Abstract: A UV curable organic solvent soluble, aqueous nonalkaline soluble and peelable temporary solder mask composition to be applied to a surface to be protected, having a reactive diluent monomer capable of polymerization upon exposure to ultraviolet light and a photoinitiator serving as a free radical source to initiate polymerization.

Abstract: The invention relates to adhesive compositions comprising terpolymers C.sub.6 to C.sub.10 unsaturated .alpha.-olefin monomers, C.sub.2 to C.sub.5 .alpha.-olefin monomers and polyene monomers and an effective amount of photoactive cross-linking agent to cross-link composition upon radiation from a source of active radiation.

Abstract: Photoinitiators having a terminal fluoroalkyl moiety are useful for photopolymerizing and photocuring fluorinated as well as non-fluorinated monomers, especially fluorinated acrylic monomers.

Abstract: A UV and moisture-curable organopolysiloxane composition comprising (i) an organopolysiloxane terminated with a radical of formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom or monovalent hydrocarbon radical, each of R.sup.2 and R.sup.3 is a divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R.sup.4 and R.sup.5 is a monovalent hydrocarbon radical which may contain an ether bond, and a is equal to 0 or 1, (ii) a photo-polymerization initiator, and (iii) a curing catalyst. The composition readily cures either upon exposure to UV radiation or upon contact with moisture and from the surface to the deep interior within a short time, yielding cured products having satisfactory physical properties.

Abstract: Vulcanizable organopolysiloxane compositions comprise a hydroxy-terminated organopolysiloxane, an acrylic or methacryllc functional alkoxy silane, a divalent tin compound, an alkoxy-.alpha.-silyl ester, a photopolymerization initiator, and a curing catalyst whereby the composition is cured by UV irradiation and/or by the action of moisture in air. The composition has good shelf stability and can yield rubber elastomers having good physical properties.

Abstract: A process is described for photoinitiated control of inorganic network fotion in the sol-gel process, which comprises eitherA) subjecting one or more hydrolytically polycondensable compounds of constituent elements of glass or ceramic, excluding silicon compounds containing polymerizable organic groups, to hydrolytic polycondensation in a liquid reaction medium to form a sol andirradiating the resulting sol in a structured or unstructured manner in the presence of a photoinitiator which can change the pH of the reaction medium on irradiation, using radiation of a wavelength range in which the photoinitiator absorbs;orB) liberating water in an anhydrous reaction medium which contains an alcohol, one or more hydrolytically polycondensable compounds of constituent elements of glass or ceramic and a photoinitiator which can liberate water by a photochemical reaction or a secondary reaction when irradiated, by structured or non-structured irradiation using radiation of a wavelength range in which the photoinitiato

Abstract: A radiation curable coating composition comprising acrylate oligomers and monomers, vinyl ether monomers, and a free radical photoinitiator. The vinyl ether monomers replace N-vinyl-pyrrolidone or other undesirable reactive diluents while retaining or modifying the properties of coatings using such diluents.

Abstract: Ultraviolet radiation-curable primary and secondary coating compositions for optical fibers are disclosed. The primary coatings comprise a hydrocarbon polyol-based reactively terminated aliphatic urethane oligomer; a hydrocarbon monomer terminated with at least one end group capable of reacting with the terminus of the oligomer; and an optional photoinitiator. The secondary coatings comprise a polyester and/or polyether-based aliphatic urethane reactively terminated oligomer; a hydrocarbonaceous viscosity-adjusting component capable of reacting with the reactive terminus of (I); and an optional photoinitiator. Also disclosed are optical fibers coated with the secondary coating alone or with the primary and secondary coatings of the invention.

Abstract: Photocurable silicone compositions based on capping of a silicone with a silyl diacrylate capper of the formula ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R .sub.10 are independently selected from hydrogen, halo, and organo radicals; and n is an integer having a value of from 1 to 4.In specific embodiments, the compositions include a polymodal-cure resin composition comprising an acryloxy-functional capped silicone, and a photocurable silicone gel composition and precursor thereof.

