Abstract: A resin composition for coating an optical fiber comprises a base resin containing an oligomer, a monomer, and a photopolymerization initiator, and hydrophobic inorganic oxide particles, wherein the oligomer comprises urethane (meth)acrylate and epoxy (meth)acrylate, and the mass ratio of the content of urethane (meth)acrylate to the content of epoxy (meth)acrylate is 0.25 or more.

Abstract: A photocurable resin composition for three-dimensional photofabrication operations, including stereolithography, comprising (A) a cationically polymerizable compound having two or more bisphenol structures and one or more hydroxyl groups, (B) a cationically polymerizable compound other than the component (A), (C) a cationic photoinitiator, (D) a radically polymerizable compound, (E) a radical photoinitiator, and (F) multilayer polymer particles having a core and a shell layer, the shell layer containing functional group-modified rubber polymer particles having at least one reactive functional group.

Abstract: The present invention relates to the use of oligomeric siloxane components in radiation-curable formulations which in the cured state offer a particular degree of corrosion control for metallic substrates.

Abstract: Disclosed is a graft polymerization method which has solved problems involved in use of a solvent, a radical initiator and high-energy radiation when a monomer is graft-polymerized on the surface of a polymer base. The graft polymerization method is characterized in that a polymerization product is obtained by immersing a polymer base (i) having a ketone group on the surface into a reaction system containing a monomer (ii) and then irradiating the polymer base (i) with light so that polymerization of the monomer starts from the surface of the polymer base (i).

Abstract: A flexographic printing ink for use in a flexographic printing process with wet on wet capability, comprising a polymer and a combination of liquids comprising radiation curable monomers and/or oligomers, diluents, colorants, additives, and photoinitiators, the components having the Hansen Solubility Parameters adjusted to generate an ink with a capability to form a gel having the required physical characteristics, and that is in a liquid form in the presence of a small quantity of non reactive solvent, or is brought to a liquid state during the printing process. The disclosure is also directed to a flexographic printing process with wet on wet capability based on controlled polymer or polymer segment precipitation that leads to gel formation of ink compounds by controlling the solubility parameter of the ink system.

Abstract: The resin composition of the present invention is a resin composition characterized by including (a) a polyimide, a polybenzoxazole, a polyimide precursor or a polybenzoxazole precursor, (b) 1,5-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, or 2,3-dihydroxynaphthalene, and (c) a thermal cross-linking agent having a specific structure. By the use of the resin composition of the present invention, it is possible to reduce the transmittance in the visible region of a cured film while maintaining the transmittance of a resin film before curing.

Abstract: The present invention relates to the use of alkoxysilane components in the presence of acid-generating photoinitiators in radiation-curable, free-radically crosslinkable formulations which in the cured state offer a particular degree of corrosion control for metallic substrates.

Abstract: Disclosed is a method for producing an electrolyte membrane for fuel cells, which is characterized in that a radically polymerizable monomer is graft-polymerized to a resin without using a photopolymerization initiator by bringing the radically polymerizable monomer into contact with the resin after irradiating the resin with ultraviolet light. The electrolyte membrane for fuel cells obtained by ultraviolet irradiation graft polymerization has both excellent oxidation resistance and excellent mechanical characteristics. By using such an electrolyte membrane, there can be obtained a fuel cell exhibiting extremely high performance.

Abstract: Disclosed herein are dual cure coating compositions that include (a) a melamine-group containing polyethylenically unsaturated compound and (b) an acrylate-containing compound different from (a), wherein the acrylate-containing compound is present at a level sufficient to provide a cured coating layer having a glass transition temperature of 100° C. or below and a crosslink density of 20.0 mmoles/cc or below. Also disclosed are related multi-component composite coatings, coated substrates, and methods for coating a substrate.

Abstract: The present invention relates to a resin composition for an optical material comprising (A) a carboxylic acid-modified phenoxy resin, (B) a polymerizable compound and (C) a polymerization initiator, a resin film for an optical material comprising the above resin composition and an optical waveguide having a core part and/or a cladding layer formed by using the same. Provided are a resin composition for an optical material which is excellent in a heat resistance and a transparency and which is soluble in an alkaline aqueous solution, a resin film for an optical material comprising the above resin composition and an optical waveguide produced by using the same.

Abstract: The present invention relates to a UV irradiation assisted method of surface modification, which comprises: introducing a functional group L onto the surface of a polymer material P through the photochemical reaction of a photosensitive group X under UV irradiation, wherein the photosensitive group X comprises at least one xanthone unit.

