EP2616182A1 - Improved foaming compositions and aerosol dispensers - Google Patents

Improved foaming compositions and aerosol dispensers

Info

Publication number
EP2616182A1
EP2616182A1 EP11761109.5A EP11761109A EP2616182A1 EP 2616182 A1 EP2616182 A1 EP 2616182A1 EP 11761109 A EP11761109 A EP 11761109A EP 2616182 A1 EP2616182 A1 EP 2616182A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cap assembly
aerosol canister
aerosol
surface treatment
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.)
Withdrawn
Application number
EP11761109.5A
Other languages
German (de)
French (fr)
Inventor
Lauren Giovinco
William Mario Lenzetti
Alex Sandor Szekely
Juraj Ulik
Dawn Walsh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reckitt Benckiser LLC
Original Assignee
Reckitt Benckiser LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Reckitt Benckiser LLC filed Critical Reckitt Benckiser LLC
Publication of EP2616182A1 publication Critical patent/EP2616182A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/044—Slits, e.g. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/16—Actuating means
    • B65D83/20—Actuator caps
    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/16—Actuating means
    • B65D83/20—Actuator caps
    • B65D83/206—Actuator caps comprising cantilevered actuating elements, e.g. levers pivoting about living hinges
    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/141—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant specially adapted for specific contents or propellants

