Polishing composition for glass substrate

• Main Authors: SHIROTA MAMI, NISHIMOTO KAZUHIKO, YONEDA YASUHIRO
• Format: Patent
• Language: English
• Published: 28.06.2007
• Subjects: ADHESIVES; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DECORATIVE ARTS; DYES; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MOSAICS; NATURAL RESINS; PAINTS; PAPERHANGING; PERFORMING OPERATIONS; POLISHES; PRODUCING DECORATIVE EFFECTS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TARSIA WORK; TRANSPORTING

The present invention provides a polishing composition for a glass substrate having a pH of from 0.5 to 5, containing a silica of which primary particles have an average particle size of from 5 to 50 nm and an acrylic acid/sulfonic acid copolymer having a weight-average molecular weight of from 1,000 to 5,000; and a method for manufacturing a glass substrate using the polishing composition. The polishing composition for a glass substrate can be suitably used, for example, in the manufacture of glass hard disks, aluminosilicate glass for reinforced glass substrates, glass ceramic substrates (crystallized glass substrates), synthetic quartz glass substrates (photomask substrates), and the like.