Abstract: Disclosed is a photocurable resin composition for additive fabrication comprising a polymerizable component that is polymerizable by free-radical polymerization, cat ionic polymerization, or both free-radical polymerization and cationic polymerization, and a photoinitiating system capable of initiating the free-radical polymerization, cationic polymerization, or both free-radical polymerization and cationic polymerization. The photocurable resin composition is a liquid at about 25° C., and is capable of curing to provide a solid upon irradiation with light emitted from a light emitting diode (LED), wherein the light has a wavelength of from about 100 nm to about 900 nm. Also disclosed is a three-dimensional article prepared from the photocurable resin composition for additive fabrication, and a process for preparing three-dimensional articles by additive fabrication.

Abstract: The invention concerns dental compositions. Said composition comprises (1) a silicone crosslinkable and/or polymerizable by cationic process; (2) an efficient amount of at least an initiator such as an organometallic complex borate; and (3) a dental filler present in the composition in a proportion of at least 10 wt. % relative to the composition total weight. Said dental compositions are useful for making dental prostheses or for dental restoration.

Abstract: Curable solid ink compositions, comprising a curable wax having a melting point under 40° C. as part of the ink vehicle, which are suitable for ink jet printing in applications that require high and/or variable levels of gloss. In particular, there is provided a novel high gloss, ultraviolet (UV) curable, phase change ink composition comprising a colorant and an ink vehicle comprising a gellant, a reactive diluent, a photoinitiator package, and a curable acrylate wax.

Abstract: Provided is a photo-curable transparent resin in which an oxetane monomer for promotion of photo-curing, control of viscosity, and improvement of physical properties is mixed with a photo-cationically polymerizable cyclo-aliphatic epoxy group-containing oligosiloxane resin prepared by a sol-gel reaction. The photo-cationically polymerizable photo-curable transparent resin added with the oxetane monomer provides a cured product having high curing density and retaining excellent mechanical properties, thermal-mechanical properties, and electrical properties.

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: 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: A photocationically polymerizable adhesive composition and an optical member, the photocationically polymerizable adhesive composition including about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds, about 0.1 to about 5 parts by weight of a titanate coupling agent, and about 0.1 to about 20 parts by weight of a photopolymerization initiator, wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.

Abstract: The disclosure provides a new photopolymerizable resin system for dental restorative materials. The resin system utilizes a thiol-ene component as the reactive diluent in dimethacrylate systems. The ternary resin system comprises a thiol monomer, an ene monomer and a dimethacrylate monomer. Use of an off-stoichiometric ratio of thiol:ene functional groups in favor of excess thiols results in enhanced overall functional group conversion, improved polymer mechanical properties, and reduced shrinkage stress of the ternary system when compared to either traditional dimethacrylate or thiol-ene resin systems.

Abstract: The present invention relates to a kind of high oil-absorbable resin (HOAR) comprising of acrylic polymers and its preparation methods and uses. High oil-absorbable resin as described includes following compositions by weight percentage: monomer of polymer flexible chain 50%-95%; monomer of polymer rigid chain 5%-50%; crosslinkers accounting for 0.2-5 wt % of total weight of above described monomers; and solvents weighing 1.5 to 4 folds of total weight of above described monomers. High oil absorption resin as described is prepared by free radical polymerization in solution at room temperature under ?-ray irradiation. The preparation process is simple with easily controlled reaction conditions, which can reduce energy consumption and provide safety and environmental protection, and thus it's suitable for industrial production.

Abstract: A coating composition is provided comprising (A) a co-hydrolytic condensate of a UV-absorbing alkoxysilane, a UV-curable alkoxysilane, and a tetraalkoxysilane, (B) a polyfunctional poly(meth)acrylate, and (C) a photobleachable photopolymerization initiator. Upon exposure to UV, the composition cures briefly at low temperature to form a cured film having durability, adhesion and transparency.

Abstract: The present invention relates to a process for the manufacturing of continuously shaped cured silicone articles, particularly extrusions articles and the use of silicone compositions containing a photoactivatable metal catalyst in said process, wherein the curing is initiated by visible or UV-light.

Abstract: A curable divinylarene dioxide resin composition including (a) at least one divinylarene dioxide, (b) at least one cationic photoinitiator, and (c) optionally, at least one pigment material; a process for making the curable divinylarene dioxide resin composition; and a cured divinylarene dioxide resin composition made therefrom. The cured product made from the above curable divinylarene dioxide resin composition offers improved properties and are useful for various applications including ink formulations.

