JP3172754B2 - High bulk density granular detergent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high bulk density granular detergent composition having excellent solubility in cooling water.

[0002]

2. Description of the Related Art A conventional detergent for clothing contains a bulking agent (usually Glauber's salt), which hardly contributes to the washing performance, is added to a composition, and the bulk density is reduced to 0.1 by spray drying.
It was manufactured as bead-shaped hollow particles of about 3 g / cc.

[0003] However, such a detergent has a low specific gravity and a low concentration of an activator, so that the transportation cost is high, and a considerable space is required for storage and display. It was difficult to measure. Therefore, recently, a method for producing a high bulk density granular detergent which can be washed with a small amount of detergent has been proposed (JP-A-60-9).
No. 6698) and marketed.

[0004] However, the high bulk density granular detergent has a problem that the solubility is liable to be lowered because the detergent component is clogged into the inside of the detergent particles, not hollow particles like the spray-dried detergent.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to improve the solubility of a high bulk density granular detergent composition.

[0006]

SUMMARY OF THE INVENTION The high bulk density granular detergent composition of the present invention comprises a detergent base containing (a) an alkali builder, (b) an aluminosilicate and (c) an anionic surfactant. The (d) fatty acid ester type nonionic surfactant represented by Chemical Formula 2 is prepared by mixing the component (c) and the component (d) in a weight ratio of (c) / (d) = 7 to 0.25, and the component (c). And the component (d) are blended so that the total amount is 10 to 50% by weight, and the mixing and simultaneous crushing and granulation are performed in a mixing tank of a high-speed granulator capable of simultaneously performing stirring and crushing. It is characterized by being prepared.

[0007]

Embedded image (R₁CO: a saturated or unsaturated fatty acid having 6 to 22 carbon atoms
Residue R_Two: An alkylene group R having 2 to 4 carbon atoms_Three: An alkyl group having 1 to 4 carbon atoms n: OR_TwoRepresents the average number of added moles, and is a number of 5 to 30)

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The alkali builder of the component (a)
A carbonate, a silicate or the like is used, but it is preferable to use sodium carbonate, potassium carbonate or the like among alkali metal carbonates alone or as a mixture.
The alkali builder of the component (a) contains 1 in the detergent composition.
It is suitable to mix 0 to 50% by weight, preferably 20 to 40% by weight. If the amount is less than 10% by weight, the alkali content becomes insufficient due to stamina cleaning. On the other hand, if it exceeds 50% by weight, the pH of the cleaning solution becomes too high, causing problems such as rough hands.

As the aluminosilicate as the component (b), a crystalline or amorphous aluminosilicate represented by the following formula 3 or a mixture thereof is preferable.

[0010]

Embedded image x (M ₂ O or M′O) · Al ₂ O ₃ · y (S
iO ₂ ) .z (H ₂ O) (wherein M is an alkali metal atom, M ′ is an alkaline earth metal atom exchangeable with calcium, x, y and z represent the number of moles of each component, Generally, x is 0.7
-1.5, y is 1-3, and z is an arbitrary number. )

The average particle size of the aluminosilicate is desirably 5 μm or less, preferably 1 μm or less from the viewpoint of detergency. The aluminosilicate as the component (b) is preferably incorporated in the detergent composition in an amount of 5 to 40% by weight, more preferably 8 to 30% by weight. The following can be illustrated as specific examples of the anionic surfactant of the component (c).

(1) α-sulfofatty acid ester salt or fatty acid sulfonate disalt represented by the following formula:

[0013]

Embedded image (R: alkyl group or alkenyl group having 8 to 20 carbon atoms Y: alkyl group having 1 to 3 carbon atoms or counter ion Z: counter ion)

(2) linear alkyl benzene sulfonate having an alkyl group having an average of 8 to 16 carbon atoms, (3)
Α-olefin sulfonate having an average of 10 to 20 carbon atoms,
(4) an alkyl sulfate having an average of 10 to 20 carbon atoms,
(5) a linear or branched alkyl or alkenyl group having an average of 10 to 20 carbon atoms, and an average of 0.5 to 8;
Alkyl ether sulfate or alkenyl ether sulfate to which moles of ethylene oxide are added, (6) saturated or unsaturated fatty acid salt having an average of 10 to 22 carbon atoms.

As a counter ion in the above-mentioned anionic surfactant, an alkali metal salt such as sodium or potassium is usually suitable. The ester type nonionic surfactant of the component (d) is represented by the following structural formula (5).

