Note: Descriptions are shown in the official language in which they were submitted.
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1
Active Chlorine Preparations Containing Microencapsulated
Colorants
Field of the Invention
This invention relates generally to bleaching agents and
disinfectants and, more particularly, to active chlorine preparations
containing colorants in microencapsulated form.
Background of the Invention
In Mediterranean countries and also in the United States, cold water
is still predominantly used for washing laundry. The effect of this is that
conventional bleaching agents, for example perborates or percarbonates,
are hardly used because they do not develop any particular activity at
temperatures around 20°C. For this reason, liquid bleaches - generally
surface-active preparations containing up to 10% by weight of hypochlorite
- are normally added to the wash liquor. Comparable preparations are also
used for cleaning and disinfecting hard surfaces. An overview of
hypochlorite liquors was published, for example, by J. Josa and M. Osset in
Jorn. Com. Esp. Deterg. 27, 213 (1997). These hypochlorite liquors rarely
contain colorants because colorants are readily oxidized and change color
in environments containing active chlorine.
Accordingly, the problem addressed by the present invention was to
formulate colorants in a stable manner in preparations containing active
chlorine, thereby improving their appearance.
Description of the Invention
The present invention relates to active chlorine preparations which
are characterized in that they contain colorants in microencapsulated form.
It has surprisingly been found that colorants can be stably
formulated in preparations containing active chlorine, thereby improving
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their appearance, providing they are incorporated in microencapsulated
form. The microcapsules are chemically and physically, more particularly
spatially, stable in the preparations according to the invention, i.e. the
microcapsules do not undergo decomposition or sedimentation in the
preparations. In this way, virtually any known colorants can be used in
preparations containing active chlorine.
Alkali metal hypochlorites and alkali metal hydroxides
The bleaching agents according to the invention normally contain
alkali metal hypochlorites, preferably lithium, potassium and in particular
sodium hypochlorite, as their active chlorine source. The hypochlorites
may be used in quantities of 0.5 to 10% by weight, preferably in quantities
of 3.0 to 7.0% by weight and more preferably in quantities of 4 to 6% by
weight, based on the preparation. The bleaching agents are normally
formulated to have an alkaline pH (pH 12.5 to 14) and, to this end, contain
alkali metal hydroxides, for example sodium and/or potassium hydroxide, in
quantities - based on the preparation - of 0.5 to 2% by weight and
preferably 0.7 to 1.2% by weight.
Microcapsules
"Microcapsules" are understood to be aggregates which contain at
least one solid or liquid core surrounded by at least one continuous shell.
More precisely, they are normally finely dispersed liquid or solid phases
coated with film-forming polymers, in the production of which the polymers
are deposited onto the material to be encapsulated after emulsification and
coacervation or interfacial polymerization. The microscopically small
capsules, also known as nanocapsules, can be dried in the same way as
powders. Besides single-core microcapsules, there are also multiple-core
aggregates, also known as microspheres, which contain two or more cores
distributed in the continuous shell material. In addition, single-core or
multiple-core microcapsules may be surrounded by an additional second,
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third etc. shell. Single-core microcapsules with a continuous shell are
preferred. The shell may consist of natural, semisynthetic or synthetic
materials. Natural shell materials are, for example, gum arabic, agar agar,
agarose, maltodextrins, alginic acid and salts thereof, for example sodium
or calcium alginate, fats and fatty acids, cetyl alcohol, collagen, chitosan,
lecithins, gelatin, albumin, shellac, polysaccharides, such as starch or
dextran, sucrose and waxes. Semisynthetic shell materials are inter alia
chemically modified celluloses, more particularly cellulose esters and
ethers, for example cellulose acetate, ethyl cellulose, hydroxypropyl
cellulose, hydroxypropyl methyl cellulose and carboxymethyl cellulose, and
starch derivatives, more particularly starch ethers and esters. Synthetic
shell materials are, for example, polymers, such as polyacrylates,
polyamides, polyvinyl alcohol or polyvinyl pyrrolidone.
