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Патент USA US3061559

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Oct. 30, 1962
Filed Nov. 14, 1955
BY /%4“
United tates
" free
Fatented Oct. 30, 1962
as 99% for high chlorine potency to as low as 1% when
only a mild disinfectant is required. In this connection
it may be mentioned that almost 100% dichlorocyanuric
or trichlorocyanuric acid compositions may give o? these
Myron L. Dickey, Whittier, Cali?, assignor to Purex Cor
poration Ltd., South Gate, Cali?, a corporation of Qali
objectionable odors.
Water soluble inorganic salts and mixtures thereof suit
able for compounding with the dichlorocyanuric or trichlo
Filed Nov. 14, 1955, Ser. No. 546,552
2 Claims. (Cl. 252—90)
rocyanuric acid, include in weight percentages ranging,
e.g., from 90% to 10%, alkali metal phosphates such as
This invention has to do generally with packaged dry 10 tripolyphosphate, tetrasodium pyrophosphate, orthophos
phates, and hexameta phosphates, as well as such builders
bleach and disinfecting compositions employing dichloro
as sodium sulfate and sodium chloride.
cyanuric acid (known also as dichloroisocyanuric acid
For some purposes it may be desirable to compound
and dichloroiminocyanuric acid) or trichlorocyanuric acid
with the acid-salt mixture, other additives such as small
(trichloroisocyanuric acid or trichloroiminocyanuric acid)
as sources of available chlorine upon dissolution of the 15 percentages of detergent, e.g., soap or lauryl sulfate or
alkyl aryl sulfonate synthetics, and appropriate dyes or
fluorescent compounds.
acid in water. More particularly the invention relates to
the stabilization of such packaged compositions in the re
spect of overcoming the eifects of volatile compounds re
The odor eliminating material hereinafter referred to
as the “deodorant” may consist of any of the following,
acid or trichlorocyanuric acid, and which themselves are 20 or mixtures thereof: mixtures of manganese dioxide and
sulting from partial decomposition of the dichlorocyanuric
highly noxious, lachrymatory, irritating, and destructive
to a great variety of common packaging materials.
It has been determined that commercial dichlorocya—
nuric acid or trichlorocyanuric acid, and mixtures of either
acid with water soluble alkaline salts such as sodium 25
sulfate or alkali metal and ammonium phosphates are un
stable in that under ordinary atmospheric and such other
conditions as packaged compositions of dichlorocyanuric
cupric oxide (“hopcalite”), activated alumina, activated
carbon, zeolites, fuller’s earth, bentonite, activated mont
morillonite, silver phosphate, silver nitrate, mercuric ni—
trate, alkali metal silicates (e.g. Metso, anhydrous
Na2O:SiO2=1:l), alkali metal hydroxides, potassium,
rubidium or cesium carbonates, and alkaline earth oxides.
In its physical aspects the invention will be more fully
understood from the following ‘description of the typical
and illustrative embodiments shown by the accompany
acid, normally would be subjected, the cyanuric acid un 30 ing drawing in which:
FIG. 1 shows a package containing the dry bleach or
dergoes partial decomposition, which appears to be
disinfectant together with an odor stabilizing material
catalyzed or otherwise accelerated by the salt component,
contained in a bag;
with resultant evolution of highly noxious and otherwise
‘FIG. 2 illustrates a variational embodiment in which
objectionable chloramine volatiles such as NHzCl and
acid or trichlorocyanuric acid, or of these salts and the
And it is found that the odor condition is su?’iciently
great to preclude consumer acceptance of packaged
bleaches so compounded. It may be observed that from
35 the odor stabilizing material is contained in a separate
compartment of the package, and
FIG. 3 illustrates another form in which the deodorant
is carried in a coating applied to an inside surface of the
a standpoint of quantitative stability, many dichloro
Referring ?rst to FIG. 1, the package generally indi
cyanuric or trichlorocyanuric acid-salt compositions may 40
cated at 10 is shown to consist typically of a glass or
not lose chlorine in any reasonably short period of time
paper board container 11 having top and bottom closures
to a degree of serious de?ciency insofar as sustained
1.2 and i3, and which may be adapted for opening in any
bleaching power is concerned, but nevertheless the acid
suitable manner or by any suitable means, not shown,
will display sui?cient instability to give off these lachryrna
tory volatiles in concentrations that may be small but yet 45 to dispense the package content 14 consisting essentially
of dichlorocyanuric or trichlorocyanuric acid which may
enough to cause rejection of the product.
be admixed with any appropriate water soluble salt or
I have discovered in accordance with the invention
mixture thereof, such as alkali metal phosphate and sul
that different materials and compounds are capable of
converting the noxious volatiles evolved from the acid,
Conversion of nom‘ous volatiles given off by the cya
to compounds which have no objectionable odors. In 50
nuric acid to compounds having no objectionable odor
terestingly, I have found that any of a considerable num
is eifected according to the showing of FIG. 1 by insert
ber of such compounds or materials will in effect func
ing within the container a porous fabric bag 15 which
tion as efficient deodorants in relatively small quantities
may contain any of the deodorants listed hereinabove.
