Abstract: The present invention relates to compositions (self-thermally) curable on demand under the triggering action of UV-visible to near-infrared irradiation of moderate intensity, method of using same for accelerated photopolyaddition of cyclic ether-amine resins or ultrafast dark curing of cyclic ether-amine resins, and articles obtained by such method. The invention also relates to a resin casting, film or coated substrate, and an adhesive layeror bonding agent, comprising acyclic ether-amine resin obtained by an accelerated curing process according to the invention. The invention additionally relates to the use of a composition of the invention for increasing the delamination strength of laminated composite materials.

Abstract: Embodiments in accordance with the present invention encompass a composition containing a latent catalyst and a compound capable of generating a Bronsted acid with a counterion capable of coordinating and activating the latent catalyst along with one or more monomers which undergo ring open metathesis polymerization (ROMP) and one or more multi-functional crosslinkable molecules when said composition is exposed to a suitable radiation forms a three-dimensional (3D) object. The catalyst system employed therein can be sensitive to oxygen and thus inhibits polymerization in ambient atmospheric conditions. The three-dimensional objects made by this process exhibits improved mechanical properties, particularly, high distortion temperature, impact strength, elongation to break, among others. Accordingly, compositions of this invention are useful as 3D inkjet materials for forming high impact strength objects of various sizes with microscale features lower than 100 microns, among various other uses.

Abstract: The disclosure relates to an organic-inorganic hybrid (OIH) polymeric composition and related methods for forming the same. The disclosure also relates to a polymeric composition as disclosed herein and related methods for forming the same. The OIH polymeric composition and the polymeric composition can be formed by UV-irradiating a corresponding composition including a Michael-addition (MA) acceptor compound, a Michael-addition (MA) donor compound, a silane compound, when present, and a photo-latent base initiator to form a corresponding base catalyst and catalyze the reactions forming the networked polymer. The OIH polymeric composition and the polymeric composition can be used as a coating on any of a variety of substrates or as an interlayer in an additive manufacturing process.

Abstract: Embodiments in accordance with the present invention encompass compositions encompassing a latent organo-ruthenium compound, a pyridine compound, a photosensitizer and an ultra violet light blocking compound along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is exposed to suitable actinic radiation to form a substantially transparent film or a three dimensional object. Surprisingly, the compositions are very stable at ambient conditions to temperatures up to 80° C. for several days and undergo mass polymerization only when subjected to actinic radiation under inert atmosphere such as for example a blanket of nitrogen. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as 3D printing materials, coatings, encapsulants, fillers, leveling agents, among others.

Abstract: The present application provides a semi-permeable hydrogel composition comprising an alginate matrix that is covalently crosslinked in its periphery to a multi-armed water soluble polymer, along with related methods and uses thereof.

Abstract: The present invention concerns type II photoinitiators for the free-radical crosslinking of silicone compositions, in particular acrylic silicone compositions. The present invention concerns a silicone composition C1 that can be crosslinked by exposure to radiation with a wavelength of between 300 and 450 nm, comprising: —at least one organopolysiloxane A comprising at least one methacrylate group bonded to a silicon atom, at least one organohydrogenopolysiloxane H comprising at least two, and preferably at least three hydrogen atoms each bonded to different silicon atoms, and—at least one free-radical photoinitiator P. The present invention also concerns the provision of a silicone composition that can be polymerized or crosslinked by free-radical process comprising a type II photoinitiator system suitable for crosslinking silicone compositions, in particular by exposure to radiation, and absorbing light radiation with a wavelength greater than 300 nm.

Abstract: The disclosure relates to an organic-inorganic hybrid (OIH) polymeric composition and related methods for forming the same. The disclosure also relates to a polymeric composition as disclosed herein and related methods for forming the same. The OIH polymeric composition and the polymeric composition can be formed by UV-irradiating a corresponding composition including a Michael-addition (MA) acceptor compound, a Michael-addition (MA) donor compound, a silane compound, when present, and a photo-latent base initiator to form a corresponding base catalyst and catalyze the reactions forming the networked polymer. The OIH polymeric composition and the polymeric composition can be used as a coating on any of a variety of substrates or as an interlayer in an additive manufacturing process.

Abstract: Voltammetric sensors prepared from composite materials and optionally using microfabrication techniques enable detection of analyte in sample volumes under ten microliters.

