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
  • B65D83/60—Contents and propellant separated
  • B65D83/66—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head
  • B65D83/663—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head at least a portion of the propellant being separated from the product and incrementally released by means of a pressure regulator

Definitions

• PROCESS FOR MAKING AN EXTEMPORANEOUS MIXTURE OF AT LEAST TWO COMPONENTS, LIQUID OR PASTY, AND PRESSURIZED CAN FOR IMPLEMENTING SUCH A PROCESS.
• the invention relates to a method for producing an extemporaneous mixture of at least two components, liquid or pasty, kept in storage in closed compartments, isolated from each other, the first component being placed in a container intended to be pressurized with a propellant gas, container in which is placed a capsule of the capsule type ensuring replenishment of propellant gas.
• Refeeding capsules are known from EP-A-0 349 053 and EP-A-0 446 973.
• a capsule comprises a chamber intended to receive a fluid under relatively high pressure, a valve provided in a wall of said chamber , valve control means suitable for causing the valve to open and for allowing the outlet of pressurized fluid when the capsule is in an environment at a pressure below a reference value corresponding to the operating pressure of the aerosol can.
• the control means of the valve when the capsule is not put into service, are isolated from the surrounding pressure, by a fusible plug at low temperature, or likely to dissolve in the liquid in the aerosol can. The fusion, or the dissolution of this plug ensures the putting into service of the capsule.
• the valve comprises a rod which occupies a first closed position, when the capsule is not in use and the surrounding pressure is less than the pressure of reference; for putting the capsule into service, the rod is passed into a second closed position obtained when the surrounding pressure is greater than the reference pressure.
• the valve opens and allows an outlet of pressurized gas from the capsule chamber.
• the putting into service of the capsule is accompanied by a passage, for a time reduced, of the valve by its open position located between the two closed positions, and by a minimal exhaust of pressurized gas.
• Such capsules are used to pressurize an aerosol can and ensure the replenishment of propellant, inside the can, as and when the aerosol can is used.
• the regulation is ensured by the control means of the valve which let out gas under pressure, coming from the capsule, to restore the desired pressure inside the aerosol can.
• the invention relates to the application of a capsule of this type to the production of an extemporaneous mixture of at least two components, in a pressurized container.
• oxidation dyes for the hair.
• a first component consisting for example of a mixture of oxidation dye in an ammoniacal medium in a support
• second component consisting of a solution of hydrogen peroxide.
• the object of the invention is, above all, to provide a method for producing an extemporaneous mixture of at least two liquid or pasty components, as defined above, which makes it possible to obtain the mixture, in a simple and rapid manner, in a pressurized container.
• a method for producing an extemporaneous mixture of at least two liquid or pasty components, stored during storage in closed compartments, isolated from each other, the first component being placed in a container intended to be pressurized with a propellant gas, container in which is placed a make-up capsule comprising a chamber intended to receive a fluid under relatively high pressure, a valve provided in a wall of said chamber, and means for controlling the valve according to the value of the surrounding pressure relative to a reference pressure, is characterized by the fact:
• the user causes, by actuating the dispensing head of the pressurized container, a drop in the pressure of the propellant gas in the container, which is placed in a position such that only propellant gas leaves the dispensing head, which causes the opening of the capsule valve, the exit of the liquid or pasty component contained in this capsule, and its mixing with the component of the container.
• the capsule comprises a valve provided with a rod capable of occupying two distinct closing positions corresponding respectively to an surrounding pressure of the order of atmospheric pressure and a surrounding pressure at least equal to the operating pressure of the container, the passage from one position to the other being effected by a transient position for opening the valve.
• the capsule is arranged with the valve at the bottom and the rod facing upwards, so that the liquid contained in this capsule is expelled at the time of the extemporaneous mixing.
• the capsule may be of the type with a fusible plug or soluble in a surrounding liquid, for the purpose of commissioning.
• the container can be of the dip tube type; at the time of extemporaneous mixing, the user places the canister upside down and presses the push-button so as to let the propellant escape from the canister.
• the container can be devoid of dip tube and be intended to be used upside down; at the time of mixing extemporaneous, the user holds the canister upside down and presses on the dispensing head to let out the propellant gas, and cause the mixing, and then, when the mixing has been carried out and stirred, the user returns the canister for use upside down and product distribution.
