Abstract: Methods related to coextrusion of heat-sensitive polymer materials. The sensitive melt stream element (12) is encapsulated in a second polymeric melt stream element (16). Transport means (36) is preferably employed between the encapsulating means (20) and the die (42). A third melt stream element (68) is joined to one or both opposing surfaces (70) of the second melt stream element (16) between the encapsulating means (20) and the die (42). In the die (42) the encapsulated melt stream element (12) becomes an interior layer (46) between encapsulating layers (48A, 48B) derived from the second melt stream element (16). The third melt stream element (68) forms layers (72, 74) positioned outwardly of the encapsulating layers (48A, 48B). The positioning, on the interior of the extrudate, of edges (54) of layer (46) is adjusted independently of the combined thicknesses of a layer derived from the third melt stream element (68) and an adjacent layer (48).

Abstract: An Improved Oxygen Scavenging Polymer containing unsaturated carbon-carbon bonds, functions as an antioxidant when the unsaturated carbon-carbon bonds are triggered by the presence of moisture, wherein the unsaturated polymer contains one or more alkyl, alkenyl, or alkynyl groups or combinations thereof, and the polymer is used in articles.

Abstract: The compositions of the invention are hot melt urethane compositions for application in the molten star at temperatures of from about 121.1.degree.-232.2.degree. C. having viscosities of less than 50,000 cps which upon cooling form an elastomeric solid.

Abstract: Methods for injection molding and injection blow-molding multi-layer plastic articles, including containers and parisons for forming containers, which comprise providing a plurality of co-injection nozzle means for injecting plastic materials into associated injection cavities to form each article, providing streams of polymeric materials to form corresponding layers of the articles, moving each stream separately to plural nozzle means, separately receiving the streams in the plural nozzle means, and injecting the streams to form the multi-layer plastic articles. Preferably, each stream of material which is to form a corresponding layer of the articles is provided with substantially the same polymer flow, preferably from where each stream is split and moved to each nozzle means. Valve means can be employed in each nozzle means for positively controlling preferably substantially simultaneously the flow and nonflow of respective materials into the central channel of the nozzle means.

Abstract: Thermoplastic urethane elastomeric alloys are obtained by melt compounding at least one first component that is a polyurethane elastomer having at least one plasticizer reacted therein, this first component being formed by heating a reaction mixture comprising at least one isocyanate having a functionality of less than about 2.2, at least one long chain polyol, at least one chain extender and at least one plasticizer in specified amounts at a temperature of at least about 330.degree. F. (165.6.degree. C.), with at least one second component that is another thermoplastic elastomer not within the definition of the first component.

Abstract: The speed of a high-speed powered boat such as high-speed fisherboats can be increased even at the same power output of the engine irrespective of the speed by providing on each side symmetrically with a plural number of fins each opening outwardly toward the rear end making an angle with the boat hull in at least two high and low rows along the waterline which varies depending on the speed of the boat, whereby the wave-making resistance against the boat is greatly reduced at varied speed of the boat along with a stabilizing effect to decrease rolling. The effect of wave-making resistance suppression can be further enhanced by providing the bow of the boat with a stem-edge guard with right and left wings opening outwardly toward the side lines.

Abstract: Proposed is a novel vinyl chloride-based copolymeric resin suitable as an electron beam-curable binder resin for forming a magnetic recording layer of a magnetic recording medium. The binder resin is a vinyl chloride-based copolymeric resin containing monomeric units having a hydroxy group which is reacted with an ethylenically unsaturated monomeric compound having an isocyanato group in a molecule and then subjected to a modification reaction with an amine compound. The magnetic recording medium, e.g., magnetic recording tape, prepared by using the binder resin is excellent in the surface properties such as gloss and traveling resistance as well as in the magnetic properties such as residual magnetic flux density and squareness ratio of the magnetic hysteresis loop.

Abstract: There is disclosed an implant for anchoring in bone and/or fibrous connective tissue and to which a prosthesis such as a dental bridge may be connected through connecting components. The implant is of tapered design defining a wide top portion for connection to the connecting components and a tapered body comprising upper and lower regions. The lower bone-engaging region of the implant is provided with a porous surface into which bone may grow thereby anchoring the implant. The upper region of the implant has a surface suitable for bone attachment which is different from the surface of the lower region. In one embodiment, the upper portion has a larger taper angle than the rest of the implant for increased stability and stress transfer to the surrounding bone. In another embodiment, the surface of the upper region is coated with a bioreactive coating to allow direct bonding of bone and/or soft connective tissue (gingival tissue) thereby inhibiting epithelial migration apically.

Abstract: A polyurea resin having excellent mechanical properties along with high heat resistance can be prepared by the reaction of an aromatic polyamine component and an aliphatic polyisocyanate component, in which the aromatic polyamine component is a combination of a first aromatic polyamine compound which is typically a polyoxyalkylene bis(aminobenzoate) compound and a second aromatic polyamine compound selected from various classes of aromatic polyamine compounds different from the first aromatic polyamine compound in a specified weight proportion. The polyurea resin can be imparted with further improved heat resistance when the aliphatic polyisocyanate component is a combination of an aliphatic diisocyanate compound and a cyclic trimer of an aliphatic polyisocyanate compound in a specified weight proportion.

Abstract: The present invention relates to a catalytic composition for photopolymerization, which comprises an alpha-diketone and a hydrazone or a silane compound which has a silicon atom carrying a hydrogen, and also relates to a photopolymerizable composition which comprises a vinyl compound capable of radical polymerization and the above catalytic composition. The catalytic composition is markedly improved in photopolymerization activity and the photopolymerizable composition uniformly cures.