Abstract: Curable, phase-change compositions and inks used for printing three-dimensional objects including a curable monomer, a photoinitiator, a wax and a gellant, where the composition of the cured formulation has a room temperature modulus of from about 0.01 to about 5 Gpa. The curable monomer includes acrylic monomer, polybutadiene adducted with maleic anhydride, aliphatic urethane acrylate, polyester acrylate, 3-acryloxypropyltrimethoxysilane, or acryloxypropyl t-structured siloxane.

Abstract: A photocurable fixture for orthopedic surgery has a base material and a photocurable resin retained in the base material and containing a urethane (meth)acrylate oligomer and a photopolymerization initiator which absorbs a light within a range of 400 to 700 nm. The urethane (meth)acrylate oligomer being represented by the following formula (I), where A denotes a diisocyanate residue, and each of X and Y denotes a residue obtained by removing a hydroxy group from a (meth)acrylate having a hydroxy group. In formula (I) at least 40 mol % of X and Y is a residue obtained by removing a hydroxy group from a (meth)acrylate having a hydroxy group represented by the following formula (II), where in Formula (II) each of R1 to R6 denotes a hydrogen atom or a methyl group.

Abstract: The present invention provides 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.

Abstract: A sealant for a one drop fill process is characterized by curing through two steps consisting of photocure using visible light from which 400 nm or shorter wavelengths are cut off and thermal cure and, when in contact with a liquid crystal composition, is less contaminating to the liquid crystal composition with a photo radical initiator, and exhibits high adhesive strength to a substrate. The sealant contains (1) a titanocene photo radical initiator, (2) a photocuring resin, (3) a latent epoxy curing agent and, if necessary, (4) a monomer having at least two glycidyl ether groups per molecule as a thermosetting resin.

Abstract: A process for producing a cured coating is provided that includes a step of forming on a substrate layer of a curable composition that includes at least one compound represented by Formula (I) and a step of curing the layer of the curable composition by irradiation with electron beam. In formula (I) , Q1 denoted a cyano group or a —COX2 group, X1 denoted a hydrogen atom, organic residue, or polymer chain bonded to carbon atom CA via a heteroatom, or a halogen atom, X2 denoted a hydrogen atom, organic residue, or polymer chain boned to the carbonyl group via a heteroatom, or a halogen atom, Ra and Rb independently denote a hydrogen atom, a halogen atom, a cyano group, or an organic residue, and X1 and X2, Ra and Rb, and X1 and Ra or Rb may be bonded to each other to form a cyclic structure. There is also provided an electron beam-curable composition that includes a compound represented by Formula (I).

Abstract: A photocationically polymerizable adhesive composition and an optical member, the photocationically polymerizable adhesive composition including about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds, about 0.1 to about 5 parts by weight of a titanate coupling agent, and about 0.1 to about 20 parts by weight of a photopolymerization initiator, wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.

Abstract: Improvedly storage stable dental compositions useful for the preparation of dental prostheses and for dental restoration containing a uniquely pretreated dental filler material.

Abstract: The disclosure is directed to a composition includes a macromer having a polymeric backbone comprising units with a 1,2-diol or 1,3-diol structure and at least two pendant chains bearing crosslinkable groups, an amphiphilic comonomer, and a crosslinking initiator, wherein the composition has a setting time of less than about 3 minutes. The disclosure is further directed to a kit and a method of making the above-mentioned composition.

Abstract: A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.

Abstract: An encapsulant composition is provided, including at least one resin monomer, a filler and a photoinitiator, wherein the at least one resin monomer is selected from the group consisting of acrylic resin monomer, epoxy resin monomer, silicone resin monomer and compositions thereof, and the filler is of about 0.1˜15 weight % of the encapsulant composition. A method for forming encapsulant materials is also provided.

Abstract: De-polluting, self-cleaning coating compositions are disclosed which comprise photocatalytic titanium dioxide and a binder comprising an epoxy siloxane polymer. The compositions produce durable, self-cleaning coatings with photocatalytic activity against pollutants in the air, such as NOx compounds.

