Abstract: A method for making a plastic lens and a plastic lens made thereby. The method comprises disposing a liquid monomer or a monomer mixture and a photosensitive initiator into a mold cavity and directing ultraviolet light to act on the lens forming material in the cavity to produce a lens therefrom. The liquid monomer mixture may include one or more of diethylene glycol bis(allyl)-carbonate, bisphenol A diallyl carbonate, 1,6 hexanedioldimethacrylate, trimethylol propane triacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, tetrahydrofurfurylmethacrylate, tetrahydrofurfuryl acrylate and styrene. The photosensitive initiator may be selected from the group of 2-hydroxy-2-methyl-1- phenyl-propan-1-one and 1-hydroxycyclohexyl phenyl ketone.

Abstract: The invention is directed to a photosensitive polymer composition capable of being electrophoretically depositable as an adherent, uniform photosensitive film on a conductive surface. The photosensitive polymer composition useful for electrodeposition is formed from an aqueous solution or emulsion of at least one polymer having charged carrier groups, a photoinitiator and a source of unsaturation for crosslinking the resulting film upon exposure to actinic radiation. The photosensitive film formed from the photosensitive polymer composition is aqueous developable and resistant to strong inorganic acids and strong bases. The photosensitive polymer composition is useful in the preparation of printed circuit boards, lithographic printing plates, cathode ray tubes, as well as in chemical milling, solder resist and planarizing layer applications.

Abstract: Aqueous alkaline developable, UV curable urethane acrylate compounds and compositions are particularly useful for making flexible, 100% solids, solvent-free solder mask coatings which are characterized by having screen-printable viscosities, rapid developability and advantageous performance characteristics.

Abstract: This invention is directed to photocopolymerizable compositions comprising an epoxide containing two or more epoxy groups, a poly (active hydrogen) organic compound, a photoinitiator and, as a reactive diluent, a substituted cycloaliphatic monoepoxide. The photocopolymerizable compositions have low viscosity and can be applied to suitable substrates by conventional methods and, after being cured to dry coating films, can have utility as automotive finishes, can finishes, appliance finishes, general metal finishes, adhesives, printing inks and the like.

Abstract: This invention is directed to a thermal or radiation curable prepolymer, formulations containing same and processes of using same, said prepolymer comprising a liquid meth(acrylate) terminated polymeric hydrocarbon maleate having pendant maleate groups. Said prepolymer either per se or formulated with mono- or multi-functional unsaturated monomers and either a thermal or photoinitiator on exposure to heat or UV or high energy ionizing radiation forms a cured material utilizable as a printing plate, coating, adhesive or sealant.

Abstract: An improved transfer printing ink for printing indicia on impervious surfaces, such as glass, is comprised of a liquid resin component comprising one or more liquid acrylate monomers, one or more polyfunctional acrylate monomers, one or more polymeric binders and one or more photoinitiators. The transfer ink also is comprised of a solid component comprising one or more pigment materials and a particulate glass frit mixture. The glass frit mixture consists of a pluality of wetting agents and a frit flux. The wetting agents melt at an elevated temperature to fuse the pigments and the frit flux to the glass.

Abstract: This invention provides a photosetting resin composition suitable as a coating material for optical transmission glass fibers. Owing to the inclusion of a urethane-modified (meth)acrylate and a monoacrylate represented by the following general formula [I]:CH.sub.2 .dbd.CHCO(OC.sub.2 H.sub.4).sub.n OCH.sub.2 CH(C.sub.2 H.sub.5)(CH.sub.2).sub.3 CH.sub.3 [I]wherein n stands for an integer of 1-8, the photosetting resin composition enjoys a high photosetting speed and permits the formation of a coating film of a low modulus of elasticity. Moroever, the modulus of elasticity of the coating film has small temperature dependency at low temperatures. The present invention can hence provide light-transmitting glass fibers having excellent characteristics in optical transmission. The preferred monomer has been identified in the resin parts as 2-ethyl hexoxy ethyl acrylate, and also as 2-(2-ethylhexoxy) ethyl acrylate, and further as 2-[(2-ethylhexyl)oxy]ethyl acrylate.

Abstract: A photosetting polymer composition comprises:a base polymer comprising a denatured copolymer which is produced by reacting a copolymer of maleic anhydride and an unsaturated hydrocarbon compound with a specific aminocarboxylic acid, an alcohol or a cellosolve derivative, and a glycidyl (meth)acrylate compound under specific conditions;5-500 weight parts of a photopolymerizable monomer per 100 weight parts of the base polymer; and1-50 weight parts of a photopolymerization initiator per 100 weight parts of the base polymer.

Abstract: A curable resin composition comprising an isocyanuric ring-containing urethane-modified radical-polymerizable compound. The composition can give a protective coating having excellent surface mar resistance and improved secondary adhesion.

