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8183337 |
Method of purifying ethylene vinyl alcohol copolymers for use with implantable medical devices
Methods for the purification of ethylene vinyl alcohol copolymers are provided.
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8183336 |
Poly (arylene sulfide)
In a process for producing a poly(arylene sulfide) by polymerizing a sulfur source and a dihalo-aromatic compound in the presence of an alkali metal hydroxide in an organic amide solvent, the...
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8158740 |
Hydrophilic silicones
A process for producing a soluble silicone product is provided. The process includes the steps of chemically reacting a polydialkoxysiloxane with an aliphatic alcohol with or without a catalyst in...
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8148491 |
Preparation of polytrimthylene ether glycol or copolymers thereof
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of...
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8138232 |
Method for recycling plastic materials and use thereof
The invention relates to a method for recycling plastic materials which contain at least two polymers, copolymers or blends thereof based on polystyrene. The plastic material is thereby mixed with...
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8124718 |
Aminoplast resin of high performance for lignocellulosic materials
A process for preparing an aqueous aminoplastic urea-formaldehyde resin suitable for use in bonding lignocellulosic materials, which provides products of very low formaldehyde emission while...
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8124668 |
Silicone-containing ocular lens material with high safety and preparing method thereof
[Problem] To provide a safe ocular lens material having high oxygen permeability, excellent surface wettability, the excellent lubricity/easy lubricating property of surface, little in surface...
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8080195 |
Process for production of fluorine-containing polymers and fluorine-containing polymers
A method of producing a fluoropolymer by which a melt-processable fluoropolymer (A) having a specific unstable terminal group or groups (P) is subjected to melt-kneading in a kneader having a...
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8080196 |
Method and apparatus to achieve crystallization of polymers utilizing multiple processing systems
A continuous process wherein polymers or polymeric materials can be subjected to multiple sequential processing systems of differing temperatures and process conditions to synergistically enhance...
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8067494 |
Magnesium hydroxide-based flame retardant compositions made via in-situ hydration of polymer compounds comprising magnesium oxide
Magnesium oxide (MgO) compounded into a polymer can subsequently be hydrated in-situ within the polymer to form magnesium hydroxide. In the case of silane-based or peroxide-based crosslinkable...
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8053607 |
Method for producing polyether-polyol having narrow molecular weight distribution
A method for producing a polyether-polyol having a narrow molecular weight distribution, which comprises carrying out selective fractional extraction of the low-molecular weight component from a...
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8053550 |
Process for the purification from heavy metals of vinyl chloride polymers
Process for the purification of a vinyl chloride polymer (PVC) comprising at least one compound of a heavy metal, according to which: (a) the PVC is dissolved in a water-miscible polar organic...
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8039578 |
Polyester composition with modifier hydroxyl compound
A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing. In one...
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8039581 |
Thermal crystallization of a molten polyester polymer in a fluid
A process for crystallizing a polyester polymer by introducing a molten polyester polymer, such as a polyethylene terephthalate polymer, into a liquid medium at a liquid medium temperature greater...
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7999061 |
Catalytic lactide and glycolide (co)polymerization system
A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process.
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7999012 |
Fluid based decommissioning and recycling of printer toner cartridges
Disclosed is a system to mechanically destroy printer toner cartridges and reclaim their constituent materials under a water shielded environment while providing a safer and more environmentally...
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7989582 |
Process for producing poly-tetrahydrofuran
The present invention relates to a process for producing tetrahydrofuran polymer or tetrahydrofuran copolymer by using heteropolyacid catalyst, and more particularly, to a process for producing...
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7985778 |
Method for decomposing and reclaiming synthetic resin having ester bond in the composition structure
Synthetic resin containing ester bond is subjected to hydrolysis treatment to reclaim raw material component before polymerization. Method for decomposing and reclaiming synthetic resin having...
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7973092 |
PET bottle recycling
A method for reprocessing used PET bottles having the steps of shredding the bottles to form plastic flakes, sorting the plastic flakes according to at least one criterion into at least two partial...
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7960503 |
Continuous washing of poly(vinyl butyral)
The present invention provides a method for continuously washing poly(vinyl butyral) in which a poly(vinyl butyral) slurry is passed through multiple continuous stirred tank reactors, each of which...
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7956156 |
Method for the removal of isobutene oligomers from an isobutene polymer
A process is described for removing isobutene oligomers from an isobutene polymer by stripping the isobutene polymer with vapors of a saturated hydrocarbon having at least 8 carbon atoms and at...
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7943724 |
Process for preparing diaminodiphenylmethanes
Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form...
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7943676 |
Method of recycling waste plastic foam materials
A method of recycling waste plastic foam materials firstly is to smash a waste material including polyurethane foam into fine particles so as to obtain a first starting material. The first starting...
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7939579 |
Hydrogels and methods of manufacture
Hydrogels, methods of preparing hydrogels, and ophthalmic lenses comprising hydrogels are described. Fully hydrated embodiments of the hydrogels have relatively high water content and oxygen...
