Abstract: A curable composition comprising (a) an epoxy resin, (b) a hardener if necessary, (c) an anthraquinone of formula I ##STR1## wherein R.sup.1 is --COOH or a radical of formula II ##STR2## wherein n is 0 or a number from 1 to 12, R.sup.2 is H, C.sub.1 -C.sub.12 -alkyl or --CN and R.sup.3 is H, --CN or the radical --C.sub.m H.sub.2m X, where m is 0 or a number from 1 to 12 and X is --COOH or --CN, and (d) an amino alcohol. The cured compositions are photosensitive and are suitable for the preparation of metallic coatings and images by electroless metal deposition.

Abstract: Anthraquinones of formula I ##STR1## wherein X is the group --CR.sup.2 R.sup.3 --, where R.sup.2 is H, --CH or C.sub.1 -C.sub.5 -alkyl and R.sup.3 is H or --CN, R.sup.1 is H or C.sub.1 -C.sub.5 -alkyl and R is a direct bond or linear or branched C.sub.1 -C.sub.18 -alkylene which, alone or together with the --CR.sup.2 R.sup.3 -- group, can be interrupted by one or more --O-- when R.sup.2 and/or R.sup.3 are not --CN, and curable compositions comprising (a) an epoxy resin, (b) a hardener if necessary, (c) an anthraquinone of formula I and (d) an amino alcohol. The cured compositions are photosensitive and are suitable for the preparation of coatings and metallic images by electroless metal deposition.

Abstract: A photosensitive composition comprising:(a) a compound of the formula ##STR1## (b) an ethylenically unsaturated compound capable of free radical initiated addition polymerization;(c) a polymeric binder; and(d) a free radical generating system activatable by actinic radiation which comprises a hexaarylbiimidazole and a chain transfer agent.A single step process for forming a light-stable hologram using this photosensitive composition is also disclosed.

Abstract: Abstract of the disclosure: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, novel 4-quinazolone compounds as sensitizers of the formula (I) ##STR1##

Abstract: Photopolymerizable recording materials suitable for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable olefinically unsaturated organic compounds, optionally a polymeric binder, one or more photopolymerization initiators, a color-forming system which on irradiation with actinic light causes an increase in the color intensity of the recording material, a sensitizer and optionally further additive and/or auxiliary substances, and contain as the color-forming system(a) one or more colorless or virtually colorless organic compounds which are oxidizable to colored compounds, and(b) a photooxidant for the colorless or virtually colorless organic compound(s) (a),wherein photooxidant (b) comprises an organic salt with a substituted or unsubstituted hetaromatic system, this hetaromatic system having one or more built-in groups of the general formula (I) ##STR1## where R is substituted or unsubstituted alkenyl, alkynyl, hetaryl, alkoxycarbonyl, carbamoyl, alkyls

Abstract: A photographic imaging system is disclosed comprised of a hardenable organic component containing ethylenic unsaturation sites and coinitiators for ethylenic addition. The coinitiators include an activator and a photosensitizer. The photosensitizer is a 6-tertiary amino-2-(Z--CH.dbd.)benzofuran dye, where Z represents the atoms providing an electron withdrawing carbonyl or sulfonyl group and completing a conjugated methine linkage extending from the electron withdrawing carbonyl group through the benzofuran to the electron donating 6-tertiary amino substituent to form a resonant dye chromophore. The photosensitizers bathochromically extend exposure response of the imaging system.

Abstract: Disclosed is a photopolymerizable composition which is very sensitive to visible light. The composition comprises a polymerizable compound and a photopolymerization initiator wherein the photopolymerization initiator comprises (A) a particular xanthene, coumarin or merocianine dyestuff, (B) a diaryliodonium salt and (C) a compound having the formula;R(n)--D--CH.sub.

Abstract: A photographic imaging system is disclosed comprised of a hardenable organic component containing ethylenic unsaturation sites and an initiator system for ethylenic addition. The initiator system is comprised of an electron acceptor activator, an electron donor activator, and, acting as a photosensitizer, a dye capable of absorbing imaging radiation. The dye has a reduction potential related to that of the electron acceptor activator and an oxidation potential related to that of the electron donor activator to permit each to release a free radical upon excitation of the photosensitizer by exposure to actinic radiation.

Abstract: A photo polymerization initiator composition is disclosed. The composition is comprised of an in admixture with an acridine, initiator compound. The initiator composition is useful is preparing photopolymerizable compositions having increased effective photospeed.

