Abstract: Bulk polymerization process for making radiation curable polyurethanes which comprises:(A) providing the following raw materials:(1) diisocyanate;(2) oligomeric diol>400 molecular weight; and(3) >1 chain extending monomer;(B) reacting the raw materials in a twin screw extruder under the following conditions:(1) molar ratio of isocyanate to hydroxy moieties of about 1;(2) ratio of chain extending monomer to other monomers sufficient to yield a polymer having chain extender incorporated at 0.1 to 10 weight percent;(3) extruder temperature sufficient to initiate and maintain reaction; and(4) residence time sufficient to obtain substantially complete reaction of diisocyanate;(C) cooling product polymer. Polyurethane product has weight average molecular weight greater than 80,000 and acrylate or methacrylate functionality. Process permits continuous production of radiation curable polyurethanes having narrow molecular weight distribution and high tensile strength.

Abstract: Two classes of certain compounds known as bis(thiazolinethiones), more particularly bis[(3,4-disubstituted)-thiazole-2-thiones], have thiazolinethione heterocycle units linked by alkylene, arylene, or arene groups or by a carbon to carbon single bond. These compounds are useful in the graphic arts because of their reduced volatility, reduced migrating aptitude, and reduced hydrophilicity compared to mono thiazolinethiones.

Abstract: Liquid toners are generally recognized as being capable of providing sharper electrophotographic images, but have been found to provide less than desirable results in multicolor imaging processes. The selection of a unique combination of (a) the ratio of conductivities between the toner liquid and the total toner composition, and (b) the zeta potential of the toner particles in the carrier liquid have been found to provide unique benefits to the quality of the liquid tone multicolor images.

Abstract: An electrofusion marker which fuses two pipe sections together and acts as a passive electronic marker. The electrofusion marker includes a tubular thermoplastic fitting having a coil therein, which is temporarily energized by a power supply. This heats the fitting, causing it to fuse with the pipe sections. The coil doubles as an inductor, and a capacitor connected in parallel with the coil creates a resonant LC circuit. After the pipe sections have been fused together and buried the joint may be thereafter located by emitting a signal into the ground, which is picked up by the resonant circuit and re-radiated. The radiated signal is detected by a receiver, indicating location of the electrofusion marker and joint.

Abstract: The present invention relates to orthopedic splinting articles and methods for forming orthopedic splints at least part way around an animal body part. The splinting articles comprise a unitary blank formed of an open-celled foam sheet impregnated with a water curable, isocyanate functional, polyurethane prepolymer resin. The blank is dimensioned to extend the length of the body part to be immobilized and to partially, but preferably not completely, extend around the circumference of the body part. Upon activation of the resin impregnated foam sheet and molding the same around the body part, an orthopedic splint is formed.

Abstract: 3-Aminoallylidenemalononitrile compounds corresponding to the formula: ##STR1## wherein R.sub.1 is a short alkyl chain having 1 to 3 carbon atoms and R is a substituted or unsubstituted long alkyl chain greater than 10 carbon atoms, are useful in photography for absorbing ultraviolet radiations in the range from 360 to 400 nm, with no undesired absorption near 420 nm, when introduced in a photographic gelatin layer.

Abstract: A package including containers having gabletops, wherein it is desired to maintain the containers in pairs, in separate areas, with support members to provide support for the gabletops from one side of the carton and identify the pairs of containers and separate them from other pairs of containers. The support members bridge the areas and are formed with panels adapted to engage the inclined roof panels of the gabletop containers and brace them from the wall of the carton to protect the ridge seal.

Abstract: A case for holding and dispensing small components such as orthodontic O-rings. Most of the component is fictionally or otherwise retained within the case, and only a small component portion extends from the case to be accessible to and grasped by the tips of a plier-like extraction tool. The case prevents the tool tips from closing over the entire component which would require component repositioning before placement.

Abstract: Normally tacky and pressure-sensitive adhesive, having excellent long-term adhesion to plasticized vinyl substrates, is prepared from a representative blend of dioctyl phthalate plasticizer and a copolymer of isooctyl acrylate, N-vinyl pyrrolidone, and acrylic acid; alternatives for each component are disclosed. In a preferred embodiment of the invention, the adhesive is coated in a thin layer on a sheet backing material to form a normally tacky and pressure-sensitive adhesive tape.

