Abstract: There is provided an energy beam curable resin composition which comprises as an essential component a cationically polymerizable substance and an effective amount of an onium salt of a Lewis acid represented the following formula (I). ##STR1## [where X is a sulfonio group represented by the following formula (II)]. ##STR2## (where at least one of R.sub.1 -R.sub.10 is (A) a C.sub.1 -C.sub.18 aliphatic group having at least one hydroxyl group or (B) a C.sub.3 -C.sub.19 aliphatic group having a group of --OCH.sub.2 CH.sub.2 O--).

Abstract: A photo-curable resin composition containing urethane oligomer compounds represented by a following general formula (I) ##STR1## [wherein R.sub.1 indicates --H or --CH.sub.3. R.sub.2 indicates an alkylene group with or without side chain having 1 to 6 carbon atoms or --(--CH.sub.2 CH.sub.2 --O--).sub.m --CH.sub.2 CH.sub.2 --, m=1-5. R.sub.3 indicates a substituent selected from a group comprising ##STR2## n is a number selected from integers 1 to 10 so as the molecular weight of compound to be not more than 5000] as a part or the whole of base resin.

Abstract: A new class of polymeric or polymerizable aromatic-aliphatic ketones, the preferred of which are: 2-hydroxy-2-methyl(4-vinylpropiophenone), 2-hydroxy-2-methyl-p(1-methylvinyl)propiophenone, p-vinylbenzoylcyclohexanol, p-(1-methylvinyl)benzoyl-cyclohexanol and their oligomerization and polymerization products, they being suitable for use as photoinitiators for the photopolymerization of ethylenically unsaturated monomers and prepolymers.Said ketones are produced by subjecting an aromatic substrate, preferably a monomer or oligomer of styrene type, to the following reaction cycle: polymerization - acylation - alphachlorination - nucleophilic substitution with the formation of epoxyether - hydrolysis of the epoxyether; or to other reactions as modifications or alternatives to this cycle.The ketones according to the present invention have high efficiency as photoinitiators both with regard to the useful concentration to be used and with regard to the polymerization rate.

Abstract: A photopolymerizable composition composed of a polymerizable monomer and an initiator capable of polymerizing said monomer upon exposure to visible light, characterized in that said initiator consists essentially of (a) at least one kind of photosensitizer selected from an .alpha.-diketone, quinone, and derivatives thereof, and (b) at least one kind of accelerator selected from an aldehyde containing no amino groups and derivatives thereof.

Abstract: There is disclosed a photo-curable epoxy resin type composition comprising an epoxy resin, an aluminum compound, a silicon compound having a peroxysilyl group and a photosensitizer.The compositions of the present invention can suitably be used for wide varieties of electrical applications.

Abstract: Photopolymerizable mixtures comprising one or more photopolymerizable, olefinically unsaturated compounds and one or more photoinitiators or photosensitizers, with or without other conventional additives and/or assistants, contain, as an activator, a tertiary amine of the general formula (I) ##STR1## wherein R.sup.1 and R.sup.2 are each an unsubstituted alkyl, cycloalkyl or phenyl radical, hydroxyl or alkoxy, or R.sup.1 and R.sup.2 are bonded together to form a cyclic alkylene radical, R.sup.3 has the same meanings as R.sup.1 or R.sup.2 and may furthermore be hydrogen, acyloxy or substituted benzoyloxy, and R.sup.4 and R.sup.5 are each an unsubstituted or substituted alkyl, cycloalkyl or phenyl radical, or R.sup.4 and R.sup.5 are bonded together to form a cyclic alkylene or alkyleneoxyalkylene radical.

