JPS62109899A - Builder contained liquid detergent - Google Patents

Abstract

Heavy duty liquid detergent compositions comprising a mixture of citrate and succinate builders provide excellent detergency performance without undue fabric build-up of precipitated salts.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to the use of alkyl- or alkenyl-succinates together with citrates as detergency builder ingredients.
1 kenyl-succeinatss).

Background patent literature describes alkyl- and alkenyl-succinates as surfactants (U.S. Pat.
．． 3,7! ;3 specification), in various liquid cleaners (UK Patent No. 1.! No. 2.≠62,7kg specification, etc.). U.S. Patent No. 3. See also Rizaa, agb specification.

British Patent No. 1,29J, 7! No. J describes solid laundry detergent compositions preferably containing 20% to lithium of such succinates as builders.

Various substituted succinates and "sulfur-succinates"
U.S. Pat. No. 3,91 for various similar uses;
No. 663, US Pat. No. 15, No. 75, and US Pat. No. 3,7, λg6.

Combinations with detergent ingredients consisting of various succinates are also known. GPO No. 79/9/ Specification and APO No. 7
0/'? Specification No. 0 and West German Patent No. 3 U03; 7
9/ Specification and West German Patent No. 7.7/7 J,
No. 37 specification examination.

In fact, the use of various carboxylate materials in solid and liquid cleaners is well known. British Patent No. 1 for amine soap mixtures. ! Ill, Near 6; British Patent No. 1, μ, 2? for zeolite/polycarboxylate mixtures; , /L7; U.S. Pat. No. 2.24'l, 103 for citrate and other carboxylate+soap mixtures; U.S. Pat. No. 3.4.3' for polysaccharide carboxylate detergency builders. U.S. Pat. No. 3J9g, No. 391 for various sulfur-succinate traps in dishwashing detergents; and British Patent No. 1.1 for combinations with clay softeners. See Da 00,191 specification.

It has now been discovered that the formulation of homogeneous liquid detergents containing alkyl- or alkenyl-succinates is fraught with difficulties. Succinate approx./7. ! Formulations containing more than 10% of the detergent surfactant are unstable or can only be stabilized by reducing the amount of detergent surfactant. Too little surfactant amount, or the wrong type of surfactant, can present problems with the grease stain removal performance of the formulation.

Furthermore, too much succinate in such formulations can result in excessive deposition of succinate builder on the fabric surface.

Superior overall product performance eliminates excessive fabric build-up (bull-
suitable and previously unrecognized combinations of known alkyl- and alkenyl succinate building blocks with citrate builders and surfactants, all suitably balanced to achieve the desired cleaning function without the use of It is the primary object and advantage of the present invention that is achieved from a liquid detergent product by.

SUMMARY OF THE INVENTION The present invention relates to homogeneous detergent compositions specifically designed for laundering fabrics. The compositions are commonly referred to as "heavy duty liquids" or rHDL's because they are designed to remove even the "heaviest" soil loads from fabrics when used in normal laundry operations.

The composition contains a fluid carrier medium, a detergent surfactant or a mixture of detergent surfactants, and optionally detergent enzymes and other conventional detergent ingredients, said composition comprising &) an anionic detergent surfactant 6 ~12% by weight, b) 2-6% by weight of a citrate detergency builder, and c) t~/3% by weight of an alkyl or alkenyl succinate detergency builder selected from C10''CI6 alkyl or alkenyl succinates. It is characterized by containing. Preferred compositions are those in which the citrate builder and succinate builder together constitute no more than 16% by weight of the composition. The composition has a pH range of 7. θ~? , (7, preferably 7.3 to &, &.

In a method embodiment, the present invention provides fabrics with an aqueous laundry solution [
The washing liquor comprises a method of washing fabrics by stirring in a solution containing at least 0.05% by weight of a composition of the type described above.

All ratios or percentages of ingredients disclosed herein are by weight, unless otherwise specified.

DETAILED DESCRIPTION OF THE INVENTION The essential components of the composition are alkyl- or alkenyl-
Succinates, citrate builders, and detergent surfactants. Optional detergent adjuvant ingredients, as well as fluid carrier media, etc., are all well known to those skilled in the art.

