Abstract: A method for repairing pipes laid underground, such as gas pipes, consisting of a main supply pipe from which numerous distribution pipes branch off to supply the individual users, the method using resin to repair the main supply pipe and the distribution pipes from the inside while in their buried state.The repair method of this invention is characterized by the fact that, having repaired the main supply pipe and the distribution pipe in successive operations, whether the repairs to the main supply pipe and the distribution pipes have been done properly or not can be confirmed on completion of the repairs by carrying out sealage tests on the distribution pipes and the main supply pipe.

Abstract: A method of repairing a damaged electrode surface comprises coating the damaged area with a polyhaloolefin. The coated area is cured, for example, by heat or radiation and the cured coating bonds the damaged area to the surrounding electrode surface.The method of the invention permits the "in situ" repair of electrode surfaces while preventing distortion of the electrode surface or its support members.

Abstract: A pipeline needing leakage repair and/or prevention is filled with a liquid sealant in foamed state of the aqueous emulsion type. Then an excess amount of the sealant in the center of the pipeline is drained from the pipeline, and the sealant remaining on the interior wall of the pipeline is allowed to cure wherein the sealant contains fine particles of inorganic oxide weakly adhering to one another into aggregations, said aggregations easily breaking into such fine particles that they can enter and plug fine cavities of the interior of said pipeline.

Abstract: Polyester compositions containing dicyclopentadiene, maleic acid and a compound containing at least one alcoholic hydroxy group, the polyester formed by a two-stage process. In the first stage, maleic acid and dicyclopentadiene are heated to form an intermediate reaction product. In the second stage, the intermediate is heated with a compound containing at least one alcoholic hydroxy group to form the polyester. The compositions containing this polyester and a diluent have good adhesion to metal and plastic substrates, and are useful as automobile body putty primers. These polyester compositions exhibit good adhesion in corrosion-inducing environments, and are useful to protect against further corrosion.

Abstract: A method of sealing a porous heating or cooling jacket of a reactor vessel includes the steps of: (a) draining the heating or cooling fluid from jacket; (b) washing and drying the interior of the jacket; (c) filling the jacket with a curable liquid sealant composition under pressure sufficient to cause the composition to permeate the porous areas in the jacket but insufficient to burst the jacket, the composition being curable at temperatures between about 75.degree. C. and 100.degree. C.; (d) draining the sealant from the jacket; and (e) heating the jacket to or above the cure temperature of the composition and maintaining that temperature for sufficient time to ensure total polymerization of the reactant composition.

Abstract: A composition comprising 100 parts of an elastomer selected from the group consisting of EPDM, butyl rubber and a EPDM-butyl rubber mixture; 0.1 to 3.0 parts of a compound having the structural formula [(CH.sub.2).sub.n NCS].sub.2 S.sub.6, where n is 4 or 5; and 0 to 0.5 parts of a sulfur donor curative is disclosed. The composition has particular application as roof sheeting or flashing.

Abstract: A photomask with white defects that have corrected with a film comprising a mixture of silver and tantalum oxide. The film has a good resistance to chemicals.

Abstract: A method for coating a metal surface by forming a corrosion-protective layer on the metal surface or a defective area of a corrosion-protective layer formed on the metal surface, which comprises using a coating material selected from the group consisting of a tape-like, sheet-like and chip-like polymerizable coating material comprising a vinyl monomer and/or a vinyl group-containing oligomer and a liquid material comprising a vinyl monomer and/or a vinyl group-containing oligomer, wherein either the coating material or the liquid material contains a polymerization initiator and the material not containing the polymerization initiator contains a polymerization accelerator, and polymerizing the vinyl monomer and/or the vinyl monomer-containing oligomer in the state such that the metal surface or the defective area is covered with the coating material by interposing the liquid material therebetween, to form the corrosion-protective layer.

