CA1117079A - Aerosol dispensing system - Google Patents
Aerosol dispensing systemInfo
- Publication number
- CA1117079A CA1117079A CA000339292A CA339292A CA1117079A CA 1117079 A CA1117079 A CA 1117079A CA 000339292 A CA000339292 A CA 000339292A CA 339292 A CA339292 A CA 339292A CA 1117079 A CA1117079 A CA 1117079A
- Authority
- CA
- Canada
- Prior art keywords
- diptube
- valve
- phase
- liquid
- permeable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/32—Dip-tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nozzles (AREA)
- Cosmetics (AREA)
Abstract
27,561 Title: AEROSOL DISPENSING SYSTEM
ABSTRACT OF THE DISCLOSURE
An aerosol dispensing device for a three phase system which dispenses the product in a uniform fine mist at a high spray rate.
ABSTRACT OF THE DISCLOSURE
An aerosol dispensing device for a three phase system which dispenses the product in a uniform fine mist at a high spray rate.
Description
1117~79 The present invention relates to a pressurized aerosol device using a hydrocarbon propellant to dispense a composition which is not soluble or miscible in the hydro-carbon as a fine, dry spray at a uniform rate. More, particularly, the invention relates to a novel aerosol valve/ditube assembly for dispensing a water-based hair spray concentrate with a hydrocarbon vapor/liquid propellant.
BACKGROUND OF THE INVENTION
It is known to dispense fluids from pressure con-tainers under the propelling action of a gas or other propel-lant within the containers and, more particularly, to dispense from a single container simultaneously a mixture of two imm-iscible liquids which form in the container two or more sep-arate and non-interspersed layers.
AS will be understood, a wide variety of materials may be dispensed from pressurized containers under the action of gaseous or vaporized propellant therein as with the so-called aerosol types of packaging. Generally in situations of this character, the material to be dispensed is admixed with a propellant (gas or highly volatile liquid, etc.) in a sealed container having a valved eduction tube whereby open-ing the valve provides for the propellant to force the material to be dispensed up the eduction tube and out of the container.
Such a system is called a two phase system, phase I being an 25~ upper layer of vaporized propellant, and phase II being a ~.
-; mixture of liquid propellant and product to be dispensed.
~F
If, however) the particular materials to be dispensed are in the nature of immiscible liquids (one of whic}l may be thc propellant) which form separate or distinct and non-interspersed layers within the container, dif-ficulty may be experienced in obtaining a simultaneous dispensing of both layers and/or a desirably homogeneous mixture thereof, especially if the immiscible materials are such as to resist interspersion or admixture by shaking or otherwise immediately prior to opening tlle dispensing valve. This is called a three phase system in which phase I is the upper layer of vaporized propellant, phase II is an intermediate layer of liquid propellant, and phase III is the lower layer of product.
Traditionally, an aerosol valve is fitted with a diptube, extending into the product to be dispensed, through which the product flows into the valve body and through the stem and button. A vapor tap, which usually opens into the body of the valve, allowing propellant vapor to mix with the product stream, may be included in the device.
~Iydrocarbons, for example, when mixed with a water-based product, tend to float on the surface thereof, since the two phases are immiscible.
Technology is available to formulate hair spray concentrates or antiperspir-ants~ and so forth, using water as a solvent. Heretofore, the difficulty with such systems has been dispensing them as aerosol sprays using conventional aerosol valves, which do not provide sufficient break up of the product concentrate, resulting in streaming rather than misting. Recent technology has shown that such products can be dispensed by making use of the hydrocarbon va~or. This has not been satisfactory, since spray rates are low, possibly because of the fact that the vapor may occupy most of the volume of the body of the valve.
This invention aims at the provision of apparatus for dispensing from aerosol containers simultaneously and preferably with predetermined
BACKGROUND OF THE INVENTION
It is known to dispense fluids from pressure con-tainers under the propelling action of a gas or other propel-lant within the containers and, more particularly, to dispense from a single container simultaneously a mixture of two imm-iscible liquids which form in the container two or more sep-arate and non-interspersed layers.