Abstract: Normally solid, organic solvent-soluble, thermoplastic, polyethylenically-unsaturated, cellulosic polyurethane polymers are provided. These cellulosic polyurethane polymers comprise one or more cellulose ether or ester segments, one or more alkylene moieties having at least two carbon atoms and which can be substituted or interrupted by ether oxygen atoms, ester groups, or phenylene groups, two or more residues of diisocyanates, the segments, moieties, and residues being linked together by linking groups with the proviso that said alkylene moieties contain sufficient ethylenic unsaturation that said polymer can be crosslinked to a solvent-insoluble state.

Abstract: Optical glass fiber having its glass surface adherently coated with an ultraviolet-cured coating of a liquid ultraviolet-curable coating composition is disclosed in which the composition comprises an ultraviolet-curable polymeric polyacrylate, a photoinitiator to render the composition curable with ultraviolet light, and from about 0.5% to about 5% of the coating composition of a polyalkoxy silane containing an organic substituent carrying a single mercaptyl hydrogen atom capable of reacting with acrylate unsaturation by Michael adduction. These compositions provide improved adhesion to the glass surface of the optical fiber which is well retained after exposure to high humidity atmospheres.

Abstract: Disclosed herein are novel diesters of (meth)acrylic acid represented by the following formula: ##STR1## wherein the mean values of m and n are respectively 0 to 5, preferably 0 to 3, the mean value of m+n is 1 to 10, preferably 1 to 6, and R represents H or CH.sub.3.Also, disclosed herein are resin compositions comprising said diester(s) of (meth)acrylic acid, polyurethane (meth)acrylate(s), monoethylenically unsaturated monomer(s) and initiator(s) of photopolymerization as an optional component.

Abstract: A light curing composition for dental restoration comprises (a) a polymerizable compound containing at least one ethylenically unsaturated double-bond, (b) at least one photo-polymerization initiator selected from ketal base compounds defined hereinafter, (c) at least one photopolymerization initiator selected from thioxanthone base compounds defined hereinafter, (d) a reducing agent and (e) a filler.

Abstract: Describes a process for controlling the polymerization and cross-linked density of electrophoretic gel products useful for separation of bioorganic molecules, which process does not use initiators common to processes of the art. Electron beam polymerized gels afford the desired advantages of being ultra thin and having a high electrophoretic resolution with programmable porosity profiles.

Abstract: Described herein are compositions suitable for photocopolymerization comprising a cyclic vinyl ether containing compound and an epoxide. These compositions can be cured to give coatings with improved flexibility and impact resistant properties.

Abstract: A light curable pit and fissure sealant composition comprises 2,2-propane-bis [3-(4-phenoxy)-1,2-dihydroxy-propane-1- methacrylate] and triethylene glycol dimethacrylate in a 55:45 weight ratio, a polymerization initiator, titanium dioxide as an opaquing agent, and DEA-EMA of at least 95 percent purity as the polymerization accelerator. Optionally, up to 50% filler can be used.

Abstract: A thermosetting resin composition of highly satisfactory storage stability comprises 100 parts by weight of a thermosetting resin composition, 0.0001 to 2.0 parts by weight of a thiuram compound possessing at least one atomic group represented by the following formula: ##STR1## wherein p stands for an integer in the range of 1 to 8, and 0.00001 to 0.1 part by weight (as copper metal) of a copper-containing compound.

Abstract: A photopolymerizable epoxy resin composition comprising (a) an epoxy resin and (b) a heteropoly-acid aromatic sulfonium salt or a heteropoly-acid aromatic iodonium salt as a photocuring catalyst exhibits rapid photopolymerization, with the cured product being great in hardness, the corrosive action being weak, and the electrical properties being excellent. The industrial utility of the composition is therefore substantial.

Abstract: A photocurable composition comprising (1) an epoxy compound having at least one epoxy group and at least one unsaturated double bond in the same molecule; (2) a metal compound present in an amount ranging from 0.001 to 10 wt. %, based on the epoxy compound; and (3) a silicon compound which is capable of forming a silanol group when irradiated with light and which is present in an amount ranging from 0.1 to 20 wt. %, based on the epoxy compound, is characterized by a particularly rapid curing rate.

Abstract: Compounds of formula X ##STR1## in which R.sub.6 is aryl, R.sub.7 is hydrogen, --OH or alkyl, R.sub.8 is alkyl, R.sub.9 is hydrogen, alkyl, alkenyl, aryl, furyl or --CCl.sub.3, when n is 1, R.sub.10 is alkyl, aryl, camphoryl, --CF.sub.3 or fluoro, or when n is 2, R.sub.10 is alkylene or arylene are latent curing catalysts for acid-curable stoving varnishes. On irradiation, the active curing catalysts which lead to acid-catalysed curing of the resins are formed from the compounds of the formula x.