Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants
Reexamination Certificate
1999-03-05
2003-03-04
Qazi, Sabiha (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Biocides; animal or insect repellents or attractants
C424S045000, C424S489000, C424SDIG008, C424SDIG001, C514S919000, C514S729000
Reexamination Certificate
active
06528078
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a pest repellent composition, and more particularly to such compositions containing carane-3,4-diol as an active ingredient therein.
BACKGROUND OF THE INVENTION
Convenient pest repellents have been developed as pest thwarting compositions, which compositions are either utilized by directly spraying or spreading onto the human body. U.S. Pat. No. 5,130,136, which is incorporated herein by reference in its entirety, discloses carane-3,4-diol as an effective active ingredient for pest repellents, but pest repellents containing carane-3,4-diol have several deficiencies despite the ability of carane-3,4-diol to efficiently repel pests. One of said deficiencies lies with the adhesive character of carane-3,4-diol. Specifically, the adhesive character of carane-3,4-diol often causes a viscid sensation similar to the feeling of having a film of sweat covering the body (hereinafter referred to as an “adhesive feeling”) when a pest repellent which contains carane-3,4-diol is applied to the body. Because such an adhesive feeling is undesirable, pest repellents comprising inorganic or organic powders have been proposed to lessen the adhesive feelings associated with carane-3,4-diol pest repellent compositions. However, when such pest repellent compositions comprising powders are applied to the body, they often produce the visually unappealing effect of having a white powder sprinkled onto the applied surface (hereinafter referred to as a “whitening” effect).
The convenience with which such a pest repellent can be used is additionally diminished when the pest repellent comprises a powder. For example, when utilized in a spraying device, powders within a spray or aerosol composition can often cause obstructions inside pumps, valves, tubes, and/or at the nozzle of an atomizer, so that the spraying device cannot dispense the pest repellent composition efficiently. Further, because powders within the aerosol composition of the pest repellent composition can also tend to settle at the bottom of the spraying device, difficulties are also encountered in evenly redistributing powders after the they have settled at the bottom of the device.
The above deficiencies that are associated with prior known pest repellents are problematic. The above deficiencies are also especially troublesome in that such pest repellents can be inconvenient to utilize, whereas spraying devices are typically known and relied upon for their ease of use. Accordingly, the present invention is concerned with providing an effective pest repellent composition that can overcome the prior encountered problems in the art of adhesive feeling, whitening, and inconvenience.
SUMMARY OF THE INVENTION
The present invention provides for a pest repellent composition that may be formulated as an aerosol composition or as a liquid composition. More particularly, the present invention provides for aerosol and liquid pest repellent compositions that comprise a non-porous round polyethylene powder, a solvent, and carane-3,4-diol as a pest repelling active ingredient. The provided aerosol compositions additionally contain a propellant. The inventive composition overcome the prior encountered problems of adhesive feeling, whitening, and at the same time are convenient to utilize. For example, the present inventive compositions allow for spraying to be performed smoothly without encountering any problems of adhesive feeling, whitening or clogging of the spray or aerosol apparatus with which they are applied to a body surface.
DETAILED DESCRIPTION OF THE INVENTION
The pest repellent composition of the present invention may be formulated as a liquid composition or as an aerosol composition that contains said liquid composition in combination with a propellant, to thereby repel objective pests. Examples of the objective pests that can be repelled with the inventive compositions are the blood-sucking insects/acarina such as mosquitoes (Culicidae), black flies (Simuliidae), stable flies (Stomoxyidae), sand flies, biting midges (Ceratopogonidae), and the like.
The pest repellent compositions of the present invention contain carane-3,4-diol, which is a highly effective but oily and highly adhesive active ingredient. In the case that the pest repellent composition of the present invention is in the form of a liquid, the liquid preferably comprises carane-3,4-diol in an amount of about 3% to 50% by weight, more preferably about 4% to 45% by weight, and most preferably about 5% to 40% by weight, based on the total weight of the liquid composition.
The solvent employed in the liquid compositions of the instant invention preferably contains paraffin (or isoparaffin) and alcohol, but is not limited thereto, since other conventional solvents are also well known to those skilled in the art.
Preferably, the liquid compositions of the present invention comprise as a solvent, paraffin (or isoparaffin) in an amount of about 3% to 30% by weight, more preferably about 5% to 25% by weight, and an alcohol at an amount of about 20% to 90% by weight, preferably about 50% to 85% by weight, based on the total weight of the liquid composition.
The term “paraffin” as used herein means a saturated aliphatic hydrocarbon having the formula C
n
H
2n+2
, and includes straight chain paraffins (i.e. normal-paraffin) and branched chain paraffins (i.e. isoparaffin). As such, either normal-paraffins or isoparaffins may be employed as a solvent ingredient in the inventive compositions. Isoparaffin is preferably used as an ingredient in the solvent of the present inventive compositions. The carbon number of the employed paraffin or isoparaffin is preferably 4 to 20, and more preferably 4 to 15. Furthermore, the selected solvent may contain a mixture of miscellaneous paraffins, if so defined. For example, commercially available isoparaffins that may be employed as a solvent or a solvent ingredient in the present invention include IP Solvent, IP-1016, IP-1620, IP-2028 (product names from Idemitsu Petrochemical Company Ltd.), Isopar E, Isopar G, Isopar H (product names from Exxon Chemical Company), and so on.
The solvent used to produce one of the inventive compositions should preferably also comprise an alcohol such as a C
1-8
lower alcohol, but the use of an alcohol is not mandatory in the present invention. Preferably, the chosen alcohol should possess the ability to fulfill cosmetic purposes. Accordingly, examples of alcohols that are useful as solvents in the present invention are ethyl alcohol, isopropyl alcohol, other C
1-8
lower alcohols and alcohols that have been denatured with perfumes such as ethanols denatured with Bitrex (Denatonium benzoate, Mac Pharen Smith Ltd.). Further, a mixture of such alcohols can also be used in the present invention, if so desired.
The non-porous round polyethylene powders, which may be employed in the inventive compositions, preferably contain copolymers comprising mainly ethylene units, such as an ethylenepropylene copolymer. However, other copolymers containing ethylene units may also be utilized in the invention, provided that their powders are round and non-porous. The particles of any such powders used in the inventive compositions should preferably have the dimensions of a generally spherical shape, and more preferably have an average diameter of about 5 &mgr;m to 30 &mgr;m, and more preferably of about 7 &mgr;m to 20 &mgr;m. The present invention preferably comprises the non-porous round polyethylene powder particles in an amount where the weight ratio between carane-3,4-diol and the non-porous round polyethylene powder particles is from about 1:0.05 to 1:1, preferably from about 1:0.1 to 1:0.6, on a weight to weight basis.
In addition, the inventive liquid compositions, in order to more effectively distribute powder in the solvent, may optionally contain a dispersing agent. Various surfactants may be utilized as the dispersing agent, with examples of such surfactants including sorbitan fatty acid ester sufactants such as sorbitan monooleate and sorbitan monolaurate, silicone-type
Makita Mitsuyasu
Matsunaga Tadahiro
Qazi Sabiha
Sumitomo Chemical Company Limited
LandOfFree
Pest repellent composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pest repellent composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pest repellent composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3056433