Abstract: Prior magnetic recording diskettes having a wiping fabric, edges of which register with edges of jacket openings, thus involving a hazard of loose fibers. In the novel diskette, the edges of the wiping fabric are out of registry with the edges of the jacket openings. This not only avoids the hazard of loose fibers, but a die with which the jacket is cut remains usefully sharp for at least twice as long as it would if used to die-cut a composite of the jacket material and fabric as in the prior art. Also, the punched-out pieces of jacket material are uncontaminated by fabric and so can be reused as scrap. Preferably, the wiping fabric is separated along the line at which the jacket blank is centrally folded to form an envelop for a recording disk. By eliminating fabric at the central jacket fold, surprisingly lower temperature has been necessary to form the fold, thus eliminating distortions in the jacket at the central fold.

Abstract: A light-occlusive self adherent eye patch is disclosed comprising an absorbent pad having a nonadherent lower surface, a backing having a lower face adhered to the upper surface of the pad and extending outward from the periphery thereof, a light-occlusive pressure sensitive adhesive coating on the lower face of the backing to adhere the patch to the eye socket, and a removable liner protecting the lower surface of the pad and the adhesive prior to use. The pressure sensitive adhesive blocks at least 95 percent of the light of a preselected wavelength impinging on the adhesive.

Abstract: A novel, fast-bonding adhesive composition is disclosed having low odor, and when cured, forms adhesive bonds having high glass transition temperature, T.sub.g, and high shear strength at elevated temperatures. The composition comprises one or more of acryl- and methacrylamides which have a cyclic group directly attached to the amide nitrogen or has the amide nitrogen as a member of a cyclic group. The composition further comprises a polymeric toughener that is dissolved or dispersed in the composition.

Abstract: Process for making particulate ceramics having an alumina rich region near their surface, comprising the following steps:(a) mixing and pelletizing, with the aid of water, raw materials including a mineral particulate such as nepheline syenite and a binder such as bentonite;(b) drying the wet pellets from step (a);(c) mixing the dried pellets with alumina parting agent; and(d) firing the mixture of pellets and parting agent at a sufficient temperature (less than 1450.degree. C.) and for sufficient time for vitrification to occur.

Abstract: A strip material (18) for forming an inductive loop (10) adapted to be applied to the surface of a roadway (12). The strip material (18) consists of and the loop (10) is formed from a ductile, flexible, flattened, extensible conductor (20) and a protective covering (22). A protective underlayment (24) is optional. The conductor (20) may be formed from a compressed, flattened metallic wire braid (28) or from a wire mesh containing 25% to 75% voids. The protective covering (22) may be formed from either combination unvulcanized elastomer precursor base sheet (30) and a vinyl based polymer support film (32), or a covering (26) selected from the group of epoxy, polyester, urethane and polyurethane.

Abstract: Cyanine dyes, particularly indocyanine dyes, having at least 7 carbon atoms in the polymethine chain which may possess a fused cyclopentene or cyclohexene ring in the form of a tri-iodide salt exhibit a substantial reduction in the propensity to associate compared to dyes having the identical cation but different anion. The tri-iodide salts are particularly useful as sensitizers in organic photoconductor systems.

Abstract: A disk cartridge for a rotatable recording disk includes a slidable shutter for providing access to the recording disk through the disk cartridge. A unique mounting for a return spring for the shutter allows the return spring to be of a maximum length which allows increased control of the forces generated by the return spring. The disk cartridge is further provided with a locking mechanism for preventing movement of the recording disk within the disk cartridge during storage.

Abstract: A retroreflective tubing adapted to be interwined among spokes of a wheel, comprising a core material, retroreflective microspheres attached to an outer surface of the core material, and a protective encapsulating material surrounding the microspheres. In a preferred embodiment, the cross section of the core material is U-shaped to maximize the retroreflective performance of the tubing, and the encapsulating material provides a multiplicity of sealed airspaces between the outer surface of the retroreflective microspheres and the inner surface of the encapsulating material.

Abstract: A liquid crystal display assembly for use with a reflective type overhead projector includes a liquid crystal display and an attached Fresnel reflector portion which is off-axis in that the center of the reflector is not included in the Fresnel reflector portion so that a spurious bright spot coinciding in the projected image with the center of the Fresnel reflector is eliminated.

Abstract: For use in making dental restorations, a model is prepared by taking an intra-oral impression and molding in the impression a replica model made from the thermosetting resin and a thermoplastic resin. The thermosetting resin provides a tough, heat- and abrasion-resistant surface. Heat from the molten thermoplastic resin accelerates the curing of the thermosetting resin.

Abstract: Microencapsulated materials are released by rupturing of an adhesive layer on a substrate containing the capsules.