Abstract: Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a desirable combination of physical and chemical properties. Crosslinked bulk materials are heated to a compression deformable temperature, and pressure is applied to change a transverse dimension of the material. After cooling and stress relieving, a treated bulk material is obtained that has enhanced tensile strength in the axial direction orthogonal to the dimension change. In preferred embodiments, medical implant bearing materials are machined from the treated bulk material with the in vivo load bearing axis substantially parallel or coincident with the axial direction of the treated bulk material.

Abstract: Compositions are provided that include an electron donor and a sensitizing compound. More specifically, the electron donor is an arylsulfinate salt. Methods of polymerization are also provided that can be used to prepare polymeric material from a photopolymerizable composition that includes ethylenically unsaturated monomers and a photoinitiator system. The photoinitiator system includes an electron donor and a sensitizing compound.

Abstract: A composition for preparing an electron emitter, an electron emitter produced by using the composition, and an electron emission device comprising the electron emitter are provided. The composition for preparing an electron emitter includes carbon-based materials and vehicles, wherein the vehicles comprise a polymer having a vinyl pivalate monomer. The composition for preparing an electron emitter improves a printing and a current-voltage characteristic simultaneously.

Abstract: The invention features a photopolymerizable composition that comprises a cationically polymerizable resin, and a photoinitiator system comprising an iodonium salt, a visible light sensitizer, and one or more anthracene-based compounds as electron donors. Electron donor combinations used in the invention include multiple substituted anthracene compounds or a combination of at least one substituted anthracene compound with unsubstituted anthracene.

Abstract: There are provided: a curable resin composition having a high exposure sensitivity and a good developing property, and thereby capable of forming an accurate and precise pattern; a liquid crystal panel substrate on which a protective film for covering a color layer or spacers for a liquid crystal layer, by using the curable resin composition, hardly causing a color irregularity and contrast irregularity; and a liquid crystal panel using the liquid crystal panel substrate and having a superior display quality. The curable resin composition of the present invention comprises: a copolymer (a) having a molecular structure in which a constitutional unit including an acidic functional unit and a constitutional unit including a photocurable functional group are linked at least; a photopolymerization initiator (b) having a tertiary amine structure; and a photocurable compound (c) having at least one acidic functional group and at least three photocurable functional groups.

Abstract: The present invention provides a novel photocurable composition containing an organic polymer having an epoxy group and/or oxetane group-containing silicon group at an end and a cationic photoinitiator. For example, the photocurable composition contains an organic polymer (A) having an epoxy group and/or oxetane group-containing silicon group at an end, and a cationic photoinitiator (B), the organic polymer (A) being produced by addition reaction between an organic polymer terminated with an unsaturated group and a hydrosilane compound having an epoxy group and/or an oxetane group.

Abstract: A lubricious composition suitable for use on medical device, the composition including at least one alkoxylated acrylate compound having at least two acrylate groups per molecule and at least one second component which provides lubricity.

Abstract: The invention relates to a radiation-curable liquid resin composition comprising: (A) 20-90 wt % of a urethane(meth)acrylate oligomer, and (B) 1-35 wt % of a monomer shown by the following formula (1), wherein R1 represents a hydrogen atom or a methyl group, R2 and R3 individually represent a hydrogen atom or an alkyl group having 1-4 carbon atoms, R4 represents a hydrogen atom or a methyl group, and n represents an integer of 1-6, or a monomer including a hydroxyl group.

Abstract: A composition that is photopolymerizable upon absorption of light in the wavelength range from 300 to 450 nm, the composition comprising a binder, a polymerizable compound, a sensitizer and a photoinitiator, characterized in that the sensitizer is an optical brightening agent having a solubility in methyl ethyl ketone of at least 15 g/kg measured at 20° C., allows to produce printing plates without pinhole defects, even if the printing plate precursor is stored before exposure and processing.

Abstract: A radiation curable coating composition comprising: (i) a thermoplastic polymer; (ii) at least one ethylenically unsaturated adhesion-promoting monomer or oligomer; (iii) at least one other ethylenically unsaturated radiation polymerizable reactant; and (iv) at least one initiator for initiating cure.

Abstract: Dental compositions and methods of curing the composition utilizing a light emitting diode (LED) curing unit. According to one aspect, a composition comprising a multiacrylate compound, an initiator including camphorquinone and at least one amine, and a colorless anti-yellowing agent produces a scratch free surface having no oxygen inhibited layer when cured with the LED curing unit.