Abstract: Prepregs which are tacky to dry to the touch can be prepared by impregnating a solid reinforcing material with a liquid, solvent-free composition containing (a) an epoxide resin, (b) a photopolymerizable compound, (c) a heat-activatable curing agent for the epoxide resin (a) and, if appropriate, a photopolymerization catalyst for the photopolymerizable compound (b), and the composition is exposed to actinic radiation. The composition solidifies thereby to give an essentially solid layer as the result of photopolymerization of the photopolymerizable compound, whereas the epoxide resin remains substantially in a heat-curable state. In accordance with the invention, a substituted or unsubstituted aliphatic, cycloaliphatic or araliphatic amine is used as the heat-activatable curing agent (c), and the photopolymerizable compound (b) is employed in such a ratio to the heat-curable component (a) that, after irradiation with actinic light, the composition can still be shaped by thermoplastic methods.

Abstract: Polyorganosiloxanes having an average of more than two siloxane repeat units, at least one of which repeat units includes a photoinitiating group bound to the silicon atom thereof, the photoinitiating group having the formula ##STR1## where R.sup.1 and R.sup.2 are the same or different alkyl groups or R.sup.1 and R.sup.2 are alkylene groups linked to each other so that R.sup.1 and R.sup.2 together with the carbon atom to which both are attached comprise a cycloalkyl group, and R.sup.3 is H or hydrocarbyl.Compositions of these polyorganosiloxanes and silicones or organic monomers with free radical curable groups are readily cured by irradiation with UV light.

Abstract: Disclosed herein is a photopolymerizable composition comprising poly-N-vinylpyrrolidone (A); a compound (B) represented by the formula (I): ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 represents a hydrogen atom or a methyl group; an acid amide (C) represented by the formula (II): ##STR2## wherein R.sup.4 represents a hydrogen atom or a methyl group and a monomeric compound (D) having an acryloyl group or a methacryloyl group in the molecule thereof as well as optionally a photopolymerization-initiator (E).

Abstract: This invention is directed to photocopolymerizable compositions comprising an epoxide containing two or more epoxy groups, a polymer/poly (active hydrogen) organic compound and a photoinitiator. The cured coating compositions exhibit a clear appearance, good water resistance and can have utility as automotive finishes, can finishes, appliance finishes, general metal finishes, adhesives, printing inks, and the like.

Abstract: Michler's ketone analogs and salts thereof, which are photosensitizers in water-soluble photoinitiator systems used to induce polymerization in free-radically-curable, ethylenically-unsaturated materials, are disclosed. The Michler's ketone analogs have the formula: ##STR1## wherein each R is an alkyl group of 1 to 8 carbon atoms,R.sup.1 is an alkylene group having 1 to 8 carbon atoms,Z is R.sup.1 COOH or R.sup.1 H, andn is an integer having a value of 1 or 2.The photoinitiator systems are useful in imaging systems, and additionally contain a free radical initiator compound selected from iodonium salts, biimidazoles, trialkylphosphites, alkyl peroxides, benzyl halides, alkyl nitrates, and the benzophenones other than (a).

Abstract: A photocurable composition consisting essentially of the mixture of a diisocyanate compound, a polyol and certain UV light sensitive organotin compounds. The photocurable composition is cured by exposing it to ultraviolet light in the wavelength range of 2000 to 4000 Angstroms for a period of about 0.1 second to about 20 minutes at a temperature in the range of about 0.degree. F. to about 180.degree. F.

Abstract: UV curable coating compositions are provided based on the use of photoinitiator with the hydrolysis product of silylacrylate and aqueous colloidal silica. The UV curable silicone coating compositions also can contain polyfunctional acrylate. The UV curable hardcoat composition can be applied onto various substrates, for example, a polycarbonate substrate, and thereafter cured under UV radiation to produce adherent and abrasion resistant coated articles.

Abstract: The invention relates to an optically readable information disk, a method of manufacturing same, as well as a device for carrying out the method, in which the information disk which comprises an optically readable information track of information areas situated at a higher and a lower level, is manufactured entirely from a radiation-cured layer of a lacquer containing oligomeric acrylates or methacrylates which on an average per molecule comprise between one and four acrylate groups or methacrylate groups, has a viscosity of 1,000-15,000 cP and comprises a photoinitiator in a concentration of 0.1 to 0.5% by weight. Suitable lacquers comprise notably 1,1'-isopropylene-bis(p-phenoxyethylmethacrylate) or 1,1'-isopropylene-bis(p-phenoxyethylacrylate).

