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7569658 |
Process for the solvent treatment of a plastic
Process for the solvent treatment of a plastic, by dissolving the plastic with a solvent and with at least one phase separation agent compatible with the solvent to form a solution, precipitating...
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7491791 |
Method for producing submicron polytetrafluoroethylene powder and products thereof
A method for treating polytetrafluoroethylene (PTFE) in its reactor latex form to produce a dry submicron PTFE powder that remains stable without rheology modifiers, surfactants, wetting agents, pH...
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7459520 |
Poly(arylene ether) and an apparatus for producing the same
A poly(arylene ether) produced by combining a poly(arylene ether) solution with an antisolvent at a shear rate of greater than 50,000 sec −1 . The high shear mixing conditions produce a...
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7439318 |
Method for trace water analysis in cyclic siloxanes useful as precursors for low dielectric constant thin films
An analytical technique for the accurate and precise measurement of trace water in chemical reagents, comprising the steps of combining a chemical reagent comprising ≦5 ppm water, with...
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7378266 |
Process for the solvent-based extraction of polyhydroxyalkanoates from biomass
Improved processes for extracting polyhydroxyalkanoate from a biomass containing the polyhydroxyalkanoate including the steps of: combining the biomass containing the polyhydroxyalkanoate with a...
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7259231 |
Extraction and fractionation of biopolymers and resins from plant materials
A method for the extraction, separation, fractionation and purification of biopolymers from plant materials using supercritical and/or subcritical solvent extractions is disclosed. Specifically,...
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7189795 |
Poly(arylene ether)s bearing grafted hydroxyalkyls for use in electrically conductive adhesives
A poly(arylene ether) polymer includes polymer repeat units of the following structure:
—(O—Ar 1 —O—Ar 2 ) m —(O—Ar 3...
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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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7179878 |
Poly(arylene ether) polymer with low temperature or UV crosslinking grafts and dielectric comprising the same
Poly(arylene ether) polymers are provided having polymer repeat units of the following structure:
wherein Ar 1 , Ar 2 , Ar 3 , and Ar 4 are identical or different aryl radicals, m is 0 to 1, n...
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7151158 |
Method of preparing a poly(arylene ether), apparatus therefor, and poly(arylene ether) prepared thereby
A method of precipitating a poly(arylene ether) includes combining a poly(arylene ether) solution with an antisolvent at a shear rate of greater than 50,000 sec −1 . The high shear mixing...
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7148320 |
Polymer purification
Polymers derived from various monomers are purified by fractionalization of the crude polymers in a solvent/non solvent system via reverse precipitation.
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7094867 |
Method of continuously cleansing polyarylene sulfide
A polymerizate slurry obtained through a reaction of an alkali sulfide source and an aromatic dihalide compound in an organic polar solvent and comprising polyarylene sulfide particles, a...
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7049394 |
Method for preparing free flow resin
The present invention provides a method for producing a free flowing and/or non clumping resin that includes prior to drying, shrinking the resin under agitation. In one variant of the invention,...
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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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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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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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6979720 |
manufacture of certain cyclic ester oligomers
Enzymes which are capable of catalyzing esterifications and/or transesterifications such as selected lipases and esterases can, under specified conditions, convert certain lower linear oligomers of...
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6936685 |
Method for isolating polyorganosiloxanes
The invention relates to a method for isolating polyorganosiloxanes from an aqueous dispersion, wherein the polyorganosiloxanes are separated from water in a dissolved form with the aid of an...
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6906168 |
Process for fractionation/concentration to reduce the polydispersivity of polymers
Methods of reducing the amount of undesirable by-products in the production of polymers are disclosed. The resulting polyetherimides have lower polydispersivity and enhanced thermomechanical...
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6787633 |
Method and apparatus for preparing a poly(arylene ether)
A method of precipitating a poly(arylene ether) includes preparing a poly(arylene ether) solution comprising a poly(arylene ether) and a solvent, combining the poly (arylene ether) solution with an...
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6774157 |
Biocompatible medical devices with polyurethane surface
A system for improving the biocompatibility of medical devices present within a patient's body. In one embodiment, the present subject matter reduces the thrombogenicity of polyurethane materials...
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6764986 |
Process for producing particles of amine reaction products
There is provided a process for producing particles of amine reaction product by means of an acid carrier. Processed amine reaction products and finished compositions incorporating such processed...
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6762221 |
Use of naphthalenesulfonic acid-formaldehyde condensates products as drying aids
Naphthalenesulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions. Also described is a process for preparing polymer powders by drying, using...
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6670444 |
Processes for synthesizing borohydride compounds
The present invention relates to processes for producing borohydride compounds. In particular, the present invention provides efficient processes and compositions for the large-scale production of...
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6657003 |
Cell adhesion solution
A cell adhesion solution of a cross-linked polymer for substrates includes an amino acid polymer, a buffered cross-linking agent, and deionized water (DI H 2 O). In one example, the amino acid...
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6649734 |
Curable coating compositions having improved compatibility and scratch and mar resistance, cured coated substrates made therewith and methods for obtaining the same
The invention provides coating compositions having improved scratch and mar resistance. The curable coating compositions of the invention comprise a film-forming component (A) comprising one or...
