Patent ID: 7728095
Filing Date: 2010-06-01
Classification: C08G,C08J,C08L,C09D

Abstract:
1. A process for producing an organic-inorganic hybrid glassy material, comprising the sequential steps of: (a) concentrating a starting sol of an organic-inorganic hybrid glassy material, thereby yielding a precursor material having meltability; (b) melting the precursor material; (c) subjecting a product of the step (b) to a heating treatment under reduced pressure; and (d) subjecting a product of the step (c) to a high-temperature heat treatment at 300° C. or higher; wherein: step (d) is not conducted under reduced pressure and is carried out at a temperature higher than that of step (c), the precursor material of step (a) comprises a D unit in which, of the four bonds which can be made to a silicon atom, excluding two bonds to organic substituents, one or both of the remaining bonds is/are bonded to another silicon atom through an oxygen atom; and the process provides the organic-inorganic hybrid glassy material with a numeral ratio of (D a T a T a T a D a D