JPH07509501A - Granular laundry detergent and detergent builder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Granular laundry detergent and detergent Bilgoo field of invention The present invention relates to phosphate-free granular laundry detergents and in particular The present invention relates to such detergents having improved cleaning power.

background Granular laundry detergents or laundry powders typically contain (A) one or more tables. Surfactants such as alkyl sulfates, alkyl ethers of sulfates, alkylbenzenes Sulfonates, Nidoxylated alkylphenols, Ethoxylated alcohols, or amine oxides, and one or more of (B) Detergent building blocks, such as sodium tripolyphosphate, sodium nitrilotriacetate, or sodium aluminum silicate. Phosph in these detergents Although the use of esters is known to be undesirable from an environmental point of view, Phosphate obtained by replacing the phosphate builder with another builder Detergents that do not contain salt suffer a significant loss in cleaning power due to this displacement.

Summary of the invention Ethoxylated fatty alcohols, anionic surfactants, and formula RR'R 'NO [wherein R is a primary alkyl group having 8 to 24 carbon atoms, R' is methyl, ethyl, or 2-hydroxyethyl, and R'' is independently methyl, ethyl, selected from methyl, 2-hydroxyethyl, and primary alkyl groups having 8 to 24 carbon atoms. Some carefully formulated mixtures of amine oxides corresponding to Has cleaning performance comparable to that of laundry detergents containing phosphates. Contains phosphate-free sodium aluminum silicate (zeolite) It has been discovered that it is possible to provide a granular laundry detergent that

The amine oxide is such that R' and R' are independently methyl, ethyl, and 2-hydro. The zeolite is selected from xyethyl and it is Formulated to give 2.3-7.0 mmol of amine oxide per light When washed, it increases the rate of divalent metal ion sequestration of the zeolite and Anionic surfaces from solutions when using laundry detergents due to the use of formulations in laundry detergents It has also been discovered that early precipitation of the activator is reduced.

Therefore, the present invention (A) (1) 1-30% by weight of surfactant, (2) 1-50% by weight of alkyl silicate minium sodium detergent builder, (3) 1-20% by weight sodium silicate, ( 4) 0.1-5% by weight of anti-redeposition agent and 1-75% by weight of alkyl carbon Alkali metal or alkyl benzene sulfonate having a number of 10-18 ammonium salt, and 1-20% by weight of one or two long-chain alkyl groups. or (2) 85-98% by weight of Etkinre 1-12% by weight fatty acid soap, and 1-6% by weight amine oxide. a phosphate-free granular laundry detergent consisting of; (B) suitable for use in laundry detergents and (1) per gram of zeolite. 2.3-7.9 mmol per amine containing only one long-chain alkyl group as described above. amine oxide and (2) O-amine oxide/zeola containing only 30% water. The surfactant mixture preferably comprises 1-30% by weight of laundry detergent in total. Used in such an amount as to constitute 10-20 cores of detergent weight, and preferably When the surfactant is anionic surfactant is alkylbenzene sulfonate is at least 80% by weight ethoxylated fatty alcohol and 10% by weight and when the anionic surfactant is a fatty acid soap. from at least 90% by weight of ethoxylate and up to 5% by weight of each other component The ingredients are distributed accordingly.

Ethoxylated fatty alcohols that can be used in the practice of this invention include formula Z (OCJH2)nOH1 In the formula, Z has 4-30 carbon atoms, preferably 10-1 carbon atoms. 8, and n is an integer of 1-50, preferably 2-15. It is a general compound corresponding to Particularly suitable ethoxylated fatty alcohols Coles are (1) ethoxylates of mixtures of CG and CIO alcohols where n is 3; sylate, (2) ethos of a mixture of CI2 and CI4 alcohols where n is 3; Mixture of xylate and (3) C12 and CI4 alcohols where n is 6 It would be the ethoxylate of a substance. However, other ethoxylates corresponding to this formula substances such as butanol, isobutanol, hexanol, octatool, Canol, dodecanol, tetradecanol, pentadecanol, hexadecano ol, octadecanol, eicosanol, docosanol, tetracosanol, and one or more alcohols such as triacontanol. You can also use

The alkylbenzene sulfonate component of laundry detergent has an alkyl group with a carbon number of 10- Any alkali metal or ammonia of althylbenzene sulfonate which is 18 It is preferably a sodium dodecylbenzenesulfonate salt. It is um.

Fatty acid soaps can be any fatty acid salts, but are commonly known as soaps. common sodium salts, such as oleic acid, resinoleic acid, and 12-20 carbon fatty acids such as arilic acid, beef fatty acid mixtures, and coconut fatty acids salt, is. However, C1□ coconut soap is preferred.

