Abstract: A description is given of radiation-sensitive compositions composed of a binder component and low-odor polymeric reaction products composed of the reaction product of aldehydes and ketones.

Abstract: Disclosed are toner compositions comprised of a polymer, an optional colorant, and an UV light curable oligomer. Also disclosed are methods for producing a UV curable toner compositions, the toner compositions produced thereby, and methods of utilizing the UV curable toner compositions in various painting applications.

Abstract: An EB (electron beam) or UV (ultra violet) curable, low-gloss, dry-erase coating formulation for static and electronic whiteboards is disclosed. The coating contains an acrylate silica blend, an aliphatic urethane acrylate or a polyester acrylate, a polyfunctional reactive diluent and at least one photoinitiator.

Abstract: The present invention provides a photocurable and thermosetting resin composition having excellent surface curability and deep curability, allowing pattern formation with a laser beam having a wavelength of 350 to 410 nm, and being useful as a solder resist for laser direct imaging, the composition including a carboxylic resin (A), an oxime ester-based photopolymerization initiator (B) such as 2-(acetyloxyiminomethyl)thioxanthene-9-one, and another photopolymerization initiator than (B) such as 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, and a sulfur compound (E) such as 2-mercaptobenzothiazole.

Abstract: Compounds of formula (I) where: {R1 is methyl, ethyl, cycloalkyl or optionally substituted aryl; Z is arylene or a group of formula —(CHR4)n-, where R4 is hydrogen, hydroxy or alkyl, and n is a number from 0 to 6; Y is carbonyl or a —CH2— group; Q is a residue of a mono- or poly-hydroxyl compound having from I to 6 hydroxy groups; and x is a number from I to 6; and esters thereof} are useful as sensitizers for use in radiationcurable compositions.

Abstract: Photosensitive compositions which can be developed by alkali solution, comprise (A) a polymer containing at least one carboxylic acid group in the molecule and having a molecular weight of 200,000 or less, (B) selected ?-aminoalkylphenone compounds as photoinitiators and (C) an ester of a polyol, wherein the polyol is partially or fully esterified with an ethylenically unsaturated carboxylic acid a monomeric, oligomeric or polymeric compound having at least one olefinic double bond.

Abstract: A composition, including a polymer binder resin A, a UV-curing acrylate B, a heat curing agent C, and a photopolymerization initiator D. The composition includes about 20 to about 150 parts by weight of the UV-curing acrylate B per 100 parts by weight of the polymer binder resin A, and the UV-curing acrylate B is a solid or near-solid at room temperature and has a viscosity of about 10,000 cps or more at 40° C.

Abstract: Compounds of formula (I), wherein R1 is hydrogen or alkyl; R2 is C1-C4alkoxy or a morpholino radical; and R3 is hydrogen or C1-C4alkoxy, are suitable for improving the solubility of specific photoinitiators in formulations and accordingly enhance the storage stability of formulations comprising a photoinitiator and compounds of formula (I)

Abstract: The present invention relates to a coated optical fiber comprising a glass optical fiber with a single protective coating or a combination of an inner and an outer primary coating applied thereon and optionally with a colored coating subsequently applied thereon wherein the inner primary coating or at least a portion of the single coating is prepared from a radiation curable composition which when cured as a capillary film with a 100W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 54% after exposure to a dose of about 4.4 mJ/cm2 or wherein the outer primary coating is prepared from a radiation curable composition which when cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 56% after exposure to a dose of about 4.4 mJ/cm2. The invention further relates to a radiation curable composition having a high cure speed.

Abstract: Compositions and methods for coating surfaces of MLS gasket layers are disclosed. The process includes applying a coating precursor on at least one surface of one or more of the layers, and curing the coating precursor by exposure to radiation. Disclosed coating precursors include those containing an acrylated oligomer and a photoinitiator, which can polymerize in response to ultraviolet or electron beam radiation.

Abstract: Photocurable resin compositions are provided that are most useful in stereolithography. A photocurable resin includes a urethane acrylate oligomer, an acrylate monomer, and a polymerization modifier. The resin after curing provides a solid product that has characteristics that can depend on the resin composition.

