Freezeproofed silica sol for manufacturing phosphate-based...

Details Freezeproofed silica sol for manufacturing phosphate-based... Freezeproofed silica sol for manufacturing phosphate-based...

A - Human Necessities

61

K

6/36

A61K 6/06 (2006.01) C01B 33/148 (2006.01)

Patent

CA 1327425

ABSTRACT OF THE DISCLOSURE A freezeproofed aqueous silica sol, containing 25 to 50 wt.% SiO2 and 2 to 10 wt.% urea and/or urea derivatives having the general formula Image in which X and Y can be an NH2 or NHR group, and R is an alkyl radical having 1 to 4 carbon atoms; and the application of this sol in phosphate-based embedding masses used in dentistry.

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