发明名称 |
GLASS FOR PRESS MOLDING |
摘要 |
The present invention provides a novel glass material that allows the production of a glass product having both excellent chemical durability and high precision by a press molding method. Specifically, the present invention provides a glass for press molding, comprising 38% to 45% by weight of SiO 2 , 18% to 27% by weight of B 2 O 3 , 16% to 25% by weight of Al 2 O 3 , 2% to 12% by weight of ZnO, no more than 3% by weight of MgO, no more than 3% by weight of CaO, no more than 3% by weight of BaO, 13% to 18% by weight of Li 2 O, no more than 3% by weight of K 2 O, and no more than 2% by weight of Na 2 O; wherein the glass has a deformation temperature of 520°C or lower; and the glass has a water resistance of grade 2 or higher as measured according to the Japanese Optical Glass Industrial Standard method for measuring the chemical durability of an optical glass.
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申请公布号 |
EP1702895(A1) |
申请公布日期 |
2006.09.20 |
申请号 |
EP20040772971 |
申请日期 |
2004.09.07 |
申请人 |
ISUZU GLASS CO., LTD.;NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCEAND TECHNOLOGY |
发明人 |
HOSOKAWA, TAKAHARU;KIKUCHI, NAOKI;SUETSUGU, TATSUYA;KIMURA, KAZUHISA;HASEGAWA, TADASHI;EINISHI, TOSHIHIKO;TARUMI, TAKASHI;KADONO, KOHEI |
分类号 |
C03C3/093;C03C3/066;G02B1/00;G02B3/00;G02B3/04 |
主分类号 |
C03C3/093 |
代理机构 |
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地址 |
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