Abstract: Filter systems that are effective against a broad range of contaminants including HCN, cyanogen chloride (CK), acid contaminants. and basic contaminants such as ammonia without the need (but with the option, if desired) for using molybdenum or chromium containing materials. The filtering systems of the present invention include a tungsten-based material and other impregnants incorporated into a substrate such as filter media particles.

Abstract: Methods of fabricating optical elements that are encapsulated in monolithic matrices. The present invention is based, at least in one aspect, upon the concept of using multiphoton, multi-step photocuring to fabricate encapsulated optical element(s) within a body of a photopolymerizable composition. Imagewise, multi-photon polymerization techniques are used to form the optical element. The body surrounding the optical element is also photohardened by blanket irradiation and/or thermal curing to help form an encapsulating structure. In addition, the composition also incorporates one or more other, non-diffusing binder components that may be thermosetting or thermoplastic. The end result is an encapsulated structure with good hardness, durability, dimensional stability, resilience, and toughness.

Abstract: Filter systems that are effective against a broad range of contaminants including HCN, cyanogen chloride (CK), acid contaminants and basic contaminants such as ammonia without the need (but with the option, if desired) for using molybdenum or chromium containing materials. The filtering systems of the present invention include a tungsten-based material and other impregnants incorporated into a substrate such as filter media particles.

Abstract: Method of fabricating an optical element. A photodefinable composition is provided that includes (i) a hydrophobic, photodefinable polymer, said photodefinable polymer having a glass transition temperature in the cured state of at least about 80° C.; and (ii) a multiphoton photoinitiator system comprising at least one multiphoton photosensitizer and preferably at least one phtoinitiator that is capable of being photosensitized by the photosensitizer. One or more portions of the composition are imagewise exposed to the electromagnetic energy under conditions effective to photodefinably form at least a portion of a three-dimensional optical element.

Abstract: Filter medium includes at least two kinds of filter media particles. A first plurality of filter media particles includes an extended surface area substrate comprising at least one transition metal impregnant. A second plurality of filter media particles includes an extended surface area substrate comprising a tertiary amine impregnant. In preferred embodiments, at least one and preferably both of the kinds of filter media particles is/are substantially free of chromium, and more preferably contain no detectable chromium. The filtering medium has very broad filtering capabilities. The filtering medium successfully achieves performance levels mandated both by applicable industrial filter approval specifications and by international military filter performance specifications.

Abstract: A polymeric binder system useful for a magnetic recording medium, the polymeric binder system and comprising a hard resin component comprising a nonhalogenated vinyl copolymer and a soft resin component comprising a polyurethane having a phosphonate diester group. The binder system is useful for preparing the magnetic layer and/or backside coating of magnetic recording media, in order to provide media that demonstrate an improved combination of such as modulus, Tg, and smoothness.

Abstract: The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.

Abstract: Magnetic recording medium, comprising a magnetic layer provided on a nonmagnetizable substrate, wherein the magnetic layer comprises a magnetic pigment dispersed in a polymeric binder. The polymeric binder comprises a nonhalogenated vinyl copolymer, wherein the vinyl copolymer comprises a plurality of pendant nitrile groups, a plurality of pendant hydroxyl groups, and at least one pendant dispersing group. Preferably, the binder also includes a secondary polymer component.

Abstract: Magnetic media having a backside coating containing polymeric acrylate particles are provided. The polymeric acrylate particles are prepared from about 50-98 parts by weight of at least one kind of polymerizable di(meth)acrylate monomer of the formula:CH.sub.2 .dbd.CR.sup.1 C(O)O--X--O(O)CCR.sup.1 .dbd.CH.sub.2wherein each R.sup.1 is independently H (for diacrylates) or CH.sub.3 (for dimethacrylates) and X is a divalent branched or unbranched aliphatic or aromatic linking group; and about 2-50 parts by weight of at least one kind of polymerizable hydroxyl-containing monomer.

Abstract: A polymeric binder system useful for a magnetic recording medium, the polymeric binder system and comprising a hard resin component comprising a nonhalogenated vinyl copolymer and a soft resin component comprising a polyurethane having a phosphonate diester group. The binder system is useful for preparing the magnetic layer and/or backside coating of magnetic recording media, in order to provide media that demonstrate an improved combination of such as modulus, Tg, and smoothness.