Abstract: A method for maintaining and/or repairing a protective coating on the surfaces of at least one component in a high temperature zone of an engine during operation thereof wherein selected additives are employed in the engine's fuel.

Abstract: A method and apparatus for repairing defect portions of a photomask. A complex material from which a light shading material can be deposited is applied over the photomask. A white (blank) defect region is irradiated with a continuous wave laser light beam projected in a slit-like light image to thereby convert the complex material into the shading material. After washing, a half-deposited portion formed in a peripheral portion of the light shading region is further deposited by a post-baking process. Those portions of the light shading film which depart from the desired mask pattern are removed together with black (solid) defect portion originally present in the photomask through irradiation with a pulse laser light beam. The pulse laser is constituted by a Dye-laser, while the continuous wave laser is constituted by an Ar-laser. A specific half-mirror which transmits therethrough Ar-laser light while reflecting Dye-laser light is displaceable provided.

Abstract: A method and apparatus for correcting transparent defects on a photomask are disclosed. A metal-organic complex solution is applied to a transparent defect portion and its periphery on the photomask. The transparent defect portion is then exposed to a visible ray or ultraviolet ray to deposit a metal, a metal oxide or a composition thereof, while the light transmission quantity through the transparent defect portion is measured. After the measurement falls below a predetermined level relative to the quantity of the transmitted light at the start of exposure, the exposure is terminated to thereby complete the correction of the transparent defects.

Abstract: A method of applying an intermediate bond coat on a laser mirror substrate is described comprising surface polishing the mirror substrate followed by depositing a layer of amorphous silicon, amorphous germanium, or mixtures thereof on the mirror surface, and polishing the thus coated mirror surface to a substantially void-free surface finish. Laser mirror substrates such as graphite fiber reinforced glass, molybdenum and silicon carbide coated by such process are also described.

Abstract: A one step method of applying a sealant onto the inside surface of a pipe, such as a gas pipe, to repair any defective portions that are likely to cause a leak and should be repaired. The sealant is applied and it is then dried and solidified to seal the leak portions of the pipe. Preferably, an injection means is used for supplying the sealant in a cylindrical shape so that every portion of the inner surface of the pipe will be coated.

Abstract: An acrylic coating composition suitable for use as an automotive refinish lacquer comprises a mixture of(a) a solution in volatile organic solvent of an acrylic copolymer of 75-90% methyl methacrylate, 1.5-6.0% dimethylaminoethyl methacrylate and 8-23.5% of butyl acrylate, butyl methacrylate or lauryl methacrylate, the copolymer having a Tg of 80.degree.-95.degree. C.;(b) a solution in volatile organic solvent of cellulose acetate butyrate, the cellulose acetate butyrate having a viscosity of 0.5-5 sec and a hydroxyl value of 2 maximum; and(c) a monomeric ester plasticizersuch that the non-volatile constituents of (a), (b) and (c) comprise respectively 43.5-64.0%, 15.0-25.5% and 21.0-31.5% of the total weight of non-volatile material of (a) plus (b) plus (c).

Abstract: A method of repairing an intermediate amorphous silicon and/or germanium bond coat on a laser mirror substrate is described. The initial coating is put down by polishing the mirror substrate followed by depositing a layer of amorphous silicon, amorphous germanium, or mixtures thereof on the mirror surface, and polishing the thus coated mirror surface to a substantially void-free surface finish. A layer of oxide of silicon or germanium is deposited on the thus formed coating either during, after, or in sandwich fashion during the formation of such intermediate bond coat. The intermediate coating can be surface polished back to the original amorphous layer or the oxide can remain on the surface after polishing.

