Drug – bio-affecting and body treating compositions – Deodorants
Reexamination Certificate
1999-01-05
2001-01-23
Clardy, S. Mark (Department: 1616)
Drug, bio-affecting and body treating compositions
Deodorants
C424S076200, C424S076300, C424S076400, C424S076500, C424S076800, C424S405000
Reexamination Certificate
active
06177070
ABSTRACT:
BACKGROUND OF THE INVENTION
Most deodorants now in use to combat or eliminate malodors contain substances with powerful and persistent odors which essentially mask the obnoxious odor. However, many people find these odors objectionable, so that an object of this invention is to formulate deodorants compositions that would quickly deodorize offensive odors and leave the environment essentially odorless.
BRIEF SUMMARY OF THE INVENTION
The present invention includes a deodorant composition composed of at least two different aldehydes in the form of addition products and an unsaturated organic compound. Preferably, the addition compounds are a hemiacetal or an acetal of an alcohol or glycol.
DETAILED DESCRIPTION
A feature of the present invention resides in the provision of deodorant compositions which rapidly eliminate or greatly reduce offensive odors leaving no persistent odor of their own. Previously I had found that various lower alkyl or aryl substituted 6-hydroxy-1,3-dioxanes serve as effective deodorants and that their deodorant action against certain odors is increased in mildly acidic or mildly basic media (U.S. Pat. No. 4,078,050). The substituted dioxanes described in this earlier patent are trimers of aldehydes that are in equilibrium with their monomers. As trimers, the aldehyde groups are stabilized and protected from air oxidation.
I have since discovered that improved deodorants for offensive odors can be made by combining at least two different aldehydes, preferably in the form of their addition products, in a suitable vehicle or carrier with at least one volatile unsaturated compound. Both aldehydes are preferably in the form of a hemiacetal or acetal of an alcohol or glycol, thereby increasing the efficacy of the deodorant composition.
The preferred aldehydes are formaldehyde, acetaldehyde, glyoxal, 2-hydroxybutanal, glutaraldehyde, or benzaldehyde. The preferred alcohols and glycols are methanol, ethanol, isopropanol, propylene glycol, triethylene glycol or hexylene glycol. Each addition product of the present invention is formed from a different aldehyde. One alcohol or glycol may be chosen to react with each different aldehyde.
In the special case of formaldehyde, a number of different addition products can also be formed with nitromethane, bromonitromethane, or urea and used, such as tris(hydroxymethyl)nitromethane, 2-bromo-2-nitro-1,3-propanediol, dimethyloldimethylhydantoin, and substituted oxazolidines.
All of the addition products of the present invention are in equilibrium with their component compounds, so that in the presence of a malodor which reacts with the free aldehyde, more of the addition compound will revert to the aldehyde form. Also, the addition products tend to prevent all of the chosen aldehydes from oxidizing and provide a reservoir of aldehyde for reaction with the malodor. Furthermore, these addition compounds also have the advantage of reducing the odor of the aldehyde.
The other essential component of these deodorants is at least one unsaturated compound. The preferred unsaturated compounds are usually the more volatile components of an essential oil or flavoring. The preferred compounds are citral, geraniol, ionone, limonene, linalool and linalyl acetate. Because these unsaturated compounds are reactive molecules and subject to air oxidation, another feature of the present invention resides in the provision of a nonvolatile antioxidant oxidant, such as ascorbic acid or its sodium salt, butylated hydroxyanisole, butylated hydroxytoluene and alpha-tocopherol.
A further feature of the present invention resides in the provision of deodorant compositions of the types described which in their preferred forms contain a surfactant or wetting agent. The purposes of the surfactant are to increase the rates at which the deodorant solutions penetrate sources of odors in order to speed up the rates of deodorization and to aid in the removal of any residual materials from fabrics, rugs and floors. The amount of surfactant would normally be small, but larger amounts of surfactants could be used to prepare solutions for deodorizing pets who have encountered a skunk or rolled in dead fish or the like.
An added feature of the present invention resides in the provision of deodorants of the types described which in their preferred forms contain a chelating agent to aid in stain removal.
Another feature of the present invention resides in the provision of deodorants of the types described, which in their preferred forms contain an antimicrobial agent which will aid in the deodorization process by inhibiting the growth of microorganisms and thereby reduce the formation of odoriferous products by them. The dioxane compounds themselves are found to exhibit antimicrobial action, but other antimicrobial agents may be added for greater effectiveness. The addition products of formaldehyde, where used, will also contribute to antimicrobial activity. Among the preferred antimicrobial agents are sodium benzoate, sodium propionate, dialkyl (C
8
-C
18
) dimethyl ammonium chloride, and salts of undecylenic acid.
The deodorant mixture of compounds is best applied from a solution or suspension in a volatile liquid vehicle. Water is a preferred vehicle, but organic solvents may be used in whole or in part where desired for greater solubility of the organic components.
These deodorants are designed to be sprayed directly on the source of the malodor and thus prevent any further odor formation. The active components of these deodorant formulations are volatile so that some deodorant will be released into the air on spraying the source of the malodor thus deodorizing the malodor already present in the ambient air.
I have discovered that these improved formulations are even more effacious in reducing or eliminating unpleasant odors associated with excreta, pets, necrotic tissue and skunks than those described in my previous patent. Spraying the inside of the toilet before use eliminates fecal odor or defecation. Similarly, they are useful to deodorize odoriferous diapers, incontinent pads and bedpans. For deodorization of ostomy bags a more concentrated formulation can be made and added dropwise to bags before use.
Application on cat litter eliminates the unpleasant odors which can build up in cat boxes. These formulations may be also used on furniture, carpeting and flooring contaminated with excreta. For example, they have the advantage of eliminating urine odors so that the animal does not return to the same place to urinate. In veterinarians' offices, the use of these deodorants on baseboards, carpeting and flooring reduces the incidence of urination by dogs and cats. Pets will often urinate in an area where the odor of urine is detected, but apparently are reluctant to do so if urine odor is not detected.
In veterinary medicine and mortuary science, these deodorants are useful for deodorizing necrotic tissue. They are also effective in greatly reducing or eliminating the odor of skunk from pets, cars, camping equipment and the like.
The mildly acid formulations in the lower concentrations can be applied to the genital and anal area of tom cats to control their offensive odor. Similarly, the application of these acidic deodorants three or four times daily to the genital areas of bitches in heat greatly reduces this odor so that their attraction to male dogs is greatly diminished. Application of these deodorants to pets who have rolled in dead fish or encountered a skunk controls these offensive odors also.
The mildly alkaline deodorant formulations in the lower concentrations are also useful in deodorizing dog body odor by applying the deodorant to facial folds, ears, genital and anal areas using a cloth wet with the deodorant.
The alkaline deodorant formulations are also effective against human perspiration odor. Laundering washable clothing removes perspiration odor, but dry cleaning does not. These formulations are therefore useful to deodorize nonwashable clothing, especially costumes and uniforms, shoes, athletic equipment and prosthetic devices which smell
Clardy S. Mark
Kinney & Lange , P.A.
Shelborne Kathryne E.
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