Showing papers on "Coating published in 1968"

Optical sphere paint and a working standard of reflectance.

Abstract: Specially prepared barium sulfate powders and coatings of these powders with polyvinyl alcohol have been used as working standards of reflectance and for coating integrating spheres. These materials are satisfactory for use in the wavelength range 0.20-2.00 micro. Since the refractive index of barium sulfate is rather low, it is necessary to use fairly thick layers in order to obtain good results. The absolute value of luminous reflectance of the barium sulfate powder, described in this paper, is 0.995 +/- 0.001, and that of the paint, when properly applied, is 0.992 +/- 0.001. The spectral reflectance of this material is higher than that of magnesium oxide, particularly in the uv region of the spectrum. By using barium sulfate as reference standard and as a coating on the integrating spheres of spectrophotometers, it is now possible to measure spectral reflectance reliably in the uv region to 200 nm. Because the reflectance of barium sulfate paint is significantly greater than that of magnes um oxide in the shortwave region, there is a corresponding gain in instrument sensitivity when barium sulfate is used as a sphere coating and as a comparison material.

1 3-phenylenediamine containing photoconductive materials

Abstract: A new group of N,N,N'',N''-substituted-1,3-phenylenediamines and an electrophotographic material comprised of a slightly conductive support and an insulating coating thereon comprised of an insulating resin, and a N,N,N'',N''-substituted-1,3phenylenediamine photoconductor. An electron-acceptor sensitizing agent can also be added to the insulating coating.

Presensitized color-proofing sheet

Abstract: A LIGHT-SENSITIVE COLOR-PROOFING SHEET FOR PRODUCING AN IMAGE ON VARIOUS SUBSTRATES. A LIGHT-SENSITIVE CONTINUOUS COLOR LAYER IS RELEASABLY ATTACHED TO A CARRIER. OVERLYING THE COLOR LAYER IS A WATER-INSOLUBLE TRANSPARENT COLORLESS BARRIER LAYER, TO THE OPPOSITE SURFACE OF WHICH CAN BE APPLIED A PRESSURE-SENSITIVE ADHESIVE. UPON LAMINATION OF THE SHEET TO A SUBSTRATE, AND REMOVAL OF THE CARRIER, THE COLOR LAYER IS FORMED INTO AN IMAGE, PHOTOMECHANICALLY, BY REMOVAL THEREOF IN THE NON-IMAGE AREAS. PERFERABLY THE COLOR COATING IS A PIGMENTED POLYVINYL FORMAL RESIN, THE LIGHT-SENSITIVE COMPONENT IS A DIAZO RESIN (WHICH MAY BE IN A SEPARATE COATING OR COMBINED WITH THE POLYVINYL FORMAL) AND THE BARRIER IS A POLYACRYLATE POLYMER.

Method of making photographic elements

Abstract: In the manufacture of photographic elements, such as photographic film or paper, the support is coated by forming a free-falling vertical curtain of liquid photographic coating composition in such manner that the curtain is stable and has a uniform flow rate across its width and directing the support so that the free-falling curtain impinges thereon, while maintaining a controlled relation between the flow rate and the speed at which the support is moved, to form a thin layer of the coating composition on the face of the support. Apparatus which is particularly advantageous for carrying out this method includes means for advancing the support at the desired speed and a hopper for the coating composition which is provided with a downwardly inclined slide surface down which the coating composition flows by gravity, the slide surface terminating in a lip spaced vertically above the moving support from which the coating composition flows as a free-falling curtain.

Reflex-reflecting aggregate and markers prepared therefrom

Abstract: Aggregates particularly suitable for use in highway marking an having a spherical lens element of a refractive index below 19, a transparent binder coating thereon and, hemispherically embedded in said binder coatings, glass beads having a diameter from about 25 to 150 microns and having a refractive index of at least 21 These aggregated may be hemispherically embedded in a resinous base having light reflecting properties A preferred form of the aggregate includes a light reflecting coating on the exposed or non-embedded surfaces of the glass beads

