CA1235553A - Stable liquid detergents containing anionic surfactant and monosulfonated brightener - Google Patents

Abstract

STABLE LIQUID DETERGENTS CONTAINING
ANIONIC SURFACTANT AND MONOSULFONATED BRIGHTENER
Abstract of the Disclosure Stable isotropic liquid laundry detergents contain-ing anionic surfactant and monosulfonated brightener to reduce brightener staining of fabrics. Monosulfonated naphthotriazolyl stilbene brighteners are preferred.

Description

:~355i~

STABLE LIQUID DETERGENTS CONTAINING
ANIONIC SURFACTANT AND MONOSULFONAT~D BRIGHTENER
Linda A. Hates Technical Field The present invention relates to stable, preferably single-phase, isotropic liquid laundry detergents con-twining anionic synthetic surfactant and a monosulfonated brightener which reduces or eliminates brightener stain-in of fabrics while maintaining an acceptable level of whitening. Particularly preferred are monosulfonated naphthotriazolyl stilbene (NUTS) brighteners. Preferred compositions also contain a minor amount of a second brightener to further improve fabric whitening. In such compositions, the monosulfonated brightener herein should represent at least about 60~, preferably at least about 75%, by weight of the total brightener in order to provide the desired reduction in fabric staining.
Optical brighteners, also known as fluorescent whitening agents, are commonly used in laundry deter-gents. Brighteners deposit onto fabrics where they absorb ultraviolet radiant energy and remit it as a blue light. This reduces or eliminates any yellowish cast to fabrics and gives them a brighter appearance. However, undesirable brightener staining can occur when liquid detergents come in direct contact with cotton-containing fabrics, such as during pretreatment. The present invention reduces or eliminates such staining while maintaining an acceptable level of fabric whitening.
Background Art British Patent 2,028,365, Gray, published March 5, 1980, discloses built liquid detergents containing anionic surfactants and one or more brighteners, include in NUTS brighteners.
U.S. Patent 3,812,041, Inamorato, issued May 21, 1974, discloses unbolt liquid detergents containing non ionic surfactants and anionic surfactants in a weight ratio of non ionic to anionic ox at least 1. Optional brighteners can include the NUTS type I' ~3~3 U.S. Patent 3,959,157, Inamorato, issued May 25~
1976, discloses liquid detergents containing non ionic surfactants, qua ternary ammonium softening agents and optional brighteners, including NUTS brighteners.
U.S. Patent 4,430,236, Franks, issued February 7, 1984, discloses liquid detergents containing non ionic surfactants, optional anionic surfactants, hydrogen peroxide, brightener, and preferably ~uaternary ammonium softening compounds. NUTS brighteners are specifically mentioned as being useful.
Japanese Patent Application J74-017004, published April 26, 1974, discloses liquid detergents containing NUTS brighteners said to be stable to light.
German Patent Application 2,543,998, published April 7, 1977, discloses clear liquid detergents containing certain diphenyl distyryl brighteners. Examples 1 and 2 are of liquid detergents containing mixtures of mainsail-donated and disulfonated brighteners.
Summary of the Invention The present invention relates to stable isotropic liquid laundry detergent compositions comprising, by weight:
(a) from about I to about 50% of an anionic synthetic surfactant; and (b) from about 0.01% to about 1% of a mainsail-donated brightener which represents at least about 60% of the total brightener in the composition;
said composition containing less than about 2% of quoter-nary ammonium cat ionic surfactants having 2 chains, each containing an average of from about 16 to about 22 carbon atoms.
Detailed Description of the Invention The compositions of the present invention comprise from about 3% to about 50%, preferably from about 7% to about 40%, and most preferably from about 15% to about 25%, by weight of an anionic synthetic surfactant.

~æ~3s5s3 Suitable anionic surfactants are disclosed in U.S. Patent 4,285,841, Barrel et at, issued August 25, 1981, arid in U.S. Patent 3,929,678, Laughlin et at, issued December 30, 1975.
Useful anionic surfactants include the water soluble salts, particularly the alkali metal, ammonium and alkyd-olammonium (e.g., monoethanolammonium or triethanolam-minim) salts, of organic sulfuric reaction products having in their molecular structure an alkyd group containing from about 10 to about 20 carbon atoms and a sulfonic acid or sulfuric acid ester group. (Included in the term "alkyd" is the alkyd portion of aureole groups.) Examples of this group of synthetic surfactants are the alkyd sulfates, especially those obtained by sulfating the higher alcohols 5C8-C18 carbon atoms) such as those produced by reducing the glycerides of tallow or coconut oil; and the alkylbenzene sulfonates in which the alkyd group contains from about 9 to about 15 carbon atoms, in straight chain or branched chain configuration, e.g., those of the type described in U. S. Patents 2,220,099 and 2,477,383. Especially valuable are linear straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyd group is from about 11 to I .
Other anionic surfactants herein are the water-soluble salts of: paraffin sulfonates containing from about 8 to about 24 (preferably about 12 to 18) carbon atoms; alkyd glycerol ether sulfonates, especially those ethers of C8 18 alcohols (e.g., those derived from tallow and coconut oil); alkyd phenol ethylene oxide ether sulfates containing from about 1 to about 4 units of ethylene oxide per molecule and from about 8 to about 12 carbon atoms in the alkyd group; and alkyd ethylene oxide ether sulfates containing about 1 to about 4 units of ethylene oxide per molecule and from about 10 to about 20 carbon atoms in the alkyd group.

