JPS6189300A - Production of granular detergent composition containing nonionic surfactant - 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 The present invention relates to a method for producing a granular detergent composition containing a nonionic surfactant.

Conventional Problems - Granular detergents containing nonionic surfactants are typically produced by adding the nonionic surfactant to a detergent slurry and spray drying the slurry.

However, the granular detergent obtained by this method has poor fluidity, especially immediately after drying, and tends to accumulate at the bottom of the spray drying tower.

Detergent fine powder also adhered to the cyclone, making stable production difficult with actual equipment. There was also the problem that a caking phenomenon occurred during storage. Furthermore, nonionic surfactants are generally sensitive to heat, and part of them thermally decomposes during spray drying, resulting in the problem that they cannot perform their original functions in detergent compositions.

OBJECTS OF THE INVENTION An object of the present invention is to provide a granular detergent composition containing a nonionic surfactant that has good fluidity and prevents caking.

^Mametachi Futan The method for producing a granular detergent composition containing a nonionic surfactant of the present invention includes mixing a water-soluble powder and silica powder, and then spraying the nonionic surfactant onto this mixture. Then,
It is characterized in that zeolite or calcium carbonate powder is added to prepare nonionic surfactant-containing granules having an average particle size of 300 to 700 μm, and the granules are blended with a granular detergent.

The present invention will be explained in more detail below.

In the manufacturing method of the present invention, first, a water-soluble powder and silica powder serving as a base are mixed. As water-soluble powder,
Soda carbonate, soda sulfate.

Powdered materials of water-soluble builders for detergent addition, such as sodium citrate, are preferred, and these may be used alone or in combination. The average particle size of these granules is suitably 100 to 500 μm. Further, the silica powder preferably has a particle size of 0.1 μm or less.

Next, a nonionic surfactant is sprayed onto the mixture of water-soluble powder and silica powder, and the mixture is granulated by an appropriate means such as transfer granulation using a drum-type granulator. It is important to mix the water-soluble powder and silica powder before spraying the ionic surfactant. If a nonionic surfactant is sprayed without mixing water-soluble powder and silica powder, or if silica powder is added after spraying, coarse particles will be generated in the granules. Coarse particles grow and accumulate inside the granulator, making stable operation difficult.

Furthermore, when washing is carried out by adding nonionic surfactant-containing granules containing coarse particles to a granular detergent, there is a problem in that the particles remain attached to the cloth to be washed even after washing is completed. The amount of nonionic surfactant sprayed is 5
~60 wt% is appropriate.

As the nonionic surfactant, common surfactants used in detergents can be used, for example.

Alkyl group (or alkenyl group) has 8 to 18 carbon atoms
A polyoxyalkyl (or alkenyl) ether with an average added mole number of ethylene oxide (EOi5) of 3 to 20, and an alkyl group (or alkenyl group) having 5 to 12 carbon atoms.
So, polyoxyethylene alkyl with EOβ=3 to 8 (
or alkenyl) phenyl ether, the number of carbon atoms in the alkyl group (or alkenyl group) is 8 to 18
EOβ = 3 to 15, polyoxyethylene polyoxypropylene alkyl (or alkenyl) ether, glycerin, sucrose, etc., polyhydric alcohol fatty acid partial ester, fatty acid Examples include fatty acid jetanolamide whose residue has 10 to 18 carbon atoms, polyoxyethylene polyoxypropylene glycol, etc. Among them, EO and PO are added to a secondary alcohol represented by the following general formula (1). Polyoxyethylene polyoxypropylene alkyl ether is preferred.

R□ CH○1C2H40+□1003HGO). HR, (,1
) [In the formula, R* Rtt R2, m, n represent the following.

R: Alkyl group or alkenyl group having 1 to 18 carbon atoms R2: Alkyl group or alkenyl group having 1 to 18 carbon atoms (Number of moles) n: 3 to 15 (Average number of moles added of propylene oxide) However, m/n = 0.5 to 3] In the above general formula (I), ethylene oxide (E O) and propylene oxide (PO ) may be random polymerization or block polymerization, and in that case, the bonding order does not matter.

