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Class 264/211.24 - Curing or polymerization in the extruder (includes incomplete polymerization or curing, or coagulating rubber)


Subclass of Class 264 - Plastic and nonmetallic article shaping or treating: processes
Definition: Processes wherein some curing or polymerization reaction,
No. of patents: 160
Last issue date: 02/23/2010


1        
NumberTitleIssue Date
7666339Hydrogel string medical device
A hydrogel string that is useful as a medical device and a method for forming a hydrogel string that utilizes a delivery device in which gelation of a prepolymer is initiated to form a hydrogel, which is then extruded from the device as the hydrogel string. ...
02/23/2010
7309744Article formed from cross-linking isotactic polymers in the presence of peroxide
An article of manufacture made of an isotactic polymer, a cross-linking agent, and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%. The ratio of the accelerator to the sulfur...
12/18/2007
7303795Molding of polypropylene with enhanced reheat characteristics
Bottles, containers and other articles are formed from polypropylene compositions that include a reheating agent, such as antimony, carbon black, graphite, titanium, copper, manganese, iron, tungsten, graphite, infra-red absorbing dyes or other infra-red absorbing m...
12/04/2007
7279535Method for the continuous production of polymers made of vinyl compounds by substance and/or solvent polymerization
Production of vinyl polymers by the polymerization of vinyl monomers in a planetary gear extruder. ...
10/09/2007
7255134Carbon black-containing crosslinked polyethylene pipe having resistance to chlorine and hypochlorous acid
Pipe or tubing of crosslinked polyethylene (“PEX”) containing less than 2% by wt. carbon black provides improved resistance to oxidizing agents such as chlorine and hypochlorous acid in water. The pipe may be further protected with a thin tubular core (inner lay...
08/14/2007
7256250Biodegradable coating
The object of the present invention is a biodegradable polymer network and methods to make it. The polymer network consists of a cross-linked polyester resin, which is composed of hydroxy acid units, structural units derived from an unsaturated bifunctional monomer,...
08/14/2007
7241844Method for cross-linking isotactic polymers in the presence of peroxide
A method for making isotactic polymer using a cross-linking agent entails introducing the cross-linking agent to a polymer and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%...
07/10/2007
7217782Cooling of pellets from pet solid stating reactor with water
Energy savings are realized during the commercial production of polyethylene terephthalate by partially cooling polyethylene terephthalate pellets exiting a solid stating reactor by contact with water, and using the residual heat stored in the pellets to vaporize as...
05/15/2007
7195728Method for molding rubber product
A method of molding a rubber product from a rubber compound by a molding apparatus having a kneading region. A full amount of carbon black (CB) and a full amount of process oil, together with other auxiliary materials except vulcanizing chemicals, are compounded wit...
03/27/2007
7186362Methods of improving the wear resistance of prosthetic medical devices
A prosthetic medical device exhibiting improved wear resistance is fabricated by sealing at least one polyolefinic material in an airtight container and providing an inert atmosphere within the airtight container. The polyolefinic material is exposed to an irradiati...
03/06/2007
7160593Polyefinic pipe having a chlorinated polyolefinic hollow core
A multi-layered pipe of arbitrary length and cross-section is produced by co-extrusion of a lower polyolefin (C2–C4) outer body over the exterior surface of a tubular core of randomly, partially randomly, or blocky chlorinated lower polyolefi...
01/09/2007
7150842Method of extruding a mixture
A method of extruding a mixture made of a granulate, chips, or powder, etc. of a first thermoplastic and a second thermoplastic is described, the melting range of the first thermoplastic differing from the melting range of the second thermoplastic, using an extruder...
12/19/2006
7086421Crosslinked polyethylene pipe having a high density polyethylene liner
A multilayer PEX pipe having improved resistance to oxidizing agents in water. The pipe has a thin tubular core (inner layer) of high density polyethylene and an outer layer of crosslinked polyethylene. The pipe may optionally have an oxygen barrier layer, such as p...
