JPH02103294A - High-bulk density granular detergent composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition free from color change of detergent granules during storage by blending respectively specified aliphatic lower alkyl ester sulfonate, sulfonated fatty acid and aluminosilicate in a specified ratio. CONSTITUTION:With (A) 5-30wt.% (preferably 8-25wt.%) aliphatic lower alkyl ester sulfonate having 8-22C (preferably 10C-18C) fatty acid residue, (B) 0.01-3wt.% (preferably 0.05-2.9wt.%) sulfonated aliphatic acid having 8-22C (preferably 10-18C) fatty acid residue and (C) 5-40wt.% (preferably 10-30wt.%) crystalline or amorphous aluminosilicate, preferably represented by the formula (M is alkaline metal; M' is alkaline earth metal replaceable for Ca; x is 0.7-1.5; y is 1-3; w is arbitrary number) are blended to obtain the objective composition with 0.5-1.2g/cc bulk density.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular detergent composition with a high bulk density that prevents color deterioration of detergent particles due to storage.

In conventional laundry detergents, a bulking agent (usually Glauber's salt is used) that hardly contributes to cleaning performance is added to the composition, and this is spray-dried to a bulk density of 0.3 g / c.
It was produced as bead-shaped hollow particles of about

However, such detergents have a low specific gravity and a low active agent concentration, which increases transportation costs and requires a considerable amount of space for storage and display.Furthermore, even in ordinary households, it is difficult to find a place to store them and it is difficult to measure them. Ta. So recently,
A method for manufacturing a high bulk density granular detergent that can be cleaned with a small amount of detergent has been proposed (Japanese Patent Application Laid-Open No. 60-96698), and has also been made into a top cloth.

On the other hand, sulfonates of fatty acid lower alkyl esters are
It is a surfactant with excellent detergency, especially hard water resistance, and a high bulk density detergent composition containing it has been reported (Japanese Patent Application Laid-Open No. 62-597).

However, high bulk density granular detergents have a problem in that the color tone of the detergent particles deteriorates upon storage.

The present invention provides a high bulk density granular detergent composition in which the color tone of detergent particles is not impaired before and after storage.

The high bulk density granular detergent composition of the present invention has the following (a):
It is characterized by containing components (b) and (c).

(a) Sulfonate of a fatty acid lower alkyl ester having 8 to 22 carbon atoms as a fatty acid residue; 5 to 30% by weight.

(b) Salt of fatty acid sulfonated fatty acid residue having 8 to 22 carbon atoms; 0.01 to 3% by weight.

(c) Aluminosilicate; 5 to 40% by weight.

The present invention will be explained in more detail below.

A sulfonic acid salt of a fatty acid lower alkyl ester is typically represented by the following general formula (1), and is also called an α-sulfo fatty acid ester salt.

R"-CHCOOR2 5o, M...(1)
(R1: Alkyl group R2: Lower alkyl group with a carbon concentration of about 3 M: Counter ion) As the counter ion, water-soluble salts are used, but alkali metal salts, particularly sodium salts, are preferred.

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

Sulfonic acid salts of lower alkyl esters of unsaturated fatty acids are also used, and are produced in the same manner as above using unsaturated fatty acids having a predetermined number of carbon atoms as starting materials.

As raw fatty acids, fatty acids with a predetermined number of carbon atoms derived from animals and plants derived from beef tallow, coconut oil, palm oil, etc., and synthetic fatty acids are used.

The fatty acid residue of the fatty acid lower alkyl ester sulfonate has 8 to 22 carbon atoms, preferably 10-18 carbon atoms.

Among the fatty acid lower alkyl ester sulfonates, those with specific carbon numbers as shown in (a) and (b) below are used as (a)/
(b) = 1/9 to 6/4, preferably (a) / (b) =
By combining them in a weight ratio of 2/8 to 515, the solubility of the detergent composition can be improved.

(A): Those of aliphatic residues CL2 to □4.

(b): Those with aliphatic residues C16-18.

The fatty acid lower alkyl ester sulfonate as component (a) is blended in the detergent composition in an amount of 5 to 30% by weight, preferably 8 to 25% by weight. If the amount is less than 5% by weight, sufficient detergency cannot be obtained, while if it exceeds 30% by weight, manufacturing becomes difficult.

(b) Component salt of fatty acid sulfonate has 8 to 2 carbon atoms.
It is obtained as a di-salt (fatty acid salt, sulfonate) by sulfonating and neutralizing 2, preferably 10 to 18 fatty acids. The amount of component (b) incorporated into the detergent composition is 0.
．． 01-3% by weight, preferably 0.05-2.9% by weight
If it deviates from this range, color deterioration of detergent particles cannot be sufficiently prevented.

As the aluminosilicate of component (c), the following general formula (I
Crystalline or amorphous aluminosilicates represented by I) or mixtures thereof are preferred.

x (M, ○ or M'O)・Al2201・y (SiO
2)・Bushi (R20)-(II) (In the formula, M is an alkali gold scrap atom, 1M' is an alkaline earth metal atom exchangeable with calcium, and X.

y and W represent the number of moles of each component, and generally, X is 0.7 to 1.5, y is 1 to 3, and W 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 is blended in the detergent composition in an amount of 5 to 40% by weight, preferably 10 to 30% by weight.