Definitions

  • the present invention relates to improved aerosol dispensers and foaming compositions dispensed therefrom which provide improved delivery characteristics.
  • a surface such as a hard surface and particularly a non-horizontal inclined or vertical hard surface
  • unsatisfactory amounts of "bearding" imdesired buildup or residue of dispensed foamed treatment composition on the dispenser, typically
  • the ail has recognized that careful consideration of the constituents and formulation of the treatment compositions as well as the propellent used to drive or expel the treatment compositions from the container or can of the aerosol dispenser must be undertaken, and further that the performance characteristics and geometry of the dispenser, particularly the nozzle or nozzle assembly must also be carefully undertaken in order to reduce or eliminate one or all of the undesired product delivery characteristics noted above.
  • the present invention provides for an improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface treatment composition. in another aspect the present invention provides for an improved aerosol dispenser having a specific improved. nozzle assembly configuration, and a pressurized foaming glass and/or shiny or polished hard surface treatment composi tion.
  • the present invention provides an improved aerosol dispenser having a specific improved nozzle assembly configuration which provides improved product delivery characteristics in the delivery of a pressurized foaming hard surface treatment composition contained within the said improved aerosol dispenser.
  • the present invention relates to aerosol dispenser having a speci fic improved nozzle assembly configuration which provides improved product delivery characteristics in the deli very of a pressurized foaming surface treatment composition contained within the said improved aerosol dispenser, wherein the said aerosol dispenser overcomes one or more of the following technical shortcomings: (a) poor directional control of the dispensing treatment compositions; (b) poor or reduced foaming of the surface treatment compositions when applied to a surface, such as a hard surface and particularly a non-horizontal inclined or vertical hard surface: (c)
  • the present invention provides for an improved method for the delivery or dispensing of a foaming surface treatment composition from a pressurized, aerosol dispenser which process comprises the step of; supplying an aerosol dispenser ha ving a specific impro ved nozzle assembly configuration which also contains a quantity of the pressurized, foaming surface treatment composition, and, dispensing the foaming surface treatment composition through the foaming surface treatment composition and onto a surface, such as a hard surface and/or a soft, surface.
  • improved methods tor the treatment of glass and/or shiny or polished hard surfaces which methods include the steps of: providing an aerosol dispenser having a specific improved nozzle assembly configuration as described according to any prior aspect of the invention or otherwise as depicted on one or more of the figures, and thereafter, dispensing a cleaning effective amount and/or surface treating effective amount of a pressurized glass and/or shiny or polished hard surface treatment composition from the dispenser onto the said surface in need of treatment, and thereafter optionally wiping and/or rinsing the treated hard surface.
  • the aerosol dispenser having a specific improved nozzle assembly configuration which provides improved product delivery characteristics in the delivery of a pressurized foaming surface treatment composition is expected to be useful with a variety of formulations of foaming surface treatment compositions, and with a variety of propellants.
  • Such may include one or more of: surfactants, sol vents including organic solvents, water, chelating agents, corrosion inhibitors, pH adjusting agents such as acids and/or bases, pH buffers including inorganic and organic pH buffer compositions, fragrances, colorants such as dyes, as well as other conventional constituents known to the art.
  • High foaming surfactants are preferred.
  • the propellants used to pressurize the foaming surface treatment composition may be any which are conventionally used in the art.
  • Propellants which may be used include, for example, a hydrocarbon, of from 1 to 10 carbon atoms, such as n-propane, n- butane, isobutane, n-pentane, isopentane, and mixtures thereof; dimethyl ether and blends thereof as well as individual or mixtures of chloro-, chlorofluoro- and/or
  • HCFCs fluorohydrocarbons- and/or hydrochlorofluorocarbons
  • useful commercially available compositions include A-70 (Aerosol compositions with a vapor pressure of 70 psig available from companies such as Diversified and Aeropress) and Dymel® 152a ( 1,1-difluoroethane from DuPont). Compressed gases such as carbon dioxide, compressed air, nitrogen, and possibly dense or supercritical fluids may also be used.
  • the propellent will generally be in an amount of from about 1% to about 50% of the total formulation as contained within the aerosol canister, with preferred amounts being from about 2% to about 25%, more preferably from about 5% to about 15%.
  • Non-limiting examples of preferred foaming surface treatment compositions which may be used with the specific improved nozzle assembly and aerosol dispenser include those according to the following general formula:
  • a suitable amount e.g., I - 25%wt. of an approp riate propellent
  • the foaming surface treatment composition is dispensed by activating the specific improved nozzle assembly of the aerosol dispenser onto the area in need of treatment, and in accordance with this manner, the above-described the area is treated (e.g., cleaned and/or sanitized and/or disinfected).
  • the improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming surface treatment composition may be used to intermittently dispense the said treatment composition when needed by a consumer, and in the interval therebetween may be used as a storage container.
  • the improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface and/or soft surface treatment composition may be a vendible product.
  • the improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface composition may be used to dispense the said treatment composition onto hard surfaces to provide a treatment benefit thereto.
  • hard surfaces include: surfaces composed of refractory' materials such as: glazed and unglazed tile, brick, porcelain, ceramics as well as stone including marble, granite, and other stones surfaces; glass; metals; plastics e.g. polyester, vinyl; fiberglass, Formica®, Corian®, and other hard surfaces known to the industry. Further hard surfaces which are to be denoted are those associated with kitchen environments and other environments associated widi food preparation, including cabinets and counteitop surfaces as well as walls and floor surfaces.
  • Still further hard surfaces include those associated with medical facilities, e.g., hospitals, clinics as well as laboratories, e.g., medical testing laboratories.
