JPH0357958B2 - - Google Patents

Abstract

The invention pertains to suspending aqueous built liquid detergent composition comprising an anionic detergent active, electrolyte salts and a fatty alcohol polyalkylene oxide, carboxylate salt. Inclusion of the carboxylate salt renders the rheology of the composition less sensitive to electrolyte materials.

Description

[Detailed description of the invention]

The present invention relates to liquid detergent compositions, in particular aqueous built liquid detergent compositions having detergent properties and comprising a suspension system capable of suspending insoluble substances.
(builtliquid detergent compositions). Aqueous built liquid detergent compositions are well known and numerous formulations have been disclosed in the prior art. Compositions of this type usually contain one or more detergent compounds and one or more builder salts, insoluble builder and/or adjuvant substances.
materials) in an aqueous medium in which they can be suspended. However, conventional built liquid detergents of this type have a significant drawback of significant sensitivity to electrolyte levels. Such sensitivity means that the size and location of the physically stable composition range and the tolerable viscosity range vary greatly depending on the amount of dissolved electrolyte. The use of large amounts, especially of more soluble builders such as NTA, usually makes the liquid unstable and prone to precipitation or phase separation. For these reasons, it is an object of the present invention to provide a composition of the aforementioned type, which is less sensitive to electrolyte substances and whose viscosity is acceptable even when larger amounts of such substances are used. be. Optionally replacing a portion of conventional anionic surfactants with relatively small amounts of certain fatty alcohol polyglycol ether-derived anionic surfactants improves the rheological sensitivity to electrolytes, especially builders and simple electrolyte salts. was found to decrease. Therefore, the present invention includes a synthetic anionic cleansing substance and an electrolyte salt, and has the following formula R-(OC _o H _2o ) _x -O(CH ₂ ) _y -COOM [wherein R represents 8 to 20 carbon atoms] or an aliphatic-aromatic hydrocarbon group having from 4 to 20 carbon atoms in the aliphatic part;
n is a number from 2 to 3, x is a number from 1 to 16, y is a number from 0 to 2, and M is a cation] Fatty alcohol polyalkylene oxide carboxylic acid salt or a mixture of these salts from 0.5 to
Provided is a liquid detergent composition containing an aqueous builder having a particulate matter suspending action, characterized in that the composition contains 10% by weight. The alkyl polyalkylene oxide carboxylic acid salt of the present invention is characterized by being represented by the following formula: R-(OC _o H _2o ) _x -O(CH ₂ ) _y -COOM. In the above formula R is an aliphatic hydrocarbon having 8 to 20 carbon atoms, or can also be an aliphatic-aromatic hydrocarbon having 4 to 20 carbon atoms in the aliphatic portion. R usually consists of a mixture of linear or branched, saturated or unsaturated aliphatic hydrocarbon groups of various lengths, preferably a linear saturated aliphatic hydrocarbon having 1 to 14 carbon atoms. The polyalkylene oxide moiety (OC _o H _2o ) _x is preferably an ethylene oxide unit (n=
2), but also propylene oxide or a mixture of propylene oxide and ethylene oxide (2<n3). The number (x) of ethylene and/or propylene oxide units is from 1 to 16, in particular from 1 to 12. The alkylene oxide moiety preferably contains 2 to 5 ethylene oxide units. The carboxylate moiety ((CH ₂ ) _y -COOM) is preferably free of alkyl chains (y=0), but may contain short alkyl chains such as methylene and ethylene. M is a cation selected from hydrogen, sodium, potassium, ammonium, mono-, di- and triethanolammonium;
Preferred are alkali metal cations. The detergent compositions of the present invention contain a fatty alcohol polyalkylene oxide carboxylic acid salt or a mixture of these salts in an amount of 0.5 to 10% to optionally replace a portion of the synthetic anionic detergent agent. The preferred amount depends on the rheology of the carboxylate compound-free composition and the desired rheology.
Typically, best results are obtained when 2 to 5% by weight of fatty alcohol polyalkylene oxide carboxylic acid salt is used in place of approximately the same amount of synthetic anionic detergent agent. The present invention is particularly applicable to aqueous liquid built compositions based on synthetic anionic detergent agents and electrolyte salts, where suitable synthetic anionic detergent agents include alkylaryl sulfonate type, alkyl Examples include known anionic detergents such as - and alkyl ether sulfate types, alkane and alkenesulfonate types, and the like.
Many other examples include Detergents and Surface-Active Agents by Schwartz, Perry.
Volume 1, 1958. Alkylarylsulfonates, preferably those in which the alkyl chain has 10 to 18 carbon atoms, such as n-dodecylbenzenesulfonate, tetrapropylenebenzenesulfonate, n-pentadecylbenzenesulfonate, and aliphatic Linear C ₁₂ − groups such as those obtained from decomposed wax polymers
C ₁₅ alkylbenzenesulfonic hydrochloric acid, both of which are used in the form of sodium or potassium salts. The total amount of synthetic anionic cleansing agents is 6-12% by weight of the total composition. The main cleansing active ingredients are the anionic substances mentioned above, but other cleansing active substances, especially non-ionic cleansing active substances, may also be used in small amounts. Non-ionic detergents are usually
Consists of a hydrophobic moiety reacted with alkylene oxide. Suitable are primary or secondary, linear or branched _C8 - _C18 alcohols fused with 1 to 30 mol of alkylene oxide; mono- or dialkylphenols having ~18 carbon atoms, _C10 - _C18 fatty acid mono- or dialkylolamides condensed with 1 to 30 moles of alkylene oxide, block copolymers of different or identical alkylene oxides, etc. Can be mentioned. The alkylene oxide is usually ethylene oxide, but propylene oxide or a mixture of ethylene oxide and propylene oxide may also be used. Other suitable examples are M.
Listed in "Nonionic Surfactants" by M. Schick. The amount of nonionic detersive agent that may be incorporated into the compositions of the invention is up to 5%, but must be less than the amount of synthetic anionic detersive agent. The electrolyte used in the present invention is one that causes partial salting out of the cleaning agent. The compositions according to the invention may normally contain from 1 to 60% by weight, preferably from 3 to 50% by weight, particularly preferably from 5 to 30% by weight of electrolyte. Representative examples include builder salts such as alkali metal ortho- and pyrophosphates, alkali metal ammonium tripolyphosphates such as sodium tripolyphosphate, alkali metal citrates,
Examples include alkali metal salts of nitrilotriacetic acid and alkali metal salts of carboxymethyloxysuccinic acid. Suitable electrolytes also include buffers such as alkanolamines, especially triethanolamine, alkali metal carboxylates, alkali metal borates, alkali metal silicates, and the like. The compositions of the invention furthermore contain all the ingredients normally included in products of this type, such as alkali metal sulphites to increase the detergency, enzymes alone or polyalcohols or alkanolamines used together with e.g. borax. enzymes, fluorophores, other builders such as zeolites, in combination with enzyme stabilizers such as
abrasives such as calcite, soil suspending agents, anti-redeposition agents, hydrotopes, corrosion inhibitors, foam increasing or reducing agents, emulsifying agents.
agents), fragrances, colorants, and bleaching agents, optionally in combination with bleaching agent precursors. Products of the invention may be manufactured using conventional techniques. In this case the product is post-stirring
It has been found advantageous to shear at the end of the manufacturing process until a maximum stable viscosity is obtained, such as by applying a viscosity or passing through a desintegrator or similar high-shear exerting equipment.
Products treated in this way do not suffer from viscosity effects when subjected to further shear during pumping and bottling operations. Next, the present invention will be explained with reference to Examples. All percentages shown herein are percentages by weight based on the final composition. EXAMPLES According to the formulations listed in Table 1, compositions with high physical stability and significantly higher tolerance to high electrolyte levels were prepared.

