Toothpaste comprising calcium based abrasives

Patent metadata

Field	Value
Publication number	US-9308158-B2
Application number	US-201214128865-A
Country	US
Kind code	B2
Filing date	Jul 4, 2012
Priority date	Jul 12, 2011
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

It has been found that toothpastes containing balance amounts of calcium based abrasive, copolymer of vinylmethylether and maleic acid and clay have significantly better stability even at elevated temperature. It has also been determined that the selected combination allows for complete removal of or at least a significant reduction in thickening silica, with almost no adverse effect on rheology. Disclosed is a toothpaste composition comprising: (i) a calcium based abrasive; (ii) a copolymer of vinylmethyl ether and maleic acid; and (iii) a clay, wherein ratio of the calcium based abrasive to said copolymer of vinylmethyl ether and maleic acid is at least 1:0075 and ratio of said calcium based abrasive to said clay is at least 1:0.02.

First claim

The invention claimed is:

1. A toothpaste composition comprising:
(i) 30 to 60 wt % a Calcium based abrasive, wherein the calcium based abrasive is chalk;
(ii) a copolymer of vinylmethyl ether and maleic acid; and,
(iii) a clay,
wherein a ratio of said Calcium based abrasive to said copolymer of vinyl methyl ether and maleic anhydride is at least 1:0.0075 and a ratio of said Calcium based abrasive to said clay is at least 1:0.02.

2. The toothpaste composition as claimed in claim 1 , wherein said clay is a smectite clay.

3. The toothpaste composition as claimed in claim 1 , comprising 0.1 to 2 wt % copolymer of vinylmethyl ether and maleic acid.

4. The toothpaste composition as claimed in claim 1 , comprising 0.2 to 3 wt % clay.

5. The toothpaste composition as claimed in claim 1 , further comprising 0.1 to 2 wt % gum.

6. The toothpaste composition as claimed in claim 1 , wherein viscosity of said composition is 80,000 to 500,000 cps.

7. A cosmetic method of promoting oral hygiene comprising a step of applying to the teeth an effective amount of a toothpaste composition as claimed in claim 1 .

8. The toothpaste composition as claimed in claim 1 , further comprising up to 2 wt % thickening silica.

Assignees

• Chandrasekaran Sembian
• Iyer Meenakshi
• Conopco Inc

Inventors

• Chandrasekaran Sembian
• Iyer Meenakshi

Classifications

• A61K8/26 Primary

  Aluminium; Compounds thereof · CPC title

• A61Q11/00

  Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses · CPC title

• A61K8/8164

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers, e.g. poly (methyl vinyl ether-co-maleic anhydride) · CPC title

• A61K8/19

  containing inorganic ingredients · CPC title

• A61K8/8129 Primary

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers or esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers, e.g. polyvinylmethylether · CPC title