Abstract: A free-radical radiation curable composition comprising:a) at least one compound containing one to six vinyl ether groups; andb) at least one compound containing a urethane backbone with one to six maleate and/or fumarate end groups,wherein the ratio of vinyl ether groups to maleate and/or fumarate groups is in the range of about 1 to about 1:5.

Abstract: A free-radical radiation curable composition comprising:a) at least one compound containing from one to about six vinyl ether groups; andb) at least one compound containing a saturated backbone and at least one maleate or fumarate end group per molecule,wherein the ratio of vinyl ether groups to maleate or fumarate groups in the composition is in the range of about 5:1 to about 1:5.

Abstract: A free-radical radiation curable composition comprising:a) at least one compound containing from one to about six vinyl ether groups; andb) at least one product obtainable by the reaction of a half-ester of maleic and/or fumaric acid with an epoxy functionalized compound,wherein the ratio of vinyl ether groups to maleate and/or fumarate groups is in the range of about 5:1 to about 1:5.

Abstract: The present invention is directed to a non-emissive, bimodal cured polymeric network which has an onset degradation temperature that is about 100.degree. C. above the onset degradation temperature of a base polymer. The novel cured polymeric network comprises the cured reaction product of the following ingredients: (a) combination of one or more liquid carrier monomers or prepolymers which combination is reactive to form a base polymer by exposure to ultraviolet (UV) radiation in the presence of a UV photosensitizer at a temperature, T.sub.uv ; and (b) between about 10 and 100 wt-% based on ingredient (a) of a combination of one or more monomers or prepolymers which combination is reactive to form a cured high temperature stable polymer by heating at a temperature, T.sub..DELTA.. Ingredient (b) is soluble or dispersible in ingredient (a) at a temperature, T.sub.s, wherein T.sub.s is equal to or lower than T.sub.uv, and T.sub.uv is at least about 50.degree. C. lower than T.sub..DELTA..

Abstract: The present film-former composition comprises (a) an organosilazane copolymer having a perfluoroalkyl group-containing structural unit and a methacryloyloxy group-containing structural unit, (b) a photosensitizer soluble in an organic solvent, and (c) an organic solvent. The composition is cured by irradiation with ultraviolet light for a short period of time to form a film excellent in water repellency, oil repellency, and hardness.

Abstract: Liquid highly active photoinitiators are obtained by dissolving a solid photoinitiator of the titanocene type in liquid photoinitiators of the acetal or ketal type. The liquid mixtures have a long dark storage stability.

Abstract: A photopolymerizable rubber being obtained by copolymerizing four compounds consisting of a dienic liquid rubber having hydroxyl groups, an ethylenically unsaturated monomer having hydroxyl groups, a dihydric alcohol having a molecular weight of less than 2,000 and a diisocyanate compound. The photocured product of this composition has higher tensile strength and elongation than that of the prior photopolymerizable rubbers.

Abstract: The invention relates to a breathable, plastic film, useful as a wall covering material. A low boiling additive, such as water, is added to a plastisol before extrusion. During extrusion and curing of the plastisol into a film or coating, the low boiling additive is volatilized and the resulting evolved gas perforates the forming film. In this manner a permeable plastic film, such as vinyl, is produced.

Abstract: The present invention relates to a silicone coating composition which, when cured on a solid substrate either by ultraviolet or electron beam radiation, provides a transparent abrasion resistant coating firmly adhered thereon. The silicon coating is prepared by reacting at least one multifunctional acrylate monomer with an amino-organofunctional silane, mixing the modified silane with at least one acrylic monomer and thereafter adding colloidal silica.

Abstract: The heat stability of acrylamide functional polydiorganosiloxanes which cure by exposure to ultraviolet radiation can be improved by the addition of nickel carboxylate, stannous naphthenate, cerium carboxylate, manganese carboxylate, aluminum carboxylate, silver carboxylate, copper undecylenate, cobalt carboxylate, mono(methacrylate) tripropoxyzirconate, mono(ethylacetoacetonate) aluminum di-(sec-butoxide), di-(ethylacetoacetonate) aluminum sec-butoxide, zinc acetylacetonate, molybdenum acetylacetonate, and dibutyltin dicarboxylate.

