JPH01299898A - Component for detergent composition - Google Patents

Abstract

PURPOSE: To dissolve the component quickly into the washing liquid, color it uniformly and clearly with a small quantity and prevent separation from the detergent powder during the period of storage and handling with a suitable bulk density by coating the granules of an alkali metal silicate with dye or pigment.

CONSTITUTION: The surfaces of alkali metal silicate with the average particle size of 0.2-2mm, preferably, 0.8-1.6mm and with the bulk density of 700g/L or more, preferably 800g/L or more and 5 and/or 6 hydrate of sodium silicate in which the ratio of Na₂O to SiO₂ is preferably 1:1.5 to 1:3.0 are coated with a coloring agent such as Monastral Blue or Unidisperse Blue addead to Monastral Blue or the like, to thereby provide the component for detergent composition for a use of coloring the material to be washed.

COPYRIGHT: (C)1989,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a colored granular material that can be used as a spotting material for detergent powders, and to a method for producing the spotting material.

BACKGROUND OF THE INVENTION Colored particles for use in prior art detergent compositions (detergent spot 0) are well known in the detergent industry, particularly in phosphate-containing detergent compositions. Cleaner-spotted wood is therefore usually
Primarily based on soluble inorganic salts such as phosphates, especially sodium triphosphate, sodium sulfate, or mixtures thereof, these particles are coated with a colorant, i.e., a solution or dispersion of a dye or pigment; or had undergone impregnation treatment. Preferred spots are green or blue. Spotted wood provides attractive consumer appeal to cleaning compositions and can also function as a special effect ingredient in cleaning compositions.

The coloring agent in the granular material should preferably be in small amounts so as not to interfere with the cleaning process, and the speckled material should also be of a bright color, preferably the detergent speck base should be compatible with the detergent composition. It must be useful and serve a practical purpose. For the ``phosphate-free detergent composition'' a ``phosphate-free-based spotting material'' is of course used. Therefore, it is a suitable colored detergent speck material that gives a uniform and vivid color even if it consists of a small amount of face r1 or dye, and the particle color is stable so that it can withstand abrasion, has almost no dust, and is suitable for storage and storage. It has an appropriate bulk so that it does not separate from the cleaning agent powder during handling, and it solidifies (caki) in the cleaning liquid.
There was a problem in that it was necessary to provide a product that dissolves quickly without ng).

There are also many ways to make traditional detergent spotting materials. For example, there is a method of spray drying a colored slurry, but this method has the major disadvantage of requiring thorough cleaning of the equipment when producing regular cleaning powder again. Another method is to spray a colored solution onto spray-dried cleaning powder, but this method has the drawback of requiring a large amount of colored solution.

It has also been suggested to spray onto the particles a solution of a colorant consisting of a hydratable salt, preferably a warm concentrated solution to facilitate subsequent crystallization. This method was found to be impractical due to the high proportion of colorant required for zeolite-containing cleaning compositions.

SUMMARY OF THE INVENTION The present invention provides a colored detergent spotted material that solves the above-mentioned problems.
It is provided in the form of a granular alkali metal silicate coated with a colorant, ie, a pigment or dye.

As the alkali metal silicate, preferably sodium silicate is used, more preferably metasilicate and/or disilicate.

Silicates improve the cleaning effectiveness and provide the cleaning composition with a function as a corrosion inhibitor. It is therefore a functional additive. According to the invention, particular preference is given to hydrated silicates as base material for spotting, with sodium silicate penta- and/or hexahydrate giving optimum results.

Due to the well-known high alkalinity of alkali metal silicates,
It was completely unexpected that these silicates would serve as a base material for spotting materials for cleaning agents with a uniform bright color, deep hue, and particularly good color stability. As a base material for speckled wood it is recommended that it consists essentially of sodium silicate, but at least 50% of the co-dried weight.
Mixture materials may also be used for spotting, where the alkali metal silica R salt and the remainder are zeolites, sodium sulfate, or other inorganic materials such as sodium phosphate, if their presence in the cleaning composition allows. It is possible.