. ., ~:3~i553 Other useful anionic surfactants herein include the water-soluble salts of esters of alpha-sulfonated fatty acids containing from about 6 to 20 carbon atoms in the fatty acid group and from about 1 to 10 carbon atoms in the ester group; water-soluble salts of 2-acyloxy-alkane-l-sulfonic acids containing from about 2 to 9 carbon atoms in the azalea group and from about 9 to about 23 carbon atoms in the Al Kane moiety; water-soluble salts of olefin sulfonates containing from about 12 to 24 carbon atoms; and beta-alkyloxy Al Kane sulfonates con-twining from about l to 3 carbon atoms in the alkyd group and from about 8 to 20 carbon atoms in the Al Kane moiety Preferred anionic surfactants are the C10-C18 alkyd sulfates containing an average of from 0 to about 4 ethylene oxide units per mole of alkyd sulfate, C13 linear alkylbenzene sulfonates, and mixtures thereof.
The compositions herein can also contain other synthetic surfactants known in the art, such as the non ionic, cat ionic, ~witterionic~ and ampholytic surface tents described in the above-cited Barrel et at and Laughlin et at patents. Preferably, the total synthetic surfactant represents from about 15~ to about 60%, preferably from about 20% to about I by weight of the composition. In addition, the anionic synthetic surface lent preferably represents at least about 25~, more preferably at least about 30%, and most preferably at least about 50~, by weight of the synthetic surfactant in the composition. It is believed that such anionic surfactant-containing systems provide a sufficiently high level of cleaning and anti redeposition performance that good fabric whitening can be maintained when using the monosulfonated brighteners herein instead of more effect live (but higher staining) brighteners.
A preferred cosurfactant, used at a level of from about 2% to about 30%, preferably prom about 3% to about 25%, more preferably from about 4% to about 15~, by weight of the composition, is an ethoxylated non ionic :~2355~i3 surfactant of the formula Rl(OC2H4)nOH, wherein R is a C10-C16 alkyd group or a C8-C12 alkyd phenol group, n is from about 3 to about 9, and said non ionic surfactant has an HUB (hydrophile-lipophile balance) of from about 10 to about 13. These surfactants are more fully described in U.S. Patents 4,285,841, Barrel et at, issued August 25, 1981, and 4,284,532, Leukemia et at, issued August 18, 1981. Particularly preferred are condensation products of C12-C15 alcohols with from about 3 to about 8 moles of ethylene oxide per mole of alcohol, eye., C12-C13 alcohol condensed with about 6.5 moles of ethylene oxide per mole of alcohol. While these Nina onto surfactants are preferably included in the present compositions to enhance cleaning, it is believed they also tend to syllables the NUT brighteners and prevent them from depositing on fabrics. This can lead to poorer whiteness maintenance in compositions in which the non ionic surfactant comprises a major amount of the synthetic surfactant.
Other preferred cosurfactants, used at a level of from about 0.5% to about 3%, preferably from about 0.7%
to about I by weight, are certain qua ternary ammonium, amine or amine oxide surfactants. The qua ternary ammonium surfactants useful herein are of the formula:
[Wrier) o'er) ] R5N+X-wherein R is an alkyd or alkyd bouncily group having from about 6 to about 16 carbon atoms in the alkyd chain;
each R3 is selected from the group consisting of -CH2CH2-, -CH2CH(CH3)-, -CH2CH(CH20H~, -CH2CH2CH2-, and mixtures thereof; each R is selected from the group consisting of C1-C~ alkyd, Cluck hydroxyalkyl, bouncily, and hydrogen when y is not 0; R is the same as R or is an alkyd chain wherein the total number of carbon atoms of R2 plus R is from about 8 to about 16; each y is from 0 to about 10 and the sum of the y values is from 0 to about 15; and X is any compatible anion.

I -'./

~æ3s~s3 Preferred of the above are the alkyd qua ternary ammonium surfactants, especially the mono-long chain alkyd surfactants described in the above formula when R5 is selected from the same groups as R4. The most pro-furred qua ternary ammonium surfactants are the chloride bromide and methyl sulfate C8 16 alkyd trimethylammonium salts, C8 16 alkyd di(hydroxyethyl~methylammonium salts, the C8 16 alkyd hydroxyethyldimethylammonium salts, C8 16 alkyloxypropyl trimethylammonium salts, and the C,3_16 alkyloxypropyl dihydroxyethylmethylammonium salts.
Of the above, the C10-Cl4 alkyd trimethylammonium salts are preferred, e.g., decal trimethylammonium methyl-sulfate, laurel trimethylammonium chloride, myristyl trimethylammonium bromide and coconut trimethylammonium chloride and methyl sulfate.
Under cold water washing conditions, i.e., less than about 65F 118.3C), the C8 lo alkyd trimethylam-minim surfactants are particularly preferred since they have lower Raft boundaries and crystallization tempera-lures than the longer chain qua ternary ammonium surface tents.
Amine surfactants useful herein are of the formula:
[R (OR ) y] [R (OR ) y] R N
wherein the R, R, R, R and y substituents are as defined above for the qua ternary ammonium surfactants.
Particularly preferred are the C12_16 alkyd dimethY
amine.
Amine oxide surfactants useful herein are of the formula:
[R (OR ) y] OR (OR ) y] R N -I 0 wherein the R , R , R , R and y substituents are also as defined above for the qua ternary ammonium surfactants.
Particularly preferred are the C12_1~ alkyd dimethY
amine oxides.

55i~i3 Amine and amine oxide surfactants are preferably used at higher levels than the qua ternary ammonium surfactants since they typically are only partially protonated in the present compositions. For example, preferred compositions herein can contain from about 0.5~
to about 1.5~ of the qua ternary ammonium surfactant, or from about 13 to about I of the amine or amine oxide surfactants.
The compositions herein can also contain minor I amounts, generally less than about 2%, preferably less than 1%, by weight of qua ternary ammonium cat ionic surfactants having 2 chains, each containing an average of from about 16 to about 22 carbon atoms. These surface tents are disclosed in British Patent 2,041,g68, Murphy, published September 19, 1979. However, the compositions are preferably substantially free of such surfactants because they can cause an undesirable "quit" staining of fabrics, thereby reducing or eliminating the benefits obtained from using the low staining monosulfonated I brighteners herein. The dwelling chain cat ionic surface tents also tend to complex with the anionic brighteners and surfactants herein, reducing the effectiveness of both materials.
Monosulfonated Brightener The compositions of the present invention contain from about 0.01% to about 1%, preferably from about 0.05~
to about 0.5~, more preferably from about 0.1% to about 0.3%, by weight of a monosulfonated brightener. While not intending to be limited by theory, it is believed I that the monosulfonated brighteners herein cause less staining of fabrics because their lack of symmetry reduces crystal growth and build up of brightener on fabrics. For example, the preferred NUTS brighteners herein have substantial substitution (i.e., naphthotri-azalea and sulfonate groups) on one side of a stilbene group and no substitution on the other side.

i it Preferred monosulfonated brighteners are of the formulas CH=CH - (1) NO

I OR
I = N N = C
\ (2 N I -- SHEA = I 7 - I N
I - N/ I: =/ Jo ON - I
] .