Abstract: The present invention relates to a resin composition for optical components, which is an ultraviolet-curable transparent resin composition used as a material for an optical component, in which the resin composition includes (A) an epoxy resin having two or more epoxy groups in one molecule thereof, (B) an oxetane compound having one or more oxetanyl groups in one molecule thereof and (C) a photo-acid generator, and in which the component (C) is contained in an amount of 0.01 to 2.0 parts by weight based on 100 parts by weight of a total amount of the components (A) and (B). The present invention also relates to an optical component obtained by using the resin composition for optical components, and a production method thereof.

Abstract: An object of the present invention is to provide a novel cationic photopolymerization initiator that efficiently absorbs light and generates protons. As a means of achieving the object above, a preferred cationic photopolymerization initiator of the present invention includes an initiator comprising a bismuthonium salt represented by the following general formula (II): Wherein R11, R12, and R13 may be the same or different and are each an optionally substituted monocyclic aryl group or an optionally substituted monocyclic heteroaryl group, R14 is an optionally substituted fused polycyclic aromatic group or an optionally substituted fused polycyclic heterocyclic group, and X? is an anion associated with a cation.

Abstract: Radiation curable compositions comprising at least one radiation curable oligomer obtained from the reaction of one or more carboxyl functional polyester (a) having a glass transition temperature TG and/or melting temperature Tm of less than 30° C., with (b1) one or more (meth)acrylated mono-epoxide, and/or (b2) one or more polyepoxide and one or more ?, ? unsaturated carboxylic acid.

Abstract: Disclosed is a graft polymerization method which has solved problems involved in use of a solvent, a radical initiator and high-energy radiation when a monomer is graft-polymerized on the surface of a polymer base. The graft polymerization method is characterized in that a polymerization product is obtained by immersing a polymer base (i) having a ketone group on the surface into a reaction system containing a monomer (ii) and then irradiating the polymer base (i) with light so that polymerization of the monomer starts from the surface of the polymer base (i).

Abstract: Using a photosensitive resin composition comprising a polyimide (a) having, at the end of the main chain, at least one group selected from the group consisting of a carboxyl group, a phenolic hydroxyl group, a sulfonic acid group and a thiol group, an unsaturated bond-containing polymerizable compound (b1) represented by the general formula (1), and a photopolymerization initiator (c), it is possible to conduct alkaline development and to form a polyimide film having excellent heat resistance, strength and elongation.

Abstract: This invention relates to a durable layer for in-mold decoration. The durable layer is formed from a composition comprising (i) a thermally crosslinkable and photochemically or radically graftable polymer, (ii) a non-ethylenical thermal crosslinker, and (iii) a radiation curable multifunctional monomer or oligomer. The durable layer of the present invention has excellent surface quality with a wider geometric tolerance and can be formed at low cost.

Abstract: A photosensitive resin composition which is excellent in flame resistance, resolution and flexibility, and substantially free from deposition of components thereof to prevent contamination of a product. The photosensitive resin composition comprises: (A) a cyclic phosphazene compound represented by the following general formula (1): wherein at least one of the Rs is an organic group having the urethane(meth)acrylate structure represented by the following general formula (2) and n is a positive number of 2 to 5: wherein R1 is a hydrogen atom or a methyl group; (B) a carboxyl-containing linear polymer obtained by polymerizing an ethylenically unsaturated compound through addition polymerization; (C) an epoxy resin; (D) an ethylenically unsaturated group-containing polymerizable compound; and (E) a photopolymerization initiator; wherein the cyclic phosphazene compound (A) is present in a proportion of 5 to 30 wt % based on the total weight of the composition.

Abstract: The present invention provides polyurethane systems which cure by radiation and thermal action with crosslinking, and use thereof for the production of holographic media. The polyurethane compositions of the invention comprise A) polyisocyanates, B) isocyanate-reactive block copolymers, C) compounds having groups which react on exposure to actinic radiation with ethylenically unsaturated compounds with polymerization, D) optionally free radical stabilizers and E) photoinitiators.

Abstract: The subject of the invention is a process for producing polyamide, copolyamide, polyolefin, copolyester amide or fluorocarbon resin powder particles on to the surface of which has been grafted at least one functionalized grafting monomer, characterized in that it comprises: a) a step of blending the polyamide or copolyamide powder particles with the functionalized grafting monomer; followed by b) a step of irradiating the powder impregnated with functionalized grafting monomer resulting from a) with photons (?-radiation) or electrons (?-radiation), with a dose ranging from 0.5 to 15 Mrad. The invention also relates to the particles grafted in this way and to the compositions containing such particles.

