Adjustable strength laundry bleaching using a two compartment package

• US 4,776,972 A
• Filed: 02/28/1986
• Issued: 10/11/1988
• Est. Priority Date: 04/04/1984
• Status: Expired due to Term

• Current Assignee: The Dail Corporation
• Original Assignee: Purex Corporation (Purex Industries, Inc.)
• Inventors: Barrett, John H.
• Primary Examiner(s): Albrecht, Dennis
• Application Number:
  US06/834,366
• Time in Patent Office: 956 Days
• Field of Search: 206/216, 206/219, 206/220, 206/221, 206/222, 206/568, 215/6, 215/10, 215/DIG. 8, 220/23, 252/90, 252/95, 252/99
• US Class Current: 252/186.38
• CPC Class Codes: B65D 51/28 with auxiliary containers for additional articles or materials B65D51/247 takes precedence
• CPC Class Codes: B65D 81/3205 Separate rigid or semi-rigid containers joined to each other at their external surfaces B65D81/3288 takes precedence
• CPC Class Codes: B65D 81/3216 Rigid containers disposed one within the other
• CPC Class Codes: B65D 81/3233 Flexible containers disposed within rigid containers
• CPC Class Codes: Y10S 215/08 Mixing

Abstract

The invention relates to products useful for home laundering, and more particularly to adjustable strength bleaching compositions, highly advantageous packaging of such compositions, and a method of bleaching involving the combination of the two. More specifically, the invention concerns a highly practical and saleable laundry aid which can be used both on sensitive fabrics/dyes as an all-fabric safe oxygen bleach, and on less vulnerable fabrics/dyes as a much more effective hypohalite bleach of potency similar to that of liquid chlorine bleach. The invention is concerned with the use of an alkali metal halide activator with an oxygen bleach which is packaged in a two compartment package to keep the components separate before use.

Claims

1. A laundry aid package comprising, in combination:

(a) a first openable container containing a bleach base that includes an oxygen bleaching agent for use in home laundering of fabrics,

(b) a dispensing container containing a bleach activator composition and forming a fitment, the activator composition including a halide salt or salts selected from the group consisting of chloride salts and bromide salts of an alkali metal or metals,

(c) the fitment carried by the first container to be readily detachable at least in part for dispensing the activator composition to controllably activate the bleach at the time of fabric laundering,

(d) the first container being a bottle having a removable cap, the bottle having a neck onto which the cap is attached,

(e) the fitment including a receptable associated with the cap and received into said neck and having a flange supported by an upper rim of said neck, the cap retaining the receptacle in position in said neck,

(f) the fitment receptacle defining a sub-container containing the activator composition, and a removable sub-container cap, for providing access to the activator composition after removal of the sub-container cap,

(g) the fitment being accessible after removal of the cap from the bottle, and the bleach base composition in the bottle being accessible after removal of said receptacle from the bottle neck as by elevation of said flange,

(h) all of the activator, and all of the halide salt in the package being confined within said receptacle, whereby the bleach base is free of halide salt admixed therewith,

(i) substantially the entirety of the receptacle as well as the activator and halide salt therein being protectively confined within said neck, and spaced inwardly therefrom, with the activator entirely out of direct communication with the bleach base in the first container whereby the bleach base cannot be activated by contact with any halide salt until the halide salt in the receptacle is accessed and dispensed at the time of fabric laundering,

(j) the entirety of the bottle cap and fitment receptacle being a one-piece unit,

(k) the bleach base containing an oxygen bleaching agent and the activator consisting essentially of one of the following compositions I, II, III, IV and V, wherein ingredient weight percentages are about the same as those listed;

space="preserve" listing-type="tabular">______________________________________ I II III IV V ______________________________________ Sodium bromide 20.0 40.0 60.0 75.0 -- Potassium bromide -- -- -- -- 95.0 Sodium chloride 75.0 10.0 35.0 -- -- Citric Acid -- -- 3.0 -- -- Sodium bicarbonate -- -- 2.0 -- -- Starch 5.0 -- -- 5.0 5.0 Sodium bisulfate -- -- -- 20.0 -- Water -- 50.0 -- -- -- ______________________________________

2. The combination of claim 1 wherein the bottle cap has a internal thread.

3. The combination of claim 2 wherein the cap has a depending skirt that extends in interfitting relation with said neck.

