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AssigneeThe Procter & Gamble Company
InventorsDennis R. Bacon, Thomas A. Borcher, Sr., Alessandro Corona, III, Clyde D. Palmer, Toan Trinh
Estimating the term…
Cyclodextrin complexes are prepared utilizing processes in which the cyclodextrin/active complex is prepared under concentrated reaction conditions in which there is no more than about 40% solvent, e.g., water, with mechanical working, to provide a complex ultimate particle size of less than about 12 microns and the resulting complex reaction mixture is incorporated, preferably without further operation, into at least one fabric conditioning material, preferably cationic fabric conditioning active, preferably in liquid (molten) form, preferably at a temperature between about 60 and about 95.degree. C., and mechanically worked to reduce complex aggregate particle size below about 200 microns. The resulting complex/fabric conditioning material mixture is used to prepare, e.g., dryer-added fabric softener article, e.g., sheet. The mixture of complex and fabric softener material preferably contains a small amount of an anionic surfactant to help avoid deposition of, e.g., unreacted cyclodextrin onto the equipment used to prepare the fabric conditioning composition and/or article (sheet).
Solid dryer-adder fabric conditioning composition comprising an effective amount of active/cyclodextrin inclusion complex reaction mixture having an actual particle size of less than about 200 microns, said composition being prepared by a process in which said complex is prepared by a concentrated process with mechanical working and the resulting reaction mix is added directly to at least a portion of said fabric conditioning composition with mechanical working to reduce particle size of the complex to less than about 200 microns.
The process of making a dryer-added fabric conditioning composition comprising preparing cyclodextrin/active complex reaction mixture under concentrated reaction conditions with no more than about 40% solvent with high mechanical energy input to provide complex ultimate particles that are smaller than about 12 microns and incorporating the resulting complex reaction mixture into at least one fabric conditioning material and mechanically working to reduce aggregate particle size of the complex to less than about 200 microns.
Dependencies are inferred from the claim text.