Although they may be produced in any shape, the microcapsules
are preferably substantially spherical. Their diameter along their largest
spatial dimension may be between 10 nm (visually not discernible as a
capsule) and 10 mm, depending on the substances present in their interior
and the application envisaged. Visible microcapsules between 0.1 mm and
7 mm and, more particularly, between 0.4 mm and 5 mm in diameter are
preferred. Microcapsules invisible to the naked eye have a diameter of
preferably 20 to 500 nm and more preferably 50 to 200 nm. The
microcapsules may be obtained by known processes, of which
coacervation and interfacial polymerization are the most important. Any
commercially available surfactant-stable microcapsules may be used as the
microcapsules, including for example the commercial products (the shell
material is shown in brackets) Hallcrest Microcapsules (gelatin, gum
arabic), Colefica Thalaspheres (maritime collagen), Lipofec Millicapseln
(alginic acid, agar agar), Induchem Unispheres (lactose, microcrystalline
cellulose, hydroxypropylmethyl cellulose), Unicerin C30 (lactose, micro-
crystalline cellulose, hydroxypropylmethyl cellulose), Kobo Glycospheres
(modified starch, fatty acid esters, phospholipids), Softspheres (modified
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agar agar) and Kuhs Probiol Nanospheres (phospholipids).
In one preferred embodiment of the invention, the preparations
contain the same microcapsules or different microcapsules in quantities of
0.1 to 10% by weight, more preferably in quantities of 0.2 to 8% by weight
and most preferably in quantities of 0.5 to 6% by weight.
Colorants
In the context of the present invention, colorants are understood to
be any inorganic and organic substances with a coloring effect [DIN 55944
(Nov. 1973)]. Both natural and synthetic colorants may be used. The
inorganic colorants are pigments and may even have a filler-like character
while the organic colorants encompass both pigments and dyes. The
colorants also include, for example, gloss, pearlescent and luminous
pigments. These colorants do not include fluorescent dyes, so-called
optical brighteners.
Dyes in the context of the invention are colorants which are soluble
in solvents and/or binders and which absorb in the visible light region. Both
natural dyes, for example flower and plant dyes, and synthetic dyes, for
example aromatic or heterocyclic, ionic or nonionic compounds, may be
used.
Suitable pigments are, for example, green chlorophthalocyanines
(Pigmosol~ Griin, Hostaphine~ Griin), Solar Yellow BG 300 (Sandoz),
blue chlorophthalocyanine (Hostaphine~ Blau) and Cosmenyl~ Blau.
An overview of the colorants available in Europe can be found in
"Textilbetrieb", Wurzburg, 1978, pp. 51-71. The substances suitable and
approved as dyes which are listed, for example, in the publication
"Kosmetische Farbemittel" of the Farbstoff Kommission der Deutschen
Forschungsgemeinschaft, 3rd fully revised edition, Verlag Chemie,
Weinheim, 1991, pp. 81-106.
These colorants are used in microencapsulated form in the
preparations according to the invention. By this is meant not only the use
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of a single colorant in microencapsulated form, for example a colorless
hypochlorite bleaching agent containing blue microcapsules, but also the
use of various colorants in microencapsulated form, for example a
colorless hypochlorite bleaching agent containing blue and green
5 microcapsules. This is not meant to imply a limit to the number of
microencapsulated colorants used at the same time; for example, the
microcapsules may contain three, four or five etc. different colorants.
In one particular embodiment of the invention, non-
microencapsulated colorants may also be added to the active chlorine
preparations besides microencapsulated colorants. These are understood,
for example, to include blue hypochlorite bleaching compositions
containing blue and/or red microcapsules. Colored hypochlorite bleaching
compositions containing many differently colored microencapsulated
colorants are also possible, for example a green hypochlorite bleaching
composition containing blue, green, red etc. microcapsules. It is possible
in this way to obtain mixtures in which the microcapsules and the
compositions according to the invention can contain both identical and
different colorants.