  • the improved dispenser, nozzle assembly and foaming hard surface treatment composition is particularly useful in the treatment of lavatory surfaces, e.g., lavatory fixtures such as shower stalls, bathtubs and bathing appliances (racks, curtains, shower doors, shower bars) toilets, bidets, wall and flooring surfaces (including painted surfaces).
  • the said aerosol dispenser is used to dispense a pressurized foaming glass and/or shiny or polished hard surface treatment composition to a glass surface (e.g., window, glass door, mirror), and/or a shiny or polished hard surface (e.g., metal surface including polished and unpolished metal surface, such as a matte finished metal surface, countertop, tabletop, glazed ceramic surface, enameled surface, and the like).
  • a glass surface e.g., window, glass door, mirror
  • a shiny or polished hard surface e.g., metal surface including polished and unpolished metal surface, such as a matte finished metal surface, countertop, tabletop, glazed ceramic surface, enameled surface, and the like.
  • Inclined surfaces viz.
  • those which are not horizontal such as a vertical glass surface, such as a mirror, window pane, glass door, or the interior of a bathtub, bathtub surround, shower stall, the interior of a sink especially a lavatory sink, are particularly advantageously treated with the improved dispenser, nozzle assembly and foaming hard surface treatment composition described herein.
  • a pressurized foaming surface treatment composition particularly useful in the treatment of glass and/or shiny or polished hard surfaces comprises the following constituents:
  • a cap assembly which comprises a specific improved nozzle assembly configuration (as described with reference to the drawings) was thereafter affixed to the upper end of the sealed aerosol canister such that the valve stem engaged a part of the improved nozzle assembly which was thereafter used to dispense Ihe pressurized foaming surface treatment composition.
  • the interior pressure canister of the pressurized foaming surface treatment composition was in the range of about 48 - 55 psi (at 20°C).
  • composition "E l" is directed to a preferred embodiment, bui not to a sole embodiment of a surface treatment composition useful in (he improved aerosol dispenser having a specific improved nozzle assembly configuration described herein.
  • the cap assembly forms part of an aerosol dispenser which also includes at least a canister, can or container which is used to contain a quantity of the pressurized foaming surface treatment composition, especially preferably the pressurized foaming hard surface treatment composition which provides excellent cleaning of glass and/or shiny or polished hard surfaces, with little or no residue or little or no surface streaking, as disclosed above.
  • Figure 1 depicts a perspective view of the cap assembly 10 which includes the said specific improved nozzle assembly configuration
  • Figure 2 depicts the same in a cross-sectional elevation view, further illustrating the cap assembly 10 mounted on an aerosol canister 100 and in engagement with the valve stem 104.
  • the cap assembly 10 includes two parts, a cowling 15 having a moveable trigger arm 20 which at its proximal end 22 extends from the base skirt 17 of the cowling 15, and a distal end 24 which supports and preferably includes an integral part of the improved nozzle assembly configuration 50.
  • a second part of the cap assembly 10 is a nozzle orifice insert 70 which is also part of the improved nozzle assembly configuration 50.
  • the forward end of the nozzle orifice insert 70 includes a horn 71 opening upwardly in the downstream direction, and a nozzle orifice 80 at or near the end of a nozzle post 82.
  • the improved nozzle assembly configuration 50 includes ait inlet conduit 52 which has an upwatxJly directed bore 54 and near the base thereof, a flanged section 56 which provides tor engagement between the valve stem 104 and the inlet conduit 52. If the opposite end of the bore 54 and extending perpendicularly therefrom is further connecting bore 58 connecting the vertical bore 54 with the nozzle chamber 60.
  • the pressurized foaming treatment composition exits via the valve stem 104 and then flows outwardly through the vertical bore 54 of the inlet conduit 52, and next is redirected and passes through the connecting bore 58 connecting the vertical bore 54 with the nozzle chamber 60.
  • the cross-sectional area and/or the diameter of the connecting bore 58 is less than the cross-sectional area and/or die diameter of the vertical bore 54.
  • the respective ratios out of these cross-sectional areas and/or diameters is between 1 :1.1 -5.
  • a shown in Fig. 2 are a series of support buttresses 110 within the hollow interior 105 of the cap assembly 10. When present, such support buttresses 110 provided degree mechanical stifihess to the cap assembly 10.
  • Figures 3 and 4 respectively depict a side cross sectional view of a detail of the unproved nozzle assembly configuration 50 as well as parts of the cap assembly 10, and a top cross-sectional view of a detail of the improved no/zle assembly configuration, as well as parts of the cap assembly 10.
  • the nozzle assembly configuration 50 includes a nozzle chamber 60 having an open end defined by the transverse gap coincident with an end wall 62, a chamber body 64 extending from the end wall 62 towards the interior of the cap assembly 10 and the connecting bore 58 and terminating at a base wall 66.
  • a center line "AX" coincident with the central axis of the ' chamber 60, as well of the center post 69 is also shown.
  • a portion of the nozzle orifice insert 70 namely an insert sleeve part 72 is inserted, preferably by a sealing, friction type fitting engagement between the sleeve part 72 and a part of the inner sidewall 63 of the chamber body 64.
  • any pressurized foaming treatment composition and entering the nozzle chamber 60 from the connecting bore 58 may only exit therefrom by passing downstream towards, and outward from the nozzle orifice 80.
  • the pressurized foaming treatment composition passes in the downstream direction, between the connecting bore 58 and a nozzle orifice 80 it is further compressed.
  • a part of the sleeve part 72 of the nozzle orifice insert 70 includes a first generally cylindrical inlet zone 73 upstream of the nozzle orifice 80, and adjacent thereto and downstream therefrom a compression zone 75.
  • the compression zone 75 is funnel shaped, and includes an upper tapered sidewall 77a and opposite thereto, a lower tapered sidewall 77b, which extend between two generally parallel flat vertical sidewalls, 78a, 78b which funnel shaped section of the compression zone 75 causes further compression of the foaming surface treatmen t composition passing from the inlet zone 73 through the compression zone 75 prior to exiting via the nozzle orifice 80.
  • portions of the nozzle insert 70 include two inwardly directed side restrictions 65a, 65b which are dimensioned to define a gap therebetween which gap is sized to engage the center post 69 which extends within the nozzle chamber 60 and depends from and extends perpendicularly from the base wall 66 of the chamber body 64.
