Abstract: Method of and apparatus for supplying streams of molten glass including: a feeder with a chamber having an opening for supply of glass marbles for conversion to a molten body; a bottom wall for the chamber having orifices for discharging the molten glass as streams; means for heating the feeder; and a surface above the molten glass effective to reflect radiation so that reflected radiation is concentrated in a chamber where unmelted glass is present during melting.

Abstract: The present invention relates to the art of manufacturing glass fibers by the rotary process. A flow controller is located immediately downstream of the rotor means, stabilizing the fiber veil flow parameters. Mass addition to the boundary layer along the flow controller profile is employed to maintain the flow controller temperature and reduce the occurrence of fibers striking the controller.

Abstract: A longitudinally stretchable and transversely compressible member is made by coating each of a bundle of generally parallel, continuous, non-interengaged strands with a vaporizable material (blowing agent), applying a thermosetting elastomeric material to the bundle so as to impregnate and surround the bundle and to separate the strands. A vapor impermeable skin is formed on the surface and the vaporizable material vaporized to form randomly disposed voids and to cause the strands to take an undulating path.

Abstract: Glass fibers are coated with a size comprising emulsified particles of a prepolymer having an organo functional silane locked into the protective colloid layer surrounding the particles. In that state silane hydrolysis and polymerization is inhibited. The silane coated prepolymer particles have an overlay of an ethoxylated fatty alkyl radical. The size also contains a lubricant comprising emulsified particles of a white oil coated with a mixture of ethoxylated fatty alcohols, ethoxylated fatty acids, and a diethoxylated fatty amine. The water phase of the size involves a dissolved cationic silane, as for example, gamma-aminopropyltriethoxysilane and dissolved nonionic lubricant, as for example, an ethoxylated fatty acid. The preferred emulsifier for the prepolymer is a polyoxypropylene-polyoxyethylene adduct. The size is made by adding an organo functional silane monomer to the emulsion of the prepolymer so that the silane adds to the oil phase.

Abstract: Rigid polyurethane foams are disclosed which comprise urea-modified resole-based polyols.

Abstract: We have developed molding compounds from cement in combination with a nylon or polyester resin. We form the resin in the presence of the cement. We can use these molding compounds to form molded articles which have good fire resistance.

Abstract: A glass melting furnace in which glass can be heated by sources below its upper surface, as electrically by Joule effect, and by means above its upper surface, as by fossil fuel firing or by heat reflectors. A cold top melting mode is employed in the charging region of the furnace while the glass discharge region maintains an exposed molten, upper surface on the glass. In a disclosed embodiment a high crown over the charging region enables cold top melting and refining to be accomplished by Joule effect while flues and burner ports in that region are closed. A low crown, which may be adjustable in its height above the glass line, is provided over the discharge region to increase heating at the exposed, molten upper surface of the glass by reflection. Heating in the discharge region can be augmented by above surface heaters distributed across the crown. A flue in the discharge region carries gases from that region.

Abstract: A method for determining the degree of cure of glass fibers coated with a heat-cured polymeric material wherein the coated glass fibers are contacted with water at an elevated temperature for a time sufficient to extract watersoluble carbon material from the heat-cured polymeric material, and the resulting extract is subjected to analysis to determine the carbon content of the extract. It has been found that the carbon content of the aqueous extract is inversely proportional to the degree of cure of the polymeric material.

Abstract: Halogen and amine groups attached to silicon are replaced by organocarboxylate groups. The replacement is carried out with the reactants dissolved in pentane. Substantially quantitative yields are obtained, and the reaction can be preceded or followed by other reactions carried out in the pentane media. For example, trichlorosilane is reacted with an olefinic unsaturate containing halogen in a first stage reaction. Thereafter the product of the reaction is reacted with an organic acid so that the chlorines attached to the silicon are then replaced by the organocarboxylate groups in a second stage reaction. The remaining halogen is then replaced by amine in a third stage reaction, all in the pentane media. All this is accomplished without an HCl scavenger.

