POLYCARBONATE AND OPTICAL MATERIAL

• Main Authors: ITO, MITSUNORI, KUZE, SHIGEKI
• Format: Patent
• Language: English; French; Japanese
• Published: 30.09.1999
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A polycarbonate which is obtained by preparing a polycarbonate prepolymer through prepolymerization and polymerizing the prepolymer in a solid state, swollen solid state, or molten thin-film state through transesterification, and has a residual monomer content lower than 100 ppm, in particular, a di...