Abstract: A photosensitive resin composition comprises: 0.01 wt %-10 wt % of reflective particles; 0 wt %-12 wt % of pigment; 1 wt %-10 wt % of dispersant; 1.5 wt %-5 wt % of dispersion resin; 2 wt %-25 wt % of optically active polymer; 1 wt %-22 wt % of optical active monomer; 0.4 wt %-5 wt % of epoxy resin; 5 wt %-85 wt % of solvent; 0.1 wt %-3 wt % of photoinitiator; and 0.01 wt %-3.5 wt % of additives.

Abstract: An ink composition is provided that includes (A) one type of compound (monomer (A)) selected from the group consisting of a difunctional (meth)acrylic acid ester or amide having an alkylene group of 6 to 12 carbons, and a difunctional vinyl ether having an alkylene group of 6 to 12 carbons, (B) a polymerization initiator, and (C) a colorant. There is also provided an inkjet recording method that includes a step (a) of discharging the ink composition onto a recording medium and a step (b) of irradiating the discharged ink composition with actinic radiation so as to cure the ink composition. Furthermore, a process for producing a lithographic printing plate is provided that includes a step (a?) of discharging the ink composition onto a hydrophilic support and a step (b?) of irradiating the discharged ink composition with actinic radiation so as to cure the ink composition, thus forming a hydrophobic image on the hydrophilic support by curing the ink composition.

Abstract: An encapsulant composition is provided, including at least one resin monomer, a filler and a photoinitiator, wherein the at least one resin monomer is selected from the group consisting of acrylic resin monomer, epoxy resin monomer, silicone resin monomer and compositions thereof, and the filler is of about 0.1˜15 weight % of the encapsulant composition. A method for forming encapsulant materials is also provided.

Abstract: The invention provides an epoxy nanocomposite material for dental therapy, which can be applied to direct or indirect clinical restoration, dental core-post system, and dental brace etc. The epoxy nanocomposite filling material provided by the invention can be polymerized with various curing agents to form the polymer with low shrinkage.

Abstract: The invention relates to an actinic radiation-curable coating composition comprising a compound having at least two isocyanate groups, a compound having at least two hydroxyl groups, and a photolatent catalyst for the isocyanate-hydroxyl addition reaction, wherein the photolatent catalyst is an organic metal compound comprising a latent catalytically active metal, and wherein the latent catalytically active metal atom in the organic metal compound has no bonds to other metal atoms. The invention further relates to a process for forming a coating on a substrate.

Abstract: There is provided a photosensitive resin composition comprising: (a) 100 parts by weight of a polyorganosiloxane obtained by a method of combining at least one silanol compound represented by the following formula (1): R12Si(OH)2??(1) {the groups in the formula being defined in the claims}, at least one alkoxysilane compound represented by the following formula (2): R2aR3bSi(OR4)4-a-b??(2) {the groups in the formula being defined in the claims} and a catalyst, and polymerizing them without active addition of water; (b) 1-50 parts by weight of a photopolymerization initiator; (c) 40-600 parts by weight of a fluorene compound represented by the following formula (3): {the groups in the formula being defined in the claims}; and (d) 20-300 parts by weight of a compound other than component (c), having one or two (meth)acryloyl groups in the molecule.

Abstract: An antibacterial measure using titanium oxide includes mixing titanium oxide in a resin to form a coating resin, and then coating a key surface with the coating resin. This method requires formation of a coating layer on a resin molding and thus increases the number of the production steps and cost. Furthermore, in the method, a coating film containing an antibacterial agent is scraped off light by little at each time of keying, and thus the film is finally completely removed to lose its antibacterial function. A conceivable measure against this includes directly mixing a resin and an antibacterial agent. However, titanium oxide used as an antibacterial agent degrades a raw material resin. It has recently be thought that photocatalytic apatite as a substitute for titanium oxide also causes chalking, and an antibacterial coating layer has been formed on a surface of a resin molding.

Abstract: Stable and substantially filled cationic dental compositions are described which include: (1) at least one cationically reactive compound (A); (2) at least one dental filler (B); (3) optionally, at least one dispersant (C) composed of at least one organic polymer or copolymer; (4) at least one cationic photoinitiator (D); and (5) optionally, at least one photosensitizer (E). The dental filler (B) is treated with at least one organosilicon coupling agent (F), and at least one compound (G). The organosilicon coupling agent (F) has at least one reactive function (rfA) directly linked to a silicon atom forming after activation of a chemical bond with the dental filler, and at least one reactive function (rfB) not directly linked to a silicon atom, forming after activation, a chemical bond with a reactive function (rfC) of the compound (G).