4. The combination of claim 3 wherein the fitment includes a sub-container integral with the bottle cap and extending thereabove, and sub-container cap structure connected to the fitment sub-container.

5. The combination of claim 1 wherein the sub-container side wall is integrally molded with said bottle cap top wall.

6. The combination of claim 5 wherein the fitment sub-container cap is presented at the exterior side of the bottle cap top wall.

7. The combination of claim 1 wherein the bleach base consists essentially of one of the following compositions I, II, III, IV, V and VI wherein ingredient weight percentages are about the same as those listed:

space="preserve" listing-type="tabular">______________________________________ I II III IV V VI ______________________________________ Polyethoxylated 10 -- -- 5 5 -- nonylphenol Sodium alkylbenzene 20 5 5 -- -- 5 sulfonate Tetra sodium pyro- -- -- 10 -- -- -- phosphate Sodium tripolyphosphate -- -- 10 -- -- -- Sodium carbonate 20 45 -- -- -- 45 Sodium bicarbonate -- -- -- 20 5 -- Sodium borate -- -- -- 10 -- -- Sodium metasilicate (1;

1) -- -- 5 -- 10 -- Sodium silicate (1;

2.4) 10 10 -- 10 -- 10 Oxone 10 25 25 25 25 -- Magnesium monoperoxy- -- -- -- -- -- 25 phthalate Fluorescent whitener 0.2 0.2 0.2 0.2 0.2 0.2 Fumed silica 0.2 0.2 0.2 0.2 0.2 0.2 Perfume 0.1 0.1 0.1 0.1 0.1 0.1 Sodium sulfate q.s. q.s. q.s q.s. q.s. q.s.

and the activator includes a halide salt or salts selected from the group consisting of chloride salts and bromide salts of an alkali metal or metals.

8. The combination of claim 1 wherein the bleaching agent is capable of oxidizing halide ions to hypohalite and hypohalous acid, and is selected from the group consisting of

(i) a triple salt of potassium peroxymonosulphate, potassium bisulfate and potassium sulfate,

(ii) magnesium monoperoxyphthalate.

9. The combination of claim 8 wherein the bleach base includes at least one of the following:

(x₁) sodium tripolyphosphate

(x₂) tetra sodium pyro phosphate

(x₃) builder salt selected from the group consisting of pyrophosphate, tripolyphosphate, orthophosphate, carbonate, silicate, sesquicarbonate, bicarbonate, borate, zeolite, citrate, tartrate, gluconate, CMOS, EDTA and NTA

(x₄) surfactant

(x₅) fluorescent whitening agent

(x₆) anti-redeposition agent

(x₇) enzyme

(x₈) dye

(x₉) perfume

(x₁₀) anti-caking agent

(x₁₁) filler

(x₁₂) diluent.

10. The combination of claim 1 wherein the bleach activator composition has one of the following forms:

(i) granular

(ii) tablets

(iii) water soluble packet

(iv) solution.

11. The combination of claim 1 wherein the bottle cap defines a first predetermined bleach fill volume within a zone occupied in part by the fitment sub-container, and the fitment sub-container cap defines a second predetermined activator fill volume, said fill volumes defining a measuring system characterized in that the amount of activator to be mixed with a selected amount of bleach is determined by a predetermined established ratio of said fill volumes.

12. The combination of claim 1 wherein the activator comprises tablets supported by one of the following:

(a) strip

(b) card.

13. The combination of claim 1 wherein the dispensing container comprises a pouch containing activator granules.

14. The combination of claim 1 wherein the bottle has a transparent side wall whereby the dispensing container and the bleach base can be seen sidewardly through the bottle transparent side wall.

15. The combination of claim 14 wherein the dispensing container also has a transparent side wall, whereby the bleach activator can also be seen through both said bottle and said dispensing container transparent side walls.

16. The combination of claim 1 wherein the first container side wall is transparent, whereby the fitment may be observed in said recess, from the exterior.

17. The combination of claim 1 wherein the fitment extends externally of the bottle and is attached thereto, the fitment including a detachable cap exposed exteriorly of the bottle and bottle cap.