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Patent Picks—Antimicrobials, Cleansers, Fragrance/Malodor and Delivery
By: Rachel L. Grabenhofer
Posted: December 8, 2010
page 5 of 6
This patent describes cysteine derivatives and their use as malodor counteractants. In addition, a process for their production and consumer products comprising them are described. According to the inventors, although perfume may cover the unpleasant odor of a product, frequently malodorous materials may be deposited on a treated substrate causing it to have malodor, which may become more evident in time as the co-deposited perfume evaporates. Such malodors are exacerbated at elevated temperatures, i.e., above ~30° C, and high humidity , i.e. about 50% relative humidity or higher.
Furthermore, in some parts of the world, the use of bar soap derived from relatively cheap animal and vegetable fats for washing clothing, textiles, skin, hair, cooking utensils and dishes is commonplace. The effects of the climate and presence of various additives can cause these bars become rancid and thus malodorous. The addition of perfume can musk this to some degree but this solution is not completely effective and it adds considerably to the cost of the bars.
Other consumer products, such as hair colorants, depilatory products, permanent wave products, skin bronzers, skin lighteners or hair removal products, have a strong smell due to their active ingredients, which may include for example, ammonia and thioglycolic salts. Other approaches to reducing malodors have been the elimination by absorption of the malodor by a porous or cage-like structure, often in combination with aroma chemicals, and the avoidance of the formation of malodors by such routes as the addition of antimicrobials and enzyme inhibitors.
While these approaches have yielded improvements in malodor control, in certain cases this approach is not applicable to consumer products comprising actives possessing strong smells. Thus, the present invention meets the need for further compounds that are more efficient against malodors. It has been found that the addition of a new class of 4-aza-7-thiadecadione derivatives to the consumer product may substantially or even completely overcome this problem.
Perfume delivery systems for consumer goods
US Patent Application 20100305021
Publication date: Dec. 2, 2010
Inventors: Dykstra, Robert Richard (West Chester, OH, USA)