申请人:NIPPON ZEON CO., LTD.
公开号:EP0405843A2
公开(公告)日:1991-01-02
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 a molecular distribution (Mw/Mn) of not more than 2.5 and having a volatile content of not more than 0.3% by weight.
本发明公开了一种适用于光学材料的成型材料以及由该成型材料形成的光学记录介质。该模塑材料由降冰片烯类单体开环聚合形成的聚合物的氢化产物组成,氢化产物的数均分子量(Mn)为 20,000 至 50,000 ,重均分子量(Mw)为 40,000 至 80,000 ,分子分布(Mw/Mn)不超过 2.5,挥发物含量不超过 0.3%(按重量计)。