Molding material

Details Molding material Molding material

C - Chemistry, Metallurgy

08

L

42/2, 400/9407

C08L 45/00 (2006.01) B29D 11/00 (2006.01) C08G 61/08 (2006.01) G11B 7/24 (2006.01) G11B 7/253 (2006.01) G11B 7/26 (2006.01)

Patent

CA 2019212

A molding material suitable as an optical material, and an optical recording medium formed of the molding material are disclosed. The molding material comprises a hydrogenated product of a polymer formed by ring-opening polymerization of a norbornene-type monomer, the hydrogenated product having a number average molecular weight (Mn) of 20,000 to 50,000, a weight average molecular weight (Mw) of 40,000 to 80,000 and an Mw/Mn ratio of not more than 2.5, and having a volatile content of not more than 0.3% by weight.

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