The colored silicate particles according to the invention usually have an average particle size of from 0 mm2 to 2 mm in diameter, preferably from 0 mm8 to 1.6M. Spherical particles offer advantages and their diameter can be used to determine size.

Of course, the actual size of the desired dot material will depend on the actual size of the cleaning powder with which it is mixed.

The colorant, ie, dye or pigment, which forms a coating on the alkali metal silicate particles, usually accounts for 0 mm 1 to 2.0% based on the weight of the particles.

The coloring agent is, for example, Monastral Blue (manufactured by TCI, UK).
Dyes and compounds commonly available on the market such as Monastral Green (IC1, UK) plus Unidisperse Blue (Ciba Gai 1!) are preferred.

Colored detergent spotting materials are typically 0m by weight of the total detergent composition.
It is mixed into the cleaning powder at a level between ml% and 5%, preferably between 0mm2% and 2.0%.

Effect The present invention particularly provides a ratio of 1:1 to 1:3.3, preferably 1:1 to 1:3.3.
:1.5 to l:3. including the use of sodium silicate giving a Ha20:5in2 ratio of o. High ratios are generally unfavorable because they have low dissolution marks. Particles of alkali metal silicate can be made M m by various operating procedures. For example, metasilicate (Na, 0:
Sin, ratio 1:1) can be granulated in a rotating barrel as described in British Patent No. 1 149 859 (Baker Holloway). Silicates, such as sodium disilicate, are produced in dense forms with high bulk density by the operating procedures described in U.S. Pat. be able to.

This dense form of silicon M salt has a bulk density of 700 g/i,
It is particularly useful for spotting materials intended for high bulk density detergent powders, preferably greater than 800 g/j7. Sodium disilicate is densified between rollers 70
0g/j! From 900g/j! The bulk density can be between. Sodium metasilicate is granulated in a rotating barrel from 880g/l to 1000g/j! The bulk density can be between. In the range of low bulk densities, a binder, for example a silicate solution, may be necessary to complete the compact obtained with the two rollers.

The colored detergent spotting materials according to the invention, which are based on alkali metal silicates, can be produced by spraying a solution of the colorant onto granular alkali metal silicates under suitable conditions. . The granular alkali metal silicate is kept in constant motion to prevent solidification (caking).

This can be done, for example, by operating in a fluidized bed or in a mixer and then drying the particles in constant motion. Apparatus suitable for this technique include fluidized beds, nozzles for colored liquids and for hot and cold air, Terschitz-type spools adapted to spray nozzles consisting of a rotating drum, fixed drums with internal spray nozzles adapted to spray nozzles, etc. Nauta (trade name) mixer of the type consisting of a conical container with a rotating sprayer adapted to a spray nozzle etc.

In order to carry out this four-step process, preheating of the particles,
Spraying, drying, and cooling of the colorant is required. The amount of dye or rtP+ suspension sprayed onto the alkali metal silicate particles is typically 0 mm per alkali metal silicate reference.
Between 1% and 5%, preferably 0mm5% and 2.0%
It's between.

The particle size distribution of the starting particles determines the size of the colored spot material, and most alkali metal silicate particles have a variety of particle size ranges,
They are often available with a narrow or narrow particle size range selected depending on the size desired for the cleaning composition.

The solution sprayed onto the particulate alkali metal silicate material contains approximately 0.05 to 50% of the colorant, preferably completely dissolved. Of course, there are limits to the solubility of dyes, for example in solvents. Although water is preferred as a solvent, it is also effective to use methanol (aqueous) to increase the solubility of the dye.

The amount of liquid sprayed onto the particles is usually 0 m of silicate weight.
Between 1% and 5% m, preferably between 5% and 2% m, spraying is completed within a few minutes to 30 minutes, with 2 to 10 minutes being typical spray times.

The best results were obtained by preheating the alkali metal silicate particles on the surface where spraying of the colorant solution was initiated.

Alkali metal silicon in any case! It is best to avoid heating the I salt particles above their melting point, which in the case of sodium metasilicate pentahydrate is around 72°C. The temperature of the gas (air) that is blown onto the still wet particles is usually 25
It varies between 30°C and 40°C, preferably between 30°C and 40°C. It is necessary to monitor the moisture content of the particles during the drying operation to ensure that the specific silicate hydrate is substantially formed and maintained. The percentage of water a particle has also determines its bulk density. Cooling the detergent spot material while maintaining it in a constant state of motion promotes surface coagulation and prevents caking.

