Acid Blue 230 for Use in Oral Care Compositions Containing Polymeric Dyes
S.N. Bechelor, et al. CN102548531B, 2010.
Oral care compositions containing dye polymers have been developed for changing tooth color. Suitable colorants among these include anthraquinone-based polymer dyes having a poly(methyl vinyl ether)-maleic anhydride backbone and anthraquinone moieties linked by amide bonds. The dye polymer deposits onto tooth surfaces with relatively high efficiency, thereby increasing their efficiency.
· The dye moiety in the dye polymer is preferably selected from the following chromophore classes: anthraquinone, azo, triphenylmethane, azine, xanthene, indigo, methane and phthalocyanine.
· More preferred are the azo, anthraquinone and azine chromophore classes. The dye preferably contains an NH2 group, more preferably the NH2 group is bonded directly to the aromatic ring.
· Preferred dyes for such reactions include, but are not limited to, a series of dyes including Acid Violet 1, Acid Blue 230, Direct Violet 99, Direct Blue 33, Disperse Blue 28 and Basic Blue 47.