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7622061 |
Apparatus for crystallizing polymer particles
The present invention is a process and apparatus for conserving loss of heat while forming and crystallizing polymer particles in a liquid. The cooling liquid quenches the polymer during particle...
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7595367 |
Poly(arylene ether) preparation method
Capped poly(arylene ether)s are prepared by a method that includes reacting a poly(arylene ether) with a capping agent to form a capping reaction mixture, washing the capping reaction mixture with...
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7582723 |
Process and apparatus for the polymerization of ethylene
Process for the polymerization of ethylene or of ethylene with further 1-olefins, in which the ethylene is polymerized in the presence of a catalyst in a gas-phase reactor and reaction gas...
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7582724 |
Recovering ethylene and vinyl acetate from the residual gas stream of vinyl ester-ethylene copolymer preparation
In a process for the preparation of copolymers containing vinyl esters and ethylene or ethylenically unsaturated monomers by aqueous, free radical polymerization at a pressure of from 5 to 100 bar...
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7575724 |
Continuous slurry polymerization apparatus
A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and...
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7528222 |
Olefin polymerization process
Disclosed is a method for reducing fouling in an apparatus and process for separating polyolefin from a slurry in a slurry polymerization reactor system comprising contacting in a reactor at a...
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7517947 |
Polymer transfer within a polymerization system
A method for transferring polymer within a polymerization system, comprising continuously withdrawing the polymer from the reactor and conveying the polymer from a reactor to a flash chamber via a...
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7517946 |
Production process of poly(arylene sulfide)
In the dehydration step, a mixture comprising an organic amide solvent and a sulfur source is heated, vapor volatilized is guided to a distillation column, a fraction comprising the organic amide...
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7514527 |
Method and apparatus for crystallizing polymer particles
The present invention is a process and apparatus for conserving loss of heat while forming and crystallizing polymer particles in a liquid. The cooling liquid quenches the polymer during particle...
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7488790 |
Processing of bimodal polymers
The present invention discloses the use of a supercritical fluid to improve the homogeneity of heterogeneous bi- or multi-modal resins resulting from a physical or a chemical blend of two or more...
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7485696 |
Oxytetramethylene glycol copolymer and method for producing the same
Disclosed is an oxytetramethylene glycol copolymer, which is obtained by copolymerizing tetrahydrofuran and neopentyl glycol and which has a specific number average molecular weight Mn, a specific...
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7459519 |
Method for manufacturing electrically conductive macromolecules and solid state electrolytic capacitor using electrically conductive macromolecules
The method for manufacturing electrically conductive macromolecules of the present invention is provided by reacting at least a monomer and an oxidizing agent to obtain electrically conductive...
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7420027 |
Method for producing a borohydride
A method for producing a borohydride is described and which includes the steps of providing a source of borate; providing a material which chemically reduces the source of the borate to produce a...
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7351779 |
Polymerization process and reactor system
A process for polymerizing one or more monomers is provided. In at least one specific embodiment, the process includes preparing a mixture comprising the one or more monomers, a catalyst system and...
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7345132 |
Method of producing novolak resin
Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid...
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7342079 |
Polymerization process and reactor system
This invention is directed to processes for making polymer in the presence of a hydrofluorocarbon, and for the recovery of polymer substantially free of dissolved hydrocarbons and...
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7335721 |
Polytetrafluoroethylene treatment
One or more PTFE films are heated to greater than 150 degrees centigrade (C) and for a time greater than 20 hours, then the PTFE films are cooled. The PTFE films may be heated to temperatures...
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7332058 |
Heat exchanger and process for devolatilizing polymers using same
Disclosed is a process for devolatilizing a polymer including passing the polymer through a devolatizer including a plate heat exchanger wherein the plates of the plate heat exchanger are heated by...
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7304123 |
Processes for shaping macrocyclic oligoesters
In one aspect, the invention relates to processes for producing substantially free-flowing shapes of macrocyclic oligoester, wherein the freshly-shaped macrocyclic oligoester is maintained at...
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7296576 |
Polymers for enhanced solubility of nanomaterials, compositions and methods therefor
Poly(aryleneethynylene) polymers, poly(ferrocenylaryleneethynylene) polymers and poly(ferrocenylethynylene) polymers having properties particularly useful for solubilizing nanomaterials and for...
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7282554 |
Low molecular weight polyphenylene ether
A low molecular weight polyphenylene ether having a reduced viscosity of 0.04 to 0.18 dl/g as measured at 30° C. in a 0.5 g/dl chloroform solution, and a molecular weight distribution of 1.5 to...
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7268206 |
Process and apparatus for degassing a polymer
The present invention relates to a process for stripping residual volatile compounds contained in a thermoplastic polymer. The process comprises (1) forming the polymer in the form of a melt...
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7241859 |
Process for treating a polyolefin discharged from an olefin polymerization reactor
Process for treating polyolefin discharged from an olefin polymerization reactor which comprises steps of discharging from a polymerisation reactor a slurry comprising polyolefin and diluent;...
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7238773 |
Countercurrent stripping pipe
Countercurrent stripping pipe for removing volatile organic constituents from reaction products, having a column pipe ( 201 ) composed of a plurality of pipe sections ( 201 a - d ), in which trays...
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7226989 |
Method of separating a polymer from a solvent
A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder...