The colorants are used in concentrations of preferably 0.05 to 0.4%
by weight and more preferably 0.1 to 0.3% by weight, based on the mixture
as a whole.
Seguestering agents
If the preparations are used for treating fabrics, it is advisable to add
to them electrolytes which act as sequestrants for heavy metal ions and
which therefore counteract yellowing of the fabrics. Suitable sequestering
agents are, for example, silicates, phosphonic acids and phosphonates,
polyacrylic acid compounds, alkali metal carbonates, lignin sulfonates and
mixtures of the electrolytes mentioned. The total quantity of sequestrant
used is normally 0.1 to 2% by weight, preferably 0.3 to 1.5% by weight and
more preferably 0.5 to 1.0% by weight, based on the preparation.
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Silicates in the context of the invention are understood to be salts
and esters of orthosilicic acid Si(OH)4 and self-condensation products
thereof. Accordingly, the following crystalline substances, for example,
may be used as silicates:
(a) neosilicates (island silicates) such as, for example, phenakite, olivine
and zircon;
(b) sorosilicates (group silicates) such as, for example, thortveitite and
hemimorphite;
(c) cyclosilicates (ring silicates) such as, for example, benitoite, axinite,
beryl, milarite, osumilite or eudialyte;
(d) inosilicates (chain and band silicates) such as, for example,
metasilicates (for example diopside) or amphiboles (for example
tremolite);
(e) phyllosilicates (sheet and layer silicates) such as, for example, talc,
kaolinite and mica (for example muscovite);
(f) tectosilicates (framework silicates) such as, for example, feldspars and
zeolites and clathrasils or dodecasils (for example melanophlogite),
thaumasite and neptunite.
In contrast to the ordered crystalline silicates, silicate glasses such
as, for example, soda waterglass or potash waterglass are preferably used.
These silicate glasses may be of natural origin (for example
montmorillonite) or may have been produced by a synthetic route. In
another embodiment of the invention, alumosilicates may also be used.
Typical examples of alkali metal or alkaline earth metal silicates are sodium
and/or potassium silicates with a modulus of 1.0 to 3.0 and preferably 1.5
to 2Ø
Phosphonic acids in the context of the invention are understood to
be organic derivatives of the acid HP(O)(OH)2; phosphonates represent
the salts and esters of these phosphonic acids. The organic phosphonic
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acids and phosphonates preferably used are known chemical compounds
which may be prepared, for example, by the Michaelis-Arbuzov reaction.
They correspond, for example, to formula (I):
O
R -P-OR2 (I)
OR2
in which R' is an optionally substituted alkyl and/or alkenyl group
containing 1 to 22 carbon atoms, preferably 2 to 18 carbon atoms and
more preferably 6 to 12 carbon atoms and R2 is hydrogen, an alkali metal
and/or alkaline earth metal, ammonium, alkylammonium and/or alkanol-
ammonium or an optionally substituted alkyl and/or alkenyl group
containing 1 to 22, preferably 2 to 18 and more preferably 6 to 12 carbon
atoms. Typical examples are optionally hydroxy-, nitrilo- and/or amino-
substituted phosphonic acids such as, for example, ethyl phosphonic acid,
nitrilotris-(methylenephosphonic acid), 1-amino- and 1-hydroxyalkane-1,1-
diphosphonic acids. One preferred embodiment of the invention is
characterized by the use of amine oxide phosphonic acids corresponding
to formula (II):
O CH3 H
II
HO-P-(CHZ),"(CH)"-N->O (II)
I I
OR3 H
in which R3 is hydrogen, a (CH2)m(CHCH3)~NH20 group or an alkali metal,
m is a number of 1 to 4 and n has a value of 0 or 1. Amine oxide
phosphonic acids are builders or sequestrants which are marketed, for
example, by Bozetto (Italy) under the name of Sequion~. They are
produced by reacting aminophosphonic acids to form the amine oxide.
