Title:
PRODUCTION OF SILICA PRODUCT
Document Type and Number:
Japanese Patent JP3022509
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a new sol-gel process using only very small amounts of a stabilizer such as TMAH(tetramethylammonium hydroxide) and a gelation agent such as methyl formate.
SOLUTION: In this production, by using a single stabilization/gelation agent which is capable of initially, stabilizing or assisting in stabilizing a liquid dispersion and then, being converted in situ into a gelation agent for inducing gelation of the liquid dispersion, the respective required amounts of a conventional stabilizer and a conventional gelation agent, both of which are required for bringing about both the stabilization effect and the gelation effect, can be reduced. Accordingly, this sol-gel process is superior to a conventional solgel process. The initial stabilization effect of the stabilization/gelation agent enables a remarkable reduction in required amount of an undesirable stabilizer such as TMAH. Further, since the stabilization/gelation agent itself is converted into a substance capable of contributing to gelation, only a very small amount of a conventional gelation agent such as methyl formate is required.
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Inventors:
You-Lan Chen
Sanjay Patel
Jorge Louis Valdes
Sanjay Patel
Jorge Louis Valdes
Application Number:
JP27077998A
Publication Date:
March 21, 2000
Filing Date:
September 25, 1998
Export Citation:
Assignee:
Lucent Technologies, Inc.
International Classes:
C03B8/02; C03B20/00; C03B37/012; C03C1/00; (IPC1-7): C03B8/02; C03B20/00; C03B37/012; C03B37/016
Attorney, Agent or Firm:
Hirofumi Mitsumata