08/08/2006
7017732Multiple extruder configuration
The invention concerns a multiple-extruder configuration in which two co-rotating twin-screw extruders and a counter-rotating twin screw extruder are connected to each other with respect to the flow of material. ...
03/28/2006
6930163Process for the continuous preparation of thermoplastically processable polyurethanes with improved softening properties
Process for the continuous preparation of thermoplastically processable polyurethane elastomers with improved softening properties is disclosed. The process is carried out in a tubular reactor at a ratio of the circumferential speed of the stirrer (in m/sec) in the ...
08/16/2005
6911522Filled epsilon-caprolactone based polymer compositions, method for preparing same and articles based on said compositions
Compositions based on ε-caprolactone polymer, comprising at least one ε-caprolactone polymer and calcium carbonate. Process for preparing these compositions, which are used for manufacturing articles, in particular films, preferably obtained by extrusion blow-moul...
06/28/2005
6833427Polycarbonate resin molding material for optical use
A polycarbonate resin molding material for optical use which is pellets formed from a polycarbonate resin and having a bulk density of 0.72 kg/l or more and an optical disk substrate formed therefrom. According to the present invention, use of the above pelle...
12/21/2004
6805945Waterproof heat-preservative film and manufacture method thereof
A waterproof heat-preservative film is formed by providing a melt of a waterproof material, mixing phase-change microcapsules with the melt to form a mixture, solidifying the mixture and pulverizing the solidified mixture to form particles containing phase-change mi...
10/19/2004
6803004High throughput process for reactive extrusion of epoxy resin
The present invention provides low cost resins (e.g., advanced epoxy resins), processes for making these resins, and coatings made with theses resins. Specifically, the present invention provides high throughput extrusion processing of advanced epoxy resins using an...
10/12/2004
6790916Process for the preparation of soft, low-shrinkage, thermoplastic polyurethane elastomers which can be easily released from the mold
The present invention relates to a process for the production of molding compositions, which can easily be released from the mold. These molding compositions comprise thermoplastic polyurethanes with a hardness of 45 to 65 Shore A, with good mechanical properties, w...
09/14/2004
6720406High-purity polymer granules and method for the production thereof
A process for producing polymer pellets is disclosed. The process that is particular suitable for making polycarbonate pellets entails extruding a polymer melt, cooling the extrudate by contacting it with a cooling fluid and pelletizing the solidified polymer. The p...
04/13/2004
6637181Elastane threads and method for the production thereof
Described is a process for producing segmented polyurethanes having improved processing characteristics in the melt state and an efficient spinning process based thereon to form highly elastic, fine linear density elastane yarn and filament having improve...
10/28/2003
6582640Process for the continuous production of a preform mat
From about 50 to about 90% by weight of fibers, in particular wood fibers, and/or pellets made from cellulose or from wood, are mixed with from about 10 to about 50% by weight of a hot-curing resin, each of the percentages by weight being based on the tot...
06/24/2003
6537473Process of making polyolefin fibers
Polyolefin fibers and polyolefin yarns of high strength and elongation and textile fabrics produced therefrom, which consist of modified propylene polymers, unmodified propylene polymers and adjuvants, are produced by melting the polyolefin mixtures in th...
03/25/2003
6537404Continuous manufacturing method and manufacturing apparatus of thermoplastic polyester resin foam
A thermoplastic polyester resin is fed into a twin extruder, wherein a resin is heated for melting, thereby removing moisture in the resin by evacuating and sucking from a vent port thereof, injecting a foaming agent into the resin to which is pushed out ...
03/25/2003
6524516Apparatus and a method for the extrusion of moulding from a cross-linkable polymer material
The present invention relates to apparatus for extruding mouldings from cross-linkable polymer material. The apparatus includes a first part to which the polymer material is delivered from a material container, and a second part which forms a moulding too...