AS will be understood, a wide variety of materials may be dispensed from pressurized containers under the action of gaseous or vaporized propellant therein as with the so-called aerosol types of packaging. Generally in situations of this character, the material to be dispensed is admixed with a propellant (gas or highly volatile liquid, etc.) in a sealed container having a valved eduction tube whereby open-ing the valve provides for the propellant to force the material to be dispensed up the eduction tube and out of the container.
Such a system is called a two phase system, phase I being an 25~ upper layer of vaporized propellant, and phase II being a ~.
-; mixture of liquid propellant and product to be dispensed.
~F
If, however) the particular materials to be dispensed are in the nature of immiscible liquids (one of whic}l may be thc propellant) which form separate or distinct and non-interspersed layers within the container, dif-ficulty may be experienced in obtaining a simultaneous dispensing of both layers and/or a desirably homogeneous mixture thereof, especially if the immiscible materials are such as to resist interspersion or admixture by shaking or otherwise immediately prior to opening tlle dispensing valve. This is called a three phase system in which phase I is the upper layer of vaporized propellant, phase II is an intermediate layer of liquid propellant, and phase III is the lower layer of product.
Traditionally, an aerosol valve is fitted with a diptube, extending into the product to be dispensed, through which the product flows into the valve body and through the stem and button. A vapor tap, which usually opens into the body of the valve, allowing propellant vapor to mix with the product stream, may be included in the device.
~Iydrocarbons, for example, when mixed with a water-based product, tend to float on the surface thereof, since the two phases are immiscible.
Technology is available to formulate hair spray concentrates or antiperspir-ants~ and so forth, using water as a solvent. Heretofore, the difficulty with such systems has been dispensing them as aerosol sprays using conventional aerosol valves, which do not provide sufficient break up of the product concentrate, resulting in streaming rather than misting. Recent technology has shown that such products can be dispensed by making use of the hydrocarbon va~or. This has not been satisfactory, since spray rates are low, possibly because of the fact that the vapor may occupy most of the volume of the body of the valve.
This invention aims at the provision of apparatus for dispensing from aerosol containers simultaneously and preferably with predetermined
- 2 -1117~179 proportioning separate and immiscible materials forming in the container two or more distinct separate layers. The dispensing will preferably be carried out in a manner whereby the simultaneous dispensing from all layers and the predetermined proportioning thereof is maintained for the entire capacity of the container and regardless of the changing levels of liquid therein.
SCOPE OF THE INVENTION AND OBJECTS
The present invention provides valve and diptube means for a pressurized aerosol container, containing two immiscible liquid phases and a vapor phase therein; said valve and diptube means adapted to simultaneously draw off both liquid phases to said valve means; said diptube means being attached to said valve means at its upper end and having the lower end extend-ing to a point near the bottom of said container, said diptube means compris-ing means permeable to one of said liquid phases and means to pass the other of said liquid phases, said diptube means being substantially impermeable to said vapor phase.
A means of this type may be used for dispensing water-based products, using a hydrocarbon propellant, which can be formulated as a uniform, non-flammable spray.
Such products may be, for example hair sprays, antiperspirants, deodorants, shaving creams, space deodorizers, bathroom cleaners, aerosol paints, and the like.
BRIEF DESCRIPTION OF THE DRA~INGS
The invention may be better understood by reference to the drawings in which:
Figure 1 is a side sectional diagramatic view of a prior art pressurized package showing a two phase product/propellant system.
Figure 2 is a side sectional diagramatic view of a prior art pressurized package showing a three phase product/propellant system.