Preferably, EO and PO are block polymerized so that PO forms a terminal. Moreover, preferably m=5~
12, n=3 to 10.

Next, after spraying a nonionic surfactant, zeolite or calcium carbonate powder is added to obtain a nonionic surfactant-containing granule. Zeolite and calcium carbonate have an average particle size of 0. 1 to 10 μm is preferable, and the appropriate amount of addition is 5 to 60 wt % based on the water-soluble powder. Adding zeolite or calcium carbonate after spraying improves the fluidity of the granulated product and prevents caking of the detergent to which the granulated product is added. The resulting nonionic surfactant-containing granules are preferably granulated to have an average particle diameter of 300 to 700 μm, more preferably 350 to 500 μm. If the particle size is smaller than 300 μm, separation will occur in the detergent carton, while if it is larger than 700 μm, it will stick to the cloth.

The nonionic surfactant-containing granules obtained as described above are mixed with one granular detergent to form a granular detergent composition containing the nonionic surfactant of the present invention.

As the granular detergent, conventional granular detergents containing a surfactant other than a nonionic surfactant as a main active ingredient can be used. Such granular detergents can be produced, for example, by a spray drying method, and the average particle diameter of the granular detergent is suitably 300 to 700 μm, preferably 350 μm.
~600 μm. In the granular detergent composition containing a nonionic surfactant, the nonionic surfactant is 0.1 to 5 wt%.
, 0.1-5 wt% of silica powder, 5-2 wt% of zeolite
(ht%), and it is appropriate to blend the nonionic surfactant-containing granules into the granular detergent so that the calcium carbonate content is 0 to 4 wt%.

It is appropriate for the granular detergent to contain an anionic surfactant, and specific examples of these anionic surfactants include: linear alkylbenzene sulfonates having an alkyl group with an average carbon number of 10 to 16; Olefin sulfonate having 10 to 20 carbon atoms, alkenyl ether sulfate or alkenyl having an average of 10 to 20 carbon atoms, a linear or branched alkyl group or an alkenyl group, and an average of 0.5 to 8 moles of ethylene oxide added thereto. Ether sulfate.

Alkyl sulfate having an alkyl group having an average carbon number of 10 to 20.

Saturated or unsaturated fatty acid salt having an average carbon number of 10 to 22.

α-Sulfo fatty acid salt or α-sulfo fatty acid ester salt R-CHCO2Y SO,Z represented by the following general formula (Y in the formula is an alkyl group having 1 to 3 carbon atoms or a counter ion, Z is a counter ion, R is an alkyl group or alkenyl group having 10 to 22 carbon atoms.

The anionic activator is present in the detergent composition of the present invention in an amount of 5 to 50 wt.
%, preferably 10 to 40 wt%.

In addition, granular detergents contain inorganic alkali builders such as silicates and carbonates, inorganic neutral builders such as sulfates, aminopolyacetates such as nitrilotriacetate and ethylenediaminetetraacetate, citrates, and malates. Organic builders such as polyelectrolytes such as oxycarboxylic acid salts, polyacrylic acid, and alkali hydrolyzed salts of vinyl acetate-maleic anhydride copolymers can be blended. These water-soluble builders for detergents can also be blended into nonionic surfactant-containing granules, especially as a base. It is appropriate to blend the inorganic alkali builder in the detergent composition in an amount of 5 to 30 νt%, preferably 10 to 2% (
ht%. Further, the organic builder can be blended in the detergent composition in an amount of 0 to 40 wt%.

Furthermore, it is appropriate to incorporate zeolite, the amount of which is as described above. Further, optional components used in ordinary detergents such as polyethylene glycol, fatty acid soap, fluorescent agents, enzymes, and fragrances can be added.

According to the present invention, when producing a granular detergent composition containing a nonionic surfactant, granules containing the nonionic surfactant are separately prepared, and in this preparation, water-soluble By mixing the base material and silica powder, spraying with a nonionic surfactant, and then adding zeolite or calcium carbonate and granulating it, a granular detergent composition with good flowability and caking prevention can be obtained. Obtainable.