Abstract: An optical molding composition is used for casting and does not cause irritation to the skin or possess a bad smell. This composition comprises1. an actinic radiation-curable, radical-polymerizable organic compound comprising(1) one or more polythiol compounds and(2) one or more polyene compounds each having at least two actinic radiation-reactive carbon-to-carbon double bonds in the molecule, and2. an actinic radiation-sensitive radical polymerization initiator.

Abstract: An acryloxy-functional capped silicone formed as a reaction product of:(i) a silyl diacrylate compound of the formula ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently selected from hydrogen, halo, and organo radicals; and n is an integer having a value of from 1 to 4; and(ii) a silicone having (A) functionality which is reactive with an acryloxy functionality of the silyl diacrylate compound, and (B) additional functionality imparting (directly or by reaction with a co-reactant) further curability to the silicone by another modality (e.g., moisture curability, heat curability, etc.)The capped polyfunctional silicone may suitably be formulated with (a) an effective amount of a photoinitiator for partial curing of the acryloxy-functional capped silicone under photoinitiating curing conditions, and (b) suitable curatives, initiators, accelerators, etc.

Abstract: The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.--(where .phi. stands for ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 --(where .phi.' stands for and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive interger; and X is hydrogen or methyl group. The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo-polymerization initiator, which can be cured at room temperature within a short time by irradiation with UV rays to form a cured product having a refractive index N.sub.D.sup.20 ranging from 1.434 to 1.532.

Abstract: Highly fluorinated alkyl group substituted acetophenones and benzophenones suitable for use as initiators for the polymerization of ethylenically-unsaturated monomers in which conventional initiators have limited solubility. These compounds are particularly suitable for use for the polymerization of highly fluorinated ethylenically-unsaturated monomers.

Abstract: The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.-- (where .phi. stands for ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 -- (where .phi.' stands for ##STR3## and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive integer; and X is hydrogen or methyl group. The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo polymerization initiator, which can be cured at room temperature within a short time by irradiation with an UV ray to form a cured product having a refractive index n.sub.D.sup.20 ranging from 1.434 to 1.532.

Abstract: The invention provides a high-sensitivity ultraviolet-curable organopolysiloxane composition suitable for use as a surface-release treatment of various substrate such as release-paper sheets and the like. The composition comprises, as the essential ingredients, (a) an organopolysiloxane having a viscosity in the range from 50 to 3000 centipoise at 25.degree. C. and containing, in a molecule, at least one (meth)acryloxy-substituted monovalent hydrocarbon group or at least one epoxy- or glycidyloxy-substituted monovalent hydrocarbon group, and (b) a sulfonate compound such as 2-hydroxy-3-oxy-2,3-diphenylpropyl methanesulfonate as the photopolymerization initiator. The sensitivity of the composition to photopolymerization can be further increased by the addition of a specific salt such as sodium hexafluoroantimonate and sodium hexafluorophosphate.

Abstract: A silicone composition comprising:(a) a first silane of the formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently selected from hydrogen, halo, and organo radicals; andn is an integer having a value of from 1 to 4;(b) a second silane of the formula: ##STR2## wherein: R.sub.11 and R.sub.16 are non-polymerizable groups and are independently selected from halo and organo radicals;R.sub.12, R.sub.13, R.sub.14, and R.sub.

Abstract: An acryloxy-functional capped silicone formed as a reaction product of:(i) a silyl diacrylate compound of the formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are independently selected from hydrogen, halo, and organo radicals; andn is an integer having a value of from 1 to 4; and(ii) a silicone having at least one functionality which is reactive with an acryloxy functionality of the silyl diacrylate compound to yield the acryloxy-functional capped silicone.The capped silicone may suitably be formulated with an effective amount of a photoinitiator for curing of the acryloxy-functional capped silicone under photoinitiating curing conditions. The silicone functionality which is reactive with the acryloxy functionality of the silyl diacrylate compound may be --OH, or other labile hydrogen-containing substituent. Preferably, the silicone is a hydroxy-terminated linear polydiorganosiloxane.

