Compositions – Preservative agents – Anti-corrosion
Patent
1988-10-24
1990-02-20
Lee, Mary C.
Compositions
Preservative agents
Anti-corrosion
252380, 25238931, 25238932, 264 42, 264DIG19, C07F 702, C04B 3514, C09K 300
Patent
active
049024426
ABSTRACT:
A prereaction mixture which is useful in the preparation of porous silica compositions with uniform pore sizes. The porous silica composition comprises a substituted nitrogen-containing siliconate, a colloidal silica and a soluble alkali silicate. By the addition of the substituted nitrogen containing siliconate to either the colloidal silica or soluble silicate, or by combining all three ingredients, a stable solution results, thereby avoiding the premature polymerization of the colloidal silica upon the addition of the soluble silicate. The soluble alkali silicate can have a metal cation which is selected from the group consisting of potassium and sodium.
REFERENCES:
patent: 3678144 (1972-07-01), Shoup
patent: 3975248 (1976-08-01), Gorman
patent: 4094690 (1978-06-01), Morton
patent: 4112032 (1978-09-01), Blaszyk et al.
patent: 4344860 (1982-08-01), Plueddemann
patent: 4370255 (1983-01-01), Plueddemann
patent: 4548733 (1985-10-01), Vincent
Kilby Scalzo Catherine S.
Lee Mary C.
The Dow Chemical Company
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