Note: Descriptions are shown in the official language in which they were submitted.
~33233~
TOILET BOWL CLEANER
The present invention relates to cake compositions
which are useful for the treatment of the flush water of
toilets. More particularly, the invention i5 concerned
with a long lasting toilet tank dispenser which may be
formed by casting and is responsive to the flushing of
the toilet.
This application is a divisional of copending
Canadian patent application Serial No. 540,143 filed June
19, 1987.
In treating toilet flush water with chemicals in
order to produce desirable effects such as bowl
aesthetics, cleaning, disinfection, deodorization,
aerosol reduction, etc., it is desirable that the
15 che~icals be dispensed into the flush water automatically
each time the toilet i8 flushed. The prior art discloses
numerou~ devices which have been designed for this
purpose.
Particularly desirable devices are those comprising
20 a solid cake composition. In this type of device, a
measured amount of water enters the device during one
flush cycle and remains in contact with the cake between
flushes, thereby forming a concentrated solution of the
composition which i8 dispensed into the flush water
~` 25 during the next flush. The advantages of such devices
are that the chemical composition can be packaged and
shipped in more concentrated form than aqueous solutions
of the chemicals. Also, the problems of liquid spillage
resulting from breakage of the dispensers during shipment
30 or handling is eliminated.
s Prior art surfactant cake compositions are disclosed
in U.S. 4,308,625 (Kitko) and U.S. 4,043,931 (Jeffrey et
al). These patents disclose a lavatory cleansing tablet
which is formed with two or more non-ionic surfactants
35 which incIudes the use of polyalkoxylated alcohols.
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U.S. 4,477,363 (Wong et al) discloses a solid cake
comprising free fatty alcohol and a buffered alkali earth
metal alkyl sulfate surfactant.
JP 58-168699 (Japan Synthetic Rubber Co. et al)
discloses a cast lavatory cleansing block containing 25
to 90 weight % of a mixtuxe of polyethylene glycol or
monoester thereof and polyethylene glycol diester. The
preferred monoester and diester are the stearates and the
exemplified stearates are polyethylene glycol 4000 and
6000 monostearates and polyethylene glycol 6000
distearate. The block may also contain inter alia a
deodorizing agent, detergent, colorant, filler, binder,
aromatic, and dissolution rate adjuster.
JP 58-25398 (Lion) discloses a cast lavatory
cleansing block containing 40 to 98 weight % of
polyethylene glycol diester, preferably distearate.
Especially preferred diesters are polyethylene glycol
1500, 3000 and 9000 distearates. The block may also
contain inter alia aromatic, colorant, surface-active
agent, ger~icide, and builder.
JP 59-24797 (Earth I) discloses a cast lavatory
cleansing block containing at least 40~ of a polyethylene
glycol distearate having 91 to 230 moles ethylene oxide
adduct groups and 0.1 to 60% of either polyoxyethylene
sorbitan monositearate, 6 ethylene oxide or polyethylene
sorbitan tristearate, 20 ethylene oxide. Exemplified
polyethylene glycol distearates have 91, 160, 230 and 245
moles ethylene oxide. The block may also contain inter
alia dye and fragrance.
JP 61-83300 (Earth II) discloses a cast lavatory
cleansing block containing 1-8 volume % 12-hydroxy
stearic acid and/or 0.1-5% benzylidene sorbitol, 20-70%
perfume; 10-30% coloring matter; and 15-60% surface
active agent. The surface active agent can comprise a
polyethylene glycol distearate. The block may also
contain inter alia deodorant, bactericide and chlorine-
remover.
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3 ~33233~
u.s. 4,269,723 (sarford et al I) discl~ses a
compressed lavatory cleansing block containing one or i~
more organic surface active agents and one or more
binders which binder(s) act as dissolution retarding
agents and are selected from clays and water-soluble and
water-dispersible gel-forming organic polymeric
materials. Specified binders include alginates and
carragheenates and specified surface active agents
include alkylene oxide condensates of fatty acids.