Abstract: Method and apparatus for the metallization of support members, such as paper sheeting and other cellulosic products. A metallic film is transferred to the paper support from a plastic sheet carrier and adhered to the paper by a thermoplastic material. The carrier, typically of stabilized plastic with an adhered film of metal and an overlay of thermoplastic adhesive with the paper support. Pressure and/or heat is applied to the composite which is subsequently cooled and the carrier stripped away to leave the desired metallic layer on the receiving surface of the paper support.This transfer procedure overcomes the objections associated with metal foil laminates and is particularly suitable for metallizing support members, like paper, which are difficult to metallize directly because they release significant amounts of vapor during conventional vacuum metallization.

Abstract: In a preferred embodiment, a method is presented for filling depressions in fabricated steel surfaces by applying a metallic body solder consisting of 14 to 20 weight percent copper, 1 to 7.5 weight percent zinc, 0.5 to 1.5 weight percent iron and the balance tin. The body solder alloy is heated to form workable thixotropic paste that is applied with spreading onto the steel surface. Upon cooling, the body solder forms a dense, tightly adherent fill that is grindable and paintable in conjunction with the surrounding steel surface.

Abstract: Leaks in a vessel or pipeline or the like, adapted for containing a fluid, are sealed by means of a volatilized polymerizable organosilane comprising a mercaptosilane, an acyloxysilane, or an alkoxysilane taken on conjunction either with acetic acid anhydride or an amine, or mixtures thereof, the organosilane being supplied to the interior of the vessel or pipeline under sufficient pressure and for a sufficient period of time to permit contact and chemical reaction thereof in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: Dual coated erosion resistant metal or ceramic structures are provided having an interior adherent indicating metallic or ceramic layer containing a UV sensitive phosphor and an exterior ceramic or metallic protective coating. A method of making such dual coated structures also is provided involving the plasma or flame spraying of blends of particulated metal powder or metal oxide powder and a metal oxide UV sensitive phosphor onto the surface of the metal or ceramic structure.

Abstract: A coating for hulls of ships to be applied underwater to areas of the hull not accessible when ship is in dry dock. The means for applying the coating may take several forms: (1) a multilayered tape system having impregnated in or carrying an antifoulant and having an adhesive tape operable underwater on one side; (2) a sponge like layer having an antifoulant paint or coating liquid which can be squeezed onto the hull; (3) the use of a water soluble sponge having mixed therein microspheres of resin and pigment and microspheres of activator material such that when the microspheres or crushed, the pigmented resin, which may contain an antifoulant, and the activator are mixed and cured to form a coating on the hull while the sponge material will dissolve away when exposed over its surface to seawater.

Abstract: Leaks in a vessel or pipeline or the like adapted for containing a fluid, are sealed by means of a volatilized polymerizable aminosilane supplied to the interior of the vessel under sufficient pressure and for a sufficient period of time to permit contact thereof and react in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: The pretreatment of an epoxy resin substrate for electroless copper plating comprises the steps of subjecting the epoxy resin substrate to a treatment with an aqueous solution including a chloride of iron and then subjecting the substrate to a treatment with an aqueous solution of a water soluble peroxide before sensitizing the epoxy resin substrate for electroless copper plating.

Abstract: This invention relates to a process for the insulation of original paint layers, particularly for the application of new paint layers thereover, comprising applying over the original paint to be insulated a barrier layer of a film-forming composition comprising a dicarboxylic acid- and diamine based polyamide resin in alcoholic or aqueous-alcoholic solution, and allowing the resulting protective coating to dry.This process is particularly applicable to the repair of vehicle bodies.

Abstract: This invention relates to the process of repainting a vehicle surface to give controlled depth of color and high image reflection, comprising preparing the surface for reception of a color coating, applying at least one coat of an acrylic enamel color coating onto said prepared surface, drying said color coating, applying an acrylic clear paint inter-mix finish coat over the color coat, and drying said finish coating, said color coating being a mixture of an automotive acrylic enamel, acrylic thinner, and acrylic clear paint designed for inter-mixing in the formulation of a color coating in amounts to give a DuPont cup viscosity reading of between about 16 to 21 seconds at 125.degree. F., and said color coating and finish coating being heated to a temperature of about 115.degree.-135.degree. F. just prior to application.

