JPH0676599B2 - High bulk density granular detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a granular detergent composition having a high bulk density without causing uneven fluorescence.

2. Description of the Related Art Conventional detergents for clothes have a bulking agent of 0.3 g / cc added by adding an extender (usually Glauber's salt is used) that hardly contributes to the cleaning performance to the composition and spray drying it. It was manufactured as bead-shaped hollow particles.

However, since such detergents have a low specific gravity and a low concentration of activator, they are costly to transport and require considerable space for storage and display. It was 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 (Japanese Patent Laid-Open No. 60-96698) and is also on the market.

On the other hand, the fatty acid lower alkyl ester sulfonate is
It is a surfactant having excellent detergency, especially hard water resistance, and a high bulk density detergent composition containing the same has been reported (JP-A-62-597).

However, when a fluorescent agent is added to a high bulk density detergent containing a sulfonate of a fatty acid lower alkyl ester, there is a problem that uneven fluorescence is likely to occur in the washed fiber.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides a high-bulk-density granular detergent composition in which uneven fluorescence is prevented from occurring on the cloth to be washed.

Composition of the Invention The high-bulk density granular detergent composition of the present invention has a bulk density of 0.5 to 1.2 g / cc and contains the following components (a), (b) and (c). A biphenyl type fluorescent agent and a stilbene type fluorescent agent are used together as the component fluorescent agent, and the weight ratio of the component (b) and the component (c) is (b) / (c) = 99.9 / 0.1.
It is characterized by being mixed in a ratio of ~ 60/40.

(A) Sulfonate of mixed fatty acid lower alkyl ester having 4 to 16 carbon atoms in fatty acid residue: 5 to 30% by weight.

(B) Polyoxyethylene glycol having a molecular weight of 200 to 10,000: 0.1 to 10% by weight.

(C) Fluorescent agent: 0.01 to 1.0% by weight.

The sulfonate of the fatty acid lower alkyl ester as the component (a) is typically represented by the following general formula (I), which is α
-Also called sulfo fatty acid ester salt.

(R ¹ : alkyl group R ² : C ₁ to ₃ lower alkyl group M: counterion) As the counterion, a water-soluble salt is used, but an alkali metal salt, particularly a sodium salt is preferable.

Sulfonic acid salts of saturated fatty acid lower alkyl esters are obtained by ester exchange or esterification of fatty acids to obtain fatty acid lower alkyl esters having a specified number of carbon atoms, and then reacted with a sulfonating agent such as sulfuric anhydride using an ordinary sulfonation device. It is obtained by aging, bleaching, and then neutralizing, if necessary. It can also be obtained by converting a sulfonated fatty acid into a lower alkyl ester.

Further, a sulfonate of an unsaturated fatty acid lower alkyl ester is also used, and is produced in the same manner as described above using an unsaturated fatty acid having a predetermined carbon number as a starting material.

As the raw material fatty acid, a fatty acid having a predetermined carbon number of animal and plant origin derived from coconut oil, palm oil, or the like, or a synthetic fatty acid is used.

As the fatty acid lower alkyl ester sulfonate, one having a mixed fatty acid residue having 14 to 16 carbon atoms is used.

In the fatty acid lower alkyl ester sulfonate, those having a specific carbon number such as (a) and (b) below are
(B) / (B) = 1/9 to 6/4, preferably (B) / (B)
The solubility of the detergent composition can be improved by blending them together in a weight ratio of 2/8 to 5/5.

(A): Aliphatic residue C ₁₄

(B): one aliphatic residue C _16.

As the component (b), polyoxyethylene glycol having a molecular weight of 200 to 10,000, preferably 400 to 7,000 is used. If the molecular weight deviates from the above range, uneven fluorescence cannot be prevented.

The component (b) is incorporated in the detergent composition in an amount of 0.1 to 10% by weight, preferably 0.5 to 6% by weight.

As the fluorescent agent as the component (c), a biphenyl type fluorescent agent and a stilbene type fluorescent agent are used in combination, and specific examples thereof include the following, and a sodium salt is a typical salt. is there.

: Biphenyl type fluorescent agent 4,4'-bis (2-sulfostyryl) biphenyl salt.

: Stilbene type fluorescent agent 4,4'-bis [(4-amino-6-anilino-1,3,5-triazin-2-yl) amino] stilbene-2,2'-disulfonate, 4,4 ' -Bis [(4-anilino-6-N-hydroxyethylamino-1,3,5-triazin-2-yl) amino]
Stilbene-2,2'-disulfonate, 4,4'-bis [(4-anilino-6-morpholino-1,3,5
-Triazin-2-yl) amino] stilbene-2,2 '
Disulfonate, 4,4'-bis [(4-toluidino-6-morpholino-1,
3,5-triazin-2-yl) amino] stilbene-2,
2'disulfonate.

The total amount of the fluorescent agent as the component (c) is 0.01 to 100% in the detergent composition.
It is compounded at 1.0% by weight.

The weight ratio of the components (b) and (c) is (b) /
(C) = 99.9 / 0.1 to 60/40, preferably 99.5 / 0.5 to 50/50
It is mixed in the ratio of. If this ratio exceeds 99.9 / 0.1, the finished whiteness will decrease, while if it is less than 60/40, the occurrence of uneven fluorescence cannot be prevented.

In the high bulk density granular detergent composition of the present invention, the above (a),
In addition to the essential components (b) and (c), other components such as other surfactants and builders can be contained.

Examples of the anionic surfactant include the followings.