Preferred builders of the invention have the general formula R-CHI'C00H)CH2(COOH), where R is Cl0-c16 alkyl or alkenyl, preferably C1°-C16 (i.e. derivatives of succinic acid). ).

These succinate builders are preferably in their water-soluble salts, such as sodium, potassium, ammonium and alkanol ammonium salts (e.g. mono-, di-, or tri-ethanol ammonium salts).
used in the form of

Specific examples of succinate builders include lauryl succinate, myristyl succinate, palmityl succinate, 2-dodecenyl succinate (preferred), co-teto-2-decenyl succinate, and the like. do.

Citrate Builder - The citrate builder used in the practice of this invention includes any water-soluble salt of citric acid.

Such salts include, for example, sodium, potassium, ammonium or alkanol ammonium salts, as in the case of the succinate builders already mentioned. As will be seen below, cytrate builders are unique in their ability to prevent undue fabric build-up due to succinate builders.

In this regard, the highly preferred HDL compositions of the present invention contain cytrate J, 'y% as a builder.
(defined as citric acid) and 2-dodecenyl succinate10. contains a mixture of 1% and pI (range T
JJA7. Prescribed in J~ffj.

Do the detergent compositions of the present invention contain organic surfactants to provide cleaning benefits associated with the use of surfactants? It will contain.

As mentioned above, it is difficult to formulate stable homogeneous HDL containing effective amounts of detergent surfactants. Importantly, however, HDI, S or anionic surfactant bundles of at least 5 and preferably 7 to 1/2 to give true "heavy-duty" wash performance against a wide range of soils and stains. Highly desirable to contain.

Anionic detergent surfactants useful in the present invention include well-known synthetic alkylbenzene sulfonates (highly preferred in the present HDL'S), alkyl sulfates and alkyl ether sulfates, paraffin sulfonates, olefin sulfonates, alpha-sulfonates of fatty acids and fatty acid esters. α-sulfonates, and the like, which are well known from the cleaning art. Generally K, such detergent surfactants contain alkyl groups within the C2 to C18 range. Anionic detergent surfactants may be used in the form of their sodium, potassium, ammonium or alkanol ammonium salts.

The index of standard Tegist, such as Matsukacheon, contains a detailed restructuring of such classical detergent surfactants. C
Although 10-C14 alkylbenzene sulfonates are particularly preferred in the present invention, C1□-C18 paraffin sulfonates and C11-C18 alkyl sulfates can also be used in HDL compositions of the present invention.

Highly preferred HD containing anionic detergent surfactants
The L composition typically comprises a) C10-014 alkylbenzene sulfone)
tli ionic detergent surfactant 7-72% by weight, b) citrate detergency builder, 2-6% by weight, and C) C1o-C16 alkyl or alkenyl succinate (particularly 2-dodecenyl succinate) An alkyl or alkenyl succinate detergency builder selected from the salts of g~73 and has a pH of 7, J~ξ6.

In order to enhance the detergency performance of the HDLSs of the present invention, it is preferred that they also contain nonionic surfactants of the ethoxylated alcohol type, especially C1o-Cl3 alcohols ethoxylated with H-7 EO groups. Such compositions contain, in addition to the mixture of succinate and citrate builders, an anionic (especially alkylbenzene sulfonate) detergent surfactant and an ethoxylated alcohol nonionic surfactant. 70%-X)
Contains %. As mentioned above, such compositions with mixed anionic/nonionic surfactants are
H7, 0-9. θ, preferably 7.3 to &j. Most preferably, the composition contains no more than 6 citrate/succinate builders, as described above.

Fluid Carrier Medium The fluid carrier for the present compositions can consist of water, water/ethanol mixtures, water/glycol mixtures, etc., well known to HDL'S formulators. Typically, the HDL will contain a fluid carrier consisting of water, water, and ethanol.

Detergent auxiliaries The present compositions can contain other ingredients that aid their cleaning performance. For example, the laundry compositions of the present invention provide through-the-wash protection against a variety of soils and stains.
It is highly preferred to also include enzymes to enhance cleaning performance (through-the-wash). Amylase and protease enzymes suitable for use in detergents are well known in the art and in commercially available liquid detergents.

