Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1996-07-31
1999-06-15
Ceperley, Mary E.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428447, 428649DE, B32B 2708, B32B 2728, G11B 572
Patent
active
059120614
ABSTRACT:
A high quality magneto-optical disk which has the protective coating being excellent in the lubricity, the property of sliding and a long-term reliability includes a UV-ray resin composition comprising photo polymerizable prepolymer, photo polymerization initiator and organic compound having a side chain of fluoroalkyl group or unsaturated aliphatic alkyl group in the end of each molecule. The UV-ray setting resin comprising photo polymerization prepolymer at 30-80 parts by weight; photo polymerization initiator at 10-40 parts by weight; and organic polysiloxane at 0.1-10 parts by weight per 100 parts by weight of (meth-)acrylic ester is applied to approximately 10 .mu.m on the reflection layer 14 by the spincoat method and irradiating the UV-ray (illuminance: 600 mW/cm.sup.2, quantity of light: 800 mJ/cm.sup.2) at room temperature, thus forming the protective coating.
REFERENCES:
patent: 5534322 (1996-07-01), Ueyama et al.
Abstract of Jpn. Kodai Tokkyo Koho JP 04036353 (Fujioka et al.), Feb. 1992.
Abstract of Jpn. Kodai Tokkyo Koho JP 08333524 (Kosakai et al.), Dec. 1996.
Abstract of Jpn. Kodai Tokkyo Koho JP 09100326 (Nishimura et al.), Apr. 1997.
Nishikiori Keiji
Uchida Kiyoshi
Ceperley Mary E.
Matsushita Electric - Industrial Co., Ltd.
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