Extension of gum thickener with silicon dioxide and toothpaste containing the same

Claim 1

A dentifrice composition comprising the following essential components: ______________________________________ COMPONENT AMOUNT - WT. % ______________________________________ Abrasive 10-60 Humectant 15-40 Gum Thickener 0.4-0.9 Silica Thickener 1-20 Water 35-50 ______________________________________ wherein said silica thickener has a primary particle size of less than 40 millimicrons, a void volume of from 3.0 to 6.0 cc Hg/g, an oil absorption of 150-250 cc oil/100 g of silica, a surface area of from 100-400 m 2 /g, and a wet cake moisture in excess of 85%; and wherein said abrasive and said silica thickener are premixed prior to addition thereof to the other components of said dentifrice composition, said addition being at the conclusion of the mixing procedure for said other components.

Claim 8

A method of using a silica thickener to extend the functional performance of a gum thickener in a dentifrice composition comprising about 10-60 weight percent of an abrasive, about 15-40 weight percent of a humectant, about 0.4 to 0.9 weight percent of a gum thickener, and about 35-50 weight percent of water, said method comprising (a) premixing about 1-20 weight percent of a high structure silica thickener with said abrasive, and (b) adding the resulting mixture to the remaining components of said dentifrice composition at the conclusion of the mixing procedure for said remaining components; wherein said thickener has a primary particle size of less than 40 millimicrons; a void volume of from 3.0 to 6.0 cc Hg/g; an oil absorption of 150 to 250 cc oil/100 g of silica; a surface area of from 100 to 400 m 2 /g; and a wet cake moisture in excess of 85%.

Claim 9

A method of using a silica thickener to extend the functional performance of a gum thickener in a dentifrice composition comprising about 10-60 weight percent of an abrasive, about 15-40 weight percent of a humectant, about 0.4 to 0.9 weight percent of a gum thickener, and about 35-50 weight percent of water, said method comprising (a) premixing about 1-20 weight percent of a high structure silica thickener with said abrasive, and (b) adding the resulting mixture to the remaining components of said dentifrice composition at the conclusion of the mixing procedure for said remaining components; wherein said thickener has a primary particle size of less than 40 millimicrons; a void volume of from 3.0 to 6.0 cc Hg/g; an oil absorption of 150 to 250 cc oil/100 g of silica; a surface area of from 100 to 400 m 2 /g; and a wet cake moisture in excess of 85%.