Pressure Effects on the Friction Coefficient of Thin‐Film Solid Lubricants

Abstract: Thin solid films on harder backings are now widely used as dry‐film lubricants. An early extension by us of the Bowen‐Tabor adhesion theory of friction showed that the coefficient of friction of a coated backing was equal to only a fraction of that of the coating material, and this fraction was simply the ratio of the mean yield pressure of the coating material to that of the backing. However, we pointed out that the effect of pressure on the shear strength of the coating material was neglected. We have since analyzed and applied to this problem the data on the effect of pressure on shear strength of paraffin, gold, and molybdenum disulfide, using the experimental data of Bridgman as well as of Boyd and Robertson. The principal complication in applying these data to the frictional problem is to allow properly for the elastic (or plastic) deformation of the two sliding solids in calculating the pressure exerted on the coating material during sliding. Our calculated coefficients of friction are in good agreement with the recent measurements of Takagi and Liu on gold‐coated hard steel and the earlier data by Haltner and Oliver on molybdenum‐disulfide‐coated steel. Recently we measured coefficients of friction of thin coatings of paraffin on steel and obtained results which were in good agreement with our calculated values. It is concluded that a sound basis now exists for treating the subject of dry film lubricants. Further research on such systems requires more experimental data on the effect of pressure on shear strength in a variety of indicated polymers and inorganic solids.

Multilayered pipe coatings and coated pipe

Abstract: A PIPE COATING, A COATED PIPE AND METHOD OF FORMING SUCH COATED PIPE ARE DISLOCED WHEREIN THE PIPE IS SURROUNDED BY PREFORMED INSULATION SUCH AS GLASS FOAM AND THE INSULATION IS SURROUNDED BY A MAT MADE UP OF A FIRST LAYER OF HEAT SOFTENING RESIN, A SURROUNDING LAYER OF WOVEN GLASS FABRIC, A SECOND LAYER OF SAID RESIN, A LAYER OF CONDUCTIVE FOIL, A THIRD LAYER OF SAID RESIN AND AN OUTER LAYER OF WATER IMPERVIOUS PLASTIC FILM, SAID MAT BEING PLACED WITH OVERLAPPING EDGES WHICH ARE HEAT SEALED TOGETHER

Cellular laminate made from two thermoplastic sheets having polyvinylidene chloride coatings on facing sides of the sheets

Abstract: An improved cellular product formed of multiply laminates wherein at least one of the laminates is embossed and the other of the laminates seals the embossments, each of the laminates consisting of at least a plastic base material and a gasimpervious coating and wherein at least one of the coatings is protected by the base material.

Nickel or cobalt base with a coating containing iron chromium and aluminum

Abstract: 1,261,262. Fe-Cr alloy. UNITED AIRCRAFT CORP. May 9, 1969 [May 23, 1968], No.23801/69. Heading C7A. An Fe-Cr alloy, for coating Ni or Co base alloys, comprises: - Al 10-20% Cr 20-50% and Y/R.E. 0A03-2%, the balance, apart from impurities such as:- C up to 0A02% H " " 0A005% N " " 0A005% O " " 0A01% P " " 0A01% S " " 0A01% and other elements up to 0A5% total, being Fe. The coating may be applied by vapour deposition and post-treatment as set out in Specification 1,261,261.

Polyimide and polyamide-polyimide as a semiconductor surface passivator and protectant coating

Abstract: Exposed portions of PN junctions and exposed surfaces of bodies of semiconductor material are passivated and protected by a coating of a cured, material selected from the group consisting of aromatic polyimides and aromatic polyamide-polyimides.

Nonfogging transparent material

Abstract: A transparent nonfogging coating is applied to a normally fogging transparent or reflecting substrate. The nonfogging coating preferably comprises a hydrophilic acrylate or methacrylate polymer. The polymer can be modified by copolymerization with a monobasic or polybasic unsaturated carboxylic acid or partial ester thereof. The polymer can be cross-linked with a polyepoxide to increase its hardness. Typical substrates include automobile, train and airplane windows, sunglasses, camera lens, microscope lens, binocular lens, telescope lens, meat wrappers, diving masks, ski glasses, mirrors.

TiO{11 {0 IN POLY(ARYLENE SULFIDE) FOR COATING COMPOSITION

Abstract: Normally solid poly(arylene sulfide) containing about 0.5 to about 50 weight percent TiO2 is applied to a substrate to form a leveled coating without pinholes which is intimately bonded to the substrate. Preferably, the polymer-TiO2 mixture is applied as a slurry in a carrier liquid such as ethylene glycol, methyl alcohol, water, toluene, and the like, or mixtures thereof, and thereafter heated to form a coating.