In this way, the detergent-spotted material has a uniform color and
It is extremely wear resistant and has a particle size distribution virtually identical to that of the alkali metal silicate that the starting particles had.

The use of alkali metal silicates as cores for spotted wood is particularly efficient. This is due to one or more of the following reasons.

1) the silicate is the active ingredient of the cleaning composition and therefore no extra ingredients are introduced; 2) the silicate core is in no case added to the powder composition (utilized in the form of 3) the silicate fleck material dissolves quickly and provides rapid dissolution and dilution of the surface colorant; 4) the silicate surface does not absorb the colorant and therefore efficiently absorbs the colorant. 5) the silicate dots have a uniform and good appearance; and 6) the alkali metal silica Acid salts are suitable for dense powders! [Can be prepared to have the following.

Example The invention is further illustrated by the following examples.

1) Take 1.5 kg of sodium metasilicate pentahydrate particles with a particle size between 0 mm2 #1ffi and 1.2 m,
It was placed in a 51 capacity Ledeig mixer. This mixing switch was turned on, and hot air at a temperature of 50°C was blown into the contents to preheat them to a temperature of 35° to 45°C.

An aqueous solution containing 25% Monastral Blue by weight was sprayed onto the particles for about 5 minutes. The n of the solution sprayed onto the particles was 18%, measured q by weight of metasilicate. Therefore, only 0 mm25% of the dye was used, based on the metasilicate. Drying was carried out at a temperature of 35 to 40°C for about 20 minutes.

The water content of the metasilicate 9 was monitored during drying and was approximately 4 by weight.
It was kept at 3%. Cleaner-spotted wood is then blown with cold air 2.
Cooled to 0°C. The detergent spotted material thus obtained exhibited excellent definition, deep hue, was uniformly colored, and retained color stability and substantially its original particle size distribution. Mixed in detergents at a level of 1% by weight gave the product excellent consumer appeal.

2) Sodium disilicate (Na2O: 5tOe ratio 1:
2) was sprayed to prepare granules.

The granules were fed to two rollers by a feed screw and pressed into a thin sheet with a thickness of about 100 mm.

This sheet is crushed by passing it between gears with meshing teeth,
The product was sieved to give a granular product with a particle size distribution between 0mm3mm+ and 1.2m.

The product had a bulk density of approximately 850 g/g.

This granular product was coated with Monastral Blue by the method described in Example 1). However, a 50% aqueous suspension was used to achieve a level of coverage of 25% by weight (9) and 0 mm for the silicate. This product was then incorporated into cleaning products as a spotting agent.

Claims (10)

[Claims] (1) The colored granular material is made of an alkali metal silicate, and the particles of the granular material are coated with a colored material. (2) The colored granular material according to claim 1, wherein the colored granular material is made of sodium silicate. (3) The colored granular material according to claim 1 or 2, wherein the alkali metal silicate is a metasilicate. (4) The colored granular material according to claim 1, 2 or 3, wherein the alkali metal silicate is an alkali metal silicate hydrate. (5) The colored granular material according to claim 2, 3 or 4, wherein the sodium silicate is a hydrate containing 5 to 6 molecules of water per molecule of silicate in its crystals. . (6) The colored granular material according to any one of claims 1 to 5, wherein the particles have an average particle size of 0.2 to 2.0 mm. (7) Claim 1, wherein the particles are spherical.
7. The colored particles according to any one of items 6 to 6. (8) The pigment and/or dye is selected from the class consisting of Monastral Blue and Monastral Green plus Unidisperse Blue. said colored particulate material. (9) In the method for producing a colored granular material, spraying the particles,
A method for producing colored granular materials as described above, characterized in that a dye solution or a suspension of pigment is sprayed onto the alkali metal silicate particles while keeping them in motion during drying and cooling. (10) A detergent powder composition comprising the colored granular material according to any one of claims 1 to 8.