Commercial detergent enzymes (preferably mixtures of amylase and protease) typically range from 0.00/% to
It is used in amounts of 2% and higher.

Additionally, the compositions can contain, in addition to the ingredients already mentioned, a variety of other optional ingredients commonly used in commercial products to provide aesthetic or additional product performance benefits. Typical ingredients include pH modifiers, fragrances, dyes, optical brighteners, soil suspending agents, hydrotropes and gel control agents, freeze-thaw stabilizers, bactericides, preservatives, antifoam agents, etc. .

In the through-the-wash washing method, the composition is
Typically at least SOOppm, preferably 0.10 T~U, at pH 7-11 in an aqueous wash bath for washing fabrics! used at a concentration of Laundry is 5
It can be carried out by stirring the fabric with the composition over a range from 0.degree. C. to boiling with excellent results.

The following examples are representative of preferred compositions of the invention, but:
It is not intended to limit the scope of the invention.

Example I Preferred HDLs are as follows.

Ingredients % (weight)
2-dodecenyl succinate 10. Tafuenic acid 3.70 Soil release polymerゝo,s.

Diethylenetriaminepenta(methylenephosphonate) oogCaC
lz θ, 01 Sodium formate 0. Tatriethanolamine b, o.

NaOHj, A ethanol 6. θC12
Alkylbenzene sulfone) J, θ coconut alkyl sulfate Co, 5 ethoxylated C15
~15 alcohol (FO&) /7,0 oleic acid 3.7 enzyme
0. /j Water and trace components
Remaining product PH7A~72 Ax/, 1I-7 Produced by esterifying taric acid (chloride) with 12-propanediol and ethoxylating the polymer with ethylene oxide.

The resulting polymer mixture is fractionated in cold (/l''c) ethanol to give a cold ethanol soluble fraction with an average ethoxylation value D~tIj.

Claims (1)

Claims: 1. A homogeneous liquid detergent composition containing a fluid carrier medium, a detergent surfactant or a mixture of detergent surfactants, and optionally detergent enzymes and other conventional detergent ingredients, comprising:
The composition comprises: a) 7-12% by weight of an anionic detergent surfactant, b) 2-6% by weight of a citrate detergency builder, and c) an alkyl or alkenyl selected from C_1_0_-_1_6 alkyl or alkenyl succinates. A homogeneous liquid detergent composition characterized in that it contains 8-13% by weight of a succinate detergency builder. 2. The composition of claim 1, wherein the citrate builder and succinate builder together constitute up to 16% by weight of the composition. 3. Citrate and succinate builders are present in their sodium, potassium, ammonium or mono-, di- or tri-ethanol ammonium salts;
or a mixture thereof. 4. The composition according to claim 3, which is formulated at a pH of 7.0 to 9.0. 5. The composition according to claim 4, which is formulated at a pH of 7.3 to 8.6. 6. selected from a) 7-12% by weight of a C_1_0-C_1_4 alkylbenzene sulfonate anionic detergent surfactant, b) 2-6% by weight of a citrate detergency builder, and c) a salt of a C_1_0-C_1_6 alkyl or alkenyl succinate. A homogeneous liquid detergent composition according to claim 1, containing 8 to 13% by weight of an alkyl or alkenyl succinate detergency builder and having a pH of 7.3 to 8.6. 7. The composition according to claim 6, containing a mixture of citrate and 2-dodecenyl succinate as builder. 8. The composition comprises a) alkylbenzene anionic detergent surfactant 7-12
% by weight, and b) C_1 ethoxylated with 4 to 7 ethoxyl groups
A homogeneous liquid detergent composition according to claim 1 containing a mixture of detergent surfactants consisting of 10% to 20% ethoxylated alcohol nonionic surfactants that are _0 to C_1_5 alcohols. 9. The citrate and succinate builders are in the form of their sodium, potassium, ammonium or mono-, di-, or tri-ethanol ammonium salts, or mixtures thereof, and together form the composition. 9. A composition according to claim 8 comprising up to 16% by weight. 10. The composition of claim 9 formulated at a pH of 7.3 to 8.6. 11. The composition according to claim 10, containing as builder a mixture of 3.7% citrate and 10.4% 2-dodecenyl succinate.