Abstract: Repair of opens and shorts in semiconductor packages and chip metallurgy by initial conversion of shorts into opens by severing of lines about the shorts, followed by interconnection of conductor patch lines to the good circuit portions through an insulating layer.

Abstract: Seafood pots made of wire mesh netting are prepared for galvanizing by first passing them through an incineration chamber to burn, melt and loosen foreign material thereon, and then passing them through a high pressure liquid spray to remove residual burned matter and loosened foreign material. The pots are then ready to be passed through the steps of the galvanizing process, which includes dipping the pots into heated preflux before they are dipped into molten zinc. An inverted drying chamber bridges the distance between the preflux tank and the zinc kettle, through which the seafood pots are moved by conveyor means to dry the preflux, with drying heat within the chamber being drawn from the tank and the kettle. The seafood pots are vibrated as they are withdrawn from the molten zinc to effect an even coating of zinc on the wire mesh netting thereof.

Abstract: A method is disclosed for depositing a thick layer of copper upon a copper base wherein the base is heated and flame sprayed with molten copper until globules are observed. The globules are mechanically removed from the base and the flame spraying and globules removing steps repeated.

Abstract: Methods of restoring or repairing damaged areas in the coating of high performance reflective glass composed of a thin, transparent film such as a metal and/or a metal oxide deposited on a vitreous substrate. Damages to the film such as scratches, abrasive rubs and the like are covered with a compatible filler to substantially restore the light transmittance characteristics. The repaired areas are covered with a protective coating to increase their durability.

Abstract: In the preferred embodiment, a method is presented for filling depressions in fabricated steel surfaces by applying a metallic body solder consisting of 15 to 20 weight percent copper, 2 to 3 weight percent zinc and the balance tin. The body solder alloy is heated to a temperature above about 210.degree. C. to form a workable thixotropic paste that is applied with spreading onto the steel surface. Upon cooling, the body solder forms a dense, tightly adherent fill that is grindable and paintable in conjunction with the surrounding steel surface.

Abstract: Leaks in a vessel or pipeline or the like adapted for containing a fluid, are sealed by means of a volatilized polymerizable aminosilane supplied to the interior of the vessel under sufficient pressure and for a sufficient period of time to permit contact thereof and react in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: This application discloses a composition and a method for catalyzing and crosslinking of a polyepoxy compound and an acrylic resin containing carboxylic acid groups, the catalyst being in the form of a metal chelate, particularly of manganese, zinc or chromium. The compositions, when substantially freed of volatile solvent and adjusted to a viscosity resembling that of gunnable caulking compositions, are particularly well adapted as a replacement for the metallic body solder used in automobile manufacture to fill out imperfections, welded joints and the like, when applied thereto and cured.

Abstract: A method of filling a cavity in a substrate which comprises applying excess adhesive composition as a hot melt into the cavity, spreading the adhesive composition to fill the cavity, cooling the adhesive composition and sanding the composition to provide a surface even with the surrounding substrate. The adhesive composition comprises a block copolymer, aluminum powder and glass fiber. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above about 150.degree. C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments. The weight ratio of block copolymer to aluminum powder and glass fiber is in the range of about 3:7 to about 3:2, the weight ratio of block copolymer to glass fiber is at least about 2:1, and the weight ratio of glass fiber to aluminum powder is at least about 1:9.

Abstract: A sleeve assembly for sanding, rust removing, and pit filling on a piston rod of a hydraulic cylinder or the like includes a sanding component, a rust removing component and a pit filling component. The sanding component comprises a rigid annular outer member, a resilient annular intermediate member adhesively secured to the inner surface of the outer member, and an abrasive annular inner member adhesively secured to the inner surface of the intermediate member and in interference contact with the piston rod. The rust removing component comprises an annular upper ring member composed of a rigid material and an elastomeric annular lower C-ring member having brass or bronze particles imbedded therein. The pit filling component comprises an annular upper ring member composed of a rigid material and an elastomeric annular lower C-ring member having lead particles imbedded therein. Clamp means releasably engages the members of each of the components about the piston rod.