'~
SCOPE OF THE INVENTION AND OBJECTS
The present invention provides valve and diptube means for a pressurized aerosol container, containing two immiscible liquid phases and a vapor phase therein; said valve and diptube means adapted to simultaneously draw off both liquid phases to said valve means; said diptube means being attached to said valve means at its upper end and having the lower end extend-ing to a point near the bottom of said container, said diptube means compris-ing means permeable to one of said liquid phases and means to pass the other of said liquid phases, said diptube means being substantially impermeable to said vapor phase.
A means of this type may be used for dispensing water-based products, using a hydrocarbon propellant, which can be formulated as a uniform, non-flammable spray.
Such products may be, for example hair sprays, antiperspirants, deodorants, shaving creams, space deodorizers, bathroom cleaners, aerosol paints, and the like.
BRIEF DESCRIPTION OF THE DRA~INGS
The invention may be better understood by reference to the drawings in which:
Figure 1 is a side sectional diagramatic view of a prior art pressurized package showing a two phase product/propellant system.
Figure 2 is a side sectional diagramatic view of a prior art pressurized package showing a three phase product/propellant system.
'~
- 3 -~17~79 Figures 3 to 7 are alternative constructions for the valve and diptube assembly of the present invention.
DETAILED DESCRIPTION OF T~IE INVENTION AND DRAWINGS
Referring to Figure l, a conventional two phase aerosol system is shown having container 1 with body 2, bottom 3, collar 4 and top 5. A valve member 6 fits into top 5. The contents of container 1 are divided into two phases, an upper phase I and a lower phase II. Phase II consists of a liquid propellant which is a vapor under atmosphere pressure and in which the product to be dispensed is dissolved or admixed. Phase I is vaporized propellant.
Valve member 6 comprises a hollow stem with the valve 8 normally seated against gasket 9 by means of spring 10. Surrounding the valve is a housing 11 with a tailpiece 12 to which flexible diptube 13 is attached. The valve stem 7 has actuator or head 14 mounted thereon with passageway 15 therethrough. When actuated by pressing down head 14, the valve 8 is moved downward to open into interior cavity 16 of valve body 11. Since vapor phase I and liquid phase II
are under superatmospheric pressure, fluid is forced up diptube 13 into passageway 15. ~le liquid becomes vaporized and leaves head orifice 17 as a fine spray.
DETAILED DESCRIPTION OF T~IE INVENTION AND DRAWINGS
Referring to Figure l, a conventional two phase aerosol system is shown having container 1 with body 2, bottom 3, collar 4 and top 5. A valve member 6 fits into top 5. The contents of container 1 are divided into two phases, an upper phase I and a lower phase II. Phase II consists of a liquid propellant which is a vapor under atmosphere pressure and in which the product to be dispensed is dissolved or admixed. Phase I is vaporized propellant.
Valve member 6 comprises a hollow stem with the valve 8 normally seated against gasket 9 by means of spring 10. Surrounding the valve is a housing 11 with a tailpiece 12 to which flexible diptube 13 is attached. The valve stem 7 has actuator or head 14 mounted thereon with passageway 15 therethrough. When actuated by pressing down head 14, the valve 8 is moved downward to open into interior cavity 16 of valve body 11. Since vapor phase I and liquid phase II
are under superatmospheric pressure, fluid is forced up diptube 13 into passageway 15. ~le liquid becomes vaporized and leaves head orifice 17 as a fine spray.
4 -1117~79 In Fig. 2, a conventional aerosol container 1 of the same type as Fig. 1 is shown having a three phase system, in which for example, phase I is vaporized propellant, phase II is liquified propellant and phase III is a liquid product not miscible with the propellant and which is heavier than the liquid propellant. For example, the propellant may be a hydro-carbon, e.g. butane and the product phase may be a water-based hair spray. When actuator head 14 is depressed, phase III
liquid rises up tube 13 into valve 6, but leaves orifice 17 as a stream or poorly dispersed spray rather than a fine mist since there is no vaporizable propellant admixed with it. In order to form a better mist spray, a tap 18 on valve body 11 has been added to admit vapor phase I to the body cavity 16 where it admixes with product liquid phase III giving a more mist-like spray from orifice 17. Such a system, however, has the disadvantage of an extremely low spray rate since the vapor occupies most of the volume of the valve body.
