Showing papers on "Coating published in 1975"

Decorative sheet material

Abstract: A sheet material having a decorative surface and a working surface, for application to a support surface is disclosed, the working surface of which is provided with a continuous coating of tacky, pressure-sensitive, adhesive, which adhesive is provided with a coating of a discontinuous layer of resilient, non-adhesive particles. The coating of particles have the ability to be deformed under a load and thus, upon application to a support surface, deform, under pressure, to such an extent as to bring the adhesive and the surface into fuller contact.

Process for electrodepositing cationic compositions

Abstract: It has been found that aqueous coating compositions comprising a blocked organic polyisocyanate, an amine adduct of an epoxy group-containing resin, and optionally a catalyst for urethane formation can be electrodeposited. These compositions deposit on the cathode to provide coatings having excellent properties.

Thin film coatings in solar−thermal power systems

Abstract: The applications and requirements for thin film coatings in solar−thermal power systems are reviewed. The substantial impact of selective absorber coatings and antireflection coatings on both flat plate and concentrating type solar collectors is covered. The results of durability life tests on a high−temperature stable, vacuum−evaporated absorber coating consisting of layers of Al2O3−Mo−Al2O3 are reported. This coating was unaffected by 500 h at 930°C. Other tests included thermal cycling, thermal shock, ultraviolet irradiation, and solar wind simulation. An electroplated solar absorber coating for low−temperature applications (<200°C) has been developed which has a solar absorption of 0.96 and an infrared emittance of 0.07 at 100°C. A chemically etched antireflection coating for glass has been investigated. Solar transmission of 0.97 is possible with this low−cost technique.

Polarization-selective laser mirror

Abstract: An optical substrate has an electrically conductive grating on one surface. Over the grating is a multilayered dielectric coating.

Intermittent bonding for high toughness/ high strength composites

Abstract: High strength and high toughness are usually mutually exclusive in brittle filament/brittle matrix composites. The high tensile strength characteristic of strong interfacial filament/matrix bonding can, however, be combined with the high fracture toughness of weak interfacial bonding, when the filaments are arranged to have alternate sections of high and low shear stress (and low and high toughness). Such weak and strong areas can be achieved by appropriate intermittent coating of the fibres. The strong regions ensure that the filament strength is picked up; weak areas randomly in the path of running cracks serve to blunt them by the Cook/Gordon mechanism which, in turn, produces long pull-out lengths with an associated large contribution to toughness. Boron-epoxy composites of volume fraction 0.20 to 0.25 have been made in this way which have fracture toughnesses of over 200 kd m -2, whilst retaining rule of mixtures tensile strengths (~ 650 MN m-2). At the volume fractions used, this apparently represents Kic values greater than 100 MN m -3/2, An analysis is presented for toughness and strength which demonstrates, in broad terms, the effects of varying the coating parameters of concern. Results show that the "toughness" of interfaces is an important parameter, differences in which may not be shown up in terms of interfacial "strength". The choice of coating material is crucial in getting the desired effect. Some observations are made upon methods of measuring the components of toughness in composites.

Decorative metal film heat transfer decalcomania

Abstract: A receiving surface is decorated with a metal film in a pattern by applying an area of thin frangible metal to a temporary carrier having a release surface, printing an adhesive in the pattern desired for the metal on either the metal film or receiving surface, the area of the pattern being less than the area of the metal film, pressing and adhering the receiving surface and metal film together with the adhesive therebetween, and stripping away the carrier The metal over the adhesive remains on the receiving surface to provide the decorative metal pattern and the balance is carried away with the carrier The receiving surface can be a final surface to be decorated or can be the exposed surface of an ink design heat transfer In the latter case, a combined heat transfer having both a decorative metal film pattern and a multicolor ink design can be provided by coating the receiving surface, after transfer of the metal film pattern thereto, with a second adhesive over both the metal pattern and ink design

Optical transmission fiber

Abstract: An optical transmission fiber which is formed by applying and baking a liquid resin composition or a solution or a dispersion prepared by dissolving or dispersing in a solvent a liquid or solid resin composition onto a glass fiber for optical transmission and, further, coating thereover by melt extrusion a thermoplastic resin composition.