Abstract: Photocurable (meth)acrylate compositions with low viscosity when uncured, and high flexibility and shear/tensile strength when cured, further possessing rapid tack-free fixture times, comprising mixtures of urethane acrylate resin, isobornyl acrylate, N,N-dimethylacrylamide, a photoinitiator component, and a low percentage of tetrahydrofurfuryl acrylate, for example from about 9% to about 15% by weight based on the weight of the composition. Applications can include adhesive bonding of medical tubing, UV/Visible transparent plastics material medical devices or equipment, or other flexible UV/Visible transparent material substrates.

Abstract: Embodiments in accordance with the present invention encompass compositions encompassing a latent organo-ruthenium compound, a pyridine compound, a photosensitizer and an ultra violet light blocking compound along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is exposed to suitable actinic radiation to form a substantially transparent film or a three dimensional object. Surprisingly, the compositions are very stable at ambient conditions to temperatures up to 80° C. for several days and undergo mass polymerization only when subjected to actinic radiation under inert atmosphere such as for example a blanket of nitrogen. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as 3D printing materials, coatings, encapsulants, fillers, leveling agents, among others.

Abstract: A UV-curable ink jet ink composition includes: 10.00% by mass or more and 60.00% by mass or less, relative to a total mass of the ink composition, of a compound represented by formula (A); 10.00% by mass or more and 50.00% by mass or less, relative to the total mass of the ink composition, of one or more monofunctional monomers having an alicyclic hydrocarbon group or a cyclic ether group; 0.05% by mass or more and 0.50% by mass or less, relative to the total mass of the ink composition, of one or more fluorescent brighteners including a compound represented by formula (b1), (b2), (b3), or (b4); and 3.00% by mass or more and 8.00% by mass or less, relative to the total mass of the ink composition, of one or more acylphosphine oxide polymerization initiators.

Abstract: A photocurable inkjet printing ink composition contains a photopolymerizable compound and a photopolymerization initiator, wherein in 100 percent by mass of the photocurable inkjet printing ink composition, included are: an acrylamide-based monomer by 5.0 to 50 percent by mass; a monofunctional monomer other than acrylamide-based monomer by 15 to 70 percent by mass; a polymerizable compound having two or more functionalities by 5.0 to 30.0 percent by mass; vinyl caprolactam by 0.1 to 15 percent by mass and/or an acrylated amine compound having two photopolymerizable functional groups and two amino groups in the molecule by 0 to 10 percent by mass; and the percentage of monofunctional monomers in the photopolymerizable compound is 60 to 99.5 percent by mass.

Abstract: An active-energy-ray-curable composition including: a magenta pigment; a polymerizable compound; and a pigment adsorption component, an amount of the pigment adsorption component (A0) adsorbed onto 100 mg of the magenta pigment being from 10 mg through 60 mg.

Abstract: A photoinitiator of Formula I includes a benzophenone moiety, a nitrogen-containing moiety (NCM) covalently bonded to the benzophenone moiety, and an unsaturated polymerizable moiety (PM) covalently bonded to the nitrogen-containing moiety. The unsaturated polymerizable moiety includes an acrylate group or a methacrylate group.

Abstract: A photoinitiator includes a benzophenone moiety, a nitrogen-containing moiety covalently bonded to the benzophenone moiety, and an unsaturated polymerizable moiety covalently bonded to the nitrogen-containing moiety. The unsaturated polymerizable moiety includes an acrylate group or a methacrylate group.

Abstract: According to the present invention, a curable composition can be provided, said composition being characterized by comprising: (A) an episulfide compound; and (B) a photobase generator comprising an organoboron compound represented by general formula (1) below: (In general formula (1), R1, R2, R3, R4 and R5 may be the same as or different from one another and independently represent an alkyl group having 1 to 8 carbon atoms; and Ar1, Ar2 and Ar3 may be the same as or different from one another and independently represent a group selected from the group consisting of a phenyl group, a naphthyl group, an anthracenyl group and a phenanthryl group, each of which may have a substituent selected from the group consisting of an alkyl group, an aryl group, an alkenyl group, a cycloalkyl group and a heterocyclic group.

Abstract: The present invention provides a photocurable ink composition for ink jet recording with excellent curability. The photocurable ink composition for ink jet recording includes polymerizable compounds, a photopolymerization initiator, and a colorant, wherein the polymerizable compounds include a vinyl ether group-containing (meth)acrylate represented by general formula (I): CH2?CR1—COOR2—O—CH?CH—R3??(I) (wherein R1 is a hydrogen atom or a methyl group, R2 is a divalent organic residue having 2 to 20 carbon atoms, and R3 is a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms) and phenoxyethyl (meth)acrylate.