G.B. 2,061,g96 A (Jeyes) is substantially the same
as Barford et al I except that the block is formed by
melting lower-melting point components, dispersing higher
melting point and/or liquid components in the melt, and
then casting into a mould.
U.s. 4,460,490 (Barford et al II) discloses a bi-
component lavatory cleansing block comprising a shaped
body formed of a slow-dissolving cleansing composition
containing at least one surface active agent and a tablet
comprising a bleaching agent embedded in or adhered to
the shaped body. The shaped body preferably comprises
one or more readily-soluble surface active agents in
admixture with one or more solubility control agents.
Specified solubility control agents include low
ethoxylates of fatty acids and gel-forming gums, such as
xanthan gum, or materials, such as alginates or
- carragheenates.
U.S. 4,310,434 (Choy et al) and U.S. 4,278,571,
(Choy) disclose surfactant cake compositions containing
~; dyes and perfumes which are utilized in the present
invention. The surfactants provide cleaning and sudsing
in the toilet bowl and also serve to dispense other
components of the compositions such as dyes, perfumes,
organic resins, etc.
Water-soluble inert salts such as alkali metal
chlorides and sulfates are used in such compositions to
act as a "filler" so that the composition can be formed
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4 ~ 3 ~
into cakes of desirable size without using excessive
amounts of active ingredients. The predominant
ingredients of the cake compositions are usually the
surfactant, perfume and the filler salt.
A major problem in this art has been short and/or
erratic longevity of surfactant cakes because of rapid
and uneven dissolution resulting in decreased cake
stability and longevity.
It has been found that a cast solid cake composition
which has a long and uniform block life can be provided
where the composition comprises a polyethylene glycol
distearate if said distearate has a specific water
solubility and molecular weight range.
The present invention is directed towards the
provision of a solid cake which may be formed by casting
and comprises a specific kind of polyethylene glycol
distearate, which compositions are suitable for use for
automatically dispensing cleansing agent~ into the
toilet, particularly a cast solid cake composition having
relatively high melt temperatures and less block surface
tackine6s for improved processing.
The present invention is further directed towards
the provision of a lavatory block which has a long and
uniform block life that eliminates sluggish toilets and
which resists mounding and major fragmentation.
In accordance with the present invention, there is
provided a solid cake lavatory cleansing block
composition, which comprises (i) about 8 to about 35% by
weight of the composition of a polyethylene glycol
distearate having a drop dissolution time of at least
about 5.5 hours according to the Distearate Dissolution
Test (see Example 1 hereinafter) and a molecular weight
from about 3,000 to 12,000, preferably about 7,000 to
9,000, (ii) about 20 to about 64% by weight of the
composition of a water-soluble salt filler, and (iii) up
to about 40% by weight of the composition of a non-ionic
surfactant. Optional ingredients are selected from the
j"
~`` 5 133233~
groups consisting of fragrances, dyes, binders, filler
materials and mixtures thereof. As noted above, the cake
composition comprises from about 8% to about 35%,
preferably about 12% to 29%, by weight of said
polyethylene glycol distearate. It is known that
polyethylene glycol distearate is extremely hydrophilic.
Because of the extreme hydrophilic nature of the
compound, it would be expected that the material would be
very water soluble without any prolonged transition from
solid to a liquid. It has been surprisingly found that
the particular kind of polyethylene glycol distearate of
the invention goes through a hydration stage forming a
tenacious gel so as to provide the aforementioned
extended block life relative to other formulations
containing polyethylene glycol distearate of varying
molecular weights.
It is critical in the present invention that the
polyethylene glycol distearate which is utilized in the
formulation of the cake composition has a drop
dissolution time of at least about 5.5 hours according to
the Distearate Dissolution Test. It has been found that
not all polyethylene glycol distearates having a
molecular weight of about 3,000 to 12,000 possesses such
a characteristic. Their method of preparation appears to
influence their solubility. Preferably, their
~ preparation is according to the method of condensing a
^~ fatty acid with an alcohol as described by W.B. Satkowski
; et al in HPolyoxyethylene esters of Fatty Acids",
ionic Surfactants M.J. Schick Ed. (Dekker, ~Y 1967) p.
