摘要:
Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4′-biphenol have been prepared by the melt reaction of one or more of the aforementioned dihydroxy aromatic compounds with an ester-substituted diaryl carbonate such as bis-methyl salicyl carbonate. Low, or in many instances undetectable, levels of Fries rearrangement products are found in the product polycarbonates obtained as the combined result of a highly effective catalyst system which suppresses the Fries reaction and the use of lower melt polymerization temperatures relative to temperatures required for the analogous polymerization reactions using diphenyl carbonate.
摘要:
A limited play optical storage medium for data is described which comprises a first substrate, a reflective layer, a data layer disposed between said substrate and said reflective layer; a reactive layer comprising at least one carrier, and at least one reactive material, and an optically transparent second substrate comprised of a polymethacrylate copolymer or blend comprising a polymethacrylate copolymer or homopolymer. The second substrate is disposed between the reactive layer and a laser incident surface and is tailored to provide an oxygen permeability in a range between about 0.1 Barrers and about 1.35 Barrers at 25° C.
摘要:
The present invention provides a reactive adhesive formulation for use in a limited play data storage medium, the reactive adhesive formulation including at least one adhesive material, at least one reactive material disposed within the at least one adhesive material and at least one photo-bleaching retarder material disposed within the at least one adhesive material. The at least one photo-bleaching retarder material includes resorcinol, 4-hexylresorcinol and/or polyhydroxystyrene.
摘要:
The present invention provides a formulation for a reactive dye layer for a limited-play optical storage medium, the reactive formulation including at least one carrier material or curable acrylate monomer, at least one reactive material disposed within the carrier material or acrylate monomer, and at least one photo-bleaching retarder material disposed within the at least one adhesive material. The at least one photo-bleaching retarder material includes at least one polymeric polyhydroxy compound selected from the group consisting of polyhydroxystyrenes, cellulose, and functionalized cellulose derivatives.
摘要:
The invention relates generally to optical storage devices, such as DVDs and CDs, on which compositions containing dyes are disposed so as to facilitate limited or selective use of at least a portion of the content of the optical storage devices. The invention also relates to methods of making limited-use content optical storage devices.
摘要:
The present invention provides a digital content kiosk system operable for delivering selected digital content to a user. The digital content kiosk system of the present invention includes a limited-play recordable data storage medium configured to receive selected digital content and a data storage media recording device operable for recording the selected digital content on the limited-play recordable data storage medium at the request of a user. The limited-play recordable data storage medium of the present invention includes a reflective layer, a recording layer disposed directly or indirectly adjacent to the reflective layer, and at least one of a reactive layer and a reactive bonding adhesive layer disposed between the data storage media recording device and at least one of the reflective layer and the recording layer.
摘要:
An optical article for being transformed from a pre-activated state of functionality to an activated state of functionality is provided. The optical article includes a thermally responsive optical-state change material, disposed in or proximate to the optical article and being responsive to an external stimulus. The optical-state change material alters irreversibly, the optical article from the pre-activated state of functionality to the activated state of functionality upon interaction with the external stimulus.
摘要:
An optical article that can transform from a pre-activated state of functionality to an activated state of functionality is provided. The optical article includes a radio frequency circuitry coupled to the optical article for interacting with a signal, wherein said signal comprises a thermal signal, an electrical signal, or both, and a convertible material in operative association with the radio frequency circuitry for altering the functionality of the optical article from the pre-activated state to the activated state upon interaction with the thermal energy.
摘要:
One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second optical signal, wherein the second laser has a second wavelength that is different from the first wavelength, and determining if the optical article is authentic by comparing the first optical signal and the second optical signal.