The high bulk density detergent composition of the present invention has the above-mentioned (a).

In addition to the essential components (b) and (C), optional components such as other surfactants and builders can be contained.

Examples of anionic surfactants include the following.

1) Linear alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16, 2) α-olefin sulfonate having an average carbon number of 10 to 20, 3) Alkyl sulfate having an average carbon number of 10 to 20, 4 ) an alkyl ether sulfate or an alkenyl ether sulfate having a linear or branched alkyl group or alkenyl group with an average carbon number of 10 to 20 and an average of 0.5 to 8 moles of ethylene oxide; 5) average carbon Number 10 to 22 saturated or unsaturated fatty acid salts.

As the counter ion in these anionic surfactants, alkali metal salts such as sodium and potassium are usually suitable.

As the nonionic surfactant, the following are suitable.

(1) E○ addition type nonionic surfactant in which an average of 4 to 25 moles of ethylene oxide (EO) is added to an IR or secondary alcohol having 8 to 18 carbon atoms.

(2) E〇-P○ addition type, in which an average of 4 to 25 moles of ethylene oxide (E○) and an average of 3 to 15 moles of propylene oxide (po) are added to a primary or secondary alcohol having 8 to 18 carbon atoms. Nonionic surfactant.

In addition, inorganic builders such as sodium tripolyphosphate and sodium pyrophosphate; sodium citrate, sodium ethylenediaminetetraacetate, nitrilotriacetate, sodium polyacrylate, sodium acrylate-salium maleic anhydride copolymer, polyacetal Calcium ion scavenging builders such as carboxylates; alkali builders such as carbonates and silicates; anti-recontamination agents such as carboxymethyl cellulose and polyethylene glycol;
Rinse improver for soaps, etc.; para-toluene sulfonate,
Viscosity modifiers such as toluene sulfonate, xylene sulfonate, and urea; Enzymes such as protease, lipase, cellulase, and amylase (alkaline lipase, etc., which are particularly active in an alkaline atmosphere); Softeners such as quaternary ammonium salts and bentonite Imparting agents; bleaching agents, fluorescent agents, fragrances, pigments, etc. can be used.

The detergent composition of the present invention has a bulk density of 0 by granulating the above components.
．． It is obtained by preparing a high bulk density composition of 5 to 1.2 g/cc. As this granulation method, the above-mentioned Japanese Patent Application Laid-Open No.
As described in Publication No. 2-597, detergent raw materials such as fatty acid lower alkyl ester sulfonates are kneaded and mixed in a kneader, crushed and granulated in a crusher such as a cutter mill type, and then water-insoluble Obtained by mixing fine powder.

Alternatively, a high bulk density granular detergent composition can also be produced by spray-drying some or all of the detergent components in advance and kneading and mixing this spray-dried product with the remaining detergent components. Components such as enzymes may be powder blended into the granulated detergent.

According to the present invention, (a) a sulfonate of a fatty acid lower alkyl ester, (b) a salt of a fatty acid sulfonate, and (
c) By using a specific amount of an aluminosilicate compound, it is possible to prevent the color tone of the detergent particles of the high bulk density detergent composition from being impaired during storage.

Examples In each of the following Examples, each detergent composition was evaluated based on the following criteria.

Fill a carton with the twisted body sample and heat at 35℃-85%RHX 16
The powder was stored for 40 days under recycling conditions of 25° C. and 60% R11×8 hours, and the powder hundred degrees (b value) before and after storage was measured using a colorimeter model Z-1001DP manufactured by Nippon Shinshoku ■.

Example 1 High bulk density granular detergent composition (
A bulk density of 0.78 g/cc) was produced.

Knead each component in Table 1 below (excluding enzymes) with a kneader,
The obtained intimate mixture pellets (2 cm square) and A-type zeolite were crushed using a crusher (manufactured by Okada Seiko, Speed Mill ND-30).
A fixed amount was fed into the mold.

At this time, cool air at 15℃ is applied to the crushed material at a rate of 150/k of crushed material.
g. The crusher rotates crushing blades with a diameter of 15 cm at 300 rpm in 4 stages, and has 2 screens.
A punching metal with a diameter of mm and a hole area of 20% was used.

Next, the obtained crushed product and A-type zeolite with an average-order diameter of 3 μm were transferred to a transfer drum (D = 30 cm, L = 60 cm).
) at a ratio of 97:3, and the coated product was discharged at 30 rpm with a residence time of 5 minutes. The powder hundred degree change of the obtained high bulk density detergent composition was evaluated and shown in Table 1.

(Left below) *1) Sodium α-sulfo fatty acid (C,4-,,) methyl ester *2) Number of carbon atoms in fatty acid = 014-16 *3) Alkyl (c x 3) ether 1-xylate (average of ethylene oxide Number of moles added = 18)

Claims (1)

[Scope of Claims] 1. (a) Sulfonate of fatty acid lower alkyl ester having 8 to 22 carbon atoms in fatty acid residue; 5 to 30% by weight; (b) Fatty acid having 8 to 22 carbon atoms in fatty acid residue A high bulk density granular detergent composition comprising: 0.01 to 3% by weight of a sulfonated salt; and (c) 5 to 40% by weight of an aluminosilicate.