Coated cemented carbide product

Abstract: A HIGH-STRENGTH, COATED CEMENTED CARBIDE PRODUCT COMPRISING A CEMENTED CARBIDE SUBSTRATE AND A FULLY DENSE ALPHA ALUMINUM OXIDE COATING ON THE SUBSTRATE. THE COATING HAS A THICKNESS OF FROM 1-20 MICRONS AND IS FIRMLY AND ADHERENTLY BONDED TO THE CEMENTED CARBIDE SUBSTRATE THROUGH A THIN INTERMEDIATE NONMETALLIC LAYER OF AN IRON GROUP METAL ALUMINATE. THE COATED PRODUCT COMBINES A WEAR RESISTANCE SUBSTANTIALLY AS HIGH AS ALUMINUM OXIDE CUTTING MATERIALS AND A TRANSVERSE RUPTURE STRENGTH OF AT LEAST 150,000 P.S.I. THE COATED PRODUCT IS PREPARED BY PASSING WATER VAPOR, HYDROGEN GAS AND AN ALUMINUM HALIDE OVER THE SUBSTRATE AT A TEMPERATURE OF FROM 900*-1250* C., THE RATIO OF WATER VAPOR TO HYDROGEN GAS BEING BETWEEN ABOUT 0.025 AND 2.0.

Method for coating a substrate

Abstract: An improved method is described for coating a substrate in a system in which an insulating layer is also formed on one portion of a conductive target plate which is bombarded with ions. One such system is a reactive sputtering system in which a predetermined partial pressure of a reactive gas is established between a reactive metal target plate and the substrate. The bombarding ions are formed in a glow discharge plasma which may be magnetically confined. In accordance with the invention, an ac potential is applied to the target plate in order to prevent arcing which is believed due to the dielectric breakdown of the insulating layer.

Tablets coated with aqueous resin dispersions

Abstract: Coated tablets are prepared by applying to a core of active material, at least one layer of a coating composition made up of a film forming aqueous synthetic resin dispersion and from 2-50% by weight of a water or alkaline soluble material and thereafter permitting the coating composition layer to dry The resulting coated tablet has a core surrounded by a continuous porous matrix of synthetic resin formed from the aqueous dispersion which is insoluble in water and insoluble in the gastrointestinal tract The pores of the continuous resin matrix are filled with a discontinuous particulate material which is water or alkaline soluble The coated tablet initially is air and moisture tight

In-mold coating composition and method of applying same

Abstract: An in-mold coating composition is disclosed which includes (a) an isocyanate-terminated material containing an excess of reactive isocyanate groups and (b) a material selected from the group consisting of a composition containing reactive hydrogen atoms, generally hydroxyl groups, and a catalyst capable of trimerizing the terminal isocyanate groups. The coating composition is applied to a molded substrate, such as an FRP part, by placing a charge of the composition in the mold on the substrate, the charge being sufficient to provide a coating having a thickness less than about 20 mils. Appropriate pressure is then applied to the charge, such as by closing the mold, so that the coating composition is forced to cover substantially the entire surface area of the substrate, filling any surface defects. The composition is cured to yield a crosslinked, isocyanate-based coating which adheres tightly to the substrate.

Instability of film coating of wires and tubes

Abstract: The stability problem of the free coating of wires and tubes by withdrawal is formulated and solved. The necessary condition for the stability of the film coating is given explicitly in terms of the Reynolds number, wave number, the Weber number, and implicitly in terms of the withdrawal velocity. The outcome of the competition between the destabilizing capillary pinching and the stabilizing capillary restoring force associated with the film thickness variation is shown to dictate the stability of the film. The comparisons between the present theoretical results and the known experimental results for falling films and creeping annular threads of viscous liquids are good. A possible application of the present results to some aspects of the qualitative design of a coating process is given.

Process for preparing transparent coating compounds

Abstract: PURPOSE:To obtain transparent coating compounds with improved antistatic properties and water resistance by copolymerizing a hydrophilic monomer and hydroxymethacryloxy propyltrimethylammonium chloride.