Abstract: UV-curable ink formulations are provided that are capable of being cured under low-energy conditions, such as with a conventional mercury vapor lamp operating at half or less of the lamp's nominal wattage or using an LED lamp. Methods for forming a printed ink image on a substrate using the ink are also provided, which permit maintenance of relatively high line speeds while consuming less energy due to the use of lower-wattage lamp settings.

Abstract: Compositions useful in aerospace sealant applications comprise sulfur-containing polymers such as polythioethers and polysulfides and are cured using Michael addition reactions. Compositions employing Michael addition curing chemistries include sulfur-containing adducts comprising terminal Michael acceptor groups. In particular, the sulfur-containing adducts include terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol groups.

Abstract: Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides are useful in aerospace sealant applications. Compositions employing Michael addition curing chemistries include sulfur-containing adducts comprising terminal Michael acceptor groups. In particular, the sulfur-containing adducts include terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol groups.

Abstract: An active ray-curable inkjet ink which contains a photocurable compound, a photopolymerization initiator, a gelling agent and a non-polymerizable liquid compound that is in a liquid state at 25° C., with the liquid compound being contained in an amount of 15-50% by mass relative to the mass of the ink. Since droplets of this active ray-curable inkjet ink are prevented from combining with each other after landing, this active ray-curable inkjet ink is capable of providing high quality images. Meanwhile, the surface gloss of printed images is increased, and printed images having less coating film thickness difference (namely, less relief-like texture) can be formed.

Abstract: The photocuring efficiency of an N-oxyazinium salt photo initiator is increased by mixing it with an organic phosphine as a photoinitiator efficiency amplifier, and with an aryl aldehyde or alkyl aldehyde having a molecular weight of less than 1000. This mixture or photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment.

Abstract: An inkjet printing method includes, in order, the steps of a) jetting a radiation curable inkjet ink on the outside surface of a packaging including a substance for human or animal consumption or administration; b) curing the radiation curable inkjet ink on the outer surface of the packaging; and c) treating the radiation curable inkjet ink and the packaging including the substance with a heat treatment to kill micro-organisms present on the inside surface of a packaging; wherein the radiation curable inkjet ink includes at least 5 wt % of a (meth)acrylated silicone surfactant based on the total weight of the radiation curable inkjet ink.

Abstract: Monomers of formula (I) which include a vinyl group, polymers and articles, such as contact lenses, made therefrom, all of which are biocompatible, are described.

Abstract: A specific type of carbazole photoinitiator is capable of providing radiation curable compositions that are curable by UV LEDs and do not exhibit an unstable yellowing behavior in an image upon storage like ITX.

Abstract: An ultraviolet ray curable ink jet composition of the present invention is characterized by being adapted to be ejected using an ink jet method and containing: a polymerizable compound; metal particles subjected to a surface treatment; and a substance A having a partial structure represented by the following formula (1), where R1 is a hydrogen atom, an oxygen radical, a hydrocarbon group or an alkoxy group, and each of R2, R3, R4 and R5 is independently a hydrogen atom or a hydrocarbon group.

Abstract: A non-aqueous photopolymerizable inkjet ink, including as a photopolymerizable monomer: (a) ethylene glycol dimethacrylate; and (b) caprolactone-modified dipentaerythritol hexaacrylate or ethylene oxide-modified trimethylolpropane tri-methacrylate, or both thereof, wherein the ink includes the (a) component by 10% by mass to 95% by mass with respect to the entire photopolymerizable monomer, and the ink includes the (b) component by 5% by mass to 90% by mass with respect to the entire photopolymerizable monomer, and wherein the ink does not include a diluting solvent.

Abstract: The present invention relates to an ultraviolet-curable adhesive to be used for laminating a first optical base material and a second optical base material having a light-shielding portion on a surface thereof to each other, the ultraviolet-curable adhesive containing (A) a specified compound represented by the following formula (1), (B) a photopolymerizable compound, and (C) a photopolymerization initiator; a cured product obtained by irradiating the adhesive with an ultraviolet ray; and an optical member having the cured product, such as a touch panel:

Abstract: The invention pertains to an oligomer or polymer substituted by one or more bisacylphosphine oxide moieties, characterized in that said bisacylphosphine oxide moiety is linked via the phosphorous atom, optionally via a spacer group, to the oligomer or polymer backbone; as well as to specifically functionalized bisacylphosphine oxides, suitable to prepare said polymers or oligomers.