Abstract: Photohardenable electrostatic master comprising an electrically conductive substrate, e.g., aluminized polyethylene terephthalate, bearing a layer of a photopolymer comprising an organic polymeric binder, compound having at least one ethylenically unsaturated group, photoinitiator, an aromatic amino compound, as defined, and an acid, e.g., p-toluene sulfonic acid, or an oxidized substituted aromatic amino compound. The photohardenable electrostatic master having improved charge decay and backtransfer is used for electrostatic proofing, etc.

Abstract: Relief plates and printing plates are produced by a positive-working process, using a photopolymerizable layer which contains one or more photopolymerizable, olefinically unsaturated compounds, one or more photoinitiators which can be activated by UV light, and a combination of a phenothiazinium, phenoxazinium, phenazinium or acridinium dye with a mild reducing agent which, on exposure to visible light, is capable of reducing the dye in the excited electronic state. The photopolymerizable layer is exposed imagewise to light having a wavelength longer than 450 nm, and simultaneously or subsequently exposed uniformly to light having a wavelength of from 300 to 420 nm, after which the unpolymerized areas of the layer are removed.

Abstract: A photopolymerizable composition comprises at least one polymerizable compound having at least one ethylenically unsaturated bond therein and at least one photopolymerization initiator and optionally at least one linear organic high molecular weight polymer and characterized in that the photopolymerization initiator comprises a specific combination of two kinds of compounds, for instance, 2,4,6-tris(trichloromethyl)-s-triazine and compound (12) represented by the following formula: ##STR1## The photopolymerizable composition exhibits a high sensitivity to extremely wide range of actinic rays extending from ultraviolet light to visible light and is useful for manufacturing PS plates and photoresist layer for use in making print circuit-boards or the like.

Abstract: A visible ray-recording hologram material comprising a polymer containing a carbazole ring, iodoform, and an aromatic colorant having a fused ring system. This material enables recording with rays having a wavelength of 450 to 550 nm.

Abstract: Upon imagewise exposure, a photopolymerizable composition which contains(a) a polymeric binder;(b) a compound that has at least one terminal ethylenic double bond and a boiling temperature, at standard pressure, of above 100.degree. C., and that can form a polymer by polymerization initiated by a free-radical process;(c) a photoinitiator;(d) a leuco base of a triarylmethane dye; and(e) a photochromic spiro-indolino-benzopyran compound represented by the formula ##STR1## wherein R denotes a hydrogen atom or a C.sub.1 -to-C.sub.16 alkyl group,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different, and each denotes a hydrogen or a halogen atom, a C.sub.1 -to-C.sub.4 alkyl or alkoxy group, or a nitro group, andR.sup.5, R.sup.6, R.sup.7 and R.sup.8 are identical or different, and each denotes a hydrogen or a halogen atom, a nitro or an amino group, a C.sub.1 -to-C.sub.5 alkyl or alkoxy group, or a C.sub.6 -to-C.sub.

Abstract: A light-sensitive material comprising a light-sensitive layer which contains silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the reducing agent is a hydrazine derivative having the following formula (I) or (II): ##STR1## in which R.sup.1 is a monovalent group selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group and a heterocyclic group, each of which may have one or more substituent groups; each of R.sup.2 and R.sup.3 independently is an aryl group which may have one or more substituent groups, or R.sup.2 and R.sup.3 form, together with the neighboring carbon, a condensed aromatic ring; R.sup.

Abstract: Disclosed is a photopolymerizable composition which is very sensitive to visible light. The composition comprises a polymerizable compound and a photopolymerization initiator wherein the photopolymerization initiator comprises (a) a particular xanthene or thioxanthene dyestuff, (b) a photosensitizer selected from the group consisting of N-phenylglycine, 2,4,6-tris(trichloromethyl)-1,3,5-triazine, and a mixture of p-dimethylaminobenzoic acid isopentyl ester and 2,4-diisopropylthioxanthone, and (c) a peroxide.

Abstract: An image-forming method which comprises:imagewise exposing a light-sensitive material comprising a light-sensitive layer provided on a support wherein the light-sensitive layer contains silver halide, a reducing agent, a polymerizable compound and a photo-polymerization initiator;simultaneously or thereafter developing the light-sensitive material to polymerize the polymerizable compound within the area where the latent image of the silver halide has been formed;pressing the light-sensitive material on an image-receiving material to transfer unpolymerized polymerizable compound to the image-receiving material; andirradiating the image-receiving material with a light.

Abstract: Spectral sensitizing dyes which sensitize photoinitiators and disperse in aqueous solutions are desirable in photosensitive systems where precise color rendition is important.

Abstract: There are disclosed negative-working resist compositions featuring a binder and a radiation-sensitive compound that loses HX upon exposure, to become less soluble in an aqueous base. X is selected from the group consisting of --CN, halide, and --SO.sub.2 R.sup.1 and R.sup.1 is alkyl of 1-5 carbon atoms or aryl of from 6 to 10 carbon ring atoms.