According to the invention, both mono- and diamine oxides in the form of
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the phosphonic acids (or salts) corresponding to formula (II) may be used.
Amine oxide phosphonic acids in which R3 is hydrogen, m = 3 and n = 0
(amine oxide based on aminotrimethylene phosphonic acid) are preferably
used.
Polyacrylic acid compounds are understood to be homopolymers
of acrylic acid and methacrylic acid and esters thereof. Besides the acids,
esters of the acids with alcohols containing 1 to 12, preferably 2 to 8 and
more preferably 3 to 4 carbon atoms may also be polymerized. Polyacrylic
acid compounds having a particularly advantageous stabilizing effect are
present as alkali metal salts and have an average molecular weight in the
range from 1,000 to 10,000 dalton and more particularly in the range from
3,000 to 6,000 dalton. A suitable modified polyacrylate is Norasol~ 470 N
(Rohm & Haas, Germany) which is a polyphosphonoacrylate with a
molecular weight of 3,500 dalton.
Surfactants
To support their cleaning performance, the preparations may
additionally contain chlorine-stable surfactants, preferably fatty acid salts,
ether carboxylic acids and salts thereof (alkyl ether carboxylates), alkyl
sulfates, alkyl sulfonates, alkyl benzenesulfonates, xylene sulfonates,
sarcosinates, taurides, isethionates, sulfosuccinates, betaines, sugar
esters and fatty acid-N-alkyl glucamides. Alkyl ether sulfates, amine
oxides, alk(en)yl oligoglycosides and fatty alcohol polglycol ethers are
preferably used. The surfactants together generally make up from 1 to
15% by weight and preferably from 5 to 10% by weight of the preparations.
Alkyl ether sulfates are anionic surfactants which may be obtained
by sulfation of alkyl polyglycol ethers and subsequent neutralization. Alkyl
ether sulfates suitable for use in accordance with the invention correspond
to formula (III):
R4O-(CH2CH2O)"SO3X (lll)
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in which R4 is an alkyl group containing 12 to 18 and, more particularly, 12
to 14 carbon atoms, n is a number of 2 to 5 and, more particularly, 2 to 3
and X stands for sodium or potassium. Typical examples are the sodium
salts of sulfates of the C~2,~4 cocoalcohol +2, +2.3 and +3 EO adduct. The
alkyl ether sulfates may have a conventional or narrow homolog
distribution. The alkyl ether sulfates are preferably used in quantities of 1
to 8% by weight, preferably 1.5 to 6% by weight and more preferably 2 to
4% by weight, based on the preparation.
Amine oxides are also known compounds which are occasionally
classified as cationic surfactants, but generally as nonionic surfactants.
They are produced by oxidation of tertiary fatty amines, which normally
have either one long and two short alkyl chains or two short and one long
alkyl chain, in the presence of hydrogen peroxide. The amine oxides
suitable as surface-active ingredients in accordance with the present
invention correspond to formula (IV):
Rs
R5-N->O (IV)
R'
in which R5 is a linear or branched alkyl group containing 12 to 18 carbon
atoms and R6 and R' independently of one another have the same
meaning as R5 or represent an optionally hydroxysubstituted alkyl group
containing 1 to 4 carbon atoms. Amine oxides corresponding to formula
(IV), in which R5 and Rs represent Cw~4 or C~2,~$ cocoalkyl groups and R'
represents a methyl group or a hydroxyethyl group, are preferably used.
Amine oxides corresponding to formula (IV), in which R5 represents a 02/14
or C~2,~$ cocoalkyl group and R6 and R' represent a methyl or hydroxyethyl
group, are also preferred. The amine oxides are preferably used in
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quantities of 1.5 to 6% by weight and more preferably in quantities of 2 to
4% by weight, based on the preparation.