Abstract: A pollution control system for reducing the presence of fine aerosol particles in stack gases from the manufacture of glass fiber wool-type products. After larger particles are removed from the forming fan gas, the gas is fed into a centrifugal fan and massive quantities of water are injected into the fan intake. The aerosol particles are agglomerated by impact with the airborne water droplets and the wet surfaces of the fan. The larger, coalesced or agglomerated particles are more readily susceptible to inertia-type separation from the air by either the action of the fan or in a later separation operation. It has been found that 1.5 or more gallons per minute (gpm) of injected water per thousand standard cubic feet per minute (scfm) of forming gas passing through each fan is effective to remove more than 40% of the fine, aerosol particles introduced into the fan and even larger amounts of water remove greater amounts of such particles.

Abstract: This disclosure relates to fiberizable glass compositions, fibers and the method of making textile glass fibers which are boron and fluorine free. Boron and fluorine have now been recognized as potential pollutants in the manufacture of fiberizable glasses and glass fibers and the following disclosure eliminates these pollutants by substituting TiO.sub.2, MgO and ZnO in the basic three component glass composition of SiO.sub.2, Al.sub.2 O.sub.3 and CaO. The preferred glass composition consists essentially of, by weight, 54.5 to 60% SiO.sub.2, 9 to 14.5% Al.sub.2 O.sub.3, 17 to 24% CaO, 2 to 4% TiO.sub.2, 1.5 to 4% MgO and 1 to 6% RO, wherein RO is an oxide selected from the group consisting of ZnO, SrO and BaO, calculated as ZnO. The preferred composition may also include alkali metal oxides selected from the group consisting of Na.sub.2 O, K.sub.2 O and Li.sub.2 O.

Abstract: Low pressure molding compounds comprising a thermosetting resin and a thermoplastic resin are gelled with calcium hydroxide within a specific concentration range to produce compounds moldable at low pressures.

Abstract: A feeder for delivering streams of molten mineral material for attenuation into filaments having an electrically conductive bottom wall with orifices formed therein. The molten material in the feeder passes through the orifices and is delivered as streams for attenuation into fibers. Extending from the bottom wall, in a direction generally normal to the plane of the bottom wall, are electrically conductive side and end walls. Positioned within the feeder generally parallel to the plane of the bottom wall is a molten material conditioning means. On the exterior surface of each of the end walls there is a terminal for conducting electrical energy to the feeder to heat the walls and molten material conditioning means of the feeder and thereby condition the molten material in the feeder. Each of the terminals has an inner portion attached to the end walls at the location of the molten material conditioning means. The inner member is positioned so that it is generally parallel to the plane of the bottom wall.

Abstract: A resinous article and method for making the article wherein a body of fibrous reinforcing material and syntactic foam containing a low density filler are placed in a molding and curing chamber with the reinforcing material in contact with the surface of the chamber. A molding pressure is then exerted on the chamber to mold and cure the body of material into a finished article. The pressure exerted being sufficient to force a portion of the resinous material in the syntactic foam through the reinforcing material to form a resin rich surface on the article. However, the low density filler material is retained within the core area of the article by the reinforcing material and forms a lightweight syntactic foam core. The resulting article has an outer skin, a layer of fibrous reinforcing material beneath the skin and bonded to the skin, and a core of lower density syntactic foam.

Abstract: A porous article with a special finish treatment is provided, the article typically being an article of furniture, such as a cabinet door, by way of illustration. The article can be made of a molding compound comprising discrete glass fibers which can be produced by milling cured phenolic-bonded glass fibers. A coupling agent or binder is added to the milled fibers and the combination formed and cured under heat and pressure into the shape of the article. The surface of the formed article is porous and, in fact, the article is porous throughout its thickness. This presents a substantial problem in applying a satisfactory finish. To overcome this, with the article at an elevated temperature, it is immersed in a liquid containing particles in suspension, i.e. polyester liquid containing talc.

Abstract: The pipe insulation includes two semi-cylindrical pieces of insulating material secured by adhesive in a controlled pattern to an outer jacket or cover having a longitudinally extending overlapping flap. One strip of adhesive material with self-sealing adhesive on both sides is adhesively secured on one side to the inner side of the flap and another strip of adhesive material with self-sealing adhesive on both sides is adhesively secured on one side to the portion of the cover overlapped by the flap. The other side of each strip of adhesive material is provided with a protective paper covering during shipment and storage. When the pipe insulation is installed, the paper coverings are peeled off and the two strips of self-sealing adhesive material are pressed together.