1) a linear alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16; 2) an α-olefin sulfonate having an average carbon number of 10 to 20; 3) an alkyl sulfate having an average carbon number of 10 to 20; ) Alkyl ether sulfates or alkenyl ether sulfates having a linear or branched alkyl or alkenyl group having an average carbon number of 10 to 20 and having an average of 0.5 to 8 mol of ethylene oxide added, 5) Average carbon number of 10 ~ 22 saturated or unsaturated fatty acid salts.

6) An α-sulfo fatty acid salt represented by the following general formula.

(In the formula, Z is a counter ion and R is an alkyl group having 10 to 22 carbon atoms.) As a counter ion in these anionic surfactants, alkali metal salts such as sodium and potassium are usually suitable.

The following are suitable as the nonionic surfactant.

(1) An EO-added nonionic surfactant obtained by adding 4 to 25 mol of ethylene oxide (EO) on average to a primary or secondary alcohol having 8 to 18 carbon atoms.

(2) EO-PO-added nonionic surfactant obtained by adding an average of 4 to 25 mol of ethylene oxide (EO) and an average of 3 to 15 mol of propylene oxide (PO) to a primary or secondary alcohol having 8 to 18 carbon atoms. Agent.

Furthermore, zeolite (aluminosilicate), inorganic builders such as sodium tripolyphosphate and sodium pyrophosphate; sodium citrate, sodium ethylenediaminetetraacetate, nitrilotriacetic acid salt, sodium polyacrylate, sodium acrylate-sodium maleate anhydrous Calcium ion trapping builders such as polymers and polyacetal carboxylates; alkali builders such as carbonates and silicates; anti-redeposition agents such as carboxymethyl cellulose; rinse improvers such as soaps; paratoluene sulfonates and toluene sulfonates. Viscosity modifiers such as xylensulphonate and urea; proteases, lipases,
Enzymes such as cellulase and amylase (especially alkaline lipase having activity in an alkaline atmosphere); softening agents such as quaternary ammonium salts and bentonite; bleaching agents, perfumes, dyes and the like can be used.

The detergent composition of the present invention has a bulk density of 0.
It is obtained by using a high bulk density composition of 5 to 1.2 g / cc. As this granulation method, as described in the above-mentioned JP-A-62-597, detergent raw materials such as fatty acid lower alkyl ester sulfonates are kneaded and mixed with a kneader, and a mill such as a cutter mill type is mixed. It is obtained by crushing and granulating with a crusher and further mixing with water-insoluble fine powder. Alternatively, a part or all of the detergent components may be previously spray-dried, and the spray-dried product may be kneaded and mixed with the rest of the detergent components to produce a high bulk density granular detergent composition. Components such as enzymes may be powder blended with a granular detergent.

EFFECTS OF THE INVENTION According to the present invention, in a high-bulk density granular detergent composition containing a sulfonate of a fatty acid lower alkyl ester, a sulfonate of a fatty acid lower alkyl ester having a specific carbon number is used, and a specific polyethylene glycol is used. By combining and using two kinds of fluorescent agents in a specific amount ratio, it is possible to prevent the fluorescent unevenness from occurring in the washed fiber and perform the fluorescent whitening treatment.

Example In each example, the uneven fluorescence was evaluated by the following method.

Evaluation of Fluorescence Uneven Dyeability A cotton knitted skin shirt was used as the cloth to be washed, and after being worn for 2 days, it was used as a test cloth. The test cloth is put into tap water (about 20 ° C., about 4 ° DH) of 5, and the detergent composition is sprinkled on the test cloth so that the concentration becomes 0.5% by weight, and the mixture is left for 16 hours. Then, transfer it to the washing machine (spiral type, inversion type),
Tap water is added so that the concentration of the composition will be 0.0833%, the mixture is washed at a bath ratio of 1:30 for 10 minutes and then dehydrated for 1 minute. After rinsing for 3 minutes twice, dehydration is performed and the cloth to be washed is air-dried. Then, the cloth to be washed was visually judged and evaluated according to the following criteria.

Evaluation point 1 point: No unevenness is observed on the cloth to be washed.

2 points: unevenness is observed on the cloth to be washed.

3 points: Many irregularities are observed on the cloth to be washed.

Example 1 A high bulk density granular detergent composition (bulk density 0.78 g / cc) having the composition shown in Table 1 below was prepared.

The components shown in Table 1 below were kneaded with a kneader, and the resulting intimate mixture pellet (2 cm square) and type A zeolite were quantitatively fed to a disintegrator (Okada Seiko, Speed Mill ND-30 type). At this time, cool air of 15 ° C with this crushed material 15 / crushed material
Introduced at a rate of kg. Crusher rotates at 3000rpm solutions cracking blades diameter 15cm cross four stages, the screen 2 mm ^phi, the hole area ratio
20% punching metal was used.

Next, the crushed product and A-type zeolite with an average primary particle size of 3 μm were quantitatively fed to a rolling drum (D = 30 cm ^φ , L = 60 cm) at a ratio of 97: 3, and coated product at 30 rpm and a residence time of 5 minutes. Was discharged to obtain a high bulk density detergent composition.

Claims (1)

[Claims] 1. A sulfonic acid salt of a mixed fatty acid lower alkyl ester having 14 to 16 carbon atoms in a fatty acid residue: 5 to 30% by weight, and (b) a polyoxyethylene glycol having a molecular weight of 200 to 10000: 0.1 to 10% by weight, and (c) a fluorescent agent: 0.01 to 1.0% by weight, a biphenyl type fluorescent agent and a stilbene type fluorescent agent are used together as the (c) fluorescent agent, and (b) component and (c) ) Component and (b) / (c) = 99.9 / 0.1-60 by weight ratio
Bulk density of 0.5 characterized by being mixed in a ratio of / 40
~ 1.2 g / cc high bulk density granular detergent composition.