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7223800 |
Method for producing regenerated fluororesin and regenerated fluororesin article
A method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a heat treatment at a temperature of from room temperature...
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7217783 |
Oxytetramethylene glycol copolymer and process for producing the same
An oxytetramethylene glycol copolymer obtained by copolymerizing tetrahydrofuran and neopentyl glycol which has a specific number average molecular weight Mn, a specific molecular weight...
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7183372 |
Preparation of ketone-formaldehyde resins
A process for preparing ketone-formaldehyde resins, especially acetophenone- and cyclohexanone-formaldehyde resins, having a low water content and high thermal stability and yellowing resistance,...
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7157518 |
Method for preparing an organo-silicon sol and materials obtained from such a sol
The method consists in hydrolysing an initial volume Vse of a precursor material comprising at least one polyalkoxysilane with a quantity of water such that
x H 2 O x Si ≥...
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7153929 |
Copolymers, devoid of rubber, with low residual monomer content and a method and device for producing the same
Rubber-free copolymers of unsaturated monomers selected from the group comprising styrenes and vinyl cyanides are disclosed. The copolymers that contain 65 to 80 wt. %, of styrene and 20 to 35 wt....
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7144981 |
Process for separating volatile components from polymers
A process for concentrating polymers by evaporation is disclosed. The process entails (i) obtaining a mixture containing a polymer and volatile component, the volatile components being present in...
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7132484 |
Continuous process for producing poly (trimethylene terephthalate)
A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low...
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7124768 |
Method for transferring aqueous polymer dispersions from one container to another container
A method of transferring an aqueous polymer dispersion with a temperature ≧50° C. from a vessel 1 via a connecting line to a vessel 2 is described.
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7122619 |
Method of separating a polymer from a solvent
A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder...
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7109290 |
Polymer transfer within a polymerization system
A method for transferring polymer within a polymerization system, comprising continuously withdrawing the polymer from the reactor and conveying the polymer from a reactor to a flash chamber via a...
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7087139 |
Apparatus and method for removal of volatiles from a mass processable polymer
The present invention provides an apparatus and method of reducing volatiles in a mass processable polymer. The apparatus includes a multi-chambered devolatilizer having first and second collectors...
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7087685 |
Process and system for removing heavies from diluent recycled to a slurry polymerization reactor
A recycling and recovery system and process comprising a flash gas separator that receives a slurry comprising liquid medium and solid polymer particles. The flash gas separator separates the...
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7071291 |
Isolation, formulation and shaping of macrocyclic oligoesters
Processes for isolating, formulating, and shaping macrocyclic oligesters were developed which allow efficient production of macrocyclic oligoesters substantially free from solvent, which may...
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7067608 |
Process for preparing branched polyarylene ethers
Disclosed is a process for preparing branched polyarylene ether polymers by (A) providing a reaction mixture comprising (i) a polyfunctional phenol compound of the formula Ar(OH) x wherein x≧3...
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7060788 |
Process for stripping monomers and other volatile constituents from polymer melts
A process for stripping volatile constituents from polymer melts is disclosed. The process entails introducing the polymer melt into a horizontally oriented cylindrical device that contains a...
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7049393 |
Techniques for the preparation of highly fluorinated polyethers
A process for preparing a fluorinated poly(arylene ether) comprising the repeating unit:
wherein n provides a molecular weight up to about 30,000 to 100,000, X represents one of following...
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7041772 |
Method for producing benzoxazine resin
The present invention discloses a process for producing a benzoxazine resin which comprises the steps of reacting a phenol compound, an aldehyde compound and a primary amine in the presence of an...
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7041780 |
Methods of preparing a polymeric material composite
Methods to prepare a poly(arylene ether) and poly(alkenyl aromatic) polymeric material having reduced levels of particulate impurities are described. The polymeric material prepared is suitable for...
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7038008 |
Method for the processing of a liquid reaction discharge of the cationic polymerization of isobutene
A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and an inert diluent, in which...
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7026433 |
Continuous bioreactor process for the preparation of polyester cyclic oligomers
A continuous process for the process for the enzyme-catalyzed preparation of cyclic ester oligomers from linear ester oligomers. The process may use a linear or recirculating reactor.
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7001978 |
Unsaturated ester substituted polymers with reduced halogen content
Polymers of the formula
wherein x is 0 or 1, R 1-4 are alkyl, aryl, arylalkyl, or alkylaryl groups, X 1-4 are halogens, a′, b′, c′, and d′ are 0–4, UE is an unsaturated ester group,...
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6998465 |
Process for producing boric ester compound, electrolyte for electrochemical device, and secondary battery
A process for producing a boric acid ester compound which comprises esterifying a compound represented by the formula (1):
X—[O(AO) n...
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6992165 |
Method for making amine-terminated polyarylene polyethers
A method for making an amine-terminated polyarylene polyether thermoplastic in which a liquid/solid slurry reaction mixture is formed in an oxygen-free atmosphere. The reaction mixture is composed...
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6987201 |
Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride
The present invention provides acetic anhydride, a method of purifying crude acetic anhydride, and a method of producing polyoxytetramethylene glycol using acetic anhydride. A method of producing...
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6984717 |
Phosphorous containing materials, their preparation and use
The present invention is directed towards phosphorous containing organic materials, processes for making them and uses thereof. These materials preferably impart and/or exhibit resistance to...
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