Abstract: The present invention is directed to a composition of adhering together first and second materials. The composition features a multi-functional reactive compound that includes a backbone group and first and second functional groups; a cross-linker, and a catalyst. The first functional group is responsive to a first actinic energy to form cross-linked molecules and to adhere a subset of the cross-linked molecules to the first material. The second functional group is responsive to a second actinic energy, differing from the first actinic energy to adhere to the second material.

Abstract: A polymeric surfactant formed by the reaction of an oligomeric or polymeric substrate with at least one ethylenically unsaturated monomer, wherein the reaction is conducted in the presence of a type II photo initiator and by the action of actinic radiation. The polymeric surfactant is useful for stabilising the interface in emulsions or dispersions.

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: A radiation curable phase change ink preferably used in piezoelectric ink jet devices includes an ink vehicle that includes at least one curable epoxy-polyamide gellant, and at least one colorant. The use of the gellant enables the ink to form a gel state having a viscosity of at least 103 mPa·s at very low temperatures of about 25° C. to about 100° C. The ink may thus be jetted, for example onto an intermediate transfer member surface or directly to an image receiving substrate, at very low jetting temperatures of, for example, about 40° C. to about 110° C.

Abstract: The present invention relates to radiation-curable compositions useful as ink vehicles or inks, in particular UV-curable inks, such as UV-litho inks, comprising a (meth)acrylated styrene allyl alcohol copolymer obtained from the (meth)acrylation of a styrene allyl alcohol (SAA) copolymer with (meth)acrylic acid and/or one or more alkyl(meth)acrylates, and at least one alkoxylated acrylated monomer.

Abstract: The present invention has for its object to provide a curable composition which, despite its low viscosity, gives a cured product with a high gel fraction, low residual tack, low modulus, high elongation, and good flexibility. The present invention relates to a curable composition comprising the following two components: (A) a vinyl polymer having at least one crosslinking silyl group on the average per molecule: and (B) a photocurable substance, (C) an air oxidation-curable substance, (D) a high molecular plasticizer, (E) a reactive plasticizer or (F) a compound having one silanol group in its molecule and/or a compound capable of reacting with moisture to give a compound having one silanol group in the molecule.

Abstract: In accordance with the present invention, there are provided novel thermosetting resin compositions which do not require solvent to provide a system having suitable viscosity for convenient handling. Invention compositions have the benefit of undergoing rapid cure. The resulting thermosets are stable to elevated temperatures, are highly flexible, have low moisture uptake and are consequently useful in a variety of applications, e.g., in adhesive applications since they display good adhesion to both the substrate and the device attached thereto.

Abstract: An energy curable lithographic ink composition having an asymptotic relative viscosity of about 0.4 to about 1.5 and a water up-take number of at least about 30%. Also disclosed is a method of improving various rheological properties and increasing the water window of an energy curable lithographic ink by varying the composition of the ink in order to result in an asymptotic relative viscosity of about 0.4 to about 1.5 and a water up-take number of at least about 30%. A method of identifying and selecting an energy curable lithographic ink composition having optimal press performance is also disclosed.

Abstract: It is an object to provide a photoreactive hot-melt adhesive composition which exhibits high adhesive strength immediately after combination of adherends and excellent bond strength after completion of curing and provides a highly durable bonded laminate. A photoreactive hot-melt adhesive composition containing: (a) a bisphenol F epoxy resin that assumes a solid form at ordinary temperature; (b) at least one compound selected from the group consisting of a compound represented by the following formula (1), a copolymer of tetramethylene oxide and ethylene oxide and a copolymer of tetramethylene oxide and propylene oxide; and (c) a cationic photoinitiator; R1-(OR2)n—OR3??Formula (1) (In the formula, R1 and R3 independently represent any of a hydrogen atom, a glycidyl group, and a monofunctional substituted or unsubstituted hydrocarbon group having 1–8 carbon atoms; R2 represents a bifunctional, substituted or unsubstituted hydrocarbon group having 2–8 carbon atoms; and n is an integer of 2 or larger.

Abstract: The present invention provides (meth)acrylate compounds bearing a specific maleimide group and resin compositions containing said compounds that can be cured by irradiation of light in a practical dose even when a photoinitiator is not used or used in a smaller amount than that of the prior art, and cured articles of the resin compositions.

Abstract: The invention is directed to a photo-imageable composition precursor, the precursor composition comprising: (I) finely divided particles of inorganic material comprising: Functional phase particles selected from electrically conductive, resistive, and dielectric particles; inorganic binder having a glass transition temperature in the range of from 325 to 600° C.

