Anti-smoke perfumes and compositions

Details Anti-smoke perfumes and compositions Anti-smoke perfumes and compositions

1996-05-30

1997-10-14

Mosley, Terressa

Tobacco

Tobacco users' appliance

Device used for smoking

131334, 426533, 426534, 568592, A24F 302

Patent

active

056761635

DESCRIPTION:

BRIEF SUMMARY
This application claims benefit of international application PCT/EP94/03882, filed Nov. 23, 1994.
This invention is concerned with the use of certain perfume ingredients to counteract smoke malodours, particularly tobacco smoke malodour. The invention also relates to perfumes and products which incorporate such perfume ingredients.
The problem of malodours has been recognised for many years, and numerous methods have been developed to overcome these where they occur. Perfumes are commonly used as malodour counteractants either alone or in combination with other materials such as absorbents, oxidants and other actives.
Perfumes generally have some capability to neutralise a wide variety of malodours, this effect arising in large part from the phenomenon of `odour masking` wherein the perfume intensity is sufficiently high to swamp or distort the olfactory perception of malodour. Often, however, the dosage levels of perfume required to obtain effective masking are outside the dosage levels preferred by product formulators and liked by customers.
On the other hand, it is known that certain perfumes are surprisingly effective against specific malodours, and this activity is not explainable only in terms of odour masking. For example, GB 2016507, U.S. Pat. No. 4,134,838, U.S. Pat. No. 4,663,068, GB 2013493 and EP 404470 all describe perfumes which offer deodorant activity against body odour when incorporated into various products (eg soap, fabric treatment products, skin products). Likewise, perfumes are known which are effective against a range of other malodours, but perfumes which have high activity against smoke malodour are rare, and no methods have been reported for creating such perfumes in a structured manner. Thus, deodorant perfumes created according to the guidelines described in the patents referenced above would not appear to be significantly more efficacious against smoke malodour than any randomly chosen perfume would be by odour masking.
EP-A-0 401 140 describes mixtures of aldehydes which can produce good general deodorancy, embodiments of the invention being aerosol airfresheners and disinfectant liquids perfumed solely with such aldehyde mixtures. The majority of common perfume aldehydes are included within the broad definitions given, but the most key mixtures cited were based on helional (2-methyl-3-(3',4'-methylenedioxyphenyl)propanal), citral, citronellal and jasmonal (.alpha.-amylcinnamic aldehyde).
FR 2666510 discloses deodorising compositions designed to counteract malodours from many disparate sources, e.g. animal and vegetable sources, industrial processes, drains, and tobacco combustion. A number of perfume aldehydes, alcohols and esters together with recommended dosages are detailed, among which citral and phenyl-acetaldehyde were key components. One further component, described as a `chemical molecule` (as distinct presumably from similar materials used in perfumery) was required to be present, preferably in at least 5% by weight of the composition; the sole example of this class was the straight chain aldehyde heptanal. Several airfreshening product formulations were disclosed as embodiments of the invention.
EP-A-0 247 946 describes perfumes for counteracting the malodour of animal excretions or excrements containing perfume ingredients with a vapour pressure below 4 Pa at 25.degree. C. Initially a whole list of the most diverse known perfume ingredients are mentioned as suitable, but on further reading of the specification it becomes clear that only alimited number of compounds of various chemical classes are preferred among which helional as the only aldehyde.
Although in the references mentioned above counteraction of malodours appears to be intended, it is often not clear whether real counteraction is involved or whether the perfumes described therein merely have a masking effect, since a true comparison with other perfumes, without the claimed components is often lacking.
Other methods for combatting smoke which do not rely upon the use of perfume ingredients are of course

REFERENCES:
patent: 4036237 (1977-07-01), Teng
patent: 5320131 (1994-06-01), Dull
Patent Abstracts of Japan, vol. 012, No. 297, (C-519), Aug. 12, 1988 & JP,A,63 066115, Mar. 24, 1988, see abstract.
Database WPI, Section Ch, Week 8530, Derwent Publications Ltd., Class D21, AN 85-181161 & JP,A,60 109 512, Jun. 15, 1986, see abstract.

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