ES2301245T3 - COLORED GRANULAR COMPOSITION FOR USE IN COMPOSITIONS OF PARTICULATED DETERGENTS. - Google Patents

Abstract

A granular composition suitable for incorporation into a particulate detergent composition, the granular composition comprising (a) a colored or fluorescent ingredient, (b) a carrier material for the colored or fluorescent ingredient, characterized in that the carrier material (b) it is citric acid, and the granular composition further comprises (c) a water soluble or water dispersible barrier material, and (d) an inorganic flow modifier.

Description

Colored granular composition for use in particulate detergent compositions.

Technical field

The present invention relates to a fast dissolving granular composition, which produces few spots, which contains a visually differentiable ingredient, by for example, colored or fluorescent, for example, a photobleach. The invention relates, more specifically, to granules containing a colored or fluorescent ingredient that can be incorporated into a detergent composition without the problem of stains on the fabric during washing.

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Background and prior art

Colored particles are used in detergent formulations to provide a differentiated appearance to the product, as well as to confer functional benefits. At washing procedure, it is undesirable that these particles colored are deposited on the surface of the tissue, leading to stains on the tissue. It has also been warned that these spots They are not removed in subsequent washes. In addition, the concentration uneven of these particles on the substrate can produce about higher localized levels of the active ingredient that causes tissue damage

US 4,097,418 (Procter & Gamble, 1978) describes a granular colored particle that has qualities  of not producing spots, which comprises a salt agglomerate granular water soluble inorganic alkaline with a surfactant anionic that contains a dye or pigment. The dye mixture and the anionic surfactant before agglomeration prevents the pigment particles join together and on the surface of the tissue, thereby avoiding stains on the tissue.

US 4,762,636 (Ciba-Geigy, 1988) describes a procedure for obtain granules with defined physical properties that float on an aqueous treatment liquor, and release the active ingredient without deposit on the substrate.

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Summary of the invention

Therefore, an object of the present invention is provide a granule composition that contains a colored or fluorescent ingredient that can be incorporated into a detergent composition without the problem of stains in the tissue during the washing procedure.

Another object of the present invention is provide a granule composition that has a superior property of not producing stains, which can be manufactured by a procedure that is more economical and that implies a lower cost of capital, compared to known procedures.

Accordingly, the present invention provides a granular composition suitable for incorporation in a particulate detergent composition, comprising the granular composition

(a) a colored or fluorescent ingredient,

(b) citric acid as a carrier material for the colored or fluorescent ingredient,

(c) a water soluble barrier material or water dispersible, and

(d) an inorganic flow modifier.

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The water soluble barrier material or water dispersible acts to provide a protective layer or coating on the combination of the colored ingredient or fluorescent and its carrier material, citric acid. Preferably, at least part of the inorganic flow modifier It is also protected in this way. Can also be present another inorganic flow modifier that is not protected by the barrette material.

The term coating, used previously, it does not necessarily imply a coating full.

Therefore, according to a preferred embodiment of the invention,

- the colored or fluorescent ingredient is dispersed on, or in the form of a coating on, the acid citric,

- the citric acid that carries the ingredient colored or fluorescent is mixed with the flow modifier or a portion thereof,

- the barrier material is in the form of a coating on said mixture of citric acid and modifier of the flow, combining (mixing) with any remaining portion of the flow modifier.

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According to another preferred aspect of the invention, the granule composition comprises:

- from 40% to 90% by weight, preferably from 60% to 80% by weight of citric acid,

- from 0.5% to 5% by weight, preferably 1% 2% by weight, of the colored or fluorescent ingredient,

- from 10% to 50% by weight, preferably from 18% to 40% by weight of the inorganic flow modifier, and

- from 0.5% to 5% by weight, preferably 1% at 3% by weight, of the water soluble barrier material.

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The granular composition of the invention can be prepared by a procedure in which the ingredient colored or fluorescent is dispersed over citric acid, which then mixed with part or all of the flow modifier inorganic, and the total is treated with the barrier material, and then it is granulated with any remaining flow modifier inorganic.

