发明名称 |
MOLDING FOR OPTICAL PURPOSES |
摘要 |
A novel, optically transparent, isotropic molding for optical purposes which is free of orientation birefringence consists of a mixture of polyphenylene ethers, vinylaromatic polymers and additives. The novel molding contains traces of novel diphenoquinone and/or diphenohydroquinone derivatives as additives and may also contain novel ammonium salts of sulfuric acid half esters of diphenohydroquinones as further additives. The novel molding has a yellowness index (YI) of from 40 to 90. It can be produced in a simple manner by injection molding processes. The novel molding in the form of a circular disk having a central hole is very useful as a dimensionally stable substrate of audio compact disks (CD), audiovisual compact disks (CDV), laser-optical computer disks and magneto-optical computer disks, and data media of this type which contain these novel dimensionally stable substrates have particularly advantageous performance characteristics.
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申请公布号 |
US5130356(A) |
申请公布日期 |
1992.07.14 |
申请号 |
US19900473453 |
申请日期 |
1990.02.01 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
FEUERHERD, KARL-HEINZ;HEDTMANN-REIN, CAROLA;LEBER, LUDGER |
分类号 |
B41M5/26;B29D11/00;C07C39/15;C07C50/08;C07C50/24;C07C50/30;C07C211/03;C07C215/78;C07C215/80;C07C225/20;C07C225/28;C07C305/24;C07D295/02;C07D295/027;C07D295/096;C07D295/112;C07D295/116;C08K5/08;C08K5/13;C08K5/42;C08L25/04;C08L25/06;C08L25/16;C08L71/00;C08L71/08;C08L71/12;G02B1/04;G11B7/24;G11B7/253;G11B11/10;G11B11/105 |
主分类号 |
B41M5/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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