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 polymerizable acrylate or epoxy composition includes a dye comprised of a conjugated system containing a chromophore that is subject to effective decoupling, by a reactive alkylating species generated by the polymerization initiator, to produce a permanent loss of color and thereby to indicate that curing has occurred.

Abstract: The present invention provides an improved method and apparatus for curing coatings on optical fibers, without creating additional heat and compromising the manufacturing speed of optical fibers. The present invention uses at least one ultrasonic transducer coupled to a component of the optical fiber draw tower, such as the coating die, curing stage device or sheath, to emit ultrasound to the coating of the fiber. The use of ultrasound with current coating cure techniques, such as UV radiation curing, aids in accelerating the coating cure process through the effects of sonolysis, allowing an increase in current manufacturing speeds of optical fibers.

Abstract: A radiation-curable coating composition containing an oligomeric system containing (a) individual oligomers that each contain an oligomeric backbone having chemically tethered thereto one or more radiation-curable components and (b) individual oligomers that each contain an oligomeric backbone having chemically tethered thereto one or more formulation components of a radiation-curable coating composition, wherein each individual oligomer of the group of individual oligomers (a) may be the same as or different from each individual oligomer of the group of individual oligomers (b), and each formulation component is a photoinitiator group, an adhesion promoter group, or a fullerene.

Abstract: A radiation-curable polyurethane is obtained from the reaction of a low free diisocyanate polyurethane prepolymer and an acrylic monomer.

Abstract: A UV-curable coating composition including an acrylate oligomer and a vinyl acrylate compound, the latter of which can act as both a reactive diluent and an adhesion promoter. The vinyl acrylate compounds have good miscibility and low viscosity, and impart to the cured primary coating a high adhesion to glass. With the use of a free radical photoinitiator, the vinyl acrylate compound increases the speed of cure of the uncured primary coating.

Abstract: A UV-curable coating composition including an acrylate oligomer and a vinyl acrylate compound, the latter of which can act as both a reactive diluent and an adhesion promoter. The vinyl acrylate compounds have good miscibility and low viscosity, and impart to the cured primary coating a high adhesion to glass. With the use of a free radical photoinitiator, the vinyl acrylate compound increases the speed of cure of the uncured primary coating.

Abstract: The present invention is a method of making an optical fiber, and the fiber itself, where the primary and secondary coatings are cured simultaneously with Uv radiation. The method of making the optical fiber comprises applying the primary coating on a glass fiber (optical fiber) where the primary coating has a first photoinitiator which allows the primary coating to be cured by a first wavelength range of UV light, applying the secondary coating over the primary coating where the secondary coating contains a second photoinitiator whose UV reaction spectra is substantially different from the first photoinitiator in the primary coating and which allows the secondary coating to be cured through exposure to UV radiation in a second wavelength range of UV light, and finally by exposing the optical fiber, having the two coatings, to a UV light source which contains wavelengths in both wavelength ranges of the first and second photoinitiators, so that the primary and secondary coatings cure simultaneously.