Abstract: The photosensitive composition of this invention contains (1) an ethylenically unsaturated component capable of forming a high polymer by addition polymerization or crosslinking, (2) a cyclic cisoid conjugated diene as a photooxidizable component capable of reacting with singlet oxygen to form an endoperoxide, and (3) a photooxygenation sensitizer. A process for preparing a photosensitive element, such as a relief printing plate, embodying a layer of such a composition is described.

Abstract: An image-recording process is disclosed, which comprises using a photopolymerizable element comprising a polymerizable vinyl monomer and/or a polymerizable prepolymer, a photopolymerization initiator and a dye capable of being bleached with said vinyl monomer and/or prepolymer or a dye precursor capable of producing the bleachable dye upon being heated, conducting imagewise exposure to polymerize the photopolymerizable element, and heating it to bleach the dye with non-polymerized monomer and/or non-polymerized prepolymer remaining in portions not exposed or exposed or to bleach dye produced from the dye precursor upon heating. A negative working image-recording material for this process is also disclosed.

Abstract: Disclosed is a photopolymerizable vehicle and method for the selective photopolymerization of said vehicle by the application of a plurality of different selected wavelengths of energy wherein any single wavelength of energy is inadequate for effecting said photopolymerization. The method comprises sequentially applying a plurality of different selected wavelengths of energy to said vehicle whereby polymerization is effected at the intersection of said wavelengths of energy.

Abstract: The photosensitive composition of this invention contains (1) an ethylenically unsaturated component capable of forming a high polymer by addition polymerization or crosslinking, (2) a cyclic cisoid conjugated diene as a photooxidizable component capable of reacting with singlet oxygen to form an endoperoxide, and (3) a photooxygenation sensitizer. A process for preparing a photosensitive element, such as a relief printing plate, embodying a layer of such a composition is described.

Abstract: Mono(meth)acrylate or di(meth)acrylate of 2-methylpropylene glycol. The diacrylate, or a low molecular weight oligomer thereof, with polymeric filler and sensitizer is useful as a photosensitive component.

Abstract: A high sensitivity photopolymerizable composition is disclosed. The composition includes a polymerizable compound having an ethylenically unsaturated bond and a photopolymerizable initiator represented by the general formula (I). ##STR1## The substituents within general formula (I) are defined within the specification. The composition has improved sensitivity and the initiator provides an increased polymerization rate. The composition may further include Michler's ketone and a N-methyl-2-benzoyl-.beta.-naphthothiazolin.

Abstract: Described are 1,3-diaza-9-thia-anthracene-2,4-diones of the general formula (II) ##STR1## wherein R.sup.1, R.sup.3 and R.sup.4 are identical or different and individually each denotes a hydrogen or halogen atom, an alkyl, alkoxy, carboxyl or alkoxy-carbonyl group,R.sup.2 denotes an alkoxy, carboxyl or alkoxy-carbonyl group, ortwo of the groups R.sup.1, R.sup.2, R.sup.3, and R.sup.4 together form a condensed aromatic radical.These compounds are used as photoinitiators in photopolymerizable recording materials and have an increased sensitivity in the spectral range between 425 and 480 nm.

Abstract: Photocurable compositions are provided which can be cured with ultraviolet light at a wave length greater than 300 nm. The photocurable compositions are based on the use of cationically polymerizable organic materials, for example, an epoxy resin and a photoinitiator in the form of a dialkylphenacyl sulfonium salt or hydroxyaryldialkyl sulfonium salt which have been sensitized with a particular dye sensitizer.

Abstract: In a photopolymerizable composition comprising, as essential components, (A) a compound having at least one ethylenically unsaturated double bond capable of undergoing addition polymerization and (B) a photopolymerization initiator, the improvement which comprises that the photopolymerization initiator comprising a combination of (a) a 5-[(arenooxazol-2-ylidene)ethylidene]-2-thiohydantoin compound represented by the general formula (I) (a 5-[(substituted benzoxazol-2'-ylidene)ethylidene]-2-thiohydantoin compound) or (II) (a 5-[substituted naphthol(1,2-D)oxazol-2-ylidene)ethylidene]-2-thiohydantoin compound) and (b) a 2,4,6-substituted-1,3,5-triazine compound represented by the formula (III): ##STR1## wherein X represents a hydrogen atom, an alkyl group, a substituted alkyl group, an alkoxy group, an aryl group, a substituted aryl group, an aryloxy group, an aralkyl group or a halogen atom; R.sup.1, R.sup.2 and R.sup.

