Abstract:
Disclosed are dentifrice compositions comprising in a single phase: (a) from about 0.1% to about 30% of one or more linear polyphosphates having an average chain length of about 4 or more; (b) an ionic active ingredient selected from the group consisting of a fluoride ion source, a stannous ion source, a zinc ion source, a copper ion source and mixtures thereof, wherein the ionic active ingredient is present as a solid dispersion in the composition and delivers and effective amount of ionic active when solubilized; (c) a binder system comprised of (i) from about 0.05% to about 3% of a thickening agent selected from the group consisting of polysaccharides, carbomers, poloxamers, modified celluloses, and mixtures thereof; and (ii) from about 0.1% to about 70% of at least one humectant; wherein the dentifrice composition has a total water content of less than about 10%. Further disclosed are methods for stabilizing dentifrice compositions by providing such a binder system.
Abstract:
Disclosed is a system for delivering an oral care substance to the oral cavity comprising: (a) a delivery composition comprised of: (i) an organosiloxane resin; (ii) a volatile carrier capable of solubilizing the organosiloxane resin; (iii) a rheology modifier; and (iv) at least one oral care substance; and (b) a protective composition comprised of: (i) an organosiloxane resin; and (ii) a volatile carrier capable of solubilizing the organosiloxane resin. Further disclosed is a system for delivering an oral care substance to the oral cavity comprising: (a) a delivery composition comprised of: (i) an organosiloxane resin; (ii) a fluid diorganopolysiloxane-based polymer; (iii) a volatile carrier capable of solubilizing the organosiloxane resin and the fluid diorganopolysiloxane-based polymer; (iv) a rheology modifier; and (v) at least one oral care substance; and (b) a protective composition comprised of: (i) an organosiloxane resin; and (ii) a volatile carrier capable of solubilizing the organosiloxane resin. The protective composition may further comprise a fluid diorganopolysiloxane-based polymer and/or a rheology modifier. Still further disclosed is a method of using these systems.
Abstract:
Broadly, the present invention takes advantage of the ability of self-protonated sulfonated polyaniline (SPAN) to sense and/or modulate pH of a medium in the vicinity of a SPAN electrode. Accordingly, one aspect of the present invention is directed to a method for sensing pH of a medium in the vicinity of a sensing electrode wherein a SPAN electrode and a counter-electrode are placed in a medium and an indicia of said SAN correlative with the pH of said medium is monitored. As another aspect of the present invention, the pH of a medium in the vicinity of a sensing electrode is modulated by placing a SPAN electrode in the medium and applying a voltage to the electrode to controllably emit or absorb protons from said electrode to modulate the pH of the medium in the vicinity of the electrode. As a further aspect of the present invention, the activity/state of a biosensor/catalyst is sensed for the activity/state correlative with pH. As a further aspect of the present invention, the activity/state of a biosensor/catalyst, where the activity/state is correlative with pH, is controlled by associating the biosensor/catalyst with a SPAN electrode in contact with a medium containing said biosensor/catalyst, and applying a voltage to said electrode to controllably emit or absorb protons from said electrode to control the activity/state of said biosensor/catalyst.
Abstract:
Sulfonic acid-substituted polyaniline compositions and their derivatives are produced by reacting a polyaniline polymer with SO.sub.3 gas. The sulfonated polyaniline compositions have faster electronic and optical responses to electrochemical potentials and improved environmental stability solubility than the parent polyaniline polymer.
Abstract:
Methods for producing fibers of self-protonated sulfonic acid-substituted polyaniline compositions. The sulfonated polyaniline compositions have faster electronic and optical responses to electrochemical potentials comparing to its parent polyaniline, improved environmental stability, and improved solubility than the parent polymer, polyaniline.