Nonion-containing granules were prepared according to the granulation conditions A to D below in Examples, and the properties are shown in Table 1 as the properties of the granules.

The method for measuring fluidity is summarized in the detergent composition section below.

AO exchange 1 note 1 m: 100 parts by weight of powdered soda carbonate with an average particle size of 300 to 350 μm and an average particle size of 0.01 to 0.0 μm.
5 parts by weight of 0.03 μm silica powder were mixed uniformly.

Next, 30 parts by weight of polyoxyethylene polyoxypropylene alkyl ether obtained by block polymerizing an average of 9 mol of ethylene oxide and an average of 5 mol of pro-pylene oxide (PO) to a C□2 secondary alcohol so that PO is the terminal terminal. was granulated by rolling in a drum-type granulator while spraying it onto the above mixture, and the average particle size was further reduced to 1 to 2 μm.
20 parts by weight of type A zeolite is added to obtain a non-ion-containing granulated product.

Granulation condition A2: average particle size 0.3 to 1 instead of zeolite
The granulation conditions are the same as Ai except that µm of calcium carbonate is used.

Complex "Genko Kyu" b-: Start granulation by spraying polyoxyethylene polyoxypropylene alkyl ether onto soda carbonate, then add powdered silica, and then add zeolite. The properties and usage amounts of each component are granulation conditions A.
It is the same as engineering.

'mA4't-B: Granulation is carried out in the same manner as granulation conditions A□ except that zeolite is not added.

Further, each of the granules thus obtained was added to a granular detergent separately obtained by a spray drying method so as to have the following composition to obtain a detergent composition.

Ingredient j1
'1C1,,, α-Olefin sodium sulfonate 10wt% Sodium dodecylbenzenesulfonate 10vt% Polyoxyethylene polyoxypropylene alkyl ether 3wt% Soap 3w
t% zeolite
15wt% carbonated soda
10wt% Sodium Silicate
10wt% silica powder
1wt% small amount additive
3wt% moisture
5wt% mirabilite
After balancing, the properties of these detergent compositions were measured as follows, and the results are shown in Table 1.

Fill an assimilable practical carton with 1.3 kg of detergent and store at 35°C-8.
After leaving it for one week at 5% RH, the weight ratio of the residue on the 4# sieve was determined.

Similarly to the fluidity and solidification properties, the angle of repose of the detergent composition left in the carton was sufficiently stirred and measured.

The laundry consisting of 2 pieces of black nylon slip 80g x 2 pieces of black acrylic sweater 180g x 2 pieces of blue stockinette shirt 5 pieces of 100g x blue stockinette shirt was placed in a jet-type household electric washing machine, and detergent was added using each of the above compositions and tap water at 5°C. After washing for 5 minutes at a concentration of 0.26% and a bath ratio of 30 times, the items were rinsed twice for 3 minutes each with tap water at 5°C to dehydrate them. Visual judgment was made using the standard.

There are no adhered particles or they are not noticeable. 0 Adhered particles are slightly noticeable. △ Adhered particles are very noticeable.
× Segregation in the carton A practical carton was filled with 1.3 kg of detergent composition, and 10H
z, IG CM/see (, M, After vibrating for 90 minutes, detergent was shaken out from the carton in 13 portions of 100 g each, the nonionic surfactant contained in each detergent was measured, and the average Furthermore, the standard deviation σ was determined and determined as follows.

O: σ/X is 20% or less Δ:σ/¥ is 21-30% ×: σ/X is 31% or more (Margin below) Table 1

Claims (1)

[Claims] 1. After mixing the water-soluble powder and silica powder, a nonionic surfactant is sprayed onto this mixture, and then zeolite or calcium carbonate powder is added to prepare a nonionic surfactant-containing granule. A method for producing a granular detergent composition containing a nonionic surfactant, which comprises blending the granulated product with a granular detergent.