Abstract: In an aspect, a curable composition comprises an acid catalyzed urethane (meth)acrylate oligomer comprising an acid catalyst; a cyanoacrylate monomer; a metallocene compound; a free radical polymerization inhibitor; and an acidic anionic polymerization inhibitor. In yet another aspect, a method of making a cured composition comprises forming the curable composition; and curing the curable composition by exposing it to light to form the cured composition.

Abstract: In an aspect, a method of filling a plurality of cooling holes in an airfoil component, the method comprises injecting a curable composition into a fill channel such that the curable composition flows through the fill channel to the plurality of cooling holes; forming a plurality of beads of the curable composition on a surface of the component over the plurality of cooling holes; directing a radiation to the respective beads in directions parallel to the respective central axes of the cooling holes associated with the respective beads to cure curable composition of the respective beads; and heating the component to cure the curable composition located in the fill channel.

Abstract: In some embodiments, the present invention is a method, comprising: a) mixing at least one polymerizable acrylic compound, a thermal initiator, a photoinitiator, and a peroxide to form a mixture, wherein the peroxide has a decomposition temperature; b) exposing the mixture to light for a sufficient first time to generate a first curing agent; and c) after exposing the mixture to light, exposing the mixture to a temperature below the decomposition temperature of the peroxide for a sufficient second time to generate a second curing agent.

Abstract: A method for shielding a metal substrate surface during the application of heat to the surroundings of the substrate which comprises. A liquid maskant composition is formed which comprises: a) at least one of a polycarbonate urethane diacrylate oligomer, a polycarbonate urethane dimethacrylate oligomer, a polycarbonate caprolactone urethane diacrylate oligomer, or a polycarbonate caprolactone urethane dimethacrylate oligomer; b) a reactive diluent capable of free radical polymerization; and c) a photoinitiator capable of generating free radicals when exposed to actinic radiation. The maskant composition is applied onto a surface of the substrate. The maskant composition is then exposed to sufficient actinic radiation to polymerize or crosslink the composition into a dried maskant. In use the dried maskant is heated on the substrate to a temperature of from about 400° F. to about 600° F. for from about 20 minutes to about 30 minutes, and then the maskant is removed.

Abstract: A self adjusting chain mechanism for use with an undercutter attached to an excavator having hydraulic means for adjusting the undercutter; the self adjusting mechanism has a chain and sprocket assembly in a sprocket holding frame, a ram and piston, all operating in conjunction with the hydraulics of the excavator with a control system to move an adjuster shaft connected to the chain sprocket assembly, so as to cause the chain to tighten in response to the changes in hydraulic pressure.

Abstract: The invention provides intermediates of the formula: as well as a method of their preparation by reacting a thiol having at least two hydroxyl groups with a mono-unsaturated organic compound in the presence of a base catalyst. A polymerizable urethane acrylate oligomer or urethane methacrylate oligomer is formed by reacting a polyisocyanate with the intermediate. The polymerizable urethane acrylate oligomer or urethane methacrylate is blended with a polymerization initiator to form a composition which is useful in such applications as adhesives.

Abstract: A method of preparing a flexible, substantially tack free gasket by forming a liquid composition which is a radiation polymerizable admixture of a free radical polymerizable urethane(meth)acrylate monomer, free radical polymerizable urethane(meth)acrylate oligomer, or combinations thereof; a free radical polymerizable diluent; a free radical polymerization photoinitiator; a wax; a thixotropic agent; and optionally an adhesion promoter and a colorant. The composition is distributed onto a substrate and then exposed to actinic radiation to cure the liquid composition into a flexible, substantially tack free gasket having a Shore A hardness of from about A20 to about A80.

Abstract: A coating composition capable of curing to a high hardness by exposure to sunlight. More particularly, the coating composition comprises a high molecular weight polyurethane (meth)acrylate or methacrylate dissolved in one or more non-alcohol solvent, a visible light photoinitiator, and an alcohol solubilizer.

Abstract: A dual curable, liquid adhesive composition capable of polymerization by exposure to actinic radiation and moisture. The composition is particularly useful for liquid adhesives for electronic applications. The composition comprises an alkoxysilane functional polyurethane acrylate oligomer; a free radical polymerizable reactive diluent; a free radical photoinitiator; a catalyst for moisture curing of silane groups; and an optional alkoxysilane functional oligomer having a polyolefin group; an optional acrylate or methacrylate functional polyurethane acrylate oligomer; an optional hydroxyl terminated monoacrylate or monomethacrylate functional reactive diluent; an optional UV-absorber and hindered amine light stabilizer antioxidant; an optional wax capable of reducing oxygen inhibition; an optional 1,3 dicarbonyl compound chelating agent; an optional thixotropic agent; and an optional adhesion promoter. optional adhesion promoter.

Abstract: A dual curable, liquid adhesive composition capable of polymerization by exposure to actinic radiation and moisture. The composition is particularly useful for liquid adhesives for electronic applications. The composition comprises an alkoxysilane functional polyurethane acrylate oligomer; a free radical polymerizable reactive diluent; a free radical photoinitiator; a catalyst for moisture curing of silane groups; and an optional alkoxysilane functional oligomer having a polyolefin group; an optional acrylate or methacrylate functional polyurethane acrylate oligomer; an optional hydroxyl terminated monoacrylate or monomethacrylate functional reactive diluent; an optional UV-absorber and hindered amine light stabilizer antioxidant; an optional wax capable of reducing oxygen inhibition; an optional 1,3 dicarbonyl compound chelating agent; an optional thixotropic agent; and an optional adhesion promoter. optional adhesion promoter.

