Abstract: [Problem] To provide a dental photocurable composition having sufficient mechanical property and being excellent in color tone selectivity because of having a small color difference between before curing and after curing. [Solution] To provide a dental photocurable composition, comprising (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator, (D) photopolymerization accelerator and (E) filler, wherein, the dental photocurable composition comprises (B-1) ?-diketone compound as the (B) photosensitizer, and the dental photocurable composition comprises, with respect to 100 parts by mass of the (A) polymerizable monomer, 0.15 parts by mass or less of the (B-1) ?-diketone compound, 0.5 parts by mass or more of the (C) photoacid generator, and 100 parts by mass or more of the (E) filler.

Abstract: A nail gel removal method includes the steps of (a) absorbing warm water, which is water having a temperature higher than the room temperature, with the nail gel coated on the nail a user by soaking one or more nails in the warm water for three minutes or more; (b) softening the nail gel on the nail of the user until it is removable from the nail of the user; and (c) removing the softened nail gel from the nail of the user.

Abstract: To provide a photopolymerizable composition, which includes photopolymerizable monomers containing glycerol dimethacrylate, caprolactone-modified dipentaerythritol hexaacrylate, and diethylene glycol dimethacrylate, wherein an amount of the glycerol dimethacrylate in the photopolymerizable monomers is 25% by mass or greater.

Abstract: The present disclosure provides a photocurable ink comprising a radiation curable material selected from the group consisting of a curable monomer, a curable oligomer, and mixtures thereof; a photoinitiator; and a surfactant, which is suitable for use in an indirect printing method. The present disclosure also provides a method of printing using a photocurable ink.

Abstract: An active energy ray-curable adhesive composition comprising radically polymerizable compounds (A), (B) and (C) as curable components, wherein the radically polymerizable compound (A) has an SP value of 29.0 (kJ/m3)1/2 to 32.0 (kJ/m3)1/2; the radically polymerizable compound (B) has an SP value of 18.0 (kJ/m3)1/2 to less than 21.0 (kJ/m3)1/2; the radically polymerizable compound (C) has an SP value of 21.0 (kJ/m3)1/2 to 23.0 (kJ/m3)1/2, and the composition comprises 1.0 to 30.0% by weight of the radically polymerizable compound (A), 35.0 to 98.0% by weight of the radically polymerizable compound (B), and 1.0 to 30.0% by weight of the radically polymerizable compound (C) based on 100% by weight of the total amount of the composition.

Abstract: The present disclosure provides a method of providing an adhesive composition comprising the steps of combining crosslinkable composition including: a) a (meth)acryloyl monomer mixture with the b) photocrosslinking agent mixture, and irradiating with UVC radiation to polymerize and crosslink the composition.

Abstract: The present invention provides a method comprising: applying a UV-curable ink to a substrate; partially curing the ink by exposing the ink to UV radiation from an LED source; and exposing the partially cured ink to UV radiation from a flash lamp. The flash lamp is a xenon or krypton flash lamp. An apparatus for performing the method and an ink adapted for use in the method are also provided.

Abstract: An inkjet printing radiation curable inkjet ink for forming a protective layer during an etching process includes at least 70 percent by weight of a polymerizable composition based on the total weight of radiation curable inkjet ink, wherein the polymerizable composition has an oxygen fraction OFR>0.250 and a weighted polymerizable functionality WPF?0.0050, and the polymerizable composition contains no polymerizable compound with an ethylenic double bond and including a phosphoester group or a carboxylic acid group in the molecule thereof.

Abstract: The present invention provides an energy ray-curable ink composition excellent in the continuous discharge property, and excellent in curability and adherability. The present invention relates to an energy ray-curable ink composition which contains a coloring agent, contains only a monofunctional monomer having an acrylic equivalent of 300 or less, and having one ethylenic double bond in one molecule, and a polyfunctional monomer having an acrylic equivalent of 150 or less, and having two or more ethylenic double bonds in one molecule as a polymerizable compound, contains an ?-aminoalkylphenone compound and a thioxanthone compound as a photopolymerization initiator, and contains a silicone compound having a polydimethylsiloxane structure as a surface conditioner.

Abstract: A photo-curable ink composition including an acrylic polymer or copolymer, a vinyl ester component, a multifunctional monomer, a photoinitiator and a pigment. Also disclosed herein is a method for forming a printed article and an ink-jet ink printing system using said photo-curable ink composition.