Abstract: A method of filling a cavity in a substrate which comprises applying excess adhesive composition as a hot melt into the cavity, spreading the adhesive composition to fill the cavity, cooling the adhesive composition and sanding the composition to provide a surface even with the surrounding substrate. The adhesive composition comprises a block copolymer, a particulate mineral reinforcing agent, glass fiber and hollow inorganic silicate microspheres. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above about 150.degree. C. and having from about 30 to about 70 percent of hard segments and from about 70 to about 30 weight percent of soft segments.

Abstract: A method of filling a cavity in a substrate which comprises applying excess adhesive composition as a hot melt into the cavity, spreading the adhesive composition to fill the cavity, cooling the adhesive composition and sanding the composition to provide a surface even with the surrounding substrate. The adhesive composition comprises a block copolymer, a particulate mineral reinforcing agent and glass fiber. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above about 150.degree. C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments.

Abstract: A method of filling a cavity in a substrate which comprises applying excess adhesive composition as a hot melt into the cavity, spreading the adhesive composition to fill the cavity, cooling the adhesive composition and sanding the composition to provide a surface even with the surrounding substrate. The adhesive composition comprises a block copolymer, aluminum powder, glass fiber and hollow inorganic silicate microspheres. The block copolymer is selected from the group consisting of copolyesters, coplyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above 150.degree. C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments.

Abstract: Described is a masking tape adapted for use in defining a selected portion of a surface for refinish spray painting wherein the masking tape is applied to a peripheral portion of the selected surface portion with a lateral portion of the tape being angled upwardly from the surface to form an included angle within the range of approximately 15.degree. to approximately 45.degree.

Abstract: A method of repairing pin holes in a defective photomask such as one comprising a patterned chromium film on a glass substrate comprises depositing an adhesion promoting film such as siloxane on the surface of the photomask, then depositing a solvent soluble layer such as a photoresist layer over the adhesion promoting layer, a window is then formed through the layers and underlying photomask in the area of the pin hole by burning through these layers by means of a laser. The exposed areas of the window are etched and a metallic film is deposited over the exposed surfaces. Finally, the photomask is treated with solvent for removing the solvent soluble photoresist which also causes the metal film deposited thereon to be removed in all areas except the area of the window.

Abstract: A method of surfacing mill guide rolls 1 in which a metallic powder (6) is deposited on to the surface of the rotatable roll by flame, arc or plasma spraying, fusion welded and then shaped and compacted while in a plastic condition by a roll former 7 rotatable and engageable with the guide roll whereby to impart thereto a surface in conformity with the profile of the former.

Abstract: The invention contemplates a method and means for making a dryer or the like roll having a ferrous metal surface provided with a surface coating of a hardfacing alloy, the ferrous metal surface having a thermal conductivity relative to silver taken as 1 cal/cm.sup.2 /cm/.degree.C./sec of at least about 0.06 the hardfacing alloy being a hardfacing heat, corrosion and wear resistant iron-group metal-base alloy mechanically and metallurgically bonded to said ferrous metal surface which is preferably made of cast iron, the hardfacing alloy coating having a thickness ranging from about 0.01 to 0.15 inch, the thermal conductivity of said coating being at least 0.05.

Abstract: Improvements are disclosed in the method of electroless deposition of a metal on a nonconductive surface wherein the surface is sequentially contacted with a tin salt solution, a palladium salt solution, and an electroless plating bath containing said metal. The improvement relates to preparing the surface to produce an unbroken layer of water adhering thereto upon dipping said surface in deionized water. The improvement further contemplates removing the surface from the electroless plating bath after formation of the visible amount of metal, inspecting the surface for imperfections, removing the metal, and recleaning the surface to remove imperfections. Finally, the activation steps are repeated followed by contacting the surface with an electroless plating bath to plate the desired quantity of metal thereon in a manner wherein uniformity and adhesion are improved.