Abstract: Compositions which cure by UV radiation in less than one second are obtained by mixing an alkenyl containing polydiorganosiloxane, a mercapto functional crosslinker of the mercapto functional polyorganosiloxane or mercapto organic compounds, a photosensitizer, a viscosity stabilizer, and optionally a reinforcing agent. These compositions can be packaged in one container and can be used as the primary coating for optical fibers.

Abstract: A resin composition, particularly for an ink printing composition, comprising a polyurethane (meth-) acrylate resin, N-vinylpyrrolidone, and acryloylmorphline, with a photoinitiator when used as an ultraviolet raycurable ink printing composition, and without a photoinitiator when used as an electron beam-curable ink printing composition.

Abstract: Compositions which cure by UV radiation in less than one second are obtained by mixing an alkenyl containing polydiorganosiloxane, a mercapto functional crosslinker of the mercapto functional polyorganosiloxane or mercapto organic compounds, a photosensitizer, a viscosity stabilizer, and optionally a reinforcing agent. These compositions can be packaged in one container and can be used as the primary coating for optical fibers.

Abstract: An ultraviolet-hardenable adhesive for bonding a non-water swellable, ophthalmic-lens to a support member, in producing a non-water swellable ophthalmic lens, the adhesive containing at least one photopolymerizing monomer, and at least one photoinitiator, the at least one photopolymerizing monomer being selected from the group consisting of acrylates or methacrylates represented by following general formulas (I) and (II): ##STR1## wherein R.sub.1 is hydrogen or methyl,R.sub.2 is hydrogen or methyl,R.sub.3 is hydrogen or methyl,m is a positive integer from 2 to 20, andn is a positive integer from 1 to 5.A method of bonding a lens blank to a support member with an adhesive, and a processing of manufacturing a lens using an adhesive, are also disclosed.

Abstract: Compounds of the formula I ##STR1## in which n is 1-30 and X, Y, R, Ar.sup.1 and Ar.sup.2 are as defined in claim 1 can be prepared by reaction of a benzil dialkyl ketal with a diol. Depending on the molar ratio of the two reaction components, products having a different polycondensation degree n are obtained. the compounds can be used as photoinitiators.

Abstract: The invention provides a photosensitive resin composition useful as a solder resist, etching resist or plating resist in the manufacture of printed circuit boards to exhibit excellent resistance against heat and chemicals and good adhesion to the substrate surface. The composition essentially comprises (a) a copolymeric resin of an .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and an ethylenically unsaturated polymerizable compound, of which the acid anhydride units are partially esterified with an unsaturated alcohol and a saturated alcohol, and (b) a photopolymerization initiator. The composition may further comprise optional ingredients such as (c) a photopolymerizable monomeric compound, (d) an epoxy-based resin and (e) an aromatic diamine compound.

Abstract: The invention relates to a composition containing UV curable unsaturated monomers and/or oligomers, a photoinitiator and colloidal silica with an organosilane compound, a polyalkoxysilane being used as organosilane compound and the composition containing an acid catalyst.

Abstract: The invention relates to a pressure-sensitive thermosetting adhesive comprising from about 30% to about 80% by weight of a photopolymerizable prepolymeric or monomeric syrup containing an acrylic ester and a polar copolymerizable monomer, from about 20% to about 60% by weight of an epoxy resin or a mixture of epoxy resins containing no photopolymerizable groups, from about 0.5% to about 10% by weight of a heat-activatable hardener for the epoxy resin, from about 0.01% to about 5% of a photoinitiator, and from 0% to about 5% of a photocrosslinking agent. In a preferred embodiment, imidazoles and thermally expandable thermoplastic microspheres are utilized in the inventive adhesive formulation.

