Henkel Ag & Company, Kgaa

Silvia Sauf

Christian Kropf

Thomas Gerke

Ursula Huchel

Andreas Bauer

Sascha Schaefer

Nadine Bluhm

Claudia Klink

The invention is directed to the field of pro-fragrances used in detergents and cleaning agents, cosmetic agents and air fresheners, for example. The invention relates to particular cyclic ketals used as pro-fragrances. The invention also relates to detergents and cleaning agents, cosmetic agents and air fresheners containing ketals of the type. The invention further relates to a method for creating a long-lasting fragrance on surfaces and for repelling insects.

Cyclic ketals as fragrance precursor compounds

Silicic acid esters to which fragrances are bound, preferably as 1-aza-3,7-dioxabicyclo[3,3,0]octane compounds or as monocyclic oxazolidines and that are suitable for adding fragrance to detergents and cleaning agents because they release the bound fragrances in hydrolysis.

1-aza-3,7-dioxabicyclo[3,3,0]octane compounds and monocyclic oxazolidines as pro-fragrances

1-aza-3,7-dioxabicyclo[3.3.0]octane compounds, process for their preparation, their use as pro-fragrances, and washing and cleaning compositions, fabric softeners and cosmetics comprising them, and a process for prolonging the odor perception of such compositions.

1-aza-3,7-dioxabicyclo[3.3.0]octane compounds and their use as pro-fragrances

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Duesseldorf, Germany

Silvia Sauf