Perfume compositions – Perfume compositions
Patent
1988-02-05
1989-04-25
Lone, Werren B.
Perfume compositions
Perfume compositions
512 2, 422 75, 424 764, A61K 746
Patent
active
048248274
ABSTRACT:
Disclosed are end point indicator compositions and devices containing them, particularly useful as air freshener devices, comprise compositions containing a polar indicator dye which assumes a first color or is colorless in the presence of a room temperature volatilizable solvent which is initially present in excess and a small amount of a proton donating compound. The indicator dye assumes a second color visually distinct from the first color in the presence of the proton donating compound after the majority of the solvent escapes from the remainder of the composition. Optionally, the compositions further include color change developers and/or secondary dyes to render the change to the second color, indicating attainment of the end point, more apparent to a user.
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Berrido Colin
Kelly Petrina M.
Lone Werren B.
S. C. Johnson & Son Inc.
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