Abstract: Cellulose materials such as paper and card stocks are provided in a generally transparent or so-called transparentized form while substantially maintaining the initial strength and stiffness of the pretreated stock. A generally opaque stock is treated with a solventless resin system which is cured by actinic radiation in order to thereby transparentize the stock without subjecting it to lengthy and relatively severe wetting conditions.

Abstract: Composite energy control sheet of the type wherein a transparent-reflective metal layer is coated on a self-supporting transparent polymeric foil and protectively covered with a transparent polymeric layer. The protective polymeric layer is chosen to transmit 80% or more of the normal room temperature radiant energy spectrum (about 4-40 micrometer wavelength) so that when the energy control sheet is positioned adjacent (but other than outside of) a glazing unit and oriented so that the protective layer does not contact any face of the glazing unit, heat loss from the room is significantly decreased and the cold weather performance of the sheet is greatly improved. Among the suitable polymers for the polymeric layer are polyethylene, polypropylene and polyacrylonitrile.

Abstract: A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having disposed on the surface thereon a non-opaque primer layer comprised of a thermoplastic acrylic polymer containing functional groups and disposed on said primer layer a non-opaque top coat comprised of a colloidal silica filled thermoset organopolysiloxane.

Abstract: A polycarbonate article having a durably adherent mar, abrasion and chemical resistant UV cured coating on the surface thereof comprised of the photoreaction products of (i) certain polyfunctional acrylate monomers and (ii) resorcinol monobenzoate.

Abstract: This invention relates to a method of making transparent laminated windows with a minimum of opacity problems that may result from adhering preformed polyurethane sheeting to acrylic or polyurethane sheeting that constitute components of said transparent windows. The preferred embodiment of the invention comprises applying a dilute solution of up to 5 percent by weight, preferably 1 to 4 percent and most preferably about 2 percent, of finely divided particles of a polyurethane in an organic solvent in which it is highly soluble. A preferred solvent is chloroform. A preferred polyurethane composition is a polyesterurethane that is the reaction product of (a) a polyester having the ester linkage ##STR1## and a pair of groups reactive with isocyanate or isothiocyanate groups; (b) a diisocyanate, disisothiocyanate or a compound containing an isocyanate and an isothiocyanate group; and (c) a compound containing at least two active hydrogens per molecule reactive with isocyanate or isothiocyanate groups.

Abstract: Superior top coatings for PVC are polyesters, especially a polyester blend of a terpolymer of tetramethylene glycol reacted with terephthalic acid, isophthalic acid, and azelaic acid, and a copolymer of ethylene glycol reacted with terephthalic acid and sebasic acid.

Abstract: A multi-layer flexible sheet is provided for hanging freely on the interior room side of a window, or the like, that reflects radiant heat from inside the room back into the room with high effective reflectivity, transmits light from the window into the room adequately for looking out, is easily rolled up when not needed, and, furthermore, can be used in summer to reflect out undesired heat and glare from incident sunlight without undue loss of transparency for looking out. A synthetic resin layer of polyethylene or polypropylene having a thickness not exceeding 0.1 mm is on the room side of the laminate and has a metallic film on its outward-facing surface of gold or aluminum that does not need to be of high uniformity in thickness. A cover layer of transparent synthetic resin on the side facing the window protects the metallic film from mechanical damage and is of strength and thickness sufficient to supply any additional necessary mechanical stability.

Abstract: A flexible sheet material for forming an envelope used to enclose and protect electronic components from electrostatic charges during storage and shipment. The sheet material is sufficiently transparent to afford visual identification of an electronic component through the envelope, while including a polymeric sheet having a high volume resistivity to electrically isolate a component within the envelope, an antistatic material which is disposed at an inner surface of the envelope for dissipating and restricting electrostatic charges on components within the envelope, and a highly conductive layer which is then disposed on the outer surface of the polymeric sheet and provides a highly conductive outer surface on the envelope for grounding electrostatic charges brought into contact with the envelope.

Abstract: The invention comprises spectrally selective surfaces having a good performance at relatively low cost, and designed to be used mainly, but not exclusively, in solar thermal energy collectors. Suitable substances in powder form are attached by simple and effective means to a suitable surface. This is accomplished by the use of new classes of binders, or alternatively, by novel, purely mechanical means, without the use of a binder. The binders described herein feature a high transparency for the infrared radiation emitted by the hot underlying surface, coupled with good adhesive properties towards both the powder and the surface to be coated. The method of effecting the adhesion of a powder layer to the underlying surface without the use of a binder consists of bringing the powder layer into intimate contact with the surface, for example by pressing or rolling the powder layer onto or into the surface, especially with simultaneous mechanical deformation of the object whose surface is being coated.

Abstract: A transparent cellulosic paper is produced by coating or impregnating a cellulosic paper with an organic solvent solution containing a compound having a weight-average molecular weight of 200 to 2,000 and having at least two isocyanate groups in a molecule or with an organic solvent solution containing, in addition to said compound, at least one compound selected from the group consisting of an aliphatic monohydric alcohol having 6 to 18 carbon atoms and a nonionic surface active agent to the polyethylene glycol type having one hydroxyl group in a molecule, the ratio OH/NCO in the solution being less than 1; removing said organic solvent; and allowing the coated or impregnated paper to harden by aging.

Abstract: Process for preparing a transparent polypropylene film having good slip and non-blocking properties which comprises admixing polypropylene with a thermoplastic resin in the melt state, the thermoplastic resin having a melting point higher than but no more than 100.degree. C higher than the melting point of the polypropylene and being substantially incompatible with the polypropylene under the mixation condition, to give a polypropylene composition where the thermoplastic resin is dispersed in the form of fine particles of 0.1 to 10 .mu. in average particle size and the amount of the dispersing thermoplastic resin is from 0.01 to 1% by weight of the polypropylene, extruding the resultant composition in the melt state into a film and stretching the film in at least one direction.