(e.g., from about 1% to 30% by weight of the admixed
acid and water soluble inorganic salt components) when 55 By reason of the porosity of the bag, the deodorant is
exposed to the package contents 14, but remains unmixed
exposed to, while maintained unmixed with, the acid-salt
mixture, but that some of such materials or compounds
In FIG. 2, the deodorant 16 is shown to be accom
modated within the perforated top compartment 17 in
if intimately or uniformly admixed therewith. Accord
ingly, the present invention is predicated upon the con 60 the container 1%. Here the substance 16 remains exposed
to the contents l9 and is contacted by an emanated vola
cepts of utilizing a selected compound or material for
tiles, while remaining out of direct contact with the acid
deodorizing an otherwise objectionably odorous pack
salt mixture.
aged dichlorocyanuric or trichlorocyanuric acid-water
The form of the invention shown in FIG. 3 contem
soluble salt mixture, and of maintaining the “deodorant”
in the package unmixed with the acid-salt mixture but 65 plates applying to the inside of a paper board package
20 containing the acid mixture 21 a coating 22 within
exposed thereto, and in a condition that will permit use
will create or increase odor emanation from the mixture
of any of a large number of deodorants, or mixtures there
which is incorporated any one or mixtures of the de
odorant substances. Typically the coating 22 may con
of, including some materials or compounds that otherwise
sist of sodium silicate or any of the other deodorant sub
would create odor if admixed with the acid-salt mixture.
As to the bleach and disinfectant compositions herein 70 stances admixed with an alkali metal silicate as a binder.
Alternately, or in addition, the deodorant substance
contemplated, dichlorocyanuric acid or trichlorocyanuric
may be incorporated in the paper board itself, as by
acid may be present in weight percentages ranging as high
putting the deodorant into the pulp from which the paper
folding carton (commonly used for spray dried detergent
board is made.
and soap products) which carton had been coated on
its inner walls with sodium metasilicate. After a few
As typical of further speci?c embodiments of the in
vention, the following examples are given:
Example I
hours of standing, the odorous nature of the product had
disappeared and did not reappear on further standing.
In each of the foregoing examples, trichlorocyanuric
20 gms. of a premix of 60% MnO2 and 40% CuO
(hopcalite) are placed in a small perforated bag of poly
acid may be substituted for the same amounts of “di
chlorocyanuric acid,” with essentialy the same results.
ethylene plastic, the edges of which have been heat~
sealed. This bag is suspended in a glass bottle which
"I claim:
1. A package containing a solid bleach material com
contains‘ a formulation of 10% dichlorocyanuric acid,
30% sodium triphosphate, 3% sodium alkyl aryl sulfo
prising a mixture of an inorganic water soluble salt and
a particulate acid of the group consisting of dichloro
mate and 57% sodium sulfate, producing an excess of
cyanuric acid and trichlorocyanuric acid, said acid by
a strange, lachrymatory dichlorocyanuric acid odor.
When checking the odor after two days, it was found
reason of its nitrogen and chlorine tending to evolve
malodorous chloramine compounds, said package also
that the offensive odor had disappeared and did not re
appear after an extensive period of time.
containing a solid deodorant unmixed with said chlo
rinated cynauric acid which deodorant reacts with evolved
chloramine compounds to produce other compounds of
Example II
20 gms. of activated carbon (Norbit 20 x 60 mesh), 20 unobjectionable odor, said deodorant being an alkali
metal silicate distributed on the inside of the container
were placed in a tea-bag (permeable paper construction)
wall in exposure to said mixture.
and suspended in the atmosphere of a glass container
2. A package according to claim 1, in which the pack
?lled with commercial dichlorocyanuric acid. The char
age has a paper board wall on which said silicate is dis
acteristic odor disappeared after a few hours and did not
reappear even after a period of many months.
Example III
About 10 grams of a spray-dried base containing sub
stantially 15% sodium silicate and 85% sodium sulfate
was ?rst poured into a 12 ounce glass bottle, which was
then ?lled with an unstabilized dichlorocyanuric acid 30
formulation. The odor had disappeared after a few
hours, and the product remained free from odor. The
dichlorocyanuric acid ‘with exposed to but remained un
mixed with the spray-dried base.
Example IV
About 300 grams of a bleaching composition con
sisting substantially of 15% sodium tn'polyphosphate,
74% sodium sulfate, 8% dichlorocyanuric acid, and 3%
sodium alkyl aryl sulfonate, which evolved a strong,
lachrymatory odor, was placed in an ordinary chipboard
References Cited in the file of this patent
Kitsee _______________ __ Oct. 29,
Moyer ______________ __ Aug. 15,
Lashar ______________ __ Nov. 17,
Travers ______________ __ Dec. 10,
Peters ________________ __ Jan. 9,
Simpson ______________ __ May 2,
Merrill _______________ __ Apr. 2,
Robbins ______________ __ Sept. 5,
Edelston _____________ __ Jan. 11,
Hardy ______________ __ Aug. 19,
Barnet _______________ __ Apr. 6,
Canada ______________ __ Dec. 10, 1957
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