Abstract: Compositions and methods for coating surfaces of MLS gasket layers are disclosed. The process includes applying a coating precursor on at least one surface of one or more of the layers, and curing the coating precursor by exposure to radiation. Disclosed coating precursors include those containing an acrylated oligomer and a photoinitiator, which can polymerize in response to ultraviolet or electron beam radiation.

Abstract: Disclosed are environmentally friendly coating compositions for coating thermoplastic olefin objects and which are curable using ultraviolet and visible radiation. Even if the coating compositions are applied to an unprimed surface, the resulting cured compositions have excellent adhesion. The cured coatings have improved adhesion properties and clear coat embodiments have improved clarity properties. In addition, methods are disclosed for coating surfaces, or at least a portion of the surfaces, and curing of the coated surface to obtain partially or fully cured coated surfaces are also disclosed. Furthermore, articles of manufacture incorporating fully cured coated surfaces are disclosed, including, for example motor-vehicle bumpers. Also disclosed are methods, processes, production lines, articles of manufacture, and factories which incorporate these environmentally friendly coating compositions.

Abstract: An oxygen scavenger composition includes an organic oxygen scavenger, a transition metal catalyst, and a blend of at least two photoinitiators selected from 1,3,5-tris(4-benzoylphenyl)benzene, thioxanthone derivative, acyl phenylphosphineoxide derivative, and diphenyl sulfide derivative. A film includes at least one layer including an organic oxygen scavenger, a transition metal catalyst, and a blend of at least two photoinitiators selected from 1,3,5-tris(4-benzoylphenyl)benzene, thioxanthone derivative, acyl phenylphosphineoxide derivative, and diphenyl sulfide derivative.

Abstract: A two-photon absorbing polymerizable composition contains at least a two-photon absorbing compound, a polymerization initiator and a polymerizable compound, the composition being photopolymerizable upon non-resonant two-photon absorption, wherein the two-photon absorbing compound is a methine dye containing a compound represented by the formula (1): wherein R1 to R5 each represents a hydrogen atom or a substituent and some of R1 to R4 may combine with each other to form a ring; n and m each independently represents an integer of 0 to 4, provided that n and m are not 0 at the same time; X1 and X2 each represents an aryl group, a heterocyclic group or a group represented by formula (2); R6 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group, and Z1 represents an atomic group for forming a 5- or 6-membered ring.

Abstract: A reactive paint to be completely cured in air with binders that bear ethylenically-unsaturated groups, that can be cured by radical polymerization either thermally or both thermally and by UV light or high-energy radiation in a dual-cure method. The paint contains a combined initiator system consisting of thermal initiators and UV initiators and reactive oligomers that are formed from addition compounds of a reactant of formula (4) and a reactant of formula (5) In this formula, X=—CO—CH?CH2 or —CnHm or —CO—CnHm. —CnHm is an aliphatic residue with 1 to 3 C atoms, whereby 0, 1, 2 or 3 X substituents are formed by —CnHm, and Y is a hydrocarbon chain of 3 to 8 atoms that can also contain heteroatoms. Also provided is a method for curing by radical polymerization. The polymerization is first started thermally under air and then is continued either thermally or photoinitiated under air or protective gas, and a use in paint systems, especially in automobile manufacturing or as a binder.

Abstract: The present invention relates to a light-degradable material for producing disposable medical appliances having main components of polypropylene resin and composite allochromatic agent, wherein the composite allochromatic agent is composed of photoinitiator and sensitizer. The photoinitiator contains ferric citrate (FeC6H5O7) and ferrous pentadione (FeC5H8O2), and the sensitizer contains hexachloroacetone (Cl6C3O) and acetylbenzene (C8H8O). The material of present invention is neither toxic nor polluted in producing or in using, and can rapidly change color while being irradiated by UV rays. Reuse of these medical appliances can be thereby avoided. When they are thrown away in nature, they will keep degrading and decay to powder within 45˜75 days. They are desired substitutes of present material for producing disposable medical appliances.

Abstract: The present invention discloses an ultraviolet light curable mar resistant composition and method for making such a composition that may be used to produce an mar resistant layer. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing.