Thin film coating for sunglasses

Abstract: 1,265,831. Optical filters. EASTMAN KODAK CO. Feb. 27, 1969 [March 4, 1968], No.10481/69. Heading G2J. [Also in Division C7] An optical filter, particularly for use in sunglasses, comprises a gold or copper foil 12 sandwiched between two transparent layers 14, 16, to filter I.R. and U.V. radiation from one side of the filter, and a metal, semi-metal or alloy layer 18, having a complex refractive index whose real part is within a factor of 10 of its imaginary part, to reduce reflection from the other side of the filter. The various layers 12, 14, 16 and 18 are successively deposited on a plastics or glass substrate 20 by vacuum distillation, or in the case of the gold or copper foil by cathodic sputtering, electrolysis or chemical methods. The order of deposition may be reversed, Fig. (not shown) and a protective plastics or glass layer may be provided at the side remote from the substrate, Figs.5 and 6 (not shown). The layers 14, 16 may consist of the oxides of titanium, lead or bismuth or zinc sulphide, and the layer 18 may be constituted by Ni, Fe, Cr, Ti, Al, La, In, Sn, Pb, Ta, W, Co, Mo, Os, Ir, Pt, Yt, Zr, Ni, Zn, Cd, V, Hf, Re, Tl, Si, Ge, As, Sb, or Te or an alloy or any two or more thereof.

Process for electroless metallizing incorporating wear-resisting particles

Abstract: There are disclosed processes for electroless metallizing workpieces to provide thereon a metal coating incorporating therein nonmetallic wear-resisting particles and the coated workpieces produced by such processes, the processes comprising contacting the workpieces with an electroless metallizing bath consisting of an aqueous solution of a metal salt and an electroless reducing agent therefor and a quantity of nonmetallic wear-resisting particles, wherein the particles are essentially insoluble in the plating bath and are noncatalytic and inert with respect thereto, the particles being present in the bath in an amount by weight no greater than about four times the weight of the metal in the bath expressed as free metal, and maintaining the particles in suspension throughout the bath during the metallizing of the workpiece; the electroless coating with the wear-resisting particles therein may be heat treated by heating to an elevated temperature in the range 100* C. to 600* C. for one hour or more further to harden the coating.

Armored metal tools

Abstract: Armored metal tools having a hard wearing, ductile, abrasive coating produced in situ from powdered matrix metal particles and abrasive particles of hard, high melting material, said tools comprising a structural base composed of a base metal, at least a portion of the surface of which is covered with a relatively thin, adherent and homogeneous layer of substantially uniform thickness, of said metal powders fusion bonded to each other and to said base metal and alloyed with said base metal throughout an interlayer between said base metal and coating layer, said coating layer of said fusion bonded metal powders having embedded therein and projecting from the surface thereof, a multiplicity of said abrasive particles forming projecting cutting edges and being composed of material selected from the group consisting of diamond substitute materials, such as metal carbides, borides, nitrides or silicides or mixtures thereof, said base metal being optionally composed of a heat treatable ferritic steel or alloy steel.

Polyurethane rubber covered roll

Abstract: Metal core is wrapped in fibres impregnated with a thermoset resin and then transferred to a cylindrical mould where the polyurethane rubber composition is injected and bonds to the fibre wrapping. Moulding is effected before or after curing of the resin and with or without initial surface treatment such as trimming or bonding agent coating. Surface stripping is minimised by the fibre coating. Paper making rolls are suitably covered in this way.

Antimycotic overcoating treatment of cellulose sausage casing

Abstract: Cellulose sausage casings are protected against fungus growth by overcoating with a partially water-swellable, water-insoluble, water- and gas-permeable coating composition containing an antimycotic agent which will leach slowly from the coating under conditions of use. Preferred coating compositions comprise a long-chain polyester and a polyacrylic acid emulsion, and an antimycotic agent such as potassium, sodium, or calcium sorbate or propionate, or sorbic or propionic acid, or the lower alkyl esters of parahydroxybenzoic acid, and form a water-insoluble, partially water-swellable, water- and gas-permeable coating upon curing.