02/25/2003
6465583Continuous polymerization and direct fiber spinning and systems for accomplishing same
Continuous anionic polymerization and melt-spinning of a polycaprolactam includes forming a reaction mixture by bringing at least two streams of liquid caprolactam respectively containing a polymerization initiator and co-initiator into contact with one a...
10/15/2002
6454976Pelletizing of broad molecular weight polyethylene
Polyethylene having a broad molecular weight distribution is extruded in pellet form using a pelletizing extruder having one or more zones essentially filled with the polyethylene and two or more zones partially filled with the polyethylene. The polyethyl...
09/24/2002
6436326Forming slurry of reactive components and continuously feeding into continuous reactor
A process and apparatus for preparing compositions including one or more resinous materials and/or other ingredients using a continuous reactor combined with a slurry vessel for feeding a slurry feed stream to the reactor. More specifically, the process a...
08/20/2002
6420512Extrusion method for making polycarbonate
Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis-methyl salicyl carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutyl phosphonium acetate (TBPA) affords polycarbonate...
07/16/2002
6399705Method of preparing polyethylene glycol modified polyester filaments
Disclosed is a method of copolymerizing polyethylene glycol (PEG) into polyethylene terephthalate (PET) to achieve a polyethylene glycol-modified polyester composition that can be spun into filaments. The method includes the steps of copolymerizing polyet...
06/04/2002
6313212Continuous process for producing semi-finished rubber products with a silica reinforcing filler, for tyres, and tyres thus produced
A process for producing a rubber compound for tires, where the ingredients of the rubber compound include: a polymer base containing an unsaturated chain which can be crosslinked with sulphur-based systems; at least one silica-based reinforcing filler; a ...
11/06/2001
6306514Slip-coated elastomeric flexible articles and their method of manufacture
In accordance with the present invention, there is provided an elastomeric flexible article, such as a surgeon's glove,and its method of manufacture. A flexible elastomeric article has a wearer-contacting surface in which a lubricant composition has been ...
10/23/2001
6287499Process of making bioabsorbable block copolymer filaments
A method for making bioabsorbable block copolymer includes extruding a mixture of first polymeric component particles with second polymeric component particles under conditions sufficient to cause transesterification. The resulting block copolymer filamen...
09/11/2001
6258310Cross-linking thermoplastic polyurethane
The invention comprises modifying a preformed thermoplastic polyurethane product made from the reaction of a difunctional isocyanate with a polyester or a polyether diol, along with a monomeric, low molecular weight diol as a chain extender. The preformed...
07/10/2001
6180053Process for manufacturing a biodegradable blown film
Process for manufacturing a blown film essentially consisting of an aliphatic polyester, according to which: (1) the polyester is synthesized from at least one cycloaliphatic ester, with the intervention of an initiator comprising at least one metal trial...
01/30/2001
6180749Glass clear heavy gauge sheet with copolyester
The present invention relates to a glass clear heavy gauge sheet with copolyester, having over than 83% of lights transmittance and lower than 5% of Haze, prepared by copolymer wherein polymerized [A] the acid ingredient component (i) terephthalate moiety...
01/30/2001
6171537Preparation of poly (urethaneurea) fibers
A process for the preparation of poly(urethaneurea) fibers by reacting a blocked aliphatic diamine with a capped glycol prepolymer, followed by extrusion spinning, is provided....
01/09/2001
6159597Centrifugal spinning process for spinnable solutions
The invention pertains to a process for spinning fibers or filaments from a spinnable solution using a centrifuge of which the wall has one or more spinning orifices, in which process the spinnable solution is jetted from the centrifuge into a coagulant i...
12/12/2000
6159405Phenolic resin system for pultrusion composites
A fire resistant phenolic resole-resorcinol novolac system for a pultrusion process, having a much improved pot life of the two part mixture, lower emissions during processing and a much better surface finish of the pultruded composite when compared to a ...
12/12/2000
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