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AssigneesOptical Technologies, Inc., Mitsubishi Chemical Corporation
InventorsLester E. Cornelius, Toshinori Torii
Estimating the term…
The application discloses a two-layered coating system using an ultraviolet absorber in its inner layer (called the blocking layer), furthest away from the source of ultraviolet exposure, with a fluorescent material that reflects ultraviolet radiation back as blue light. The ultraviolet absorber in the inner layer is used in sufficient concentration to have an ultraviolet cutoff, which can be extended with the fluorescent material. The ultraviolet block material of the present invention has transmittance of the light within a range of wavelength of 300-380 nm of 10% or less, preferably transmittance of the light within a range of wavelength of 300-390 nm of 10% or less, and, particularly preferably, transmittance of the light within a range of 300-400 nm of 10% or less, while it has a transmittance of the light within a range of 420-800 nm wavelength of 90% or more, or, preferably, 95% or more.
An ultraviolet block material, characterized in that, a transmittance for the light within a wavelength range of 300-380 nm is 10% or less and a transmittance for the light within a wavelength range of 420-800 nm is 90% or more.
An ultraviolet block material having a substrate and an ultraviolet block layer provided on the substrate in a releasable manner, the ultraviolet block material which is characterized in that, in the said ultraviolet block layer, the transmittance of the light within a range of 300-380 nm wavelength is 10% or less and the transmittance of the light within a range of 420-800 nm wavelength is 90% or more.
An ultraviolet absorbing coating composition comprising a resin system selected from the group consisting of phenoxy resins and acrylic resins, approximately 20% by volume of resin solids, ultraviolet filter materials selected from the group consisting of benzotriazoles and benzophenones, 2.5% to 8.5% of volume of resin solids;
In the manufacture of a light emitting device including a glass envelope, the step of coating a surface of said envelope with an ultraviolet light-absorbing coating including a resin selected from the group consisting of phenoxy resins and acrylic resins, and an ultraviolet filter material selected from the group consisting of benzotriazoles and benzophenones.
An ultraviolet radiation-absorbing coating composition comprising a resin system selected from the group consisting of phenoxy resins, acrylic resins, and melamine resins ranging from 10% to 40% of resin solids;
An ultraviolet radiation absorbing coating composition for use with a high temperature light source comprising:
An ultraviolet radiation absorbing coating system comprising a first synthetic resinous layer having an ultraviolet radiation absorber with an ultraviolet cutoff lower than about 385 nanometers, and a fluorescent material which reflects ultraviolet radiation of wavelength above 385 nanometers;
Dependencies are inferred from the claim text.