We have now found that this disadvantage may be over-come by the use of the valve assembly shown in Figs. 3 to 7.
In the present device, the high spray rates and desired spray characteristics are obtained by mixing the liquid phase II
with the product phase III which are mixed in the housing of the valve and dispensed in the same ratio as they are charged into the can.
It has been proposed to admix a liquified phase with a non-miscible phase in the prior art such as in U.S. Patent Nos. 3,113,698; 3,260,421; or 3,272,402.
The problems encountered with these systems were that they were complex and expensive. Our inventive valve system accomplishes the admixing of phases II and III by a different principle and by means of a much simpler device.
In Fig. 3 is illustrated an example of a valve and diptube assembly of the present invention.
In addition to all the conventional parts, as in the valve of Fig. 2, this new valve will have an additional diptube 19 which fits on housing 11 at a second tailpiece 20. Diptube 19, closed at the lower end extends to the bottom of container 1. The purpose of this second diptube 19 is to draw liquid phase II into the valve body. Its material of construction is such that it will not allow vapor phase I to permeate through and would preferentially allow liquid phase II to travel through the tube. A silicone treated filter paper can be used. When actuator head 15 of aerosol valve 6 is depressed, the liquid phase II, e.g. a hydrocarbon such as butane travels through permeable tube 19 while the product phase III, e.g. a water-based concentrate goes up the conventional tube 13 which is open at its lower end 21. The phases II and III mix within housing 11 and discharge through the head orifice 17.
As the product is used up, the vapor phase area I, increases. However, since tube 19 does not allow gaseous phase I to pass through, it does not affect the relative use up of the two liqu;d phases II and III. This results in a fine uniform spray which remains constant throughout the life of the can. A vapor tap 18 can be added optio~lly to admit phase I
vapor to aid in draining phases II and III when the unit is not operating. This draining is desirable for optimum performance so that a burst of liquid propellant is not obtianed at any time. The function described above is unlike the use of con-ventional vapor tap described in the prior art when vapor is admitted to enhance mixing. Tube 19 may also be a borosili-cate glass filter tube (Balstron Filter Products). This con-sists of borosilicate glass fibers bonded together with a fluorocarbon cement.
An alternative construction is shown in Fig. 4.
Valve body 6 has a tailpiece 12 and diptube 13. A metal tube 22 having a plurality of perforations 23 is fitted to valve body 11 and surrounds diptube 13. Tube 22 is closed at its lower end by means impermeable to both phases II and III, such as a stopper 24 through which diptube 13 extends, opening into phase III. Tube 22 is wrapped with a material 25 which is permeable to phase II but not phase III, such as a silicone treated filter paper and communicates with valve 6 through propellant tap orifice 20. Actuation of head 15 causes phase III liquid product to enter orifice 21 to diptube 13 and travel upward to valve 6. Phase II liquid propellant perme-ates layer 25 and passes through perforations 23 into the in-terior of tube 22 traveling upward to propellant orifice 20 where it enters the body and admixes with phase III.
In Fig. S, a single diptube 19 permeable only to liquid phase II and open at the lower end is attached to tailpiece 12 of valve 6. In this embodiment, the fluid phase III enters the tube through opening 26 at the lower end of tube 19, while liquid propellant phase II permeates the tube walls, both phases admixing in tube 19 and also within valve 6.