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remaining water

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Claims (1)

[Scope of Claims] 1 Synthetic anionic detersive agent of alkylaryl sulfonate having 10 to 18 carbon atoms in the alkyl chain 6 to 12% by weight and 1 to 60% by weight of electrolyte salt
An aqueous built liquid detergent composition capable of suspending an insoluble builder and/or auxiliary particulate material comprising: R-(OC _o H _2o ) _x -O(CH ₂ ) _y -COOM represents an aliphatic hydrocarbon group having 8 to 20 carbon atoms, or an aliphatic-aromatic hydrocarbon group having 4 to 20 carbon atoms in the aliphatic part;
n is a number from 2 to 3, x is a number from 1 to 16,
y is a number from 0 to 2, and M represents a cation] The composition is characterized in that it contains 0.5 to 10% by weight of a fatty alcohol polyalkylene oxide carboxylic acid salt or a mixture of these salts. 2. The composition of claim 1, wherein R is a straight chain saturated hydrocarbon group having 1 to 14 carbon atoms. 3 Claim 1 or 2 in which n is 2
The composition described in Section. 4. A composition according to any one of claims 1 to 3, wherein x is a number from 2 to 5. 5 Claims 1 to 4 in which y is 0
The composition according to any of paragraphs. 6. The composition according to any one of claims 1 to 5, wherein 6M is an alkali metal ion. 7. A composition according to any one of claims 1 to 6, comprising 2 to 5% by weight of fatty alcohol polyalkylene oxide carboxylate. 8. Claims 1 to 7 further comprising up to 5% by weight of a nonionic cleansing agent, the amount of nonionic cleansing agent being less than the amount of the synthetic anionic cleansing agent. The composition according to any one of the above.