Abstract: A so-called Ziegler catalyst composed of a titanium halide-containing solid ingredient and an organoaluminum compound for the polymerization of olefins can be imparted with greatly improved storage stability by first subjecting the catalytic composition to a pre polymerization treatment and then to a contacting treatment with carbon dioxide and/or carbon monoxide. The catalytic activity is almost unchanged even after storage of the stabilized catalyst for 90 days or longer in nitrogen gas. The stabilized catalyst can also be used advantageously in a continuous-process polymerization of propylene by continuously introducing the monomer carrying the catalyst owing to absence of blocking of the pipe line with the polymer formed in-line.

Abstract: A method is proposed for the preparation of porous calcium carbonate particles of which each of the particles is not an aggregate but has ink bottle-shaped pores each not communicating with the others. The method comprises: (a) blending particles of heavy calcium carbonate having a specific particle size distribution with from 0.1 to 0.3% by weight of a porosity-forming agent, e.g., sodium chloride; (b) calcining the powder blend at a temperature in the range from 800.degree. C. to 1000.degree. C. to decarbonate the calcium carbonate particles into particles of calcium oxide having pores developed therein; (c) slaking the particles of calcium oxide with steam to convert the calcium oxide particles into particles of calcium hydroxide; (d) drying the particles of calcium hydroxide at a temperature in the range from 100.degree. C. to 350.degree. C.; and (e) carbonating the dried particles of calcium hydroxide with carbon dioxide gas at a temperature in the range from 600.degree. C. to 750.degree.C.

Abstract: An improvement is proposed for the removal of the precipitates of a phosphine oxide compound as a by-product from a mixture thereof with an olefin compound obtained by the Wittig reaction for the preparation of the olefin compound from a phosphorane compound and a carbonyl compound. Instead of the conventional procedure of filtration to remove the precipitates, the mixture in a hydrocarbon solvent, after replacement of a non-hydrocarbon solvent with a hydrocarbon solvent, if necessary, is admixed with a lower carboxylic acid such as acetic acid so that the precipitates of the phosphine oxide are dissolved forming a viscous fluid which is immiscible with the mixture of the olefin compound and the hydrocarbon solvent. The fluid containing the dissolved phosphine oxide compound can be easily removed by phase separation so that a great increase is obtained in the yield of the desired olefin compound.

Abstract: The water-swellable adhesive water stop of the invention is advantageous in respect of the improved workability and high water-stopping power as a consequence of the unique formulation of the rubber composition from which the water stop is prepared by shaping and vulcanization. The rubber composition comprises: (A) a butyl rubber; (B) a highly water-absorptive resin; (C) an inorganic water-absorbent; (D) a tackifier; (E) a plasticizer; (F) a vulcanizing agent; and, optionally, (G) a basic filler each in a limited amount relative to the component (A). The water stop is further characterized by a tensile strength in the range from 1 to 30 kgf/cm.sup.2, 100% elastic modulus in the range from 1 to 4 kgf/cm.sup.2, ultimate elongation at break of at least 300% and degree of swelling in water in the range from 150 to 500% by weight after immersion in water for 21 days at 23.degree. C.

Abstract: The present invention is to provide emulsion preparations for nasal administration containing calcitonins, which are safely and effectively administrated compared with the conventional calcitonin preparations. The emulsions are prepared by using a calcitonin as the active ingredient, an azacycloalkane derivative as the absorption promotor such as 1-[2-(decylthio)ethyl] azacyclopentan-2-one, and glycyrrhizic acid or its salt.

Abstract: A method for the solid-phase synthesis of peptides or proteins in high yield and high purity uses a solid-support consisting of a functionalized polystyrene-grafted polymer substrate, the grafted polystyrene chains being substantially non-cross-linked and having a chain molecular weight, not including optional non-reactive substituents, of at least 200,000, preferably in the range of 600,000-1,200,000. Particularly suitable polymer substrates are substrates of a polyolefin such as polyethylene. The method is particularly well-suited to the compartmentalized synthesis of a multitude of peptides or proteins in a parallel and substantially simultaneous fashion.

Abstract: Novel isothiuronium surfactant salts are useful as hair conditioning agents. Aqueous composition containing such salts, and method of using the salts are disclosed.

Abstract: A system and method for the operant conditioning of subjects using biofeedback includes means to measure a variable condition, such as posture, which is controllable by the subject. The apparatus sets criteria which, if not met, may result in a negative reinforcement, such as unpleasant audio tone or, if the criteria is met, will reward the subject. The criteria is automatically adjusted, upwards or downwards, in accordance with the subject's history of reaching, or not reaching, the criteria.The device includes a programmed microcomputer whose inputs include digital converters and which simultaneously adjusts the criteria and which controls the stimuli means, such as a tone generator and its speaker.

Abstract: Disclosed are novel adenine derivatives represented by the formula I and agriculturally acceptable acid addition salts thereof represented by the formula: ##STR1## wherein n is an integer of 2-4. Compositions for increasing yield of crops such as leguminous crops and gramineous crops which contain the above adenine derivatives or salts thereof as an active ingredient and methods for increasing yield of crops using these compositions are also disclosed.

Abstract: An acrylic rubbery polymer having remarkably improved cold resistance can be prepared by modification with an organopolysiloxane by the emulsion copolymerization of a monomeric mixture of two acrylic monomers, of which one is, for example, an alkyl acrylate and the other is an acrylic compound having, in a molecule, at least one ethylenically unsaturated group other than acrylic group in an aqueous emulsion of an organopolysiloxane having a substantial amount of mercapto-substituted monovalent hydrocarbon groups bonded to the silicon atoms.