The permeable diptube may be a poro~eric plastic, such as polystyrene, polyethylene, polypropylene, nylon, poly-carbonates~ T~flon* polyvinylchloride. These poromeric mater-ials are characterized by having multidirectional pores throughout the plastic mass. The pore size may vary from about 0.1 to 30 microns and larger and the pore density, the measure of pores per unit area, typically may be 70 percent, but may be lower or higher. The pore size desired will be dependent on a number of factors such as the internal diameter of the tube, the ~iscosity of the fluid concentrate. In one particular application a tube having an internal diameter of l/16 inch was used with a hair spray concentrate having a viscosity of about 7 centistokes. In this instance, the desired pore size is from 1 to 5 microns and the pore density is from about S0 to 70 percent.
The poromeric tube may be prepared by a number of different methods.
In one method, the tube is made by casting of a polymer solution. A solution of polymer in which the compati-~ * Trademark 1.~.17~79 bility of the solute and solvent i5 highly temperature depen-dent is cast or extruded. The solvent separates from the solute to form globules suspended in a polymer - solvent matrix. Removal of the solvent yields a porous material.
Pore size is determined by the solution behavior of the com-ponents used and the rate of cooling of the solution and ranges from .1 microns to 11 microns.
In another method, the tube is made by sintering of plastic beads in molds. Beads of plastic are rounded (made spherical) and sorted for size. The pore size is determined by the bead size and typically ranges from 10 microns to 30 microns and larger with normal techniques but can be made down to .2 microns with special techniques.
A third method for making the diptube is by extrusion of a plastic with starch or salt suspended within.
The starch or salt is removed by extraction in a hot bath.
The starch requires hydrolysis to sugar by including acid in the extraction process. The size of the pores produced is dependent on the size of the salt or starch particles used and ranges from 10 microns downward. A pore density of 70 percent is obtained.
In Fig. 6, a single diptube 27 is provided which is open at the bottom 28 and has one side 29 impermeable to phase II and phase III and side 30 permeable to phase II but impermeable to phase III. The liquid product phase III enters tube 27 through orifice 28, and liquid propellant phase II
enters the tube through permeable wall 30 of the tube.
Fig. 7 is similar to the embodiment of Fig. 6 except that the diptube 31 consists of alternating spiral bands of a material 32 which is permeable to phase II and material 33 not permeable to either phase II or III.
Phase III enters through the open end 34 of tube 31, and phase II propellant enters through material 32.
Following are Examples of formulations which may be dispensed in the inventive container and valve assembly of the present invention.
lil7(J7~1 g Example I
Insecticide % w/w Pyrethrins 0.25 Piperonyl Butoxide 1.25 Fragrance 0.20 Petroleum Distillate 1.25 Deionized Water 67.05 Isbutane 30-00 100.00 Example II
Space Deodorant Perfume 1.50 Deionized Water 73.50 Isobutane 25.00 100.00 Example III
Antiperspirant % w/w Aluminum Chlorhydrol (Water ~;oluble) 15.00 Perfume 0.50 Deionized Water 44.50 Isobutane 25.00 Alcohol 190 Proof 15.00 100.00 ,~....
1117~
Example IV
Deodorant Alcohol 190 Proof 20.00 Perfume 1.50 Deionized Water 53.50 Isobutane 25.00 100 ~ 00 Example V
Hair Spray Alcohol 190 Proof 43.72 Gantrez ES 225 6.00 A.M.P. 0.13 Deionized Water 25.00 Perfume 0.15 Isobutane 25.00 100.00
liquid rises up tube 13 into valve 6, but leaves orifice 17 as a stream or poorly dispersed spray rather than a fine mist since there is no vaporizable propellant admixed with it. In order to form a better mist spray, a tap 18 on valve body 11 has been added to admit vapor phase I to the body cavity 16 where it admixes with product liquid phase III giving a more mist-like spray from orifice 17. Such a system, however, has the disadvantage of an extremely low spray rate since the vapor occupies most of the volume of the valve body.
We have now found that this disadvantage may be over-come by the use of the valve assembly shown in Figs. 3 to 7.
