Patent ID: 7754198

Claim:
A thermally-reversible, aroma-releasing PVC thermoplastic polymeric matrix gel composition made by the process comprising the steps of: (a) a first step of creating a homogenous liquid solution comprising (i) greater than 80% weight/weight of a fragrance composition and/or odor counteractants; (ii) from about 4% to about 25% weight/weight of a PVC; and (iii) optionally, an Evaporation/Firmness Controlling Agent wherein the fragrance composition and/or odor counteractants, the PVC and, optionally, the Evaporation/Firmness Controlling Agent are mixed together until homogenous; followed by (b) a second step wherein the homogenous liquid solution from step (a) is heated by pumping through a first closed-loop heat exchanger to a temperature of from about 280° F. to about 330° F.; followed by (c) a third step wherein the homogenous liquid solution from step (b) is cooled by pumping through a second closed-loop heat exchanger to a temperature of from about 130° F. to about 200° F., thereby forming a thermally-reversible, aroma-releasing PVC thermoplastic polymeric matrix gel composition.