I OH = SHEA?) R R R

OH = OH Ho = Shari (O

wherein one R per molecule is S03M; M is a compatible cation, such as hydrogen, sodium (preferred), potassium, ammonium, or substituted ammonium ego., moo-, do-, or tri-ethanolammonium); and each other R is selected from the group consisting of hydrogen, hydroxy, alkyd, hydroxyalkyl, oxyalkyl, amino, substituted amino where each substituent is hydroxy, alkyd, hydroxyalkyl, or ox-alkyd, morpholino, aniline, halogen and cyan, said alkyd groups containing from 1 to 4 carbon atoms.

Sue Preferred brighteners are those of the above forum-lay where the SIAM group is attached directly to the stilbene portion of the molecule. Preferably each other R is selected from the group consisting of hydrogen, hydroxy, alkyd, hydroxyalkyl, amino, substituted amino where each substituent is hydroxy, alkyd or hydroxyalkyl, morpholino and amilino, said alkyd groups containing from 1 to 3 carbon atoms. In a particularly preferred bright ever of formula (1), each other R is hydrogen, i.e., sodium 4-(2H-naphtho [1,2-d~ triazol-2-yl~-2-stilbene-sulfonate, which is commercially available as Tin opal RUBS
from Ciba-Geigy. Preferred brighteners of formula (2) are those wherein the other R attached to the stilbene portion of the molecule is hydrogen, one R attached to the treason rings is aniline and the other R is depth-nolamino, morpholino, methylhydxoxyethylamino, 2-hydroxy-propel amino, or aniline. Preferred brighteners of formula (3) and (4) are those wherein the other R's are all hydrogen.
Preferred compositions herein also contain a minor amount of a second brightener to improve fabric whiten-in In such compositions, the monosulfonated brightener herein represents from about 60~ to about 99%, preferably from about 75% to about 95%, more preferably from about 80% to about 95~, most preferably from about 85~ to about 90%, by weight of the total brightener in order to improve whitening while reducing staining to an accept-able degree. Suitable co-brighteners include any of those known for use in detergent compositions. Examples are disclosed in U.S. Patent 3,812,041, Inamorato, issued May 21, 1974.
Other Components The compositions of the present invention preferably contain from about 25% to about 65%, more preferably from about 30% to about 60~, most preferably from about 40% to about 55%, by weight of water.

Jo ~23~i~i53 The compositions also preferably contain from about 3% to about 30~, more preferably from about 5% to about 20%, by weight of a fatty acid containing from about 10 to about 22 carbon atoms. The fatty acid can also contain from about 1 to about 10 ethylene oxide units in the hydrocarbon chain. Preferred are saturated fatty acids containing from about 10 to about 14 carbon atoms.
In addition, the weight ratio of ClO-Cl2 fatty acid to C14 fatty acid should be at least 1, preferably at least 1 . 5 .
Suitable saturated fatty acids can be obtained from natural sources such as plant or animal esters (e.g., stripped palm kernel oil, stripped palm oil and coconut oil) or synthetically prepared ego.; via the oxidation of petroleum or by hydrogenation of carbon monoxide via the Fisher~Tropsch process). Examples of suitable saturated fatty acids for use in the compositions of this invention include caprice Laurie, myristic, coconut and palm kernel fatty acid. Preferred are saturated coconut fatty acids, from about 5:1 to 1:1 (preferably about 3:1) weight ratio mixtures of Laurie and myristic acid, mixtures of the above with minor amounts leg., 10~-30~
of total fatty acid) of oleic acid; and stripped palm kernel fatty acid.
The compositions herein also preferably contain up to about 25~, preferably from about I to about 10~, by weight of a detergent builder material. Detergent builders are described in U.S. Patent 4,321,165, Smith et at, issued March 23l 1982. However, the compositions preferably contain less than about lo, more prefer-ably less than about 5%, of phosphate materials. Most preferably, the compositions are substantially free of phosphates. Preferred builders are the polycarboxylate materials described in U.S. Patent 4,284,532r Leukemia et at, issued August 18, 1981. Citric acid is particularly preferred.

~23~53 Other optional components for use in the liquid detergents herein include enzymes, enzyme stabilizing agents, palisades, soil removal agents, anti redeposition agents, suds regulants, hydrotropes, pacifiers, anti-oxidants, bactericide, dyes perfumes, and other bright-enters known in the art. Such optional components generally represent less than about 15%, preferably from about 2% to about 10%, by weight of the composition.
The following examples illustrate the compositions of the present invention.
All parts, percentages and ratios used herein are by weight unless otherwise specified.
EXAMPLE I
The fabric staining tendency of various brighteners was evaluated in the following composition.
Component Wt. %
C13 linear alkylbenzene sulfonic acid 7.2 C14 15 alkyd polyethoxylate (2.25~
sulfuric acid 10.8 C12 13 alcohol polyethoxylate (6.5)* 6.5 C12 alkyd trimethylammonium chloride 1.2 C12-14 fatty acid 13.0 Oleic acid 20 0 Citric acid an hydrous 4.0 25 Di~thylenetriamine pentaacetic acid 0.23 T 15 18** 1.5 Monoethanolamine 2.0 Sodium ion 1.66 Potassium ion 2.65 30 Propylene glycol 7.25 Ethanol 7.75 Formic acid 0.66 Brightener As indicated Minors and water Balance to 100 *Alcohol and monoethoxylated alcohol removed.
**Tetraethylene pentaimine ethoxylated with 15-18 moles (avg.) of ethylene oxide it each hydrogen site.

Lowe Brightener A = 0.13% disodium 4,4'-bis((4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbenee disulfonate -~0.076~ dipotassium 4,4'-bis(4-phenyl-1,2,3-txiazol-2-yl~stilbene-2,2'-disulfonate B = 0.2% KIWI. Fluorescent Brightener 230 C = 0.2% of a hexasulfonated stilbene brightener D = 0.2% tetrasodium 4,4'-bis((4-[bis(2-hydroxyethyl)-amino]-6-(p-sulfoanilino) -1,3/5-triazin~2~yl)-amino)-2,2'-stilbene disulfonate E = 0.2% sodium 4-(2H-naphtho [1,2-d] triazol yule)-

2-stilbenesulfonate) The above brighteners are preferably added to the composition as a premix containing, on a finished product basis, 2% monoethanolamine, 2% alcohol polyethoxylate and 2% water, to aid their solubilization.
samples containing the above brighteners were applied to 100% cotton swatches (unbrightened unless otherwise noted), both damp and dry, fox lo minutes, and to dry swatches for 1 hour. The swatches were then washed, dried and graded under ultraviolet light for brightener staining by a panel of expert graders, using the following scale.
O = no visible stain T = trace of stain 1.0 = very light stain 1.5 = light stain 2.0 = medium light stain 2.5 = medium stain

3.0 = heavy stain The results, after averaging the grades, were as follows.

:~3~5~3 Fabric Brig~tenerGrade Dry Damp Dry lo mix 10 mix l ho Prebrightened 5 shirt A 2.5 2.3 2.3 s 3.1 3.3 3.3 - C 2.2 2.7 1.9 D 3.2 3.5 3.1 " E 0 T T
underwear A 2.1 2.8 2.3 " B 2.7 3.0 3.1 C 1.3 2.3 1.3 " D 2.8 3.5 2.3 1- E T 1.0 T
Coarse weave cotton A 3.6 3.0 3.3 " B 4.0 3.7 3.7 " C 2.6 2.3 2.3 1- D 3.2 3.3 3.4 " E 1.3 1.3 1.3 Cotton sweater A 2.4 2.8 2.5 " B 3.3 3.3 3.2 " C 2.2 2.4 2.2 " D 3.2 3.1 3.2 25 11 E 1.0 1.0 1.0 Blue cotton A 3.5 2.6 2.8 " B 2.7 3.1 3.3 " C 1.0 1.6 1.0 " D 2.1 2.7 2~7 " E 0 0 0 Brightener E of the present invention caused much less staining of cotton fabrics than the other brighteners.
EXAMPLE II
Example I was repeated (10 minute application only) using the following brighteners.

So 3 A = 0.13g disodium 4,4'-bis((4-anilino-~-methylhydroxy-ethylamino-1,3,5-triazin-2-yl~amino)-2,2'-~tilbenee disulfonate +0.076% dipotassium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2'-disulfonate B = 0.2% KIWI. Fluorescent Brightener 71 (a disulfonate) C = 0.2% KIWI. Fluorescent Brightener 230 D = 0.2% of an anionic stilbene brightener E = 0.2% sodium 4-(2H-naphtho [1,2-d~ triazol-2-yl)-2-stilbenesulfonate) Fabric Brightener Grade Dry/10 min. Damp/10 min.
Prebrightened shirt A 1.9 2.7 15" B 1.8 2.8 I C 2.5 3.5 " D 2.0 3.3 " E 0 T
Underwear A 1. 8 1. B
20" B 1.7 2.2 " C 2.3 2.8 " D 2.0 2.5 " E 0 0 Coarse weave kitten A 2.8 2.8 " B 2.3 2.9 " C 3.2 3.2 " D 2.8 2.7 " E T T
30 Cotton sweater A 2.5 2.6 " B 2.7 2.4 " C 3.1 3.1 " D 3.1 3.1 " E T T

Blue cotton A 1.9 1.8 B 1.8 1.8 " C 2.5 2.
" D 2.0 202 " E 0 0 White T-shirt A T 1.0 " B 0.5 1.0 " C 1.3 1.3 " D 0.5 1.2 " E o o In the above testing, Brightener E of the present invention caused much less staining of cotton fabrics.
EXAMPLE
Various brighteners were again evaluated as described in Example I, except using the following grading scale.
O = no visible stain T = possible trace 1 = very slight stain 2 = light but definite stain 3 = very visible stain

4 = stained the most possible Brightener A = OWE% disodium 4,4'-bis((4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbenee disulfonate +0.076% dipotassium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2;2'-disulfonate B = 0.15% sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate) 0.05% of dipotassium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2l-disuu-lfonate C = 0.18~ sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate) 0.02% of dipotassium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2'-di-sulfonate I

D = 0.2% sodium 4-(2~-naphtho [1~2-d] triazol-2-yl)-2-stilbenesulfonate) Fabric Brightener Grade 10 mender Prebrightened shirt A 4.0 I B
" C 1.5 " D T
10 Underwear A 3.0 " B 2.0 " C 1.0 " D T
Coarse weave kitten A 4.0 " B 3.0 " C 2~0 " D 1.0 Cotton sweater A 4~0 20 " B 2.0 " C 1.0 " D T
Blue cotton A 3.0 " B T
25 " C 0 " D 0 White T-shirt A 2.3 " C O
30 " D 0 Brighteners B (with 75% of total brightener being D), C (with 90% of total brightener being D), and D of the present invention again caused less staining of cotton fabrics.

~23ss~

EXAMPLE IV
The following brighteners were evaluated, as described in Example III.
A = 0.13% disodium 4,4'-bis((4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2-yl~amino~-2,2'-stilbenee disulfonate +0.076% dipotassium 4,4'-bis(4-phenyl-1,2,3-tria-zol-2-yl)stilbene-2,2'-disulfonate B = 0.1~ sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate~
C = 0.15% sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate) D = 0.2~ sodium 4-(2H-naphtho ~1,2-d] triazol-2-yl)-2-stilbenesulfonate) 15 Fabric Brightener Grade 10 mender Prebrightened shirt A 3.5 " C 0 " D 0 Underwear A 3.5 'I B 0 " C O
" D 0 Coarse weave cotton A 3.5 " B lo " C 1.5 " D 1.5 Cotton sweater A duo " B lo " C 1.0 ' D lo ~Læ~5s~3 Blue cotton A 3.0 " C O
" D 0 White T-shirt A lo " B 0 " C O
.. D
The above results show that Brighteners By C and D
of the present invention caused little or no staining at levels between Oily and 0.2%.
EXAMPLE V
The following brighteners were evaluated as described in Example III under various pretreatment times and conditions.
A = 0.13% disodium 4,4'-bis~(4-anilino-6-methylhydroxy-ethylamino-l,3,5-triazin-2-yl)amino3-2,2'-stilbQnee disulfonate +0.076% dipotassium 4,4'-bls~4-phenyl-l,2,3-tria-zol-2-yl3stilbene-2,2'-disulfonate B = 0.2% sodium 4-(2H-naphtho 11,2-d] triazol-2 yule-stilbenesulfonate) C = 0.18% sodium 4-(2H-naphtho lid triazol-2-yl~-2-stilbenesulfonate) + 0.02~ disodium Boyce-25 anilino-6-methylhydroxyethylamino-l,3,5-triazin-2--yl)amino)-2,2'-stilbene disulfonate D = 0.15% sodium 4-(2H-naphtho [1,2-d] triazol-2-yl) 2-stilbenesulfonate) + 0.05~ disodium Bessel-anilino-6-methylhydroxyethylamino-l,3,5-triazin-2--yl)amino)-2,2'-stilbene disulfonate After lo minutes on Dry Fabric Fabric Brightener Pretreat Condition**
l 2 3 4 Cotton sweater A 4.0 4.0 3.5 3.5 " B lo lo T T
" C 2.0 2.0 2.0 2.0 " D 3.0 3.0 2.0 2.0

5~3 Coarse weave cotton A 4.0 4.0 3.5 4.0 " B 1.0 1.0 1.0 1.0 " C 200 2~5 2.0 1.5 " D 3.0 3.0 3.0 2.5 White cotton pants A 4.0 4.0 4.0 " B 1.0 1.0 T
" C 2.0 1.5 2.0 " D 3.0 2.0 2.5 10 After 10 minutes on Damp Fabric Fabric Brightener Pretreat Condition**

Cotton sweater A 4.0 4.0 4.0 3.5 " B 1.0 T T 1.0 " C lo 1.0 1.0 2.0 " D 3.0 2.0 2.0 2.0 Coarse weave cotton A 4.0 4.0 4.0 4.0 " B 1.0 T 1.0 1.0 " C 2.5 2.0 2.0 2.0 " D 3.0 3.0 3.0 3.0 White cotton pants A 4.0 4.0 4.0 " B 1.0 T T
" C 2.0 1.5 1.0 " D 3.0 2.5 2.0 Overnight on Dry Fabric Fabric Brightener Pretreat Condition**

Cotton sweater A 4.0 3.0 4.0 4.0 " B 1.0 1.0 1.0 1.0 " C 2.5 2.0 2.5 2.0 " D 3.0 3.0 3.0 3.0 Coarse weave cotton A 4.0 4.0 4,0 4.0 " B 1.5 2.0 1.0 2.5 " C 2.0 3.0 2.0 3.0 " D 3.0 3.0 3.0 3.0 55~;3 White cotton pants A 4.0 4.0 4.0 3.5 B 1.0 1.0 2.0 1.0 " C 2.5 2.0 2.0 1.5 " D 3.0 2.0 3.0 1.5 Gray corduroy pants Aye 3.5 2.5 " B 0.5 1.5 1.0 " C 1.5 1.5 1.5 " D 2.0 1.5 1.5 Unbleached muslin tablecloth A 4.0 4.0 4.0 " B 2.0 2.0 2.0 " C 2.5 2.5 3.0 " D 3.0 3.0 3.0 Overnight on Damp Fabric 15 Fabric Brightener Pretreat Condition**

Cotton sweater A 4.0 4.0 4.0 4.0 " B 1.5 2~5 2.0 T
" C 2.5 2.5 3.0 2.0 20 " D 3.5 3.0 3.0 3.0 Coarse weave cotton A 4.0 4.0 4.0 " B 1.5 2.0 2.0 2.5 " C 2.5 3.0 3.0 3.0 25 " D 3.0 3.0 3.0 OWE
White cotton pants A 4.0 4.0 4.0 3.5 " B 2.0 1.0 1.5 T
" C 2.0 2.0 2.0 1.5 " D 2.5 3.0 3.0 2.5 grow corduroy pants A 4.0 3.5 3.5 " B 2.5 2.0 2.0 " C 2.5 2.0 2.0 " D 3.0 3.0 2.0 Unbleached muslin tablecloth A OWE 4.0 4.0 " B 3.0 2.0 2.5 " C 3.0 3.0 3.0 " D 3.0 3.0 3.5 **l= 1 ml of product applied 2= 1 ml of product applied + rub 5 times 3= 2 ml of product applied scrub for 10 seconds 4= 1 ml of product applied + rub rinse Brighteners B, C (with 90% of total brightener being By, and D (with 75% of total brightener being B) of the present invention provided less staining of cotton fabrics.
EXAMPLE VI
Brightener staining was evaluated as described in Example III using the following compositions.
Composition A = a commercially available detergent believed to contain the following components.
Component Wt. %
C11 3 linear alkylbenæene sulfonate 17.5 C12 15 alcohol polyethoxylat~8) 7.0 Sodium citrate 10.1 Zillion sulfonate 5.2 Monoethanolamine 2.0 25 Methyl cellulose 0.7 Disodium 4,4'-bis((4-anilino-

6-morpholino-1,3,5-triazin-2-yl) amino)-2,2'-stilbene disulfonate 0.05 Sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate 0.04 Water -I minors Balance to 100 Composition B
Component Wt._%
C12_13 alcohol polyethoxylate ~6.5) 21.5 Sodium C12 14 alcohol polyethoxylate I sulfate 11.6 5~3 Ethanol 10.0 Disodium 4,4'-bis((4-anilino-6-methylhydroxyethylamino-1,3,5-triazin-2-yl)amino) 2,2'-stilbene disulfonate 0.21 Waxer + minors Balance to lo Composition C = Composition B except replace India acted brightener with 0.2% of sodium 4-i2H-naphtho[1,2-d]
triazol-2-yl)-2-stilbenesulfonate.
Composition D = Composition B except replace India acted brightener with 0.13% disodium 4,4'-bis((4-anilino-6-methylhydroxyethylamino-1,3,5-triazin-2-yl)aminoowe'-stilbene disulfonate and 0.076~ of dipotassium Boyce-(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2'-disulfoovate.
Composition E = Composition of Example I with 0.13~
of disodium 4,4'-bis((4-anilino-6-methylhydroxyethyl-amino-1,3,5-triazin-2-yl)amino)-2,2'-stilbene disulfonate and 0.076~ of dipotassium 4,4'-bis(4-phenyl-1,2,3-tria-zoo 2-yl)stilbene-2,2'-disulfonate.
Composition F = Composition of Example I with 0.15%
of sodium 4~(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbene-sulfonate and 0.05% of disodium 4,4'-bis((4-anilino-6-methylhydroxyethylamino-1,3,5-triazin-2-yl)amino)--2,2'-stilbene disulfonate.
Composition G = Composition of Example I with 0.15%
of sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbene-sulfonate and 0.02% of disodium 4,4'-bisl(4-anilino-6-methylhydroxyethylamino-1,3,5 treason yl)amino)-2,2'-stilbene disulfonate.
Composition H = Composition of Example I with 0.15~
of sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbene-sulfonate The results were as follows.

~3~i553 Fabric Composition Grade 10 mender overnight/damp Cotton sweater A 3.0 3.3 " B 3.0 4.0 " C T 2.8 D 3.5 4.0 " E 4.0 4.0 " F 3.3 3.0 " 2.3 2.5 " H 1.0 2.5 Coarse weave cotton A 3.0 3.5 " B 3.0 4.0 " C T 2.3 " D 3.5 3.5 " E 4.0 4.0 " F 3.0 3.0 G 2.5 3.0 " H 1.3 2.3 20 White T-shirt A 1.5 1.0 " B 1.5 4.0 " C 0 2.0 " D T 3.0 " E 1.0 3.0 25 if F 1.0 2.5 " G T 2.0 " H 0 2.0 Compositions C, G and H of the present invention caused less staining of cotton fabrics than the other compositions. Composition F of the invention caused less staining than Composition E, and about the same level of staining as Composition A even though F contained more than twice the level of brightener in A.

.

EXAMPLE VII
Brightener staining was evaluated as described in Example VI on a wide variety of fabrics, using the following compositions.
Composition A = Composition E from Example VI
Composition B = Composition H from Example VI
Composition C = Composition B from Example VI
Composition D = Composition B from Example VI, except replace indicated brightener with the brightener mixture of Composition G of Example VI.
Composition E = Composition G from Example VI.
The results were as follows.
Fabric Composition Grade 10 min/dr~overnight/damp Polycotton (84% C) A 2.0 3.0 " B O T
" C 3.0 4.0 D 2.0 3.0 20 " E T 2.5 Coarse weave cotton A 4.0 4.0 'I B 1.0 2.0 " 3.0 3.0 25 " D 200 3.0 " 3.0 3.0 Cotton denim A 3.0 4.0 'I B 0 0 " C 3.5 3.5 30 " D 2.0 2.0 if E 1.0 1.5 Polycotton (50~ C) A 0 2.0 " B O T
35 " C 0 2.0 " D 0 0 " E 0 T

~3~5~3~

Underwear A 3.5 4.0 " B T 2.5 " C 4.0 4.0 " D 3.0 3.5 5 " E 2.0 3.0 Muslin A 4.0 4.0 B 1.0 2.5 " C 4.0 I
" D 2.0 3.0 10" E I 3.0 Muslin A 3.5 3.5 " B 0 1.0 " C 4.0 4.0 " D 200 2.0 15" E 2.0 2.0 Silk A 2.0 4.0 B 1.0 3.0 C 1.0 1.5 " D T 1.5 201 E 1.0 3.0 Rayon A 4.0 4.0 B 1.0 2.0 C 4.0 4.0 if D 3.0 3.0 251 E 3.0 3.5 On polycotton (35% C), wool, polyester and triage-late fabrics, all grades were "0" except for grades oft for overnight contact of Composition A on polycotton (35~ C), D on wool, and B and E on triacetate, and for 10 minute contact of Composition E on triacetate.
The above results show that Compositions B, D and E
of the present invention cause less staining on a variety of fabrics.
EXAMPLE_VII
Brightener staining was evaluated as described in Example III, using the following brighteners.

it A = 0.13% disodium 4,4'-bis(~4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2 yl)amino)-2,2'-stilbene disulfonate +0.076% dipotassium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2' disulfonate B = 0.15% sodium 4-(2H-naphtho [1,2-d] triazol-2-yl)-2-stilbenesulfonate) C = B + 0.01% disodium 4,4'-bis((4-anilino-6-methylhy-droxyethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbene disulfonate D = B 0.015% disodium 4~4'-bis((4-anilino-6-methyl-hydroxyethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbene disulfonate E = B + 0.02% disodium 4,4'-bis((4-anilino-6-methyl-hydroxyethylamino-1,3,5-triazin-2-yl)amino~-2,2'-siilbene disulfonate FabricComposit_on Grade 10 min/dryovernight/damp Coarse weave cotton A 3.5 4.0 " B 1.0 1.5 " C 2.0 2.5 " D 2.0 2.0 " E 2.0 2.0 25 Cotton sweater A 3.8 4.0 " B T 2.0 " C 1.5 3.0 " D 1.8 2.0 " E 1.5 2.0 30 Unbleached muslin A 3.0 OWE
" B 0.5 2.3 " C 1.0 1.5 " D 1.5 2.0 " E 1.5 2.3 ~;~35~53 . .

Underwear A 3.0 4.0 s T 3.0 " C 1.3 3.0 " D 1.3 3.0 " E 1.3 3.0 White T-shirt A 1.8 3.0 " B 0 T
" 0 1.3 " D 0 1.0 " E T 1.8 Brighteners B, C, D and E of the invention caused less staining than Brightener A.
EXAMPLE IX
Brightener staining was evaluated as described in Example VI using the following compositions.
Composition = Composition E of Example VI.
Composition B = Composition G of Example VI.
Composition C
Component Wt. %
20 C13 linear alkylben~ene sulfonic acid 7.2 C14_15 alkyd polyethoxylate (2.25) sulfuric acid 10.8 C12 13 alcohol polyethoxylate (6.5)* 5.0 C12 alkyd trimethylammonium chloride 1.2 25 C12 14 fatty acid 10.0 Citric acid (an hydrous) 4.0 Diethylenetriarnine pentaacetic acid 0.23 15-18** 2.0 Monoethanolamine 2.0 30 sodium ion 1.66 Potassium ion 2.65 Propylene glycol 2.5 Ethanol By Formic acid 0.66 ~3~55i3 Disodium 4,4'-bis((4-anilino-6-methylhydroxyethylamino-1,3~5-triazin-2-yl)amino)-2,2l-stilbene disulfonate 0.13 Dipotassium 4,4'-bist4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2'-dlsulfonate 0~076 Minors and water Balance to 100 *Alcohol and monoethoxylated alcohol removed.
**Tetraethylene pentaimine ethoxylated with 15~18 moles (avg.) of ethylene oxide at each hydrogen site.
Composition D = Composition C, except replace indicated brighteners with 0.15% of sodium 4-(2H-naphtho[l,2-d] triazol-2-yl)-2-stilbenesulfonate and 0.02% of disodium 4,4'-bis((4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbenee disulfonate.
Composition E = Composition C, except replace indicated brighteners with 0.15% of sodium 4-(2H-naphtho-[1,2-d] triazol-2-yl)-2-stilbenesulfonate.
The results were as follows.
FabricCvmposition Grade 10 mender overni~ht/damp Coarse weave cotton A 3.5 4.0 " B 2.0 2.5 " C 4.0 4.0 " D 2.0 2.0 " E 1.0 1.5 30 Cotton sweater A 3.5 3.5 " B 1.5 2.5 " C 2.5 3.5 " D 1.5 1.8 " E T 1.5 So , ,.

Unbleached muslin A OWE 3.5 " B 1.8 2.0 " C 3.0 3.5 " D 1.0 2.0 S " E T 2.0 Underwear A 2.5 4.0 " B 1.5 2.5 " C 2.5 3.8 " D 1.5 2.5 " E 0 2.5 White T-shirt A T 2.5 " B 0 1.0 " C T 2.5 " D 0 lo " E 0 T
Compositions B, D and E of the invention all caused less staining of the cotton fabrics.
EXAMPLE X
Brightener staining was evaluated as described in Example IX using the following compositions.
Composition = Composition C of Example IX
Composition = Composition E of Example IX
Composition C = Composition D of Example IX
Composition D = Composition C of Example IX, except replace indicated brighteners with 0.2~ of sodium 4,4'-bis((4-anilino-6-morpholino-1,3,5-triazin-2-yyule-amino) 2,2'-stilbene sulfonate.
Composition E = Composition C of Example IX, except replace indicated brighteners with 0.2% of 4,4' Bessel-30 anilino-6-morpholino-1,3,5-triazin-2-yl)amino)-2l22'-stilbene. (Brightener not solubilized in composition.) Composition F = Composition C of Example IX, except replace indicated brighteners with 0.2% of disodium 4,4'-bis((4-anilino-6-morpholino-1,3,5-triazin-2-yye)-amino)-2,2'-stilbene disulfonate.

Sue . .

Composition G = Composition D, except with only 0.15% of the indicated brightener.
Composition H = Composition F, except with only 0.15% of the indicated brightener.
The results were as follows.
Fabric Composition Grade 10 mender overnight/damp Coarse weave cotton A 4.0 4.0 " B 1.5 2.0 " C 2.5 2.5 D 2.0 3.0 " E 4.0 1.5 " F 4.0 4.0 I. G 1.5 3.0 H 2.0 4.0 Cotton sweater A 4.0 4.0 " B 1.0 2.5 " C 1.5 3.0 " D 2.5 3.5 " E 2.0 1.5 " F 4.0 4.0 " G 2.5 3.0 .0 4.0 25 Unbleached muslin A 3.5 4.0 " B 0 2.5 .. C 1.5 3.5 " D 2.0 3.5 if E 0 1.0 " F 3.5 4.0 " G 2.5 2.5 " H 3.0 3.5 Underwear A 2.0 4.0 " B T 2.0 " C T 2.5 if D T 3.0 355~i3 " E T 0 " F 2.5 4.0 " G 2.0 3.0 " H 3.0 4.0 White T-shirt A 0 3.0 " B 0 0 " C 0 1.5 " D 0 2.5 " E 0 0 " F T 3.0 " 0 3.0 " H 0 3. 0 Compositions By C, D and G of the present invention caused less staining of the cotton fabrics. While the preferred monosulfonated brightener in Composition B
causes less staining than the brightener in I, the brightener in G provides better whitening performance.
EXAMPLE XI
Brightener staining was evaluated as described in Example IX using the following compositions.
Composition A = Composition C of Example IX
Composition B = Composition E of Example IX
Composition C = Composition D of Example IX
Composition D = Composition C of Example IX, except replace indicated brighteners with 0.2~ of disodium 2,2-(4,4 7 -biphenylene divinylene)-dibenzene sulfonate.
Composition E = Composition C of Example IX, except replace indicated brighteners with 0.12~ of sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilben~sulfonate and 0.06~ of disodium 2,2~(4,4'-biphenylene divinylene)-dibenzenesulfonate.
Composition _ = Composition C of Example IX, except replace indicated brighteners with 0.15% of sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbenesulfonate and 0.02% of disodium 2,2-(4,4'-biphenylene divinylene)-dibenzenesulfonate.

~3~53 .. ..

Composition G = Composition C of Example IX, except replace indicated brighteners with 0.096% of sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbenesulfonate and 0.088~ of disodium 2,2-(4,4'-biphenylene divinely-S ene)-dibenzenesulfonate.
The results were as follows.
Fabric Composition Grade 10 min/dryoverni~ht/damp Coarse weave cotton A 3.5 4.0 " B 1.5 2.0 " C 2.0 2.5 " D 3.0 4.0 " E 2.5 2.0 I' F 2.0 1.5 " G 4.0 2.5 Cotton sweater A 3.0 4.0 " B 1.0 2.0 " C 1.0 2.5 " D 3.0 4.0 " E 2.5 3.5 " 2.5 2.0 " G 2.5 2.5 Unbleached muslin A 2.0 3.0 " B T T
" C T 1.5 " D 2.5 3.5 " E 1.0 2.0 " F T 1.5 " G 1.5 1.0 Underwear A 1.5 3.5 " B 0 1.0 " C T 1.0 " D 2.0 3.5 " E T 2.0 " F T 2.0 " G 1.5 2.5 ~35~53 . .

White T-shirt A T 2.5 " C 0 1.0 " D T 3.0 " E 0 1.0 " F T T
" G T 2.0 Compositions B, C, E and F of the present invention caused less staining of the cotton fabrics.
EXAMPLE XII
Brightener staining was evaluated as described in Example III using the following compositions.
Wt.
Component A B C D _ F
5 C14-15 alcohol polyethoxylate (7)40.040.040.0 30.0 5.0 5.0 Sodium C13 linear alkylbenzene sulfonate - 10.0 5.0 5.0 20 Coconut alkyd diethanolamide -I 0.5 0.5 C12-1~ fatty acid 5.6 5.65.6 5.6 --- ___ Sodium purify-phosphate --- - 5.0 5.0 25 Sodium borax --- -I --- 2.0 2.0 Ethanol 3.0 3.0 3.03.0 --- ---Diethylene glycol monobutyl ether 12~0 12.012.0 12.0 --- ---Propylene glycol10.010.0 10.010.0 --- ---Triethanolamine 5.0 5.0 5.05.0 --- ---Sodium car boxy-methyl cellulose --- --- - - --- 0.5 0.5 Sodium hydroxide --- --- --- 0.02 0.59 0.59 Sodium 4-(2H-naphtho-[1,2-d]triazol-2-yl)-2-stilbene-sulfonate 0.18 --- 0.120.18 1.0* ---. .

Disodium Boyce-((aniline-methylhydroxyethyl-amino-l,3,5-triazin-2-yl)-amino)-2,2'-stilbene disulfonate --- 0.18 0.06 --- -- lo Water Balance to l00 *Brightener not in solution.
The results were as follows.
Grade - lo mender Fabric A B C D E F
Coarse weave cotton lo 2.5 lo lo lo 3.0 Cotton sweater 2.0 3.0 3.0 T T 3.5 Unbleached muslin T 2.5 2.0 lo lo 2.0 Underwear T lo lo 0 0 lo White T-shirt 0 0 0 0 0 T
Only Composition D is within the scope of the present invention although the monosulfonated brightener also provided reduced staining in A Which did not contain an anionic surfactant) and E which was not a stable isotropic liquid).
EXAMPLE XIII
Brightener staining was evaluated as described in Example XI in the following composition.
25 Component Wt. %
Clue linear alkylbenzene sulfonic acid 7.2 Cl4_l5 alkyd polyethoxylate lo sulfuric acid l0.8 Clue 13 alcohol polyethoxylate (6.5)S.5 on Cl2-l4 fatty acid l5.0 Citric acid (an hydrous) 4.6 Sodium diethylenetriamine pentaacetate 0.6 TAIPEI* 1.0 Monoethanolamine 7.0 35 Sodium hydroxide lo Potassium hydroxide 0,94 :~L235S5~

Propylene glycol 4.0 Ethanol 6.5 Sodium format lo Calcium hydroxide 0.15 Brightener As indicated Minors and water Balance to 100 *Tetraethylene pentaimine ethoxylated with 15-18 moles (avg.) of ethylene oxide at each hydrogen site.
Brightener A = 0.12~ disodium 4,4'-bis~(4-anilino-6-methylhydroxy-ethylamino-1,3,5-triazin-2-yl)amino)-2,2'-stilbenee disulfonate + 0.06% disodium 2,2-(4,4l-biphenylene divinylene)-dibenzenesulfonate B = 0.18% sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbenesulfonate C = 0~15~ sodium 4-(2H-naphtho[lJ2-d] triazol-2-yl)-2-stilbenesulfonate + 0.02% disodium Boyce-anilino-6-methylhydroxyethylamino-1,3,5-triazin-2--yl)amino)-2,2'-stilbene disulfonate D = 0.15% sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbenesulfonate 0.02% disodium 2,2-l4,4'-biphenylene divinylene)-dibenzenesulfonate E = 0.12% sodium 4-(2H-naphtho[1,2-d] triazol-2-yl)-2-stilbenesulfonate + 0.06% disodium 2,2-(4,4'-biphenylene divinylene)-dibenzenesulfonate The results were as follows.
Fabric Composition Grade 10 mender overnight/damp Coarse weave cotton A 2.8 4.0 " B T 2.5 " C 2.0 2.9 " D 0.5 3.1 .. E 1.5 3.3 ~s~s3 Cotton sweater A 2.7 4.0 " B T 2.7 " C 1.3 3.2 " D T 3.3 " E 0.5 3.3 Unbleached muslin A 2.0 3.0 " B T 2.0 " C 1.0 200 " D T 2.0 " E T 1.3 Underwear A 2.0 3.5 " B 0 2.2 " C T 1.8 " D T 1~5 " E T 1.0 White T-shirt A T 1.5 " B 0 T
" C 0 T
if D 0 0 " E 0 T
Unbxightened cotton knit A 1.5 3.8 B T 2.4 C 0.8 3.0 D T 3.1 E 0.3 3.3 UnbrightPned cotton knit A 2.0 3.8 (bleached) B 0 1.3 C T 1.1 E 0.3 1.0 Compositions B, C, D and E of the present invention caused less staining of the cotton fabrics.
WHAT IS CLAIMED IS-

Claims (12)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A stable isotropic liquid laundry detergent composi-tion comprising, by weight:
(a) from about 3% to about 50% of an anionic synthetic surfactant; and (b) from about 0.01% to about 1% of a monosul-fonated brightener which represents at least about 60% of the total brightener in the composition;
said composition containing less than about 2% of quater-nary ammonium cationic surfactants having 2 chains, each containing an average of from about 16 to about 22 carbon atoms.

2. A composition according to Claim 1 wherein the monosulfonated brightener represents from about 75% to about 95% of the total brightener in the composition.

3. A composition according to Claim 2 wherein the monosulfonated brightener represents from about 85% to about 90% of the total brightener in the composition.

4. A composition according to Claim 1 comprising from about 15% to about 25% of the anionic synthetic surfac-tant, which comprises a C10-C18 alkyl sulfate containing an average of from 0 to about 4 ethylene oxide units per mole of alkyl sulfate, a C11-C13 linear alkylbenzene sulfonate, or mixtures thereof.

5. A composition according to Claim 4 comprising from about 0.1% to about 0.3% of the monosulfonated brightener.

6. A composition according to Claim 5 further compris-ing from about 4% to about 15% of a nonionic surfactant which is a condensation product of a C12-C15 alcohol with from about 3 to about 8 moles of ethylene oxide per mole of alcohol.

7. A composition according to Claim 6 further compris-ing from about 5% to about 20% of a C10-C22 fatty acid.

8. A composition according to Claim 7 wherein the monosulfonated brightener is sodium 4-(2H-naphtho[1,2-d]triazol-2-yl)-2-stilbenesulfonate.

9. A composition according to Claim 8 wherein the monosulfonated brightener represents from about 80% to about 95% of the total brightener in the composition.

10. A composition according to Claim 7 wherein the monosulfonated brightener is sodium 4,4'-bis((4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino)-2,2'-stilbene-sulfonate.

11. A composition according to Claim 1 being substan-tially free of quaternary ammonion cationic surfactants having 2 chains, each containing an average of from about 16 to about 22 carbon atoms.

12. A composition according to Claim 1 being substan-tially free of phosphate materials.