Alkyl and alkenyl oligoglycosides are known nonionic surfactants
which correspond to formula (V):
5
(V)
R80-[G]P
in which R$ is an alkyl and/or alkenyl radical containing 4 to 22 carbon
atoms, G is a sugar unit containing 5 or 6 carbon atoms and p is a number
10 of 1 to 10. The alkyl and/or alkenyl oligoglycosides, which are also
suitable
as surface-active ingredients, may be derived from aldoses or ketoses
containing 5 or 6 carbon atoms, preferably glucose. Accordingly, the
preferred alkyl and/or alkenyl oligoglycosides are alkyl and/or alkenyl
oligoglucosides. The index p in general formula (V) indicates the degree
of oligomerization (DP), i.e. the distribution of mono- and oligoglycosides,
and is a number of 1 to 10. Whereas p in a given compound must always
be an integer and, above all, may assume a value of 1 to 6, the value p for
a certain alkyl oligoglycoside is an analytically determined calculated
quantity which is generally a broken number. Alkyl and/or alkenyl oligo-
glycosides having an average degree of oligomerization p of 1.1 to 3.0 are
preferably used. Alkyl and/or alkenyl oligoglycosides having a degree of
oligomerization of less than 1.7 and, more particularly, between 1.2 and 1.4
are preferred from the applicational point of view. The alkyl or alkenyl
radical Ra may be derived from primary alcohols containing 4 to 11 and
preferably 8 to 10 carbon atoms. Typical examples are butanol, caproic
alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and the
technical mixtures thereof obtained, for example, in the hydrogenation of
technical fatty acid methyl esters or in the hydrogenation of aldehydes from
Roelen's oxosynthesis. Alkyl oligoglucosides having a chain length of C8 to
Coo (DP = 1 to 3), which are obtained as first runnings in the separation of
technical C8_~$ coconut oil fatty alcohol by distillation and which may
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contain less than 6% by weight of C~2 alcohol as an impurity, and also alkyl
oligoglucosides based on technical C9,~~ oxoalcohols (DP = 1 to 3) are
preferred. In addition, the alkyl or alkenyl radical Ra may also be derived
from primary alcohols containing 12 to 22 and preferably 12 to 14 carbon
atoms. Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol,
palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol,
elaidyl
alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl
alcohol, erucyl alcohol, brassidyl alcohol and technical mixtures thereof
which may be obtained as described above. Alkyl oligoglucosides based
on hydrogenated C~2,~4 cocoalcohol with a DP of 1 to 3 are preferred. The
glycosides are preferably used in quantities of 1.5 to 6% by weight and
more preferably in quantities of 2 to 4% by weight, based on the
preparation.
The preparations according to the invention may contain as further
surfactants fatty alcohol polyglycol ethers corresponding to formula (VI):
R90(CH2CH20)~H (VI)
in which R9 is a linear or branched alkyl and/or alkenyl group containing 6
to 22 and preferably 12 to 18 carbon atoms and n is a number of 1 to 10.
Typical examples are products of the addition of on average 1 to 10 and
preferably 2 to 5 moles of ethylene oxide onto caproic alcohol, caprylic
alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl
alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl
alcohol,
isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol,
linolyl
alcohol, linolenyl alcohol, elaeostearyl alcohol, arachyl alcohol, gadoleyl
alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol and the
technical mixtures thereof obtained, for example, in the high-pressure
hydrogenation of technical methyl esters based on fats and oils or
aldehydes from Roelen's oxosynthesis and as monomer fraction in the
dimerization of unsaturated fatty alcohols. Products of the addition of 2 to
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moles of ethylene oxide onto technical fatty alcohols containing 12 to 18
carbon atoms such as, for example, cocofatty alcohol, palm oil fatty
alcohol, palm kernel oil fatty alcohol and tallow fatty alcohol are preferred.