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6593451 |
Method of processing polyacrylonitrile
The present invention involves a method of processing polyacrylonitrile into a predetermined form. The first step in this method includes preparing a solution of a room temperature solvent that...
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6552163 |
Method for fractioning poly (ethylene oxide) formed using a metallic cyanide catalyst
A poly(ethylene oxide) polymer having low and high molecular weight fractions is fractionated by dissolving the polymer in a solvent for the low molecular weight fraction. A good separation of the...
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6518395 |
Method for producing reactive coating powder compositions
Process for preparation powder coating formulations by pressure release of a composition comprising a low molecular mass inert compound, with release of the low molecular mass inert compound, in...
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6437080 |
Process for preparing polyarlethers
Process for the preparation of a polymer composition comprising at least one aromatic or a mixture thereof, the process comprising: i) obtaining a reaction mixture comprising polymer precursors in...
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6423821 |
Method for producing poly(p-t-butoxystyrene)
A method for producing poly(p-t-butoxystyrene), which comprises polymerizing p-t-butoxystyrene in a hydrocarbon type reaction solvent in the presence of a polymerization initiator, and, after...
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6340580 |
Methods for purifying polyhydroxy alkanoates
A method is provided for isolating and purifying PHA from microbial or plant biomass that contains PHA. The method includes the step of extracting PHA from the biomass using at least one solvent...
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6294645 |
Dry-strength system
The invention relates to resin systems useful for imparting dry-strength to paper without substantially increasing the paper's wet-strength wherein the resin system comprises a cationic component...
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6255362 |
Ocular lens material and process for producing the same
An ocular lens material comprising a polymer prepared by polymerizing a polymerizable component for an ocular lens, containing (A) 20 to 50% by weight of a silicon-containing alkyl acrylate, (B) 20...
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6241828 |
Method of cleaning or purifying elastomers and elastomeric articles which are intended for medical or pharmaceutical use
A method is disclosed for removing impurities from an elastomer intended for medical or pharmaceutical use, which includes a step of performing a first solvent extraction process on the elastomer...
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6103861 |
Strength resins for paper and repulpable wet and dry strength paper made therewith
An ionic thermosettable resin useful for imparting wet and dry strength to paper is made by: (a) providing a copolymer comprising monomer units derived by copolymerization of acrylamide or...
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6069181 |
Process for recycling polyarylene sulfides
The present invention relates to a process for obtaining polyarylene sulfide from polyarylene sulfide-containing material. For this purpose, the polyarylene sulfide-containing material is treated...
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6028167 |
Use of phenolsulfonic acid-formaldehyde condensation products as drying aids
Phenolsulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions. Also described are a process for preparing polymer powders by drying, using these...
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6015875 |
Process for making acetals
Acetals are produced from the reaction of aldehydes and alcohols, e.g. methylal by the reaction of methanol and formaldehyde, by the reaction in a reaction distillation column of the alcohol and...
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6015609 |
Process for manufacture of a porous polymer from a mixture
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5985969 |
Polyamic acid precursors and methods for preparing higher molecular weight polyamic acids and polyimidebenzoxazole
Polyimide precursor solutions comprise an organic liquid and the reaction product of an aromatic dianhydride and an aromatic diaminobenzoxazole capped, on at least one terminal end, with a...
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5981051 |
Method for producing granular polycarbonate prepolymer for solid-state polymerization
Provided is a method for producing a granular polycarbonate prepolymer for solid-phase polymerization, comprising dissolving a polycarbonate prepolymer in a solvent under heat, then crystallizing...
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5977294 |
Polymer deformulation by solvent solution filtration
A process for polymer deformulation by solvent solution filtration begins by including formulated polymers and/or polymer products in a recycle stream. The formulated polymer products include a...
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5973019 |
Peroxide blend compositions and methods for curing polyester resins
This invention relates to a method of curing unsaturated polyester resins or mixtures of such resins and a monomer copolymerizable therewith. More particularly, the invention relates to the curing...
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5942597 |
Solvent extraction of polyhydroxyalkanoates from biomass
The present invention relates to a process for separating polyhydroxyalkanoate from a biomass, the process comprising extracting the polyhydroxyalkanoate with at least one PHA solvent selected from...
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5929204 |
Process for removing metals from vinylphenol-type polymers
Vinylphenol-type polymers are useful materials and are used in many fields such as photoresist, packaging material for IC, printed circuit board, lense, etc. When the polymers are used in an...
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5922835 |
Method for compacting expanded polystyrene
The inventions refers to a method of compacting expanded polystyrene (EPS). EPS, especially in the state of waste, constitutes a problem due to its voluminous nature. High logistic costs are...
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5908914 |
Benzylic ether phenolic resole resins and their uses
This invention relates to benzylic ether phenolic resole resins prepared in a sealed reaction vessel and their uses. The benzylic ether phenolic resole resins are prepared by heating phenol and an...
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5905139 |
Purification of polysilane
A polysilane containing insoluble matter and microgel as impurities is purified by dissolving the polysilane in a good solvent to form a polysilane solution, adding a poor solvent to the polysilane...
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5891573 |
Method of providing friable polytetrafluoroethylene products
A method is disclosed for providing a friable polytetrafluoroethylene (PTFE) product that has particles of a desired size which are flowable and do not tend to agglomerate. To achieve this result,...
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