• each capsule may include a component intended to be mixed with the component of the container.
• the container comprises two capsules, one of which is intended solely to supply one of the liquid components of the mixture and the other of which contains only gas under pressure and is intended to maintain the pressure of the container, in particular during storage.
• the invention also relates to a pressurized container for implementing the method.
• the container contains a first component, liquid or pasty, pressurized with a propellant gas, and a make-up capsule comprising a chamber intended to receive a fluid under relatively high pressure, a valve provided in a wall of said chamber and means for controlling the valve according to the value of the surrounding pressure relative to a reference pressure, the container being characterized in that the capsule placed inside contains, in the chamber under relatively high fluid pressure, a second liquid component or pasty intended to be mixed with said first component, the assembly being such that, for storage, the pressure of the propellant gas is sufficient to keep the valve closed so that the component of the capsule remains separated from said first component, while at the time of use, a drop in pressure caused by the propellant gas in the container makes it possible to empty the capsule of its compound ant liquid and make the mixture.
• the container can contain several capsules, in particular two refilling capsules, each capsule containing a different liquid component, to make a mixture with three components.
• the container can contain two refilling capsules, one of which contains the second liquid component and the other of which contains only pressurized gas, to ensure the refilling of the container in the event of light leaks during storage, the reference pressure of the second capsule being slightly higher than that of the first capsule.
• Figure 1 of these drawings is a schematic axial vertical section of a pressurized container made according to the invention for preparing extemporaneously a mixture of two liquid or pasty components kept in storage isolated from each other.
• Figure 2 is a sectional diagram, similar to that of Figure 1, showing a pressurized container for making an extemporaneous mixture of three components.
• Figure 3 is an axial section of an alternative embodiment of two make-up capsules each containing a different component.
• FIG. 4 illustrates a phase of manufacturing the container after the refilling capsules have been placed in the container, before the container is pressurized.
• Figure 5 is a vertical axial section of the pressurized container manufactured, can be stored.
• FIG. 6, finally, represents the container of FIG. 5 at the moment when the operator has produced the extemporaneous mixture, with a view to its use.
• a pressurized container 1 equipped with a dispensing head with push button 2, this container being provided with a dip tube 3 extending to the vicinity of the bottom of the container.
• the container 1 contains a liquid or pasty component S, constituted for example by a mixture of products.
• the component S is under pressure of a gas 4 which overcomes the liquid S inside the container 1.
• the initial pressure of the gas 4, before any distribution of the product S, is sufficient to ensure good distribution, in particular good spray. This pressure can be greater than 7.10 5 Pa and be of the order of 8.10 5 Pa.
• the container 1 also contains a replenishment capsule 5 of the type described in EP-A-0 446 973.
• the container 5 is maintained in the desired vertical position, valve down, inside the container 1, by means of holding means 6 cooperating with the internal wall of the container 1.
• the capsule 5 will be described briefly; for more details, it is sufficient to refer to EP-A-0 446 973.
• the capsule 5, of generally cylindrical shape comprises a chamber 7 intended to receive a gas 8 under a high pressure, for example greater than 30 ⁇ 10 5 Pa , significantly higher than the initial gas pressure 4.
• the chamber 7 is closed, on one side by an outwardly convex end 9, and, at its other end, by a transverse wall 10 provided with a central opening 11 equipped with an O-ring 11a suitable for cooperating with the rod 12 of a valve.
• the cylindrical wall of the chamber 7 has an opening 13 intended for filling the chamber 7, an opening which is then closed by a plug 14 when the filling has been ensured.
• Another chamber 15 is provided at the other axial end of the capsule 5.
• This chamber 15 is between the bottom 16 of the capsule 5 and a deformable transverse wall 17 constituted for example by a membrane.
• An opening 18 is provided in the cylindrical wall of the chamber 15 for filling it with gas, this opening 18 then being closed by a plug 19.
• the membrane 17 carries, at its center, the valve stem 12.
• This rod 12, oriented along the axis of the capsule, is substantially orthogonal to the membrane 17.
• the gas introduced into the chamber 15 is put under a reference pressure which is slightly lower than the initial pressure of the propellant gas in the canister 1 In the example considered, the reference pressure in the chamber 15 is of the order of 7.10 5 Pa while the initial pressure of the propellant in the container 1 is of the order of 8.105 Pa.
