Abstract: The invention refers to a process to render antiscratch and antiabrasion shaped articles based on thermoplastic acrylic polymers consisting in coating the article by a composition comprising(A) 55-95% by weight of at least a (meth)acrylic monomer and/or oligomer having at least two double bonds;(B) 5-25% by weight of monomers and/or oligomers of divinylethers and/or epoxides(C) 0-20% by weight of monomers and/or oligomers containing polar groups of monofunctional (meth)acrylaytes and/or monovinylethers, when (A) or (B) do not contain polar groups, and comprising a mixed system of photoinitiators of radical and cationic type, then in submitting the coated article to U.V. irradiation, at temperatures of 30.degree.-70.degree. C. to polymerize and crosslink the coating in situ.

Abstract: The invention relates to a method of coating articles with powder coatings which contain polymers and are applied to the surface of the substrate to be coated, are melted and are crosslinked by UV radiation, the polymers employed being copolymers of(a) at least one monomer of the general formula (I)CH.sub.2 .dbd.C(R.sup.1)--CO--OR.sup.2 (I)whereR.sup.1 =H or CH.sub.3 andR.sup.2 =H, C.sub.n H.sub.2n+1 where n=from 1 to 30, or is an alicyclic, araliphatic or heterocyclic radical, hydroxyalkyl, alkoxyalkyl, glycidyl or aminoalkyl,or of the general formula IICH.sub.2 .dbd.C(R.sup.1)--CO--NR.sup.3 R.sup.4 (II)where R.sup.3 =H or CH.sub.3 andwhere R.sup.3 and R.sup.4 may be identical to or different from one another and are H, CH.sub.2 OH, C.sub.n H.sub.

Abstract: A humidity sensor includes a pair of opposed electrodes disposed on an insulating substrate and defining a gap therebetween and a humidity sensitive thin film covering the gap. This thin film is formed by coating a polymer of specific structure having an ethylenically unsaturated reactive group and exposing the coating to ultraviolet radiation for crosslinking. The sensor is fully water resistant and produces accurate outputs over a wide humidity range and thus can detect and determine moisture in the surrounding atmosphere.

Abstract: An improved process which comprises applying a layer of a color coating composition to a substrate used for the exterior of a motor vehicle and then applying a layer of a clear coating composition to the color coating and curing the resulting clear coat/color coat layer; the improvement is the use of a clear coating composition containing a film forming binder of an acrylosilane polymer and exposing the clear coat layer after curing to an artificial source of UV light under ambient temperatures and atmospheric conditions in an amount sufficient to improve the resistance of the clear coat to water spotting and acid etching when exposed to natural weathering conditions.

Abstract: An improved method for preparing copper clad laminates from a copper substrate without a conventional or infrared oven. The method contains the steps of: (a) preparing a precursory coating composition which can be subsequently cured to become polyimide; (b) coating the precursory coating composition on a copper substrate; and (c) exposing the precursory coating composition to an infrared heater provided in an infrared curing apparatus. The infrared heater is selected such that it emits infrared rays of wavelengths correponding to the absorption spectrum of the precursory coating composition. A plurality of infrared heaters can be provided in the infrared curing apparatus, each can be designed to have a different effective heating length and/or operated at a uniquely predetermined surface temperature for optimum energy efficiency.

Abstract: A gloss coating composition comprising radiation curable oligomers and monomers, and photosensitizers in a homogeneous mixture having a viscosity in the range of 4500 to 8000 cps; wherein the presence of the photosensitizers causes polymerization of the radiation curable oligomers and monomers when exposed to an ultraviolet light source. The coating composition is applied to at least one surface of a substrate and exposed to an ultraviolet light source resulting in curing of the composition onto the substrate surface without substantial penetration into the substrate surface forming a gloss coated substrate.

Abstract: A sprayable coating composition is formulated using one or more acrylates and one or more photoinitiators which act to polymerize the composition when exposed to ultraviolet light. Because of the use of low molecular weight monomers or oligomers, the composition is essentially free of volatile organic solvents and therefore evaporative emissions in curing are substantially eliminated.

Abstract: A process for preparing a hydrophilic polymer film comprising coating a photopolymerization solution which comprises a hydrophilic monomer of lower water swelling ability and a UV stabilizer, on the film surface pre-treated with high frequency, and photopolymerizing the solution so as to improve the hydrophilic property, climate-resistability, and blocking property of the polymer film.

Abstract: A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed, particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, and the preferred composition contains n-vinyl-2-pyrrolidone, N,N-dimethylacrylamide, and polyvinylpyrrolidone.

Abstract: Disclosed are compositions which are useful for forming photodelineable coatings on substrates. The compositions contain a solvent, hydrogen silsesquioxane resin and an initiator which generates free radicals upon exposure to radiation.

Abstract: The invention provides a process for producing an improved barrier laminate structure composed of an oxygen barrier silicone coating on a paper or paperboard substrate. The process comprises hydrolyzing a silane formulation with water to form a corresponding silanol. A photoinitiator is added to the silanol to form an ultraviolet sensitive formulation. The formulation is coated onto a paper or paperboard substrate and allowed to dry. Once dryed, the formulation is exposed to ultraviolet radiation to form a cured formulation.

Abstract: An infinite network polymer containing fluorine as a coating or cladding material for optical fibers. Fluoropolymers, such as silicone amine C.sub.0 -C.sub.16 fluoroepoxy resin and cis-trans fluoropolyol polyacrylate, reduce water permeability because of the bonding between the fluoropolymer and the substrate. The fluoropolymers exhibit substantially increased moisture resistance when compared to conventional fiber coating materials. Variations in chemical structure effect physical properties of the polymer and different compounds can be chosen for their desired physical properties, such as moisture resistance or abrasion resistance. Incorporation of fluorine into the polymer structure lowers the index of refraction such that the polymer can be used as a cladding for silica glass in an optical fiber. One fluoropolymer formulation allows in-line coating of the optical fiber in a oxygen environment.

Abstract: A method of making a UV curable hardcoat composition uses a strip-free process and produces hardcoats having good scribed tape-pull adhesion, high resistance to scratching and a low delta taber haze after abrading for 500 cycles with a 500 gram weight. UV curable hardcoat compositions are also provided which contain high solids contents and high mole percentages of photoinitiator. Compositions containing methoxypropanol as a water miscible alcohol and methylbenzoylformate as a photoinitiator exhibit high taber hardness and can be made by processes which obviate the need for a time and energy consuming solvent-strip step. The processes are not only shorter, but safer than processes which include a solvent-strip step.

Abstract: The stain resistance of nylon fibers is improved by attaching stainblocking compounds to the fiber surface using agents which have been grafted to the nylon using UV light and a photoactivator.

Abstract: A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, and the preferred composition contains n-vinyl-2-pyrrolidone, N,N-dimethylacrylamide, and polyvinylpyrrolidone.