Abstract: An ultraviolet-curable ink composition for ink jet is for use in an ink jet recording method that includes irradiating the ultraviolet-curable ink composition for ink jet applied to a substrate with ultraviolet radiation that has a peak wavelength in the range of 380 to 405 nm from a semiconductor light source to obtain a cured coating. The product of the light transmissivity (%) of the cured coating at a wavelength of 395 nm and the irradiation energy of the ultraviolet radiation (mJ/cm2) is 2.0 or more. The ink composition contains a thioxanthone-based photopolymerization initiator and at least one of yellow coloring material and black coloring material. The OD of the cured coating made from the ink composition is 1.8 or more.

Abstract: Disclosed herein are solventborne liquid UV-curable coating compositions comprising: a radiation curable compound comprising an acrylate-terminated compound having greater than two unsaturated sites, wherein the acrylate-terminated compound comprises a reaction product of reactants comprising: an adduct of a polyisocyanate, wherein the adduct of a polyisocyanate comprises a reaction product of reactants comprising a polyisocyanate comprising greater than two isocyanate groups and a compound having groups reactive with the isocyanate groups of the polyisocyanate; and an active hydrogen-containing acrylate; and a photoinitiator composition that includes a first photoinitiator composition for providing surface cure and a second photoinitiator composition for providing through cure of the resultant coating layer. Also disclosed are related multi-component composite coatings, coated substrates, and methods for coating a substrate.

Abstract: A curable composition comprises (a) at least one polyorganosiloxane, fluorinated polyorganosiloxane, or combination thereof comprising reactive silane functionality comprising at least two hydroxysilyl moieties; (b) at least one polyorganosiloxane, fluorinated polyorganosiloxane, or combination thereof comprising reactive silane functionality comprising at least two hydrosilyl moieties; and (c) at least one photoactivatable composition comprising at least one organoborate salt selected from tetraarylborate, triarylorganoborate, diaryldiorganoborate, and aryltriorganoborate salts (and combinations thereof) of at least one base selected from amidines, guanidines, phosphazenes, proazaphosphatranes, and combinations thereof; wherein at least one of the components (a) and (b) has an average reactive silane functionality of at least three.

Abstract: Provided is a photocurable inkjet ink comprising a curable monomer, a photopolymerization initiator, a gelling agent, a colorant, and a curable oligomer. The photocurable inkjet ink is characterized in that the curable oligomer has from two to twenty functional groups, that the glass transition temperature thereof is 40° C. or higher, and that the curable oligomer content is from 2 to 20% by mass relative to the mass of the ink as a whole.

Abstract: The invention pertains to an oligomer or polymer substituted by one or more bisacylphosphine oxide moieties, characterized in that said bisacylphosphine oxide moiety is linked via the phosphorous atom, optionally via a spacer group, to the oligomer or polymer backbone; as well as to specifically functionalized bisacylphosphine oxides, suitable to prepare said polymers or oligomers.

Abstract: An object of the present invention is to provide a curable resin composition capable of being quickly cured at a low temperature by irradiation of an active energy ray such as light and having excellent storage stability, and a curing method. Furthermore, in the curable resin composition of the present invention, which uses a component (D) in combination, the active energy ray curability is more improved.

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: The inkjet ink composition includes (Component A) a polymerizable compound, (Component B) a polymerization initiator, and (Component C) a vegetable oil, in which the component B contains a compound represented by the formula (1) or (2).

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, and the photocurable compositions can be used to form various articles.

Abstract: Polycyclic aromatic compounds of formula (I) having at least two conjugated aromatic rings at least one of which has a substituent comprising a cyclic carbonate group can be used as sensitizers for cationic photoinitiators, especially iodonium compounds, and may also function as monomers in cationically initiated radiation curable compositions, especially coating compositions, such as printing inks and varnishes.

Abstract: A curing resin composition that cures in two stages: photo cure and thermal cure, hardly contaminates a liquid or liquid crystals when in contact with, and provides high adhesive strength, particularly a curing composition that photocures sufficiently even when shadowed by TFT wires, a black matrix, etc. in photocuring; and a sealant, a sealant for ODF (one-drop-fill), and an LCD containing the curing resin composition.

