Silicates

Details Silicates Silicates

C - Chemistry, Metallurgy

01

B

C01B 33/12 (2006.01) A61K 8/25 (2006.01) A61Q 11/00 (2006.01) C01B 33/193 (2006.01) A61K 7/16 (1990.01)

Patent

CA 2079243

R3120 Amorphous silicas suitable for use as abrasives in transparent toothpastes can be prepared by a precipitation route. These silicas are distinguished by having a BET surface area of 100 to 450 m2/g, a weight mean particle size of 5 to 15 microns, a plastics abrasion value of 16 to 26, a mean pore diameter from 2 to 12 nm, a transmission of at least 70% in the refractive index range from 1.430 to 1.443 and an oil absorption in the range from about 70 to about 130 cm3/g.

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