Naarden International N.v.

Other

Petrus C Traas

Harmannus Boelens

John M Behan

Jeremy N Ness

Harrie Renes

Hans J Wille

Ernst-Ludwig Roehl

Hendrik J Takken

Joannis S Vitsas

Brian J Willis

The invention concerns clear o/w microemulsions comprising a perfume oil, an aqueous phase and one or more surfactants with HLB between 9 and 18, and co-surfactants of which at least 0.5% of ionic co-surfactant. The weight ratio of perfume oil to total surfactant is between 0.85 and 2.5, and preferably above 1. The quantity of perfume oil is 0.01-40% w/w, preferably below 35%, of the microemulsion and the quantity of water at least 40% w/w, preferably at least 50%. The microemulsions comprise less than 10% preferably less than 5%, of alcohol. The surfactants are preferably of the nonionic type. The microemulsions are very suitable for perfuming purposes where the amount of organic solvents should preferably be kept to a minimum, such as for perfuming skin or hair. The invention also concerns surfactant/perfume mixtures suitable for preparing the clear o/w microemulsions.

Aqueous perfume oil microemulsions

Time duration indicator systems comprising a porous inert carrier and a volatile liquid, capable of reversibly changing the visual properties of the carrier. Such indicator systems can be used for products having a limited duration of use or life.

Time duration indicator systems, and also products containing such

Process for the preparation of aqueous air freshener gels having an increased perfume content of at least 5% and preferably more than 10% of the total weight of the gel by taking up the perfume in finely divided, porous, water-insoluble, synthetic polymer as the carrier and subsequently combining the thus obtained perfume-laden carrier with an aqueous gel or with the gelforming components.

Process for the preparation of air-freshener gels

Novel acyl-polyalkyl indan compounds and the use thereof as a base for perfume, as well as perfume compositions, perfumed materials and perfumed articles.

Novel acyl-polyalkylindan compounds and the use thereof as a base for

The invention relates to a method for the preparation of both known and novel fragrances and flavors, and in particular to the preparation and use of the novel fragrance compound, 2,6-nonadiene nitrile, and to a novel method for the preparation of 4-heptynal as the starting product for the preparation of the 2,6-nonadiene nitrile fragrance compound.

Method for the preparation of fragrances, and method for the preparation

A new intermediate of formula I ##STR1## in which X is chlorine, bromine or hydrogen and Y is a free or protected --CHO group, which is used in the manufacture of boll weevil sex pheromone components of formula II ##STR2## in which Z is --CHO or --CH.sub.2 OH, by catalytic hydrogenation, optionally with protection of the formyl group of II by acetalisation. Compound II is prepared by formylation of isophorone directly or after reduction and dehydration.

Process for the preparation of boll weevil sex pheromone components

A process for the production of perfume compositions, perfumed materials or perfumed articles which includes admixing perfume components usual for this purpose and 4-methoxy benzonitrile and the compositions per se.

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Naarden, Netherlands

Petrus C Traas