CH3-(CH2)n-CH=CHCH2-SO3M, where n is ...  
WO2001092356A3
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...  
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) ...  
WO2002044226A8
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.  
WO2001090206A3
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...  
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...  
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.  
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 ...  
WO2002006355A3
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...  
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?-...  
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...  
WO2001049752A3
Emulsion polymerization of liquid fluorinated monomers which have a boiling point above 50 DEG C and low water-solubility is markedly more efficient if the monomer is pre-emulsified with a nontelogenic fluorinated emulsifier in water.  
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...  
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¿ ...  
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...  

Matches 551 - 600 out of 8,515