The polyglycol ethers may have a conventional broad homolog distribution,
5 but also a narrow homolog distribution. Mixtures of fatty alcohol polyglycol
ethers with a linear and branched alkyl chain have proved to be
advantageous by virtue of their favorable thickening effect. In addition,
particularly high-performance preparations contain mixtures of various fatty
alcohol polyglycol ethers in which one component has an HLB value above
10 and the other an HLB value below 10. The polyglycol ethers are used in
quantities of preferably 1 to 5% by weight and more preferably 2 to 4% by
weight, based on the preparation.
Thickeners
The use of electrolytes is a very simple and inexpensive method of
adjusting viscosity. However, it has been found that the presence of
chloride ions alongside peroxide can cause pitting in certain textiles
through the formation of chlorine. For this reason, organic thickeners are
used in one preferred embodiment of the invention. Organic thickeners
are, for example, polysaccharides, more particularly xanthan gum, guar
guar, agar agar, alginates and tyloses, carboxymethyl cellulose and
hydroxyethyl cellulose, also relatively high molecular weight polyethylene
glycol monoesters and diesters of fatty acids, polyacrylates (for example
Carbopols~ [Goodrich] or Synthalens~ (Sigma]), polyacrylamides,
polyvinyl alcohol and polyvinyl pyrrolidone, aluminas such as, for example,
Laponite~ of Southern Clay Products or Zeothix~ of Huber, surfactants
such as, for example, ethoxylated fatty acid glycerides, esters of fatty acids
with polyols such as, for example, pentaerythritol or trimethylol propane,
narrow-range fatty alcohol ethoxylates or alkyl oligoglucosides, which may
be added to the preparations in quantities of 0.1 to 2% by weight.
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Commercial Applications
The preparations according to the invention generally have a non-
aqueous component of 5 to 35% by weight and preferably 8 to 15% by
weight and are particularly suitable for the treatment of flat textile
materials
such as, for example, yarns, fabric webs and, in particular, textiles. They
are normally used at low temperatures, i.e. at cold-wash temperatures (ca.
to 25°C). Not only are the preparations distinguished by excellent
stain
removal, they also reliably prevent the deposition of lime and metal traces
on the fibers and thus also prevent incrustation and yellowing. Although
10 the actual use of the preparations is directed to the removal of stains
during
washing, they are also suitable in principle for other applications in which
hypochlorite solutions are used, for example for the cleaning and
disinfection of hard surfaces. In addition, the preparations may contain
perfumes and optical brighteners.
15 The optical brighteners which are used in microencapsulated form
in accordance with the present invention are preferably those which are
otherwise unstable in active chlorine preparations. Typical examples of
suitable optical brighteners are derivatives of diaminostilbene disulfonic
acid and alkali metal salts thereof. Suitable optical brighteners are, for
example, naphthotriazolestilbenesulfonic acid and derivatives of 4,4'-
diamino-2,2'-stilbene disulfonic acid (flavonic acid), such as in particular
the
salts of 4,4'-bis-(2-anilino-4-morpholino-1,3,5-triazinyl-6-amino)-stillbene-
2,2'-disulfonic acid or compounds of similar structure which, instead of the
morpholino group, contain a diethanolamino group, a methylamino group,
an anilino group or a 2-methoxyethylamino group. Other brighteners which
may be present are those of the substituted diphenyl styryl type, for
example alkali metal salts of 4,4'-bis-(2-sulfostyryl)-diphenyl, 4,4'-bis-(4-
chloro-2-sulfostyryl)-Biphenyl or 4-(4-chlorostyryl)-4'-(2-sulfostyryl)-
diphenyl, methyl umbelliferone, coumarin, dihydroquinolinone, 1,3-diaryl
pyrazoline, naphthalic acid amide, benzoxazole, benzisoxazole and
benzimidazole systems linked by CH=CH bonds, heterocycle-substituted
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14
pyrene derivatives and the like. Mixtures of the brighteners mentioned
above may also be used. Naphthotriazolestilbenesulfonic acid is
obtainable, for example, in the form of its sodium salt as Tinopal~ RBS 200
(Ciba Geigy) which is also known as Fluorescent Brightener 46. The
potassium salt of 4,4'-bis-(1,2,3-triazolyl)-(2)-stilbine-2,2-sulfonic acid
marketed under the name of Phorwite~ BHC 766 is preferred. The
microcapsules generally contain the optical brighteners in quantities of 1 to
95% by weight, preferably in quantities of 10 to 60% by weight and more
preferably in quantities of 25 to 50% by weight, based on the weight of the
capsules.