Abstract: Radiation-curable two-layer systems containing immobilized photoinitiators are suitable for the production of coatings of constant thickness and good adhesion, and relief structures of high resolution and edge steepness.

Abstract: The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.-- ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 -- ##STR3## and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive integer; and X is hydrogen or methyl group.The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo polymerization initiator, which can be cured at room temperature within a short time by irradiation with an UV ray to form a cured product having a refractive index n.sub.d.sup.20 ranging from 1.434 to 1.532.

Abstract: Compounds of the general formula I ##STR1## wherein Z is CR.sup.1 R.sup.2 (OR.sup.3) or phenyl,R.sup.1 being H, C.sub.1-6 -alkyl or phenyl,R.sup.2 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy andR.sup.3 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkanoyl andZ' is Y-[(CH.sub.2).sub.m -X].sub.n -,X being CH.sub.2 or 0,Y being OH; COOH or SO.sub.3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C.sub.1-20 -alkyl or C.sub.1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, andn and m each being the numbers 1-4, are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.

Abstract: An aqueous photopolymer composition is produced by adding a monomer to a latex of a partially neutralized carboxylated acrylic copolymer, having an acid number greater than 80, along with photoinitator and components to produce an aqueous coatable and alkali developable photoresist composition. Preferred neutralization is 30-50% for dip-coating and 40-60% for screen-printing to produce 1 mil lines and 1 mil space after ultraviolet exposure and mild alkali development.

Abstract: A photocurable adhesive composition comprising a phenoxy resin; a reaction product of an unsaturated carboxylic acid and epoxidized non-linear novolak; reaction product of an unsaturated carboxylic acid and a tetrabrominated diglycidyl ether of a phenol; monohydroxy dipentaerythritol acrylate and/or pentaerythritol tetraacrylate; polyethylenically unsaturated compound; and photoinitiator, and optionally, hexamethylol melamine-formaldehyde; and/or a thixotropic agent; and use thereof.

Abstract: Liquid, photocurable coating compositions containing nitrile copolymers. Such compositions comprises from about 10 percent to about 60 percent by weight of a high nitrile copolymer, containing at least about 70 percent by weight of a nitrile polymer; from about 30 percent to 90 percent by weight of a photopolymerizable solvent for the high nitrile copolymer, wherein the photopolymerizable solvent is selected from the group consisting of N-vinyl pyrrolidone, cyanoethylacrylate, styrene, N,N-dimethylacylamide, N,N-methylenebisacrylamide, gamma-butyrolactone and combinations thereof, and from about 0.1 percent to about 10 percent by weight of a photoinitiator soluble in the photopolymerizable solvent for curing the high nitrile copolymer with the incorporation of at least 50 percent by weight of the solvent therein upon exposure to ultraviolet radiation, having a wavelength of from about 2000 .ANG. to 14,000 .ANG.

Abstract: A composition curable to a solid crosslinked polyorganosiloxane comprises:(a) an acrylic functional silicone prepolymer having a plurality of acrylic groups of the formula: ##STR1## bound to silicon atoms thereof, where R is H or methyl, and R.sup.1 is a divalent olefinically unsaturated hydrocarbon group,(b) a silicone prepolymer having a plurality of organothiol groups thereon, and(c) an effective amount of a thiol-ene cure catalyst.Particularly preferred formulations are photoinitiated formulations employing alkylthiol functional silicones in which the total number of thiol groups is between 0.5 and 1.5 times the total number of ene groups counting both the acrylic and the linking group R.sup.1 as ene groups.

Abstract: Compositions which cure by UV radiation in less than one second are obtained by mixing an alkenyl containing polydiorganosiloxane, a mercapto functional crosslinker of the mercapto functional polyorganosiloxane or mercapto organic compounds, a photosensitizer, a viscosity stabilizer, and optionally a reinforcing agent. These compositions can be packaged in one container and can be used as the primary coating for optical fibers.

