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8178594 |
Antioxidant stabilized crosslinked ultra-high molecular weight polyethylene for medical device applications
An antioxidant combined with UHMWPE prior to subjecting the UHMWPE to crosslinking irradiation. In one exemplary embodiment, the antioxidant is tocopherol. After the antioxidant is combined with...
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8129440 |
Antioxidant stabilized crosslinked ultra-high molecular weight polyethylene for medical device applications
An antioxidant combined with UHMWPE prior to subjecting the UHMWPE to crosslinking irradiation. In one exemplary embodiment, the antioxidant is tocopherol. After the antioxidant is combined with...
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8110612 |
Process for preparing adhesive using planetary extruder
A process for preparing a pressure sensitive adhesive using a modified planetary roller extruder is described. The process in accordance with one aspect of the invention includes introducing...
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8076387 |
High modulus crosslinked polyethylene with reduced residual free radical concentration prepared below the melt
The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of...
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7943680 |
Stress relaxation in crosslinked polymers
The invention provides methods for inducing reversible chain cleavage of polymer chains in a crosslinked polymeric material. Reversible cleavage of the polymer backbone is capable of relieving...
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7714038 |
Modified polyolefin waxes
Polyolefin waxes bearing (meth)acrylate groups, process for preparing them and their use.
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7714035 |
Plumbing manifolds
There is provided a method for preparing a plumbing manifold for use in a water system in which the manifold after molding is subjected to cross-linking high energy radiation. The manifold is made...
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7635725 |
Crosslinked polymers
Highly crystalline, oxidation resistant crosslinked polymeric materials such as crosslinked ultrahigh molecular weight polyethylenes having high wear resistance, enhanced stiffness, enhanced...
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7569620 |
High modulus crosslinked polyethylene with reduced residual free radical concentration prepared below the melt
The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of...
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7521486 |
Branched chain fluoropolymers
Fluoropolymers are made by admixing tetrafluoroethylene, hexfluoropropylene, and vinylidene fluoride; reacting the reaction admixture to generate a set of fluoropolymeric oligomers; irradiating the...
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7514481 |
Polymer electrolytes crosslinked by e-beam
A method of making a crosslinked polymer is provided as well as the polymer so made, the method comprising the steps of: providing a highly fluorinated fluoropolymer, typically a perfluorinated...
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7507774 |
High modules crosslinked polyethylene with reduced residual free radical concentration prepared below the melt
The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of...
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7456231 |
Radiation-crosslinked polyolefin compositions
An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene...
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7449497 |
Polymerisation method, polymers and uses thereof
Monomers (e.g. thinphenes) are caused to polymerise by mixing them with an oxidising agent (and generally a solvent comprising water) and irradiating the mixture with light (visible or UV). Polymer...
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7388039 |
UV-curable, non-chlorinated adhesion promoters
Modified polyolefins are produced by reacting a functionalized polyolefin with one or more ethylenically unsaturated compounds having a functional group reactive with the functional group on the...
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7361696 |
1,4-disubstituted diacetyline polymer and process for producing the same
A 1,4-di-substituted diacetylene polymer that is soluble in organic solvent, is composed of a repeating unit represented by the general formula ═CR—C≡C—CR′═ (wherein, R and R′ represent ide...
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7329693 |
Adhesive composition and method for bonding to rubber
An adhesive composition of the present invention comprises (A) a conjugated diene polymer having a weight-average molecular weight of 500 to 100,000 and (B) an electron pair-donating basic...
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7291655 |
Polymerisation method and device for carrying out a polymerisation method
A polymerization process with elevated productivity using a coordination catalyst, wherein electromagnetic radiation is applied during polymerization. The irradiation of light greatly increases the...
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7265162 |
Bromine, chlorine or iodine functional polymer electrolytes crosslinked by e-beam
A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, as well...
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7220788 |
Fluororubber molded article and method for producing the same
The present invention relates to a fluororubber molded article obtained by subjecting a fluororubber composition to crosslinking by irradiation of ionizing radiation, wherein the fluororubber...
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7112614 |
Crosslinked polymer
A method is provided for obtaining crosslinked polymers, particularly fluorinated polymers having pendent sulfonic acid groups, by crosslinking through pendent groups which include a sulfonyl...
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6692679 |
Cross-linked molded plastic bearings
A method is provided for forming a plastic prosthesis bearing, net-shape bearing, near net-shape bearing or plastic stock from which such a bearing can be formed. The method includes the steps of...
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6562540 |
Process for medical implant of cross-linked ultrahigh molecular weight polyethylene having improved balance of wear properties and oxidation resistance
A medical implant of ultrahigh molecular weight polyethylene having an improved balance of wear properties and oxidation resistance is prepared by irradiating a preform of ultrahigh molecular...
