HIGH DATA DENSITY OPTICAL MEDIA DISCS
    2.
    发明授权
    HIGH DATA DENSITY OPTICAL MEDIA DISCS 有权
    与高密度数据OPTSCHE传媒板块

    公开(公告)号:EP1212753B1

    公开(公告)日:2006-10-25

    申请号:EP00952373.9

    申请日:2000-08-01

    IPC分类号: G11B7/24

    摘要: A high data density pre-recorded optical media disc having a data density of at least 7.5 Gigabytes per disc layer or 0.17 Gigabytes per square cm (Gb/cm ) per layer and a degree or replication such that the average pit depth equals 1/4 to 1/8 times (the wavelength of the laser divided by the refractive index of the disc); or a rewritable optical media disc having a data density of at least 0.05 Gb/cm , wherein at least 75 percent replication is achieved as measured by a combination of groove height and the left and right sidewall angles, and wherein the pre-recorded or rewritable disc has a retardation of less than 25 nm per 0.6 mm substrate thickness, and a water absorbance of less than 0.5 percent as measured according to ASTM D570.

    HYDROGENATED BLOCK COPOLYMERS
    10.
    发明授权
    HYDROGENATED BLOCK COPOLYMERS 有权
    氢化的嵌段共聚物

    公开(公告)号:EP1169358B1

    公开(公告)日:2004-02-11

    申请号:EP00910261.7

    申请日:2000-02-22

    IPC分类号: C08F8/04

    CPC分类号: C08F297/04 C08F8/04

    摘要: The present invention is a hydrogenated block copolymer comprising at least two distinct blocks of hydrogenated vinyl aromatic polymer, and at least one block of hydrogenated conjugated diene polymer, characterized by: a) a total number average molecular weight (Mnt) of from 30,000 to 120,000, wherein each hydrogenated vinyl aromatic polymer block (A) has a Mna of from 5,000 to 50,000 and the hydrogenated conjugated diene polymer block (B) has a Mnb of from 4,000 to 110,000; and b) a hydrogenation level such that each hydrogenated vinyl aromatic polymer block has a hydrogenation level of greater than 90 percent and the hydrogenated conjugated diene polymer block has a hydrogenation level of greater than 95 percent.