Method for coating the superalloys

Abstract: 1,261,261. Coating with a Fe-Cr-Al alloy. UNITED AIRCRAFT CORP. May 9, 1969 [May 23, 1968], No.23700/69. Headings C7A and C7F. Nickel- or cobaltbased superalloys are coated (e. g. by vapour by deposition) with an alloy comprising:- Cr 20-50% Al 10-20% and Y/R.E. 0A03-2% the balance, apart from impurities, being iron; the coated body is optionally heat treated at 1038‹C.; the coating is cold worked (e.g. by shot peering and particularly glass bead blasting) and is then annealed to recrystallize it (e.g. at 1065-1093‹C.).

Magnetic memory members and methods of making the same

Abstract: A magnetic memory member produced by providing a master member of glass, or the like, having a predetermined finished surface to which a very thin silver or other parting agent may be applied, a magnetic coating of a desired thickness being applied to the parting agent, which coating may, for example, be magnetic particles in a binder or magnetic material plated directly on the parting agent, the magnetic coating assuming the same surface condition as the master member. A substrate is secured to the magnetic coating, the parting agent released from the master member and the parting agent removed from the coating. Where the magnetic coating includes a binder with magnetic particles therewithin, the magnetic memory member so produced has a dense film of magnetic particles concentrated at the outer surface of the coating for subsequent coaction with a recording or reproducing head.

External busbar system

Abstract: 1,237,514. Laminates. SIERRACIN CORP. 29 April, 1969 [7 May, 1968], No. 21718/69. Heading B5N. [Also in Divisions H4-H5] A laminated structure comprises two outer layers 10 of rigid transparent material such as glass, an interlayer 12 of plastics material such as polyvinyl butyral adhered to at least one of the outer layers, an electrically conductive coating 16 of gold or tin oxide between the outer layers and extending beyond an edge of at least one of them, and a bus-bar 18 electrically connected to the exposed part of the coating. The coating may be deposited (e.g. by vacuum evaporation) on one of the outer layers as in Fig. 5 or on a carrier layer 14 (Fig. 1) of "Mylar" (Trade Mark), fluoroethylpropylene or cellulose triacetate and may be thicker near the outboard edge of the laminate. It may be extended beyond the outer layers by means of a flexible tape carrying a further electroconductive coating (Fig. 4, not shown). In a further modification (Fig. 8c, not shown), the carrier layer 14 is folded over before lamination and bonded between the outer layers to form an external loop which is then cut to expose the coating prior to insertion of the bus-bar. A reinforcing layer (31) of electrically conductive material may be provided. The bus-bar may be an electrically conductive metal strip, wire or braid or metalloaded resinous material and may be bonded or mechanically fixed to one of the outer layers. It may be encapsulated in casting resin. The flexible carrier layer may enclose the bus-bar in which case slits or tabs are cut in the projecting edge of this layer to eliminate wrinkling. A "prelaminate" which can be rolled up or used directly for lamination between sheets of transparent material comprises a flexible carrier layer carrying an electrically conductive coating on one surface and a layer of plastics material adhered to each surface of the coated carrier layer, the carrier and coating extending beyond at least one edge of the plastics layers.

Spray coating compositions

Abstract: THE INVENTION RELATES TO A SPRAY COATING COMPOSITION. THE COMPOSITION INCLUDES A CERAMIC MATRIX MATERIAL WHICH HAS BEEN REACTED WITH ADDITIVES TO FORM AN ADDITIONAL PHASE WITHIN THE MATRIX; THE COMBINATION OF MATRIX MATERIAL AND ADDITIONAL PHASE MATERIAL IMPROVING COATABILITY AND COATING PROPERTIES. A PREFERRED EXAMPLE OF SUCH A COMPOSITION IS AN ALUMINA (AL2O3), ZIRCONIA (ZR2) AND CHROMIA (CR2O3) MATRIX WITH AN ADDITONAL PHASE FORMED FROM ALUMINA, ZIRCONIA OR CHROMIA WITH IRON OXIDE (FE2O3) AND TITANIUM DIOXIDE (TIO2). SILICON DIOXIDE (SIO2) IS ALSO A CANDIDATE ADDITIVE FOR FORMING A GLASSY PHASE OR MULLITE WHEN REACTED WITH THE ALUMINA.

Automatic arc welding electrode with an electrically conductive flux coating

Abstract: The invention consists of a continuous electric arc welding electrode of indefinite length consisting of a metal core and an outer coating which is electrically conductive so that the electrode can be energized by sliding it across conventional electrical contacts. The coating is comprised of: a mixture of an organic resin, which chars when heated to elevated temperatures; carbon or metal powders which conduct current through the resin; and, possibly other known fluxing ingredients. A thin outer metallic coating is often also used which conducts current from the contacts circumferentially and longitudinally to the electrically conductive coating.