Abstract: The present invention has for its object to provide a curable composition which, despite its low viscosity, gives a cured product with a high gel fraction, low residual tack, low modulus, high elongation, and good flexibility. The present invention relates to a curable composition comprising the following two components: (A) a vinyl polymer having at least one crosslinking silyl group on the average per molecule: and (B) a photocurable substance, (C) an air oxidation-curable substance, (D) a high molecular plasticizer, (E) a reactive plasticizer or (F) a compound having one silanol group in its molecule and/or a compound capable of reacting with moisture to give a compound having one silanol group in the molecule.

Abstract: An ultraviolet activatable adhesive film comprising an epoxy resin, an ultraviolet activatable cationic polymerization catalyst and cationic polymerization inhibitor and water in an amount effective to suppress the cationic polymerization of the film and prolong the time from activation to thermal press-bonding after the ultraviolet activatable adhesive film is activated by irradiation by ultraviolet rays.

Abstract: A radiation curable composition comprises a heterocyclic acrylate or heterocyclic methacrylate. The composition is curable to make an optical management article such as an optical management coating on a substrate. A method of making an optical management article, comprises forming a radiation curable composition comprising the heterocyclic acrylate or heterocyclic methacrylate on a substrate and curing the composition to form the optical management article.

Abstract: A radiation curable adhesive composition which includes: a) an ?,?-olefinically unsaturated ether monomer component consisting of one or more compounds having the formula: R[O—CH?CHR1]n??(I) where R is an n-valent carbon-linked organic group R1 is H or a monovalent carbon-linked organic group and n has a value of 1 or more, b) an elastomeric polymer having a tensile strength at break of greater than 1500 psi (10342 kPa), and an elongation at break of greater than 100%, and c) a cationic photoinitiator.

Abstract: The invention relates to a radiation curable composition comprising radiation curable components wherein at least one component of the radiation curable composition contains a functional group which, when attached to an acrylate group has a calculated Boltzmann average dipole moment of higher than 3.5 Debye. The invention further relates to radiation curable optical fiber coating compositions having a high dielectric constant.

Abstract: A radiation curable, flexible, paintable composition produced from epoxy compounds and one or more polyol(s) has enhanced durability, thick and thin film adhesion, resistance to mold growth and dimensional changes while reducing solvent emissions. The composition can reduce, if not eliminate, runs and drips during the thermal bake cycles which are associated with using conventional compositions in automotive applications.

Abstract: An objective is to provide a pressure-sensitive adhesive composition which shows pressure-sensitive adhesive properties at ordinary temperature, has the ability to cure upon irradiation and after photocure exhibits improved bond strength relative to high-polarity adherends, such as PET, PVC and metals, and improved moist heat-resisting bond strength, a pressure-sensitive adhesive and a pressure-sensitive adhesive sheet obtained from the aforementioned pressure-sensitive adhesive composition. A photocurable pressure-sensitive adhesive composition containing a polyester resin having a glass transition temperature (Tg) of 25° C. or above, a cationically photopolymerizable compound and a cationic photoinitiator.

Abstract: It is an object to provide a photoreactive hot-melt adhesive composition which exhibits high adhesive strength immediately after combination of adherends and excellent bond strength after completion of curing and provides a highly durable bonded laminate.

Abstract: By means of a curing process combining thermal and UV curing it is possible, using compositions comprising (A) a coating system based on a polyacrylate polyol or polyester polyol with melamine, or a polyacrylate polyol and/or polyester polyol with a blocked or unblocked polyisocyanate, or a carboxyl-, anhydride- or amino-functional polyester and/or polyacrylate with an epoxy-functional polyester or polyacrylate, (B) an OH—, NH2—, COOH—, epoxy- or NCO-functional resin containing, in addition, at least one ethylenically unsaturated double bond, which is separated from the functional group by a spacer group, and (C) at least one photoinitiator, to obtain coatings having good surface properties.

Abstract: The present invention is directed to low intensity UV curable adhesives formulated using a blend of acrylate oligomers and monomers which are capable of bonding glass, provide improved low-yellowing properties and fast cure speed over current glass bonding adhesives, while maintaining good bond strength lo and durability comparable to, or better than, state-of-the-art glass bonding adhesives.

Abstract: Disclosed is a radiation-crosslinkable thermoplastic polymer composition, a process for the preparation thereof, an angioplasty balloon made using such a composition, and a method of using the angioplasty balloon. The composition contains a reactive monomer cross-linker, that facilitates cross-linking of the reaction product upon contact of the cross-linker-containing composition with a particle beam from a radiation source.