Abstract: The present invention provides a dual-curable adhesive composition, comprising: component (a): an epoxy resin; at least one selected from component (b) and component (c), wherein component (b) is a (meth)acrylate monomer, and component (c) is an oligomer containing a (meth)acryloxy group; component (d): a thermal polymerization catalyst which catalyzes the thermal polymerization reaction of component (a); and component (e): a photo polymerization initiator which initiates the photo polymerization reaction of component (a) and at least one selected from component (b) and component (c), wherein component (e) is a mixture of a cationic photo polymerization initiator and a radical photo polymerization initiator. The dual-curable adhesive composition of the present invention is used for bonding or laminating a transparent substrate with another transparent substrate, or bonding or laminating a transparent substrate with a non-transparent substrate.

Abstract: The UV curable ink jet recording ink composition contains a thioxanthone-based photopolymerization initiator and a hindered amine compound. The dissolved oxygen content in the ink composition is 20 ppm or less.

Abstract: An ink composition includes (component A) a polymer that has a group containing a silsesquioxane structure and has a weight average molecular weight of 3,000 or more, (component B) a monofunctional polymerizable compound, and (component C) a polymerization initiator; or an ink composition includes (component A?) a compound that does not have an ethylenically unsaturated double bond but has a silsesquioxane structure, and has a molecular weight of 300 or more but less than 3,000, (component B?) a monofunctional polymerizable compound, (component C) a polymerization initiator, and (component D) a coloring agent, wherein a content of the (component B?) monofunctional polymerizable compound with respect to the total content of all the polymerizable compounds is 80% by mass or more.

Abstract: The present disclosure provides a method of providing an adhesive composition comprising the steps of combining crosslinkable composition including: a) a (meth)acryloyl monomer mixture with the b) photocrosslinking agent mixture, and irradiating with UVC radiation to polymerize and crosslink the composition.

Abstract: The present invention relates to a radiation curable composition comprising at least one ethylenically unsaturated compound (A) and at least one inert OH-terminated polyester (B) prepared from a polyol component that comprises ethylene glycol and from a polycarboxy component that comprises phthalic acid and/or phthalic anhydride. These polyesters can be further modified to bear moieties comprising photo-initiating activity. The present invention further relates to their preparation and their use in for instance lithographic and flexographic applications.

Abstract: An adhesive composition curable with an active energy ray includes radical polymerizable compounds (A), (B) and (C) as curable components. The composition includes the radical polymerizable compound (A) having an SP value of 29.0 to 32.0 (kJ/m3)1/2 both inclusive in a proportion of 20 to 60% by weight, the radical polymerizable compound (B) having an SP value of 18.0 (kJ/m3)1/2 or more, and less than 21.0 (kJ/m3)1/2 in a proportion of 10 to 30% by weight, and the radical polymerizable compound (C) having an SP value of 21.0 to 23.0 (kJ/m3)1/2 both inclusive in a proportion of 20 to 60% by weight, when the total amount of the adhesive composition is regarded as 100% by weight, and a homopolymer made from each of the radical polymerizable compounds (A), (B) and (C) has a glass transition temperature (Tg) of 60° C. or higher.

Abstract: Disclosed is an actinic radiation-curing type ink set comprising a colored ink composition and a clear ink composition (C1), the colored ink composition comprising (Component A1) a radically polymerizable compound, (Component B1) a polymerization initiator, and (Component D) a colorant, and the clear ink composition (C1) comprising (Component A2) a radically polymerizable compound, (Component B2) a polymerization initiator, and (Component S) an organic solvent.

Abstract: Gloss-controllable, radiation-curable inkjet inks cure quickly with minimal radiation exposure, enabling high-printing speed and low surface heating with controllable gloss on the printed image. Ink gloss can be controlled by varying the pinning energy to create the printed images with varied gloss from 10 to 100 gloss unit at 85° gloss measurement angle. After curing, the ink remains flexible on the surface, giving excellent performance on a wide range of surfaces, greatly expanding the range of applications for the ink. A gloss-controllable, radiation-curable inkjet ink may include approximately 8-18% of photo-initiators responding to UVA and UW (UVA: 320-400 nm wavelengths, UW: 400-450 nm wavelengths) radiation to initiate free radicals and optionally, other types of photo-initiators and approximately 60-85% of highly flexible mono-functional monomers.

Abstract: The invention relates to a coating formulation for preparing a hydrophilic coating, wherein the hydrophilic coating formulation comprises a supporting monomer and/or polymer comprising at least 2 reactive moieties capable of undergoing polymerization reactions, a polyelectrolyte, a Norrish Type I photoinitiator, and a Norrish Type II photoinitiator.