Abstract: The liquid, uncrosslinked, UV-curable Michael addition resins and blends of the present invention exhibit performance properties that make them very effective coating materials and these properties can be modified greatly depending upon composition. Michael donors and acceptors can be constructed from Type I and/or Type II photoinitiators and can be included in the coating compositions disclosed to make UV-curable coatings with extraordinary photoreactivity and properties. Resins can be produced that show excellent adhesion to metals, plastics, wood, paper and glass. They exhibit wide ranges of hardness, toughness, flexibility, tensile strength, stain resistance, scratch resistance, impact resistance, solvent resistance, etc. Almost any desired coating performance parameter can be attained by proper selection of raw material building blocks.

Abstract: The present invention is directed to a photocurable and antistatic resin composition for coating an optical fiber, comprising (A) a photopolymerizable urethane acrylate oligomer, (B) a reactive monomer having at least one (meth)acrylate or vinyl group, (C) a photoinitiator, and (D) an antistatic agent compatible with the oligomer and monomer components, and optionally (E) a pigment or dye. The coating of the inventive composition can increase the productivity of the optical fiber, and provide an optical fiber having a uniform coating layer.

Abstract: Curable thiol-ene compositions containing urethane (meth)acrylate oligomers that are readily polymerized to produce optical articles and coatings are described.

Abstract: A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part. If applied to a finished polyethylene part, the irradiation and annealing must be accomplished with the polyethylene material not in contact with oxygen at a concentration greater than 1% oxygen volume by volume.

Abstract: A biocompatible, low-viscosity, radiation-curable composition for producing antimicrobial earpieces contains: a) 20-75 wt. % of one or a plurality of monomeric/oligomeric urethane(meth)acrylates having an acrylate functionality of <4, viscosity <30 Pa s, and molecular weight <3500; b) 5-45 weight % of a monomeric or oligomeric dimethacrylate of bisphenol A or bisphenol F and or of a monomeric aliphatic or cycloaliphatic di(meth)acrylate having a viscosity <6 Pa s; c) 2.5-25 weight % of a cross-linking monomeric or oligomeric component containing 4 methacrylate and/or acrylate functionalities; d) 0-15 wt. % of one or a plurality of monofunctional (meth)acrylates; e) 0.01-5 wt. % of one or a combination of antimicrobially active glass fillers and silver particles; and f) 0.5-6 wt. % of one or a plurality of photoinitiators whose absorption is in the wavelength range of an ND:YVO4 laser beam used or of an actinic radiation source used to promote free radical formation.

Abstract: A method of preparation of a cross-linked hydrogel by graft copolymerisation, said method comprises the steps of preparing an aqueous solution comprising one or more hydrophilic polymers, a cross-linking agent and a photoinitiator comprising a water-soluble peroxydisulphate, subjecting said solution to irradation and obtaining the cross-linked hydrogel, wherein the hydrophilic polymers are saturated and the cross-linking agent acts as a co-catalyst of cross-linking. The hydrogel is fast to produce and has low toxicity. The hydrogel may be suitable for use in medical devices such as dressings and the like.

Abstract: A method of forming a print medium having porous and swellable properties. The method includes providing a coating formulation that has at least 50% by weight of crosslinked organic particles. The crosslinked organic particles have a particle size of less than approximately 1 ?m. The coating formulation is then applied to a substrate. The crosslinked organic particles may be formed from polyvinylalcohol, polyvinylpyrrolidone, gelatin, polyester, polyamine, polyimide, starch, cellulose, polyethylene oxide, polypropylene oxide, and mixtures thereof. The crosslinked organic particles may be formulated to absorb at least two times their weight of water. A print medium utilizing the crosslinked organic particles is also disclosed.

Abstract: At least one embodiment of the present invention relates to an erasable ink composition particularly useful in a writing instrument for simultaneous the appearance of a graphite pencil. The composition of the present invention comprises a solvent system, a rubber and a pigment. The solvent system used in the present invention comprises an organic ester and a component selected from the group consisting of an optionally substituted cycloalkane, an optionally substituted cycloalkanone, an optionally substituted cycloalkene, or mixtures thereof. A sufficient amount of the solvent system is present so that the erasable ink composition will flow in a writing instrument. Preferably, the erasable ink composition of the present invention includes a pigment comprising graphite and carbon black. Finally, the erasable ink composition optionally includes a plasticizer, a liquid butene, or one or more additives selected from the group consisting of a corrosion inhibitor, a flow enhancing compound, and mixtures thereof.

Abstract: The present invention is refereed to a white solid photoinitiator in the form of powder and consisting of 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-phenoxy]-phenyl}-2-methyl-propan-1-one (COMPOUND1), and to the procedure for its preparation.