Composite prosthetic device with porous polymeric coating

Abstract: The invention is an improvement in a prosthetic device of the type that is a composite of a first material adapted to be strong enough to withstand the wear and stress exerted on the prosthetic device and a second material in the form of a coating fixed to the first material over a substantial portion of the outer surface of the prosthetic device that engages the bone to which the prosthetic device is attached. The coating is adapted to allow adjacent human tissue to grow therein. The improvement comprises the coating being at least 1 mm. thick and formed of a porous polymeric material that includes a network of interconnected pores throughout its volume. The average pore diameter of the coating ranges from 50 μm - 300 μm, the minimum pore volume being 30%.

Antioxidant coating of copper parts for thermal compression gang bonding of semiconductive devices

Abstract: Copper parts associated with thermal compression bonding of lead structures to a semiconductive device, such as the lead frame, the interconnect lead, and the gang bonding bumps, are coated with an antioxidant material. The antioxidant material and its thickness are chosen to be compatible with thermal compression bonding therethrough so that the completed thermal compression bond forms a bonding interface to the copper through the antioxidant coating. Suitable antioxidant coating materials include, gold, chromate, and copper phosphate.

Pressure variable capacitor

Abstract: A pressure responsive diaphragm is attached to a substrate carrying a thick film metallic coating covered by a dielectric glass coating so that the diaphragm and thick film coating comprise a pressure variable capacitor. Changes in pressure difference across the diaphragm force the diaphragm to roll against the glass to vary the area of diaphragm in contact with the glass, thus changing the capacity.

Lithographic printing plate comprising hydrophilic layer of polyvinylacetate crosslinked with tetraethylorthosilicate

Abstract: A method of providing a printing plate comprises coating on a support a layer having a hydrophilic surface comprising the homogeneous reaction product of hydrolyzed polyvinyl acetate and hydrolyzed tetraethyl orthosilicate. The coating may also contain pigments such as titanium dioxide and the like. A printing plate is provided having a support having thereon a layer having a hydrophilic surface and over the layer a silver precipitating layer, preferably comprising nickel sulfide and silver iodide. An image is provided in the silver precipitating layer by diffusion transfer and treated with a thiol or similar sulfur-containing material to improve the ink-water balance of the plate.

Superalloy base having a coating containing silicon for corrosion/oxidation protection

Abstract: Coatings are described which are particularly suited for the protection of nickel and cobalt superalloy articles at elevated temperatures. The protective nature of the coatings is due to the formation of an alumina layer on the surface of the coating which serves to reduce oxidation/corrosion. The coatings contain aluminum, chromium, yttrium (or other oxygen active elements) and a metal chosen from the group consisting of nickel, cobalt and iron or mixtures thereof. The coatings further contain a controlled percentage of silicon which serves to greatly improve the protection afforded by the alumina film to the surface of the coating.

Powa-method for coating and product

Abstract: POWA-METHOD FOR COATING AND PRODUCT ABSTRACT OF THE DISCLOSURE A method for painting automobiles and other articles of manufacture which admits of the use of medium to high con-centration of metal pigments, can provide high gloss finish coatings and employs a low concentration of volatile solvents comprising application of a relatively thin, highly pigmented, water-based coating to a substrate, heat curing, application of an unpigmented or lightly pigmented powder coating that is transparent on curing, and heat curing of the powder coating. Products bearing unique finish coatings prepared by this method are claimed.

Intumescent fire-retardant coating compositions containing amide-polyphosphates

Abstract: An intumescent fire-retardant coating composition containing, as a fire-retardant ingredient and an intumescent solid, a substantially water-insoluble amide polyphosphate condensate is disclosed

Preservation of agricultural products

Abstract: A composition comprising a dispersion prepared by dispersing in an aqueous solution of a water-soluble high polymer, such as polysaccharides, a hydrophobic substance selected from the group consisting of hydrophobic solids and hydrophobic and non-volatile liquids, such as natural waxes, is applied as a coating to cover the outer surface of an agricultural product to form a coating membrane upon drying, which membrane has fine continuous microvoids by which the respiration of the agricultural product can be controllably suppressed thereby to effectively preserve the product over a long period.