Therefore, according to another aspect of the invention, a procedure is provided for the preparation of a granule composition comprising the steps of:

(i) disperse the colored ingredient or fluorescent on citric acid and granular with the modifier of the inorganic flow or a portion thereof;

(ii) dry the material, preferably at a temperature within the range of 15 ° C to 50 ° C, preferably of 20 ° C to 40 ° C;

(iii) treat the dried material with the material water soluble or water dispersible barrier;

(iv) optionally, granulate said material treated with any remaining adjuvant flow modifier and dry

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Examples of colored ingredients or fluorescents are photoactivators (also known as photo whitening), especially phthalocyanines; the pigments and colored dyes; fluorescent whitening agents; and their mixtures Especially preferred ingredients are those photo bleachers, zinc and aluminum phthalocyaninsulfonates.

The inorganic flow modifier can be selected from kaolin (preferably washed kaolin), silica, precipitated silica, precipitated calcium carbonate and earth diatoms / siliceous. Especially preferred are kaolin, silica and their mixtures.

The water soluble barrier material or water dispersible, preferably water soluble, can appropriately selected from water soluble starches, polyvinyl alcohols, polyethylene glycols and latex. The Preferred materials are starches and poly (alcohols vinyl).

As previously indicated, the granules of the present invention can be prepared by dispersing the ingredient colored or fluorescent on citric acid, for example, in a rotary tray granulator, and later or simultaneously adding a suitable flow modifier. Chipboard resulting is dried and re-coated with the material of water soluble or water dispersible barrier, and optionally granulate with more flow modifier and dries.

Another subject of the invention is a composition. particulate detergent comprising detergent surfactants organic and other detergent ingredients, and comprises a granular composition as previously defined. The composition particulate washing detergent of the invention may comprise, suitably, from 5% to 60% by weight of organic surfactant, 10% to 80% by weight of detergency builder, 0.1% 10% by weight, preferably 0.5% to 5% by weight of a granular composition as previously defined, and optionally other detergent ingredients up to 100% by weight.

The invention will be further illustrated below. background by the following non-limiting examples, in which parts and percentages are by weight, unless indicated contrary. The examples indicated with a number agree with the invention, while the examples indicated with a letter They are comparative.

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Example 1, Comparative Examples A - C

Preparation of granular compositions

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Example 1 Photoblanking granules that use an acid vehicle citrus and a starch barrier material

8 kg of citric acid were placed in a rotary tray granulator and 200 g were sprayed on them of a solution of aluminum phthalocyaninsulfonate (concentration at 10%). During spraying, half of the amount of a mixture of 0.8 kg of kaolin and 500 g of silica. He material was dried at 40 ° C for approximately 4 hours. He material was taken back to a rotary tray granulator and 500 g of a starch solution was sprayed on it (10% concentration by weight). The other half of the mixture was added of kaolin and silica. The material was dried at 40 ° C for 4 hours.

The formulation of the granular material is the next:

one

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Example 2 Photoblanking granules using an acid vehicle citrus and a poly (alcohol barrier material) vinyl)

Photoblanking granules were prepared as in Example 1, but the starch solution was replaced by a polyvinyl alcohol solution (10% concentration in weight).

The final formulation of the granular material is the next:

2

Comparative example TO

Granules were prepared by the procedure from example 1, but using soda ash instead of acid citric.

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Comparative example B

Granules were prepared by the procedure from example 1, but using sodium tripolyphosphate instead of citric acid.

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Wash protocol

Pieces of cotton fabric of 25.4 cm x 25.4 cm in trays, each with 2 kg of water and one of the following photoblanking granular compositions:

Example one

Comparative Example A

Comparative Example B

Comparative example C: blue particles commercially available, Laundrosil (trademark) Sud-Chemie PRT-2, containing aluminum phthalocyan sulphonate on a clay vehicle of bentonite.

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Each piece of tissue was allowed to soak for 30 minutes Then the tissue was washed in running water and It dried in the sun. Four replicas were maintained for each treatment. A panel of trained members analyzed the tissue of visual way to observe blue spots on a scale of 0 to 5 as follows:

Punctuation

Stain level

0-1

minimal / insignificant

2-3

perceptible

4-5

significant blue spots

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Data were analyzed statistically and were They show in the following table.