142-17A. For example, stearic acid having a molecular
weight of 284.5 is reacted with a polyethylene glycol
having a molecuIar weight range between 5500-8500 to form
a polyethylene glycol distearate having a molecular
weight range of about 6033-9033. Such compound having a
dissolution time of at least 5.5 hours is suitable for
use in the invention.
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~332336
In order to improve the cake characteristics, it has
been found advantageous to utilize in the cake
composition a greater portion of polyethylene glycol
distearate which has a molecular weight betwe0n about
7,000 to about 12,000. A lesser portion of polyethylene
glycol distearate having a molecular weight between about
3,000 to about 7,000, preferably about 3,000 to about
4,000 in combination with the higher molecular weight
polyethylene glycol distearate aids in preventing
mounding and further acts as a binder.
The compositions of the invention also comprise a
non-ionic surfactant. Non-ionic surfactants that may be
included are the condensation products of a long chain
ethylene oxide moiety with an aliphatic alcohol,
preferably a primary or secondary aliphatic alcohol, or
an alkyl phenol. Preferably the primary and secondary
alcohol contains 8 to 20 carbon atoms and the alkyl
phenol-based moiety is one wherein the alkyl chain is
straight or branched and contains 6 to 12 carbon atoms,
2~ preferably 6 to 9 carbon atoms.
Illustrative non-ionic surfactants having the
desired characteristics for foxmulation are available on
the market under the Trade Marks "Neodol" (Shell Oil
Co~pany); "Tergitol" (Union Carbide Company); and "Alfol"
(Continental Oil Company). Specific examples include
"Neodol 25-7" (linear C12-C15 primary alcohol condensed
with 7 moles of ethylene oxide per mole of alcohol);
"Neodol 45-7" (linear C14-C15 primary alcohol condensed
with 7 moles of ethylene oxide per mole of alcohol);
"Tergitol 15-S-7" (random secondary C11-C15 alcohol
condensed with 7 moles of ethylene oxide per mole of
alcohol); and "Alfol 1416-6.5" (primary C14-Cl6 alcohol
condensed with 6.5 moles of ethylene oxide per mole of
alcohol).
Such non-ionic surfactants act as coupling agents to
provide an integration of the cake components and may be
:
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~ t3323~
used in the amount of up to about 40%, preferably about
20 to about 30%, by weight of the cake formulation.
Also useful to enhance the life of the cake are
ethoxylated nonylphenols. The high ethoxylated
nonylphenols, that is those having over 20 moles of
ethylene oxide per mole of phenol, provide slow
dissolution of the cake formulation. Up to about 10%,
preferably up to 5~, by weight of ethoxylated
nonylphenols is prePerably utilized together with the
ethoxylated aliphatic alcohols.
Water-soluble inert salts are used in the present
compositions as "fillers" so that the composition can be
formed into cakes of desired size without using excessive
amounts of active ingredients. They are used alone or in
combination in amounts up to about 64% by weight.
The inert salts (filler salts) used in the
compositions of the present invention can be any water-
soluble inorganic or organic salt or mixtures of such
salts. For purposes of the present invention, "water-
soluble" means having a solubility in water of at least
0.2 grams per hundred qrams of water at 20C. Examples
of suitable salts include various alkali metal and/or
alkaline earth metal sulfates, chlorides, borates,
bromides, citrates, acetates, lactates, etc.
Specific examples of suitable salts include calcium
sulfate, sodium chloride, potassium sulfate, sodium
carbonate, lithium chloride, tripotassium phosphate,
sodium borate, potassium bromide, potassium fluoride,
sodium bicarbonate, calcium chloride magnesium chloride,
sodium citrate, sodium acetate, calcium lactate,
.~ j .
magnesium sulfate and sodium fluoride. The preferred
salts are the inorganic salts, especially the alkali
metal sulfates and chlorides. Particularly preferred
salts, because of their low cost, are calcium sulfate and
sodium chloride. The salts are present in the
compositions herein at levels of from about 20% to about
~ ~ 64% by weight, preferably from about 20% to about 35%.