Although the zeolite may contain chain alkyl groups, the rate of divalent metal ion sequestration is In order to increase the degree of It is preferable that the number of carbon atoms is 10-18, and that the number of carbon atoms is at least 18. also have a majority of linear chains, typically 70%, preferably at least 90% of the molecule. is such a group. Particularly preferred are those in which both R″ and R″ are methyl. These are amine oxides.

Amine oxides that can be used include, for example, N-octyldimethylamineoxy do, N, N-didecylmethylamine oxide, N-decyl-N-dodecylethyl Amine oxide, N-dodecyldimethylamine oxide, N-tetradecyldime Tylamine oxide, N-tetradecyl-N-ethylmethylamine oxide, N -tetradecyl-N-ethyl-2-hydroxyethylamine oxide, N,N- ditetradecyl-2-hydroxyethylamine oxide, N-hexadecyldime Thylamine oxide, N-hexadecyldi-2-hydroxyethylamineoxy do, N-octadecyl dimethylamine oxide, N, N-diniicone ruethyl acetate amine oxide, N-tocosyl-N-2-hydroxyethylmethylamine oxide , N-tetradecyldimethylamine oxide, and mixtures thereof. Ru. Particularly preferred is N-tetradecyldimethylamine oxide.

The amine oxides used in the practice of this invention are common amine oxides (all (i.e., produced as a dilute aqueous solution), but e.g. Preferably. Dilute aqueous solutions must be dried in the manufacture of washing powders. do not have. Furthermore, by blending amine oxide with zeolite, it is possible to sequester divalent metal ions. When increasing the chain velocity, the resulting mixture contains 0-30% water by weight. It is important that it is a powder rather than a paste.

The detergent builder used with the above surfactants is sodium aluminum silicate. and it is 1-5o% of the total weight of the laundry detergent, preferably 20-40%. %. Suitable zeolites, such as zeolites A, X, or Y, can be used as sodium aluminum silicate, but zeolite A Generally preferred.

The remaining essential ingredients of the laundry detergent are (1) up to 1-20% of the total weight of the detergent, preferably; (2) sodium silicate comprising 5-15%, preferably 0.1-5% of the total weight; 0.1-1% of an anti-redeposition agent, such as sodium polyacrylate. or sodium carboxymethyl cellulose, and (3) 10 of the weight of the detergent. - 80% of one or more inorganic fillers or processing aids, e.g. For example, sodium sulfate, sodium carbonate, or sodium bicarbonate. death However, if desired, the detergent may contain optional ingredients, such as one or more bleaching agents. Whitening agents, such as sodium percarbonate or sodium perborate, and one or more The ingredients of laundry detergents can be combined in any suitable way, but especially amine-based Zeolites and amine oxides are used when the cid contains only one long chain. Pre-blending and adding zeolite at a rate that increases the rate of sequestration of divalent metal ions. i.e. 2.3-7, preferably 3.1-5.4, or more per gram of zeolite. Preferably 3.5-4.7, and most preferably about 3.9 mmoles of amine oxide. It is often preferred to mix in proportions that provide cid. (1) Builders are common To be most effective, the detergent must function properly during the first two minutes of use. (2) in a cleaning composition containing an anionic surfactant. relative of traditional zeolite building blocks compared to phosphates as builders of The slow metal sequestration rates are particularly important at the relatively low cleaning temperatures (3 0-40°C) is much less desirable for zeolite production; Such an increase in on-blocking rate is significant.

These amine oxide/zeolite building blocks can be used in laundry detergents or other Anionic surfactants – same as traditional detergent builders in cleaning compositions In addition, a formulation can be prepared from which an anionic surfactant is added. has little tendency to precipitate early. Generally, such a cleaning composition will be (A) typically 1-25% by weight of one or more surfactants, 0- 25% by weight of one or more bleaching agents, such as H modifiers, such as sodium chloride 10-80% by weight of processing aids such as sodium sulfate. or sodium carbonate and 1-50% by weight of builder. , hard surface cleaners, and (B) Typically has the same ingredients as the hard cleaner in essentially the same proportions, but 0 ．． A laundry detergent also containing 1-5% by weight of one or more anti-redeposition agents. agent powder Contains.

The laundry detergents of the present invention contain (1) phosphates, which are already of environmental concern; and (2) contain uncommon ingredients that require new environmental or toxicity testing. However, it is comparable in performance to popular phosphate-containing detergents. It is advantageous in that it can Additionally, they are resistant to a wide range of soils and conditions. containing additional fabric softeners, such as the quaternary ammonium salts mentioned above. gives flexibility to laundered fabrics without the need for, and is already commercially available Laundry detergents containing phosphates and phosphate-free laundry detergents are in high demand. It can actually be cheaper than laundry detergent.