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: Switchable adhesives comprising a mixture, in proportions by weight, of 20% to 98% of an adhesive, 2% to 80% of curable molecules and 0.05% to 10% of photoinitiator. Preferably, the adhesive and curable molecules are mutually soluble when dry or the curable molecules and adhesive may be uniformly dispersed in each other. Preferably the amount of adhesive in the mixture is in the range 40% to 98% by weight, more preferably 60% to 95% by weight, even more preferably 70% to 85% by weight. Preferably the proportion of curable molecules in the mixture ranges from 2% to 60% by weight, more preferably 5% to 40% by weight, even more preferably 15% to 30% by weight. Preferably, the photoinitiator is present in the mixture in the proportions 0.5% to 5% by weight, more preferably 1% to 3% by weight. Such switchable adhesives are useful in medical dressings and other removable sheet products, and may be simply prepared by stirring the adhesive, the curable molecules and the photoinitiator together at room temperature.

Abstract: The present invention relates to an aminimide compound having a structure represented by the following general formula (I) in the molecule thereof, relates to a curable composition using the aminimide compound and relates to a method for curing the composition; in which R0 represents a hydrogen atom, an alkyl group which may have an optional substituent, an aryl group which may have an optional substituent, or a heterocyclic residue which may have an optional substituent. R1, R2 and R3 each independently represent a hydrogen atom, or an optional substituent. However, at least two of R1, R2 and R3 may bond to each other to form a cyclic structure.

Abstract: Provided is an ultraviolet-curable ink jet ink composition with excellent curability and storage stability, the composition containing a monomer A represented by Formula (I): CH2?CR1—COOR2—O—CH?CH—R3 (wherein R1 represents a hydrogen atom or a methyl group, R2 represents a C2-C20 divalent organic residue, and R3 represents a hydrogen atom or a C1-C11 monovalent organic residue); a (meth)acrylated amine compound; a hindered amine compound other than the (meth)acrylated amine compound; and a photopolymerization initiator.

Abstract: The active ray-curable inkjet ink comprises a gelling agent, photopolymerizable compounds and a photoinitiator, and reversibly transitions into a sol-gel phase according to the temperature. Therein: (1) a (meth)acrylate compound having a molecular weight of 300-1,500 and having 3.44 (—CH2—CH2—O—) structural units within a molecule is included as the first photopolymerizable compound at a proportion of 30-70 mass % relative to the total mass of the ink; (2) a (meth)acrylate compound having a molecular weight of 300-1,500 and a C log P value of 4.0-7.0 is included as the second photopolymerizable compound at a proportion of 10-40 mass % relative to the total mass of the ink; and (3) the gelling agent has a total of at least 12 carbon atoms, and has a straight or branched alkyl chain including at least three carbon atoms.

Abstract: A radiation-curable ink composition contains (A) aminoacrylate at 1 mass % to 10 mass %, inclusive, (B) phenoxyethyl acrylate at 20 mass % to 50 mass %, inclusive, and (C) tetraethylene glycol diacrylate at 1 mass % to 20 mass %, inclusive, in its reaction component, as well as (E) bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide at 3 parts by mass to 8 parts by mass, inclusive, (F) 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide at 3 parts by mass to 5 parts by mass, inclusive, in 100 parts by mass of the reaction component, and (G) diethylthioxanthone at 1 part by mass to 3 parts by mass, inclusive, in 100 parts by mass of the reaction component.

Abstract: The invention provides an ink composition including a sensitizer represented by the following Formula (I), a photopolymerization initiator, and a polymerizable compound having an ethylenic unsaturated bond. In the Formula (I), R1, R6 and R8 each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a linear or branched alkyl group which may be substituted, or an alkoxy group which may be substituted. R2, R4, R5 and R7 each independently represent a hydrogen atom, a halogen atom, or a cyano group. R3 represents a hydrogen atom, a linear or branched alkyl group which may be substituted, or a cycloalkyl group which may be substituted.

Abstract: Disclosed is an actinic radiation-curing type ink composition comprising (Component A) a monofunctional radically polymerizable monomer and (Component B) a polyfunctional acrylate oligomer having a glass transition temperature of no greater than 20° C. and having an acrylate equivalent of at least 300 g/eq, Component A comprising (Component A-1) an N-vinyl compound and (Component A-2) an acrylamide derivative, Component A having a content of at least 70 mass % of the entire ink composition, and Component A-1 having a content of at least 18 mass % of the entire ink composition.

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: A lithographic printing plate precursor comprising an image-recording layer, said image-recording layer being photopolymerizable upon exposure to light having a wavelength of from 300 to 500 nm and containing a mixture of sensitizers.