Title:
PRODUCTION OF HYBRID SILICA GEL
Document Type and Number:
Japanese Patent JPH05156016
Kind Code:
A
Abstract:
PURPOSE:To provide a method for producing a hybrid silica gel greatly enhanced in its durability as a photochromic material. CONSTITUTION:A tetraalkoxysilane of formula I (R<1> is alkyl) is reacted with a photochromic compound having an alkoxy silyl group, and the produced silica gel is treated with an organoalkoxysilane of formula II (R<2> is alkyl. alkenyl, etc.; R<3> is alkyl; (n) is 1, 2) (e.g. phenyltrimethoxysilane).
Inventors:
MATSUDA REIKO
YAMAGUCHI MASAO
OKAMOTO HIDENORI
YAMAGUCHI MASAO
OKAMOTO HIDENORI
Application Number:
JP32322691A
Publication Date:
June 22, 1993
Filing Date:
December 06, 1991
Export Citation:
Assignee:
TOKUYAMA SODA KK
International Classes:
C01B33/152; C03B8/02; C03B20/00; C03C3/06; C03C4/06; C08G77/00; C08G77/06; C08G77/26; C08G77/28; C09K9/02; (IPC1-7): C01B33/152; C03B8/02; C03C3/06; C03C4/06; C08G77/00; C08G77/26; C09K9/02
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