The following examples are presented to illustrate the invention and do not limit it. It is not intended to be. Unless otherwise stated, amounts given in the examples are by weight. It is.

Monitor the amount of calcium remaining in solution using a calcium ion-selective electrode. 0.10 g of 250 mL of an aqueous solution containing 500 ppm of calcium Stir with Zeolite A for 20 minutes at 22°C. End of 20 minute period There was a 1100 pp decrease in the calcium content of the solution at the time of completion, but the zeola No significant uptake of calcium by ItoA is seen at the critical 2 minute time point.

Part B-contrast 0.10 g of zeolite A was mixed with 0.10 g of N-tetradecyldimethylamine (CI Repeat part A except replace with 4AX). Final absorption of calcium is 30 pI)m, all of which is absorbed during the first 2 minutes. A was mixed with 0.20 g of CI 4, AX and 25/75E compound of zeolite A ( 1.3 mmol amine oxide/g zeolite) Repeat part A. (at the end of the 20 minute period, the calcium content of the solution There was a 1100 pp decrease in lum content, measurable within the first 2 minutes. There is no amount of calcium absorption.

Partial comparison Cl4Ax and 3/1 blend to zeolite (11,7 mmol Absorbed within the first 2 minutes.

1/1 blend of Zeolite A and C14AX (389 mmol amine oxy Repeat part C except using zeolite of Part A and C, 11 in the calcium content of the solution at the end of the 20 minute period. There was a decrease of 00pp. However, most of the calcium absorption i.e. 70 ppm occurs at the critical 2 minute time point.

Example 2 Formulations A and B (phosphate-free laundry detergents of the invention), Formulation C (phosphate-free laundry detergents of the invention); Control laundry detergent without phosphate) as well as Formulation D (containing phosphate) The specified parts of the ingredients shown in Table ■ to produce a control laundry detergent) Four laundry detergents were prepared from the same formulations, where two control formulations were used in commercial laundry detergents with high demand. Formulated to rival laundry detergent.

(1) Six standard dust-sebum soiled cotton/polyester swatches in one liter into a solution containing 200 ppm hard water (3/2 Ca"7Mg" ratio), 2) Add 15g of the detergent to be tested; (3) Drain the contents of the container for 10 minutes. (3) Wash the sample in hard water for 5 minutes. (4) Place the rinsed sample on a flat bed press. (5) Measure the reflectance of each sample using a turbotometer. (6) average the results, and (7) calculate the average reflectance and 0 vs. The cleaning power (L) of Example 2 was determined by calculating the difference between the Testing the cleaning performance of laundry detergents A, C, and D. Washing in one test For rinsing, we used a temperature of 38°C, which is the temperature commonly used for current volumes, and Two other tests should use temperatures of 22°C and 55°C. The test results are Shown in Table II.

Part B EMPAIOI (mixture of motor oil and charcoal) instead of dust-skin stained samples Repeat part A, except using a swatch contaminated with

The results of the test are shown in Table II.

Part C Part A except that a clay-stained swatch was used instead of a dust-sebum-stained swatch. repeat. The results of the test are shown in Table II.

The test results obtained with Formulation B are similar to those obtained with Formulation A. , in water with Ca hardness of <200 ppm and as shown above. Cleans when used in an amount comparable to one cup of detergent in a standard washing machine. It compares very well with highly sought after commercial laundry detergents in terms of cleaning performance. under The following examples were used for testing and varying the hardness of the water shown in Table III. Otherwise, when the test of Example 3 was conducted on a sample contaminated with dust and sebum at 38°C, This also shows an increase in the reflectance measured by the test.

Example 5 (1) Polyesters supplied by different manufacturers and with relatively high soil loads (2) Detergent usage lamination changes as shown in Table IV. When the test of Example 3 was repeated on the dust-sebum soiled sample, except that Both show an increase in the reflectance measured by the test.

Continuation of front page (51) Int, C1, 6 identification code Office reference number (31) Priority claim number 878,281 (32) Priority Exit May 4, 1992 (33) Priority claim country: United States (US) (81) Designated country: EP (AT, BE, CH, DE.

DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, SE), C A.JP I (72) Inventor Smith, Kim Earl 4675 for Indiana, USA 0 Huntington Brampton Drive 3203 (72) Inventor Borland , James E. Batonlouche E., Louisiana 70815, United States East Milburn 12253

Claims (1)

[Claims] 1. (A) 1-30% by weight ethoxylated fatty alcohol/anionic table A surfactant/amine oxide surfactant mixture, where the amine oxide has the formula RR' R''NO [wherein, R is a primary alkyl group having 8 to 24 carbon atoms, and R' is methyl ethyl, ethyl, or 2-hydroxyethyl, and R'' is independently methyl. , ethyl, 2-hydroxyethyl, and primary alkyl groups having 8 to 24 carbon atoms. (B) 1-50% by weight of sodium aluminum silicate detergent builder, (C) 1-20% by weight sodium silicate, (D) 0.1-5% by weight (E) 10-80% by weight of an inorganic filler. , the surfactant mixture contains (1) 20-98% by weight ethoxylate, 1-75% by weight of alkylbenzene sulfonate whose alkyl group has 10-18 carbon atoms in % Alkali metal or ammonium salts and 1-20% by weight of amine oxides or (2) 85-98% by weight of ethoxylate, 1-12% by weight of Phosphate, consisting of a mixture of fatty acid soap and 1-6% by weight of amine oxide. A granular laundry detergent that does not contain any additives. 2.10-20% by weight surfactant, 20-40% by weight builder, 5-15% by weight % sodium silicate and 0.1-1% by weight anti-redepositing agent. The detergent detergent according to item 1. 3. (A) Formula Z(OCHaCH2)nOH with at least 80% by weight surfactant [In the formula, Z is an alkyl group having 10 to 18 carbon atoms, and n is an integer of 2 to 15. ethoxylated fatty alcohols up to 10% by weight of dodecyl Sodium rubenzenesulfonate and up to 10% by weight of the formula RR'R''NO[ In the formula, R is a primary alkyl group having 8 to 24 carbon atoms, and R' and R'' are independently selected from methyl, ethyl, and 2-hydroxyethyl] (B) the detergent builder is zeolite A; (C) The anti-redepositing agent is sodium polyacrylate, sodium carboxymethane. selected from cellulose, and mixtures thereof; and (D) an inorganic filler. is selected from sodium sulfate, sodium carbonate, and sodium bicarbonate A laundry detergent according to claim 2, which is one or more compounds. 4. (A) C12 and C14 alcohols in which the surfactant is 90% by weight where n is 6; 5% by weight sodium dodecylbenzenesulfonate and 5% by weight of N-tetradecyldimethylamine oxide. (B) the anti-redepositing agent is sodium polyacrylate; and (C) A laundry detergent according to claim 3, wherein the inorganic filler is sodium carbonate. 5.20% by weight surfactant mixture, 30% by weight Zeolite A, 8% by weight Silicon sodium acid, 0.4% by weight sodium polyacrylate, and 41.6% by weight 5. Laundry detergent according to claim 4, consisting of % of sodium carbonate. 6. (A) Formula Z(OCH3CH2)nOH with at least 90% by weight surfactant [In the formula, Z is an alkyl group having 10 to 18 carbon atoms, and n is an integer of 2 to 15. Ethoxylated fatty alcohols corresponding to ] up to 5% by weight of C12 coconut child soaps, and up to 5% by weight of formula RR'R''NO [wherein R is 8-24 carbon atoms] and R' and R'' are independently methyl, ethyl, and 2-hydroxyethyl] (B) the detergent builder is zeolite A, and (C) the anti-redepositing agent is Sodium polyacrylate, sodium carboxymethylcellulose, and (D) the inorganic filler is sodium sulfate, sodium carbonate; One or more compounds selected from thorium and sodium hydrogen carbonate The laundry detergent according to claim 2, which is a compound. 7. (A) C12 and C14 alcohols in which the surfactant is 90% by weight where n is 6; 5% by weight of soap and 5% by weight of N-tetra (B) an anti-redepositing agent is a mixture of decyldimethylamine oxide; and (C) the inorganic filler is sodium carbonate. , the laundry detergent according to claim 6. 8.20% by weight surfactant mixture, 30% by weight Zeolite A, 8% by weight Silicon sodium acid, 0.4% by weight sodium polyacrylate, and 41.6% by weight 8. A laundry detergent according to claim 7, comprising % of sodium carbonate. 9. (A) Zeolite; (B) approximately 2.3-7.0 microns per gram of zeolite; Rimol's formula RR'R''NO [wherein R is a primary alkyl group having 6-24 carbon atoms] and R' and R'' are independently methyl, ethyl, and 2-hydroxy. selected from the group consisting of ethyl, and (C) an amine oxide corresponding to A mixture suitable for use in laundry builders, consisting of 0-30% water based on the weight of the mixture. Compound. 10. R is a primary alkyl group having 10-18 carbon atoms, and R' and R'' are chill, and the amount of amine oxide is 3.1- per gram of zeolite. A mixture according to claim 9, which is 5.4 mmol. 11. The amount of amine oxide is 3.5-4.7 mmol per gram of zeolite. 11. The mixture according to claim 10, wherein the mixture is 12. the amine oxide is N-tetradecyldimethylamine oxide and 12. A mixture according to claim 11, wherein the zeolite is zeolite A.