Abstract: A stereolithographic method which employs an ultraviolet-curable liquid composition adapted to cure rapidly to a lightly cross-linked solvent-swellable three-dimensional complexly-shaped polymeric thin-walled element constituted by heat-softenable solid polymer upon exposure to ultraviolet dosage in the range of about 0.1 to about 10 Joules per square centimeter and which possesses reduced distortion comprises, from 20 to 80 weight percent, of a resinous polyacrylate or polymethacrylate dissolved in a combination of 10 to 45 weight percent of a liquid polyacrylate or polymethacrylate, which is preferably trifunctional, and 10 to 45 weight percent of liquid N-vinyl monomer, preferably N-vinyl pyrrolidone. Thus, the weight ratio of polyacrylate: polymethacrylate: N-vinyl monomer is about 1:2:2 to about 8:1:1. One of the foregoing polyacrylates or polymethacrylates is a polyacrylate and the other is a polymethacrylate so that good cure speed is accompanied by good distortion resistance.

Abstract: A conjugated diene copolymer comprising (A) 40 to 90 mole % of a conjugated diene component, (B) 0.5 to 10 mole % of an alpha,beta-ethylenically unsaturated carboxylic acid component, (C) 0.1 to 5 mole % of a polyfunctional alkenyl compound component and (D) 5 to 58 mole % of a monoolefinically unsaturated compound component wherein the intrinsic viscosity [.eta.] of the copolymer as measured at 30.degree. C. in dimethylformamide is 0.01 to 3.0 dl/g, the width (.DELTA.Tg) of the endothermic transition temperature section determined by a differential scanning calorimetry is 45.degree. to 120.degree. C. and the limit temperature (T.sub.1) on the lower temperature side of the endothermic transition temperature section is -40.degree. C. or less.

Abstract: The ultraviolet-curable organoploysiloxane composition of the invention comprises (A) an organopolysiloxane having bonded to a silicon atom thereof a silyl-substituted ethyl group represented by the general formula[CH.sub.2 .dbd.CR.sup.1 --CO--O--(--CH.sub.2 --).sub.a --SiR.sup.2.sub.2 --](R.sup.2 .sub.3 Si--O--).sub.c R.sup.2.sub.2--c Si--C.sub.2 H.sub.4 --,in which R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a monovalent hydrocarbon group, a is 1, 2 or 3 and c is 1 or 2, and (B) a photopolymerization initiator. The composition is rapidly cured by ultraviolet irradiation into a gel-like material having adhesiveness without the disadvantages of catalyst poisoning and undue volume shrinkage so that the composition is useful as a potting agent in electronic and electric components.

Abstract: A photocured acrylic coat comprised of the photoreaction products of:(i) at least one photocurable polyfunctional acrylate monomer;(ii) at least one phenyl ketone photoinitiator; and(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylates, and hydroxybenzophenones. The coating is substantially completely or completely cured and provides improved protection to the substrate against ultraviolet radiation. The coating is also nonopaque or transparent.

Abstract: A photocured acrylic coating comprised of the photoreaction products of:(i) at least one photocurable polyfunctional acrylate monomer;(ii) at least one acetophenone photoinitiator; and(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylate, and hydroxybenzophenones. The coating is substantially or completely cured and provides improved protection to the substrate against ultraviolet radiation.

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: The disclosed wound dressings have a drug dispersed throughout a polyurethane matrix that is the reaction product of: (A) An isocyante terminated prepolymer formed by reaction of isophorone diisocyanate and a marcoglycol and (B) a monomer containing hydroxyl and vinyl groups. The reaction product is a vinyl terminated polyurethane oligomer which is liquid at room temperature and which may be readily admixed with a pharmacoactive substance and a photosensitizer, formed into a film and cured by exposure to UV light without release of heat.In the most preferred embodiments the foregoing oligomer is codissolved in an organic solvent with a polyurethane polymer which is the reaction product of:dicyclohexyl methane diisocyanate;a polytetramethylene ether polyol having a molecular weight in the range of 1000-3000 daltons; and1,4-butane diol.That solution is then admixed with the pharmacoactive agent, formed into a film and cured.