Method for coating and product

Abstract: METHOD FOR COATING AND PRODUCT ABSTRACT OF THE DISCLOSURE A method for painting automobiles and other articles of manufacture which admits of the use of medium to high con-centration of metal pigments, can provide high gloss finish coatings and employs a low concentration of volatile solvents comprising application of a relatively thin, highly pigmented, water-based coating to a substrate, air drying or optionally, heat curing, application of an unpigmented or lightly pigmented water-based coating that is transparent on curing, and heat curing of the powder coating. Products bearing unique finish coatings prepared by this method are claimed.

Coated cemented carbide elements

Abstract: Cemented carbide elements with working faces bearing a thin multilayer or stratified coating of nonuniform composition of wear-resistant materials exhibit superior wear-resistance for improved performance and service life under severe service conditions as in the case of inserts for cutting tools and wire drawing dies. In one embodiment, an initial carbon-rich layer of titanium carbide or carbonitride coating material in direct contact with a cemented carbide part or insert underlies a middle or intermediate stratified transition zone made up of a series of parallel layers or strata of coating material wherein the content of carbon and nitrogen is not constant but varies with the stratum or location by depth in that zone with the material gradually changing to titanium compounds that are progressively lower in combined carbon content and richer in nitrogen than in the initial layer until the composition of the outermost stratum of the transition zone approximates that of the overlying surface layer of high nitrogen content (e.g., titanium nitride). The coating is formed by a gas deposition method wherein changes in the concentration of gaseous carbon and nitrogen compounds are used to control the formation of the various layers of different composition in the layered coating.

Method for fusibly bonding a coating material to a metal article

Abstract: A method for fusibly bonding a coating material to a metal article includes depositing such coating material in solid form on a surface of the article, substantially simultaneously thermally liquifying the coating material and the surface of the article by focusing a relatively high power continuous wave laser beam thereon, and removing the laser beam therefrom to allow cooling and hardening thereof so as to provide a solidified surface layer with a strong and relatively thin interstitial bond between the layer and the article. An exemplary engine valve with a relatively fine structure of the coating material for increased hardness is disclosed.

Ambient temperature, moisture-curable acrylic-silane coating compositions having improved potlife

Abstract: The potlife of an ambient temperature, moisture-curable coating composition comprising an acrylic-silane interpolymer and a cure-accelerating catalyst is increased by the addition to the composition of from about 0.5 percent to about 15 percent by weight of interpolymer solids of a monomeric hydrolytically reactive organo-silicon compound represented by the structural formula: X.sub.n Si(OR).sub.4-n wherein X is an organic radical having from 1 to 12 carbon atoms, R is methyl, ethyl, 2-methoxyethyl, 2-ethoxyethyl, or an acyl group containing 5 or less carbon atoms and n is 0, 1 or 2.

Process for the production of abrasives

Abstract: A process for preparing abrasives which comprises coating a fibrous substrate with a binder comprising a hardenable resin and subsequently curing the binder coat by electron irradiation. The radiation dose may have an energy of from 175,000 to 1,000,000 eV and a dose of from 0.5 to 30 Mrad. An abrasive which is obtained by the process and which is water resistant.

Laminated structures and methods and compositions for producing same

Abstract: Methods for bonding two substrates, one of which is polymeric, which comprise coating the surface of at least one substrate with an adhesive composition comprising a major component which is an adhesive for the first substrate and a minor disperse phase which is a solution of a polymer in a solvent for the polymeric substrate and contacting the coated surface of the one substrate with the surface of the other substrate, together with adhesive compositions useful for joining such substrates, laminates so formed, and articles comprised of such laminates.

Hermetic sealing cover for a container for semiconductor devices

Abstract: A hermetic sealing-cover unit for a container for semiconductor devices is fabricated by applying to the cover a solution of a thermosetting plastic material in a drying solvent to form a thin plastic coating on the cover. The solution preferably is a 10% concentration by weight of epoxy resin in a solvent comprising a mixture of methanol, ethylene dichloride, and dioxane in the ratio of 50:35:15. The cover element is of a material impervious to moisture and air, preferably a material of the group which includes metal, glass, quartz, and ceramic. A sealing ring is formed of substantially chemically unreacted thermosetting plastic material, preferably the same as the plastic material of the cover coating, and is of a size substantially to register with the periphery of the cover. The ring is then pressed into engagement with the plastic coating on the cover at ambient temperature, while the coating is still tacky, and the drying of the coating on the cover is completed to adhere the ring to the cover.