In the present device, the high spray rates and desired spray characteristics are obtained by mixing the liquid phase II
with the product phase III which are mixed in the housing of the valve and dispensed in the same ratio as they are charged into the can.
It has been proposed to admix a liquified phase with a non-miscible phase in the prior art such as in U.S. Patent Nos. 3,113,698; 3,260,421; or 3,272,402.
The problems encountered with these systems were that they were complex and expensive. Our inventive valve system accomplishes the admixing of phases II and III by a different principle and by means of a much simpler device.
In Fig. 3 is illustrated an example of a valve and diptube assembly of the present invention.
In addition to all the conventional parts, as in the valve of Fig. 2, this new valve will have an additional diptube 19 which fits on housing 11 at a second tailpiece 20. Diptube 19, closed at the lower end extends to the bottom of container 1. The purpose of this second diptube 19 is to draw liquid phase II into the valve body. Its material of construction is such that it will not allow vapor phase I to permeate through and would preferentially allow liquid phase II to travel through the tube. A silicone treated filter paper can be used. When actuator head 15 of aerosol valve 6 is depressed, the liquid phase II, e.g. a hydrocarbon such as butane travels through permeable tube 19 while the product phase III, e.g. a water-based concentrate goes up the conventional tube 13 which is open at its lower end 21. The phases II and III mix within housing 11 and discharge through the head orifice 17.
As the product is used up, the vapor phase area I, increases. However, since tube 19 does not allow gaseous phase I to pass through, it does not affect the relative use up of the two liqu;d phases II and III. This results in a fine uniform spray which remains constant throughout the life of the can. A vapor tap 18 can be added optio~lly to admit phase I
vapor to aid in draining phases II and III when the unit is not operating. This draining is desirable for optimum performance so that a burst of liquid propellant is not obtianed at any time. The function described above is unlike the use of con-ventional vapor tap described in the prior art when vapor is admitted to enhance mixing. Tube 19 may also be a borosili-cate glass filter tube (Balstron Filter Products). This con-sists of borosilicate glass fibers bonded together with a fluorocarbon cement.
An alternative construction is shown in Fig. 4.
Valve body 6 has a tailpiece 12 and diptube 13. A metal tube 22 having a plurality of perforations 23 is fitted to valve body 11 and surrounds diptube 13. Tube 22 is closed at its lower end by means impermeable to both phases II and III, such as a stopper 24 through which diptube 13 extends, opening into phase III. Tube 22 is wrapped with a material 25 which is permeable to phase II but not phase III, such as a silicone treated filter paper and communicates with valve 6 through propellant tap orifice 20. Actuation of head 15 causes phase III liquid product to enter orifice 21 to diptube 13 and travel upward to valve 6. Phase II liquid propellant perme-ates layer 25 and passes through perforations 23 into the in-terior of tube 22 traveling upward to propellant orifice 20 where it enters the body and admixes with phase III.
In Fig. S, a single diptube 19 permeable only to liquid phase II and open at the lower end is attached to tailpiece 12 of valve 6. In this embodiment, the fluid phase III enters the tube through opening 26 at the lower end of tube 19, while liquid propellant phase II permeates the tube walls, both phases admixing in tube 19 and also within valve 6.
The permeable diptube may be a poro~eric plastic, such as polystyrene, polyethylene, polypropylene, nylon, poly-carbonates~ T~flon* polyvinylchloride. These poromeric mater-ials are characterized by having multidirectional pores throughout the plastic mass. The pore size may vary from about 0.1 to 30 microns and larger and the pore density, the measure of pores per unit area, typically may be 70 percent, but may be lower or higher. The pore size desired will be dependent on a number of factors such as the internal diameter of the tube, the ~iscosity of the fluid concentrate. In one particular application a tube having an internal diameter of l/16 inch was used with a hair spray concentrate having a viscosity of about 7 centistokes. In this instance, the desired pore size is from 1 to 5 microns and the pore density is from about S0 to 70 percent.