Process for producing at least one constituent dispersed in a metal

Abstract: ALLOYS CONTAINING AT LEAST ONE CONSTITUENT DISPERSED IN METAL IN WHICH THE CONSTITUENT IS NORMALLY INSOLUBLE OR INCOMPATIBLE WHEN THE METAL IS IN THE MOLTEN STATE (E.G., GRAPHITE IN ALUMINUM), ARE PRODUCED UTILIZING MELT PROCESSING IN WHICH THE CONSTITUENT IN PARTICULATE FORM AND HAVING A COATING, PARTICULARLY METAL, IS INJECTED INTO A MOLTEN BATH OF INCOMPATIBLE METAL AND THE MELT IS THEREAFTER SOLIDIFIED.

Thermoset polydiene resin adhesive bonded laminates and methods of making same

Abstract: This invention relates to polydiene resin coatings, adhesives, and laminates, and the methods of producing the same. In particular a polydiene resin, such as dihydroxyl terminated 1,2polybutadiene, is mixed with an organic chain extender, such as 2,4-toluene diisocyanate, in the presence of a peroxide free radical initiator, such as dicumyl peroxide, to form a liquid polymeric mixture. The liquid polymeric mixture is dissolved in a carrier solvent to facilitate application on a surface to be coated or bonded. After removal of the carrier solvent, the liquid polymeric mixture is exposed to ambient or slightly elevated temperatures whereby an elastomeric coating or bond is formed. At a subsequent period of time, the elastomeric material is exposed to elevated temperatures whereupon the elastomer is cured to a hard resinous coating or bond.

Method of providing an electric connection on a surface of an electronic device and device obtained by using said method

Abstract: 1,204,263. Contacts for electrical devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 24 Jan., 1968 [25 Jan., 1967], No. 3676/68. Heading H1K. An electrode is applied to the surface of an electrical device such as a semi-conductor integrated circuit by a process comprising the steps of applying a metal layer 8 to the body 1 to be contacted, applying a metal mask 9 over the layer 8, depositing metal 20 on to the portion of the layer 8 exposed through the mask 9, and dipping the arrangement in a molten solder which adheres only to the deposited metal 20 to form a coating thereon but does not adhere to the mask 9. The embodiment comprises an N- type Si body 1 having a diffused P-type zone 4, the layer 8 and mask 9 respectively comprising vapour deposited layers of Ag and Al. Apertures are etched through the Al layer 9 to form the mask, and a further mask is applied over the layer 9 to define the regions where subsequent metal deposition is to occur. The metal parts 20, 21 may be applied by electroless coating or by electrolytic deposition of Cu from an aqueous solution of CuSO 4 containing H 2 SO 4 . The second mask is then removed and the arrangement is dipped into a molten solder comprising 60% Sn, 40% Pb by weight, which adheres only to the surface of the parts 20, 21. The A1 masking layer 9 and the exposed portions of the Ag layer 8 are finally removed by etching or using a water jet.

Dispensing gun for fiber rovings and cementitious materials

Abstract: GLASS FIBER STRANDS ARE DEPOSITED ON A RECEIVING SURFACE COATED WITH A CEMENTITIOUS MATERIAL BY FORCEFULLY PROJECTING THE FLUID COATING MATERIAL FROM A PROJECTION SOURCE WHILE ENTRAINING THE CONTINUOUS FIBER STRAND IN THE COAT- ING MATERIAL FROM WITHIN THE MATERIAL AND PROPELLING THE STRAND AND THE COATING MATERIAL ONTO THE RECEIVING SURFACE.

Corrosion Inhibition and Wear Protection of Gold Plated Connector Contacts

Abstract: The increasing reliability requirements for low-voltage electric contacts has led to a search for methods which could make gold plated surfaces impervious to the effects of atmospheric pollutants. The susceptibility of thin gold plate to corrosion is due both to its inherent porosity and its removal by wear. Because of these breaks in the plate, pollutants can attack the substrate metal or underplate to produce insulating corrosion products. The best methods were the application of a pore-blocking corrosion inhibitor and a lubricant coating having a liquid component. They 'inhibited corrosion and wear effectively, without significantly increasing contact resistance compared to untreated samples.