Abstract: The present invention discloses a photocurable composition that is combinable with a thermally curable clearcoat composition to form a dual curable composition that is useful for forming clearcoats with improved sag resistance. The photocurable composition of the invention includes at least one photocurable oligomer; a first photoinitiator that absorbs light in a first spectral region such that curing of the photocurable composition preferentially occurs near the surface of the of the coating; and a second photoinitiator that absorbs light in a second spectral region such that curing of the photocurable composition occurs throughout the coating. The present invention also provides a method of coating a substrate with a dual curable composition.

Abstract: Compounds of formula Ia, Ib and Ic, (Ic), in which R, R1 and R2 are e.g. phenyl, naphthyl, anthracyl, phenanthryl or a heterocyclic radical, are suitable as photoinitiators which accumulate at the surface of coatings.

Abstract: Radiation-curable ink compositions and methods of printing including the compositions are disclosed. In some embodiments, a radiation-curable hot melt ink composition includes a colorant, a polymerizable monomer, and a photoinitiating system. The photoinitiating system can include 0.5-1.5% by weight of an aromatic ketone photoinitiator, 2-10% by weight of an amine synergist, 3-8% by weight of an alpha-cleavage type photoinitiator, and 0.5-1.5% by weight of a photosensitizer.

Abstract: The present invention discloses an ultraviolet light curable ferromagnetic composition and method for making such a composition that may be used to produce a ferromagnetic coating on a suitable substrate. These coatings may be used to produce printed capacitors and inductors. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing.

Abstract: A two-step method of polymerizing a composition containing a free radical photoinitiator includes the sequential steps of exposing the composition to a first radiation source having a maximum spectral output occurring at a wavelength of greater than 300 nm and, thereafter, exposing the composition to a second radiation source having a maximum spectral output occurring at a wavelength of less than 300 nm.

Abstract: A liquid radiation-curable composition that comprises (A) at least one polymerizing organic substance; (B) at least one free-radical polymerizing organic substance; (C) at least one cationic polymerization initiator; (D) at least one free-radical polymerization initiator; (E) at least one hydroxyl-functional compound; and (F) at least one epoxy interpenetrating polymer compound;

Abstract: Photo-curable coating formulations which comprise a durable and/or red-shifted reactable hydroxyphenylbenzotriazole ultraviolet light absorber (UVA) are effectively photocured employing a combination of &agr;-hydroxy ketone and bisacylphosphine oxide photoinitiators. The reactable UVA's are reacted into the coating upon curing. The combination of the photoinitiators bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and 1-hydroxycyclohexylphenylketone is especially effective for this purpose.

Abstract: The present invention discloses an ultraviolet light curable decorative metallic composition and method for making such a composition that may be used to produce a decorative metallic coating on a substrate. The composition comprises a novolac epoxy acrylate prepolymer, a photoinitiator and a metallic pigment. The disclosed composition does not contain any significant amount of volatile organic solvents.

Abstract: Novel benzophenone derivatives and methods of making and using the same are disclosed. The novel compounds can display highly active photoinitiation and photopolymerization properties.

Abstract: The preset invention relates to a photosensitive composition, and provides a triazine-based compound comprising new functionalized alkylthio groups of which long term storage characteristics at room temperature as well as photochemical activity as a photopolymerization initiator are superior.

Abstract: An antibacterial bonding compositions for dental use, which comprises (A) an antibacterial primer that comprises an antibacterial polymerizable monomer having an ethylenic unsaturated group and at least one or more cationic groups selected from the group consisting of ammonium bases, pyridinium bases and phosphonium bases, and a volatile solvent, and (B) an adhesive composition comprising an acid group having polymerizable monomer, a polymerizable monomer, and a polymerization initiator; and an adhesive compositions for dental use, which comprises (P) an adhesive primer comprising an acid group having polymerizable monomer, a hydrophilic polymerizable monomer, and water, and (Q) a bonding agent comprising a polymerizable monomer, and an acylphosphine oxide compound and an &agr;-diketone compound both serving as a polymerization initiator.

Abstract: Novel benzophenone derivatives and methods of making and using the same are disclosed. The novel compounds can display highly active photoinitiation and photopolymerization properties.