  • the center post 66 is of a length which is of sufficient length to extend inwardly into the sleeve part 72 of the nozzle orifice insert 70 so to engage the two side restrictions 65a, 65b of the cylindrical inlet zone 73 and preferably not so far as to attend into, the compression zone 75.
  • distal tip end 69a of the center post 69 is frustoconical in shape.
  • the exit orifice 80 has a rectangular cross-section with the two opposite wider sides 81a, 81b being coincident with the respective upper tapered sidewall 77a and opposite thereto, a lower tapered sidewall 77b.
  • the exit orifice 80 opens into a bowl-shaped hom 88 immediately adjacent thereto, which can be formed by a chamfer 84 extending outwardly from a least the wider sides 81 a, 8 lb of the exit orifice 80, were preferably but very advantageously a chamfer extends outwardly from a wider sides, as well as the nanower sides 83a, 83b of die exit orifice 80.
  • the ratio of the wider length sides 81a, 81b of the rectangular shaped exit orifice 80 to the shorter length sides 83a, 83b is at least 1 :1 preferably at least 1.2:1, yet more preferably is at least 4-1.2:1 , and especially preferably is in the range of 3.5-2:1. Particularly preferred ratios may be derived from the Figures, particularly from Figs. 8 and 9.
  • the depicted embodiment of the cap assembly 10 which includes the said specific improved nozzle assembly configuration is believed to be optimized for the delivery of the specific composition of E1 at the indicated internal pressures disclosed above.
  • the indicated configuration and dimensions of the improved nozzle assembly configuration can be readily derived from the accompanying figures.
  • the dimensions illustrated on Fig. 10 demonstrate particularly preferred dimensions, (in Fig. 10, the indicated dimensions are in millimeters). It is nonetheless expected that the indicated dimensions may be slightly varied * e.g., by +/- 10%, preferably by not more than about +/- 10% from the indicated dimensions of angles and lengths, in this particularly preferred embodiment.
  • the exit orifice 80 may be a rectangularly shaped exit orifice having a "height " (corresponding to the distance between opposite sides 81a, 81b) of 0,4 mm +/- 0.1 mm and wherein these opposite sides 81 a, 8 lb are straight parallel sides as illustrated in Figs. 1 - 8.
  • the exit orifice 80 has a "width" (corresponding to the distance between opposite sides 83a, 83b) of 1 - 1.5 mm +/- 0.1 mm, but is preferably between about 1.2 - 1.4 mm +/- 0.1 nun, and especially preferably is 1 ,3 mm +/- 0.1 mm, and also, wherein these opposite sides 83a, 83b are straight parallel sides as illustrated in Figs. 1 - 8. Alternately, as illustrated on Fig.
  • the exit orifice 80 may be a rectangularly shaped exit orifice having a "height " (corresponding to the distance between opposite sides 81a, 81 b) of 0.4 mm +/- 0,1 mm at its ends, which however may extend at the midpoint between the ends to 0.45 - 0.5 +/- 0.1 , such that these sides 8t a, 8 lb are slightly concave or bowed outwardly from the line AX.
  • the exit orifice 80 has a "width" (corresponding to the distance between opposite sides 83a, 83b) of 1 - 1.5 mm +/- 0.1 mm, but is preferably between about 1.2 - 1.4 mm +/- 0.1 mm, and especially preferably is 1.3 mm +/- 0.1 mm, and also, wherein these opposite sides 83a, 83b are straight parallel sides as illustrated in Fig. 9, however, although not illustrated in Fig. 9 the opposite sides 83 a, 83b can also be slightly concave or bowed outwardly from the line AX as well by up to about 0.1 mm at their midpoints.
  • the angle between 77a, and 77b is between 25 - 35 degrees of arc (°), preferably is 30° +/1 °; the angle of the hom 84, or alternately the angle between the midpoint of a reference plane between sides 81a, 81b and the exterior edges of the hom 84 is between 1 15 - 140°.
  • the angle of the nozzle horn sidewalls 70a, 70b is between 70 - 95°, preferably between 80 - 90°, and is especially preferably about 85° +/- 0.5° as measured along a vertical line bisecting sides 81a, 81b of the nozzle orifice 80;
  • the distance between the end of the plug 69c and the end of the outlet orifice 80 is between 4.5 and 5.5 mm, preferably is 5 mm +/- 0.2 mm;
  • the diameter of the plug 69 is between 2.5 - 2.8 mm, preferably is 2.7 mm +/- 0.15 mm, the maximum inner diameter of the insert is between 3,2 - 3.6 mm, preferably is 3.4 mm +/- 0.1 mm.
  • the initiation of foaming via rapid air en trainmen t as the sprayed dispensed aerosol foaming surface treatment composition exhibits increased foaming as it transits through the ambient air even prior to its deposition on a surface.
  • the sharp edges of at least two opposite sides of the exit orifice 80 e.g., 81 a, 81 b immediately followed by the chamfer or bowl shaped horn 88 imparts turbulence to the exiting composition, and the chamfer or bowl shaped horn 88 permits tor immediate volumetric expansion of the exiting composition and capture of air, hence air entrainment at even the initial stages of its flight through ambient air or the ambient environment.
  • This effect is noted with the exit orifice configuration according to Fig. 8, and even moreso with the exit nozzle configuration according to Fig. 9.
  • a plurality of pressurized aerosol dispensers were prepared by providing 530 grams of formulation of "E1" to an aerosol canister (optionally lined to reduce internal can conrosion), thereafter adding 43 grams of a liquefied gas propellent, thereafter the canister was sealed by the installation of a conventional aerosol crimp cap having at one side a dip tube which extended downwardly and into the interior of the aerosol canister and thus into the pressurized foaming surface treatment composition, an intermediate valve and on the exterior a valve stem.
  • a cap assembly as depicted on Figs. 1 - 7 and 10 was thereafter affixed to the upper end of the sealed aerosol canister such that die valve stem engaged a part of the improved nozzle assembly as shown in Fig. 2.
  • the interior pressure canister of the pressurized foaming surface treatment composition was in the range of about 48 - 55 psi (at 20°C).
  • Each of the pressurized aerosol dispensers (10 replicates) was tested for the delivery characteristics of the foaming treatment composition which they contained according to the following protocol.
  • An aerosol dispenser was held in a vertical position * 30 cm away from a parallel vertical wall upon which had been taped a sheet of brown paper (kraft paper).
  • the foaming surface treatment composition was dispensed by depressing the moveable trigger arm 20 for about 1 - 5 seconds, (corresponding to a spray rate of 4.7 grams/second) after which pressure was removed from the moveable trigger arm 20.
  • the applied foamed treatment composition was thereafter measured for the height of the deposited sprayed foamed surface treatment composition, and the canister was visually inspected.
  • the deposited sprayed foamed surface treatment compositions for the 10 tested aerosol dispensers were approximately 38 cm in height as measured on the sheet of brown kraft paper held vertically on the wall.
  • the visual density of the applied deposited sprayed foamed surface treatment compositions appeared to be uniform and dense, which are particularly importance attributes from a consumer standpoint.