Abstract: A method of refurbishing vane or blade components. Used turbine vanes or blades are cleaned, annealed and in some cases slotted adjacent their ends, after which any cooling passages (in the case of vanes) are welded closed and all cracks welded over, on both leading and trailing edges. The trailing edge, for a vane or blade component having a short chord, is built up by welding along its full length with an alloy wire, after which any slots that were cut adjacent the ends are closed, also by welding. Then the worn surfaces of the vane or blade are built-up by a plasma spray process, using a metal powder with added silica, to a thickness which can be as great as 30 to 40 thousandths of an inch. The built-up vane or blade is then sintered and thereafter surface finished to conform to the original contour of the component when new. Any cooling holes are finally recut, and the vane or blade polished as required and inspected.

Abstract: This application discloses a composition and a method for catalyzing and crosslinking of a polyepoxy compound and an acrylic resin containing carboxylic acid groups, the catalyst being in the form of a metal chelate, particularly of manganese, zinc or chromium. The compositions, when substantially freed of volatile solvent and adjusted to a viscosity resembling that of gunnable caulking compositions, are particularly well adapted as a replacement for the metallic body solder used in automobile manufacture to fill out imperfections, welded joints and the like, when applied thereto and cured.

Abstract: A composition comprising a liquid polymerizable resin and an alloy of iron and silicon, known as ferrosilicon, for use as a metal repair or reclamation material. The invention also includes a two-component pack including the liquid polymerizable resin as one component and a catalyst or hardener therefor as the other component, ferrosilicon being present in one or both components.

Abstract: The sealant composition comprising radial teleblock copolymers or hydrogenated linear or radial teleblock copolymers, an epoxy resin and a modifying resin exhibit good canvas peel strength.

Abstract: A solder for filling or padding operations on automobile bodies, consisting essentially of 2.0-7.0 Wt% antimony, optionally less than 5.0 Wt% of tin and the balance of lead. This solder is inexpensive and exhibits good physical properties at high temperatures principally due to its high solidus temperature of above 240.degree. C. The use of this solder is particularly advantageous when the filling or padding operations are preparatory to a surface coating operation in which a high baking temperature is employed for hardening enamel paint or varnish.

Abstract: A method and apparatus for providing an improved hot filament, arc type ion source is disclosed. The arc type ion source utilizes a filament having a carburized surface layer and/or means to provide a hydrocarbon gas containing atmosphere about said filament. The method includes providing an atmosphere containing a hydrocarbon gas about said filament so that the filament can be continuously carburized as part of the ion source.

Abstract: A method of filling cavities with a hot melt adhesive composition. The adhesive composition comprises a block copoly(ester-amide) containing crystalline polyester and amorphous polyamide segments and a finely divided spheroidal metal. The weight ratio of poly(ester-amide) to metal is in the range of 70:30 to 30:70. The adhesive composition is applied as a hot melt to fill a cavity in a substrate and is sanded smooth to provide a surface which accepts paint.

Abstract: A contact fuser assembly for use in an electrostatic reproducing apparatus including an internally heated fuser roll structure comprising a rigid, thermally conductive core which is coated during operation of the assembly with a thin layer of a normally solid thermally stable material with subsequent application of a liquid release agent to the coated core. In the preferred embodiment of the invention the coating material comprises a fluorocarbon telomer such as Vydax 1000 and the liquid release agent comprises a liquid silicone oil.

Abstract: The posts of electrical storage batteries are treated with an aerosol of a halogenated hydrocarbon propellant and mineral oil to remove oily residues and corrosion scale therefrom and to protect the posts against reappearance of scale and corrosion thereon.