Abstract: A film laminate having low surface resistivity, high abrasion resistance, and high light transmission includes a polymeric substrate layer and a transparent metal layer bonded to the substrate by a polymeric coupler. A polymeric coating is applied over the metal layer.

Abstract: Solar control film incorporating a "cling" adhesive layer so that it can be repeatedly applied to and removed from a windowpane. The adhesive layer is obtained by coating on the film a solvent-soluble vinyl chloride or vinylidene chloride copolymer containing a vinyl stabilizer, a tack-inhibiting polymeric modifier and a plasticizer for vinyl resins.

Abstract: A laminate having particular characteristics is used in securing a protective sheet over the emulsion surface of a photographic element such as negatives, positives, slides, glass plates, microfilm, movie film, etc. The optical and mechanical characteristics of the laminate include a protective sheet of transparent, wear-resistant plastic coated with a pressure-sensitive adhesive so that the total thickness of the protective sheet and the adhesive is less than 0.004 inches. The adhesive transmits a major portion of incident ultra violet light and is non-degradable in ultra violet light, and a release sheet of resin material covers the adhesive coating until application to the photographic element when the release sheet is stripped away. Both the protective sheet and the release sheet have a surface finish of less than 10-millionths of an inch RMS so that both the adhesive surface and the protective sheet surface are very smooth when the release sheet is stripped away.

Abstract: A dome for protecting energy responsive instrumentation in a missile is disclosed which utilizes a plurality of wedge shaped transparent elements mounted in a polymer matrix. The transparent elements are arranged so that aerodynamic pressure acting on the dome compresses each transparent element and prevents dome implosion. Individual elements may crack under excessive aerodynamic load, but are held in place by adjacent elements and by aerodynamic pressure, and retain their optical transmissivity during final trajectory to the target.

Abstract: An optical window is provided, particularly for multispectral or broadband wavelength (visible and infrared) transmission, which is resistant to damage or erosion by high velocity raindrops or other adverse environmental conditions. The window consists of a substrate of material having the necessary optical properties for the desired spectral range, with a cladding or protective layer of material of high resistance to erosion or other damage bonded to the substrate by a glass bonding material. While any suitable materials meeting the optical and physical requirements may be used, the substrate may be a material such as zinc selenide with a protective layer of zinc sulfide bonded to the substrate by a thin layer of a chalcogenide glass.

Abstract: Integral negative-positive patterns viewable without separation of the negative-positive components. Essential elements of such film units comprise a photosensitive system which after exposure and processing can provide a diffusion transfer image pattern, an image pattern receiving system and a reflection system integrated with the elements of the product so that after exposure and processing, the image pattern can be viewed as a reflection print. The image receiving system of the products of the present invention comprise a transparent support or dimensionally stable layer through which the image pattern can be viewed and the transparent support or layer is characterized in that a distinctive UV light absorption capability is integrated therewith.

Abstract: A melt-molded polyvinylidene fluoride or polymonochlorotrifluoroethylene sheet having a thickness of about 20 .mu. to 2 mm and a spherulite size of less than about 10 .mu., whereby the sheet transmits more than about 40% of the dorno rays in a wavelength region of about 2,800 to 3,300 A, and a sun room using as a light admitting plate a sheet or plate of the polyvinylidene fluoride or the polymonochlorotrifluoroethylene permitting transmission of the physiologically active rays in sunlight.

Abstract: There is provided a filament of improved light transmission having a sheath-core composite structure formed of a methyl methacrylate polymer core material and a fluorine-containing polymer sheath material. The light transmitting filament is characterized in that the methyl methacrylate polymer core material is prepared by the specific procedure of continuous bulk polymerization and subsequent removal of volatile contents, wherein the polymerization is performed in a continuously and thoroughly stirred reaction vessel at a low catalyst concentration and a relatively high temperature and with improved conversion. The light transmitting filament possesses an absorption coefficient (k) of no greater than 6 .times. 10.sup.-.sup.3 cm.sup.-.sup.1.

Abstract: A storage bag made of a composite film material of two or more plys of plastic film for use in vacuum packaging fresh perishables, such as fresh cuts of meat. The film composite has a matted finish on the inside surface of its inner layer which causes the film to have a translucent appearance. The areas of the bag which are sealed together during the packaging process become transparent to provide a visual inspection for a proper seal.

Abstract: Sheet materials are provided which are useful in preparing negative transparencies for use with overhead projectors. Methods for obtaining image transfer and preparation of transparencies are also provided.

Abstract: The invention relates to decorative plastics laminates with improved clarity in the wear surface layer. The laminates consist of a decorative paper sheet impregnated with a noble thermoset resin, the sheet being supported by a core layer; the sheet carries a coating of a noble thermoset resin and barium sulphate. The thermoset resin is preferably a melamine-formaldehyde resin.

Abstract: A molded article of plastic having on its surface a cured film of a coating material comprising at least 30% by weight of at least one polyfunctional compound selected from the group consisting of poly-methacryloyloxy compounds having a molecular weight of 250 to 800 and containing at least three methacryloyloxy groups in the molecule and poly-acryloyloxy compounds having a molecular weight of 250 to 800 and containing at least three acryloyloxy groups in the molecule, and optionally 0.01 to 5% by weight of a fluorine-containing surfactant and 0.01 to 5% by weight of a carbonyl compound as photosensitizer has improved surface characteristics, particularly a high surface hardness, a high surface smoothness, high heat resistance, high abrasion resistance and a minimized optical distortion. Said molded article of plastic having improved surface characteristics can be prepared by coating the molded substrate of plastic with said coating material to a thickness of 1 to 50.mu.