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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)

Abstract

Provided is a cap assembly (10) mounted upon an aerosol canister (100), wherein the cap assembly ( 10) includes a moveable trigger aim (20) bearing a nozzle assembly (50), the nozzle assembly (50) which includes a nozzle orifice insert (70) which includes a sleeve part (72) and a nozzle orifice (80.) inserted within chamber body (64) having a nozzle chamber (60), wherein the sleeve part (72) includes an inlet zone (73) and downstream thereof, a compression zone (75 ) which compression zone (75 ) comprises an upper tapered sidewall (77a) and a lower tapered sidewall (77b) angled with respect to one another by an angle ''A'' which is in the range of between 5 and 30 degrees of arc and wherein the nozzle assembly (50) further includes an inlet conduit (52 ) in engagement with a valve stem (104) of the aerosol canister (100), a connecting bore (58) connecting the inlet conduit (52) with the nozzle chamber (60). The cap assembly (10) provides improved dispensing of pressurized foaming surface treatment compositions contained with the aerosol canister (100),

Description

IMPROVED FOAMING COMPOSITIONS AND AEROSOL DISPENSERS
The present invention relates to improved aerosol dispensers and foaming compositions dispensed therefrom which provide improved delivery characteristics.
While hard surface and soft surface treatment compositions dispensed from aerosol dispensers are not unknown to the art, frequently the delivery characteristics of aerosol dispensers lead to undesired product delivery characteristics including (but not limited to): poor directional control of the dispensing treatment compositions, poor foaming of the surface treatment compositions when applied to a surface, such as a hard surface and particularly a non-horizontal inclined or vertical hard surface, unsatisfactory amounts of "bearding" (imdesired buildup or residue of dispensed foamed treatment composition on the dispenser, typically in the proximity of and/or beneath the dispensing nozzle) of the treatment composition being dispensed, and/or unsatisfactory amounts of cavitation of the dispensing treatment composition resulting in uneven dispensing of the treatment compositions. To address these and other issues, the ail has recognized that careful consideration of the constituents and formulation of the treatment compositions as well as the propellent used to drive or expel the treatment compositions from the container or can of the aerosol dispenser must be undertaken, and further that the performance characteristics and geometry of the dispenser, particularly the nozzle or nozzle assembly must also be carefully undertaken in order to reduce or eliminate one or all of the undesired product delivery characteristics noted above.
It is to these objects, as well as further objects, that the present invention is directed.
In one aspect the present invention provides for an improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface treatment composition. in another aspect the present invention provides for an improved aerosol dispenser having a specific improved. nozzle assembly configuration, and a pressurized foaming glass and/or shiny or polished hard surface treatment composi tion.
In a further aspect the present invention provides an improved aerosol dispenser having a specific improved nozzle assembly configuration which provides improved product delivery characteristics in the delivery of a pressurized foaming hard surface treatment composition contained within the said improved aerosol dispenser.
In a still further aspect the present invention relates to aerosol dispenser having a speci fic improved nozzle assembly configuration which provides improved product delivery characteristics in the deli very of a pressurized foaming surface treatment composition contained within the said improved aerosol dispenser, wherein the said aerosol dispenser overcomes one or more of the following technical shortcomings: (a) poor directional control of the dispensing treatment compositions; (b) poor or reduced foaming of the surface treatment compositions when applied to a surface, such as a hard surface and particularly a non-horizontal inclined or vertical hard surface: (c)
unsatisfactory amounts of "bearding" of the treatment composition being dispensed; and, (d) unsatisfactory amounts of cavitation of the dispensing treatment composition resulting in uneven dispensing of the treatment composi tions.
In a further aspect the present invention provides for an improved method for the delivery or dispensing of a foaming surface treatment composition from a pressurized, aerosol dispenser which process comprises the step of; supplying an aerosol dispenser ha ving a specific impro ved nozzle assembly configuration which also contains a quantity of the pressurized, foaming surface treatment composition, and, dispensing the foaming surface treatment composition through the foaming surface treatment composition and onto a surface, such as a hard surface and/or a soft, surface.
In a further aspect of the invention there are provided improved methods tor the treatment of glass and/or shiny or polished hard surfaces which methods include the steps of: providing an aerosol dispenser having a specific improved nozzle assembly configuration as described according to any prior aspect of the invention or otherwise as depicted on one or more of the figures, and thereafter, dispensing a cleaning effective amount and/or surface treating effective amount of a pressurized glass and/or shiny or polished hard surface treatment composition from the dispenser onto the said surface in need of treatment, and thereafter optionally wiping and/or rinsing the treated hard surface.
These and further aspects of the invention will be more apparent from a reading of the following specification.
The aerosol dispenser having a specific improved nozzle assembly configuration which provides improved product delivery characteristics in the delivery of a pressurized foaming surface treatment composition is expected to be useful with a variety of formulations of foaming surface treatment compositions, and with a variety of propellants. Such may include one or more of: surfactants, sol vents including organic solvents, water, chelating agents, corrosion inhibitors, pH adjusting agents such as acids and/or bases, pH buffers including inorganic and organic pH buffer compositions, fragrances, colorants such as dyes, as well as other conventional constituents known to the art. High foaming surfactants are preferred.
The propellants used to pressurize the foaming surface treatment composition may be any which are conventionally used in the art. Propellants which may be used include, for example, a hydrocarbon, of from 1 to 10 carbon atoms, such as n-propane, n- butane, isobutane, n-pentane, isopentane, and mixtures thereof; dimethyl ether and blends thereof as well as individual or mixtures of chloro-, chlorofluoro- and/or
fluorohydrocarbons- and/or hydrochlorofluorocarbons (HCFCs). Useful commercially available compositions include A-70 (Aerosol compositions with a vapor pressure of 70 psig available from companies such as Diversified and Aeropress) and Dymel® 152a ( 1,1-difluoroethane from DuPont). Compressed gases such as carbon dioxide, compressed air, nitrogen, and possibly dense or supercritical fluids may also be used. Advantageously the propellent will generally be in an amount of from about 1% to about 50% of the total formulation as contained within the aerosol canister, with preferred amounts being from about 2% to about 25%, more preferably from about 5% to about 15%.
Non-limiting examples of preferred foaming surface treatment compositions which may be used with the specific improved nozzle assembly and aerosol dispenser include those according to the following general formula:
To which preferred foaming surface treatment compositions are added a suitable amount, e.g., I - 25%wt. of an approp riate propellent
The foaming surface treatment composition is dispensed by activating the specific improved nozzle assembly of the aerosol dispenser onto the area in need of treatment, and in accordance with this manner, the above-described the area is treated (e.g., cleaned and/or sanitized and/or disinfected).
The improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming surface treatment composition may be used to intermittently dispense the said treatment composition when needed by a consumer, and in the interval therebetween may be used as a storage container.
The improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface and/or soft surface treatment composition may be a vendible product.
The improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface composition may be used to dispense the said treatment composition onto hard surfaces to provide a treatment benefit thereto. By way of non-limiting example, hard surfaces include: surfaces composed of refractory' materials such as: glazed and unglazed tile, brick, porcelain, ceramics as well as stone including marble, granite, and other stones surfaces; glass; metals; plastics e.g. polyester, vinyl; fiberglass, Formica®, Corian®, and other hard surfaces known to the industry. Further hard surfaces which are to be denoted are those associated with kitchen environments and other environments associated widi food preparation, including cabinets and counteitop surfaces as well as walls and floor surfaces. Still further hard surfaces include those associated with medical facilities, e.g., hospitals, clinics as well as laboratories, e.g., medical testing laboratories. The improved dispenser, nozzle assembly and foaming hard surface treatment composition is particularly useful in the treatment of lavatory surfaces, e.g., lavatory fixtures such as shower stalls, bathtubs and bathing appliances (racks, curtains, shower doors, shower bars) toilets, bidets, wall and flooring surfaces (including painted surfaces). In preferred embodiments the said aerosol dispenser is used to dispense a pressurized foaming glass and/or shiny or polished hard surface treatment composition to a glass surface (e.g., window, glass door, mirror), and/or a shiny or polished hard surface (e.g., metal surface including polished and unpolished metal surface, such as a matte finished metal surface, countertop, tabletop, glazed ceramic surface, enameled surface, and the like). Inclined surfaces, viz. those which are not horizontal such as a vertical glass surface, such as a mirror, window pane, glass door, or the interior of a bathtub, bathtub surround, shower stall, the interior of a sink especially a lavatory sink, are particularly advantageously treated with the improved dispenser, nozzle assembly and foaming hard surface treatment composition described herein.
Particularly preferred embodiments of the improved aerosol dispenser having a specific improved nozzle assembly configuration, and a pressurized foaming hard surface and/or soft surface treatment composition are described hereinafter. It is to be understood that such a preferred embodiment is presented for purposes of illustration of the invention, and not by way of limitation of the scope of the invention.
One preferred embodiment (identified as "E1") of a pressurized foaming surface treatment composition particularly useful in the treatment of glass and/or shiny or polished hard surfaces comprises the following constituents:
Subsequently, 530 grams of the foregoing formulation of "E1" was supplied to the interior of an aerosol canister (optionally lined to reduce internal can corrosion) to which is then added 43 g of a liquefied gas propellant (Propellent SHAP 40, described to be a mixture of isobutane, butane and propane) and the aerosol canister was thereafter sealed by the installation of a conventional aerosol crimp cap having at one side a dip tube which extended downwardly and into the interior of the aerosol canister and thus into the pressurized foaming surface treatment composition, an intermediate valve and on the exterior a valve stem. A cap assembly which comprises a specific improved nozzle assembly configuration (as described with reference to the drawings) was thereafter affixed to the upper end of the sealed aerosol canister such that the valve stem engaged a part of the improved nozzle assembly which was thereafter used to dispense Ihe pressurized foaming surface treatment composition. The interior pressure canister of the pressurized foaming surface treatment composition was in the range of about 48 - 55 psi (at 20°C).
It is to be understood however that the foregoing composition "E l" is directed to a preferred embodiment, bui not to a sole embodiment of a surface treatment composition useful in (he improved aerosol dispenser having a specific improved nozzle assembly configuration described herein. Reference is now made to the accompanying figures which depict in several views a preferred embodiment of a cap assembly which comprises a specific improved nozzle assembly configuration. It is to be understood that the cap assembly forms part of an aerosol dispenser which also includes at least a canister, can or container which is used to contain a quantity of the pressurized foaming surface treatment composition, especially preferably the pressurized foaming hard surface treatment composition which provides excellent cleaning of glass and/or shiny or polished hard surfaces, with little or no residue or little or no surface streaking, as disclosed above.
In the accompanying figures, the reference numerals are used to indicate like elements which may be present in two or more of the figures.
Figure 1 depicts a perspective view of the cap assembly 10 which includes the said specific improved nozzle assembly configuration, and Figure 2 depicts the same in a cross-sectional elevation view, further illustrating the cap assembly 10 mounted on an aerosol canister 100 and in engagement with the valve stem 104. The cap assembly 10 includes two parts, a cowling 15 having a moveable trigger arm 20 which at its proximal end 22 extends from the base skirt 17 of the cowling 15, and a distal end 24 which supports and preferably includes an integral part of the improved nozzle assembly configuration 50. A second part of the cap assembly 10 is a nozzle orifice insert 70 which is also part of the improved nozzle assembly configuration 50. The forward end of the nozzle orifice insert 70 includes a horn 71 opening upwardly in the downstream direction, and a nozzle orifice 80 at or near the end of a nozzle post 82. The improved nozzle assembly configuration 50 includes ait inlet conduit 52 which has an upwatxJly directed bore 54 and near the base thereof, a flanged section 56 which provides tor engagement between the valve stem 104 and the inlet conduit 52. If the opposite end of the bore 54 and extending perpendicularly therefrom is further connecting bore 58 connecting the vertical bore 54 with the nozzle chamber 60. When the aerosol valve is actuated, the pressurized foaming treatment composition exits via the valve stem 104 and then flows outwardly through the vertical bore 54 of the inlet conduit 52, and next is redirected and passes through the connecting bore 58 connecting the vertical bore 54 with the nozzle chamber 60. It is to be noted that the cross-sectional area and/or the diameter of the connecting bore 58 is less than the cross-sectional area and/or die diameter of the vertical bore 54. Preferably the respective ratios out of these cross-sectional areas and/or diameters is between 1 :1.1 -5. Before departing Figure 2, the figure also depicts that the cap assembly 10 maybe engaged upon the top of an aerosol canister 100 in a
conventional manner, such via a snap ring part 13 near the base and on the interior of the base skirl 17 which engages with a suitable recess ring 102 of the aerosol canister or 100. Optionally, but preferably a shown in Fig. 2 are a series of support buttresses 110 within the hollow interior 105 of the cap assembly 10. When present, such support buttresses 110 provided degree mechanical stifihess to the cap assembly 10.
Figures 3 and 4 respectively depict a side cross sectional view of a detail of the unproved nozzle assembly configuration 50 as well as parts of the cap assembly 10, and a top cross-sectional view of a detail of the improved no/zle assembly configuration, as well as parts of the cap assembly 10. As is seen in these figures, the nozzle assembly configuration 50 includes a nozzle chamber 60 having an open end defined by the transverse gap coincident with an end wall 62, a chamber body 64 extending from the end wall 62 towards the interior of the cap assembly 10 and the connecting bore 58 and terminating at a base wall 66. For sake of illustration a center line "AX" coincident with the central axis of the 'chamber 60, as well of the center post 69 is also shown. (Further portions of, or certain elements of the improved nozzle assembly configuration are symmetrical about AX.) A portion of the nozzle orifice insert 70, namely an insert sleeve part 72 is inserted, preferably by a sealing, friction type fitting engagement between the sleeve part 72 and a part of the inner sidewall 63 of the chamber body 64. In such a manner, any pressurized foaming treatment composition and entering the nozzle chamber 60 from the connecting bore 58 may only exit therefrom by passing downstream towards, and outward from the nozzle orifice 80. However, and as the pressurized foaming treatment composition passes in the downstream direction, between the connecting bore 58 and a nozzle orifice 80 it is further compressed. As visible from the figures, a part of the sleeve part 72 of the nozzle orifice insert 70 includes a first generally cylindrical inlet zone 73 upstream of the nozzle orifice 80, and adjacent thereto and downstream therefrom a compression zone 75. The compression zone 75 is funnel shaped, and includes an upper tapered sidewall 77a and opposite thereto, a lower tapered sidewall 77b, which extend between two generally parallel flat vertical sidewalls, 78a, 78b which funnel shaped section of the compression zone 75 causes further compression of the foaming surface treatmen t composition passing from the inlet zone 73 through the compression zone 75 prior to exiting via the nozzle orifice 80. The upper tapered sidewall 77a and the lower tapered sidewall 77b are angled with respect to one another, by an angle "A", which is preferably in the range of between 5 and 30 degrees of arc; a particularly preferred angle is as depicted in the figures. As also depicted, portions of the nozzle insert 70 include two inwardly directed side restrictions 65a, 65b which are dimensioned to define a gap therebetween which gap is sized to engage the center post 69 which extends within the nozzle chamber 60 and depends from and extends perpendicularly from the base wall 66 of the chamber body 64. The center post 66 is of a length which is of sufficient length to extend inwardly into the sleeve part 72 of the nozzle orifice insert 70 so to engage the two side restrictions 65a, 65b of the cylindrical inlet zone 73 and preferably not so far as to attend into, the compression zone 75.
