Catalyst for sol-gel method using metal alkoxide and sol-gel met

Details Catalyst for sol-gel method using metal alkoxide and sol-gel met Catalyst for sol-gel method using metal alkoxide and sol-gel met

1988-02-22

1990-06-26

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65901, C03C 100

Patent

active

049372084

ABSTRACT:
A catalyst for sol-gel methods using metal alkoxide comprises a mineral acid or its anhydride and an organic base, said organic base being a tertiary amine that is substantially insoluble in water and soluble in organic solvents. A sol-gel method using the above-mentioned catalyst comprises a step of hydrolyzing a metal alkoxide with a subsequent polycondensation of hydrolyzate thereof using the catalyst, resulting in a polymer containing gel.

REFERENCES:
patent: 4278632 (1981-07-01), Yoldas
patent: 4681615 (1987-07-01), Toki et al.
Chemical Abstracts, vol. 108, No. 12, 21st Mar. 1988, p. 349, No. 99925p, Columbus, Ohio, U.S.; & JP-A-62 265 129 (Hitachi Chemical Co., Ltd.), 18-11-1987, *Abstract*.
Journal of the American Ceramic Society, vol. 69, No. 4, Apr. 1986, pp. C-72-C-74, Columbus, Ohio, U.S.; A. Makishima et al.: "Preparation of Amorphous Silicas Doped with Organic Molecules by the Sol-Gel Process", *pp. C-72, C-73*.
Journal of Non-Crystalline Solids, vol. 100, Mar. 1988, pp. 31-49, Elsevier Science Publishers B.V., North-Holland, Amsterdam, NL; C. J. Brinker: "Hydrolysis and Condensation of Silicates: Effects on Structure", *p. 33*.

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