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6184265 |
Low temperature pressure stabilization of implant component
Wear resistance and oxidation resistance of polymer material or a polymer component for bioimplantation are improved by packaging a polymer object in a sealed gas impermeable package substantially...
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6124371 |
Anionic photocatalyst
The invention relates to a composition comprising polymerizable material and an anionic photocatalyst. The photocatalyst is a photolabile compound able to liberate a strong base having a pKa ≥12. T...
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6048912 |
Rubber polymerizates with a high gel content and a high swelling degree
A process for the manufacture of rubber polymerizates comprising the steps of treating said rubber polymerizate with electron beam radiation to adjust the gel content and swelling index of said...
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6008265 |
Fluorinated ionic sulfonylimides and sulfonylmethylides, process of preparing same and use thereof as photoinitiators
An ionic compound comprising at least one group A+ X-, comprising: a cationic group A+ selected from the group consisting of biaryliodonium, arylsulfonium, arylacylsulfonium, diazonium and...
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5877230 |
Anionic photoinitiation
A method for the anionic photoinitiation of polymerization or crosslinking of a substrate by irradiating a mixture of a substrate and a photoinitiator, where the photoinitiator is an inorganic...
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5872157 |
Method for olefin oxidation
A process for making oxidized olefins is disclosed. Specifically, the process comprises providing an olefin and oxygen in combination in a reaction medium comprising carbon dioxide, and then...
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5776240 |
Granules based on pyrogenically prepared silicon dioxide, methods for their preparation and use thereof
Granules based on silicon dioxide and having the properties: Average particle size: 10 to 120 μm BET surface area: 40 to 400 m2 /g Pore volume: 0.5 to 2.5 ml/g Pore size distribution: less than 5% ...
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4668356 |
Photolytic process for the formation of carbon-containing free radicals and its applications to free radical polymerization in particular
Process for the formation of carbon-containing free radicals R., which optionally include functional groups, wherein thermal and/or photochemical energy is supplied to a thiocarbonyl-containing...
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4129487 |
Process for improving the properties of an aqueous emulsion type coating composition
A process for producing an aqueous emulsion type coating composition, which can form a film having excellent resistance to chemicals and water, which comprises irradiating the aqueous emulsion...
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3694422 |
LIGHT ACTIVATION OF TETRAALKYLCHROMIUM COMPOUNDS IN POLYMERIZATION OF OLEFINS
The activity of tetraalkylchromium compounds as catalysts for the polymerization of 1-olefins is greatly enhanced by exposure of the catalyst, either prior to or during the polymerization, to...
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3666743 |
POLYMERIZATION OF 1-OLEFINS WITH TETRAKIS(BICYCLOHEPTYL)CHROMIUM COMPOUNDS AS CATALYSTS
Tetrakis(1-bicycloheptyl)chromium compounds are catalysts for the polymerization of 1-olefins when activated by the addition of an organometallic compound and/or exposure to light. The...
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3663391 |
SOLUTION POLYMERIZATION OF ETHYLENE BY IONIZING RADIATION IN THE PRESENCE OF CHLOROFLUORINATED HYDROCARBONS
Ethylene is irradiated with ionizing radiation under high pressure and in the presence of a chlorofluorinated hydrocarbon represented by the general formula Cn Fm Cl2n+2-m wherein n is 1 or 2 and m...
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3629998 |
POWDER POLYETHYLENE ADSORBENT
Powder polyethylene produced by polymerizing ethylene in a gaseous phase or in a liquid phase or a gas-liquid mixed system, where the liquid comprises a solvent or solvents in which the...
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3531389 |
TWO STAGE RADIATION POLYMERIZATION OF ETHYLENE IN THE PRESENCE OF A CARBON DIOXIDE MEDIUM
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3516912 |
RADIATION POLYMERIZATION OF ETHYLENE USING CARBON DIOXIDE AS REACTION MEDIUM
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3573183 |
IRRADIATION POLYMERIZATION OF ETHYLENE USING A TERTIARY BUTYL ALCOHOL MEDIUM
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3328379 |
Polymerization of olefins with radiation and an ammonia accelerator
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3271121 |
Ethylene-styrene copolymer as pour point depressant
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3231483 |
Polymerization of polyethylene in the presence of a metal oxide on an alumina catalytic support
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3196096 |
Method for the polymerization of olefins by ultrasonic vibrations
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3105024 |
Catalytic olefin polymerization method
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3047553 |
Polymerization process using polyfluoroazoalkanes as initiators
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3018236 |
Radiation induced ethylene polymerization
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3014799 |
Cross-linking of hydrocarbons
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2992980 |
Apparatus for radiation promoted processes
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2964458 |
Preparation of ethylene polymers
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2951796 |
Inorganic and organometal compositions
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