Advantageously the distal tip end 69a of the center post 69 is frustoconical in shape.
Further details of the configuration of the improved nozzle assembly
configuration 50, particularly the of the nozzle orifice insert 70 are depicted on Figure 5 which is a perspective through sectional view of a part of the nozzle orifice insert 70, and on Figure 6 which is a detail part of the depiction of Figure 5. As is visible thereon, the exit orifice 80 has a rectangular cross-section with the two opposite wider sides 81a, 81b being coincident with the respective upper tapered sidewall 77a and opposite thereto, a lower tapered sidewall 77b. The exit orifice 80 opens into a bowl-shaped hom 88 immediately adjacent thereto, which can be formed by a chamfer 84 extending outwardly from a least the wider sides 81 a, 8 lb of the exit orifice 80, were preferably but very advantageously a chamfer extends outwardly from a wider sides, as well as the nanower sides 83a, 83b of die exit orifice 80. Advantageously the ratio of the wider length sides 81a, 81b of the rectangular shaped exit orifice 80 to the shorter length sides 83a, 83b is at least 1 :1 preferably at least 1.2:1, yet more preferably is at least 4-1.2:1 , and especially preferably is in the range of 3.5-2:1. Particularly preferred ratios may be derived from the Figures, particularly from Figs. 8 and 9.
The depicted embodiment of the cap assembly 10 which includes the said specific improved nozzle assembly configuration is believed to be optimized for the delivery of the specific composition of E1 at the indicated internal pressures disclosed above. The indicated configuration and dimensions of the improved nozzle assembly configuration can be readily derived from the accompanying figures. In particularly preferred embodiments, the dimensions illustrated on Fig. 10 demonstrate particularly preferred dimensions, (in Fig. 10, the indicated dimensions are in millimeters). It is nonetheless expected that the indicated dimensions may be slightly varied* e.g., by +/- 10%, preferably by not more than about +/- 10% from the indicated dimensions of angles and lengths, in this particularly preferred embodiment. In this particularly preferred and depicted embodiment of the cap assembly 10 illustrated on Fig. 10, the exit orifice 80 may be a rectangularly shaped exit orifice having a "height " (corresponding to the distance between opposite sides 81a, 81b) of 0,4 mm +/- 0.1 mm and wherein these opposite sides 81 a, 8 lb are straight parallel sides as illustrated in Figs. 1 - 8. The exit orifice 80 has a "width" (corresponding to the distance between opposite sides 83a, 83b) of 1 - 1.5 mm +/- 0.1 mm, but is preferably between about 1.2 - 1.4 mm +/- 0.1 nun, and especially preferably is 1 ,3 mm +/- 0.1 mm, and also, wherein these opposite sides 83a, 83b are straight parallel sides as illustrated in Figs. 1 - 8. Alternately, as illustrated on Fig. 9, the exit orifice 80 may be a rectangularly shaped exit orifice having a "height " (corresponding to the distance between opposite sides 81a, 81 b) of 0.4 mm +/- 0,1 mm at its ends, which however may extend at the midpoint between the ends to 0.45 - 0.5 +/- 0.1 , such that these sides 8t a, 8 lb are slightly concave or bowed outwardly from the line AX. The exit orifice 80 has a "width" (corresponding to the distance between opposite sides 83a, 83b) of 1 - 1.5 mm +/- 0.1 mm, but is preferably between about 1.2 - 1.4 mm +/- 0.1 mm, and especially preferably is 1.3 mm +/- 0.1 mm, and also, wherein these opposite sides 83a, 83b are straight parallel sides as illustrated in Fig. 9, however, although not illustrated in Fig. 9 the opposite sides 83 a, 83b can also be slightly concave or bowed outwardly from the line AX as well by up to about 0.1 mm at their midpoints.
In a particularly preferred embodiment of cap assembly 10, and with reference to the drawings: the angle between 77a, and 77b is between 25 - 35 degrees of arc (°), preferably is 30° +/1 °; the angle of the hom 84, or alternately the angle between the midpoint of a reference plane between sides 81a, 81b and the exterior edges of the hom 84 is between 1 15 - 140°. preferably between 1 15 - 122°, and especially preferably is 120° +/- 1°; the angle of the nozzle horn sidewalls 70a, 70b is between 70 - 95°, preferably between 80 - 90°, and is especially preferably about 85° +/- 0.5° as measured along a vertical line bisecting sides 81a, 81b of the nozzle orifice 80; the distance between the end of the plug 69c and the end of the outlet orifice 80 is between 4.5 and 5.5 mm, preferably is 5 mm +/- 0.2 mm; the diameter of the plug 69 is between 2.5 - 2.8 mm, preferably is 2.7 mm +/- 0.15 mm, the maximum inner diameter of the insert is between 3,2 - 3.6 mm, preferably is 3.4 mm +/- 0.1 mm.
While not wishing to be bound by the following, is believed that the combined effects of the (a) increasing pressure upon the flowing, foaming surface treatment composition passing through the compression zone 75, which suddenly exits via a non- circular exit orifice 80 and preferably were in a least two opposite sides arc edges of his non-circular exit orifice 80 are sharp edges which rapidly expand thereafter due to the presence of the chamfer or bowl shaped horn 88 immediately adjacent diereto and downstream of the exit orifice 80 provides for both an excellent degree of directional control of the dispensed aerosol foaming surface treatment composition and
simultaneously, the initiation of foaming via rapid air en trainmen t as the sprayed dispensed aerosol foaming surface treatment composition exhibits increased foaming as it transits through the ambient air even prior to its deposition on a surface. It is believed that the sharp edges of at least two opposite sides of the exit orifice 80, e.g., 81 a, 81 b immediately followed by the chamfer or bowl shaped horn 88 imparts turbulence to the exiting composition, and the chamfer or bowl shaped horn 88 permits tor immediate volumetric expansion of the exiting composition and capture of air, hence air entrainment at even the initial stages of its flight through ambient air or the ambient environment. This effect is noted with the exit orifice configuration according to Fig. 8, and even moreso with the exit nozzle configuration according to Fig. 9.
Although the above dimensions are optimized for the E1 composition tested, at the indicated pressures and temperatures, nonetheless small modifications to the configuration and dimensions of one or more parts for elements of the improved nozzle assembly configuration may be beneficial or desirable when a composition different than that of E1 is to be dispensed without a deleterious increase in one or more of the following technical shortcomings: (a) unsatisfactory directional control of the dispensing treatment compositions; (b) unsatisfactory foaming of the surface treatment compositions when applied to a surface, such as a hard surface and particularly a non-horizontal inclined or vertical hard surface; (c) unsatisfactory amounts of "bearding" of the treatment composition being dispensed; and, (d) unsatisfactory amounts of cavitation of the dispensing treatment composition resulting in uneven dispensing of the treatment compositions, also referred to as "spitting".
Testing:
A plurality of pressurized aerosol dispensers were prepared by providing 530 grams of formulation of "E1" to an aerosol canister (optionally lined to reduce internal can conrosion), thereafter adding 43 grams of a liquefied gas propellent, thereafter the canister was sealed by the installation of a conventional aerosol crimp cap having at one side a dip tube which extended downwardly and into the interior of the aerosol canister and thus into the pressurized foaming surface treatment composition, an intermediate valve and on the exterior a valve stem. A cap assembly as depicted on Figs. 1 - 7 and 10 was thereafter affixed to the upper end of the sealed aerosol canister such that die valve stem engaged a part of the improved nozzle assembly as shown in Fig. 2. The interior pressure canister of the pressurized foaming surface treatment composition was in the range of about 48 - 55 psi (at 20°C).
Each of the pressurized aerosol dispensers (10 replicates) was tested for the delivery characteristics of the foaming treatment composition which they contained according to the following protocol. An aerosol dispenser was held in a vertical position* 30 cm away from a parallel vertical wall upon which had been taped a sheet of brown paper (kraft paper). The foaming surface treatment composition was dispensed by depressing the moveable trigger arm 20 for about 1 - 5 seconds, (corresponding to a spray rate of 4.7 grams/second) after which pressure was removed from the moveable trigger arm 20. The applied foamed treatment composition was thereafter measured for the height of the deposited sprayed foamed surface treatment composition, and the canister was visually inspected.
The deposited sprayed foamed surface treatment compositions for the 10 tested aerosol dispensers were approximately 38 cm in height as measured on the sheet of brown kraft paper held vertically on the wall. The visual density of the applied deposited sprayed foamed surface treatment compositions appeared to be uniform and dense, which are particularly importance attributes from a consumer standpoint.