• the membrane 17 is located at a certain distance from the wall 10 so as to determine a volume or intermediate chamber 20 which communicates, through an orifice 21, provided in the cylindrical wall of the capsule 5, with the space surrounding this capsule.
• the rod 12, towards its end remote from the membrane 17 has a recess 22 in the form of a diabolo, that is to say in the form of two frustoconical surfaces connected by their small base.
• the capsule 5 and the valve formed by the rod 12, the membrane 17 and the central opening 11 provided with the seal 11a, are arranged so that:
• the rod 12 closes the opening 11 by its end located beyond the clearance 22 relative to the membrane 17, which corresponds when capsule 5 is put into service.
• the capsule 5 is held in the container 1, by the means 6, with its axis substantially parallel to the axis of the container 1, the chamber 7 being turned towards the side of the push button 2 while the chamber 15 faces the bottom of the container 1.
• a second liquid or pasty component A is introduced into chamber 7 of the capsule before this chamber is pressurized with gas 8 and closed by the plug 14.
• the opening 13 is remote from the wall 10, and relatively close to the bottom 9 so as to be located above the level of the liquid A.
• the chamber 7 contains two phases, a liquid corresponding to the component A, and a gaseous phase corresponding to the gas 8 for refilling the can 1 with propellant gas.
• Chamber 15 is brought to the reference pressure.
• the rod 12 is in the storage position, defined above.
• the capsule 5 is placed in the container 1 containing the liquid mixture S.
• the container 1 is then closed and pressurized with propellant gas 4, for example by injection through the push button 2.
• the pressurization of the container 1 causes the intermediate chamber 20 to be pressurized so that the membrane 17 deforms and the rod 12 passes into the closed position of the opening 11 by its end remote from the membrane 17.
• the capsule 5 is placed in service.
• the can 1 can be stored, the components A and S being isolated from each other.
• the operator wishes to carry out the mixing of components A and S for immediate use of the mixture, for example in an aerosol if the viscosity of the mixture is that of a liquid
• the following operations are carried out.
• the operator turns the can 1 so that the push button 2 is located at the bottom and the end of the tube 3 is in the area occupied by the propellant 4.
• the operator presses the push-button 2 so as to escape a certain quantity of propellant gas 4 from the container 1, for a sufficient time, for example around 5 seconds.
• This gas leak 4 causes a pressure drop inside the container 1 and the intermediate chamber 20 of the capsule.
• the valve formed by the rod 12 and the opening 11 has opened and the liquid A, which is located at the bottom of the chamber 7, flows through the opening 11 into the chamber 20 and, through the opening 21, into the can 1 to mix with the component S.
• the liquid product A empties completely into the can 1. It should be noted that the volume of liquid A is small compared to the volume occupied by the gas 4 in the can 1. In other words, the complete emptying of the liquid A is insufficient for cause a rise in pressure in the container 1 which would cause the valve to close before the liquid A is completely drained.
• the mixture of liquids A and S can be improved by shaking the can 1, which is then ready for use.
• Canister 1 is used in the head-up position.
• the operator By pressing the push-button 2, the operator causes the exit of the mixture S and A pushed by the propellant gas 4, through the dip tube 3 and a spray nozzle.
• gas is replenished by the capsule 5, in a known manner. It is clear that with the process of the invention it is possible to carry out an extemporaneous mixing of a number of components greater than two.
• a pressurized container 101 arranged to allow the production of an extemporaneous mixture of the liquid component S contained in the container 101 with two other liquid components A and B introduced respectively at l inside a capsule 5 and a capsule 105, both placed inside the container 101, on either side of the dip tube 103 substantially coaxial with the container.
• the preparation of the capsule 105 is carried out in the same manner as that which had been described in connection with the capsule 5 with the only difference that the liquid component B is introduced into the chamber 107 of the capsule 105.
• the container 101 During storage, the container 101 is kept in an upright position, head up, and the liquid components S, A and B are isolated from each other.
• the procedure is as described above, that is to say that the canister 101 is turned upside down and the pressure of the propellant gas in this canister is lowered 101, by pressing the push-button 102, for a sufficient time, of the order of 5 seconds.
• the container 101 is then replaced in its normal head-up position, and the capsules 5, 105 completely drain of their liquids A, B which mix with the component S, a mixture which can be favored by agitation of the container 101.
• the the assembly is then ready for use for spraying in the form of an aerosol of the mixture if it is a fluid liquid, or for distribution under pressure if it is a paste or cream.
• the mixture is to be produced between two components only, for example between S and A, as illustrated in FIG. 1, it is possible to provide a second capsule such as 105, devoid of liquid component, and serving only as a gas reservoir to compensate for any gas losses during storage.