3

The data presented in the table show that commercially available granules stained considerably the tissue, while the use of the granules according to the invention It has a significantly superior effect to control stains on the tissue. This is also checked by the fact than the granules manufactured by the same procedure, but substituting citric acid for soda ash or tripolyphosphate sodium, did not significantly prevent stains on the tissue.

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Examples 3 and 4

Detergent compositions

Detergent compositions were prepared granular by dry mixing the following formulations:

Alkylbenzenesulfonate linear

30

Carbonate sodium

twenty

Tripolyphosphate sodium

40

Photoblanking granules (see below)

2

Enzymes, perfume, fluorescent, water, etc. until

100

The detergent composition of Example 3 contained the photoblanking granules of example 1 (acid carrier citric, starch barrier material).

The detergent composition of Example 4 contained the photoblanking granules of example 2 (acid carrier citric, polyvinyl alcohol barrier material).

Both detergent compositions were preserved in bags of 500 g from May to December under the following conditions that represent the conditions of summer, monsoon and of winter in India:

4

No instability was detected, as determined by visual inspection, at the end of the period of conservation.

Claims (12)

1. A granular composition suitable for its incorporation into a particulate detergent composition, comprising the granular composition (a) a colored or fluorescent ingredient, (b) a carrier material for the ingredient colored or fluorescent, characterized in that the carrier material (b) is citric acid, and the granular composition further comprises (c) a water soluble barrier material or water dispersible, and (d) an inorganic flow modifier. 2. A granular composition according to claim 1, characterized in that: - the colored or fluorescent ingredient (a) is dispersed on, or in the form of a coating on, the acid citrus (b), which is mixed with the flow modifier inorganic (d) or a portion thereof, and - the barrier material (c) is in the form of a coating on the mixture of citric acid and modifier of the coated flow, the coated mixture being mixed with any remaining portion of the inorganic flow modifier (d). 3. A granular composition according to any one of the preceding claims, characterized in that it comprises: (a) from 0.5% to 5% by weight, preferably from 1% to 2% by weight, of the colored or fluorescent ingredient, (b) from 40% to 90% by weight, preferably of 60% to 80% by weight of citric acid, (c) from 0.5% to 5% by weight, preferably from 1% to 3% by weight of the water soluble barrier material or water dispersible, (d) from 10% to 50% by weight, preferably of 18% to 40% by weight of the inorganic flow modifier. 4. A granular composition according to any one of the preceding claims, characterized in that the colored or fluorescent ingredient (a) is selected from photoactivators (photobleaching), pigments, dyes, and fluorescent bleaching agents. 5. A granular composition according to claim 4, characterized in that the colored or fluorescent ingredient (a) is a zinc or aluminum phthalocyaninsulfonate. 6. A granular composition according to any one of the preceding claims, characterized in that the water soluble or water dispersible barrier material (c) is selected from water soluble starches, polyvinyl alcohols, polyethylene glycols, and latices. 7. A granular composition according to claim 6, characterized in that the barrier material (c) is water soluble, and is a starch or a polyvinyl alcohol. 8. A granular composition according to any one of the preceding claims, characterized in that the inorganic flow modifier (d) is selected from kaolin, silica, precipitated silica, precipitated calcium carbonate, and diatomaceous / siliceous earth. 9. A granular composition according to claim 8, characterized in that the inorganic flow modifier (d) comprises kaolin, silica or mixtures thereof. 10. A particulate washing detergent composition comprising from 5% to 60% by weight of organic surfactant, from 10% to 80% by weight of detergency builder, and optionally other detergent ingredients up to 100% by weight, which is characterized in that it comprises from 0.1% to 10% by weight, preferably from 0.5% to 5% by weight of a granular composition according to any one of claims 1 to 11. 11. A process for the preparation of a granular composition according to claim 1, characterized in that it comprises the steps of: (i) disperse the colored ingredient or fluorescent (a) on citric acid (b), and granulate with a portion or with the entire inorganic flow modifier (d), (ii) dry the granulated material obtained from this way, (iii) treat the dried material with the material water soluble or water dispersible barrier (c), (iv) optionally, granulate the treated material obtained in this way with any remaining modifier of the inorganic flow (d), and dry. 12. A process according to claim 11, characterized in that the drying step (iii) is carried out at a temperature within the range of 15 ° C to 50 ° C, preferably 20 ° C to 40 ° C.