Diminishing gel compositions and associated methods
View Patent ↗Diminishing gel compositions are disclosed and described. A diminishing gel composition can include a polymer matrix, a gel-diminishing agent, and a releasable active agent, such as an olfactory agent. The gel-diminishing agent can facilitate a visually noticeable or detectible gradual decrease in volume of the gel composition while in use. The releasable active agent can be released from the gel composition at a rate and amount that is sufficient to produce a desired result, such as an effective olfactory event.
1. A diminishing gel composition, comprising:
a polymer matrix, said polymer matrix including a polymer having repeating monomer units, wherein the repeating monomer units are terminated by amine groups;
0.01 wt % to about 10 wt % of, based on the total weight of the composition, a gel-diminishing agent that facilitates a gradual decrease in volume of the gel composition while in use, said gel-diminishing agent being selected from the group consisting of cyclohexasiloxane, cyclopentasiloxane, cyclotetrasiloxane, cyclic polydimethylsiloxane, linear polydimethylsiloxane, hexamethyldisiloxane, and combinations thereof; and
a releasable active agent which is released in an effective amount from the composition, said releasable active agent being selected from the group consisting of: a fragrance, a pest repellant, a therapeutic agent, a pesticide, and combinations thereof.
2. The composition of claim 1 , wherein the polymer matrix includes a polymer and a carrier solvent selected from the group consisting of water, organic solvent, a surfactant, an antioxidant, or a combination thereof.
3. The composition of claim 2 , wherein the polymer is present in an amount of from about 1 wt % to about 50 wt %, based on the total weight of the composition.
4. The composition of claim 2 , wherein the carrier solvent is present in an amount of from about 0.01 wt % to about 30 wt %, based on the total weight of the composition.
5. The composition of claim 1 , wherein the polymer is a polyamine that has an amine number of from about 10 to about 100 milliequivalents (meq).
6. The composition of claim 1 , wherein the polymer is a polyamine that has a weight average molecular weight of from about 4,000 Mw to about 30,000 Mw.
7. The composition of claim 1 , wherein the polymer is a polyamine that is a blend of at least two different polyamines.
8. The composition of claim 1 , wherein the gel-diminishing agent is present in the gel composition in an amount to decrease the volume of the gel composition by at least 20% over a period of about 42 days from activation of the gel-diminishing agent.
9. The composition of claim 1 , wherein the gel-diminishing agent is present in the gel composition in an amount to extend effective release of the releasable active agent by at least 5% as compared to a gel composition without the gel-diminishing agent.
10. The composition of claim 1 , wherein the releasable active agent is present in an amount of from about 0.01 wt % to about 90 wt %, based on the total weight of the composition.
11. A method of manufacturing a diminishing gel composition, comprising:
admixing a gel-diminishing agent selected from the group consisting of: cyclohexasiloxane, cyclopentasiloxane, cyclotetrasiloxane, cyclic polydimethylsiloxane, linear polydimethylsiloxane, hexamethyldisiloxane, and combinations thereof, with a gel forming polymer and carrier solvent to form a mixture, said gel-forming polymer having repeating monomer units, wherein the repeating monomer units are terminated by amine groups; and
allowing the mixture to gelatinize.
12. The method of claim 11 , further comprising adding a releasable active agent.