Abstract: A light-curable dental material is provided, comprising a polymerizable compound having at least one ethylenically unsaturated bond, a photopolymerization initiator for polymerizing said polymerizable compound, and a 1,3-dipolar compound as a polymerization inhibitor.

Abstract: The present invention provides an aqueous ink composition including at least a sensitizing dye represented by the following Formula (i), an ethylenically unsaturated bond-containing water-soluble polymerizable compound, a polymerization initiator and water: wherein, in Formula (i), X represents O, S or NR; n represents an integer of 0 or 1; R represents a hydrogen atom, an alkyl group or an acyl group; each of R1, R2, R3, R4, R5, R6, R7 and R8 independently represents a hydrogen atom or a monovalent substituent, provided that any neighboring two of R1, R2, R3 and R4 may be bonded to each other to form a ring, and R5 and R7 or R8, or R6 and R7 or R8, may be bonded to each other to form an aliphatic ring but do not form an aromatic ring.

Abstract: A photosensitive resin composition which is effective in avoiding troubles in the step of plating with various metals in printed wiring board production, such as under-film metal deposition and film peeling, and which forms a wiring-protecting film excellent in adhesion, flexibility, insulation reliability, and heat resistance. The photosensitive resin composition comprises (A) a carboxylated polymer, (B) a compound having at least two photopolymerizable unsaturated double bonds, (C) a photopolymerization initiator, and (D) a nitrogen compound represented by a specific feature.

Abstract: [Purpose] To provide a photosensitive resin composition having satisfactory compatibility during dry film formation, exhibiting similar sensitivity for exposure with both i-line radiation and h-line radiation type exposure devices, having excellent resolution and adhesiveness, allowing development with aqueous alkali solutions, and preferably, having no generation of aggregates during development. [Solution Means] A photosensitive resin composition comprising (a) 20-90 wt % of a thermoplastic copolymer having a specific copolymerizing component copolymerized, and having a carboxyl group content of 100-600 acid equivalents and a weight-average molecular weight of 5,000-500,000, (b) 5-75 wt % of an addition polymerizable monomer having at least one terminal ethylenic unsaturated group, (c) 0.01-30 wt % of a photopolymerization initiator containing a triarylimidazolyl dimer, and (d) 0.001-10 wt % of a pyrazoline compound.

Abstract: A radiation curable composition comprising a curable compound, a photo-initiator and a co-initiator characterized in that said co-initiator is represented by Formula I, wherein MA is the residue of a mono- or oligofunctional Michael acceptor; L is a divalent linking group positioning the two tertiary amines in a 1-3 to 1-10 position, with the proviso that both amines are aliphatic; R1, R2 and R3 independently represent an optionally substituted alkyl group, an optionally substituted alkenyl group , an optionally substituted alkynyl group or an optionally substituted (hetero) alkaryl group; any two of R1, R2 and R3 may represent the necessary atoms to form a ring; any two of R1, R2 and R3 may represent the necessary atoms to form a ring with any of the atoms of the linking group L; n is an integer ranging from 1 to 6.

Abstract: The photocuring efficiency of an N-oxyazinium salt photoinitiator is increased by mixing it with an organic phosphine as a photoinitiator efficiency amplifier. This mixture or photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment.

Abstract: Photocuring methods are made more efficient by using an N-oxyazinium salt photoinitiator with an organic phosphine as a photoinitiator efficiency amplifier. This photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment. The method can be used to prepare various articles, fibers, or devices with photocured compositions.

Abstract: A radiation curable composition for UV LED curing includes at least one co-initiator selected from the group consisting of an aliphatic tertiary amine and a dialkyl aniline derivative; and at least one specific carbazole photoinitiator. The radiation curable composition can be advantageously used to prevent unstable yellowing behaviour in an image upon storage.

Abstract: A radiation curable ink composition has improved adhesion towards rigid recording media, good jetting behaviour and no or minimal health and safety risks. The radiation curable ink has a viscosity of 30 mPa·s, or less, at 50° C.

Abstract: An ink composition for ink jet providing excellent in the curability based on ultraviolet irradiation in the presence of water or a solvent, the ejection stability with respect to the factors such as dot loss or flight deflection, and the storage stability of ink. Also provided herein is an ink composition for ink jet including: a pigment; a water-soluble organic solvent; a surfactant; at least either of a urethane (meth)acrylate being represented by the following general formula (1) and having a weight average molecular weight of 1,000 to 10,000 and a cross-linked urethane (meth)acrylate having a constitutional unit including the urethane (meth)acrylate; a compound having a radical polymerizable group(s); a photoradical polymerization initiator; and water: A1-O—(CONH—B1—NHCOO—C1—O)n—CONH—B1—NH—COO-D1??(1) where each of A1, B1, C1, D1, and n in formula (1) are described herein.