Ther perfumes used in microencapsulated form in accordance with
the invention are preferably perfumes which would otherwise be unstable in
active chlorine preparations. Typical examples of suitable perfumes are
tetrahydromyrcenol and mixtures of natural and synthetic perfumes.
Natural perfumes include the extracts of blossoms (lily, lavender,
rose, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli,
petitgrain), fruits (anise, coriander, caraway, juniper), fruit peel
(bergamot,
lemon, orange), roots (nutmeg, angelica, celery, cardamom, costus, iris,
calmus), woods (pinewood, sandalwood, guaiac wood, cedarwood,
rosewood), herbs and grasses (tarragon, lemon grass, sage, thyme),
needles and branches (spruce, fir, pine, dwarf pine), resins and balsams
(galbanum, elemi, benzoin, myrrh, olibanum, opoponax). Animal raw
materials, for example civet and beaver, may also be used.
Typical synthetic perfumes are products of the ester, ether,
aldehyde, ketone, alcohol and hydrocarbon type. Examples of perfume
compounds of the ester type are benzyl acetate, phenoxyethyl isobutyrate,
p-tert.butyl cyclohexylacetate, linalyl acetate, dimethyl benzyl carbinyl
acetate, phenyl ethyl acetate, linalyl benzoate, benzyl formate, ethylmethyl
phenyl glycinate, allyl cyclohexyl propionate, styrallyl propionate and benzyl
salicylate. Ethers include, for example, benzyl ethyl ether while aldehydes
include, for example, the linear alkanals containing 8 to 18 carbon atoms,
CA 02299178 2000-02-22
citral, citronellal, citronellyloxyacetaldehyde, cyclamen aldehyde, hydroxy-
citronellal, lilial and bourgeonal. Examples of suitable ketones are the
ionones, a-isomethylionone and methyl cedryl ketone. Suitable alcohols
are anethol, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl
5 alcohol and terpineol. The hydrocarbons mainly include the terpenes and
balsams. However, it is preferred to use mixtures of different perfume
compounds which, together, produce an agreeable fragrance.
Other suitable perfumes are essential oils of relatively low volatility
which are mostly used as aroma components. Examples are sage oil,
10 camomile oil, clove oil, melissa oil, mint oil, cinnamon leaf oil, lime-
blossom
oil, juniper berry oil, vetiver oil, olibanum oil, galbanum oil, labolanum oil
and lavendin oil. The following are preferably used either individually or in
the form of mixtures: bergamot oil, dihydromyrcenol, lilial, lyral,
phenylethyl
alcohol, a-hexylcinnamaldehyde, geraniol, benzyl acetone, cyclamen
15 aldehyde, linalool, Boisambrene Forte, Ambroxan, indole, hedione,
sandelice, citrus oil, mandarin oil, orange oil, allylamyl glycolate,
cyclovertal, lavendin oil, clary oil, ~i-damascone, geranium oil bourbon,
cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP, evernyl,
iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose
oxide, romillate, irotyl and floramate.