Abstract: A coating composition capable of curing to a high hardness by exposure to sunlight. More particularly, the coating composition comprises a high molecular weight polyurethane (meth)acrylate or methacrylate dissolved in one or more non-alcohol solvent, a visible light photoinitiator, and an alcohol solubilizer.

Abstract: The invention provides intermediates of the formula: as well as a method of their preparation by reacting a thiol having at least two hydroxyl groups with a mono-unsaturated organic compound in the presence of a base catalyst. A polymerizable urethane acrylate oligomer or urethane methacrylate oligomer is formed by reacting a polyisocyanate with the intermediate. The polymerizable urethane acrylate oligomer or urethane methacrylate is blended with a polymerization initiator to form a composition which is useful in such applications as adhesives.

Abstract: The invention provides intermediates of the formula: as well as a method of their preparation by reacting a thiol having at least two hydroxyl groups with a mono-unsaturated organic compound in the presence of a base catalyst. A polymerizable urethane acrylate oligomer or urethane methacrylate oligomer is formed by reacting a polyisocyanate with the intermediate. The polymerizable urethane acrylate oligomer or urethane methacrylate is blended with a polymerization initiator to form a composition which is useful in such applications as adhesives.

Abstract: A two part composition comprising a Part A and a Part B, wherein Part A comprises an oligomer having both isocyanate and acrylate moieties, and an organic peroxide capable of generating free radicals upon decomposition; and Part B comprises a polyol, and a catalyst that can decompose the organic peroxide. In one form, the two part composition of a Part A and a Part B are in admixture. By combining Part A and Part B the isocyanate moieties react with the polyol to produce a combination of a urethane acrylate oligomer, organic peroxide and the catalyst. Then in either order, the combination is exposed to sufficient actinic radiation to polymerize at least a portion of the urethane acrylate oligomer; and the catalyst decomposes the organic peroxide thus generating free radicals, which free radicals polymerize at least a portion of the urethane acrylate oligomer.

Abstract: A method for shielding a metal substrate surface during the application of heat to the surroundings of the substrate which comprises. A liquid maskant composition is formed which comprises: a) at least one of a polycarbonate urethane diacrylate oligomer, a polycarbonate urethane dimethacrylate oligomer, a polycarbonate caprolactone urethane diacrylate oligomer, or a polycarbonate caprolactone urethane dimethacrylate oligomer; b) a reactive diluent capable of free radical polymerization; and c) a photoinitiator capable of generating free radicals when exposed to actinic radiation. The maskant composition is applied onto a surface of the substrate. The maskant composition is then exposed to sufficient actinic radiation to polymerize or crosslink the composition into a dried maskant. In use the dried maskant is heated on the substrate to a temperature of from about 400° F. to about 600° F. for from about 20 minutes to about 30 minutes, and then the maskant is removed.

Abstract: A method of preparing a flexible, substantially tack free gasket by forming a liquid composition which is a radiation polymerizable admixture of a free radical polymerizable urethane(meth)acrylate monomer, free radical polymerizable urethane(meth)acrylate oligomer, or combinations thereof; a free radical polymerizable diluent; a free radical polymerization photoinitiator; a wax; a thixotropic agent; and optionally an adhesion promoter and a colorant. The composition is distributed onto a substrate and then exposed to actinic radiation to cure the liquid composition into a flexible, substantially tack free gasket having a Shore A hardness of from about A20 to about A80.

Abstract: An undercutter attachable to utility machines has a bar with chain having teeth for cutting into rock beds, whereby the chain rotates about the bar. The bar has removable top and bottom portions, which when in place and secured, provide a channel for the chain, and when the top and bottom portions are removed, allow for replacement of worn parts without loosening or removing the chain.

Abstract: A self adjusting chain mechanism for use with an undercutter attached to an excavator having hydraulic means for adjusting the undercutter; the self adjusting mechanism has a chain and sprocket assembly in a sprocket holding frame, a ram and piston, all operating in conjunction with the hydraulics of the excavator with a control system to move an adjuster shaft connected to the chain sprocket assembly, so as to cause the chain to tighten in response to the changes in hydraulic pressure.

Abstract: A device and method for exposing light sensitive substrates to a concentrated light source. The device is suitable for curing substances such as photosensitive sensitive inks, adhesives, and photographic elements. Ultraviolet or visible light is emitted from an array of LED's, and then directed by an array of light guides to a light concentrator having a light input region along its length. The light is then concentrated and emitted from a light output region along the length of the light concentrator to a photosensitive target to be exposed.

Abstract: The invention relates to photopolymerizable compositions containing an oxonol dye, which compositions cure by exposure to ultraviolet and/or visible radiation and whose visible color is substantially reduced during exposure. More particularly, the invention pertains to photopolymerizable compositions comprising a pyridin-2,6-dione oxonol dye in an admixture of a polymerizable component and a photopolymerization initiator. Such compositions find use as adhesives, coatings, and the like. The disappearance of the visible color of the oxonol dye acts as an indicator of full cure of a photopolymerizable composition.