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~33~
Most preferably, sodium chloride i6 utilized togetherwith guar gum (binder) either alone or with other salts
since the combination not only provides a synergistic
viscosity increase of water and decreases the relative
solubility properties of the matrix in water but also
aids to prevent mounding.
Calcium sulfate is advantageously utilized alone or
together with other natural gum binders or together with
sodium chloride because it has a low solubility level
which is constant over the water temperature range likely
to exist within toilet tanks.
It has been found that natural gums can
advantageously be utilized as binders in the present
invention. The natural gums ~hich may be utilized are
those which arc cold water gelling additives and develop
a high viscosity and a high gel strength. Included in
the gums which may be utilized are guar, xanthan,
tragacanth, carrageenan, karaya, algin, and the like.
Usually, the gum i8 present in an amount of 3 to 35%,
preferably 5 to 15%, by weight of the composition. The
most preferable is guar which has been found to be the
most effective in retarding block dissolution and to
reduce the problem of sluggish toilet behaviour.
As mentioned above, it has been found to be
particularly advantageous to utilize guar gun, together
with sodium chloride as a filler since there is a
synergistic viscosity increase of water that is not found
with other fillers such as calcium sulfate.
Additionally, there is an increase of the relative
3Q insolubility properties of the matrix in water.
As a further binding agent, the use of solid
emollients have been found to be helpful to prevent the
cake of the invention from mounding out. Suitable
~; emollients include glyceryl monostearate, glyceryl
monopalmitate, ethylene glycol stearate, propylene glycol
monostearate, and the like, most preferably is glyceryl
monostearate whiGh provides a matrix to prevent mounding.
.
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11 332~3~
The emollients may be utilized in amounts of up to about
20% by weight, pre~erably about 5% to about 12%.
Variou~ optional materials may be included in the
compositions herein.
Dyes may be included at levels of up to 15%,
preferably about 2.5% to 10% by weight. Examples of
suitable dyes are Alizarine Light Blue B (C.I. 63010),
Carta 81ue VP (C.I. 24401), Acid Green 2G (C.I. 42085),
Astragon Green D (C.I. 42040), Supranol Cyanine 7B (C.I.
10 42675), Maxilon Blue 3RL (C.I. Basic Blue 80), Drimarine
Blue Z-RL (C.I. Reactive Blue 18), Alizarine Light Blue
H-RL (C.I. Acid Blue 182), FD&C Blue No. 1, FD&C Green
No.3 and Acid Blue No. 9 (C.I. 42090). Others are
disclosed in the aforementioned Patent Nos. 4,310,434 and
15 4,477,363.
The cakes of the invention may also contain up to
about 15% by weight of a cationic quaternary ammonium
salt.
It is known that the cationic quaternary ammonium
salts which include a greater number of short-chain alkyl
groups in the structure, incline toward better
bacteriostatic properties. Speci~ic examples of
bacteriostatic agents that may be used in the
compositions of this invention include di-isobutyl
cresoxy ethoxy ethyl dimethyl benzyl ammonium chloride,
di-isobutyl phenoxy ethoxy ethyl dimethyl benzyl ammonium
chloride, myristyl dimethylbenzene ammonium chloride,
benzalkonium chloride, cetyl pyridinium chloride, coconut
dimethyl benzyl ammonium chloride, stearyl dimethyl
benzyl ammonium chloride, alkyl dimethyl benzyl ammonium
chloride, alkyl diethyl benzyl ammonium chloride, alkyl
dimethyl benzyl ammonium bromide, di-isobutyl phenoxy
ethoxy ethyl trimethyl ammonium chloride, di-isobutyl
phenoxy ethoxy ethyl dimethyl alkyl ammonium chloride,
methyl-dodecylbenzyl trimethyl ammonium chloride, cetyl
trimethyl ammonium bromide, octadecyl dimethyl ethyl
ammonium bromide, cetyl dimethyl ethyl ammonium bromide,
; '
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-~ 13~23~
octadecenyl-9-dimethyl ethyl ammonium bromide, dioctyl
dimethyl ammonium chloride, dodecyl trimethyl ammonium
chloride, octadecyl trimethyl ammonium chloride,
octadecyl trimethyl ammonium bromide, hexadecynyl
trimethyl ammonium iodide, octyltrimethyl ammonium
fluoride, and mixtures thereof. Other water dispersible
salts, such as the acetates, sulfates, nitrates, and
phosphates, are effective in place of the halides, but
the chlorides and bromides are preferred.