Abstract: The photocuring efficiency of a photoinitiator is increased by mixing it with an organic phosphite and an aldehyde. This mixture or photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment.

Abstract: A photocurable ink contains a colorant dissolved or dispersed within a solvent, a photoinitiator, an organic phosphite, an aldehyde, and a photocurable compound. The organic phosphite is present in a molar excess relative to the aldehyde moieties that are present. The photocurable ink can be used for imaging or other applications where a uniform or patterned image is desired. The photocurable ink can be cured partially before application, or totally cured after application.

Abstract: The photocuring efficiency of a photoinitiator is increased by mixing it with an organic phosphite and an aldehyde. This mixture or photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment.

Abstract: A radiation curable inkjet fluid includes a radiation curable composition including at least 25 wt % of a vinylether acrylate and at least 15 wt % of a polymerizable compound including at least three acrylate groups, each wt % being based upon the total weight of the radiation curable composition; and a photoinitiator including a tertiary amine group and 0 to 3 wt % of isopropylthioxanthone based upon the total weight of the radiation curable inkjet fluid. Also, an inkjet printing method using the radiation curable inkjet fluid.

Abstract: The object of the present invention is to provide an active energy ray-curable ink-jet printing ink, including: a coloring agent; a compound having an ethylenic double bond; and a photo-polymerization initiator, wherein the photo-polymerization initiator includes a compound represented by general formula (1): (wherein A represents any one of —O—, —CH2—, —CH(CH3)—, and —C(CH3)2—; and each of R1 and R2 independently represents a hydrogen atom, a methyl group, or a trimethylsilyl group), and an ?-aminoketone-based compound and/or an acyl phosphine oxide-based compound, and 40% by mass or more of the compound represented by general formula (1) is included with respect to the total photo-polymerization initiator.

Abstract: The present invention provides a method comprising: applying a UV-curable ink to a substrate; partially curing the ink by exposing the ink to UV radiation from an LED source; and exposing the partially cured ink to UV radiation from a flash lamp. The flash lamp is a xenon or krypton flash lamp. An apparatus for performing the method and an ink adapted for use in the method are also provided.

Abstract: A light-curable dental material is provided, comprising a polymerizable compound having at least one ethylenically unsaturated bond, a photopolymerization initiator for polymerizing said polymerizable compound, and a 1,3-dipolar compound as a polymerization inhibitor.

Abstract: A photocurable ink composition includes a dendritic polymer, a monomer expressed by CH2?CR1—COO—R2—O—CH?CH—R3 (R1 denotes a hydrogen atom or a methyl group, R2 denotes an organic residue having a carbon number of 2 to 20, and R3 denotes a hydrogen atom or an organic residue having a carbon number of 1 to 11), and a photo-polymerization initiator.

Abstract: A photocurable ink composition set includes ink composition A and ink composition B. Ink composition A contains a dendritic polymer and an monomer expressed by general formula (1): CH2?CR1—COO—R2—O—CH?CH—R3. Ink composition B contains a coloring agent and a monomer expressed by general formula (1). In the formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents an organic moiety having a carbon number in the range of 2 to 20, and R3 represents a hydrogen atom or an organic moiety having a carbon number in the range of 1 to 11.

Abstract: A polymerizable composition includes at least one monomer, a photoinitiator capable of initiating polymerization of the monomer when exposed to light, and a phosphor capable of producing light when exposed to radiation (typically X-rays). The material is particularly suitable for bonding components at ambient temperature in situations where the bond joint is not accessible to an external light source. An associated method includes: placing a polymerizable adhesive composition, including a photoinitiator and energy converting material, such as a down-converting phosphor, in contact with at least two components to be bonded to form an assembly; and, irradiating the assembly with radiation at a first wavelength, capable of conversion (down-conversion by the phosphor) to a second wavelength capable of activating the photoinitiator, to prepare items such as inkjet cartridges, wafer-to-wafer assemblies, semiconductors, integrated circuits, and the like.

Abstract: An ink set for inkjet recording is provided that includes at least a colored liquid comprising at least a radically polymerizable compound, a photopolymerization initiator, and a colorant and an undercoat liquid comprising at least a radically polymerizable compound and a photopolymerization initiator, the undercoat liquid comprising a sensitizer represented by Formula (I) below. In Formula (I) above, X denotes O, S, or NR, n denotes 0 or 1, R denotes a hydrogen atom, an alkyl group, or an acyl group, and R1, R2, R3, R4, R5, R6, R7, and R8 independently denote a hydrogen atom or a monovalent substituent. There is also provided an inkjet recording method employing the ink set for inkjet recording, the method including a step of applying the undercoat liquid on top of a recording medium, a step of semi-curing the undercoat liquid, and a step of carrying out image formation by discharging the colored liquid on top of the semi-cured undercoat liquid.

