RESIN COMPOSITION FOR SPACERS OF INFORMATION RECORDING DISC

A resin composition for spacers of an information recording disc which comprises:(A) a random copolymer of ethylene and at least one cycloolefin having an intrinsic viscosity [ eta ] of from 0.05 to 10 dl/g, as measured in decalin at a temperature of 135 DEG C., and (B) from 0.01 to 5 parts by weigh...

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Bibliographische Detailangaben
Hauptverfasser:	MINODA TAKESI, KIMURA TOSIO, TODO AKIRA, GURISOO MASAYOSI
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	A resin composition for spacers of an information recording disc which comprises:(A) a random copolymer of ethylene and at least one cycloolefin having an intrinsic viscosity [ eta ] of from 0.05 to 10 dl/g, as measured in decalin at a temperature of 135 DEG C., and (B) from 0.01 to 5 parts by weight, based on 100 parts by weight, of said copolymer A, of an inorganic particles such as titania and silica having a particle size of not more than 300 mu m. Spacers made of the composition described herein can be welded to disc substrates within a shortened period of ultrasonic vibration to produce an information recording disc having a reduced warp angle.