Abstract: Photo-initiator blends suitable for radiation curable ink formulations are disclosed which comprise a mixture of three or more photo-initiators, the mixture being a liquid at a temperature at or below ambient; the mixture comprising: (a) a first photo-initiator comprising an optionally substituted hydroxyC1-10 alkylC6-18aryl ketone which is liquid at ambient temperature; (b) a second photo-initiator comprising an optionally substituted hydroxy(cycliC3-10alkyl)C6-18aryl ketone which is solid at ambient temperature; and (c) one or more of the following photo-initiators each of which may be optionally substituted:an alpha aminoacetophenone, a C6-18aryl(((C1-10 alkyl)1-4C6-18arylcarbonyl))1-3 phosphine oxide, a benzophenone; a benzophenone derivative and/or a hydra-carob (optionally alkyl or aryl) amino benzoate; where, (i) the first photo-initiator (a) and the second photo-initiator (b) are present in the mixture in a weight ratio of from about 0.8 to about 1.

Abstract: When a resin for manufacturing ultraviolet or electron ray curable optical fiber ribbon is prepared by properly mixing a photopolymerizable urethane acrylate oligomer containing polydimethylsiloxane, monomer, photoinitiator, leveling/defoaming agent, and antioxidant, optical loss caused by bending due to surface friction in the stacking process during ribbon bonding can be minimized by increasing tensile strength and surface slipping characteristics and by minimizing the shrinkage of resin when the it is cured.

Abstract: The present invention discloses an ultraviolet light curable electroluminescent composition and method for making such a composition that may be used to produce an electroluminescent active layer. An active layer is a layer that when incorporated in a suitable device emits light when a voltage is applied. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing. It is an advantage of the present invention that the deposition of the dielectric layer in such a device is optional when the disclosed electroluminescent composition is used to deposit the active layer.

Abstract: Novel benzophenone derivatives and methods of making and using the same are disclosed. The novel compounds can display highly active photoinitiation and photopolymerization properties.

Abstract: The present invention discloses an ultraviolet light curable ferromagnetic composition and method for making such a composition that may be used to produce a ferromagnetic coating on a suitable substrate. These coatings may be used to produce printed capacitors and inductors. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing.

Abstract: The invention relates to novel reactive polymers of formula wherein the variables are as defined in the claims. The polymers of the invention are useful for the modification of material surfaces and are particularly suitable for providing biomedical articles such as contact lenses with a hydrophilic coating.

Abstract: A liquid radiation-curable composition that comprises

Abstract: This invention relates to polymeric compositions that are processible and may be photochemically cured to produce crosslinked compositions useful in coating, sealants and adhesive applications. The crosslinkable composition comprises a first component having a plurality of pendent, free-radically polymerizable functional groups; a polymeric photoinitiator, and a residual content of less than 2%. The composition is melt processable at temperatures of less than or equal to 100° C.

Abstract: The invention comprises a composition and method for controlling the gloss of surface covering products through curing of the composition to create a wearlayer surface, and preferably on a floor covering product. The surface covering product preferably is prepared by application of an aromatic polyester acrylate composition including a flatting agent and/or hard particles, and at least one free-radical generating compound to a substrate, and then the coating is partially cured by exposure to low peak irradiance UV light in either ambient or inert air, followed by fully curing the coating with high peak irradiance UV light in preferably an inert atmosphere to form a low gloss abrasion resistant wearlayer surface. Alternatively, a high gloss wearlayer surface is obtained by solely exposing the preferred composition to high peak irradiance UV light in ambient atmosphere. Furthermore, a differential gloss flooring product is obtained by using the present inventive method described herein.

Abstract: The use of phenylglyoxalic esters of the formula I in which the two radicals R1 and A are as defined in the description as photoinitiators in powder coating materials for exterior applications. The compounds of the formula I show little propensity toward yellowing.

Abstract: This invention relates to a curable coating composition which comprises: (A) a compound represented by the formula wherein in formula (A-I) each R independently is hydrogen or a hydrocarbyl group of 1 to about 8 carbon atoms, and n is a number that is about 4 or higher; and (B) a reactive vinyl or unsaturated monomer or oligomer, provided said reactive vinyl or unsaturated monomer or oligomer is not the same as (A). In one embodiment the inventive composition further comprises (C) a photoinitiator. In one embodiment, the inventive composition further comprises (D) a thermal initiator. In one embodiment, the inventive composition further comprises (E) a latent acid catalyst. The invention also relates to a method of coating a substrate utilizing the foregoing coating composition, as well as to a substrate coated in accordance with foregoing method.

