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US 2019/0159982 A1Published application
Whitening Compositions and Methods for Increasing Stability of the Same
AssigneeColgate-Palmolive Company
InventorsLin FEI, Prakasarao MANDADI, Suman CHOPRA
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Abstract
Oral care compositions and methods for whitening and preventing stains on teeth are provided. The oral care composition may include an orally acceptable vehicle, a peroxide whitening agent, and an abrasive system. The orally acceptable vehicle may include a block copolymer of ethylene oxide and propylene oxide, and the abrasive system may include at least one insoluble phosphate salt.
Claims18
An oral care composition, comprising:
- an orally acceptable vehicle comprising
- a block copolymer of ethylene oxide and propylene oxide having an average molecular weight greater than or equal to about 1,000 Da and less than or equal to about 3,000 Da;
- a peroxide whitening agent;
- and
- an abrasive system comprising at least one insoluble phosphate salt;
- wherein the block copolymer is present in an amount from 20 weight % to 40 weight % based on a total weight of the oral care composition.
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A method for increasing peroxide stability in an oral care composition, the method comprising:
- replacing at least a portion of the propylene glycol and glycerin with a block copolymers of ethylene oxide (EO) and propylene oxide (PO) represented by formula (ethylene oxide)11-(propylene oxide)16-(ethylene oxide)11;
- and
- combining the orally acceptable vehicle with an abrasive system comprising a combination of sodium metaphosphate and calcium pyrophosphate.
Dependencies are inferred from the claim text.