US 4,880,690 · Granted 1989-11-14
Perfume patch
A perfume patch comprising a fragrance-emitting member having a fragrance dispersed within an ultra-thin polyurethane membrane. A layer of pressure sensitive adhesive is applied to adhere the member to a surface. The polyurethane is formed from a diisocyanate, a macroglycol, and an acrylyl chain terminator to which a photoinitiator and a fragrance oil are added prior to curing. A barrier layer may be applied by an adhesive or other suitable means to prevent migration of the fragrance oil to the adhesive so that no residue of adhesive remains on the surface. The perfume patch preferably includes a support for the fragrance-emitting member for ease in application and handling.
Patent details
- Publication number
- US 4,880,690
- Filing date
- 1988-09-09
- Grant date
- 1989-11-14
- Assignee
- Thermedics, Inc.
- Inventor(s)
- SZYCHER; MICHAEL, ROLFE; JONATHAN L.
- CPC class
- C08F299/06
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