Abstract: A composition for coating an optical waveguide, more specifically, an optical fiber, and optical fibers coated therewith. The coating composition is a radiation curable composition including an aliphatic epoxide, a urethane acrylate oligomer, a reactive diluent, and cationic and free-radical photoinitiators. The cationic photoinitiator acts upon the aliphatic epoxide while the free-radial photoinitiator acts upon the urethane acrylate oligomer. The resulting cured coating forms an interpenetrated polymer network. The properties of coatings in accordance with the invention including the glass transition temperature thereof, can be tailored to achieve advantageous coatings suitable for use as primary coatings and secondary coatings for an optical fiber.

Abstract: A method of forming a film laminate uses an adhesive containing at least three components A, B and C. The method includes providing a radiation curable adhesive that contains a) a compound bearing at least one epoxy group, b) a compound with at least three OH groups and a molecular weight below 400 and c) a photoinitiator which initiates a polymerization of components a) and b) after exposure to light with a wavelength of 100 to 600 nm.

Abstract: There is provided an active energy beam curable composition, which is useful for forming a solder resist film for a printed wiring board, which can be developed through an ultraviolet exposure and a dilute alkali aqueous solution, and is excel lent in heat resistance, adhesivity and chemical resistance. There is also proposed a printed wiring board provided with a cured film of such an active energy beam curable composition. This composition is featured in that it comprises not only an active energy beam curable vinyl copolymer modified resin wherein an epoxy compound having an ethylenic unsaturated group is added to a copolymer comprising styrene, (metha)acrylic acid, and, as an optional component, (metha)acrylate; but also an active energy beam curable bisphenol type epoxyacrylate resin.

Abstract: A radiation curable, flexible, paintable composition produced from epoxy compounds and one or more polyol(s) has enhanced durability, thick and thin film adhesion, resistance to mold growth and dimensional changes while reducing solvent emissions. The composition can reduce, if not eliminate, runs and drips during the thermal bake cycles which are associated with using conventional compositions in automotive applications.

Abstract: A monomer composition which provides a plastic optical material having high refractive index and Abbe number, a low specific gravity and excellent physical properties, such as dyeing properties, heat resistance, impact resistance and the like. The composition comprises a di(meth)acrylate compound, divinylbenzene and/or divinylbiphenyl, a crosslinking-type isocyanate compound, a polythiol compound having two or more thiol groups, and a thiourethane bonding accelerating compound. The plastic optical material obtained by the reaction of the above composition with a radical polymerization initiator is used as a material for a lens.

Abstract: The present invention relates to stereolithographic compositions containing an actinic radiation-curable and cationically polymerizable organic substance, a cationic initiator, a radical photoinitiator, and at least one cationic reactive modifier containing at least two reactive groups per molecule or at least one polyether polyol or mixtures thereof. The cationic reactive modifier has at least one chain extension segment with a molecular weight of at least about 100 and not more than about 2,000. The polyether polyol has a molecular weight greater than or equal to about 4,000. The use of the cationically reactive modifiers and polyether polyol modifiers substantially increases the flexibility and toughness of the cured articles without compromising photospeed, accuracy and wetting-recoatability of the compositions. The present invention further relates to a method of producing a cured product, particularly three-dimensional shaped articles by treating the composition described above with actinic radiation.

Abstract: A curable composition which comprises the following two components: (I) a vinyl polymer having at least one crosslinkable silyl group represented by the general formula (1) given below, and (II) an epoxy resin or a polyether polymer having at least one crosslinkable silyl group; —[Si(R1)2−b(Y)bO]m—Si(R2)3−a(Y)a  (1) {wherein R1 and R2 each represents an alkyl group containing 1 to 20 carbon atoms, an aryl group containing 6 to 20 carbon atoms, an aralkyl group containing 7 to 20 carbon atoms, or a triorganosiloxy group represented by the formula (R′)3SiO— (in which R′ represents a monovalent hydrocarbon group containing 1 to 20 carbon atoms and the three R's may be the same or different) and, when there are two or more R1 or R2 groups, they may be the same or different; Y represents a hydroxy group or a hydrolyzable group and, when there are two or more Y groups, they may be the same or different; a represents 0, 1, 2 or 3; b represents

Abstract: The invention provides an adhesive formulation for tacking and holding a nozzle plate in alignment on a semiconductor chip for an ink jet pen of an ink jet printer. The adhesive formulation includes a multifunctional epoxy material, a difunctional epoxy material, a fumed silica viscosity control agent, an imidazole-based thermal initiator and a mixed aryl sulfonium salt photoinitiator. Use of the adhesive formulation enables a nozzle plate to be assembled to a semiconductor chip with while substantially maintaining critical alignment between the nozzle plate and semiconductor chip.