The cakes may also contain perfumes to impart an
acceptable odor to the flushing water. The perfume may
be in solid form and is suitably present in an amount up
to 15%, preferably up to 10%, by weight. In this
connection, it may be noted that the term "perfume" is
intended to refer to any material giving an acceptable
odor and thus materials giving a "disinfectant" odor such
as essential oils, pine extracts, terpinolenes, ortho
phenyl phenol or paradichlorobenzene may be employed.
The essential oils and pine extracts also contribute as
plasticizers and are functional to a degree in extending
block life.
Certain perfume materials may be added which
additionally function to control the solubility of
anionic sulfate surfactants. Examples of such perfume
materials are isobornyl acetate myrtenyl acetate and
frenchyl acetate. Other suitable perfume or fragrances
are diæclosed in U.S. Patent No. 4,396,522 of Callicott
et al.
The cake formulation may also contain other binding
and/or plasticizing ingredients serving to assist in the
i manufacture thereof, for example, polypropylene glycol
having a molecular weight from about 3,000 to about
10,000 in an amount up to about 20% by weight preferably
about 4% to about 15% by weight of the mixture may be
used. The polypropylene glycol reduces the melt
~; viscosity, acts as a demolding agent and also acts to
plasticize the block when the composition is prepared by
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~ 33233~
11
a casting process. Other suitable plasticizers such as
pine oil fractions, d-limonene, dipentene and the
ethylene oxide-propylene oxide block copolymers may be
utilized.
The blocks of the present invention can be produced
by a variety of processes, e.g., casting/moulding
process, by tablet compression process or by an extrusion
process. The casting process being the prefèrred process
of the invention.
The casting process which is well within the skill
of those in the art involves the melting of the
ingredients and then casting the melt into appropriate
shaped moulds and allowing the mel~ to cool and solidify.
The shaped tablets or blocks each suitably have a weight
of from 20 to 150 grams, preferably from 30 to 70 grams.
In one preferred embodiment, the compositions of the
invention comprise from 8 to 35% by weight of the
polyethylene glycol distearate; up to 40% by weight of
the non-ionic surfactant; up to 64% by weight of water-
so}uble salt filler; and at least one of:
(a) up to 35% by weight of a gelling natural gum;
(b~ up to 20% by weight of a solid emollient binding
agent;
(c) up to 10% by weight of an ethoxylated nonylphenol;
(d) up to 15% by weight of a dye;
(e) up to 15% by weight of a cationic quaternary
ammonium salt;
(f) up to 15% by weight of a perfume; and
(g~ up to 20% by weight of a plasticizer.
In one especially preferred embodiment, said
preferred compositions comprise 20 to 30% by weight of an
ethoxylated C8-C20 aliphatic alcohol, up to 32% by weight -~
of sodium chloride and/or up to 32% by weight of calcium
- sulfate, from 4% to 15% by weight of plasticizer, and at -~
l-ast one of~
up to 10% by weight of glyceryl monostearate; ~-~
up to 10% by weight of ethoxylated nonylphenol;
12 ~l 3 ~
up to 35% by weight of guar gum; and
up to 15% of disinfecting agents, coloring and/or
fragrances.
In another especially preferred embodiment, said
preferred composition comprises:
(a) from 12 to 29% by weight of the polyethylene
glycol distearate;
(b) 5 to 15% by weight of a gelling natural gum;
(c) 5 to 12% by weight of a solid emollient
binding agent;
(d) 20 to 30% by weight of a non-ionic surfactant;
(e) optionally, up to 10% by weight of an
ethoxylated nonylphenol;
(f) 20 to 35% by weight of a water-soluble salt
filler;
(g) 2.5 to 10% by weight of a dye;
(h) optionally, up to 5% by weight of a cationic
quaternary ammonium salt;
(i) optionally, up to 10% by weight of a perfume;
and
(j) 4 to 15% by weight of a plasticizer.