Abstract: A primer coating composition for a metal substrate is described. The primer has a suitable binder and is characterized in that there is at least one semiconductor photocatalyst dispersed throughout the primer coating composition. A process of coating a metal substrate is also described. The invention extends to the use of a semiconductor photocatalyst as a top-coat to primer adhesion promoter or as a primer to top-coat delamination inhibitor in a primer coating composition.

Abstract: The present invention relates to initiators of the general formula {[M(L)a]Xb}n, wherein said initiators preferably have (SbF6?) as a counterion and are obtainable by a complexing reaction of a corresponding metal-SbF6 salt with a corresponding ligand (L). The present invention further relates to preparations and epoxy resin systems that contain such initiators and, in particular, are non-thermally and/or thermally curable.

Abstract: An ink composition is provided that includes a cationically polymerizable compound (a), a compound (b) that generates an acid when exposed to radiation, a colorant (c), and a salt of a weak acid having a pKa of 4 to 8 (d). There is also provided an inkjet recording method that includes a step of discharging the ink composition onto a recording medium, and a step of irradiating the discharged ink composition with radiation so as to cure the ink composition.

Abstract: The invention provides a photocurable liquid rubber composition containing a liquid styrene-butadiene copolymer having, at each end of a molecular chain thereof, a functional group having a photocurable unsaturated hydrocarbon group, a (meth)acryloyl group-containing monomer, and a photopolymerization initiator. The composition can be used without solvent, which realizes easy control of the viscosity thereof, and which exhibits high break strength after curing.

Abstract: An ultra violet light transmitting polymer is obtainable by the polymerisation of at least one compound having a substantially non UV absorbing core group comprising; linear or branched aliphatic hydrocarbons which may contain an aliphatic ring; or polydialkylsiloxanes. The compounds have at least one functional group comprising formula (A), (B) or (C):and each of the groups —R3— are, independently, linking groups which may be present or absent and, where present, may be a C1 to C10 hydrocarbon chain, which may contain an ether linkage. Methods for producing the polymers and uses for the polymers are also described.

Abstract: Provided is a radiation-curable silicone rubber composition comprising: (A) a specific organopolysiloxane, which at each molecular chain terminal contains two or three silicon-containing groups that each contain a plurality of (from 2 to 9) (meth)acryloyl groups (in other words, a specific organopolysiloxane containing from 8 to 54 (meth)acryloyl groups within each molecule); and (B) a radiation sensitizer. The composition cures easily and favorably upon irradiation with low intensity, low energy radiation, and in particular upon irradiation with ultraviolet light emitted from a UV-LED light source. A cured coating generated from the composition rapidly develops favorable adhesion to a wide variety of substrates, and provides excellent corrosion prevention for the substrate, even under severe conditions.

Abstract: It has been discovered that an initiation reaction is efficiently progressed to a propagation reaction by adding a compound that potentially or directly generates a carbocation to the polymerization system of a cationic ring-opening polymerizable compound, and thus the activation of polymerization is rendered. Namely, the present invention relates to a cationic polymerizable resin composition which is characterized by comprising (A) a compound having at least one functional group capable of cationic ring-opening polymerization in one molecular chain, (B) a cationic polymerization initiator, and (C) a compound to generate a carbocation by the action of active species generated from (B) the cationic polymerization initiator by electromagnetic wave or particle beam.

Abstract: The invention relates to the use of an infrared absorber for accelerating the UV curing of a mass to be cured. The infrared absorber is preferably selected from ATO, ITO, ZnO, LaB6 and a mixture of said substances. A casting resin is preferably used as the mass to be cured, in particular a resin based on an acrylic resin or an acrylate resin. The invention permits the production of laminated panes, in which the starting mass is applied between the panes and converted to form the laminate.

Abstract: Radiation curable compositions, such as UV curable ink compositions, contain a polymeric dispersant, a curable material, and a nanoscale pigment particle composition including an organic monoazo laked pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.

Abstract: An encapsulant composition is provided, including at least one resin monomer, a filler and a photoinitiator, wherein the at least one resin monomer is selected from the group consisting of acrylic resin monomer, epoxy resin monomer, silicone resin monomer and compositions thereof, and the filler is of about 0.1˜15 weight % of the encapsulant composition. A method for forming encapsulant materials is also provided.