Abstract: A data storage device of the type having a rotating member mounted on a shaft, said data storage device comprising a lubricant provided between the shaft and the rotating member, wherein the lubricant comprises (a) a linear, nonpolar polyether base oil having a glass transition temperature (T.sub.g) of about -110.degree. C. or less and an activation energy of flow (E.sub.a) of about 30 kJ/mol or less, and (b) an amount of a thickening agent sufficient to provide the lubricant with a grease-like consistency.

Abstract: A binder composition suitable for use with magnetic media comprising:(i) a phosphonated polyurethane having a plurality of units of the formula: ##STR1## wherein: the nitrogen atom forms part of the backbone chain of the polymer, andR.sup.1 and R.sup.2 independently represent members selected from the group consisting of alkyl groups of 1 to 5 carbon atoms, cycloalkyl groups and aryl groups of 6 to 10 carbon atoms or together R.sup.1 and R.sup.2 comprise the necessary carbon atoms to complete a ring, and(ii) a vinyl chloride copolymer having pendant ammonium functionalities.

Abstract: A compliant tape guide for magnetic tape transported in a belt driven data cartridge which resiliently engages one edge of a tape and urges the tape to a position against a fixed flange. The compliant tape guide includes a spring strip having a flange end and a spring finger to load the flange end against the tape. The compliant guide reduces tape edge wear as well as providing for better tracking of the tape.

Abstract: Magnetic recording medium of the type comprising magnetizable particles dispersed in a binder, wherein the binder comprises a star block copolymer having an average of at least six arms.

Abstract: A data storage device, of the type having a roller mounted on a shaft, wherein the roller has a central bore adapted to receive the shaft, and wherein a lubricant is provided between the shaft and the roller, the lubricant comprising a lubricant carrier, a plurality of fluorinated resin particles dispersed in the lubricant carrier, and a dispersing agent which is a copolymer of monomers, the monomers comprising a nonfluorinated monomer and a fluorinated monomer, such that the copolymerized dispersing agent comprises a plurality of nonfluorinated segments and a plurality of fluorinated segments.

Abstract: According to the method of making a magnetic coating material, 100 parts by weight of a magnetic metal powder, 1 to 10 parts by weight of fatty acid, 1 to 5 parts by weight of a dispersing agent, and a solvent are combined in the absence of a binding agent, wherein the solvent is present in sufficient amount to yield an admixture having a solids concentration of the magnetic metal powder in the range from 65 to 70 percent. The admixture is kneaded using a pressure kneader. The kneaded admixture is then blended with a binding agent to provide the magnetic coating material.

Abstract: A method of depositing a magnetic recording media coating onto a substrate, wherein the coating is substantially free of Benard Cells, the method comprising the steps of: (a) providing a dispersion comprising a polymeric binder, a pigment, and a solvent; (b) coating the dispersion onto a surface of the substrate; (c) drying the dispersion; (d) calculating values comprising .mu., .beta., and d representing the viscosity, temperature gradient, and wet caliper of the dispersion, respectively; and (e) during the course of carrying out steps (a), (b), and (c), maintaining the ratio ##EQU1## below a threshold value sufficient to substantially prevent the formation of Benard Cells in the magnetic recording media coating.

Abstract: A compact disc package made of double paneled paper board and including a base panel assembly and a cover panel assembly that are joined by an edge panel and will fold to overlie each other and to open by hinging at the edge panel. The base panel assembly formed such that the double walls of the base panel assembly are unattached in corner portions of such panel assembly and slots are provided to permit access to a space between the double walls. An insert, which is slightly smaller than the base panel assembly, is flexible such that its corner portions can be inserted through the slots into the spaces between the walls of the inner and outer base panels. The insert includes retainers for holding a compact disc in position on the base panel assembly while the cover panel assembly is hinged over the insert and a compact disc on the insert.

Abstract: A compact disc package made of paper board and including a base panel assembly and a cover panel assembly that are joined by an edge panel and will fold to overlie each other and to open by hinging at the edge panel. The base panel assembly is formed with an outer base panel and two inner base panel sections that fold inwardly from opposite edges of the outer base panel and form pockets for receiving an insert for a compact disc. The insert is flexible such that its corner portions can be inserted through the slots into the pockets formed panel. The insert includes retainers for holding a compact disc in position on the base panel assembly while the cover panel assembly is hinged over the insert and a compact disc on the insert.

Abstract: A drive belt for a belt-driven recording tape cartridge, wherein the drive belt has inside and outside major surfaces which comprise a plurality of bubble burst discontinuities. Processes for making drive belts with bubble burst discontinuities are also described.