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7923039 |
Biopolymer extraction from plant materials
Disclosed is a method and apparatus for the extraction of high molecular weight biopolymers from plants. Specifically, invention described herein relates to the commercial processing of plant...
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7910688 |
Recycling superabsorbent polymer fines
A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the...
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7893122 |
Chemical process for recycling polyethylene terephthalate (PET) waste
The present invention relates to a process for chemical recycling of PET waste that comprises, among other stages, a saponification reaction stage, wherein PET waste particles are reacted with...
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7893195 |
Method for recovering a polymer from a liquid medium
Method for recovering a polymer from a liquid medium (1) substantially containing the polymer and a solvent for the latter, wherein: (a) this liquid medium (1) is injected into a reactor (2)...
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7868125 |
Production of non-solid-stated polyester particles having solid-stated properties
A process for producing non-solid-stated polyester polymer particles having one or more properties similar to polyester polymer particles that have undergone solid-state processing. In one...
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7803897 |
Process for preparing polyketone
The present invention relates to a process for preparing polyketone with improved catalytic activity and intrinsic viscosity, and specifically a process for preparing polyketone, using a mixed...
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7790777 |
Method for recovering a polymer in solution
Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent fluid, whereby the precipitation takes place in a precipitation medium comprising two...
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7767783 |
Poly (arylene sulfide) and production process thereof
A dehydration step is conducted by heating a mixture containing an organic amide solvent and a sulfur source including an alkali metal hydrosulfide, and a part of an overall charged amount of an...
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7767782 |
Solid-state post-condensation process for increasing the molecular weight of a polyamide
The invention relates to a process for increasing the molecular weight of a polyamide via solid-state post-condensation by exposing the polyamide in the solid-state at elevated temperature to an...
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7754848 |
Poly (arylene sulfide) and production process thereof
In a process for producing a poly(arylene sulfide) by polymerizing a sulfur source and a dihalo-aromatic compound in the presence of an alkali metal hydroxide in an organic amide solvent, the...
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7736525 |
Method of making an alkoxylated polyethylenimine product
A method of making an alkoxylated polyethyleneimine (APEI) product having reduced discoloration includes treating a composition including a component selected from the group of polyethyleneimine...
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7700685 |
Method of producing hydrous ethylene-vinyl alcohol copolymer composition
An ethylene-vinyl alcohol copolymer (EVOH) solution is introduced into a tower vessel (1) from a first inlet (2) provided at an upper portion of the tower vessel (1). Water vapor is introduced into...
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7696378 |
Depolymerization process
The present invention relates to a process for decomposing a polymer into a monomer or oligomer by hydrolysis with sub- or supercritical water. The process of the present invention is characterized...
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7687601 |
Methods for purifying polymers using solid scavengers
Conductive polymers are purified using a solid scavenger. The solid scavengers include metal-scavenging functional groups linked to the surface of a particle support material. To improve the...
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7687582 |
Methods of production, purification, and processing of poly(heteroaromatic) block copolymers with improved solubility or dispersability
This invention relates to improved methods for the preparation, purification, and processing of poly(heteroaromatic) block copolymers, as well as compositions prepared by these methods. Methods...
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7687592 |
Hydrophilic silicones
A process for producing a soluble silicone product is provided. The process includes the steps of chemically reacting a polydialkoxysiloxane with an aliphatic alcohol with or without a catalyst in...
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7683122 |
Processes for increasing polymer inherent viscosity
Disclosed are processes for preparing polyareneazole polymers including contacting a molar excess of a free base in water with a terephthalic acid salt to form an aqueous mixture, adjusting the pH...
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7674854 |
Process for producing polyvinyl acetal resin, polyvinyl butyral resin, and process for producing esterified polyvinyl alcohol resin
It is an object of the present invention to provide a method of producing a polyvinyl acetal resin by which a polyvinyl acetal resin having a high acetalization degree can be produced even in a...
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7666975 |
Polyketone and method for producing the same
There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20...
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7654477 |
Pulverization process of a vulcanized rubber material
A process for producing a rubber powder from a vulcanized rubber material by the steps of: a) feeding a grinding device with the vulcanized rubber material; b) contacting the vulcanized rubber...
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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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7563484 |
Permeable polyaniline articles for gas separation
Immersion precipitation of solutions having 15%-30% (w/w) and various molecular weights of the emeraldine base form of polyaniline in polar aprotic solvents are shown to form integrally skinned...
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7563845 |
Amino resin crosslinked particles and producing process thereof
A producing process of amino resin crosslinked particles includes the step of curing an emulsion of an amino resin precursor and an emulsifier in the presence of a catalyst, the amino resin...
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7504476 |
Poly(arylene sulfide) and production process thereof
A dehydration step is conducted by heating a mixture containing an organic amide solvent and a sulfur source including an alkali metal hydrosulfide, and a part of an overall charged amount of an...
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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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7468405 |
Increase in the melting point and the enthalpy of melting of polyamides by a water treatment
A method for increasing at least one of the following two parameters of a polyamide: (I) its melting point and (ii) its enthalpy of melting ΔHm, in which: this polyamide is brought into contact in ...
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