[0016]

Embedded image (R₁CO: 6 to 22 carbon atoms, preferably 10 to 10 carbon atoms
18 saturated or unsaturated fatty acid residues, straight chain
Or branched R_Two: Alkylene having 2 to 4 carbon atoms, preferably 2 carbon atoms
Group R_Three: An alkyl group having 1 to 4 carbon atoms n: OR_TwoAnd the number of added moles of 5 to 30
(Preferably n = 7 to 20)

The ester type nonionic surfactant of component (d) is structurally an alkyl ether of an alkylene oxide adduct of a fatty acid, and is prepared by adding an alkylene oxide to an alcohol by a conventional method, followed by esterification with the fatty acid. Can be obtained by the two-stage method, but trivalent aluminum (Al) ion, gallium (Ga) ion, indium (In) ion, thallium (Tl) ion, cobalt (Co) ion, scandium (Sc) ion, and lanthanum. The fatty acid alkyl ester R ₁ COOR ₃ is reacted with an alkylene oxide in the presence of a catalyst made of magnesium oxide to which one or more metal ions selected from (La) ions and divalent manganese (Mn) ions are added. Those manufactured by the one-step method are preferred (Japanese Patent Application No.
-63904).

The high bulk density granular detergent composition of the present invention comprises:
The component (d) nonionic surfactant of the component (c)
(C) / (d) = 7 to 0.25, preferably 5 to 0.3 by weight ratio with the component, and the total amount of the component (c) and the component (d) is 10 to 50% by weight, preferably Granulation is performed by adding so as to be 15 to 35% by weight. Here, if the above ratio is more than 7, the solubility in cold water is impaired, and if it is less than 0.25, adhesion in a granulator may occur.

On the other hand, if the total amount of the components (c) and (d) is 10% by weight, sufficient detergency cannot be obtained.
If it exceeds 0% by weight, production becomes difficult. The high bulk density granular detergent composition of the present invention may contain other optional components, if necessary, in addition to the components (a) to (d). Optional components include other nonionic surfactants, cationic surfactants; non-aluminosilicate calcium-free trapping chelate builders, such as maleic acid and acrylic acid copolymer granules, β-alanine diacetate, itaconic acid And calcium builder such as vinylpyrrolidone polymer copolymer; protease, lipase,
Enzymes such as cellulase, amylase and keratinase; bleaching agents such as sodium percarbonate and sodium perborate; reducing agents such as sulfites; anti-recontamination agents such as carboxymethylcellulose and polyethylene glycol; soaps; Can be used if necessary. Preferably, components such as a builder, an enzyme, and a bleaching agent are preferably granulated in advance and granulated with detergent particles.

The high bulk density granular detergent composition of the present invention comprises:
A predetermined amount of the component (c) is added to a detergent base containing the components (a), (b) and (c), and the mixture is stirred and mixed / simultaneously in a mixing tank of a high-speed granulator capable of simultaneously performing stirring and crushing. It is obtained by carrying out crushing granulation, and as a result, solubility in cold water is improved. As such a high-speed granulator, for example, an FS-type granulator described in JP-A-2-49100 is used.
G series high-speed mixer-mixer (Fukae Kogyo Co., Ltd.) and the like.

At the time of this granulation, the above-mentioned components (a), (b), (c) and (d) may be simultaneously added, stirred and crushed in a mixing tank of a high-speed granulator. Also,
If all or a part of the components (a), (b) and (c) are supplied in advance as a spray-dried product, and stirring and crushing are performed while adding the nonionic surfactant of the component (d),
It is preferable. By this granulation operation, a bulk density of 0.5
A high bulk density granular detergent composition of about 1.2 g / cc is obtained.

[0022]

According to the present invention, a detergent base containing (a) an alkali builder, (b) an aluminosilicate and (c) an anionic surfactant is added to an ester type nonionic surfactant (c). Is added in a predetermined amount, and in a mixing tank of a high-speed granulator, stirring and mixing / simultaneous crushing granulation are performed.
The solubility of the high bulk density granular detergent composition in cold water can be greatly improved. Hereinafter, the present invention will be described more specifically with reference to examples. Prior to this, the evaluation method used in the examples will be described.

(1) Method for evaluating solubility of detergent composition A black nylon slip, a black acrylic sweater, and a black cotton T-shirt were used as wash cloths, and a cotton skin shirt was used as a charge cloth. Jet-type household automatic washing machine (Matsushita Electric Industrial Co., Ltd., "Aizumago" F6
63 type), and 25 g of the detergent composition was put on the cloth to be washed, and washed with a weak water flow for 6 minutes under the conditions of a water temperature of 5 ° C., a water amount of 38 liters, and a bath ratio of 20: 1.

After that, dehydration was carried out for 1 minute, and the residue of the detergent composition remaining on the cloth to be washed was determined according to the following criteria.

[0025]

【Example】

Example 1 A detergent slurry having a solid content of 60% was prepared using the components shown in Table 1 below except for the nonionic surfactant. The detergent slurry was dried at a hot air temperature of 220 to 380 ° C. using a counter-current spray drying tower so that the water content was 5% to obtain a spray-dried product. This spray-dried product had an average particle size of 350 μm, a bulk density of 0.35 g / cc, an angle of repose of 45 °, and good fluidity.