• the reference pressure in the chamber 115 of the capsule 105 would be chosen to be slightly higher than the reference pressure of the chamber 15 in the capsule 5.
• FIGS. 3 to 6 illustrate the implementation of the method of the invention with two refeeding capsules 205a, 205J2 of the type of those described in EP-A-0 349 053.
• the two capsules 205a, 20512 are identical and it will suffice to briefly describe capsule 205a.
• the difference between the capsule 205a and the capsule 5 is located at the level of the arrangement of the valve 212 constituted by a kind of valve returned by a spring in the closed position.
• the opening 221 of the chamber 220 is closed, during storage of the capsule 205a in the open air, by a plug 23 made of a material capable of melting at a relatively low temperature, or capable of dissolving in the liquid component S of the can 201.
• the closed chamber 220 is at a sufficient pressure, slightly higher than the reference pressure of the chamber 215 (for example if the reference pressure in the chamber 215 is 7.10 5 Pa, the pressure in the chamber 220 is of the order of 8.10 5 Pa). Under these conditions, the membrane 217 remains sufficiently spaced from the stem of the valve 212 so as not to cause it to open.
• the membrane 217 takes a convex shape in the direction of the wall 210 and pushes back the stem of the valve 212 which opens as illustrated in FIG. 6.
• the membrane 217 When the pressure in the chamber 220 rises, the membrane 217 returns substantially in a plane, which allows the valve 212 to close.
• the chamber 207 of the capsule 205a not only contains gas 208 under high pressure , but also a liquid component A.
• the capsule 205b has a chamber 207 which contains a liquid component B in addition to the make-up gas.
• the capsules 205a and 205b are introduced into the container and are held by means 206 in the illustrated position, that is to say chamber 207 facing upwards. and chamber 215 in the lower position, the lower part of these capsules being immersed in the liquid component S.
• the can 201 is then closed and pressurized with propellant gas to a sufficient initial value, for example 8.10 5 Pa when the pressure of reference in the chamber 215 is 7.105 Pa.
• the plugs 23 are made of a material soluble in the liquid component S so that after a certain time, after conditioning of the container 201, the openings 221 of the capsules 205a , 205k are released.
• the pressure prevailing in the can 201 corresponding substantially to that which prevailed in the chamber 220 during storage, the membrane 217 of each capsule remains in its planar position and the valves 212 remain closed as illustrated in FIG. 5.
• the can 201 which does not have a dip tube and which is intended to be used upside down, is stored in the head up position illustrated in FIG. 5.
• the components S, A and B remain separated from each other.
• the membranes 217 deform according to the convex configuration of FIG. 6 and push back the stem of each valve 212 which opens.
• the liquid components A and B are drained and mix with the liquid component S.
• the user by shaking the can 201, promotes this mixing.
• part of the make-up gas contained in these chambers passes through the valve 212 and raises the pressure in the can 201 and in the chamber 220 until the valves close 212.
• the can 201 is ready to use, the extemporaneous mixture S + A
• the user turns the can 201 upside down and presses the button 202.
• the process of the invention is particularly suitable for oxidation dyes.
• the liquid component S can consist of a mixture of oxidation dyes in an ammoniacal medium in a support.
• component A can be a solution of hydrogen peroxide.
• the S + A mixture corresponds to the oxidation dye, which may be in the form of a cream, a gel or a foam.
• component S can be a mixture of oxidation dyes in a support, component A a solution of hydrogen peroxide, and component B a reserve ammonia.
• the method of the invention and the pressurized container for the implementation of this method, can be used for many applications involving extemporaneous mixtures, for example in the capillary field, in particular that of the perm, in the field of make-up, in the field of care of the skin, in the household or industrial field, in particular for glues, mastics or foams, for paints.

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• 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)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9428671

Family Applications (1)

Country Status (8)

Families Citing this family (23)

Family Cites Families (13)

• 1992
  • 1992-04-09 FR FR929204341A patent/FR2689866B1/fr not_active Expired - Fee Related
• 1993
  • 1993-04-06 CA CA002110584A patent/CA2110584A1/fr not_active Abandoned
  • 1993-04-06 WO PCT/FR1993/000347 patent/WO1993021085A1/fr active IP Right Grant
  • 1993-04-06 DE DE69301649T patent/DE69301649T2/de not_active Expired - Fee Related
  • 1993-04-06 US US08/157,032 patent/US5439137A/en not_active Expired - Lifetime
  • 1993-04-06 ES ES93909000T patent/ES2083856T3/es not_active Expired - Lifetime
  • 1993-04-06 EP EP93909000A patent/EP0589029B1/de not_active Expired - Lifetime
  • 1993-04-06 JP JP51803893A patent/JP3299750B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

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