Abstract: The invention provides an ink composition including (i) a sensitizing dye having a polymerizable group as a substituent, (ii) a polymerization initiator and (iii) a polymerizable compound having an ethylenically unsaturated bond. The invention also provides an inkjet recording method and a polymerizable compound useful as a sensitizing dye. The sensitizing dye (i) is represented by Formula (I) or (II) below. In the formulae, X represents O, S, NRa, or NRb, n1 and n2 each represent 0 or 1, Ra, Rb, and R1 to R18 each represent a hydrogen atom or a monovalent substituent, and one polymerizable group is present in the molecule.

Abstract: An object of the present invention is to provide an energy ray-curable ink composition which is excellent in curability and adhesion, and is also excellent in storage stability. The present invention relates to an energy ray-curable ink composition comprising a coloring material; a polyfunctional monomer having three or more ethylenical double bonds in one molecule as a polymerizable compound; an ?-aminoalkylphenone-based compound and a thioxanthone-based compound as photopolymerization initiators; and a hindered amine-based compound having a 2,2,6,6-tetramethylpiperidinyl group as an antigelling agent.

Abstract: A pressure-sensitive adhesive composition capable of giving a pressure-sensitive adhesive sheet which simultaneously realizes satisfactory holding power, adhesion, and peel resistance in peeling from curved surfaces, while balancing these properties, and has satisfactory heat resistance. The composition comprises the following ingredients: (A) a maleimide crosslinking agent having two or more maleimide groups per molecule; (B) a monomer which, when caused to homopolymerize, gives a homopolymer having a glass transition temperature of ?40° C. or lower; (C) a carboxylated monomer copolymerizable with the monomer of the ingredient (B); and (D) a photopolymerization initiator, the maleimide crosslinking agent of the ingredient (A) being contained in an amount of 0.01-2 parts by weight per 100 parts by weight of the sum of the monomers of the ingredients (B) and (C).

Abstract: The present invention relates to radiation-curable coating materials comprising new photoinitiators, and to the use thereof.

Abstract: Compounds of formula (I) [in which: A and B are terminal groups; R1 represents a group of formula (II) or (III); R2 is alkyl or aryl; Z is a group —(CHR3)n, where R3 is hydrogen, hydroxy or alkyl, and n is a number from 0 to 6; Y is carbonyl or a group —CH2—; Q represents a residue of a dihydroxy compound; and x is a number from 1 to 100] are useful sensitisers for use with Type II photoinitiators in the formulation of printing inks and other energy curable coatings.

Abstract: The invention relates to light-curable dental materials comprising at least one polymerizable compound, a photopolymerization initiator and a polymerization inhibitor.

Abstract: Compounds of the formula I or (I?), wherein R1 and R?1 for example are hydrogen, C3-C8cycloalkyl or C1-C12alkyl, R2 and R2? for example are hydrogen; unsubstituted C1-C20alkyl or substituted C1-C20alkyl; and R8 and R9 for example are hydrogen, C1-C12alkyl which optionally is substituted, or phenyl which optionally is substituted; exhibit an unexpectedly good performance in photopolymerization reactions.

Abstract: An energy beam curable type ink jet printing ink comprising (A) a colorant, (B) a compound having at least one ethylenically unsaturated bond which can be polymerized by the application of an energy beam and (C) a photopolymerization initiator, wherein the component (B) is a compound having at least one methacryloyl group as a sole polymerizable unsaturated group and the component (C) is a 2-alkyl-2-amino-2-benzyl-1-(4-morpholinophenyl)ethan-1-one. This ink has low viscosity, high sensitivity and sufficiently high film strength after curing.

Abstract: The present invention relates to a photosensitive resin composition including a) an alkali-soluble acrylate resin, b) a cross-linking monomer having at least two ethylenic double bonds, and c) a phosphinoxide based photopolymerization initiator and an acridon based photopolymerization initiator; a preparation method thereof; and a dry film resist comprising the same.

Abstract: Disclosed is a radiation curable ink containing a fluorescent material that upon exposure to activating energy fluoresces such that an image that was not visible prior to exposure to the activating energy becomes visible. Also disclosed are an ink jet system and a process printing the disclosed radiation curable ink.