Claims

Claims: 1. A cap assembly (10) mounted upon an aerosol canister (100), wherein Ihe cap assembly (10) includes a moveable trigger arm (20) bearing a nozzle assembly (50), the nozzle assembly (50) which includes a nozzle orifice insert (70) which includes a sleeve part (72) and a nozzle orifice (80) inserted within chamber body (64) having a nozzle chamber (60), wherein the sleeve part (72) includes an inlet zone (73) and downstream thereof, a compression zone (75) which compression zone (75) comprises an upper tapered sidewall (77a) and a lower tapered sidewall (77b) angled with respect to one another by an angle "A" which is in the range of between 5 and 30 degrees of arc and wherein the nozzle assembly (50) further includes an inlet conduit (52) in engagement with a valve stem (104) of the aerosol canister (100), a connecting bore (58) connecting the inlet conduit (52) with the nozzle chamber (60).
2. A cap assembly (10) mounted upon an aerosol canister (100), wherein nozzle chamber (60) wither includes two generally parallel flat vertical sidewalls (78a, 78b) extending between the upper tapered sidewall (77a) and the lower tapered sidewall (77b).
3. A cap assembly ( 10) mounted upon an aerosol canister (100) according to claim i or 2, wherein the nozzle chamber (60) further comprises a center post (69) which extends within the nozzle chamber (60) and depends from and extends from a base wall (66) of the chamber body (64).
4. A cap assembly (10) mounted upon an aerosol canister (100) according to claim 3, wherein the center post (69) extends within the sleeve part (72) of the nozzle orifice insert (70).
5. A cap assembly (10) mounted upon an aerosol canister (100) according claim 3 or 4 wherein the center post (69) includes a distal tip end (69a) which is frustoconical in shape.
6. A cap assembly (10) mounted upon an aenosol canister ( 100) accoixiing to any of claims 3 to 5 wherein the nozzle orifice insert (70) includes two inwardly directed side restrictions (65 a, 65b) which are dimensioned to define a gap therebetween which gap is sized to engage the center post (69).
7. A cap assembly (10 ) mounted upon an aerosol canister ( 100) according to any preceding claim, substantially as described with reference to the Figures.
8. A cap assembly (10) mounted upon an aerosol canister ( 100) according to any preceding claim, wherein the aerosol canister (100) contains a foaming surface treatment composition according to the following general formula:
to which is additionally added a suitable amount of a propellent 9. A cap assembly (10) mounted upon an aerosol canister (1.00) according to any preceding claim, wherein the aerosol canister (100) contains a pressurized foaming surface treatment composition particularly useful in the treatment of glass and/or shiny or polished hard surfaces comprises the following constituents:
to which is additionally added a suitable amount of apropellant.
EP11761109.5A 2010-09-16 2011-09-12 Improved foaming compositions and aerosol dispensers Withdrawn EP2616182A1 (en)

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PCT/GB2011/051701 WO2012035325A1 (en) 2010-09-16 2011-09-12 Improved foaming compositions and aerosol dispensers

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WO2012025735A1 (en) * 2010-08-27 2012-03-01 Reckitt Benckiser Llc Improved foaming compositions and aerosol dispensers

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GB1164918A (en) * 1966-12-22 1969-09-24 Coster Tecnologie Speciali Spa Discharge Buttons for Aerosol Dispensers.
DE102006036762A1 (en) * 2006-08-05 2008-02-14 Lindal Ventil Gmbh spray nozzle
US8820665B2 (en) * 2007-09-25 2014-09-02 S.C. Johnson & Son, Inc. Fluid dispensing nozzle
FR2952360B1 (en) * 2009-11-06 2011-12-09 Rexam Dispensing Sys PUSH BUTTON FOR A SYSTEM FOR DISTRIBUTING A PRESSURIZED PRODUCT

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EP2608889A1 (en) * 2010-08-27 2013-07-03 Reckitt Benckiser LLC Improved foaming compositions and aerosol dispensers

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