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US 2014/0271900 A1Published application
High Cleaning Silica with Low Abrasion and Method for Making Same
OwnerFitzgerald A. Sinclairinventor
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Abstract
Silica materials having high cleaning and low abrasion properties are described, together with methods of making such materials and dentifrice compositions comprising the silica materials.
Claims20
A silica material comprising at least three of:
- a. a BET surface area of less than about 90 m2/g;
- b. an oil absorption number of at least about 80 cc/100 g;
- c. a loss on ignition of less than about 4 wt. %;
- and
- d. a PCR:RDA ratio of at least about 0.8 in a dentifrice comprising 11 wt. % glycerine (99.7%), 42.107 wt. % sorbitol (70%), 20 wt. % deionized water, 3 wt. % polyethylene glycol (PEG-12), 0.6 wt. % sodium carboxymethylcellulose, 0.5 wt. % tetrasodium pyrophosphate, 0.2 wt. % sodium saccharin, 0.243 wt. % sodium fluoride, 0.5 wt. % titanium dioxide, 1.2 wt. % sodium lauryl sulfate, 0.65 wt. % flavoring, and 20 wt. % of the silica material.
2 more elements
A silica material comprising:
- a. a BET surface area of less than about 60 m2/g;
- b. an oil absorption number of at least about 120 cc/100 g;
- c. a loss on ignition of less than about 5 wt. %;
- and
- d. a PCR of at least about 80 and a PCR:RDA ratio of at least about 1.25 in a dentifrice comprising 11 wt. % glycerine (99.7%), 42.107 wt. % sorbitol (70%), 20 wt. % deionized water, 3 wt. % polyethylene glycol (PEG-12), 0.6 wt. % sodium carboxymethylcellulose, 0.5 wt. % tetrasodium pyrophosphate, 0.2 wt. % sodium saccharin, 0.243 wt. % sodium fluoride, 0.5 wt. % titanium dioxide, 1.2 wt. % sodium lauryl sulfate, 0.65 wt. % flavoring, and 20 wt. % of the silica material.
2 more elements
A method for preparing a silica material, the method comprising:
- a. contacting a silicate compound or a solution thereof with an acid in the presence of a salt or solution thereof, so as to form a precursor material, and then
- b. subjecting the precursor material to a hydrothermal process.
Dependencies are inferred from the claim text.