Optical disk substrate

Details Optical disk substrate Optical disk substrate

1988-02-11

1989-03-14

Thomas, Alexander S.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

430270, 430945, 369288, G11B 724

Patent

active

048123455

ABSTRACT:
There is disclosed herein an optical disk substrate comprising a copolymer produced by polymerizing 50 to 65% by weight of methyl methacrylate (a) units, 20 to 35% by weight of tricyclo[5.2.1.0.sup.2.6 ]deca-8-yl methacrylate (b) units, 5 to 25% by weight of cyclohexyl methacrylate (c) units and 1 to 5% by weight of acrylic ester (d) units.

REFERENCES:
patent: 4591626 (1986-05-01), Kawai et al.

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