US 5,658,553 AGranted

Dentifrice compositions

AssigneeThe Procter & Gamble Company

InventorDavid Earl Rice

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Oral compositions, such as oral gels and toothpastes, containing a novel abrasive.

Dependent claims

An amorphous silica abrasive composition, comprising:

a.) a precipitated silica, comprising particles wherein said particles have:
i.) a mean particle size of from about 5 to about 11 microns (s.d. <9);
ii.) an Einlehner hardness of from about 0.8 to about 2.5 for abrasive to brass screen and from about 5 to about 8 for abrasive to polyester screen;
iii.) an oil absorption of from about 95 ml/100 gm to about 135 ml/100 gm;
and
iv.) a radioactive dentin abrasion of from about 25 to about 90;
and
b.) a gel silica, comprising particles wherein said particles have:
i.) a mean particle size of from about 5 to about 11 microns (s.d. <9);
ii.) an Einlehner hardness of from about 3 to about 15 for abrasive to brass screen and from about 8 to about 20 for abrasive to polyester screen;
iii.) an oil absorption of from about 60 ml/100 gm to about 130 ml/100 gm;
and
iv) a radioactive dentin abrasion of from about 80 to about 200
wherein at least about 70% of all of said particles have a diameter of below about 25 microns and wherein the pellide cleaning ratio is from about 90 to about 135 and the radioactive dentin abrasion is from about 60 to about 100 with a pellide cleaning ratio/radioactive dentin abrasion ratio of from about 1.20 to about 1.60 and wherein the ratio of precipitated silica to gel silica is from about 90:10 to about 60:40, respectively.

11 more elements

A dentifrice composition, comprising:

A). from about 0.1% to about 99% of an amorphous silica abrasive composition, comprising:
a.) a precipitated silica, comprising particles wherein said particles have:
i.) a mean particle size of from about 5 to about 11 microns (s.d. <9);
ii.) an Einlehner hardness of from about 0.8 to about 2.5 for abrasive to brass screen and from about 5 to about 8 for abrasive to polyester screen;
iii.) an oil absorption of from about 95 ml/100 gm to about 135 ml/100 gm;
and
iv.) a radioactive dentin abrasion of from about 25 to about 90;
and
b.) a gel silica, comprising particles wherein said particles have:
i.) a mean particle size of from about 5 to about 11 microns (s.d. <9);
ii.) an Einlehner hardness of from about 3 to about 15 for abrasive to brass screen and from about 8 to about 20 for abrasive to polyester screen;
iii.) an oil absorption of from about 130 ml/100 gm to about 60 ml/100 gm;
and
iv) a radioactive dentin abrasion of from about 80 to 200
wherein at least about 70% of said particles have a diameter of below about 25 microns and wherein the pellide cleaning ratio is from about 90 to about 135 and the radioactive dentin abrasion is from about 60 to about 100 with a pellicle cleaning ratio/radioactive dentin abrasion ratio of from about 1.20 to about 1.60 and wherein the ratio of precipitated silica to gel silica is from about 90:10 to about 60:40, respectively;
and
B). from about 0.1% to about 99% of an orally-acceptable dentifrice carrier.

14 more elements

Dependencies are inferred from the claim text.

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