초록

This invention provides an encapsulated fragrance in which the fragrance is controlled can be released by exposing the encapsulated fragrance to a solution of a predetermined pH. The invention also contemplates a process for preparing encapsulated fragrances.

대표청구항 ▼

1. A method of releasing a fragrance comprising: a. encapsulating a fragrance within a copolymer consisting of from about 20% to about 80% by weight of an acrylic acid monomer and at least one ethylenically unsaturated polymerizable monomer; b. exposing the polymer encapsulated fragrance to a so

1. A method of releasing a fragrance comprising: a. encapsulating a fragrance within a copolymer consisting of from about 20% to about 80% by weight of an acrylic acid monomer and at least one ethylenically unsaturated polymerizable monomer; b. exposing the polymer encapsulated fragrance to a solution having a pH which dissolves the polymer and releases the fragrance. 2. The method of claim 1, wherein the acrylic acid monomer has the following formula wherein R1,R2and R3are independently selected from the group consisting of hydrogen and lower alkyl. 3. The method of claim 2, wherein the lower alkyl is a C1-C6alkyl. 4. The method of claim 2, wherein the acrylic acid monomer is methacrylic acid. 5. The method of claim 1, wherein the ethylenically unsaturated polymerizable monomer is selected from the group consisting of acrylates, methacrylates, vinyl pyridines, vinyl ethers, acrylamides, methacrylamides, pyrrolidones, and styrenes. 6. The method of claim 1, wherein the ethylenically unsaturated polymerizable monomer is selected from the group consisting of butyl methacrylate, styrene, ethyl methylacrylate, and methyl methylacrylate. 7. The method of claim wherein the fragrance comprises a liquid, a solid, a vapor or a combination of any of the foregoing. 8. The method of claim 1, wherein said fragrance comprises a mixture of two or more essential oils. 9. The method of claim 1, wherein the solution has a pH greater than 7.0. 10. The method of claim 1, wherein the solution has a pH greater than 8.0. 11. The method of claim 1, wherein the solution has a pH less than 7.0. 12. The method of claim 1, wherein said polymer encapsulated fragrance is adapted to release said fragrance in a timed and sustained manner.