In order that the invention may be better understood
the following Examples are given by way of illustration
only. In the Examples, all parts and percentages are by
weight unless otherwise stated.
The following Examples are for compositions suited
for forming shaped bodies of blocks by a casting/moulding
operation.
EXAMPLE I
Distea~ate Dissolution Test
To determine the dissolution rate of polyethylene
glycol distearate in water the test is performed as
follows:
A sample of the polyethylene glycol distearate is
placed into a beaker and heated so as to form a melt.
Using a 7.5 ml capacity polyethylene transfer pipet, one
drop of the melt is placed in the centre of a petri dish.
.
13 ~332~3~
The drop is allowed to fully solidify for ten minutes,
then 75 ml of deionized water is added to the dish. The
dish is monitored to determine the time xequired for the
drop of surfactant to totally dissolve.
A dissolution time of at least about 5.5 hours
indicates that the polyethylene glycol distearate with
the desired molecular weight i8 suitable for use in
formiulating the composition of the invention.
E~AMPLE II
A. Procedure for the Selection of PolyethYlene Glycol
6000 Distearate (PEG 6000DS~
To determine the dissolution rate of polyethylene
glycol distearate in water the test is performed as
follows:
1. An aliquot of PEG 6000DS is placed in a beaker
and melted.
2. Using a 7.5 ml polyethylene transfer pipet, a
drop of the melt i8 transferred to a
microscope glass slide, the weight of PEG
6000DS added being 0.02 ~ or -OoOOl g using an
analytical balance. The melt is allowed to
solidify for ten minutes.
3. The glass slide i8 carefully placed in a 1000
ml glass beaker containing 800 cc deionized
water which is immersed in a 38-C water bath.
4. The beaker is monitored to determine the time
necessary for the drop of PEG 6000DS to
totally dissolve. A dissolution time of at
least 5.5 hours indicated that the
polyethylene glycol distearate was suitable
for use in formulating the composition of the
invention.
B. Preparatio~ of Cake Composition
Polyethylene glycol 6000 distearate from
Part A 21%
Ethoxylated C~2-C15 Linear,
Primary Alcohol with 7E0 29.5
14 ~3233~
Ethoxylated Nonylphenol with 100 EO5.5%
Ethylene oxide-propylene oxide
block copolymer (8500 MM 80% EO) 3.5%
Acid Blue No.9 dye 5.5%
~ipentene 8.0%
Ortho-phenyl phenol 1.0%
Guar gum 5.5%
Sodium chloride 20.5%
Into a first mixture vessel four-fifths of the
ethoxylated C12 - C~5 linear primary alcohol is added and
slowly heated with stirring. The polyethylene glycol
6000 distearate, ethoxylated nonylphenol and ethylene
oxide-propylene oxide block copolymer are added and the
mixture is heated with stirring to 71~C to form a clear
melt.
In a separate vessel, to the remaininq one-fifth of
the ethoxylated linear primary alcohol there is added
with stirring the dye, the dipentene and the ortho-phenyl
phenol. The mixture i5 then added to the first mixing
vessel followed by the guar gum and the sodium chloride.
The mixture is cooled to 57C and poured into molds.
After cooling to 5C, the blocks are removed from the
mold.
EXAMPLE III
Following the procedure of Example II, a shaped
lavatory cake composition is prepared with the following
ingredients:
Polyethylene glycol 6000 distearate9.0%
Glyceryl monostearate 5.5%
30 Ethoxylated C12-C15 Linear,
Primary Alcohol with 7EO 20.0%
Ethoxylated Ceto Stearyl Alcohol with
50 EO 17.5%
Acid Blue No.9 dye 5.5~
35 Terpinolene 8.0%
;~ Ortho-phenyl phenol 1.0%
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~332336
Guar gum 9.5%
Sodium chloride 24.0%
EXAMPLE IV
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients:
Polyethylene glycol 6000 distearate20.0%
Glyceryl monostearate - acid stable10.0%
Ethoxylated aliphatic alcohol
(Neodol 45-7) 20.0%
Guar gum 9.0%
Sodium chloride 26.0%
Polypropylene glycol (PPGDI000) 5.0%
Cetyl trimethy~ ammonium bromide 1.0%
Acid Blue No. 9 dye 4.0%
Terpinolene 5.0%
The composition had a melt viscosity of 2000 cps (2
Pa.s) at 49-C and a set point at 46-C. The shaped tablet
had an in-tank life of more than 30 days and showed only
~` slight mounding.