Abstract: New photocationic photoinitiator combinations are described that consist of 2,4,6-triarylpyrylium salts with non-nucleophilic anions and electron donors, that are able rapidly to crosslink unpigmented as well as pigmented mixtures based on cycloaliphatic epoxides to form colourless layers such as lacquers and printing inks without generating interfering and toxic emissions.

Abstract: The present invention discloses an ultraviolet light curable mar resistant composition and method for making such a composition that may be used to produce an mar resistant layer. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing.

Abstract: This invention relates to a photopolymerizable resin composition containing resin component (A) composed of a resin and/or a resin-forming ingredient and a photopolymerization initiator (B) wherein the component (A) comprises an addition-polymerizable compound (A1) having at least two ethylenically unsaturated groups and the photopolymerization initiator (B) comprises a diaminobenzophenone compound (B1), an N-phenylglycine compound (B2), and at least one kind of compound selected from a group of a 3,3′,4,4′-tetra(alkylperoxycarbonyl)benzophenone (B3), 2-methyl-1-[4-(thiomethyl)phenyl]- 2-morpholinopropan-1-one (B4), and a 1,3,5-triazine derivative (B5) containing at least one trihalomethyl group as substituent.

Abstract: A conductive composition for a biological electrode is capable of reducing the impedance between the electrode and the skin. A conductive gel composition for a biological electrode which is capable of electrically and physically connecting a living body to an electrode element and is composed of at least the following components: (1) a radical-polymerizable unsaturated compound; (2) a moisturizer serving as a plasticizer and functioning to supplementing and promoting the physiological humidifying function of the horny layer; (3) a polymerization initiator; and (4) a crosslinking agent. This moisturizer serves also as a plasticizer and, furthermore, elevates the moisture content in the horny layer at the application of this composition. The above-mentioned composition may further contain a plasticizer selected from among polyhydric alcohols, amines and ethers.

Abstract: Novel benzophenone derivatives and methods of making and using the same are disclosed. The novel compounds can display highly active photoinitiation and photopolymerization properties.

Abstract: Compounds with chain transfer groups of the formula I, II, III and IV wherein a is 1 or 2; Ar and Ar1 inter alia are phenyl; Ar2 inter alia is phenylene, these groups being unsubstituted or substituted; X is a direct bond, —O—, —S— or —N(R6)—; Y inter alia is hydrogen or C1-C12alkyl; M1 is —NR3R4 or —OH, or M1 is Ar when R1 and R2 are alkoxy, or aryloxy; R1 and R2 independently of one another e.g. are C1-C8alkyl; R3 and R4 for example are C1-C12alkyl, or together are C3-C7alkylene; R5 inter alia is C1-C6alkylene or a direct bond; R6 is for example hydrogen; and Z is a divalent radical, provided that at least one of the radicals Ar, Ar1, Ar2, R1, R2, R3, R4, R5 or Y is substituted by SH groups; are suitable for the thermal preparation of macrophotoinitiators which are polymerized photochemically to give block-copolymers.

Abstract: This invention relates to polymeric compositions that are processible and may be photochemically cured to produce crosslinked compositions useful in coating, sealants and adhesive applications. The crosslinkable composition comprises a first component having a plurality of pendent, free-radically polymerizable functional groups; a polymeric photoinitiator, and a residual content of less than 2%. The composition is melt processable at temperatures of less than or equal to 100° C.

Abstract: A radiation curable coating comprising: (i) at least one radiation polymerizable reactant; (ii) at least one initiator for initiating cure; (iii) at least one wax; wherein the wax is present in an amount sufficient to reduce the 60° gloss of the cured coating to a gloss level less than 40 when the coating is cured by exposure to radiation in the presence of oxygen to provide a dry film thickness of 1.0±0.1 mil.

Abstract: A dual curable encapsulant is provided for use in protecting electrical components. The encapsulant contains from about 5 to about 20 percent by weight of a multifunctional epoxy material, from about 70 to about 90 percent by weight of a di-functional epoxy material, a catalytic amount of photocurative catalyst and co-catalyst, a reactive diluent and a silica-based viscosity modifier. Ink jet printer parts assembled and protected with the dual curable encapsulant exhibit enhanced ink corrosion protection.