Besides the perfumes mentioned above, microencapsulated
perfumes stable to hypochlorite may of course also be used, including
for example citronellol (3,7-dimethyl-6-octen-1-ol), dimethyl octanol (3,7-
dimethyl-1-octanol), hydroxycitronellol (3,7-dimethyloctane-1,7-diol), mugol
(3,7-dimethyl-4,6-octatrien-3-ol), myrcenol (2-methyl-6-methylene-7-octen-
2-0l), tetrahydromyrcenol (THM, 2,6-dimethyloctan-2-ol), terpinolene (p-
mentho-1,4-(8)-diene), ethyl-2-methyl butyrate, phenyl propyl alcohol,
galaxolide (1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopental-2-
benzopyran), tonalide (7-acetyl-1,1,3,4,4,6-hexamethyl tetrahydronaphtha-
lene), rose oxide, linalol oxide, 2,6-dimethyl-3-octanol, tetrahydroethyl
linalool, tetrahydroethyl linalyl acetate, o-sec.-butyl cyclohexyl acetate and
CA 02299178 2000-02-22
16
isolone diphorenepoxide and also isoborneal, dihydroterpineol, isobornyl
acetate, dihydroterpenyl acetate). Other suitable perfumes are the
substances mentioned columns 3 and 4 of European patent application EP
0622451 A1 (Procter & Gamble). The microcapsules contain the perfumes
in quantities of generally 1 to 95% by weight, preferably 50 to 80% by
weight and more preferably 60 to 70% by weight, based on the weight of
the capsule.
The preparations according to the invention are prepared by stirring.
The product obtained may optionally be decanted or filtered to remove
foreign bodies and/or agglomerates. In addition, the preparations have a
viscosity above 100 and preferably above 200 mPas, as measured at 20°C
in a Brookfield viscosimeter (spindle 1, 10 r.p.m.).
Examples
Pigments in microcapsule form and, optionally, pure pigments were
added to various hypochlorite solutions. Examples 1 to 5 of the
preparations according to the invention are set out in Table 1.
CA 02299178 2000-02-22
17
Table 1
Composition of the bleaching agents
#" s~~,.,. ,~"~a~''x ~:, '~,,:" ~~; Q ,~,. ,,~px
a~...1 a n~ t , ~j,~t~, w,,
P.a~~ , " ~~4~~~a~ i' i..:~ ~i,a'.,~hia "" a'~
~' ,~ d ,~' 4 . ~~
'G, ";., z.. r .., ~bj~ ,v, , av", ; f-~.
,. Wd#'H"~.'h a~.~~; ~ I ~ d ~ ~:I, 10.Y
, $ > a" !G~ a ~ t u"1P, " .?, a"~3
a, . 4.. . ,
~ a
",
Sodium hypochlorite 4 1 4 4 4
Sodium hydroxide 0.7 1 0.9 0.7 0.9
Cocofatty alcohol+2E0 - 2 1 - 1
sulfate
Na salt
Lauryl dimethyl amine - 1 - - 2
oxide
Sodium silicate's 0.95 0.1 - 0.95 -
Amine oxide phosphonic 0.1 - - 0.1 -
acid2~
Polyacrylate3~ 1 1 1 1 1
Polyacrylate4~ 0.05 - - 0.05 -
Tetrahydromyrcenol - 0.02 - - 0.02
Microcapsules5~ Solar 0.3 0.2 0.1 - -
Yellow
BG 300
Microcapsules5~ Cosmenyl~- 0.2 - 0.2 0.1
Blau
Microcapsules5~ Hostaphine~- - 0.1 - 0.1
Griin
Microcapsules5~ Hostaphine~- - 0.1 - 0.1
Blau
Solar Yellow BG 300 - - - 0.2 -
Cosmenyl~ Blau - - - - 0.1
Hostaphine(~ Blau - - - - -
Water to 100
'~ modulus 2.0; 2~ Sequion~ (Bozetto); 3~ Carbopol 497 (Goodrich); 4~ Nora-
sol~ LMW 45 N (sodium salt, MW = 4500, NorsoHaas); 5~ shell material:
sodium alginate
