Composition and article for optical data storage devices
AssigneeGeneral Electric Company
InventorsRobert R. Gallucci, Frank A. Hoefflin, Steven F. Hubbard, Ramesh Hariharan, Irene Dris
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Abstract
Disclosed is an article for the optical storage of data having low birefringence prepared from a mixture of a polycarbonate and a cycloaliphatic polyester. The article may optionally have stabilization and mold release additives that retain transparency, color and processability.
Claims38
An article for optical storage of information comprising a blend of cycloaliphatic polyester and polycarbonate with in plane birefringence from −100 to +100 nm.
An article for optical storage of information comprising a blend of cycloaliphatic polyester and polycarbonate with vertical birefringence less than or equal to 300×10-6.
An article for optical storage of information comprising a blend of cycloaliphatic polyester and polycarbonate with stress optical coefficient (Cg) less than or equal to 70 Brewesters.
An article for optical storage of information comprising a blend of a cycloaliphatic polyester and a polycarbonate wherein said polycarbonate comprises a spiro biindane bisphenol.
A resin for molding optical quality articles comprising a blend of cycloaliphatic polyester and polycarbonate, wherein said resin blend has properties suitable for molding an optical quality article having in plane birefringence from −100 to +100 nm.
A resin for molding optical quality articles comprising a blend of cycloaliphatic polyester and polycarbonate, wherein said resin blend has properties suitable for molding an optical quality article having vertical birefringence less than or equal to 300×10-6.
A resin for molding optical quality articles comprising a blend of cycloaliphatic polyester and polycarbonate, wherein said resin blend has properties suitable for molding an optical quality article having a stress optical coefficient of less than or equal to 70 Brewsters.
A process for molding optical articles comprising the steps of forming a resin blend of a blend of cycloaliphatic polyester and polycarbonate and molding an optical quality article having in plane birefringence from −100 to +100 nm.
A process for molding optical articles comprising the steps of forming a resin blend of a blend of cycloaliphatic polyester and polycarbonate and molding an optical quality article having vertical birefringence less than or equal to 300×10-6.
A process for molding optical articles comprising the steps of forming a resin blend of a blend of cycloaliphatic polyester and polycarbonate and molding an optical quality article having a stress optical coefficient less than or equal to 70 Brewsters.
A process for reading stored information on a disc of the type having at least one optical quality layer comprising transmitting a signal to said optical quality layer to read said stored information, said storing means being operably associated with said optical quality layer, said optical quality layer comprising a blend of cycloaliphatic polyester and polycarbonate with in plane birefringence from −100 to +100 nm.
A process for reading stored information on a disc of the type having at least one optical quality layer comprising transmitting a signal to said optical quality layer to read said stored information, said storing means being operably associated with said optical quality layer, said optical quality layer comprising a blend of cycloaliphatic polyester and polycarbonate with vertical birefringence less than or equal to 300×10-6.
A process for reading stored information on a disc of the type having at least one optical quality layer comprising transmitting a signal to said optical quality layer to read said stored information, said storing means being operably associated with said optical quality layer, said optical quality layer comprising a blend of cycloaliphatic polyester and polycarbonate with a stress optical coefficient of less than or equal to 70 Brewsters.
Dependencies are inferred from the claim text.