EXAMPLE V
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients~
Polyethylene glycol 6000 distearate20.0%
Glyceryl monostearate - acid stable10.0%
Ethoxylated aliphatic alcohol
~; (Neodol 45-7) 21.0%
Guar gum 6.0%
Sodium chloride 26.0%
Polypropylene glycol (PPGD1000) 6.0%
30, Cetyl trimethyl ammonium bromide 1.0%
Acid Blue No. 9 dye 4.0%
`~: : ::
Terpinolene 6.0%
The composition had a melt viscosity of 1120 cps (1-
~ 2 Pa.s) at 51C and a set point at 46C. The shaped
; 35 tablet had an in-tank life of 20-40 days in 6 different
~; ~ toilets and mounded out after 30 days. ~`
16 ~L33233~
EXAMPLE VI
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients:
Polyethylene glycol 6000 distearate16.5%
Glyceryl monostearate - acid stable5.5%
Ethoxylated aliphatic alcohol
(N~odol 45-7) 25.0%
Guar gum 6.0% ~:-
Sodium chloride 32.0%
Polypropylene glycol (PPGD1000) 5.0%
Cetyl trimethyl ammonium bromide 1.0%
Acid Blue No. 9 dye 4.0~
Terpinolene 5.0%
The shaped co~position had an in-tank life of about
30 days and showed only slight flattening.
EXAMPLE VII
Following the procedure of Example II, a shaped cake
composition is prepared with the following
ingredients: :
Polyethylene glycol 6000 distearate12.5~
Glyceryl monostearate - acid stable5.5%
Ethoxylated aliphatic alcohol
(Neodol 45-7) 23.0%
Ethoxylated nonylphenol (NP100) 4.0%
Guar gum 8.0%
Sodium chloride 32.0%
: Polypropylene glycol (PPGD1000) 5.0%
- Cetyl trimethyl ammon~um bromide 1.0%
~ Acid Blue No. 9 dye 4.0%
.j 30 Terpinolene . 5.0%
The shaped composition had an in-tank life of about
-: 25-30 days in 6 different toilets and showed only slight
~:~ mounding.
EXAMPLE VIII
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients:
; Polyethylene glycol 6000 distearate 16.5%
t~
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17 ~ 3323~ -
Glyceryl mono~tearate 5 5%
Ethoxylated aliphatic alcohol
(Neodol 45-7) 23.0%
Calcium sulfate 32.0%
5 Guar gum 8.0%
Polypropylene glycol (PPGDlO00) 5.0%
Cetyl trimethyl ammonium bromide 1.0%
Acid Blue No. 9 dye 4.0%
Terpinolene 5.0%
10 The shaped tablet mounded out after 30 days in-tank.
In lieu of guar gum, an equal amount of any one of
the aforementioned natural gums may be utilized.