The poromeric tube may be prepared by a number of different methods.
In one method, the tube is made by casting of a polymer solution. A solution of polymer in which the compati-~ * Trademark 1.~.17~79 bility of the solute and solvent i5 highly temperature depen-dent is cast or extruded. The solvent separates from the solute to form globules suspended in a polymer - solvent matrix. Removal of the solvent yields a porous material.
Pore size is determined by the solution behavior of the com-ponents used and the rate of cooling of the solution and ranges from .1 microns to 11 microns.
In another method, the tube is made by sintering of plastic beads in molds. Beads of plastic are rounded (made spherical) and sorted for size. The pore size is determined by the bead size and typically ranges from 10 microns to 30 microns and larger with normal techniques but can be made down to .2 microns with special techniques.
A third method for making the diptube is by extrusion of a plastic with starch or salt suspended within.
The starch or salt is removed by extraction in a hot bath.
The starch requires hydrolysis to sugar by including acid in the extraction process. The size of the pores produced is dependent on the size of the salt or starch particles used and ranges from 10 microns downward. A pore density of 70 percent is obtained.
In Fig. 6, a single diptube 27 is provided which is open at the bottom 28 and has one side 29 impermeable to phase II and phase III and side 30 permeable to phase II but impermeable to phase III. The liquid product phase III enters tube 27 through orifice 28, and liquid propellant phase II
enters the tube through permeable wall 30 of the tube.
Fig. 7 is similar to the embodiment of Fig. 6 except that the diptube 31 consists of alternating spiral bands of a material 32 which is permeable to phase II and material 33 not permeable to either phase II or III.
Phase III enters through the open end 34 of tube 31, and phase II propellant enters through material 32.
Following are Examples of formulations which may be dispensed in the inventive container and valve assembly of the present invention.
lil7(J7~1 g Example I
Insecticide % w/w Pyrethrins 0.25 Piperonyl Butoxide 1.25 Fragrance 0.20 Petroleum Distillate 1.25 Deionized Water 67.05 Isbutane 30-00 100.00 Example II
Space Deodorant Perfume 1.50 Deionized Water 73.50 Isobutane 25.00 100.00 Example III
Antiperspirant % w/w Aluminum Chlorhydrol (Water ~;oluble) 15.00 Perfume 0.50 Deionized Water 44.50 Isobutane 25.00 Alcohol 190 Proof 15.00 100.00 ,~....
1117~
Example IV
Deodorant Alcohol 190 Proof 20.00 Perfume 1.50 Deionized Water 53.50 Isobutane 25.00 100 ~ 00 Example V
Hair Spray Alcohol 190 Proof 43.72 Gantrez ES 225 6.00 A.M.P. 0.13 Deionized Water 25.00 Perfume 0.15 Isobutane 25.00 100.00
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Valve and diptube means for a pressurized aerosol container, containing two immiscible liquid phases and a vapour phase therein; said valve and diptube means adapted to simultaneously draw off both liquid phases to said valve means; said diptube means being attached to said valve means at its upper end and having the lower end extending to a point near the bottom of said container, said diptube means comprising means permeable to one of said liquid phases and means to pass the other of said liquid phases, said diptube means being substantially impermeable to said vapour phase.
2. Valve and diptube means for a pressurized aerosol container according to Claim 1, wherein one of said liquid phases is an aqueous hydroalcoholic solution phase and the other liquid phase, immiscible therewith, comprises a liquified hydrocarbon propellant phase.
3. Valve and diptube means for a pressurized aerosol container according to Claim 1, wherein one of said liquid phases is an aqueous or hydro-alcoholic solution, the other liquid phase is a liquid immiscible with the aqueous or hydroalcoholic phase, and the vapour phase is a compressed gas.
4. Valve and diptube means for a pressurized aerosol container according to Claim 3, wherein said compressed gas is carbon dioxide.