Abstract: A photo-initiator system of a polyester resin is disclosed which consists of an oxime carbonate of a vicinal diketone (I), a photo-reducible dye (II) and an amine (III). This system is capable of polymerizing and curing unsaturated polyester resins by irradiation with visible light to provide coatings, adhesives, castings and fibre reinforced composites.The formulae of the ingredients of the system are ##STR1## where R' and R" are independently alkyl, aryl or aralkyl (R' preferably being CH.sub.3 and R" C.sub.2 H.sub.5) ##STR2## wherein X=Br or I on at least 2 positionsY=H, Br, IZ=H, COOM, COOR wherein R=C.sub.1 -C.sub.5 alyl.M=H, K, Na, Li, NH.sub.4(there preferably being 4X substituents which are Br, and Z preferably being --COOM or --COOR), and wherein also 4Y substituents may be present and preferably be I) and (III) ##STR3## wherein R.sub.1 is H, alkyl, hydroxy-substituted alkyl, aryl or aralkyl. R.sub.2 is independently alkyl, hydroxyl substituted alkyl, aryl or aralkyl.

Abstract: Photoimaging compositions comprising (A) 2,4,5-triphenylimidazolyl dimer having selected substituents on the 2,4 and 5 phenyl rings and an extinction coefficient determined in methylene chloride at 10.sup.-5 to 10.sup.-3 mol/liter at 350 nm of at least 4000 liters/mol-cm and at 400 nm of at least 250 liters/mol-cm; and at least one of (B1) leuco dye or (B2) addition polymerizable ethylenically unsaturated monomeric compound. The new imaging compositions are useful in preparing dual response photoimaging products such as proofing papers, printout paper, overlay films and photopolymerizable elements. Improved imaging speed is achieved at equal concentration levels when compared with conventional 2,4,5-triphenylimidazolyl dimers.

Abstract: There are disclosed light-sensitive compounds and a composition comprising (a) such compounds and (b) a compound having at least one reactive site capable of stepwise photo-reaction with the light-sensitive compounds. The light-sensitive compounds have the structural formula, ##STR1## wherein Z.sup.1 and Z.sup.2 are each independently the number of non-metallic atoms necessary to complete 1, 2, 3, or 4 unsaturated carbocyclic or heterocyclic rings of from 6 to 18 nuclear atoms;Z.sup.3 is either a carbon-to-carbon bond or vinylene;and X is a linking group.The composition can be applied to a variety of supports and photoreacted by exposure to activating radiation.

Abstract: A co-initiator for use in an improved photopolymerization composition, element and method is disclosed. The photopolymerizaton composition comprises an addition-polymerizable compound containing ethylenic unsaturation and the co-initiator which includes a photopolymerization activator and an amine-substituted ketocoumarin sensitizer having an absorption maximum between about 350 and about 550 nm; said activator having the structure ##STR1## wherein Q.sup.1 and Q.sup.2 are each independently hydrogen; alkyl, thioalkyl or alkoxy containing from 1 to about 5 carbon atoms; aryl or aryloxy or benzoyloxy containing from about 6 to 10 carbon atoms; hydroxy; or halogen; or together Q.sup.1 or Q.sup.2 are the necessary atoms to complete a fused heterocyclic or aromatic ring containing from about 4 to 6 ring atoms; and Q.sup.3 is hydrogen or alkyl containing from 1 to about 5 carbon atoms.

Abstract: The present invention relates to a photoimaging process whereby a polymeric film containing sulfide functionality is selectively exposed to incident radiation in the presence of oxygen and a photosensitizer so that the sulfur functionality is photooxidized to produce a latent image which may then be developed. Polymeric films containing photooxidizable organic sulfide functionality and preferably additional carbon-carbon double bond unsaturation, which are capable of being used in the foregoing process are also included within the scope of the present invention.

Abstract: Additions of fluorescein or a fluorescein salt and a diol to a photosensitized polymeric material increase the photosensitivity thereof in a method for photodepositing a luminescent-screen structure for a cathode-ray tube.

Abstract: Photoimaging compositions comprising (A) 2,4,5-triphenylimidazolyl dimer having selected substituents on the 2,4 and 5 phenyl rings and an extinction coefficient determined in methylene chloride at 10.sup.-5 to 10.sup.-3 mol/liter at 350 nm of at least 4000 liters/mol-cm and at 400 nm of at least 250 liters/mol-cm; and at least one of (B1) leuco dye or (B2) addition polymerizable ethylenically unsaturated monomeric compound. The new imaging compositions are useful in preparing dual response photoimaging products such as proofing papers, printout paper, overlay films and photopolymerizable elements. Improved imaging speed is achieved at equal concentration levels when compared with conventional 2,4,5-triphenylimidazolyl dimers.