Next, the dried product, the nonionic surfactant and, if necessary, added water are added to a high-speed granulator (FS-GS).
The mixture was stirred and crushed for a required time in a mixing tank of Model 55 (Fukae Kogyo Co., Ltd.) to obtain a granulated product. The resulting granulated product was a high bulk density granular detergent composition having the composition shown in Table 1 below, an average particle size of 500 μm, and a bulk density of 0.85 g / cc (sample N
o. 1 to 15). Details of the components used in Table 1 are shown below. EOp indicates the average number of moles of ethylene oxide added.

Na ₂ CO ₃ (reagent product) Carbonate-K; K ₂ CO ₃ (reagent product) Zeolite; A-type synthetic zeolite (average particle size 0.9 μm)
m) α-SF-Na; C ₁₂ -C ₁₈ α-sulfofatty acid methyl ester sodium AOS-Na; C ₁₄ -C ₁₈ sodium α-olefin sulfonate LAS-Na; sodium alkyl benzene sulfonate AS-Na; C ₁₄ ~C ₁₅ sodium alkyl sulfate nonionic _{1; C 11 H 23 CO (} OCH 2 CH 2) 10 OCH
₃ Nonionic 2; C ₁₁ H ₂₃ CO (OCH ₂ CH ₂ ) ₁₅ OCH
₃ nonionic 3; C ₁₅ H ₃₁ CO (OCH ₂ CH ₂ ) ₁₅ OCH
₃ nonionic 4; C ₁₇ H ₃₅ CO (OCH ₂ CH ₂ ) ₁₅ OCH
₃ nonionic 5; C ₁₇ H ₃₃ CO (OCH ₂ CH ₂ ) ₁₅ OCH
₃ nonionic 6; C ₁₇ H ₃₃ CO (OCH ₂ CH ₂ ) ₂₀ OCH
₃ Nonionic 7; C ₁₂ -C ₁₃ primary alcohol EOp = 8 mol adduct nonionic 8; C ₁₂ -C ₁₃ primary alcohol EOp = 25
Molar adduct Fluorescent whitening agent: Tinopearl CBS (manufactured by Ciba-Geigy)

[0028]

[Table 1] Sample No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Composition (wt%): (a) component Na 5 55 5 5 5 5 5 5 5 5 5 5 5 5 5 5 carbonate K 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 (b) component zeolite 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 (c) component α-SF-Na 20 20 20 20 20 20 20 20 20 15 15 15 − − − 15 AOS-Na − − − − − − − − 5 5 − 10 10 10 − LAS-Na − − − − − − − − − − − − 10 10 10 − AS-Na − − − − − − − − − − − − − − − − 5 (d) component Nonion 1 5 − − − − − − − − − − − − − − Nonion 2 − 5 − − − − − − 5 − 10 10 5 − 5 Nonion 3 − − 5 − − − − − − − − − − − − Nonion 4 − − − 5 − − − − − − − − − − − − Nonion 5 − − − − − 5 − − − − − − − − − − − Nonion 6 − − − − − − 5 − − − − − − − − − Nonon 7 − − − − − − 5 − − 5 − − − − 5 − Nonion 8 − − − − - - 5 - - - - - - - Fluorescent whitening agent 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Sodium sulfate balance (c) / (d) [wt ratio] 4 4 4 4 4 4 4 4 4 4 1.5 2 4 4 4 (c) + (d) [wt%] 25 25 25 25 25 25 25 25 25 25 25 30 25 25 25 Evaluation: Adhesion AAAAAABCACAAA ~ BCA *) Sample No. 7, 8, 10, and 14 are comparative examples, and others are examples.

Continuation of the front page (56) References JP-A-2-49100 (JP, A) JP-A-4-226599 (JP, A) JP-A-50-92908 (JP, A) JP-A-6-192698 (JP) , A) JP-A-6-100887 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C11D 17/06 C11D 1/74 C11D 11/00 C11D 1/83 C11D 1/831

Claims (1)

(57) [Claims] (1) an alkali builder, (b) aluminum
Wash containing silicate and (c) anionic surfactant
(D) fatty acid ester type represented by the following chemical formula 1
A nonionic surfactant is prepared by adding a component (c) to a component (d).
Is (c) / (d) = 7 to 0.25 by weight ratio, component (c)
And the total amount of component (d) is 10 to 50% by weight.
High-speed granulator that can be mixed and stirred and crushed simultaneously
Mixing / simultaneous crushing and granulation in a mixing tank of
A high bulk density granular detergent composition characterized by being obtained. Embedded image (R₁CO: a saturated or unsaturated fatty acid having 6 to 22 carbon atoms
Residue R_Two: An alkylene group R having 2 to 4 carbon atoms_Three: An alkyl group having 1 to 4 carbon atoms n: OR_TwoRepresents the average number of added moles, and is a number of 5 to 30)