Substrat für optische Platte, optische Platte und aromatischer Polycarbonatharz

An optical disk substrate formed of an aromatic polycarbonate resin from an aromatic dihydroxy component which contains (a) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (component a) and (b) 2,2-bis (3-methyl-4-hydroxyphenyl) propane (component b), in which the total amount of the components...

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Bibliographische Detailangaben
Hauptverfasser:	TOKUDA, TOSHIMASA, HAYASHI, KUNIYUKI, HORIE, TATSUMI
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	An optical disk substrate formed of an aromatic polycarbonate resin from an aromatic dihydroxy component which contains (a) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (component a) and (b) 2,2-bis (3-methyl-4-hydroxyphenyl) propane (component b), in which the total amount of the components a and b is at least 80 mol% based on the total aromatic dihydroxy component amount and the molar ratio of the component a : component b is 20 : 80 to 80 to 80 : 20, the resin having particular values for specific viscosity, water absorption percentage, oligomer content and undissolved particles. The substrate is especially useful in the formation of video disks.