Abstract: Photopolymerizable composition, especially for dental purposes, which contains as photopolymerizable olefin compounds especially acrylic and/or methacrylic compounds as well as a ketone and an amine as activating substances. The amine has the general formula ##STR1## wherein the symbols have the following meanings: X represents cyan or halogen,R represents the group X--CH.sub.2 --CH.sub.2 -, an alkyl group of 1 to 6 carbon atoms, or a hydroxyl group of 2 to 6 carbon atoms, an acrylic, methacrylic or vinyl group, andR.sub.1 represents a substituted or unsubstituted phenyl, benzyl or styryl radical, orR and R.sub.1 together form an alkylene group of 4 to 5 carbon atoms, the amine being able to be present also in polymeric form if in the monomer R represents an acrylic, methacrylic or vinyl group and/or R.sub.1 represents the styryl radical.

Abstract: A water soluble composition including an amine or ammonium salt of a polyimide precursor which is obtained by the reaction steps of: reacting a tetracarboxylic compound and a diamine in about equimolar amounts in a water miscible organic solvent to obtain the polyimide precursor; and reacting the polyimide precursor with ammonia, or an aqueous solution of ammonia, or a primary or secondary aliphatic amine in an amount sufficient to neutralize the free carboxyl groups of the polyimide precursor.A process of coating and a substrate are also disclosed.

Abstract: Thermally coalescible acrylic resin dispersions comprising particles of single-phase, surfactant-free, random acrylic polymers or copolymers, containing at least 80% by weight of acrylic units, dispersed in a surfactant-free medium that comprises a compatible liquid plasticizer that is nonvolatile at room temperature and is not a monomer of any of the polymeric components. Incorporation of a photopolymerizable, ethylenically unsaturated compound provides photosensitive dispersions useful for making relief and planographic printing plates, photoresists, and the like.

Abstract: Compositions hardenable by exposure to heat or electromagnetic radiation are provided by blending from about 0% to about 50% by weight of an uncrosslinked polymer, from about 20% to about 66% of a polymerizable monomer capable of dissolving said polymer, from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters of from 0.001 micron to about 500 microns and being swellable by said monomer, and from about 0.25% to about 27% of a crosslinking agent for said monomer. Such compositions exhibit superior chemical and physical characteristics when hardened and are suitable in a wide variety of applications as construction media. In accordance with a preferred form of the invention, a precursor blend is formed from a mixture comprising (A) from 13 to 52 weight percent of a crosslinked polymer of an ester of a C.sub.1 -C.sub.6 alkyl acrylic acid and a C.sub.1 -C.sub.

Abstract: Portable ice making container apparatus is provided for making blocks of ice. An inner container is used to receive water which is to be frozen to form a block of ice. A larger outer container is provided to receive and support the inner container therein. Support posts are provided at the bottom of the outer container to position the bottom of the inner container a short space above the bottom of the outer container. Flanges are disposed at the tops of both containers to interconnect the containers for the purpose of maintaining them in a nested, spaced-apart relationship. A cover member has walls constructed to fit snugly against the walls of the inner container to enclose the top of the inner container. The walls extend downward to a common bottom to form a recess for containing fluid to warm the bottom of the cover member. The outer container includes receptacles at the corners for receiving fluid to be dispersed throughout the space between the inner and outer containers.

Abstract: Disclosed is a solvent-free wire enamel cement coat which is curable to the B-stage with ultraviolet light. The wire can then be formed into a coil and cured with heat to the C-stage. The cement coat composition comprises a mixture of a UV photosensitizer and a curing agent with either an acrylated epoxy or an amine terminated acrylated epoxy or an acrylated urethane, or mixtures thereof, all dissolved in a monoacrylate. The composition can also include an end-blocked urethane, an acrylated hexamethoxymethyl melamine, or a low molecular weight cresol formaldehyde resin.