Abstract: A fixture for orthopedic surgery comprises a photocurable resin containing a urethane type (meth)acrylic acid derivative oligomer obtainable by a polyisocyanate having at least three isocyanate group, and a (meth)acrylic acid derivative having an active hydrogen group; and a photopolymerization initiator which absorbs light of 400 to 700 nm. The photocurable resin is retained in a base material to form a support material. The inner side of the support material is covered with a buffer material and the outer side thereof is covered with a cover material to obtain a splint material as a fixture for orthopedic surgery. The buffer material side of the splint material is put on an affected part of the body and a bandage is wound over it, and then molding is carried out using irradiation with visible light to cure the photocurable resin. As the curing proceeds, a splint is obtained for fixing and supporting the affected part.

Abstract: Composition with at least one polymerizable binder and at least one polymerization initiator, which contains at least one acylgermanium compound according to general Formula (I), in which R0 is a substituted or unsubstituted C1-18-alkyl radical or an acyl group; R1 and R2 are H, an acyl group or have one of the meanings given for R3; R3 is a branched or linear C1-18-alkyl radical which can be unsubstituted or substituted one or more times by —O—, —NH—, —NR—, —S— or interrupted by other groups, trimethylsilyl, hal-(CH3)2Si—[OSi(CH3)2]r?, (CH3)3Si—[OSi(CH3)2]r—, —COOH, —COO—R10, —CO—NR11R12, —CO-vinyl, —CO-phenyl, phenyl-C1-4-alkyl, phenyl, naphthyl or biphenyl, C5-12 cycloalkyl, a 5 or 6-membered O, S or N-containing heterocyclic ring, halogen, OH, an aromatic C6-30 radical which can be substituted or unsubstituted and/or interrupted by O, S or —NR—, or a branched, cyclic or linear C1-20 alkyl, -alkenyl, -alkoxy or -alkenoxy radical; m is 1, 2 or 3; n is 0 or 1 and p is 0 or 1; wherein in each case two of

Abstract: Composition with at least one polymerizable binder and one polymerization initiator, which contains at least one acylgermanium compound according to general Formula (I), and the use of acylgermanes of Formula (I) as initiators for radical polymerization or for the preparation of dental restorations.

Abstract: The present invention relates to the field of acrylic polymers and in particular to their modification with the purpose of the formation of compounds of still higher molecular masses. Plastic materials of the type of acrylic universal polymer (PAU), e.g. sold under the tradename “POLYGOR”, can be used as starting material. The acrylic starting material is then modified by appropriate modifier compounds. In this way modified polymers can have molecular weights in the range between 2×105 and 15×107 a.u. and are water-soluble. This allows to use them as flocculation, coagulation, ion-exchange means and as additives to surface active agents for raising their washing and foaming capabilities.

Abstract: The invention provides a colorant-containing curable composition including a colorant and a solvent, wherein the colorant includes a compound represented by Formula (I) and/or a tautomer thereof, and the solvent includes at least one selected from the group consisting of cyclohexanone, cyclopentanone, propyleneglycol methyl ether, propyleneglycol methyl ether acetate, a lactate ester, and diacetone alcohol. The invention further provides a color filter manufactured by using the colorant-containing composition and a manufacturing method of the color filter.

Abstract: A subject for the invention is to provide a method of refractive index regulation by which the refractive index of an optical polymer molding can be efficiently changed without necessitating a complicated step, such as the step of oxidizing beforehand, and which when used for producing an optical device, imparts excellent transparency thereto. Another subject is to provide a photochemically refractive-index-changing polymer or photochemically refractive-index-changing polymer composition for use in the method.

Abstract: The present invention provides a novel photocurable composition containing an organic polymer having an epoxy group and/or oxetane group-containing silicon group at an end and a cationic photoinitiator. For example, the photocurable composition contains an organic polymer (A) having an epoxy group and/or oxetane group-containing silicon group at an end, and a cationic photoinitiator (B), the organic polymer (A) being produced by addition reaction between an organic polymer terminated with an unsaturated group and a hydrosilane compound having an epoxy group and/or an oxetane group.

Abstract: The present invention relates to a polymerizable composition comprising a cycloaliphatic epoxide compound, a monovalent alcohol, a photopolymerization initiator, wherein the molar ratio of the epoxide groups of the cycloaliphatic epoxide to the hydroxyl groups of the monovalent alcohol is 0.9:1.0 to 4.0:1.0 and the hydroxyl functionality of all organic compounds of the polymerizable composition having OH group(s) is in the range of 1.0 to 1.25.