EXAMPLE IX
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients~
Polyethylene glycol 6000 distearate 30.0
Glyceryl monostearate 20.0
Ethoxylated ceto stearyl alcohol
with 50E0 20.0%
20 Acid Blue No. 9 dye 4.0%
Cetyl trimethyl ammonium bromide 1.0%
Calcium sulfate 25.0%
The resulting block had the following
characteristics:
Demolding Drop Out
Block surface Dry
Specific gravity 1.11
EXAMPLE X
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients:
Polyethylene glycol 6000 distearate 20.0%
Glyceryl monostearate 15.0%
Ethoxylated ceto stearyl alcohol
with 50E0 20.0%
35 Ethoxylated aliphatic alcohol
(Neodol 25-7) 5.0%
Acid Blue No. 9 dye 4.0%
18 ~33233~
Cetyl trimethyl ammonium bromide 0.9%
Polypropylene glycol 425 10.0%
Calcium sulfate 20.1%
Terpinolene 5.0%
The resulting block had the following
characteristics:
Demolding Light Tap
Block surface Dry
In-tank life (days) 30
Mounding Slight Mounding
EXAMPLE XI
Following the procedure of Exa~ple II, a shaped cake
composition is prepared with the following ingredient~:
Polyethylene glycol 6000 distearate20.0%
Glyceryl monostearate 10.0%
Ethoxylated ceto stearyl alcohol
with 50E0 20.0%
Ethoxylated aliphatic alcohol
(Neodol 25-7) 5.0%
Acid Blue No. 9 dye 4.0%
Cetyl trimethyl ammonium bromide 0.9%
Polypropylene glycol 425 10.0%
Calcium sulfate 25.1~
Terpinolene 5.0%
The resulting block had the following
characteristics:
Demolding Drop Out
Block surface Dry
Specific gravity 1.19
Mounding Slight Mounding
i ,
EXAMPLE XII
Following the procedure of Example II, a shaped cake
composition is prepared with the following ingredients:
Polyethylene glycol 6000 distearate 20.0%
Glyceryl monostearate 12.0%
Ethoxylated ceto stearyl alcohol
with 50E0 20.0%
19
13~33~
Ethoxylated aliphatic alcohol
(Neodol 25-7) 6.0%
Acid Blue No. 9 dye 4.0%
Cetyl trimethyl ammonium bromide o.9%
Polypropylene glycol 425 9.o%
Calcium sulfate 23.1% :
Terpinolene 5.0%
The resulting block had the following
characteristics: :
10 Demolding Drop Out
Block surface Dry
Specific qravity 1.21 ~:
In-tank life (days) 27 -
~ounding None -~
EXAMPLE XIII ~:
Following the procedure of Example II, a shaped cake :~
composition is prepared with the following ingredients~
Polyethylene glycol 6000 distearate22.5
Glyceryl monostearate 10.0%
20 Ethoxylated ceto stearyl alcohol
with 50E0 17.5%
Ethoxylated aliphatic alcohol
(Neodol 25-7) 5.0%
Acid Blue No. 9 dye 4.0%
25 Cetyl trimethyl a onium bromide 0.5%
Polypropylene glycol 425 10.0%
Calcium sulfate 25.5%
Terpinolene 5.0~
: The resulting block had the following
: 30 characteristics:
Demolding Light Tap
Block surface Dry
Specific gravity 1.24
In-tank life (days) 8 toilets,
: 35 20-26 days
Mounding None
~ '
' . .
/
133233~
EXAMPL~_XIV
PROCEDURE FQR PRELIMINARY EVALUATION OF THE NOUNDING
AND COUPLING PROPERTIES OF A TOILET BLOCK
To determiine the potential for a block to (1) mound
or spread out from its original shape; and (2) remain an
integrated unit once the block has been immersed in
water, a test is conducted as follows:
1. Two 2000 ~1 glass beakers are filled with tap
water. One is placed in a refrigerator at
about 5C for ait least four hours while the
other beaker remains at ambient temperature.
2. One block from the sample lot is placed in
each beaker. The blocks remain im~ersed in
water overnight or about sixteen hours.
3. The block are then observed after the
immersion period. The a~bient temperature
sample provides an indication of the degree of
spreading or enlarging of the block base that
may occur during immersion within a toilet
tank. The 5C sample provides an indication
of the integration of the block components or
tendency to dissolve in unison.
The principals, preferred embodiments and modes of
operation of the pre~ent invention have been described in
the foregoing specification. The invention which is
intended to be protected herein, however, is not to be
construed as limited to particular forms disclosed, since
these are to be regarded as illustrative rather than
restrictive. Variations and changes may be made by those
skilled in the art without departing from the scope of
the invention as defined in the following claims.
.. . .
.
