Optical disk substrate

Details Optical disk substrate Optical disk substrate

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) B32B 3/00 (2006.01) G11B 7/253 (2006.01)

Patent

CA 1317675

ABSTRACT OF THE DISCLOSURE An optical disk substrate made of a non-crystalline thermoplastic resin comprising from 80 to 100% by weight of a vinyl cyclohexane polymer (A) containing at least 80% by weight of a vinyl cyclohexane component in the molecular chain and from 0 to 20% by weight of a vinyl aromatic polymer (B) and having a light transmittance of at least 85%, a water absorbance of at most 0.1% by weight and a double refraction of at most 50 nm.

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