5. Valve and diptube means as in Claim 1, wherein said permeable means is a diptube permeable only to said liquid propellant and connected to an orifice in said valve means and closed at its lower end; and said means to pass said other liquid phase is a diptube connected to second orifice in said valve which is open at its lower end and impermeable to said liquid and vapour phases.
6. A valve and diptube means as in Claim 1, wherein said permeable means is a permeable sleeve surrounding an impermeable diptube connecting with said valve means and opening to said valve means and being open at its lower end, and said permeable sleeve being closed at its lower end, said valve means having an opening into the area within said impermeable diptube.
7. A valve and diptube means as in Claim 2, wherein the diptube is a single tube connected to an orifice in said valve means and open at its lower end, at least a part of said diptube wall being permeable to said liquified propellant.
8. A valve and diptube means as in Claim 2, wherein the diptube is a single tube connected to an orifice in said valve means and open at its lower end, said diptube being permeable only to said liquified propellane.
9. A valve and diptube means as in Claim 7, wherein a part of said diptube wall is impermeable to said vapour, liquified propellant phase and solution phase and a part of said wall is permeable only to said liquified propellant phase.
10. A valve and diptube assembly as in Claim 1, wherein comprising in addition an orifice to admit vapour to said valve means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97326178A | 1978-12-26 | 1978-12-26 | |
| US973,261 | 1978-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1117079A true CA1117079A (en) | 1982-01-26 |
Family
ID=25520680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000339292A Expired CA1117079A (en) | 1978-12-26 | 1979-11-06 | Aerosol dispensing system |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5588870A (en) |
| AU (1) | AU530231B2 (en) |
| BE (1) | BE880787A (en) |
| CA (1) | CA1117079A (en) |
| DE (1) | DE2951737A1 (en) |
| FR (1) | FR2445275A1 (en) |
| GB (1) | GB2038954B (en) |
| LU (1) | LU82008A1 (en) |
| NL (1) | NL7908376A (en) |
| ZA (1) | ZA795657B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5339988A (en) | 1992-10-19 | 1994-08-23 | Ballard Medical Products | Disposable tray sump foamer, assembly and methods |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL284447A (en) * | 1961-10-18 | |||
| BE627247A (en) * | 1962-01-25 | 1900-01-01 | ||
| US3272402A (en) * | 1963-12-24 | 1966-09-13 | Revion Inc | Aerosol dispensing apparatus |
-
1979
- 1979-10-23 ZA ZA00795657A patent/ZA795657B/en unknown
- 1979-10-29 AU AU52263/79A patent/AU530231B2/en not_active Expired - Fee Related
- 1979-11-06 CA CA000339292A patent/CA1117079A/en not_active Expired
- 1979-11-12 GB GB7939110A patent/GB2038954B/en not_active Expired
- 1979-11-15 NL NL7908376A patent/NL7908376A/en not_active Application Discontinuation
- 1979-11-23 FR FR7929373A patent/FR2445275A1/en active Pending
- 1979-12-18 LU LU82008A patent/LU82008A1/en unknown
- 1979-12-21 DE DE19792951737 patent/DE2951737A1/en not_active Withdrawn
- 1979-12-21 BE BE2/58290A patent/BE880787A/en unknown
- 1979-12-24 JP JP16697579A patent/JPS5588870A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU530231B2 (en) | 1983-07-07 |
| JPS5588870A (en) | 1980-07-04 |
| NL7908376A (en) | 1980-06-30 |
| GB2038954A (en) | 1980-07-30 |
| BE880787A (en) | 1980-04-16 |
| FR2445275A1 (en) | 1980-07-25 |
| ZA795657B (en) | 1980-10-29 |
| GB2038954B (en) | 1983-03-23 |
| AU5226379A (en) | 1980-07-03 |
| LU82008A1 (en) | 1980-04-23 |
| DE2951737A1 (en) | 1980-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |