DK143411B - CLEAR LIQUID DETERGENTS CONTAINING TENSIDES BUILDERS HYDROTROPS AND OPTICAL DETAILS - Google Patents

Description

14341 1

The present invention relates to a clear liquid detergent containing surfactants, builders, hydrotropes and optical brighteners.

Liquid detergents and especially liquid detergents containing chemical bleaching agents and / or clearing agents are known. Recently, such agents have contained a surfactant in combination with a detergent or bleaching agent dispersed therein. However, it should be noted that such dispersion presented several difficulties with respect to uniform distribution and, furthermore, uniform concentration of optical clarifier contained therein.

Furthermore, chemical bleaching cannot usually be used to make nitrogenous substances present either in the form of natural animal fibers such as wool or silk or synthetic fibers such as polyamides, for example, nylon, white or clear pg. of the detrimental effects on the clothing or the relative inefficiency of such bleaching processes.

Applying the clothing to an appropriate fluorescent compound which, by virtue of bluish fluorescence, counteracts the matte, yellowish shades of the clothing is a logical solution to the problem of improving the whiteness and clarity of the clothing. However, appropriate choices and satisfactory application of the optical clarifier present a number of problems. The fluorescent compound must be compatible with and must not damage the clothing and must provide appropriate fluorescence. It must be compatible with the detergents used as detergents. It must have affinity for the clothing and must be applied in a solution which either does not inhibit such affinity or preferably enhances such affinity. However, when applied to the clothing, the fluorescent compound must be applied evenly and uniformly, as the appearance of the treated clothing is otherwise stained and uneven.

Heretofore, it has been found that in order to obtain the desired uniform uniform distribution thereof, the optical clarifier must be 2 U3A11 dispersed in a suitable solution. When the clearing agent is a water-insoluble compound, such a requirement presents the additional problem that such clearing agents must be made soluble.

For practical and economic reasons, and because of the final mode of delivery, such ready-to-use products have so far been packaged and sold in highly concentrated form. Solubilization of water-insoluble fluorescent compounds has therefore been a very difficult problem so far, especially in view of the fact that high concentrations of such compounds should be incorporated into a concentrate for subsequent dilution with large amounts of rinsing or washing water to obtain an effective concentration of clarifying agent.

From the disclosure of U.S. Patent No. 2,877,185, liquid detergents containing surfactants, builders, hydrotropes and optical clarifiers are known, but there is not included a co-solvent system for the detergent to obtain the detergent of the present invention surprisingly good and uniform distribution and concentration of the cleaning agent and the resulting good and uniform cleaning effect on the laundry.

A clear liquid detergent containing surfactants, builders, hydrotropes and optical brighteners according to the invention is characterized in that it consists essentially of from 1 wt.% To 40 wt.% Of a water-soluble anionic synthetic surfactant, from 1 wt.% To 50 wt. % of a water-soluble salt of an aminocarboxylic acid, from 1% to 40% by weight of a hydrotrope selected from the sodium, potassium and ammonium salts of xylenesulfonic acid, toluenesulfonic acid, ethylbenzenesulfonic acid and cumensulfonic acid, from 1% to 20% by weight an ethoxylated Cg _ fatty alcohol with 2-200 moles of ethylene oxide, from ca. 0.01% by weight to approx. 0.5 wt% 30 of an anionic optical bone of the stilbene type and from 1 wt% to 20 wt% of a compound selected from dimethyl sulfide oxide and ethylene glycol monoalkyl ethers and ethylene glycol dialkyl ethers, said ethers having alkyl groups having from 1-4 carbon atoms , and water.

As mentioned, a detergent according to the invention contains optically clearing agents. Such optical clarifiers are generally classified as anionic fluorescent dyes which serve to impart increased fluorescence and / or optical clarifiers to both hydrophilic and hydrophobic fibers. Typical representative examples thereof therefore include disodium Ν, Ν'-bis-2-diethanol = amino-4-phenylamino-1,3,5-triazyl [6] -4,4'-diaminostilben-2,2-disulfonate. , disodium N, N'-bis- (2-morpholino-4-phenylamino-1,3,5-triazyl- [6] -4,4'-diaminostilben-2,2'-disulfonate, disodium N, N ' * bis- (2,4-diphenylamino-1,3,5-triazyl- [6] -4,4'-diamino-stilben-2,2'-disulfonate, disodium-4,4'-bis- 4-Anilino-6- (N-methyl-N-hydroxyethylamino) -s-triazin-2-ylamino] stilben disulfonate, disodium 4,4'-bis- [4-phenyl-2,1,3-triazole-2 -yl) stilbene disulfonate, disodium 4,4'-bis- [4-anilino-6- (N-2-methyl-2-hydroxyethylamino) -s-triazin-2-ylamino] stilbene disulfonate and sodium 2- (stilbyl) -4 '') - naphtho-1 ', 2', 4,5) -1,2,3-triazole-2 'sulfonate. Other suitable anionic fluorescent dyes are disclosed in the specification of South African Patent No. 66/2892 and in U.S. Patent Nos. 2,376,743, 2,612,501, 2,762,801, 2,784,183, and 3,012,971, the contents of which 20 of these writings are to be construed as pored in the present text by the above mention thereof. Also suitable for use in connection with the novel clear liquid detergent of the invention are other well-known anionic type boning agents in addition to those listed above.

In addition to the clearing agent, the detergent of the invention also includes anionic surfactants. Suitable anionic surfactants include such substances as alkylbenzenesulfonic acid and salts thereof and compounds of the formula alkylphenyl-SO3-M, wherein alkyl is an alkyl group of a fatty acid M of hydrogen or an alkali metal, which compounds comprise a well known group of anionic surfactants and include sodium dodecylbenzene sulf = phonate, potassium dodecylbenzenesulfonate, sodium laurylbenzenesulfonate and sodium cetylbenzenesulfonate; Others are the alkali metal salts of the higher alkylsulfonic acids and the alkali metal dialkylsulfosuccinates, e.g. sodium dioctylsulfosuecinate and sodium dihexylsulfosuccinate, sodium sulfoethyl phthalate, sodium oleyl p-anisidine sulphonate, sodium tetradecane sulphonate, sodium diisopropylnaphthalenesulphonate, sodium octylsulphenoxyalphenoxyethyl phenoxyethylene sodium laryl sulfate and the like.

Among the aforementioned alkylbenzenesulfonic acids and salts thereof, the preferred compounds include those which are biodegradable and which can be characterized in particular by a linear alkyl substituent having 10-22 carbon atoms preferably from 12-15 carbon atoms. Of course, it is to be understood that the carbon chain length generally represents an average chain length, since the process of producing such products usually involves the use of mixed chain length alkylation reagents. It will be understood, of course, that substantially pure olefins as well as alkylating compounds used in other techniques can and will give alkylated benzenesulfonates, wherein the alkyl portion has substantially (i.e., at least 99%) a chain length, e.g. C 3 or 3.

The linear alkylbenzene sulfonates are further characterized by the position of the benzene ring in the linear alkyl chain, with any of the position isomers (i.e., α - Ω) being usable and considered.

The linear alkylbenzene sulfonates are commonly and conveniently used by sulfonating the corresponding alkylbenzene = hydrocarbons which in turn can be prepared by alkylating benzene 25 with a linear alkyl halide, a 1-alkene or a linear primary or secondary alcohol. Pure isomers (of the 1-phenyl isomer) are prepared by reducing the acylated benzene (alkylphenyl = ketone) using a modification of the Wolff-Keshner reaction. The 2-phenyl isomer is obtained from n-undecylphenylketone 30 and methyl magnesium bromide to form the tertiary alcohol which is dehydrated to the alkene and then hydrogenated. The 5-phenyl isomer is similarly obtained from an n-heptylphenyl ketone and n-butyl magnesium bromide. The other isomers are similarly obtained from the appropriate n-alkylphenyl ketone and n-alkylmagnesium bromide.

5 1 A3A11

In addition to the benzenesulfonates, the lower alkyl (C1-C4) analogs of benzene such as toluene, xylene, trimethylbenzene, ethylbenzene, isopropylbenzene and the like can be used. The sulfonates are commonly used in the water-soluble salt form which, as the cation, comprises the alkali metals, ammonium, and lower amine and alkanolamine.

Examples of suitable linear alkylbenzene sulfonates: sodium n-decylbenzene sulfonate sodium n-dodecylbenzenesulfonate sodium n-tetradecylbenzenesulfonate sodium n-pentadecylbenzenesulfonate sodium n-hexhexadecylbenzene sulfonate said cations. Naturally, mixtures of these sulfonates may also be used with mixtures comprising compounds in which the linear alkyl chain is less or longer than that given, provided that the average chain length of the mixture is in accordance with the particular requirements of C q to C22 · 20 The linear paraffin sulfonates are also a well-known group of compounds and include water-soluble salts (alkali metal, amine, alkanolamine and ammonium) of: 1-decane-sulfonic acid 1-dodecane-sulfonic acid 1-tridecane-sulfonic acid 1-tetradecane-sulfonic acid 1-pentadecane sulfonic acid 1-hexadecane sulfonic acid as well as the other position isomers of the sulfonic acid group.

In addition to the paraffin sulfonates illustrated above, 6 U3411 others may be used in the ordinary range of C 1-6 to C 2 alkyls, the most preferred range being from C 2 to C 2 Q.

The linear alkyl sulfates contemplated by the present invention include the range from to. Particular examples include sodium n-decyl sulfate, sodium n-dodecyl sulfate, sodium n-hexadecyl sulfate, sodium n-heptadecyl sulfate, sodium n-octadecyl sulfate and the ethoxylated derivatives (1-100 moles of ethylene oxide) and of course the other water-soluble salt-forming cations mentioned above.

The agent of the present invention may contain coloring materials (dyes and pigments) and perfumes.

Furthermore, the agent contains a water-soluble salt of an amino = carboxylic acid such as e.g. nitrilotriacetic acid. It is used

ISLAND

preferably the trisodium salt thereof as the only building material 25 in connection with the present agent.

The preparation of the detergent of the invention can be accomplished by first adding the clarifiers to a solvent such as an ethylene glycol ether or dimethyl sulfoxide. Representative ethylene glycol ethers include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether and the like. Following the incorporation of the optical clarifier into either an ethylene glycol ether and / or dimethyl sulfoxide, an ethoxylated fatty alcohol is then added to the mixture, after which said mixture is heated to a temperature of about 25 ° C. 26 ° C to about 82 ° C so that the optical clarifier dissolves therein. Representative ethoxylated fatty alcohols which may be used in the present invention comprise fatty alcohols containing from ca. 2-200 moles of ethylene oxide such as e.g. octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pen = tadecanol and the like. After incorporation, the optical brighteners in the above-mentioned solvent system comprising an ethylene glycol ether and / or dimethylsulfoxide and an ethoxylated fatty alcohol using heat may then incorporate said clearing system into the remaining ingredients such that a clear liquid detergent is provided.

The detergent according to the invention includes, as mentioned, from approx.

5 0.01% by weight to approx. 0.5% by weight of detergent calculated on the basis of the weight of all ingredients in the finished detergent. Although the amounts of the remaining constituents are not critical for the purposes of the present invention, it should be noted that the detergent usually contains from 1 to ca. 40% by weight over-surfactant, from 1-50% by weight builder, from 1-40% hydrotrope, from 1 to 20% ethoxylated fatty alcohol, the remainder being made up of additives such as perfumes, colors and the like, as well as water.

In the following examples, the present invention is further elucidated.

Example 1

A clear liquid detergent was prepared containing:% by weight

Sodium tridecylbenzenesulfonate 2.5% ethoxylated fatty alcohol 7.5% nitrilotriacetic acid, trisodium salt 20.0% ethylene glycol monobutyl ether 2.0% 4,4'-bis [2,4-dianilino-s-triazinyl- (6) -amino] -stilben-2 , 2'-disulfonic acid, disodium = salt 0.2% 4,4'-bis-2- (3-methoxypropylamino) -4-anilino-s-triazinyl- (6) -amino] -stilben-2,2 ' -disulfone = acid, disodium salt 0.07% 4,4'-bis- [2-morpholino-4-anilino-s-triazinyl- (6) -amino] -stilben-2,2'-disulfonic acid, disodium = salted 0 , 03% ammonium cumene sulfonate 11.80% water and color, an amount sufficient to fill up to 100.0%

The above detergent was prepared by first providing the stilbene clarifiers with the ethoxylated fatty alcohol and the ethylene glycol monobutyl ether. The resulting mixture was then heated to 48.8 ° C for 15 minutes and then added to a mixture of deionized water, the tin sodium salt of nitrile triacetic acid and ammonium cumensulfonate. The remaining ingredients were then added and the resulting product turned out to be a clear liquid detergent.

Example 2

The agent of Example 1 was prepared again, however, replacing the ammonia - 0 umcumene sulfonate with sodium xylene sulfonate.

The agent was prepared as described in Example 1 and found to provide a stable clear liquid detergent containing clarifying agents.

Example 3

The agent of Example 1 was again prepared, replacing the ethylene glycol-colmonobutyl ether with 2% by weight of dimethyl sulfoxide. The resulting detergent again proved to be a clear liquid.

Example 4 The agent of Example 1 was again prepared, replacing the clarifiers used therein with mixtures of a disodium-N, N "-bis- (2-diethanolamino-4-phenylamino-1,3,5-triazyl) [6]) - 4,4'-diaminostilben-2,21-disulfonate, disodium 4,4'-bis- [4-anilino-6- (N-methyl-N-hydroxyethylamino) -s-triazine-2- ylami = 25 benzyl benzene disulfonate, disodium 4,41-bis- (4-phenyl-2,1,3-tri = azol-2-yl) -stylbenzene disulfonate, disodium 4,4'-bis- [4-anilino - 6-[(2-methyl-2-hydroxyethylamino) -s-triazin-2-ylaminol] stilben = disulfonate and sodium 2- (stilbyl-4 ') - naptho-1,2,4,5) 1,2,3-triazole-21-sulfonate The preceding substitutions provided clear liquid detergents.